JP2005185912A - Water treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for making drinking water or service water by desalting seawater by a small-sized seawater desalting apparatus. <P>SOLUTION: This water treatment apparatus has an introducing part for introducing water before treatment being water to be treated, a flowing part for allowing the water from the introducing part to flow, a cathodic treatment chamber having a cathode arranged therein and brought into contact with the flowing part through a cationic membrane, an anodic treatment chamber having an anode arranged therein and brought into contact with the flowing part through an anionic membrane and a lead-out part for leading out treated water from the flowing part. In the cathodic treatment chamber, positive ions contained in the water flowing through the flowing part are oxidized by penetrating the cathode. In the anodic treatment chamber, negative ions contained in the water flowing through the flowing part are reduced by penetrating the anode. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to seawater desalination and purification technologies such as hot springs and tap water.

Many large plants that use reverse osmosis membranes to make seawater into drinking water can be found, but on the ship, drinking water necessary for voyage is loaded at anchorage, so large tanks for drinking water are used in harbor facilities and ships. Need to be installed. In addition, seawater desalination techniques in the prior art have the disadvantage that they are expensive because they use a reverse osmosis membrane or a distillation method, and are large in equipment.
Patent Publication 61-178418 JP2000-64080

  For this reason, this invention proposes the technique which desalinates seawater and manufactures drinking water or irrigation water with a small-sized seawater desalination apparatus.

  The present invention includes an introduction part for introducing pre-treatment water that is water to be treated, a circulation part for circulating water from the introduction part, a cathode treatment chamber in which a cathode is disposed and is in contact with the circulation part by a cation membrane. A water treatment apparatus comprising: an anodizing chamber in which an anode is disposed and is in contact with the circulation part by an anion film; and a derivation part for deriving treated water treated from the circulation part, wherein the cathode treatment chamber Then, the cation contained in the water flowing through the flow part can pass through the cation membrane and be oxidized at the cathode, and in the anodizing chamber, the anion contained in the water flowing through the flow part is The anodized membrane can be reduced at the anode, and the cathode treatment chamber and the anodization chamber are filled with a first solution and a second solution, respectively. A first solution of the anodizing chamber and the anodizing chamber; The two solutions have a first solution exchange part whose ion concentration is controlled within a prescribed range by being exchanged at a prescribed ratio, and a second solution exchange part, and the anode is made of carbon, platinum or vanadium. It is made of any one or two or more materials and further has an anion membrane exchange part for exchanging the anion membrane.

  According to the water treatment device according to any one of claims 1 to 9 of the present invention, the following excellent effects can be obtained. That is, since the seawater can be desalinated with light equipment, the loading capacity of the ship can be increased. Moreover, it can also be used as a water purifier for hot springs, tap water, etc. for wider use. Since the structure is extremely simple, the equipment can be easily maintained and the equipment can be made cheaper than the conventional reverse osmosis membrane method and distillation method. Moreover, about the chlorine etc. which are generated gas at the time of desalinating seawater, this can be collect | recovered and reused.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this invention should not be limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof.

  The first embodiment mainly relates to claim 1.

  The second embodiment mainly relates to claim 2.

  The third embodiment mainly relates to claim 3.

  The fourth embodiment mainly relates to claim 4.

  The fifth embodiment mainly relates to claim 5.

  Embodiment 6 mainly relates to claims 6 and 8 and 9.

  The seventh embodiment mainly relates to claim 7.

  Embodiment 1

<Concept>
FIG. 1 shows an overall conceptual diagram of the water treatment apparatus.

