JP6366360B2 - Method for producing electrolytic reduced water containing hydrogen molecules and apparatus for producing the same - Google Patents

Description

  The present invention relates to a method for producing electrolytic reduced water containing hydrogen molecules and an apparatus for producing the same.

The human body takes in oxygen molecules (O ₂ ), reduces it to water by reducing substances derived from food in mitochondria, and uses the energy generated at that time. In this process, some oxygen molecules are converted to active oxygen (O ₂ ⁻ ). Active oxygen is an unstable substance, and using this substance as a starting material, hydroxyl radicals (OH.) Are generated and tend to deprive electrons from human DNA and stabilize it. Hydroxy radicals damage DNA, cause arteriosclerosis, are involved in the development of cancer, and are a major factor in lifestyle-related diseases.

  Recently, it has been reported in Non-Patent Document 1 that Prof. Shigeo Ota of Nippon Medical School, Institute of Gerontology, reduces the active oxygen in the human body by hydrogen molecules. A research team at the university conducted experiments with rat neurons cultured in test tubes, and confirmed that a solution with a hydrogen concentration of 1.2 ppm reduced active oxygen and made it nontoxic. Since hydrogen easily penetrates into the cell nucleus, it can be expected to protect the gene from attack by active oxygen.

  Therefore, attention has been focused on a technique for efficiently and safely generating hydrogen molecule-dissolved water at a low cost. The generation method of hydrogen molecule dissolved water is roughly divided into the following two.

(1) Method of dissolving hydrogen gas in water under high pressure (2) Method of generating hydrogen molecules directly in water by cathode electrolysis using an electrolytic cell

  Although the hydrogen gas dissolving method (1) is easy as a method, a pressure vessel for dangerous materials is required, which is not simple and expensive. Furthermore, since hydrogen gas is a dangerous material, it is difficult to use a hydrogen gas cylinder at home.

  It is promising to use the electrolytic method (2) as an apparatus for generating hydrogen molecule-dissolved water at low cost for home use. As an electrolysis apparatus for home use, an alkali ion water generator has been generally used. The purpose of the alkaline ionized water generator is to generate weak alkaline water having a pH of 7 to 8.5 by electrolyzing tap water or the like in order to cope with gastric hyperacidity.

  It is promising to use the electrolytic method (2) as an apparatus for generating hydrogen molecule-dissolved water at low cost for home use. As an electrolysis apparatus for home use, an alkali ion water generator has been generally used. The purpose of the alkaline ionized water generator is to generate weak alkaline water having a pH of 7 to 8.5 by electrolyzing tap water or the like in order to cope with gastric hyperacidity. As shown in FIG. 1, this type of apparatus incorporates a two-chamber electrolyzer divided into two chambers of an anode chamber 10 having an anode electrode 9 and a cathode chamber 4 having a cathode electrode 7 by a diaphragm 8. . The water to be treated is supplied from the anode chamber inlet 11 and the cathode chamber inlet 5 and electrolyzed at the anode electrode 9 and the cathode electrode 7, and the electrolyzed water is discharged from the anode chamber outlet 12 and the cathode chamber outlet 6. In this case, since the diaphragm 5 and the electrodes (the anode electrode 4 and the cathode electrode 9) are separated from each other, it is essential that the electrolyte supplied in the water supplied to the electrolytic cell is energized. However, 100 to 200 ppm of alkali metal ions such as sodium and anions such as chlorine are dissolved in tap water, and the following reaction can be considered in the case of tap water in which sodium and chlorine are dissolved.

Reaction at the anode electrode
_{^{2Cl - - 2e - → Cl 2}} (1)
^{_{2H 2 O - 4e - → O}} 2 + 4H + (2)

Reaction at cathode electrode
^{2Na + + 2e - → 2Na (} 3)
^{_{2Na + 2H 2 O → 2Na +}} + H 2 + 2OH - (4)
^{_{2H 2 O + 2e - → H}} 2 + 2OH - (5)

  As can be seen from the above reaction formula, alkaline water in which hydrogen molecules are dissolved is obtained in the cathode electrolyzed water discharged from the cathode chamber 6. In order to make the generated electrolyzed water available for drinking, there is a limit to the pH in the water supply law, and it is required to make the pH 8.5 or less.

