TW200526526A - Apparatus for forming ion-exchanged water and method for regenerating ion exchange resin therein - Google Patents

Abstract

An apparatus for forming ion-exchanged water which comprises a pair of electrode, an anode (1) and a cathode (2), and, between the anode (1) and the cathode (2), in the following order from the anode (1) side, an anode chamber (8), an anion exchange resin chamber (10), a bi-polar film (3), a cation exchange resin chamber (11) and a cathode chamber (9). The b-ipolar film is used to electrolyze water of saline water when a voltage is applied between the anode and the cathode. The generated OH- ions or H+ ions are used to regenerate the anion exchange resin in the anion exchange resin chamber and the cation exchange resin in the cation exchange resin chamber. The above apparatus allows the reduction of the amount of chemicals, and has no need of using salts or water required for regeneration of an ion exchange resin, which results in the reduction of the cost required for regeneration of an ion exchange resin.

Description

200526526 (1) IX. Description of the invention [Technical field to which the invention belongs] The present invention relates to a water treatment device including a regeneration means of an ion exchange resin. In more detail, the present invention relates to water or brine provided with a bipolar membrane. A water treatment device that regenerates an ion exchange resin by generating H + ions or 0ΗΓ ions generated by electrical decomposition.

[Prior Art] For water treatment equipment, many people have proposed to use ion exchange resins. For example, a cation exchange resin is used in a water treatment apparatus, and the hardness component Ca2 + ions or Mg2 + ions contained in raw water are replaced (ion exchanged) with Na + ions or H + ions by the cation exchange resin to make soft water. However, in the case where the exchange groups of all cation exchange resins, that is, Na + ions or H + ions are replaced by Ca 2+ ions or Mg 2+ ions, further ion exchange cannot be performed, so it is necessary to perform this ion exchange. Regeneration of ion exchange resin that can recover. That is, in such a water treatment device using an ion exchange resin, it is necessary to alternately perform regeneration for restoring ion exchange in the raw water and ion exchange energy of the ion exchange resin. In order to regenerate the ion exchange energy of this ion exchange resin, an agent such as an acid or an alkali, or a salt is used. However, each of these agents or salts requires a large amount to be regenerated each time, resulting in cost or time-consuming. problem. Therefore, as a method for regenerating an ion exchange resin without using a chemical or a salt, a method for regenerating a cation exchange resin by acidic water generated by electrolysis is proposed (Patent Document 1). -4-200526526 (2) However, since the concentration of H + ions in the acidic water system generated by ordinary electrolysis is low, there is a problem that a large amount of water is required even if no salt is used. In addition, there has been proposed a softening device having a mechanism for simultaneously regenerating a cation exchange resin and an anion exchange resin by H + ions and 0ΗΓ ions generated by the electrical decomposition of water on the electrode surface (Patent Document 2) °

However, the electrical decomposition of water on the surface of these electrodes is not able to efficiently generate H + ions and OH 'ions because hydrogen and oxygen are generated as shown in the following formula. 2H2〇— 2H2 + 〇2 In addition, the method of collecting anions and cations on the electrode surface to produce acidic or alkaline electrolyzed water will generate chlorine gas at the anode, which will reduce the efficiency of acid generation. At the cathode, Due to the formation of calcium scale, the problem of increased electrode resistance occurs. [Patent Document 1] Japanese Patent Laid-Open No. 7-6 8 2 5 6 [Patent Document 2] Japanese Patent Laid-Open No. 2 0 0 3 4 0 8 6 [Contents of the Invention] [Problems to be Solved by the Invention] This The present invention is to solve the problems caused during the regeneration of the ion exchange resin in the conventional water treatment device described above, and an object of the invention is to provide a water treatment device which does not require the use of chemicals or salts during regeneration of the ion exchange resin, and can reduce The amount of recycled water can greatly reduce the cost of ion exchange -5- 200526526 (3) Resin replacement. [Means for solving problems]

This: The water treatment device of the invention has a pair of electrodes composed of an anode and a cathode. The electrodes have an anode chamber, an anion exchange resin chamber, an anion exchange membrane and a cation exchange membrane in this order from the anode side. The electrode membrane, the anode exchange resin chamber, and the cathode chamber. The anion exchange resin chamber is filled with an anion exchange resin in a space separated by the membrane and the bipolar membrane. The cation exchange resin chamber is formed by a membrane and the bipolar membrane. The space separated by the membrane is filled with cation exchange resin. The anode chamber is separated by the anode and a separator that separates the anion exchange resin chamber. The cathode chamber is the cathode and the separator that separates the cation exchange resin chamber. In addition, the above-mentioned bipolar membrane is arranged with the anion exchange membrane side as the anode side and the cation exchange membrane side as the cathode side, and further includes the following mechanism: by applying a voltage between the anode and the cathode, The bipolar membrane electrically decomposes water or brine, and regenerates the anion with the generated η _ ions or η + ions. Exchange resin is an anion exchange resin chamber or said cation exchange resin is a cation exchange resin chamber, will be reproduced by the cathode compartment or the anode compartment to discharge from the ion-exchange by the electric pressure, the above problems can be solved by this. The water treatment device of the present invention includes a pair of electrodes composed of an anode and a cathode. Between the electrodes, an anode chamber, an anion exchange resin chamber, an anion exchange membrane and a cation exchange membrane are sequentially arranged from the anode side. Bipolar membrane, anode exchange resin chamber, and cathode chamber, the above anion exchange-6- 200526526 (4) The resin chamber is based on the above cation

The cation-filled anion-exchange tree cathode and the upper bipolar membrane are arranged between the upper chambers, and the side of the cation-exchange membrane is separated from the upper chamber. The generated cation exchange voltage in the resin exchange chamber is discharged to the person. In addition, the pair of electrodes of the present invention, the anion exchange tree bipolar membrane, and the anode lipid chamber are provided with a resin exchange, and the space separated by the two separators is filled with an anion exchange resin exchange resin room provided by a two diaphragm. The anode space is separated from the anode by a separator that separates the lipid chamber, and the cathode compartment is separated by the diaphragm that is the cation exchange resin chamber. The anion exchange resin chamber is separated from the above. The cathode-side diaphragm of the anion-exchange resin chamber on the cation exchange resin and the anode-side diaphragm of the isolation resin chamber are separated by a distance from the anion anode side, and the cation exchange membrane side is used as the cathode side. The bipolar membrane partitioned by the resin chamber is connected to the region partitioned by the above cation exchange resin chamber, and also has the following mechanism: by applying a voltage between the anodes, water or saline is electrically formed in the bipolar membrane. 〇ΗΓ ion or H + ion regeneration of the above anion exchange anion exchange resin or the above cation exchange resin indoor resin will be subject to regeneration Ion-exchanged ions pass through the above-mentioned anode chamber or cathode chamber to thereby solve the aforementioned problem. The water treatment device has an anode and a cathode formed between the electrodes, and an anode chamber and a lipid chamber are sequentially bonded from the anode side. Anion exchange membrane and cation exchange membrane exchange resin chamber and cathode chamber. The space separated by the cation exchange tree membrane and the bipolar membrane is filled with a cationic cross anode chamber. The anode is separated from the bipolar membrane by 200526526. (5)

The cathode chamber is separated by the cathode and a separator that separates the cation exchange resin chamber. The bipolar membrane is arranged with the anion exchange membrane side as the anode side and the cation exchange membrane side as the cathode side. The following mechanism: by applying a voltage between the anode and the cathode, water or brine is electrically decomposed in the bipolar membrane, and the generated .H + ion is used to regenerate the cation exchange resin, which is subjected to ion exchange by the regeneration. The cation is discharged from the cation exchange resin chamber to the cathode chamber by a voltage force, thereby solving the aforementioned problems. The water treatment device of the present invention includes a pair of electrodes composed of an anode and a cathode. Between the electrodes, an anode chamber, an anion exchange resin chamber, an anion exchange membrane and a cation exchange membrane are sequentially arranged from the anode side. Bipolar membrane, anode exchange resin chamber, and cathode chamber, the above cation exchange 1 = the lipid chamber is filled with cation exchange resin in a space separated by two diaphragms, and the anode chamber is based on the anode and the bipolar membrane For separation, the cathode chamber is separated by the cathode and a cathode-side diaphragm that separates the cation exchange resin chamber, and the bipolar membrane is separated by an anode-side diaphragm that separates the cation exchange resin chamber, and The anion exchange membrane side is arranged as the anode side and the cation exchange membrane side is arranged as the cathode side, and has the following mechanism: by applying a voltage between the anode and the cathode, water or brine is electrically charged in the bipolar membrane. Decompose and regenerate the cation exchange resin with the generated H + ions. The cation exchange resin chamber is discharged to the above-mentioned cathode chamber, thereby solving the aforementioned problems. 200526526 (6) [Inventive effect] If the water treatment device according to the present invention is used, it is not necessary to use chemicals or salts when regenerating the ion exchange resin, and the amount of regeneration water can be reduced, and the ion exchange resin can be greatly reduced. Cost of regeneration.

That is, in the water treatment device of the present invention, H + ions and ΟΗΓ ions are generated by the electrical decomposition of water in a bipolar membrane (hereinafter, "electrical decomposition" is referred to as "electrolysis"). As the ion exchange resin is regenerated, it is not necessary to use a large amount of chemicals or salts when regenerating the ion exchange resin. In addition, in the electrolysis of water based on a bipolar membrane, as shown in the following formula, no gas generation is accompanied, H + ions and OIT ions can be generated, and no gas is generated as in the case of water electrolysis on the conventional electrode surface. As a result, H + ions and OtT ions are consumed, so ions used for regeneration can be efficiently generated. Η2〇- > Η + + 〇Η · By the way, water electrolysis on the surface of the electrode proposed in the past usually forms a reaction accompanied by gas generation as shown in the following formula: 〇2—2H2 + 〇2 As described above, the generated H + ions and OIT ions are consumed, and at the same time, the problem of oxygen that promotes combustion with explosive hydrogen gas is generated in large quantities. Furthermore, in the water treatment device of the present invention, cations such as Ca2 + ions or Mg2 + ions that are ion-exchanged by regeneration, or anions such as CI_ ions or ΝΟΓ ions are pulled near the cathode side or anode side by potentials 200526526 (7) electrode chamber while draining. Therefore, if the water treatment device of the present invention is used, it is not necessary to use a large agent or salt for the regeneration of the ion exchange resin, so the cost of regeneration can be reduced or the working hours can be simplified, and the amount of water used can be reduced. It is also easy to discharge ions that have been ion-exchanged, so the cost required for regeneration of ion-exchange resin can be greatly reduced.

[Embodiment] Hereinafter, a sinus application form of a water treatment apparatus according to the present invention will be described with reference to the drawings. < First Embodiment > Fig. 1 is a schematic diagram showing an example of a first embodiment (water treatment apparatus) of the present invention. The water treatment apparatus shown in Fig. 1 includes an anode for electrical decomposition. An anion exchange resin chamber 10 and a cation exchange resin chamber 11 separated by a pair of electrodes composed of 1 and a cathode 2 and separated by a bipolar membrane 3 that is bonded to an anion exchange membrane 3a and a cation exchange membrane 3b. 〇 塡 is filled with anion exchange resin 6, the anion exchange resin chamber 10 is arranged on the anode 1 side, and cation exchange resin chamber 1 1 is filled with the cation exchange resin 7, the cation exchange resin chamber 11 is arranged on the cathode 2 side . The bipolar membrane 3 based anion exchange membrane 3a is disposed on the anode 1 side, and the cation exchange membrane 3b is disposed on the cathode 2 side. An anode chamber 8 separated by a separator 4 is provided on the outside of the anion exchange resin chamber 10, and the other side of the anode chamber 8 is an anode] -10- 200526526 (8)

