JP2003190953A - Electrolytic sterilized water producing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that the life of an electrode is shortened by the temperature rise of an electrolytic cell in a apparatus for producing electrolytic sterilized water by applying electrolysis to raw water containing a chlorine ion such as hydrochloric acid, and to provide an electrolytic sterilized water producing apparatus capable of efficiently suppressing the temperature rise of the electrolytic cell without making it large-sized. <P>SOLUTION: The electrolytic sterilized water producing apparatus 20 capable of suppressing the temperature rise of the electrolytic cell 30 and prolonging the life of the electrode is provided by installing a cooling jacket 40 through which cooling water is passed in the outside of the electrolytic cell 30. A structure having a connection passage 50 for letting the electrolytic sterilized water produce in the electrolytic cell 30 into the cooling jacket 40 and supplying the electrolytic sterilized water from a cooling water outlet 42 after it is stirred and mixed with cooling water and diluted inside the cooling jacket 40 is adopted to the apparatus. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic sterilized water production apparatus for electrolyzing raw material water containing chlorine ions to produce electrolytic sterilized water containing hypochlorous acid.

[0002]

2. Description of the Related Art In recent years, it has been known that electrolyzed water obtained by electrolyzing various solutions has a sterilizing effect, and such electrolyzed water has been applied to various sterilization and disinfection ( Kiyoko Shiba et al., "Strong Electrolyzed Water Handbook", Medical Information Company, 1995). As a conventional method for producing electrolytic sterilized water, for example, as disclosed in JP-A-1-180293, water containing sodium chloride is passed through an electrolytic cell with a diaphragm, which is electrolyzed to generate on the anode side. It is known to obtain strong acidic water as electrolyzed water. The pH of this electrolytic sterilizing water is 1.5 or more and 3.2 or less, and it is said that the sterilizing effect is higher than that of a simple low pH liquid. Further, in the technique disclosed in the specification of Japanese Patent No. 2627100, water to which sodium chloride is added and water to which hydrochloric acid is added are mixed and electrolyzed by a diaphragmless electrolytic cell. Water added with sodium chloride is an essential additive for increasing the efficiency of electrolysis. Furthermore, Japanese Patent Application Nos. 8-309920 and 10
No. 189744 (all inventors are one of the present inventors, Toyohiko Doi), a hydrochloric acid aqueous solution containing substantially no sodium chloride is passed through a diaphragmless electrolytic cell to be electrolyzed to obtain electrolytic sterilized water. Techniques for obtaining are disclosed.

The electrolytic sterilizing water produced by these techniques has a high sterilizing effect even at a low chlorine concentration as compared with, for example, chlorine water prepared by dissolving soda hypochlorite in water. Moreover, since it is not necessary to finely adjust the concentration each time it is used, it is suitable as a germicide. Water as a raw material for electrolytic sterilization water (hereinafter sometimes referred to as raw material water)
Is water containing chloride ions, such as an aqueous solution of sodium chloride and an aqueous solution of hydrochloric acid. Such raw material water is electrolyzed, chlorine gas is generated by the action of electrolytic oxidation, and the generated chlorine gas is dissolved in water to generate hypochlorous acid in water. The electrolytic sterilized water exhibits a bactericidal effect by the action of this hypochlorous acid.

[0004]

However, in the conventional electrolytic sterilizing water producing apparatus, there is a problem that the temperature of the electrolytic cell tends to rise due to electrolysis and the electrode deteriorates to shorten the life. In addition, the high concentration electrolytic sterilized water supplied from the electrolysis tank is usually used by diluting with water, but if the high concentration electrolytic sterilized water is directly touched by the user's fingers, it may cause rough skin. There is an inconvenience such as a cause. In the above-mentioned Japanese Patent Application No. 10-189744, water such as tap water (hereinafter sometimes referred to as raw water) is divided into two hands, one of which is supplied to the electrolytic cell as raw water for electrolysis and the other of which is supplied from the electrolytic cell. Disclosed is a technique to use as diluted water of high-concentration electrolytic sterilizing water to be supplied, but a stirring and mixing tank for stirring and mixing electrolytic sterilizing water and diluting water discharged from an electrolytic tank is provided separately from the electrolytic tank.
When the diluted electrolytic sterilizing water is supplied, it is unavoidable that the size of the entire equipment including the electrolytic sterilizing water producing apparatus is increased and the cost is increased. In addition, the problem that the concentration of the product (electrolytic sterilized water) finally supplied from the outlet is difficult to stabilize unless there is a means for stirring and mixing the diluting water and the electrolytic sterilized water like the stirring and mixing tank. There is.

The object of the present invention is to (1) suppress the temperature rise of the electrolytic cell and suppress the deterioration of the electrode to extend the life of the electrode. (2) The electrolytic sterilized water produced in the electrolytic cell is used as a cooling water passage. Dilute by stirring and mixing with cooling water using
It is an object of the present invention to provide a compact electrolytic sterilizing water production apparatus capable of stabilizing the supply concentration at low cost.