  This embodiment shows a basic form of the present invention. The feature point is that impurities are removed to apply seawater, naturally occurring water, hot spring or other water to drinking water or industrial water by applying the principle of water electrolysis. The water treatment apparatus according to the present embodiment includes an introduction unit 0102 for introducing pre-treatment water 0101 that is water to be treated in water, a circulation unit 0103 for circulating water from the introduction unit, and a cathode 0104, and the circulation. A cathode treatment chamber 0106 in contact with the cation membrane 0105 and an anode 0107, and an anodization chamber 0109 in contact with the circulation portion and the anion membrane 0108, and a derivation for deriving treated water 0110 treated from the circulation portion Part 0111. In the cathode and the anode, cations and anions contained in the water before the treatment are electrically attracted to the cathode and the anode and accumulated in the treatment chamber. In this embodiment, the cathode and the anode are characterized in that an insulator is applied to or attached to their surfaces, and ions are only attracted to the processing chamber. Ions that have undergone such an electrical treatment become treated water from which cations and anions as impurities have been removed in the lead-out part. In addition, since impurities accumulate in the cathode processing chamber and the anodizing chamber and the concentration becomes high, for example, it is desirable to periodically exchange the solution inside the processing chamber through the discharge pipe 0113 and the introduction pipe 0112. The capacity of the power supply unit 0114 for performing these processes is, for example, a voltage of 30 volts and a current of 2 amps / liter.

<Configuration of Embodiment 1>
FIG. 2 is a functional block diagram of the first embodiment.

  The first embodiment is a water treatment apparatus that includes an introduction unit 0201, a circulation unit 0203, a cathode treatment chamber 0202, an anodization chamber 0204, and a lead-out unit 0205.

    <Description of Configuration of Embodiment 1>

  The “introducing unit” introduces pre-treatment water that is water to be treated. “Pre-treatment water” is water to be treated and contains various cations, anions, and other precipitates. The “introducing portion” may have a filter for removing impurities such as precipitates. The “pre-treatment water” may be water from which precipitates or the like have been removed in advance, or water that is not treated at all. In the present specification, the term “water” may refer to a liquid containing not only pure H 2 O but also other substances such as insoluble substances that are not soluble in water and water-soluble substances that are soluble in water.

  The “distribution unit” distributes the water from the introduction unit. Water is circulated from the introduction part, and water is derived from the derivation part. In the “distribution section”, the pre-treatment water is treated. The pre-treatment water circulated from the introduction part is treated in this circulation part. That is, cations and anions are removed.

  The “cathode treatment chamber” has a cathode and is in contact with the circulation part with a cation membrane. The “cationic membrane” is one of ion exchange membranes, and is a membrane that selectively permeates only cations, that is, cations. The cathode treatment chamber is partially or entirely covered with a cation membrane, and only cations that permeate the cation membrane among those attracted to the cathode accumulate in the treatment chamber. Therefore, the concentration of the cation or the substance resulting from the cation increases with the passage of time of the water treatment.

  “Contacting the circulation part with the cation membrane” means that the water in the circulation part is in contact with the cation membrane. Various forms of contact can be considered. The structure of the cation membrane and the anion membrane is shown in FIG. FIG. 3 is a cross-sectional view showing only the distribution part, the cathode processing chamber, and the anodizing chamber, and the relationship between these three. A part or the whole of the periphery of the cathode processing chamber 0301 is covered with a cation film, and a part or the whole of the periphery of the anodizing chamber 0303 is covered with an anion film. It is in contact with the distribution unit in the form of being immersed in the distribution unit 0302. FIG. 4 is a cross-sectional view showing the relationship between these three components extracted from the flow section, the cathode processing chamber, and the anodizing chamber in the same manner as in FIG. 3, but shows a different type from FIG. 3. That is, in FIG. 4, the cathode 0401 and the anode 0403 are comb-shaped so as to engage with each other. In this case, the cathode processing chamber 0402 and the anodizing chamber 0404 are shaped so as to enclose the cathode and the anode, respectively, and the space between them serves as a circulation part. In FIG. 4, the water may flow toward the front side in the vertical direction of the page or vice versa, or may flow from left to right in FIG. 4 or vice versa. FIG. 5 is a sectional view showing only the flow section, the cathode processing chamber, and the anodizing chamber extracted in the same manner as in FIG. 4 and showing the relationship between the three, but shows a different type from FIG. Here, the outermost edge portion 0504 is an insulator. For example, this material is vinyl chloride or an engineering plastic having electrical insulation. The voltage is applied as shown in FIG. Here, a line 0505 indicated by a solid line represents an electrode. The circulation unit 0502 is in contact with an anodizing chamber 0501 composed of a cation film, an anode 0505 and an insulator 0504, and a cathodic treatment chamber 0503 composed of an anion film, an electrode 0505 and an insulator 0504. Water may flow either in front of the vertical direction of the paper or vice versa.

