Grounding-electrode wind-cooling plate type ozone-producing unit

Abstract

The invention relates to an earth electrode wind-cooling flat-plate ozone generating unit, and belongs to the technical field of application of gas ionization discharge, plasma chemistry, environmental engineering and the like. The earth electrode wind-cooling flat-plate ozone generating unit is characterized in that both an earth electrode and a discharge electrode are in a rectangular flat-plate mode; the earth electrode and a cooling fin on the rear side are made of the same metal such as composite steel aluminum, stainless steel and titanium; a dense ionization discharge electric field is formed in a narrow gap between the discharge electrode and the wind-cooling earth electrode, and the electric field strength reaches between 100 and 400 kilovolts per centimeter; and electric field parameters are adopted to adjust and control oxygen molecule dissociation, and oxygen atoms, oxygen atom ions and the free radical concentration are generated by dissociative ionization reaction, so that the ozone production quantity and the ozone concentration are controlled, the redecomposition of controllable ozone is realized, and the ozone concentration reaches between 80 and 160 milligrams per liter. The earth electrode wind-cooling flat-plate ozone generating unit has the advantages of using wind cooling to replace water cooling or oil cooling, using the flat-plate ozone generating unit to replace a tube-type ozone generating unit, realizing the wind-cooling flat-plate small ozone generating unit, and highly efficiently generating ozone with high concentration and large production quantity.

Description

technical field [0001] The invention belongs to the fields of gas discharge physics, atmospheric pressure plasma physics and the like, and relates to a ground electrode air-cooled flat-plate ozone generating unit. Background technique [0002] There are many kinds of existing ozone generating methods or devices, most of which use water to cool the grounding electrode, while the Japanese flat Otto~plate type ozone generating device uses insulating oil to cool the discharge electrode and the grounding electrode to suppress the temperature rise of the gas in the discharge gap. In order to produce high-concentration ozone and reduce its decomposition. [0003] However, due to the restriction of the glass manufacturing industry level, it is difficult to obtain a glass dielectric sheet with high flatness and high precision thickness. Due to the poor mechanical strength of glass, it is easy to break. A bigger problem is that due to the poor frequency characteristics of the glass ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the restriction of the glass manufacturing industry level, it is difficult to obtain a glass dielectric sheet with high flatness and high precision thickness

Due to the poor mechanical strength of glass, it is easy to break

A bigger problem is that due to the poor frequency characteristics of the glass dielectric and the low dielectric constant, as the frequency increases, the temperature of the dielectric layer increases, and the breakdown voltage of the dielectric decreases, making it easy to break down

Due to the large discharge gap distance and the thickness of the dielectric plate, the ozone concentration is low and the ozone generation efficiency is not high

[0004] At present, the problems of the ozone generating device are bulky, high operating cost, heavy maintenance workload, and complex structure; insulating oil is used to cool the discharge electrode and ground electrode at the same time, which is easy to leak oil, and there are complicated and huge cooling accessories at the same time; glass The thickness of the dielectric layer is large, the flatness is low, the capacitance and dielectric constant of the dielectric are small, and the frequency characteristics of the glass dielectric are poor, which leads to the increase of the temperature of the medium during high-frequency power supply, which is easy to break down, and the electric field strength of the discharge gap is also reduced. The power is also greatly reduced, and the electric loss is greatly increased, so the ozone concentration and ozone production efficiency are low; the discharge gap distance is large, and the discharge electric field strength is low. The energy is much lower than the dissociation energy of oxygen molecules, which is 8.4eV. Only a small part of the oxygen atoms are decomposed and ionized into oxygen atoms, oxygen atom ions and free radicals, etc., which is not conducive to ozone production; since the ozone decomposition energy is 2eV, now The discharge electric field strength of the ozone generating device is 40-60kV / cm, and the average electron energy of the electrons is between 2.0-8.6eV. Among them, the electrons below 8.4eV collide with the ozone molecules to decompose them, and the ozone concentration is reduced. ;Because the electric field strength of the discharge gap is less than 60kV / cm, it is difficult for the ozone generating device to realize the generation of high concentration ozone and the miniaturization of the device

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