[0006]

The electrolytic sterilizing water producing apparatus according to the present invention is an electrolytic sterilizing water producing apparatus that electrolyzes raw material water containing chlorine ions to produce electrolytic sterilizing water. A cooling water passage through which cooling water is passed is provided in an electrolytic cell that electrolyzes to produce the electrolytic sterilized water. According to a second aspect of the present invention, in the electrolytic sterilized water manufacturing apparatus according to the first aspect, the electrolytic cell and the cooling water passage are connected by a connection passage, and the cooling water passage is from a cooling water inlet of the cooling water passage. It has a function of stirring and mixing the inflowing cooling water and the electrolytic sterilizing water flowing into the cooling water passage through the connection passage, and cooling the electrolytic sterilizing water mixed and diluted with the cooling water in the cooling water passage. It is characterized by being supplied from a water outlet. According to a third aspect of the present invention, in the electrolytic sterilized water manufacturing apparatus according to the second aspect, a connection passage outlet, which is an end portion of the connection passage on the cooling water passage side, is opened near the cooling water inlet. Characterize. According to a fourth aspect of the present invention, in the electrolytic sterilized water manufacturing apparatus according to the second or third aspect, a connection passage inlet, which is an end portion of the connection passage on the electrolytic cell side, is opened at an upper portion of the electrolytic cell. Is characterized by. According to a fifth aspect of the present invention, in the electrolytic sterilized water manufacturing apparatus according to any one of the first to fourth aspects, a cooling jacket that is the cooling water passage is provided in a ring shape outside the electrolytic cell, and the cooling jacket is provided. It is characterized in that it is configured in a double-cylindrical shape so that the central axis line of is substantially horizontal. According to a sixth aspect of the present invention, in the electrolytic sterilizing water production apparatus according to any of the second to fourth aspects, a cooling jacket, which is the cooling water passage, is provided in a ring shape outside the electrolytic cell, and the cooling jacket is provided. The cooling jacket is installed in such a manner that the central axis of the cooling jacket is substantially horizontal, and the cooling jacket cools the cooling water introduced from the cooling water inlet by passing the cooling water over substantially the entire circumference of the cooling jacket. The cooling water passage for discharging from the water outlet is formed.

The electrolytic sterilizing water producing apparatus according to the present invention has a structure in which a cooling water passage for cooling is provided in the electrolytic cell, and the cooling water passage provided in the electrolytic cell suppresses the temperature rise of the electrolytic cell. Therefore, the deterioration of the electrode can be suppressed and the life of the electrode can be extended. Thereby, the desired electrolysis efficiency can be stably maintained over a long period of time. As the cooling water passage, for example, a water passage pipe provided inside the electrolytic cell or along the outer surface of the outer wall of the electrolytic cell, or a jacket provided along the outer surface of the outer wall of the electrolytic cell (cooling jacket of claim 5 and the like). Various configurations such as a flow path (passage) through which cooling water flows can be used.

In the electrolytic sterilized water producing apparatus according to the second aspect of the present invention, the electrolytic sterilized water generated in the electrolytic bath is caused to flow into the cooling water passage through the connection passage connecting the electrolytic bath and the cooling water passage. In this cooling water passage, the cooling water is agitated and mixed to be diluted, and then supplied from the cooling water outlet of the cooling water passage. Here, the cooling water passage has a function of stirring and mixing the electrolytic sterilization water and the cooling water that have flowed into the cooling water passage through the connection passage, and as a configuration for realizing the stirring and mixing, for example, a pipe shape A cooling water passage having a curved or bent contact stirring means such as a stirring projection or unevenness is used. As a result, the electrolytic sterilized water diluted with a desired dilution concentration can be stably supplied from the cooling water outlet.

It is more preferable that the connection passage outlet, which is the end portion of the connection passage on the cooling water passage side, is opened near the cooling water inlet. The electrolytic sterilization water and the cooling water can be more sufficiently stirred and mixed in the cooling water passage.

When the connection passage inlet, which is the end of the connection passage on the electrolytic cell side, is opened at the upper part of the electrolytic cell, the raw material in the electrolytic cell is set. It is possible to prevent the gas (hydrogen gas, etc.) generated by the electrolysis of water (hydrochloric acid aqueous solution, etc.) from the upper part of the electrolytic cell to be sequentially sent out to the cooling water path through the connection path and stay in the upper part of the electrolytic cell . As a result, it is possible to prevent the inconvenience that the amount of raw water contained in the electrolytic cell decreases due to the stagnant gas in the electrolytic cell and the electrolysis efficiency decreases, and the volume of the electrolytic cell can be effectively utilized. When the raw material water such as hydrochloric acid aqueous solution flows into the electrolysis tank through the liquid inlet provided in the electrolysis tank (water for dilution also flows in if necessary), it is generated by electrolysis in the electrolysis tank Then, the gas accumulated in the upper part of the electrolytic cell is sequentially pushed out by the inflow of the raw material water or the like from the raw material liquid inlet, and is discharged to the cooling water passage through the connection passage. The gas, such as hydrogen gas, which is sent into the cooling water passage and is difficult to dissolve in water, is stirred together with the electrolytic sterilizing water and the cooling water to fulfill the function of promoting the stirring and mixing of the electrolytic sterilizing water and the cooling water. When the connection passage outlet is provided in the vicinity of the cooling water inlet of the cooling water passage as described in claim 3, the stirring effect of the gas can be more effectively exerted.

