JP2000233185A - Electrochemical water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment apparatus using a metal electrode unit, high in treatment efficiency and extended in electrode life. SOLUTION: An electrode structure 3 wherein a plurality of metal electrode units 1 are laminated through spacers 2 is integrated by using electric insulating clamping means, for example, bolts 5 and nuts 6 to be mounted in an electrolytic cell. Since the mutual positions of the metal electrode units are fixed by the clamping means, strain is hard to generate and desired effect can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for electrochemically treating water to be treated, and more particularly to sterilization and water quality maintenance of various kinds of water to be treated such as bath water and cooling water using a metal electrode. The present invention relates to an electrochemical water treatment apparatus for performing such operations.

[0002]

2. Description of the Related Art For example, various microorganisms such as bacteria are present in pure water, tap water, industrial water, well water, bath water, pool water, washing water, domestic wastewater, industrial wastewater, and the like. Inhabits or dissolves solutes. And, in these aqueous solutions, when the solute provides an appropriate amount of nutrients, or when the temperature of the aqueous solution is a temperature suitable for the propagation of microorganisms, the microorganisms propagate and cause deterioration of the performance of the aqueous solution, or each of the aqueous solutions Often accumulates and accumulates on the inner wall of a pipe or the like through which the gas flows, impairing the function of the equipment having the pipe. Although the required sterilization level is different for these various types of water, it is necessary to improve the water quality by reducing the number of microorganisms in the water at low cost in any of the waters.

[0003] As a method for treating such various kinds of water to be treated, many methods such as chemical addition, ozone treatment, activated carbon treatment, ultraviolet irradiation treatment, high-temperature boiling sterilization method, and chlorine addition method are known. Is selected and used according to.
However, all of these methods have disadvantages such as adversely affecting the water to be treated and insufficient treatment efficiency, and have not been satisfactory methods. As a water treatment method for overcoming such disadvantages of the prior art, a bipolar fixed-bed type electrolytic cell for water treatment has been disclosed (for example, JP-A-2-306242).

However, since the bipolar electrode fixed-bed type water treatment electrolyzer uses a porous electrode as a fixed bed, it is difficult to treat water to be treated containing solids, organic substances, and ionic occlusive substances. The pressure loss due to the flow of water in the electrolytic cell is large, a large capacity water supply pump is required, and the energy cost is high. Also, even when the content of the occluding substance in the water to be treated is small,
There is also a problem that sterilization performance is deteriorated during long-term use. Further, a carbon electrode is used as the porous electrode, and the carbon electrode has a drawback that it is easily worn out. When used for a long time, the electrode is gradually worn out, the distance between the electrodes is increased, and the voltage is increased. Will eventually have to be replaced. This electrode replacement generally requires disassembly of the entire electrolytic cell, which is a very complicated operation and often greatly reduces workability. In addition to this fixed-bed type water treatment electrolytic cell, a box-shaped or cylindrical electrochemical water treatment apparatus using a metal electrode has been conventionally used. Several types of electrodes have been proposed as electrodes used in this water treatment apparatus, but the most efficient electrodes are a plurality of porous electrode units such as titanium laths via a donut-shaped or frame-shaped spacer. An electrode structure formed by stacking, the electrode structure is accommodated in the cylindrical or other electrolytic cell, and water to be treated is supplied into the electrolytic cell and brought into contact with the electrode unit to oxidize or reduce. Water reforming such as sterilization of water is performed by the action.

[0005]

According to this water treatment method, a relatively large amount of water to be treated can be circulated, and if the treatment efficiency is insufficient, the water is supplied again to the electrolytic cell to be treated and treated. This has the advantage that sterilization and the like can be reliably performed. However, since the plurality of electrode units and the spacers are merely laminated and are brought into contact with each other by applying a vertical pressure, the outer diameter of the unit and the spacer and the inner diameter of the electrolytic cell are substantially the same. Although it is unlikely that the unit or spacer is distorted and deformed, the distance between the electrode units is increased or decreased, and power supply to each unit is not uniformly performed, and sterilization efficiency is reduced, Inconvenience such as shortening of electrode life due to current concentration occurs. These problems become significant as the size of the device increases.

In order to solve this drawback, it has been attempted to divide the electrode structure into a plurality of parts. In this case, an anode and a cathode are provided for each of the divided electrode structures so as to conduct electricity. ing. In order to realize this aspect, a lead wire is inserted from the side between adjacent electrode units of the above-mentioned electrode structure which is not actually divided, and current is supplied to each electrode structure. . However, in this embodiment, the influence of the inserted lead wire cannot be ignored, and this lead wire causes distortion of the spacer and the electrode unit, and as described above, the problems of non-uniformity of power supply and shortening of the electrode life cannot be solved. . An object of the present invention is to provide an electrochemical water treatment apparatus that solves such problems.

