Abstract
SNCR (Selective Non-Catalytic Reduction) is a method for reducing the level of nitrogen oxides in flue gas that has attracted a lot of attention and has been put to use in several units, both in Sweden and abroad. The chemical basis for this method is the fact that certain nitrogen compounds with a hydrogen content (ammonia, urea, etc) react with nitrogen oxides, forming elementary nitrogen. The maximum NO{sub x} removal is obtained when the reducing chemical is injected in the flue gas at a point where the temperature is about 870 - 1010 deg C. The measured removal of NO{sub x} using the SNCR system was 30-90%. Most of the observations indicate a NO{sub x} removal of 40-60%. The complete picture shows a somewhat improved removal of NO{sub x} at lower loads, but also higher emission values for ammonia and nitrous oxide. Within the tested temperature span (870-1020 deg C at high load, and 810-910 deg C at low loads) there is no detectable correlation between temperature and removal of NO{sub x}, NH{sub 3}, N{sub 2}O and CO. The dominant factors are stoichiometric ratio and boiler load. The economic evaluation indicates that during 1993, with an average emission reduction of
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Gromulski, J;
Hinderson, A;
Johansson, A;
Sfiris, G;
Sjoeberg, M;
Westermark, M
[1]
- Vattenfall Utveckling AB, Vaellingby (Sweden)
Citation Formats
Gromulski, J, Hinderson, A, Johansson, A, Sfiris, G, Sjoeberg, M, and Westermark, M.
Evaluation of NO{sub x}-reduction with SNCR in a waste-fueled boiler; Utvaerdering av NO{sub x}-reduktion med SNCR i avfallspanna, Sydvaestra Skaanes Avfallsaktiebolag.
Sweden: N. p.,
1994.
Web.
Gromulski, J, Hinderson, A, Johansson, A, Sfiris, G, Sjoeberg, M, & Westermark, M.
Evaluation of NO{sub x}-reduction with SNCR in a waste-fueled boiler; Utvaerdering av NO{sub x}-reduktion med SNCR i avfallspanna, Sydvaestra Skaanes Avfallsaktiebolag.
Sweden.
Gromulski, J, Hinderson, A, Johansson, A, Sfiris, G, Sjoeberg, M, and Westermark, M.
1994.
"Evaluation of NO{sub x}-reduction with SNCR in a waste-fueled boiler; Utvaerdering av NO{sub x}-reduktion med SNCR i avfallspanna, Sydvaestra Skaanes Avfallsaktiebolag."
Sweden.
@misc{etde_50884,
title = {Evaluation of NO{sub x}-reduction with SNCR in a waste-fueled boiler; Utvaerdering av NO{sub x}-reduktion med SNCR i avfallspanna, Sydvaestra Skaanes Avfallsaktiebolag}
author = {Gromulski, J, Hinderson, A, Johansson, A, Sfiris, G, Sjoeberg, M, and Westermark, M}
abstractNote = {SNCR (Selective Non-Catalytic Reduction) is a method for reducing the level of nitrogen oxides in flue gas that has attracted a lot of attention and has been put to use in several units, both in Sweden and abroad. The chemical basis for this method is the fact that certain nitrogen compounds with a hydrogen content (ammonia, urea, etc) react with nitrogen oxides, forming elementary nitrogen. The maximum NO{sub x} removal is obtained when the reducing chemical is injected in the flue gas at a point where the temperature is about 870 - 1010 deg C. The measured removal of NO{sub x} using the SNCR system was 30-90%. Most of the observations indicate a NO{sub x} removal of 40-60%. The complete picture shows a somewhat improved removal of NO{sub x} at lower loads, but also higher emission values for ammonia and nitrous oxide. Within the tested temperature span (870-1020 deg C at high load, and 810-910 deg C at low loads) there is no detectable correlation between temperature and removal of NO{sub x}, NH{sub 3}, N{sub 2}O and CO. The dominant factors are stoichiometric ratio and boiler load. The economic evaluation indicates that during 1993, with an average emission reduction of 56%, the NO{sub x} emission fee is reduced from 12371 kSEK/yr without flue gas treatment to 5458 kSEK. The total operating costs for the SNCR system (capital cost excluded) being 1248 kSEK/yr, this means a net profit of 5665 kSEK/yr. This means the pay-off time will be about 0.7 year. Note that this figure is computed without regard to capital cost. 74 figs, 9 tabs}
place = {Sweden}
year = {1994}
month = {Oct}
}
title = {Evaluation of NO{sub x}-reduction with SNCR in a waste-fueled boiler; Utvaerdering av NO{sub x}-reduktion med SNCR i avfallspanna, Sydvaestra Skaanes Avfallsaktiebolag}
author = {Gromulski, J, Hinderson, A, Johansson, A, Sfiris, G, Sjoeberg, M, and Westermark, M}
abstractNote = {SNCR (Selective Non-Catalytic Reduction) is a method for reducing the level of nitrogen oxides in flue gas that has attracted a lot of attention and has been put to use in several units, both in Sweden and abroad. The chemical basis for this method is the fact that certain nitrogen compounds with a hydrogen content (ammonia, urea, etc) react with nitrogen oxides, forming elementary nitrogen. The maximum NO{sub x} removal is obtained when the reducing chemical is injected in the flue gas at a point where the temperature is about 870 - 1010 deg C. The measured removal of NO{sub x} using the SNCR system was 30-90%. Most of the observations indicate a NO{sub x} removal of 40-60%. The complete picture shows a somewhat improved removal of NO{sub x} at lower loads, but also higher emission values for ammonia and nitrous oxide. Within the tested temperature span (870-1020 deg C at high load, and 810-910 deg C at low loads) there is no detectable correlation between temperature and removal of NO{sub x}, NH{sub 3}, N{sub 2}O and CO. The dominant factors are stoichiometric ratio and boiler load. The economic evaluation indicates that during 1993, with an average emission reduction of 56%, the NO{sub x} emission fee is reduced from 12371 kSEK/yr without flue gas treatment to 5458 kSEK. The total operating costs for the SNCR system (capital cost excluded) being 1248 kSEK/yr, this means a net profit of 5665 kSEK/yr. This means the pay-off time will be about 0.7 year. Note that this figure is computed without regard to capital cost. 74 figs, 9 tabs}
place = {Sweden}
year = {1994}
month = {Oct}
}