According to a fifth aspect of the present invention, a cooling jacket, which is the cooling water passage, is provided in a ring shape on the outside of the electrolytic cell, and the cooling jacket is installed so that the central axis of the cooling jacket is substantially horizontal. If the configuration is cylindrical, the electrolytic cell is protected inside the cooling jacket, and the cooling efficiency of the electrolytic cell can be improved. Further, electrolytic sterilizing water is introduced into the cooling jacket through the connection passage and stirred and mixed with the cooling water in the cooling jacket (claim 2
4), the cooling water passage of the invention described in 4) is a ring-shaped cooling jacket on the outer side of the electrolytic cell, so that a longer passage (passage) for stirring and mixing can be ensured or stirring and mixing can be performed. It is easy to adopt a configuration for imparting the function for, and there is also an advantage that the electrolytic sterilization water and the cooling water can be more sufficiently stirred and mixed. Specifically, as described in claim 6, a cooling water passage through which the cooling jacket allows the cooling water introduced from the cooling water inlet to pass through substantially the entire circumference in the circumferential direction of the cooling jacket and to discharge the cooling water from the cooling water outlet. It is realized by the configuration forming the.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the electrolytic sterilizing water producing apparatus of the present invention will be described below. Here, the raw material water containing chlorine ions, which is a raw material for electrolytic sterilization water, is water containing chlorine ions, such as an aqueous solution of sodium chloride or an aqueous solution of hydrochloric acid. Electrolytic sterilizing water production apparatus according to the present invention,
Such raw material water is electrolyzed, chlorine gas is generated by the action of electrolytic oxidation, and the generated chlorine gas is dissolved in water to generate hypochlorous acid in water. However,
Improving electrolysis efficiency, thereby reducing running costs,
In terms of extending the life of the electrode, Japanese Patent Application No. 10-189744
As described in No. 3, a non-diaphragm electrolytic cell is used as an electrolytic cell, a bipolar electrode is used as an electrode for electrolysis, and raw material water that does not substantially contain sodium chloride (raw material water without artificial addition of sodium. It is suitable to employ a configuration in which an ion concentration of 200 ppm or less) is electrolyzed in an electrolytic cell (non-diaphragm electrolytic cell).

Generally, in an electrolytic cell, when the electrode is composed of a plurality of electrode plates and is energized, the energizing method is as follows.
Conventionally, two types of types, a monopolar type and a bipolar type, are known (edited by the Electrochemical Society of Japan, “Electrochemical Handbook”, No. 51).
0 page, Maruzen, 1958). The unipolar type is a type in which all of the electrode plates are either cathodes or anodes, and the bipolar type has, for example, a structure in which a plurality of electrodes are insulated from each other at regular intervals and overlapped. Between the electrode plate connected to the anode of the power source and the electrode plate connected to the cathode of the power source, there is at least one electrode that is not connected to any of the electrodes (hereinafter referred to as an intermediate electrode). This is the format (in the present specification, an electrode that performs a monopolar energization method is described as a monopolar electrode and an electrode that performs a bipolar electrode energization method is described as a bipolar electrode). As in Japanese Patent Application No. 10-189744, a bipolar electrode has various advantages as compared with a monopolar electrode, and as described above, a raw material containing substantially no sodium chloride in a diaphragmless electrolytic cell. By using it for electrolysis of water, various effects such as improvement of electrolysis efficiency, reduction of running cost due to it, and extension of life of the electrode can be obtained.

FIG. 1 is a configuration diagram of an electrolytic sterilizing water production system including an electrolytic sterilizing water producing apparatus according to an embodiment of the present invention. The electrolytic sterilized water production system 1 uses hydrochloric acid (aqueous solution) and raw water such as tap water to produce electrolytic sterilized water 2
No. 0 electrolysis tank 30 and the raw water prepared by diluting the hydrochloric acid aqueous solution with raw water is electrolyzed in the electrolysis tank 30 to generate electrolytic sterilized water.
A mixture of the cooling water mixed with the cooling water in the cooling jacket 40 of 0 is supplied from the supply port 16, and the raw water line 1A through which the raw water flowing from the raw water inlet 2 flows and a part of the raw water flowing through this raw water line 1A. A dilution water supply line 1B for supplying to the electrolytic bath 30 of the electrolytic sterilized water manufacturing apparatus 20;
A cooling water supply line 1C for supplying a part of the raw water flowing through the raw water line 1A as cooling water to a cooling jacket 40 which is a cooling water passage of the electrolytic sterilized water production apparatus 20, and an electrolysis of the electrolytic sterilized water production apparatus 20 for hydrochloric acid aqueous solution. Hydrochloric acid supply line 1D for supplying to tank 30, and electrolytic sterilized water (diluted) discharged from cooling water outlet 42 of cooling jacket 40 produced in electrolytic sterilized water production apparatus 20 to electrolytic inlet water supplied to supply port 16 It has a supply line 1E. The dilution water supply line 1B is branched into two parts downstream from the flow divider 9 provided in the raw water line 1A, and the cooling water supply line 1C is the other branched part.

In the electrolytic cell 30, the raw water prepared by diluting the hydrochloric acid (aqueous solution) supplied from the hydrochloric acid supply line 1D with the raw water as the dilution water supplied from the dilution water supply line 1B is electrolyzed. It is like this.
The concentration of hydrogen chloride in the raw material water is preferably 0.01% (by weight, hereinafter, the same unless otherwise specified) in order to cause an appropriate reaction, and particularly preferably 0.1% or more. Is recommended. However, when economic efficiency is pursued, the hydrogen chloride concentration is preferably 1.0% or more and 21.0% or less. That is, the hydrogen chloride concentration is 1.0
%, It is possible to obtain an industrially stable reaction, and if it is 21.0% or less, no smoke is generated at room temperature, which is desirable in terms of storage and handling. "Raw water" means tap water, ground water, underground water, demineralized water, distilled water, purified water (RO water, membrane-treated water), mixed water thereof, and the like, which does not substantially contain sodium chloride. is doing.

The raw water line 1A has a strainer 4 and a strainer 4 in a flow path through which raw water flowing from the raw water inlet 2 flows.
Valve 5 (solenoid valve) that opens and closes the flow of raw water on the downstream side of
A pressure sensor 6a, 6b for measuring the pressure of the raw water flowing in the pipe on the downstream side of the solenoid valve 5, a constant flow valve 7 for adjusting the flow rate of the raw water to a constant level on the downstream side of the solenoid valve 5, and the raw water. A check valve 8 for preventing backflow from the downstream side of the constant flow valve 7 is connected, and a diversion water supply line 1B and a cooling water supply line are connected by a flow divider 9 connected to the downstream side of the check valve 8. 1C
It has been branched to.

