Separation of fine dust with AC-energized electrostatic precipitators

In addition to studies with DC-energized electrostatic precipitators (ESPs) this paper presents the results of experimental investigations with a plate-type laboratory-scale AC ESP. These precipitators are relatively insensitive to the dust resistivity. The paper's theoretical part deals with the basic physical mechanisms of the separation of particles with AC energization. This is followed by an overview of general methods for AC-precipitation. Finally, this paper describes experiments with a modified laboratory-scale AC ESP, excelling by the absence of back corona. Fractional efficiency measurements were conducted for various geometric and electric parameters and constant gas conditions.