[0007]

To solve the above-mentioned problems, the apparatus of the present invention comprises an electrolytic cell main body, a single electrode structure mounted in the electrolytic cell main body, and power supply to both upper and lower surfaces of the electrode structure. A feeder and a treated water supply port and a treated water outlet into the electrolytic cell main body, wherein the electrode structure is
An electrochemical water treatment apparatus characterized in that a plurality of metal electrode units surface-treated with a catalyst are laminated via an electrically insulating spacer and fastened with an electrically insulating fastening material. The electrode structure constituted by the metal electrode unit of this device may be divided into a plurality of parts. Further, instead of using the above-mentioned electrically insulating fastening material, a conductive fastener whose surface is coated with an electrically insulating material is used. A dressing can also be used.

Hereinafter, the present invention will be described in detail. In order to perform the electrochemical treatment of the water to be treated using the apparatus according to the present invention, a metal electrode unit is preferably used as an electrode, preferably a porous metal electrode unit for improving drainage and improving contact efficiency. use. The term “porous” in this case means that the resistance to the flow of the water to be treated is almost zero and the opening has a certain degree, and has a shape such as a net shape, an expanded mesh shape, a punched metal shape, or a lattice shape. For example, when using an expanded mesh, it is preferable to adjust the opening size so that the minor axis is about 1.0 to 4.0 mm and the major axis is about 2.0 to 5.0 mm. The porous electrode has a large surface area and a high oxidation efficiency as compared with the flat plate non-hole electrode, and turbulence occurs when the water to be treated passes through the porous,
It can be inferred that this increases the contact efficiency of the water to be treated with the metal electrode unit by stirring the water to be treated. The porous electrode unit, a catalyst on a corrosion-resistant metal substrate such as titanium,
For example, it is desirable to improve the electrode performance by coating platinum, iridium, ruthenium, palladium, osmium, rhodium or their oxides alone or as a mixture.

The electrode unit has an aperture ratio defined as a percentage of a value obtained by dividing the total surface area of each opening by the total electrode area obtained by adding the total surface area of the electrode and the total surface area of the opening. %. If the opening ratio is less than 10%, the pressure loss is large and clogging is likely to occur. If the opening ratio is more than 80%, the electrode strength is hindered and deformation or damage may occur. This is because water contact may be insufficient, and it is desirable to set an appropriate aperture ratio in consideration of both clogging and contact efficiency. However, the present invention does not exclude the use of a non-perforated plate-shaped electrode unit.

In the present invention, a plurality of metal electrode units are stacked via a spacer, and each metal electrode unit and each spacer are fastened by an electrically insulating fastening material, usually a bolt and a nut passing therethrough. The electrode structure is formed by connecting the metal electrode units to each other. By changing the number of metal electrode units, the thickness of this electrode structure consisting of a plurality of metal electrode units and spacers can be relatively freely adjusted according to the amount of water to be treated and the condition of the space in the electrolytic cell. Can be increased or decreased. The increase or decrease can be easily performed by using an electrically insulating fastening material that is optimal to use bolts and nuts. For example, it is necessary to prepare a large number of resin frames having different inner thicknesses as in the case of a resin frame. Disappears. In addition to changing the thickness of the metal electrode body by changing the number of metal electrode units, it may be desirable to change the thickness of the metal electrode unit itself or the thickness of the spacer. The purpose can be easily achieved by attaching and detaching.

The spacer used is for ensuring electrical insulation between adjacent metal electrode units. The shape of the spacer is not limited as long as the electrical insulation is ensured, but the contact efficiency between the water to be treated and the metal electrode unit is not limited. In order to improve the area, the area is preferably as small as possible. For example, the area is preferably a frame shape or a donut shape. The thickness of the spacer is desirably about 1 to 10 mm.
If it is less than mm, a short circuit may occur between adjacent electrodes due to a calcium compound or the like which may be deposited on the electrode, and if it exceeds 10 mm, it becomes difficult for a current necessary for sterilization or the like to flow. When the metal electrode unit is a perforated plate such as a titanium lath, the spacer also serves to reinforce the strength of the metal electrode unit. This spacer has a function to electrically insulate adjacent metal electrode units and to improve outgassing of oxygen gas and hydrogen gas which may be generated by electrolysis. The gas generated on the surface of the metal electrode unit inhibits the water to be treated from contacting the surface of the metal electrode unit, and lowers the efficiency of energizing each metal electrode unit. However, due to the presence of the spacer, the generated gas easily moves from the space between the adjacent metal electrode units to the periphery of the metal electrode body, thereby increasing the processing efficiency. Note that the present invention is not limited to a process involving gas generation.