The dilution water supply line 1B is connected to a pump 10 for sending raw water toward the electrolytic cell 30 and a back pressure check valve 11 for preventing backflow of raw water on the downstream side of the pump 10. On the other hand, the cooling water supply line 1C is the raw water line 1
A raw water flow path formed by a portion of the pipe 3 at the downstream end of A extending to the downstream side of the flow distributor 9 is connected to the cooling jacket 40 of the electrolytic sterilizing water producing apparatus 20, and the cooling water supply line 1C is provided. The raw water flowing through the cooling water is supplied to the raw water inlet 2 of the raw water line 1A by a pump (not shown), and the cooling jacket 40 of the electrolytic sterilized water manufacturing apparatus 20 is controlled by the raw water.
Sent to.

A hydrochloric acid aqueous solution (H
CL) container 12 and a pipe 1 from this container 12
A pump 14 for sucking the hydrochloric acid aqueous solution through 3 and sending it toward the electrolytic sterilization water producing apparatus 20 and a back pressure check valve 15 for preventing the reverse flow of the hydrochloric acid aqueous solution are connected on the downstream side of the pump 14.

The electrolytic water supply line 1E has a raw water line 1
The electrolytic sterilized water sent from the electrolytic sterilized water manufacturing apparatus 20 flows in by the inflow pressure of the raw water into A and the feed pressure of the pumps 10 and 14, and is sent out to the supply port 16. An on-off valve 17 (solenoid valve) for opening and closing the flow of electrolytic sterilizing water is provided in the bypass flow passage 1F connected to the electrolytic water supply line 1E.
Also, a PH meter 18 for measuring the pH of the electrolytic sterilization water is connected. One end of the bypass flow passage 1F is connected to the electrolyzed water supply line 1E via the flow distributor Fa, and the other end is downstream of the one end via the flow distributor Fb to the electrolyzed water supply line 1E.
It is connected to E.

2 to 4 are views showing an electrolytic sterilized water producing apparatus 20, FIG. 2 is a perspective view, FIG. 3 is a front view, and FIG. 4 is a longitudinal sectional view. 3 and 4, the front and rear of the electrolytic sterilized water manufacturing apparatus 20 shown in FIG. 2 are reversed, and FIG. 3 shows the connection passage 50 of the electrolytic sterilized water manufacturing apparatus 20 shown in FIG.
It is the figure seen from the end plate 23 side in which is formed, and this is made into the "front". Further, FIG. 4 illustrates the size of FIG. 3 in a slightly enlarged manner.

As shown in FIGS. 2 to 4, the electrolytic sterilizing water producing apparatus 20 includes an inner cylinder 21 that constitutes a cylindrical partition wall (a cylindrical inner wall), and a cylinder that is concentrically arranged outside the inner cylinder 21. An outer cylinder 22 that forms a cylindrical outer case (cylindrical outer wall), and disks 23a and 24a that close the openings of both ends of the inner cylinder 21 in the axial direction,
The discs 23b and 24b fixed so as to cover the discs 23a and 24a from the outside, and the discs 23b and 24b are housed inside and are concentrically arranged on the outside to be integrated with each other. 21. The annular plates 23c, 24 for closing both axial ends of a ring-shaped space defined between the outer cylinder 21 and the outer cylinder 22.
It is a double cylindrical container (tank) composed of c and the like.
Discs 23a, 23b, 24a, 24b and annular plate 23
c and 24c constitute the end plates 23 and 24 of the double cylindrical container.

The electrolytic cell 30 and the cooling jacket 4
0 is defined inside the electrolytic sterilizing water manufacturing apparatus 20. The electrolytic cell 30 is formed by the inner cylinder 21 and the disks 23a and 24a at both axial ends thereof. Also,
An inner cylinder 21 as a partition with the electrolytic cell 30, an outer cylinder 22,
The annular jackets 23c and 24c form a cooling jacket 40 that surrounds the outside of the electrolytic cell 30 in a ring shape. Further, the electrolytic sterilized water manufacturing apparatus 20 is installed with the central axis direction of the double cylindrical container being substantially horizontal,
The outer periphery of the electrolytic cell 30 is arranged so that the cooling jacket 40 surrounds the substantially horizontal center axis of the electrolytic cell 30. 2 to 3,
The upper side of the paper is the upper side of the device 20, and the lower side of the paper is the lower side of the device 20. Further, the side portion of the device 20 is a portion that forms a side surface between the upper portion and the lower portion (for example, left and right in FIG. 3).

This electrolytic sterilized water producing apparatus 20 is equipped with an electrolytic bath 3
At 0, electrolysis of the raw material water in which the hydrochloric acid aqueous solution supplied by the hydrochloric acid supply line 1D shown in FIG. 1 and the dilution water (raw water) supplied by the dilution water supply line 1B are electrolyzed to generate electrolytic sterilized water. Then, this electrolytic sterilizing water is connected to the connecting passage 50.
The cooling water is introduced into the cooling water passage through the cooling jacket 40 to be mixed with the cooling water supplied from the cooling water supply line 1C to the cooling jacket 40 to be diluted, and then discharged and supplied from the cooling water outlet 42. It has become. The cooling jacket 40 has a function of cooling the electrolyzer 30 with cooling water, and also functions as a mixing tank for mixing and diluting electrolytic sterilized water with cooling water. Electrolysis in the electrolysis tank 30 and dilution of electrolytic sterilizing water in the cooling jacket 40 are performed by inflowing a hydrochloric acid aqueous solution or raw water into the electrolysis tank 30 from the hydrochloric acid supply line 1D or dilution water supply line 1B, and cooling from the cooling water supply line 1C. The cooling water can be continuously supplied to the jacket 40. In this case, the amount of the liquid (electrolytic sterilized water diluted with the cooling water) corresponding to the inflow of the liquid from each of the lines 1B to 1D is cooled. It is continuously discharged from the water outlet 42.

