JP2666065B2 - Ozone water production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to water containing ozone used for drainage, sewage, food purification, sterilization, decolorization, deodorization, etc. (hereinafter referred to as ozone water).
Related to a manufacturing apparatus.

[Prior art] In an ozone water producing apparatus, a method is generally employed in which a gas containing ozone generated by an ozonizer (hereinafter, referred to as ozonized gas) is brought into contact with raw water to absorb ozone into water. At that time, the ozonizer was water-cooled to increase ozone generation efficiency, and a separate gas absorbing device was provided for contact between the ozonized gas and the raw water.
This is because the ozonizer of the conventional ozonizer is manufactured integrally with the water cooling unit, and the gas absorbing device is manufactured as a separate unit. Therefore, the ozone water production equipment becomes large and complicated,
It was extremely expensive.

[Problems to be Solved by the Invention] In the present invention, the conventional apparatus for producing ozone water has a large-sized and complicated apparatus which is generated because the ozonized gas absorption apparatus and the ozonizer water cooling unit are configured as separate units. It is intended to solve the above-mentioned problems of high cost and high price.

[Means for Solving the Problems] The present invention solves the above problems by integrating the water cooling section of the ozonizer and the ozonized gas absorbing device, and absorbing the ozonized gas into the raw water in the water cooling section. I do.

That is, the ozone water producing apparatus according to the present invention has an inlet for a source gas containing oxygen, an ozone generator for generating an ozonized gas from the source gas by surface discharge, and an outlet for the ozonized gas. An ozone generator comprising a creeping discharge type ozonizer having a cooling water inlet for cooling the generating part with water, a cooling part and a cooling water outlet, and a power supply for generating a discharge in the ozone generating part. The ozonized gas outlet is communicated with the vicinity of the cooling water inlet, and the ozonized gas and the cooling water are mixed and contacted in the cooling section to cool the ozone generating section and simultaneously generate the ozone water and perform the cooling. It is characterized by supplying ozone water to the outside from the water outlet.

In this case, in order to promote mixed contact of the ozone with the cooling water and to accelerate the absorption thereof, an absorption promoting element made of a filler such as a Raschig ring or a pebble, a wire mesh, a barbed metal wire, or another resistance material is provided inside the cooling section. It is desirable to provide a suitable absorption promoting element such as a special gas-liquid mixed gas absorbing device or the like.

In addition, the surface discharge type ozonizer used in this case is provided with a linear electrode in contact with one surface of the dielectric substrate, and is provided through at least a part of the dielectric substrate (in contact with the other surface of the substrate). Or a surface discharge type ozonizer having a planar electrode arranged at a position facing the linear electrode (embedded in the thickness of the dielectric substrate as described later), and By arranging the dielectric substrate in contact with the surface on the side opposite to the side on which the linear electrodes are arranged, cooling of the ozonizer is promoted, and the ozone generation efficiency can be greatly improved and the ozonizer can be downsized. .

In particular, when the dielectric substrate of the creeping discharge type ozonizer has a cylindrical shape, the linear electrodes are provided on the inner surface thereof, and the planar electrodes are provided on the outer surface thereof, the cooling portion is preferably provided with a water / water heater. Since the jacket can be provided watertight outside the cylindrical dielectric substrate, or the cooling unit can be cooled by immersing the cylindrical surface discharge type ozonizer in the water as a water tank, the structure becomes simple and extremely suitable. is there.

At this time, when a high-purity alumina ceramic substrate having a purity of 92% or more is used as the material of the dielectric substrate, and tungsten is used as the material of the linear electrode and the planar electrode, both electrodes can be easily formed on the alumina ceramic substrate. The high-purity alumina ceramic has a high thermal conductivity, and the cooling effect is improved.

In general, ozone water produced by contacting and mixing with ozonized gas contains a large number of gaseous ozonized gas. Therefore, in order to separate the ozone water from ozone water, it is necessary to provide some kind of gas-liquid separation unit. As such a gas-liquid separation unit, any gas-liquid separation device can be used, but a gas space is formed above the cooling unit and this is used as a gas-liquid separation unit. Bubbles may be ruptured to accumulate residual ozonized gas, which may be discharged to the outside as appropriate.

