Indirectly heated fluidized bed gasifier

Details Indirectly heated fluidized bed gasifier Indirectly heated fluidized bed gasifier

1983-01-10

1984-12-25

Bashore, S. Leon

Gas: heating and illuminating

Generators

Cupola

48 63, 48 73, 48 77, 110245, 422142, 422145, 422146, 431 7, 431170, C10J 356, B01J 826

Patent

active

044901577

ABSTRACT:
A fluidized bed gasifier (10) for gasifying a first fuel (50) receives heat indirectly from a combusting fluidized bed (24) disposed at least partially within the gasifier fluidized bed (12). Fuel for the combusting bed (24) may be provided by removing a portion of the fluidized first fuel from the gasifier bed (12) and transporting (30,34) this removed portion into the combusting bed (12). Heat is transferred across the conductive walls of the combustor vessel (26). Product gas heating value is increased by separately removing (28) the products of combustion from the gasifier (10) and by recycling a portion of the product fuel gas (74) as the fluidizing gas (54) for the gasifier fluidized bed (12). A radiation shield (18) is also provided to reduce heat loss from the gasifier bed (12) and to remove elutriated material from the product fuel gas.

REFERENCES:
patent: 2527197 (1950-10-01), Rollman
patent: 3279887 (1966-10-01), Daniell et al.
patent: 3804606 (1974-04-01), Archer et al.
patent: 4103646 (1978-08-01), Yerushalmi et al.
patent: 4115070 (1978-09-01), Jukkola et al.
patent: 4303023 (1981-12-01), Perkins et al.
patent: 4333909 (1982-06-01), Stewart
patent: 4337066 (1982-06-01), Kunii
patent: 4359968 (1982-11-01), Stewart
patent: 4405339 (1983-09-01), Kunii

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