SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 63 ›› Issue (11): 12-20.DOI: 10.1016/j.cjche.2023.04.016

• Full Length Article • 上一篇    下一篇

Comprehensive analysis on the economy and energy demand of pressure-swing distillation and pervaporation for separating waste liquid containing multiple components

Hongru Zhang1, Yusen Chen1, Haiyang Cheng1, Yangyang Wang1, Peizhe Cui1, Shiqing Zheng1, Zhaoyou Zhu1, Yinglong Wang1, Yanyue Lu2, Jun Gao3   

  1. 1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    2. School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, China;
    3. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  • 收稿日期:2023-01-02 修回日期:2023-04-11 出版日期:2023-11-28 发布日期:2024-01-08
  • 通讯作者: Yinglong Wang,E-mail:wangyinglong@qust.edu.cn;Yanyue Lu,E-mail:luyanyue@163.com
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22078166).

Comprehensive analysis on the economy and energy demand of pressure-swing distillation and pervaporation for separating waste liquid containing multiple components

Hongru Zhang1, Yusen Chen1, Haiyang Cheng1, Yangyang Wang1, Peizhe Cui1, Shiqing Zheng1, Zhaoyou Zhu1, Yinglong Wang1, Yanyue Lu2, Jun Gao3   

  1. 1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    2. School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, China;
    3. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  • Received:2023-01-02 Revised:2023-04-11 Online:2023-11-28 Published:2024-01-08
  • Contact: Yinglong Wang,E-mail:wangyinglong@qust.edu.cn;Yanyue Lu,E-mail:luyanyue@163.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22078166).

摘要: A large amount of waste liquids containing methanol/acetone/water mixtures are produced in the synthesis of methyl methacrylate (MMA). Under the advocacy of green chemical industry, it is urgent to develop an efficient, economic and energy-saving mixture separation process. Through thermodynamic azeotropic behavior and pressure sensitivity analysis, pressure-swing distillation was determined and the optimal separation pressure of each column in the process was obtained. Due to the composition of waste liquids produced were quite different in MMA production, the pressure-swing distillation separation process was designed to fully achieve the accurate waste liquids treatment. Taking the total annual cost (TAC) as the target, the sequential iteration method was used to optimize the process, and the impact of composition on economy was compared. In order to further realize the energy-saving of the separation process, the pervaporation membrane module was introduced to pretreat the waste liquid in the pressure-swing distillation. The results showed that the TAC of the coupling process was 46% higher than that of the pressure-swing distillation process, and the thermodynamic efficiency was 30% higher. This study provides waste liquid treatment technology for enterprises and analyzes its economic and energy efficiency, which has reference significance for the development of coupled separation technology.

关键词: Distillation, Pervaporation, Organic compounds, Sequential iterative algorithms, Economy and energy consumption

Abstract: A large amount of waste liquids containing methanol/acetone/water mixtures are produced in the synthesis of methyl methacrylate (MMA). Under the advocacy of green chemical industry, it is urgent to develop an efficient, economic and energy-saving mixture separation process. Through thermodynamic azeotropic behavior and pressure sensitivity analysis, pressure-swing distillation was determined and the optimal separation pressure of each column in the process was obtained. Due to the composition of waste liquids produced were quite different in MMA production, the pressure-swing distillation separation process was designed to fully achieve the accurate waste liquids treatment. Taking the total annual cost (TAC) as the target, the sequential iteration method was used to optimize the process, and the impact of composition on economy was compared. In order to further realize the energy-saving of the separation process, the pervaporation membrane module was introduced to pretreat the waste liquid in the pressure-swing distillation. The results showed that the TAC of the coupling process was 46% higher than that of the pressure-swing distillation process, and the thermodynamic efficiency was 30% higher. This study provides waste liquid treatment technology for enterprises and analyzes its economic and energy efficiency, which has reference significance for the development of coupled separation technology.

Key words: Distillation, Pervaporation, Organic compounds, Sequential iterative algorithms, Economy and energy consumption