MTO脱甲烷塔模拟与优化  

Simulation and Ptimization of MTO Demethanizer Tower

作　　者：李祚辉 贺杠 高翔 LI Zuo-hui;HE Gang;GAO Xiang(Shaanxi Coal Group Yulin Chemical Co.,Ltd,Shaanxi Yulin 719000,China)

机构地区：[1]陕煤集团榆林化学有限责任公司,陕西榆林719000

出　　处：《广州化工》2024年第6期180-182,共3页GuangZhou Chemical Industry

摘　　要：甲醇制烯烃(MTO)技术是将甲醇转化为低碳烯烃(乙烯、丙烯)的化工工艺,与传统蒸汽裂解工艺相比,甲醇制烯烃(MTO)产品气中氢气、甲烷、一氧化碳等轻组分含量少;脱甲烷塔在甲醇制烯烃(MTO)产品气分离中的主要作用是在塔顶分离轻组分,最终保证乙烯产品中甲烷等轻组分合格;但在实际运行中由于工艺条件的变化导致脱甲烷塔塔顶乙烯损失较大。本文运用Aspen Plus模拟软件,选择RK-SOVE物性方法,应用系统中RadFrac精馏模块对某1 800 kt/a MTO脱甲烷塔进行模拟优化,结合Aspen Plus灵敏度分析工具对相关工艺参数变化对塔顶乙烯损失进行分析,根据灵敏度分析数据指导实际操作。Methanol to olefin(MTO)technology was a chemical process that converts methanol into low-carbon olefins(ethylene,propylene).Compared with traditional steam cracking processes,the MTO product gas contains less light components such as hydrogen,methane,and carbon monoxide.The main function of the demethanizer in the gas separation of methanol to olefins(MTO)products was to separate the light components at the top of the tower,ultimately ensuring that the light components such as methane in the ethylene product are qualified.However,in actual operation,changes in process conditions result in significant ethylene loss at the top of the demethanizer tower.This article used Aspen Plus simulation software,selects RK-SOVE physical property method,and applied RadFrac distillation module in the system to simulate and optimize a 1800 kt/a MTO demethanizer tower.Analyze the ethylene loss at the top of the tower based on changes in relevant process parameters using the Aspen Plus sensitivity analysis tool,and guide practical operations based on sensitivity analysis data.

关 键 词：MTO 脱甲烷塔 乙烯 灵敏度 

分 类 号：TQ221.2[化学工程—有机化工]