No.sub.x reduction in multisolid fluidized bed combustors

Details No.sub.x reduction in multisolid fluidized bed combustors No.sub.x reduction in multisolid fluidized bed combustors

F - Mech Eng,Light,Heat,Weapons

27

B

158/2, 110/2.1

F27B 15/00 (2006.01) B01D 53/56 (2006.01) B01J 8/32 (2006.01) F23C 10/00 (2006.01) F23C 10/10 (2006.01)

Patent

CA 1156516

NOx REDUCTION IN MULTISOLID FLUIDIZED BED COMBUSTORS Abstract of the Disclosure Nitrogen oxide pollutants are substantially reduced and sulfur dioxide minimized in multisolid fluidized beds by staged combustion of the fuel. The lower combustion region is operated at substoichiometric conditions such that NOx is reduced by carbon and carbon monoxide to nitrogen gas. The upper combustion region is operated at excess oxygen conditions to complete the combustion of char and carbon monoxide. Elevated temperature excursions in the upper region which deter sulfur capture are prevented by recycling cool entrained bed particles therethrough.

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