The connection passage 50 has a perforation formed in the front end plate 23 (specifically, the disk 23a constituting the end plate of the electrolytic cell 30) in a straight line along the surface direction of the disk 23a.
A hole formed by penetrating the inner cylinder 21 located on the extension of the perforation is communicated with the electrolytic cell 3 at one end thereof.
It has a connection passage inlet 51 opening into 0 and a connection passage outlet 52 opening into the cooling jacket 40 at the other end. In FIGS. 3 and 4, since the circular plate 23a is provided with a through hole, one end thereof is sealed with the sealing material 53, and the connection passage inlet 51 is formed.
Electrolytic sterilized water that has flowed into the connection passage 50 from the disk 23a
The sealability is improved by not entering the joint between the inner cylinder 21 and the inner cylinder 21, but the invention is not limited to this. For example, forming a perforation on the end face of the disc 23a at the connection passage inlet 51 side. Is also possible, in this case the sealing material 53
The labor of sealing by can be omitted.

The electrolytic bath 30 produces electrolytic sterilized water by electrolyzing raw material water obtained by diluting the hydrochloric acid aqueous solution supplied by the hydrochloric acid supply line 1D with the dilution water (raw water) supplied by the dilution water supply line 1B. It is a diaphragm type electrolytic cell. The hydrochloric acid aqueous solution supplied by the hydrochloric acid supply line 1D and the diluting water (raw water) supplied by the diluting water supply line 1B are liquid inlets 31a, 31b (inflow holes) of the pipe connecting portion 31 projected outside the end plate 24 on the rear surface side. ) Into the inner space of the electrolytic cell 30, that is, the inner space surrounded by the inner cylinder 21 and the disks 23a and 24a at both axial ends thereof. Piping terminals of the hydrochloric acid supply line 1D and the dilution water supply line 1B are connected to the liquid inlets 31a and 31b.

In the inner space of the electrolytic cell 30, there are arranged a plurality of disc-shaped electrodes 32, 32 ... Arranged in a direction orthogonal to the central axis of the electrolytic cell 30, and the plurality of electrodes 32 are energized. As a result, the raw material water in the electrolytic cell 30 is electrolyzed. In FIG. 4, reference numerals 33 and 34 are electrically insulating spacers that secure a space between the electrodes 32. However, in detail, the plurality of electrodes 32 constitute a bipolar electrode, and the electrodes are energized so that an electrode having neither polarity exists between the electrode serving as the anode and the electrode serving as the cathode. The terminals 34a, 34b for energizing the electrode 32 are used in the electrolytic sterilized water manufacturing apparatus 2
It penetrates through the end plates 23 and 24 of 0, and is projected outside,
A DC power supply 35 connected to these terminals 34a and 34b energizes each electrode 32 that serves as an anode or a cathode. As described above, when the raw material water containing no sodium ions is electrolyzed by the diaphragmless electrolytic cell 30 equipped with the bipolar electrode, excellent electrolysis efficiency can be obtained (Japanese Patent Application No.
0-189744).

The electrolytic sterilizing water produced in the electrolytic cell 30 is sequentially connected to the connection passage 50 as the liquid (hydrochloric acid aqueous solution or diluted water) flows into the electrolytic cell 30 from the hydrochloric acid supply line 1D or the diluted water supply line 1B. It flows into the cooling jacket 40 so as to be extruded through. Here, from the hydrochloric acid supply line 1D or the dilution water supply line 1B, the liquid inlets 31a, 3
The hydrochloric acid aqueous solution and dilution water that have flowed into the 1b are connected to the pipe connecting portion 3
1 through the flow passages 31c and 31d (see FIG. 3) in the pipe connection portion 31 to be merged and mixed, and the electrolytic cell 3 of the end plate 24 in which the pipe connection portion 31 is provided.
The end portion of the merging flow passage 31e (see FIG. 4) that opens toward the inner surface facing the 0 inner space is introduced into the inner space of the electrolytic cell 30. On the other hand, the connecting passage 50 is provided on the front end plate 2
Since the liquid in the electrolysis tank 30 flows in from the connection passage inlet 51 opening to the inner surface side facing the inner space of the electrolysis tank 30 of 3, the raw material water before electrolysis in the electrolysis tank 30 is on the rear surface side. The end plate 24 moves from the side of the end plate 24 to the end plate 23 on the front side while being sequentially electrolyzed, and finally flows into the connection passage 50 in a state where hydrochloric acid is almost completely decomposed (electrolytic sterilized water). Moreover, while the end portion of the confluent flow passage 31e is open to the lower portion of the end plate 24 on the rear surface side, the connection passage inlet 51 of the connection passage 50 is formed.
Is opened at the upper part of the end plate 23 on the front side, and from this point as well, the raw material water in the electrolytic cell 30 can be sufficiently electrolyzed before reaching the connection passage 50.