  The “anodic treatment chamber” has an anode and is in contact with the flow part by an anion film. The “anion membrane” is one of ion exchange membranes, and is a membrane that selectively transmits only anions, that is, anions. The anodizing chamber is partially or entirely covered with an anion film, and only anions that permeate the anion film among those attracted to the anode accumulate in the processing chamber. Therefore, the concentration of anions or substances resulting from these anions increases with the passage of time of water treatment. Since the details of the various forms of the cathode processing chamber have been described in the above-mentioned “anodic processing chamber”, detailed description thereof is omitted here.

  The “derivation unit” derives treated water that has been treated from the distribution unit. Treated water is water from which cations and anions have been removed. The treated water may be further subjected to removal of precipitates and the like through a filter.

<Processing flow of Embodiment 1>
FIG. 6 is a diagram illustrating a processing flow of the water treatment method according to the first embodiment.

  An introduction step 0601 for introducing pre-treatment water that is water to be treated, a circulation step 0602 for circulating water from the introduction section, a cathode treatment step 0603, and an anodization step 0604 for treating the circulated water. And a derivation step 0605 for deriving treated water that has been treated from the distribution unit.

    <Effect of Embodiment 1>

  Embodiment 1 has an effect of attracting cations and anions to be removed from water before treatment to the cathode treatment chamber and the anodization chamber.

  << Embodiment 2 >>

    <Concept>

  The second embodiment is an invention based on the first embodiment, and in particular, an invention showing specific processing contents in the cathode processing chamber and the anodizing chamber. The feature is that Embodiment 1 only attracts ions to the processing chamber, whereas in this embodiment, electrons are exchanged with ions at the cathode and anode, and an oxidation reaction occurs in the cathode processing chamber. The reduction reaction occurs in the anodizing chamber. In this way, the cations and anions in the circulation part are removed.

<Configuration of Embodiment 2>
FIG. 7 is a diagram for explaining the configuration of the second embodiment, and is a sectional view in which a cathode processing unit, an anodizing unit, and a circulation unit are extracted and described for the purpose of explanation.

  Embodiment 2 is a water treatment apparatus having an introduction part, a circulation part 0701, a cathode treatment chamber, an anodization chamber, and a lead-out part on the basis of Embodiment 1, and the feature point is the cathode In the treatment chamber 0702, cations contained in the water flowing through the flow portion can pass through the cation membrane and be oxidized at the cathode 0703. In the anodization chamber 0704, the water flowing through the flow portion can be oxidized. The anion contained therein can pass through the anion membrane and be reduced at the anode 0705.

    <Description of Configuration of Embodiment 2>

  In the “cathode treatment chamber” of Embodiment 2, the cation contained in the water flowing through the flow section can pass through the cation membrane and be oxidized at the cathode. The water H2O flowing through the circulation part contains a cation X + and an anion Y-. In the cathode processing chamber, positive ions X + are attracted to the cathode, and receive electrons e− from the cathode to be deposited. That is, it is oxidized. Oxidized cations precipitate. In this way, the cathode treatment chamber removes cations.

  On the other hand, in the “anodic treatment chamber” of the second embodiment, anions contained in water flowing through the flow passage can pass through the anion membrane and be reduced at the anode. In other words, the anion Y is attracted to the anode of the anodizing chamber and is reduced by passing electrons to the anode. The reduced anion becomes a gas or elutes into the anodizing chamber. In this way, the anodization chamber removes anions.

<Processing flow of Embodiment 2>
FIG. 8 is a diagram illustrating a flow of water treatment according to the second embodiment.

  The introduction step 0801, the distribution step 0802, and the derivation step 0805 have the same basic processing flow as in the first embodiment, and thus detailed description thereof is omitted.

  In the cathode treatment step of Embodiment 2, 0803 is a treatment in which the cation contained in the water circulated in the circulation step permeates the cation membrane and oxidizes at the cathode, and the anodization step 0804 is the flow of the circulation. The anion contained in the water flowing through the part in the flow step passes through the anion membrane and is reduced at the anode.

