Numerical simulation and experimental study on PM2.5 capture performance of multiple electric field ESP under different magnetic field introduction positions--颗粒学报PARTICUOLOGY

Numerical simulation and experimental study on PM2.5 capture performance of multiple electric field ESP under different magnetic field introduction positions

Shengxin Yang^{a 1}, Jianping Zhang^{b 1 *}, Boren Wang^c, Wen Gu^c, Weiguo Zhou^c

a School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
b School of Information Science and Technology, Sanda University, Shanghai, 201209, China
c Shanghai Donghai Wind Power Generation Co., Ltd., Shanghai, 200090, China

10.1016/j.partic.2025.12.009

Volume 109, February 2026, Pages 117-126

Received 29 July 2025, Revised 30 November 2025, Accepted 11 December 2025, Available online 2 January 2026, Version of Record 7 January 2026.

E-mail: zjpusst@163.com

Highlights

• Dust-removal mechanism in multiple electric field ESP is investigated.

• Magnetic confinement effect can significantly promote the trapping of fine particles.

• Particle motion under different operating conditions is analyzed by PIV experiments.

• Magnetic field location affects particle trajectory and collection performance.

• Low flue gas flow rate and voltage enhance magnetic confinement.

Abstract

Aiming at enhancing the capture performance of electrostatic precipitator (ESP) for PM_2.5 particles, this paper introduces a multi-field coupling model and carries out the analysis of the electromagnetic dedusting mechanism of four electric field ESP under the magnetic-field-induced trajectory modification, and investigates the capture performance of multiple electric field ESP for PM_2.5 particles at different magnetic field introduction positions through numerical simulations and PIV (Particle Image Velocimetry) experiments. The PIV measurements showed flow-field patterns that were consistent with established ESP findings, where higher applied voltage and lower flue-gas velocity lead to stronger particle deflection toward the collection plate. These observed trends serve as a validation of the reliability of the present PIV setup and simulation model. Introducing a magnetic field into a specific zone resulted in particles to follow a spiral path leading to the collection plate. This motion not only altered the paths of particles in the targeted region but also influenced adjacent zones. Magnetic confinement was found to be more effective under low flue gas velocity and low operating voltage conditions. Furthermore, at lower voltages, the third electric field was more sensitive to magnetic confinement, whereas at higher voltages, the fourth electric field exhibited greater sensitivity. The findings can offer new design ideas for performance enhancement of traditional ESPs.

Graphical abstract

Keywords

Multiple electric field ESP; Magnetic field introduction position; PIV experiment; Magnetic confinement; Capture performance

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