Gas: heating and illuminating – Processes – Fuel mixtures
Patent
1982-03-26
1984-04-24
Kratz, Peter F.
Gas: heating and illuminating
Processes
Fuel mixtures
48206, C10J 354
Patent
active
044445687
ABSTRACT:
In a process of simultaneously producing fuel gas and process heat from carbonaceous materials wherein the carbonaceous materials are gasified in a first fluidized bed stage and the combustible constituents left after the gasification are subsequently burnt in a second fluidized bed stage the throughput rate and the flexibility are increased in that the gasification is carried out at a pressure of up to 5 bars and a temperature of 800.degree. to 1100.degree. C. by a treatment with oxygen-containing gases in the presence of steam in a circulating fluidized bed and 40 to 80% of the carbon contained in the starting material are thus reacted. Sulfur compounds are removed from the resulting gas in a fluidized state at a temperature in the range from 800.degree. to 1000.degree. C. and the gas is then cooled and subjected to dust collection. The gasification residue together with the by-products which have become available in the purification of the gas, such as laden desulfurizing agent, dust and aqueous condensate, are fed to another circulating fluidized bed and the remaining combustible constituents are burnt there with an oxygen excess of 5 to 40%.
REFERENCES:
patent: 3807090 (1974-04-01), Moss
patent: 4026679 (1977-05-01), Collin
patent: 4069304 (1978-01-01), Starkovich et al.
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Trends in Process Technology, Processing Nov. 1980, p. 23.
Beisswenger Hans
Daradimos Georg
Hirsch Martin
Plass Ludolf
Serbent Harry
Kratz Peter F.
Metallgesellschaft Aktiengesellschaft
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