柴油加氢精制工段含硫化氢酸性气体的资源化利用

Resource Utilization of Hydrogen Sulfide-Containing Acid Gas from the Diesel Hydrorefining Section

为了综合利用炼化柴油加氢精制工段所排放的酸性气体,采用了砜胺法提纯硫化氢气体,同时利用乙醇胺溶液吸收提纯酸性气体中的二氧化碳,然后与该工段气中的氢气反应制备甲醇;将得到的硫化氢和甲醇在温度为300~460℃、压力1 MPa的条件下进行气相合成,同时生产甲硫醇、甲硫醚两种产品,可根据市场需求通过调节甲醇和硫化氢的比例调节产两种产品的比例。运用Aspen Plus对全流程进行了流程稳态模拟,并采用萃取精馏技术以降低甲硫醇和甲醇分离能耗。

In order to comprehensively utilize the acid gas discharged from the refinery diesel hydrorefining section,the sulfone amine method was used to purify hydrogen sulfide gas,and the ethanolamine solution was used to absorb and purify the carbon dioxide in the acid gas and then react with the hydrogen to produce methanol.The obtained hydrogen sulfide and methanol were reacted in the gas phase at 300-460℃and 1 MPa to produce methyl mercaptan and dimethyl sulfide simultaneously.The ratio of the two products can be adjusted by adjusting the ratio of methanol and hydrogen sulfide according to the market demand.Aspen Plus was used to conduct the steady-state simulation of the entire process,and extractive distillation technology was used to reduce the energy consumption for the separation of methyl mercaptan and methanol.