Control of azeotropic dividing wall column and extractive dividing wall column

doi:10.16085/j.issn.1000-6613.2017.02.049

Chemical Industry and Engineering Progree ›› 2017, Vol. 36 ›› Issue (02): 756-765.DOI: 10.16085/j.issn.1000-6613.2017.02.049

Control of azeotropic dividing wall column and extractive dividing wall column

LIU Lixin¹, CHEN Mengqi², LIU Yuliang³, WANG Jianxin², SUN Lanyi²

1 College of Automobile and Transportation, Qingdao University of Technology, Qingdao 266520, Shandong, China;
2 College of Chemical Engineering, China University of Petroleum, Qingdao 266580, Shandong, China;
3 Department of Industrial Engineering & Innovation Sciences, Eindhoven University of Technology, Holland

Received:2016-07-11 Revised:2016-09-11 Online:2017-02-05 Published:2017-02-05

共沸精馏隔壁塔与萃取精馏隔壁塔的控制研究

刘立新¹, 陈梦琪², 刘育良³, 王建新², 孙兰义²

1 青岛理工大学汽车与交通学院, 山东青岛 266520;
2 中国石油大学化学(华东)工程学院, 山东青岛 266580;
3 爱因霍芬理工大学化学工程学院, 荷兰

通讯作者: 刘立新(1972-),女,硕士,副教授,研究方向为道路新材料、工艺、设备及控制。E-mail:llx297403478@163.com。
作者简介:刘立新(1972-),女,硕士,副教授,研究方向为道路新材料、工艺、设备及控制。E-mail:llx297403478@163.com。
基金资助:
山东省自然科学基金（ZR2013EEM024）及山东省高等学校科技计划（J14LA08）项目。

Abstract

Abstract: Azeotropic and extractive dividing wall column were used for the separation of multiple azeotrope mixture or closing-boiling mixture. Steady-state simulation of the two processes was established by Aspen Plus. The different matching relationships between manipulate variables and control variables were determined through the sensitive analysis of steady state relative gain. Then,some two-point temperature control structures for azeotropic dividing wall column while several three-point (or four-point) temperature control structures for extractive dividing wall column were proposed in Aspen Dynamics. After adding dynamic disturbance,it chose the best one for each process:(1) best control structure for azeotropic dividing wall column:Q_MC/F control TMC,13,Q_RC/F control TRC,5,and (2) best control structure for extractive dividing wall column:RRM control TMC1,3,Q_r/F control TMC1,12,RRR control TRC1,3,αv control TMC1,9. Finally,through the analysis of the similarity of the best control structures,it showed that the control structure with the ratio of reboiler duty and mixture feed rate (Q_r/F) can achieve reasonable control performance,which reduced the overshoot of product purities and residual error of these two systerms.

Key words: azeotrope, separation, azeotropic dividing wall column, extractive dividing wall column, control

摘要： 针对多元共沸物或近沸点混合物的分离，采用共沸精馏隔壁塔和萃取精馏隔壁塔两种流程，分别建立稳态模型，并进行了温度灵敏板的选择。针对共沸精馏隔壁塔建立若干两点温度控制结构，针对萃取精馏隔壁塔建立若干三点（及四点）温度控制结构。通过添加进料流量和组成扰动进行测试分析，分别为两种流程挑选了能有效抵抗进料扰动的温度控制结构。①共沸精馏隔壁塔最优控制结构：Q_MC/F控制TMC，13；Q_RC/F控制TRC，5。②萃取精馏隔壁塔最优控制结构：RR_M控制TMC1，3；Q_r/F控制TMC1，12；RR_R控制TRC1，3；α_v控制TMC1，9。最后通过分析两种最优控制结构的相似性，总结得出：带有再沸器与进料量比值（Q_r/F）控制的温度控制结构，可有效降低共沸精馏隔壁塔及萃取精馏隔壁塔体系的余差及超调量。

关键词: 共沸物, 分离, 共沸精馏隔壁塔, 萃取精馏隔壁塔, 控制

CLC Number:

TQ028.1

LIU Lixin, CHEN Mengqi, LIU Yuliang, WANG Jianxin, SUN Lanyi. Control of azeotropic dividing wall column and extractive dividing wall column[J]. Chemical Industry and Engineering Progree, 2017, 36(02): 756-765.

刘立新, 陈梦琪, 刘育良, 王建新, 孙兰义. 共沸精馏隔壁塔与萃取精馏隔壁塔的控制研究[J]. 化工进展, 2017, 36(02): 756-765.

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Control of azeotropic dividing wall column and extractive dividing wall column

共沸精馏隔壁塔与萃取精馏隔壁塔的控制研究

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