In this case, since the residual ozonized gas discharged to the outside generally contains ozone harmful to the human body and equipment, the ozonized gas is converted into an ozone removing device including an activated carbon for ozone adsorption, an ozone decomposition catalyst, or a heater for ozone pyrolysis. (Hereinafter referred to as an ozone killer) to remove the ozone and release it to the outside air.

[Operation] As a result of the features and configurations described above, the present invention can achieve both cooling and generation of ozone water at the same time by absorbing ozonized gas into water in the water cooling section of the ozonizer.

[Embodiments] The features and configurations of the present invention will now be described with reference to embodiments and drawings.

FIG. 1 is a cross-sectional view of one embodiment of the present invention, and FIG. 2 is a cross-sectional view thereof. Reference numeral 1 denotes a cylindrical surface discharge type ozonizer in which a planar induction electrode 3 is embedded in the thickness of a cylinder 2 made of 92% pure alumina ceramic. Are arranged opposite to the induction electrode 3 with the alumina ceramic layer 6 interposed therebetween. Reference numerals 7, 7 'denote end annular conductors connected to both ends of the linear electrode group 5 at 3, 5, 7, 7'.
Are made of tungsten and are formed integrally with the alumina-ceramic cylinder 2 by sintering. Reference numeral 8 denotes a high-frequency high-voltage power supply, which applies a high-frequency high voltage between the electrodes 3 and 5 via cables 9 and 9 ′, and extends along the cylindrical inner surface 4 from each side edge of the linear electrode group 5. Causes creeping discharge. 10 is a dry air source that combines an oxygen cylinder, an air cylinder, a dehumidifier and a compressor,
Alternatively, a source gas source for supplying a source gas containing oxygen to the ozonizer 1, such as an oxygen-enriched air source obtained by combining an oxygen-enriching device and a compressor. The source gas is supplied from the source gas source 10 to the interior 14 of the cylindrical surface discharge type ozonizer 1 through a pipe 11, a valve 12, and a gas inlet 13, and a part of oxygen is converted to ozone by the action of the surface discharge. It is converted to ozonized gas. This ozonized gas is injected into supply cooling water from an ozonized gas injection port 20 provided in a throat section 19 of a venturi 18 to be described later through a pipe 16 and a valve 17 from a gas outlet 15 and flows through the throat section 19 at high speed Split into fine bubbles by the action of cooling water,
It is uniformly dispersed in the cooling water and promotes mixed contact between the ozonized gas and the cooling water. That is, the venturi 18 forms an absorption promoting element for promoting absorption of the ozonized gas into the cooling water.

21 is a water-made stainless steel cylinder
A cylindrical surface discharge type ozonizer 1 with a jacket
Are arranged concentrically with a gap 22 forming a cooling water passage around, and have cooling water inlets 23 and outlets 24 near both ends thereof. As shown in FIG. 2, reference numerals 23 and 24 are tangentially attached to the gap 22, so that the cooling water spirally flows inside the passage 22. 25 and 26 are the cylindrical surface discharge type ozonizer 1 and the water jacket.
21 is a disk-shaped insulator end plate for holding and fixing them at both ends in an airtight and watertight manner. Reference numeral 27 denotes a cooling water source comprising a tap water faucet, a water tank, or a combination of a water tank and a pump, which supplies cooling water to a pipe 28, a valve 29, and the venturi.
The cooling water is supplied to the lower end of the cooling water passage 22 from the cooling water inlet 23 through the cooling water passage 18. As described above, when the cooling water passes through the throat portion 19 of the venturi 18 at a high speed in this process, the ozonized gas is dispersed as fine bubbles therein.

Numeral 30 denotes a stainless steel barbed wire as shown in FIG. 3, in which a stainless steel barb 32 is fixed at regular intervals to a stainless stranded wire 31, which is formed inside the cooling water passage 22. Are spirally arranged around the ceramic cylinder 2 to form an absorption promoting element.
That is, the cooling water introduced from the inlet 23 to disperse the ozonized gas microbubbles spirals inside the cooling water passage 22 around the ceramic cylinder 2 along the spiral barbed line 31. In the process of ascending, the ceramic cylinder 2
The vigorously stirring and gas-liquid contact between the ozonized gas microbubbles and the cooling water is performed by the action of the spinous processes 32, and ozone is effectively absorbed by the cooling water to shorten the temperature. Ozone water of a predetermined concentration is generated within a period of time.