In the electrolysis of raw material water which is a mixed water of hydrochloric acid aqueous solution and dilution water, chlorine gas generated from the anode is dissolved in the raw material water to generate hypochlorous acid, while hydrogen gas generated from the cathode is Since it has poor water solubility, it does not dissolve in the raw material water and rises as bubbles. If this hydrogen gas accumulates in the upper part of the electrolysis tank 30, the amount of raw material water contained in the electrolysis tank 30 decreases, which causes a decrease in electrolysis efficiency. However, in the electrolytic sterilized water manufacturing apparatus 20, as described above. , Connection passage 5
Since the connection passage inlet 50 of 0 is opened in the upper part of the electrolytic cell 30 (upper part of the end plate 23), the electrolytic cell is accompanied by the inflow of the hydrochloric acid aqueous solution or the diluted water from the hydrochloric acid supply line 1D or the diluted water supply line 1B. In addition to the electrolytic sterilizing water generated in 30, the bubbles of hydrogen gas are sequentially pushed out so that the connection passage 5
Since it can be introduced into and discharged from the cooling jacket 40 from 0 and gas can be prevented from accumulating in the electrolysis tank 30, high electrolysis efficiency can be maintained.

Further, in this electrolytic sterilized water producing apparatus 20,
By the cooling water flowing in the cooling jacket 40, the electrolytic cell 3
Since 0 is cooled, the electrolyzer 30 due to heat generated by electrolysis
Can suppress the temperature rise. As a result, the deterioration of the electrode 32 can be suppressed, and the life of the electrode 32 can be extended. Therefore, there is an advantage that high electrolysis efficiency can be stably maintained for a long period of time. The cooling water supplied from the cooling water supply line 1C flows from the cooling water inlet 41 on the side of the cooling jacket 40 into the cooling jacket 40, that is, the inner cylinder 21, the outer cylinder 22, and the both annular plates 23c and 24c. It flows into the inner space surrounded by and flows in the ring-shaped cooling jacket 40 counterclockwise in FIG. 3 and flows out from the cooling water outlet 42 provided near the cooling water inlet 41. The cooling jacket 4 is provided between the cooling water inlet 41 and the cooling water outlet 42.
The interior of 0 is watertightly divided by a partition plate 43, and the cooling water flowing from the cooling water inlet 41 into the cooling jacket 40 moves around the entire circumference of the cooling jacket 40 and then from the cooling water outlet 42. An outflow passage (cooling water passage) is formed. Moreover, in the cooling jacket 40, a plurality of baffle plates 44 and 45, which are distributed over the entire circumference in the circumferential direction of the ring-shaped cooling jacket 40, form a flow path meandered many times.
The contact and heat exchange between the inner surface, in particular, the inner cylinder 21 serving as a partition wall between the electrolytic cell 30 and the cooling jacket 40 and the cooling water are sufficiently performed so that the electrolytic cell 30 can be effectively cooled. ing.

Both the baffles 44 and 45 shown in FIGS. 3 and 4 are in the form of ribs that connect the inner cylinder 21 and the outer cylinder 22, but the baffle 44 is the front side. End plate 23
A gap portion 44a, which is a cooling water passage, is secured only between (specifically, the annular plate 23c), and the other portion is in close contact with the inner surface of the cooling jacket 40. A gap portion 45a which is a cooling water passage is secured only between the end plate 24 (specifically, the annular plate 24c), and the other portion is in close contact with the inner surface of the cooling jacket 40.
The cooling water flowing in 0 is the gap 4 between the baffles 44 and 45.
It repeatedly meanders and flows via 4a and 45a.

In the cooling jacket 40, the electrolytic sterilized water flowing from the electrolytic cell 30 into the cooling jacket 40 through the connection passage 50 is mixed with the cooling water and flows toward the cooling water outlet 42 while being stirred. . Connection passage outlet 52
Has an opening in the cooling jacket 40 near the cooling water inlet 41, so that the
The electrolyzed sterilized water that has flowed into the inside flows along the cooling water along substantially the entire length of the cooling water passage in the cooling jacket 40 and then flows out from the cooling water outlet 42.
While moving inside, contact with the baffles 44, 45 described above,
By meandering or the like, it is well stirred and mixed with the cooling water. Therefore, electrolytic sterilized water diluted to a desired concentration can be stably obtained from the cooling water outlet 42.

Moreover, in the cooling jacket 40, bubbles of gas having a poor water solubility such as hydrogen gas flowing from the electrolytic cell 30 through the connection passage 50 are also directed to the cooling water outlet 42 together with the cooling water and the electrolytic sterilizing water. I will be washed away. Here, the bubbles of hydrogen gas or the like fulfill a function of promoting stirring and mixing of the cooling water and the electrolytic sterilized water by being stirred in water while being in contact with the baffles 44, 45 and the like. As shown in FIG. 3, from the vicinity of the cooling water inlet 41 to the lower part of the cooling jacket 40, the installation intervals of the baffle plates 44 and 45 are shorter than other portions, and the initial stirring region R is arranged in high density.
Is provided and is easily moved to the downstream side of the cooling water passage due to the flow of cooling water (and electrolytic sterilizing water) such as bubbles of hydrogen gas flowing in from the connection passage 50. A large amount of gas accumulates near the connection passage 50.
There is no inconvenience such as obstruction to the inflow of electrolytic sterilization water from.

The mechanism for promoting the stirring and mixing of the cooling water flowing in the cooling jacket and the electrolytic sterilizing water is not limited to the baffles 44 and 45 described above, and, for example, the installation of Raschig rings, berl saddles, etc. can also be adopted. Is.

