CIESC Journal ›› 2019, Vol. 70 ›› Issue (7): 2584-2593.doi: 10.11949/j.issn.0438-1157.20190017

• Process system engineering • Previous Articles     Next Articles

Multi-objective optimization of heat exchanger networks considering inherent safety

Haotian YE1(),Yining DONG2,Shuang XU1,Xiong ZOU1(),Zhenhua LI2,Hongguang DONG1   

  1. 1. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
    2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
  • Received:2019-01-07 Revised:2019-03-22 Online:2019-07-05 Published:2019-04-23
  • Contact: Xiong ZOU E-mail:yeah0511@mail.dlut.edu.cn;zouxiong@ dlut.edu.cn

Abstract:

Due to the frequent occurrence of major chemical accidents at home and abroad and the increasing demand for energy saving and consumption reduction in the chemical industry, it is of great significance to study multi-objective optimization of heat exchanger networks(HEN) with more secure nature. Evaluation index method was employed to quantify the inherent safety explosiveness, toxicity and inventory for the HEN. Mathematical programming was used to establish a mathematical model of HEN synthesis considering inherent safety. Normalization method was used to obtain the objective function of economy and safety. The case study shows that when explosiveness index is considered, the heat exchange among safer process streams is preferred. When toxicity index is considered, the heat exchangers with toxic process streams are preferred to be eliminated. When inventory index is considered, the number and area of heat exchangers are preferred to be reduced. Then the explosiveness, toxicity, inventory and economy of HEN was optimized simultaneously. And the case study shows that the optimal HEN relies strongly on the selection of economic weight in the proposed objective function.

Key words: heat exchanger network, stage-wise, inherent safety, multi-objective optimization, Pareto front

CLC Number: 

  • TQ 028.8
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