The generated ozone water is supplied from the cooling water outlet 24 to the pipe 33 and the valve.
The ozone water from which the residual ozonized gas has been removed is supplied to an external gas-liquid separation device 35 via a pipe 34 and supplied to a target process via a pipe 36.

The residual ozonized gas separated from the water in the gas-liquid separator 35 is passed through a pipe 37 and a valve 38 to the above-mentioned ozone killer.
It is led to 39, where the ozone is removed, and then released to the outside air via a pipe 40.

FIG. 4 is a longitudinal sectional view showing another embodiment of the present invention.
The names and functions of the elements numbered 1 to 40 in the figures are the same as those of the elements of the same number in FIGS. 1 and 2. Reference numeral 43 denotes an ozone water tank, which is filled with cooling water 44 which has been turned into ozone water, and a cylindrical surface discharge type ozonizer 1 already described therein and a gas absorbing device 45 for absorbing ozonized gas into the cooling water. And are inserted from the top.
Therefore, the outer surface of the cylindrical surface discharge type ozonizer 1 is in contact with the ozone water and is cooled strongly. However, the cylindrical creepage discharge type ozonizer 1 of this example has an inlet 13 for the raw material gas provided at the center of the upper end plate 25 as shown in FIG. A source gas introduction pipe 41 extends downward along the central axis, and its lower end opening 42 is located immediately above the upper surface of the lower end plate 26. The raw material gas introduced therein rises in the inside of the ceramic cylinder 2, and is formed by an induction electrode 3 and a linear electrode group 5 which are not shown in the figure and are not shown in the drawing.
Ozone is generated by the action of the creeping discharge generated in the gas and becomes an ozonized gas, which is supplied from the gas outlet 15 to the inlet 46 of the gas absorbing device 45 via the pipe 16 and the valve 17. Cooling water source
The cooling water from 27 is also supplied to the inlet 46 of the gas absorber 45 via the pipe 28 and the valve 29. The ozonized gas and the cooling water supplied from the inlet 46 into the gas absorbing device 45 are subjected to a strong gas-liquid agitation contact action therein, and ozone is effectively absorbed into the cooling water to generate ozone water. The generated ozone water is discharged into the tank 43 from the outlet 47 at the lower part of the gas absorbing device 45 in a state containing many fine bubbles of the residual ozonized gas. The gas absorbing device 45 may be of any principle and structure, but in this example, a structure in which a cylindrical case 48 is filled with a large number of torsion wing elements 49 is used. Adjacent torsional wing elements in the cylindrical case 48 are arranged so that the torsional directions are opposite to each other, and both wing end edges at the contact portion are orthogonal to each other. As the cooling water moves from one torsion blade element to the next, the direction of rotation reverses violently, effective gas-liquid mixing contact takes place, and ozone is absorbed into the cooling water in a short time Then, it becomes ozone water of a predetermined concentration. In the tank 43, the fine bubbles of the residual ozonized gas rise by buoyancy, reach the liquid level 51 of the ozone water at the lower part of the upper space 50, rupture and separate therefrom, and accumulate as gas in the space 50. I do. Reference numeral 52 denotes an ozone water discharge pipe, and a water suction port 53 at the lower end thereof is located directly above a floor surface 54 'of the tank 43, and the ozone water containing no air bubbles passes through the discharge pipe 52 from the tank 43, and the tank 43 Discharged from the pipe
33, supplied to the target process via valve 34.
54 is an outlet of the residual ozonized gas, which communicates with the already-mentioned ozone killer 39 via the pipe 37 and the control valve 55, and after the residual ozonized gas is ozone removed in the ozone killer 39, It is released to the outside air via the pipe 40. Reference numerals 56 and 57 denote upper and lower liquid level sensors, respectively, which are connected to a liquid level controller 58. When the liquid level 51 of the ozone water rises above the position of the sensor 56, the control valve 55 is closed to remove residual ozonized gas. When the discharge is stopped and the liquid level 51 of the ozone water falls below the position of the sensor 57, the control valve 55 is opened to allow the discharge of the residual ozonized gas, and the liquid level 51 of the ozone water is kept at a substantially constant position. To prevent its entry into the ozone killer 39.

