JPH11319831A - Production of electrolytic function water and its apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for production capable of reducing the electrolytic electric power of electrolytic function water which has a sterilization effect and does not affect the environment and an apparatus for production therefor. SOLUTION: This apparatus has a membrane 5 between electrodes 3 and 4 carrying catalysts consisting essentrically of platinum and iridium and/or ruthenium and an electrolysis is effected by supplying an aq. chloride soln. to an electrolytic cell 2 separately formed with electrolytic chambers 6, 7 by the membrane 5, by which the electrolytic function water having the sterilization effect is obtd. from the electrolytic chamber on the acidic side of the electrolytic cell 2. The chloride is added by a chloride adding means 15 to the raw water supplied by a raw water supplying means 11, by which the aq. chloride soln. of a concn. above 0.025 mol/liter is prepd. The apparatus is provided with electrolytic function water taking-out means 16, 17 for taking the electrolytic function water out of both electrolytic chambers 6, 7 and diluting water supplying means 22, 23 for diluting the electrolytic function water so as to include an effective residual chloride of 30 to 50 ppm by supplying the diluting water to the electrolytic function water taken out of the electrolytic chambers on the acidic side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method and an apparatus for producing electrolyzed functional water.

[0002]

2. Description of the Related Art Conventionally, an ion-permeable diaphragm is provided between a pair of electrodes disposed opposite to each other, and an aqueous solution containing a chloride such as sodium chloride is supplied to an electrolytic cell separated into two electrolytic chambers by the diaphragm. There is known a method for producing electrolyzed functional water, which supplies and applies a voltage between both electrodes to electrolyze the chloride aqueous solution. According to the production method, acidic electrolytic functional water containing effective residual chlorine such as chlorine and hypochlorous acid is obtained from the electrolytic chamber on the anode side of the electrolytic cell, and the electrolytic functional water is mainly composed of the effective residual chlorine. Can be used for sterilization, disinfection, etc.

In the above-mentioned production method, when the concentration of the aqueous chloride solution is low, a large electrolysis water having an effective residual chlorine concentration of 30 ppm or more, which is effective for sterilization and disinfection by the electrolysis, is to be produced. Power consumption is required. Therefore, for example, when sodium chloride is used as the chloride, the concentration of sodium chloride is set to 1.0 g /
Although the electric conductivity of the aqueous chloride solution is increased by reducing the amount to about 1 liter (0.017 mol / liter) to reduce the electric power consumption, it is desired to further reduce the electric power consumption.

In the above-mentioned production method, when the concentration of the aqueous chloride solution used for the electrolysis is further increased from about 0.017 mol / liter, the electric conductivity of the aqueous solution is increased, so that the electrolytic power is reduced. be able to. However, in the electrolysis of an aqueous solution containing the chloride, the amount of chloride used for the production of chlorine, hypochlorous acid, and the like is extremely small, and most of the chloride is left as it is in the aqueous solution. I have. Therefore, when the electrolyzed functional water is used, chloride that has not been electrolyzed is discharged as it is.

On the other hand, in nature, the salt concentration is generally 500
Water of less than mg / L (0.0085 mol / L in terms of sodium chloride) is regarded as fresh water, and when a large amount of water containing a high concentration of salt is discharged in the fresh water zone, the salt is accumulated and causes salt damage to plants. It is said that adverse effects on the environment such as ecosystems will occur. The salt concentration means the concentration of an inorganic salt contained in water such as sodium, potassium, calcium, magnesium and the like.

However, conventionally, the concentration of salt such as sodium chloride contained in the electrolyzed functional water discharged after use has not been taken into consideration. There is a disadvantage that the environment may be affected.

In order to reduce power consumption in the above-mentioned manufacturing method, it is conceivable to adjust the applied voltage to promote the production of chlorine, hypochlorous acid and the like. When water containing chlorine ions is electrolyzed like the aqueous chloride solution, reactions represented by the following formulas (1) to (4) occur in the electrolytic chamber on the anode side of the electrolytic cell.

[0008]

Embedded image

However, in the reactions of the above formulas (1) to (4), the production of proton (H ⁺ ) and the production of chlorine (Cl ₂ ) and hypochlorous acid (HClO) occur competitively. That is, while the standard oxidation potential of the formula (1) relating to the proton generation is 1.23 V, the standard oxidation potentials of the formulas (2) and (3) relating to the production of chlorine (Cl ₂ ) are each 1. 3
Equation (4) relating to 6V and 1.40V, hypochlorous acid (HClO) production has a standard oxidation potential of 1.50V and is very close. As a result, it is difficult to control each of the reactions by adjusting the applied voltage.

