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Reducing pollutant emissions from a spreader-stoker-fired furnace by stoichiometric control

Patent ·
OSTI ID:5656632
; ;
A method is described for reducing pollutant emissions in a spreader-stoker-fired furnace, the method comprising the steps of: obtaining particles of a combustible material; introducing the particles of combustible material into a spreader-stoker-fired furnace by a spreading means, the spreader-stoker-fired furnace having a bed region at the bottom thereof, an under-spreader region between the bed region and the spreading means, and an over-spreader region above the spreading means; combusting the particles of combustible material within the spreader-stoker-fired furnace in the presence of oxygen; and controlling the amount of oxygen flowing into the spreader-stoker-fired furnace such that the stoichiometric ratio of oxygen to combustible material is within the range of from about 0.6 to about 0.8 in the bed region of the spreader-stoker-fired furnace, is within the range of from about 0.9 to about 1.1 in the under-spreader region of the spreader-fired furnace, and is within the range of from about 0.75 to about 0.95 in the over-spreader region of the spreader-stoker-fired furnace.
Assignee:
Environmental Protection Agency, Washington, DC
Patent Number(s):
US 4592289
OSTI ID:
5656632
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
COMBUSTION CONTROL
CONTROL
ELEMENTS
EMISSION
FLUE GAS
FLUID FLOW
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FURNACES
GAS FLOW
GASEOUS WASTES
NONMETALS
OXYGEN
PARTICLES
POLLUTANTS
POLLUTION ABATEMENT
STOICHIOMETRY
STOKERS
WASTES