[Effect of the Invention] As a result of the above-described features and configurations, the present invention can simultaneously achieve cooling and generation of ozone water by absorbing ozonized gas into water in the water-cooling section of the ozonizer. ,
Simplification and a significant reduction in price have been achieved.

[Brief description of the drawings]

1 is a longitudinal sectional view of one embodiment of the present invention, FIG. 2 is a transverse sectional view thereof, FIG. 3 is a view of a barbed line used in this embodiment, FIG.
FIG. 5 is a longitudinal sectional view of another embodiment of the present invention, and FIG. 5 is a longitudinal sectional view showing the structure of the cylindrical surface discharge type ozonizer. In the figure, 1 ... a cylindrical surface discharge type ozonizer 2 ... a ceramic cylinder 3 ... an induction electrode 5 ... a linear electrode group 6 ... an insulating layer 8 ... a high frequency high voltage power supply 10 ... a source gas source 11, 16, 28 , 33,36,37,40… Pipe 12,17,29,34,38… Valve 13… Gas inlet 15… Gas outlet 18… Venturi 19… Throat section 20… Ozonized gas inlet 21 Water jacket 22 Cooling water passage 23 Cooling water inlet 24 Cooling water outlet 25 Upper end plate 26 Lower end plate 27 Cooling water source 30 Barbed wire 31 Twist Line 32 Spinous process 35 Gas-liquid separator 39 Ozone killer 41 Gas supply pipe 43 Ozone water tank 44 Ozone water 45 Gas absorber 46 Gas and water Inlet 47 ... Gas / water outlet 48 ... Cylindrical case 49 ... Twisted wing element 50 ... Gas space 51 ... Ozone water level 52 ... Ozone water discharge pipe 53 ... water inlet 54 ...... gas outlet 55 ...... regulating valve 56 ...... upper liquid level sensor 57 ...... lower liquid level sensor 58 ...... liquid level controller

Claims (5)

(57) [Claims] A source gas containing oxygen, an ozone generator for generating an ozonized gas containing ozone by creeping discharge from the source gas, and an outlet for the ozonized gas; As an ozonizer having a cooling water inlet, a cooling unit, and a cooling water outlet for water cooling, a linear electrode is disposed in contact with one surface of the dielectric substrate and at least a part of the dielectric substrate is disposed. Creeping discharge type in which a planar electrode is disposed at a position facing the linear electrode through a cooling unit, and a cooling unit is provided in contact with the surface of the dielectric substrate opposite to the surface on which the linear electrode is disposed. An ozonizer using an ozonizer and having a power supply for generating a creeping discharge in the ozone generating section, wherein the ozonized gas outlet communicates with the vicinity of the cooling water inlet, and the ozonized gas and the Mix and contact with cooling water Upon cooling the ozone generator Te simultaneously, ozone water production apparatus, characterized in that for supplying ozone water to the outside from the cooling water outlet upon generation of ozone water is absorbed ozone into the cooling water. 2. The cooling section enhances the mixed contact between the ozonized gas and the cooling water at least inside the cooling water or near the inlet of the cooling water to promote absorption of the ozonized gas into the cooling water. The ozone water producing apparatus according to claim 1, further comprising an absorption promoting element for the ozone water. 3. The surface discharge type ozonizer has a cylindrical dielectric substrate, and the linear electrodes are disposed on the inner surface of the dielectric substrate, and the linear electrodes are disposed through at least a part of the cylindrical dielectric substrate. 2. The ozone water producing apparatus according to claim 1, wherein the ozone water producing apparatus is a cylindrical creeping discharge type ozonizer having the planar electrode disposed at a position facing the electrode. 4. The cooling unit of the cylindrical surface discharge type ozonizer cools a gap between a water jacket provided in a watertight manner so as to surround the outside of the cylindrical dielectric substrate and an outer surface of the substrate. 4. The ozone water producing apparatus according to claim 3, wherein the ozone water producing apparatus is a water-cooled jacket-type cooling section formed by flowing water. 5. The ozone generator according to claim 1, wherein said cooling section of said cylindrical surface discharge type ozonizer comprises a water tank and most of said ozone generating section is immersed in the cooling water of said water tank. Item 3. An ozone water producing apparatus according to any one of Items 1 to 3.