When the two-chamber electrolytic cell shown in FIG. 1 is used, there is a high possibility that the pH will be 8.5 or more when strong electrolysis is performed, and cathode electrolyzed water that is not suitable for drinking is generated. Further, if the pH is lowered to, for example, an electrolysis current of 0.05 A / cm ² or less in order to lower the pH, the hydrogen molecule concentration naturally decreases, so that the effect of hydrogen molecules cannot be expected. As described above, the conventional two-chamber electrolytic cell shown in FIG. 1 is not suitable as an apparatus for producing dissolved hydrogen drinking water for drinking water, and is classified into the category of alkaline ionized water apparatus. As a standard for the alkaline functional water generator, a pH range of 9 to 10 is generally set. In the alkaline ionized water apparatus currently sold, when the dissolved hydrogen molecule concentration is set to 0.8 ppm or more, strong electrolysis is required, and at that time, the pH exceeds 10. It is known that when alkaline water having a pH of 10 or higher is ingested, the pH of blood shifts to the alkaline side. As a result, strong electrolysis is not preferable in the case of an alkaline ionized water apparatus. This indicates that it is necessary to improve the electrolytic cell and the electrolytic method.

Matsushita Electric Works Technical Report, vol.56, No.1 P. Choi: Investigation of Thermodynamic and Transport Properties of Proton-Exchange Membranes in Fuel Cell Application

  However, home electrolyzers often have a current / voltage of about 3 A × 30 V in order to reduce costs.

  In electrolysis using an electrolyzer with a current / voltage of about 3 A x 30 V, the proportion of hydrogen molecules that are dissolved hydrogen in the generated hydrogen molecules is small, and the concentration of dissolved hydrogen contained in the electrolyzed water obtained by conventional home electrolyzers Is as low as 0.6 to 0.8 ppm.

  However, since the market demand is 1.0 ppm or more, it is necessary to increase the dissolved hydrogen concentration based on the current electrolysis conditions.

  The problem to be solved by the present invention is to provide an electrolysis method capable of obtaining electrolyzed water having a dissolved hydrogen concentration of 1.0 ppm or more and an apparatus for producing the same.

  The present invention relates to a method for producing hydrogen molecule-dissolved water in which hydrogen molecules are dissolved by electrolyzing raw water using an electrolytic cell having an anode chamber having an anode electrode and a cathode chamber having a cathode electrode. The cathode chamber is divided by a diaphragm made of a fluorine-based cation exchange membrane, and an anode electrode having a plurality of through holes is closely attached to the diaphragm, and in order to increase the concentration of dissolved hydrogen molecules, the current density at the cathode electrode is low. In view of the above, it is preferable that the cathode electrode having an area larger than the anode electrode area is supplied with water having a cathode head pressure of 5 cm or more and an electric conductivity of 250 μS / cm or less. The present invention relates to a method for producing hydrogen molecule-dissolved water having a pH of 9.5 or less and a dissolved hydrogen molecule concentration of 1.0 ppm or more.

  According to the present invention, hydrogen molecule-dissolved water having a pH of 3 to 9.5 and a dissolved hydrogen molecule concentration of 1.0 ppm or more suitable for drinking can be produced.

The structure schematic diagram of the conventional two-chamber electrolytic cell. Chemical structural formula of the fluorinated cation exchange membrane of the diaphragm. The structure schematic diagram of a two-chamber electrolytic cell. The front view of a plate-shaped porous electrode. The model explanatory drawing of the condition of the cathode electrode surface at the time of electrolysis. The model explanatory drawing of the relationship between a bubble diameter and a pressure. The model explanatory drawing of the cathode reaction in the cathode electrode surface. The structure schematic diagram of a two-chamber electrolytic cell. The front view of a plate-shaped porous electrode. The structure schematic diagram of a two-chamber electrolytic cell. The graph which shows the relationship between the dissolved hydrogen molecule concentration in the produced | generated cathode electrolyzed water, and a cathode electrode area. FIG. 4 is a flowchart of a test apparatus used in Example 2. The graph which shows the relationship between the pressure of a cathode chamber, and dissolved hydrogen molecule concentration. FIG. 6 is a structural schematic diagram of a two-chamber electrolytic cell of Example 3. The graph which shows the relationship between a cathode electrode and dissolved hydrogen molecule concentration. The basic system flow figure for the drinking water dispenser of Example 4. FIG. The structure schematic diagram of the electrolytic cell which provided the intermediate chamber. The basic system flow figure of a drinking water dispenser. The graph which shows the relationship between electrolysis time and electrolysis voltage. The basic system flow figure of the drinking water dispenser of Example 7. FIG.

