变压精馏分离乙酸甲酯-甲醇-乙酸乙酯体系的设计与控制  

Design and control of pressure-swing distillation for separating methyl acetate-methanol-ethyl acetate azeotropic system

作　　者：向晟 王超[1] 庄钰 顾偲雯 张磊 都健[1] XIANG Sheng;WANG Chao;ZHUANG Yu;GU Siwen;ZHANG Lei;DU Jian(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China;School of Photoelectric Engineering,Changzhou Institute of Technology,Changzhou 213032,Jiangsu,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024 [2]常州工学院光电工程学院,江苏常州213032

出　　处：《化工进展》2022年第8期4065-4076,共12页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(21808025,22078041);中央高校基本科研业务费(DUT20JC41)。

摘　　要：聚丙烯醇的生产过程会产生乙酸甲酯-甲醇-乙酸乙酯共沸混合物,如果不及时处理,必然会造成环境污染和资源浪费。本文采用变压精馏的方式,针对乙酸甲酯-甲醇-乙酸乙酯体系设计了两种产品顺序不同的变压精馏分离序列,并采用遗传算法以年度总费用最小为目标,对两种分离序列进行优化设计以获得最优的设计参数。优化结果表明,两种变压精馏分离方案的设备投资费用分别为5.6×10^(5)USD/a和5.7×10^(5)USD/a,能耗费用分别为8.8×10^(5)USD/a和1.0×10^(6)USD/a。此外,对具有经济优势的变压精馏分离方案进行了控制结构的构建,使该过程在面对进料流量扰动和进料组分扰动时仍能维持稳定,稳定之后的三种产品纯度仍能维持在设定值附近。The methyl acetate-methanol-ethyl acetate azeotropic mixtures can be produced in the production process of polypropylene alcohol,which must be treated immediately to avoid the environmental pollution and resource waste.In this paper,two pressure-swing distillation(PSD)separation sequences with different product orders were designed for the separation of methyl acetate-methanol-ethyl acetate mixture,which were economically optimized to obtain the optimal design parameters with the minimal total annual costs as target using genetic algorithm.The results showed that the equipment investment costs were 5.6×10^(5)USD/a and 5.7×10^(5)USD/a,and the energy costs were 8.8×10^(5)USD/a and 1.0×10^(6)USD/a for two PSD separation sequences,respectively.In addition,the control structures of the PSD scheme with economic advantages were constructed,so that the PSD process could remain stable and the purities of the three products after stabilization could still maintain near the initial set values in the face of feed flowrates and compositions disturbances.

关 键 词：变压精馏 动态仿真 优化设计 乙酸甲酯-甲醇-乙酸乙酯 共沸物 

分 类 号：TQ021.8[化学工程]