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Dielectric barrier corona discharge reactor

A dielectric barrier and corona discharge technology, applied to electrical components, plasma, etc., can solve problems such as small diameter of discharge filaments, damage to materials, and spark breakdown

Inactive Publication Date: 2011-04-20
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the industrial application of plasma surface treatment and chemical modification, the high temperature of the arc will damage the material being processed; it is usually difficult for the plasma jet to form a large area of ​​uniform plasma; DBD plasma has the following disadvantages: (1) DBD consists of Composed of some discharge filaments, it is difficult to uniformly treat the surface of the material; (2) The diameter of the DBD discharge filament is small but the current density is high, which may ablate or perforate the surface of the medium or the sample
If the discharge voltage is increased, it is easy to form spark breakdown

Method used

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specific Embodiment 1

[0038] Specific embodiment one: Atmospheric pressure plasma sterilization

[0039] The inactivation experiment of the bacteria on the surface of the glassware was done by using an atmospheric pressure dielectric barrier corona discharge reactor. The results show that the plasma generated by this discharge reactor can make 10 6 The magnitude of Bacillus subtilis was completely inactivated in 2 minutes, and the spores of Bacillus subtilis var. niger and Bacillus stearothermophilus were all inactivated after 5 minutes. This shows that the bactericidal effect of the discharge reactor plasma of the present invention is very effective. Moreover, during the sterilization process, the temperature inside the discharge reactor does not increase significantly, so it will not affect the properties of the material itself.

[0040]This is because a large amount of ultraviolet light can be emitted during the plasma generation process, and this high-energy ultraviolet light can destroy nucl...

specific Embodiment 2

[0043] Specific embodiment two: plasma surface modification

[0044] The use of plastic materials as tissue culture materials is becoming more common due to their low cost, ease of use, and ease of sterilization. However, the surface of untreated materials is hydrophobic and cannot provide enough binding sites for cells and bioactive molecules to effectively bind to their surfaces.

[0045] Put the petri dish and culture bottle into the discharge reactor, discharge to generate plasma, and process in the discharge reactor for 10-15 minutes. The surface of the culture dish and culture flask treated with plasma changes from hydrophobic to hydrophilic, which acquires the ability to support cell adhesion and spreading, increases the number and speed of cell reproduction, and thus is more suitable for cell culture.

[0046] The plasma discharge reactor is suitable for the treatment of large-scale cell culture dishes, can inhibit the proliferation of spores, and improve the reliabil...

specific Embodiment 3

[0047] Specific embodiment three: polluted gas treatment

[0048] Pollution gases refer to flue gases and malodorous gases. The reactor is used for polluted gas treatment. like Figure 4 As shown, it has a cylindrical gas-collecting tank, and the two ends of the gas-collecting tank are provided with an air inlet and an air outlet. The tank is equipped with a discharge reactor, and the distance between the inner and outer electrodes of the discharge reactor is 40mm. Due to the large flow of polluted gas in practical applications, multiple corona discharge units are placed in parallel in order to increase the treatment capacity of polluted gases and improve the treatment efficiency.

[0049] In the same applied voltage and discharge space gap, the discharge reactor can generate and transmit more charges and output higher discharge power because of the corona ionization effect. Stronger pulse voltage and current can be obtained during discharge, which makes the energy more con...

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Abstract

The invention discloses a dielectric barrier corona discharge reactor which comprises an outer electrode, an inner electrode and a dielectric barrier layer positioned between the outer electrode and the inner electrode, wherein the outer electrode is connected with a power supply, and the inner electrode is grounded. The dielectric barrier corona discharge reactor can generate and transmit more charges under same external voltage and discharge spatial clearance due to corona ionization effect and simultaneously output higher discharge power. The dielectric barrier corona discharge reactor can obtain stronger pulse voltage and current during discharge and enable energy during the discharge to be more centralized.

Description

technical field [0001] The invention relates to a plasma generating device, in particular to a dielectric barrier corona discharge reactor. Background technique [0002] In low-temperature plasma applications, when the gas is ionized to generate electrons and positive ions, they generally combine within a period of time and return to the neutral molecular state. Free radicals are often generated during molecular dissociation; the generated electrons combine with neutral atoms and molecules to form negative ions. Therefore, the entire plasma is a mixed state of electrons, positive and negative ions, excited atoms, atoms, and free radicals. Because various chemical reactions are carried out in a highly excited state, it is completely different from the classical chemical reaction, and the active particles produced by the usual chemical reactor are more diverse, more active, and easier to occur with the materials in contact. reaction, so they are used to treat and chemically ...

Claims

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Application Information

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IPC IPC(8): H05H1/46
Inventor 沈洁孟月东程城方世东
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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