  In order to increase the dissolved hydrogen molecule concentration, it is necessary to increase the cathode electrode area as compared with the anode electrode in order to reduce the current density at the cathode electrode.

  As described above, in order to increase the concentration of dissolved hydrogen molecules, it is obvious that basically it is necessary to increase the electrolysis current. However, when Ca, Mg, etc. are dissolved in the raw material water for cathode electrolysis and the electrolysis current is further increased, the pH of the cathode electrolysis water becomes alkaline. Alkaline pH> 10 makes it unsuitable for beverages. In order to prevent the pH from becoming alkaline in this way, the pH of the cathode electrolyzed water must be 10 or less even if the electrolysis current is increased by excluding Na, Ca, Mg ions, etc. from the raw water. It is. The method of excluding Na, Ca, Mg ions, etc. to make the conductivity 250 μS / cm or less is roughly divided into the following two methods.

(1) Use a special electrolytic cell.

  In general, as shown in FIG. 1, an electrolytic cell in which an anode and a cathode are arranged on both sides of a diaphragm is used as an electrolytic cell for the purpose of improving the dissolved hydrogen concentration. When producing the aforementioned alkaline water, the electrolytic cell shown in FIG. 1 is often used. In this case, in order to reduce the electrolysis voltage and improve the electrolysis efficiency, the conductivity is desirably 100 μS / cm or less. In general, when tap water is used as raw water, Na, Ca, Mg ions, etc. that contribute to conductivity are dissolved. These positive ions and the like move to the cathode chamber together with electrolysis, and change the pH of the cathode electrolyzed water to alkaline.

In order to prevent the pH of the electrolyzed cathode electrolyzed water from shifting to alkaline as much as possible, it is necessary to remove ionic impurities such as positive ions from the raw water. In that case, the electrolysis voltage is improved with the removal of impurities, and the electrolysis efficiency is greatly reduced. In order to electrolyze raw water having a conductivity of 100 μS / cm or less, the fluorine-based cation exchange membrane shown in FIG. 2 was used as a diaphragm. An electrolytic cell as shown in FIG. 3 is desirable in which the porous cathode electrode and anode electrode shown in FIG. 4 are in close contact with both sides of the diaphragm having the structure shown in FIG. The characteristics of the cation exchange membrane are detailed in the following materials. The basic mechanism is that when polyolefin or vinyl chloride is bonded to a base resin with an ion effect group —SO ₃ H, the degree of dissociation of H ⁺ ions is small, so the conductivity in the ion exchange membrane is small and the electrolysis voltage is large. However, the H ⁺ ion of the —SO ₃ H group bonded in the fluorine-based cation exchange membrane is easily dissociated, and the electrolysis voltage is reduced to 20 volts or less. Furthermore, since the positive ion concentration in the raw material water supplied to the anode chamber is reduced, the pH of the cathode electrolyzed water is not likely to be strongly alkaline even after electrolysis.

(2) Use filters.

  It is necessary to filter the raw water. Specifically, it is suitable to use an ion exchange resin tower or a reverse osmosis membrane filter. A reverse osmosis membrane filter is preferable for extending the filter processing time.

Figures 5 (a) and 5 (b) show the state of hydrogen molecular bubbles generated by electrolysis. The smaller the radius r, the higher the internal pressure P, and from Henry's law shown in equation (7) Since gas dissolves in proportion to pressure, the concentration of dissolved gas at the gas-liquid interface is considered to be higher for smaller bubbles. Here, γ is the surface tension, C _{S is} the dissolved concentration of the gas, P _{0 is} the pressure outside the gas, and κ is the Henry constant.

(6) ΔP = P−P ₀ = 2γ / r
P = P ₀ + 2γ / r
(7) C _S = κP

When the pressure inside the electrolytic cell cathode chamber, based on the equation (6), here, the pressure P ₀ outside the hydrogen molecule gas increases, the dissolved hydrogen molecule concentration increases as can be seen from equation (7).

