JPH01290503A - Ozone reactor - Google Patents

Abstract

PURPOSE:To reduce an electric capacity and the loss in a high-frequency transformation of electric power by fitting a cylindrical induction electrode on the center part of outer peripheral surface of a solid dielectric pipe member, and disposing plural number of thin wire discharge electrodes along the circular surface of the pipe member. CONSTITUTION:The cylindrical induction electrode 2 is fitted and fixed on the center part of outer peripheral surface of the pipe member 1 of a solid dielectric body, such as heat-resistant glass, fluororesin or ceramics. One or plural fine wire discharge electrodes 3 consisting of stainless steel or tungsten, etc., are disposed along the inner peripheral surface of the pipe member 1. The induction electrode 2 and the discharge electrode 3 are connected with AC electric power source 5 through conductors 4. When AC high voltage is impressed to the electrodes 2, 3, the electric field of the induction electrode 2 is averaged by the pipe member 1 and a strong streamer corona discharge is generated in the inner space of the pipe member 1 because the discharge electrodes 2 are fine wires, and at the same time, a surface discharge is generated in the inner space near the pipe member 1, so that the oxygen flowing in the inner part of the pipe member 1 is efficiently ozonized.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an ozone reactor, and particularly relates to an ozone reactor that generates ozone, which is used as a particularly strong oxidizing agent for sterilization, deodorization, decolorization, etc., from oxygen by electrical discharge. Regarding the handy ozone reactor.

[Conventional technology]

As the ozone reactor in the conventional ozone generator, there are a silent discharge method, a creeping discharge method, and a streamer corona discharge method, and various types have been proposed.

In the silent discharge method, as shown in Figure 3,
Poles a + b are placed facing each other with a predetermined gap 1 in between, and a silent discharge is generated by applying an AC high voltage from a power source d to electrodes a and b via a dielectric C placed within this gap f. It is something.

In addition, in the creeping discharge method, as shown in Fig. 4, a discharge electrode a is provided on the front surface of a dielectric material C, and an induction electrode is provided on the back surface of the dielectric material C, and a high AC voltage is applied from a power source d to This causes creeping discharge.

Furthermore, in the streamer corona discharge method, as shown in Fig. 5, a high AC voltage is applied from a power source d between the discharge ff1a and the induction lightning 'If4b, and a streamer corona discharge is generated from the discharge pole a. . In this case, a dielectric C may be interposed as shown in the figure.

[Problem to be solved by the invention]

However, the silent discharge method requires a large applied voltage, and in order to reduce this, it is necessary to make the gap j (gap) between the dielectric C and the electric current as small as possible with high dimensional accuracy. It is not easy to use, and the capacitance is large, so it generates a lot of heat, and
There is a problem in that power loss due to high frequency is large.

In addition, in the creeping discharge method, the electric field tends to concentrate locally and the average electric field is low.
It is necessary to round it to 0.5 m/m or more so that it is not sharp, and in addition, there are problems such as the capacitance is large and the amount of heat generated by the dielectric is extremely large.

Furthermore, the streamer corona discharge method has the same problems as the silent discharge method, such as the large applied voltage.

In view of the above points, this invention has been developed to reduce capacitance and reduce loss when the power frequency is increased, and at the same time, it is small and easy to assemble, and has high performance that can efficiently generate ozone from oxygen. The purpose of this invention is to provide an ozone reactor in an ozone generator.

[Means for solving the problem] In order to solve the problem of the above-mentioned conventional technology, this invention is as follows.
A cylindrical induction electrode is fitted near the axial center of the outer peripheral surface of a tube member as a solid dielectric, and one or more thin wire-shaped discharge electrodes are arranged along the inner peripheral surface of the tube member. The device is characterized in that each of the electrodes is connected to a power source.

[For production]

When an AC high voltage is applied to the induction electrode on the outer periphery and the discharge electrode on the inner periphery of the tube member, the electric field of the discharge electrode is averaged by the tube member as a solid dielectric. In addition, since the discharge electrode is a thin wire, a strong streamer corona discharge occurs in the inner space of the tube member, and at the same time, a creeping discharge occurs in the vicinity of the tube member, which makes it possible to efficiently control the oxygen flowing inside the tube member. Can be easily ozonated.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 and 2.

The tube member 1 as a solid dielectric is made of heat-resistant glass, fluorine-based resin, ceramic, PVC, etc. A cylindrical induction electrode 2 having a diameter is fixedly fitted onto the outside.

The induction electrode 2 is made of a conductive material such as a copper plate, an aluminum plate, or a stainless steel plate.

Inside the pipe member 1, one or more discharge electrodes 3.3 are disposed along the inner peripheral surface of the pipe member 1 along the entire length of the pipe member 1, and the discharge electrodes 3.3 is made of stainless steel, tungsten, etc., and its radius is 0.
It is formed into an extremely thin wire shape of 0.05 m/m or less.

The induction electrode 2 and the discharge electrodes 3, 3 are connected to an AC power source 5 via conductive wires 4.4, and the wiring is arranged so that an AC high voltage can be applied to these electrodes 2, 3. be done.

Therefore, when a high AC voltage is applied from the power source 5 to the induction electrode 2 and the discharge electrode 3.3, the electric field of the induction electrode 2 is made equal by the tube member 1 as a solid dielectric. Furthermore, since the discharge 1f13.3 is an extremely thin wire with a radius of 0.0511 mm or less, a strong streamer corona discharge occurs in the space inside the tube member 1, and at the same time, the discharge electrode 3 is connected to the inner peripheral surface of the tube member 1. Creeping discharge occurs in areas close to. As a result, the capacitance is small, and less power is required for increasing the frequency of the power supply.

〔Effect of the invention〕

As explained above, according to the present invention, the discharge electrode is an extremely thin wire electrode, and this is arranged along the inner peripheral surface of the tube member as a solid dielectric, which causes problems in creeping discharge. The local concentration of the electric field is reduced and the applied voltage can be made as low as creeping discharge. Furthermore, since the streamer corona discharge and the creeping discharge occur simultaneously, the ozone generation efficiency is high, and the capacitance can be reduced to 1150 compared to the silent discharge method and 1/10 compared to the creeping discharge method. Since the inside of the tube member, which is a solid dielectric, also serves as an air flow path, there is no need for a case, and the ozone reactor can be made smaller, and the dimensional accuracy can be rough, so it can be provided at a low price. be able to. In addition, since the voltage required for increasing the frequency is small, the power supply device is also small and inexpensive, and since the capacitance can be made small, power loss is small even when the frequency is increased.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view showing one embodiment of the present invention, FIG. 2 is a sectional view corresponding to the line A-A in FIG. 4 is an explanatory diagram showing a silent discharge method, FIG. 4 is a creeping discharge method, and FIG. 5 is a streamer corona discharge method. DESCRIPTION OF SYMBOLS 1... Pipe member as a solid dielectric, 2... Induction electrode, 3... Discharge electrode, 5... AC power supply. Applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] A cylindrical induction electrode is fitted near the axial center of the outer peripheral surface of a tube member as a solid dielectric, and one or more thin wire-shaped discharge electrodes are arranged along the inner peripheral surface of the tube member. An ozone reactor characterized in that each of the electrodes is connected to a power source.