JP2004224591A - Double-pipe type gas discharge reactor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double pipe type gas discharge reactor having a simple structure and manufactured at a low cost. <P>SOLUTION: The double-pipe type gas discharge reactor comprises an inner pipe and an outer pipe, both made of a dielectric material, and has a cylindrical inner electrode arranged in the inner pipe and a cylindrical outer electrode arranged around the outer periphery of the outer pipe. In the reactor, a gas supply pipe is fitted to an annular space between the inner pipe and the outer pipe so that the treatment gas supply direction is tangential to the circumference of the inner pipe. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a double-tube discharge gas reactor such as a double-tube silent discharge ozone generator.
[0002]
[Prior art]
Conventionally, as shown in FIG. 3, a double-tube discharge gas reactor 10 such as a double-tube silent discharge ozone generator has a dielectric layer 11 formed of a dielectric material such as glass. A cylindrical outer electrode 14 made of stainless steel or the like on which a dielectric layer 11 is provided is concentrically arranged via a discharge gap 13 on the outer periphery of a cylindrical inner electrode 12 made of stainless steel or the like. 15 and the cylindrical inner and outer electrodes 12 and 14 are connected.
A gas supply pipe 16 for supplying a gas to be treated to the double-tube discharge gas reactor 10 is connected to a cylindrical inner electrode 12 of an annular discharge gap 13 between the cylindrical inner electrode 12 and the cylindrical outer electrode 14. It was mounted perpendicular to the circumference.
[0003]
[Patent Document 1]
JP-A-7-33405
[Problems to be solved by the invention]
However, in the conventional installation of the gas supply pipe 16 for the gas to be treated, the supplied gas collides in the annular gap which is the discharge gap 13 between the cylindrical inner electrode 12 and the cylindrical outer electrode 14, as shown in FIG. However, the flow of the processing gas becomes turbulent, and as a result, the residence time of the processing gas in the double tube type discharge gas reactor 10 becomes uneven, and the discharge processing efficiency is reduced because the discharge energy is not sufficiently provided. There was a problem.
[0005]
In order to make the flow of the gas to be treated in the double tube discharge gas reactor a piston flow, a method has been proposed in which gas distributors are installed at the gas inlet and / or outlet. However, in this method, the structure becomes complicated, flow resistance of the gas to be treated is increased and also had a problem that the bulk-free and production costs.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a double-tube discharge gas reactor having a simple structure that solves the problems of the prior art and that is inexpensive.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the first aspect of the present invention provides a double-tube discharge gas reactor in which a gas supply direction from a gas supply tube matches a tangential direction of a circumference of an inner tube of the double tube. It is characterized by comprising.
[0008]
According to a second aspect of the present invention, in the double-tube discharge gas reactor according to the first aspect, a cylindrical inner electrode is provided on the inner periphery of the inner tube of the double tube formed of the dielectric material and the inner tube. It is characterized in that it is installed and a cylindrical outer electrode is arranged on the outer periphery of the outer tube.
[0009]
[Action]
The supply pipe of the processing gas to the discharge gas reactor composed of the cylindrical inner electrode and the cylindrical outer electrode installed on the inner tube and the outer tube of the double tube formed of a dielectric material such as glass is supplied. The processing gas is swirled through the annular gap between the cylindrical inner electrode and the cylindrical outer electrode by mounting the gas so that the gas introduction direction is tangential to the circumference of the inner tube on which the cylindrical inner electrode is installed. As a result, the piston gas flows approximately as a result, the discharge energy is evenly applied to the processing gas, the discharge processing efficiency increases, and as a result, the power efficiency also increases.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the double-tube discharge gas reactor 1 has a double-tube structure including an inner tube 2 and an outer tube 3 formed of a dielectric material such as glass. The upper ends of the inner pipe 2 and the outer pipe 3 are connected, and the annular space 4 between the inner pipe 2 and the outer pipe 3 is closed. The lower end of the inner tube 2 is closed. A gas discharge pipe 5 is provided at a lower end of the outer pipe 3. A processing gas supply pipe 6 is provided above the outer pipe 3.
