Optimization of Internal Thermally Coupled Distillation Columns of Nonideal Mixture  

作　　者：刘兴高 徐用懋 钱积新 

机构地区：[1]Institute of Process Control Engineering,Automation Department,Tsinghua University,Beijing 100084,China [2]Institute of Industrial Process Control,Zhejiang University,Hangzhou 310027,China

出　　处：《Chinese Journal of Chemical Engineering》2001年第4期388-394,共7页中国化学工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(No.20106008);China Postdoctoral Science Foundation,Tsinghua University-Zhongda Group Postdoctoral Science Foundation;the National Environmental Protect Bureau of China(Huan-Ke-Ke,1997,

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 feed composition,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.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 feed composition, 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：ITCDIC optimal assessment energy saving operating cost saving 

分 类 号：TQ02[化学工程]