Nitric oxide destruction in the fuel-bed burning regime of spreader stokers
This article gives results of an experimental study of nitric oxide (NO) destruction in the fuel bed of a coal-fired spreader stoker. NO was injected into the coal bed and freeboard flame zone under varying local stoichiometries to determine the fate of NO in the primary combustion zone. In general, a high capacity for NO reduction was observed, with bed-phase reduction contributing most significantly to the overall mechanism. Fractional survival of injected NO, as well as fuel nitrogen conversion to exhaust NO, decreased with decreasing bed-region stoichiometry. Staged firing also decreased NO survival by increasing residence time in the fuel-rich primary combustion zone. The modest nitrogen oxides (NOx) reductions achievable with Flue Gas Recirculation (FGR), a practical NOx control technique, are due in part to the more than 50% destruction of NO in the recycled flue gases.
- Research Organization:
- Environmental Protection Agency, Research Triangle Park, NC (USA). Air and Energy Engineering Research Lab.
- OSTI ID:
- 7230512
- Report Number(s):
- PB-88-202049/XAB; EPA-600/J-87/344
- Country of Publication:
- United States
- Language:
- English
Similar Records
Formation and control of NO emissions from coal-fired spreader-stoker boilers
Parameters influencing nitrogenous species formation and reaction in stoker coal-fired combustion
Related Subjects
010800* -- Coal
Lignite
& Peat-- Waste Management
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COMBUSTORS
CONTROL
ENERGY SOURCES
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
MATERIALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
STOKERS