  The following problems will be described with respect to the cathode electrode structure for increasing the dissolved hydrogen molecule concentration, which is the object of the present invention. First, it is necessary to consider the definition of dissolved hydrogen molecule concentration. In the present invention, hydrogen molecules that are ingested and absorbed by the human body are targeted. In order to be absorbed by the human body, it is necessary to pass through at least the cell membrane. The portable dissolved hydrogen meter manufactured by TOA DK Corporation uses a diaphragm type polarogram electrode. That is, only dissolved hydrogen molecules that have passed through the diaphragm made of a polymer film are measured by the polarogram electrode method. Thus, in order for hydrogen molecular bubbles to pass through the polymer film, the bubble diameter needs to be 1 μm or less. In the present invention, hydrogen molecular bubbles that can be measured with a portable dissolved hydrogen meter are defined as dissolved hydrogen molecules. Furthermore, in order to easily measure the dissolved hydrogen molecule concentration, a platinum colloid solution was used in a methylene blue aqueous solution sold by Mizu Corporation.

  As shown in FIG. 5 (a), the state of the cathode electrode surface during electrolysis will be described. In the diffusion layer on the electrode surface, first, fine bubbles of 1 μm or less are generated. As such small bubbles move away from the electrode surface, they coalesce into large bubbles.

  In the diffusion layer 31 on the cathode pole surface, extremely small hydrogen molecular bubbles 30 are generated, and as the bubbles move away from the diffusion layer, the bubbles repeat coalescence and the bubble size 32 increases. As a result, the dissolved hydrogen molecule concentration decreases.

  As the number density of fine bubbles increases, the possibility of coalescence increases. That is, when the current density is increased, the number density of fine bubbles increases and the probability of bubble coalescence increases. This means that increasing the current density increases the likelihood that the dissolved hydrogen molecule concentration will decrease. This phenomenon is specifically shown in Example 1. FIG. 10 shows the relationship between the electrode area (that is, current density) and the dissolved hydrogen molecule concentration. It can be seen that the concentration of dissolved hydrogen molecules increases when the cathode electrode area is increased and the current density density is decreased.

  FIG. 4 shows a typical example of a plate-like electrode provided with a plurality of through holes (hereinafter referred to as “plate-like porous electrode”). A porous plate electrode shown in FIG. 4 was used as an anode electrode in which it is common to use an electrode having an appropriate hole in the electrode plate. This electrode is a platinum porous electrode made of titanium.

  When it is required that the anode electrode has a long life, a platinum mesh is used. For example, an 80 mesh platinum electrode is used as the anode electrode.

  The electrode shown in FIG. 4 is incorporated in an electrolytic cell suitable for high purity raw material water electrolysis shown in FIG. In this case, the cathode reaction on the cathode electrode surface is schematically shown in FIG. As shown in this figure, dissolved hydrogen molecular bubbles are generated on the back surface of the cathode electrode. These minute hydrogen molecular bubbles coalesce and increase, come out on the electrode surface, and are supplied to the cathode electrolyzed water.

   In this case, it is difficult to increase the dissolved hydrogen molecule concentration. Therefore, it was decided to study a water-permeable electrode other than the plate-like porous electrode.

When categorizing water-permeable electrodes other than plate-like porous electrodes,
(1) Metal fiber assembly
(2) Communicating porous metal like patent No. 1963882
(3) Sintered body of metal fiber aggregate
(4) A granular metal aggregate and the like can be mentioned. Basically, it is necessary to have a water flow function inside the electrode. By adopting this structure, the substantial surface area becomes larger than the outer dimensions of the electrode, and even if the same electrolytic current is applied, the current density is reduced.

   When a metal fiber assembly is used as the cathode electrode, the metal fiber assembly may be brought into close contact with the plate cathode electrode, and electricity may be supplied to the plate cathode electrode.

  Therefore, it was decided to study a fibrous electrode instead of a plate-like porous electrode. FIG. 7 schematically shows an electrolytic cell incorporating a cathode electrode in the form of a metal fiber assembly. A porous anode electrode 9 is brought into close contact with the anode chamber 10 side of the fluorine-based cation exchange membrane 8 which is a diaphragm. On the other hand, the cathode chamber 4 is first provided with a plate-like cathode electrode 7. A water-permeable (porous) cathode electrode using a metal fiber assembly is provided between the plate-like cathode electrode 7 and the diaphragm 8. As described above, when the fiber assembly-like electrode is used, the raw material water can be passed through the fiber. In addition, the surface area of water passing through the metal fiber is larger than that of the outer dimensions of the fiber having a large surface area. This point will be described in Example 1.

