A Low Temperature Plasma Generator with Helical Surface Structure

Abstract

The invention discloses a low-temperature plasma generator with a spiral edge surface type structure. The low-temperature plasma generator comprises a chamber (1), wherein a cylindrical quartz glass tube is arranged as the chamber (1); a high-voltage electrode (2) is arranged in the chamber (1); a low-voltage electrode (3) is arranged on the periphery of the middle part of the chamber (1); a cooling device (4) has an annular structure and is sleeved on the periphery of the low-voltage electrode (3); and outward projected circular openings are formed in the side walls at the two ends of the chamber (1) and are respectively used as a smoke inlet and a smoke outlet. In the low-temperature plasma generator disclosed by the invention, O2 is uniformly sprayed to the inner wall of the chamber, the high-voltage electrode and the low-voltage electrode can discharge along the inner wall of the chamber to generate active free radicals, such as, O3 and O, along the surface, so that the smoke pollutant is oxidized into a high valence state; and only O2 is activated by the discharge, so that the problem of energy waste caused by the activation of the background gases (gas molecules, including N2, CO2, and the like) of the present electron beam method and pulse corona method can be solved.

Description

technical field [0001] The invention relates to a low-temperature plasma generator, in particular to a low-temperature plasma generator with a helical creeping surface structure. Background technique [0002] There are many ways to generate plasma, such as ultraviolet radiation, X-ray, electromagnetic field, heating and so on. Most laboratory and industrial products use electromagnetic fields to excite plasma, such as DC glow discharge, radio frequency discharge, microwave discharge and dielectric barrier discharge (DBD). Among them, DBD is a gas discharge form in which an insulating medium is inserted into the discharge space, and the medium can cover the electrodes. When a sufficiently high AC voltage of a certain frequency (50MHz to several megahertz) is applied between the discharge electrodes, the gas between the electrodes will be broken down to produce a dielectric barrier gas discharge. [0003] At present, there are basically two ways for DBD equipment to generate...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a generator of a spiral creeping dielectric barrier discharge, oxygen is evenly sprayed onto the inner wall of the cavity through each ring of the spiral hollow perforated stainless steel wire, At the same time, the high-voltage electrode and the low-voltage electrode discharge along the inner wall surface of the cavity, generating O along the surface. 3 , O and other active free radicals, thereby oxidizing the flue gas pollutants into a high-valence state, and the discharge only activates the O 2 , overcame the background gas (N 2 and CO 2 and other gas molecules) and waste energy

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