04854249 is referenced by 33 patents and cites 17 patents.

A process for combusting sulfur and nitrogen containing carbonaceous materials in a two stage combustion process wherein sulfur and nitrogen containing carbonaceous materials and sulfur fixation agent particulates are introduced into a first combustion stage single fluidized bed having a density/size selective solids withdrawal conduit. The carbonaceous materials are combusted in the fluidized bed under substoichiometric oxygen conditions at temperatures of about 1600.degree. to about 2000.degree. F. producing ash and reducing gases forming a reducing region in a major portion of the single fluidized bed, the reducing gases comprising gaseous sulfur compounds. In a reducing region of the fluidized bed, the gaseous sulfur compounds are reacted with oxides of the sulfur fixation agent forming an intermediate solid metallic sulfur compound and nitrogen contained in the carbonaceous materials is converted to molecular nitrogen. The intermediate sulfur compound is reacted in an oxidizing region maintained at a base portion of the fluidized bed to form a stable, solid, environmentally acceptable sulfur containing compound which is withdrawn through the selective solids withdrawal conduit with agglomerated ash.

Title
Two stage combustion
Application Number
865356
Publication Number
4854249
Application Date
May 19, 1988
Publication Date
August 8, 1989
Inventor
William A Sandstrom
Chicago
IL, US
Jitendra G Patel
Naperville
IL, US
Mark J Khinkis
Morton Grove
IL, US
Agent
Thomas W Speckman
Assignee
Institute of Gas Technology
IL, US
IPC
F23C 11/02
F23B 7/00
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