    <Effect of Embodiment 2>

  Embodiment 1 has the effect of attracting cations and anions to be removed from the water before treatment to the cathode treatment chamber and the anodization chamber, oxidizing the cations, and reducing the anions.

  << Embodiment 3 >>

    <Concept>

  The third embodiment is an invention in which the solutions in the anodizing chamber and the cathodic processing chamber in the first or second embodiment are exchanged at a predetermined ratio. If the anions and cations removed and accumulated in Embodiment 1 or Embodiment 2 are not removed from the treatment chamber, the concentration will rise and ions will flow back into the flow section of the water treatment device, and the treatment of the water treatment device There is a risk that ability will decline. In the present embodiment, in order to prevent this, the ion concentration is controlled within a predetermined range by exchanging the solutions in the anodizing chamber and the cathode processing chamber at a predetermined ratio, thereby stabilizing the processing capability function of the water treatment apparatus. It is an invention to make it.

<Configuration of Embodiment 3>
FIG. 9 is a diagram for explaining the configuration of the third embodiment.

  The third embodiment is a water treatment apparatus having an introduction unit 0908, a circulation unit 0910, a cathode treatment chamber 0901, an anodization chamber 0903, and a lead-out unit 0909 based on the first or second embodiment. The cathodic treatment chamber and the anodizing chamber are filled with the first solution and the second solution, respectively. The first solution of the cathodic treatment chamber and the anodizing chamber And the 2nd solution is a point which has the 1st solution exchange part 0905 and the 2nd solution exchange part 0906 which ion concentration controls to a predetermined range by exchanging by a predetermined ratio.

    <Description of Configuration of Embodiment 3>

  Since the basic functions of the introduction unit, the distribution unit, the cathode processing chamber, the anodizing chamber, and the derivation unit are the same as those in the first or second embodiment, detailed description thereof is omitted.

The “cathode treatment chamber” and the “anodization chamber” in this embodiment are filled with a “first solution” and a “second solution”, respectively. The ion concentrations of the “first solution” and the “second solution” may be such concentrations that ions do not flow backward from the cathode processing chamber and the anodizing chamber to the flow section through the cation membrane and the anion membrane. For example, the first solution and the second solution may be pre-treatment water. Further, the first solution and the second solution may be the same solution. Further, the first solution and the second solution may be exchanged as appropriate.
FIG. 10 shows an example of the third embodiment.

  Pre-treatment water is introduced into the anodization chamber and the cathode treatment chamber from the same pipe as that of the introduction unit 1010. The introduced water circulates in each of the anodizing chamber and the cathode treating chamber, and is discharged from the discharge port 1008. The discharged water includes cations and anions removed from the water that has passed through the circulation unit 1011, and precipitates and gases.

  The “first solution” and the “second solution” include a first solution exchange unit that controls the ion concentration within a predetermined range by being exchanged at a predetermined rate, and a second solution exchange unit. The first solution exchange part has an inlet and an outlet for the first solution. The second solution exchange part also has both an inlet and an outlet for the first solution. FIG. 10 shows an example of the solution exchange unit. The first solution exchange unit has an inlet 1005 and an outlet 1006. The second solution exchange unit has an inlet 1007 and an outlet 1008. Flow rates of pre-treatment water through the introduction unit 1012 of the circulation unit 1011, pre-treatment water through the introduction port 1005 of the first solution exchange unit, and pre-treatment water through the introduction port 1007 of the second solution exchange unit The adjustment may be made according to the diameters of the pipes of the introduction part and the introduction port, and there may be a valve for adjustment in each part. In particular, since the concentration of highly corrosive chlorine ions or reduced and generated chlorine is high in the second solution in the anodizing chamber, it is desirable to increase the replacement ratio of the second solution.

<Processing flow of Embodiment 3>
FIG. 11 is a diagram illustrating a flow of water treatment according to the third embodiment.

  Since the introduction process 1101, the distribution process 1102, the cathodic treatment step 1103, the anodizing process 1104, and the derivation step 1107 have the same basic process flow as that of the first or second embodiment, the detailed description thereof will be omitted. Description is omitted.

