Control structure comparison for three-product Petlyuk column

作     者：Shengkun Jia Xing Qian Xigang Yuan Sigurd Skogestad 

作者机构：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 Department of Chemical Engineering Norwegian University of Science and Technology (NTNU) 

出 版 物：《中国化学工程学报：英文版》 (Chinese Journal of Chemical Engineering)

年 卷 期：2018年第26卷第8期

页      面：1621-1630页

核心收录：

学科分类：0710[理学-生物学] 080706[工学-化工过程机械] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 

基　　金：Supported by the National Basic Research Program of China(973 Program:2012CB720500) the National Supporting Research Program of China(Grant2013BAA03B01) the National Natural Science Foundation of China(21176178) the China Scholarship Council(201506250011) the China Postdoctoral Science Foundation(2017M620587) 

主　　题：控制结构 结构比较 产品 温度控制器 杂质控制 结构处理 CS2 CS3 

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.