LOW SULFUR CONTENT, FLY ASH FREE HOT REDUCING GAS PRODUCTION USING CALCIUM OXIDE DESULFURIZATION

摘要

A process and apparatus for producing a low sulfur content, fly ash free hot reducing gas by desulfurizing hot reducing gas by contacting the sulfur-bearing and fly ash containing hot reducing gas with a moving bed of a particulate calcium oxide desulfurizing agent to thereby produce a product gas stream and a byproduct calcium sulfide composition, and then recovering sulfur from the calcium sulfide composition by contacting the calcium sulfide composition with hot liquid water at a temperature and corresponding pressure sufficient to maintain steam in the system and wherein a major portion of the calcium sulfide composition has a particle size of less than about 6 mesh to thereby convert the sulfide to calcium hydroxide and hydrogen sulfide.