Formation and control of NO emissions from coal-fired spreader-stoker boilers
- Univ. of Utah, Salt Lake City
This paper describes the results of a study on the formation and control of nitrogen oxides in coal-fired spreader-stoker systems. Three scales of experimental equipment were used to define the evolution and oxidation of fuel nitrogen in the fuel suspension phase, the conversion of fuel nitrogen during fixed-bed combustion, and the coupling between the two combustion phases. The results indicate that NO emissions from spreader-stoker-fired coal furnaces are the result of relatively high conversions of fuel nitrogen evolved from particles less than 0.1 inches in the suspension phase and low conversion of fuel nitrogen during the bed combustion. In the suspension phase, nitrogen is evolved at approximately the same rate as carbon is oxidized. Local oxygen availability is the primary control parameter for both phases of the combustion. Minimum overall fuel nitrogen conversions of 6 percent were achieved in the pilot scale facility by controlling the stoichiometry in both combustion zones.
- OSTI ID:
- 5756836
- Report Number(s):
- CONF-820801-
- Journal Information:
- Symp. (Int.) Combust., (Proc.); (United States), Conference: 19. international symposium on combustion, Haifa, Israel, 8 Aug 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
42 ENGINEERING
BOILERS
AIR POLLUTION CONTROL
COAL
COMBUSTION PRODUCTS
NITRIC OXIDE
FURNACES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CONTROL
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
014000* - Coal
Lignite
& Peat- Combustion
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
421000 - Engineering- Combustion Systems