Therefore, it is desired to develop a method for producing electrolyzed functional water that can reduce the power required for electrolysis without using the above-described means.

[0011]

SUMMARY OF THE INVENTION The present invention solves the above disadvantages, reduces the power required for electrolysis, and provides a method for producing electrolyzed functional water which has a bactericidal effect and does not affect the environment. An object is to provide a manufacturing apparatus.

[0012]

In order to achieve the above object, a method for producing electrolyzed functional water according to the present invention comprises an ion-permeable membrane between a pair of electrodes arranged opposite to each other, and the membrane is used for the ion-permeable membrane. A chloride aqueous solution is supplied to an electrolytic cell separated and formed in one electrolytic chamber, and a voltage is applied between both electrodes to perform electrolysis of the chloride aqueous solution, and has a sterilizing effect from the electrolytic chamber on the anode side of the electrolytic cell. In a method for producing electrolyzed functional water, a chloride aqueous solution having a concentration of 0.025 mol / liter or more is prepared by adding chloride to raw water, and the aqueous chloride solution is converted to platinum, iridium and / or ruthenium. Is supplied to the electrolytic chamber provided with an electrode carrying a catalyst containing as a main component, and electrolyzes the electrolytic functional water obtained from the electrolytic chamber on the anode side so that the effective residual chlorine is in the range of 30 to 50 ppm. Features dilution To.

According to the production method of the present invention, by using an electrode carrying a catalyst containing platinum and iridium and / or ruthenium as main components, an overvoltage relating to generation of available chlorine such as chlorine and hypochlorous acid is reduced. Since the power consumption is reduced, the power consumption for electrolysis can be reduced. In addition, the term "mainly containing" means that the catalyst contains not only a simple substance of platinum, iridium and ruthenium but also an oxide thereof.

Further, according to the production method of the present invention, chloride is added to raw water substantially free of chloride to obtain 0.02
Since the chloride aqueous solution having a concentration of 5 mol / L or more is electrolyzed, acidic electrolyzed functional water containing a high concentration of residual available chlorine can be obtained from the electrolysis chamber on the anode side with a lower electrolysis power.

However, the acidic electrolyzed functional water obtained from the electrolysis chamber on the anode side contains a chloride having substantially the above-mentioned concentration, and if discharged as it is, there is a possibility that it will adversely affect the environment such as an ecosystem. Then, in the manufacturing method of the present invention,
The acidic electrolysis functional water obtained from the anode-side electrolysis chamber,
Effective residual chlorine concentration is at least 30ppm or more, 50p
Dilute so that it falls within the range of pm or less. By diluting the electrolyzed functional water in this way, the sterilizing effect of the diluted electrolyzed functional water can be maintained. Further, by diluting the electrolyzed functional water as described above, the concentration of chloride is reduced, and when the electrolyzed functional water is discharged after use, adverse effects on the environment can be suppressed. Further, since the pH becomes higher than that of ordinary strong acidic water by the dilution as described above, an effect that chlorine gas is hardly generated from the acidic electrolyzed functional water can be obtained.

In the production method of the present invention, when the concentration of the aqueous chloride solution used for the electrolysis is less than 0.025 mol / liter, the effect of reducing the power consumption of the electrolysis is not sufficiently obtained. When the remaining available chlorine in the diluted electrolyzed functional water is less than 30 ppm, a stable bactericidal effect cannot be obtained, and when it exceeds 50 ppm, the chloride concentration is not sufficiently reduced, which may adversely affect the environment. At the same time, the electrolysis power per generated amount of the diluted electrolyzed functional water increases, and the generation efficiency decreases.

According to the production method of the present invention, an ion-permeable diaphragm is provided between a pair of electrodes opposed to each other while supporting a catalyst containing platinum and iridium and / or ruthenium as main components. An electrolytic cell separated and formed in two electrolytic chambers, raw water supply means for supplying raw water to the electrolytic cell, and chloride added to the raw water to prepare a chloride aqueous solution having a concentration of 0.025 mol / L or more. Means for adding chloride, means for extracting electrolyzed functional water generated from both electrolysis chambers, and means for diluting water supplied to the electrolyzed functional water taken out from the electrolysis chamber on the anode side to reduce the effective residual chlorine concentration to 30 ~ 50ppm
And a diluting water supply means for diluting the functional water so as to fall within the range described above.

