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Sample records for boiler feed pump

  1. Combined boiler feed and condensate pump

    SciTech Connect

    Paul Cooper, Titusville, N.J.

    1993-06-01

    A pump for drawing the condensate from a condenser and feeding it to a steam boiler is described, the combination comprising: an elongate casing adapted to be connected in a pipeline having an inlet for receiving the condensate from a steam condenser and an outlet for feeding the condensate to a steam boiler; a pump shaft mounted in said casing rotating in a pair of bearings spaced along said shaft and fixed in said casing; an electric motor mounted in said casing connected to one end of said shaft for driving it; control means for operating said electric motor; an inducer pump mounted at the other end of said shaft, driven by said shaft; a multiple stage centrifugal feed pump located in said casing driven by said shaft and receiving condensate from the inducer pump, pumping said condensate to a higher pressure suitable for feeding a steam boiler and delivering said condensate to the outlet of said pump, the multiple stage centrifugal feed pump being located adjacent said inducer pump; and said inducer pump being of the type to produce sufficient positive pressure for properly feeding condensate to said feed pump.

  2. Steam driven centrifugal pump for low cost boiler feed service

    SciTech Connect

    Not Available

    1982-11-01

    This article describes a steam driven centrifugal pump for boiler feed-water and other high pressure water applications, which was awarded Top Honors in the special pumps category of the 1982 Chemical processing Vaaler competition, because the simple design with turbine, pump and controls combined in an integral unit provides high operating efficiency and reliable performance with minimal maintenance. Single source responsibility for all components when the pump may have to be serviced is another advantage. These features meet the requirements for boiler feed pumps that are critical to maintaining a consistent steam supply in a process plant where downtime can be extremely expensive. The annual cost to operate the pump for 8000 hours is about $100,000, if electricity costs 5 cents/kwh. These pumps can be run for about $30,000 on steam, if natural gas costs $4.00/mcf. Cost savings are $70,000 annually.

  3. A review of vibration problems in power station boiler feed pumps

    NASA Technical Reports Server (NTRS)

    France, David

    1994-01-01

    Boiler feed pump reliability and availability is recognized as important to the overall efficiency of power generation. Vibration monitoring is often used as a part of planned maintenance. This paper reviews a number of different types of boiler feed pump vibration problems describing some methods of solution in the process. It is hoped that this review may assist both designers and users faced with similar problems.

  4. Fabrication and test of a space power boiler feed electromagnetic pump. Part 1: Design and manufacture of pump

    NASA Technical Reports Server (NTRS)

    Gahan, J. W.; Powell, A. H.; Pileggi, P. T.; Thompson, S. P.

    1972-01-01

    A three-phase helical induction electromagnetic (EM) pump has been designed and built. This pump was designed for use as the boiler-feed pump of a potassium Rankine-cycle space electric power system. The pump is constructed of high temperature materials including a T-111 duct, Hiperco 27 magnetic material, nickel clad silver conductor wire, and a completely inorganic insulation system. The pump is designed to deliver 3.25 lb/sec potassium at 1000 F with a developed head of 240 psi while being cooled by 800 F NaK. At these conditions, the overall pump efficiency is expected to be 18%.

  5. Fabrication and test of a space power boiler feed electromagnetic pump. Part 2: Test facility and performance test

    NASA Technical Reports Server (NTRS)

    Powell, A. H.; Amos, J. C.; Ehde, C. L.; Gahan, J. W.

    1972-01-01

    A three-phase helical induction electromagnetic pump, designed for the boiler-feed pump of a potassium Rankine-cycle space power system, was built and tested. The pump was tested over a range of potassium temperatures from 900 to 1400 F, flow rates from 0.75 to 4.85 lb/sec, developed pressures up to 340 psi, net positive suction heads (NPSH) from 1 to 22 psi, and NaK coolant temperatures from 800 to 950 F. The maximum efficiency at the pump design point of 3.25 lb/sec flow rate, 240 psi developed pressure, 1000 F potassium inlet temperature, and 800 F NaK coolant temperature was 16.3 percent. The tests also showed successful operation of the pump at an NPSH as low as 1.5 psi without cavitating.

  6. Fabrication and test of a space power boiler feed electromagnetic pump. 3: Endurance and final performance tests

    NASA Technical Reports Server (NTRS)

    Powell, A. H.; Amos, J. C.

    1972-01-01

    A three-phase helical induction electromagnetic pump designed for the boiler feed pump of a potassium Rankine cycle space power system was developed and built. It was mounted in a liquid metal test loop and successfully tested over a range of potassium temperatures from 900 to 1400 F, flow rates from 0.75 to 4.85 lb/sec, developed pressures up to 340 psi, net positive suction head from 1 to 22 psi, and NaK coolant temperatures from 800 to 950 F. Maximum efficiency at design point conditions of 3.25 lb/sec flow rate, 240 psi developed head, 1000 F potassium inlet temperature, and 800 F NaK coolant inlet temperature was 16.3 percent. After the performance tests the pump was operated without any difficulty at design point for 10,000 hours, and then a limited number of repeat performance tests were made. There was no appreciable change in pump performance after 10,000 hours of operation. A supplementary series of tests using the quasi-square wave power output of a dc to three-phase ac inverter showed that the pump would operate without difficulty at a frequency as low as 25 Hz, with little loss in efficiency.

  7. Looking south at boiler feedwater pumps (steam turbine pump on ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking south at boiler feedwater pumps (steam turbine pump on left, electric motor pump on right). - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  8. 46 CFR 56.50-30 - Boiler feed piping.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... requirements. (1) Steam vessels, and motor vessels fitted with steam driven electrical generators shall have at... the main propelling unit, shall be provided with at least one independently driven feed pump. Each of... boilers at their normal capacity. In addition, a second independently driven pump, capable of supplying...

  9. 46 CFR 56.50-30 - Boiler feed piping.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... requirements. (1) Steam vessels, and motor vessels fitted with steam driven electrical generators shall have at... the main propelling unit, shall be provided with at least one independently driven feed pump. Each of... boilers at their normal capacity. In addition, a second independently driven pump, capable of supplying...

  10. 46 CFR 56.50-30 - Boiler feed piping.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... requirements. (1) Steam vessels, and motor vessels fitted with steam driven electrical generators shall have at... the main propelling unit, shall be provided with at least one independently driven feed pump. Each of... boilers at their normal capacity. In addition, a second independently driven pump, capable of supplying...

  11. 46 CFR 56.50-30 - Boiler feed piping.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... requirements. (1) Steam vessels, and motor vessels fitted with steam driven electrical generators shall have at... the main propelling unit, shall be provided with at least one independently driven feed pump. Each of... boilers at their normal capacity. In addition, a second independently driven pump, capable of supplying...

  12. 46 CFR 56.50-30 - Boiler feed piping.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... requirements. (1) Steam vessels, and motor vessels fitted with steam driven electrical generators shall have at... the main propelling unit, shall be provided with at least one independently driven feed pump. Each of... boilers at their normal capacity. In addition, a second independently driven pump, capable of supplying...

  13. Fluidized bed boiler feed system

    DOEpatents

    Jones, Brian C.

    1981-01-01

    A fluidized bed boiler feed system for the combustion of pulverized coal. Coal is first screened to separate large from small particles. Large particles of coal are fed directly to the top of the fluidized bed while fine particles are first mixed with recycled char, preheated, and then fed into the interior of the fluidized bed to promote char burnout and to avoid elutriation and carryover.

  14. Tdp studies and tests for C. A. Energia Electrica de Venezuela (enelven) at planta ramon laguna, units RL-17 and RL-10. Volume 3. Unit RL-10 turbine generator condition assessment report and units RL-10 and RL-11 boiler feed pump conditon assessment report. Export trade information

    SciTech Connect

    Not Available

    1991-03-28

    The study, conducted by Babcock and Wilcox, was funded by the U.S. Trade and Development agency on behalf of Enelven. In order to maximize generated power output and minimize operating costs at Planta Ramon Laguna, tests were done to evaluate the condition of equipment at the plant. In order to identify any damage and determine the operating output of each unit, assessments were done of the furnaces, boilers, generators and boiler feed pumps being used in the plant. The report presents the results of these tests. This is the last of three volumes and it is divided into the following sections: (1) Condition Assessment of Unit RL-10 Turbine-Generator; (2) Condition Assessment of Unit RL-10 and RL-11 Boiler Feed Pumps.

  15. Hydraulic turbine-driven boiler circulation pump. Final report

    SciTech Connect

    Oliker, I.

    1995-09-01

    The purpose of this project was to demonstrate the unique technical features and performance of an advanced Russian hydraulic turbine-driven boiler circulation pump. The major task was to test the pump at the supercritical 250 MW unit located at the Southern Power Plant, Lenenergo, in St. Petersburg, Russia. The field tests demonstrated that the circulation pump operates efficiently and reliably.

  16. 27. GENERAL VIEW OF PUMP HOUSE, TURBOGENERATOR BUILDING, TURBOGENERATOR BOILER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. GENERAL VIEW OF PUMP HOUSE, TURBO-GENERATOR BUILDING, TURBO-GENERATOR BOILER HOUSE, AND CARRIE FURNACE No. 3. - U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela River, Homestead, Allegheny County, PA

  17. Gastrostomy feeding tube - pump

    MedlinePlus

    ... before use. DO NOT add more formula or solid foods before you talk to your nurse. Feeding ... MD, gastroenterologist with Gastrointestinal Specialists of Georgia, Austell, GA. Review provided by VeriMed Healthcare Network. Also reviewed ...

  18. Feed-pump hydraulic performance and design improvement. Final report

    SciTech Connect

    Dunfee, J.D.; Anwar, I.M.; Rusak, V.; Silvaggio, J.A. Jr.; Spring, H.

    1982-03-01

    As a result of surveys of the industry and the literature (1960 to 1980), which are described in detail, a proposed research plan is presented that is designed to improve the reliability of boiler feed pumps, which are a key factor in power plant availability. The proposed research tasks can be divided into three major categories: studies of flow phenomena in the pump, improvement of mechanical components supporting and sealing the rotor, and utility aids designed to offer immediate help to the utilities in areas of pump specification, procurement, maintenance, and reliability. A method is presented of estimating the anticipated payback versus estimated research costs.

  19. Solid fuel feed system for a boiler

    SciTech Connect

    Clamser, C.J.; Powers, R.A.

    1986-07-08

    A fuel system is described for a boiler comprising inlet means for receiving the fuel, hopper means for storing the fuel, discharge means for discharging fuel to the boiler, first conveyor belt means extending between the inlet means and the hopper means and constructed and arranged for receiving the fuel from the inlet means and conveying the fuel to the hopper means, second conveyor belt means extending between the hopper means and the discharge means, a portion of the second conveyor means extending within the hopper means for receiving the accumulated fuel in the hopper means. The second conveyor means is constructed and arranged to transfer the fuel from the hopper means to the discharge means, first control means for controlling the speed of the first conveyor belt means in response to the amount of fuel in the hopper means, second control means responsive to the operation of the boiler for controlling the speed of the second conveyor belt means, sensing means for sensing the speed of each of the conveyor belts, alarm means connected to the sensing means for providing an alarm in response to the speed of the conveyor belt means falling below or above a predetermined value, and means associated with each of the conveyor belt means for controlling the level of the fuel on the belt means.

  20. An alternative process to treat boiler feed water for reuse.

    PubMed

    Guirgis, Adel; Ghosh, Jyoti P; Achari, Gopal; Langford, Cooper H; Banerjee, Daliya

    2012-09-01

    A bench-scale process to treat boiler feed water for reuse in steam generation was developed. Industrial water samples from a steam-assisted gravity drainage plant in northern Alberta, Canada, were obtained and samples characterized. The technology, which consists of coagulation-settling to remove oil/grease and particulates followed by an advanced oxidative treatment, led to clean water samples with negligible organic carbon. Coagulation followed by settling removed most particulates and some insoluble organics. The advanced oxidative treatment removed any remaining color in the samples, decreased the organic content to near-zero, and provided water ready for reuse.

  1. New configurations of a heat recovery absorption heat pump integrated with a natural gas boiler for boiler efficiency improvement

    SciTech Connect

    Qu, Ming; Abdelaziz, Omar; Yin, Hongxi

    2014-11-01

    Conventional natural gas-fired boilers exhaust flue gas direct to the atmosphere at 150 200 C, which, at such temperatures, contains large amount of energy and results in relatively low thermal efficiency ranging from 70% to 80%. Although condensing boilers for recovering the heat in the flue gas have been developed over the past 40 years, their present market share is still less than 25%. The major reason for this relatively slow acceptance is the limited improvement in the thermal efficiency of condensing boilers. In the condensing boiler, the temperature of the hot water return at the range of 50 60 C, which is used to cool the flue gas, is very close to the dew point of the water vapor in the flue gas. Therefore, the latent heat, the majority of the waste heat in the flue gas, which is contained in the water vapor, cannot be recovered. This paper presents a new approach to improve boiler thermal efficiency by integrating absorption heat pumps with natural gas boilers for waste heat recovery (HRAHP). Three configurations of HRAHPs are introduced and discussed. The three configurations are modeled in detail to illustrate the significant thermal efficiency improvement they attain. Further, for conceptual proof and validation, an existing hot water-driven absorption chiller is operated as a heat pump at operating conditions similar to one of the devised configurations. An overall system performance and economic analysis are provided for decision-making and as evidence of the potential benefits. These three configurations of HRAHP provide a pathway to achieving realistic high-efficiency natural gas boilers for applications with process fluid return temperatures higher than or close to the dew point of the water vapor in the flue gas.

  2. 30. VIEW OF BASEMENT BELOW FIRING AISLE OF EAST BOILER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    30. VIEW OF BASEMENT BELOW FIRING AISLE OF EAST BOILER ROOM SHOWING BOILER FEED WATER PUMP. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  3. Tank 26 Evaporator Feed Pump Transfer Analysis

    SciTech Connect

    Tamburello, David; Dimenna, Richard; Lee, Si

    2009-02-11

    The transfer of liquid salt solution from Tank 26 to an evaporator is to be accomplished by activating the evaporator feed pump, located approximately 72 inches above the sludge layer, while simultaneously turning on the downcomer. Previously, activation of the evaporator feed pump was an isolated event without any other components running at the same time. An analysis of the dissolved solution transfer has been performed using computational fluid dynamics methods to determine the amount of entrained sludge solids pumped out of the tank to the evaporator with the downcomer turned on. The analysis results showed that, for the maximum and minimum supernate levels in Tank 26 (252.5 and 72 inches above the sludge layer, respectively), the evaporator feed pump will entrain between 0.03 and 0.1 wt% sludge undissolved solids weight fraction into the eductor, respectively, and therefore are an order of magnitude less than the 1.0 wt% undissolved solids loading criteria to feed the evaporator. Lower tank liquid levels, with respect to the sludge layer, result in higher amounts of sludge entrainment due to the increased velocity of the plunging jets from the downcomer and evaporator feed pump bypass as well as decreased dissipation depth. Revision 1 clarifies the analysis presented in Revision 0 and corrects a mathematical error in the calculations for Table 4.1 in Revision 0. However, the conclusions and recommendations of the analysis do not change for Revision 1.

  4. Advanced high-temperature electromagnetic pump

    NASA Technical Reports Server (NTRS)

    Gahan, J. W.; Powell, A. H.

    1972-01-01

    Three phase helical, electromagnetic induction pump for use as boiler feed pump in potassium Rankine-cycle power system is described. Techniques for fabricating components of pump are discussed. Specifications of pump are analyzed.

  5. TANK 26 EVAPORATOR FEED PUMP TRANSFER ANALYSIS

    SciTech Connect

    Tamburello, D; Si Lee, S; Richard Dimenna, R

    2008-09-30

    The transfer of liquid salt solution from Tank 26 to an evaporator is to be accomplished by activating the evaporator feed pump, located approximately 72 inches above the sludge layer, while simultaneously turning on the downcomer. Previously, activation of the evaporator feed pump was an isolated event without any other components running at the same time. An analysis of the dissolved solution transfer has been performed using computational fluid dynamics methods to determine the amount of entrained sludge solids pumped out of the tank to the evaporator with the downcomer turned on. The analysis results showed that, for the maximum and minimum supernate levels in Tank 26 (252.5 and 72 inches above the sludge layer, respectively), the evaporator feed pump will entrain between 0.05 and 0.1 wt% sludge solids weight fraction into the eductor, respectively. Lower tank liquid levels, with respect to the sludge layer, result in higher amounts of sludge entrainment due to the increased velocity of the plunging jets from the downcomer and evaporator feed pump bypass as well as decreased dissipation depth.

  6. Energy-conserving heat pump-boiler systems for district heating

    SciTech Connect

    Taniguchi, H.; Giedt, W.H.; Kasahara, K.; Kawamura, K.; Kudo, K.; Ohta, J.

    1983-08-01

    The energy saving potential of a proposed heat pump-boiler system for district heating is analyzed. Fuel is supplied to a boiler which generates steam to drive a turbine. The turbine output is used to power a heat pump which takes energy from the environment. Introduction of a screw type expander in place of the throttling valve in the heat pump cycle is planned to increase the system performance. District heating is provided by hot water which is heated as it flows through the condensers in the heat pump and turbine cycles. Both series and parallel connected condenser arrangements are considered. Results show that the heat supplied to the water for district heating can be as high as 200 percent of the heating that would be provided by use of the fuel supplied to a conventional boiler system with a thermal efficiency of 90 percent.

  7. TANK 32 EVAPORATOR FEED PUMP TRANSFER ANALYSIS

    SciTech Connect

    Tamburello, D; Richard Dimenna, R; Si Lee, S

    2009-01-27

    The transfer of liquid salt solution from Tank 32 to an evaporator is to be accomplished by activating the evaporator feed pump, with the supernate surface at a minimum height of approximately 74.4 inches above the sludge layer, while simultaneously turning on the downcomer with a flow rate of 110 gpm. Previously, activation of the evaporator feed pump was an isolated event without any other components running at the same time. An analysis of the dissolved solution transfer has been performed using computational fluid dynamics (CFD) methods to determine the amount of entrained sludge solids pumped out of the tank toward the evaporator with the downcomer turned on. The analysis results shows that, for the minimum tank liquid level of 105 inches above the tank bottom (which corresponds to a liquid depth of 74.4 inches above the sludge layer), the evaporator feed pump will contain less than 0.1 wt% sludge solids in the discharge stream, which is an order of magnitude less than the 1.0 wt% undissolved solids (UDS) loading criteria to feed the evaporator. Lower liquid levels with respect to the sludge layer will result in higher amounts of sludge entrainment due to the increased plunging jet velocity from the downcomer disturbing the sludge layer.

  8. Numerical simulation on casing modification of a boiler water circulation pump

    NASA Astrophysics Data System (ADS)

    Li, Y. Z.; Fan, Y. Z.; Liu, S. H.; Wu, Y. L.; Zuo, Z. G.

    2012-11-01

    In this paper, hydraulic performance comparisons are made by numerical simulation method on boiler water circulation pump with casings of different shapes. The existing pump adopts a semispherical casing and a garlic-shaped casing. Results show that in the garlic-shaped casing noticeable swirling vortex can be found in the top region of the discharge nozzle, and semispherical casing has better performance in hydraulic efficiency and head.

  9. LASERS: YAG:Nd laser pumped by an"optical boiler" system

    NASA Astrophysics Data System (ADS)

    Gondra, A. D.; Gradov, V. M.; Dybko, V. V.; Konstantinov, B. A.; Kromskiĭ, G. I.; Rogal'skiĭ, Yu I.; Rozhdestvin, V. N.; Smotryaev, S. A.; Terent'ev, Yu I.; Fefelov, A. P.; Khomenko, S. I.; Shcherbakov, A. A.

    1987-12-01

    New capabilities of an "optical boiler" pumping system, characterized by a high lasing efficiency and a high density of the stored energy, were predicted theoretically and confirmed experimentally. A record lasing efficiency of ~ 2.85% for single pulses was achieved in a pumping system with YAG:Nd rods distributed around a flashlamp when the output energy from one rod was 300 mJ. An increase in the efficiency in excess of 3% was forecast.

  10. Development of a mercury electromagnetic centrifugal pump for the SNAP-8 refractory boiler development program

    NASA Technical Reports Server (NTRS)

    Fuller, R. A.; Schnacke, A. W.

    1974-01-01

    An electromagnetic pump, in which pressure is developed in mercury because of the interaction of the magnetic field and current which flows as a result of the voltage induced in the mercury contained in the pump duct, was developed for the SNAP-8 refractory boiler test facility. Pump performance results are presented for ten duct configurations and two stator sizes. These test results were used to design and fabricate a pump which met the SNAP-8 criteria of 530 psi developed pressure at 12,500 lb/hr. The pump operated continuously for over 13,000 hours without failure or performance degradation. Included in this report are descriptions of the experimental equipment, measurement techniques, all experimental data, and an analysis of the electrical losses in the pump.

  11. Enteral feeding pumps: efficacy, safety, and patient acceptability

    PubMed Central

    White, Helen; King, Linsey

    2014-01-01

    Enteral feeding is a long established practice across pediatric and adult populations, to enhance nutritional intake and prevent malnutrition. Despite recognition of the importance of nutrition within the modern health agenda, evaluation of the efficacy of how such feeds are delivered is more limited. The accuracy, safety, and consistency with which enteral feed pump systems dispense nutritional formulae are important determinants of their use and acceptability. Enteral feed pump safety has received increased interest in recent years as enteral pumps are used across hospital and home settings. Four areas of enteral feed pump safety have emerged: the consistent and accurate delivery of formula; the minimization of errors associated with tube misconnection; the impact of continuous feed delivery itself (via an enteral feed pump); and the chemical composition of the casing used in enteral feed pump manufacture. The daily use of pumps in delivery of enteral feeds in a home setting predominantly falls to the hands of parents and caregivers. Their understanding of the use and function of their pump is necessary to ensure appropriate, safe, and accurate delivery of enteral nutrition; their experience with this is important in informing clinicians and manufacturers of the emerging needs and requirements of this diverse patient population. The review highlights current practice and areas of concern and establishes our current knowledge in this field. PMID:25170284

  12. Enteral feeding pumps: efficacy, safety, and patient acceptability.

    PubMed

    White, Helen; King, Linsey

    2014-01-01

    Enteral feeding is a long established practice across pediatric and adult populations, to enhance nutritional intake and prevent malnutrition. Despite recognition of the importance of nutrition within the modern health agenda, evaluation of the efficacy of how such feeds are delivered is more limited. The accuracy, safety, and consistency with which enteral feed pump systems dispense nutritional formulae are important determinants of their use and acceptability. Enteral feed pump safety has received increased interest in recent years as enteral pumps are used across hospital and home settings. Four areas of enteral feed pump safety have emerged: the consistent and accurate delivery of formula; the minimization of errors associated with tube misconnection; the impact of continuous feed delivery itself (via an enteral feed pump); and the chemical composition of the casing used in enteral feed pump manufacture. The daily use of pumps in delivery of enteral feeds in a home setting predominantly falls to the hands of parents and caregivers. Their understanding of the use and function of their pump is necessary to ensure appropriate, safe, and accurate delivery of enteral nutrition; their experience with this is important in informing clinicians and manufacturers of the emerging needs and requirements of this diverse patient population. The review highlights current practice and areas of concern and establishes our current knowledge in this field.

  13. Numerical simulation on dimension decrease for annular casing of one centrifugal boiler circulation pump

    NASA Astrophysics Data System (ADS)

    Fan, Y. Z.; Zuo, Z. G.; Liu, S. H.; Wu, Y. L.; Sha, Y. J.

    2012-11-01

    Primary formulation derivation indicates that the dimension of one existing centrifugal boiler circulation pump casing is too large. As great manufacture cost can be saved by dimension decrease, a numerical simulation research is developed in this paper on dimension decrease for annular casing of this pump with a specific speed equaling to 189, which aims at finding an appropriately smaller dimension of the casing while hydraulic performance and strength performance will hardly be changed according to the requirements of the cooperative company. The research object is one existing centrifugal pump with a diffuser and a semi-spherical annular casing, working as the boiler circulation pump for (ultra) supercritical units in power plants. Dimension decrease, the modification method, is achieved by decreasing the existing casing's internal radius (marked as "Ri0") while keeping the wall thickness. The research analysis is based on primary formulation derivation, CFD (Computational Fluid Dynamics) simulation and FEM (Finite Element Method) simulation. Primary formulation derivation estimates that a design casing's internal radius should be less than 0.75 Ri0. CFD analysis indicates that smaller casing with 0.75 Ri0 has a worse hydraulic performance when working at large flow rates and a better hydraulic performance when working at small flow rates. In consideration of hydraulic performance and dimension decrease, an appropriate casing's internal radius is determined, which equals to 0.875 Ri0. FEM analysis then confirms that modified pump casing has nearly the same strength performance as the existing pump casing. It is concluded that dimension decrease can be an economical method as well as a practical method for large pumps in engineering fields.

  14. Experimental Study on Coal Feeding Property of 600MW CFB Boiler

    NASA Astrophysics Data System (ADS)

    Chen, H. P.; Tian, L. N.; Du, Q.; Yang, H. P.; Wang, X. H.; Zhou, K.; Zhang, S. H.

    In the CFB boiler technology, improving the steam parameters can lead to the improvement of power plant efficiency. However, during the process of large scale, there exist some key problems, such as uniformity of coal feeding, it is a major factor which showed great influence on the boiler efficiency, temperature distribution, etc. In the paper, based on the structure of commercial 600MW CFB boiler unit and similarity principle, the experiment-rig was set-up; using hot trace particle injection and thermocouple temperature collection system, the three-dimensional diffusing property of hot trace particle was analyzed by measuring the temperature distribution at different positions under different operating conditions of variant bed material height and fluidized air velocity.

  15. 50. VIEW OF CHEMICAL FEED PUMP HOUSE AND NEUTRALIZATION TANK ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    50. VIEW OF CHEMICAL FEED PUMP HOUSE AND NEUTRALIZATION TANK FOR WASTE WATER TREATMENT LOOKING EAST. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

  16. Electromagnetic Pumps for Conductive-Propellant Feed Systems

    NASA Technical Reports Server (NTRS)

    Markusic, Thomas E.; Polzin, Kurt A.; Dehoyos, Amado

    2005-01-01

    Prototype electromagnetic pumps for use with lithium and bismuth propellants were constructed and tested. Such pumps may be used to pressurize future electric propulsion liquid metal feed systems, with the primary advantages being the compactness and simplicity versus alternative pressurization technologies. Design details for two different pumps are described: the first was designed to withstand (highly corrosive) lithium propellant, and t he second was designed to tolerate the high temperature required to pump liquid bismuth. Both qualitative and quantitative test results are presented. Open-loop tests demonstrated the capability of each device to electromagnetically pump its design propellant (lithium or bismuth). A second set of tests accurately quantified the pump pressure developed as a function of current. These experiments, which utilized a more easily handled material (gallium), demonstrated continuously-adjustable pump pressure levels ranging from 0-100 Torr for corresponding input current levels of 0-75 A. While the analysis and testing in this study specifically targeted lithium and bismuth propellants, the underlying design principles should be useful in implementing liquid metal pumps in any conductive-propellant feed system.

  17. Sucking pump activity in feeding behaviour regulation in carpenter ants.

    PubMed

    Falibene, Agustina; Gontijo, Alberto de Figueiredo; Josens, Roxana

    2009-06-01

    Modulation of liquid feeding-rate would allow insects to ingest more food in the same time when this was required. Ants can vary nectar intake rate by increasing sucking pump frequency according to colony requirements. We analysed electrical signals generated by sucking pump activity of ants during drinking solutions of different sucrose concentrations and under different carbohydrate-deprivation levels. Our aim was to define parameters that characterize the recordings and analyse their relationship with feeding behaviour. Signals showed that the initial and final frequencies of sucking pump activity, as well as the difference between them were higher in sugar-deprived ants. However, these parameters were not influenced by sucrose solution concentration, which affected the number of pump contractions and the volume per contraction. Unexpectedly, we found two different responses in feeding behaviour of starved and non-starved ants depending on concentration. Starved ants drank dilute solutions for the same length of time as non-starved ants but ingested higher volumes. While drinking the concentrated solutions, starved ants drank the same volume, but did so in a shorter time than the non-starved ones. Despite these differences, for each analysed concentration the total number of pump contractions remained constant independently of sugar-deprivation level. These results are discussed in the frame of feeding regulation and decision making in ant foraging behaviour.

  18. Electromagnetic Pumps for Conductive-Propellant Feed Systems

    NASA Technical Reports Server (NTRS)

    Markusic, T. E.; Polzin, K. A.

    2005-01-01

    There has been a recent, renewed interest in high-power electric thrusters for application in nuclear-electric propulsion systems. Two of the most promising thrusters utilize liquid metal propellants: the lithium-fed magnetoplasmadynamic thruster and the bismuth-fed Hall thruster. An important element of part of the maturation of these thrusters will be the development of compact, reliable conductive-propellant feed system components. In the present paper we provide design considerations and experimental calibration data for electromagnetic (EM) pumps. The role of an electromagnetic pump in a liquid metal feed system is to establish a pressure gradient between the propellant reservoir and the thruster - to establish the requisite mass flow rate. While EM pumps have previously been used to a limited extent in nuclear reactor cooling loops, they have never been implemented in electric propulsion (EP) systems. The potential benefit of using EM pumps for EP are reliability (no moving parts) and the ability to precisely meter the propellant flow rate. We have constructed and tested EM pumps that use gallium, lithium, and bismuth propellants. Design details, test results (pressure developed versus current), and material compatibility issues are reported. It is concluded that EM pumps are a viable technology for application in both laboratory and flight EP conductive-propellant feed systems.

  19. Optimisation of the parameters of a pump chamber for solid-state lasers with diode pumping by the optical boiler method

    SciTech Connect

    Kiyko, V V; Kislov, V I; Ofitserov, E N; Suzdal'tsev, A G

    2015-06-30

    A pump chamber of the optical boiler type for solid-state lasers with transverse laser diode pumping is studied theoretically and experimentally. The pump chamber parameters are optimised using the geometrical optics approximation for the pump radiation. According to calculations, the integral absorption coefficient of the active element at a wavelength of 808 nm is 0.75 – 0.8 and the relative inhomogeneity of the pump radiation distribution over the active element volume is 17% – 19%. The developed pump chamber was used in a Nd:YAG laser. The maximum cw output power at a wavelength of 1064 nm was ∼480 W at the optical efficiency up to 19.6%, which agrees with theoretical estimates. (lasers)

  20. Renewable wood fuel: Fuel feed system for a pulverized coal boiler. Final report

    SciTech Connect

    1996-01-01

    This report evaluates a pilot test program conducted by New York State Gas & Electric Corporation to evaluate the feasibility of co-firing a pulverized coal plant with renewable wood fuels. The goal was to establish that such a co-firing system can reduce air emissions while maintaining good operational procedures and cost controls. The test fuel feed system employed at Greenidge Station`s Boiler 6 was shown to be effective in feeding wood products. Emission results were promising and an economic analysis indicates that it will be beneficial to pursue further refinements to the equipment and systems. The report recommends further evaluation of the generation and emission impacts using woods of varied moisture contents and at varied Btu input rates to determine if a drying system would be a cost-effective option.

  1. Optimization of regimes for the feed of highly concentrated culm-anthracite coal dust for burning in a TPP-210A boiler

    SciTech Connect

    L.V. Golyshev; G.A. Dovgoteles

    2007-05-15

    Results are presented for regime adjustment of feed systems for a TPP-210A boiler for the burning of highly concentrated culm-anthracite coal dust. As compared with nonoptimal regimes, optimal regimes of high-concentration-feed systems improve the economy of the boiler by 1.7% on average.

  2. Cavitation tests with feed pump PN-1500-350

    SciTech Connect

    Chegurko, L.E.; Churbakova, G.I.; Gavrilova, V.M.; Vasil'ev, V.A.

    1984-05-01

    At the Ural Branch of the All-Union Thermotechnical Institute, the cavitation characteristics of the seven stage feed pump PN-1500-350 were obtained and analyzed. The pressure at the inlet was changed by a valve while the feed, the rotational frequency of the rotor, and the water temperature remained constant. In the tests of the pump, constant feed was ensured with the aid of a control valve, and water was not extracted from the first stage. By changing the pressure at the inlet with unchanged feed, determination was made of the permissible cavitation margin, marking the appearance of low-frequency vibrations of the rotor and a change of the amplitude of the pressure pulsations. The tests showed that when the cavitation margin is reduced to approximately 60m, the head of the first stage and the efficiency of the pump remained practically unchanged. The lowest possible pressure at the pump inlet was determined from the appearance of vibrations for axial shift. To this minimum pressure at the inlet correspond the cavitation margins of 67.6, 71.8, 72.3 and 73.3 m. The theoretical minimal permissible cavitation margin was determined by Rudnev's formula.

  3. 39. (Credit JTL) Interior of boiler room looking east; boiler ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    39. (Credit JTL) Interior of boiler room looking east; boiler casing in background, boiler feedwater pumps and feedwater heater in middle ground; hot well on columns in left foreground. Steam lines from boilers to high service engines pass overhead. - McNeil Street Pumping Station, McNeil Street & Cross Bayou, Shreveport, Caddo Parish, LA

  4. Interior view of boiler house looking south. Boiler units are ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Interior view of boiler house looking south. Boiler units are on left. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

  5. A microfluidic two-pump system inspired by liquid feeding in mosquitoes

    NASA Astrophysics Data System (ADS)

    Marino, Andrew; Goad, Angela; Stremler, Mark; Socha, John; Jung, Sunghwan

    Mosquitoes feed on nectar and blood using a two-pump system in the head-a smaller cibarial pump in line with a larger a pharyngeal pump, with a valve in between. To suck, mosquitoes transport the liquid (which may be a multi-component viscous fluid, blood) through a long micro-channel, the proboscis. In the engineering realm, microfluidic devices in biomedical applications, such as lab-on-a-chip technology, necessitate implementing a robust pump design to handle clogging and increase flow control compared to a single-pump system. In this talk, we introduce a microfluidic pump design inspired by the mosquito's two-pump system. The pumping performance (flow rate) in presence of impurities (air bubbles, soft clogs) is quantified as a function of phase difference and volume expansion of the pumps, and the elasticity of the valve.

  6. Cyclone performance; The key to feed utilization in circulating fluidized bed boilers

    SciTech Connect

    Tsao, T.R.; Herb, B.E.; Lewnard, J.J.; Wang, S.I. )

    1992-01-01

    High utilization of coal and limestone feedstock in circulating fluidized bed (CFB) combustors is critical to minimize operating costs and solid waste generation. Pilot-scale test results typically indicate 50% calcium utilization (Ca/S = 1:1) and greater than 99% carbon burnout. Recent performance data taken for Stockton CFB indicates that a large fraction of the unburned carbon and unreacted limestone escapes the boiler with the fly ash particles smaller than 100 {mu}m in size. This observation was explained by the short residence times of fine particles in the CFB boiler. An analysis of the CFB system suggests that this problem is caused by the inability of the cyclone to capture smaller particles and return them to the boiler to be more completely utilized. This paper reports that a sensitivity study revealed that feedstock utilization is sensitive to cyclone grade efficiency for small particle sizes. in addition, the results show how bed particle size, fly-bottom ash split, solids recirculation rate, and heat transfer in CFB's are affected by cyclone performance.

  7. Micro-feeding and dosing of powders via a small-scale powder pump.

    PubMed

    Besenhard, M O; Fathollahi, S; Siegmann, E; Slama, E; Faulhammer, E; Khinast, J G

    2017-03-15

    Robust and accurate powder micro-feeding (<100mg/s) and micro-dosing (<5 mg) are major challenges, especially with regard to regulatory limitations applicable to pharmaceutical development and production. Since known micro-feeders that yield feed rates below 5mg/s use gravimetric feeding principles, feed rates depend primarily on powder properties. In contrast, volumetric powder feeders do not require regular calibration because their feed rates are primarily determined by the feeder's characteristic volume replacement. In this paper, we present a volumetric micro-feeder based on a cylinder piston system (i.e., a powder pump), which allows accurate micro-feeding and feed rates of a few grams per hours even for very fine powders. Our experimental studies addressed the influence of cylinder geometries, the initial conditions of bulk powder, and the piston speeds. Additional computational studies via Discrete Element Method simulations offered a better understanding of the feeding process, its possible limitations and ways to overcome them. The powder pump is a simple yet valuable tool for accurate powder feeding at feed rates of several orders of magnitude.

  8. Stress Corrosion Cracking of SA-543 High-Strength Steel in All-Volatile Treatment Boiler Feed Water

    NASA Astrophysics Data System (ADS)

    Rihan, R.; Basha, M.; Al-Meshari, A.; Bayramov, A.; van Zyl, G.; Dafalla, H.; Mohamed, A. I.

    2015-10-01

    Susceptibility of SA-543 steel, its welds (with and without stress relief treatment), and the heat-affected zone (HAZ) to stress corrosion cracking (SCC) was investigated in de-aerated and aerated boiler feed water subjected to the all-volatile treatment (AVT-BFW), and distilled water at 275 °C using the slow strain rate testing (SSRT) technique. The SSRT specimens were tested at three extension rates (3.50 × 10-6, 9.00 × 10-6, and 7.50 × 10-5 mm/s) using a novel SCC testing rig capable of testing at high temperatures and pressures. There are no significant differences in the time-to-failure among the four tested specimens. The elongation of the specimens at the time of failure is in the range of 10-23%. The reduction of the cross-sectional area of the failed specimens is large (45-77%) and the absence of any signs of intergranular propagation in fractured specimens, determined by scanning electron microscopy, indicates that the failure is due to mechanical load and not due to SCC. Dissolved oxygen does not affect the susceptibility of the specimens to SCC, which could be due to the inhibition effect of the test solution. SA-543 steel as the base metal, its welds (with and without stress relief treatment), and the HAZ are suitable for use in hot AVT-BFW and distilled water.

  9. Reflux Incidence among Exclusively Breast Milk Fed Infants: Differences of Feeding at Breast versus Pumped Milk

    PubMed Central

    Yourkavitch, Jennifer; Zadrozny, Sabrina; Flax, Valerie L.

