JP2007313489A - Sterilizing water production apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for directly cooling electrodes which is most effective in increasing the lives of the electrodes in an apparatus producing sterilizing water containing hypochlorous acid by electrolyzing a solution of chloride ions in a space formed between a plurality of cylindrical electrodes disposed concentrically, and diluting generated electrolytic solution with dilution water; to make an electrolytic cell small and pressure resistant. <P>SOLUTION: In order to cool the electrode, the surface other than the electrolytic surface of the electrode is directly cooled with the dilution water or the sterilizing water generated by diluting the electrolytic solution with dilution water. A suction and dilution means of the electrolytic solution is disposed inside of the cylindrical electrode at the most internal position, or disposed on the end face of the electrolytic cell to make the whole of the electrolytic cell small. By installing the suction and dilution means in the above-mentioned way, the whole of the electrolytic cell can be cylindrically structured, which makes the electrolytic cell pressure resistant. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a sterilization containing hypochlorous acid by electrolyzing a chlorine ion solution in a gap formed between a plurality of concentrically arranged cylindrical electrodes and diluting the produced electrolyte with dilution water. The present invention relates to an apparatus for producing water. More specifically, both or one of the dilution water and the sterilizing water prepared by diluting the electrolyte with the dilution water are in contact with the cylindrical surface of any one of the cylindrical electrodes other than the surface on which the chlorine ion solution is electrolyzed. The present invention also relates to a sterilizing water production apparatus having a structure that flows down.

Patent Document 1 discloses a technique of an electrolytic reaction unit for arranging two cylindrical electrodes having different diameters concentrically and diluting an electrolytic chemical solution electrolyzed in a gap between them with raw water for dilution to generate sterilizing water. .

Further, Patent Document 2 discloses an electrolytic ionic water generator in which cylindrical electrodes are arranged concentrically through a diaphragm.

Furthermore, Patent Document 3 discloses a method for preparing sterilized washing water containing hypochlorous acid and active oxygen by electrolyzing halogen ions using electrodes arranged concentrically.

All of these techniques are common in that electrolysis is performed with an electrolysis apparatus incorporating cylindrical electrodes arranged concentrically. Patent Document 1 is an electrolysis unit for producing sterilizing water in which a cylindrical electrode and a diluting water flow block having a flow in a direction perpendicular to the cylindrical electrode are integrally formed. It is used for the purpose of producing sterilized water by diluting with flowing dilution water. The problem to be solved by this technology is to provide an electrolytic reaction unit for producing sterilized water that is compact and has good electrolysis efficiency, suppresses the temperature rise of the electrolyzer, and absorbs chlorine gas. The cooling effect is obtained because the electrode terminal rod is in the flow of cooling water. There is no particular description about the cooling of the inner surface of the innermost electrode, the outer surface of the outermost electrode, or other electrode surfaces.

The technology of Patent Document 2 relates to an electrolytic ionic water generator that prepares alkaline ionized water and acidic water by providing a diaphragm between cylindrical electrodes arranged concentrically, providing an anode chamber and a cathode chamber. The problem to be solved is to reduce the size of the electrolytic cell and facilitate the replacement of the electrolytic cell. Although the description that the inner space of the innermost electrode is used to pass through the pipe line is seen, the description about the cooling of the electrode surface is not particularly seen as in Patent Document 1.

The technique of Patent Document 3 is a method of electrolyzing an aqueous solution containing halogen ions in the gaps between electrodes arranged concentrically to generate sterilized washing water containing hypohalous acid and active oxygen, and tried to solve it. The problem is to provide an electrolytic cell with good long-term durability performance even if the electrode terminal portion is improved to increase the amount of current per electrode area. And it is said that heat generation was suppressed by increasing the contact area between the innermost electrode and the terminal rod inserted in the center thereof.
JP-A-6-99174 Japanese Patent Laid-Open No. 5-220482 JP 2001-347270 A

An important condition required for the electrolytic cell is that the electrode has a long life as well as good electrolysis efficiency. This is because the electrode material is made of an expensive material such as a noble metal, so that a short life means a significant increase in running cost. In addition, if the durability of the electrode is high, it is possible to increase the electrolysis current value per electrode area, so that it is possible to increase the electrolysis efficiency or to reduce the size of the electrolytic cell by designing the electrode area to be small. is there.

