MTO产品分离工艺的模拟与优化  

Simulation and optimization of MTO product separation process

作　　者：李建隆[1] 娄晓燕[1] 刘颖 王宇光 

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]中国化学赛鼎宁波工程有限公司,浙江宁波315040

出　　处：《计算机与应用化学》2013年第5期527-530,共4页Computers and Applied Chemistry

基　　金：山东省自然科学基金资助(ZR2011BQ006)

摘　　要：根据甲醇制低碳烯烃(MTO)产物分布特点,提出了对传统的前脱丙烷流程的改进,针对脱甲烷塔耗能高乙烯损失量大的问题,通过在脱甲烷塔后加一洗涤塔的方式避免了耗能巨大的深冷分离,同时又保证了烯烃产品的收率和纯度,最终乙烯的质量收率可达99.7%,丙烯的质量收率可达99.3%,乙烯的纯度可达99.98%。采用Aspen Plus模拟软件,选择RK-SOVE物性方法,应用系统中的RadFrac精馏模块对流程进行模拟优化,通过灵敏度分析得到回流比、塔板数、进料位置等工艺参数,为该工艺的开发提供理论依据。A method based on the characteristics of Methanol to Light Olefms （MTO） is proposed to improve the traditional depropanizer before cryogenic-separation process. This paper solved the problem of the high energy consumption for demethanizer and large amount of ethylene loss by adding a scrubbing tower before the demethanizer. Finally, the quality of the ethylene yield up to 99.7%, the quality of the propylene yield up to 99.3% and the purity of ethylene up to 99.98%. Simulation software Aspen Plus was used in this article. Selecting the physical method of RK-SOVE and the rectification module of RadFrac, the reflux ratio, number of column plate, feeding locations and other technological parameters were determined through sensitivity analysis in Aspen Plus. This article provided a theoretical basis for process development,

关 键 词：MTO 分离工艺 脱甲烷塔 ASPEN Plus模拟 灵敏度分析 

分 类 号：TQ211[化学工程—有机化工] TQ014