不同热集成变压精馏工艺分离乙酸乙酯/正己烷共沸物的优化与控制

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吕利平^1,2，李航²，何树华¹，徐建华¹，李兵^1,3*

1. 长江师范学院化学化工学院，重庆 4081002. 西南石油大学化学化工学院，四川成都 6105003. 中化重庆涪陵化工有限公司，重庆 408100

收稿日期:2019-01-11修回日期:2019-04-15出版日期:2019-12-22发布日期:2019-12-22
通讯作者:李兵

基金资助:重庆市“科技创新领军人才支持计划”;重庆市社会事业与民生保障科技创新专项项目

Design and control of ethyl acetate/n-hexane azeotropic system separation via different heat-integrated pressure-swing distillation process

Liping LÜ^1,2, Hang LI², Shuhua HE¹, Jianhua XU¹, Bing LI^1,3*

1. School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China 2. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China3. Sinochem Fuling Chongqing Chemical Industry Co., Ltd., Chongqing 408100, China

Received:2019-01-11Revised:2019-04-15Online:2019-12-22Published:2019-12-22
Contact:Bing --LI

摘要/Abstract

摘要： 基于变压精馏分离乙酸乙酯/正己烷共沸体系两塔的温差，利用Aspen Plus软件，以年度总成本最小为目标函数，对部分及完全热集成变压精馏工艺进行了稳态模拟及优化。在此基础上，利用Aspen Dynamics软件开发了多种控制结构，通过引入不同进料流量及组成的扰动测试控制结构的有效性。结果表明，完全热集成变压精馏工艺比部分热集成变压精馏工艺的经济性稍好。动态响应结果表明，部分热集成变压精馏工艺的压力?补偿温度控制结构可有效处理不同程度的干扰，能有效提高控制结构对干扰的响应速度，缩短达到新稳态的时间，保证乙酸乙酯和正己烷产品纯度在99.9wt%之上；而完全热集成变压精馏工艺的组分?温度串级控制结构仅能处理较小的组分和流量干扰，实现稳健控制，无法处理较大的干扰。综合比较两种工艺的经济性和可控性，认为部分热集成变压精馏工艺分离乙酸乙酯/正己烷共沸体系优于完全热集成变压精馏工艺。

引用本文

吕利平李航何树华徐建华李兵. 不同热集成变压精馏工艺分离乙酸乙酯/正己烷共沸物的优化与控制[J]. 过程工程学报, 2019, 19(6): 1167-1177.
Liping Lü Hang LI Shuhua HE Jianhua XU Bing LI. Design and control of ethyl acetate/n-hexane azeotropic system separation via different heat-integrated pressure-swing distillation process[J]. Chin. J. Process Eng., 2019, 19(6): 1167-1177.

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