By the way, the temperature of the electrode during electrolysis has the greatest influence on the life of the electrode other than the material of the electrode. It is well known that the lifetime becomes shorter as the electrode temperature becomes higher, but abrupt wear occurs especially when the temperature exceeds 50 ° C. The above Patent Document 1 and Patent Document 3 also mention as a part of its purpose to prevent temperature rise and extend the life of the electrodes.

Accordingly, when examining the contents of the technique of Patent Document 1, electrolysis is performed in the gap between the cylindrical electrodes arranged concentrically, and the inner surface of the innermost electrode, the outer surface of the outermost electrode, etc. There is no description of the cooling measures used. In addition, it is claimed that the cooling effect of this technology can be obtained by placing only the electrode terminal rod that supplies electricity to the electrode in the flow of dilution water, but this method is almost expected to cool the electrode itself. It is not possible. Moreover, since it is set as the structure which has arrange | positioned the water flow block which is a means for diluting electrolyte solution outside the electrolytic vessel, it has resulted in the increase in the whole size.

On the other hand, the technique described in Patent Document 2 is an electrolytic process in which a cylindrical diaphragm is arranged in a gap between cylindrical electrodes arranged concentrically, and an anode and a cathode are separated to generate alkaline ionized water and acidic water. Although it is a tank, there is no means for obtaining the cooling effect because the whole raw water is electrolyzed and there is no subsequent dilution step. Rather, since the electrode is cylindrical, the cooling effect by the air on the innermost surface cannot be expected.

Furthermore, Patent Document 3 aims to reduce Joule heat generated at the contact portion by improving the electrical contact between the inner surface of the cylindrical electrode arranged on the innermost side and the conductor supplying electricity, and lowering the contact resistance. However, there is no means to actively lower the temperature of the electrode itself. In this structure, the escape location itself of the heat generated in the internal electrode is closed, and the heat generated in the contact portion and the heat generated in the electrode are combined to promote the temperature rise of the electrode.

Therefore, the problem to be solved by the present invention is to electrolyze a chlorine ion solution in a gap formed between a plurality of concentric cylindrical electrodes, dilute the generated electrolyte with dilution water, By providing direct electrode cooling means that is most effective in extending the life of the electrode in an apparatus for producing sterilizing water containing hypochlorous acid, and simultaneously reducing the size and pressure resistance of the electrolytic cell. is there.

In order to solve the above problems, the present invention electrolyzes a chlorine ion solution in a gap formed between a plurality of concentrically arranged cylindrical electrodes, and dilutes the generated electrolyte with dilution water to sterilize. In an apparatus for producing water, first, a method for directly cooling an electrode other than the electrolytic surface of the electrode with dilution water or sterilization water produced by diluting the electrolyte with dilution water was devised for cooling the electrode. . In addition, the solution of the suction dilution means for the electrolyte was conceived in the structure of the cylindrical electrode arranged on the innermost side or the end face of the electrolytic cell to solve the problem of making the whole compact. Furthermore, by arranging the suction dilution means as described above, the entire electrolytic cell can be configured in a cylindrical shape, and the problem of increasing the pressure resistance has also been solved. Next, the means for solving the problems will be described in detail for each aspect of the present invention.

