焦煤中添加缚硫剂的炼焦煤气脱硫研究

REMOVAL OF H_2S FROM COKE OVEN GAS BY MIXING ZnO-BASED ADDITIVE INTO COAL

研究考察了在焦煤中添加 Zn O基缚硫剂进行炼焦过程煤气脱硫的效果。结果表明 ,煤中添加 Zn O基缚硫剂可以达到很好的炼焦过程煤气脱硫目的 ,无需设备投入 。

A new technology for removal of sulfur from coking oven has been developed The new technology is based on mixing the ZnO base additive into the coke coal In the stage of pyrolysis of the coal volatile, ZnO combine with H 2S, CS 2 and COS of coal gas forming solid ZnS in coal char In the stage of coking of the coal char, Zn is gasified with S Then the gas Zn react with H 2S,CS 2 and COS forming solid ZnS and depositing on coal gas conductor After the collected ZnS is regenerated, it can be recycling as additive again The sulfur in coal gas can be fully removed, and the sulfur in coke is also slightly decreased comparing with that of no additive to coal The cost of the desulfurization of COG by this technology is lower than that by the others