Effective capture of respirable sized particulates using electrostatic precipitator technology.

The electrostatic precipitator widely used for the prevention of particulate pollution from industrial sources, can also be effective, when correctly sized and operated, for the collection of respirable fine particulates. That is, those below some 2 micron diameter, particularly of heavy metals which tend to be cumulative and hence injurious to health. Following a review of the basic principles of operation of electrostatic precipitators, specifically addressed to the capture of fine particulates, an outline of the various types of equipment used for collecting solid and liquid(mist) particulates will be discussed. Finally some typical precipitator applications will be illustrated, together with suggestions as to how efficiencies can be further increased to meet compliance with any potential future changes in legislation.