JPH0274502A - Ozone generator - Google Patents

Abstract

PURPOSE:To provide an ozone generator having a large capacity for reactions and capable of ready handling and generation of highconcentration O3 by using plural conductive wires as anodes, arranging the wires leaving a constant space between respective wires without using a dielectric material between an anode and an opposing cathode. CONSTITUTION:Direct current obtained by rectifying 4 high-tension alternating current boosted to 20-30kV is accumulated in an oil condenser 5. As charge is supplied to a peaking condenser 10, the voltage is forced to be increased. When the voltage reaches the breakdown voltage between electrodes 11 and 12, discharge is started. In this case arcing is hard to occur due to low field strength near the electrodes 12 because the anodes 11 and the cathodes 12 are respectively composed of plural wires and plate electrodes. As the generated positive pulse trimmer discharge is wide discharge along electric lines of force, the efficiency of O3 generation is high. Specifically, the efficiency is so high as about 200g-O3/kwh in an work example of this invention in spite of 60g-O3/ kwh in a conventional O3 generator.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to an ozone generator with an improved discharge electrode.

[Prior Art] Hereinafter, a silent discharge type ozone generator that has been used conventionally will be described with reference to the basic configuration diagram of FIG. 4. (a), (b), and (c) each show different examples, but in all of them, a dielectric material 18 is placed between a high voltage electrode 16 and a ground electrode 17 that face each other with a gap 15 in between, and the high voltage This is a method in which a high AC voltage is applied by a power source 1 between the electrode 16 and the ground 1 pole 17 to generate a silent discharge in the gap 15, and gas containing oxygen is passed through the gap 15 to generate ozone. be.

[Problems to be Solved by the Invention] In the conventional method using silent discharge by applying an AC high voltage as shown in FIG. 4, the dielectric 18 is used to stabilize the discharge, that is, to prevent arc migration.

This means that the applied voltage cannot be increased. Therefore, the sea pole 16
If the distance (gap) 75 between , 17 is made wider than a few millimeters, no discharge will be obtained at low applied voltage, and the reaction volume will be forced to be narrowed, which is not optimal for an industrial-scale device. .

Furthermore, since each electron in the discharge is a random electron generated by the ionization effect of ultraviolet rays and cosmic rays in the atmosphere, it is necessary to increase the electrolytic strength. Therefore, an intense streamer discharge in which positive and negative charges are mixed locally occurs due to overvoltage, and nearly 95 cm of the discharge energy becomes heat, which may become unsuitable for ozone generation.

An object of the present invention is to provide an ozone generator that is easy to handle, has a large reaction volume, and can generate ozone at a high concentration.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention applies a 9 Luss-shaped direct pressure between the cathode 4 poles and the anode' polarization arranged to face each other to generate a positive pulse. causing streamer discharge,
In the ozone generator that generates ozone by completely passing a gas containing oxygen through the gap between the two electrodes, the anode electrode is configured to have a plurality of electrically conductive wires spaced apart from each other. All of these anode electrodes are arranged to face the four cathode electrodes.

[Function] Since the present invention is configured as described above, the dielectric between the 7-node electrode and the cathode electrode, which was required in the conventional ozone generator, can be removed. Therefore, the distance between the electrodes can be widened, and a large capacity and high concentration of ozone gas can be generated.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram of the apparatus of the present invention, and FIGS. 2 and 3 are a perspective view and an electrode arrangement diagram showing the configuration of the electrodes in FIG. 1. This circuit consists of an electrode section and a power supply section, which are constructed as follows.

Electrode Part> The present invention removes the dielectric provided between the anode electrode 1 and the cathode electrode 120 of the conventional ozone generator, and
As shown in the figure (14 formation + g pole JJ, the gap between z2 is enlarged.

A plurality of electrically conductive wires are used as the anode electrode 1) and are arranged at intervals.

<Power supply section> Using one source of high-voltage direct current obtained by boosting the alternating current voltage of the commercial power supply to high voltage using the slider 2 and transformer 3, and rectifying this with the rectifier 4, the peaking capacitor 1 is used.
A high-impedance strainer coil 9 is installed in parallel with 0 to generate a pulsed discharge.

The DC current generated by the rectifier 4 is used to charge an oil capacitor 5 connected in parallel with the rectifier 4 and the transformer 3Vc. A storage capacitor 8 is connected in parallel to the oil capacitor 5.

A self-destruct switch, such as a rotary switch 2, is connected between the storage capacitor 8 and the oil capacitor 5 as a switch for switching charge supply to the capacitor 8.5.

