Device for reducing pollutants in indoor air, ambient air, or exhaust gas by using nonthermal plasma

A device for reducing pollutants in indoor air, ambient air, or exhaust gas by using nonthermal plasma, the device comprising:

• a chamber configured as a tubular body in which processing target gas configured as indoor air, ambient air, or exhaust gas including pollutants flows, the chamber being connected to a ground power source;
• a power supply device disposed outside the chamber and configured to continuously apply voltage having a magnitude set as direct current or alternating current;
• an emitter configured as a hollow tubular body having a plurality of cusps formed on an outer surface thereof and configured to generate plasma, the emitter being disposed in the chamber, elongated in a direction parallel to a flow direction of the processing target gas, electrically connected to the power supply device, and configured to generate nonthermal plasma;
• a rod configured to electrically connect the emitter and the power supply device and support the emitter so that the emitter is disposed at a center of an interior of the chamber;
• and
• an insulator configured to electrically insulate the rod and the chamber and prevent arcing from occurring between the rod and the chamber, and
• wherein the rod includes:
• a vertical rod extending from one side of an inner surface of the chamber to a center of the chamber;
• and
• a horizontal rod extending along the center of the chamber and having a distal end to which the emitter is coupled,
• wherein the insulator surrounds an entire portion of the vertical rod from one side of the inner surface of the chamber to an end of the vertical rod, and
• wherein the device includes at least any one of:
• an insulator lower-end outer sheath made of a metal conductor containing stainless steel and copper and configured to surround an outer surface of the insulator by a length equal to or shorter than a preset height H that is equal to or smaller than ½ of a vertical height h of the emitter from a position of the horizontal rod;
• and
• an insulator upper-end outer sheath made of a metal conductor containing stainless steel and copper and configured to surround the outer surface of the insulator by a length equal to or shorter than the preset height H from the one side of the inner surface of the chamber.