基于塔总组合曲线的内部热耦合精馏塔优化设计方法

doi:10.11949/j.issn.0438-1157.20161116

化工学报 ›› 2017, Vol. 68 ›› Issue (4): 1482-1489.DOI: 10.11949/j.issn.0438-1157.20161116

基于塔总组合曲线的内部热耦合精馏塔优化设计方法

刘雪刚¹, 何畅¹, 雷杨², 何昌春¹, 张冰剑¹, 陈清林¹

1 中山大学化学工程与技术学院, 广东省石化过程节能工程技术研究中心, 广东广州 510275;
2 武汉科技大学化学工程与技术学院, 湖北武汉 430081

收稿日期:2016-08-08 修回日期:2016-11-26 出版日期:2017-04-05 发布日期:2017-04-05
通讯作者: 陈清林
基金资助:
国家自然科学基金项目（21276288，U1462113）；广东省自然科学基金项目（2015A030313112）。

Optimized design method for internal heat-integrated distillation columns based on column grand composite curve

LIU Xuegang¹, HE Chang¹, LEI Yang², HE Changchun¹, ZHANG Bingjian¹, CHEN Qinglin¹

1 School of Chemical Engineering and Technology, Guangdong Engineering Center for Petrochemical Energy Conservation, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China;
2 School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081 Hubei, China

Received:2016-08-08 Revised:2016-11-26 Online:2017-04-05 Published:2017-04-05
Supported by:
supported by the National Natural Science Foundation of China (21276288, U1462113) and the Natural Science Foundation of Guangdong Province(2015A030313112).

摘要/Abstract

摘要：

基于塔总组合曲线（CGCC），提出了一种简化内部热耦合精馏塔（HIDiC）结构的图形设计方法。在完成精馏段（或提馏段）单塔段中间换热器优化设置的基础上，结合精馏段与提馏段CGCC的集成图，以HIDiC的可减小过程总（火用）损为目标，确定HIDiC热耦合中间换热器的最优设计。以苯乙烯-乙苯HIDiC为例，计算结果表明，设置中间换热器后，HIDiC可减小过程总（火用）损最大值为1.951 MW，HIDiC的冷凝器、再沸器负荷分别下降63.6%和68.4%；热耦合中间换热器分别设置于精馏段第2、12、和38块塔板，提馏段第20、28和36块塔板，热负荷依次为0.841、1.496和2.053 MW。

关键词: 热耦合精馏塔, 塔总组合曲线, 热力学, （火用）分析, 优化

Abstract:

A new graphical design method is presented to simplify the configuration of heat-integrated distillation columns (HIDiCs) based on column grand composite curves (CGCCs). On the basis of the optimal arrangement of the side-exchangers on single rectifying (or on single stripping) section, the optimal design of side-exchangers located on HIDiCs thermal coupling section will be determined by combining with the integrated diagram from CGCCs of rectifying and stripping sections and maximizing the available reduced total exergy loss of HIDiC. As a case study, a styrene-ethylbenzene HIDiC is simulated to demonstrate the accuracy and rationality of the graphical method. The results show that the available reduced total exergy loss of HIDiC reaches the maximum (1.951 MW), and the condenser and reboiler duties are reduced by 63.6% and 68.4% after side heat exchangers arrangement, respectively. For achieving this goal, the side-exchangers should be placed on the 2nd, 12th and 38th stages of the rectifying and on the 20th, 28th and 36th stages of the stripping sections, respectively. Their heat duties are 0.841 MW, 1.496 MW and 2.053 MW, respectively.

Key words: heat-integrated column, column grand composition curve, thermodynamics, exergy analysis, optimization

中图分类号:

TQ028.4

刘雪刚, 何畅, 雷杨, 何昌春, 张冰剑, 陈清林. 基于塔总组合曲线的内部热耦合精馏塔优化设计方法[J]. 化工学报, 2017, 68(4): 1482-1489.

LIU Xuegang, HE Chang, LEI Yang, HE Changchun, ZHANG Bingjian, CHEN Qinglin. Optimized design method for internal heat-integrated distillation columns based on column grand composite curve[J]. CIESC Journal, 2017, 68(4): 1482-1489.

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基于塔总组合曲线的内部热耦合精馏塔优化设计方法

Optimized design method for internal heat-integrated distillation columns based on column grand composite curve

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