Dynamic control analysis of interconnected pressure-swing distillation process with and without heat integration for separating azeotrope

Jingwei Yang; Zhengkun Hou; Yao Dai; Kang Ma; Peizhe Cui; Yinglong Wang; Zhaoyou Zhu; Jun Gao

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Dynamic control analysis of interconnected pressure-swing distillation process with and without heat integration for separating azeotrope

Separation Science and Engineering | Updated：2026-01-06

- Dynamic control analysis of interconnected pressure-swing distillation process with and without heat integration for separating azeotrope
- Chinese Journal of Chemical Engineering Vol. 29, Issue 1, Pages: 67-76(2021)
- Affiliations：
  
  1. College of Chemical Engineering, Qingdao University of Science and Technology,Qingdao,China,266042
  2. College of Chemical and Environmental Engineering, Shandong University of Science and Technology,Qingdao,China,266590
- Author bio：
- Funds：
- DOI：
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- Published：2021
- Accepted：
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Jingwei Yang, Zhengkun Hou, Yao Dai, Kang Ma, Peizhe Cui, Yinglong Wang, Zhaoyou Zhu, Jun Gao. Dynamic control analysis of interconnected pressure-swing distillation process with and without heat integration for separating azeotrope[J]. Chinese Journal of Chemical Engineering, 2021, 29(1): 67-76.
DOI：

Jingwei Yang, Zhengkun Hou, Yao Dai, Kang Ma, Peizhe Cui, Yinglong Wang, Zhaoyou Zhu, Jun Gao. Dynamic control analysis of interconnected pressure-swing distillation process with and without heat integration for separating azeotrope[J]. Chinese Journal of Chemical Engineering, 2021, 29(1): 67-76. DOI：

摘要

Abstract

Dynamic controls of pressure-swing distillation with an intermediate connection (PSDIC) process of ethyl acetate and ethanol separation were investigated. The double temperature/composition cascade control structure can perfectly implement effective control when ±20% feed disturbances were introduced. This control structure did not require the control of the flowrate of the side stream. The dynamic controllability of PSDIC with partial heat integration (PHIPSDIC) was also explored. The improved control structure can effectively control ±20% feed disturbances. However

in industrial production

simple controller

sensitive and easy to operate

is the optimal target. To avoid the use of component controllers or complex control structure

the original product purities could be maintained using the basic control structure for the PSDIC process if the product purities in steady state were properly increased

albeit by incurring a slight rise in the total annual cost (TAC). This alternative method without a composition controller combined with the energy-saving PSDIC process provides a simple and effective control scheme in industrial production.

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Related Institution

2 School of Chemistry and Chemical Engineering, Yangtze Normal University

2 School of Materials Science and Engineering, Shandong University of Science and Technology

School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Chemical Engineering Research Center, Tianjin University

Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences

School of Chemical Engineering, University of Chinese Academy of Sciences

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