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FUGITIVE AND FINE PARTICLE CONTROL USING ELECTROSTATICALLY CHARGED FOG
Citation:
Hoening, S. FUGITIVE AND FINE PARTICLE CONTROL USING ELECTROSTATICALLY CHARGED FOG. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-79/078.
Description:
The report gives results of a study of fugitive and fine particle control using electrostatically charged fog. Most industrial pollutants acquire an electrostatic charge as they are dispersed into the air. Exposing this charged airborne material to an oppositely charged water fog enhances contact between the particles and the fog droplets. After contact, the wetted particles agglomerate rapidly and fall out of the atmosphere. This technique has been tested on a wide variety of industrial pollutants ranging from silica flour to SO2 and fly ash. In general, there has been significant suppression of pollution with a minimum of water fog. In addition, electrostatic hoods and screens can be used to push or direct pollutants to the proper area for collection. The system is therefore well suited to control of moving fugitive dust sources where the usual duct and baghouse systems are ineffective or too costly. The charged fog systems are now being tested in varous industrial applications with generally good results. All work to date, including industrial applications that have been released by the companies involved, are discussed in the report. The report covers work on: developing new charged fog systems for controlling fugitive dust; demonstration testing of the systems in industrial locations; and designing and constructing a high-temperature stack simulator for fog gun testing.