Separation of dimethyl carbonate/methanol via heat pump assisted pressure swing distillation process and system simulation optimization

被引：0
|
作者：
Lin Z. [1 ]
Tian W. [1 ]
An W. [1 ]
机构：
[1] College of Chemistry and Chemical Engineering, Ocean University of China, Shandong, Qingdao
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 11期
关键词：
binary mixture; dimethyl carbonate; distillation; heat pump; simulation;
D O I：
10.16085/j.issn.1000-6613.2022-0110
中图分类号：
学科分类号：
摘要：
To solve the problem of high energy consumption in the separation of dimethyl carbonate (DMC)/methanol (MeOH) azeotrope by traditional pressure swing distillation, an improved pressure swing distillation process assisted by heat pump was proposed, and the feasibility and economy of different heat pump schemes were explored. The research was carried out on the ASPEN PLUS simulation platform. The typical heat integrated pressure swing distillation process (H-PSD) was designed, and the energy bottleneck of the typical process and the direction of process improvement were analyzed based on column grand composite curves. Four types of heat pump assisted improved processes were proposed, and the design parameters of different schemes were obtained by simulation. The energy-saving effect and economy of different heat pump schemes were compared by using the methods of composite curve and economic analysis. The research showed that among four kinds of heat pump schemes, the vapour recompression heat pump with intermediate reboiler had the best economic performance. Compared with the typical heat integrated pressure swing distillation, the energy consumption, the total annual operating cost and the total annual cost of the system were reduced by 24.31%, 29.43% and 12.58%, respectively, which indicated the good energy-saving effect and economy performance of the heat pump assisted process. © 2022 Chemical Industry Press. All rights reserved.
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页码：5722 / 5730
页数：8
相关论文
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