Coal combustion to produce clean low-sulfur exhaust gas

Details Coal combustion to produce clean low-sulfur exhaust gas Coal combustion to produce clean low-sulfur exhaust gas

1985-09-04

1986-07-08

Favors, Edward G.

Furnaces

Process

Treating fuel constituent or combustion product

110344, 110347, 44 1SR, F23J 1100, F23J 1500

Patent

active

045986525

ABSTRACT:
A process is provided for combusting sulfur-containing coal in a combustion stage to which is provided at least 60% of the oxygen stoichiometrically required for substantially complete combustion of the coal and combustion is conducted under highly turbulent conditions in a furnace burner cavity to which finely divided iron oxide and/or iron powder is provided and in which a high heat release rate is maintained to form a liquid iron oxysulfide phase which acts to scrub sulfur-containing gaseous species from the combustion atmosphere and is separated from the combustion atmosphere with substantially the sulfur originally contained in the coal. Following separation, the hot fuel gas resulting is burned to completion in a heat exchanging furnace, gas turbine or other energy extracting device.

REFERENCES:
patent: 4173454 (1979-11-01), Heins
patent: 4377118 (1983-03-01), Sadowski
patent: 4388877 (1983-06-01), Molayem et al.

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