    2016-01-01

    The practice of feeding infants expressed breast milk is increasing in the United States, but the impacts on infant and maternal health are still understudied. This study examines the monthly incidence of regurgitation (gastro-esophageal reflux) in exclusively breast milk fed infants from ages two to six months. Among infants whose mothers participated in the Infant Feeding Practices II Study (IFPS II; 2005–2007), data on reflux and feeding mode were collected by monthly questionnaires. A longitudinal, repeated measures analysis was used, with feeding mode lagged by one month in order to compare reflux incidence among infants fed directly at the breast to infants receiving pumped breast milk. Mothers in both feeding groups had similar characteristics, although a greater proportion feeding at least some pumped milk were primiparous. The number of exclusively breastfed infants decreased steadily between months 2 and 6, although the proportion fed at the breast remained similar over time. An association between feeding mode and reflux incidence was not found; however, the analyses were limited by a small number of reported reflux cases. More studies are needed to further explain the relationship between different feeding modes and infant reflux. PMID:27754430

  10. Reflux Incidence among Exclusively Breast Milk Fed Infants: Differences of Feeding at Breast versus Pumped Milk.

    PubMed

    Yourkavitch, Jennifer; Zadrozny, Sabrina; Flax, Valerie L

    2016-10-14

    The practice of feeding infants expressed breast milk is increasing in the United States, but the impacts on infant and maternal health are still understudied. This study examines the monthly incidence of regurgitation (gastro-esophageal reflux) in exclusively breast milk fed infants from ages two to six months. Among infants whose mothers participated in the Infant Feeding Practices II Study (IFPS II; 2005-2007), data on reflux and feeding mode were collected by monthly questionnaires. A longitudinal, repeated measures analysis was used, with feeding mode lagged by one month in order to compare reflux incidence among infants fed directly at the breast to infants receiving pumped breast milk. Mothers in both feeding groups had similar characteristics, although a greater proportion feeding at least some pumped milk were primiparous. The number of exclusively breastfed infants decreased steadily between months 2 and 6, although the proportion fed at the breast remained similar over time. An association between feeding mode and reflux incidence was not found; however, the analyses were limited by a small number of reported reflux cases. More studies are needed to further explain the relationship between different feeding modes and infant reflux.

  11. Randomised trial comparing hand expression with breast pumping for mothers of term newborns feeding poorly

    PubMed Central

    Flaherman, Valerie J; Gay, Barbara; Scott, Cheryl; Avins, Andrew; Lee, Kathryn A; Newman, Thomas B

    2016-01-01

    Objective Breast pumping or hand expression may be recommended when newborns latch or suck poorly. A recent trial found worse outcomes among mothers who used a breast pump in the early postpartum period. The objective of this study was to compare bilateral electric breast pumping to hand expression among mothers of healthy term infants feeding poorly at 12–36 h after birth. Design Randomised controlled trial. Setting Well-baby nursery and postpartum unit. Patients 68 mothers of newborns 12–36 h old who were latching or sucking poorly were randomly assigned to either 15 min of bilateral electric pumping or 15 min of hand expression. Mainoutcome measures Milk transfer, maternal pain, breastfeeding confidence and breast milk expression experience (BMEE) immediately after the intervention, and breastfeeding rates at 2 months after birth. Results The median volume of expressed milk (range) was 0.5 (0–5) ml for hand expressing mothers and 1 (0–40) ml for pumping mothers (p=0.07). Maternal pain, breastfeeding confidence and BMEE did not differ by intervention. At 2 months, mothers assigned to hand expression were more likely to be breastfeeding (96.1%) than mothers assigned to breast pumping (72.7%) (p=0.02). Conclusions Hand expression in the early postpartum period appears to improve eventual breastfeeding rates at 2 months after birth compared with breast pumping, but further research is needed to confirm this. However, in circumstances where either pumping or hand expression would be appropriate for healthy term infants 12–36 h old feeding poorly, providers should consider recommending hand expression. PMID:21747129

  12. Interior view of boiler house looking north. Boiler units are ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Interior view of boiler house looking north. Boiler units are on right. HAER Engineer/Historian Donald C. Jackson on right is interviewing Garry Dobbins concerning operation of the facility. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

  13. Application of a method for calculating coal quantity feed into boiler for double inlet and outlet ball mill in the coordinated control system

    NASA Astrophysics Data System (ADS)

    Chen, Houtao; Wang, Xihui; Wang, Zhijie; Peng, Liang

    2017-05-01

    Accuracy of the measurement of coal quantity feed into the boiler furnace has great influence on the combustion and coordinated control of power plant. According to the characteristics of double inlet and outlet mill pulverizing system, the method of calculating the amount of coal into furnace using the correlated variable was presented. On this basis, the coordinated control system was designed. Running results show that the method of calculating the fuel quantity accurately and effectively guarantee the stability of coordinated control system. It has a high adjustment quality.

  14. Feed-pump hydraulic performance and design improvement, Phase I: research program design. Final report

    SciTech Connect

    Brown, W.H.; Gopalakrishnan, S.; Fehlau, R.; Thompson, W.E.; Wilson, D.G.

    1982-03-01

    As a result of prior EPRI-sponsored studies, it was concluded that a research program should be designed and implemented to provide an improved basis for the design, procurement, testing, and operation of large feed pumps with increased reliability and stability over the full range of operating conditions. This two-volume report contains a research plan which is based on a review of the present state of the art and which defines the necessary R and D program and estimates the benefits and costs of the program. The recommended research program consists of 30 interrelated tasks. It is designed to perform the needed research; to verify the results; to develop improved components; and to publish computer-aided design methods, pump specification guidelines, and a troubleshooting manual. Most of the technology proposed in the research plan is applicable to nuclear power plants as well as to fossil-fired plants. This volume discusses the design, performance and failures of feed pumps, and recommendations for research on pump dynamics, design, and specifications.

  15. Pump instability phenomena generated by fluid forces

    NASA Technical Reports Server (NTRS)

    Gopalakrishnan, S.

    1985-01-01

    Rotor dynamic behavior of high energy centrifugal pumps is significantly affected by two types of fluid forces; one due to the hydraulic interaction of the impeller with the surrounding volute or diffuser and the other due to the effect of the wear rings. The available data on these forces is first reviewed. A simple one degree-of-freedom system containing these forces is analytically solved to exhibit the rotor dynamic effects. To illustrate the relative magnitude of these phenomena, an example of a multistage boiler feed pump is worked out. It is shown that the wear ring effects tend to suppress critical speed and postpone instability onset. But the volute-impeller forces tend to lower the critical speed and the instability onset speed. However, for typical boiler feed pumps under normal running clearances, the wear ring effects are much more significant than the destabilizing hydraulic interaction effects.

  16. Feed-pump hydraulic performance and design improvement, Phase I: research program design. Final report

    SciTech Connect

    Brown, W.H.; Gopalakrishnan, S.; Fehlau, R.; Thompson, W.E.; Wilson, D.G.

    1982-03-01

    As a result of prior EPRI-sponsored studies, it was concluded that a research program should be designed and implemented to provide an improved basis for the design, procurement, testing, and operation of large feed pumps with increased reliability and stability over the full range of operating conditions. This two-volume report contains a research plan which is based on a review of the present state of the art and which defines the necessary R and D program and estimates the benefits and costs of the program. The recommended research program consists of 30 interrelated tasks. It is designed to perform the needed research; to verify the results; to develop improved components; and to publish computer-aided design methods, pump specification guidelines, and a troubleshooting manual. Most of the technology proposed in the research plan is applicable to nuclear power plants as well as to fossil-fired plants. This volume contains appendixes on pump design, cavitation damage, performance testing, hydraulics, two-phase flow in pumps, flow stability, and rotor dynamics.

  17. Effects of macrocyclic lactone anthelmintics on feeding and pharyngeal pumping in Trichostrongylus colubriformis in vitro.

    PubMed

    Sheriff, J C; Kotze, A C; Sangster, N C; Martin, R J

    2002-11-01

    The effects of macrocyclic lactone anthelmintics (MLs) on feeding by Trichostrongylus colubriformis nematodes in vitro were examined using inulin uptake as a measure of ingestion and electropharyngeograms as a record of the electrical events associated with pharyngeal pumping. Inulin uptake was inhibited by the 4 MLs tested (EC50s 0.045-4.57 nM), with an order of potency of eprinomectin (most potent), ivermectin, ivermectin monosaccharide, and ivermectin aglycone. The MLs caused both the frequency and amplitude of pharyngeal electrical events to decrease. In individual worms the inhibition of pump frequency preceded the inhibition of pump amplitude. The order of potency of the MLs as inhibitors of frequency was ivermectin aglycone, ivermectin, ivermectin monosaccharide and eprinomectin. The difference compared with the inulin assay results are probably due to the dynamics of drug uptake in the two systems. It was possible that the nematodes in the electrophysiology experiments were effectively orally ligated by enclosure of the worm's head in the recording pipette which contained no drug. Despite this difference in relative potencies, both the ingestion assays and the electrical events indicate that MLs are potent inhibitors of the pharynx in T. colubriformis in vitro. The sequence of effects on pharyngeal electrical activity suggests that ML action involves an initial inhibitory effect on the rate of pharyngeal contractions, followed by a decrease in the amplitude of the potentials associated with pharyngeal pumping events.

  18. Active magnetic bearings: As applied to centrifugal pumps

    NASA Astrophysics Data System (ADS)

    Nelik, Lev; Cooper, Paul; Jones, Graham; Galecki, Dennis; Pinckney, Frank; Kirk, Gordon

    1992-05-01

    Application of magnetic bearings to boiler feed pumps presents various attractive features, such as longer bearing life, lower maintenance costs, and improved operability through control of the rotordynamics. Magnetic bearings were fitted to an eight-stage, 600 hp boiler feed pump, which generates 2600 ft of heat at 680 gpm and 3560 rpm. In addition to the varied and severe operating environment in steady state operation of this pump in a power plant, it is also subjected to transient loads during frequent starts and stops. These loads can now be measured by the in-built instrumentation of the magnetic bearings. Following site installation, a follow-up bearing tune-up was performed, and pump transient response testing was conducted. The bearing response was completely satisfactory, ensuring trouble-free pump operation even in the range of reduced load. The experience gained so far through design and testing proves feasibility of magnetic bearings for boiler feed pumps, which sets the stage for application of even higher energy centrifugal pumps equipped with magnetic bearings.

  19. Active magnetic bearings: As applied to centrifugal pumps

    NASA Technical Reports Server (NTRS)

    Nelik, Lev; Cooper, Paul; Jones, Graham; Galecki, Dennis; Pinckney, Frank; Kirk, Gordon

    1992-01-01

    Application of magnetic bearings to boiler feed pumps presents various attractive features, such as longer bearing life, lower maintenance costs, and improved operability through control of the rotordynamics. Magnetic bearings were fitted to an eight-stage, 600 hp boiler feed pump, which generates 2600 ft of heat at 680 gpm and 3560 rpm. In addition to the varied and severe operating environment in steady state operation of this pump in a power plant, it is also subjected to transient loads during frequent starts and stops. These loads can now be measured by the in-built instrumentation of the magnetic bearings. Following site installation, a follow-up bearing tune-up was performed, and pump transient response testing was conducted. The bearing response was completely satisfactory, ensuring trouble-free pump operation even in the range of reduced load. The experience gained so far through design and testing proves feasibility of magnetic bearings for boiler feed pumps, which sets the stage for application of even higher energy centrifugal pumps equipped with magnetic bearings.

  20. Active magnetic bearings: As applied to centrifugal pumps

    NASA Technical Reports Server (NTRS)

    Nelik, Lev; Cooper, Paul; Jones, Graham; Galecki, Dennis; Pinckney, Frank; Kirk, Gordon

    1992-01-01

    Application of magnetic bearings to boiler feed pumps presents various attractive features, such as longer bearing life, lower maintenance costs, and improved operability through control of the rotordynamics. Magnetic bearings were fitted to an eight-stage, 600 hp boiler feed pump, which generates 2600 ft of heat at 680 gpm and 3560 rpm. In addition to the varied and severe operating environment in steady state operation of this pump in a power plant, it is also subjected to transient loads during frequent starts and stops. These loads can now be measured by the in-built instrumentation of the magnetic bearings. Following site installation, a follow-up bearing tune-up was performed, and pump transient response testing was conducted. The bearing response was completely satisfactory, ensuring trouble-free pump operation even in the range of reduced load. The experience gained so far through design and testing proves feasibility of magnetic bearings for boiler feed pumps, which sets the stage for application of even higher energy centrifugal pumps equipped with magnetic bearings.

  1. 32. (Credit CBF) Boilers in the McNeil Street Station, November ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    32. (Credit CBF) Boilers in the McNeil Street Station, November 1911: two 100 hp Atlas boilers and one Chattanooga boiler. The Atlas boilers were installed c1892, the Chattanooga boiler c1897. - McNeil Street Pumping Station, McNeil Street & Cross Bayou, Shreveport, Caddo Parish, LA

  2. 1. VIEW TO EAST, WITH BOILER HOUSE TO LEFT, FILTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW TO EAST, WITH BOILER HOUSE TO LEFT, FILTH HOIST HOUSE TO RIGHT, WITH ENGINE HOUSE AT RIGHT REAR. - Providence Sewage Treatment System, Ernest Street Pumping Station, Boiler House, Ernest Street & Allens Avenue, Providence, Providence County, RI

  3. 3. NORTH ELEVATION OF BOILER HOUSE; PARTIAL NORTH ELEVATION OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. NORTH ELEVATION OF BOILER HOUSE; PARTIAL NORTH ELEVATION OF ENGINE HOUSE, LEFT REAR. - Providence Sewage Treatment System, Ernest Street Pumping Station, Boiler House, Ernest Street & Allens Avenue, Providence, Providence County, RI

  4. 2012 International Conference on Medical Physics and Biomedical Engineering Thermal Economic Analysis on LiBr Refrigeration -Heat Pump System Applied in CCHP System

    NASA Astrophysics Data System (ADS)

    Zhang, CuiZhen; Yang, Mo; Lu, Mei; Zhu, Jiaxian; Xu, Wendong

    LiBr refrigeration cooling water contains a lot of low-temperature heat source, can use this part of the heat source heat boiler feed water. This paper introduced LiBr refrigeration - heat pump system which recovery heat of the LiBr refrigeration cooling water by heat pump system to heat the feed water of boiler. Hot economic analysis on the system has been performed based on the experimental data. Results show that LiBr refrigeration-heat pump system brings 26.6 percent decrease in primary energy rate consumption comparing with the combined heat and power production system(CHP) and separate generation of cold;

  5. Economic evaluation of utilization of electro-feed water pump and turbo-feed water pump and compare them in a 12.5-megawatts steam unit thermal cycle and provide the optimum solution

    NASA Astrophysics Data System (ADS)

    Safaiy, M. R.; Maghmoumi, Y.; Karimipour, A.

    2012-06-01

    Nowadays due to valuability of electrical energy and high production costs that is spent on its production should be more accurate in electricity production. In a steam unit typically between 5 to 8 percent of electric power production will be spent on internal consumption. In this paper, One of strategies of reducing internal consumption and increase efficiency and net production has been studied. The purpose of this study was comparison between the electromotor and turbine as driving feed pump of three aspects of the efficiency driving, the efficiency of steam unit at work of any one of them and costs. Study showed that turbo-feed pump is more efficient than a electro-feed pump.

  6. Review and Assessment of Commercial Vendors/Options for Feeding and Pumping Biomass Slurries for Hydrothermal Liquefaction

    SciTech Connect

    Berglin, Eric J.; Enderlin, Carl W.; Schmidt, Andrew J.

    2012-11-01

    The National Advanced Biofuels Consortium is working to develop improved methods for producing high-value hydrocarbon fuels. The development of one such method, the hydrothermal liquefaction (HTL) process, is being led by the Pacific Northwest National Laboratory (PNNL). The HTL process uses a wet biomass slurry at elevated temperatures (i.e., 300 to 360°C [570 to 680°F]) and pressures above the vapor pressure of water (i.e., 15 to 20 MPa [2200 to 3000 psi] at these temperatures) to facilitate a condensed-phase reaction medium. The process has been successfully tested at bench-scale and development and testing at a larger scale is required to prove the viability of the process at production levels. Near-term development plans include a pilot-scale system on the order of 0.5 to 40 gpm, followed by a larger production-scale system on the order of 2000 dry metric tons per day (DMTPD). A significant challenge to the scale-up of the HTL process is feeding a highly viscous fibrous biomass wood/corn stover feedstock into a pump system that provides the required 3000 psi of pressure for downstream processing. In October 2011, PNNL began investigating commercial feed and pumping options that would meet these HTL process requirements. Initial efforts focused on generating a HTL feed and pump specification and then providing the specification to prospective vendors to determine the suitability of their pumps for the pilot-scale and production-scale plants. Six vendors were identified that could provide viable equipment to meet HTL feed and/or pump needs. Those six vendors provided options consisting three types of positive displacement pumps (i.e., diaphragm, piston, and lobe pumps). Vendors provided capabilities and equipment related to HTL application. This information was collected, assessed, and summarized and is provided as appendices to this report.

  7. Pump

    SciTech Connect

    Johnson, J.W.; Abdul.Hye, A.B.M.

    1983-10-25

    A pump for injecting chemicals into a well employs a pivot arm for synchronous movement with a well pump. The pivot arm causes reciprocation of a plunger within the body of the chemical pump. The plunger, during its upward stroke causes the entry of chemicals from an outside source into the pump body and, during its downward stroke, causes the exiting of the chemicals into the well. (2 claims.

  8. Tdp studies and tests for C. A. Energia Electrica de Venezuela (enelven) at planta ramon laguna, units RL-17 and RL-10. Volume 2. Unit RL-10 boiler condition assessment report. Export trade information

    SciTech Connect

    Not Available

    1991-03-28

    The study, conducted by Babcock and Wilcox, was funded by the U.S. Trade and Development agency on behalf of Enelven. In order to maximize generated power output and minimize operating costs at Planta Ramon Laguna, tests were done to evaluate the condition of equipment at the plant. In order to identify any damage and determine the operating output of each unit, assessments were done of the furnaces, boilers, generators and boiler feed pumps being used in the plant. The report presents the results of these tests. This is the second of three volumes and it includes the following section: (1) Condition Assessment of Unit RL-10 Boiler.

  9. Structural and physical determinants of the proboscis-sucking pump complex in the evolution of fluid-feeding insects.

    PubMed

    Kornev, Konstantin G; Salamatin, Arthur A; Adler, Peter H; Beard, Charles E

    2017-07-26

    Fluid-feeding insects have evolved a unique strategy to distribute the labor between a liquid-acquisition device (proboscis) and a sucking pump. We theoretically examined physical constraints associated with coupling of the proboscis and sucking pump into a united functional organ. Classification of fluid feeders with respect to the mechanism of energy dissipation is given by using only two dimensionless parameters that depend on the length and diameter of the proboscis food canal, maximum expansion of the sucking pump chamber, and chamber size. Five species of Lepidoptera - White-headed prominent moth (Symmerista albifrons), White-dotted prominent moth (Nadata gibosa), Monarch butterfly (Danaus plexippus), Carolina sphinx moth (Manduca sexta), and Death's head sphinx moth (Acherontia atropos) - were used to illustrate this classification. The results provide a rationale for categorizing fluid-feeding insects into two groups, depending on whether muscular energy is spent on moving fluid through the proboscis or through the pump. These findings are relevant to understanding energetic costs of evolutionary elaboration and reduction of the mouthparts and insect diversification through development of new habits by fluid-feeding insects in general and by Lepidoptera in particular.

  10. 22. (Credit JTL) Detail, south elevation of boiler room; view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. (Credit JTL) Detail, south elevation of boiler room; view looking NNW at Adolphous Custodis stack base (1900), boiler room doors, boiler backheads and edge of old high service pump room. Note joint in bricks to right of Poller room doors showing extent of wall replacement when doors were installed. - McNeil Street Pumping Station, McNeil Street & Cross Bayou, Shreveport, Caddo Parish, LA

  11. 35. VIEW LOOKING EAST IN SOUTH END OF EAST BOILER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    35. VIEW LOOKING EAST IN SOUTH END OF EAST BOILER ROOM. CYLINDRICAL TANKS ARE WORTHINGTON DEAERATORS. THESE REMOVED AIR FROM BOILER FEED WATER TO MINIMIZE CORROSION AND PITTING OF THE BOILER TUBES. AIR REMOVAL ALSO HELPED AVOID THE FORMATION OF FOAM IN THE SYSTEM. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  12. PUMPS

    DOEpatents

    Thornton, J.D.

    1959-03-24

    A pump is described for conveving liquids, particure it is not advisable he apparatus. The to be submerged in the liquid to be pumped, a conduit extending from the high-velocity nozzle of the injector,and means for applying a pulsating prcesure to the surface of the liquid in the conduit, whereby the surface oscillates between positions in the conduit. During the positive half- cycle of an applied pulse liquid is forced through the high velocity nozzle or jet of the injector and operates in the manner of the well known water injector and pumps liquid from the main intake to the outlet of the injector. During the negative half-cycle of the pulse liquid flows in reverse through the jet but no reverse pumping action takes place.

  13. Slurry pumping techniques for feeding high-pressure coal gasification reactors

    NASA Technical Reports Server (NTRS)

    Bair, W. G.; Tarman, P. B.

    1977-01-01

    Operating experience in pumping coal and coal char slurries at pressures up to 1500 psig is discussed. The design specifications for the mixing tanks, pumps, piping, and slurry heaters are given along with pressure drop and minimum flow velocity data on water-lignite slurries.

  14. 36. VIEW OF SOUTH END OF EAST BOILER ROOM LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    36. VIEW OF SOUTH END OF EAST BOILER ROOM LOOKING SOUTHWEST. THE CYLINDRICAL TANKS IN THE FOREGROUND CONTAIN AN ION-EXCHANGE RESIN FOR REMOVING CALCIUM FROM THE BOILER FEED TO REDUCE WATER "HARDNESS". THE SHALLOW TANK IN THE RIGHT BACKGROUND IS A DIATOMACEOUS EARTH FILTER TO REMOVE PARTICULATE MATTER FROM THE BOILER FEED. THE ION-EXCHANGE WATER SOFTENING SYSTEM WAS INSTALLED IN 1977. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  15. New options for pumps and tubes: progress in enteral feeding techniques and devices.

    PubMed

    Varella, L D; Young, R J

    1999-07-01

    In the past, blenderized tube feeds prepared in the hospital kitchen were delivered by bolus or gravity at intervals of 4-6 h. These methods lack consistent steady flow and many times are not a safe mode of delivery for those at risk of vomiting and aspiration, and cause more patient discomfort than nutritional benefit. More recently, enteral feeding administration techniques and devices have been developed for the delivery of commercially prepared enteral formulas designed for specific disease states. These technological advances have improved enteral feeding practices.

  16. Downhole liquid trap for a geothermal pumping system

    SciTech Connect

    Aplenc, A.M.

    1984-05-15

    In a geothermal energy conversion system having a boiler and a turbine driven pumping unit, a separator is disposed between the boiler and the turbine driven pump for separating entrained liquid droplets from the vaporized working fluid exhausted from the boiler.

  17. 16. Boiler room, view looking east showing three, four pass ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Boiler room, view looking east showing three, four pass horizontal Cleaver Brooks Package Boilers, 1-150 H.P. and 2-200 H.P., 6900 lbs/hour and 5175 lbs/hour, 200 PSI - East Boston Pumping Station, Chelsea Street at Chelsea Creek, Boston, Suffolk County, MA

  18. Looking north from inside of the boiler house on the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking north from inside of the boiler house on the top floor at the former power house (current river pump house) and the northern end of the plant. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  19. View of steam powered air compressor in boiler house. Gas ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of steam powered air compressor in boiler house. Gas engine powered electric generators are visible in far left background. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

  20. Exterior view of boiler house looking southwest with steam exhaust ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Exterior view of boiler house looking southwest with steam exhaust vents in foreground. Engine house is on left. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

  1. General view looking north showing boilers with units 47 and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General view looking north showing boilers with units 47 and 48 in right foreground. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

  2. INTERIOR OF BOILER BUILDING, FIRST LEVEL, EAST SIDE, SHOWING STEAMDRIVEN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    INTERIOR OF BOILER BUILDING, FIRST LEVEL, EAST SIDE, SHOWING STEAM-DRIVEN PISTON PUMPS FOR FUEL OIL, CAMERA FACING EAST. - New Haven Rail Yard, Central Steam Plant and Oil Storage, Vicinity of Union Avenue, New Haven, New Haven County, CT

  3. Stamet solids pump feeds coal into 210 psig in a DOE supported project

    SciTech Connect

    Hay, A.; Bonk, D.L.

    1995-12-31

    This paper summarizes the efforts of Stamet, Incorporated, and the U.S. Department of Energy (DOE) to produce an innovative feed system for pressurized combustion power systems. DOE has been fostering the development of pressurized fluidized-bed combustion power systems which are 45 percent efficient and can deliver electricity at 20 percent below the cost of conventional power systems. A major capital cost factor in pressurized systems is the coal and limestone feed systems. DOE has been attempting to reduce the capital and operating cost of these components for a number of years. In 1995, Stamet, Incorporated, completed a 2-year Small Business Innovative Research grant from DOE and produced a precision metering feeder capable of delivering coal into a vessel at 210 pounds per square inch, gauge, ({approximately} 14 atmospheres). The feeder is an elegantly simple machine with one moving part. The product provides continuous metering of fuel against pressure with instantaneous rate control.

  4. Stamet solids pump feeds coal into 210 psig in a DOE supported project

    SciTech Connect

    Hay, A.; Bonk, D.L.

    1995-12-31

    This paper summarizes the efforts of Stamet, Incorporated, and the U.S. Department of Energy (DOE) to produce an innovative feed system for pressurized combustion power systems. DOE has been fostering the development of pressurized fluidized-bed combustion power systems which are 45 percent efficient and can deliver electricity at 20 percent below the cost of conventional power systems. A major capital cost factor in pressurized systems is the coal and limestone feed systems. DOE has been attempting to reduce the capital and operating cost of these components for a number of years. In 1995, Stamet, Incorporated, completed a 2-year Small Business Innovative Research grant from DOE and produced a precision metering feeder capable of delivering coal into a vessel at 210 pounds per square inch, gauge, ({approximately}14 atmospheres). The feeder is an elegantly simple machine with one moving part. The product provides continuous metering of fuel against pressure with instantaneous rate control.

  5. 8. VIEW LOOKING NORTH OF WEST BOILER ROOM LUDOWICI TILE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. VIEW LOOKING NORTH OF WEST BOILER ROOM LUDOWICI TILE ROOF. TWO 600,00 GALLON RESERVOIRS FOR BOILER FEED WATER ARE ON THE LEFT CENTER OF THE PHOTOGRAPH. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  6. AUTOMOTIVE REPAIR SHOP, DETAIL OF MILLS COAL BOILER WITH SCREWFEED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    AUTOMOTIVE REPAIR SHOP, DETAIL OF MILLS COAL BOILER WITH SCREW-FEED COAL HOPPER ON RIGHT SIDE, WITH SCALE. - Cedar City Automotive Repair Shop, Automotive Repair Shop, 820 North Main Street, Cedar City, Iron County, UT

  7. AUTOMOTIVE REPAIR SHOP, DETAIL OF MILLS COAL BOILER WITH SCREWFEED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    AUTOMOTIVE REPAIR SHOP, DETAIL OF MILLS COAL BOILER WITH SCREW-FEED COAL HOPPER ON RIGHT SIDE. - Cedar City Automotive Repair Shop, Automotive Repair Shop, 820 North Main Street, Cedar City, Iron County, UT

  8. Sources of education about breastfeeding and breast pump use: what effect do they have on breastfeeding duration? An analysis of the Infant Feeding Practices Survey II.

    PubMed

    Chen, Peggy G; Johnson, Lara W; Rosenthal, Marjorie S

    2012-10-01

    To examine the association between breastfeeding duration and sources of education about breastfeeding and breast pumps. We analyzed data from the Infant Feeding Practices Survey II (n = 2,586), a national longitudinal consumer-based study. We used χ(2) and ANOVA to contrast categorical and continuous variables, respectively, and logistic regression to model the association between breastfeeding duration and sources of education about breastfeeding and breast pump use. In unadjusted results, multiple sources of breastfeeding and breast pump education were significantly associated with breastfeeding duration. However, in multivariable logistic regression models, there was a negative association between longer breastfeeding duration and receiving breast pump education from a physician/physician assistant (OR 0.58, 95% CI 0.36-0.93); and a positive association between longer breastfeeding duration and receiving breastfeeding education from classes/support group (OR: 1.85, 95% CI: 1.24-2.76) and receiving breast pump education from friends/relatives (OR: 1.70, 95% CI: 1.13-2.55). Although healthcare providers such as physicians and nurses have regular contact with women, the only statistically significant association between breastfeeding and breast pump education from healthcare providers and longer breastfeeding duration was a negative one. This likely reflects time and resource limitations of clinical practice, but may also indicate a need for more consistent training for healthcare providers who provide breastfeeding and breast pump education. Social supports, such as education from classes/support groups and friends/relatives demonstrated positive associations with longer breastfeeding duration. This emphasizes the importance of fostering a positive sphere of influence around breastfeeding women. Future work should also investigate alternative levers of action, such as policies affecting insurance coverage of breast pumps.

  9. 51. BOILER ROOM. SMALL BOILER ON LEFT OF UNKNOWN MANUFACTURE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    51. BOILER ROOM. SMALL BOILER ON LEFT OF UNKNOWN MANUFACTURE, WITH INDUCTION MOTORS. HARTLEY BOILER, MONTGOMERY, ALABAMA, ON RIGHT. - Prattville Manufacturing Company, Number One, 242 South Court Street, Prattville, Autauga County, AL

  10. 33. BOILER HOUSE FURNACE AND BOILER Close view of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. BOILER HOUSE - FURNACE AND BOILER Close view of the Dorward Engineering Company furnace and boiler which provided steam to the cooking retorts in the adjacent room. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

  11. [Modulation of Na+,K+-pump activity and Na+,Li+-exchange in rabbit erythrocytes at various stages of cholesterol feeding].

    PubMed

    Makarov, V L

    1995-09-01

    The activities of the Na+,K(+)-pump and the Na+/Li(+)-exchange and the intracellular concentration of Na+ in erythrocytes of rabbits with experimental hypercholesterolemia have been studied at different stages of cholesterol (Ch) feeding as well as at different intervals after stopping of cholesterol-rich diets. After sufficiently long periods of feeding the animals with Ch (1.5-2 months), a significant activation of the Na+,K(+)-pump, reduction of the Na+/Li(+)-exchange rate and lowering of the intracellular sodium content in erythrocytes of rabbits from experimental groups were observed. Several months after stopping Ch-rich diets there was a partial normalization of the parameters under study. However, at the initial stage of the experiment (20 days after the beginning of Ch feeding) as well as two weeks after Ch feeding had been stopped, there occurred no changes in the activities of the ion transport systems or in [Na+]i despite substantial changes in the plasma Ch level. It is suggested that the observed effect of dietary Ch on the activity of ion carriers may be mediated by affecting the expression of the corresponding genes.

  12. New industrial heat pump applications to an integrated thermomechanical pulp and paper mill

    SciTech Connect

    1991-01-01

    Application of pinch technology US industries in an early screening study done by TENSA Services (DOE/ID/12583-1) identified potential for heat pumps in several industrial sectors. Among these, processes with large evaporation units were found to be some of the most promising sectors for advanced heat pump placement. This report summarizes the results of a study for Bowater Incorporated, Carolina Division. The units selected for this study are the thermo-mechanical pulper (TMP), kraft digester, evaporators, boiler feed water (BFW) train and pulp dryer. Based on the present level of operation, the following recommendations are made: 1. Install a mechanical vapor compression (MVR) heat pump between the TMP mill and {number sign}3 evaporator. This heat pump will compress the 22 psig steam from the TMP heat recovery system and use it to replace about 70% of the 60 psig steam required in {number sign} evaporator. The boiler feed water heat losses (in the low pressure deaerator) will be supplied by heat available in the TMR's zero psig vent steam. 2. Study the digester to verify the practicality of installing an MVR heat pump which will compress the dirty weapons from the cyclone separator. The compressed vapors can be directly injected into the digester and thus reduce the 135 psig steam consumption. 31 figs., 9 tabs.

  13. Looking southeast at the conveyor belt and tripper feeding the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking southeast at the conveyor belt and tripper feeding the coal storage hoppers at the top of the boilers. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  14. Looking southeast at the conveyor belt feeding the coal storage ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking southeast at the conveyor belt feeding the coal storage hoppers at the top of the boilers. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  15. Effect of the collector tube profile on Pitot pump performances

    NASA Astrophysics Data System (ADS)

    Komaki, K.; Kanemoto, T.; Sagara, K.; Umekage, T.

    2013-12-01

    The pitot pump is composed of the rotating casing with the impeller channel and the pitot tube type collector as the discharge line. The radial impeller feeds water to the rotating casing. The water rotating together with the casing is caught by the stationary pitot tube type collector, and then discharges to the outside. This type pump, as the extra high head pump, is provided mainly for boiler feed systems, and has been designed by trial and error. To optimize the pump profiles, it is desirable to investigate not only performances but also internal flow conditions. This paper discusses experimentally and numerically the relation between the pump performances and the flow conditions in the rotating casing. The moderately larger dimensions of the collector make the pump head and the discharge high with the higher hydraulic efficiency. The flow in the casing is almost the forced vortex type whose velocity is in proportion to the radius but the core velocity is affected with the drag force of the stationary collector. Based upon the above results, the profile of the pitot tube type collector was optimized with the numerical simulation.

  16. Boiler control systems engineering

    SciTech Connect

    Gilman, J.

    2005-07-01

    The book provides in-depth coverage on how to safely and reliably control the firing of a boiler. Regardless of the capacity or fuel, certain fundamental control systems are required for boiler control. Large utility systems are more complex due to the number of burners and the overall capacity and equipment. This book covers engineering details on control systems and provides specific examples of boiler control including configuration and tuning. References to requirements are based on the 2004 NFPA 85 along with other ISA standards. Detailed chapters cover: Boiler fundamentals including piping and instrument diagrams (P&IDs) and a design basis checklist; Control of boilers, from strategies and bumpless transfer to interlock circuitry and final control elements; Furnace draft; Feedwater; Coal-fired boilers; Fuel and air control; Steam temperature; Burner management systems; Environment; and Control valve sizing. 2 apps.

  17. Boiler saves pollution problem

    SciTech Connect

    Kaiser, J.A.

    1981-02-01

    Monarch Furniture Industries, High Point, N.C. replaced their old locomotive-type boiler in 1978 with a multifuel boiler system from Energy Systems, Inc. of Chattanooga. The system burns the company's wood wastes, supplemented with low-cost coal in winter. It generates 17,250 lbs. per hour of steam, gives a much cleaner burn than the old boiler, and has a calculated payback period of 1.67 years.

  18. Compartment B3, boiler room; showing boiler facing of boiler #5 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Compartment B-3, boiler room; showing boiler facing of boiler #5 aft to forward from passing room B-25. (030A) - USS Olympia, Penn's Landing, 211 South Columbus Boulevard, Philadelphia, Philadelphia County, PA

  19. Detail view of feedwater pump (below) and preheater tanks (above) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail view of feedwater pump (below) and preheater tanks (above) in boiler house. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

  20. 9. RW Meyer Sugar Mill: 18761889. Locomotivetype, firetube, portable boiler, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. RW Meyer Sugar Mill: 1876-1889. Locomotive-type, fire-tube, portable boiler, No. 1 model. Manufactured by Ames Iron Works, Oswego, New York, 1879. 120 lbs/sq. inch working pressure, 66 sq. ft. heating surface in tubes. View: from side. The boiler provided steam for steam engine which in turn powered the mill's centrifugals. The section on the left side included the firebox with its surrounding water-legs. The fluted chimney-type structure is the steam port, safety valve, and whistle. Column projecting from side was part of steam pressure and water gauge. Pipe running above boiler carried steam to the engine. Pipe running below boiler provided the boiler feed-water. Cylindrical section included 22 fire-tube surrounded by water. The far right ... - R. W. Meyer Sugar Mill, State Route 47, Kualapuu, Maui County, HI

  1. Experimental study of a symmetrically-pumped distributed feed-back Erbium-doped fiber laser with a tunable phase shift

    NASA Astrophysics Data System (ADS)

    Barmenkov, Yu O.; Kir'yanov, A. V.; Pérez-Millán, P.; Cruz, J. L.; Andrés, M. V.

    2008-05-01

    We report an experimental study of a symmetrically-pumped distributed feed-back (DFB) Erbium-doped fiber laser (EFL) with a tunable phase shift induced in the center of the laser cavity. The tunable phase shift is produced using a magnetostrictive transducer. We demonstrate that lasing is observed in our experimental arrangement at any value of the phase shift that is owing to a noticeable birefringence induced by the latter. The laser wavelength is shown to periodically change with increasing pump power due to the fiber heating, which stems from the Stokes loss, the excited state absorption and Auger up-conversion in Erbium, and high thermal expansion coefficient of the magnetostrictive transducer.

  2. 68. 1911 BOILER HOUSE LOOKING SOUTH. BOILERS ARE CA. 1945. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    68. 1911 BOILER HOUSE LOOKING SOUTH. BOILERS ARE CA. 1945. SPACE HEATING BOILER S REPLACED ORIGINAL 8 VERTICAL HIGH PRESSURE STEAM POWER BOILERS. THE ORIGINAL SHEET METAL FLUE IS IN THE UPPER CENTER. - Boston Manufacturing Company, 144-190 Moody Street, Waltham, Middlesex County, MA

  3. Super Boiler: Packed Media/Transport Membrane Boiler Development and Demonstration

    SciTech Connect

    Liss, William E; Cygan, David F

    2013-04-17

    50% smaller in footprint, has a smaller diameter, and is up to 50% lower in weight, resulting in very compact design with reduced material cost and labor costs, while requiring less boiler room floor space. For enhanced energy efficiency, the heat recovery system uses a transport membrane condenser (TMC), a humidifying air heater (HAH), and a split-stage economizer to extract maximum energy from the flue gas. The TMC is a new innovation that pulls a major portion of water vapor produced by the combustion process from the flue gases along with its sensible and latent heat. This results in nearly 100% transfer of heat to the boiler feed water. The HAH improves the effectiveness of the TMC, particularly in steam systems that do not have a large amount of cold makeup water. In addition, the HAH humidifies the combustion air to reduce NOx formation. The split-stage economizer preheats boiler feed water in the same way as a conventional economizer, but extracts more heat by working in tandem with the TMC and HAH to reduce flue gas temperature. These components are designed to work synergistically to achieve energy efficiencies of 92-94% which is 10-15% higher than today's typical firetube boilers.

  4. 40 CFR 761.71 - High efficiency boilers.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... PROHIBITIONS Storage and Disposal § 761.71 High efficiency boilers. (a) To burn mineral oil dielectric fluid... percent (on a volume basis) of the total fuel feed rate. (v) The mineral oil dielectric fluid is not fed... feeding these fluids during either start up or shut down operations). (vi) The owner or operator of...

  5. 29. VIEW OF AREA BEHIND BOILER 904 LOOKING SOUTH. THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. VIEW OF AREA BEHIND BOILER 904 LOOKING SOUTH. THE HOPPERS IN THE RIGHT UPPER QUADRANT OF THE PHOTOGRAPH DISCHARGE FLY ASH INTO A VACUUM ASH COLLECTION SYSTEM. THE OGIVE SHAPED DEVICE BELOW THE HOPPER IS A RELIEF INTAKE VALVE FOR THE VACUUM ASH COLLECTION SYSTEM. THE "S" SHAPED CONDUITS TO THE LEFT OF THE HOPPERS CARRY BOILER FEED WATER FROM THE ECONOMIZERS (WATER PREHEATERS) TO THE BOILERS. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  6. Drying Milk With Boiler Exhaust

    NASA Technical Reports Server (NTRS)

    Broussard, M. R.