Further, the generated gas causes convection in the water to be treated, and the convection allows the entire water to be treated to come into contact with the surface of the metal electrode unit uniformly. Therefore, even when treating a large amount of water to be treated, the water to be treated can be treated without installing a separate stirring device. An electrode structure formed by stacking a plurality of the above-described metal electrode units,
The water to be treated is accommodated in an electrolytic bath, and the water to be treated is supplied into the electrolytic bath and brought into contact with the electrode unit to perform a reforming treatment such as sterilization of the water to be treated. It is desirable to supply current to this electrode structure at a DC voltage of 42 V or less for safety reasons, and the current density is low.
Optimum processing efficiency can be obtained by setting it to about 0.1 to 1.0 A / dm ² . This is because if it is less than 0.1 A / dm ² , sufficient sterilization may not be performed, and if it exceeds 1.0 A / dm ² , the electrode life may be shortened. The energization may be carried out while maintaining the polarity. However, in the case of water other than pure water, for example, the polarity can be reversed every 2 to 180 minutes to dissolve the precipitated calcium compound or magnesium compound. If the continuous energization time is less than 2 minutes, the sterilization efficiency is poor and the electrode life tends to be short, and if it exceeds 180 minutes, the precipitation amount of the compound increases.

In order to energize the apparatus of the present invention, a power supply is actually required. The power supply is a member for supplying power to the metal electrode unit from outside the electrolytic cell. The material is not particularly limited as long as it is a metal having a property and resistance to the water to be treated, but titanium is preferably used from the viewpoint of resistance. Normal electric welding or the like is used to connect the power supply and the metal electrode unit. As described above, when the electrode structure is divided into a plurality of parts, the metal electrode units are stacked via the spacers so that the two metal electrode units are located at the upper and lower ends to form the electrode structure unit. A plurality of this electrode structure unit is manufactured, and each unit is installed in the electrolytic cell at an interval in the vertical direction so that each unit is not short-circuited. Or the power is supplied to each unit, or the power is connected to each unit using the same number of power supplies as the number of units, and the power is supplied to each unit, thereby treating the water to be treated. This embodiment has the advantage that the number of metal electrode units in the electrode structure unit is reduced, so that the voltage for energization is reduced, and the number of electrode units is reduced, so that distortion is less likely to occur and the electrode life is extended.

On the other hand, there are disadvantages in that the wiring and structure become complicated, the production cost increases, and the current value also increases. Therefore, taking into account the type and amount of water to be treated,
What is necessary is just to determine whether to divide the electrode structure. The mechanism for killing microorganisms according to the present invention can be assumed as follows. First, microorganisms strike the anode surface and die. Secondly, trace amounts of chlorine contained in the water to be treated are oxidized on the electrode surface to generate hypochlorous acid, and active oxygen is generated by water electrolysis. Microorganisms in the water to be treated are sterilized by these hypochlorous acid and active oxygen, and trace impurities are decomposed. In the electrochemical treatment according to the present invention, unlike the conventional electrolytic cell which is an apparatus for water treatment, a plurality of metal electrode units are fastened with an electrically insulating fastening material, and distortion is generated between the units or between the unit and the spacer. Since it hardly occurs, no excessive force is applied to the electrode unit, which can contribute to the improvement of the electrode life.

The apparatus of the present invention withstands long-term operation and requires almost no cleaning. However, when cleaning is performed, hydrogen peroxide, ozone water, hypochlorous acid, acidic water having a pH of 3 or less, and alkaline water having a pH of 9 or more are used. Either one may be flowed alone or alternately. In addition, the apparatus of the present invention produces a sufficient effect even if the treatment of the water to be treated is carried out by the electrochemical treatment alone, but it is more reliable if the treatment by the apparatus is used in combination with ultraviolet sterilization, ozone sterilization, chemical sterilization and the like. The water to be treated can be treated in a short time. Use of the apparatus of the present invention can achieve sterilization of microorganisms in the water to be treated and other improvements in water quality. The microorganisms include bacteria (bacteria), molds (fungi), yeasts,
It includes deformed bacteria, single-celled algae, protozoa, viruses and the like, and the improvement of water quality includes decomposition of impurities such as ammonia.

