Method of operating a two-stage coal gasifier

Details Method of operating a two-stage coal gasifier Method of operating a two-stage coal gasifier

C - Chemistry, Metallurgy

10

J

48/28, 48/37

C10J 3/46 (2006.01) C10J 3/54 (2006.01)

Patent

CA 1163443

- 8 - METHOD OF OPERATING A TWO-STAGE COAL GASIFIER ABSTRACT OF THE DISCLOSURE A method of operating an entrained flow coal gasifier (10) via a two-stage gasification process. A portion of the coal (18) to be gasified is combusted in a combustion zone (30) with near stoichiometric air to generate combustion products. The combustion products are conveyed from the combustion zone into a reduction zone (32) wherein additional coal is injected into the combustion products to react with the combustion products to form a combustible gas. The additional coal is injected into the reduction zone as a mixture (60) consisting of coal and steam, preferably with a coal- to-steam weight ratio of approximately ten to one.

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