    1984-01-01

    Considerable energy saved in powdered-milk industry. Only special requirement boiler fired with natural gas or other clean fuel. Boiler flue gas fed to spray drier where it directly contacts product to be dried. Additional heat supplied by auxillary combustor when boiler output is low. Approach adaptable to existing plants with minimal investment because most already equipped with natural-gas-fired boilers.

  7. Drying Milk With Boiler Exhaust

    NASA Technical Reports Server (NTRS)

    Broussard, M. R.

    1984-01-01

    Considerable energy saved in powdered-milk industry. Only special requirement boiler fired with natural gas or other clean fuel. Boiler flue gas fed to spray drier where it directly contacts product to be dried. Additional heat supplied by auxillary combustor when boiler output is low. Approach adaptable to existing plants with minimal investment because most already equipped with natural-gas-fired boilers.

  8. General exterior view looking north. Boiler house is center/left. Engine ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General exterior view looking north. Boiler house is center/left. Engine house is center right. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

  9. Fluidized-bed boilers

    SciTech Connect

    Makansi, J.; Schwieger, B.

    1982-08-01

    Discusses atmospheric fluidized-bed (AFB) boilers with regard to designs available, manufacturers involved, and operating experience. Proven fuel flexibility and satisfactory SO/sub 2/ control without scrubbers make AFB boilers a viable option for industrial steam generation worldwide. Technical concepts on which AFB application is based are a departure from the more familiar methods of burning solid fuels. Behind US thrust for AFB development is the need to burn coal within pollution regulations.

  10. Effect of Bearing Housings on Centrifugal Pump Rotor Dynamics

    NASA Astrophysics Data System (ADS)

    Yashchenko, A. S.; Rudenko, A. A.; Simonovskiy, V. I.; Kozlov, O. M.

    2017-08-01

    The article deals with the effect of a bearing housing on rotor dynamics of a barrel casing centrifugal boiler feed pump rotor. The calculation of the rotor model including the bearing housing has been performed by the method of initial parameters. The calculation of a rotor solid model including the bearing housing has been performed by the finite element method. Results of both calculations highlight the need to add bearing housings into dynamic analyses of the pump rotor. The calculation performed by modern software packages is more a time-taking process, at the same time it is a preferred one due to a graphic editor that is employed for creating a numerical model. When it is necessary to view many variants of design parameters, programs for beam modeling should be used.

  11. 4. INTERIOR, CENTRAL BOILER ROOM, LOWER LEVEL, BOILERS, FROM SOUTHWEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. INTERIOR, CENTRAL BOILER ROOM, LOWER LEVEL, BOILERS, FROM SOUTHWEST CORNER OF ROOM, LOOKING SOUTHEAST. - Oakland Naval Supply Center, Heating Plant, North of B Street & West of Third Street, Oakland, Alameda County, CA

  12. 42. BOILER HOUSE FOURTH FLOOR, FORCED DRAFT FANS ABOVE BOILERS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    42. BOILER HOUSE FOURTH FLOOR, FORCED DRAFT FANS ABOVE BOILERS (SEE DRAWING Nos. 10 & 11 OF 13) - Delaware County Electric Company, Chester Station, Delaware River at South end of Ward Street, Chester, Delaware County, PA

  13. INTERIOR, SECOND LEVEL, SHOWING BOILERS. BOILER AT LEFT HAS REPLACED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    INTERIOR, SECOND LEVEL, SHOWING BOILERS. BOILER AT LEFT HAS REPLACED BURNERS. CAMERA FACING NORTH. - New Haven Rail Yard, Central Steam Plant and Oil Storage, Vicinity of Union Avenue, New Haven, New Haven County, CT

  14. 1. EXTERIOR VIEW OF BOILER HOUSE FROM SOUTHWEST. THE BOILER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. EXTERIOR VIEW OF BOILER HOUSE FROM SOUTHWEST. THE BOILER HOUSE WAS USED FOR HEATING THE MILL; HYDRO-ELECTRIC POWER FOR PRODUCTION WAS PURCHASED FROM THE COLUMBUS LIGHT & POWER COMPANY. NORTH END OF 1924 MILL TO RIGHT, c. 1970 WINDOWLESS WEAVE ROOM ADDITION TO LEFT. - Stark Mill, Boiler House, 117 Corinth Road, Hogansville, Troup County, GA

  15. Super Boiler: First Generation, Ultra-High Efficiency Firetube Boiler

    SciTech Connect

    2006-06-01

    This factsheet describes a research project whose goal is to develop and demonstrate a first-generation ultra-high-efficiency, ultra-low emissions, compact gas-fired package boiler (Super Boiler), and formulate a long-range RD&D plan for advanced boiler technology out to the year 2020.

  16. Concept of the solar-pumped laser-photovoltaics combined system and its application to laser beam power feeding to electric vehicles

    NASA Astrophysics Data System (ADS)

    Motohiro, Tomoyoshi; Takeda, Yasuhiko; Ito, Hiroshi; Hasegawa, Kazuo; Ikesue, Akio; Ichikawa, Tadashi; Higuchi, Kazuo; Ichiki, Akihisa; Mizuno, Shintaro; Ito, Tadashi; Yamada, Noboru; Nath Luitel, Hom; Kajino, Tsutomu; Terazawa, Hidetaka; Takimoto, Satoshi; Watanabe, Kemmei

    2017-08-01

    We have developed a compact solar-pumped laser (µSPL) employing an off-axis parabolic mirror with an aperture of 76.2 mm diameter and an yttrium aluminum garnet (YAG) ceramic rod of φ1 mm × 10 mm doped with 1% Nd and 0.1% Cr as a laser medium. The laser oscillation wavelength of 1.06 µm, just below the optical absorption edge of Si cells, is suitable for photoelectric conversion with minimal thermal loss. The concept of laser beam power feeding to an electric vehicle equipped with a photovoltaic panel on the roof was proposed by Ueda in 2010, in which the electricity generated by solar panels over the road is utilized to drive a semiconductor laser located on each traffic signal along the road. By substituting this solar-electricity-driven semiconductor laser with a solar-pumped laser, the energy loss of over 50% in converting the solar electricity to a laser beam can be eliminated. The overall feasibility of this system in an urban area such as Tokyo was investigated.

  17. (5 + 1) × 1 pump and signal power combiner with 9/80 μm feed-through signal fiber

    NASA Astrophysics Data System (ADS)

    Stachowiak, Dorota; Kaczmarek, Paweł; Abramski, Krzysztof M.

    2017-08-01

    In this paper we demonstrate our concept and fabrication details of a (5 + 1) × 1 pump power combiner with signal feed-through. The (5 + 1) × 1 configuration is based on a feed-through signal fiber with reduced clad diameter in comparison to multimode fibers (MMFs) used in the combiner. Our idea is to use a 9/80 μm signal fiber and five conventional 105/125 μm MMFs. Using this number of MMFs with 125 μm clad diameter and signal fiber with 80 μm clad diameter allows for easy placement of all fibers in proper position in a capillary tube - the signal fiber is always in the central position, surrounded by the MMFs. It also enables reducing the taper ratio parameter, and thus increase the signal transmission efficiency. Using this approach, signal transmission at the level of 94.3% was achieved, which is better than typical values offered by commercially available singlemode devices.

  18. Fluidized-bed boilers

    SciTech Connect

    Makansi, J.; Schwieger, B.

    1982-08-01

    This report reviews the current state of atmospheric fluidized-bed combustion. The fundamentals of fluidized-bed combustion and design considerations are first discussed. Tables provide details of manufacturers, worldwide, and of the boilers now installed. Eight plants in various countries and burning a variety of fuels, are described more fully.

  19. Optimising boiler performance.

    PubMed

    Mayoh, Paul

    2009-01-01

    Soaring fuel costs continue to put the squeeze on already tight health service budgets. Yet it is estimated that combining established good practice with improved technologies could save between 10% and 30% of fuel costs for boilers. Paul Mayoh, UK technical manager at Spirax Sarco, examines some of the practical measures that healthcare organisations can take to gain their share of these potential savings.

  20. Designers pick surge hoppers over bins for many boilers

    SciTech Connect

    Schwieger, B.

    1980-02-01

    A boiler fuel-feed system is described and the use of live- bottom surge hoppers is preferred over bins with multiple-screw feeders. The need for an even distribution of hog fuel without segregation by size among the various feed chutes to supply the furnace is stressed. The distribution of fuel among the chutes using flight conveyors, swining spouts and vibrating conveyors is described.

  1. 49 CFR 230.57 - Injectors and feedwater pumps.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Injectors and feedwater pumps. 230.57 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Injectors, Feedwater Pumps, and Flue Plugs § 230.57 Injectors and feedwater pumps. (a)...

  2. 49 CFR 230.57 - Injectors and feedwater pumps.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Injectors and feedwater pumps. 230.57 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Injectors, Feedwater Pumps, and Flue Plugs § 230.57 Injectors and feedwater pumps. (a)...

  3. 49 CFR 230.57 - Injectors and feedwater pumps.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Injectors and feedwater pumps. 230.57 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Injectors, Feedwater Pumps, and Flue Plugs § 230.57 Injectors and feedwater pumps. (a)...

  4. 49 CFR 230.57 - Injectors and feedwater pumps.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Injectors and feedwater pumps. 230.57 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Injectors, Feedwater Pumps, and Flue Plugs § 230.57 Injectors and feedwater pumps. (a)...

  5. Looking northwest at the former river pump house (current lunch ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking northwest at the former river pump house (current lunch room). - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  6. 7. RW Meyer Sugar Mill: 18761889. Engine and boiler house; ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. RW Meyer Sugar Mill: 1876-1889. Engine and boiler house; ca. 1881. Simple, single-cylinder, horizontal, reciprocating steam engine, model No. 1, 5' x 10', 6 hp, 175 rpm. Manufactured by Ames Iron Works, Oswego, New York, 1879. View: Historical view, 1934, from T. T. Waterman collection, Hawaiian Sugar Planters' Association. View shows interior of engine and boiler house intact. The steam-feed pipe is still attached to throttle valve, not the case in 1978 view. - R. W. Meyer Sugar Mill, State Route 47, Kualapuu, Maui County, HI

  7. Boiler modeling optimizes sootblowing

    SciTech Connect

    Piboontum, S.J.; Swift, S.M.; Conrad, R.S.

    2005-10-01

    Controlling the cleanliness and limiting the fouling and slagging of heat transfer surfaces are absolutely necessary to optimize boiler performance. The traditional way to clean heat-transfer surfaces is by sootblowing using air, steam, or water at regular intervals. But with the advent of fuel-switching strategies, such as switching to PRB coal to reduce a plant's emissions, the control of heating surface cleanliness has become more problematic for many owners of steam generators. Boiler modeling can help solve that problem. The article describes Babcock & Wilcox's Powerclean modeling system which consists of heating surface models that produce real-time cleanliness indexes. The Heat Transfer Manager (HTM) program is the core of the system, which can be used on any make or model of boiler. A case study is described to show how the system was successfully used at the 1,350 MW Unit 2 of the American Electric Power's Rockport Power Plant in Indiana. The unit fires a blend of eastern bituminous and Powder River Basin coal. 5 figs.

  8. Super Boiler 2nd Generation Technology for Watertube Boilers

    SciTech Connect

    Mr. David Cygan; Dr. Joseph Rabovitser

    2012-03-31

    This report describes Phase I of a proposed two phase project to develop and demonstrate an advanced industrial watertube boiler system with the capability of reaching 94% (HHV) fuel-to-steam efficiency and emissions below 2 ppmv NOx, 2 ppmv CO, and 1 ppmv VOC on natural gas fuel. The boiler design would have the capability to produce >1500 F, >1500 psig superheated steam, burn multiple fuels, and will be 50% smaller/lighter than currently available watertube boilers of similar capacity. This project is built upon the successful Super Boiler project at GTI. In that project that employed a unique two-staged intercooled combustion system and an innovative heat recovery system to reduce NOx to below 5 ppmv and demonstrated fuel-to-steam efficiency of 94% (HHV). This project was carried out under the leadership of GTI with project partners Cleaver-Brooks, Inc., Nebraska Boiler, a Division of Cleaver-Brooks, and Media and Process Technology Inc., and project advisors Georgia Institute of Technology, Alstom Power Inc., Pacific Northwest National Laboratory and Oak Ridge National Laboratory. Phase I of efforts focused on developing 2nd generation boiler concepts and performance modeling; incorporating multi-fuel (natural gas and oil) capabilities; assessing heat recovery, heat transfer and steam superheating approaches; and developing the overall conceptual engineering boiler design. Based on our analysis, the 2nd generation Industrial Watertube Boiler when developed and commercialized, could potentially save 265 trillion Btu and $1.6 billion in fuel costs across U.S. industry through increased efficiency. Its ultra-clean combustion could eliminate 57,000 tons of NOx, 460,000 tons of CO, and 8.8 million tons of CO2 annually from the atmosphere. Reduction in boiler size will bring cost-effective package boilers into a size range previously dominated by more expensive field-erected boilers, benefiting manufacturers and end users through lower capital costs.

  9. Modeling of a coal-fired natural circulation boiler

    SciTech Connect

    Bhambare, K.S.; Mitra, S.K.; Gaitonde, U.N.

    2007-06-15

    Modeling of a natural circulation boiler for a coal-fired thermal power station is presented here. The boiler system is divided into seven subcomponents, and for each section, models based on conservation of mass, momentum, and energy are formulated. The pressure drop at various sections and the heat transfer coefficients are computed using empirical correlations. Solutions are obtained by using SIMULINK. The model is validated by comparing its steady state and dynamic responses with the actual plant data. Open loop responses of the model to the step changes in the operating parameters, such as pressure, temperature, steam flow, feed water flow, are also analyzed. The present model can be used for the development and design of effective boiler control systems.

  10. Small boiler uses waste coal

    SciTech Connect

    Virr, M.J.

    2009-07-15

    Burning coal waste in small boilers at low emissions poses considerable problem. While larger boiler suppliers have successfully installed designs in the 40 to 80 MW range for some years, the author has been developing small automated fluid bed boiler plants for 25 years that can be applied in the range of 10,000 to 140,000 lbs/hr of steam. Development has centered on the use of an internally circulating fluid bed (CFB) boiler, which will burn waste fuels of most types. The boiler is based on the traditional D-shaped watertable boiler, with a new type of combustion chamber that enables a three-to-one turndown to be achieved. The boilers have all the advantages of low emissions of the large fluid boilers while offering a much lower height incorporated into the package boiler concept. Recent tests with a waste coal that had a high nitrogen content of 1.45% demonstrated a NOx emission below the federal limit of 0.6 lbs/mm Btu. Thus a NOx reduction on the order of 85% can be demonstrate by combustion modification alone. Further reductions can be made by using a selective non-catalytic reduction (SNCR) system and sulfur absorption of up to 90% retention is possible. The article describes the operation of a 30,000 lbs/hr boiler at the Fayette Thermal LLC plant. Spinheat has installed three ICFB boilers at a nursing home and a prison, which has been tested on poor-grade anthracite and bituminous coal. 2 figs.

  11. Final Report for the Erosion-Corrosion Anaysis of Tank 241-AW-02E Feed Pump Pit Jumpers B-2 and 1-4 Removed from Service in 2013

    SciTech Connect

    Page, Jason S.

    2014-04-07

    This document is the final report summarizing the results in the examination of two pipe sections (jumpers) from the tank 241-AW-02E feed pump pit in the 241-AW tank farm. These pipe section samples consisted of jumper AW02E-WT-J-[B – 2] and jumper AW02E-WT-J-[1 – 4]. For the remainder of this report, these jumpers will be referred to as B – 2 and 1 – 4.

  12. Nasogastric feeding tube

    MedlinePlus

    Feeding - nasogastric tube; NG tube; Bolus feeding; Continuous pump feeding; Gavage tube ... If your child has an NG tube, try to keep your child from touching or pulling on the tube. After your nurse teaches you how to flush the tube ...

  13. Pyroflow CFB boiler meets the dynamic challenges of utility operation

    SciTech Connect

    Chelian, P.K.; Hickey, M.; Utt, J.

    1995-12-31

    Large size CFB units supplied to utilities are required to respond rapidly and accurately to the system load demand signals. These units are designed to receive demand signals from load demand computers (economic dispatch systems), and by various types of feed forward controls to achieve the desired level of generation in a minimum amount of time, with minimum upset to the steam conditions. Pyropower Corporation supplied a 165 MWe net capacity CFB boiler to the Nova Scotia Power Inc., Point Aconi Station. This boiler was subjected to a number of tests to demonstrate the dynamic response of the boiler. The tests included minor and major load rejections as well as rapid increase and decrease of load. One of the tests was to demonstrate the ability to reject from full load to the house load and operate for eight hours. This report summarizes the experience of these tests, which leads to the conclusion that CFB boilers, when properly designed and tuned, are capable of meeting the present day challenges of dynamic response in dispatch mode of operation. This paper also draws references from other large size Pyroflow CFB units that are operating in cycling modes to address the capabilities of the CFB boilers related to rapid load variation.

  14. Design features of first of its kind AFBC high pressure boiler for Kutch lignite fuel in Gujarat, India

    SciTech Connect

    Mokashi, A.; Diwakar, K.W.

    1998-07-01

    Gujarat Heavy Chemicals Ltd. (GHCL) of Gujarat State in India is one of the largest manufacturers of Soda Ash with modern technology from Akzo of the Netherlands. GHCL with earlier experience in firing lignite on a travagrate boiler and with a converted fluidized bed boiler has very clearly identified the problem area for review, and with that rich experience awarded a contract to Thermax Babcock and Wilcox Ltd. (TBW), Pune, India. Accordingly, a boiler has been designed to suit Kutch Lignite and coal with AFBC technology. This paper discusses the complete design of the boiler, effects of Kutch Lignite, its composition, thermal efficiency on coal as well as lignite, various performance parameters and guarantees, sizing arrangements of pressure parts, feeding arrangement and specially designed fluidizing bed combustor, various instrumentation and control loops. This paper discusses all the above features of this high-pressure boiler which can be an ideal boiler for the Kutch lignite fuel.

  15. Design and research of retrofitting PC boiler into CFB boiler

    SciTech Connect

    Chen, H.P.; Lu, J.D.; Huang, L.; Liu, H.; Lin, Z.; Liu, D.C.

    1997-12-31

    In China, there are a large number of aged pulverized coal (PC) boilers at aging utility power plants. Many of them are beyond their reasonable working life or in a condition of unreliable operation, low combustion efficiency, and serious air pollution. It is very important and urgent to retrofit the aged PC boilers, and repower the aging utility power plants in China. Circulating fluidized bed (CFB) boilers have been developed rapidly, and paid great attention to in China. There are many striking advantages to retrofit an aged boiler with a CFB boiler. The retrofitting is suitable to meet the needs of effective utilization of low-grade coal, reducing SO{sub 2} and NO{sub x} emissions and repowering an aging power plant. The cost is much lower than that of building a new CFB unit. The National Laboratory of Coal Combustion (NLCC) has always paid great attention to studying and developing CFB combustion technology in connection with Chinese national conditions, and has evolved distinguishing technology features of its own. This paper introduces a new design concept of retrofitting PC boiler into Pi ({Pi}-shaped) CFB boiler with downward exhaust cyclone, and relevant research work and results of design and calculation.

  16. 30 CFR 56.13030 - Boilers.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Boilers. 56.13030 Section 56.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Compressed Air and Boilers § 56.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure...

  17. 30 CFR 56.13030 - Boilers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Boilers. 56.13030 Section 56.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Compressed Air and Boilers § 56.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure...

  18. 30 CFR 77.413 - Boilers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Boilers. 77.413 Section 77.413 Mineral... Mechanical Equipment § 77.413 Boilers. (a) Boilers shall be equipped with guarded, well-maintained water... the gages shall be kept clean and free of scale and rust. (b) Boilers shall be equipped with...

  19. 30 CFR 77.413 - Boilers.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Boilers. 77.413 Section 77.413 Mineral... Mechanical Equipment § 77.413 Boilers. (a) Boilers shall be equipped with guarded, well-maintained water... the gages shall be kept clean and free of scale and rust. (b) Boilers shall be equipped with...

  20. 30 CFR 56.13030 - Boilers.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Boilers. 56.13030 Section 56.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Compressed Air and Boilers § 56.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure...

  1. 30 CFR 77.413 - Boilers.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Boilers. 77.413 Section 77.413 Mineral... Mechanical Equipment § 77.413 Boilers. (a) Boilers shall be equipped with guarded, well-maintained water... the gages shall be kept clean and free of scale and rust. (b) Boilers shall be equipped with...

  2. 49 CFR 230.47 - Boiler number.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Boiler number. 230.47 Section 230.47..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Steam Gauges § 230.47 Boiler number. (a) Generally. The builder's number of the boiler, if known,...

  3. 30 CFR 57.13030 - Boilers.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Boilers. 57.13030 Section 57.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Compressed Air and Boilers § 57.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges,...

  4. 49 CFR 230.47 - Boiler number.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Boiler number. 230.47 Section 230.47..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Steam Gauges § 230.47 Boiler number. (a) Generally. The builder's number of the boiler, if known,...

  5. 30 CFR 57.13030 - Boilers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Boilers. 57.13030 Section 57.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Compressed Air and Boilers § 57.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges,...

  6. 30 CFR 56.13030 - Boilers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Boilers. 56.13030 Section 56.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Compressed Air and Boilers § 56.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure...

  7. 30 CFR 56.13030 - Boilers.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Boilers. 56.13030 Section 56.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Compressed Air and Boilers § 56.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure...

  8. 30 CFR 57.13030 - Boilers.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Boilers. 57.13030 Section 57.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Compressed Air and Boilers § 57.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges,...

  9. 30 CFR 57.13030 - Boilers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Boilers. 57.13030 Section 57.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Compressed Air and Boilers § 57.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges,...

  10. 30 CFR 77.413 - Boilers.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Boilers. 77.413 Section 77.413 Mineral... Mechanical Equipment § 77.413 Boilers. (a) Boilers shall be equipped with guarded, well-maintained water... the gages shall be kept clean and free of scale and rust. (b) Boilers shall be equipped with...

  11. 30 CFR 57.13030 - Boilers.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Boilers. 57.13030 Section 57.13030 Mineral... HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Compressed Air and Boilers § 57.13030 Boilers. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges,...

  12. 30 CFR 77.413 - Boilers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Boilers. 77.413 Section 77.413 Mineral... Mechanical Equipment § 77.413 Boilers. (a) Boilers shall be equipped with guarded, well-maintained water... the gages shall be kept clean and free of scale and rust. (b) Boilers shall be equipped with...

  13. 49 CFR 230.47 - Boiler number.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Boiler number. 230.47 Section 230.47..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Steam Gauges § 230.47 Boiler number. (a) Generally. The builder's number of the boiler, if known,...

  14. Bagasse-fired steam boiler station for Kenana Sugar in Sudan

    SciTech Connect

    Not Available

    1981-02-01

    The equipment and operation of the bagasse fired steam boiler station of the Kenana Sugar factory in Sudan are described. The station consists of six bagasse-fired, steam boilers with individual capacities of 113 tonnes per hour which provide steam for a 40 MN power station. During the off-season it serves as a regional power station which also operates irrigation facilities to the cane fields. The bagasse handling and feeding system is also described.

  15. INTERIOR VIEW OF MIANUS RIVER PUMP STATION LOOKING SOUTHEAST. THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    INTERIOR VIEW OF MIANUS RIVER PUMP STATION LOOKING SOUTHEAST. THE CYLINDRICAL TANKS ON THE RIGHT SIDE OF THE PHOTOGRAPH ARE SAND-GRAVEL FILTERS. THE DIESEL POWERED PUMPS LOCATED IN THE CENTER LEFT FOREGOUND SUPPLIED FRESH WATER THROUGH A 16" LINE TO THE POWER PLANT BOILERS LOCATED ONE MILE SOUTH OF THE PUMP STATION - New York, New Haven & Hartford Railroad, Mianus River Pumping Station, River Road & Boston Post Road, Greenwich, Fairfield County, CT

  16. Feeding Tips For Your Baby with CHD

    MedlinePlus

    ... with a combination of breast- and bottle-feeding. Breast-Feeding Your Baby If your baby is diagnosed with ... use too. If your baby needs surgery after breast-feeding has been established, you can pump your breasts ...

  17. Waste heat recovery boiler

    SciTech Connect

    Taiji Inui, H.; Makoto Sasaki, M.

    1984-08-21

    A waste heat recovery boiler for generating steam by utilizing a flue gas discharged from a gas turbine as a heat source comprises an economizer for preheating feedwater by the flue gas, an evaporator for evaporating the preheated feedwater, and a superheater for generating a steam for driving a steam prime mover by heating the evaporated feedwater. The economizer, the evaporator and the superheater are successively arranged in the direction from a downstream side to an upstream side of flue gas passage. The evaporator itself is divided into two sections and an apparatus for removing NO /SUB x/ is provided in a space between the divided two sections of the evaporator in the flue gas passage to remove NO /SUB x/ from the flue gas. An NO /SUB x/ concentration of a flue gas discharged from a combined cycle power plant including the gas turbine can be stably abated at any of full and partial loads.

  18. CFB boiler at Gardanne (France)

    SciTech Connect

    Jaud, P.; Jacquet, L.; Delot, P.; Bayle, F.

    1995-06-01

    Among the new Clean Coal Technologies, {open_quotes}Circulating Fluidized Bed{close_quotes} is one of the most promising. Today, the largest project in commissioning`s the 250 MWe Provence CFB boiler, located near MARSEILLE in the south of France. At such a size, the CFB technique has now reached a capacity corresponding to thermal power plants operated by utilities. This new unit is a very important step towards larger size i.e. 400 MWe and greater. The SO{sub 2} emissions of this CFB boiler are guaranteed to be less than 400 mg / Nm{sup 3} at 6% O{sub 2} with the ratio of Ca/S lower than 3 while total sulfur in local coal used can reach 3.68 %. The purpose of the Provence project was to replace the existing pulverized coal boiler unit 4, commissioned in 1967, of the Provence power plant, with a new CFB boiler while reusing most of the existing equipment. The new boiler has been ordered from GEC ALSTHOM STEIN INDUSTREE (GASI) by Electricite de France (EDF) on behalf of the SOPROLIF consortium. Architect Engineering and construction management was performed by EDF jointly with Charbonnages de France (CdF: the French Coal Board). The 250 MWe CFB boiler is of the superheat-reheat type. The first firing of the boiler is due in April 1995. The poster session will describe the progress in the construction of the plant and provides technical details of the new boiler and auxiliaries.

  19. Chemical corrosion potential in boilers

    SciTech Connect

    Bairr, D.L.; McDonough, C.J.

    1998-12-31

    Misuse or abuse of chelants has long been recognized as a potential corrosion problem in boilers. In recent years all polymer chemical treatment programs have been introduced and although they are much more benign even all polymer programs must be properly designed and controlled. Under extreme conditions a similar corrosion potential exists. This paper discusses the potential for chelant or polymer corrosion in boilers and the proper safeguards. Case histories are presented.

  20. Boiler-turbine life extension

    SciTech Connect

    Natzkov, S.; Nikolov, M.

    1995-12-01

    The design life of the main power equipment-boilers and turbines is about 105 working hours. The possibilities for life extension are after normatively regulated control tests. The diagnostics and methodology for Boilers and Turbines Elements Remaining Life Assessment using up to date computer programs, destructive and nondestructive control of metal of key elements of units equipment, metal creep and low cycle fatigue calculations. As well as data for most common damages and some technical decisions for elements life extension are presented.

  1. Looking northeast at the former river pump house (current lunch ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking northeast at the former river pump house (current lunch room) and the former power house (current river pump house). - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  2. 46 CFR 61.05-10 - Boilers in service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Boilers in service. 61.05-10 Section 61.05-10 Shipping... INSPECTIONS Tests and Inspections of Boilers § 61.05-10 Boilers in service. (a) Each boiler, including superheater, reheater, economizer, auxiliary boiler, low-pressure heating boiler, and unfired steam...

  3. 46 CFR 61.05-10 - Boilers in service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Boilers in service. 61.05-10 Section 61.05-10 Shipping... INSPECTIONS Tests and Inspections of Boilers § 61.05-10 Boilers in service. (a) Each boiler, including superheater, reheater, economizer, auxiliary boiler, low-pressure heating boiler, and unfired steam...

  4. 46 CFR 61.05-10 - Boilers in service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Boilers in service. 61.05-10 Section 61.05-10 Shipping... INSPECTIONS Tests and Inspections of Boilers § 61.05-10 Boilers in service. (a) Each boiler, including superheater, reheater, economizer, auxiliary boiler, low-pressure heating boiler, and unfired steam...

  5. 46 CFR 61.05-10 - Boilers in service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Boilers in service. 61.05-10 Section 61.05-10 Shipping... INSPECTIONS Tests and Inspections of Boilers § 61.05-10 Boilers in service. (a) Each boiler, including superheater, reheater, economizer, auxiliary boiler, low-pressure heating boiler, and unfired steam...

  6. 46 CFR 61.05-10 - Boilers in service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Boilers in service. 61.05-10 Section 61.05-10 Shipping... INSPECTIONS Tests and Inspections of Boilers § 61.05-10 Boilers in service. (a) Each boiler, including superheater, reheater, economizer, auxiliary boiler, low-pressure heating boiler, and unfired steam...

  7. Boiler using combustible fluid

    DOEpatents

    Baumgartner, H.; Meier, J.G.

    1974-07-03

    A fluid fuel boiler is described comprising a combustion chamber, a cover on the combustion chamber having an opening for introducing a combustion-supporting gaseous fluid through said openings, means to impart rotation to the gaseous fluid about an axis of the combustion chamber, a burner for introducing a fluid fuel into the chamber mixed with the gaseous fluid for combustion thereof, the cover having a generally frustro-conical configuration diverging from the opening toward the interior of the chamber at an angle of between 15/sup 0/ and 55/sup 0/; means defining said combustion chamber having means defining a plurality of axial hot gas flow paths from a downstream portion of the combustion chamber to flow hot gases into an upstream portion of the combustion chamber, and means for diverting some of the hot gas flow along paths in a direction circumferentially of the combustion chamber, with the latter paths being immersed in the water flow path thereby to improve heat transfer and terminating in a gas outlet, the combustion chamber comprising at least one modular element, joined axially to the frustro-conical cover and coaxial therewith. The modular element comprises an inner ring and means of defining the circumferential, radial, and spiral flow paths of the hot gases.

  8. Looking southeast at the conveyor belt and tripper feeding the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking southeast at the conveyor belt and tripper feeding the coal storage hoppers. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  9. 16 CFR 305.12 - Labeling for central air conditioners, heat pumps, and furnaces.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... pumps, and furnaces. 305.12 Section 305.12 Commercial Practices FEDERAL TRADE COMMISSION REGULATIONS... pumps, and furnaces. (a) Layout. All energy labels for central air conditioners, heat pumps, and furnaces (including boilers) shall use one size, similar colors, and typefaces with consistent...

  10. Program to Train Boiler Operators Developed

    ERIC Educational Resources Information Center

    Chemical and Engineering News, 1978

    1978-01-01

    This program initiated by Nalco Chemical, a major supplier of chemicals for boiler feedwater treatment, uses texts, audiovisual aids, and hands-on experience and is designed to boost the efficiency of boiler operators. (BB)

  11. Boiler for generating high quality vapor

    NASA Technical Reports Server (NTRS)

    Gray, V. H.; Marto, P. J.; Joslyn, A. W.

    1972-01-01

    Boiler supplies vapor for use in turbines by imparting a high angular velocity to the liquid annulus in heated rotating drum. Drum boiler provides a sharp interface between boiling liquid and vapor, thereby, inhibiting the formation of unwanted liquid droplets.

  12. Program to Train Boiler Operators Developed

    ERIC Educational Resources Information Center

    Chemical and Engineering News, 1978

    1978-01-01

    This program initiated by Nalco Chemical, a major supplier of chemicals for boiler feedwater treatment, uses texts, audiovisual aids, and hands-on experience and is designed to boost the efficiency of boiler operators. (BB)

  13. New controls spark boiler efficiency

    SciTech Connect

    Engels, T. )

    1993-09-01

    Monsanto's NutraSweet plant in University Park, IL, produces aspartame, the patented NutraSweet artificial sweetener product. Until recently, boiler control was managed by a '60s-era Fireye jackshaft system in which air and natural gas were mechanically linked with an offset to compensate for oxygen trim. The interlocking devices on the Fireye system were becoming obsolete, and the boiler needed a new front end retrofitted for low emissions. In order to improve boiler control efficiency, we decided to modernize and automate the entire boiler control system. We replaced the original jackshaft system, and installed a Gordon-Piet burner system, including gas valves, air dampers, blowers, and burner. The upgrade challenges included developing a control strategy and selecting and implementing a process control system. Since our plant has standardized on the PROVOX process management information system from Fisher Controls (now Fisher-Rosemount Systems) to support most of our process, it was a natural and logical choice for boiler controls as well. 2 figs.

  14. ECUT energy data reference series: boilers

    SciTech Connect

    Chockie, A.D.; Johnson, D.R.

    1984-09-01

    Information on the population and fuel consumption of water-tube, fire-tube and cast iron boilers is summarized. The use of each boiler type in the industrial and commercial sector is examined. Specific information on each boiler type includes (for both 1980 and 2000) the average efficiency of the boiler, the capital stock, the amount of fuel consumed, and the activity level as measured by operational load factor.

  15. 29 CFR 1915.162 - Ship's boilers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Ship's boilers. (a) Before work is performed in the fire, steam, or water spaces of a boiler where employees may be subject to injury from the direct escape of a high temperature medium such as steam, or... that employees are working in the boilers shall be hung in a conspicuous location in the engine...

  16. 29 CFR 1915.162 - Ship's boilers.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Ship's boilers. (a) Before work is performed in the fire, steam, or water spaces of a boiler where employees may be subject to injury from the direct escape of a high temperature medium such as steam, or... that employees are working in the boilers shall be hung in a conspicuous location in the engine...

  17. 29 CFR 1915.162 - Ship's boilers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Ship's boilers. (a) Before work is performed in the fire, steam, or water spaces of a boiler where employees may be subject to injury from the direct escape of a high temperature medium such as steam, or... employees are working in the boilers shall be hung in a conspicuous location in the engine room. This...

  18. 29 CFR 1915.162 - Ship's boilers.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Ship's boilers. (a) Before work is performed in the fire, steam, or water spaces of a boiler where employees may be subject to injury from the direct escape of a high temperature medium such as steam, or... that employees are working in the boilers shall be hung in a conspicuous location in the engine...

  19. 29 CFR 1915.162 - Ship's boilers.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Ship's boilers. (a) Before work is performed in the fire, steam, or water spaces of a boiler where employees may be subject to injury from the direct escape of a high temperature medium such as steam, or... employees are working in the boilers shall be hung in a conspicuous location in the engine room. This...

  20. Sootblowing optimization for improved boiler performance

    DOEpatents

    James, John Robert; McDermott, John; Piche, Stephen; Pickard, Fred; Parikh, Neel J.

    2012-12-25

    A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

  1. Sootblowing optimization for improved boiler performance

    DOEpatents

    James, John Robert; McDermott, John; Piche, Stephen; Pickard, Fred; Parikh, Neel J

    2013-07-30

    A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

  2. 49 CFR 230.47 - Boiler number.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Steam Gauges § 230.47 Boiler number. (a) Generally. The builder's number of the boiler, if known, shall... known or the name of the steam locomotive owner if a new number is assigned. Safety Relief Valves ...

  3. 49 CFR 230.47 - Boiler number.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Steam Gauges § 230.47 Boiler number. (a) Generally. The builder's number of the boiler, if known, shall... known or the name of the steam locomotive owner if a new number is assigned. Safety Relief Valves ...

  4. A technology assessment of solar energy systems. Direct combustion of wood and other biomass in industrial boilers

    NASA Astrophysics Data System (ADS)

    Abelson, H. I.; Habegger, L. J.; Liu, B. C.

    1981-12-01

    The cost, resource requirements, and environmental characteristics of a model combustion system sized to handle an annual feed of 12,500 dry tons of forest residue were evaluated. The cost of the wood combustion system is comparable to that of coal fired boilers in industry. Atmospheric emissions of the wood system are lower in sulfur dioxide than those of coal systems, but emissions of particulate matter are potentially higher. The combined use of multicyclones and wet scrubbers, however, can reduce these emissions to levels produced by coal systems. Cost and environmental characteristics of boilers that burn sugarcane bagasse are compared to those of wood fired boilers because the two systems are similar.

  5. SNAP-8 refractory boiler development program

    NASA Technical Reports Server (NTRS)

    Fuller, R. A.

    1974-01-01

    Performance and endurance tests of the SNAP-8, SN-1 refractory metal boiler are described. The tests were successful and indicated that the boiler heat transfer area could be reduced significantly primarily because of the wetting characteristics of mercury on tantalum in a contaminant-free environment. A continuous endurance test of more than 10,000 hours was conducted without noticeable change in the thermal performance of the boiler. A conclusion of the metallographic examination of the boiler following the endurance test was that expected boiler life would be of the order of 40,000 hours at observed corrosion rates.

  6. Development of a reburning boiler process model

    SciTech Connect

    Wu, K.T.

    1992-01-30

    The overall objective of this program is to integrate EER's expertise in boiler reburning performance evaluation into a package of analytical computer tools. Specific objectives of the program are to develop a computational capability with the following features: (1) can be used to predict the impact of gas reburning application on thermal conditions in the boiler radiant furnace, and on overall boiler performance; (2) can estimate gas reburning NO{sub x} reduction effectiveness based on specific reburning configurations and furnace/boiler configurations; (3) can be used as an analytical tool to evaluate the impact of boiler process parameters (e.g., fuel switching and changes in boiler operating conditions) on boiler thermal performance; (4) is adaptable to most boiler designs (tangential and wall fire boilers) and a variety of fuels (solid, liquid, gaseous and slurried fuels); (5) is sufficiently user friendly to be exercisable by engineers with a reasonable knowledge of boilers, and with reasonable computer skills. Here, user friendly'' means that the user will be guided by computer codes during the course of setting up individual input files for the boiler performance model.

  7. Penis Pump

    MedlinePlus

    Penis pump Overview By Mayo Clinic Staff A penis pump is one of a few treatment options ... an erection sufficient for sex (erectile dysfunction). A penis pump consists of a plastic tube that fits ...