The water to be treated which is the object of the present invention is not particularly limited, and can be widely used in many fields of daily life and industrial activities. And seawater, artificially created aqueous solutions, dilution water, etc. More specific examples are industrial water, tap water, purified water, well water, rainwater, recovered water, humidified water, drainage, gutter water, storage water, and seawater. (Bacterial control and sterilization of shells, algae, masts, etc.), pond water, pool water, boiler water, cooling tower water, scrubber water, elevated water tanks, drinking water, bath water, gas absorption tower water, cooling water, hot water , Hydroponic cultivation water, fountain, photographic developer, water for fish farming (appreciation fish, farmed fish), water for ornamental animals and farmed birds, water emulsion, papermaking water, hot spring water, sugar solution,
Fruit juice dilution water, dye ink dilution water, water-soluble paint dilution water, water-soluble cosmetics dilution water, sake dilution water, milk dilution water, juice dilution water, tea dilution water, soy milk dilution water, denture storage antibacterial water, contact lens storage Examples include bacteriostatic water, toothbrush storage bacteriostatic water, aqueous solutions containing various chemical substances, water for thermal or nuclear power plants, etc. Further, it is necessary or desirable to reduce the number of microorganisms in the water to zero. Hard disk cleaning water, semiconductor cleaning water, vending machine water, etc. are also included. Furthermore, it can be used for pretreatment of water for sterilization of quays, pipes and various intakes.

According to the present invention, not only can microorganisms and harmful impurities contained in the above-mentioned various kinds of water to be treated be efficiently disinfected, but also COD and BOD can be decomposed and removed, and electrochemical treatment can be carried out from the water to be treated containing a small amount of pesticides. It is also possible to decompose and remove pesticides and lighten the color of the water to be treated.
Furthermore, when a chlorine compound or a bromine compound such as sodium chloride, potassium chloride, hydrogen chloride, hypochlorous acid or sodium bromide is added and the above-mentioned water treatment is performed, sterilizing water containing hypochlorous acid or hypobromite is obtained. Can be manufactured. This sterilizing water can be used as floor washing water, equipment washing water, container washing water, vegetable washing water, meat washing water, fruit washing water and the like.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an electrochemical water treatment apparatus according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view illustrating one embodiment of the electrochemical water treatment apparatus of the present invention, and FIG. 2 is a plan view showing the power supply and reinforcing member of FIG. Reference numeral 1 denotes a metal electrode unit in which a mixture of, for example, platinum and iridium is carried on the surface of a circular expanded mesh made of titanium (a short diameter of about 3 mm and a long diameter of about 4 mm are optimal). The electrode structure 3 is formed by vertically stacking ten donut-shaped spacers 2 between the peripheral portions thereof. A through hole 4 is formed at a corresponding position of each of the metal electrode units 1 and the spacer 2, and a bolt 5 molded of an electrically insulating material, for example, a resin is inserted into the hole from above. The lower end of the bolt 5 located below the metal electrode unit 1 is fastened with an electrically insulating nut 6 to integrally form the electrode structure 3 in which the members are firmly joined.

On the upper surface of the uppermost metal electrode unit 1 and the lower surface of the lowermost metal electrode unit 1, a central power supply center 7a, six power supply rods 7b extending radially from the power supply center 7a, and each power supply rod Feeding ring 7c connecting the tip of 7b
Are pressed toward the electrode structure 3 to supply a negative current to the uppermost metal electrode unit 1 of the electrode structure 3 and a positive current to the lowermost metal electrode unit 1. The current is supplied and the strength of the electrode structure 3 is increased. 8 is an inward projection formed on the inner wall of the electrolytic cell to fix the electrode structure 3 at a predetermined position in the electrolytic cell, 9 is an electrolytic cell bottom plate having an elbow-shaped water inlet 10 at the center of the lower surface, Reference numeral 11 denotes an electrolytic cell top plate having a treated water outlet 12 at the center of the upper surface.