The dilution water supply means may supply any dilution water as long as it can dilute the electrolysis functional water taken out of the electrolysis chamber on the acidic side as described above. By supplying the raw water as the dilution water, the device configuration can be simplified.

[0019]

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a system configuration diagram of an apparatus for producing electrolyzed functional water of the present embodiment, and FIG. 2 is a graph showing a relationship between a chloride concentration of raw water for obtaining a predetermined residual chlorine concentration and electric power required for electrolysis. FIG. 3 is a graph showing the relationship between the residual chlorine concentration and the power required for electrolysis for raw water having a predetermined chloride concentration.

As shown in FIG. 1, in the electrolyzed functional water producing apparatus 1 of the present embodiment, the electrolytic cell 2 is provided with an ion-permeable diaphragm 5 between the electrodes 3 and 4 arranged opposite to each other. It has a configuration in which two electrolysis chambers 6 and 7 are separately formed. The electrodes 3 and 4 are each made of a mesh-shaped titanium electrode carrying an electrocatalyst (manufactured by Nippon Carlit Co., Ltd.) mainly composed of platinum and iridium oxide. The electrodes are connected to a power supply device 8 to alternately switch the polarity. For example, the electrode 3 becomes an anode and the electrode 4 becomes a cathode.

The respective electrolytic chambers 6 and 7 are connected to sodium chloride aqueous solution supply conduits 9 and 10, respectively. The sodium chloride aqueous solution supply conduits 9 and 10 are connected to a water pipe (not shown) via a raw water conduit 11, an electromagnetic valve 12, and a pressure reducing valve 13, and are supplied from a concentrated sodium chloride aqueous solution tank 14 by a metering pump 15. The aqueous solution is mixed with the raw water in the raw water conduit 11 so that a predetermined concentration of sodium chloride aqueous solution is supplied from the sodium chloride aqueous solution supply conduits 9 and 10 to the respective electrolytic chambers 6 and 7. The raw water conduit 11 is provided with a flow sensor 11a, and the sodium chloride aqueous solution supply conduits 9, 10 are provided with flow control valves 9a, 10a, respectively.

The acidic or alkaline electrolyzed functional water generated by the electrolysis of the saline solution in each of the electrolysis chambers 6 and 7 is taken out by electrolyzed water extraction conduits 16 and 17, and the three-way valves 18 and 19 are used to extract the acidic electrolyzed water. The water is taken out from the acidic electrolyzed functional water extraction conduit 20 and the alkaline electrolyzed functional water is extracted from the alkaline electrolyzed functional water extraction conduit 21.

Dilution water conduits 22 and 23 are connected to the electrolysis function water extraction conduits 16 and 17, respectively.
Numeral 3 is connected to the raw water conduit 11 via a bypass conduit 24, an electromagnetic valve 25, and a pressure reducing valve 26. In addition, dilution water conduit 2
2 and 23 are provided with flow control valves 22a and 23a and flow sensors 22b and 23b, respectively.

In the electrolyzed functional water producing apparatus 1, the control means 27
The switching of the polarity of the electrodes 3 and 4 and the control of the connection direction of the three-way valves 18 and 19 corresponding to the switching of the polarity are performed by, for example, the control unit 27 sets the electrode 3 to the anode and the electrode 4 to the cathode. When performing electrolysis as above, the three-way valve 18 connects the electrolysis function water extraction conduit 16 and the acidic electrolysis function water extraction conduit 20, and the three-way valve 19 connects the electrolysis function water extraction conduit 17 and the alkaline electrolysis function water extraction conduit 21. Connecting. In this case, since the electrolysis chamber 6 is on the anode side, acidic electrolyzed functional water is generated in the electrolysis chamber 6, and alkaline electrolyzed functional water is generated in the electrolysis chamber 7 on the cathode side. Then, a predetermined amount of raw water is supplied as dilution water to the electrolysis function water extraction conduits 16 and 17 via dilution water conduits 22 and 23 by a bypass conduit 24 branched from the raw water conduit 11. The generated acidic electrolyzed functional water is diluted with the diluting water to obtain an acidic electrolyzed functional water extraction conduit 2.
From 0, the alkaline electrolyzed functional water generated in the electrolysis chamber 7 is similarly diluted with the dilution water and taken out from the alkaline electrolyzed functional water extraction conduit 21.

