Fixed bed gasification process

Details Fixed bed gasification process Fixed bed gasification process

1987-06-15

1988-09-27

Richman, Barry S.

Gas: heating and illuminating

Processes

Coal and water

44 16A, 48206, 48210, C10J 302, C10J 308

Patent

active

047739193

ABSTRACT:
Gasification is performed under pressures in the range from 5 bars to 150 bars with oxygen, steam and/or carbon dioxide as gasifying agents. Pellets are fed to the top of a fixed bed in the gasification reactor. The gasifying agents are introduced into the fixed bed from below. Mineral constituents are withdrawn as solid ash or liquid slag from the lower end of the fixed bed. The pellets are made from fine-grained hard coal which has a particle size below 1 mm and contains 3 to 10 wt. % of fines having particle sizes not in excess of 2 micrometers and 70 to 80 wt. % of particles not in excess of a fraction not in excess of 63 micrometers. The fine-grained hard coal is mixed with bentonite to obtain a mixture which contains 1 to 8 wt. % bentonite. With an addition of water, the mixture is shaped to form pellets which contain 15 to 25 wt. % water. The pellets are fed in an undried, moist, plastically deformable state to the top of the fixed bed.

REFERENCES:
patent: 1913121 (1933-06-01), Kern
patent: 2163148 (1939-06-01), Linder
patent: 3540867 (1970-11-01), Baron et al.
patent: 3692505 (1972-09-01), Reichl
patent: 3762886 (1973-10-01), Triska
patent: 4111665 (1978-09-01), Pasternak et al.
patent: 4167398 (1979-09-01), Hughes et al.
patent: 4239500 (1980-12-01), Ratzeburg
patent: 4356004 (1982-10-01), Richter
patent: 4608059 (1986-08-01), Kupfer et al.

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