[0011]
A cylindrical inner electrode 7 made of stainless steel or the like is provided on the inner circumference of the inner tube 2. A cylindrical outer electrode 8 made of stainless steel or the like is provided on the outer periphery of the outer tube 3. As an example, the diameter of the cylindrical inner electrode 7 is 60 mm, the total length is 1000 mm, the interval (discharge gap) between the annular gaps 4 between the cylindrical inner and outer electrodes 7 and 8 is 1 mm, and the AC power supply 9 and the cylindrical inner and outer electrodes 2 are formed. , 3 are connected.
[0012]
As shown in FIG. 2, the gas supply pipe 6 installed on the cylindrical outer electrode 3 is installed such that the processing gas supply direction is tangential to the circumference of the inner pipe 2.
[0013]
The usage of the double-tube discharge gas reactor 1 of the present invention will be described. First, a processing gas is supplied to the annular gap 4 through the gas supply pipe 6 to fill the annular gap 4 with the processing gas. Thereafter, when a voltage is applied between the cylindrical inner and outer electrodes 7 and 8 by the AC power supply 9, a silent discharge is started. Processing gas is continuously supplied from the processing gas supply pipe 6 in the tangential direction of the circumference of the inner pipe 2. The processing gas of a predetermined pressure supplied in the tangential direction of the circumference of the inner pipe 2 flows while swirling through the annular gap 4 between the cylindrical inner and outer electrodes 7 and 8, and the processing gas filled in the annular space 4 is moved by the piston. The gas flows in the direction of the gas discharge pipe 5 as a flow similar to the flow. With the configuration of the processing gas supply pipe 6 of the present invention, the flow of the processing gas in the annular space 4 does not become a turbulent state, but becomes a flow similar to a piston flow, so that discharge energy is uniformly given to the processing gas. Discharge processing efficiency increases, and power consumption efficiency also increases.
As a result of applying the configuration of the processing gas supply pipe 6 of the present invention to a double-tube type silent discharge ozone generator (Siemens type ozonizer), the power efficiency was increased by 15 to 23% as compared with the conventional one.
[0014]
【The invention's effect】
The processing gas supply pipe to the discharge gas reactor consisting of the cylindrical inner electrode and the cylindrical outer electrode installed on the inner and outer pipes of a double pipe made of a dielectric material such as glass The process gas is swirled through the annular gap between the cylindrical inner electrode and the cylindrical outer electrode by mounting so that the introduction direction of the cylindrical inner electrode is tangential to the circumference of the inner tube on which the cylindrical inner electrode is installed. As a result, the flow becomes approximately piston flow, the discharge energy is evenly applied to the processing gas, the discharge processing efficiency increases, and as a result, the power efficiency also increases.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of one embodiment of the present invention.
FIG. 3 is a partial sectional view showing a conventional example.
[Explanation of symbols]
1: Double tube discharge gas reactor 2: Inner tube 3: Outer tube 4: Annular gap 5: Gas discharge tube 6: Gas supply tube 7: Cylindrical inner electrode 8: Cylindrical outer electrode 9: AC power supply 10: Double tube discharge gas reactor 11: Dielectric layer 12: Cylindrical inner electrode 13: Discharge gap 14: Cylindrical outer electrode 15: AC power supply 16: Gas supply pipe

Claims (2)

In a double tube discharge gas reactor, the gas supply direction from the gas supply tube is configured to coincide with the tangential direction of the circumference of the inner tube of the double tube. vessel. A cylindrical inner electrode is provided on the inner periphery of an inner tube of a double tube comprising an inner tube and an outer tube formed of a dielectric material, and a cylindrical outer electrode is arranged on the outer periphery of the outer tube. 2. The double-tube discharge gas reactor according to 1.

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