Also, a rectifier 6 is connected between the rectifier 4 and the rotary switch 7.
Connect it. Strain coil 9 is connected to ground 13.

The operation of the ozone generator configured as described above will be explained below.

Apply 200V AC pressure from commercial power supply 1 to Slydac 2.
The high voltage transformer 3 adjusts the voltage to a required voltage level, and further increases the voltage to, for example, 20 to 3 Q kV.

Is the boosted high voltage alternating current rectified? a4 converts it into a direct current, and this direct current is passed through the oil condenser tl--5.
i can be saved. The electric charge stored in this oil capacitor 5 is transferred to a storage capacitor 8 by a rotary switch 7 used as a high voltage and high frequency switch. Eight rectifiers 6 are installed between the oil capacitor 5 and the a-tally switch 7, so that the charge existing in the streno capacitor &1Cfi does not flow back to the oil capacitor 5. Then, the electric charge stored in the storage capacitor 5 is transferred to the rotary switch 7.
peaking capacitor i by switching.

to move to. At the peaking capacitor 10, the voltage increases as the charge transfers, and eventually the electrodes 11 and 12
When a dielectric breakdown voltage of 1 is reached between 1 and 2, positive pulse streamer emission begins. Since this is a positive pulse streamer discharge, the stability of the discharge depends on gas conditions such as flow rate, pressure,
Not affected by impurities etc.

As mentioned above, since the rotary switch 7 is used, rapid opening and closing is possible under high voltage, and a rapid rise in the discharge voltage, which affects ozone generation efficiency, is possible. As the peaking capacitor 77Kf4 load is supplied, the voltage also rises, and when it reaches the dielectric breakdown voltage between electrodes II and 12, discharge begins.

In this case, since the anode electrode ii is composed of a plurality of wires and the cathode electrode 12 is a flat plate electrode as shown in FIG. Hateful. Since the generated positive pulse streamer discharge is a wide discharge along the lines of electric force, the ozone generation efficiency is also high. Specifically, in the conventional silent discharge type ozone generator, the output was 60 g-OyAKwh, but in the embodiment of the present invention, the output was approximately 200 soOs/Os/
Very expensive kwh.

In addition, the distance between the poles II and 12 is larger than that of the conventional silent discharge method.Specifically, the distance between the poles II and 12 can be increased from 1 to 2 meters with the conventional device to 10 to 20 meters with the device of the present invention.
In addition, if the pitch of the anode electrodes 11 is set to 10 m or more, an infinite number of anode electrodes 11 can be installed, which makes it possible to flow a large amount of gas, and since the anode electrode 1) is installed in the center of the flow path, It is also expected that the electrode 11.
Thermal decomposition due to temperature rise in 12 can be prevented.

Regarding the residual charge after discharge, since the strainer coil 9 is connected in parallel with the peaking capacitor 10, the loss in the 11!1 path can be reduced compared to the 11 resistor installation method.

In the above embodiment, a flat cathode electrode 12Vi was used as shown in FIG. 3(a), but even if the cathode electrode has a substantially elliptical cross section as shown in FIG. 3(b), Effects similar to those of the embodiment can be obtained. In addition, (14 in Figure 3 is dry air.

[Effects of the Invention] According to the present invention as described above, the ozone generation efficiency is much higher than that of the conventional silent discharge method V, and since it is a positive/zerus streamer discharge, the stability of the discharge is not affected by gas conditions. ,
Furthermore, since the distance between the electrodes can be made wider than in the conventional silent discharge method, an ozone generator can be obtained that is easy to handle, has a large reaction volume, and can generate high-concentration ozone.

[Brief explanation of the drawing]

FIG. 1 is an inspiratory circuit diagram showing an embodiment of the ozone generator according to the present invention, FIG. 2 is a perspective view showing the configuration of the electrodes in FIG. 1, and FIG. 3 is the electrode arrangement diagram in FIG. FIG. 4 is a basic configuration diagram of a silent discharge method of a conventional ozone generator. 11-zunotese autumn, 1λ, zuuntouseminatok. (a) (b) Figure 3 Applicant's agent Patent attorney Takehiko Suzue Figure 4

Claims (1)

[Claims] Ozone generation in which a pulsed voltage is applied between a cathode electrode and an anode electrode arranged to face each other to generate a positive pulse streamer discharge, and a gas containing oxygen is passed through the gap between the two electrodes to generate ozone. In the device, a plurality of electrically conductive wires are used as the anode electrodes and are spaced apart from each other, and these anode electrodes are arranged opposite to the cathode electrode, and the anode electrodes An ozone generator characterized in that a dielectric provided between cathode electrodes is removed.