As a first aspect for solving the problem, in a gap formed between a plurality of cylindrical electrodes arranged concentrically, a chlorine ion solution is electrolyzed, and the generated electrolyte is diluted with dilution water, In an apparatus for preparing sterilizing water, diluting water or sterilizing water prepared by diluting an electrolytic solution with diluting water is in contact with a cylindrical surface of one of the cylindrical electrodes other than the surface on which the chlorine ion solution is electrolyzed. The structure was made to flow down. Since the electrode composed of a thin metal plate has quick heat conduction on the front and back, the most effective cooling effect of the electrode can be obtained by flowing water directly down the back of the electrolytic surface of the electrode. Since dilution water is usually used at room temperature, the temperature of sterilization water obtained by high-dilution dilution is almost the same room temperature. If it is room temperature, it is 40 ° C or lower in most places in summer, so it can be cooled to the target 50 ° C or lower. However, if necessary, it is 40 ° C or lower, or even 30 ° C or 20 ° C or lower. It is also possible to use diluted water cooled to a low temperature such as 10 ° C. or lower. By cooling the back side of the electrode plate in this way, it becomes possible to continuously cool the electrode surface and the electrolyte solution in contact therewith, suppressing unnecessary chemical reaction between the electrode material and the electrolyte solution, This prevents the electrode from being consumed.

In an electrolytic cell composed of a plurality of cylindrical electrodes, the inner surface of the electrode arranged on the innermost side and the outer surface of the electrode arranged on the outermost side do not contribute to the electrolysis, so that a cooling liquid flows down there. Thus, it is possible to easily achieve electrode cooling. In particular, in an electrolytic cell in which two cylindrical electrodes are arranged concentrically, since all the electrodes are directly cooled by this method, a sufficient cooling effect can be expected. On the other hand, in an electrolytic cell in which four or more cylindrical electrodes are concentrically arranged, any two adjacent electrodes have the same polarity, and a liquid having a cooling action flows down between the two electrodes, thereby affecting the electrolysis voltage. It is also possible to obtain a cooling effect.

A second aspect for solving the problem is to electrolyze a chlorine ion solution in a gap formed between a plurality of concentrically arranged cylindrical electrodes, dilute the generated electrolyte with dilution water, In an apparatus for preparing sterilizing water, diluting water or sterilizing water is used in an electrolytic cell having a structure in which the diluting water or sterilizing water flows down while in contact with a cylindrical surface other than the surface on which the chlorine ion solution is electrolyzed Or it is the structure which arranged the suction dilution means which draws in the flow of dilution water or the water for sterilization into the flow of dilution water or the water for sterilization using the power of the flow in the channel of the prepared sterilization water. In addition to facilitating dilution and mixing of the electrolyte with dilution water, this system makes it possible to create a negative pressure inside the electrolytic cell and avoid applying pressure from the dilution water flow path to the electrolytic cell. This can improve the pressure resistance. Furthermore, since the negative pressure on the electrolytic cell side may be used for supplying the chlorine ion solution to the electrolytic cell, it is not necessary to provide a separate supply means, which is effective for simplifying the apparatus. As the suction dilution means, in addition to the ejector described later, a method of disposing an aspirator, or the flow of sterilization water generated by mixing the dilution water and the electrolyte downstream from the junction of the dilution water channel and the electrolyte discharge pipe It is also possible to use a method in which a drainage pump is arranged on the road and a constant flow valve, an orifice, a throttle valve, or the like is arranged upstream of the junction, and the junction is made negative pressure.

A third aspect for solving the problem has a structure in which the above-described suction dilution means is disposed inside the innermost cylindrical electrode. By doing so, it is possible to avoid an increase in the size of the apparatus due to the arrangement of the suction dilution means outside the electrolytic cell, and there is no need to take out the electrolyte drainage line outside the electrolytic cell, which is corrosive. The risk of leakage of strong electrolyte to the outside can be eliminated. In addition, there is an advantage that the piping route is short and no extra piping material is required. Of course, it is also optimal for cooling the innermost electrode. FIG. 1 will be described as an example of this aspect. This electrolytic cell is composed of two electrodes, an internal electrode 1 and an external electrode 2. Hydrochloric acid is supplied from the hydrochloric acid supply port 10 to the electrode gap and electrolyzed to become an electrolytic solution. The dilution water is supplied from the dilution water supply port 18 to the gap between the external electrode and the jacket 5 and flows upward, and the flow is changed at the end of the electrolytic cell and flows into the ejector 3 from above. When diluting water passes through the throat of the ejector at a high speed, negative pressure is generated, and the electrolyte is sucked into the diluting water flow through the electrolyte discharge pipe 4 connected thereto, diluted and mixed with the sterilizing water. Become. The generated sterilizing water flows down while contacting the inner surface of the internal electrode, and is discharged from the sterilizing water discharge port 19. With this configuration, the outer surface of the external electrode is efficiently cooled with dilution water, and the inner surface of the internal electrode is efficiently cooled with sterilizing water, thereby preventing the electrode from being consumed. In addition, since the ejector is disposed inside the internal electrode, the length of the electrolytic cell is not increased and the thickness is not increased, and the ejector can be manufactured in a small size as a whole.

