Furnaces – Process – Treating fuel constituent or combustion product
Patent
1999-10-01
2000-11-28
Gravini, Stephen
Furnaces
Process
Treating fuel constituent or combustion product
110346, 110347, 110233, 110238, 110263, 110266, 110264, F23B 700, F23D 102
Patent
active
061520543
ABSTRACT:
A method and system for the use of waste coal fines to reduce nitrogen oxides emissions from a coal-fired cyclone boiler. A coal water slurry including waste coal fines is injected as a co-firing fuel into a cyclone barrel of the cyclone boiler to partially oxidize the coal water slurry in a central portion of the cyclone barrel where injected. This produces a reducing zone having reducing gas species that convert nitrogen oxides to diatomic nitrogen. The coal water slurry can alternatively be injected into the cyclone barrel from a secondary combustion air conduit. The evaporation of the water from the coal water slurry reduces the overall combustion temperature in the cyclone barrel, further reducing the production of nitrogen oxides.
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Ashworth Robert A.
Carson W. Richard
Melick Todd A.
Sommer Todd M.
GE Energy and Environmental Research Corp.
Gravini Stephen
Rinehart Ken B.
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