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US 4,290,780 AGranted
Method for gasifying finely-divided coal in a fixed bed gasifier
AssigneeConoco Inc.
InventorPhilip J. Dudt
Life of this patent
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Abstract
A process for gasifying finely-divided coal in a fixed bed gasifier, the process comprising: charging finely-divided coal to a stirred semi-fluidized carbonizer reaction zone where the coal is contacted with oxygen and agglomerated into coal derived particulate solids of a size suitable as a feedstock to a fixed bed gasifer and thereafter passed to a fixed bed gasifer.
Claims7
A process for gasifying finely-divided coal in a fixed bed gasifier, said process comprising
- (a) charging said finely-divided coal to a stirred semi-fluidized carbonizer reaction zone;
- (b) charging a free oxygen containing gas to said reaction zone in an amount sufficient to maintain a temperature in said reaction zone from about 950.degree. to about 1200.degree. F.;
- (c) charging an inert sweep gas to said reaction zone at a rate sufficient to provide a linear gas velocity in said reaction zone from about 0.1 to about 0.5 feet per second;
- (d) recovering a gaseous stream from said reaction zone;
- (e) recovering a particulate coal derived solids stream, at least a portion of said particulate solids stream being of a size consist greater than about 1/4 inch for use as a feedstock to a fixed bed gasifier from said reaction zone;
- and
- (f) charging at least said portion of said particulate solids stream to a fixed bed gasifier to produce a gaseous stream and an ash stream.
4 more elements
Dependencies are inferred from the claim text.