基于换热网络集成的二甲苯分离精馏塔参数优化

doi:10.16085/j.issn.1000-6613.2016.04.015

化工进展 ›› 2016, Vol. 35 ›› Issue (04): 1062-1067.DOI: 10.16085/j.issn.1000-6613.2016.04.015

基于换热网络集成的二甲苯分离精馏塔参数优化

张迪, 刘桂莲

西安交通大学化学工程与技术学院, 陕西西安 710049

收稿日期:2015-09-01 修回日期:2015-09-21 出版日期:2016-04-05 发布日期:2016-04-05
通讯作者: 刘桂莲,教授,从事系统工程的研究.E-mail:guilianliui@mail.xjtu.edu.cn.
作者简介:张迪(1990-),女,硕士研究生.
基金资助:
国家自然科学基金项目(21476180).

Distillation parameters optimization based on heat exchanger network integration of xylene separation process

ZHANG Di, LIU Guilian

School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

Received:2015-09-01 Revised:2015-09-21 Online:2016-04-05 Published:2016-04-05

摘要/Abstract

摘要： 精馏是化工过程中重要的耗能设备,其产品温度的改变将影响换热网络的集成.针对二甲苯分离吸附的实际生产过程,利用复合曲线系统分析精馏塔DA604塔压增大至170kPa及230kPa后塔顶和塔底产品流股温度改变对换热网络的集成和公用工程消耗量的影响,可实现精馏塔操作与换热网络的同步集成,相较与之前只考虑流股温位对换热网络的影响更加全面.结果表明,该精馏塔的塔压由110kPa增至170kPa时,系统的冷却公用工程用量增大1765.0kW,加热公用工程量减少1948.5kW,无需消耗加热公用工程;压力由110kPa增加至230kPa时,系统冷却公用工程用量增大4964.1kW,加热公用工程用量节省共计8172.4kW,此时加热公用工程用量减小为0且可在高温段向外界供给6223.9kW热量.该分析结果与夹点法的计算结果相同,由该结果可得普适性结论,当精馏塔塔顶塔底出口物流均为源时,增大塔压,系统加热公用工程减小,冷却公用工程增加,整体上有利于系统的节能.

关键词: 精馏, 换热网络, 集成, 夹点

Abstract: Distillation is an important energy-consuming device of chemical process. Temperature variation of its products affects integration of heat exchange network. For the xylene separation process, the effect of distillation column's operating pressure was studied in this work. When the pressure of column DA604 increased to 170kPa and 230kPa, respectively, the composite curve was constructed and used to analyze variation of the pinch and minimum utility consumption. When the pressure increased from 110kPa to 170kPa, the pinch kept unchanged; heating utility decreased by 1948.5kW, while cooling utility increased by 1765.0kW. When the pressure increased from 110kPa to 230kPa, coolinging utility increased by 4964.1kW, while heating utility decreased by 8172.4kW. Namely, the heat demands can be saved and recovered heat by 6223.9kW. The results were the same with those calculated by the pinch analysis method. So when increasing the pressure of a distillation column whose top and bottom products are both sources, heating utility will decrease while cooling utility will increase. It is beneficial for energy saving of the system.

Key words: distillation, heat exchange network, integration, pinch

中图分类号:

TQ021.8

张迪, 刘桂莲. 基于换热网络集成的二甲苯分离精馏塔参数优化[J]. 化工进展, 2016, 35(04): 1062-1067.

ZHANG Di, LIU Guilian. Distillation parameters optimization based on heat exchanger network integration of xylene separation process[J]. Chemical Industry and Engineering Progree, 2016, 35(04): 1062-1067.

参考文献

[1] 李萍,华贲. 过程系统综合集成优化法的研究进展[J]. 广东化工,2005,32(1):80-83.
[2] 王彧斐,冯霄. 换热网络集成与优化研究进展[J]. 化学反应工程与工艺,2014(3):271-280.
[3] GAO X X,MA Z F,YANGL M,et al. Simulation and optimization of distillation process for separating the methanol-chlorobenzene mixture with separate heat-pump distillation[J]. Ind. Eng. Chem. Res.,2013,52(33):11695-11701.
[4] GAO X X,CHEN J,MA Z F,et al. Application of three-vapor recompression heat-pump concepts to dimethylformamide-water distillation column for energy saving[J]. Energy Tech.,2014,2(3):250-256.
[5] HILDE K E,SIGURD S. Selecting appropriate control variables for a heat integrated distillation system with prefractionator[J]. Comput. Chem. Eng.,2004,28:683-691.
[6] GAO X X,CHEN J,MA Z F,et al. Simulation and optimization of distillation processes for separating a close-boiling mixture of n-butanol/isobutanol[J]. Ind. Eng. Chem. Res.,2014,53(37):14440-14445.
[7] JANA A K. Heat integration operation[J]. Appl. Energy,2010,87(5):1477-1494.
[8] ENGELIEN H K,Skogestad S. Selecting appropriate control variables for aheat-integrated distillation system with prefractionator[J]. Comp. Chem. Eng.,2004,28(5):683-691.
[9] LEMME S J,GIVEN W R. Flow through catalytic converters——an analytical and experimental treatment[J]. SAE Paper,1974,2 (1):216-230.
[10] ENGELIEN H K,SKOGESTAD S. Selecting appropriate control variables for a heat-integrated distillation system with prefractionator[J]. Comp. Chem. Eng.,2004,28(5):683-691.
[11] KANSHA Y,TSURU N,SATO K,et al. A. self-heat recuperation technology for energy saving in chemical processes[J]. Ind. Eng. Chem. Res.,2009,48:7682-7686.
[12] ALASFOUR F N,ABDULRAHIM H K. The effects of stage temperature drop on MVC thermal performance[J]. Desalination,2011,265:213-221.
[13] FONYO Z,MIZSEY P. Economic application of heat pumps in integrated distillation systems[J]. Heat Recovery Systems and CHP,1994,14(3):249-263.
[14] CHEN K,WANG S J,WONG D S H. Steady-state design of thermally coupled reactive distillation process for the synthesis of diphenyl carbonate[J]. Comput. Chem. Eng.,2013,52:262-271.
[15] SCHEFFLER T B,LEAO A J. Fabrication of polymer film heat transfer elements for energy efficient multi-effect distillation[J]. Desalination,2009,222(1-3):696-710.

基于换热网络集成的二甲苯分离精馏塔参数优化

Distillation parameters optimization based on heat exchanger network integration of xylene separation process

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