【摘要】 为了减少炼厂火炬气H₂S废气排放,并将脱除的H₂S资源化利用使该工艺经济上可行,针对石化企业年处理1.5×108 Nm3的火炬气（含硫废气）,开发设计了一套甲基二乙醇胺（MDEA）法深度脱硫以及资源化利用H₂S生产3 600 t甲硫醇的工艺。该技术采用了磁驱动超重力耦合填充床、半解吸-解吸提浓技术实现了高效脱硫与H₂S富集；通过甲硫醚制甲硫醇工艺、脱H₂S重接触工艺和变压精馏工艺保证主、副产品的高回收率和质量指标；采用热泵解吸、甲醇-水双效精馏技术以及优化的换热网络,有效降低了系统能耗。模拟结果表明,本系统深度脱硫处理后的排放尾气中SO₂含量为21.9 mg/m³,产品综合能耗为3 870.2 kgce/t（千克标准煤/吨）,万元产值综合能耗为2 369.4 kgce,优于《“十三五”化工示范项目和资源利用目标》的规定。更多还原

【Abstract】 In order to reduce the emission of H₂S from the flare gas of the refinery and utilize the removed H₂S as resource to ensure the economically feasible of the developed process, a process was developed for deep desulphurization of 1.5×10⁸ Nm³/a flare gas from oil refinery by methyldiethanolamine（MDEA） method and production of 3 600 t/a methanethiol by utilization of concentrated H₂S as a resource. The magnetic-driven super-gravity rotating packed-bed and the half-desorption coupled desorption process were chosen to improve the desulfurization efficiency and the H₂S enrichment degree. The synthesis process of methanthiol from dimethyl sulfide, the recontact column for removal of H₂S and the pressure-swing distillation process ensured the high recovery and the quality of the main-and by-products. The heat pump system in the desorption column, the double-effect distillation for separation of methanol and water and the optimization of the heat-exchange network effectively reduced the energy consumption of the developed process. The simulation results showed that the concentration of SO₂ in the exhausted waste gas from the designed process was 21.9 mg/Nm³. Both the energy consumption per unit product of 3 870.2 kgce and the energy consumption of per 10 000 yuan output value of 2 369.4 kgce are superior to the resource utilization targets of chemical demonstration projects in the 13 th five-year plan.更多还原