Collecting Low-Resistivity Dust with Electrostatic Precipitator

To solve the problem of collecting low-resistivity dust with ESP,a method is proposed to coat the ESP plate electrode surface with a special conductive compound so as to form a coating with a certain resistivity.Compares the coated plate electrodes with uncoated ones to discuss their discharge characteristics.The result showed that the ESP with coated plate electrode is available to collect low-resisitivity dust as long as the resistivity of the coating is between 105 Ω·cm and 109 Ω·cm.A formula is deduced to calculate the resistivity of the coating on the basis of the proposed mathematical model,by which the proportion of the conductive powder to be mixed in the compound can be calculated accurately.A contrast experiment was done for the dust-collection performance of ESP with and without such a coating by use of the model,and the ESP with coated surface of plate electrode is evidently superior to that with uncoated surface in dust collection efficiency.