Gas: heating and illuminating – Processes – Coal
Patent
1987-04-09
1989-02-21
Kratz, Peter
Gas: heating and illuminating
Processes
Coal
48203, 48206, 48DIG2, C10J 346
Patent
active
048061310
ABSTRACT:
This invention relates to a gasification process for a coal gasification furnace in a coal gasification plant and to an apparatus therefor.
In particular, the invention relates to a gasification process for a coal gasification furnace which comprises ejecting coal and an oxidizing agent along the circumferential direction of a gasification chamber to form a whirling stream, making the two contact and react with each other in the gasification chamber, thereby producing a combustible gas from the coal while making ash in the coal melt into the form of slag, and withdrawing the slag through a slag tap provided at the lower part of the gasification chamber into a slag cooling chamber, wherein said process comprises causing the whirling stream to produce pressure difference such that the pressure decreases from the wall surface of the gasification chamber toward the central part thereof, forming, by use of the pressure difference, a recycle system wherein a part of the combustible gas produced is introduced from the gasification chamber to the slag cooling chamber and returned again therefrom to the gasification chamber, and heating the slag tag by means of the circulating combustible gas, and to a process therefor.
REFERENCES:
patent: 1146627 (1915-07-01), Koppers
patent: 2644745 (1953-07-01), Hemminger
patent: 2716598 (1955-08-01), Moses
patent: 2971830 (1961-02-01), Kawai et al.
patent: 4180387 (1979-12-01), Rudolph
patent: 4445441 (1984-05-01), Tanca
patent: 4487612 (1984-12-01), Hebden et al.
Hishinuma Yukio
Koyama Shuntaro
Miyamoto Tomohiko
Morihara Atsushi
Nogita Shunsuke
Hitachi , Ltd.
Kratz Peter
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