In the electrolyzed functional water producing apparatus 1, if the polarities of the electrodes 3 and 4 are fixed as described above, the scale composed of a precipitate of a basic compound such as calcium carbonate and magnesium carbonate is formed on the electrode 4 on the cathode side. Since the electrolysis efficiency gradually decreases after the adhesion, the polarity of the electrodes 3 and 4 is periodically switched alternately in order to prevent this.

When the control means 27 performs electrolysis by switching the polarity so that the electrode 3 is the cathode opposite to the above and the electrode 4 is the anode, alkaline electrolyzed functional water is generated in the electrolysis chamber 6. In the electrolysis chamber 7, acidic electrolyzed functional water is generated. Therefore, in this case, the control means 27 controls the three-way valve 18
Connects the electrolyzed functional water extraction conduit 16 and the alkaline electrolyzed functional water extraction conduit 21 by means of
And the alkaline electrolyzed functional water generated in the electrolytic chamber 6 is supplied from the alkaline electrolyzed functional water extraction conduit 21 to the electrolytic chamber 7.
The acidic electrolyzed functional water generated in the above is taken out from the acidic electrolyzed functional water extraction conduit 20. Therefore, the electrodes 3, 4
Is switched, the conduit from which the acidic or alkaline electrolyzed functional water is taken out does not change.

Next, the operation of the apparatus shown in FIG. 1 will be described.

In science dealing with the natural environment, generally, a salt concentration represented by the sum of the concentrations of inorganic salts contained in water such as sodium, potassium, calcium, magnesium, etc. is 50%.
Water less than 0 mg / liter (equivalent to 0.0085 mol / liter in terms of sodium chloride) is classified as fresh water, and water exceeding 500 mg / liter is classified as salt water. Therefore, when the electrolyzed functional water is used in the freshwater zone, the concentration of the chloride contained in the electrolyzed functional water, for example, the concentration of sodium chloride is not more than 0.1.
If it is less than 0085 mol / l, it can be said that there is almost no load on the environment. However, even if the concentration of sodium chloride is 0.0085 mol / liter or more, the load on the environment can be reduced by setting the value as close to the upper limit of the fresh water as possible.

On the other hand, when the aqueous sodium chloride solution is electrolyzed in the electrolytic cell 2 shown in FIG. 1, an electrolytic functional water having a predetermined residual chlorine concentration can be produced with less power as the sodium chloride concentration is higher. Next, FIG. 2 shows the relationship between the chloride concentration of raw water and the power required for electrolysis, and FIG. 3 shows the relationship between the residual chlorine concentration and the power required for electrolysis. It is clear from FIGS. 2 and 3 that the higher the concentration of the aqueous sodium chloride solution, the lower the power consumption is required to produce the electrolyzed functional water having a predetermined residual chlorine concentration.

In the apparatus shown in FIG. 1, a concentrated sodium chloride aqueous solution is supplied from a concentrated sodium chloride aqueous solution tank 14 to a raw water conduit 11 by a metering pump 15 so that the concentration is about 2% of the concentration used in the conventional production of electrolyzed functional water. An aqueous solution of sodium chloride having a concentration of 0.025 mol / L (1.46 g / L) or more, for example, 0.025 to 0.05 mol / L (1.46 to 2.93 g / L) or more. Sodium chloride aqueous solution supply conduits 9 and 10 are supplied to the respective electrolytic chambers 6 and 7.
When the concentration of the aqueous sodium chloride solution is less than 0.025 mol / l, the effect of reducing the electrolytic power cannot be sufficiently obtained, and when it exceeds 0.05 mol / l, the effect of further reducing the electrolytic power gradually decreases. On the other hand, the effect of reducing the amount of electrolysis power is not so much obtained.

Next, when electrolysis is performed by the control means 27 using, for example, the electrode 3 as an anode and the electrode 4 as a cathode, each of the electrolysis chambers 6 and 7 contains sodium chloride having a concentration approximately twice that of the conventional sodium chloride as described above. Since the aqueous solution is supplied, as is clear from FIGS. 2 and 3, electrolysis can be performed with low power consumption, and electrolyzed functional water containing a high concentration of effective residual chlorine is obtained from the electrolysis chamber 6 on the anode side. be able to.