  The first solution exchange step is a step in which the ion concentration is controlled within a predetermined range by exchanging the first solution at a predetermined rate. The second solution exchange step is a step in which the ion concentration is controlled within a predetermined range by exchanging the second solution at a predetermined rate.

    <Effect of Embodiment 3>

  According to this embodiment, the ion concentration in the cathode processing chamber and the anodizing chamber can be controlled within a predetermined range, and the effect of maintaining the efficiency of water treatment can be achieved.

  << Embodiment 4 >>

    <Concept>

  The fourth embodiment is an invention in which a metal material having excellent corrosion resistance is used for the anode in order to prevent corrosion of the anode from which the electrode is eluted and corrosive anions and gases are easily generated.

    <Configuration of Embodiment 4>

  Embodiment 4 is a water treatment apparatus having an introduction part, a circulation part, a cathode treatment chamber, an anodization chamber, and a lead-out part on the basis of any one of Embodiments 1 to 3, The point is a water treatment apparatus in which the cathode treatment chamber and the anodization chamber are each composed of a first solution, a first solution exchange unit, and a second solution exchange unit, The anode is a point made of one or more materials of carbon, platinum, and vanadium.

    <Description of Configuration of Embodiment 4>

  The “anode” of Embodiment 4 is made of one or more materials of carbon, platinum, and vanadium. The anode may be any insoluble material. This is because at the anode, the metal from which electrons have been removed is ionized and eluted into the second solution. On the other hand, since the cathode is less likely to be eluted, a material such as stainless steel may be used. However, an insoluble material may also be used for the cathode.

    <Effect of Embodiment 4>

  According to the fourth embodiment, there is an effect that elution of the anode can be prevented.

  << Embodiment 5 >>

    <Concept>

  In the fifth embodiment, when seawater is treated with water, corrosive gas such as chlorine is generated in the anodizing chamber, and the anion membrane is greatly deteriorated. It is an invention.

<Configuration of Embodiment 5>
FIG. 12 is a diagram for explaining the configuration of the fifth embodiment.

  The fifth embodiment is based on any one of the first to fourth embodiments. The introduction unit 1202, the flow unit 1203, the cathode processing chamber 1209, the anodizing chamber 1206, the lead-out unit 1211, and the first solution exchange unit. 1212 and the second solution exchange unit 1213, the feature point is that it has an anion membrane exchange unit 1214.

    <Description of Configuration of Embodiment 5>

  Since the introduction unit, the distribution unit, the cathode processing chamber, the anodizing chamber, the derivation unit, the first solution exchange unit, and the second solution exchange unit have the same functions, detailed description thereof is omitted. To do.

  The “anion membrane exchange part” of Embodiment 5 is for exchanging the anion membrane. The anodizing chamber and the circulation part are in contact via an anion membrane. With the exchange part for exchanging the anion membrane, for example, if the procedure for exchanging the anion membrane is in the form as shown in FIG. 12, the anode and the anion membrane are integrated in the anodizing chamber. This is taken out from the lid 1214, the anion membrane is replaced, and it is disposed again at the original position. Accordingly, in the example of FIG. 12, the anion membrane exchange unit is the lid 1214. The shape of the lid may be any shape, and any shape can be used as long as the anodizing chamber can be taken out in the example of FIG.

    <Effect of Embodiment 5>

  According to the fifth embodiment, there is an effect that an anion membrane that is severely deteriorated can be easily replaced.

  Embodiment 6

    <Concept>

  Embodiment 6 is a water treatment facility in which pre-treatment water is seawater, hot spring water, or tap water. This water treatment device desalinates seawater. This water treatment device also removes toxic arsenic from hot spring water. Furthermore, this water treatment apparatus removes chlorine used for disinfection from tap water.

    <Configuration of Embodiment 6>

  The sixth embodiment is based on any one of the first to fifth embodiments, the introduction unit, the flow unit 1301, the cathode processing chamber 1302, the anodizing chamber 1304, the lead-out unit, the first solution exchange unit, A water treatment apparatus having a second solution exchange unit, wherein the pre-treatment water is seawater, hot spring water, or tap water.

    <Description of Configuration of Embodiment 6>

  The introduction part, the distribution part, the cathode treatment chamber, the anodization chamber, the lead-out part, the first solution exchange part, and the second solution exchange part are basically the same as any one of the first to fifth embodiments. Since the function is common, detailed description is omitted.

