Gas: heating and illuminating – Generators – Retort
Patent
1975-04-29
1977-01-25
Serwin, R.E.
Gas: heating and illuminating
Generators
Retort
48210, 75 41, C10J 300, C10J 308
Patent
active
040048950
ABSTRACT:
A vertical shaft furnace having a diameter substantially equal to the height thereof is employed for the clean combustion of coal to convert the coal virtually stoichiometrically to carbon monoxide. After providing a supporting bed of coke in the base of the furnace a mixture of coal and limestone is introduced through the top of the furnace and combustion takes place adjacent a plurality of circumferentially located tuyeres adjacent the top of the coke bed through which a moderate air blast is introduced. The resulting carbon dioxide is completely converted to carbon monoxide as it passes upwardly through the coal and the reducing atmosphere prevents the oxidation of the sulfur in the coal while the decomposed limestone combines with the sulfur to produce sulfur bearing compounds. These compounds, as well as the ash are removed by the slag so that a substantially clean combustion of the coal is achieved to provide a fuel gas which can in turn be cleanly combusted in a separate facility for the generation of power. A substantial transfer of heat from the furnace to the separate facility is accomplished by the nitrogen supplied by the air blast.
REFERENCES:
patent: 2593257 (1952-04-01), Bradley
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