The fourth aspect for solving the problem has a structure in which the above-described suction dilution means is disposed at the ends of a plurality of cylindrical electrodes arranged concentrically. Suction dilution means are provided at the innermost electrode inner surface or outermost electrode outer surface of a plurality of concentrically arranged cylindrical electrodes, or at a position where dilution water or sterilizing water flowing down the electrode gap flows out from the electrode end surface to the outside. Dilution water or sterilizing water flowing down either the innermost electrode inner surface or outermost electrode outer surface, or the electrode gap is folded back at the electrode end surface, the innermost electrode inner surface or outermost electrode outer surface, Or the structure arrange | positioned in the folding | turning position in the case of flowing in into either of electrode gaps is possible. In any structure, since the suction dilution means can be integrally formed with the electrolytic cell, there is an advantage that the apparatus can be downsized and the flow path components can be saved. As an example, the operation will be described with reference to FIG. The dilution water flows from the dilution water supply port 18 at the lower part of the internal electrode, rises on the inner surface of the internal electrode, and flows into the ejector 3 disposed on the upper end face. In this example, a plurality of ejectors are provided. The direction of flow of the dilution water is changed by the ejector in a direction perpendicular to the ejector. When the diluting water exits the ejector, the diluting water flows downward. Electrolytic solution is sucked from the electrolytic solution discharge pipe by the negative pressure generated when passing through the ejector, and mixed with dilution water to produce sterilizing water. The inner surface of the internal electrode is cooled by the dilution water, and the outer surface of the external electrode is cooled by the sterilizing water. Since the ejector is formed integrally with the electrolytic cell, the entire design can be made compact.

In a fifth aspect for solving the problem, the suction dilution means is an ejector using a flow of dilution water or sterilizing water as a driving source for suction. In other words, the electrolyte discharge line is connected to the suction part of the ejector, and the electrolyte is diluted from the electrolytic cell through the electrolyte discharge line by the negative pressure generated by the high-speed flow of dilution water and sterilization water flowing down the ejector. It is drawn into the flow of water or sterilizing water and mixed and diluted. The ejector used for this purpose must be designed in an optimal shape that matches the flow rate of dilution water and sterilization water. The material of the member to be used is a metal, resin, glass or the like that is durable to the electrolyte, and examples thereof include tantalum, titanium, hastelloy, hard vinyl chloride, and fluororesin.

The sixth aspect for solving the problem is that the dilution water flows in contact with the outer surface of the outermost electrode arranged concentrically and flows down, and the sterilizing water is arranged in the innermost arrangement arranged concentrically. It was decided that the liquid would come into contact with the inner surface of the electrode and flow down. In this aspect, dilution water or sterilizing water flows down the gap between the outermost electrode and the cylindrical outer sheath that covers the outside of the outermost electrode, at the end of the cylindrical electrode. It is a structure that folds down and flows down inside the innermost electrode. The means for aspirating and diluting the electrolyte into dilution water or sterilization water is the position near the electrode end outside the outermost electrode or at the end where the flow of dilution water or sterilization water flows from the outermost electrode outside. It can be arranged at a position where it moves to the inside of the inner electrode, or at a position near the end of the electrode inside the innermost electrode. An example is shown in FIG. 1, FIG. 3, and FIG. FIG. 3 shows an example in which a plurality of ejectors are provided. Moreover, FIG. 5 is an example of the electrolytic cell which combined the four electrodes 20-23. The connection method of these electrodes is to connect wirings of different polarities only at the outermost side and the innermost side and not to the inner two electrodes, so that all electrodes are alternately connected to different polarities even in the so-called multipolar connection. Any so-called monopolar connection can be used, and the same cooling effect can be obtained.