  8. Alternate Materials for Recovery Boiler Superheater Tubes

    SciTech Connect

    Keiser, James R; Kish, Joseph; Singbeil, Douglas

    2009-01-01

    The ever escalating demands for increased efficiency of all types of boilers would most sensibly be realized by an increase in the steam parameters of temperature and pressure. However, materials and corrosion limitations in the steam generating components, particularly the superheater tubes, present major obstacles to boiler designers in achieving systems that can operate under the more severe conditions. This paper will address the issues associated with superheater tube selection for many types of boilers; particularly chemical recovery boilers, but also addressing the similarities in issues for biomass and coal fired boilers. It will also review our recent study of materials for recovery boiler superheaters. Additional, more extensive studies, both laboratory and field, are needed to gain a better understanding of the variables that affect superheater tube corrosion and to better determine the best means to control this corrosion to ultimately permit operation of recovery boilers at higher temperatures and pressures.

  9. Cleaning of boiler heating surfaces

    SciTech Connect

    Maidanik, M. N.; Vasil'ev, V. V.

    2006-09-15

    Basic methods and facilities for the external cleaning of the heating surfaces of boilers designed for the combustion of low-grade solid fuels are discussed. Water and steam blastings, which are the basic means of cleaning furnace shields, and semi-radiative and convective heating surfaces have the greatest range of application.

  10. Acoustic Pump

    NASA Technical Reports Server (NTRS)

    Heyman, Joseph S.

    1993-01-01

    Pump uses acoustic-radiation forces. Momentum transferred from sound waves to sound-propagating material in way resulting in net pumping action on material. Acoustic pump is solid-state pump. Requires no moving parts, entirely miniaturized, and does not invade pumped environment. Silent, with no conventional vibration. Used as pump for liquid, suspension, gas, or any other medium interacting with radiation pressure. Also used where solid-state pump needed for reliability and controllability. In microgravity environment, device offers unusual control for low flow rates. For medical or other applications in which contamination cannot be allowed, offers noninvasive pumping force.

  11. Thermal treatment and vitrification of boiler ash from a municipal solid waste incinerator.

    PubMed

    Yang, Y; Xiao, Y; Voncken, J H L; Wilson, N

    2008-06-15

    Boiler ash generated from municipal solid waste (MSW) incinerators is usually classified as hazardous materials and requires special disposal. In the present study, the boiler ash was characterized for the chemical compositions, morphology and microstructure. The thermal chemical behavior during ash heating was investigated with thermal balance. Vitrification of the ash was conducted at a temperature of 1400 degrees C in order to generate a stable silicate slag, and the formed slag was examined with chemical and mineralogical analyses. The effect of vitrification on the leaching characteristics of various elements in the ash was evaluated with acid leaching. The study shows that the boiler ash as a heterogeneous fine powder contains mainly silicate, carbonate, sulfates, chlorides, and residues of organic materials and heavy metal compounds. At elevated temperatures, the boiler ash goes through the initial moisture removal, volatilization, decomposition, sintering, melting, and slag formation. At 1400 degrees C a thin layer of salt melt and a homogeneous glassy slag was formed. The experimental results indicate that leaching values of the vitrified slag are significantly reduced compared to the original boiler ash, and the vitrification could be an interesting alternative for a safer disposal of the boiler ash. Ash compacting, e.g., pelletizing can reduce volatilization and weight loss by about 50%, and would be a good option for the feed preparation before vitrification.

  12. 46 CFR 52.25-20 - Exhaust gas boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Exhaust gas boilers. 52.25-20 Section 52.25-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING POWER BOILERS Other Boiler Types § 52.25-20 Exhaust gas boilers. Exhaust gas boilers with a maximum allowable working pressure...

  13. 46 CFR 52.25-20 - Exhaust gas boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Exhaust gas boilers. 52.25-20 Section 52.25-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING POWER BOILERS Other Boiler Types § 52.25-20 Exhaust gas boilers. Exhaust gas boilers with a maximum allowable working pressure...

  14. 46 CFR 52.25-20 - Exhaust gas boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Exhaust gas boilers. 52.25-20 Section 52.25-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING POWER BOILERS Other Boiler Types § 52.25-20 Exhaust gas boilers. Exhaust gas boilers with a maximum allowable working pressure...

  15. 46 CFR 52.25-20 - Exhaust gas boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Exhaust gas boilers. 52.25-20 Section 52.25-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING POWER BOILERS Other Boiler Types § 52.25-20 Exhaust gas boilers. Exhaust gas boilers with a maximum allowable working pressure...

  16. 46 CFR 52.25-20 - Exhaust gas boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Exhaust gas boilers. 52.25-20 Section 52.25-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING POWER BOILERS Other Boiler Types § 52.25-20 Exhaust gas boilers. Exhaust gas boilers with a maximum allowable working pressure...

  17. Indexes of pumps for oil field pumping units

    SciTech Connect

    Ibragimov, E.S.

    1995-07-01

    As reported previously, a series of oil field pumping units has been developed with power outputs of 125, 250, 500, and 1000 kW, designed for injecting working fluids in cementing operations in oil and gas wells, hydraulic fracturing of formations, washing out sand plugs, and other production operations. The units are designed for the use of three-plunger pumps with individual power outputs of 125 or 500 kW. In the 250- and 1000-kW units, two such pumps are used. The 1000-kW pumping unit serves mainly for deep-penetration hydraulic fracturing of formations, and also for fracturing deep formations. The hydraulic fracturing process does not require the use of units with two pumps; this has been demonstrated by experience, both here and in other countries. All units intended for use in hydraulic fracturing are built with a single pump, transmission, and drive. Pumping units for well cementing must have two pumps that will give a high delivery rate. At the start of the operation, a single pump can be used to feed water into the cement mixer, with the second pump used to transfer the cement slurry to the well. Then both pumps are connected to the slurry injection line. The operation of these pumps is described.

  18. Climate Adaptivity and Field Test of the Space Heating Used Air-Source Transcritical CO2 Heat Pump

    NASA Astrophysics Data System (ADS)

    Song, Yulong; Ye, Zuliang; Cao, Feng

    2017-08-01

    In this study, an innovation of air-sourced transcritical CO2 heat pump which was employed in the space heating application was presented and discussed in order to solve the problem that the heating performances of the transcritical CO2 heat pump water heater deteriorated sharply with the augment in water feed temperature. An R134a cycle was adopted as a subcooling device in the proposed system. The prototype of the presented system was installed and supplied hot water for three places in northern China in winter. The field test results showed that the acceptable return water temperature can be increased up to 55°C, while the supply water temperature was raised rapidly by the presented prototype to up to 70°C directly, which was obviously appropriate to the various conditions of heating radiator in space heating application. Additionally, though the heating capacity and power dissipation decreased with the decline in ambient temperature or the augment in water temperature, the presented heat pump system performed efficiently whatever the climate and water feed temperature were. The real time COP of the presented system was generally more than 1.8 in the whole heating season, while the seasonal performance coefficient (SPC) was also appreciable, which signified that the economic efficiency of the presented system was more excellent than other space heating approaches such as fuel, gas, coal or electric boiler. As a result, the novel system will be a promising project to solve the energy issues in future space heating application.

  19. M.A.N. heat pumps in industry and communities, and their efficiency

    NASA Astrophysics Data System (ADS)

    Griesbach, G.

    1984-06-01

    Heat pumps for refrigeration and heating are described. A gas motor heat pump is used. Large quantities of heat from the cooling water are available for the fabrication of capacitors. Buildings and industry halls are heated with the heat pump with an asynchronous motor/generator. This tandem system allows several combinations for energy supply. The energy concept consists of five, microprocessor controlled, functional units which can be used independently. Installation costs are recouped in 3 yr. The heating system of a school where a gas motor heat pump is combined with a natural gas fired boiler is also described. Division into a high and a low temperature system guarantees efficient operation. Energy saving of 58% compared to a boiler system is obtained. In the heating system of a hospital where a gas motor heat pump is combined with the existing boiler system, energy saving of 50% compared to the previous system is obtained.

  20. PUMP CONSTRUCTION

    DOEpatents

    Strickland, G.; Horn, F.L.; White, H.T.

    1960-09-27

    A pump which utilizes the fluid being pumped through it as its lubricating fluid is described. This is achieved by means of an improved bearing construction in a pump of the enclosed or canned rotor type. At the outlet end of the pump, adjacent to an impeller mechanism, there is a bypass which conveys some of the pumped fluid to a chamber at the inlet end of the pump. After this chamber becomes full, the pumped fluid passes through fixed orifices in the top of the chamber and exerts a thrust on the inlet end of the pump rotor. Lubrication of the rotor shaft is accomplished by passing the pumped fluid through a bypass at the outlet end of the rotor shaft. This bypass conveys Pumped fluid to a cooling means and then to grooves on the surface of the rotor shait, thus lubricating the shaft.

  1. Absorption heat pumps

    NASA Astrophysics Data System (ADS)

    Huhtinen, M.; Heikkilae, M.; Andersson, R.

    1987-03-01

    The aim of the study was to analyze the technical and economic feasibility of absorption heat pumps in Finland. The work was done as a case study: the technical and economic analyses have been carried out for six different cases, where in each the suitable size and type of the heat pump plant and the auxiliary components and connections were specified. The study also detailed the costs concerning the procurement, installation and test runs of the machinery, as well as the savings in energy costs incurred by the introduction of the plant. Conclusions were drawn of the economic viability of the applications studied. The following cases were analyzed: heat recovery from flue gases and productin of district heat in plants using peat, natural gas, and municipal wastes as a fuel. Heat recovery in the pulp and paper industry for the upgrading of pressure of secondary steam and for the heating of white liquor and combustion and drying the air. Heat recovery in a peat-fulled heat and power plant from flue gases that have been used for the drying of peat. According to the study, the absorption heat pump suits best to the production of district heat, when the heat source is the primary energy is steam produced by the boiler. Included in the flue as condensing is the purification of flue gases. Accordingly, benefit is gained on two levels in thick applications. In heat and power plants the use of absorption heat pumps is less economical, due to the fact that the steam used by the pump reduces the production of electricity, which is rated clearly higher than heat.

  2. 5. North/northwest elevations of boiler stack and boiler room. Note ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. North/northwest elevations of boiler stack and boiler room. Note tires on roof to reduce impact of brick work falling from stack. - Lowe Mill, Eighth Avenue, Southwest, Huntsville, Madison County, AL

  3. BOILER HOUSE, 1948 ADDITION, INTERIOR, SECOND FLOOR, BOILER 1A. VACANT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    BOILER HOUSE, 1948 ADDITION, INTERIOR, SECOND FLOOR, BOILER 1-A. VACANT SPACES WERE THE LOCATION OF A SUPPLEMENTAL OIL BURNER. VIEW FROM SOUTH - Lihue Plantation Company, Sugar Mill Building, Haleko Road, Lihue, Kauai County, HI

  4. LPT. Low power test (TAN641) interior. Boiler room with boilers ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LPT. Low power test (TAN-641) interior. Boiler room with boilers installed. Photographer: Jack L. Anderson. Date: November 21, 1957. INEEL negative no. 57-5884 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

  5. Industrial Pumps

    NASA Astrophysics Data System (ADS)

    1986-01-01

    A flow inducer is a device that increases the pump intake capacity of a Worthington Centrifugal pump. It lifts the suction pressure sufficiently for the rotating main impeller of the centrifugal pump to operate efficiently at higher fluid intake levels. The concept derives from 1960's NASA technology which was advanced by Worthington Pump Division. The pumps are used to recirculate wood molasses, a highly viscous substance.

  6. Industrial Pumps

    NASA Technical Reports Server (NTRS)

    1986-01-01

    A flow inducer is a device that increases the pump intake capacity of a Worthington Centrifugal pump. It lifts the suction pressure sufficiently for the rotating main impeller of the centrifugal pump to operate efficiently at higher fluid intake levels. The concept derives from 1960's NASA technology which was advanced by Worthington Pump Division. The pumps are used to recirculate wood molasses, a highly viscous substance.

  7. Results of heat tests of the TGE-435 main boiler in the PGU-190/220 combined-cycle plant of the Tyumen' TETs-2 cogeneration plant

    SciTech Connect

    A.V. Kurochkin; A.L. Kovalenko; V.G. Kozlov; A.I. Krivobok

    2007-01-15

    Special features of operation of a boiler operating as a combined-cycle plant and having its own furnace and burner unit are descried. The flow of flue gases on the boiler is increased due to feeding of exhaust gases of the GTU into the furnace, which intensifies the convective heat exchange. In addition, it is not necessary to preheat air in the convective heating surfaces (the boiler has no air preheater). The convective heating surfaces of the boiler are used for heating the feed water, thus replacing the regeneration extractions of the steam turbine (HPP are absent in the circuit) and partially replacing the preheating of condensate (the LPP in the circuit of the unit are combined with preheaters of delivery water). Regeneration of the steam turbine is primarily used for the district cogeneration heating purposes. The furnace and burner unit of the exhaust-heat boiler (which is a new engineering solution for the given project) ensures utilization of not only the heat of the exhaust gases of the GTU but also of their excess volume, because the latter contains up to 15% oxygen that oxidizes the combustion process in the boiler. Thus, the gas temperature at the inlet to the boiler amounts to 580{sup o}C at an excess air factor a = 3.50; at the outlet these parameters are utilized to T{sub out} = 139{sup o}C and a{sub out} = 1.17. The proportions of the GTU/boiler loads that can actually be organized at the generating unit (and have been checked by testing) are presented and the proportions of loads recommended for the most efficient operation of the boiler are determined. The performance characteristics of the boiler are presented for various proportions of GTU/boiler loads. The operating conditions of the superheater and of the convective trailing heating surfaces are presented as well as the ecological parameters of the generating unit.

  8. Energy storage-boiler tank

    NASA Technical Reports Server (NTRS)

    Chubb, T. A.; Nemecek, J. J.; Simmons, D. E.

    1980-01-01

    Activities performed in an effort to demonstrate heat of fusion energy storage in containerized salts are reported. The properties and cycle life characteristics of a eutectic salt having a boiling point of about 385 C (NaCl, KCl, Mg Cl2) were determined. M-terphenyl was chosen as the heat transfer fluid. Compatibility studies were conducted and mild steel containers were selected. The design and fabrication of a 2MWh storage boiler tank are discussed.

  9. Boiler tube failure reduction program

    SciTech Connect

    Lamping, G.A. ); Jonas, O. ); Niebo, R.J. )

    1991-08-01

    Boiler tube failures are generally recognized as the major cause of forced outages of fossil power generating units for US electric utilities. In almost all cases of serious availability losses, the boiler tube failures are repeat in nature and result in multiple forced outages. Primary factors influencing repeat, rather than random, tube failures are usually found to result from not following state-of-the-art operating, maintenance and/or engineering practices, lack of proper tube failure analysis, wrong choice of corrective/preventive action or solution, and lack of a tube failure reporting and monitoring system. A proven way to prevent costly repeat failures is to implement a formalized Boiler Tube Failure Prevention Program that is supported by senior management and focuses attention and resources on operating, maintenance and engineering controllable parameters that influence repeat tube failures. This report describes such a program, implemented at sixteen utilities under EPRI Research Project RP 1890-7, Boiler Tube Failure Reduction Program.'' Results are presented for ten utilities that began the program in the summer of 1986 with over four years of participation, and for six additional utilities from June of 1988 through December 1990. Both sets of utilities have produced remarkable improvements, the most tangible being substantial reductions in equivalent availability factor losses due to BTF of between 1.5 to 4.5%. Failure mechanism data submitted to the North American Electric Reliability Council (NERC) over the project term has also made it possible to delineate the leading BTF mechanisms causing problems for the participating utilities. Corrosion fatigue, fly ash erosion and high temperature creep accounted for over 28% of the total reported. 3 figs.

  10. Boiler Stack Gas Heat Recovery

    DTIC Science & Technology

    1987-09-01

    Based upon "economic analysis of available options, three cost- effective methods of recovering waste heat were identified: the conventional economizer...upon economic analysis of available options, three cost- effective methods of Continued DO I IA.N1 1473 EDITION OF I NOV AS IS OBSOLETE S Y C O OF...energy loss in a boiler is attributable to the hot flue gas leaving the stack. Thus, the most effective method to save fuel is to recover as much

  11. 6. VIEW WESTINTERIOR OF BOILER SHOP SECTION OF THE BETHLEHEM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW WEST-INTERIOR OF BOILER SHOP SECTION OF THE BETHLEHEM STEEL COMPANY SHIPYARD BLACKSMITH SHOP/BOILER SHOP. - Bethlehem Steel Company Shipyard, Blacksmith Shop-Boiler Shop, 1201-1321 Hudson Street, Hoboken, Hudson County, NJ

  12. 2. VIEW SOUTHWESTNORTH ELEVATION OF BOILER SHOP SECTION OF THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW SOUTHWEST-NORTH ELEVATION OF BOILER SHOP SECTION OF THE BETHLEHEM STEEL COMPANY SHIPYARD BLACKSMITH SHOP/BOILER SHOP. - Bethlehem Steel Company Shipyard, Blacksmith Shop-Boiler Shop, 1201-1321 Hudson Street, Hoboken, Hudson County, NJ

  13. 7. VIEW EASTINTERIOR OF BOILER SHOP SECTION OF THE BETHLEHEM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. VIEW EAST-INTERIOR OF BOILER SHOP SECTION OF THE BETHLEHEM STEEL COMPANY SHIPYARD BLACKSMITH SHOP/BOILER SHOP. - Bethlehem Steel Company Shipyard, Blacksmith Shop-Boiler Shop, 1201-1321 Hudson Street, Hoboken, Hudson County, NJ

  14. 12. Forward end of Boiler Room showing open firing doors ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Forward end of Boiler Room showing open firing doors for boilers. Note ladderway retracted overhead by which firemen entered and left Boiler Room. Coal ejectors shown at extreme left of view. - Ferry TICONDEROGA, Route 7, Shelburne, Chittenden County, VT

  15. Looking east at the boiler water treatment tank located off ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking east at the boiler water treatment tank located off the west wall of the boiler house. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  16. Boiler Emission Compliance Survey, Norton AFB CA

    DTIC Science & Technology

    1989-08-01

    Norton AFB requested AFOEHL assistance to: (1) determine carbon monoxide emissions from each boiler as specified in 40 CFR 60, Appendix A, Reference...Method 10, and (2) determine the oxides of nitrogen emissions from each boiler as specified in 40 CFR 60, Appendix A, Reference Method 7, and for...additional information (3) determine perticulate emissions from each boiler as specified in 40 CFR 60, Appendix A, Reference Methods 1-5. B. Site Description A

  17. Thermal analysis of a solar pond power plant operated with a direct contact boiler

    NASA Astrophysics Data System (ADS)

    Sonn, A.; Letan, R.

    1981-11-01

    A solar pond power plant operated with a direct contact boiler was thermally analyzed. A binary cycle system of concentrated brine, and an organic working fluid were considered. Brine temperature of 80 C, condensation at 30 C, a 75 percent efficient turbine, and 70 percent efficient pumps were specified for the analysis. The current study involved six working fluids: butane, pentane, hexane, and freons R113, R114, R12. Each of these fluids exhibited a maximum efficiency of the system at characteristic operating conditions of the boiler. The system efficiency increased as the boiler pressure approached that of the pond. Net electrical outputs of 7-9 percent of the heat inputs were obtained for the low pressure fluids, such as pentane, hexane, and R113. Gravity flow of brine to boiler increased these values to 8-11 percent. Solute losses in brine by direct contact in boiler were estimated for pentane, as 125 kg per year per sq km of pond, or 63 kg/MWe-year. Similar orders of magnitude are obtained for the other fluids.

  18. Stress-Assisted Corrosion in Boiler Tubes

    SciTech Connect

    Preet M Singh; Steven J Pawel

    2006-05-27

    A number of industrial boilers, including in the pulp and paper industry, needed to replace their lower furnace tubes or decommission many recovery boilers due to stress-assisted corrosion (SAC) on the waterside of boiler tubes. More than half of the power and recovery boilers that have been inspected reveal SAC damage, which portends significant energy and economic impacts. The goal of this project was to clarify the mechanism of stress-assisted corrosion (SAC) of boiler tubes for the purpose of determining key parameters in its mitigation and control. To accomplish this in-situ strain measurements on boiler tubes were made. Boiler water environment was simulated in the laboratory and effects of water chemistry on SAC initiation and growth were evaluated in terms of industrial operations. Results from this project have shown that the dissolved oxygen is single most important factor in SAC initiation on carbon steel samples. Control of dissolved oxygen can be used to mitigate SAC in industrial boilers. Results have also shown that sharp corrosion fatigue and bulbous SAC cracks have similar mechanism but the morphology is different due to availability of oxygen during boiler shutdown conditions. Results are described in the final technical report.

  19. Characteristics of Krakow`s boiler population

    SciTech Connect

    Cyklis, P.; Kowalski, J.; Kroll, J.; Wlodkowski, A.; Zaczkowski, A.; Boron, J.; Butcher, T.

    1994-06-01

    In this paper the characteristics of the local boiler houses and the single-building boilers which are coal-fired are discussed. These sources are seen as particularly important for air quality in Krakow for two reasons. First, these sources have very high emission factors. Unlike the large power plants at Leg and Skawina these smaller boilers do not have high efficiency dust collectors. Also, because of the nature of the boilers they often have high emissions of volatile organics and CO. The second factor which makes these sources so important is their location--very close to residents.

  20. 46 CFR 52.25-5 - Miniature boilers (modifies PMB-1 through PMB-21).

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... ENGINEERING POWER BOILERS Other Boiler Types § 52.25-5 Miniature boilers (modifies PMB-1 through PMB-21). Miniature boilers must meet the applicable provisions in this part for the boiler type involved and the...

  1. 46 CFR 52.25-5 - Miniature boilers (modifies PMB-1 through PMB-21).

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... ENGINEERING POWER BOILERS Other Boiler Types § 52.25-5 Miniature boilers (modifies PMB-1 through PMB-21). Miniature boilers must meet the applicable provisions in this part for the boiler type involved and the...

  2. 46 CFR 52.25-5 - Miniature boilers (modifies PMB-1 through PMB-21).

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... ENGINEERING POWER BOILERS Other Boiler Types § 52.25-5 Miniature boilers (modifies PMB-1 through PMB-21). Miniature boilers must meet the applicable provisions in this part for the boiler type involved and the...

  3. 46 CFR 52.25-5 - Miniature boilers (modifies PMB-1 through PMB-21).

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... ENGINEERING POWER BOILERS Other Boiler Types § 52.25-5 Miniature boilers (modifies PMB-1 through PMB-21). Miniature boilers must meet the applicable provisions in this part for the boiler type involved and the...

  4. 46 CFR 52.25-5 - Miniature boilers (modifies PMB-1 through PMB-21).

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... ENGINEERING POWER BOILERS Other Boiler Types § 52.25-5 Miniature boilers (modifies PMB-1 through PMB-21). Miniature boilers must meet the applicable provisions in this part for the boiler type involved and the...

  5. Solid fuel boiler/incinerator fuel feeder

    SciTech Connect

    Galgana, R.J.; Mahoney, P.F.; Sutin, G.L.

    1988-04-26

    This patent describes an apparatus for feeding a metered flow of solid fuel to a boiler/incinerator operation comprising an upright pair of spaced apart walls constituting respective front and rear hopping defining boundaries, and a pair of belt conveyors each traversing an endless travel course and having upstanding flight members extending crosswise thereon. The upper straight run course of each conveyor travels from bottom to top in the hopper chamber and is operable to transport material from the bottom of a stock of solid waste contained in the chamber. Each conveyor transits a turnaround course at the top of the hopper and discharges the material transported thereby through an associated hopper discharge opening adjacent the turnaround course, and each conveyor has a lower straight run course and a lower turnaround course at the bottom of the hopper. Separate variable speed drive motors connected to each of the conveyors for separating and independently variably controlling the speed of each of the conveyors and correspondingly the rate at which solid waste is transported by a conveyor to its associated hopper discharge opening independently of the rate of which the other conveyor transports waste from the hopper.

  6. The reparation of the burning regime for boiler K4 in the Kolin power station

    SciTech Connect

    Cech, B.; Matousek, J.; Svoboda, J.

    1995-12-31

    In the Kolin power station a boiler with a double-staged fusion chamber is used for hard coal with a heating value of 27 MJ/kg. Since about 1960 the problems with combustion in the chamber have occurred. On the left side of the combustion chamber the combustion regime was correct and a slag flowed out from the boiler as a liquid. In the right side a slag went out in the form of fine-grained particles with a high volume of combustible materials. A study was made to determine the cause of the problem and suggestions for its solution. Modifications were made to the fuel feeding system so that both the right and the left side of the boiler got the same amount of fuel. At the same time, the fineness of fuel milling was improved. These modifications appear to have solved the problem.

  7. Boiler efficiency calculation for multiple fuel burning boilers

    SciTech Connect

    Khodabakhsh, F.; Munukutla, S.; Clary, A.T.

    1996-12-31

    A rigorous method based on the output/loss approach is developed for calculating the coal flow rate for multiple fuel burning boilers. It is assumed that the ultimate analyses of all the fuels are known. In addition, it is assumed that the flow rates of all the fuels with the exception of coal are known. The calculations are performed iteratively, with the first iteration taking into consideration coal as the only fuel. The results converge to the correct answer after a few number of iterations, typically four or five.

  8. Open-cycle vapor compression heat pump

    NASA Astrophysics Data System (ADS)

    Becker, F. E.; Ruggles, A. E.

    A prototype gas-fired steam heat pump was developed. The system utilizes a dry screw compressor driven by a 500-hp natural gas industrial engine. The system can recompress 10,000 lb per hr of clean steam over a 3 to 1 pressure ratio. The fuel consumption of this system is approximately 50 percent that of a direct-fired boiler. A similar size system capable of operating with contaminated steam is also being developed.

  9. Design features of first of its kind AFBC high pressure boiler for Kutch lignite fuel in Gujarat, India

    SciTech Connect

    Diwakar, K.K.; Mokashi, A.H.

    1999-11-01

    Gujarat Heavy Chemicals Limited (GHCL) in Gujarat State in India is one of the largest manufacturers of Soda Ash with modern most technology from Akzo of Neitherland. GHCL with earlier experience of firing of kind of lignite on travagrate boiler and with converted fluidized bed boiler has very clearly identified the problem areas for review and with that rich experience awarded contract to Thermax Babcock and Wilcox Limited (TBW), Pune, India a joint venture company of Thermax Limited, Pune, India and Babcock and Wilcox, USA. Accordingly, boiler has been designed to suit Kutch Lignite and Coal with AFBC Technology, Single Drum Design, top supported with underbed feeding system. Capacity of boiler is 90 Ton/Hr with design pressure of 130 kg/cm{sup 2} with superheated steam temperature of 510 C. This is the first boiler in India with such a high pressure and temperature conditions for this capacity firing lignite. Other first of its kind features include single drum boiler convection bank made with headers and tubes, riffled inbed evaporator tubes, erosion protection by surface coating and not by studs, line bed system for inert material, no soot blowers, specially designed double hinged SS supports for inbed superheater coils etc. This boiler also has a provision of over fire air arrangement for better combustion split. Other unique features include the start-up arrangement by HSD burners which can take the boiler up to 30% load, provision for flue gas recirculation system, specially designed SS air distribution nozzles, separate compartments for under feed, ash drain and air cooled distribution plate with 1:5 turndown. The paper discusses all the above design features.

  10. Heat pumps

    NASA Astrophysics Data System (ADS)

    Gilli, P. V.

    1982-11-01

    Heat pumps for residential/commercial space heating and hot tap water make use of free energy of direct or indirect solar heat and save from about 40 to about 70 percent of energy if compared to a conventional heating system with the same energy basis. In addition, the electrically driven compressor heat pump is able to substitute between 40% (bivalent alternative operation) to 100% (monovalent operation) of the fuel oil of an oilfired heating furnace. For average Central European conditions, solar space heating systems with high solar coverage factor show the following sequence of increasing cost effectiveness: pure solar systems (without heat pumps); heat pump assisted solar systems; solar assisted heat pump systems; subsoil/water heat pumps; air/water heat pumps; air/air heat pumps.

  11. Magnetocaloric pump

    NASA Technical Reports Server (NTRS)

    Brown, G. V.

    1973-01-01

    Very cold liquids and gases such as helium, neon, and nitrogen can be pumped by using magnetocaloric effect. Adiabatic magnetization and demagnetization are used to alternately heat and cool slug of pumped fluid contained in closed chamber.

  12. Combustion of fuel with high fines in Ahlstrom Pyroflow{reg_sign} CFB boilers

    SciTech Connect

    Chelian, P.K.; Gamble, R.

    1995-12-31

    Ahlstrom Pyroflow{reg_sign} boilers have demonstrated the ability of circulating fluidized bed (CFB) boilers to successfully burn unconventional fuels. These boilers have played a major role in the utilization of waste fuels, like bituminous gob and anthracite culm. Many of the waste fuels are processed prior to combustion to increase their heating value. As the technology for combustion of these fuels advanced, so has the desire of the owners to utilize more of the waste fuel and minimize the rejects. In the past, a majority of the fines content (less than 150 microns) was rejected and returned to the piles along with other rejects. In some cases, pond settlings were found to have a reasonably useful heat content, and were a preferred supplement to the anthracite culm. The use of these rejects had one result in common, i.e., to increase the fines content in the fuel feed to the CFB boilers. Pyropower was involved in tests conducted at two boilers, one burning bituminous gob and the other burning processed anthracite culm and silt. These tests were aimed at studying the effect of the high fuel fines content on the CFB boiler performance to determine the maximum practical fines limit. There were concerns of high unburned carbon loss, high CO and high cyclone temperatures. The actual test data confirmed that these boilers could fire a high percent of fines without major concerns. This paper discusses in detail the results of the testing with anthracite culm and silt, and references similar observations made during the testing with high fines bituminous gob.

  13. Sensing system for detection and control of deposition on pendant tubes in recovery and power boilers

    DOEpatents

    Kychakoff, George [Maple Valley, WA; Afromowitz, Martin A [Mercer Island, WA; Hogle, Richard E [Olympia, WA

    2008-10-14

    A system for detection and control of deposition on pendant tubes in recovery and power boilers includes one or more deposit monitoring sensors operating in infrared regions of about 4 or 8.7 microns and directly producing images of the interior of the boiler, or producing feeding signals to a data processing system for information to enable a distributed control system by which the boilers are operated to operate said boilers more efficiently. The data processing system includes an image pre-processing circuit in which a 2-D image formed by the video data input is captured, and includes a low pass filter for performing noise filtering of said video input. It also includes an image compensation system for array compensation to correct for pixel variation and dead cells, etc., and for correcting geometric distortion. An image segmentation module receives a cleaned image from the image pre-processing circuit for separating the image of the recovery boiler interior into background, pendant tubes, and deposition. It also accomplishes thresholding/clustering on gray scale/texture and makes morphological transforms to smooth regions, and identifies regions by connected components. An image-understanding unit receives a segmented image sent from the image segmentation module and matches derived regions to a 3-D model of said boiler. It derives a 3-D structure the deposition on pendant tubes in the boiler and provides the information about deposits to the plant distributed control system for more efficient operation of the plant pendant tube cleaning and operating systems.

  14. Rivesville multicell fluidized bed boiler

    SciTech Connect

    Not Available

    1981-03-01

    One objective of the experimental MFB at Rivesville, WV, was the evaluation of alternate feed systems for injecting coal and limestone into a fluidized bed. A continuous, uniform feed flow to the fluid bed is essential in order to maintain stable operations. The feed system originally installed on the MFB was a gravity feed system with an air assist to help overcome the back pressure created by the fluid bed. The system contained belt, vibrating, and rotary feeders which have been proven adequate in other material handling applications. This system, while usable, had several operational and feeding problems during the MFB testing. A major portion of these problems occurred because the coal and limestone feed control points - a belt feeder and rotary feeder, respectively - were pressurized in the air assist system. These control points were not designed for pressurized service. An alternate feed system which could accept feed from the two control points, split the feed into six equal parts and eliminate the problems of the pressurized system was sought. An alternate feed system designed and built by the Fuller Company was installed and tested at the Rivesville facility. Fuller feed systems were installed on the north and south side of C cell at the Rivesville facility. The systems were designed to handle 10,000 lb/hr of coal and limestone apiece. The systems were installed in late 1979 and evaluated from December 1979 to December 1980. During this time period, nearly 1000 h of operating time was accumulated on each system.

  15. ELECTROMAGNETIC PUMP

    DOEpatents

    Pulley, O.O.

    1954-08-17

    This patent reiates to electromagnetic pumps for electricity-conducting fluids and, in particular, describes several modifications for a linear conduction type electromagnetic interaction pump. The invention resides in passing the return conductor for the current traversing the fiuid in the duct back through the gap in the iron circuit of the pump. Both the maximum allowable pressure and the efficiency of a linear conduction electromagnetic pump are increased by incorporation of the present invention.

  16. Nature's pumps

    NASA Astrophysics Data System (ADS)

    Vogel, Steven

    1994-10-01

    Although diverse in both form and function, the fluid-forcing devices in organisms have many of the capabilities and limitations of pumps of human design. Nature's pumps certainly look quite different from those of our technology, but all of them perform the same task. The author examines a few of these with an eye toward technological parallels and the two functional classes -- positive-displacement pumps and fluid-dynamic pumps.

  17. 46 CFR 109.555 - Propulsion boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Propulsion boilers. 109.555 Section 109.555 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Miscellaneous § 109.555 Propulsion boilers. The master or person in charge and the engineer in charge shall...

  18. Wood fueled boiler financial feasibility user's manual

    Treesearch

    Robert Govett; Scott Bowe; Terry Mace; Steve Hubbard; John (Rusty) Dramm; Richard Bergman

    2005-01-01

    “Wood Fueled Boiler Financial Feasibility” is a spreadsheet program designed for easy use on a personal computer. This program provides a starting point for interested parties to perform financial feasibility analysis of a steam boiler system for space heating or process heat. By allowing users to input the conditions applicable to their current or proposed fuel...

  19. 46 CFR 109.555 - Propulsion boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Propulsion boilers. 109.555 Section 109.555 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Miscellaneous § 109.555 Propulsion boilers. The master or person in charge and the engineer in charge shall...

  20. 46 CFR 109.555 - Propulsion boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Propulsion boilers. 109.555 Section 109.555 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Miscellaneous § 109.555 Propulsion boilers. The master or person in charge and the engineer in charge shall...

  1. 46 CFR 109.555 - Propulsion boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Propulsion boilers. 109.555 Section 109.555 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Miscellaneous § 109.555 Propulsion boilers. The master or person in charge and the engineer in charge shall...

  2. 46 CFR 109.555 - Propulsion boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Propulsion boilers. 109.555 Section 109.555 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Miscellaneous § 109.555 Propulsion boilers. The master or person in charge and the engineer in charge shall...

  3. Baghouse cleans flyash from boiler exhaust

    SciTech Connect

    Not Available

    1981-02-01

    A large baghouse installation recently started up on the boilerhouse of the Avtex Fibers Inc. rayon plant in Front Royal, Virginia. The baghouse removes 99.7% of the flyash particulate from the combustion fumes of five coal-fired boilers. The boilers have a combined capacity of one million lb/h of steam. Emissions from the plant are well below EPA limitations.

  4. Advancement of 10 t/h fluidized bed boiler burning Fujian anthracite with extremely low volatile[ity

    SciTech Connect

    Zhao, C.; Duan, Y.; Chen, X.; Wu, X.; Wu, S.; Wang, W.; Huang, C.

    1999-07-01

    The anthracite in Fujian Province, China with extremely low volatile content about 2--4% is very difficult to burn in grate firing boilers, and operation conditions are very poor, such as steam output well below the nominal capacity and very low burning-out rate. Burning Fujian anthracite in specially designed bubbling fluidized bed (BFB) boilers with capacities between 4 T/H and 20 T/H are still unsatisfactory. In order to increase boiler output and utilize local coal more efficiently, a 10 T/H BFB boiler burning Fujian anthracite was retrofitted with several special techniques, in terms of underbed feeding of recycling fly ash, vortexing secondary air injection, continuous bottom ash removal and adding immersed tube surface. The boiler performances before and after the retrofitting were measured and compared. The experimental results indicate that steam output of the boiler is boosted from 7--8 T/H to more than 14 T/H, unburned carbon content (UBC) in ash from the convective banks drops from 31.39% to 3.89%, UBC in ash from the multicyclone drops from 38.87% to 22.19%, and UBC in fly ash drops from 35.3% to 18.07%. The boiler thermal efficiency increases from 67.27% to 82.93%. Boiler operation becomes more stable. Particulate emission is substantially lessened because of separation by the vortexing secondary air. The retrofitting was completely successful. The technique used and experiences obtained in the retrofitting can be widely applied in industrial BFB boilers.

  5. Selection and design of a primary and secondary paper mill sludge-fired boiler

    SciTech Connect

    Schaller, B.; Jauhiainen, E.

    1996-12-31

    To meet the new federal and provincial regulations at its Clermont newsprint facility, Donohue St-Felicien, Inc. of Quebec elected to build a secondary effluent treatment system combining activated sludge technology with fluidized bed combustion technology. In late February, 1994, a contract was awarded to Pyropower Corporation (now Foster Wheeler Pyropower, Inc.) to design and construct a bubbling fluidized bed boiler which would be fueled by a combination of primary and secondary paper mill sludge. The boiler is designed to fire 100% sludge without supplemental fuel. Heavy oil is used for start-up and as an auxiliary fuel when sludge moisture is excessive. Start-up of the boiler commenced on 01 May 1995, and full load was reached on 18 June 1995. This paper examines the options available to dispose of the paper mill effluent treatment sludge; the reasons for selecting bubbling bed combustion; and key design features of the boiler, feed, sand and ash handling systems. Additionally, the effects of firing paper sludge in a power boiler, combustion technology options, and environmental aspects are also discussed, as well as startup and operational experience.

  6. Design of a 37 kw waste-fired pump engine

    SciTech Connect

    Abernathy, G.H.; Patterson, R.S.

    1981-01-01

    High Cost and possible shortages of irrigation pumping fuel are prompted the evaluation of alternate fuel engines. This engine is a steam turbine powered by a milo-stalk-fired boiler. Some short runs were accomplished in 1982 but further design will be required. ref.

  7. Latest Development of CFB Boilers in China

    NASA Astrophysics Data System (ADS)

    Yue, G. X.; Yang, H. R.; Lu, J. F.; Zhang, H.

    The circulating fluidized bed (CFB) coal-fired boiler has being rapidly developed in China since 1980s and becomes a key clean coal technology used in thermal and power generation. In this paper, the development history and development status of the CFB boiler in China are introduced. The development history of the CFB boiler in China is divided into four periods and the important features of each period are given. Some latest research activities and important results on CFB boilers, and the typical achievements and newest development of the CFB boiler in China are also introduced. In addition, a few challenges and development directions including the capacity scaling up, SO2 removal and energy saving are discussed.

