Coal gasification ash removal system

Details Coal gasification ash removal system Coal gasification ash removal system

1974-04-04

1976-05-18

Bashore, S. Leon

Gas: heating and illuminating

Processes

Fuel mixtures

48202, 48206, 48210, 48DIG4, 201 31, 209138, 209154, C10J 354, B07B 400

Patent

active

039574598

ABSTRACT:
In a fluidized bed process for the gasification of coal or similar carbonaceous solids wherein char particles are withdrawn from a fluidized bed reaction vessel, transported to a second vessel, and later returned to the initial vessel, char particles of high ash content are separated from particles to be returned to the fluidized bed reaction vessel by injecting a dense phase stream of char particles including particles of both high and low ash content into a vertically moving gas stream having a velocity sufficient to transport relatively light particles of low ash content upwardly into the fluidized bed reaction vessel but insufficient to suspend relatively dense particles of high ash content, collecting the high ash content particles which are not entrained by the gas stream, and periodically withdrawing the collected particles from the system.

REFERENCES:
patent: 2623815 (1952-12-01), Roethali et al.
patent: 2623817 (1952-12-01), Lewis
patent: 2741549 (1956-04-01), Russell
patent: 2959284 (1960-11-01), Molstedt
patent: 3322521 (1967-05-01), Cockerham
patent: 3694346 (1972-09-01), Blaser et al.
patent: 3874739 (1975-04-01), Mitchell

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