文献类型：期刊文献

英文题名：Design and Control of Extractive Dividing Wall Column for Separating Dipropyl Ether/1-Propyl Alcohol Mixture

作者：Ye, Qiliang[1];Wang, Yule[1];Pan, Hui[2];Zhou, Wenyong[1];Yuan, Peiqing[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China

年份：2022

卷号：10

期号：4

外文期刊名：PROCESSES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000786990300001)】；

基金：This work was financially supported by the National Natural Science Foundation of China [Nos. 22178113].

语种：英文

外文关键词：extractive dividing wall column; dipropyl ether; 1-propyl alcohol; energy savings

摘要：The focus of this work is the study of the extractive dividing wall column (EDWC) for separating the azeotropic mixture of dipropyl ether and 1-propyl alcohol with N, N-dimethylacetamide (DMAC) as the entrainer. Three separation sequences are investigated, including a conventional extractive distillation sequence (CEDS), EDWC and a pressure swing distillation sequence (PSDS). The static simulation results showed that the EDWC with DMAC as the entrainer is more economically attractive than CEDS and PSDS. Subsequently, a control structure CS1 based on a three-temperature control loop and a control structure CS2 with the vapor split ratio as the manipulated variable are investigated for the EDWC. Their dynamic control performances are evaluated by facing large feed flow rates and composition disturbances. The results showed that the CS1 can deal with feed flow rate disturbance effectively. However, the transient deviation is large and the settling time is too long when facing feed flow composition disturbances. The CS2 can quickly and effectively deal with feed flow rate and composition disturbances, and it can maintain the two products at high purity.