  8. PAH emission from the industrial boilers.

    PubMed

    Li, C; Mi, H; Lee, W; You, W; Wang, Y

    1999-10-01

    Polycyclic aromatic hydrocarbons (PAHs) emitted from 25 industrial boilers were investigated. The fuels used for these 25 boilers included 21 heavy oil, two diesel, a co-combustion of heavy oil and natural gas (HO+NG) and a co-combustion of coke oven gas and blast furnace gas (COG+BFG) boilers. PAH samples from the stack flue gas (gas and particle phases) of these 25 boilers were collected by using a PAH stack sampling system. Twenty one individual PAHs were analyzed primarily by a gas chromatography/mass spectrometer (GC/MS). Total-PAH concentration in the flue gas of 83 measured data for these 25 boiler stacks ranged between 29.0 and 4250 microg/m(3) and averaged 488 microg/m(3). The average of PAH-homologue mass (F%) counted for the total-PAH mass was 54.7%, 9.47% and 15.3% for the 2-ring, 3-ring and 4-ring PAHs, respectively. The PAHs in the stack flue gas were dominant in the lower molecular weight PAHs. The emission factors (EFs) of total-PAHs were 13,300, 2920, 2880 and 208 microg/kg-fuel for the heavy oil, diesel, HO+NG and COG+BFG fueled-boiler, respectively. Nap was the most predominant PAH occurring in the stack flue gas. In addition, the EF of 21 individual PAHs in heavy-oil boiler were almost the highest among the four various fueled-boilers except for those of FL and BkF in the diesel boiler. Furthermore, the EF of total-PAHs or BaP for heavy oil were both one order of magnitude higher than that for the diesel-fueled boiler.

  9. OSCILLATORY PUMP

    DOEpatents

    Underwood, N.

    1958-09-23

    This patent relates to a pump suitable fur pumping highly corrosive gases wherein no lubricant is needed in the pumping chamber thus eliminating possible contamination sources. The chamber contains a gas inlet and outlet in each side, with a paddle like piston suspended by a sylphon seal between these pcrts. An external arrangement causes the paddle to oscillate rapidly between the ports, alternately compressing and exhausting the gas trapped on each side of the paddle. Since the paddle does nnt touch the chamber sides at any point, no lubricant is required. This pump is useful for pumping large quantities of uranium hexafluorine.

  10. 40 CFR 65.149 - Boilers and process heaters.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... thermal units per hour) or greater. (ii) A boiler or process heater into which the vent stream is... 40 Protection of Environment 15 2010-07-01 2010-07-01 false Boilers and process heaters. 65.149... System or a Process § 65.149 Boilers and process heaters. (a) Boiler and process heater equipment...

  11. Looking east at the west wall of the boiler house, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking east at the west wall of the boiler house, boiler water treatment tank, and waste gas stack. Water tower is to the left of the boiler house. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  12. Retrofitted coal-fired firetube boiler and method employed therewith

    DOEpatents

    Wagoner, Charles L.; Foote, John P.

    1995-01-01

    A coal-fired firetube boiler and a method for converting a gas-fired firetube boiler to a coal-fired firetube boiler, the converted boiler including a plurality of combustion zones within the firetube and controlled stoichiometry within the combustion zones.

  13. Retrofitted coal-fired firetube boiler and method employed therewith

    DOEpatents

    Wagoner, C.L.; Foote, J.P.

    1995-07-04

    A coal-fired firetube boiler and a method for converting a gas-fired firetube boiler to a coal-fired firetube boiler are disclosed. The converted boiler includes a plurality of combustion zones within the firetube and controlled stoichiometry within the combustion zones. 19 figs.

  14. 24. VIEW OF FIRING AISLE OF EAST BOILER ROOM LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. VIEW OF FIRING AISLE OF EAST BOILER ROOM LOOKING SOUTH. BOILERS 900 AND 901 ARE ON THE RIGHT, BOILERS 902, 903, AND 904 ARE ON THE LEFT. NOTE REMAINS OF THE LARRY CAR TRACK SYSTEM FOR TRANSFERRING COAL TO BOILER HOPPERS ABOVE THE AISLE. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  15. 49 CFR 230.36 - Hydrostatic testing of boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Hydrostatic testing of boilers. 230.36 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Pressure Testing of Boilers § 230.36 Hydrostatic testing of boilers. (a) Time of test....

  16. 40 CFR 65.149 - Boilers and process heaters.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 15 2011-07-01 2011-07-01 false Boilers and process heaters. 65.149... System or a Process § 65.149 Boilers and process heaters. (a) Boiler and process heater equipment and operating requirements. (1) Owners or operators using boilers and process heaters to meet the 98...

  17. 46 CFR 61.05-15 - Boiler mountings and attachments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Boiler mountings and attachments. 61.05-15 Section 61.05... TESTS AND INSPECTIONS Tests and Inspections of Boilers § 61.05-15 Boiler mountings and attachments. (a....05-10. (b) Each stud or bolt for each boiler mounting that paragraph (c) of this section requires...

  18. 49 CFR 230.36 - Hydrostatic testing of boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Hydrostatic testing of boilers. 230.36 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Pressure Testing of Boilers § 230.36 Hydrostatic testing of boilers. (a) Time of test....

  19. 49 CFR 230.30 - Lap-joint seam boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Lap-joint seam boilers. 230.30 Section 230.30..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Inspection and Repair § 230.30 Lap-joint seam boilers. Every boiler having lap-joint longitudinal...

  20. 49 CFR 230.30 - Lap-joint seam boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Lap-joint seam boilers. 230.30 Section 230.30..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Inspection and Repair § 230.30 Lap-joint seam boilers. Every boiler having lap-joint longitudinal...

  1. 46 CFR 61.05-15 - Boiler mountings and attachments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Boiler mountings and attachments. 61.05-15 Section 61.05... TESTS AND INSPECTIONS Tests and Inspections of Boilers § 61.05-15 Boiler mountings and attachments. (a....05-10. (b) Each stud or bolt for each boiler mounting that paragraph (c) of this section requires...

  2. 49 CFR 230.30 - Lap-joint seam boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Lap-joint seam boilers. 230.30 Section 230.30..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Inspection and Repair § 230.30 Lap-joint seam boilers. Every boiler having lap-joint longitudinal...

  3. 49 CFR 230.36 - Hydrostatic testing of boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Hydrostatic testing of boilers. 230.36 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Pressure Testing of Boilers § 230.36 Hydrostatic testing of boilers. (a) Time of test....

  4. 49 CFR 230.36 - Hydrostatic testing of boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Hydrostatic testing of boilers. 230.36 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Pressure Testing of Boilers § 230.36 Hydrostatic testing of boilers. (a) Time of test....

  5. 46 CFR 61.05-15 - Boiler mountings and attachments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Boiler mountings and attachments. 61.05-15 Section 61.05... TESTS AND INSPECTIONS Tests and Inspections of Boilers § 61.05-15 Boiler mountings and attachments. (a....05-10. (b) Each stud or bolt for each boiler mounting that paragraph (c) of this section requires...

  6. 49 CFR 230.36 - Hydrostatic testing of boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Hydrostatic testing of boilers. 230.36 Section 230... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Pressure Testing of Boilers § 230.36 Hydrostatic testing of boilers. (a) Time of test....

  7. 40 CFR 65.149 - Boilers and process heaters.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 16 2013-07-01 2013-07-01 false Boilers and process heaters. 65.149... System or a Process § 65.149 Boilers and process heaters. (a) Boiler and process heater equipment and operating requirements. (1) Owners or operators using boilers and process heaters to meet the 98...

  8. 40 CFR 65.149 - Boilers and process heaters.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 16 2014-07-01 2014-07-01 false Boilers and process heaters. 65.149... System or a Process § 65.149 Boilers and process heaters. (a) Boiler and process heater equipment and operating requirements. (1) Owners or operators using boilers and process heaters to meet the 98...

  9. 40 CFR 65.149 - Boilers and process heaters.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 16 2012-07-01 2012-07-01 false Boilers and process heaters. 65.149... System or a Process § 65.149 Boilers and process heaters. (a) Boiler and process heater equipment and operating requirements. (1) Owners or operators using boilers and process heaters to meet the 98...

  10. Thermoelectricity in Self-Contained Heating and Boiler Systems

    NASA Astrophysics Data System (ADS)

    Anatychuk, L. I.; Mykhailovsky, V. Ya.; Strutynska, L. T.

    2010-09-01

    The use of thermoelectric generators (TEGs) in heating systems enables autonomous supply of power to automatic safety devices, creation of optimized gas mixtures, and automation and precise temperature control of exhaust gas and heat carriers. It is particularly important to make heating systems independent of the district electric grid. Results of research and development efforts on a TEG for supplying power to electric devices of self-contained heating and boiler systems are presented. A TEG physical model is proposed, and results of computer simulation and optimization of its basic power and design parameters are given. Two TEG design variants (single and double sided) are considered. Their advantages and shortcomings are discussed. On the basis of theoretical calculations, a prototype TEG for a 10.5-kW boiler is built. At water heating system temperatures from 35°C to 80°C, the TEG electric power is 50 W to 65 W, which is used to supply a circulation pump for forced liquid heat carrier delivery (30 W to 40 W) and a fan for removal of fuel combustion products from the boiler’s smoke chamber (5 W to 7 W).

  11. Numerical Simulation in a Supercirtical CFB Boiler

    NASA Astrophysics Data System (ADS)

    Zhang, Yanjun; Gaol, Xiang; Luo, Zhongyang; Jiang, Xiaoguo

    The dimension of the hot circulation loop of the supercritical CFB boiler is large, and there are many unknowns and challenges that should be identified and resolved during the development. In order to realize a reasonable and reliable design of the hot circulation loop, numerical simulation of gas-solid flow in a supercritical CFB boiler was conducted by using FLUENT software. The working condition of hot circulation loop flow field, gas-solid flow affected by three unsymmetrical cyclones, air distribution and pressure drop in furnace were analyzed. The simulation results showed that the general arrangement of the 600MWe supercritical CFB boiler is reasonable.

  12. Resource recovery waste heat boiler upgrade

    SciTech Connect

    Kuten, P.; McClanahan, D.E.; Gehring, P.R.; Toto, M.L.; Davis, J.J.

    1996-09-01

    The waste heat boilers installed in a 360 TPD waste to energy plant were identified as the bottle neck for an effort to increase plant capacity. These boilers were successfully modified to accommodate the increase of plant capacity to 408 TPD, improve steam cycle performance and reduce boiler tube failures. The project demonstrated how engineering and operation can work together to identify problems and develop solutions that satisfy engineering, operation, and financial objectives. Plant checking and testing, design review and specification development, installation and operation results are presented.

  13. Exploiting the On-Campus Boiler House.

    ERIC Educational Resources Information Center

    Woods, Donald R.; And Others

    1986-01-01

    Shows how a university utility building ("boiler house") is used in a chemical engineering course for computer simulations, mathematical modeling and process problem exercises. Student projects involving the facility are also discussed. (JN)

  14. Exploiting the On-Campus Boiler House.

    ERIC Educational Resources Information Center

    Woods, Donald R.; And Others

    1986-01-01

    Shows how a university utility building ("boiler house") is used in a chemical engineering course for computer simulations, mathematical modeling and process problem exercises. Student projects involving the facility are also discussed. (JN)

  15. New thinking for the boiler room.

    PubMed

    Rose, Wayne

    2008-09-01

    Wayne Rose, marketing manager at integrated plant room manufacturer Armstrong Integrated Systems, explains how increasing use of off-site manufacture, the latest 3D modelling technology, and advances in control technology, are revolutionising boiler room design and construction.

  16. Boiler scale prevention employing an organic chelant

    DOEpatents

    Wallace, Steven L.; Griffin, Jr., Freddie; Tvedt, Jr., Thorwald J.

    1984-01-01

    An improved method of treating boiler water which employs an oxygen scavenging compound and a compound to control pH together with a chelating agent, wherein the chelating agent is hydroxyethylethylenediaminetriacetic acid.

  17. Iron aluminide weld overlay coatings for boiler tube protection in coal-fired low NOx boilers

    SciTech Connect

    Banovic, S.W.; DuPont, J.N.; Marder, A.R.

    1997-12-01

    Iron aluminide weld overlay coatings are currently being considered for enhanced sulfidation resistance in coal-fired low NO{sub x} boilers. The use of these materials is currently limited due to hydrogen cracking susceptibility, which generally increases with an increase in aluminum concentration of the deposit. The overall objective of this program is to attain an optimum aluminum content with good weldability and improved sulfidation resistance with respect to conventional materials presently in use. Research has been initiated using Gas Tungsten Arc Welding (GTAW) in order to achieve this end. Under different sets of GTAW parameters (wire feed speed, current), both single and multiple pass overlays were produced. Characterization of all weldments was conducted using light optical microscopy, scanning electron microscopy, and electron probe microanalysis. Resultant deposits exhibited a wide range of aluminum contents (5--43 wt%). It was found that the GTAW overlays with aluminum contents above {approximately}10 wt% resulted in cracked coatings. Preliminary corrosion experiments of 5 to 10 wt% Al cast alloys in relatively simple H{sub 2}/H{sub 2}S gas mixtures exhibited corrosion rates lower than 304 stainless steel.

  18. Boiler burden reduced at Bedford site.

    PubMed

    Horsley, Chris

    2011-10-01

    With the NHS aiming to reduce its 2007 carbon footprint by 10% by 2015, Chris Horsley, managing director of Babcock Wanson UK, a provider of industrial boilers and burners, thermal oxidisers, air treatment, water treatment, and associated services, looks at how one NHS Trust has approached the challenge, and considerably reduced its carbon emissions, by refurbishing its boiler house and moving from oil to gas-fired steam generation.

  19. Impulse Pump

    DTIC Science & Technology

    2016-06-17

    APPLICATIONS [0002] None. BACKGROUND OF THE INVENTION (1) Field of the Invention [0003] The present invention relates to an impulse pump for generating...impulse pump 15. The sleeve bearings 98 are affixed to the head block 90 to ease axial motion while the plunger 72 is under torsional loads. [0041

  20. Research and Development of Large Capacity CFB Boilers in TPRI

    NASA Astrophysics Data System (ADS)

    Xianbin, Sun; Minhua, Jiang

    This paper presents an overview of advancements of circulating fluidized bed (CFB) technology in Thermal Power Research Institute (TPRI),including technologies and configuration and progress of scaling up. For devoloping large CFB boiler, the CFB combustion test facilities have been established, the key technologies of large capacity CFB boiler have been research systematically, the 100MW ˜330MW CFB boiler have been developed and manufactured. The first domestically designed 100MW and 210MW CFB boiler have been put into commericial operation and have good operating performance. Domestic 330MW CFB boiler demonstration project also has been put into commericial operation,which is H type CFB boiler with Compact heat exchanger. This boiler is China's largest CFB boiler. The technical plan of domestic 600MW supercritical CFB boiler are also briefly introduced.

  1. Pumping system

    SciTech Connect

    Kime, J.A.

    1987-05-19

    This patent describes a gas-oil production system for pumping formation fluid in a well through a tubing string within which a down hole pump connects to a hydraulic stroking device through a rod string providing the pump including a plunger reciprocally driven by the hydraulic stroking device toward an upper terminal position during a plunger upstroke. The rod string normally supports the weight of a column of fluid and toward a lower terminal position at the end of a plunger downstroke during which the weight of the column fluid is normally transferred to the tubing string through fluid within the pump. The method for detecting when the well is pumped off comprises: supplying working fluid to the hydraulic stroking device to raise the hydraulic stroking device and thereby move the plunger from the lower terminal position to the upper terminal position; and removing the working fluid at a controlled rate from the hydraulic stroking device.

  2. Ferroelectric Pump

    NASA Technical Reports Server (NTRS)

    Jalink, Antony, Jr. (Inventor); Hellbaum, Richard F. (Inventor); Rohrbach, Wayne W. (Inventor)

    2000-01-01

    A ferroelectric pump has one or more variable volume pumping chambers internal to a housing. Each chamber has at least one wall comprising a dome shaped internally prestressed ferroelectric actuator having a curvature and a dome height that varies with an electric voltage applied between an inside and outside surface of the actuator. A pumped medium flows into and out of each pumping chamber in response to displacement of the ferroelectric actuator. The ferroelectric actuator is mounted within each wall and isolates each ferroelectric actuator from the pumped medium, supplies a path for voltage to be applied to each ferroelectric actuator, and provides for positive containment of each ferroelectric actuator while allowing displacement of the entirety of each ferroelectric actuator in response to the applied voltage.

  3. Axial Pump

    NASA Technical Reports Server (NTRS)

    Bozeman, Richard J., Jr. (Inventor); Akkerman, James W. (Inventor); Aber, Gregory S. (Inventor); VanDamm, George Arthur (Inventor); Bacak, James W. (Inventor); Svejkovsky, Paul A. (Inventor); Benkowski, Robert J. (Inventor)

    1997-01-01

    A rotary blood pump includes a pump housing for receiving a flow straightener, a rotor mounted on rotor bearings and having an inducer portion and an impeller portion, and a diffuser. The entrance angle, outlet angle, axial and radial clearances of blades associated with the flow straightener, inducer portion, impeller portion and diffuser are optimized to minimize hemolysis while maintaining pump efficiency. The rotor bearing includes a bearing chamber that is filled with cross-linked blood or other bio-compatible material. A back emf integrated circuit regulates rotor operation and a microcomputer may be used to control one or more back emf integrated circuits. A plurality of magnets are disposed in each of a plurality of impeller blades with a small air gap. A stator may be axially adjusted on the pump housing to absorb bearing load and maximize pump efficiency.

  4. Foster Wheeler compact CFB boiler with INTREX

    SciTech Connect

    Hyppaenen, T.; Rainio, A.; Kauppinen, K.V.O.; Stone, J.E.

    1997-12-31

    Foster Wheeler has introduced a new COMPACT Circulating Fluidized Bed (CFB) boiler design based on the rectangular hot solids separator. The Compact design also enables easy implementation of new designs for INTREX fluid bed heat exchangers. These new products result in many benefits which affect the boiler economy and operation. After initial development of the Compact CFB design it has been applied in demonstration and industrial scale units. The performance of Compact CFB has been proved to be equivalent to conventional Foster Wheeler CFB has been proved to be equivalent to conventional Foster Wheeler CFB boilers with high availability. Several new Foster Wheeler Compact boilers are being built or already in operation. Operational experiences from different units will be discussed in this paper. There are currently Compact units with 100--150 MW{sub e} capacity under construction. With the scale-up experience with conventional CFB boilers and proven design approach and scale-up steps, Foster Wheeler will have the ability to provide large Compact CFB boilers up to 400--600 MW{sub e} capacity.

  5. Chemical cleaning clears San Miguel's boiler tubes

    SciTech Connect

    Buecker, B.; Wofford, J. ); Magel, R. )

    1994-06-01

    This article describes chemical cleaning of the San Miguel Electric Cooperative (SMEC) boiler, an opposed-fired, natural circulation, reheat unit. At maximum continuous rating, steam flow is 3,054,000 lb/hr at a pressure of 2,925 psig. The superheater and reheater design temperatures are both 1,005 F. Boiler volume is 69,000 gallons. The Unit 1 boiler had not been cleaned since 1980, its original start-up date. Tube sample analyses indicated deposit densities ranging from 12 to 26 grams/ft[sup 2]. Utility boiler tubes will, over time, accumulate an internal layer of iron oxides and other deposits that inhibit flow and heat transfer, even with well-controlled water chemistry. Tube deposits can speed up corrosion, cause tube overheating, and be a precursor to tube failure. Deposits can influence such phenomena as phosphate hideout, and reduce boiler efficiency. For many utility boilers, a periodic cleaning is necessary to remove internal deposits before they can cause serious problems. Regardless of the benefits, chemical cleanings often make plant managers, engineers, and operators anxious because the process has been known to cause equipment damage or extend the length of an outage.

  6. Assessment of physical workload in boiler operations.

    PubMed

    Rodrigues, Valéria Antônia Justino; Braga, Camila Soares; Campos, Julio César Costa; Souza, Amaury Paulo de; Minette, Luciano José; Sensato, Guilherme Luciano; Moraes, Angelo Casali de; Silva, Emília Pio da

    2012-01-01

    The use of boiler wood-fired is fairly common equipment utilized in steam generation for energy production in small industries. The boiler activities are considered dangerous and heavy, mainly due to risks of explosions and the lack of mechanization of the process. This study assessed the burden of physical labor that operators of boilers are subjected during the workday. Assessment of these conditions was carried out through quantitative and qualitative measurements. A heart rate monitor, a wet-bulb globe thermometer (WBGT), a tape-measure and a digital infrared camera were the instruments used to collect the quantitative data. The Nordic Questionnaire and the Painful Areas Diagram were used to relate the health problems of the boiler operator with activity. With study, was concluded that the boiler activity may cause pains in the body of intensity different, muscle fatigue and diseases due to excessive weight and the exposure to heat. The research contributed to improve the boiler operator's workplace and working conditions.

  7. {open_quotes}The next generations of Tampella Power`s CFB boilers{close_quotes}

    SciTech Connect

    Alliston, M.G.

    1995-12-31

    The next generation of Tampella Power Corporation`s CFB boilers is discussed in outline form. The following topics are outlined: CFB boiler advantages, CFB boiler fuel flexibility and CYMIC boiler construction.

  8. 33. VIEW OF BASEMENT UNDER EAST BOILER ROOM LOOKING TOWARD ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. VIEW OF BASEMENT UNDER EAST BOILER ROOM LOOKING TOWARD WEST BOILER ROOM BASEMENT THROUGH THE ASH TRANSFER TUNNEL. ASH HOPPER FOR BOILER 900 IS ON THE RIGHT. NOTE THE TRACKS ALONG THE FLOOR OF THE TUNNEL. A SMALL ELECTRIC LOCOMOTIVE HAULED CARS FOR TRANSFERRING ASH FROM BOILERS TO DISPOSAL SITES OUTSIDE THE BUILDING. THIS SYSTEM BECAME OBSOLETE IN 1938 WHEN BOILERS IN THE WEST BOILER ROOM WERE REMOVED AND PULVERIZED COAL WAS ADOPTED AS THE FUEL. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  9. Open-cycle vapor compression heat pump

    NASA Astrophysics Data System (ADS)

    Sakhuja, R.; Becker, F. E.

    1981-05-01

    Recovery and upgrading of low-grade steam or waste heat sources offers a great potential of energy conservation. Thermo Electron is developing an open cycle vapor compression steam heat pump to meet this objective. The system utilizes excess low-pressure steam or that produced from an industrial excess heat source with a waste heat boiler and compresses this steam to the desired pressure level for process use. The compressor is driven by a prime mover such as a gas turbine, gas engine, etc. The prime mover exhaust heat also can be recovered to generate additional process steam. The fuel consumption of this system can be as low as 30 to 50 percent in comparison to a direct-fired boiler over the expected range of process conditions. Simple payback periods as low as one year can be achieved.

  10. Analysis of selected problems of biomass combustion process in batch boilers - experimental and numerical approach

    NASA Astrophysics Data System (ADS)

    Szubel, Mateusz

    2016-03-01

    It is possible to list numerous groups of heating units that are used in households, such as boilers, stoves and units used as supporting heat sources, namely fireplaces. In each case, however, the same operational problems may be evoked [1]. To understand the causes of energy losses in a boiler system, a proper definition of significant elements of the unit's heat balance is necessary. In the group of energy losses, the flue gas loss and the incomplete combustion loss are the most significant factors. The problem with the loss resulting from incomplete combustion, which is related to the presence of combustible substances in the exhaust, is especially significant in case of biomass boilers [2, 3]. The paper presents results of the research and the optimisation of the biomass combustion process in the 180 kW batch boiler. The studies described have been focused on the reduction of the pollutants emission, which was primarily realised by the modifications of the air feeding system. Results of the experiments and the CFD simulations have been compared and discussed. Both in case of the model as well as the experiment, positive influence of the modifications on the emission have been observed.

  11. Submersible pump

    SciTech Connect

    Todd, D. B.

    1985-08-27

    A method and apparatus for using a submersible pump to lift reservoir fluids in a well while having the tubing/casing annulus isolated from the produced fluids. The apparatus allows the submersible pump to be positioned above the annular packoff device. The apparatus comprises an outer shield that encloses the pump and can be attached to the production tubing. The lower end of the shield attaches to a short tubing section that seals with the annular packoff device or a receptacle above the annular packoff device.

  12. Small centrifugal pumps for low thrust rockets

    NASA Technical Reports Server (NTRS)

    Gulbrandsen, N. C.; Furst, R. B.; Burgess, R. M.; Scheer, D. D.

    1985-01-01

    This paper presents the results of a combined analytical and experimental investigation of low specific speed pumps for potential use as components of propellant feed systems for low thrust rocket engines. Shrouded impellers and open face impellers were tested in volute type and vaned diffuser type pumps. Full- and partial-emission diffusers and full- and partial-admission impellers were tested. Axial and radial loads, head and efficiency versus flow, and cavitation tests were conducted. Predicted performance of two pumps are compared when pumping water and liquid hydrogen. Detailed pressure loss and parasitic power values are presented for two pump configurations. Partial-emission diffusers were found to permit use of larger impeller and diffuser passages with a minimal performance penalty. Normal manufacturing tolerances were found to result in substantial power requirement variation with only a small pressure rise change. Impeller wear ring leakage was found to reduce pump pressure rise to an increasing degree as the pump flowrate was decreased.

  13. Small centrifugal pumps for low thrust rockets

    NASA Technical Reports Server (NTRS)

    Gulbrandsen, N. C.; Furst, R. B.; Burgess, R. M.; Scheer, D. D.

    1985-01-01

    This paper presents the results of a combined analytical and experimental investigation of low specific speed pumps for potential use as components of propellant feed systems for low thrust rocket engines. Shrouded impellers and open face impellers were tested in volute type and vaned diffuser type pumps. Full- and partial-emission diffusers and full- and partial-admission impellers were tested. Axial and radial loads, head and efficiency versus flow, and cavitation tests were conducted. Predicted performance of two pumps are compared when pumping water and liquid hydrogen. Detailed pressure loss and parasitic power values are presented for two pump configurations. Partial-emission diffusers were found to permit use of larger impeller and diffuser passages with a minimal performance penalty. Normal manufacturing tolerances were found to result in substantial power requirement variation with only a small pressure rise change. Impeller wear ring leakage was found to reduce pump pressure rise to an increasing degree as the pump flowrate was decreased.

  14. Fuel sulfur and boiler fouling

    SciTech Connect

    Litzke, W.; Celebi, Y.; Butcher, T.

    1995-04-01

    Fouling of the heat transfer surfaces of boilers and furnaces by `soot` leads to reduced efficiency and increased service requirements. The average level of annual efficiency reduction as a result of fouling if generally accepted as 2% per year. Improving the efficiency of equipment in the field may be the most important oil heat conservation opportunity at present. Improvements can be realized by reducing fouling rates, promoting lower firing rates in existing equipment, and enabling excess air levels to be set lower without raising concerns about increased service requirements. In spite of the importance of efficiency in the field there is very little data available on efficiency degradation rates with modern equipment, actual field operating conditions (excess air and smoke number settings) and service problems which affect efficiency. During 1993-94 field tests were initiated to obtain such data and to obtain information that would compliment existing and current laboratory work. Experimental work conducted on a bench scale level have included tests with various advanced burners, fuel types, and different operating conditions which have been done at the BNL Rapid Fouling Test Facility. This report will focus on the field study of fouling effects on ten residential heating service problems at each site are summarized. In addition, the technical difficulties involved with conducting such a field study shall also be discussed as the findings should serve to improve future work in this area.

  15. Electrokinetic pump

    DOEpatents

    Patel, Kamlesh D.

    2007-11-20

    A method for altering the surface properties of a particle bed. In application, the method pertains particularly to an electrokinetic pump configuration where nanoparticles are bonded to the surface of the stationary phase to alter the surface properties of the stationary phase including the surface area and/or the zeta potential and thus improve the efficiency and operating range of these pumps. By functionalizing the nanoparticles to change the zeta potential the electrokinetic pump is rendered capable of operating with working fluids having pH values that can range from 2-10 generally and acidic working fluids in particular. For applications in which the pump is intended to handle highly acidic solutions latex nanoparticles that are quaternary amine functionalized can be used.

  16. ION PUMP

    DOEpatents

    Milleron, N.

    1961-01-01

    An ion pump and pumping method are given for low vacuum pressures in which gases introduced into a pumping cavity are ionized and thereafter directed and accelerated into a quantity of liquid gettering metal where they are absorbed. In the preferred embodiment the metal is disposed as a liquid pool upon one electrode of a Phillips ion gauge type pump. Means are provided for continuously and remotely withdrawing and degassing the gettering metal. The liquid gettering metal may be heated if desired, although various combinations of gallium, indium, tin, bismuth, and lead, the preferred metals, have very low melting points. A background pressure of evaporated gettering metal may be provided by means of a resistance heated refractory metal wick protruding from the surface of the pcol of gettering metal.

  17. Slurry pumping: Pump performance prediction

    SciTech Connect

    Taccani, R.; Pediroda, V.; Reini, M.; Giadrossi, A.

    2000-07-01

    Centrifugal pumps are being used increasingly for transportation of slurries through pipelines. To design a slurry handling system it is essential to have a knowledge of the effects of suspended solids on the pump performance. A new test loop has been realized in the laboratory of the Energetics Department of the University of Trieste which allows pump performance to be determined at various pump speeds, with many different mixture concentrations and rheologies. The pump test rig consists of 150 mm diameter pipe with facilities for measuring suction and discharge pressure, flowrate, pump input power and speed, slurry density and temperature. In particular flowrate is measured by diverting flow into a weighing tank and timing a specified volume of slurry. An automatic PC based data acquisition system has been implemented. Preliminary tests with clear water show that performance can be measured with good repeatability and accuracy. The new test rig is used to verify the range of validity of the correlations to predict pump performance, available in literature and of that proposed by authors. This correlation, based on a Neural Network and not on a predefined analytical expression, can be easily improved with new experimental data.

  18. Which Breast Pump for Which Mother: An Evidenced-Based Approach to Individualizing Breast Pump Technology

    PubMed Central

    Meier, Paula P.; Patel, Aloka L.; Hoban, Rebecca; Engstrom, Janet L.

    2015-01-01

    The majority of new mothers in the United States use breast pumps in the first four months post-birth in order to achieve their personal human milk feeding goals. Although these mothers seek guidance from health care professionals with respect to the type and use of breast pumps, there are few evidence-based guidelines to guide this professional advice. This paper reviews the evidence to facilitate professional individualization of breast pump recommendations using three categories of literature: the infant as the gold standard to which the pump is compared; the degree of maternal breast pump dependency (e.g., the extent to which the breast pump replaces the infant for milk removal and mammary gland stimulation); and the stage of lactation for which the pump replaces the infant. This review can also serve to inform public and private payers with respect to individualizing breast pump type to mother-dyad characteristics. PMID:26914013

  19. Which breast pump for which mother: an evidence-based approach to individualizing breast pump technology.

    PubMed

    Meier, P P; Patel, A L; Hoban, R; Engstrom, J L

    2016-07-01

    The majority of new mothers in the United States use breast pumps in the first 4 months postbirth in order to achieve their personal human milk feeding goals. Although these mothers seek guidance from health-care professionals with respect to the type and use of breast pumps, there are few evidence-based guidelines to guide this professional advice. This paper reviews the evidence to facilitate professional individualization of breast pump recommendations using three categories of literature: the infant as the gold standard to which the pump is compared; the degree of maternal breast pump dependency (for example, the extent to which the breast pump replaces the infant for milk removal and mammary gland stimulation); and the stage of lactation for which the pump replaces the infant. This review can also serve to inform public and private payers with respect to individualizing breast pump type to mother-infant dyad characteristics.

  20. Fuel pump

    SciTech Connect

    Bellis, P.D.; Nesselrode, F.

    1991-04-16

    This patent describes a fuel pump. It includes: a fuel reservoir member, the fuel reservoir member being formed with fuel chambers, the chambers comprising an inlet chamber and an outlet chamber, means to supply fuel to the inlet chamber, means to deliver fuel from the outlet chamber to a point of use, the fuel reservoir member chambers also including a bypass chamber, means interconnecting the bypass chamber with the outlet chamber; the fuel pump also comprising pump means interconnecting the inlet chamber and the outlet chamber and adapted to suck fuel from the fuel supply means into the inlet chamber, through the pump means, out the outlet chamber, and to the fuel delivery means; the bypass chamber and the pump means providing two substantially separate paths of fuel flow in the fuel reservoir member, bypass plunger means normally closing off the flow of fuel through the bypass chamber one of the substantially separate paths including the fuel supply means and the fuel delivery means when the bypass plunger means is closed, the second of the substantially separate paths including the bypass chamber when the bypass plunger means is open, and all of the chambers and the interconnecting means therebetween being configured so as to create turbulence in the flow of any fuel supplied to the outlet chamber by the pump means and bypassed through the bypass chamber and the interconnecting means.

  1. 1. VIEW OS SOUTH FRONT OF BOILER HOUSE, WITH SCALE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW OS SOUTH FRONT OF BOILER HOUSE, WITH SCALE STICK, SHOWING HEAVY SCALES OFFICE TO LEFT, LOOKING NORTH - Marvine Colliery, Boiler House No. 2, West side Boulevard Avenue, between East Parker Street & Route 380, Scranton, Lackawanna County, PA

  2. 38. Photocopy of photograph. STEEL PLANT, BOILERS UNDER CONSTRUCTION IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    38. Photocopy of photograph. STEEL PLANT, BOILERS UNDER CONSTRUCTION IN BOILER PLANT LOCATED EAST OF MAIN STEEL PLANT, 1909. (From the Bethlehem Steel Corporation collection, Seattle, WA) - Irondale Iron & Steel Plant, Port Townsend, Jefferson County, WA

  3. Looking northwest at central boiler house, with 16" skelp mill ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking northwest at central boiler house, with 16" skelp mill furnace building in foreground. - U.S. Steel National Tube Works, Central Boiler House, Along Monongahela River, McKeesport, Allegheny County, PA

  4. Looking north at the stokers for boilers numbers 1 through ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking north at the stokers for boilers numbers 1 through 4. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  5. Looking south at the ash disposal hoppers for boilers numbers ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking south at the ash disposal hoppers for boilers numbers 1 through 6. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  6. Overview of Boiler House showing the Ibeam framework supporting the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Overview of Boiler House showing the I-beam framework supporting the chimney, view facing southwest - Kahului Cannery, Plant No. 28, Boiler House, Sheet Metal and Electrical Shops, 120 Kane Street, Kahului, Maui County, HI

  7. 2. EAST SIDE; COAL ASH FROM BOILERS WAS BLOWN INTO ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. EAST SIDE; COAL ASH FROM BOILERS WAS BLOWN INTO TANK AT RIGHT, THEN DROPPED INTO RAIL CARS FOR REMOVAL - Rath Packing Company, Boiler Room, Sycamore Street between Elm & Eighteenth Streets, Waterloo, Black Hawk County, IA

  8. 3. GENERAL VIEW OF BOILER ROOM, LOOKING NORTH; CONTROL PANEL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. GENERAL VIEW OF BOILER ROOM, LOOKING NORTH; CONTROL PANEL AT CENTER; BOXLIKE, RIVETED HOUSING AT TOP CENTER CONTAINED AUGER FOR COAL DISTRIBUTION SYSTEM - Rath Packing Company, Boiler Room, Sycamore Street between Elm & Eighteenth Streets, Waterloo, Black Hawk County, IA

  9. 4. STEAM PLANT MARINE BOILERS WEST OF STEAM PLANT AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. STEAM PLANT MARINE BOILERS WEST OF STEAM PLANT AND SOUTH OF ORIGINAL STEAM PLANT BOILERS, FROM SOUTH. November 13, 1990 - Crosscut Steam Plant, North side Salt River near Mill Avenue & Washington Street, Tempe, Maricopa County, AZ

  10. 13. Interior, boiler house, at elev. 55' looking west at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Interior, boiler house, at elev. 55' looking west at retired 300 lb. boilers #11, 10, and 9. - Manchester Street Generating Station, Manchester Street Station, 460 Eddy Street, Providence, Providence County, RI

  11. 3. Partial view of SE sides of Boiler Building (left), ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Partial view of SE sides of Boiler Building (left), Incineration Building (to right of stack) and Machine Shop (right). - Pacific Creosoting Plant, Boiler Building, 5350 Creosote Place, Northeast, Bremerton, Kitsap County, WA

  12. View of the rear of the electrical department & boiler ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the rear of the electrical department & boiler house, behind the upper shops - Johnson Steel Street Rail Company, Electrical Department & Boiler House, 525 Central Avenue, Johnstown, Cambria County, PA

  13. 20. FIREMAN'S END OF FIRETUBE BOILER. MANUFACTURED BY LUCEY. THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. FIREMAN'S END OF FIRE-TUBE BOILER. MANUFACTURED BY LUCEY. THE BOILER CREATED APPROXIMATELY 150 POUNDS OF PRESSURE. - Dredge CINCINNATI, Docked on Ohio River at foot of Lighthill Street, Pittsburgh, Allegheny County, PA

  14. 36. REDUCTION PLANT CLOSE VIEW OF FURNACE AND BOILER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    36. REDUCTION PLANT - CLOSE VIEW OF FURNACE AND BOILER Reduction Plant furnace and boiler used to provide heat for drying the fish and fish offal, in their conversion to meal. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

  15. Looking south at a chemical mixing tank for boiler feedwater. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking south at a chemical mixing tank for boiler feedwater. - Wheeling-Pittsburgh Steel Corporation, Allenport Works, Boiler House, Route 88 on West bank of Monongahela River, Allenport, Washington County, PA

  16. Utilization of silt as CFB boiler fuel

    SciTech Connect

    Herb, B.; Tsao, T.R.; Bickley, D.

    1994-12-31

    Bituminous silt represents an enormous source of discarded energy that is polluting the environment. Although bituminous silt is a potential opportunity fuel for circulating fluidized bed (CFB) boilers, handling problems and uncertainties about the impact of this fuel on CFB boiler performance and operating economics have prevented its use. Under sponsorship of the Pennsylvania Energy Development Authority, five different technologies having the potential to process silt into CFB boiler fuel were evaluated. The technologies evaluated include: washing, pelletizing, thermal drying, mulling and flaking. The desired goal was to process the silt into a form that can be fed to CFB boilers using conventional coal handling equipment and combusted in an environmentally acceptable manner. Criteria were developed for the product characteristics that are desired and tests were run to evaluate the technical feasibility of each silt processing technology. Based on these test results, the design and cost bases for a commercial silt processing facility were developed for each technology capable of achieving the desired product characteristics. As a result of considering both engineering and economic factors, the technology that best meets the objectives for use of processed silt as CFB boiler fuel was selected for further demonstration testing. This paper will present the results of this project up through the selection of the best silt processing technology.

