JP2015196871A - Apparatus and method for production of radical oxygen water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for production of radical oxygen water which has long lifes of electrodes and a solid electrolyte membrane and enables efficient production of high-concentration radical oxygen water.SOLUTION: A production apparatus for radical oxygen water includes a raw material water supply part 11, an electrolytic solution supply part 10 and an electrolysis part, and the electrolysis part includes a solid electrolyte membrane 8 having a first surface and a second surface located opposite to the first surface, an anode part A which is provided on the side of the first surface and arranged so as to come in contact with raw material water supplied from the raw material water, a cathode part C which is provided on the side of the second surface and arranged so as to come in contact with an electrolytic solution supplied from the electrolytic solution supply part 10, an electrolysis cell 1 housing the solid electrolyte membrane 8, the anode part A and the cathode part C, means of applying a voltage to between the cathode part C and the anode A, and means of setting the pressure of the anode part A to be 0.2 MPa or higher.

Description

  The present invention relates to a radical oxygen water production apparatus and a radical oxygen water production method. More specifically, the present invention relates to an apparatus and method for producing radical oxygen water containing oxygen radicals at a high concentration.

  Radical oxygen water can be produced by electrolyzing water. Various radical oxygen water production apparatuses utilizing this electrolysis have been proposed.

  For example, Patent Document 1 discloses that a casing is partitioned into an anode chamber and a cathode chamber by a solid electrolyte membrane, and an anode electrode having a noble metal having an ozone generation catalyst function on the surface of the solid electrolyte membrane on the anode chamber side is provided on the cathode chamber side. A cathode electrode is provided in pressure contact with the solid electrolyte membrane surface, an inlet and an outlet are provided in each of the anode chamber and the cathode chamber, and a DC voltage is applied between the anode electrode and the cathode electrode. In the radical oxygen water production apparatus, there is disclosed a radical oxygen water production apparatus characterized in that one or both of the anode electrode and the cathode electrode are provided so as to be capable of being pressed and detached with respect to the solid electrolyte membrane by the advance / retreat driving means. ing.

  In Patent Document 2, a solid electrolyte membrane having a first surface and a second surface opposite to the first surface, water provided in contact with the first surface on the first surface side. , A cathode provided on the second surface side away from the second surface, and a flow path provided between the cathode and the second surface and in which an electrolyte can be interposed There is disclosed a water electrolysis apparatus in which the pressure of the electrolytic solution on the second surface side is higher than the pressure of the water on the first surface side.

  In Patent Document 3, a part or all of the peripheral surface of the ozonizer main body having a circular cross section is formed on the inner surface of an ion exchange membrane, which is made of a metal such as platinum having an ozone generation catalytic function and having a porous surface shape such as a wire mesh. An electrode is formed, and an outer surface of the ion exchange membrane is formed of an electrolysis generation surface in which a cathode electrode made of a corrosion-resistant metal and made of a porous surface such as a wire mesh is formed, and the ozonizer body includes a raw water inlet and a radical. An oxygen water outlet and a swirl flow generator that swirls the raw water in the main body of the ozonizer so that the swirling raw material water is pressed against the electrolysis surface by centrifugal force. An electrolytic radical oxygen water production apparatus is disclosed.

Japanese Patent Laid-Open No. 11-172482 JP 2010-059514 A JP 2003-88866 A

  An object of the present invention is to provide an apparatus and a method for efficiently producing high-concentration radical oxygen water with a long life of an electrode and a solid electrolyte membrane.

As a result of investigations to achieve the above object, the present invention including the following modes has been found.
[1] A raw material water supply unit, an electrolyte solution supply unit, and an electrolysis unit,
A solid electrolyte membrane in which the electrolysis unit has a first surface and a second surface on the opposite side of the first surface, and the raw water supplied from the raw water supply unit provided on the first surface side contacts An anode part arranged so as to accommodate, a cathode part provided on the second surface side and arranged so as to contact an electrolyte supplied from an electrolyte supply part, a solid electrolyte membrane, an anode part, and a cathode part An apparatus for producing radical oxygen water, comprising: an electrolytic cell, a means for applying a voltage between a cathode part and an anode part, and a means for setting the pressure of the anode part to 0.2 MPa or more.

