Simulated annealing-based optimal design of energy efficient ternary extractive dividing wall distillation process for separating benzene-isopropanol-water mixtures

doi:10.1016/j.cjche.2020.08.041

摘要/Abstract

摘要： This article investigates the performances of different extractive distillation processes intensified with dividing-wall column for separating benzene-isopropanol-water ternary mixtures. All the processes with ethylene glycol as solvent are optimized with the minimal total annual cost (TAC) as target. In order to get the global optimal solution intelligently, an improved simulated annealing algorithm is adopted, which is programmed in MATLAB and linked to Aspen Plus. The results show that the extractive dividing wall column-solvent (EDWC-S) process consisting of an extractive dividing wall column and a solvent recovery column is the best scheme. It can reduce the TAC by 28.65% and CO₂ emissions by 32.84% compared to the conventional triple-column extractive distillation process.

关键词: Extractive distillation, Dividing wall column, Simulated annealing, Optimization, Benzene/isopropanol/water

Abstract: This article investigates the performances of different extractive distillation processes intensified with dividing-wall column for separating benzene-isopropanol-water ternary mixtures. All the processes with ethylene glycol as solvent are optimized with the minimal total annual cost (TAC) as target. In order to get the global optimal solution intelligently, an improved simulated annealing algorithm is adopted, which is programmed in MATLAB and linked to Aspen Plus. The results show that the extractive dividing wall column-solvent (EDWC-S) process consisting of an extractive dividing wall column and a solvent recovery column is the best scheme. It can reduce the TAC by 28.65% and CO₂ emissions by 32.84% compared to the conventional triple-column extractive distillation process.

Key words: Extractive distillation, Dividing wall column, Simulated annealing, Optimization, Benzene/isopropanol/water

Min Li, Yue Cui, Xiaojing Shi, Zhishan Zhang, Xiaoxiao Zhao, Xiuyu Zhu, Jun Gao. Simulated annealing-based optimal design of energy efficient ternary extractive dividing wall distillation process for separating benzene-isopropanol-water mixtures[J]. 中国化学工程学报, 2021, 33(5): 203-210.

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