As described in Non-Patent Document 1, in the ion exchange group -SO ₃ H in a fluorine-based resin, the bond between -SO ₃ ^- and H ⁺ is relatively weak, and H ⁺ ions tend to dissociate. This dissociated H ⁺ ion contributes to the conductivity. More importantly, since it has an ion exchange group, the moisture inside the ion exchange membrane is easily absorbed. That is, when the fluorine-based cation exchange membrane comes into contact with water, it absorbs moisture and swells. This swelling function facilitates movement of H ⁺ ions inside the membrane, so that the conductivity of the membrane is increased and the electrolysis voltage can be reduced even when high-purity water is used as raw material water.

  As described above, the fluorinated cation exchange membrane has the ability to absorb water. In the electrolytic cell shown in FIG. 7, even if the raw water is not supplied to the anode chamber, a part of the raw water supplied to the cathode chamber is absorbed by the fluorinated cation exchange membrane and supplied to the surface of the anode. Is done. For this reason, electrolysis can be performed without supplying raw water to the anode chamber. As a result, the anode chamber supply water can be saved. In addition, since raw water is not supplied to the anode chamber, the risk of impurity ions such as positive metal ions being concentrated from the anode chamber to the cathode chamber is greatly reduced.

As shown in the electrolytic cell of FIG. 1, when high purity raw material water is supplied to an electrolytic cell having a structure in which the diaphragm and the electrode are separated from each other, if the diaphragm and the electrode are separated, the electrolysis voltage becomes high due to the resistance of the raw material water. The point remained. However, when the anode electrode and the diaphragm are brought into close contact with each other, first, the resistance problem of the raw material water is reduced, and H ⁺ ions are generated by the water oxidation reaction of the formula (2) at the anode electrode. After the H ⁺ ions dissociated in the diaphragm move to the cathode chamber and the cathode electrode, the H ⁺ ions generated at the anode electrode are replenished to the diaphragm, so that the electrolytic reaction continues.

The problem of adhesion between the anode electrode and the diaphragm is particularly important when highly pure water is used as raw water and a fluorine-based cation exchange membrane is used as the diaphragm. After H ⁺ ions dissociated inside the fluorinated cation exchange membrane migrate to the cathode electrode, the H ⁺ ions generated by the water oxidation reaction (2) can be replenished at the anode electrode, and the electrolytic reaction will continue. Become. Thus, as the purity of water increases, the necessity of using a fluorinated cation exchange membrane as a diaphragm increases, and it becomes necessary to make the fluorinated cation exchange membrane and the anode electrode adhere to each other.

  As shown in FIG. 5B, the dissolved hydrogen molecule concentration depends on the external pressure of the hydrogen molecule bubble, and the dissolved hydrogen content concentration changes according to the equation (7). That is, it can be seen that the dissolved hydrogen molecule concentration increases as the pressure in the electrolytic cell cathode chamber increases. As a method of increasing the pressure in the electrolytic cell, the differential pressure between the inlet pressure and the outlet pressure of the electrolytic cell by the supply pump of the raw water is supplied to the cathode chamber. Specifically, a flow rate adjusting valve is provided in the electrolytic cell cathode chamber outlet piping to adjust the pressure in the cathode chamber. The relationship between the dissolved hydrogen molecule concentration and pressure depends not only on the differential pressure but also on the flow characteristics of the electrolyzed water on the cathode electrode surface. If the internal pressure (water head pressure) in the cathode chamber increases slightly, the dissolved hydrogen molecule concentration will increase in principle, but if the target is to exceed 1.0 ppm, which is the object of the present invention, the internal pressure ( It is desirable to set (water head pressure).

  Specifically, it is also affected by the structure of the water-permeable cathode electrode. The relationship between the pressure in the cathode chamber (water head pressure) and the dissolved hydrogen molecule concentration will be described in Example 2.

  In Example 1, the relationship between the current density and the dissolved hydrogen molecule concentration will be described.