(Cooling Effect) FIG. 5 is a graph showing a temperature change in the electrolytic cell 30 of the electrolytic sterilized water manufacturing apparatus 20 according to the present invention. The vertical axis shown in FIG. 5 is the temperature (° C),
The horizontal axis is time (minutes). In order to examine the temperature change during electrolysis, the electrolytic sterilized water production apparatus 20 was configured so that the electrolytic sterilized water could be directly taken out by a take-out tube without being mixed with the raw water in the cooling jacket 40. Then, a temperature sensor is installed on the outer surface of the take-out tube, and the electrolytic cell 30
The temperature of electrolytic sterilized water immediately after being discharged from was measured. In order to confirm the cooling effect, the same measurement was performed with and without water flowing through the cooling jacket 40. As shown in FIG. 5, when the cooling water was flown through the cooling jacket 40, the temperature of the electrolytic cell 30 was lower than that when the cooling water was not flowed, and the cooling effect was confirmed. Moreover, 50.4 is attached to the terminals 34a and 34b of the electrode 32 of the electrolytic sterilized water manufacturing apparatus 20.
A current of VDC / 2.5 A was applied to cause electrolysis, and raw water having a standard water hardness of 21 ° C. and cooling water were supplied to the electrolytic cell 30 and the cooling jacket 40 in an environment of room temperature of 31 ° C. When the pipe temperature at the connection passage inlet 51 shown in FIG. 3 was measured, the pipe temperature was 58 ° C. without cooling, but the pipe temperature was 47 ° C. with cooling, confirming the cooling effect.

(Mixing Effect) FIG. 6 is a graph showing changes in effective chlorine concentration of the electrolytic sterilizing water manufacturing apparatus according to the present invention. To the electrolysis tank 30 of the electrolytic sterilized water manufacturing apparatus 20 shown in FIGS. 1 to 4, 100 mL / h of a 5% hydrochloric acid aqueous solution is supplied, and 20 L / m of water is supplied to the cooling jacket 40 to supply the electrode 3
A current of 24 VDC / 2 A was applied to the terminals 32a and 33a of 2, 33 to generate electrolytic sterilized water, and diluted electrolytic sterilized water was obtained. This electrolytic sterilized water was sampled at regular intervals, and the value of effective chlorine concentration was measured by the following iodometric titration method. That is, 200 g of the sampled sample was precisely weighed, 2 g of potassium iodide and 10 mL of acetic acid (1 → 4) were added, the container was immediately sealed and left in the dark for 15 minutes, and the liberated iodine was 0.005 mol / L sodium thiosulfate. Titrate with solution (indicator starch reagent). In addition, a separate blank test will be performed and corrected. 1 mL of the 0.005 mol / L sodium thiosulfate solution corresponds to 0.17727 mgCl.

(Gas Leakage) A 50 cm cubic box was prepared, and the electrolytic sterilizing water production apparatus 20 and the chlorine gas sensor (made by himself using a semiconductor gas sensor manufactured by Figaro Giken Co., Ltd.) shown in FIGS. It was set up in and electrolyzed continuously. Electrolysis was carried out for 5 hours continuously, but chlorine gas was not detected. On the other hand, when the same test was conducted using the electrolytic cell used to confirm the cooling effect (electrolytic cell without the cooling jacket 40), the chlorine concentration in the air was 0.6 ppm after 5 hours.
Met. This is because when the high-concentration electrolytic sterilized water discharged from the electrolytic cell is made to flow down through the tube or joint, a slight amount of chlorine gas permeates from the tube or joint, and the cooling jacket 40 according to the present invention. It is shown that gas permeation is completely prevented in the attached electrolytic cell 30. That is, in the electrolytic sterilizing water production apparatus of the present invention having the structure of the electrolytic bath 30 with the cooling jacket 40, the sealing performance of the electrolytic bath 30 is improved and the high concentration electrolytic sterilization generated in the electrolytic bath 30 is performed. Since the water is mixed and diluted with the cooling water in the cooling jacket without going out of the electrolytic sterilizing water manufacturing apparatus, there is no chance that chlorine gas leaks to the outside, and high safety can be secured.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible.
These are also within the scope of this invention. For example, in the embodiment of the present invention, the configuration is shown in which the water (raw water) flowing through the same raw water line as the raw water supplied as the dilution water to the electrolytic cell is supplied to the cooling jacket as the cooling water, but it is supplied to the cooling jacket. The diluting water is not necessarily taken from the same water source as the diluting water supplied to the electrolytic cell, but may be a water source different from the diluting water supplied to the electrolytic cell.
In addition, in this embodiment, an aqueous hydrochloric acid solution is taken as an example of the electrolyte raw material for electrolysis, but it is also possible to apply salt or potassium chloride to the present invention. The specific shapes of the electrolytic cell and the cooling jacket are not limited to those exemplified in the above-mentioned embodiment, and various types can be adopted.
For example, the structure of the cooling jacket is not merely a ring-shaped outer surface of the electrolytic cell, but a large area on the outer side of the electrolytic cell is covered to improve the sealing performance and to prevent chlorine gas, etc. It advantageously functions to prevent gas leakage. Further, the inner cylinder 21 and the outer cylinder 22 of the above-described embodiment.
The “circular” shape such as the “circular” cylindrical shape, the “circular” plate or the “circular” annular plate that constitutes each end plate 23, 24 is not limited to a perfect circle, and an ellipse and other modified examples are also possible. included.

[0038]

According to the electrolytic sterilizing water producing apparatus of the present invention, the electrolytic cell is provided with the cooling water passage for cooling, and the temperature of the electrolytic cell is controlled by the cooling water passage provided in the electrolytic cell. Since the rise is suppressed, the deterioration of the electrode can be suppressed and the life of the electrode can be extended. Thereby, the desired electrolysis efficiency can be stably maintained over a long period of time.

