Simulation of vapor recompression assisted dividing wall column for wide boiling mixture separation

doi:10.11949/j.issn.0438-1157.20161638

CIESC Journal ›› 2017, Vol. 68 ›› Issue (5): 1906-1912.DOI: 10.11949/j.issn.0438-1157.20161638

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Simulation of vapor recompression assisted dividing wall column for wide boiling mixture separation

LI Murong¹, XU Lianghua¹, XIN Chunwei¹, YUAN Xigang²

1 School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China;
2 State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received:2016-11-18 Revised:2017-01-10 Online:2017-05-05 Published:2017-05-05
Supported by:
supported by the National Natural Science Foundation of China (21406170), the State Key Laboratory of Chemical Engineering (SKL-ChE-15B04), and the Tianjin Municipal Education Commission (20140509).

热泵精馏隔壁塔分离宽沸程物系的模拟

李沐荣¹, 许良华¹, 辛春伟¹, 袁希钢²

1 天津理工大学化学化工学院, 天津 300384;
2 天津大学化工学院化学工程联合国家重点实验室, 天津 300072

通讯作者: 许良华
基金资助:
国家自然科学基金项目（21406170）；化学工程联合国家重点实验室开放课题项目（SKL-ChE-15B04）；天津市教委基金项目（20140509）。

Abstract

Abstract:

Big temperature difference between the overhead and bottom of the dividing wall column (DWC) limited the application of vapor recompression technology into DWC for separating wide boiling mixture, so the DWC with vapor recompression at side product stage scheme is investigated in this paper. With the aid of CGCC profiles, the phase of stream withdrawn from side product stage can be determined, and the corresponding VRC assisted DWC schemes can be achieved. Simulation results for wide boiling mixture separation show that the proposed schemes have high energy efficiency under large vapor and liquid flow rate in the main column.

Key words: dividing wall column, vapor recompression, separation, simulation, optimization

摘要：

将中间换热和热泵精馏两种精馏节能技术应用到隔壁塔中，提出了带中间换热器的热泵精馏隔壁塔流程，以解决隔壁塔在分离宽沸程物系时出现的塔顶与塔底温差过高而不宜应用热泵精馏的问题。利用精馏塔总复合曲线图，可确定中间产品塔板采出流股的相态，从而得到不同类型的热泵精馏隔壁塔流程。宽沸程物系分离实例的模拟计算结果表明，该类流程在主塔气液相流量较大的情况下具有较高的节能效率。

关键词: 隔壁塔, 热泵精馏, 分离, 模拟, 优化

CLC Number:

TQ028

LI Murong, XU Lianghua, XIN Chunwei, YUAN Xigang. Simulation of vapor recompression assisted dividing wall column for wide boiling mixture separation[J]. CIESC Journal, 2017, 68(5): 1906-1912.

李沐荣, 许良华, 辛春伟, 袁希钢. 热泵精馏隔壁塔分离宽沸程物系的模拟[J]. 化工学报, 2017, 68(5): 1906-1912.

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Simulation of vapor recompression assisted dividing wall column for wide boiling mixture separation

热泵精馏隔壁塔分离宽沸程物系的模拟

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