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