Electrostatic Precipitator Using Induction Charging
A. Katatani1, H. Hosono2, H. Murata2, H. Yahata2, and A. Mizuno3
1Panasonic Environmental Systems & Engineering Co., Ltd., Japan
2Panasonic Ecology Systems Co., Ltd., Japan
3Department of Environmental and Life Sciences, Toyohashi University of Technology, Japan
Abstract- The authors have had an idea that the power consumption in electrostatic precipitators, ESPs, might be decreased drastically if particles are touching to a conductive electrode in electric field, and are charged by induction charging. One reason is the fact that, in a corona discharge, most of the energy of accelerated electrons near the discharge electrode is wasted by bombardment to neutral molecules without ionization. To verify this idea, the authors have carried out an experiment using two-stage-electrodes sets. The first set of electrodes is made of the flocking electrode covered with ACF (Activated carbon fiber). DC high voltage was applied to the electrodes set. The voltage value was adjusted to be below the corona starting voltage. The second set of electrodes made of flat plates works as a collector of charged particles. This is designated as "a two-stage ESP with induction charging". Varying the gas velocity inside the ESP, the collection efficiency of room-particles was measured. The result showed that the ESP was able to collect particles without corona discharge. This study implies the possibility of ESPs which can minimize the electrical power consumption.
Keywords-Electrostatic precipitator, electrostatic flocking, re-entrainment, induction charging