[2] The anode part has an anode layer made of a conductive porous body, a conductive network or a conductive fiber assembly, the anode layer is in contact with the solid electrolyte membrane, and is supplied from the raw water supply part Raw material water passes through the voids in the anode layer, the cathode portion has a cathode layer made of a conductive porous body, a conductive network or a conductive fiber assembly, and the cathode layer is in contact with the solid electrolyte membrane. The apparatus for producing radical oxygen water according to [1], wherein the electrolytic solution supplied from the electrolytic solution supply section passes through the voids in the cathode layer.
[3] Electrolysis that further includes a dielectric layer made of a non-conductive porous body, a non-conductive net-like body, or a non-conductive fiber assembly between the cathode portion and the solid electrolyte membrane, and is supplied from the electrolyte solution supply section The radical oxygen water production apparatus according to [2], wherein the liquid passes through the gap in the cathode layer and the gap in the dielectric layer.

[4] The radical oxygen water production apparatus according to any one of [1] to [3], wherein the means for increasing the pressure of the anode part is a pressure pump.
[5] The radical oxygen water production apparatus according to any one of [1] to [4], wherein the means for applying a voltage is a power supply device capable of applying a DC voltage continuously or intermittently.

[6] A solid electrolyte membrane having a first surface and a second surface on the opposite side of the first surface, an anode portion provided on the first surface side, a cathode portion provided on the second surface side, And an apparatus having an electrolytic cell that accommodates a solid electrolyte membrane, an anode portion, and a cathode portion,
Supply raw water so as to contact the anode part at a pressure of 0.2 MPa or more,
Supply electrolyte so that it contacts the cathode,
A method for producing radical oxygen water comprising applying a voltage between a cathode part and an anode part to generate radical oxygen water from raw material water.
[7] The method for producing radical oxygen water according to [8], wherein the electrolytic solution is supplied so as to be in contact with the cathode portion at a pressure of 0.2 MPa or more.

  According to the radical oxygen water production apparatus or the radical oxygen water production method according to the present invention, a large amount of high concentration radical oxygen water can be produced in a short time. According to the present invention, oxidation deterioration in the anode part and deterioration of the solid electrolyte membrane are suppressed, so that the conversion efficiency to radical oxygen water is maintained high.

It is a schematic sectional drawing which shows the structure of the radical oxygen water manufacturing apparatus which concerns on one Embodiment of this invention. It is a schematic sectional drawing which shows the structure of the radical oxygen water manufacturing apparatus which concerns on other one Embodiment of this invention.

  The radical oxygen water production apparatus and radical oxygen water production method of the present invention will be described with reference to FIG. 1 or FIG. In addition, this invention is not limited only to the form drawn on the figure. The scope of the present invention includes modifications, additions, or omissions of the respective parts within the scope of the present invention.

The radical oxygen water production apparatus according to an embodiment of the present invention includes a raw water supply unit (11), an electrolyte solution supply unit (10), and an electrolysis unit.
The electrolysis part comprises a solid electrolyte membrane (8), an anode part (A), a cathode part (C), an electrolysis cell (1), means for applying a voltage between the cathode part and the anode part, Means for increasing the pressure of the anode part. A solid electrolyte membrane, an anode part, and a cathode part are accommodated in the electrolytic cell (1).

  The raw material water supply section (11) is not particularly limited as long as it can supply raw water to the electrolysis cell (1). The raw water supply unit (11) usually has a water source, a pump, and piping. As the raw water, fresh water such as tap water, river lake water, and groundwater can be used. Among these, tap water is preferable from the viewpoint of safety and hygiene and convenience. The water source may be a tank provided in the radical oxygen water production apparatus, and the raw water may be stored in the tank, or the raw water is supplied to the radical oxygen water production apparatus from a water supply facility by a hose or the like. It may be the one.

