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Study on performance of electrostatic precipitator under multi-physics coupling

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Abstract

A wire-plate electrostatic precipitator (ESP) is developed to analyze the particle transport characteristics and the influence of various factors on the performance of ESP. Above all, an experimental device is built to measure the current density distribution of the plates and obtain good consistency with the numerical simulation results, taking the ESP model established by COMSOL/Multiphysics as the numerical simulating object. Firstly, the electric field is solved by finite element method(FEM) to obtain the potential and charge density distribution. Then, the influence of secondary flow on the main flow at different flow velocities is explored. Finally, multi-physics coupling calculations show the influence of dust particle properties, electrode configuration, and operating conditions on ESP performance. The study found that the particle diameter is positively correlated with its charge, force, and motion, and the relative permittivity of the particles affects the collecting efficiency by affecting its charge difficulty. The wire-to-wire spacing is not proportional to collecting efficiency, when the spacing is 80 mm, the efficiency and the corona current can be maximized. Average electric field strength, corona current density, and current density distribution standard deviation satisfy the cubic function relationship. In addition, the effect of airflow velocity on collecting efficiency and particle precipitation is revealed. It provides a valuable basis for design and performance optimization of ESP.

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Acknowledgments

The authors would like to express their gratitude to Mr. Haibao Zhao and other engineers for experimental support. Useful discussions with Dr. Wenning Zhou and Mr. Chunxiao Zhou are also gratefully acknowledged.

Funding

This work was financially supported by the National Key Research and Development Plan of China (Grant No. 2017YFB0603202) and University of Science and Technology Beijing.

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Authors and Affiliations

  1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Bing Chen, Hongjiao Li, Baiqian Liu & Lijie Zhang

  2. Zhejiang Feida Environmental Science & Technology Co., Ltd., Zhuji City, 311800, Zhejiang Province, China

    Yuzhong He

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  1. Bing Chen
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  2. Hongjiao Li
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  3. Yuzhong He
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  4. Baiqian Liu
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  5. Lijie Zhang
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Correspondence to Bing Chen.

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Responsible editor: Philippe Garrigues

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Chen, B., Li, H., He, Y. et al. Study on performance of electrostatic precipitator under multi-physics coupling. Environ Sci Pollut Res 26, 35023–35033 (2019). https://doi.org/10.1007/s11356-019-06623-8

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  • DOI: https://doi.org/10.1007/s11356-019-06623-8

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