标题：Triple-column side-stream extractive distillation optimization via simulated annealing for the benzene/isopropanol/water separation
作者：Cui, Yue; Zhang, Zhishan; Shi, Xiaojing; Guang, Chao; Gao, Jun
作者机构：[Cui, Yue; Zhang, Zhishan; Shi, Xiaojing; Guang, Chao; Gao, Jun] Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao 266590, Peoples R Chi 更多
通讯作者：Zhang, Zhishan;Zhang, ZS
通讯作者地址：[Zhang, ZS]Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao 266590, Peoples R China.
来源：SEPARATION AND PURIFICATION TECHNOLOGY
关键词：Extractive distillation; Side-stream column; Simulated annealing;; Economic optimization; Benzene/isopropanol/water
摘要：This paper proposes various side-stream extractive distillation configurations for the benzene/isopropanol/water separation with ethylene glycol as a solvent, including double side-stream extractive distillation (D-SSED), single side-stream extractive distillation (S-SSED) and conventional extractive distillation (CED). The parametric design is investigated with the minimum total annual cost (TAC) as an objective function. It is concluded that the D-SSED scheme is the best option, saving TAC by 31.52% and CO2 emission by 35.56% compared to the CED scheme. During this, one simulated annealing-based optimization procedure is firstly applied to such complex triple-column flowsheets. The accepted optimal solution is readily found through three rounds of search from one base-case. The procedure shows the advantages of time-saving, intelligence and global optimization compared to the common iterative sequential optimization method.