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

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Chinese Journal of Chemical Engineering 2023年第11期63卷 12-20页

作者： Hongru Zhang Yusen Chen Haiyang Cheng Yangyang Wang Peizhe Cui Shiqing Zheng Zhaoyou Zhu Yinglong Wang Yanyue Lu Jun Gao College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China School of Chemistry and Chemical Engineering Guangxi University for NationalitiesNanning 530006China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

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 *** thermodynamic azeotropic behavior and pressure sensitivity analysis,pressure-swing distillation was determined and the optimal separation pressure of each column in the process was *** 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 *** 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 *** 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 *** 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% *** 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

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