  17. Boiler MACT Technical Assistance (Fact Sheet)

    SciTech Connect

    Not Available

    2012-03-01

    Fact sheet describing the changes to Environmental Protection Act process standards. The DOE will offer technical assistance to ensure that major sources burning coal and oil have information on cost-effective, clean energy strategies for compliance, and to promote cleaner, more efficient boiler burning to cut harmful pollution and reduce operational costs. The U.S. Environmental Protection Agency (EPA) is expected to finalize the reconsideration process for its Clean Air Act pollution standards National Emissions Standards for Hazardous Air Pollutants for Major Sources: Industrial, Commercial, and Institutional Boilers and Process Heaters (known as Boiler Maximum Achievable Control Technology (MACT)), in Spring 2012. This rule applies to large and small boilers in a wide range of industrial facilities and institutions. The U.S. Department of Energy (DOE) will offer technical assistance to ensure that major sources burning coal or oil have information on cost-effective clean energy strategies for compliance, including combined heat and power, and to promote cleaner, more efficient boilers to cut harmful pollution and reduce operational costs.

  18. Boiler house modernization through shared savings program

    SciTech Connect

    Breault, R.W.

    1995-12-31

    Throughout Poland as well as the rest of Eastern Europe, communities and industries rely on small heat only boilers to provide district and process heat. Together these two sectors produce about 85,000 MW from boilers in the 2 to 35 MW size range. The bulk of these units were installed prior to 1992 and must be completely overhauled to meet the emission regulations which will be coming into effect on January 1, 1998. Since the only practical fuel is coal in most cases, these boilers must be either retrofit with emission control technology or be replaced entirely. The question that arises is how to accomplish this given the current tight control of capital in Poland and other East European countries. A solution that we have for this problem is shared savings. These boilers are typically operating with a quiet low efficiency as compared to western standards and with excessive manual labor. Installing modernization equipment to improve the efficiency and to automate the process provides savings. ECOGY provides the funds for the modernization to improve the efficiency, add automation and install emission control equipment. The savings that are generated during the operation of the modernized boiler system are split between the client company and ECOGY for a number of years and then the system is turned over in entirety to the client. Depending on the operating capacity, the shared savings agreement will usually span 6 to 10 years.

  19. Explosion in boiler closes Arkansas utility

    SciTech Connect

    Not Available

    1993-08-23

    A major boiler explosion Aug. 11 that seriously injured one worker at the Independence Unit 2 coal-fired powerplant in Newark, Ark., caused extensive damage that will keep the plant closed for several months. The plant is owned by Arkansas Power Light Co., Little Rock. Officials are still trying to determine cause and are assessing damage, though they expect the boiler can be repaired. Etienne Senac, plant manager, says the explosion [open quotes]puffed out[close quotes] but did not rupture the 271-ft-tall boiler and also buckled several buck stays, which hold the boiler to a steel superstructure. The accident took place at 8:30 a.m. as the 842-Mw unit was operating close to full capacity. Senac says the concussion knocked down workers standing 50 ft from the boiler. The explosion pushed ash and molten material out of the bottom of the unit, causing a small fire. One contract worker was seriously burned and hospitalized. Four AP L workers received minor burns.

  20. Feeding Your Baby in the NICU

    MedlinePlus

    ... and your baby. How can you feed breast milk to your baby? Breast milk provides many wonderful and vital health benefits for ... The mother can learn how to pump her milk so it can be delivered by tube to ...

  1. Solar powered circulation pump development. Final report

    SciTech Connect

    Johnson, A.L.

    1980-09-01

    An iterative design and evaluation process was undertaken to develop a prototype solar powered liquid circulation pump. The first effort was to review the state-of-the-art of liquid piston heat engines. Next a morphological analysis of the original concept was performed. An analysis of the pump performance from a theoretical basis was performed by deriving and solving the equations governing the cycle. The results are documented. An experimental evaluation of the condensing phenomena was performed. The design of the boiler was then undertaken. This effort showed a fundamental physical limitation imposed by the original geometry and the physics of water boiling. In an effort to resolve this problem, a number of alternate configurations were examined, with the result being that the boiler and heat pipe elements of the design were entirely eliminated. In their stead it was assumed that the boiling could be conducted in the solar panel. A number of solar panel designs were examined, and the most appropriate type of solar panel is described in the appendix. A 1/4th scale unit was fabricated and tested. The overall efficiency was approximately 1% at the design point, compared with a theoretical limit of 1.6% for the given operating conditions. The production costs of the full size pump were examined. Finally systems integration aspects were considered and the results presented.

  2. 40 CFR 63.988 - Incinerators, boilers, and process heaters.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... status requirements of 40 CFR part 265, subpart O; (ii) A boiler or process heater with a design heat... 40 Protection of Environment 10 2010-07-01 2010-07-01 false Incinerators, boilers, and process... Routing to a Fuel Gas System or a Process § 63.988 Incinerators, boilers, and process heaters. (a...

  3. Biomass boiler conversion potential in the eastern United States

    Treesearch

    Charles D. Ray; Li Ma; Thomas Wilson; Daniel Wilson; Lew McCreery; Janice K. Wiedenbeck

    2013-01-01

    The U.S. is the world's leading consumer of primary energy. A large fraction of this energy is used in boiler installations to generate steam and hot water for heating applications. It is estimated there are total 163,000 industrial and commercial boilers in use in the United States of all sizes. This paper characterizes the commercial and industrial boilers in...

  4. 46 CFR 63.25-1 - Small automatic auxiliary boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Small automatic auxiliary boilers. 63.25-1 Section 63.25-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING AUTOMATIC AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-1 Small automatic...

  5. 46 CFR 63.25-1 - Small automatic auxiliary boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Small automatic auxiliary boilers. 63.25-1 Section 63.25-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING AUTOMATIC AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-1 Small automatic...

  6. 46 CFR 63.25-1 - Small automatic auxiliary boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Small automatic auxiliary boilers. 63.25-1 Section 63.25-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING AUTOMATIC AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-1 Small automatic...

  7. 46 CFR 63.25-1 - Small automatic auxiliary boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Small automatic auxiliary boilers. 63.25-1 Section 63.25-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING AUTOMATIC AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-1 Small automatic...

  8. 46 CFR 63.25-1 - Small automatic auxiliary boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Small automatic auxiliary boilers. 63.25-1 Section 63.25-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING AUTOMATIC AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-1 Small automatic...

  9. Fluidized-bed boilers achieve commercial status worldwide

    SciTech Connect

    Schwieger, B.

    1985-02-01

    The author reviews the current status of commercial fluidized-bed boilers worldwide. Particular attention is given to circulating fluidised-bed systems. A number of detailed tables are presented providing details of manufacturers of afb boilers, and information on 88 installed boilers, their fuels, combustion systems and operational data. Less detailed information is given of a further 140 installations.

  10. 46 CFR 109.205 - Inspection of boilers and machinery.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Inspection of boilers and machinery. 109.205 Section 109... OPERATIONS Tests, Drills, and Inspections § 109.205 Inspection of boilers and machinery. The chief engineer or engineer in charge, before he assumes charge of the boilers and machinery of a unit shall inspect...

  11. 46 CFR 109.205 - Inspection of boilers and machinery.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Inspection of boilers and machinery. 109.205 Section 109... OPERATIONS Tests, Drills, and Inspections § 109.205 Inspection of boilers and machinery. The chief engineer or engineer in charge, before he assumes charge of the boilers and machinery of a unit shall inspect...

  12. 46 CFR 109.205 - Inspection of boilers and machinery.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Inspection of boilers and machinery. 109.205 Section 109... OPERATIONS Tests, Drills, and Inspections § 109.205 Inspection of boilers and machinery. The chief engineer or engineer in charge, before he assumes charge of the boilers and machinery of a unit shall inspect...

  13. 46 CFR 109.205 - Inspection of boilers and machinery.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Inspection of boilers and machinery. 109.205 Section 109... OPERATIONS Tests, Drills, and Inspections § 109.205 Inspection of boilers and machinery. The chief engineer or engineer in charge, before he assumes charge of the boilers and machinery of a unit shall inspect...

  14. 23. VIEW FROM CATWALK OF EAST BOILER ROOM LOOKING NORTH. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. VIEW FROM CATWALK OF EAST BOILER ROOM LOOKING NORTH. BOILERS 900 AND 901 ARE ON THE LEFT, BOILERS 902 AND 903 ARE ON THE RIGHT. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  15. 26. VIEW OF SOUTHERN PORTION OF EAST BOILER ROOM LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. VIEW OF SOUTHERN PORTION OF EAST BOILER ROOM LOOKING EAST AT BOILER 904. BOILER 904 WAS MANUFACTURED BY RILEY STOKER AND INSTALLED IN 1944. ORIGINALLY FUELED BY PULVERIZED COAL, IT WAS CONVERTED TO GAS/OIL OPERATION IN 1978 AND OPERATED UNTIL THE PLANT CLOSED. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  16. 30 CFR 77.411 - Compressed air and boilers; general.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Compressed air and boilers; general. 77.411... COAL MINES Safeguards for Mechanical Equipment § 77.411 Compressed air and boilers; general. All boilers and pressure vessels shall be constructed, installed, and maintained in accordance with...

  17. 40 CFR 761.71 - High efficiency boilers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 32 2013-07-01 2013-07-01 false High efficiency boilers. 761.71... PROHIBITIONS Storage and Disposal § 761.71 High efficiency boilers. (a) To burn mineral oil dielectric fluid containing a PCB concentration of ≥50 ppm, but boiler shall comply with the...

  18. 40 CFR 63.988 - Incinerators, boilers, and process heaters.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 11 2014-07-01 2014-07-01 false Incinerators, boilers, and process... Routing to a Fuel Gas System or a Process § 63.988 Incinerators, boilers, and process heaters. (a) Equipment and operating requirements. (1) Owners or operators using incinerators, boilers, or...

  19. 46 CFR 115.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Pressure vessels and boilers. 115.812 Section 115.812... CERTIFICATION Material Inspections § 115.812 Pressure vessels and boilers. (a) Pressure vessels must be tested... testing requirements for boilers are contained in § 61.05 in subchapter F of this chapter....

  20. 40 CFR 761.71 - High efficiency boilers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 30 2010-07-01 2010-07-01 false High efficiency boilers. 761.71... PROHIBITIONS Storage and Disposal § 761.71 High efficiency boilers. (a) To burn mineral oil dielectric fluid containing a PCB concentration of ≥50 ppm, but boiler shall comply with the...

  1. 16 CFR Appendix G7 to Part 305 - Boilers (Oil)

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 1 2014-01-01 2014-01-01 false Boilers (Oil) G7 Appendix G7 to Part 305... RULEâ) Appendix G7 to Part 305—Boilers (Oil) Type Range of annual fuel utilization efficiencies (AFUEs) Low High Oil Boilers Manufactured Before the Compliance Date of DOE Regional Standards for...

  2. 10 CFR 431.82 - Definitions concerning commercial packaged boilers.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 10 Energy 3 2013-01-01 2013-01-01 false Definitions concerning commercial packaged boilers. 431.82... COMMERCIAL AND INDUSTRIAL EQUIPMENT Commercial Packaged Boilers § 431.82 Definitions concerning commercial packaged boilers. The following definitions apply for purposes of this subpart E, and of subparts A and...

  3. 30 CFR 77.411 - Compressed air and boilers; general.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Compressed air and boilers; general. 77.411... COAL MINES Safeguards for Mechanical Equipment § 77.411 Compressed air and boilers; general. All boilers and pressure vessels shall be constructed, installed, and maintained in accordance with...

  4. 30 CFR 77.411 - Compressed air and boilers; general.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Compressed air and boilers; general. 77.411... COAL MINES Safeguards for Mechanical Equipment § 77.411 Compressed air and boilers; general. All boilers and pressure vessels shall be constructed, installed, and maintained in accordance with...

  5. 16 CFR Appendix G8 to Part 305 - Boilers (Electric)

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 1 2014-01-01 2014-01-01 false Boilers (Electric) G8 Appendix G8 to Part... LABELING RULEâ) Appendix G8 to Part 305—Boilers (Electric) Type Range of annual fuel utilization efficiencies (AFUEs) Low High Electric Boilers 100 100...

  6. 30 CFR 77.411 - Compressed air and boilers; general.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Compressed air and boilers; general. 77.411... COAL MINES Safeguards for Mechanical Equipment § 77.411 Compressed air and boilers; general. All boilers and pressure vessels shall be constructed, installed, and maintained in accordance with...

  7. 40 CFR 63.988 - Incinerators, boilers, and process heaters.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 10 2011-07-01 2011-07-01 false Incinerators, boilers, and process... Routing to a Fuel Gas System or a Process § 63.988 Incinerators, boilers, and process heaters. (a) Equipment and operating requirements. (1) Owners or operators using incinerators, boilers, or...

  8. 40 CFR 63.988 - Incinerators, boilers, and process heaters.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 11 2012-07-01 2012-07-01 false Incinerators, boilers, and process... Routing to a Fuel Gas System or a Process § 63.988 Incinerators, boilers, and process heaters. (a) Equipment and operating requirements. (1) Owners or operators using incinerators, boilers, or...

  9. 40 CFR 761.71 - High efficiency boilers.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 31 2014-07-01 2014-07-01 false High efficiency boilers. 761.71... PROHIBITIONS Storage and Disposal § 761.71 High efficiency boilers. (a) To burn mineral oil dielectric fluid containing a PCB concentration of ≥50 ppm, but boiler shall comply with the...

  10. 40 CFR 63.988 - Incinerators, boilers, and process heaters.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 11 2013-07-01 2013-07-01 false Incinerators, boilers, and process... Routing to a Fuel Gas System or a Process § 63.988 Incinerators, boilers, and process heaters. (a) Equipment and operating requirements. (1) Owners or operators using incinerators, boilers, or...

  11. 16 CFR Appendix G6 to Part 305 - Boilers (Gas)

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 1 2014-01-01 2014-01-01 false Boilers (Gas) G6 Appendix G6 to Part 305... RULEâ) Appendix G6 to Part 305—Boilers (Gas) Type Range of annual fuel utilization efficiencies (AFUEs) Low High Gas (Except Steam) Boilers Manufactured Before the Compliance Date of DOE Regional...

  12. 30 CFR 77.411 - Compressed air and boilers; general.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Compressed air and boilers; general. 77.411... COAL MINES Safeguards for Mechanical Equipment § 77.411 Compressed air and boilers; general. All boilers and pressure vessels shall be constructed, installed, and maintained in accordance with...

  13. Some common corrosion mechanisms leading to boiler tube failure

    SciTech Connect

    Bain, D.I.; Haff, J.D.; Kelly, J.A.

    1996-10-01

    Corrosion mechanisms remain a major cause of tube failures in operating boiler units. Conditions resulting in caustic corrosion, acid corrosion, chelant corrosion and sulfate induced high temperature external corrosion of boiler tribes are reviewed. Three case histories are presented illustrating the impact of the conditions discussed on boiler tube failures.

  14. Overview of Boiler House and Sheet Metal and Electrical Shops ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Overview of Boiler House and Sheet Metal and Electrical Shops Building (center - with single large chimney), note the monitor on the original section of the Boiler House Building, view facing north - Kahului Cannery, Plant No. 28, Boiler House, Sheet Metal and Electrical Shops, 120 Kane Street, Kahului, Maui County, HI

  15. 21 CFR 173.310 - Boiler water additives.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Boiler water additives. 173.310 Section 173.310... CONSUMPTION Specific Usage Additives § 173.310 Boiler water additives. Boiler water additives may be safely... water. Copolymer contains not more than 0.5 percent by weight of acrylic acid monomer (dry weight...

  16. 21 CFR 173.310 - Boiler water additives.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Boiler water additives. 173.310 Section 173.310... CONSUMPTION Specific Usage Additives § 173.310 Boiler water additives. Boiler water additives may be safely... water. Copolymer contains not more than 0.5 percent by weight of acrylic acid monomer (dry weight...

  17. SO{sub x} and NO{sub x} control in Pyroflow circulating fluidized-bed boilers

    SciTech Connect

    Ganesh, A.; Johnk, C.

    1995-12-31

    Ahlstrom Pyropower offers the most comprehensive experience with Circulating Fluidized-Bed Boiler technology available in the world. There are more than 135 Pyroflow units in operation or under construction worldwide with over 400 unit years of operating experience. All Ahlstrom Pyropower units have met their guarantees including, in some cases, the strictest emission limits. Pyroflow commercial CFB boilers have proven the ability and flexibility to burn a wide variety of low grade fuels economically and still meet stringent environmental requirements. The emission control in CFB boilers is specific to the type of fuel used, since each fuel analysis can vary widely. Sulfur dioxide emissions (SO{sub 2}) from CFB boilers are effectively controlled by means of feeding limestone at predetermined locations in the furnace. NO{sub x} emissions are controlled by staged combustion. NO{sub x} emissions can be controlled furthermore by direct injection of ammonia or urea at furnace outlet. SO{sub 2} and NO{sub x} emissions in Ahlstrom Pyropower CFB boilers have been improved over the years by improved process and design parameters. Data from recently commissioned units are provided. A comparison of SO{sub 2} and NO{sub x} emissions with permitted levels is made.

  18. Direct contact, binary fluid geothermal boiler

    DOEpatents

    Rapier, P.M.

    1979-12-27

    Energy is extracted from geothermal brines by direct contact with a working fluid such as isobutane which is immiscible with the brine in a geothermal boiler. The geothermal boiler provides a distributor arrangement which efficiently contacts geothermal brine with the isobutane in order to prevent the entrainment of geothermal brine in the isobutane vapor which is directed to a turbine. Accordingly the problem of brine carryover through the turbine causing corrosion and scaling thereof is eliminated. Additionally the heat exchanger includes straightening vanes for preventing startup and other temporary fluctuations in the transitional zone of the boiler from causing brine carryover into the turbine. Also a screen is provided in the heat exchanger to coalesce the working fluid and to assist in defining the location of the transitional zone where the geothermal brine and the isobutane are initially mixed.

  19. Direct contact, binary fluid geothermal boiler

    DOEpatents

    Rapier, Pascal M.

    1982-01-01

    Energy is extracted from geothermal brines by direct contact with a working fluid such as isobutane which is immiscible with the brine in a geothermal boiler. The geothermal boiler provides a distributor arrangement which efficiently contacts geothermal brine with the isobutane in order to prevent the entrainment of geothermal brine in the isobutane vapor which is directed to a turbine. Accordingly the problem of brine carry-over through the turbine causes corrosion and scaling thereof is eliminated. Additionally the heat exchanger includes straightening vanes for preventing startup and other temporary fluctuations in the transitional zone of the boiler from causing brine carryover into the turbine. Also a screen is provided in the heat exchanger to coalesce the working fluid and to assist in defining the location of the transitional zone where the geothermal brine and the isobutane are initially mixed.

  20. Evaluation of thermal overload in boiler operators.

    PubMed

    Braga, Camila Soares; Rodrigues, Valéria Antônia Justino; Campos, Julio César Costa; de Souza, Amaury Paulo; Minette, Luciano José; de Moraes, Angêlo Casali; Sensato, Guilherme Luciano

    2012-01-01

    The Brazilians educational institutions need a large energy demand for the operation of laundries, restaurants and accommodation of students. Much of that energy comes from steam generated in boilers with wood fuel. The laboral activity in boiler may present problems for the operator's health due to exposure to excessive heat, and its operation has a high degree of risk. This paper describes an analysis made the conditions of thermal environment in the operation of a B category boiler, located at a Higher Education Institution, located in the Zona da Mata Mineira The equipments used to collect data were Meter WBGT of the Heat Index; Meter of Wet Bulb Index and Globe Thermometer (WBGT); Politeste Instruments, an anemometer and an Infrared Thermometer. By the application of questionnaires, the second phase consisted of collecting data on environmental factors (temperature natural environment, globe temperature, relative humidity and air velocity). The study concluded that during the period evaluated, the activity had thermal overload.

  1. Boiler fuel economizers surpass savings projection

    SciTech Connect

    Not Available

    1984-03-01

    This paper describes three Kentube RETROMISER fuel economiser units chosen for their efficiency and compact size. Plant gas consumption was reduced by 50,000 cu. ft. the day the first unit went on-line. The energy management program is being conducted by Whitman's Chocolates in Pennsylvania with the goal of reducing the Btu's of energy used per pound of product produced. Engineers conducted a performance study of the plant and concluded that boiler fuel economizers could produce substantial savings by preheating the boiler's feedwater. The fuel economizer finned tubing offered greater heat transfer surface than bare tube of the same diameter and its continuously welded, helically wound fin gave outstanding thermal performance and continuous fin-to-tube contact for maximum heat transfer. Equally important was the unit's compact, cylindrical design, which allowed simple installation in the boiler room.

  2. Design of a 350 MWe CFB boiler

    SciTech Connect

    Darling, S.L.; Li, X.

    1997-12-31

    Circulating fluidized bed (CFB) boilers have been in operation for many years in industrial steam and power generation applications, primarily in the 50--100 MWe size range. Recently, several utility-scale CFB boilers have entered service and several others are under construction, in the 150--250 MWe size range. The next step for CFB technology is the 350 MWe size range. This paper will describe Foster Wheeler`s utility CFB experience, scale-up philosophy and the major design features of the 350 MWe CFB design.

  3. Compact CFB: The next generation CFB boiler

    SciTech Connect

    Utt, J.

    1996-12-31

    The next generation of compact circulating fluidized bed (CFB) boilers is described in outline form. The following topics are discussed: compact CFB = pyroflow + compact separator; compact CFB; compact separator is a breakthrough design; advantages of CFB; new design with substantial development history; KUHMO: successful demo unit; KUHMO: good performance over load range with low emissions; KOKKOLA: first commercial unit and emissions; KOKKOLA: first commercial unit and emissions; compact CFB installations; next generation CFB boiler; grid nozzle upgrades; cast segmented vortex finders; vortex finder installation; ceramic anchors; pre-cast vertical bullnose; refractory upgrades; and wet gunning.

  4. Transients in a circulating fluidized bed boiler

    NASA Astrophysics Data System (ADS)

    Baskakov, A. P.; Munts, V. A.; Pavlyuk, E. Yu.

    2013-11-01

    Transients in a circulating fluidized bed boiler firing biomass are considered. An attempt is made to describe transients with the use of concepts applied in the automatic control theory. The parameters calculated from an analysis of unsteady heat balance equations are compared with the experimental data obtained in the 12-MW boiler of the Chalmers University of Technology. It is demonstrated that these equations describe the transient modes of operation with good accuracy. Dependences for calculating the time constants of unsteady processes are obtained.

  5. Heat pipe waste heat recovery boilers

    NASA Astrophysics Data System (ADS)

    Littwin, D. A.; McCurley, J.

    The use of heat pipes as transport devices in waste heat recovery boilers is examined. Test results show that heat pipes can efficiently extract heat from the hot gas stream and transfer it inside the pressure vessel for the steam generation process. The benefits of incorporating heat pipes into the design of waste heat recovery boilers include a highly compact package, a significant reduction in thermally induced stresses, double isolation of the steam from the heat source, an extended surface for improved efficiency in heat extraction, improved circulation and stability in the boiling regime, easy cleaning, individually replaceable tubes, and low flue gas pressure drop.

  6. Benchmarking boiler tube failures - Part 1

    SciTech Connect

    Patrick, J.; Oldani, R.; von Behren, D.

    2005-10-01

    Boiler tube failures continue to be the leading cause of downtime for steam power plants. That should not be a surprise; a typical steam generator has miles of tubes that operate at high temperatures and pressures. Are your experiences comparable to those of your peers? Could you learn something from tube-leak benchmarking data that could improve the operation of your plant? The Electric Utility Cost Group (EUCG) recently completed a boiler-tube failure study that is available only to its members. But Power magazine has been given exclusive access to some of the results, published in this article. 4 figs.

  7. Optimal load allocation of multiple fuel boilers.

    PubMed

    Dunn, Alex C; Du, Yan Yi

    2009-04-01

    This paper presents a new methodology for optimally allocating a set of multiple industrial boilers that each simultaneously consumes multiple fuel types. Unlike recent similar approaches in the utility industry that use soft computing techniques, this approach is based on a second-order gradient search method that is easy to implement without any specialized optimization software. The algorithm converges rapidly and the application yields significant savings benefits, up to 3% of the overall operating cost of industrial boiler systems in the examples given and potentially higher in other cases, depending on the plant circumstances. Given today's energy prices, this can yield significant savings benefits to manufacturers that raise steam for plant operations.

  8. Validation of Coal Combustion Model by Using Experimental Data of Utility Boilers

    NASA Astrophysics Data System (ADS)

    Yamamoto, Kenji; Taniguchi, Masayuki; Kobayashi, Hironobu; Sakata, Taro; Kudo, Kazuhiko

    Applicability of a coal combustion model was validated by comparing its predictions with experimental data of utility boilers. The coal combustion model had gasification and NOx reaction submodels and it was developed by using a small drop-tube-furnace (coal feed rate 0.6kg/h). A turbulence combustion simulation program was developed by introducing the coal combustion model. The program was validated by comparing its predictions with 23 sets of experimental results which contained different plant, load and coal data. The temperature difference between simulated and experimental results was within 30°C at the furnace exit. The decreasing characteristic of coal burnout with increasing load was well predicted. The NOx emission difference between simulated and experimental results was less than 15%. The coal combustion model was judged applicable to utility boilers.

  9. OMFP: An Approach for Online Mass Flow Prediction in CFB Boilers

    NASA Astrophysics Data System (ADS)

    Žliobaitė, Indrė; Bakker, Jorn; Pechenizkiy, Mykola

    Fuel feeding and inhomogeneity of fuel typically cause process fluctuations in the circulating fluidized bed (CFB) boilers. If control systems fail to compensate the fluctuations, the whole plant will suffer from fluctuations that are reinforced by the closed-loop controls. Accurate estimates of fuel consumption among other factors are needed for control systems operation. In this paper we address a problem of online mass flow prediction. Particularly, we consider the problems of (1) constructing the ground truth, (2) handling noise and abrupt concept drift, and (3) learning an accurate predictor. Last but not least we emphasize the importance of having the domain knowledge concerning the considered case. We demonstrate the performance of OMPF using real data sets collected from the experimental CFB boiler.

  10. Fluidized-bed boilers keep Chinese industry running on marginal fuels

    SciTech Connect

    Schwieger, B.

    1983-03-01

    Two thousand atmospheric fluidized bed (AFB) boilers are in use in the People's Republic of China. The major Chinese objective is the use of local fuels--oil shale, char from coal-gasification processes and lignite--all of which is of poor quality and can be burned most economically in AFB's. AFB use in the US would emphasize SO/sub 2/ removal in the combustion chamber to comply with air-pollution standards. While Chinese AFB's are simple, locally produced, US AFB's concentrate on sophisticated control systems to minimize reagent consumption in SO/sub 2/ capture. Various standard units and homemade AFB boilers in China are surveyed. Pictures of coal dumping, feeding, ash quenching, and control room are given. The Chinese procedure for startup is described in detail.

  11. Maternal and breast pump factors associated with breast pump problems and injuries.

    PubMed

    Qi, Youlin; Zhang, Yuanting; Fein, Sara; Wang, Cunlin; Loyo-Berríos, Nilsa

    2014-02-01

    Benefits of using a breast pump are well documented, but pump-related problems and injuries and the associated risk factors have not been reported. This study aimed to describe breast pump-related problems and injuries and identify factors associated with these problems and injuries. Data were from the Infant Feeding Practices Study II; mothers were recruited from a nationally distributed consumer opinion panel. Mothers were asked about breast pump use, problems, and injuries at infant ages 2, 5, and 7 months. Survival analysis was used to identify factors associated with pump-related problems and injuries. The sample included 1844 mothers. About 62% and 15% of mothers reported pump-related problems and injuries, respectively. The most commonly reported problem was that the pump did not extract enough milk and the most commonly reported injury was sore nipples. Using a battery-operated pump and intending to breastfeed less than 12 months were associated with higher risks of pump-related problems and injury. Learning from a friend to use the pump was associated with lower risk of pump-related problems, and using a manual pump and renting a pump were associated with a higher risk of problems. Our results suggest that problems and injuries associated with breast pump use can happen to mothers of all socioeconomic characteristics. Breastfeeding mothers may reduce their risks of problems and injury by not using battery-operated pumps and may reduce breast pump problems by not using manual pumps and by learning breast pump skills from a person rather than following written or video instructions.

  12. DIFFUSION PUMP

    DOEpatents

    Levenson, L.

    1963-09-01

    A high-vacuum diffusion pump is described, featuring a novel housing geometry for enhancing pumping speed. An upright, cylindrical lower housing portion is surmounted by a concentric, upright, cylindrical upper housing portion of substantially larger diameter; an uppermost nozzle, disposed concentrically within the upper portion, is adapted to eject downwardly a conical sheet of liquid outwardly to impinge upon the uppermost extremity of the interior wall of the lower portion. Preferably this nozzle is mounted upon a pedestal rising coaxially from within the lower portion and projecting up into said upper portion. (AEC)

  13. Electrokinetic pump

    DOEpatents

    Hencken, Kenneth R.; Sartor, George B.

    2004-08-03

    An electrokinetic pump in which the porous dielectric medium of conventional electrokinetic pumps is replaced by a patterned microstructure. The patterned microstructure is fabricated by lithographic patterning and etching of a substrate and is formed by features arranged so as to create an array of microchannels. The microchannels have dimensions on the order of the pore spacing in a conventional porous dielectric medium. Embedded unitary electrodes are vapor deposited on either end of the channel structure to provide the electric field necessary for electroosmotic flow.

  14. Design and experience with utility-scale CFB boilers

    SciTech Connect

    Darling, S.L.; Hennenfent, M.

    1995-12-31

    Circulating fluidized bed (CFB) boilers have been in operation for many years in industrial steam and power generation applications, primarily in the 50-100 MWe range. In the past few years, however, several utility-scale CFB boilers have entered service. The scale-up of the Foster Wheeler Pyropower, Inc. CFB boilers has proceeded smoothly, and today FWPI CFB boilers up to 180 MWe are in operation, two 235 MWe boilers are now under construction, and other large units are in the design stage.

  15. Loss of feed flow, steam generator tube rupture and steam line break thermohydraulic experiments

    SciTech Connect

    Mendler, O J; Takeuchi, K; Young, M Y

    1986-10-01

    The Westinghouse Model Boiler No. 2 (MB-2) steam generator test model at the Engineering Test Facility in Tampa, Florida, was reinstrumented and modified for performing a series of tests simulating steam generator accident transients. The transients simulated were: loss of feed flow, steam generator tube rupture, and steam line break events. This document presents a description of (1) the model boiler and the associated test facility, (2) the tests performed, and (3) the analyses of the test results.

  16. Novel CFB Boiler Technology with Reconstruction of its Fluidization State

    NASA Astrophysics Data System (ADS)

    Yang, H. R.; Zhang, H.; Lu, J. F.; Lfu, Q.; Wu, Y. X.; Yuet, G. X.; Su, J.; Fu, Z. P.

    Compared with a conventional pulverized coal fired boiler, the combustion efficiency of a CFB boiler is lower while the self-consumed service power is 1-2% higher. The solution of these problems is the key research topic for researchers and manufacturers of CFB boilers. Based on the State Specification Design Theory of CFB boilers, Tsinghua University proposed a novel CFB technology by reconstruction of the fluidization state in the furnace by adjusting the bed inventory and bed quality. Theoretical analyses show that there is an optimal bed pressure drop, around which the boiler operation can achieve the maximal combustion efficiency and with significant reduction of the wear of the heating surface and fan power consumption. The proposed novel process was implemented in a 75t/h CFB boiler. The results of field tests on this boiler validated the theoretical analyses.

  17. Design and experience with large-size CFB boilers

    SciTech Connect

    Darling, S.L.

    1994-12-31

    CFB boilers have been in operation for many years in industrial steam and power generation applications demonstrating the low SO{sub x}/NO{sub x} emissions and fuel flexibility of the technology. In the past few years, several large-size CFB boilers (over 100 MWe) have entered service and are operating successfully. On the basis of this experience, CFB boilers up to 400 MWe in size are now being offered with full commercial guarantees. Such large CFB boilers will be of interest to countries with strict emission regulations or the need to reduce emissions, and to countries with both a large need for additional power and low grade indigenous solid fuel. This paper will describe Ahlstrom Pyropower`s scale-up of the AHLSTROM PYROFLOW CFB boiler, experience with large-size CFB boilers and the design features of CFB boilers in the 400 MWe size range.

  18. Design considerations of B&W internal circulation CFB boilers

    SciTech Connect

    Kavidass, S.; Belin, F.; James, D.E.

    1995-12-31

    Worldwide, the use of Circulating Fluidized-Bed (CFB) boiler technology is rapidly increasing due to the ability to burn low grade fuels while meeting the required NO{sub x}, SO{sub 2}, CO, VOC, and particulate emissions requirements. The CFB boiler can produce steam economically for process and electric power generation. This paper discusses various aspects of Babcock & Wilcox (B&W) internal recirculation circulating fluidized-bed (IR-CFB) boiler design including fuel, boiler process parameters, and emissions. The B&W CFB boiler is unique in design. It utilizes proven impact-type particle separators (U-beams) with in-furnace solids recirculation recirculation. The paper describes the methodology for setting up process parameters, heat duty, boiler design, including auxiliary equipment selection and advantages. The paper also updates the ongoing IR-CFB boiler contracts.

  19. The next generation of oxy-fuel boiler systems

    SciTech Connect

    Ochs, Thomas L.; Gross, Alex; Patrick, Brian; Oryshchyn, Danylo B.; Summers, Cathy A.; Turner, Paul C.

    2005-01-01

    Research in the area of oxy-fuel combustion which is being pioneered by Jupiter Oxygen Corporation combined with boiler research conducted by the USDOE/Albany Research Center has been applied to designing the next generation of oxy-fuel combustion systems. The new systems will enhance control of boiler systems during turn-down and improve response time while improving boiler efficiency. These next generation boiler systems produce a combustion product that has been shown to be well suited for integrated pollutant removal. These systems have the promise of reducing boiler foot-print and boiler construction costs. The modularity of the system opens the possibility of using this design for replacement of boilers for retrofit on existing systems.

  20. Stress Assisted Corrosion in Boiler Tubes - Failure Analysis

    SciTech Connect

    Singh, Preet M; Pawel, Steven J; Yang, Dong; Mahmood, Jamshad

    2007-01-01

    Stress assisted corrosion (SAC) of carbon steel boiler tubes is one of the major causes of waterside failure in industrial boilers. SAC is a major concern for kraft recovery boilers in the pulp and paper industry as any water leak into the furnace can cause a smelt-water explosion in the boiler. Failed carbon steel boiler tubes from different kraft recovery boilers were examined to understand the role of carbon steel microstructure on crack initiation and SAC crack morphology. A number of carbon steel tubes showed a deep decarburized layer on the inner surface (water-touched) and also an unusually large grain size at the inner tube surface. SAC cracks were found to initiate in these areas with large-graineddecarburized microstructure. Tubes without such microstructure were also found to have SAC cracks. It was found that the decarburization and large grained microstructure may facilitate initiation and growth but is not necessary for SAC of carbon steel boiler tubes.

  1. Distributor-type fuel injection pump

    SciTech Connect

    Kobayashi, T.; Nozaki, S.

    1987-10-06

    A distributor-type fuel injection pump is described comprising: (a) a pump body including a rear portion and a head portion. The rear portion has a first bore and the head portion has a second bore extending in alignment with the first bore; (b) a drive shaft rotatably mounted in the first bore via at least two bearings; (c) a feed pump disposed in the pump body adjacent to the rear portion and connected in driven relation to the drive shaft, there being defined between the feed pump and the head portion a cam chamber; (d) a plunger slidably mounted in the second bore and defining between the second bore a pump working chamber; (e) a cam disposed in the cam chamber and connecting the drive shaft with the plunger so as to cause the latter to take rotational and reciprocating motions simultaneously, in unision with the rotation of the drive shaft; (f) a magnetic valve disposed on the head portion for opening and closing a fuel passage communicating with the pump working chamber; (g) a pair of oil seals mounted around the drive shaft and disposed on opposite sides of the feed pump; (h) the rear portion further having a first passageway communicating with the first bore between the two bearings for introducing a lubrication oil into a space defined between the first bore, the drive shaft and the bearings; (i) the drive shaft having at least one second oil passageway extending diametrically therethrough and opening at opposite ends to one of the bearings, and a third oil passageway extending axially therein and communicating the second oil passageway with the cam chamber; and (j) a bypass passage bypassing the cam chamber and communicating a discharge side of the feed pump with an inlet side of the fuel passage of the magnetic valve.

  2. Digital radiographic systems detect boiler tube cracks

    SciTech Connect

    Walker, S.

    2008-06-15

    Boiler water wall leaks have been a major cause of steam plant forced outages. But conventional nondestructive evaluation techniques have a poor track record of detecting corrosion fatigue cracking on the inside surface of the cold side of waterwall tubing. EPRI is performing field trials of a prototype direct-digital radiographic system that promises to be a game changer. 8 figs.

  3. Micronized coal solves mushroom grower's boiler headaches

    SciTech Connect

    Reason, J.

    1984-03-01

    A brief account is given of a Utah mushroom grower who has replaced two underfeed stoker-fired boilers requiring 7 attendants by an ultra-fine pulverised coal-fired system. The coal is ground in a proprietary rotary grinder to 80% through a 325-mesh screen. Information is presented on the mill and the special refractory burners required.

  4. Is That Boiler Ready To Blow?

    ERIC Educational Resources Information Center

    Robinson, Glenn S.; Trombley, Robert E.

    2001-01-01

    Discusses implementation of a thorough assessment program to determine the condition of boilers, pressure vessels and other plant equipment to determine the feasibility of part or entire system replacement. Assessment basics are examined as are tips for selecting the right inspection and engineering contractor for assessments. (GR)

  5. Microphone Detects Boiler-Tube Leaks

    NASA Technical Reports Server (NTRS)

    Parthasarathy, S. P.

    1985-01-01

    Unit simple, sensitive, rugged, and reliable. Diaphragmless microphone detects leaks from small boiler tubes. Porous plug retains carbon granules in tube while allowing pressure changes to penetrate to granules. Has greater life expectancy than previous controllers and used in variety of hot corrosive atmospheres.

  6. Is That Boiler Ready To Blow?

    ERIC Educational Resources Information Center

    Robinson, Glenn S.; Trombley, Robert E.

    2001-01-01

    Discusses implementation of a thorough assessment program to determine the condition of boilers, pressure vessels and other plant equipment to determine the feasibility of part or entire system replacement. Assessment basics are examined as are tips for selecting the right inspection and engineering contractor for assessments. (GR)

  7. Guidelines on fossil boiler field welding

    SciTech Connect

    Stephenson, G.G. )

    1993-01-01

    Welding is a key maintenance activity in the repair and replacement of critical boiler pressure-part components. Unless trained welders use qualified procedures and documented practices, significant delays to outages may result from defective weld repairs, and future weld-related failures may cause costly outages. To address these issues, a comprehensive guideline on field-welding practices for fossil-fired boilers has been developed. It can assist utilities in establishing in-house welding programs. Welding practices used by utilities, boiler manufacturers, and repair organizations were critically reviewed and utilized in the preparation of a step-by-step guideline for repairs to, and replacement, of boiler tubes, headers, and drums. A set of Road Maps, and their accompanying written descriptions, guide the user through each step in every phase of the complete weld repair process. Additionally, the guideline discusses in detail: weld repair management, welder performance qualification and training, repair decision evaluation, defect removal and joint preparation, repair methods for thin and thick sections, welding procedure variables, materials and specifications, failure and root-cause analysis, inspection, and testing.