  A filter, a sedimentation tank, etc. can be provided in the middle of the piping in the raw water supply unit (11) to remove impurities and suspended matters. Examples of the filter include a cation exchange resin filter, an anion exchange resin filter, an activated carbon filter, and a calcium sulfite filter. When a cation exchange resin filter is used, for example, minerals such as calcium and magnesium can be removed from the raw water. Minerals may stick to the electrode and cause the electrode to deteriorate. The temperature of the raw material water is preferably 0 to 45 ° C, more preferably 10 to 40 ° C in the electrolytic cell.

The electrolytic solution supply unit (10) is not particularly limited as long as it can supply the electrolytic solution to the electrolytic cell (1). The electrolytic solution supply unit (10) usually includes an electrolytic solution preparation unit, a pump, and piping.
The electrolytic solution can be prepared by dissolving an electrolyte compound or a high concentration electrolytic solution in fresh water or diluting with fresh water. The high concentration electrolytic solution may be diluted with fresh water before entering the electrolytic cell (1), or may be diluted in the electrolytic cell (1). As a method of diluting in the electrolytic cell, for example, between the solid electrolyte membrane (8) accommodated in the electrolytic cell and the cathode part (C) or between the dielectric layer (9) and the cathode part (C). The porous membrane (22) is provided as a partition, fresh water is supplied to the cathode portion (C) side of the porous membrane, and a high concentration electrolyte is supplied to the solid electrolyte membrane (8) side of the porous membrane, The electrolyte solution concentration in the cathode part can be set to a predetermined value by allowing the high-concentration electrolyte solution to penetrate into the cathode part (C) through the porous membrane (FIG. 2). If it does in this way, the efficiency of electrolysis can be raised and degradation of a cathode part can be controlled. In addition, the fresh water used for dilution may be supplied by an original supply means, or a part of the raw water supplied from the raw water supply unit may be divided and supplied. For example, a porous fluororesin film (such as an omnipore film) is used for the porous film (22).

  As the electrolyte compound, alkali metal chlorides such as NaCl, KCl, LiCl, hydrogen chloride, or hydrochloric acid are preferably used. In addition, the electrolytic solution used has a chloride ion concentration of preferably 10 mg / L or more and a saturation concentration, more preferably 50 mg / L or more and a saturation concentration or less, and further preferably 100 mg / L or more and a saturation concentration or less. When the chlorine ion concentration is high, the oxidative deterioration of the anode layer is suppressed and the current efficiency is maintained high.

  Moreover, in order to improve electrical conductivity, you may add another electrolyte material to electrolyte solution. For example, a material that generates nitrate ions or sulfate ions can be used. Examples of such materials include nitric acid, sulfuric acid, sodium nitrate, or sodium sulfate. Furthermore, in order to stabilize the pH of the electrolytic solution, the electrolytic solution may be a buffer solution. For example, by adding boric acid + sodium borate, phosphoric acid + sodium phosphate, acetic acid + sodium acetate, or citric acid + sodium citrate to an aqueous solution of NaCl, the electrolyte can be used as a buffer solution. The electrolytic solution may contain halogen ions other than chlorine ions, but the concentration is preferably 10 mg / L or less. Addition of an acid that forms a metal complex to the electrolytic solution is preferable because it can suppress the deposition of a substance on the surface of the cathode portion. Examples of the acid that forms the metal complex include organic acids such as acetic acid, citric acid, and ascorbic acid.

  The electrolytic solution may be circulated as described later. In such a case, it is preferable to contain an algaeproofing agent, a disinfectant, etc. in electrolyte solution. Moreover, the radical oxygen water produced | generated by the anode part can also be supplied to a cathode part, and a cathode part can also be cleaned. The temperature of the electrolytic solution is preferably 0 to 45 ° C, more preferably 10 to 40 ° C in the electrolytic cell.