Next, the electrolyzed functional water is taken out of the electrolysis chambers 6 and 7 by the electrolyzed water outlet conduits 16 and 17.
At this time, via the raw water conduit 11 and the bypass conduit 24,
Raw water not containing sodium chloride is supplied from dilution water conduits 22 and 23 connected to the electrolysis function water extraction conduits 16 and 17. As a result, in the electrolyzed functional water take-out conduit 16 connected to the electrolytic chamber 6 on the anode side, the electrolyzed functional water containing the high concentration of residual chlorine is supplied by the diluent water conduit 22 from the raw water not containing sodium chloride. It is diluted so that the concentration of sodium chloride becomes 0.015 mol / l or less, and at least 30 ppm or more in order to maintain the bactericidal effect, and 50 ppm or less in consideration of the variation due to the temperature dependence of the electrolytic efficiency. It is made to contain a concentration of available residual chlorine. Then, the electrolyzed functional water containing the effective residual chlorine concentration thus diluted is extracted from the acidic electrolyzed functional water extraction conduit 20.

Next, an example of this embodiment will be described.

[0034]

[Embodiment 1] In this embodiment, 0.027 concentrated sodium chloride aqueous solution supplied from the metering pump 15 is used.
An aqueous sodium chloride solution adjusted to a concentration of mol / liter (1.6 g / liter) is supplied from the sodium chloride aqueous solution supply conduits 9 and 10 to each of the electrolysis chambers 6 and 7 at a flow rate of 0.25 liter / minute. And between the electrodes 3 and 4.
Electrolysis was performed by applying a voltage of 6V. The electrolysis current is 2.3
2A. As a result, acidic electrolysis water (intermediate product) having a residual chlorine concentration of 88.7 ppm and a pH of 2.65 was obtained from the electrolysis water extraction conduit 16.

Then, the electrolyzed functional water is diluted 2.7 times with the raw water not containing sodium chloride supplied from the dilution water conduit 22, and then the acidic electrolyzed functional water extraction conduit 20 is diluted.
, An acidic electrolytic functional water (final product) having a residual chlorine concentration of 30.4 ppm and a pH of 3.51 was obtained at a flow rate of 0.675 liter / min.

Finally, the electrolysis power required to obtain 1 liter of the electrolyzed functional water (final product) was 0.32 Wh.

[0037]

COMPARATIVE EXAMPLE 1 In this comparative example, an aqueous sodium chloride solution adjusted to 0.0135 mol / liter (0.8 g / liter) by a metering pump 15 was supplied from sodium chloride aqueous solution supply conduits 9 and 10 to each electrolytic chamber 6. , 1 in 7.
The electrode 6 is supplied at a flow rate of 0 liter / min.
Electrolysis was performed by applying a voltage of 9.9 V between the cells. The electrolysis current was 7.5A.

In this comparative example, no dilution was performed, and as a result, the residual chlorine concentration of 30.9 p.m.
As a result, acidic electrolyzed functional water (final product) having a pm of pH 2.7 was obtained. Finally, the electrolysis power required to obtain 1 liter of the electrolyzed functional water (final product) was 1.23 Wh.
Table 1 shows the results.

[0039]

[Table 1]

From Table 1, according to Example 1, it is possible to obtain electrolyzed functional water having a residual chlorine concentration equivalent to that of Comparative Example 1 with about ４ of the power of Comparative Example 1, and the electrolysis power is greatly reduced. It is clear that it can be reduced. The electrolyzed functional water of the final product obtained in Example 1 had a sodium chloride concentration of about 0.01 mol / L obtained by dividing the initial 0.027 mol / L by the dilution ratio of 2.7. Become. This sodium chloride concentration (0.01 mol / l) is very close to the upper limit of the fresh water (0.0085 mol / l), and it is considered that the effect on the environment after use is extremely small.

Further, the electrolyzed functional water of the final product obtained in Example 1 has an effect that chlorine gas is hardly generated since the pH is high. Since chlorine gas has a pungent odor and corrodes metals, it is possible to prevent a user from feeling uncomfortable or corroding metal parts of the device due to the difficulty in generating the chlorine gas.

