JPH10120403A - Ozonizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an abnormal discharge inside an earthed electrode tube and improve an ozone generation efficiency by generating uniform discharge in an ozonizer having a high voltage electrode in a cell, having an earthed electrode tube at a coaxial periphery of the high voltage electrode through discharge gaps, applying a pulse voltage between the high voltage electrode and the earthed electrode tube and generating ozone in a raw material gas distributed in the discharge gaps. SOLUTION: In this ozonizer, both ends of a high voltage electrode 3 are respectively fixed by each one end of two pieces of metal plates 12a and 12b under a tension capable of equalizing discharge gaps 2 at an outer part of the discharge gaps 2 in a cell 11 and each other ends of the metal plates 12a and 12b are fixed to the cell 11 through insulators 13a and 13b, then a pulse voltage is applied between the other ends of the metal plates 12a and 12b and an earthed electrode tube 1 from a pulse electric source 4 or 4a and 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone generator used for water treatment and human waste treatment, and more particularly to an electrode structure of a pulse type ozonizer using a pulse power supply.

[0002]

2. Description of the Related Art Ozone has an extremely strong oxidizing power and is used for many purposes such as water and sewage treatment such as sterilization, deodorization and decolorization of water, human waste treatment and sterilization in foods. At present, silent discharge is often used in ozone generators.
This is because it is considered to be most suitable for industrially producing a large amount of ozone. However, the use of pulses obtained by spatially and temporally compressing electric energy makes it possible to produce a higher-concentration and higher-efficiency ozone generator.

FIG. 2 shows a basic configuration of an ozone generator using this pulse. In FIG. 2, a high-voltage electrode 3 is disposed on a coaxial inner periphery of a ground electrode tube 1 made of metal such as stainless steel via a discharge gap 2 (discharge space) having a predetermined width. A high-voltage pulse is applied from the pulse power supply 4 between the ground electrode tube 1 and the high-voltage electrode 3 to cause a discharge,
Ozone is generated by passing a gas (dry air or oxygen) as a raw material through the discharge gap 2. This method is currently performed at the laboratory level and will be commercialized.

[0004]

As described above, in the ozone generator using a pulse, the ground electrode tube 1 is used.
It is necessary to install the high voltage electrode 3 coaxially. At this time, since the high voltage electrode 3 is at a high voltage, it is necessary to pay attention to the fixing method. As a method of fixing the high voltage electrode 3, for example, there is a method of fixing the high voltage electrode 3 inside the ground electrode tube 1 using a Teflon plate. However, this method has a drawback that creeping discharge occurs along the Teflon plate and cannot be efficiently discharged into the discharge gap 2.

The present invention has been made in view of the above points, and an object of the present invention is to prevent an abnormal discharge inside a discharge tube (discharge space) and to generate a uniform discharge to improve ozone generation efficiency. A generator is provided.

[0006]

According to the present invention, a high-voltage electrode is provided in a container body, and a ground electrode tube is disposed around the coaxial outer periphery of the high-voltage electrode via a discharge space. A pulse voltage is applied to the ozone generator to generate ozone in the source gas circulated in the discharge space. (1) Both ends of the high-voltage electrode are electrically connected to two conductive members outside the discharge space in the container body. And each other end of the support member is fixed to the container body via an insulator, and a pulse voltage is applied between the other end of the support member and the ground electrode tube. (2) the high-voltage electrode is fixed by applying a tension capable of equalizing a discharge space by the support member, and (3) the two high-voltage electrodes are fixed. The other end of the support member and the ground A pulse voltage having the same phase is applied between the tubes, and (4) a pulse having the opposite phase or the phase shifted from the other end of each of the two support members and the ground electrode tube. Characterized by applying a voltage,
(5) The conductive support member is formed of a metal plate, and (6) the insulator is formed of an insulator.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the present invention, in order to prevent abnormal discharge inside the discharge tube, high-voltage electrodes are fixed at both ends of the discharge tube as shown in FIG. In FIG. 1A, the same parts as those in FIG. 2 are denoted by the same reference numerals. Supporting members, for example, metal plates 12a and 12b are provided on both ends of the ground electrode tube 1 housed in the container 11, respectively, and both ends of the high voltage electrode 3 are formed by the metal plates 12a and 12b.
It is fixed to insulators 13 a and 13 b provided in the container 11. The high voltage electrode 3 is fixed so that an appropriate tension is applied to the high voltage electrode 3 so that the discharge gap 2 can be made uniform. A pulse voltage is applied to the high voltage electrode 3 from the pulse power supply 4 via the metal plate 12a.

