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1.5×10^8 Nm^3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3600 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/m^3,产品综合能耗为3870.2 kgce/t(千克标准煤/吨),万元产值综合能耗为2369.4 kgce,优于《“十三五”化工示范项目和资源利用目标》的规定。
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 1.5×10^8 Nm^3/a flare gas from oil refinery by methyldiethanolamine(MDEA)method and production of 3600 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/Nm^3.Both the energy consumption per unit product of 3870.2 kgce and the energy consumption of per 10000 yuan output value of 2369.4 kgce are superior to the resource utilization targets of chemical demonstration projects in the 13th five-year plan.
作者
徐磊
孟成伟
冯少华
钱婕
楼红枫
刘华彦
章渊昶
周猛飞
祝铃钰
蔡亦军
Xu Lei;Meng Chengwei;Feng Shaohua;Qian Jie;Lou Hongfeng;Liu Huayan;Zhang Yuanchang;Zhou Mengfei;Zhu Lingyu;Cai Yijun(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China)
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2018年第6期489-498,共10页
Chemical Reaction Engineering and Technology
关键词
火炬气
脱硫
硫化氢
甲硫醚
甲硫醇
flare gas
desulfurization
hydrogen sulfide
dimethyl sulfide
methanthiol
作者简介
徐磊(1995—),男,本科生;通讯联系人:刘华彦(1969—),男,副教授。E-mail:hyliu@zjut.edu.cn。
