Circulating fluidized bed repowering to reduce Sox and Nox emiss

Details Circulating fluidized bed repowering to reduce Sox and Nox emiss Circulating fluidized bed repowering to reduce Sox and Nox emiss

1994-08-25

1996-07-16

Kamen, Noah P.

Furnaces

Process

Treating fuel constituent or combustion product

60645, 110245, 122 40, F23J 1100

Patent

active

055356877

ABSTRACT:
Repowering industrial and utility boilers with a circulating fluidized bed combustor to reduce SOx and NOx emissions emanating from the boilers by the following steps.
First combusting high sulfur-containing carbonaceous solid fuel in a circulating fluidized bed combustor in admixture with limestone and air.
Secondly combusting a carbonaceous fuel in an industrial or utility boiler.
Thirdly mixing the flue gases generated in the circulating fluidized bed combustor with the exhaust gases produced in the industrial or utility boiler.
Finally controlling the total heat generation by maintaining the circulating fluidized bed heat input to the boiler furnace from about 70 to 90% and the heat input of the boiler furnace from about 30 to 10%.

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