CIESC Journal ›› 2023, Vol. 74 ›› Issue (2): 796-806.DOI: 10.11949/0438-1157.20221352

• Process system engineering • Previous Articles     Next Articles

Synthesis of heat-integrated distillation sequences with intermediate heat exchangers

Haiou YUAN1(), Fangjun YE1(), Shuo ZHANG1, Yiqing LUO1,2,3(), Xigang YUAN1,2,3   

  1. 1.School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
    2.Chemical Engineering Research Center, Tianjin University, Tianjin 300354, China
    3.State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300354, China
  • Received:2022-10-12 Revised:2022-12-07 Online:2023-03-21 Published:2023-02-05
  • Contact: Yiqing LUO

考虑中间换热器的能量集成精馏序列合成

袁海鸥1(), 叶方俊1(), 张硕1, 罗祎青1,2,3(), 袁希钢1,2,3   

  1. 1.天津大学化工学院,天津 300354
    2.天津大学化学工程研究所,天津 300354
    3.化学工程联合国家重点实验室,天津 300354
  • 通讯作者: 罗祎青
  • 作者简介:袁海鸥(1997—),女,硕士研究生,haiou_yuan@tju.edu.cn
    叶方俊(1998—),男,硕士研究生,yefangjun@tju.edu.cn
  • 基金资助:
    国家自然科学基金项目(21978203)

Abstract:

This study addressed the synthesis problem of distillation sequences considering intermediate heat exchanger (IHE). Using the stochastic optimization strategy, a new method was proposed to synthesize heat-integrated distillation sequences with intermediate heat exchanger (IHE-HIDSs). The binary variables 0/1 are introduced to define whether the IHE is used in the corresponding merge point of two separation tasks in one distillation column. In this way, the synthesis problem is formulated as an implicit mixed-integer nonlinear programming (MINLP) problem, and could be solved by using the hybrid simulated annealing and particle-swarm optimization (SA-PSO) algorithm with the goal to minimize the total annual cost (TAC) of the distillation process. To illustrate the proposed method, two distillation sequence syntheses of five-component alcohols and five-component alkanes were investigated. The results show that IHE-HIDS has a lower TAC than the distillation sequence considering both thermal coupling and energy integration. In addition, the method proposed in this paper can obtain multiple separation sequence solutions with high probability in a reasonable computational time.

Key words: optimization, distillation, algorithm, intermediate heat exchanger, energy integration, sequential synthesis

摘要:

针对考虑中间换热器(IHE)的精馏序列合成问题,提出基于随机优化策略的能量集成非清晰精馏序列(IHE-HIDSs)合成方法。通过对精馏序列分离任务合并处引入二元0/1变量表示是否存在IHE,以精馏序列的年总成本(TAC)为优化目标,建立了该合成问题的隐式混合整数非线性规划模型(MINLP),通过模拟退火和粒子群优化(SA-PSO)混合随机优化算法进行求解。为验证在精馏序列合成中同时考虑IHE的必要性以及所提出合成方法的有效性,对五组分醇类混合物和五组分烷烃类混合物两个算例的精馏序列合成问题进行了研究。结果表明,相比同时考虑热耦合和能量集成的精馏序列,IHE-HIDS具有更低的TAC。此外,所提出的方法可以在合理的计算时间内以高概率获得多个分离序列方案。

关键词: 优化, 蒸馏, 算法, 中间换热器, 能量集成, 序列合成

CLC Number: