JP2009114001A - Ozone generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an underwater discharge length larger as well as to set the distance of a discharge space with high accuracy by easy distance adjustment of a gap which becomes a discharge space, so that uniform stable discharge can be achieved and capacity can easily be made larger through easy connection. <P>SOLUTION: This ozone generator comprises a cylindrical ground electrode 1, a high-voltage electrode 2 disposed inside the ground electrode 1, a gap support 4 forming a gap which becomes a generation space 3 between the ground electrode 1 and the high-voltage electrode 2, and insulating layers 5a, 5b formed on the electrode surfaces of the ground electrode 1 and the high-voltage electrode 2. Water in which oxygen-containing gas is dispersed as bubbles is supplied to the generation space 3 and discharge is caused in the underwater bubbles present in the generation space 3 by applying a voltage between the ground electrode 1 and the high-voltage electrode 2 to generate ozone gas and ozone water. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ozone generator that generates ozonized gas and ozone water by discharging in a bubble in water or in a partial air layer that flows and moves in a discharge space.

  Conventionally, in water and sewage treatment facilities, chemical factories, pharmaceutical factories, food factories, etc., sterilization of viruses, bacteria, molds and yeasts, deodorization of odorous substances such as aldehydes, sulfur compounds, nitrogen compounds, human waste and dye waste liquids Ozone generators are used to decolorize and detoxify harmful substances such as organic solvents.

FIG. 5 is a conceptual diagram of a silent discharge ozone generator.
The silent discharge type ozone generator shown in the figure has a configuration in which an insulating layer 32 made of a dielectric is disposed on one surface of opposing flat metal electrodes 31a and 31b. The metal electrodes 31a and 31b are connected to an AC high voltage power source 33, and a discharge column of a silent discharge 35 is formed in a discharge space 34 formed by the opposing metal electrodes 31a and 31b and a dielectric insulating layer 32. Is done.

  By supplying the source gas 36 containing oxygen to the discharge space 34, electrons generated by the discharge column of the silent discharge 35 collide with oxygen molecules, and after dissociating into oxygen atoms, they are combined with undissociated oxygen molecules. Ozonized gas is generated.

  FIG. 6 is a schematic view of a cylindrical electrode type ozone generator using a cylindrical electrode as one of silent discharge type ozone generators. The electrode structure of the cylindrical electrode type ozone generator basically has a form in which a flat plate is replaced with a cylinder. In FIG. 6, a cylindrical ground electrode 37 and a high voltage electrode 39 on which an insulating layer 38 is formed are provided as electrodes corresponding to the flat metal electrodes 31a and 31b in FIG. Although not clearly shown in the drawing, the ozone generator shown in FIG. 6 has a device for cooling the electrode added to one or both of the outer peripheral surface of the ground electrode 37 and the inner peripheral surface of the high-voltage electrode 39. is doing.

  These ozone generators apply an alternating high voltage between the electrodes (31a, 31b) and (37, 39) arranged in parallel, supply a gas containing oxygen to the discharge space 34, and generate silent discharge. To generate ozone. Generated ozonized gas is directly injected into raw water and sewage treated water, etc., and used for sterilization, decolorization, deodorization, and detoxification of harmful substances. In addition, this ozonized gas can be dissolved in water and used for cleaning and sterilization of medical devices and foods.

  On the other hand, an underwater bubble generation type ozone generator has been proposed in which a source gas containing oxygen in water is bubbled and discharged in the bubbles to generate ozonized gas and ozone water (see, for example, Patent Documents 1 and 2). ).

  FIG. 7 is a conceptual diagram of an underwater bubble generating ozone generator using a planar electrode. This apparatus arranges parallel metal electrodes 42a and 42b in a container 41, fills the container 41 with raw water 43, and introduces a source gas 44 containing oxygen from the lower part between the metal electrodes 42a and 42b. To do. The source gas 44 is a minute bubble 46 supplied from a bubble generator 45 installed below the metal electrodes 42a and 42b, and rises between the metal electrodes 42a and 42b.

  In the underwater bubble generating ozone generator, an alternating high voltage is applied from a high voltage power supply 47 between the metal electrodes 42a and 42b. This voltage is applied to the electrode resistance direction of the bubble diameter of the source gas bubble 46 containing oxygen via water in the container 41 by a sine wave or a pulse wave. As a result, discharge occurs in the bubbles, electrons collide with oxygen molecules in the bubbles, dissociate into oxygen atoms, and combine with other oxygen molecules to generate ozonized gas. Moreover, this ozonized gas melt | dissolves in water and ozone water is produced | generated. The generated ozonized gas and ozone water are taken out from the outlet 48.

  In the underwater bubble generation type ozone generator, by narrowing the distance between the metal electrodes 42a and 42b, a high voltage can be applied to bubbles in the water between the electrodes, and the ozone generation efficiency can be increased. Alternatively, the applied voltage can be lowered while maintaining the ozone generation efficiency.

  Further, an ozone generator that can be discharged at a low applied voltage by using two or more types of media having different insulation coefficients has been proposed (see, for example, Patent Document 3).

  FIG. 8 is a block diagram of an ozone generator described in Patent Document 3. In this ozone generator, a pair of planar electrodes 51a and 51b are disposed in the underwater discharge section 50, and the opposing surfaces of the planar electrodes 51a and 51b are insulated by insulators 52a and 52b. Then, two interfaces of ion-removed water 53 (water layer) and air 54 (gas layer) are formed between the planar electrodes 51a and 51b.

In the ozone generator, when a voltage is applied to the mixed medium of the ion-removed water 53 and the air 54 by the planar electrodes 51a and 51b, the electric field EA formed in the air 54 becomes larger than when the medium is only air. Even if a low potential is applied, the battery is easily discharged.
JP 2001-9463 A Japanese Patent Laid-Open No. 2001-10808 Special table 2005-502456 gazette

  However, the underwater bubble generation type ozone generators described in Patent Documents 1 and 2 are provided with electrodes inside or outside the tank wall surface, so the distance between the electrodes is long, oxygen in the bubbles in the treated water, etc. In order to discharge the gas in a gas containing a high applied voltage.

  Moreover, since the underwater bubble generation type ozone generator shown in FIG. 7 has a structure for generating ozonized gas and ozone water in a container, it treats a large amount of water using tap water or industrial water as raw water. I couldn't. Moreover, since the resistance values of these raw waters are unstable and low, the electrolytic corrosion of the electrodes is increased, and the consumption of the electrodes and the purity of generated ozone and ozone water are lowered. In addition, the withstand voltage and insulation resistance in water decrease, leakage current in water increases, loss increases and discharge decreases, resulting in decreased ozone generation, short circuit between electrodes, and bumping due to rapid temperature rise. There is a fear.

  Moreover, since the ozone generator of FIG. 7 and patent document 3 is an opposing plane electrode structure of a plane electrode, it was difficult to obtain uniform stable discharge. The underwater discharge part 50 of Patent Document 3 is a discharge space structure formed by parallel electrodes, and there are two layers, an aqueous layer containing fine oxygen bubbles and a gas layer, between the insulated electrodes. If the layer thickness (void) is not maintained at a uniform distance, the discharge is not stable. In order to discharge efficiently and stably in the discharge space where ozone is generated, a narrow space with a distance of 1 mm or less is required. However, in the opposed planar electrode structure of planar electrodes as in Patent Document 3, these discharge spaces cannot be maintained unless the level is maintained with high accuracy. Further, when the amount of water injected into the underwater discharge unit 50 increases, the water surface fluctuates, and the liquid level cannot be kept constant. The same applies to air (including oxygen). Therefore, a configuration that can be increased in size is not required with respect to the vibration, inclination, and increase in air volume of the apparatus.

  The present invention has been made in view of the above point, and it is easy to adjust the gap distance as a discharge space, and the distance of the discharge space can be set with high accuracy, and the underwater discharge length can be increased to obtain a uniform stable discharge. It is an object of the present invention to provide an ozone generator that can be easily connected and has an excellent capacity.

  The ozone generator according to the present invention includes a cylindrical ground electrode, a high-voltage electrode disposed inside the ground electrode, and a spacer that forms a gap serving as a discharge space between the ground electrode and the high-voltage electrode. And an insulating layer formed on the surface of one or both of the ground electrode and the high-voltage electrode forming the discharge space, and supplying water in which oxygen-containing gas is dispersed in the discharge space A voltage is applied between the ground electrode and the high-voltage electrode to convert bubbles present in the discharge space into ozonized gas, thereby generating ozone water.

  According to this configuration, by applying a voltage between the ground electrode and the high-voltage electrode, partial movement of the discharge space in the discharge space or in the discharge space due to the concentration of a large amount of bubbles or large bubbles is caused. In addition, it is possible to generate an ozonized gas or ozone water by discharging at a location that is an air layer and changing to an ozonized gas. Since the high-voltage electrode is disposed inside the cylindrical ground electrode and the discharge space is formed via the spacer, the discharge / voltage application space can be configured by the structural gap, and the discharge space can be fixed. In addition, there is no restriction on the installation position and orientation of the ozone generator, and the ozone generator can be connected. Therefore, it is possible to easily realize large capacity and large size. In addition, since water containing bubbles is formed in a discharge space formed by a cylindrical gap, a high voltage is applied to the bubbles via the water, and discharge and ozone can be generated in the bubbles. No discharge space of two layers of water layer and gas layer as in FIG. 3, and discharge and ozone generation only in the bubbles can be realized.

  Further, since the discharge space is formed by arranging the high voltage electrode inside the cylindrical ground electrode, the distance between the electrodes can be easily set to a short distance by using the spacer. Therefore, since the voltage (electric field strength) applied to the bubbles in water is increased, the energy distribution of electrons is increased, and the generated ozone concentration can be increased. In addition, a relatively low voltage is applied to water dispersed in bubbles containing oxygen gas flowing in the discharge space, so that the ozonized gas and ozone water can be obtained efficiently.

  Moreover, stable ozone generation can be realized by covering both the ground electrode and the high-voltage electrode or the surface of one side with an insulating layer. For example, as shown in FIG. 4A, when the bubble dispersed water bubbles in the discharge space (generation space 3) have a bubble diameter across the electrodes, a gap 13 is generated between the electrodes. By covering the surface with an insulating layer, it is possible to prevent the occurrence of overcurrent such as spark discharge 14 (FIG. 4B) by the insulating layer even if the bubble has a bubble diameter spanning the electrode.

  In the above ozone generator, the insulating layer is preferably made of a ceramic material or a metal oxide inorganic material. By forming an insulating layer on the ground electrode and / or high-voltage electrode in water, the contact between the electrode surface (metal) and water is eliminated, and surface erosion due to water contact or partial discharge on the metal surface can be prevented, and the eluted metal Problems such as a decrease in purity of ozone gas and ozone water caused by ions and fine particles and contamination of impurities can be eliminated, and the life of the electrode can be maintained for a long time. In addition, by covering the ground electrode and / or the high voltage electrode with an insulating layer serving as a surface protective layer, the insulating layer becomes higher than the resistance in water on the coated surface, and a high voltage can be applied even when the supplied water has a low insulating resistance. Can be applied.

  The ozone generator can be configured to apply a high-frequency voltage as an applied voltage between the ground electrode and the high-voltage electrode, and the voltage waveform can be a sine wave, a pulse wave, or a sawtooth wave.

Furthermore, the gas separation that separates the ozonized gas and the ozone water by passing the ozonized gas and the ozone water generated from the ozone generator by applying the voltage through the ejector pump to enhance the dissolution of the ozonized gas. If the ozonized gas separated by the gas separator is returned to the ejector pump through the circulation path and the ozonized gas is dissolved again, the production rate of ozone water can be increased.
Further, the present invention is characterized in that, in the ozone generator, water supplied to the discharge space is cooled, and heat generated by generation of ozonized gas and ozone water is cooled.

  With this configuration, the water supplied to the ozone generator is cooled, so that the ozone generation efficiency can be increased, and the outer and inner cooling portions attached to the ground electrode and the high-voltage electrode are not required. It can be simplified and reduced in weight.

  Further, the present invention is characterized in that in the above ozone generator, untreated water containing an organic substance or an odorous substance is mixed into raw water and supplied to the discharge space.

  With this configuration, by mixing untreated water containing organic substances and odorous substances in the raw water, the organic substances and odorous substances in the raw water are continuously rendered harmless by ozone and ozone water generated in the raw water. be able to.

  According to the present invention, the gap of the discharge space can be easily adjusted, the distance of the discharge space can be set with high accuracy, the discharge length in water can be increased, and a uniform and stable discharge can be obtained. An ozone generator excellent in capacity can be provided.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a conceptual diagram of an ozone generator according to an embodiment, and FIG. 2 is a configuration diagram of a system for processing using the ozone generator shown in FIG.

  As shown in FIG. 1, the ozone generator according to the present embodiment has a high voltage electrode 2 disposed in an internal space of a cylindrical ground electrode 1, and an inner wall surface of the ground electrode 1 and an outer peripheral surface of the high voltage electrode 2. An appropriate generation space 3 is formed between the gap supports 4 as spacers. Insulating layers 5a and 5b are formed on the opposing surfaces of the ground electrode 1 and the high-voltage electrode 2, respectively. A high voltage power supply 6 generates a high frequency or high voltage pulse applied between the ground electrode 1 and the high voltage electrode 2. One electrode of the high voltage power supply 6 is connected to the ground electrode 1, and the other electrode is connected to the high voltage electrode 2 through an insulating terminal 7 provided on the ground electrode 1. The lower surface of the cylindrical ground electrode 1 is provided with a supply port 8 for supplying water in which oxygen-containing gas is dispersed into the generation space 3. The upper surface of the ground electrode 1 is an outlet for discharging ozonized gas and ozone water. 9 is provided.

  The insulating layers 5a and 5b are desirably formed of a uniform insulator having high insulating characteristics for applying a high voltage and having excellent voltage resistance. Moreover, in order to make the insulating layers 5a and 5b function as surface protective layers for the ground electrode 1 and the high-voltage electrode 2, there is no elution or deterioration of ions from the electrode material to water, and there is high resistance from insulation. It is necessary to form a uniform layer without holes. In addition, it is required to have high adhesion to the metal surface, match the thermal expansion coefficient, and not crack or peel off against changes in heat resistance and temperature resistance. In order to meet such a requirement, the insulating layers 5a and 5b may be composed of a plurality of layers. The effects of the present invention can also be obtained by forming the insulating layers 5a and 5b on either the ground electrode 1 or the high voltage electrode 2.

  As the raw tube metal material of the ground electrode 1 and the high-voltage electrode 2, stainless steel or iron, iron-nickel material, aluminum material which is non-rust steel can be used. Insulating layers 5a and 5b are formed on the outer peripheral surface. For example, the inner peripheral surface and the high-voltage electrode of the ground electrode 1 using an oxide mainly composed of alumina, silica, calcium, magnesium, titanium, barium, and zirconia as an oxide compound containing sodium, potassium, lithium, and boron as solvents. 2 is coated and densified to form uniform insulating layers 5a and 5b having excellent withstand voltage.

  Specific materials for the insulating layers 5a and 5b include ceramic materials such as alumina, mullite, and steatite, glass materials such as borosilicate glass and soda lime glass, and enamel materials including silica, sodium, and potassium. Is selected depending on the heat resistance, thermal expansion coefficient, and thickness of the film to be formed.

  As a method for forming the insulating layers 5a and 5b, a method of spraying an oxide compound or an inorganic compound of an oxide compound on a surface of an electrode using a high-temperature burner or discharge, or spraying a slurry dispersed in an organic solvent, There is a method of applying to a thickness of about 100 to 1000 μm by spinner coating, brushing, dipping, screen printing, etc., and sintering at 500 ° C. or higher in a high temperature sintering furnace.

  In order to enhance the adhesion between the metal surface and the inorganic compound, the base metal surface is roughened by blasting or the like as necessary, or the metal surface is solidly used as a base material before forming the insulating layers 5a and 5b. An oxide film layer, metal plating, or the like can be formed.

  In forming the insulating layers 5a and 5b, the insulating layers 5a and 5b are repeatedly formed several times in order to obtain a required film thickness and a required withstand voltage as the insulating layers 5a and 5b.

FIG. 2 is a system configuration diagram for processing using the present ozone generator.
In the treatment system shown in the figure, after the raw water 21 is cooled by the cooler 22, the raw water 21 is supplied from the gas supply device 23 to the bubble generator 24 to which oxygen and a gas containing oxygen or air gas are supplied. The bubble generator 24 includes a mechanism for generating bubbles in water, such as an air diffuser, an ultrasonic vibrator, or a rotary splash disperser. Air bubbles are diffused into the raw water by the bubble generator 24 to generate bubbles of 100 μm or less in the water. When the bubbles are large, buoyancy is generated, and the bubbles gather in the apparatus, become large bubbles, do not disperse in water, and do not flow uniformly in the ozone apparatus along the flow of water.

  The raw water dispersed in bubbles as described above is supplied to the ozone generator 25. The ozone generator 25 has a configuration shown in FIG. A high-voltage power supply 6 provided by the high-voltage power supply device 26 is applied to the ozone generator 25 between the ground electrode 1 and the high-voltage electrode 2, for example, a sine wave AC high voltage 4 kV to 20 kV of 400 to 10 kHz. The voltage applied between the electrodes may be a pulse wave, a sawtooth wave or the like in addition to the sine wave.

  A voltage is applied to the water in the generation space 3 via the insulating layers 5 a and 5 b of the ground electrode 1 and the high-voltage electrode 2. There are bubbles in the water, a voltage is applied to both ends of the bubbles in the water, and discharge occurs in the gas containing oxygen and oxygen in the bubbles. Due to the discharge in the bubbles, some of the oxygen molecules are ionized and further combined with the oxygen molecules, generating ozone. In addition, ozone in the bubbles in the raw water dissolves in the water and becomes ozone water. In this way, ozonized gas and ozone water are generated. Ozonized gas and ozone water are detoxified by oxidizing and decomposing color and odor components and harmful substances contained in water. Water detoxified with ozonized gas and ozone water is discharged from the ozone generator 25.

  The water discharged from the ozone generator 25 is further subjected to gas-liquid mixing of the ozonized gas and water by the ejector pump 30. Thereafter, the gas is introduced into the gas separator 27 where it is separated into a gas containing ozone and water. The water separated by the gas separator 27 is discharged from the discharge port 28 as treated water and reused or discharged. On the other hand, the ozonized gas separated by the gas separator 27 is detoxified by the waste ozone treatment device 29, and then reused or released into the atmosphere as oxygen or air. Further, when the ozonized gas separated by the gas separator 27 is recovered, returned to the ejector pump 30 through the circulation path, and mixed again with gas and liquid, the production rate of ozone water can be increased.

  In the present embodiment configured as described above, the insulating layers 5a and 5b are formed by applying and baking various ceramic materials or metal oxide inorganic substances on the ground electrode 1 and the high-voltage electrode 2 in water, or by thermal spraying. This eliminates contact between the electrode surface (metal) and water, eliminates surface erosion due to water contact or partial discharge on the metal surface, reduces purity of ozonized gas and ozone water due to eluting metal ions and fine particles, and mixes impurities. Defects can be eliminated and the life of the electrode can be maintained for a long time. In addition, by covering the ground electrode 1 and the high voltage electrode 2 with insulating layers 5a and 5b serving as surface protective layers, the insulating layer can be maintained higher than the resistance in water on the covering surface, so that the insulation resistance of the supplied water is A high voltage can be applied even when the voltage is low.

  In order to improve the generation of ozone, it is necessary to increase the voltage applied to the bubbles. As this method, there are a method of increasing the voltage applied to the electrode and a method of increasing the discharge power in the bubbles by bringing the electrode closer. However, if you simply increase the applied voltage or bring the electrodes closer together, the voltage will be higher than the breakdown voltage of the water, and between the metal electrodes that do not cover the insulating layer, a discharge will occur between the electrodes in the water, causing a short circuit. Occurs.

  As in the present embodiment, by using the electrodes in which the insulating layers 5a and 5b are formed on the surfaces of the ground electrode 1 and the high voltage electrode 2, the breakdown voltage of the insulating layers 5a and 5b of the ground electrode 1 and the high voltage electrode 2 can be reduced. Can be higher than the breakdown voltage. FIG. 4B shows the distance between the electrodes in the generation space 3 that was 5 to 10 mm in the conventional apparatus, and the distance between the electrodes in the generation space 3 in the present embodiment was reduced to 0.3 to 1 mm. It was confirmed that a stable high voltage could be applied without generating a spark discharge 14 or an overcurrent due to a discharge even when such a gap 13 straddling the generation space 3 was generated. Moreover, if the voltage applied to the electrode is the same applied voltage, the electrode can be brought closer to that of the conventional device. Therefore, the voltage applied to the bubbles can be increased, and the ozone generation efficiency can be improved.

  Furthermore, high-resistance water is generally used as the raw water 21 used for the ozone generator, but the applied voltage cannot be stably maintained because the resistance of the water is not stable. In the ozone generator according to the present embodiment, the inner peripheral surface of the ground electrode 1 and the outer peripheral surface of the high-voltage electrode 2 are covered with a dense insulating layer 5a, 5b having excellent withstand voltage, such as a ceramic material, Since it is maintained in an insulating state, if it is raw water that shows a resistance value of 2 MΩ · cm or more, ozone generation and ozone treatment of harmful substances in the raw water can be performed simultaneously and efficiently even with low ozone generation. did it. The raw water here is not limited to water having a high resistance value. For example, water showing a resistance value of 2 MΩ · cm or less, water showing an ionic conductivity contained in Na, K, and Cl ions, and salts. Even water with low resistance value can generate ozone and treat ozone with harmful substances in water.

  Therefore, as a detoxification treatment of raw material water containing harmful substances, ozonized gas and ozone water were directly generated in the water, and detoxification treatment of harmful substances such as sterilization, decolorization, and deodorization was possible.

  Further, according to the present embodiment, the high voltage electrode 2 is arranged inside the cylindrical ground electrode 1 and the generation space 3 is formed by the gap support 4, so that the discharge / voltage application space is configured by the structural gap. And the discharge space can be fixed. In this embodiment, the discharge gap is determined by the inner and outer dimensions of the ground electrode 1 and the high-voltage electrode 2, and the discharge gap distance is maintained by the gap support 4 that is a spacer provided on the surface of the high-voltage electrode 2. The Therefore, if the gap support 4 and the tube dimensions are determined, a fixed generation space can be obtained by inserting the high voltage electrode 2 with the gap support 4 installed into the ground electrode 1.

  Further, the insulation between the ground electrode 1 and the high voltage electrode 2 is easily ensured by increasing the distance between the insulating layer 5a in the ground electrode 1 or the insulating layer 5b provided on the surface layer of the high voltage electrode 2. Insulation can be ensured without providing a complicated insulation structure.

  Further, in the cylindrical electrode structure (the ground electrode 1 and the high voltage electrode 2), when the electrode is soiled and a defect of the electrode tube occurs, the high voltage electrode 2 can be taken out and easily cleaned or replaced. If the ground electrode 1 is mounted and fixed using a flange structure, the ground electrode 1 can be easily replaced.

  In addition, according to the present embodiment, each electrode pair composed of the ground electrode 1 and the high-voltage electrode 2 is added in parallel or connected in series, thereby generating ozonized gas and ozone water and harmful substances in the water. The ability to detoxify can be increased. Furthermore, by operating these ozone generators in parallel, it becomes possible to generate more ozone and ozone water and to detoxify harmful substances in the treated water.

  In addition, according to the present embodiment, the direction of the ozone generator can be arbitrarily changed, and even if a large amount of bubbles gather in the vertical position shown in FIG. 1 and a large bubble or gas space is generated in the generator, These bubbles rise due to the flow and buoyancy of the liquid and can be easily discharged out of the generator, so that the discharge for generating ozone can be kept stable.

  Moreover, in this Embodiment, since the raw | natural water 21 supplied to the ozone generator 25 is cooled with the cooler 22, ozone generation efficiency can be raised. In addition, the outer peripheral part and the inner peripheral cooling part attached to the ground electrode 1 and the high voltage electrode 2 are not required, and the structure can be simplified and reduced in weight. In the conventional silent discharge type ozone generator, in order to increase the ozone generation efficiency, it was necessary to add a cooling part for cooling the outer periphery of the ground electrode and the inside of the high-voltage electrode in the periphery of the electrode and the cylindrical type. .

  Moreover, in the ozone generator which concerns on the said one embodiment, as raw water, such as tap water or pure water supplied to the ozone generator 25, supplies untreated water containing harmful substances such as organic substances and odorous substances Also good.

  In this way, by mixing untreated water containing harmful substances such as organic substances and odorous substances into the raw water, the harmful substances in the raw water are continuously detoxified by ozone and ozone water generated in the raw water. can do. In conventional water treatment with ozonized gas and ozone ionized water, the ozonized gas and ozone water are generated by an ozone generator, and the generated ozonized gas and ozone water are injected into the raw water to be treated for decomposition / Since it was oxidized and rendered harmless, the treatment process was complicated and took a long time.

FIG. 3 is a structural diagram of a modified example in which electrode pairs including a ground electrode and a high-voltage electrode are added in parallel.
As shown in the figure, a cylindrical outer ground electrode 1 a having the same outer diameter as the inner diameter of the container 11 is installed along the inner wall of the cylindrical container 11. Inside the cylindrical outer ground electrode 1a, a cylindrical outer high-voltage electrode 2a is disposed through a gap formed between the outer ground electrode 1a and the outer cylindrical ground electrode 1a. Further, a cylindrical inner ground electrode 1b is disposed inside the outer high-voltage electrode 2a via a gap formed between the outer high-voltage electrode 2a and the inner ground electrode 1b is connected to the inner ground electrode 1b. A cylindrical inner high voltage electrode 2b is arranged through a gap formed therebetween.

  A gap support (not shown) is provided between the outer ground electrode 1a and the outer high-voltage electrode 2a and between the outer high-voltage electrode 2a and the inner ground electrode 1b. Similarly, a gap support (not shown) is provided between the inner ground electrode 1b and the inner high-voltage electrode 2b. Further, an insulating layer (not shown) is formed on both or one of the outer ground electrode 1a and the outer high-voltage electrode 2a facing each other, and is also shown on both surfaces or one surface of the outer high-voltage electrode 2a and the inner ground electrode 1b facing each other. An insulating layer is not formed. Further, an insulating layer (not shown) is formed on both or one of the opposing surfaces of the inner ground electrode 1b and the inner high-voltage electrode 2b.

  The outer high voltage electrode 2 a and the inner high voltage electrode 2 b are connected to a high voltage power supply 6 through a high voltage terminal 12. A supply port 8 is provided on the bottom surface of the container 11 to supply the raw water dispersed in bubbles into the container 11, and an outlet 9 is provided on the top surface of the container 11 for extracting gas and raw water.

  Also in the ozone generator configured as described above, the same operational effects as those of the above-described embodiment can be obtained, and the processing capability can be further enhanced.

Schematic diagram of ozone generator according to one embodiment Configuration diagram of a processing system using the ozone generator shown in FIG. Configuration diagram of a modified example in which an electrode pair consisting of a ground electrode and a high-voltage electrode is added in parallel (A) Schematic diagram in the case of a bubble diameter spanning an electrode provided with an insulating layer, (b) Schematic diagram in the case of a bubble diameter spanning an electrode not provided with an insulating layer Conceptual diagram of conventional silent discharge ozone generator Schematic diagram of a conventional cylindrical electrode type ozone generator using a cylindrical electrode Conceptual diagram of an underwater bubble generation type ozone generator using a conventional flat electrode Configuration diagram of a conventional ozone generator with two interfaces in the underwater discharge section

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ground electrode, 2 ... High voltage electrode, 3 ... Production space, 4 ... Gap support body, 5a, 5b ... Insulating layer, 6 ... High voltage power supply, 7 ... Insulated terminal, 8 ... Supply port, 9 ... Outlet, 13 ... Air gap, 31a, 31b ... Flat metal electrode, 32 ... Insulating layer, 33 ... AC high voltage power supply, 34 ... Discharge space, 35 ... Silent discharge, 36 ... Source gas, 37 ... Ground electrode, 38 ... Insulating layer, 39 ... High pressure Electrode, 41 ... container, 42a, 42b ... metal electrode, 43 ... raw water, 44 ... source gas, 45 ... bubble generator, 46 ... bubble

Claims (7)

  A cylindrical ground electrode, a high-voltage electrode disposed inside the ground electrode, a spacer that forms a gap serving as a discharge space between the ground electrode and the high-voltage electrode, and the discharge space. An insulating layer formed on the surface of one or both of the ground electrode and the high-voltage electrode, supplying water in which oxygen-containing gas is dispersed in the discharge space, and the ground electrode and the high-voltage electrode An ozone generator characterized by generating an ozonized gas and ozone water by applying a voltage between them.   The ozone generator according to claim 1, wherein an ozonized gas and ozone water are generated by discharging in an underwater bubble existing in the discharge space.   The ozone generator according to claim 1 or 2, wherein the insulating layer is made of a ceramic material or a metal oxide inorganic material.   The ozone generator according to claim 1, wherein a high frequency voltage is applied as an applied voltage between the ground electrode and the high voltage electrode.   An ejector pump for passing ozonized gas and ozone water generated by applying a voltage, a gas separator for separating ozonized gas and ozone water, and the ozonized gas separated by the gas separator to the ejector pump The ozone generator according to claim 1, further comprising a return circulation path.   The ozone generator according to any one of claims 1 to 5, wherein water supplied to the discharge space is cooled to cool heat generated by generation of ozonized gas and ozone water. The ozone generator according to any one of claims 1 to 6, wherein untreated water containing an organic substance or an odorous substance is mixed into raw water and supplied to the discharge space.

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