Fluid bed coal gasification

Details Fluid bed coal gasification Fluid bed coal gasification

1974-12-23

1976-07-27

Wolk, Morris O.

Gas: heating and illuminating

Processes

Coal and water

48 73, 48 99, 48206, 48197R, 252373, C10B 104, C10J 354, C10J 356, C10K 108

Patent

active

039716392

ABSTRACT:
A process and apparatus for gasifying coal to produce carbon monoxide and hydrogen in which a first stream of coal is burned without bed formation in a combustion zone in the presence of water under oxidation conditions to produce gases containing carbon dioxide and steam. A second stream of coal is maintained as a fluid bed in a separate gasifier zone by upflowing carbon dioxide and steam from the combustion zone while being gasified under reducing conditions to produce carbon monoxide and hydrogen. Char produced in the fluid bed is elutriated overhead and material in the fluid bed is prevented from direct entry into the combustion zone. The ratio of carbonaceous material to ash in the char removed overhead is lower than the average ratio of carbonaceous material to ash in the solids in the fluid bed.

REFERENCES:
patent: 2662007 (1953-12-01), Dickinson
patent: 2729552 (1956-01-01), Nelson et al.
patent: 2729552 (1956-01-01), Nelson et al.
patent: 2879148 (1959-03-01), Atwell
patent: 3799608 (1974-03-01), Gantt
patent: 3864100 (1975-02-01), Blaskowski

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