According to the electrolytic sterilizing water producing apparatus of the second aspect of the invention, the electrolytic sterilizing water produced in the electrolytic bath is supplied to the cooling water passage through the connection passage connecting the electrolytic bath and the cooling water passage. It can be supplied from the cooling water outlet of the cooling water passage after being diluted with the cooling water passage by stirring and mixing with the cooling water in the cooling water passage. Can be stably supplied.

It is more preferable that the connection passage outlet, which is the end of the connection passage on the cooling water passage side, is opened near the cooling water inlet. The electrolytic sterilization water and the cooling water can be more sufficiently stirred and mixed in the cooling water passage.

According to the invention as set forth in claim 4, when the connection passage inlet which is the end portion of the connection passage on the electrolytic cell side is opened to the upper part of the electrolytic cell, the raw material in the electrolytic cell is The gas (hydrogen gas or chlorine gas) generated by the electrolysis of water (hydrochloric acid solution, etc.) is sequentially sent out from the upper part of the electrolytic cell to the cooling water channel through the connection channel and stays in the upper part of the electrolytic cell. It can be prevented. As a result, it is possible to prevent the inconvenience that the amount of raw water contained in the electrolytic cell decreases due to the stagnant gas in the electrolytic cell and the electrolysis efficiency decreases, and the volume of the electrolytic cell can be effectively utilized. Further, gas bubbles that have flowed into the cooling water passage can also be used to promote stirring and mixing of electrolytic sterilized water and cooling water.

According to a fifth aspect of the present invention, a cooling jacket, which is the cooling water passage, is provided in a ring shape outside the electrolytic cell, and the double jacket is installed so that the central axis of the cooling jacket is substantially horizontal. If the configuration is cylindrical, the electrolytic cell is protected inside the cooling jacket, and the cooling efficiency of the electrolytic cell can be improved. In addition, the cooling jacket that covers the outside of the electrolytic cell can enhance the sealing performance of the electrolytic cell, reliably prevent a small amount of chlorine gas from leaking, and improve the safety.

According to the sixth aspect of the present invention, the cooling jacket forms a cooling water passage through which the cooling water introduced from the cooling water inlet passes through substantially the entire circumference in the circumferential direction of the cooling jacket and is discharged from the cooling water outlet. With such a configuration, it is easy to secure a longer flow path for stirring and mixing, or to provide a function for stirring and mixing, and it is possible to sufficiently stir and mix electrolytic sterilized water and cooling water. There is also an advantage that can be done.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electrolytic sterilizing water production system including an electrolytic sterilizing water producing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an electrolytic sterilizing water manufacturing apparatus according to an embodiment of the present invention.

FIG. 3 is a front view showing an electrolytic sterilizing water production apparatus according to an embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing an electrolytic sterilizing water manufacturing apparatus according to an embodiment of the present invention.

FIG. 5 is a graph showing a temperature change in the electrolytic cell of the electrolytic sterilizing water manufacturing apparatus according to the embodiment of the present invention.

FIG. 6 is a graph showing changes in effective chlorine concentration of the electrolytic sterilizing water manufacturing apparatus according to the embodiment of the present invention.

[Explanation of symbols]

20 ... Electrolytic sterilizing water production apparatus, 30 ... Electrolyzer, 40 ... Cooling jacket, 41 ... Cooling water inlet, 42 ... Cooling water outlet, 5
0 ... connecting passage, 51 ... connecting passage inlet, 52 ... connecting passage outlet.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 1/76 C02F 1/76 A (72) Inventor Masayoshi Suzuki 8-6-19 Nishitsuruma, Yamato-shi, Kanagawa F-term in Hokuetsu Giken Industrial Co., Ltd. (Reference) 4D050 AA02 AA04 AB06 BB04 BD02 BD06 CA10 4D061 DA02 DA03 DB10 EA02 EB01 EB04 EB14 EB20 ED12 ED20

Claims (6)

[Claims] 1. An electrolytic sterilizing water production apparatus for electrolyzing raw material water containing chlorine ions to produce electrolytic sterilizing water, comprising: an electrolytic cell for electrolyzing the raw material water to produce the electrolytic sterilizing water. An electrolytic sterilized water producing apparatus, characterized in that a cooling water passage through which cooling water is passed is provided. 2. The electrolytic cell and the cooling water passage are connected by a connection passage, and the cooling water passage is cooled by the cooling water introduced from a cooling water inlet of the cooling water passage and the connection passage. It has a function of stirring and mixing electrolytic sterilizing water that has flowed into the passage, and electrolytic sterilizing water mixed and diluted by the cooling water is supplied from a cooling water outlet of the cooling water passage. The electrolytic sterilizing water manufacturing apparatus according to claim 1. 3. The electrolytic sterilized water production apparatus according to claim 2, wherein a connection passage outlet, which is an end portion of the connection passage on the cooling water passage side, is opened near the cooling water inlet. 4. The electrolytic sterilized water production apparatus according to claim 2, wherein a connection passage inlet, which is an end portion of the connection passage on the electrolysis tank side, is opened at an upper portion of the electrolysis tank. 5. A cooling jacket, which is the cooling water passage, is provided in a ring shape on the outside of the electrolytic cell, and is configured in a double cylinder shape so that a central axis of the cooling jacket is substantially horizontal. The electrolytic sterilized water production apparatus according to any one of claims 1 to 4, wherein 6. A cooling jacket, which is the cooling water passage, is provided in a ring shape on the outside of the electrolytic cell, and is configured in a double cylinder shape so that a central axis of the cooling jacket is substantially horizontal. 3. The cooling jacket forms a cooling water passage through which the cooling water introduced from the cooling water inlet passes through almost the entire circumference in the circumferential direction of the cooling water and is discharged from the cooling water outlet. The electrolytic sterilized water manufacturing apparatus according to any one of 1 to 4.