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Electrostatic Precipitation of Submicron Particles with an Enhanced Unipolar Pre-Charger

Category: Aerosol Physics and Instrumentation

Volume: 18 | Issue: 5 | Pages: 1141-1147
DOI: 10.4209/aaqr.2017.08.0261
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Zelong Liao1, Yuheng Li1, Xiangsheng Xiao1, Chen Wang1, Shang Cao1, Yong Yang 1,2

  • 1 State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical Engineering and Electronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
  • 2 Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China

Highlights

Two-stage ESP was developed using a simple unipolar pre-charger.
The enhancement of particle charging at submicron range was studied.
The electrical and particle collection performance was evaluated.


Abstract

A two-stage electrostatic precipitator (ESP) has been developed using an enhanced unipolar pre-charger with dielectric coated ground electrodes. The electrical and particle collection performance was evaluated for particles in the submicron range. By varying the voltage applied to the pre-charger, the particle charging characteristics was compared with that calculated by the theoretical model. The experimental results show that with the adoption of the pre-charger, the charging of the particles at submicron range was enhanced. Further results indicate that the collection efficiency can be improved by about 12.1%–15.9%, compared with the results obtained without the pre-charger. Higher particle collection efficiency can be achieved by increasing the voltage applied to the pre-charger. The unipolar pre-charger studied in this paper proves to be a simple and useful device to improve the submicron particle collection efficiency of conventional ESPs.

Keywords

Unipolar pre-charger Electrostatic precipitator Particulate matter Corona discharge Submicron particle


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