1 引言 目前我国以煤、天然气、重油等为原料的中小型合成氨厂、尿素厂、甲醇厂等,其变换气净化过程在脱碳的同时,为获得高精度的脱硫效果,往往采用湿法、干法等数项脱硫方法相串联,导致流程过长,增加生产过程的不稳定因素,且消耗过多的能量和费用。如小尿素的脱碳脱硫流程,配置了变换气干法脱硫、湿法脱碳脱硫以及常解CO_2气干法脱硫 1 Introduction At present, China’s small and medium-sized ammonia plant, urea plant, methanol plant and other raw materials for coal, natural gas, heavy oil, etc., while changing the gas purification process decarburization at the same time, to obtain high-precision desulfurization effect, Drying several desulfurization methods in series, resulting in the process is too long, increasing the instability of the production process, and consume too much energy and costs. Such as small urea decarbonization desulfurization process, equipped with a shift gas dry desulfurization, wet decarbonization desulfurization and often solve the CO 2 dry gas desulfurization