Contaminated air purifying apparatus
AssigneeAjiawasu Kabushiki Kaisha
InventorHideo Yoshikawa
Life of this patent
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Abstract
A contaminated air purifying apparatus capable of decreasing particles such as dust floating in air, soot produced by a combustion engine and the like and air pollutants such as nitrogen oxides (NOx) contained in exhaust gas. Particulates such as dust, soot and the like are electrostatically negatively charged and collected in a purifying filter section by coulombic force. NOx is converted into N.sub.2 and CO.sub.2 by an action of carbon fiber or carbon particles, resulting in decreased in concentration. The carbon fiber and carbon particles are preferably modified into an increased surface area of 200 to 2000 m.sup.2 /g.
Claims19
A contaminated air purifying apparatus comprising:
- a contaminated air influx path;
- a DC power supply for providing a voltage between 12 and 500 volts, said power supply having a positive electrode and a negative electrode,
- an electrifying mesh section containing a porous electrically conductive material and connected to said negative electrode or said DC power supply, said porous electrically conductive material being selected from the group consisting of net of 40 to 500 meshes, punched metal of 40 to 500 meshes and woven fabric of 40 to 500 meshes;
- and
- a purifying filter section including a layer containing an electrically conductive material and connected to said positive electrode of said DC power supply;
- said purifying filter section being arranged after said electrifying mesh section in a direction of flow of contaminated air in said contaminated air influx path.
Dependencies are inferred from the claim text.