A seventh aspect for solving the problem is that the dilution water flows in contact with the inner surface of the innermost electrode arranged concentrically and flows down, and the sterilizing water is arranged on the outermost side arranged concentrically. The liquid was allowed to flow down on the outer surface of the electrode. This mode is the reverse flow method to the seventh mode, but the installation position of the suction dilution means is exactly the same. An example is shown in FIG.

An eighth aspect for solving the problem is that the electrolytic cell is composed of two cylindrical electrodes arranged concentrically, and the internal electrode is an anode and the external electrode is a cathode, or the internal electrode Is the cathode and the external electrode is the anode. By adopting such a configuration, all the back surfaces of the electrolysis surfaces of the two electrodes can be directly cooled with flowing water, so that all the electrodes can be directly cooled and the electrolyte can be cooled. A cooling effect is obtained. Examples are FIG. 1, FIG. 3, FIG.

In a ninth aspect for solving the problem, the dilution water or the sterilizing water flows down any one of the gaps formed between the plurality of cylindrical electrodes. In an electrolytic cell in which three or more cylindrical electrodes are concentrically arranged, if the electrolysis is performed in all electrode gaps, only the outer surface of the outermost electrode and the inner surface of the innermost electrode cannot be directly cooled. Therefore, in such a case, the adjacent two electrodes are set to the same polarity, and the gap between them is diluted or the sterilizing water is allowed to flow down, so that it becomes possible to directly cool any electrode arranged in the middle. . An example of this will be described with reference to FIG. This example shows an electrolytic cell in which four electrodes are combined. Two intermediate electrodes 21 and 22 are connected with the same polarity, and the innermost electrode 20 and the outermost electrode 23 are connected with different polarities. It is. The dilution water flows in from the dilution water supply port 18 and flows down into the gap between the outside of the outermost electrode and the inside electrodes 21 and 22 and joins at the end. After joining, it flows into the ejector 3, sucks the electrolyte solution from the electrolyte solution discharge pipe, mixes it, and then becomes sterilizing water, flows down the innermost electrode 20 and is discharged to the outside. By comprising in this way, also in the electrolytic cell comprised by four or more electrodes, it becomes possible to raise cooling efficiency further.

The tenth aspect for solving the problem is that the electrolytic cell is a non-diaphragm electrolytic cell. Since the diaphragm type electrolytic cell further arranges the cylindrical diaphragm between the cylindrical electrodes arranged concentrically, the structure becomes extremely complicated. Further, when the electrolyte is sucked by the suction dilution means, the pressure balance is lost on both sides of the diaphragm. It becomes difficult to maintain a sufficient electrolytic function. A diaphragm electrolyzer is the most suitable for exhibiting the features of the present invention better.

The eleventh aspect for solving the problem is that the chloride solution is hydrochloric acid diluted with potable water containing sodium chloride or other minerals. In the water for sterilization prepared by electrolyzing a chloride ion solution, even if the effective chlorine concentration is low, it has sufficient sterilization power, has high storability, and has little adverse effect on the sterilization target. It is water having a pH of 5 to 6.5 called water. By the way, as explained in the tenth aspect of the previous stage, a diaphragm electrolyzer is advantageous in order to better exhibit the features of the present invention, but it is used to generate slightly acidic electrolyzed water in the diaphragm electrolyzer. The only possible chlorine ion source is hydrochloric acid. Therefore, it was decided to use hydrochloric acid as the chlorine ion solution. On the other hand, in order to adjust the effective chlorine concentration and pH of sterilizing water to target values, it is necessary to appropriately adjust the concentration of hydrochloric acid, which is a chlorine ion solution. If the water used at that time contains sodium chloride or other minerals, it is convenient to bring the pH of the prepared sterilizing water into the target range by the buffering action of these minerals.