  The effect of improving the dissolved hydrogen concentration by the plate-like porous electrode described above will be described in this example. First, a 3 × 12 cm platinum-plated titanium electrode having a shape shown in FIG. 8 was used, and an electrode having 5 × 24 holes formed therein was used. FIG. 3 shows the structure of the electrolytic cell. First, this electrode was used as an anode electrode and a cathode electrode, and was brought into close contact with a fluorine-based cation exchange membrane as a diaphragm. Next, FIG. 9 shows the structure of an electrolytic cell using two cathode electrodes of FIG. In this electrolytic cell, in addition to the cathode electrode 7 that is in close contact with the fluorine-based cation exchange membrane, a second second cathode electrode 75 is disposed behind the cathode electrode 7, and the cathode electrode 7 and the second cathode electrode 75 are connected to the cathode electrode 76. The raw material water was passed between the cathode electrodes. Electricity was supplied to the second cathode electrode 75.

  The raw water was purified from tap water using a reverse osmosis membrane filter. The conductivity of the treated raw water was 9 μS / cm or less.

Further, as shown in FIG. 7, a plate-like porous anode electrode 9 is brought into close contact with the fluorine-based cation exchange membrane 8 on the anode chamber 10 side, and a second cathode electrode 75 for supplying electricity to the cathode chamber side. The metal fiber assembly 72 was brought into close contact therewith. As this metal fiber aggregate, raw material water is passed through 900 g / m ² of fabric weight made of titanium fiber unwoven cloth of 20 μmφ. The concentration of dissolved hydrogen molecules in the case of using one piece of this titanium non-woven cloth and in the case of using two pieces of titanium cloth was compared. Further, in order to efficiently supply the raw material water into the metal fiber assembly cathode electrode 72 installed in the cathode chamber 4, a cathode chamber water baffle plate 41 is additionally provided so that the raw material water does not flow behind the cathode electrode. To do.

  Using these electrolytic cells, a current of 3 A was applied and 300 CC was passed. FIG. 10 shows the relationship between the dissolved hydrogen molecule concentration in the generated cathode electrolyzed water and the cathode electrode area. This result shows that the dissolved water molecule concentration increases as the area of the cathode electrode increases. That is, as the current density decreases, the dissolved hydrogen molecule concentration increases.

  The electrolytic cell shown in FIG. 7 was incorporated in the test apparatus shown in FIG. 11, and the relationship between the pressure in the cathode chamber and the concentration of dissolved hydrogen molecules was measured. Raw material water was supplied to the electrolytic cell 26, and a flow meter 291 and a flow rate adjusting valve 29 were provided in the electrolytic cell outlet piping to adjust the pressure in the cathode, and the cathode chamber pressure was adjusted by the flow rate adjusting valve 29. The other conditions were an electrolytic current of 3 A and a water amount of 300 cc / min. The pressure (water head pressure) was measured at the outlet of the electrolytic cell. The measurement results are shown in FIG. It can be seen that the dissolved hydrogen molecule concentration exceeds 1.0 ppm when the pressure at the outlet of the electrolytic cell is 5 cm or higher. Thus, it can be seen that a method of increasing the pressure in the cathode chamber is effective for increasing the concentration of dissolved hydrogen molecules.

  In FIG. 13, the metal fiber assembly cathode electrode 72 is brought into contact with the plate-like cathode electrode 7 for supplying electricity, and the ion exchange resin 13 is interposed between the metal fiber assembly cathode electrode 72 and the fluorine-based cation exchange membrane diaphragm 8. The electrolytic cell structure filled with is shown. The dissolved hydrogen molecule concentration also depends on the type of the filled ion exchange resin. FIG. 14 shows the results of comparing the effect of anion exchange resin and cation exchange resin on the concentration of dissolved hydrogen molecules. As can be seen from this figure, in order to further improve the dissolved hydrogen concentration, it is effective to fill the anion exchange resin in the electrolytic cell structure shown in FIG.

On the other hand, when the cation exchange resin is filled, metal ions in the raw material water can be supplemented.
With this structure, it is possible to suppress the degree to which the pH of the cathode electrolyzed water shifts to alkalinity. A baffle plate 41 is provided so that water does not pass through the back side of the plate-like cathode electrode. The baffle plate 41 supplies raw water into the metal fiber assembly cathode electrode and the ion exchange resin.

