Vol. 11, No.1, pp.9-12 (2017)
Development of Hole-Type Electrostatic Precipitator
Y. Ehara1, M. Ohashi1, A. Zukeran2, K. Kawakami3, T. Inui3, and Y. Aoki3
1Department of Electrical and Electronic Engineering, Tokyo City University, Japan
2Department of Electrical and Electronic Engineering, Kanagawa Institute of Technology, Japan
3Factory & Facility System Division, Fuji Electric Co., Ltd., Japan
Abstract
The particulate matters (PMs) emitted from marine 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. To address this problem, a new hole-type ESP having a double-cylinder structure was developed to minimize the re-entrainment. In this study, instead of the double-cylinder structure, a parallel-plate structure was chosen to utilize an ion wind more effectively in the hole-type ESP. In order to confirm the re-entrainment inhibition effect, PM collecting characteristics of the hole-type ESP and the conventional ESP were compared.
Keywords - Electrostatic precipitator, particulate matter, marine diesel, re-entrainment