10th International Aerosol Conference
September 2 - September 7, 2018
America's Center Convention Complex
St. Louis, Missouri, USA

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Particle Behavior Analysis of Re-entrainment Phenomenon in Electrostatic Precipitator

YOSHIYASU EHARA, Hirotaka Miyasita, Satoshi Kokubu, Hitomi Kawakami, Takashi Inui, Hideyuki Nishida, Tokyo City University

Abstract Number: 477
Working Group: Combustion

Abstract
The particulate matters (PMs) emitted from diesel engine exhaust during the combustion process have low resistivity and extremely small in the submicron range. An after-treatment system using an electrostatic precipitator (ESP) for removing PM emissions from a diesel engine has been studied. However, the collection of low resistive particles is difficult by the conventional ESPs. The low resistive diesel engine particles are detached from the collection electrode, which causes the particle re-entrainment, resulting in poor collection efficiency. In this study, particle image velocimetry was used especially to analyze the ionic wind and particle behavior in ESP. The ESP model was made of clear acrylic. The high voltage electrode was a stainless needle electrode, and the ground electrode was a plate electrode. It became possible to visualize the re-entrainment phenomenon as a result of the experiment. The discharge current characteristics and the movement angle of re-entrainment particles were investigated.