  8. The reapplication of energetic materials as boiler fuels

    SciTech Connect

    Buckley, S.G.; Sclippa, G.C.; Ross, J.R.

    1997-02-01

    Decommissioning of weapons stockpiles, off-specification production, and upgrading of weapons systems results in a large amount of energetic materials (EM) such as rocket propellant and primary explosives that need to be recycled or disposed of each year. Presently, large quantities of EM are disposed of in a process known as open-burn/open-detonation (OB/OD), which not only wastes their energy content, but may release large quantities of hazardous material into the environment. Here the authors investigate the combustion properties of several types of EM to determine the feasibility of reapplication of these materials as boiler fuels, a process that could salvage the energy content of the EM as well as mitigate any potential adverse environmental impact. Reapplication requires pretreatment of the fuels to make them safe to handle and to feed. Double-base nitrocellulose and nitroglycerin, trinitrotoluene (TNT), nitroguanidine, and a rocket propellant binder primarily composed of polybutidiene impregnated with aluminum flakes have been burned in a 100-kW downfired flow reactor. Most of these fuels have high levels of fuel-bound nitrogen, much of it bound in the form of nitrate groups, resulting in high NO{sub x} emissions during combustion. The authors have measured fuel-bound nitrate conversion efficiencies to NO{sub x} of up to 80%, suggesting that the nitrate groups do not follow the typical path of fuel nitrogen through HCN leading to NO{sub x}, but rather form NO{sub x} directly. They show that staged combustion is effective in reducing NO{sub x} concentrations in the postcombustion gases by nearly a factor of 3. In the rocket binder, measured aluminum particle temperatures in excess of 1700{degrees}C create high levels of thermal NO{sub x}, and also generate concern that molten aluminum particles could potentially damage boiler equipment. Judicious selection of the firing method is thus required for aluminum-containing materials.

  9. Bipropellant propulsion with reciprocating pumps

    NASA Astrophysics Data System (ADS)

    Whitehead, John C.

    1993-06-01

    A pressure regulated gas generator rocket cycle with alternately pressurized pairs of reciprocating pumps offers thrust-on-demand operation with significantly lower inert mass than conventional spacecraft liquid propulsion systems. The operation of bipropellant feed systems with reciprocating pumps is explained, with consideration for both short and long term missions. There are several methods for startup and shutdown of this self-starting pump-fed system, with preference determined by thrust duty cycle and mission duration. Progress to date includes extensive development testing of components unique to this type of system, and several live tests with monopropellant hydrazine. Pneumatic pump control valves which render pistons and bellows automatically responsive to downstream liquid demand are significantly simpler than those described previously. A compact pumpset mounted to central liquid manifolds has a pair of oxidizer pumps pneumatically slaved to a pair of fuel pumps to reduce vibration. A warm gas pressure reducer for tank expulsion can eliminate any remaining need for inert gas storage.

  10. 18. Electrically driven pumps in Armory Street Pump House. Pumps ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Electrically driven pumps in Armory Street Pump House. Pumps in background formerly drew water from the clear well. They went out of service when use of the beds was discontinued. Pumps in the foreground provide high pressure water to Hamden. - Lake Whitney Water Filtration Plant, Armory Street Pumphouse, North side of Armory Street between Edgehill Road & Whitney Avenue, Hamden, New Haven County, CT

  11. Feeding Tubes

    MedlinePlus

    ... Feeding Tubes Health Information Sheet Q & A with Experts Patient Stories Social Security Disability Application Process For Kids ... Feeding Tubes Health Information Sheet Q & A with Experts Patient Stories Social Security Disability Application Process For Kids ...

  12. Screw pumps cost effective for heavy crude operations

    SciTech Connect

    Brennan, J.R. )

    1992-12-21

    This paper reports that in petroleum production, screw pumps fulfill the requirements for pumping crude oil with an API gravity of 20[degrees] or less (0.93 sp gr or greater). In many cases, these pumps provide more efficiency than centrifugal and reciprocating pumps. Heavy crude oils typically have viscosities at pumping temperatures in excess of 500 SSU (100 cSt). While screw pumps can handle viscosities ranging from fractional centistokes to millions of centistokes, the normal range for crude oil, from cost and efficiency viewpoints, is above 100 SSU (20 cSt). Bitumens can also be handled by screw pumps. Invented in 1922, rotary, positive-displacement multiple-screw pumps have been used for pumping fuel for burning, lubricating oil, fluid power, process feed, food, chemicals, synthetic-fiber slurries, general transfer, and many other applications.

  13. [Enteral tube feeding].

    PubMed

    Haller, Alois

    2014-03-01

    Tube feeding is an integral part of medical therapies, and can be easily managed also in the outpatient setting. Tube feeding by the stomach or small intestine with nasogastral or nasojejunal tubes is common in clinical practice. Long-term nutrition is usually provided through a permanent tube, i. e. a percutaneous endoscopic gastrostomy (PEG). Modern portable nutrition pumps are used to cover the patient's nutritional needs. Enteral nutrition is always indicated if patients can not or should not eat or if nutritional requirements cannot be covered within 3 days after an intervention, e. g. after abdominal surgery. Industrially produced tube feedings with defined substrate concentrations are being used; different compositions of nutrients, such as glutamine fish oil etc., are used dependent on the the condition of the patient. Enteral nutrition may be associated with complications of the tube, e. g. dislocation, malposition or obstruction, as well as the feeding itself, e. g.hyperglycaemia, electrolyte disturbances, refeeding syndrome diarrhea or aspiration). However, the benefit of tube feeding usually exceeds the potential harm substantially.

  14. Stationary Engineers Apprenticeship. Related Training Modules. 12.1-12.9. Boilers.

    ERIC Educational Resources Information Center

    Lane Community Coll., Eugene, OR.

    This learning module, one in a series of 20 related training modules for apprentice stationary engineers, deals with boilers. Addressed in the individual instructional packages included in the module are the following topics: firetube and watertube boilers; boiler construction; procedures for operating and cleaning boilers; and boiler fittings,…

  15. 46 CFR 63.25-3 - Electric hot water supply boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Electric hot water supply boilers. 63.25-3 Section 63.25... AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-3 Electric hot water supply boilers. (a) Electric hot water supply boilers that have a capacity not greater than...

  16. 46 CFR 63.25-3 - Electric hot water supply boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Electric hot water supply boilers. 63.25-3 Section 63.25... AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-3 Electric hot water supply boilers. (a) Electric hot water supply boilers that have a capacity not greater than...

  17. 46 CFR 63.25-3 - Electric hot water supply boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Electric hot water supply boilers. 63.25-3 Section 63.25... AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-3 Electric hot water supply boilers. (a) Electric hot water supply boilers that have a capacity not greater than...

  18. 46 CFR 63.25-3 - Electric hot water supply boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Electric hot water supply boilers. 63.25-3 Section 63.25... AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-3 Electric hot water supply boilers. (a) Electric hot water supply boilers that have a capacity not greater than...

  19. 46 CFR 63.25-3 - Electric hot water supply boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Electric hot water supply boilers. 63.25-3 Section 63.25... AUXILIARY BOILERS Requirements for Specific Types of Automatic Auxiliary Boilers § 63.25-3 Electric hot water supply boilers. (a) Electric hot water supply boilers that have a capacity not greater than...

  20. Design for a 350 MWe class CFB boiler

    SciTech Connect

    Darling, S.L.

    1998-07-01

    This paper describes Foster Wheeler's design for a 350 MWe Class boiler. Foster Wheeler's experience with large CFB boilers and with large suspension fired boilers is summarized. A reference 350 MWe CFB boiler design is presented and major design features are described along with expected performance. Areas in the CFB boiler design which benefit from suspension from boiler experience are highlighted. CFB boilers are now proven in the 150--250 MWe size range, with several in operation and many others scheduled to begin operation this year. The next step for CFB boiler technology is the 300 - 400 MWe size range. This paper will describe Foster Wheeler's design for a 350 MWe class CFB boiler, including the major design features and anticipated performance. The authors will demonstrate how Foster Wheeler's experience in designing large suspension-fired boilers in sizes over 900 MWe has been applied to the 350 MWe class CFB, in order to minimize scale-up risk and ensure high reliability. This design will bring the benefits of CFB technology, which include flexibility and low emissions, to the 350 MWe size range.

  1. Startup, Commissioning and Operation of Fenyi 100MW CFB Boiler

    NASA Astrophysics Data System (ADS)

    Wang, Zhiwei; Yu, Wugao; Bo, Shi

    The first 100MW CFB boiler, designed by the Thermal Power Research Institute and manufactured by Harbin Boiler Company Limited, has been successfully running in Jiangxi Fenyi Power Plant since 2003. Local high ash content anthracite and lean coal that are very difficult to burn out are used in the 100 MW CFB boiler. The results of the 100MW CFB boiler shows that the CFB boiler can run in 30% MCR and startup with two under bed burners, and the boiler efficiency higher than 88% can be got after the combustion modification test. The CFB boiler can be operated with full load and reaches design parameters. The emissions of NO, N2O and CO are less than 7Omg/m3, 30mg/m3, and 125mg/m3, respectively, and SO2 less than 400mg/m3 after limestone injection. The bottom ash temperature from bed ash coolers is less than 120°C after its modification. Coal blockage at the coal storage silo is the main problem influencing the CFB boiler continuous operation. The running experiences for 5 years proved that the CFB boiler performance is successful, and the results were applied in 210 MW and 330 MW CFB Boiler design of Fenyi Power Plant.

  2. Guide to Low-Emission Boiler and Combustion Equipment Selection

    SciTech Connect

    Oland, CB

    2002-05-06

    Boiler owners and operators who need additional generating capacity face a number of legal, political, environmental, economic, and technical challenges. Their key to success requires selection of an adequately sized low-emission boiler and combustion equipment that can be operated in compliance with emission standards established by state and federal regulatory agencies. Recognizing that many issues are involved in making informed selection decisions, the U.S. Department of Energy (DOE), Office of Industrial Technologies (OIT) sponsored efforts at the Oak Ridge National Laboratory (ORNL) to develop a guide for use in choosing low-emission boilers and combustion equipment. To ensure that the guide covers a broad range of technical and regulatory issues of particular interest to the commercial boiler industry, the guide was developed in cooperation with the American Boiler Manufacturers Association (ABMA), the Council of Industrial Boiler Owners (CIBO), and the U.S. Environmental Protection Agency (EPA). The guide presents topics pertaining to industrial, commercial, and institutional (ICI) boilers. Background information about various types of commercially available boilers is provided along with discussions about the fuels that they burn and the emissions that they produce. Also included are discussions about emissions standards and compliance issues, technical details related to emissions control techniques, and other important selection considerations. Although information in the guide is primarily applicable to new ICI boilers, it may also apply to existing boiler installations.

  3. Heat pump

    SciTech Connect

    Apte, A.J.

    1982-11-30

    A single working fluid heat pump system having a turbocompressor with a first fluid input for the turbine and a second fluid input for the compressor, and a single output volute or mixing chamber for combining the working fluid output flows of the turbine and the compressor. The system provides for higher efficiency than single fluid systems whose turbine and compressor are provided with separate output volutes.

  4. Solar Pump

    NASA Technical Reports Server (NTRS)

    Pique, Charles

    1987-01-01

    Proposed pump moves liquid by action of bubbles formed by heat of sun. Tube of liquid having boiling point of 100 to 200 degrees F placed at focal axis of cylindrical reflector. Concentrated sunlight boils liquid at focus, and bubbles of vapor rise in tube, carrying liquid along with them. Pressure difference in hot tube sufficient to produce flow in large loop. Used with conventional flat solar heating panel in completely solar-powered heat-storage system.

  5. Oxy-Combustion Boiler Material Development

    SciTech Connect

    Gagliano, Michael; Seltzer, Andrew; Agarwal, Hans; Robertson, Archie; Wang, Lun

    2012-01-31

    Under U.S. Department of Energy Cooperative Agreement No. DE-NT0005262 Foster Wheeler North America Corp conducted a laboratory test program to determine the effect of oxy-combustion on boiler tube corrosion. In this program, CFD modeling was used to predict the gas compositions that will exist throughout and along the walls of air-fired and oxy-fired boilers operating with low to high sulfur coals. Test coupons of boiler tube materials were coated with deposits representative of those coals and exposed to the CFD predicted flue gases for up to 1000 hours. The tests were conducted in electric tube furnaces using oxy-combustion and air-fired flue gases synthesized from pressurized cylinders. Following exposure, the test coupons were evaluated to determine the total metal wastage experienced under air and oxy-combustions conditions and materials recommendations were made. Similar to air-fired operation, oxy-combustion corrosion rates were found to vary with the boiler material, test temperature, deposit composition, and gas composition. Despite this, comparison of air-fired and oxy-fired corrosion rates showed that oxy-firing rates were, for the most part, similar to, if not lower than those of air-firing; this finding applied to the seven furnace waterwall materials (wrought and weld overlay) and the ten superheater/reheater materials (wrought and weld overlay) that were tested. The results of the laboratory oxy-combustion tests, which are based on a maximum bulk flue gas SO2 level of 3200 ppmv (wet) / 4050 ppmv (dry), suggest that, from a corrosion standpoint, the materials used in conventional subcritical and supercritical, air-fired boilers should also be suitable for oxy-combustion retrofits. Although the laboratory test results are encouraging, they are only the first step of a material evaluation process and it is recommended that follow-on corrosion tests be conducted in coal-fired boilers operating under oxy-combustion to provide longer term (one to two year

  6. Oxy-Combustion Boiler Material Development

    SciTech Connect

    Michael Gagliano; Andrew Seltzer; Hans Agarwal; Archie Robertson; Lun Wang

    2012-01-31

    Under U.S. Department of Energy Cooperative Agreement No. DE-NT0005262 Foster Wheeler North America Corp conducted a laboratory test program to determine the effect of oxy-combustion on boiler tube corrosion. In this program, CFD modeling was used to predict the gas compositions that will exist throughout and along the walls of air-fired and oxy-fired boilers operating with low to high sulfur coals. Test coupons of boiler tube materials were coated with deposits representative of those coals and exposed to the CFD predicted flue gases for up to 1000 hours. The tests were conducted in electric tube furnaces using oxy-combustion and air-fired flue gases synthesized from pressurized cylinders. Following exposure, the test coupons were evaluated to determine the total metal wastage experienced under air and oxy-combustions conditions and materials recommendations were made. Similar to air-fired operation, oxy-combustion corrosion rates were found to vary with the boiler material, test temperature, deposit composition, and gas composition. Despite this, comparison of air-fired and oxy-fired corrosion rates showed that oxy-firing rates were, for the most part, similar to, if not lower than those of air-firing; this finding applied to the seven furnace waterwall materials (wrought and weld overlay) and the ten superheater/reheater materials (wrought and weld overlay) that were tested. The results of the laboratory oxy-combustion tests, which are based on a maximum bulk flue gas SO{sub 2} level of 3200 ppmv (wet) / 4050 ppmv (dry), suggest that, from a corrosion standpoint, the materials used in conventional subcritical and supercritical, air-fired boilers should also be suitable for oxy-combustion retrofits. Although the laboratory test results are encouraging, they are only the first step of a material evaluation process and it is recommended that follow-on corrosion tests be conducted in coal-fired boilers operating under oxy-combustion to provide longer term (one to

  7. Process to improve boiler operation by supplemental firing with thermally beneficiated low rank coal

    DOEpatents

    Sheldon, Ray W.

    2001-01-01

    The invention described is a process for improving the performance of a commercial coal or lignite fired boiler system by supplementing its normal coal supply with a controlled quantity of thermally beneficiated low rank coal, (TBLRC). This supplemental TBLRC can be delivered either to the solid fuel mill (pulverizer) or directly to the coal burner feed pipe. Specific benefits are supplied based on knowledge of equipment types that may be employed on a commercial scale to complete the process. The thermally beneficiated low rank coal can be delivered along with regular coal or intermittently with regular coal as the needs require.

  8. Design of a 110 MWth CFB boiler firing RDF, rejects, sewage sludge, wood waste and coal

    SciTech Connect

    Rosenauer, G.; Hoelblinger, W.; Cleve, K.

    1997-12-31

    The consortium Austrian Energy and LLB Lurgi Lentjes Babcock Energietechnik GmbH was awarded the contract to build a 110 MWth CFB Plant in Lenzing, Austria. The plant will be started up in the fall of 1998 and is in the design state right now. The objective of the plant is to burn various fuels to overcome the challenges of waste fuel utilization. The main fuel to be burnt will be RDF. Additional fuels will be rejects, sewage sludge, wood waste and coal. The design of the plant is based on the Lurgi circulating fluidized bed technology. The boiler system and the fuel feeding systems will be supplied by Austrian Energy.

  9. Mercury Emission and Removal of a 135MW CFB Utility Boiler

    NASA Astrophysics Data System (ADS)

    Duan, Y. F.; Zhuo, Y. Q.; Wang, Y. J.; Zhang, L.; Yang, L. G.; Zhao, C. S.

    To evaluate characteristic of the mercury emission and removal from a circulating fluidized bed (CFB) boiler, a representative 135 MW CFB utility boiler was selected to take the onsite measurement of mercury concentrations in feeding coal, bottom ash, fly ash and flue gas using the US EPA recommended Ontario Hydro Method (OHM). The results show that particulate mercury is of majority in flue gas of the CFB boiler. Mercury removal rate of the electrostatic precipitator (ESP) reaches 98%. Mercury emission concentration in stack is only 0.062μg/Nm3, and the mass proportion of mercury in bottom ash is less than 1%. It was found that the fly ashes were highly adsorptive to flue gas mercury because of its higher unburned carbon content. Adsorption effect is related to carbon pore structural properties of fly ash and temperature of flue gas. However mercury adsorption capacity by fly ash can not be improved any more when unburned carbon content in fly ash increases further.

  10. Energy saving pump and pumping system

    SciTech Connect

    Chang, K.C.

    1983-08-02

    A centrifugal pump and a pumping system are disclosed that recover hydraulic energy in response to flow capacity reduction and spontaneously provide a recirculating flow at low capacities when pump cooling is needed. From a upstream source the fluid is guided by two suction lines to two parallel pumping mechanisms housed by a common discharge casing. Said pumping mechanisms have a combined hydraulic characteristic that the first pumping mechanism will force a reverse flow through the second pumping mechanism, when pump discharge is reduced by the system below a certain low flow rate. The reverse flow will then return to the upstream fluid source through a suction line. The pump is the protected from overheating by a circulating flow at low flow capacities. At the same time, said reverse flow generates a turbine action on the second pumping mechanism and transmits the contained hydraulic energy back to the rotor and thereby results in power saving at low flow capacities.

  11. Novel Surface Modification Method for Ultrasupercritical Coal-Fired Boilers

    SciTech Connect

    Xiao, T. Danny

    2013-05-22

    US Department of Energy seeks an innovative coating technology for energy production to reduce the emission of SOx, NOx, and CO2 toxic gaseous species. To realize this need, Inframat Corporation (IMC) proposed an SPS thermal spray coating technique to produce ultrafine/nanocoatings that can be deposited onto the surfaces of high temperature boiler tubes, so that higher temperatures of boiler operation becomes possible, leading to significantly reduced emission of toxic gaseous species. It should be noted that the original PI was Dr. Xinqing Ma, who after 1.5 year conducting this project left Inframat in December, 2008. Thus, the PI was transferred to Dr. Danny Xiao, who originally co-authored the proposal with Dr. Ma, in order to carry the project into a completion. Phase II Objectives: The proposed technology has the following attributes, including: (1). Dispersion of a nanoparticle or alloyed particle in a solvent to form a uniform slurry feedstock; (2). Feeding of the slurry feedstock into a thermal spray flame, followed by deposition of the slurry feedstock onto substrates to form tenacious nanocoatings; (3). High coating performance: including high bonding strength, and high temperature service life in the temperature range of 760oC/1400oF. Following the above premises, our past Phase I project has demonstrated the feasibility in small scale coatings on boiler substrates. The objective of this Phase II project was to focus on scale-up the already demonstrated Phase I work for the fabrication of SPS coatings that can satisfy DOE's emission reduction goals for energy production operations. Specifically, they are: (1). Solving engineering problems to scale-up the SPS-HVOF delivery system to a prototype production sub-delivery system; (2). Produce ultrafine/nanocoatings using the scale-up prototype system; (3). Demonstrate the coated components using the scale-up device having superior properties. Proposed Phase II Tasks: In the original Phase II proposal, we have

  12. On the coupled system performance of transcritical CO2 heat pump and rankine cycle

    NASA Astrophysics Data System (ADS)

    Wang, Hongli; Tian, Jingrui; Hou, Xiujuan

    2013-12-01

    As one of the natural refrigerants, CO2 is a potential substitute for synthesized refrigerants with favorable environmental properties. In order to improve the performance of rankine cycle (RankC), the coupled system cycle (CSC) was designed and the performance was analyzed in this paper, which the CSC is combined by the RankC and the transcritical CO2 heat pump cycle with an expander. Based on thermodynamic principles, the performance analysis platform was designed and the performance analysis was employed. The results show that the average efficiency of the RankC is about 30 %, and the extraction cycle is about 32 %, while the CSC is about 39 %, and the last one is better than the others at the same parameters. With increasing of the boiler feed water temperature, the efficiencies of the three kinds of cycles show increasing trend. With increasing of pressure in conderser-evaporator or outlet temperature of gas cooler, the efficiency of the CSC shows a downward trend. Some fundamental data were obtained for increasing the RankC efficiency by waste heat recovery, and play an active role in improvement the efficiency of power plants.

  13. Metallurgical failures in fossil fired boilers

    SciTech Connect

    French, D.N.

    1983-01-01

    Forty case histories of boiler shut downs resulting from metallurgical failures are presented. Reasons for the failures are traced, and the fundamentals of elementary metallurgy are explained to help non-metallurgists understand these practical examples. The full range of expected tube failures is covered, including microstructural changes, high temperature and creep ruptures, corrosion caused by poor steam side chemistry, fuel ash corrosion, and weld problems. Cases that relate steam-side conditions with fireside oxidation, corrosion and creep failures are provided. The effects of misuse or thermal abuse are also presented. Finally, there is a discussion of boiler design in terms of how to avoid these problems, minimize service failures, and improve maintenance.

  14. Innovative boiler master design improves system response

    SciTech Connect

    Keller, G.; Baker, B.; Jones, R.J.

    2007-02-15

    A quick and nimble boiler distributed control system can end up moving at the speed of molasses in winter after a low-NOx retrofit. In one utility fleet, several units, despite being equipped with a modern DCS, were experiencing firing system time lags and degraded dynamic loading capability. Swinging steam pressures and opacity excursions were forcing operators to constantly remove the unit from the load dispatch. Following a discussion of the new boiler control strategy, this article presents three studies detailing its installation at four coal-fired units owned and operated by the Kentucky Utilities (KU) subsidiary of E.ON US. The 495-MW Unit 3 of E.W. Brown Generating Station; the 75-MW Unit 3 of Tyrone Generating Station and the 75-MW Unit 3 and 100-MW Unit 4 of Green River Generating Station. Coal-fired plants produce about 95% of Kentucky's total generation. 4 figs.

  15. Maximising safety in the boiler house.

    PubMed

    Derry, Carr

    2013-03-01

    Last month's HEJ featured an article, the second in our new series of guidance pieces aimed principally at Technician-level engineers, highlighting some of the key steps that boiler operators can take to maximise system performance and efficiency, and thus reduce running both costs and carbon footprint. In the third such article, Derry Carr, C.Env, I.Eng, BSc (Hons), M.I.Plant.E., M.S.O.E., technical manager & group gas manager at Dalkia, who is vice-chairman of the Combustion Engineering Association, examines the key regulatory and safety obligations for hospital energy managers and boiler technicians, a number of which have seen changes in recent years with revision to guidance and other documentation.

  16. A vision for reducing boiler tube failures

    SciTech Connect

    Dooley, B. )

    1992-03-01

    This paper reports that the boiler tube failure (BTF) problem still ranks as the number one equipment problem in fossil power plants. According to the North American Electric Reliability Council, BTF has been in this position in North America for the 28 years that reliability statistics have been kept. Currently BTF represents about 3-4% of lost availability. Previous analysis has indicated that a disturbing feature of these failures is that most of them are repeats. They occur on the same tube, same material, or in the same boiler section over and over again. Assessing the multifunctional nature of BTF, it became apparent in 1985 that the only way to prevent forced outages due to repeat tube failure problems was to implement a formalized, company-wide BTF prevention program. Thus, in a parallel effort to the root cause determinations, 16 utilities demonstrated such an approach over a four-year period and achieved remarkable availability improvements.

  17. Particulate Emission Abatement for Krakow Boiler Houses

    SciTech Connect

    1998-09-01

    Environmental clean-up and pollution control are considered the foremost national priorities in Poland. The target of this cleanup is the Polish coal industry, which currently comprises over 78% of Poland`s primary energy production. This project addresses the problem of airborne dust and uncontrolled particulate emissions from boilerhouses, which represent a large fraction of the total in Poland. In Krakow alone, there are more than 2,000 uncontrolled boilers accounting for about half the total fuel use. The large number of low- capacity boilers poses both technical and economic challenges, since the cost of control equipment is a significant factor in the reduction of emissions. A new concept in dust collection, called a Core Separator, is proposed for this important application. The Core Separator is an advanced technology developed through research sponsored by the Department of Energy.

  18. Specification considerations for a circulating fluidized bed boiler

    SciTech Connect

    Liu, E.H.; Surabian, M. )

    1988-01-01

    The circulating fluidized bed (CFB) boiler is gradually gaining acceptance in both the industrial and utility sectors for electric power generation. Boiler steaming capacity in CFBs has increased to over a million pounds per hour in the most recent units. Many CFB units commisioned during the last few years worldwide have had difficult and extended start-up periods, but this experience has provided a good base of feedback for future units. There has been widespread use of the same criteria for a conventional pulverized coal or stoker boiler to specify the CFB boiler. This paper examines the unique design aspects of a CFB boiler and provides suggestions in the areas where specific requirements should be included in the specification of the boiler and its related systems. Areas examined include fuel handling area, burner systems, the combustor, cyclone and solids recirculation equipment, convention pass, the design and installation of refractories, fans and blowers, bed ash removal system, and particulate control equipment.

  19. Operating experience of Pyroflow boilers in a 250 MWe unit

    SciTech Connect

    Chelian, P.K.; Hyvarinen, K.

    1995-12-31

    The Cedar Bay Cogeneration project is a 250 MWe unit owned and operated by US Generating Company. This plant has one turbine rated at 250 MWe net which is supplied by three Pyroflow CFB boilers that operate in parallel while supplying a paper mill with steam on an uninterruptible basis. Compared to similar size CFB boilers the Cedar Bay boilers have certain unique features. First, these are reheat boilers which must continue to supply process steam even when the steam turbine is down. Second, the SO{sub 2} control operates at a very low Ca/S molar ratio by optimizing the process conditions and flyash reinjection. Third, the NO{sub x} reduction process utilizes aqueous ammonia injection. This paper presents the operating data at full load in terms of boiler efficiency, and the ability to limit gaseous emissions with minimum limestone and ammonia usage. Unique features relating to the multiple boiler installation are also discussed.

  20. Design considerations of B&W internal circulation CFB boilers

    SciTech Connect

    Kavidass, S.; Alexander, K.C.

    1995-12-31

    Worldwide, the use of Circulating Fluidized-Bed (CFB) boiler technology is rapidly increasing due to the ability to burn low grade fuels while meeting the required NO{sub x}, SO{sub 2}, CO, VOC, and particulate emissions requirements. The CFB boiler can produce steam economically for process and electric power generation. This paper discusses various aspects of Babcock & Wilcox (B&W) internal recirculation circulating fluidized-bed (IR-CFB) boiler design including fuel, boiler process parameters, and emissions. The B&W CFB boiler is unique in design. It utilizes proven impact-type particle separators (U-beams) with in-furnace solids recirculation. The paper describes the methodology for setting up process parameters, heat duty, boiler design, including auxiliary equipment selection and advantages.

  1. Field Test of Boiler Primary Loop Temperature Controller

    SciTech Connect

    Glanville, P.; Rowley, P.; Schroeder, D.; Brand, L.

    2014-09-01

    Beyond these initial system efficiency upgrades are an emerging class of Advanced Load Monitoring (ALM) aftermarket controllers that dynamically respond to the boiler load, with claims of 10% to 30% of fuel savings over a heating season. For hydronic boilers specifically, these devices perform load monitoring, with continuous measurement of supply and, in some cases, return water temperatures. Energy savings from these ALM controllers are derived from dynamic management of the boiler differential, where a microprocessor with memory of past boiler cycles prevents the boiler from firing for a period of time, to limit cycling losses and inefficient operation during perceived low load conditions. These differ from OTR controllers, which vary boiler setpoint temperatures with ambient conditions while maintaining a fixed differential.

  2. A Rule-Based Industrial Boiler Selection System

    NASA Astrophysics Data System (ADS)

    Tan, C. F.; Khalil, S. N.; Karjanto, J.; Tee, B. T.; Wahidin, L. S.; Chen, W.; Rauterberg, G. W. M.; Sivarao, S.; Lim, T. L.

    2015-09-01

    Boiler is a device used for generating the steam for power generation, process use or heating, and hot water for heating purposes. Steam boiler consists of the containing vessel and convection heating surfaces only, whereas a steam generator covers the whole unit, encompassing water wall tubes, super heaters, air heaters and economizers. The selection of the boiler is very important to the industry for conducting the operation system successfully. The selection criteria are based on rule based expert system and multi-criteria weighted average method. The developed system consists of Knowledge Acquisition Module, Boiler Selection Module, User Interface Module and Help Module. The system capable of selecting the suitable boiler based on criteria weighted. The main benefits from using the system is to reduce the complexity in the decision making for selecting the most appropriate boiler to palm oil process plant.

  3. Boiler Control Systems Oxygen Trim Systems Manual.

    DTIC Science & Technology

    1983-02-01

    measurement , and how these measurements can be used to improve the boiler efficiency. Section 4.0 identifies the various combustion air trim systems that can...with the oxygen in air to form various gases, the formation of which results in the release of large amounts of heat referred to as the heat of...method of combustion optimization is just as effective. Carbon monoxide concentration is independent of excess air and is a direct measure of

  4. Anthracite culm fired fluidized-bed boiler

    SciTech Connect

    Lentz, E.C.

    1984-01-01

    The author describes a fluidised-bed boiler that has been designed by FluiDyne Engineering Corp. for the combustion of anthracite culm, a material containing about 40% ash and consisting of coal particles embedded in mineral matter. There are some 900 million tons of anthracite culm in northeast Pennsylvania within easy reach of many large metropolitan areas. It is estimated that the material can be used economically within a distance of 200 miles.

  5. Stress-enhanced corrosion of boiler tubing

    SciTech Connect

    Esmacher, M.J.

    1987-05-01

    Five case histories are presented on the effect of residual stresses (from fabrication or welding) on the waterside corrosion performance of carbon steel boiler tubing. Specifically, cases are reviewed in which tube swaging or tube bending operations (producing high forming stresses in deformed zones) resulted in the formation of stress-enhanced corrosion cells. In addition, the phenomenon of accelerated corrosion in welded support zones, membrane-welded panel sections, and weld-repaired areas is discussed.

  6. Fluidized Bed Boiler Assessment for Navy Applications

    DTIC Science & Technology

    1986-11-01

    inertia and latent heat stored in the bed material allow newly added fuel to ignite quickly and evenly; even wet or low-quality fuels can be burned...about 97% inert bed material (e.g., sand) and 3% fuel. The upper bed is composed of finely ground sulfur sorbent and is where desulfurization of...can be burned without the need of the expensive back-end desulfurization equipment. In fact, most FBC boilers can practically burn all combustible

  7. DISK PUMP FEASIBILITY INVESTIGATION,

    DTIC Science & Technology

    The disk pump was investigated at the Air Force Rocket Propulsion Laboratory (AFRPL) to determine the feasibility of using a novel viscous pumping... pump primarily for application as an inducer. The disk pump differs drastically from conventional pumps because of the following major factors: (1) The...The pump inlet relative velocity is equal only to the through flow velocity between the disks. Therefore, there is good indication that the disk pump will

  8. Performance testing of feedwater pump turbines

    SciTech Connect

    Finck, E.J.

    1980-01-01

    Utilities acknowledge that steam turbine drives for feedwater pumps outperform motor drives in improving station heat rate. Rising fuel prices frequently make steam costs the determining factor in evaluating feedwater pump drive turbines. Decisions made on efficiency differences as small as 0.2 percent often necessitate accurate performance testing to verify quoted efficiencies, making it imperative that accurate tests of turbine throttle flow, shaft speed and torque, and other parameters be run to ensure meaningful results. A highly specialized feed pump turbine manufacturers test facility is the most accurate testing method as well as the most convenient and potentially the most economical. 4 figures.

  9. National Emission Standards for Hazardous Air Pollutants (NESHAP) for Area Source Boilers Tune-up Guides

    EPA Pesticide Factsheets

    This page contains two tune-up guides for area source boilers for industrial, commercial, and institutional boilers and process heaters. The first guide is for owners and operators, and the second is for technicians for the area source boilers.

  10. Conversion of packaged boiler to micronized coal cuts operating cost

    SciTech Connect

    Schwieger, B.

    1984-05-01

    The use of micronised coal can be an alternative to the purchase of new coal-fired boilers, since, in many cases, this fuel can be burned in existing oil- and gas-fired boilers with acceptable derating. The experience is quoted of Idaho Supreme, a potato processing company, where a packaged boiler designed to operate on oil and wood has been successfully run on micronised coal.

  11. 33. 20HORSE POWER VERTICAL BOILER WAS MANUFACTURED BY ORR & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. 20-HORSE POWER VERTICAL BOILER WAS MANUFACTURED BY ORR & SEMBOWER, FROM READING, PA. IT WAS INSTALLED IN 1929 TO REPLACE THE ORIGINAL BOILER. THE BOILER PROVIDED STEAM TO THE STEAM ENGINE. TO LUBRICATING THE DIE OF THE BRICK AUGER, AND TO THE STEAM PIPES OF THE DRYING ROOM ON THE FLOOR ABOVE. - Moravian Pottery & Tile Works, Southwest side of State Route 313 (Swamp Road), Northwest of East Court Street, Doylestown, Bucks County, PA

  12. 16. View into interior steam spaces of boiler above fireboxes ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. View into interior steam spaces of boiler above fireboxes through manhole (see photo VT-14-16 for manhole location). Tops-or crown sheets--of fireboxes show below. Vertical and inclined bars are stays used to hold boiler together and reinforce flat plates under pressure. Note water level used in boilers indicated by scale encrustation on stays. (Threaded stud in extreme foreground belongs to manhole cover opened for purposed of photography.) - Ferry TICONDEROGA, Route 7, Shelburne, Chittenden County, VT

  13. 27. VIEW OF SOUTHERN PORTION OF EAST BOILER ROOM LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. VIEW OF SOUTHERN PORTION OF EAST BOILER ROOM LOOKING EAST AT UPPER PORTION BOILER 904. BOILER 904 WAS MANUFACTURED BY RILEY STOKER AND INSTALLED IN 1944. ORIGINALLY FUELED BY PULVERIZED COAL, IT WAS CONVERTED TO GAS/OIL OPERATION IN 1978 AND OPERATED UNTIL THE PLANT CLOSED. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  14. Contributions to the use of macrosounds for boiler decrusting

    NASA Technical Reports Server (NTRS)

    Bradeteanu, C.

    1974-01-01

    The results of an investigation indicate the following: (1) The deposition of incrustations on the heating surfaces of steam boilers can be prevented by inserting between heating surface and water an insulating layer on which the boiler incrustation will be deposited. (2) The insulating layer reduces the coefficient of heat transmission by 2%. (3) The insulating layer can be removed by macrosounds with a frequency of about 20 kHz, after any interval of boiler operation.

  15. BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS

    SciTech Connect

    R. Viswanathan; K. Coleman; R.W. Swindeman; J. Sarver; J. Blough; W. Mohn; M. Borden; S. Goodstine; I. Perrin

    2003-08-04

    The principal objective of this project is to develop materials technology for use in ultrasupercritical (USC) plant boilers capable of operating with 760 C (1400 F), 35 MPa (5000 psi) steam. This project has established a government/industry consortium to undertake a five-year effort to evaluate and develop of advanced materials that allow the use of advanced steam cycles in coal-based power plants. These advanced cycles, with steam temperatures up to 760 C, will increase the efficiency of coal-fired boilers from an average of 35% efficiency (current domestic fleet) to 47% (HHV). This efficiency increase will enable coal-fired power plants to generate electricity at competitive rates (irrespective of fuel costs) while reducing CO{sub 2} and other fuel-related emissions by as much as 29%. Success in achieving these objectives will support a number of broader goals. First, from a national prospective, the program will identify advanced materials that will make it possible to maintain a cost-competitive, environmentally acceptable coal-based electric generation option. High sulfur coals will specifically benefit in this respect by having these advanced materials evaluated in high-sulfur coal firing conditions and from the significant reductions in waste generation inherent in the increased operational efficiency. Second, from a national prospective, the results of this program will enable domestic boiler manufacturers to successfully compete in world markets for building high-efficiency coal-fired power plants.

  16. BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS

    SciTech Connect

    R. Viswanathan; K. Coleman; R.W. Swindeman; J. Sarver; J. Blough; W. Mohn; M. Borden; S. Goodstine; I. Perrin

    2003-10-20

    The principal objective of this project is to develop materials technology for use in ultrasupercritical (USC) plant boilers capable of operating with 760 C (1400 F), 35 MPa (5000 psi) steam. This project has established a government/industry consortium to undertake a five-year effort to evaluate and develop of advanced materials that allow the use of advanced steam cycles in coal-based power plants. These advanced cycles, with steam temperatures up to 760 C, will increase the efficiency of coal-fired boilers from an average of 35% efficiency (current domestic fleet) to 47% (HHV). This efficiency increase will enable coal-fired power plants to generate electricity at competitive rates (irrespective of fuel costs) while reducing CO{sub 2} and other fuel-related emissions by as much as 29%. Success in achieving these objectives will support a number of broader goals. First, from a national prospective, the program will identify advanced materials that will make it possible to maintain a cost-competitive, environmentally acceptable coal-based electric generation option. High sulfur coals will specifically benefit in this respect by having these advanced materials evaluated in high-sulfur coal firing conditions and from the significant reductions in waste generation inherent in the increased operational efficiency. Second, from a national prospective, the results of this program will enable domestic boiler manufacturers to successfully compete in world markets for building high-efficiency coal-fired power plants.