  FIG. 15 shows a basic system flow for a drinking water dispenser incorporating the electrolytic cell of FIG. 7 or FIG. Raw water such as tap water was first treated using a thread-wound filter 21, an activated carbon filter 22, and a reverse osmosis membrane filter 23. Using these filters, the conductivity of the raw water was set to 10 μS / cm or less. The raw water was once stored in the water storage tank 24 and the temperature of the raw water was lowered using the cooler 28. This raw material water was supplied to the cathode chamber 4 and the anode chamber 10 of the electrolytic cell 26 by a pump 27. The pressure inside the cathode chamber is adjusted by using a flow rate adjusting valve 29 provided in the electrolyzed water outlet pipe subjected to cathode electrolysis so that the water head pressure is about 10 cm, and the dissolved hydrogen molecule concentration is 0.8 ppm or more, preferably 1.0 ppm or more. I tried to become.

  In the cathode chamber. As shown in the figure, the anode chamber is provided with a plate-like porous anode electrode, and is further brought into close contact with the diaphragm 8 made of a fluorine-based cation exchange membrane. On the other hand, the metal fiber assembly 72 is brought into close contact with the diaphragm 8 at the cathode side. In the cathode chamber 4, first, a baffle plate 41 is provided in order to allow supply water to flow into the cathode electrode of the metal fiber assembly placed in contact with the second diaphragm 81 made of an ion exchange membrane. In order to supply raw water to the water-permeable cathode electrode 72, it is effective to install a baffle plate 41. A plate-like cathode electrode 75 is combined to supply current to the metal fiber cathode electrode.

  FIG. 17 shows a basic system flow in which the electrolytic cell provided with the intermediate chamber shown in FIG. 16 is incorporated in a beverage dispenser. An electrolytic cell incorporating an intermediate chamber 17 is provided between the cathode chamber 4 and the anode chamber 10. For raw water such as tap water, first, high-purity water having an electric conductivity of 4 μS / cm or less, which has been treated using a spool filter 21, activated carbon filter 22, and reverse osmosis membrane filter 23, is temporarily stored in a water storage tank 24, and then cooled. 28 is used to lower the temperature of the raw water. This raw water is supplied to the cathode chamber 4 and the anode chamber 10 of the electrolytic cell 26 by a pump 27. The pressure inside the cathode chamber is adjusted using an adjustment valve 29 in the electrolyzed water outlet pipe subjected to cathode electrolysis so that the dissolved hydrogen molecule concentration is 0.8 ppm or more, preferably 1.0 ppm or more. Furthermore, when adding supplements such as vitamin C to the cathode electrolyzed water, it is suitable for adding raw materials to the intermediate chamber and supplying the cathode electrolyzed water from the intermediate chamber. The supplement was supplied to the intermediate chamber liquid tank 40.

  The cathode chamber pressure was adjusted to about 10 cm by adjusting the pressure inside the cathode chamber using the regulating valve 29.

  As shown in FIG. 19, a system for purifying raw water and performing electrolysis using a hollow fiber filter capable of filtering 0.1 μm fine particles instead of a reverse osmosis membrane filter is shown. Specifically, raw water treated by using a hollow fiber filter 231 after the bobbin filter 21 and the activated carbon filter 22 is temporarily stored in a water storage tank 24, and the cathode chamber of the electrolytic cell 26 is used by using a pump 27 when electrolytic cathode water is used. 4 is supplied with raw water. A flow rate adjusting valve 29 is provided at the outlet of the cathode electrolyzed water to adjust the pressure in the cathode chamber so that the dissolved hydrogen molecule concentration is 0.8 ppm or more. At this time, if a fluorine-based cation exchange membrane is used as the diaphragm, electrolysis can be performed at a low voltage without supplying raw material water to the anode chamber. The cathode chamber pressure was adjusted to about 10 cm by adjusting the pressure inside the cathode chamber using the regulating valve 29.

  In this system, since a reverse osmosis membrane filter is not used, there is a concern about contamination of the cathode electrode due to metal ions such as Ca and Mg dissolved in the raw material water. In this example, the electrolytic cell of FIG. 7 and the electrolytic cell of FIG. In the electrolytic cell of FIG. 7, a metal fiber assembly cathode electrode was incorporated, and in the electrolytic cell of FIG. 9, a plate-like porous cathode electrode was used. Conductivity: 150 μS / cm The raw material water flow rate was 0.5 l / min., And the electrolysis current was 3 A. When the cathode electrode is contaminated with metal impurities, the electrolysis voltage increases. The test results are shown in FIG. As is clear from FIG. 18, when the metal fiber assembly cathode electrode was used, the degree of increase in the electrolysis voltage was low as compared with the plate-like porous cathode electrode. This indicates that the metal assembly cathode electrode is also effective as a countermeasure against contamination by metal impurities.

