Reduction of nitrogen oxide blow-out on Kansko-Achinsk coal combustion
Measurements made of the Krasnoyarsk energy systems showed that nitrogen oxide concentration on combustion of Kansko-Achinsk basin coal in solid-bottom furnaces is slightly less than in boilers of the same capacity during combustion of Ekibastuz, Donbas, and Juznetsk coal. Special studies were conducted to clarify a possible reduction in nitrogen oxide blow-out. It is concluded that recirculation of 15% of flue gases through the burners does not affect significantly the nitrogen oxide blow-out level on Kansko-Achinsk combination coal in a solid-bottom furnace (with a maximum temperature range in the combustion core of 1300 to 1400/sup 0/C); the nitrogen content in initial fuel and the excess air ratio in the operating burners are the main factors determining nitrogen oxide concentration in flue gases; and nonstoichiometric combustion of coal consisting in reduction in the excess air ratio to the lower burner stage with corresponding increase in the excess air ratio to the upper stage, makes it possible to reduce the nitrogen oxide blow-out by 15% approximately.
- OSTI ID:
- 5647302
- Journal Information:
- Sov. Power Eng. (Engl. Transl.); (United States), Vol. 8:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
COAL
COMBUSTION PRODUCTS
FLUE GAS
DENITRIFICATION
NITROGEN OXIDES
AIR POLLUTION ABATEMENT
BOILERS
BURNERS
COMBUSTION
FOSSIL-FUEL POWER PLANTS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASEOUS WASTES
NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POWER PLANTS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
014000 - Coal
Lignite
& Peat- Combustion