Integrated process for gasifying and combusting a carbonaceous f

Details Integrated process for gasifying and combusting a carbonaceous f Integrated process for gasifying and combusting a carbonaceous f

1985-02-22

1986-07-29

Kratz, Peter

Furnaces

Process

Treating fuel constituent or combustion product

48203, 110229, 110345, 110346, 110347, C10J 346, C10J 386, F23B 700

Patent

active

046025731

ABSTRACT:
A first portion (50) of a sulfur and nitrogen-bearing carbonaceous fuel is gasified in a gasification reactor (20) in the presence of a reducing atmosphere of air to produce a hot, char-containing, carbon-monoxide-rich fuel gas (42) having a low Btu content. After cooling, the char-containing carbon-monoxide-rich fuel gas (42) is introduced into a steam generating furnace (10) and combusted therein with a second portion (40) of the carbonaceous fuel in the presence of at least sufficient additional air to substantially complete combustion whereby a hot flue gas is produced. A sulfur-capturing material (60) is introduced into both the gasification reactor (20) and the combustion zone of the steam generating furnace (10) to absorb a substantial portion of the sulfur-containing gases produced during the gasification and combustion processes. By combusting the second portion of the carbonaceous fuel together with the cooled, carbon-monoxide rich, low Btu content fuel gas, nitrogen oxide produced during combustion in the steam-generating furnace (10) is also reduced.

REFERENCES:
patent: 4232615 (1980-11-01), Brown
patent: 4262610 (1981-04-01), Heim et al.
patent: 4285283 (1981-08-01), Lyon et al.
patent: 4407206 (1983-10-01), Bartok et al.
patent: 4411204 (1983-10-01), Hamilton
patent: 4423702 (1981-01-01), Ashworth et al.
patent: 4426939 (1984-01-01), Winship

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