Optimization of Internal Thermally Coupled Distillation Columns of Nonideal Mixture

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Optimization of Internal Thermally Coupled Distillation Columns of Nonideal Mixture

LIU Xinggao^a; XU Yongmao^a; QIAN Jixin^b

^a Institute of Process Control Engineering, Automation Department, Tsinghua University,
Beijing 100084, China
^b Institute of Industrial ProcessControl, Zhejiang University, Hangzhou 310027, China

Received:1900-01-01 Revised:1900-01-01 Online:2001-12-28 Published:2001-12-28
Contact: liuxinggao@263.net

内部热耦合精馏塔基于非理想物系的最优评价

刘兴高^a; 徐用懋^a; 钱积新^b

^a Institute of Process Control Engineering, Automation Department, Tsinghua University,
Beijing 100084, China
^b Institute of Industrial ProcessControl, Zhejiang University, Hangzhou 310027, China

通讯作者: 刘兴高

Abstract

Abstract: Internal thermally coupled distillation column(ITCDIC) is a frontier in energy saving
distillation research. In this paper, the optimal assessment on the energy saving and the
operating cost for ITCDIC of nonideal mixture is explored. An evaluating method is
proposed, and the pertinent optimization model is then derived. The ethanol-water system is
studied as an illustrative example. The optimization results show that the maximum energy
saving in ITCDIC process is about 35% and the maximum operating cost saving in ITCDIC
process is about 30%,as compared with a conventional distillation column(CDIC) under the
minimum reflux ratio operating; the optimal operating pressure of the rectifying section is
found to be around 0.25 MPa; the effects of the feedcomposition,operating pressure and the
heat transfer rate on operation are also found and analyzed. It is revealed that ITCDIC
process possesses high energy saving potential and promising economical prospect.

Key words: ITCDIC, optimal assessment, energy saving, operating cost saving

摘要： Internal thermally coupled distillation column(ITCDIC) is a frontier in energy saving
distillation research. In this paper, the optimal assessment on the energy saving and the
operating cost for ITCDIC of nonideal mixture is explored. An evaluating method is
proposed, and the pertinent optimization model is then derived. The ethanol-water system is
studied as an illustrative example. The optimization results show that the maximum energy
saving in ITCDIC process is about 35% and the maximum operating cost saving in ITCDIC
process is about 30%,as compared with a conventional distillation column(CDIC) under the
minimum reflux ratio operating; the optimal operating pressure of the rectifying section is
found to be around 0.25 MPa; the effects of the feedcomposition,operating pressure and the
heat transfer rate on operation are also found and analyzed. It is revealed that ITCDIC
process possesses high energy saving potential and promising economical prospect.

关键词: 内部热耦合精馏塔;非理想物系;最优评价;ITCDIC;节能;传热;回流比

LIU Xinggao, XU Yongmao, QIAN Jixin. Optimization of Internal Thermally Coupled Distillation Columns of Nonideal Mixture[J]. .

刘兴高, 徐用懋, 钱积新. 内部热耦合精馏塔基于非理想物系的最优评价[J]. CIESC Journal.

References

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