When power is supplied between the upper and lower power supply and reinforcing plates 7, the lower surface of each of the 11 metal electrode units 1 is positively charged and the upper surface thereof is negatively charged. The water to be treated mainly comes into contact with the lower surface (positively charged) of the metal electrode unit 1 to sterilize (oxidize) the microorganisms in the water to be treated. Microbial disinfection and oxidative decomposition of BOD, COD, pesticides, ammonia, etc. are performed by hypochlorite ions generated by the oxidation of oxygen and chloride ions in the nascent stage, and these oxidation products are generated near the upper surface (negatively charged). Microbial disinfection is efficiently performed by nascent oxygen generated by the reduction of substances. The present invention also includes a mode in which the bolt and nut are made conductive, and the metal electrode unit and the bolt and nut are insulated by an electrically insulating washer or an insulating material layer covering the inner edge of the through hole of the metal electrode unit.

FIG. 3 is a longitudinal sectional view illustrating another embodiment of the electrochemical water treatment apparatus of the present invention. This embodiment relates to an improvement of the embodiment of FIG. The same reference numerals are given to the same members, and the description is omitted. The electrode structure 13 of the present embodiment has five metal electrode units 1 and four spacers 2 stacked alternately and fastened with bolts 14 and nuts 6 shorter than the bolts in FIG. Three electrode structures 13 are vertically arranged via two thin cylindrical rings 15. Through holes 16 are formed in both rings 15, through which the power supply lead wire 17 is provided on the lower surface of the uppermost electrode structure 13 in the electrolytic cell, on the upper and lower surfaces of the central electrode structure 13, and The lowermost electrode structure 13 is connected to the power supply center 7 a of the power supply and reinforcing plate 7 on the upper surface. Power is supplied to the upper surface of the uppermost electrode structure 13 and the lower surface of the lowermost electrode structure 13, and power is supplied to the reinforcing plate 7 by a lead wire that does not pass through the through hole 16 of the ring 15. Reference numeral 18 denotes an electrolytic tank bottom plate having a cylindrical water inlet 19 at the center of the lower surface, and reference numeral 20 denotes an electrolytic tank top plate having a treated water outlet 21 at the center of the upper surface. In the present embodiment, the applied voltage can be reduced because power can be supplied to each electrode structure 13, and the number of metal electrode units 1 constituting each electrode structure 13 is smaller than in the embodiment of FIG. It is unlikely to occur, and the electrolysis efficiency is increased, and the electrode life is prolonged.

[0022]

EXAMPLES Next, examples relating to the treatment of water to be treated using the electrochemical water treatment apparatus according to the present invention will be described, but the examples do not limit the present invention.

[0023]

EXAMPLE A 1.6 mm thick donut between three 1 mm thick, 79 mm diameter circular titanium laths (titanium perforated plate, short diameter 2.5 mm, long diameter 3.5 mm expanded mesh) coated with platinum and iridium oxide on the surface. Insert two resin spacers, insert resin bolts into through holes drilled in three places corresponding to the titanium lath and the spacers, fasten the other ends with resin nuts, and further make six titanium screws. The electrode structure having the power supply rod and one power supply ring and the power supply and reinforcing plates shown in FIG. 2 installed on both upper and lower surfaces was housed in a resin electrolytic tank having an inner diameter of 80 mm.

As treatment water to be tested, a bath tub having a depth of about 70 cm and filled with tap water and bathing three people a day in this tub was used. The number of microorganisms in the water to be treated is 10 ⁶ / ml
Met. The water to be treated was supplied and circulated to the electrolytic cell at a rate of 3 ml / min, and was subjected to a current supply at 12 V DC and 0.3 A DC. When 24 hours had passed, the number of microorganisms fell below the detection limit. After this operation was continued for 6 months, the number of microorganisms was kept below the detection limit, the electrolytic cell was disassembled and the inside was observed, but each metal electrode unit was completely separated and maintained in shape by the spacer, and the titanium lath was completely covered. It had a platinum group catalyst color.

[0025]

[Comparative Example] An electrolytic cell was assembled and treated with the same conditions as in the example except that the metal electrode units were laminated and integrated with only the power supply and reinforcing plates without using resin bolts and nuts. went. After 24 hours, the number of microorganisms had fallen below the detection limit, but after continuing this operation for 6 months, the number of microorganisms rose to 10 ³ cells / ml. The metal electrode unit was deformed, the distance between the metal electrode units was not uniform, the platinum group catalyst was consumed, and a part of the metal group had a titanium lath color.