  The solid electrolyte membrane (8) is installed between the anode part and the cathode part in the electrolytic cell. An anode portion is disposed on the first surface side of the solid electrolyte membrane, and a cathode portion is disposed on the second surface side of the solid electrolyte membrane. As the solid electrolyte membrane, a proton conductive film (H-type ion exchange membrane) is preferably used. Examples of the proton conductive film include a sulfonic acid type strongly acidic cation exchange resin and a perfluorosulfonic acid polymer film. As a commercial product, a Nafion membrane (registered trademark: manufactured by DuPont) can be exemplified. The thickness of the solid electrolyte membrane is preferably 0.05 to 0.5 mm, more preferably 0.1 to 0.3 mm. The end of the solid electrolyte membrane is in close contact with the inner wall of the electrolysis cell, blocking between the anode side and the cathode side, and only the exchange of ions and electrons through the solid electrolyte membrane is between the anode and cathode. It is preferable to be performed in the above.

  The anode part (A) is installed on the first surface side of the solid electrolyte membrane between the raw water inlet of the electrolytic cell and the radical oxygen water outlet. The anode part preferably has an anode electrode (5) and an anode layer. The anode electrode is a portion connected to the anode of the DC power supply, and is composed of a conductive plate such as titanium, for example. The anode layer is preferably composed of a conductive porous body, a conductive network or a conductive fiber assembly. The raw water can pass through voids in the anode layer (for example, pores in the porous body, meshes or fiber gaps). Bubbles (mainly oxygen or ozone) that may be generated by electrolysis can be dissolved in the raw water while passing through the complex shaped voids. For the anode layer, for example, a titanium mesh or a platinum mesh is used. As the titanium mesh, those having a wire diameter of 0.4 to 0.6 mmφ and a mesh size of 30 to 70 are preferably used. As the platinum mesh, those having a wire diameter of 0.05 to 0.1 mmφ and a mesh size of 60 to 100 are preferably used. The anode layer is placed in contact with the anode electrode, and direct current electricity is transmitted to the anode layer through the anode electrode. The anode layer is disposed in contact with the solid electrolyte membrane (8). The anode layer preferably has a mesh size on the anode electrode side smaller than the mesh size on the solid electrolyte membrane side. In the apparatus shown in FIG. 1, a first anode layer (7) made of platinum mesh, a second anode layer (6) made of titanium mesh, and an anode electrode (5) made of titanium are installed in the anode portion.

  The cathode part (C) is disposed between the electrolyte solution inlet and the electrolyte outlet of the electrolytic cell on the second surface side of the solid electrolyte membrane. The cathode part preferably has a cathode electrode (4) and a cathode layer. The cathode electrode is a portion connected to the cathode of the DC power supply, and is made of a conductive plate such as stainless steel, for example. In order to escape bubbles (mainly hydrogen) that may be generated by electrolysis, a groove may be formed on the cathode layer side surface of the cathode electrode, or a through hole may be formed in the cathode electrode. Good. The cathode layer is preferably composed of a conductive porous body, a conductive network, or a conductive fiber assembly. The electrolytic solution can pass through voids in the cathode layer (for example, pores of a porous body, meshes or fiber gaps). Bubbles that may be generated by electrolysis can be dissolved in the electrolyte while passing through a complex shaped gap. For the cathode layer, for example, a stainless steel mesh or a platinum mesh is used. As the stainless steel mesh, those having a wire diameter of 0.4 to 0.6 mmφ and a mesh size of 30 to 70 are preferably used. As the platinum mesh, those having a wire diameter of 0.05 to 0.1 mmφ and a mesh size of 60 to 100 are preferably used. The cathode layer is placed in contact with the cathode electrode, and direct current electricity is transmitted to the cathode layer through the cathode electrode. The cathode layer preferably has a mesh size on the cathode electrode side smaller than that on the solid electrolyte membrane side. In the apparatus shown in FIG. 1, the cathode part is provided with a first cathode layer (2) made of platinum mesh, a second cathode layer (3) made of stainless steel mesh, and a cathode electrode (4) made of stainless steel. .

