乙酸异丙酯-异丙醇物系的热集成变压精馏分离模拟  

Process Simulation of Separation of Isopropylacetate-Isopropanol Mixture by Pressure Swing Distillation with Heat Integration

作　　者：韩祯[1,2] 李宏达[1,2] 高鑫[1,3] 李鑫钢[1,3] 李洪[1,3] 

机构地区：[1]天津大学精馏技术国家工程研究中心,天津300072 [2]北洋国家精馏技术工程发展有限公司,天津300457 [3]天津大学化工学院,天津300072

出　　处：《石油化工》2015年第6期663-668,共6页Petrochemical Technology

基　　金：国家自然科学基金资助项目(21336007);国家高技术研究发展计划项目(2015AA030501)

摘　　要：采用Aspen软件及修正的Wilson模型模拟了压力对乙酸异丙酯-异丙醇物系共沸组成的影响,提出该物系基于热集成的变压精馏工艺。在此基础上,研究了系统能耗随变压精馏工艺两塔压力组合的变化趋势,优化了理论塔板数、进料位置、回流比等操作参数。模拟结果表明,高压塔操作压力为0.60 MPa、减压塔操作压力为0.02 MPa时,热集成系统能耗利用最合理。该压力条件下变压精馏工艺的最优理论塔板数为高压塔26块、减压塔38块;最优进料位置为高压塔第15块理论塔板、减压塔第10块理论塔板;基于热集成工艺的最优回流比为高压塔1.0,减压塔2.0。热集成变压精馏工艺可节能28.5%。The effect of pressure on the azeotropic composition of isopropylacetate（IPAC）-isopropanol（IPA） system was simulated by means of the Aspen software and the corrected Wilson model. A pressure swing distillation process with heat integration was proposed for the separation of the IPAC-IPA mixture. The changes of the energy consumption of the system with the pressures of the two columns in the pressure swing distillation process were investigated. The simulation results showed that,the pressure swing distillation process with heat integration could save 28.5% of energy compared with traditional pressure swing distillation under the optimized conditions of operating pressure 0.60 MPa,theoretical plate number 26,feeding plate 15 th and refl ux ratio 1.0 for the high pressure column,and operating pressure 0.02 MPa, theoretical plate number 38,feeding plate10 th and refl ux ratio 2.0 for the vacuum column.

关 键 词：乙酸异丙酯 异丙醇 变压精馏 热集成 模拟优化 节能 

分 类 号：TQ028.13[化学工程]