Process for preparing high purity carbon monoxide gas by desulfurization of organic sulfur at low and normal temperature

The invention relates to a technology for removing organic sulfur at a low or normal temperature to prepare high-purity carbonic oxide gas. The method consists of gasifying the coke with carbon monoxide or carbon dioxide to prepare the raw gases including 10 % -99 % CO, 0.1 %-90 % CO2, 0.001 %-2 % O2, 50-9000ppm COS, 10-10000ppm H2S, through gas storage holder, after pressurization and pyrogenation, entering purification tower filled with puripreservatives of A and B to remove hazardous materials including nitrogen oxide, hydrogen arsenide, hydrogen phosphide, hydrogen chloride, hydrogen nitrile, oxides of sulfur and sulfureted hydrogen, entering tower for removing organic sulfur filled with sulfur carbonyl hydrolyst, hydrolyzing 85%-95% of sulfur carbonyl for conversion into sulfureted hydrogen, at 20-150 DEG C, with a pressure of 0.1-10 MP, in which the refined raw gases can be used by productions of fine chemical industry including downstream acetate, dimethyl formamide,dimethyl ether, toluene diisocyanate or methyl diphenylene diisocyanate. The technology converts 85 %-95 % of sulfur carbonyl into sulfureted hydrogen, can adopt routine wet desulfurization to replace polyethylene glycol dimethyl ether desulfuration,can carry out cycle utilization of carbon dioxide and sulfur carbonyl of decarburized desorption gases of polyethylene glycol dimethyl ether, and can carry out zero discharge of poison material of sulfur carbonyl, which is good for environmental conservation.