Simulation and energy-saving analysis for separating propylene glycol mixtures via four-product Kaibel dividing wall column

被引：0
|
作者：
Li T. [1 ]
Zhang Y. [1 ]
Lin Z. [1 ]
Bie H. [1 ]
An W. [1 ]
机构：
[1] Department of Chemical Engineering, Ocean University of China, Shandong, Qingdao
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 10期
关键词：
distillation; exergy; Kaibel column; optimal design; propylene glycol;
D O I：
10.16085/j.issn.1000-6613.2021-2644
中图分类号：
学科分类号：
摘要：
The separation of four-component mixtures containing methanol, water, propylene glycol and dipropylene glycol was studied. A new process using four-product Kaibel dividing wall column (Kaibel column) was proposed in terms of the characteristics of the separation system and separation requirements. The design and energy-saving analysis of Kaibel column were performed by Aspen Plus. Firstly, a three-column distillation (TCD) process and a heat-integrated three-column distillation (HTCD) process were proposed to separate four-component mixtures. Secondly, a simulation for separating four-component mixtures via four-product Kaibel dividing wall column was conducted, and the column design parameters that meet the separation requirements were obtained. Finally, the energy consumption features of Kaibel column were analyzed and compared using an approach based on energy balance and exergy loss analysis. The results showed that compared with the heat-integrated three-column distillation process, Kaibel column didn’t have an advantage in terms of operating costs, but had a significant advantage in terms of equipment investment. It permits separation of a four-component mixture into four pure fractions in a column and the total exergy loss can be reduced by 9.41%. © 2022 Chemical Industry Press. All rights reserved.
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页码：5221 / 5227
页数：6
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