Method to enhance removal of sulfur compounds by slag

Details Method to enhance removal of sulfur compounds by slag Method to enhance removal of sulfur compounds by slag

1988-02-24

1989-07-18

Favors, Edward G.

Furnaces

Process

Burning pulverized fuel

F23D 100

Patent

active

048482510

ABSTRACT:
Disclosed is a process for combustion of carbonaceous substances containing ash and sulfur in slagging combustors wherein the fraction of sulfur retained in the slag is enhanced, emissions of nitrogen oxide are reduced, and operating problems with the furnace are avoided. The process comprises control of slag within a temperature range of 2000.degree.-2500.degree. F., slag stoichiometry less than oxidizing, and gas phase stoichiometry near stoichiometric.

REFERENCES:
patent: 4217132 (1980-08-01), Burge et al.
patent: 4232615 (1980-11-01), Brown
patent: 4285283 (1981-08-01), Lyon
patent: 4407206 (1983-10-01), Bartok et al.
patent: 4586443 (1984-05-01), Burge et al.
patent: 4685404 (1987-08-01), Sheppard et al.
Breen et al. "A Review of In-Furnace NO.sub.x Reduction and SO.sub.x Reduction by Sorbent Injection", EPRI CS-1382, 11, 1982.
England et al. "Coal-Fired Precombustors for Simultaneous NO.sub.x, SO.sub.x and Particulate Control", EPA/EPRI Primary Source NO.sub.x Symposium, Boston, Mass., May 1985.

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