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Title: Gas reburning in tangentially-fired, wall-fired and cyclone-fired boilers

Abstract

Gas Reburning has been successfully demonstrated for over 4,428 hours on three coal fired utility boilers as of March 31, 1994. Typically, NO{sub x} reductions have been above 60% in long-term, load-following operation. The thermal performance of the boilers has been virtually unaffected by Gas Reburning. At Illinois Power`s Hennepin Station, Gas Reburning in a 71 MWe tangentially-fired boiler achieved an average NO{sub x} reduction of 67% from the original baseline NO{sub x} level of 0.75 lb NO{sub x}/10{sup 6} Btu over a one year period. The nominal natural gas input was 18% of total heat input. Even at 10% gas heat input, NO{sub x} reduction of 55% was achieved. At Public Service Company of Colorado`s Cherokee Station, a Gas Reburning-Low NO{sub x} Burner system on a 172 MWe wall-fired boiler has achieved overall NO{sub x} reductions of 60--73% in parametric and long-term testing, based on the original baseline NO{sub x} level of 0.73 lb/10{sup 6} Btu. NO{sub x} reduction is as high as 60--65% even at relatively low natural gas usage (5--10% of total heat input). The NO{sub x} reduction by Low NO{sub x} Burners alone is typically 30--40%. NO{sub x} reduction has been found to be insensitive tomore » changes in recirculated flue gas (2--7% of total flue gas) injected with natural gas. At City Water, Light and Power Company`s Lakeside Station in Springfield, Illinois, Gas Reburning in a 33 MWe cyclone-fired boiler has achieved an average NO{sub x} reduction of 66% (range 52--77%) at gas heat inputs of 20--26% in long-term testing, based on a baseline NO{sub x} level of 1.0 lb/10{sup 6} Btu (430 mg/MJ). This paper presents a summary of the operating experience at each site and discusses the long term impacts of applying this technology to units with tangential, cyclone and wall-fired (with Low NO{sub x} Burner) configurations.« less

Authors:
 [1];  [2];  [3]
  1. Illinois Power Co., Decatur, IL (United States)
  2. Public Service Co. of Colorado, Denver, CO (United States)
  3. City Water Light and Power, Springfield, IL (United States); and others
Publication Date:
OSTI Identifier:
72864
Report Number(s):
CONF-941007-
TRN: IM9530%%356
Resource Type:
Book
Resource Relation:
Conference: 1994 international joint power generation conference, Phoenix, AZ (United States), 2-6 Oct 1994; Other Information: PBD: 1994; Related Information: Is Part Of Combustion modeling, scaling and air toxins; Gupta, A.K.; Moussa, A.; Presser, C.; Rini, M.J.; Weber, R.; Woodward, G. [eds.]; PB: 237 p.
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 01 COAL, LIGNITE, AND PEAT; 03 NATURAL GAS; FOSSIL-FUEL POWER PLANTS; AIR POLLUTION ABATEMENT; NITROGEN OXIDES; COMBUSTION PRODUCTS; COCOMBUSTION; NATURAL GAS; COAL; THERMAL EFFICIENCY; HEAT RATE; FIELD TESTS; BURNERS; RETROFITTING; US CLEAN COAL TECHNOLOGY PROGRAM; CARBON MONOXIDE; SULFUR DIOXIDE; CARBON DIOXIDE; OPACITY; BOILERS; DESIGN; EXPERIMENTAL DATA

Citation Formats

May, T J, Rindahl, E G, and Booker, T. Gas reburning in tangentially-fired, wall-fired and cyclone-fired boilers. United States: N. p., 1994. Web.
May, T J, Rindahl, E G, & Booker, T. Gas reburning in tangentially-fired, wall-fired and cyclone-fired boilers. United States.
May, T J, Rindahl, E G, and Booker, T. Sat . "Gas reburning in tangentially-fired, wall-fired and cyclone-fired boilers". United States.
@article{osti_72864,
title = {Gas reburning in tangentially-fired, wall-fired and cyclone-fired boilers},
author = {May, T J and Rindahl, E G and Booker, T},
abstractNote = {Gas Reburning has been successfully demonstrated for over 4,428 hours on three coal fired utility boilers as of March 31, 1994. Typically, NO{sub x} reductions have been above 60% in long-term, load-following operation. The thermal performance of the boilers has been virtually unaffected by Gas Reburning. At Illinois Power`s Hennepin Station, Gas Reburning in a 71 MWe tangentially-fired boiler achieved an average NO{sub x} reduction of 67% from the original baseline NO{sub x} level of 0.75 lb NO{sub x}/10{sup 6} Btu over a one year period. The nominal natural gas input was 18% of total heat input. Even at 10% gas heat input, NO{sub x} reduction of 55% was achieved. At Public Service Company of Colorado`s Cherokee Station, a Gas Reburning-Low NO{sub x} Burner system on a 172 MWe wall-fired boiler has achieved overall NO{sub x} reductions of 60--73% in parametric and long-term testing, based on the original baseline NO{sub x} level of 0.73 lb/10{sup 6} Btu. NO{sub x} reduction is as high as 60--65% even at relatively low natural gas usage (5--10% of total heat input). The NO{sub x} reduction by Low NO{sub x} Burners alone is typically 30--40%. NO{sub x} reduction has been found to be insensitive to changes in recirculated flue gas (2--7% of total flue gas) injected with natural gas. At City Water, Light and Power Company`s Lakeside Station in Springfield, Illinois, Gas Reburning in a 33 MWe cyclone-fired boiler has achieved an average NO{sub x} reduction of 66% (range 52--77%) at gas heat inputs of 20--26% in long-term testing, based on a baseline NO{sub x} level of 1.0 lb/10{sup 6} Btu (430 mg/MJ). This paper presents a summary of the operating experience at each site and discusses the long term impacts of applying this technology to units with tangential, cyclone and wall-fired (with Low NO{sub x} Burner) configurations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}

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