  The cathode layer is preferably disposed so as not to contact the solid electrolyte membrane (8). As the distance d between the cathode layer and the solid electrolyte membrane increases, the deterioration of the solid electrolyte membrane decreases, but the power loss tends to increase. Therefore, the lower limit of the distance d is preferably a distance that produces a potential difference that is 1/10 times the potential difference ΔV that occurs between the cathode side and the anode side of the solid electrolyte membrane. The upper limit of the distance d is preferably a distance at which a potential difference of four times the potential difference ΔV generated between the cathode portion side and the anode portion side of the solid electrolyte membrane is generated.

  For example, when a sodium chloride aqueous solution having a concentration of 10% by mass (conductivity 121 mS / cm) is used as the electrolyte and a Nafion membrane (registered trademark: manufactured by DuPont) is used as the solid electrolyte membrane, the distance between the cathode layer and the solid electrolyte membrane d can be 0.1 to 4 times the thickness of the Nafion film. The conductivity of the Nafion membrane is about the same as that of a sodium chloride aqueous solution having a concentration of 10% by mass.

  A dielectric layer (9) can be provided between the cathode layer and the solid electrolyte membrane. The dielectric layer is made of, for example, a nonconductive porous body, a nonconductive network, or a nonconductive fiber assembly. The electrolyte also passes through voids in the dielectric layer (for example, pores in the porous body, meshes, or fiber gaps). Examples of the material constituting the dielectric layer include non-conductive inorganic materials such as glass fiber and quartz fiber; non-conductive organic materials such as sponge and cotton. Non-conductive inorganic materials, particularly glass fibers and quartz fibers are preferably used because they are electrochemically stable. The dielectric layer is preferably elastic. When sandwiched between the cathode layer and the solid electrolyte membrane, the solid electrolyte membrane is pressed against the anode layer by the elastic force of the dielectric layer, and the adhesion between the anode layer and the solid electrolyte membrane can be enhanced.

  The raw material water supplied from the raw material water supply unit is allowed to flow to the anode part (A), and the electrolytic solution supplied from the electrolyte solution supply part is allowed to flow to the cathode part. When a voltage is applied between the cathode portion and the anode portion by the voltage application means, water molecules are electrolyzed. The electrolysis of water molecules changes the product depending on the applied voltage. If electric power (voltage, current) used in normal electrolysis is used, oxygen gas is generated at the anode and hydrogen gas is generated at the cathode. If power (high voltage, current) higher than that used in normal electrolysis is used, water containing abundant oxygen radicals (radical oxygen water) is generated at the anode part. The ozone generation reaction includes a reaction in which ozone is generated directly from water molecules (6-electron reaction) and a reaction in which oxygen is first generated from water molecules and the oxygen is changed to ozone (4 + 2 electron reaction). In the present invention, it is preferable to perform electrolysis by 4 + 2 electron reaction because current efficiency can be improved. Examples of the oxygen radical include active oxygen, hydrogen peroxide, ozone, and hydroxyl radical. Further, hydrogen gas or hydrogen radicals are generated at the cathode portion. The generated radical oxygen water (Wo) is discharged from the anode part. Hydrogen gas is discharged to the outside in a state of being dissolved in the electrolytic solution or in the form of bubbles.

  The waste electrolyte solution (D) can be recycled by adjusting the chlorine ion concentration, hydrogen ion concentration, cation concentration, etc., and returning it to the electrolyte supply unit. The ion concentration can be adjusted using, for example, an anion exchange resin or a cation exchange resin. Thereby, the exchange frequency of electrolyte solution can be reduced. The waste electrolyte (D) may be mixed with radical oxygen water generated at the anode part. When mixed in this way, piping for disposal of the waste electrolyte (D) can be omitted.

  The amount of the electrolytic solution supplied from the electrolytic solution supply unit to the cathode part of the electrolytic cell is not particularly limited. / 100,000 or more is preferable. The upper limit is not particularly limited, but is, for example, 1/1 from the viewpoint of cost.