(When pretreatment water is seawater)
FIG. 13 is a diagram showing the movement of sodium ions and chlorine ions in the flow section, the anodizing chamber, and the cathodic chamber when the pre-treatment water is seawater.

  One of the pre-treatment water of Embodiment 6 is seawater. Na + is attracted to the cathode 1303, passes through the cation membrane 1302, and enters the cathode processing chamber. On the other hand, Cl − is attracted to the anode 1305, passes through the anion film 1302, and enters the anodizing chamber. In this way, the water treatment apparatus of the present invention takes Na + and Cl− from the circulation section 1301 into the cathode treatment chamber and the anodization chamber, and removes Na + and Cl− from the seawater flowing through the circulation section. By this treatment, seawater is desalinated.

(When pre-treatment water is hot spring water)
FIG. 14 is a diagram showing the movement of arsenic ions in the circulation section, the anodizing chamber, and the cathodic processing chamber when the pre-treatment water is hot spring water.

  One of the pre-treatment water of Embodiment 6 is hot spring water. As3 + is attracted to the cathode 1403, passes through the cation membrane 1402, and enters the cathode processing chamber. On the other hand, anions are attracted to the anode 1405 and pass through the anion film 1402 to enter the anodizing chamber. The water treatment apparatus of the present invention thus takes arsenic from the circulation part 1401 into the cathode treatment chamber and removes arsenic from the hot spring water that circulates in the circulation part.

(When pre-treatment water is tap water)
FIG. 15 is a diagram showing the movement of chlorine ions in the circulation section, the anodizing chamber, and the cathodic processing chamber when the pre-treatment water is hot spring water.

  One of the pre-treatment water in the sixth embodiment is tap water. Cations are attracted to the cathode 1503 and pass through the cation membrane 1502 to enter the cathode processing chamber. On the other hand, chlorine ions Cl− are attracted to the anode 1505 and permeate the anion film 1402 to enter the anodizing chamber. In this way, the water treatment apparatus of the present invention takes Cl- from the circulation section 1401 into the cathode treatment chamber and removes arsenic from the hot spring water flowing through the circulation section.

    <Effect of Embodiment 6>

  According to the sixth embodiment, sodium ions and chlorine ions are removed from seawater for desalination, toxic arsenic is removed from hot spring water, and chlorine is removed from tap water.

  << Embodiment 7 >>

    <Concept>

  Embodiment 7 is a case where the first solution in the cathode treatment chamber and the second solution in the anodization chamber are both seawater. In particular, when seawater is desalinated at sea or in a port where seawater is abundant, the water treatment apparatus can be stably operated by using seawater for the first solution and the second solution. It is a feature of the present invention that it is not necessary to prepare a special solution.

<Configuration of Embodiment 7>
FIG. 16 is a diagram illustrating the configuration of the seventh embodiment.

  The seventh embodiment is based on any one of the first to sixth embodiments, and the introduction unit 1612, the flow unit 1611, the cathode processing chamber 1601, the anodizing chamber 1603, the outlet unit 1613, and the first solution exchange unit. And a second solution exchanging part, wherein the first solution and the second solution both contain seawater.

    <Description of Configuration of Embodiment 7>

  The introduction unit, the flow unit, the cathode treatment chamber, the anodization chamber, the lead-out unit, the first solution exchange unit, and the second solution exchange unit are basically the same as any one of the first to sixth embodiments. Since the common function is common, detailed description is omitted.

  Both the “first solution” and the “second solution” of Embodiment 7 contain seawater. When the pre-treatment water introduced from the introduction part is seawater, it is desirable that the first solution and the second solution include seawater. This is realized by FIG. That is, it can be realized by introducing seawater to be supplied to the water inlet, the first solution exchange unit, and the second solution exchange unit from the same pipe 1610.

  Similarly, when it is desired to remove arsenic from hot spring water, the same hot spring water may be used for the first solution and the second solution. In addition, when it is desired to remove chlorine from tap water, the same tap water may be used for the first solution and the second solution.

