Sterilizing and pesticide-residue-reducing low-temperature plasma generator

Abstract

The invention relates to a sterilizing and pesticide-residue-reducing low-temperature plasma generator, which comprises four parts, namely, an inner tube electrode, a concentric outer tube electrode,a discharge cavity processing device and a high-voltage power supply. The inner tube electrode is composed of an inner electrode lead 4, an inner electrode cylinder 5 and an inner electrode glass tube6. The concentric outer tube electrode is composed of 2-10 layers of concentric glass tubes with electrodes therein. The first layer of outer tube electrode is composed of an outer electrode lead 8,an outer electrode cylinder 9 and an outer electrode glass tube 10, and the other layers are the same. The discharge cavity processing device is composed of an upper cover plate 1, a liquid inlet 2, an air inlet 3 and a liquid separation ring 7. By the invention, liquid to be treated are sterilized and pesticide residues are reduced directly by a low-temperature plasma discharge device. The sterilizing and pesticide-residue-reducing low-temperature plasma generator of the invention has the advantages of large discharge area, stable operation, high efficiency, long service life and the like.

Description

technical field [0001] The invention relates to a low-temperature plasma generator for sterilizing and reducing pesticide residues. Background technique [0002] Plasma is the fourth form of matter other than liquid, gas, and solid. It is electrically neutral and consists of electrons, ions, and unionized neutral particles. Plasma is divided into high-temperature plasma and low-temperature plasma, wherein low-temperature plasma can be generated at room temperature. Low-temperature plasma is generated by high-voltage discharge. During the discharge process, free radicals such as H·,·OH, O3, H2O2 are mainly generated, and local high temperature, shock waves and ultraviolet light are also formed. [0003] Low-temperature plasma technology has been widely used in the degradation of pesticide residues and sterilization. In the 1990s, the United States began to use low-temperature plasma to treat food, and it has commercial applications. Low-temperature plasma has the character...

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Problems solved by technology

[0004] The plasma penetration is not strong, the existence time is short, and it can only act on the surface or shallow layer of the object. The plasma is introduced into the liquid by air blowing, etc., and the treatment effect is not good; the plasma generator electrode is discharged under high voltage. It is easy to be oxidized, which reduces the service life of plasma equipment; due to the different distance between the two electrode plates of plasma discharge, it is easy to cause partial discharge or tip discharge, which reduces the treatment effect; the usual two-electrode plasma treatment capacity is small

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