The electrolytic solution supplied from the electrolytic solution supply unit has a pressure of preferably 0.1 MPa or more, more preferably 0.2 MPa or more, still more preferably 0.3 MPa or more, and still more at the cathode portion in the electrolytic cell ( 1 ). The pressure is preferably 0.4 MPa or more, particularly preferably 0.5 MPa or more. The upper limit of the pressure can be set according to the structure and material of the apparatus, the apparatus manufacturing cost, etc., and is not particularly limited. For example, the upper limit can be preferably 50 MPa, more preferably 30 MPa, and even more preferably 10 MPa. As a means for increasing the pressure of the electrolytic solution in the cathode part, for example, a pressure pump, preferably a plunger pump can be mentioned. Moreover, you may provide a valve, a throttle, etc. in the exit side of a cathode part.

  The amount of the raw water supplied from the raw water supply unit to the anode part of the electrolysis cell is not particularly limited, but is preferably an amount such that the average residence time of the raw material water in the anode part is greater than 0 seconds and 10 seconds or less, More preferably, the amount is greater than 0 seconds and less than 7 seconds. By shortening the average residence time of the raw material water in the anode part, fresh raw water can be supplied by quickly flowing out ions and bubbles generated on the anode part side. As a result, the generation efficiency of radical oxygen water in the electrolytic cell can be increased.

The raw water supplied from the raw water supply part has a pressure of preferably 0.2 MPa or more, more preferably 0.3 MPa or more, further preferably 0.4 MPa or more, particularly preferably in the anode part in the electrolytic cell ( 1 ). Is 0.5 MPa or more. The upper limit of the pressure can be set according to the structure and material of the apparatus, the apparatus manufacturing cost, etc., and is not particularly limited. For example, the upper limit is preferably 50 MPa, more preferably 30 MPa, and even more preferably 10 MPa. Examples of means for increasing the pressure of the raw material water in the anode part include a pressurizing pump, preferably a plunger pump. Moreover, you may provide a valve, a throttle, etc. in the exit side of a cathode part.

  When the pressure of the raw material water and the electrolytic solution is increased and the pressure in the electrolytic cell is increased, the radical oxygen is easily dissolved in water, and a high concentration of radical oxygen water is easily obtained. Moreover, if the temperature of raw material water and electrolyte solution is made low, high concentration radical oxygen water will be easy to be obtained. It is preferable that the pressures of the raw water and the electrolytic solution in the electrolytic cell are approximately equal. When one of the pressures is much higher than the other, the solid electrolyte membrane is likely to be damaged. The difference between the pressure of the raw material water in the electrolytic cell and the pressure of the electrolytic solution depends on the strength of the solid electrolyte membrane, but is preferably 1 kPa or less, more preferably 0.5 kPa or less, and even more preferably 0.1 kPa or less. is there.

A DC voltage may be applied continuously or intermittently between the anode part and the cathode part. When the direct current voltage is intermittently applied, the current efficiency is increased, and deterioration of the anode part and the cathode part may be suppressed. The intermittent application of the DC voltage is not particularly limited by the on-off interval. A known power supply device can be used as the voltage applying means. For example, an AC power supply that can supply predetermined power, for example, an AC power supply of 100 V or 200 V, is prepared, and the AC is converted into DC by a converter. The direct current electricity used in the present invention preferably has a voltage of 4 to 20 V, and preferably has a current per unit area of the cell of 0.1 to 5 A / cm ² . This voltage and current facilitate the generation of ozone and active oxygen by reaction at the anode.

The radical oxygen water obtained by the apparatus and method of the present invention has a radical amount of about 10 ¹⁷ / L or more. Therefore, the high-concentration radical oxygen water obtained by the apparatus and method of the present invention can be used after diluted to a predetermined concentration with fresh water.