  17. Maintenance aspects of boiler tube failures

    SciTech Connect

    Dooley, B.; McNaughton, W.

    1996-07-01

    Boiler tube failures (BTF) remain the number one availability problem in the fossil-fueled power industry. The authors have recently prepared a three-volume book on all aspects of BTF. One of the key areas in the ultimate alleviation of tube failures is proper maintenance activities. This paper thoroughly reviews the areas where improper maintenance leads directly to repeat failures. Problems typically develop from: (i) improper chemical cleaning, (ii) improper repairs, such as the use of palliative or {open_quotes}band-aid{close_quotes} repairs: coatings, pad welding, weld overlay, improper welding activities etc., or (iii) improperly executed maintenance procedures such as can occur with sootblowing. The paper discusses these three topics as they pertain to boiler tube failures. Also discussed are five boiler tube failure mechanisms and how they are influenced by maintenance activities: (i) flyash erosion, (ii) waterwall underdeposit corrosion mechanisms, (iii) short-term overheating in waterwalls, (iv) short-term overheating in SH/RH tubes, and (v) damage directly induced by maintenance operations. A vision of where the authors expect the industry will move over the next five years is presented.

  18. Particulate emission abatement for Krakow boiler houses

    SciTech Connect

    Wysk, R.

    1995-12-31

    Among the many strategies for improving air quality in Krakow, one possible method is to adapt new and improved emission control technology. This project focuses on such a strategy. In order to reduce dust emissions from coal-fueled boilers, a new device called a Core Separator has been introduced in several boiler house applications. This advanced technology has been successfully demonstrated in Poland and several commercial units are now in operation. Particulate emissions from the Core Separator are typically 3 to 5 times lower than those from the best cyclone collectors. It can easily meet the new standard for dust emissions which will be in effect in Poland after 1997. The Core Separator is a completely inertial collector and is based on a unique recirculation method. It can effectively remove dust particles below 10 microns in diameter, the so-called PM-10 emissions. Its performance approaches that of fabric filters, but without the attendant cost and maintenance. It is well-suited to the industrial size boilers located in Krakow. Core Separators are now being marketed and sold by EcoInstal, one of the leading environmental firms in Poland, through a cooperative agreement with LSR Technologies.

  19. Estimation of Scale Deposition in the Water Walls of an Operating Indian Coal Fired Boiler: Predictive Modeling Approach Using Artificial Neural Networks

    NASA Astrophysics Data System (ADS)

    Kumari, Amrita; Das, Suchandan Kumar; Srivastava, Prem Kumar

    2016-04-01

    Application of computational intelligence for predicting industrial processes has been in extensive use in various industrial sectors including power sector industry. An ANN model using multi-layer perceptron philosophy has been proposed in this paper to predict the deposition behaviors of oxide scale on waterwall tubes of a coal fired boiler. The input parameters comprises of boiler water chemistry and associated operating parameters, such as, pH, alkalinity, total dissolved solids, specific conductivity, iron and dissolved oxygen concentration of the feed water and local heat flux on boiler tube. An efficient gradient based network optimization algorithm has been employed to minimize neural predictions errors. Effects of heat flux, iron content, pH and the concentrations of total dissolved solids in feed water and other operating variables on the scale deposition behavior have been studied. It has been observed that heat flux, iron content and pH of the feed water have a relatively prime influence on the rate of oxide scale deposition in water walls of an Indian boiler. Reasonably good agreement between ANN model predictions and the measured values of oxide scale deposition rate has been observed which is corroborated by the regression fit between these values.

  20. Rocketdyne's advanced coal slurry pumping program

    NASA Technical Reports Server (NTRS)

    Davis, D. E.; Wong, G. S.; Gilman, H. H.

    1977-01-01

    The Rocketdyne Division of Rockwell International Corporation is conducting a program for the engineering, fabrication, and testing of an experimental/prototype high-capacity, high-pressure centrifugal slurry feed pump for coal liquefaction purposes. The abrasion problems in a centrifugal slurry pump are primarily due to the manner in which the hard, solid particles contained in the slurry are transported through the hydraulic flow passages within the pump. The abrasive particles can create scraping, grinding, cutting, and sandblasting effects on the various exposed parts of the pump. These critical areas involving abrasion and impact erosion wear problems in a centrifugal pump are being addressed by Rocketdyne. The mechanisms of abrasion and erosion are being studied through hydrodynamic analysis, materials evaluation, and advanced design concepts.

  1. Well pump

    SciTech Connect

    Page, J.S.

    1983-03-08

    Well fluid pumping apparatus comprises: (A) body structure defining an upright plunger bore, (B) a plunger reciprocable in that bore, (C) the body structure also defining a chamber sidewardly offset from an axis defined by the plunger bore and communicating with the bore, and (D) valving carried by the body structure to pass intake fluid via the chamber into the plunger bore in response to stroking of the plunger in one direction in the bore, and to pass discharge fluid from the plunger bore into and from the chamber in response to stroking of the plunger in the opposite direction in the bore.

  2. Well pump

    DOEpatents

    Ames, Kenneth R.; Doesburg, James M.

    1987-01-01

    A well pump includes a piston and an inlet and/or outlet valve assembly of special structure. Each is formed of a body of organic polymer, preferably PTFE. Each includes a cavity in its upper portion and at least one passage leading from the cavity to the bottom of the block. A screen covers each cavity and a valve disk covers each screen. Flexible sealing flanges extend upwardly and downwardly from the periphery of the piston block. The outlet valve block has a sliding block and sealing fit with the piston rod.

  3. Residual Strain Distribution in Bent Composite Boiler Tubes

    SciTech Connect

    Hubbard, Camden R; Gorti, Sarma B; Tang, Fei; Keiser, James R

    2006-01-01

    Kraft recovery boilers are typically constructed of carbon steel boiler tubes clad with a corrosion resistant layer, and these composite tubes are bent and welded together to form air port panels which enable the combustion air to enter the boiler. In this paper, the through-thickness residual strain in the carbon steel layer of non-heat-treated and heat-treated composite bent tubes were measured by neutron diffraction techniques and modeled by finite element modeling. The results can be used to optimize material selection and manufacturing processes to prevent stress corrosion and corrosion fatigue cracking in the boiler tubes.

  4. 13. RW Meyer Sugar Mill: 18761889. Engine and boiler house, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. RW Meyer Sugar Mill: 1876-1889. Engine and boiler house, ca. 1881. Locomotive-type, fire-tube, portable boiler, no. I model. Manufactured by Ames Iron Works, Oswego, New York, 1879. 120 lbs./sq. in. working pressure, 66 sq. ft. heating surface in tubes. View: Historical view, 1934, from T.T. Waterman Collection, Hawaiian Sugar Planters' Association. View shows engine and boiler house structure intact. The water and pressure gauge to the right of the boiler are in more complete condition than in 1978 views. - R. W. Meyer Sugar Mill, State Route 47, Kualapuu, Maui County, HI

  5. Design and Operation of CFB Boilers with Low Bed Inventory

    NASA Astrophysics Data System (ADS)

    Su, Jun; Zhao, Xiaoxing; Zhang, Jianchun; Liu, Aicheng; Yang, Hairui; Yue, Guangxi; Fu, Zhiping

    In this paper, the challenges and problems of the circulating fluidized bed (CFB) combustion technology are summarized and analyzed. In order to resolve the problems in CFB boiler application, design principals and method of CFB boiler with the low bed inventory is proposed by Taiyuan Boiler Group Co. Ltd., cooperated with Tsinghua University. And a full set of design code of new CFB boiler with low bed inventory has been developed, to design the product structure of new generation CFB boilers. The first CFB boiler product with the low inventory was placed and has been operated for two years in Datuhe Thermal Power Plant at Lishi, Shanxi province. The operation practice and measurement data show that the CFB boiler with the low bed inventory stands for the newest trend of the development of CFB boiler in the future. It is expected that more technical advantages will be shown when this technology is applied to the CFB boiler with larger capacity in the near future.

  6. Operational Status of 135MWe CFB Boilers in China

    NASA Astrophysics Data System (ADS)

    Lit, J. F.; Yang, S.; Haot, J. H.; Mit, J. H.; Lu, J. F.; Jit, H. M.; Huang, H. T.; Yan, H. R.; Yu, G. X.

    CFB boiler technology has been rapidly developed in China and China has the largest installed number and capacity of CFB boiler in the world. The number of 135MWe CFB boilers is over 150. The operational performance of 135MWe CFB boilers was summarized in the article. And the reliability, economy, environmental protection index are also discussed in the article. It not only provides information of the development status of CFB industry, but also provides some experience and guidance to improve the operation and to further develop CFB combustion technology.

  7. Design of a large-scale CFB boiler

    SciTech Connect

    Darling, S.; Li, S.

    1997-12-31

    Many CFB boilers sized 100--150 MWe are in operation, and several others sized 150--250 MWe are in operation or under construction. The next step for CFB technology is the 300--400 MWe size range. This paper will describe Foster Wheeler`s large-scale CFB boiler experience and the design for a 300 MWe CFB boiler. The authors will show how the design incorporates Foster Wheeler`s unique combination of extensive utility experience and CFB boiler experience. All the benefits of CFB technology which include low emissions, fuel flexibility, low maintenance and competitive cost are now available in the 300--400 MWe size range.

  8. CFB boiler for Southern Illinois University: Planning and design

    SciTech Connect

    Silvey, M.; Roth, N.; Haake, A.

    1995-12-31

    Southern Illinois University (SIU) is in the process of installing a Babcock and Wilcox (B and W) coal fired circulating fluidized bed (CFB) boiler at its Carbondale, Illinois campus. The CFB boiler will be used for cogeneration. Funding for this project was made possible by the State of Illinois Capital Development Board. Illinois coal will be fired in this CFB boiler. This paper provides a description of the planning process and design of the CFB boiler and related equipment with specific emphasis on particulate removal and recirculation. The startup of this new installation is scheduled for the summer of 1996, with commercial operation by fall of 1996.

  9. Cost and performance of Group 2 boiler NOx controls

    SciTech Connect

    Khan, S.; Maibodi, M.; Srivastava, R.

    1997-12-31

    This paper presents the results of a study conducted to assist EPA in developing the Phase II NO{sub x} rule under Title IV of the Clean Air Act Amendment of 1990 (the Act). The specific purpose of this study was to assess the performance and capital and total levelized costs of NO{sub x} controls pertinent to Group 2 boilers. Group 2 boilers are all coal-fired boilers that are not dry-bottom wall-fired and tangentially fired and include cell burner-fired, cyclone-fired, wet-bottom, vertically fired, stoker-fired, and fluidized-bed boilers.

  10. Looking Northwest at Office Building Boiler Room, Including Cinderblock Walls, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking Northwest at Office Building Boiler Room, Including Cinderblock Walls, Fuel Tank and Scale Weights - Hematite Fuel Fabrication Facility, Office, 3300 State Road P, Festus, Jefferson County, MO

  11. Field Test of Boiler Primary Loop Temperature Controller

    SciTech Connect

    Glanville, P.; Rowley, P.; Schroeder, D.; Brand, L.

    2014-09-01

    Beyond these initial system efficiency upgrades are an emerging class of Advanced Load Monitoring (ALM) aftermarket controllers that dynamically respond to the boiler load, with claims of 10% to 30% of fuel savings over a heating season. For hydronic boilers specifically, these devices perform load monitoring, with continuous measurement of supply and in some cases return water temperatures. Energy savings from these ALM controllers are derived from dynamic management of the boiler differential, where a microprocessor with memory of past boiler cycles prevents the boiler from firing for a period of time, to limit cycling losses and inefficient operation during perceived low load conditions. These differ from OTR controllers, which vary boiler setpoint temperatures with ambient conditions while maintaining a fixed differential. PARR installed and monitored the performance of one type of ALM controller, the M2G from Greffen Systems, at multifamily sites in the city of Chicago and its suburb Cary, IL, both with existing OTR control. Results show that energy savings depend on the degree to which boilers are over-sized for their load, represented by cycling rates. Also savings vary over the heating season with cycling rates, with greater savings observed in shoulder months. Over the monitoring period, over-sized boilers at one site showed reductions in cycling and energy consumption in line with prior laboratory studies, while less over-sized boilers at another site showed muted savings.

  12. Application of Boiler Op for combustion optimization at PEPCO

    SciTech Connect

    Maines, P.; Williams, S.; Levy, E.

    1997-09-01

    Title IV requires the reduction of NOx at all stations within the PEPCO system. To assist PEPCO plant personnel in achieving low heat rates while meeting NOx targets, Lehigh University`s Energy Research Center and PEPCO developed a new combustion optimization software package called Boiler Op. The Boiler Op code contains an expert system, neural networks and an optimization algorithm. The expert system guides the plant engineer through a series of parametric boiler tests, required for the development of a comprehensive boiler database. The data are then analyzed by the neural networks and optimization algorithm to provide results on the boiler control settings which result in the best possible heat rate at a target NOx level or produce minimum NOx. Boiler Op has been used at both Potomac River and Morgantown Stations to help PEPCO engineers optimize combustion. With the use of Boiler Op, Morgantown Station operates under low NOx restrictions and continues to achieve record heat rate values, similar to pre-retrofit conditions. Potomac River Station achieves the regulatory NOx limit through the use of Boiler Op recommended control settings and without NOx burners. Importantly, any software like Boiler Op cannot be used alone. Its application must be in concert with human intelligence to ensure unit safety, reliability and accurate data collection.

  13. EDS coal liquefaction process development, Phase V. Engineering design study of an EDS Illinois bottoms fired hybrid boiler

    SciTech Connect

    1984-04-01

    This interim report documents work carried out by Combustion Engineering, Inc. under a contract to Exxon Research and Engineering Company and was prepared by Combustion Engineering, Inc. This report is the second of two reports by Combustion Engineering, Inc. on the predevelopment phase of the Hybrid Boiler program and covers the results of an engineering design study of a Hybrid Boiler firing the vacuum distillation residue (vacuum bottoms) derived from processing Illinois No. 6 coal in the EDS Coal Liquefaction Process. The function of the Hybrid Boiler is to heat the coal slurry feed for an EDS coal liquefaction plant by a process coil in the convection section and to generate high pressure steam in the radiant section. The Hybrid Boiler design developed in this phase of the program is based on the results of a laboratory characterization program (reported in EDS Interim Report FE-2893-112), on Combustion Engineering, Inc.'s extensive experience as a designer and supplier of steam generating equipment, and on Exxon Research and Engineering Co.'s experience with the design and operation of process heaters.

  14. Instructions on the Design of Boiler Installations SN 350-66.

    DTIC Science & Technology

    1980-05-19

    boiler water treatment, as a rule, must be Frovided fcr fcr following boilers : steam shielded water- tube independent cf their ccefficient of...of saturated steam for boilers with steam superheaters should be accepted: a) for nominal pressure 8-13 Itm(gage) - 1000 pg/kg; b) for nominal pressure...of the niasting cf boilers . 2. Boilers with steam superheaters , as a rule, are equipped by stepped evaporation ant cuisine clclcnes. 3. In boilers

  15. Mining wavelet transformed boiler data sets

    NASA Astrophysics Data System (ADS)

    Letsche, Terry Lee

    Accurate combustion models provide information that allows increased boiler efficiency optimization, saving money and resources while reducing waste. Boiler combustion processes are noted for being complex, nonstationary and nonlinear. While numerous methods have been used to model boiler processes, data driven approaches reflect actual operating conditions within a particular boiler and do not depend on idealized, complex, or expensive empirical models. Boiler and combustion processes vary in time, requiring a denoising technique that preserves the temporal and frequency nature of the data. Moving average, a common technique, smoothes data---low frequency noise is not removed. This dissertation examines models built with wavelet denoising techniques that remove low and high frequency noise in both time and frequency domains. The denoising process has a number of parameters, including choice of wavelet, threshold value, level of wavelet decomposition, and disposition of attributes that appear to be significant at multiple thresholds. A process is developed to experimentally evaluate the predictive accuracy of these models and compares this result against two benchmarks. The first research hypothesis compares the performance of these wavelet denoised models to the model generated from the original data. The second research hypothesis compares the performance of the models generated with this denoising approach to the most effective model generated from a moving average process. In both experiments it was determined that the Daubechies 4 wavelet was a better choice than the more typically chosen Haar wavelet, wavelet packet decomposition outperforms other levels of wavelet decomposition, and discarding all but the lowest threshold repeating attributes produces superior results. The third research hypothesis examined using a two-dimensional wavelet transform on the data. Another parameter for handling the boundary condition was introduced. In the two-dimensional case

  16. Pump apparatus

    SciTech Connect

    Kime, J.A.

    1987-02-17

    This patent describes a gas-oil well production system for pumping formation fluid wherein a down hole pump is provided having a barrel including a barrel fluid inlet, a barrel fluid outlet, a barrel chamber, and a plunger mounted in the barrel chamber having a plunger chamber. The plunger is reciprocally driven between an upper terminal position at the end of the plunger upstroke and a lower terminal position at the end of the plunger downstroke. The method for removing developed gaseous fluids in the formation fluid from the barrel chamber comprises: drawing formation fluid into the barrel chamber during the plunger upstroke; providing gas port means in the barrel; expelling the developed gaseous fluids from the barrel chamber through the gas port means during the occurrence of that portion of the plunger downstroke from the upper terminal position of the gas port means; and substantially blocking the gas port means and moving formation fluid into the plunger chamber during the occurrence of that portion of the plunger downstroke from below the gas port means to the lower terminal position.

  17. CO.sub.2 optically pumped distributed feedback diode laser

    DOEpatents

    Rockwood, Stephen D.

    1980-01-01

    A diode laser optically pumped by a CO.sub.2 coherent source. Interference fringes generated by feeding the optical pumping beam against a second beam, periodically alter the reflectivity of the diode medium allowing frequency variation of the output signal by varying the impingent angle of the CO.sub.2 laser beams.

  18. Calculation and optimization of parameters in low-flow pumps

    NASA Astrophysics Data System (ADS)

    Kraeva, E. M.; Masich, I. S.

    2016-04-01

    The materials on balance tests of high-speed centrifugal pumps with low flow rate are presented. On the bases of analysis and research synthesis, we demonstrate the rational use of impellers of semi-open and open types providing high values for energy parameters of feed system of low-flow pumps.

  19. Pulsatile fluidic pump demonstration and predictive model application

    SciTech Connect

    Morgan, J.G.; Holland, W.D.

    1986-04-01

    Pulsatile fluidic pumps were developed as a remotely controlled method of transferring or mixing feed solutions. A test in the Integrated Equipment Test facility demonstrated the performance of a critically safe geometry pump suitable for use in a 0.1-ton/d heavy metal (HM) fuel reprocessing plant. A predictive model was developed to calculate output flows under a wide range of external system conditions. Predictive and experimental flow rates are compared for both submerged and unsubmerged fluidic pump cases.

  20. Comparion of Mercury Emissions Between Circulating Fluidized Bed Boiler and Pulverized Coal Boiler

    NASA Astrophysics Data System (ADS)

    Wang, Y. J.; Duan, Y. F.; Zhao, C. S.

    Mercury emissions between a circulating fluidized bed (CFB) utility boiler and two pulverized coal (PC) boilers equipped with electrostatic precipitators (ESP) were in situ measured and compared. The standard Ontario Hydro Method (OHM) was used to sample the flue gas before and after the ESP. Various mercury speciations such as Hg0, Hg2+ and Hgp in flue gas and total mercury in fly ashes were analyzed. The results showed that the mercury removal rate of the CFB boiler is nearly 100%; the mercury emission in stack is only 0.028 g/h. However, the mercury removal rates of the two PC boilers are 27.56% and 33.59% respectively, the mercury emissions in stack are 0.80 and 51.78 g/h respectively. It concluded that components of the ESP fly ashes especially their unburnt carbons have remarkable influence on mercury capture. Pore configurations of fine fly ash particles have non-ignored impacts on mercury emissions.

  1. Application of 1-hydroxyethylidene-1, 1-diphosphonic acid in boiler water for industrial boilers.

    PubMed

    Zeng, Bin; Li, Mao-Dong; Zhu, Zhi-Ping; Zhao, Jun-Ming; Zhang, Hui

    2013-01-01

    The primary method used for boiler water treatment is the addition of chemicals to industrial boilers to prevent corrosion and scaling. The static scale inhibition method was used to evaluate the scale inhibition performance of 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP). Autoclave static experiments were used to study the corrosion inhibition properties of the main material for industrial boilers (20# carbon steel) with an HEDP additive in the industrial boiler water medium. The electrochemical behavior of HEDP on carbon steel corrosion control was investigated using electrochemical impedance spectroscopy and Tafel polarization techniques. Experimental results indicate that HEDP can have a good scale inhibition effect when added at a quantity of 5 to 7 mg/L at a test temperature of not more than 100 °C. To achieve a high scale inhibition rate, the HEDP dosage must be increased when the test temperature exceeds 100 °C. Electrochemical and autoclave static experimental results suggest that HEDP has a good corrosion inhibition effect on 20# carbon steel at a concentration of 25 mg/L. HEDP is an excellent water treatment agent.

  2. How to set up and administer an enteral feed via a nasogastric tube.

    PubMed

    Best, Carolyn

    2017-07-05

    Rationale and key points Nasogastric tube feeding is a method of enteral feeding commonly administered by nurses. Feed can be administered either using a volumetric enteral feeding pump (pump feeding) or via an enteral syringe (bolus feeding). This article explains how nurses can safely undertake these two methods of nasogastric tube feed administration at the patient's bedside. » Nasogastric tube feeding can be used to provide some or all of the patient's nutrition, fluid or medication. » Nurses should be equipped with the relevant knowledge to flush a nasogastric tube before the administration of feed or medication; set up and administer an enteral feed via a volumetric enteral feeding pump; and set up and administer a feed using a bolus method. » The position of the distal tip of the nasogastric tube must be confirmed as sitting in the patient's stomach before the tube is used to administer enteral feed, fluid or medication. Reflective activity 'How to' articles can help you update your practice and ensure it remains evidence-based. Apply this article to your practice. Reflect on and write a short account of: 1. How you think this article will change your practice when setting up and administering an enteral feed via a nasogastric tube. 2. How you could use this resource to educate your colleagues about nasogastric tube feeding via an enteral feeding pump or bolus feeding.

  3. LMFBR with booster pump in pumping loop

    DOEpatents

    Rubinstein, H.J.

    1975-10-14

    A loop coolant circulation system is described for a liquid metal fast breeder reactor (LMFBR) utilizing a low head, high specific speed booster pump in the hot leg of the coolant loop with the main pump located in the cold leg of the loop, thereby providing the advantages of operating the main pump in the hot leg with the reliability of cold leg pump operation.

  4. DESIGN REPORT: LOW-NOX BURNERS FOR PACKAGE BOILERS

    EPA Science Inventory

    The report describes a low-NOx burner design, presented for residual-oil-fired industrial boilers and boilers cofiring conventional fuels and nitrated hazardous wastes. The burner offers lower NOx emission levels for these applications than conventional commercial burners. The bu...

  5. 13. VIEW LOOKING NORTHEAST FROM ROOF OF WEST BOILER ROOM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. VIEW LOOKING NORTHEAST FROM ROOF OF WEST BOILER ROOM AT SIROCCO DUST COLLECTOR WHICH FORMED PART OF THE ORIGINAL POLLUTION CONTROL SYSTEM FOR BOILERS 900 AND 901 INSTALLED IN 1926-1928. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

  6. 46 CFR 109.205 - Inspection of boilers and machinery.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ....205 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Tests, Drills, and Inspections § 109.205 Inspection of boilers and machinery. The chief engineer or engineer in charge, before he assumes charge of the boilers and machinery of a unit shall inspect...

  7. Computer control system based on fuzzy control for boilers

    NASA Astrophysics Data System (ADS)

    Zheng, Dezhong; Shang, Liping; Shi, Jinghao

    2000-10-01

    According tp the features of the combustion process of boiler the optimization of combustion is implemented by using fuzzy control principle. The paper states a control strategy implementing different control regulation in different phases (coarse, fine and precision tuning) for enhancing the thermal efficiency of combustion of boiler. The practice shows that the thermal efficiency increased 2.8%.

  8. 11. VIEW OF GAS FIRED BOILERS. Erie City Iron Works, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. VIEW OF GAS FIRED BOILERS. Erie City Iron Works, Model AA60, SN No. 685, size 16, Fuel No. 2 oil or gas, max input 13400. - Juniata Shops, Power Plant & Boiler House, East of Fourth Avenue at Second Street, Altoona, Blair County, PA

  9. 46 CFR 176.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Pressure vessels and boilers. 176.812 Section 176.812... TONS) INSPECTION AND CERTIFICATION Material Inspections § 176.812 Pressure vessels and boilers. (a) Pressure vessels must be tested and inspected in accordance with part 61, subpart 61.10, of this...

  10. 46 CFR 115.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Pressure vessels and boilers. 115.812 Section 115.812 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS CARRYING MORE... CERTIFICATION Material Inspections § 115.812 Pressure vessels and boilers. (a) Pressure vessels must be...

  11. 46 CFR 176.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Pressure vessels and boilers. 176.812 Section 176.812... TONS) INSPECTION AND CERTIFICATION Material Inspections § 176.812 Pressure vessels and boilers. (a) Pressure vessels must be tested and inspected in accordance with part 61, subpart 61.10, of this...

  12. 46 CFR 115.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Pressure vessels and boilers. 115.812 Section 115.812 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS CARRYING MORE... CERTIFICATION Material Inspections § 115.812 Pressure vessels and boilers. (a) Pressure vessels must be...

  13. 46 CFR 176.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Pressure vessels and boilers. 176.812 Section 176.812... TONS) INSPECTION AND CERTIFICATION Material Inspections § 176.812 Pressure vessels and boilers. (a) Pressure vessels must be tested and inspected in accordance with part 61, subpart 61.10, of this...

  14. 46 CFR 176.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Pressure vessels and boilers. 176.812 Section 176.812... TONS) INSPECTION AND CERTIFICATION Material Inspections § 176.812 Pressure vessels and boilers. (a) Pressure vessels must be tested and inspected in accordance with part 61, subpart 61.10, of this...

  15. 46 CFR 115.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Pressure vessels and boilers. 115.812 Section 115.812 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS CARRYING MORE... CERTIFICATION Material Inspections § 115.812 Pressure vessels and boilers. (a) Pressure vessels must be...

  16. 46 CFR 176.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Pressure vessels and boilers. 176.812 Section 176.812... TONS) INSPECTION AND CERTIFICATION Material Inspections § 176.812 Pressure vessels and boilers. (a) Pressure vessels must be tested and inspected in accordance with part 61, subpart 61.10, of this...

  17. 46 CFR 115.812 - Pressure vessels and boilers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Pressure vessels and boilers. 115.812 Section 115.812 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS CARRYING MORE... CERTIFICATION Material Inspections § 115.812 Pressure vessels and boilers. (a) Pressure vessels must be...

  18. 32. INTERIOR BOILER HOUSE Above the two furnaces, one ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    32. INTERIOR - BOILER HOUSE Above the two furnaces, one of the boilers can be seen to the upper left. The large pipes in the foreground are all that remain of the distribution system. Most of the pipe and tubing have been stripped from the room and sold for scrap. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

  19. 46 CFR 61.05-20 - Boiler safety valves.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Boiler safety valves. 61.05-20 Section 61.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING PERIODIC TESTS AND..., superheater, or reheater of a boiler shall be tested at the interval specified by table 61.05-10. ...

  20. 46 CFR 61.05-20 - Boiler safety valves.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Boiler safety valves. 61.05-20 Section 61.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING PERIODIC TESTS AND..., superheater, or reheater of a boiler shall be tested at the interval specified by table 61.05-10. ...

  1. 46 CFR 61.05-20 - Boiler safety valves.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Boiler safety valves. 61.05-20 Section 61.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING PERIODIC TESTS AND..., superheater, or reheater of a boiler shall be tested at the interval specified by table 61.05-10. [CGD 95-028...

  2. 46 CFR 61.05-20 - Boiler safety valves.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Boiler safety valves. 61.05-20 Section 61.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING PERIODIC TESTS AND..., superheater, or reheater of a boiler shall be tested at the interval specified by table 61.05-10. ...

  3. 46 CFR 61.05-20 - Boiler safety valves.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Boiler safety valves. 61.05-20 Section 61.05-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING PERIODIC TESTS AND..., superheater, or reheater of a boiler shall be tested at the interval specified by table 61.05-10. ...

  4. New economic, process conditions stimulate changes in boiler design

    SciTech Connect

    Schwieger, B.

    1981-12-01

    Paper mills are specifying higher steam pressures and temperatures for their recovery boilers, and are paying greater attention to features that improve availability, to counter the increasing costs of energy and downtime, In refineries, sour feedstocks and new catalysts are forcing engineers to rethink CO-boiler design concepts.

  5. 34. TOP O THE BOILER SHOWING CONSTRUCTION DETAILS. NOTE THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    34. TOP O THE BOILER SHOWING CONSTRUCTION DETAILS. NOTE THE 1/2-INCH ROUND IRON REINFORCING ROD AND GALVANIZED FARM FENCING IN THE RIGHT FOREGROUND. AND THE EXPANDED METAL LATH WITH CEMENT COATING IN THE CEILING ABOVE THE BOILER. - Moravian Pottery & Tile Works, Southwest side of State Route 313 (Swamp Road), Northwest of East Court Street, Doylestown, Bucks County, PA

  6. 12. Interior, boiler house, at elev. 55' looking west at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Interior, boiler house, at elev. 55' looking west at retired 300 lb. boilers #11, 10, and 9 with pulverized coal storage hoppers on upper left and rock coal storage bunkers on upper right. - Manchester Street Generating Station, Manchester Street Station, 460 Eddy Street, Providence, Providence County, RI

  7. 10. Interior, Boiler Room, Roundhouse Machine Shop Extension, Southern Pacific ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Interior, Boiler Room, Roundhouse Machine Shop Extension, Southern Pacific Railroad Carlin Shops, view to northwest (90mm lens). The silver stacks suspended from the ceiling in the background mark the former location of the boilers, and served as steam vents. - Southern Pacific Railroad, Carlin Shops, Roundhouse Machine Shop Extension, Foot of Sixth Street, Carlin, Elko County, NV

  8. 10 CFR 431.82 - Definitions concerning commercial packaged boilers.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 3 2010-01-01 2010-01-01 false Definitions concerning commercial packaged boilers. 431.82 Section 431.82 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ENERGY EFFICIENCY PROGRAM FOR CERTAIN... efficiency for a commercial packaged boiler is determined using test procedures prescribed under § 431.86 and...

  9. 38. ELEPHANT BOILERS 1905: Photocopy of April 1905 photograph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    38. ELEPHANT BOILERS - 1905: Photocopy of April 1905 photograph showing elephant boilers along the west wall of the Washington and Mason Street powerhouse and car barn. View looking west on first floor of building. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

  10. 76. General view looking east showing Rust Co. boiler stacks ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    76. General view looking east showing Rust Co. boiler stacks at left, Babcock & Wilcox type boiler stacks at right, Dovel horizontal gas washer in foreground, and No. 1 Furnace in distance. - Sloss-Sheffield Steel & Iron, First Avenue North Viaduct at Thirty-second Street, Birmingham, Jefferson County, AL

  11. DESIGN REPORT: LOW-NOX BURNERS FOR PACKAGE BOILERS

    EPA Science Inventory

    The report describes a low-NOx burner design, presented for residual-oil-fired industrial boilers and boilers cofiring conventional fuels and nitrated hazardous wastes. The burner offers lower NOx emission levels for these applications than conventional commercial burners. The bu...

  12. 10 CFR 431.82 - Definitions concerning commercial packaged boilers.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 10 Energy 3 2011-01-01 2011-01-01 false Definitions concerning commercial packaged boilers. 431.82 Section 431.82 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ENERGY EFFICIENCY PROGRAM FOR CERTAIN... efficiency for a commercial packaged boiler is determined using test procedures prescribed under § 431.86 and...

  13. 49 CFR 230.30 - Lap-joint seam boilers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Lap-joint seam boilers. 230.30 Section 230.30 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances...

  14. 49 CFR 230.30 - Lap-joint seam boilers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Lap-joint seam boilers. 230.30 Section 230.30 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances...

  15. Winding for linear pump

    DOEpatents

    Kliman, G.B.; Brynsvold, G.V.; Jahns, T.M.

    1989-08-22

    A winding and method of winding for a submersible linear pump for pumping liquid sodium are disclosed. The pump includes a stator having a central cylindrical duct preferably vertically aligned. The central vertical duct is surrounded by a system of coils in slots. These slots are interleaved with magnetic flux conducting elements, these magnetic flux conducting elements forming a continuous magnetic field conduction path along the stator. The central duct has placed therein a cylindrical magnetic conducting core, this core having a cylindrical diameter less than the diameter of the cylindrical duct. The core once placed to the duct defines a cylindrical interstitial pumping volume of the pump. This cylindrical interstitial pumping volume preferably defines an inlet at the bottom of the pump, and an outlet at the top of the pump. Pump operation occurs by static windings in the outer stator sequentially conveying toroidal fields from the pump inlet at the bottom of the pump to the pump outlet at the top of the pump. The winding apparatus and method of winding disclosed uses multiple slots per pole per phase with parallel winding legs on each phase equal to or less than the number of slots per pole per phase. The slot sequence per pole per phase is chosen to equalize the variations in flux density of the pump sodium as it passes into the pump at the pump inlet with little or no flux and acquires magnetic flux in passage through the pump to the pump outlet. 4 figs.

  16. Winding for linear pump

    DOEpatents

    Kliman, Gerald B.; Brynsvold, Glen V.; Jahns, Thomas M.

    1989-01-01

    A winding and method of winding for a submersible linear pump for pumping liquid sodium is disclosed. The pump includes a stator having a central cylindrical duct preferably vertically aligned. The central vertical duct is surrounded by a system of coils in slots. These slots are interleaved with magnetic flux conducting elements, these magnetic flux conducting elements forming a continuous magnetic field conduction path along the stator. The central duct has placed therein a cylindrical magnetic conducting core, this core having a cylindrical diameter less than the diameter of the cylindrical duct. The core once placed to the duct defines a cylindrical interstitial pumping volume of the pump. This cylindrical interstitial pumping volume preferably defines an inlet at the bottom of the pump, and an outlet at the top of the pump. Pump operation occurs by static windings in the outer stator sequentially conveying toroidal fields from the pump inlet at the bottom of the pump to the pump outlet at the top of the pump. The winding apparatus and method of winding disclosed uses multiple slots per pole per phase with parallel winding legs on each phase equal to or less than the number of slots per pole per phase. The slot sequence per pole per phase is chosen to equalize the variations in flux density of the pump sodium as it passes into the pump at the pump inlet with little or no flux and acquires magnetic flux in passage through the pump to the pump outlet.

  17. Liquid metal pump

    DOEpatents

    Pennell, William E.

    1982-01-01

    The liquid metal pump comprises floating seal rings and attachment of the pump diffuser to the pump bowl for isolating structural deflections from the pump shaft bearings. The seal rings also eliminate precision machining on large assemblies by eliminating the need for a close tolerance fit between the mounting surfaces of the pump and the seals. The liquid metal pump also comprises a shaft support structure that is isolated from the pump housing for better preservation of alignment of shaft bearings. The shaft support structure also allows for complete removal of pump internals for inspection and repair.

  18. Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers

    SciTech Connect

    Adams, Bradley; Davis, Kevin; Senior, Constance; Shim, Hong Shim; Otten, Brydger Van; Fry, Andrew; Wendt, Jost; Eddings, Eric; Paschedag, Alan; Shaddix, Christopher; Cox, William; Tree, Dale

    2013-09-30

    Reaction Engineering International (REI) managed a team of experts from University of Utah, Siemens Energy, Praxair, Vattenfall AB, Sandia National Laboratories, Brigham Young University (BYU) and Corrosion Management Ltd. to perform multi-scale experiments, coupled with mechanism development, process modeling and CFD modeling, for both applied and fundamental investigations. The primary objective of this program was to acquire data and develop tools to characterize and predict impacts of CO{sub 2} flue gas recycle and burner feed design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) inherent in the retrofit of existing coal-fired boilers for oxy-coal combustion. Experimental work was conducted at Sandia National Laboratories’ Entrained Flow Reactor, the University of Utah Industrial Combustion Research Facility, and Brigham Young University. Process modeling and computational fluid dynamics (CFD) modeling was performed at REI. Successful completion of the project objectives resulted in the following key deliverables: 1) Multi-scale test data from 0.1 kW bench-scale, 100 kW and 200 kW laboratory-scale, and 1 MW semi-industrial scale combustors that describe differences in flame characteristics, fouling, slagging and corrosion for coal combustion under air-firing and oxygen-firing conditions, including sensitivity to oxy-burner design and flue gas recycle composition. 2) Validated mechanisms developed from test data that describe fouling, slagging, waterwall corrosion, heat transfer, char burnout and sooting under coal oxy-combustion conditions. The mechanisms were presented in a form suitable for inclusion in CFD models or process models. 3) Principles to guide design of pilot-scale and full-scale coal oxy-firing systems and flue gas recycle configurations, such that boiler operational impacts from oxy-combustion retrofits are minimized. 4

  19. Evaluation and testing of metering pumps for high-level nuclear waste slurries

    SciTech Connect

    Peterson, M.E.; Perez, J.M. Jr.; Blair, H.T.

    1986-06-01

    The metering pump system that delivers high-level liquid wastes (HLLW) slurry to a melter is an integral subsystem of the vitrification process. The process of selecting a pump for this application began with a technical review of pumps typically used for slurry applications. The design and operating characteristics of numerous pumps were evaluated against established criteria. Two pumps, an air-displacement slurry (ADS) pump and an air-lift pump, were selected for further development. In the development activity, from FY 1983 to FY 1985, the two pumps were subjected to long-term tests using simulated melter feed slurries to evaluate the pumps' performances. Throughout this period, the designs of both pumps were modified to better adapt them for this application. Final reference designs were developed for both the air-displacement slurry pump and the air-lift pump. Successful operation of the final reference designs has demonstrated the feasibility of both pumps. A fully remote design of the ADS pump has been developed and is currently undergoing testing at the West Valley Demonstration Project. Five designs of the ADS pump were tested and evaluated. The initial four designs proved the operating concept of the ADS pump. Weaknesses in the ADS pump system were identified and eliminated in later designs. A full-scale air-lift pump was designed and tested as a final demonstration of the air-lift pump's capabilities.

  20. Ion pump provides increased vacuum pumping speed

    NASA Technical Reports Server (NTRS)

    1965-01-01

    Multiple-cell ion pumps with increased vacuum pumping speed are used for producing ultrahigh vacuums in vacuum tubes and mass spectrometers. The pump has eight cathode-anode magnetron cells arranged in a cylinder which increase the surface area of the cathode.