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Results from combustion of Ekibastuzskii coal and Chelyabinskii brown coal mixture at Troitskaya hydropower plant PK-14-2 boilers
09 Combustion
(burners, combustion
systems)
02/00545 Expert system for operational control. Acorde project for coal boilers Gimenez, A. Ing. Quim. (Madrid), 2000, 32, (366), 151-159. (In Spanish) The development of a knowledge-based diagnostic model is presented for operating conditions of large coal boilers for control of the thermal efficiency and NO, emissions.
Liberalization of energy markets makes impact on necessity of Polish power plant modernization in the future. A design criteria, flow performance and right materials significance of the supercritical oncethrough steam boilers has been broadly analysed. The process parameters, design and technological factors were calculated and the basic geometry dimensions of two series of once-through boilers (i.e. hard coal and lignite fuelled ones) has been given.
02/00546 Highly efficient technology for coal boiler Hara, M. et al. Sekitan Rip Gijutsu Kaigi Koenshu, 1999, 9, 69-83. (In Japanese) By adding a coal gasifier and a gas turbine to an existing coal boiler, the exhaust gas from the gas turbine can be reburned with char from the gasifier for repowering purpose. In order to realize the above goal, combustion properties of gasifier char in boilers are studied. Other energy recovery systems, such as utilizing gas turbine exhaust gas for preheating of water or air, as well as energy storage via DME fuel production, etc., are also discussed.
02/00552 The current state of boiler tube failures in fossil plants Dooley, B., Chang, P.S. PowerPlant Chem., 2000, 2, (4), 197-203, 225. A review, with 23 references, covers the boiler pipe failure in fossil fuel firing power plants, including boiler pipe failure demographics; boiler pipe failure mechanics (corrosion fatigue, fly ash erosion, water-wall fireside corrosion, superheater/reheater long-term overheating or fire side corrosion in coal-fired units); and importance of water cycle chemistry in boiler pipe failure prevention.
02iOO547 Modernization of an OP-140 boiler Kucharski, I., Szpak, M. Energetyka, 2000, 54, (2), 43-47. (In Polish) Modernization of the high pressure section of the boiler was necessary in order to increase its capacity from 120 to 145 t/h steam as well as replacement of pulverized coal burners. 02/00548 Pilot-scale air toxics R&D assessment of creosote-treated and PCP-treated wood cofiring for pulverized coal utility boiler applications Freeman, M.C. et al. Biomass and Bioenergy, 2000, 19, (6), 447-456. This paper presents air toxics emissions test results from a pilot-scale cofiring study of pentachlorophenol(PCP) and creosote-treated woods to provide data for pre-premitting requirements for utilities interested in biomass cofiring as a means of increasing renewable energy while reducing greenhouse gases and other emissions for pulverized coal-fired utility boilers. These PCP/creosote-treated wood cofiring tests included a comprehensive assessment of air toxics, including dioxins, furans, polycyclic aromatic hydrocarbons (PAHs), heavy metals (Hg, S, As, Cd, Cr, Co, Pb, Ni and Se), formaldehyde and other volatile organic compounds, HCI, and particulates. This pilotscale testing measured ‘uncontrolled’ emissions from the combustor (upstream) of fuel gas cleanup devices) and showed that PCP/creosotetreated wood could be successfully cofired at 10% heat input without increases in air toxic emissions as compared to a baseline eastern bituminous coal. Air toxics emissions were typically very low, and often near or below detection limits, largely as a result of the good air/fuel mixing and high furnace temperatures associated with pulverized coal combustion. One expected result was an increase in uncontrolled HCI emissions as a result of the higher chlorine content in the treated woods, although even at 10% cofiring levels, HCI emissions were within the range of other US coals. This paper is presented to provide independent data that industry, environmental groups, and regulators may consider in evaluating the opportunities for treated wood cofiring test burns and commercialization in full-scale coal-fired boilers in an environmentally acceptable manner. 02/00549 Replacement of bituminous coal by anthracite for a 75 t/h pf-boiler using a bluff-body with a stable burner cavity Chen, G. et al. Huazhong Ligong Daxue Xuebao, 2000, 28, (1). 