Gas: heating and illuminating – Processes – Coal and water
Patent
1975-06-10
1978-07-11
Bashore, S. Leon
Gas: heating and illuminating
Processes
Coal and water
48206, 48DIG4, 201 9, C10J 354
Patent
active
040999335
ABSTRACT:
The gasification of coal to produce a methane-rich product gas is accomplished through the controlled slow heating of particulate coal in a gasifier comprising two or more zones, whereby any significant decrease in the density of the coal particles is minimized and particle swelling and friability are significantly reduced, while the carryover of fines and deposition of tars in the product gas conduit are thereby minimized. The particulate coal heating rate in the gasifier zones is usually between about 10.degree. and 200.degree. F per minute. When the particulate coal is to be fed to the gasifier at elevated temperature, further improvements are achieved with swelling type caking coals through their pretreatment by preheating the coal at a slow rate between 10.degree. and 100.degree. F per minute up to about 800.degree. F in multiple fluidized beds. Any carryover of fines in the product gas stream from the uppermost zone of the gasifier is further reduced by utilizing either a solids separation step or a scrubbing step in the gas stream. The coal particles and/or tars thus recovered are returned to a high temperature zone of the gasifier.
REFERENCES:
patent: 2131702 (1938-09-01), Berry
patent: 2579397 (1951-12-01), Roetheli
patent: 2588076 (1952-03-01), Gohr
patent: 2591595 (1952-04-01), Ogorzaly
patent: 2633416 (1953-03-01), Gornowski et al.
patent: 2683657 (1954-07-01), Garbo
patent: 2772954 (1956-12-01), Jequier
patent: 3740204 (1973-06-01), Slater et al.
patent: 3746522 (1973-07-01), Donatl
patent: 3817723 (1974-06-01), Donatl
Kirk-Othmer Encyclopedia of Chemical Technology, Second Edition, Supplemental Volume, 1971, pp. 186-188.
"Some Relations in Rank and Rate of Heating to Carbonization Properties of Coal", J. S. Delhunty and B. L. Harrison, Fuel, 32 (1953).
Clean Fuels from Coal Symposium, "Present Status of the H-Coal Process", Johnson et al; Inst. of Gas Technology, Sep. 1973.
Johnson Clarence A.
Shen John
Bashore S. Leon
Hydrocarbon Research Inc.
Jacobs Michael A.
Kratz Peter F.
LandOfFree
Process for the multiple zone gasification of coal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the multiple zone gasification of coal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the multiple zone gasification of coal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-259921