  According to the present invention, hydrogen molecule-dissolved water having a dissolved hydrogen molecule concentration of 1.0 ppm or more can be easily obtained, which contributes to the maintenance of health.

Four. Cathode chamber
Five. Cathode chamber entrance
6． Cathode chamber outlet
7． Cathode electrode
72. Metal fiber assembly electrode
75. Second cathode electrode
76. Connecting line between cathode electrodes
8． diaphragm
9． Anode electrode (plate-like porous electrode)
Ten. Anod room
11． Anod room entrance
12． Anod room exit
twenty one. Spool filter
twenty two. Activated carbon filter
twenty three. Reverse osmosis membrane filter
twenty four. Water storage tank
twenty five. Flow sensor
26. Electrolytic cell
27. Water pump
28. Cooler
29. Adjustment valve
291. Pressure gauge
30. Dissolved hydrogen molecule
31. Hydrogen gas bubbles
32. Diffusion layer
40. Intermediate chamber liquid tank
401. Intermediate chamber liquid circulation pump
41. Baffle plate

Claims (9)

A method for producing hydrogen molecule-dissolved water in which hydrogen molecules are dissolved by electrolyzing raw water using an electrolytic cell having an anode chamber having an anode electrode and a cathode chamber having a cathode electrode, wherein the anode chamber and the cathode chamber are The anode electrode is a plate-like electrode provided with a plurality of through-holes, separated by a diaphragm made of a fluorine-based cation exchange membrane, the anode electrode is closely attached to the diaphragm, and the cathode electrode having an area larger than the anode electrode area, the pressure in the cathode compartment and water head pressure 5cm above includes the conductivity is electrolyzed by passing water the following process raw water 250 [mu] S / cm,
A method for producing hydrogen molecule-dissolved water having a pH of 9.5 or less and a dissolved hydrogen molecule concentration of 1.0 ppm or more, wherein an anion exchange resin is filled between the cathode electrode and the diaphragm .   The method for producing hydrogen molecule-dissolved water according to claim 1, wherein the cathode electrode is a plate-like cathode electrode provided with a plurality of through holes.   The method for producing hydrogen molecule-dissolved water according to claim 1, wherein the cathode electrode is a cathode electrode made of a metal fiber aggregate.   2. The hydrogen molecule-dissolved water according to claim 1, wherein an intermediate chamber partitioned by a diaphragm made of a fluorine-based cation exchange membrane is provided between the anode chamber and the cathode chamber, and an acidic substance is added to the intermediate chamber. Production method. An electrolytic cell having an anode chamber having an anode electrode for electrolyzing raw material water and a cathode chamber having a cathode electrode, wherein the anode chamber and the cathode chamber are partitioned by a diaphragm made of a fluorine-based cation exchange membrane, and a plurality of penetrations A plate-like anode electrode with holes is adhered to the diaphragm, the area of the cathode electrode is made larger than the area of the anode electrode , an anion exchange resin is filled between the cathode electrode and the diaphragm, and the pressure in the cathode chamber is reduced. An apparatus for producing hydrogen molecule-dissolved water having a dissolved hydrogen concentration of 1.0 ppm or more, characterized by providing means for increasing the concentration. The apparatus for producing hydrogen molecule-dissolved water according to claim 5 , wherein the cathode electrode is a plate-like cathode electrode provided with a plurality of through holes. The apparatus for producing hydrogen molecule-dissolved water according to claim 5 , wherein the cathode electrode is a cathode electrode made of a metallic nonwoven fabric. The apparatus for producing hydrogen molecule-dissolved water according to claim 5 , wherein an intermediate chamber partitioned by a diaphragm made of a fluorine-based cation exchange membrane is provided between the anode chamber and the cathode chamber. 2. The method for producing hydrogen molecule-dissolved hydrogen water according to claim 1, wherein the raw water is not supplied to the anode chamber, and the raw water is supplied only to the cathode chamber in which the metal fiber assembly cathode electrode is incorporated.