Indoor air purification method by using medium for blocking off low-temperature plasma generated by discharge

Abstract

The invention discloses a method of room air purification with low temperature plasma generated by dielectric resistance discharging. The harmful gas of air can be wiped off by dielectric resistance discharging plasma which is in magnetic field: the needle plate electrode is the reaction electrode, the dielectric resistance discharging can be realized by inserting a dielectric-slab which is 1mm-5mm in thickness at the side of the plate electrode, the distance of the needle electrode is 6mm-30mm, the nanosecond frontal high-voltage narrow pulse power supply is applied to the two ends of the needle plate electrode, the voltage is 10kv-60kv, the permanent magnet is mounted on the two ends of the electrode; The harmful gas of air can be wiped off by pulse discharging plasma which is in magnetic field. At the base of parallel magnetic field, the harmful gas can be wiped off by the low temperature plasma generated by the nanosecond frontal pulse dielectric resistance discharging in the invention, so the purification efficiency is improved greatly.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to an air purification method, in particular to a low-temperature plasma indoor air purification method by introducing a magnetic field and utilizing nanosecond frontier pulse dielectric barrier discharge. Background technique [0002] Indoor environmental pollution is the third largest air pollution problem in the world after soot pollution and photochemical pollution. It will cause significant losses to residents' health and the entire social economy. In my country, the main pollutants in indoor air include suspended particles, nitrogen oxides, sulfur oxides, hydrocarbons, etc. [0003] At present, indoor air purification technologies mainly include adsorption, electrostatic, negative ions, photocatalysis, membrane separation, and low-temperature plasma. The adsorption method can effectively remove most organic pollutants, ammonia, sulfide, radioact...

AI Technical Summary

Problems solved by technology

The application of low-temperature plasma technology in pollution control has become an emerging interdisciplinary subject. At present, the application research in this field is very active at home and abroad. It can remove low concentrations of volatile organic compounds and microorganisms in the air, and can also remove nitrogen oxides and sulfur dioxide. and other inorganic gases, such as the patent "a lamp with a plasma air purification device", patent number: CN200410016646.5, which proposes to purify the air by generating non-equilibrium plasma through partial discharge between needle plate electrodes, and purify the lamp and plasma air The device is integrated, simple in structure, easy to install, and has multiple functions such as lighting and air purification, but there are still disadvantages such as unstable discharge and low purification efficiency, such as the patent "indoor air purification method introducing magnetic field", patent number: CN200410073573.3 discloses a method of introducing a magnetic field, microsecond-level high-voltage pulse corona discharge to generate low-temperature plasma to purify air, the method has the advantages of low cost, small volume, high purification efficiency, etc. Corona discharge, the discharge is not stable enough, and the energy utilization rate is not high. After further research, it is found that the dielectric barrier discharge at the front of the nanosecond pulse can obtain higher purification efficiency.

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