System for charging particles entrained in a gas stream
OwnerGaylord W. Penneyinventor
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Abstract
A system for charging dust and the like particles entrained in a gas stream and which are to be electrostatically precipitated. An emitter electrode is disposed in the gas stream for producing ions of one polarity which charge particles in the gas stream. These ions of one polarity and the charged particles are attracted to a surface on which at least a portion of the charged particles collect. The invention resides in the use of a second emitter electrode for producing ions of the opposite polarity which neutralize the ions of the first polarity which have been attracted to the surface and prevent the build-up of a voltage gradient across the particle layer on the surface.
Claims16
In a device for charging particles entrained in aerosol streams, the combination of passive electrodes between which said aerosol streams pass, means for alternately exposing said passive electrodes to positive and negative corona such that particles charged to one sign of corona can be stored on the surface of a passive electrode and subsequently be neutralized by the opposite polarity of corona, means including the passive electrodes for defining separate flow paths which direct separate streams of aerosol to be charged past said passive electrodes, and the positive and negative corona being separated such that any given aerosol stream is exposed to only one sign of corona to charge said particles.
Dependencies are inferred from the claim text.