Coal combustion process

Details Coal combustion process Coal combustion process

1979-12-07

1981-08-25

Favors, Edward G.

Furnaces

Process

Burning pulverized fuel

48210, 110229, 431 10, F23D 100

Patent

active

042852838

ABSTRACT:
Disclosed is a process for combusting coal wherein the emission of SO.sub.x or the emission of SO.sub.x and NO.sub.x are minimized. The process comprises (a) providing a coal containing at least twice as much organic calcium than sulfur; (b) burning the coal at a temperature greater than about 1200.degree. C. under reducing conditions; (c) separating the solid effluents from the gaseous effluents; and (d) burning the gaseous effluents at a temperature from about 1000.degree. C. to 1500.degree. C. under oxidizing conditions.

REFERENCES:
patent: 2830883 (1958-04-01), Eastman
patent: 3727562 (1973-04-01), Bauer
patent: 3746498 (1973-07-01), Stengel
patent: 3969089 (1976-07-01), Moss et al.
patent: 4021186 (1977-05-01), Tenner
patent: 4026679 (1977-05-01), Collin
patent: 4060397 (1977-11-01), Buiter et al.
patent: 4144017 (1979-03-01), Barsin et al.
Sulfur Retention in Coal Ash, EPA-600/7-78-153b, Nov. 1978.
The Scale Up of a Fluidized-Bed Combustion System to Utility Boilers, AlChe Symposium Series, vol. 67, No. 116, 1971.
Experimental Studies on the Feasibility of In-Furnace Control of SO.sub.2 and NO.sub.x Emissions from Industrial Stokers, Battelle Energy Program Report, Dec. 15, 1975.

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