Study On Motion Of Charged Particles In Electric Field Of Electrostatic Precipitator

With society progressing, environment protection gradually becomes the peoplecared focus. In order to reduce the air pollution created by the industrial dust and waste, it isimportant to develop and improve electrostatic precipitator(ESP). Because of the differencesof the configuration of wire-plate ESPs, electric fields are different in the ESPs which resultsin the discrepancy of collection efficiency between theory and application. Seven factorswhich influence the collection efficiency and the influence of electric field force, gravity andion wind etc on the motion of dust have been investigated experimentally and theoretically.The ions wind and concentration of ions in wire-plate ESP are studied mainly.First, for the investigation of ions wind, the velocity characteristics of ions wind in ESPare analyzed experimentally under different conditions. The results show that the velocity canreach several meters per second and it is greater than the velocity of dusts caused by electricfield. This will cause ions and particles mix even uniformity, and increase the union of them.It is advantageous to ESP.Second, the effect on ion concentration of different conditions is studied in ESP,including the effect of the interval of collecting electrodes, the interval and the number ofdischarge electrodes and the difference of discharge electrodes. The results indicate that theion concentration under same interval of collecting electrodes in ESP is mainly determined bythe voltage. In order to obtain the most appropriate ion concentration, the voltage should bedetermined according to the interval of collecting electrodes.Investigation of the ion wind and ion concentration provides new theoretical method andtechnology for the optimization design of ESP.