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

1985-02-06

1986-02-25

Favors, Edward G.

Furnaces

Process

Treating fuel constituent or combustion product

44 1SR, 110342, F23J 1100, F23J 1500

Patent

active

045720851

ABSTRACT:
A process is provided for combusting sulfur-containing coal in a single step while producing an off-gas low in sulfur. The process comprises combusting finely divided coal in a furnace burner cavity in the presence of a finely divided iron oxide or iron powder and at least about 60% of the oxygen stoichiometrically required for substantially complete combustion of the coal to form a liquid iron oxysulfide phase and a turbulent atmosphere of combustion-product gases, liquid iron oxysulfide acting to scrub sulfur-containing gaseous species from the atmosphere to yield an essentially sulfur-free flue gas and a liquid iron oxysulfide slag containing substantially the sulfur originally contained in the coal.

REFERENCES:
patent: 4173454 (1979-11-01), Heins
patent: 4377118 (1983-03-01), Sadowski
patent: 4388877 (1983-06-01), Molayem et al.
Stewart, Jr. et al., Pulverized Firing of Aluminum Melting Furnaces, Aluminum Company of America, Apr. 1984.

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