[0042]

Embodiments 2 to 4 Next, the dilution ratio of the electrolysis functional water of the intermediate product with the raw water not containing sodium chloride supplied from the dilution water conduit 22 was varied between 2.5 and 2.7 times. Produced electrolyzed functional water under exactly the same conditions as in Example 1. Table 2 shows the results. The fluctuation of the electrolysis power is due to the change in the electrical conductivity (resistance) depending on the temperature of the aqueous solution of sodium chloride.

[0043]

[Table 2]

From Table 2, it is clear that even if the dilution ratio is changed, the same electrolytically functional water as in Example 1 can be obtained.

Next, a bactericidal test against various bacteria was carried out using acidic electrolyzed functional water having a residual chlorine concentration of 30.0 ppm and a pH of 3.22 obtained under the same conditions as in the above Examples. The sterilization test was performed by contacting a plate inoculated with a predetermined amount of the test bacteria with the electrolytically functional water and counting the number of surviving bacteria 30 seconds and 1 minute later. Was the test result. Table 3 shows the results.

[0046]

[Table 3]

From Table 3, it is clear that the electrolyzed functional water of the present embodiment can obtain a sufficient bactericidal effect against the bacteria.

In the present embodiment, the electrolyzed functional water is produced by electrolyzing an aqueous solution of sodium chloride. However, an aqueous solution of another chloride such as potassium chloride may be electrolyzed. In the present embodiment, the electrodes 6 and 7 carry an electrocatalyst mainly composed of platinum and iridium oxide. However, the electrocatalyst may be mainly composed of platinum and ruthenium.

Further, the electrolyzed functional water producing apparatus 1 of the present embodiment
Then, the raw water conduit 11 and the dilution water supply conduits 22 and 23 are connected by the bypass conduit 24, and the electrolyzed functional water (intermediate product) obtained in the electrolytic cell is the same as that used for preparing the aqueous sodium chloride solution. Although the dilution is performed with the raw water containing no, the dilution water supply conduits 22 and 23 may be connected to another supply source of the water containing no sodium chloride.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing one configuration example of an apparatus for producing electrolyzed functional water of the present invention.

FIG. 2 is a graph showing the relationship between chloride concentration of raw water and electrolysis power.

FIG. 3 is a graph showing the relationship between residual chlorine concentration and electrolysis power.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electrolysis functional water production apparatus, 2 ... Electrolysis tank, 3,4 ... Electrode, 5 ... Diaphragm, 6,7 ... Electrolysis chamber, 11 ... Raw water supply means, 15 ... Chloride addition means, 16, 17 ... Electrolysis functional water Take-out means, 22, 23 ... dilution water supply means.

Claims (3)

[Claims] An ion permeable diaphragm is provided between a pair of electrodes arranged opposite to each other, an aqueous chloride solution is supplied to an electrolytic cell separated into two electrolytic chambers by the diaphragm, and a voltage is applied between both electrodes. To perform electrolysis of the aqueous chloride solution to obtain electrolyzed functional water having a bactericidal effect from the electrolysis chamber on the anode side of the electrolyzer, wherein chloride is added to the raw water. An aqueous chloride solution having a concentration of 025 mol / liter or more is prepared, and the aqueous chloride solution is supplied to the electrolytic chamber provided with an electrode supporting a catalyst containing platinum, iridium and / or ruthenium as a main component, and electrolyzed. A method for producing electrolyzed functional water, comprising diluting the electrolyzed functional water obtained from the anode-side electrolysis chamber so that the effective residual chlorine is in the range of 30 to 50 ppm. 2. An ion permeable diaphragm is provided between a pair of electrodes opposed to each other and supporting a catalyst mainly composed of platinum and iridium and / or ruthenium, and separated into two electrolytic chambers by the diaphragm. An electrolytic cell formed, raw water supply means for supplying raw water to the electrolytic cell, and chloride adding means for adding chloride to the raw water to prepare a chloride aqueous solution having a concentration of 0.025 mol / liter or more. An electrolysis function water extracting means for extracting the electrolysis function water generated from both electrolysis chambers; and supplying diluting water to the electrolysis function water extracted from the anode-side electrolysis chamber so that the effective residual chlorine concentration is in the range of 30 to 50 ppm. And a diluting water supply means for diluting the functional water. 3. The apparatus for producing electrolyzed functional water according to claim 2, wherein said dilution water supply means supplies said raw water as said dilution water.