  The present invention provides a sterilization containing hypochlorous acid by electrolyzing a chlorine ion solution in a gap formed between a plurality of concentrically arranged cylindrical electrodes and diluting the produced electrolyte with dilution water. In an apparatus for producing irrigation water, both or one of dilution water and sterilization water prepared by dilution with dilution water is in contact with a cylindrical surface of one of the cylindrical electrodes other than the surface on which the chlorine ion solution is electrolyzed. However, the cooling of the electrode is achieved by adopting a structure in which the electrolytic solution is sucked and diluted into the diluting water or the sterilizing water by the suction diluting means disposed in the flow path of the diluting water or the sterilizing water. Increased effect and extended electrode life. Furthermore, the chloride ion supply pump is not required, the electrolytic unit including the electrolytic cell is configured in a small size, and the electrolytic cell can be formed in a cylindrical shape, thereby improving the pressure resistance.

Next, in order to further deepen the understanding of the present invention, the best mode for carrying out the present invention will be described based on examples.

FIG. 1 is a schematic view of a main part of a slightly acidic electrolyzed water generating apparatus apia 1500 manufactured by Hokuetsu. The electrolytic cell is composed of two electrodes, the internal electrode is a titanium cylinder to which a catalyst with an outer diameter of 140 mm is attached, the external electrode is a titanium cylinder with an inner diameter of 160 mm, the length of the electrolysis part is 250 mm, the internal electrode is an anode, and the external The electrode is a cathode. An electromagnetic on-off valve 8 was disposed on the hydrochloric acid supply line 9. A current sensor 15 is disposed on the direct current supply wiring to the electrolytic cell, and the electromagnetic on-off valve 8 is opened when the current value falls below the set value, and is controlled to close when the current value exceeds the set value. Electrolysis is performed by controlling the current value within a certain range with the hydrochloric acid concentration. The dilution water was controlled by a constant flow valve 12 disposed on the dilution water supply pipe 11, and a constant flow rate of 1500 L / h was set. In the hydrochloric acid tank 7, 6% by weight of hydrochloric acid was stored and supplied to the electrolytic cell at the same concentration. In the arrows shown in the figure, the solid line indicates the flow direction of dilution water or sterilization water, and the broken line indicates the flow direction of hydrochloric acid or electrolyte. This apparatus was operated at 2.3 V and 35 A, and it was confirmed that slightly acidic electrolyzed water having an effective chlorine concentration of 21 ppm and pH 5.8 could be stably generated at 1500 L / h. The electrolyte temperature in the electrode gap did not exceed the temperature of the dilution water more than 1 degree. Furthermore, it was confirmed that the electrode could operate stably even when the cumulative usage time of the electrode exceeded 6000 hours.

FIG. 2 is a schematic view of the main part of a slightly acidic electrolyzed water generating apparatus apia300 manufactured by Hokuetsu. The electrolytic cell is composed of two electrodes, the inner anode is a titanium cylinder with a 48 mm outer diameter catalyst attached, the outer cathode is a titanium cylinder with an inner diameter of 60 mm, and the electrode length is 140 mm. The ironing pump 16 was disposed on the hydrochloric acid supply pipe. The dilution water enters the dilution water supply port at the top of the electrolytic cell through the flow rate adjusting valve 17, passes through the ejector 3, flows down the inner electrode 1, and is discharged from the sterilization water discharge port 19. The 3% hydrochloric acid stored in the hydrochloric acid tank 7 is supplied to the electrode gap from the hydrochloric acid supply port 10 by the ironing pump. The electrolytic solution is sucked and mixed into the diluted water from the top through the electrolytic solution discharge pipe 4 by the action of the ejector. The control of the current value is the same as in the first embodiment. The apparatus was operated at 2.4 V and 7.7 A to obtain slightly acidic electrolyzed water having an effective chlorine concentration of 23 ppm and a pH of 5.9 at 300 L / h. The maximum temperature of the electrolytic solution did not exceed the dilution water temperature by 2 ° C. or more.