Reference numerals 14a and 14b denote spacers provided between the inner wall of the container and the ground electrode tube 1. Cooling water is passed through a section partitioned by the spacers 14a and 14b to cool the ground electrode tube 1. Things.

In the apparatus constructed as described above, a pulse voltage is applied from the pulse power supply 4 between the ground electrode tube 1 and the high-voltage electrode 3, and the raw material gas, for example, air flows from the air inlet (not shown) to the container 11. And ozone is generated by passing through the discharge gap 2 and the ozone is emitted from an ozone outlet (not shown). Since the metal plates 12a and 12b supporting the high-voltage electrode 3 are disposed outside the discharge gap 2, abnormal discharge between the ground electrode tube 1 and the high-voltage electrode 3 is prevented.

Since the high voltage electrode 3 is provided with an appropriate tension, the discharge gap 2 can be made uniform. As a result, uniform discharge can be generated in the discharge tube, and ozone generation efficiency can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG.
However, as shown in FIG. 1B, the same voltage is applied to both ends of the high-voltage electrode 3 from the pulse power supply 4 via the metal plates 12a and 12b. Is also good. With this configuration, the electric field intensity distribution in the discharge gap 2 can be made uniform, and improvement in ozone generation efficiency can be expected.

Further, as shown in FIG.
A pulse voltage is applied to one end of the high voltage electrode 3 from the pulse power supply 4a via the metal plate 12a.
b, a pulse voltage having a phase opposite to that of the pulsed power supply 4a or a phase shifted from the phase may be applied via the metal plate 12b. With this configuration, the discharge in the discharge gap 2 can be made uniform over time, and an increase in ozone concentration and an improvement in generation efficiency can be expected.

[0013]

As described above, according to the present invention, in the ozone generator, both ends of the high-voltage electrode are fixed to one end of each of the two conductive support members outside the discharge space in the container body. The other end of the support member is fixed to the container body via an insulator, and a pulse voltage is applied between the other end of the support member and the ground electrode tube.
The following excellent effects can be obtained.

(1) According to the first to sixth aspects of the invention, abnormal discharge in the discharge space can be prevented, and the ozone generation efficiency can be improved.

(2) According to the second, fifth and sixth aspects of the present invention, the discharge gap can be made uniform by giving the high voltage electrode an appropriate tension. Therefore, a uniform discharge can be generated in the discharge gap, and the ozone generation efficiency can be improved.

(3) According to the third, fifth and sixth aspects of the present invention, a voltage can be applied from both ends of the high voltage electrode. Therefore, the electric field intensity distribution in the discharge tube can be made uniform, and the ozone generation efficiency can be improved.

(4) According to the fourth, fifth, and sixth aspects of the present invention, the discharge inside the discharge tube can be made uniform over time, and an increase in ozone concentration and an improvement in generation efficiency can be expected.

[Brief description of the drawings]

1 shows an embodiment of the present invention, (a) is a schematic configuration diagram of one embodiment, (b) is a main part circuit diagram of another embodiment, and (c) is a main part circuit of another embodiment. FIG.

FIG. 2 is a configuration diagram schematically illustrating a conventional pulse type ozonizer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ground electrode tube 2 ... Discharge gap 3 ... High voltage electrode 4, 4a, 4b ... Pulse power supply 11 ... Container 12a, 12b ... Metal plate 13a, 13b ... Insulator 14a, 14b ... Spacer

Claims (6)

[Claims] 1. A high-voltage electrode is provided in a container body, and a ground electrode tube is provided around a coaxial outer periphery of the high-voltage electrode via a discharge space,
A pulse voltage is applied between the high-voltage electrode and the ground electrode tube to generate ozone in the source gas circulated in the discharge space. 2
Each of the conductive support members is fixed by one end thereof, and the other end of the support member is fixed to the container body via an insulator, and a pulse voltage is applied between the other end of the support member and the ground electrode tube. An ozone generator characterized in that it is configured to apply a voltage. 2. The ozone generator according to claim 1, wherein the high-voltage electrode is fixed by applying a tension capable of equalizing a discharge space by the support member. 3. The ozone generator according to claim 1, wherein a pulse voltage having the same phase is applied between each of the other ends of the two support members and a ground electrode tube. 4. The pulse voltage according to claim 1, wherein a pulse voltage having an opposite phase or a phase shift is applied between each of the other ends of the two support members and the ground electrode tube. Ozone generator. 5. The device according to claim 1, wherein the conductive support member is made of a metal plate.
An ozone generator according to item 1. 6. The ozone generator according to claim 1, wherein the insulator is made of an insulator.