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Agglomeration of particles by ac corona discharge
Author(s) -
Zukeran Akinori,
Ikeda Yasushi,
Ehara Yoshiyasu,
Ito Tairo,
Takahashi Takeo,
Kawakami Hitomi,
Takamatsu Takeshi
Publication year - 2000
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(200001)130:1<30::aid-eej5>3.0.co;2-f
Subject(s) - electrostatic precipitator , economies of agglomeration , corona discharge , materials science , particle size , particle (ecology) , analytical chemistry (journal) , particle size distribution , ultrafine particle , particulates , corona (planetary geology) , electric field , voltage , nanotechnology , chemical engineering , chemistry , chromatography , physics , oceanography , organic chemistry , quantum mechanics , astrobiology , venus , engineering , geology
Improving the collection efficiency for particles smaller than 1 μm on every precipitator is important. We sought to improve the collection of these particles on an ESP due to particle agglomeration. Particles are charged by ac corona discharge in a precharger and agglomerated by a dc electric field in an agglomerator downstream of the precharger. Diesel exhaust particles were used as particulate matter for the experiments. The distribution of particle size was measured using a particle counter and a scanning electron microscope. By these methods, particles as small as 0.01 μm could be counted. Results showed the agglomeration between particles at ac corona discharge operating mode. The concentration of particles smaller than approximately 0.35 μm decreases, and that of particles larger than approximately 0.35 μm increases in the agglomerator. The agglomeration rate increases with increasing applied voltage, then saturates. These results may be due to the size distribution and to decrease of concentration by agglomeration. © 1999 Scripta Technica, Electr Eng Jpn, 130(1): 30–37, 2000