Control structure comparison for three-product Petlyuk column

doi:10.1016/j.cjche.2017.10.018

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (8): 1621-1630.DOI: 10.1016/j.cjche.2017.10.018

• Selected Papers from the Chinese Process Systems Engineering Annual Meeting 2017 • 上一篇下一篇

Control structure comparison for three-product Petlyuk column

Shengkun Jia¹, Xing Qian^1,2, Xigang Yuan¹, Sigurd Skogestad²

1 School of Chemical Engineering and Technology, Chemical Engineering Research Center, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China;
2 Department of Chemical Engineering, Norwegian University of Science and Technology(NTNU), Trondheim, 7491, Norway

收稿日期:2017-09-06 出版日期:2018-08-28 发布日期:2018-09-21
通讯作者: Xing Qian,E-mail addresses:qianx@mail.buct.edu.cn;Xigang Yuan,E-mail addresses:yuanxg@tju.edu.cn
基金资助:
Supported by the National Basic Research Program of China (973 Program:2012CB720500), the National Supporting Research Program of China (Grant 2013BAA03B01), the National Natural Science Foundation of China (21176178), the China Scholarship Council (201506250011) and the China Postdoctoral Science Foundation (2017M620587).

Control structure comparison for three-product Petlyuk column

Shengkun Jia¹, Xing Qian^1,2, Xigang Yuan¹, Sigurd Skogestad²

1 School of Chemical Engineering and Technology, Chemical Engineering Research Center, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China;
2 Department of Chemical Engineering, Norwegian University of Science and Technology(NTNU), Trondheim, 7491, Norway

Received:2017-09-06 Online:2018-08-28 Published:2018-09-21
Contact: Xing Qian,E-mail addresses:qianx@mail.buct.edu.cn;Xigang Yuan,E-mail addresses:yuanxg@tju.edu.cn
Supported by:
Supported by the National Basic Research Program of China (973 Program:2012CB720500), the National Supporting Research Program of China (Grant 2013BAA03B01), the National Natural Science Foundation of China (21176178), the China Scholarship Council (201506250011) and the China Postdoctoral Science Foundation (2017M620587).

摘要/Abstract

摘要： The focus of this paper is to investigate different control structures (single-loop PI control) for a dividing wall (Petlyuk) column for separating ethanol, n-propanol and n-butanol. Four control structures are studied. All the results are simulations based on Aspen Plus. Control structure 1 (CS1) is stabilizing control structure with only temperature controllers. CS2, CS3 and CS4, containing also composition controllers, are introduced to reduce the steady state composition deviations. CS2 adds a distillate composition controller (CCDB) on top of CS1. CS3 is much more complicated with three temperature-composition cascade controllers and in addition a selector to the reboiler duty to control the maximum controller output of light impurity composition control in side stream and bottom impurity control in the prefractionator. CS4 adds another high selector to control the light impurity in the sidestream. Surprisingly, when considering the dynamic and even steady state performance of the proposed control structures, CS1 proves to be the best control structure to handle feed disturbances inserted into the three-product Petlyuk column.

关键词: Distillation columns, Automatic process control, Computer-aided control system design, Petlyuk columns

Abstract: The focus of this paper is to investigate different control structures (single-loop PI control) for a dividing wall (Petlyuk) column for separating ethanol, n-propanol and n-butanol. Four control structures are studied. All the results are simulations based on Aspen Plus. Control structure 1 (CS1) is stabilizing control structure with only temperature controllers. CS2, CS3 and CS4, containing also composition controllers, are introduced to reduce the steady state composition deviations. CS2 adds a distillate composition controller (CCDB) on top of CS1. CS3 is much more complicated with three temperature-composition cascade controllers and in addition a selector to the reboiler duty to control the maximum controller output of light impurity composition control in side stream and bottom impurity control in the prefractionator. CS4 adds another high selector to control the light impurity in the sidestream. Surprisingly, when considering the dynamic and even steady state performance of the proposed control structures, CS1 proves to be the best control structure to handle feed disturbances inserted into the three-product Petlyuk column.

Key words: Distillation columns, Automatic process control, Computer-aided control system design, Petlyuk columns

Shengkun Jia, Xing Qian, Xigang Yuan, Sigurd Skogestad. Control structure comparison for three-product Petlyuk column[J]. Chinese Journal of Chemical Engineering, 2018, 26(8): 1621-1630.

Shengkun Jia, Xing Qian, Xigang Yuan, Sigurd Skogestad. Control structure comparison for three-product Petlyuk column[J]. Chin.J.Chem.Eng., 2018, 26(8): 1621-1630.

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Control structure comparison for three-product Petlyuk column

Control structure comparison for three-product Petlyuk column

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