SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (4): 737-744.DOI: 10.1016/j.cjche.2018.08.001

• Fluid Dynamics and Transport Phenomena •     Next Articles

Structural parameter optimization for novel internal-loop iron-carbon micro-electrolysis reactors using computational fluid dynamics

Lei Zhang1, Mengyu Wu1, Yanhe Han1, Meili Liu1, Junfeng Niu2   

  1. 1 Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
    2 Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
  • Received:2018-05-04 Revised:2018-07-18 Online:2019-06-14 Published:2019-04-28
  • Contact: Yanhe Han
  • Supported by:
    Supported by the National Natural Science Foundation of China (21677018) and Jointly Projects of Beijing Natural Science Foundation and Beijing Municipal Education Commission (KZ201810017024).

Structural parameter optimization for novel internal-loop iron-carbon micro-electrolysis reactors using computational fluid dynamics

Lei Zhang1, Mengyu Wu1, Yanhe Han1, Meili Liu1, Junfeng Niu2   

  1. 1 Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
    2 Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
  • 通讯作者: Yanhe Han
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21677018) and Jointly Projects of Beijing Natural Science Foundation and Beijing Municipal Education Commission (KZ201810017024).

Abstract: It is generally recognized that internal-loop reactors are well-developed mass and heat-transfer multiphase flow reactors. However, the internal flow field in the internal-loop reactor is influenced by the structure parameter of the reactor, which has a great effect on the reaction efficiency. In this study, the computational fluid dynamics simulation method was used to determine the influence of reactor structure on flow field, and a volume-offluid model was employed to simulate the gas-liquid, two-phase flow of the internal-loop micro-electrolysis reactor. Hydrodynamic factors were optimized when the height-to-diameter ratio was 4:1, diameter ratio was 9:1, draft-tube axial height was 90 mm. Three-dimensional simulations for the water distributor were carried out, and the results suggested that the optimal conditions are as follows:the number of water distribution pipes was four, and an inhomogeneous water distribution was used. According to the results of the simulation, the suitable structure can be used to achieve good fluid mechanical properties, such as the good liquid circulation velocity and gas holdup, which provides a good theoretical foundation for the application of the reactor.

Key words: Iron-carbon micro-electrolysis, Internal cycling, Computational fluid dynamics, Structure design

摘要: It is generally recognized that internal-loop reactors are well-developed mass and heat-transfer multiphase flow reactors. However, the internal flow field in the internal-loop reactor is influenced by the structure parameter of the reactor, which has a great effect on the reaction efficiency. In this study, the computational fluid dynamics simulation method was used to determine the influence of reactor structure on flow field, and a volume-offluid model was employed to simulate the gas-liquid, two-phase flow of the internal-loop micro-electrolysis reactor. Hydrodynamic factors were optimized when the height-to-diameter ratio was 4:1, diameter ratio was 9:1, draft-tube axial height was 90 mm. Three-dimensional simulations for the water distributor were carried out, and the results suggested that the optimal conditions are as follows:the number of water distribution pipes was four, and an inhomogeneous water distribution was used. According to the results of the simulation, the suitable structure can be used to achieve good fluid mechanical properties, such as the good liquid circulation velocity and gas holdup, which provides a good theoretical foundation for the application of the reactor.

关键词: Iron-carbon micro-electrolysis, Internal cycling, Computational fluid dynamics, Structure design