Apparatus for removing particles from exhaust gas

• US 4,979,968 A
• Filed: 12/22/1989
• Issued: 12/25/1990
• Est. Priority Date: 12/23/1988
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Square Enix
• Original Assignee: Kabushiki Kaisha Square Enix
• Inventors: Jido, Morio
• Primary Examiner(s): Nozick, Bernard
• Application Number:
  US07/455,006
• Time in Patent Office: 368 Days
• Field of Search: 55/107, 55/122, 55/146
• US Class Current: 96/27
• CPC Class Codes: B03C 3/16 wet type
• CPC Class Codes: B03C 3/51 Catch- space electrodes, e.g. slotted-box form
• CPC Class Codes: F01N 2330/10 Fibrous material, e.g. mineral or metallic wool
• CPC Class Codes: F01N 3/01 by means of electric or electrostatic separators
• CPC Class Codes: F01N 3/033 in combination with other devices with adsorbents or absorbents F01N3/0821
• CPC Class Codes: F01N 3/037 by means of inertial or centrifugal separators, e.g. of cyclone type, optionally combined or associated with agglomerators
• CPC Class Codes: F01N 3/04 using liquids
• CPC Class Codes: F01N 3/0892 Electric or magnetic treatment, e.g. dissociation of noxious components electric filters F01N3/01; regeneration of exhaust filters F01N3/023; heating catalytic converters F01N3/2006
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An apparatus for removing particles from exhaust gas includes an electrode support block formed of a support constituted of electrical insulation material and having a recessed portion that opens to the downstream side of the exhaust gas flow, the electrode support block being arranged in an intake tube through which the flow of exhaust gas that contains the particles is introduced with an intervening space for the flow of exhaust gas between the peripheral surface of the support block and the intake tube. A hollow needle electrode with a spray nozzle at its tip is provided in the base of the recessed portion and a cylindrical electrode is provided in opposition to the hollow electrode around the inner edge of the recessed portion. Provided downstream of the cylindrical electrode is an atomization chamber into which flow the exhaust gas and charged droplets emitted from the spray nozzle. A cylindrical collector electrode is provided around the inside of the atomization chamber. The arrangement prevents the exhaust gas from flowing into the space between the hollow electrode and the cylindrical electrode.

Claims

1. An apparatus for removing particles from exhaust gas comprising:

an intake tube through which the flow of exhaust gas that contains the particles is introduced;

an electrode support block provided in the intake tube with an intervening space for the flow of exhaust gas, the electrode support block being constituted of electrical insulation material and having a bowl-shaped recessed portion that opens toward the downstream side of the exhaust gas flow;

a hollow needle electrode with a spray nozzle at its tip provided in the base of the bowl-shaped recessed portion; and

a cylindrical electrode provided around the inner edge of the recessed portion in opposition to the hollow electrode;

a liquid supply source connected to the spray nozzle by a channel;

an atomization chamber provided downstream of the cylindrical electrode into which flow the exhaust gas and charged droplets emitted from the spray nozzle;

a cylindrical collector electrode provided around the inner periphery of the atomization chamber;

a direct current high voltage source that applies a high voltage between the cylindrical electrode and the hollow and collector electrodes; and

a collector tube provided on the downstream side of the atomization chamber for collecting droplets on which particles in the exhaust gas have been captured.

2. The apparatus according to claim 1, wherein liquid from the liquid supply source is supplied to the spray nozzle by natural flow.

3. The apparatus according to claim 1, wherein the collector tube is comprised of an annular collection chamber and an exhaust pipe provided in the center portion.

4. The apparatus according to claim 3, wherein the annular collection chamber is filled with filter material.