SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2025, Vol. 82 ›› Issue (6): 25-38.DOI: 10.1016/j.cjche.2024.12.028

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Laser-enhanced high-magnification telecentric imaging system for multiphase flow monitoring in membrane fouling

Haohan Xu1,2, Hu Liang1, Xin Feng1,2, Weipeng Zhang1,2, Xiaoxia Duan1,2, Jie Chen1,2, Chao Yang1,2   

  1. 1. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2024-09-29 Revised:2024-12-12 Accepted:2024-12-18 Online:2025-04-19 Published:2025-08-19
  • Contact: Xin Feng,E-mail:xfeng@ipe.ac.cn
  • Supported by:
    Financial support from the National Key Research and Development Program (2022YFB3504000), the National Natural Science Foundation of China (22421003, 22478391, 22178345), and the Youth Innovation Promotion Association CAS (Y2023012, 2022045, 2023052) are gratefully acknowledged.

Laser-enhanced high-magnification telecentric imaging system for multiphase flow monitoring in membrane fouling

Haohan Xu1,2, Hu Liang1, Xin Feng1,2, Weipeng Zhang1,2, Xiaoxia Duan1,2, Jie Chen1,2, Chao Yang1,2   

  1. 1. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 通讯作者: Xin Feng,E-mail:xfeng@ipe.ac.cn
  • 基金资助:
    Financial support from the National Key Research and Development Program (2022YFB3504000), the National Natural Science Foundation of China (22421003, 22478391, 22178345), and the Youth Innovation Promotion Association CAS (Y2023012, 2022045, 2023052) are gratefully acknowledged.

Abstract: Membrane fouling is the primary resistance to the continuous production of stirred membrane reactors. This work presents a laser-enhanced high-magnification telecentric imaging system (LEHTIS), which uses a high-magnification telecentric lens and laser-enhanced illumination to invasively capture the motion of particles on the membrane surface or near the membrane. The problems of working distance and particle interference in the stirred membrane reactor are solved to achieve the purpose of in-situ monitoring of membrane fouling. This method is suitable for high flow rates, high solid holdup, and small particle size systems, and the dynamic motion and accumulation of particles are preliminarily analyzed. It shows that the accumulation and desorption of particles on the membrane surface are related to the physical properties of the membrane surface. There is an intermittent rotational movement in the flow field near the membrane, and it tends to stabilize over time. The filtration process can be assessed by monitoring changes in the overall velocity and acceleration of particles near the membrane. The analysis of forces acting on individual particles is compared and validated with the force balance model to correct and accurately apply it to stirred membrane reactors. The development of LEHTIS provides an effective tool for in-situ monitoring of membrane fouling and optimizing the stirred membrane reactors for industrial applications.

Key words: Membrane fouling, In-situ monitoring, Particle accumulation, Particle motion, Stirred membrane reactor

摘要: Membrane fouling is the primary resistance to the continuous production of stirred membrane reactors. This work presents a laser-enhanced high-magnification telecentric imaging system (LEHTIS), which uses a high-magnification telecentric lens and laser-enhanced illumination to invasively capture the motion of particles on the membrane surface or near the membrane. The problems of working distance and particle interference in the stirred membrane reactor are solved to achieve the purpose of in-situ monitoring of membrane fouling. This method is suitable for high flow rates, high solid holdup, and small particle size systems, and the dynamic motion and accumulation of particles are preliminarily analyzed. It shows that the accumulation and desorption of particles on the membrane surface are related to the physical properties of the membrane surface. There is an intermittent rotational movement in the flow field near the membrane, and it tends to stabilize over time. The filtration process can be assessed by monitoring changes in the overall velocity and acceleration of particles near the membrane. The analysis of forces acting on individual particles is compared and validated with the force balance model to correct and accurately apply it to stirred membrane reactors. The development of LEHTIS provides an effective tool for in-situ monitoring of membrane fouling and optimizing the stirred membrane reactors for industrial applications.

关键词: Membrane fouling, In-situ monitoring, Particle accumulation, Particle motion, Stirred membrane reactor