3840. (In Chinese) The bluff-body with a cavity has been introduced. The configuration and stable combustion principle of the burner are also described to replace bituminous by anthracite for a 75t/h pf-boiler, a new type of burner. The alteration result shows that the boiler combustion is of very good stability and its combustion efficiency is higher. 02/00550 Results from combustion of Ekibasturskii coal and Chelyabinskii brown coal mixture at Troitskaya hydropower plant PK-14-2 boilers Mansurov, V.I. et al. Elektr. Sm., 1999, 12, 2-6. (In Russian) The preparation and combustion are studied of Ekibastuzskii coal and Chelyabinskii brown coal mixture in boilers equipped with dust system that consists of hammer mill and air dryer. During the use of mixture containing 24-47% Chelyabinskii brown coal, the reliability of operation of thermal-transportation and boiler-furnace systems is satisfactory and there are no problems in the flow of the coal along the channel, no fire and explosion hazard of dust, and no slagging of the boiler. 02/00551 Supercritical-parameter boilers for Polish power plants Rataj, Z.L. et al. Energerykn, 1999, 53, (12), 31-44. (In Polish) 56
Fuel and Energy Abstracts
January 2002
02/00553 The effect of blending coals on electrostatic precipitator performance Wheland. B. et al. Preor. Swn~. - Am. Chem. Sot.. Div. Fuel Chem.. 2000, 45,‘(l), 24-27. ’ ’ ‘ Tarong Power Station, in southern Queensland, Australia, operates 4 x 350 MWe coal-fired boilers. The boilers fire the local Meandu Coal from the isolated Tarong Basin. This coal contains 0.3 percent sulphur and 27 percent ash. This ash is 71 percent SiOz, 27.5 percent A1209, and 1.9 percent TiOz, with small amounts of other components. This coal has poor precipitation performance. With water injection, these plants emit 470 mg/Nm3 of particulate matter. Recent power plant trials blending Meandu with Jeebropilly coal from the Morton Basin (near Ipswich) and Wilke Creek Coal from the Surat Basin (near Dalby) with Menandu Coal have reduced the emissions to near 100 mg/ Nm3. The objective of this study was to identify the causes of the improved precipitator performance when Meandu Coal was blended with other coals and to determine the properties of other coals that would improve the precipitator performance. We gathered emission data from the power plant trials, measured particle size, and analysed the fly ash for chemical composition, and electric resistivity. We calculated drift velocities that confirm that Meandu fly ash is difficult, but Jeebropilly and Wilke Creek are easier to collect. We attributed the small difference between calculated and measured efficiency to the effect of ash resistivity. For the conditions studied, the difference in efficiencies did not primarily depend on particle size or sulphur concentration, but were related to the concentrations of alkali and alkaline earth metal in the fly ash. 02/00554 The role of the global system design in the abatement of NO, in a boiler Lazzeri, L. et al. Proc. Am. Power Conf., 2000, 62, 66-71. Problems encountered during a series of operations to reduce NO, emission problems in existing utility boilers while maintaining good operation conditions are discussed. Topics covered include: over-fire air ports and gas mixing; low NO, burners; combined approach reburning (tangential burners, wall-fired boilers); and additional considerations (oil atomization, coal micronization).
09
COMBUSTION Burners, combustion systems
02/00555 A parametric investigation on pulverized biomass combustion Gurgel Veras, C.A. et al. Proc. Renewable Adv. Energy Syst. 2lst Cenrury, 1999, 109-117. Edited by Hogan, R. The compromise to reduce CO2 emissions in the near future will be possible only if the use of fossil fuels is substantially reduced. Pulverized biomass combustion is an interesting option due to the relative facility in which the actual combustors may be adapted to burn such feedstock. However, the knowledge of the biomass particle’s behaviour in pulverized flames is lacking of more detailed study. This paper intends to clarify many processes that take place in the boundary layer of a single biomass particle burning in different conditions. The parametric study, thus presents the influence of particle size, oxygen content and gas temperature of the bulk as well as of some physical properties on the reactivity and fuel NO conversion in the combustion of biomass.