The present invention is a device that generates slightly acidic electrolyzed water that is a highly safe and powerful sterilizing solution, a technology that dramatically extends the life of an electrolytic cell that has the greatest impact on running cost, and a device that has high pressure resistance. Will contribute to the spread of slightly acidic electrolyzed water by providing technology that can be manufactured in a small size.

Schematic diagram of slightly acidic electrolyzed water device using an electrolytic cell that cools two surfaces of a cylindrical electrode Schematic diagram of slightly acidic electrolyzed water device using an electrolytic cell that cools only the inner surface of the cylindrical electrode Cross section of an electrode-cooled electrolytic cell with dilution water flow from the outer surface to the inner surface of a cylindrical electrode Cross section of 2-cell cylindrical electrolytic cell with cooling flow on outer surface, inner surface and electrode gap Cross section of a 3-cell cylindrical electrolytic cell with cooling parts on the outer and inner surfaces Cross section of cylindrical electrolytic cell with ejector at the end of the electrolytic cell

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal electrode 2 External electrode 3 Ejector 4 Electrolyte discharge pipe 5 Electrolytic tank outer jacket 6 Electrolytic tank 7 Hydrochloric acid tank 8 Hydrochloric electromagnetic on-off valve 9 Hydrochloric acid supply line 10 Hydrochloric acid supply port 11 Diluted water supply line 12 Constant flow valve 13 DC power supply 14 Control device 15 Current sensor 16 Ironing pump 17 Flow rate adjusting valve 18 Dilution water supply port 19 Disinfection water discharge port 20 Innermost electrode 21 Intermediate electrode
22 Intermediate electrode 2
23 Outermost electrode

Claims (11)

In an apparatus for preparing a sterilizing water by electrolyzing a chlorine ion solution in a gap formed between a plurality of concentrically arranged cylindrical electrodes and diluting the generated electrolyte with dilution water, dilution water or / And, the sterilizing water prepared by diluting the electrolytic solution with dilution water flows down while in contact with the cylindrical surface of any cylindrical electrode other than the surface where the chlorine ion solution is electrolyzed, Sterilization water production equipment The diluting water or the electrolytic solution produced by diluting the electrolytic solution with the diluting water is diluted with the flow of the diluting water or the sterilizing water. The apparatus for producing sterilizing water according to claim 1, wherein suction dilution means for drawing water or a flow of said sterilizing water is provided. The sterilizing water production apparatus according to claim 1 or 2, wherein the suction dilution means is disposed inside an innermost cylindrical electrode. 3. The sterilizing water production apparatus according to claim 1, wherein the suction dilution means is disposed at end portions of a plurality of cylindrical electrodes arranged concentrically. 5. The sterilizing water production apparatus according to claim 1, wherein the suction dilution means is an ejector that uses the diluted water or the flow of the sterilizing water as a driving source for suction. The dilution water comes into contact with the outer surface of the outermost electrode arranged concentrically and flows down, and the sterilizing water comes into contact with the inner surface of the innermost electrode arranged in concentric circles and flows down 6. A sterilizing water production apparatus according to claim 1, wherein The dilution water comes into contact with the inner surface of the innermost electrode arranged concentrically and flows down, and the sterilizing water comes into contact with the outer surface of the outermost electrode arranged concentrically and flows down 6. The sterilizing water production apparatus according to claim 1, wherein: The electrolytic cell composed of the plurality of cylindrical electrodes is composed of two cylindrical electrodes arranged concentrically, and the internal electrode is used as an anode and the external electrode is used as a cathode, or the internal electrode is used as a cathode. 8. The sterilizing water producing apparatus according to claim 1, wherein the external electrode is an anode. 8. The sterilizing water production apparatus according to claim 1, wherein the dilution water and / or the sterilizing water flows down any one of gaps formed between the plurality of cylindrical electrodes. 10. The sterilizing water production apparatus according to claim 1, wherein the electrolytic cell is a non-diaphragm electrolytic cell having no diaphragm in any electrode gap. 11. The sterilizing water production apparatus according to claim 1, wherein the chloride ion solution is hydrochloric acid diluted with drinking water containing sodium chloride or other minerals.

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