In the apparatus shown in FIG. 1, raw water having a pressure of 0.4 MPa and a temperature of 20 ° C. is passed through the anode part, and an electrolytic solution having a pressure of 0.4 MPa and a temperature of 20 ° C. is passed through the cathode part (NaCl aqueous solution having a concentration of 0.001 mol / l). And was electrolyzed at a current density of 0.5 A / m ² . The amount of ozone generated was about 8.2 mg / l.

  For comparison, raw material water at a pressure of 0.1 MPa and a temperature of 20 ° C. is passed through the anode part, and an electrolytic solution (a NaCl aqueous solution with a concentration of 0.001 mol / l) at a pressure of 0.1 MPa and a temperature of 20 ° C. is passed through the cathode part. The electrolysis was performed under the same conditions as above except that. The amount of ozone generated was about 6.7 mg / l.

  The present invention is not limited to the above-described embodiment, and it is obvious that modifications and changes can be made without departing from the scope and spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Electrolysis cell C Cathode part 2 1st cathode layer (platinum mesh)
3 Second cathode layer (stainless steel mesh [60 mesh])
4 Cathode electrode (stainless steel)
A Anode part 5 Anode electrode (titanium)
6 Second anode layer (titanium mesh [40 mesh])
7 First anode layer (platinum mesh)
8 Solid electrolyte membrane (ion exchange membrane)
9 Dielectric layer (quartz felt)
10 Electrolyte Supply Unit 11 Raw Material Water Supply Unit 22 Porous Membrane D Drained Electrolyte W _O Radical Oxygen Water

Claims (7)

It has a raw water supply part, an electrolyte supply part, and an electrolysis part,
The electrolysis part is
A solid electrolyte membrane having a first surface and a second surface opposite the first surface;
An anode part provided on the first surface side and arranged so that the raw water supplied from the raw water supply part contacts,
A cathode part provided on the second surface side and arranged so that the electrolyte supplied from the electrolyte supply part contacts,
An electrolytic cell containing a solid electrolyte membrane, an anode part and a cathode part,
Means for applying a voltage between the cathode part and the anode part, and means for making the pressure of the anode part 0.2 MPa or more,
Radical oxygen water production equipment. The anode part has an anode layer made of a conductive porous body, a conductive network or a conductive fiber assembly,
The anode layer is in contact with the solid electrolyte membrane;
The raw water supplied from the raw water supply part passes through the voids in the anode layer,
The cathode part has a cathode layer made of a conductive porous body, a conductive network or a conductive fiber assembly,
2. The radical oxygen water according to claim 1, wherein the cathode layer is not in contact with the solid electrolyte membrane, and the electrolyte supplied from the electrolyte supply unit passes through the voids in the cathode layer. manufacturing device. A dielectric layer comprising a non-conductive porous body, a non-conductive network or a non-conductive fiber assembly between the cathode portion and the solid electrolyte membrane, and the electrolyte supplied from the electrolyte supply section The radical oxygen water production apparatus according to claim 2, which passes through a gap in the cathode layer and a gap in the dielectric layer.   The radical oxygen water production apparatus according to any one of claims 1 to 3, wherein the means for increasing the pressure of the anode part is a pressure pump.   The radical oxygen water production apparatus according to any one of claims 1 to 4, wherein the means for applying a voltage is a power supply device capable of applying a DC voltage continuously or intermittently. A solid electrolyte membrane having a first surface and a second surface on the opposite side of the first surface, an anode portion provided on the first surface side, a cathode portion provided on the second surface side, and a solid electrolyte In an apparatus having an electrolysis cell containing a membrane, an anode part, and a cathode part,
Supply raw water so as to contact the anode part at a pressure of 0.2 MPa or more,
Supply electrolyte so that it contacts the cathode,
A method for producing radical oxygen water comprising applying a voltage between a cathode part and an anode part to generate radical oxygen water from raw material water.   The method for producing radical oxygen water according to claim 6, wherein the electrolytic solution is supplied so as to be in contact with the cathode portion at a pressure of 0.2 MPa or more.

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