(burners, combustion
systems)
02/00545 Expert system for operational control. Acorde project for coal boilers Gimenez, A. Ing. Quim. (Madrid), 2000, 32, (366), 151-159. (In Spanish) The development of a knowledge-based diagnostic model is presented for operating conditions of large coal boilers for control of the thermal efficiency and NO, emissions.
Liberalization of energy markets makes impact on necessity of Polish power plant modernization in the future. A design criteria, flow performance and right materials significance of the supercritical oncethrough steam boilers has been broadly analysed. The process parameters, design and technological factors were calculated and the basic geometry dimensions of two series of once-through boilers (i.e. hard coal and lignite fuelled ones) has been given.
02/00546 Highly efficient technology for coal boiler Hara, M. et al. Sekitan Rip Gijutsu Kaigi Koenshu, 1999, 9, 69-83. (In Japanese) By adding a coal gasifier and a gas turbine to an existing coal boiler, the exhaust gas from the gas turbine can be reburned with char from the gasifier for repowering purpose. In order to realize the above goal, combustion properties of gasifier char in boilers are studied. Other energy recovery systems, such as utilizing gas turbine exhaust gas for preheating of water or air, as well as energy storage via DME fuel production, etc., are also discussed.
02/00552 The current state of boiler tube failures in fossil plants Dooley, B., Chang, P.S. PowerPlant Chem., 2000, 2, (4), 197-203, 225. A review, with 23 references, covers the boiler pipe failure in fossil fuel firing power plants, including boiler pipe failure demographics; boiler pipe failure mechanics (corrosion fatigue, fly ash erosion, water-wall fireside corrosion, superheater/reheater long-term overheating or fire side corrosion in coal-fired units); and importance of water cycle chemistry in boiler pipe failure prevention.
02iOO547 Modernization of an OP-140 boiler Kucharski, I., Szpak, M. Energetyka, 2000, 54, (2), 43-47. (In Polish) Modernization of the high pressure section of the boiler was necessary in order to increase its capacity from 120 to 145 t/h steam as well as replacement of pulverized coal burners. 02/00548 Pilot-scale air toxics R&D assessment of creosote-treated and PCP-treated wood cofiring for pulverized coal utility boiler applications Freeman, M.C. et al. Biomass and Bioenergy, 2000, 19, (6), 447-456. This paper presents air toxics emissions test results from a pilot-scale cofiring study of pentachlorophenol(PCP) and creosote-treated woods to provide data for pre-premitting requirements for utilities interested in biomass cofiring as a means of increasing renewable energy while reducing greenhouse gases and other emissions for pulverized coal-fired utility boilers. These PCP/creosote-treated wood cofiring tests included a comprehensive assessment of air toxics, including dioxins, furans, polycyclic aromatic hydrocarbons (PAHs), heavy metals (Hg, S, As, Cd, Cr, Co, Pb, Ni and Se), formaldehyde and other volatile organic compounds, HCI, and particulates. This pilotscale testing measured ‘uncontrolled’ emissions from the combustor (upstream) of fuel gas cleanup devices) and showed that PCP/creosotetreated wood could be successfully cofired at 10% heat input without increases in air toxic emissions as compared to a baseline eastern bituminous coal. Air toxics emissions were typically very low, and often near or below detection limits, largely as a result of the good air/fuel mixing and high furnace temperatures associated with pulverized coal combustion. One expected result was an increase in uncontrolled HCI emissions as a result of the higher chlorine content in the treated woods, although even at 10% cofiring levels, HCI emissions were within the range of other US coals. This paper is presented to provide independent data that industry, environmental groups, and regulators may consider in evaluating the opportunities for treated wood cofiring test burns and commercialization in full-scale coal-fired boilers in an environmentally acceptable manner. 02/00549 Replacement of bituminous coal by anthracite for a 75 t/h pf-boiler using a bluff-body with a stable burner cavity Chen, G. et al. Huazhong Ligong Daxue Xuebao, 2000, 28, (1). 