Filter for particulate materials in gaseous fluids

Details Filter for particulate materials in gaseous fluids Filter for particulate materials in gaseous fluids

1994-11-21

1996-07-30

Chiesa, Richard L.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 99, B03C 3155

Patent

active

055407617

ABSTRACT:
A clog-resistant filter for extracting fine particulate contaminants, such as smoke, from a gaseous fluid stream, such as air, uses interaction between Van der Waals forces and a non-ionizing electrostatic field to efficiently capture the contaminant particles in a filter material whose pores are many times larger than the diameter of the particles to be captured. The filter material is physically so configured to further enhance that interaction and is disposed between at least a pair of electrodes of opposite polarity. The material may be spaced apart from the electrodes, but preferably touches one of them. The particles are trapped generally throughout the thickness of the filter material but ample room is left for continued air flow. The electrostatic voltage is preferably between 3 and 9 kV and is largely independent of electrode spacing. The configuration of the filter material is such that the flow velocity through the material is less than 0.1 m/sec, preferably on the order of 0.03 m/sec.

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Kanagawa Industrial Tech Development, Japanese Newspaper, Oct., 1989.
Nikkei Mechanical Japanese Publication, p. 81, Oct. 1989.

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