Title of article :
Study of magnetically enhanced corona pre-charger
Author/Authors :
Dexuan Xu، نويسنده , , Lianxi Sheng، نويسنده , , Haijun Wang، نويسنده , , Yinghao Sun، نويسنده , , Xiaoyu Zhang، نويسنده , , Junfeng Mi، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
6
From page :
101
To page :
106
Abstract :
In this paper, experimental investigations of the discharge characteristics of magnetically enhanced corona discharges, for the purpose of capturing fine aerosol particles, are presented. The discharge mechanism during such a process is analyzed as well. The effects of magnetic enhancement under different magnet flux densities, and in positive- or negative-corona discharges, were experimentally compared. The magnetically enhanced effects in different inter-electrode regions were studied. Experimental results demonstrated that the magnetic field could efficiently increase the concentrations of both the negative ions and the free electrons during negative-corona discharge. The dominant mechanism of magnetic enhancement in a corona discharge involves the Larmor precessions of free electrons which enhance ionization of the gas molecules near the discharge electrode. A convenient configuration for enhancing corona discharge was formed by placing permanent magnets with a local strong magnetic field near the discharge electrode. A magnetically enhanced negative-corona (MNC) pre-charger was assembled in front of an electrostatic enhancement filter. The influence of the MNC pre-charger on the efficiencies of an electrostatic enhancement filter was measured and compared with that of a conventional corona pre-charger. The free-electron-charging mechanism of the MNC pre-charger was preliminarily analyzed. Our results show that the new pre-charging technique is promising for capturing fine aerosol particles in electrostatic enhancement filters or electrostatic precipitators.
Keywords :
Pre-charger , Chargingaerosolparticles , Capturingfineaerosolparticles , Magneticallyenhancedcoronadischarge
Journal title :
JOURNAL OF ELECTROSTATICS
Serial Year :
2007
Journal title :
JOURNAL OF ELECTROSTATICS
Record number :
1264859
Link To Document :
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