3840. (In Chinese) The bluff-body with a cavity has been introduced. The configuration and stable combustion principle of the burner are also described to replace bituminous by anthracite for a 75t/h pf-boiler, a new type of burner. The alteration result shows that the boiler combustion is of very good stability and its combustion efficiency is higher. 02/00550 Results from combustion of Ekibasturskii coal and Chelyabinskii brown coal mixture at Troitskaya hydropower plant PK-14-2 boilers Mansurov, V.I. et al. Elektr. Sm., 1999, 12, 2-6. (In Russian) The preparation and combustion are studied of Ekibastuzskii coal and Chelyabinskii brown coal mixture in boilers equipped with dust system that consists of hammer mill and air dryer. During the use of mixture containing 24-47% Chelyabinskii brown coal, the reliability of operation of thermal-transportation and boiler-furnace systems is satisfactory and there are no problems in the flow of the coal along the channel, no fire and explosion hazard of dust, and no slagging of the boiler. 02/00551 Supercritical-parameter boilers for Polish power plants Rataj, Z.L. et al. Energerykn, 1999, 53, (12), 31-44. (In Polish) 56
Fuel and Energy Abstracts
January 2002
02/00553 The effect of blending coals on electrostatic precipitator performance Wheland. B. et al. Preor. Swn~. - Am. Chem. Sot.. Div. Fuel Chem.. 2000, 45,‘(l), 24-27. ’ ’ ‘ Tarong Power Station, in southern Queensland, Australia, operates 4 x 350 MWe coal-fired boilers. The boilers fire the local Meandu Coal from the isolated Tarong Basin. This coal contains 0.3 percent sulphur and 27 percent ash. This ash is 71 percent SiOz, 27.5 percent A1209, and 1.9 percent TiOz, with small amounts of other components. This coal has poor precipitation performance. With water injection, these plants emit 470 mg/Nm3 of particulate matter. Recent power plant trials blending Meandu with Jeebropilly coal from the Morton Basin (near Ipswich) and Wilke Creek Coal from the Surat Basin (near Dalby) with Menandu Coal have reduced the emissions to near 100 mg/ Nm3. The objective of this study was to identify the causes of the improved precipitator performance when Meandu Coal was blended with other coals and to determine the properties of other coals that would improve the precipitator performance. We gathered emission data from the power plant trials, measured particle size, and analysed the fly ash for chemical composition, and electric resistivity. We calculated drift velocities that confirm that Meandu fly ash is difficult, but Jeebropilly and Wilke Creek are easier to collect. We attributed the small difference between calculated and measured efficiency to the effect of ash resistivity. For the conditions studied, the difference in efficiencies did not primarily depend on particle size or sulphur concentration, but were related to the concentrations of alkali and alkaline earth metal in the fly ash. 02/00554 The role of the global system design in the abatement of NO, in a boiler Lazzeri, L. et al. Proc. Am. Power Conf., 2000, 62, 66-71. Problems encountered during a series of operations to reduce NO, emission problems in existing utility boilers while maintaining good operation conditions are discussed. Topics covered include: over-fire air ports and gas mixing; low NO, burners; combined approach reburning (tangential burners, wall-fired boilers); and additional considerations (oil atomization, coal micronization).
09
COMBUSTION Burners, combustion systems
02/00555 A parametric investigation on pulverized biomass combustion Gurgel Veras, C.A. et al. Proc. Renewable Adv. Energy Syst. 2lst Cenrury, 1999, 109-117. Edited by Hogan, R. The compromise to reduce CO2 emissions in the near future will be possible only if the use of fossil fuels is substantially reduced. Pulverized biomass combustion is an interesting option due to the relative facility in which the actual combustors may be adapted to burn such feedstock. However, the knowledge of the biomass particle’s behaviour in pulverized flames is lacking of more detailed study. This paper intends to clarify many processes that take place in the boundary layer of a single biomass particle burning in different conditions. The parametric study, thus presents the influence of particle size, oxygen content and gas temperature of the bulk as well as of some physical properties on the reactivity and fuel NO conversion in the combustion of biomass.