[0026]

The electrochemical water treatment apparatus according to the present invention comprises an electrolytic cell main body, a single electrode structure mounted in the electrolytic cell main body, a power supply for supplying power to both upper and lower surfaces of the electrode structure, and Comprising a treated water supply port and a treated water outlet into the electrolytic cell main body, wherein the electrode structure is formed by stacking a plurality of metal electrode units surface-treated with a catalyst via an electrically insulating spacer, An electrochemical water treatment apparatus (claim 1), wherein the electrochemical water treatment apparatus is formed by fastening with an electrically insulating fastening material. As described above, in the present invention, since the metal electrode units stacked via the spacers are integrated by being electrically fastened with an electrically insulating fastening material, usually a bolt and a nut, the electrochemical processing is continued even if the electrochemical processing is continued. The distance between adjacent metal electrode units is hardly uneven due to deformation of the metal electrode unit, and stable processing efficiency and prolonged life of the metal electrode unit can be achieved.

When the upper and lower surfaces of the electrode structure are fed and press-fitted with a reinforcing plate together with the integration of the metal electrode unit by the electrically insulating fastening material, the strength of the electrode structure is further improved. In addition, the size of the electrolytic cell can be increased, and the above-described achievement of stable processing efficiency and prolonged life of the metal electrode unit becomes more remarkable. Further, the electrode structure may be divided into a plurality of parts (claim 3), whereby the number of metal electrode units included in each electrode structure is reduced, so that distortion appearing in each metal electrode unit is minimized, and The effects of the increase in efficiency and the extension of the service life become clearer. In this case, a short cylindrical body is fitted between the divided electrode structures, and power is supplied to the power supply body by a power supply lead wire passing through a hole formed in the cylindrical body. In addition, a short circuit between the electrode structures and a decrease in strength are eliminated. The joining between the metal electrode units may be performed by using an electrically insulating fastening material, or by using an electrically conductive fastening material whose surface is coated with an electrically insulating material. The fastening can be performed even by using a conductive fastening material such as ordinary bolts and nuts. Also in this embodiment, there is no short circuit between the metal electrode units, and a stable processing efficiency and a long life of the metal electrode units can be achieved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating one embodiment of an electrochemical water treatment apparatus of the present invention.

FIG. 2 is a plan view showing the power supply and reinforcement body of FIG. 1;

FIG. 3 is a longitudinal sectional view illustrating another embodiment of the electrochemical water treatment apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal electrode unit 2 Spacer 3 Electrode structure 4 Through-hole 5 Bolt 6 Nut 7 Power supply and reinforcement plate 7a Power supply center 7b Power supply rod 7c Power supply ring 8 Inward projection 9 Electrolytic tank bottom plate 10 Treated water inlet 11 Electrolytic tank top plate DESCRIPTION OF SYMBOLS 12 Treated water outlet 13 Electrode structure 14 Bolt 15 Ring 16 Through hole 17 Power supply and reinforcing plate 18 Electrolyzer bottom plate 19 Treated water inlet 20 Electrolyzer top plate 21 Treated water outlet

Claims (5)

[Claims] 1. An electrolytic cell main body, a single electrode structure mounted in the electrolytic cell main body, a power supply body for supplying power to upper and lower surfaces of the electrode structure, a water supply port for processing water into the electrolytic cell main body, The electrode structure is formed by stacking a plurality of metal electrode units surface-treated with a catalyst via an electrically insulating spacer and fastening with an electrically insulating fastening material. An electrochemical water treatment apparatus characterized in that: 2. The electrochemical water treatment apparatus according to claim 1, wherein at least one of the power supply members to the upper and lower surfaces of the electrode structure is a power supply member also serving as a reinforcing plate in which a plurality of power supply rods radially extend from a power supply center. . 3. An electrolytic cell main body, a plurality of electrode structures mounted in the electrolytic cell main body, a power supply for supplying power to both upper and lower surfaces of the electrode structure, a water supply port for processing water into the electrolytic cell main body, and The electrode structure is formed by stacking a plurality of metal electrode units surface-treated with a catalyst via an electrically insulating spacer and fastening with an electrically insulating fastening material. An electrochemical water treatment apparatus characterized in that: 4. A short cylindrical body is fitted between power supply bodies of adjacent electrode structures, and power is supplied to the power supply body by a power supply lead wire passing through a hole formed in the cylindrical body. The electrochemical water treatment apparatus according to claim 3, wherein 5. An electrolytic cell main body, an electrode structure mounted in the electrolytic cell main body, a power supply body for supplying power to both upper and lower surfaces of the electrode structure, a water supply port into the electrolytic cell main body, and a water to be treated. An electrode structure, wherein the electrode structure is formed by laminating a plurality of metal electrode units surface-treated with a catalyst via an electrically insulating spacer and covering the surface with an electrically insulating material by a conductive fastening material. An electrochemical water treatment apparatus characterized by being fastened.