<Effect of Embodiment 7>
According to the seventh embodiment, the first solution and the second solution can be produced with a simple apparatus using the same seawater as the desalination treatment.

1 is an overall conceptual diagram of a water treatment apparatus according to Embodiment 1. FIG. The figure which shows the functional block of Embodiment 1. The figure which shows an example of the distribution part of Embodiment 1, the cathode processing chamber which contact | connects with a cation film | membrane, and the cathode processing chamber which contact | connects a distribution | circulation part and a cation film | membrane. The figure which shows an example of the distribution part of Embodiment 1, the cathode processing chamber which contact | connects with a cation film | membrane, and the cathode processing chamber which contact | connects a distribution | circulation part and a cation film | membrane. The figure which shows an example of the distribution part of Embodiment 1, the cathode processing chamber which contact | connects with a cation film | membrane, and the cathode processing chamber which contact | connects a distribution | circulation part and a cation film | membrane. The figure which shows the flow of the water treatment of Embodiment 1. The figure which shows the oxidation in the electrode of Embodiment 2, and reduction | restoration. The figure which shows the flow of the water treatment of Embodiment 2. The first solution and the second solution in the cathode processing chamber, the anodizing chamber, and the second solution in Embodiment 3 are exchanged at a predetermined ratio, thereby controlling the ion concentration within a predetermined range; The figure which shows a 2nd solution exchange part. The first solution and the second solution in the cathode processing chamber, the anodizing chamber, and the second solution in Embodiment 3 are exchanged at a predetermined ratio, thereby controlling the ion concentration within a predetermined range; The figure which shows the specific example of a 2nd solution exchange part. The figure which shows the flow of the water treatment of Embodiment 3. Schematic for demonstrating the anion membrane exchange part of Embodiment 5. FIG. The figure which shows the flow of the process of the seawater of Embodiment 6. The figure which shows the flow of the hot spring water processing of Embodiment 6. The figure which shows the flow of a process of the tap water of Embodiment 6. The figure which shows the 1st solution and Embodiment 2 of Embodiment 7. Diagram showing the structure of anion membrane and cation membrane

Explanation of symbols

0101 Pre-treatment water 0102 Introduction unit 0103 Flow unit 0104 Anode 0105 Anion membrane 0106 Anodizing chamber 0107 Cathode 0108 Cationic membrane 0109 Cathode treatment chamber 0110 Treated water 0111 Deriving unit 0112 Deriving port 0113 Discharging port 0905 First solution exchange unit 0906 Second Solution exchange part 1214 Anion membrane exchange part

Claims (9)

An introduction section for introducing pre-treatment water that is water to be treated;
A distribution unit for distributing water from the introduction unit;
A cathode treatment chamber in which a cathode is disposed and is in contact with the circulation part by a cation membrane;
An anodizing chamber disposed with an anode and in contact with the circulation part with an anion membrane; and a derivation part for deriving treated water from the circulation part;
Having water treatment equipment. In the cathode treatment chamber, a cation contained in water flowing through the circulation part can pass through the cation membrane and be oxidized at the cathode.
The water treatment apparatus according to claim 1, wherein in the anodizing chamber, anions contained in water flowing through the flow part can pass through the anion membrane and be reduced at the anode. The anodizing chamber and the anodizing chamber are filled with a first solution and a second solution, respectively.
The first solution and the second solution in the anodizing chamber, the anodizing chamber, and the second solution are exchanged at a predetermined rate, whereby the ion concentration is controlled within a predetermined range, The water treatment apparatus according to claim 1, further comprising a solution exchange unit.   The water treatment apparatus according to any one of claims 1 to 3, wherein the anode is made of one or more materials of carbon, platinum, and vanadium.   The water treatment apparatus according to any one of claims 1 to 4, further comprising an anion membrane exchange unit for exchanging the anion membrane.   The water treatment apparatus according to any one of claims 1 to 5, wherein the pretreatment water is seawater.   The water treatment apparatus according to any one of claims 1 to 6, wherein the first solution and the second solution both contain seawater.   The water treatment apparatus according to any one of claims 1 to 5, wherein the pre-treatment water is hot spring water.   The water treatment apparatus according to any one of claims 1 to 5, wherein the pre-treatment water is tap water.

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