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US 6,221,136 B1Granted
Compact electrostatic precipitator for droplet aerosol collection
AssigneeMSP Corporation
InventorsBenjamin Y. H. Liu, James J. Sun
Life of this patent
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AssigneeMSP Corporation
InventorsBenjamin Y. H. Liu, James J. Sun
Estimating the term…
An electrostatic precipitator has a high voltage electrode including multiple wire segments that are positioned within a surrounding electrically conductive porous media having a central axis and wherein the electrode assembly extends along the central axis. The electrode assembly has a plurality of wire lengths positioned to extend in a direction along the longitudinal axis of the porous media, and the wire segments being arranged to have a substantially longer total length than the length of extension along the longitudinal axis. An aerosol containing droplets is passed into the interior of the porous media, and across the electrode, which is charged with a high voltage. The porous media is at a substantially lower or different voltage from the high voltage electrodes. Flow of the aerosol containing particles charged by the electrode passes through the porous media to the outlet and the charged particles are precipitated by the porous media. Electrostatic shields are provided around high voltage insulators to reduce the likelihood of contamination of the insulators, which causes unsatisfactory current leakage.
An electrode assembly comprising a discharge electrode, an adjacent collector electrode having a surface, and a support structure having a longitudinal length and a transverse width, the discharge electrode comprising a plurality of spaced thin wire segments supported on said structure with a total length substantially longer than the length and the width, said wire being substantially uniform in diameter, maintained at substantially the same distance from the adjacent collector electrode, and charged to a high voltage potential relative to said collector, wherein the spacing “S” between wire segments and the distance “D” between each wire segment and the nearest point on the adjacent collector electrode surface are selected so the ratio S/D is within the range of 0.3 to 3.
An electrostatic precipitator in combination with a diesel engine having crankcase blowby, and a connection to carry a flow of the blowby gas through the electrostatic precipitator for removing suspended particulate matter including oil droplets from the blowby gas, said electrostatic precipitator comprising a discharge electrode, an adjacent collector electrode, a housing containing the electrodes, an insulator, a conductor passing through said insulator and carrying the high voltage to the discharge electrode inside said housing, and a heater, said housing having an inlet and outlet and carrying blowby gas from the inlet to the outlet, said insulator having an external surface in contact with blowby gas inside said housing, and said insulator being in contact with said heater to maintain a surface temperature on the insulator at 10° or more above the temperature of the blowby gas and maintained sufficiently high to prevent precipitation of oil droplets and contaminant buildup on said insulator surface from the blowby gas.
An electrostatic precipitator comprising a housing having an inlet and an outlet;
Dependencies are inferred from the claim text.