SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 44 ›› Issue (4): 29-40.DOI: 10.1016/j.cjche.2021.03.038

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Three-scale integrated optimization model of furnace simulation, cyclic scheduling, and supply chain of ethylene plants

Kexin Bi1,2, Mingyu Yan3, Shuyuan Zhang1,2, Tong Qiu1,2   

  1. 1 Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
    2 Beijing Key Laboratory of Industrial Big Data System and Application, Beijing 100084, China;
    3 Fushun Petrochemical Company, PetroChina, Fushun 113008, China
  • 收稿日期:2020-12-07 修回日期:2021-03-12 出版日期:2022-04-28 发布日期:2022-06-18
  • 通讯作者: Tong Qiu,E-mail:qiutong@tsinghua.edu.cn
  • 基金资助:
    The authors gratefully acknowledge the National Natural Science Foundation of China for its financial support (U1462206, 21991100, 21991104).

Three-scale integrated optimization model of furnace simulation, cyclic scheduling, and supply chain of ethylene plants

Kexin Bi1,2, Mingyu Yan3, Shuyuan Zhang1,2, Tong Qiu1,2   

  1. 1 Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
    2 Beijing Key Laboratory of Industrial Big Data System and Application, Beijing 100084, China;
    3 Fushun Petrochemical Company, PetroChina, Fushun 113008, China
  • Received:2020-12-07 Revised:2021-03-12 Online:2022-04-28 Published:2022-06-18
  • Contact: Tong Qiu,E-mail:qiutong@tsinghua.edu.cn
  • Supported by:
    The authors gratefully acknowledge the National Natural Science Foundation of China for its financial support (U1462206, 21991100, 21991104).

摘要: In order to explore the potential of profit margin improvement, a novel three-scale integrated optimization model of furnace simulation, cyclic scheduling, and supply chain of ethylene plants is proposed and evaluated. A decoupling strategy is proposed for the solution of the three-scale model, which uses our previously proposed reactor scale model for operation optimization and then transfers the obtained results as a parameter table in the joint MILP optimization of plant-supply chain scale for cyclic scheduling. This optimization framework simplifies the fundamental mixed-integer nonlinear programming (MINLP) into several sub-models, and improves the interpretability and extendibility. In the evaluation of an industrial case, a profit increase at a percentage of 3.25% is attained in optimization compared to the practical operations. Further sensitivity analysis is carried out for strategy evolving study when price policy, supply chain, and production requirement parameters are varied. These results could provide useful suggestions for petrochemical enterprises on thermal cracking production.

关键词: Three-scale integrated optimization, Cyclic scheduling, Supply chain, Mixed-integer linear programming, Thermal cracking

Abstract: In order to explore the potential of profit margin improvement, a novel three-scale integrated optimization model of furnace simulation, cyclic scheduling, and supply chain of ethylene plants is proposed and evaluated. A decoupling strategy is proposed for the solution of the three-scale model, which uses our previously proposed reactor scale model for operation optimization and then transfers the obtained results as a parameter table in the joint MILP optimization of plant-supply chain scale for cyclic scheduling. This optimization framework simplifies the fundamental mixed-integer nonlinear programming (MINLP) into several sub-models, and improves the interpretability and extendibility. In the evaluation of an industrial case, a profit increase at a percentage of 3.25% is attained in optimization compared to the practical operations. Further sensitivity analysis is carried out for strategy evolving study when price policy, supply chain, and production requirement parameters are varied. These results could provide useful suggestions for petrochemical enterprises on thermal cracking production.

Key words: Three-scale integrated optimization, Cyclic scheduling, Supply chain, Mixed-integer linear programming, Thermal cracking