Is divided. That is, the 'anode chamber 8 is partitioned by the separator 4 and the anode 1. A cathode chamber 9 separated by a separator 5 is provided on the outside of the cation exchange resin chamber 11 and the other surface of the cathode chamber 9 is separated by a cathode 2. That is, the 'cathode chamber 9 is partitioned by the separator 5 and the cathode 2. Furthermore, although the upper end or lower end of the anode chamber 8 and the upper end or lower end of the cathode chamber 9 are preferably connected by a water-permeable water path, the upper end or lower end of the anion exchange resin chamber j 0 is exchanged with cations. The upper end or the lower end of the resin chamber 11 is also preferably connected by a water passage capable of passing water. Furthermore, in the present invention, for example, as described above, the outside of the anion exchange resin chamber 10 is partitioned by the separator 4 and the other surface of the anode chamber 8 is partitioned by the anode 1. The anode chamber 8 is partitioned by the separator 4 and the anode. 1 is separated, and a cathode chamber 9 separated by a membrane 5 is provided on the outside of the cation exchange resin chamber 11 and the other side of the cathode chamber 9 is separated by a cathode 2 or the cathode chamber 9 is received by a membrane 5 It can be expressed by being separated from the cathode 2, but the anode 1, the separator 4, the separator 5, the cathode 2, and the like may be configured to perform their respective functions. 'The anode chamber 8 is not required to be completely separated from the anode 1 by the separator 4. These can also be distinguished from other components by these, and the cathode chamber 9 is not required to be completely separated from the cathode 2 by the separator 5 and can also be separated from other components by these. The membranes 4 and 5 are membranes having fine pores, such as non-woven fabrics, which are capable of transmitting both ions and water, or ion exchange membranes through which only ions pass. When using both cation and anion to pass through like a non-woven fabric, the cation is concentrated in the anion exchange resin chamber and the anion is concentrated in the cation exchange resin chamber by the potential. Therefore, the ion exchange can be further improved. 11-200526526 (9 ) Change the regeneration efficiency of the resin. In addition, in FIG. 1, the membranes 4 and 5 are shown as being composed of a single material. However, the membranes 4 and 5 may only pass through ions (and water), and may be composed of a non-woven fabric or an ion exchange resin. It is a composite body with parts made of other materials (such as resin films).

In order to obtain pure water or soft water after treating water (for example, tap water) by the apparatus shown in FIG. 1, water is passed through the anion exchange resin chamber 10 and the cation exchange resin chamber 11 to perform ion exchange. For example, only in the case where the cation exchange resin chamber 11 processes water, soft water is obtained. On the other hand, in the case where the anion exchange resin chamber 10 and the cation exchange resin chamber 11 are treated with water, pure water or soft water is obtained. In the latter case, the order of passing water may be either anion exchange resin chamber 10 first, or cation exchange resin chamber 11 first. When the ion exchange resin is regenerated, it is desired that the anion exchange resin chamber 10 and the cation exchange resin chamber 11 are filled with water because a certain amount of water is consumed in the electrolysis of the water in the bipolar membrane 3. At this time, by filling the anion exchange resin chamber 1 0 and the cation exchange resin chamber 1 1 with brine, it is possible to increase the advantages of the concentration of the ΙΓ ions and ΗΓ ions to be generated from the initial stage of regeneration. Judging from the relationship, it does not have to be filled with salt water. The water treatment device has the above-mentioned structure, and water (tap water, etc.) can pass through the anode chamber 8, and water passing through the anode chamber 8 then passes through the cathode chamber 9, and by applying a voltage between the anode 1 and the cathode 2, Water or brine is electrically decomposed in the bipolar membrane 3, and -12-200526526 (10) ion exchange resin is regenerated with the generated H + ions or 0Η · ions. The ions' are discharged to the electrode compartment separated by the separator (the anode or cathode compartment may be collectively referred to as the "electrode compartment").

Δ Sheep is thinner and S ′ is supplied to the cation exchange resin chamber 1 1 by the osmium + ions generated by the electrolysis of water or brine of the bipolar membrane 3, and Ca 2 + in the cation exchange resin 7 filled with the chamber. Ions or Mg2 + ions undergo ion exchange (replacement) to regenerate the cation exchange resin 7. The cations such as Ca2 + ions or Mg2 + ions generated by the regeneration of the cation exchange resin 7 are pulled near the cathode 2 by the potential. On the other hand, it is discharged from the cation exchange resin chamber 11 to the cathode chamber 9. In addition, 0 ΟΓ ions generated by the electrolysis of water or brine of the bipolar membrane 3 are supplied to the anion exchange resin chamber i 0, and are processed with cr ions or NO / ions in the anion exchange resin 6 filled in the chamber. Ion exchange regenerates the anion exchange resin. Anions such as Cr ions or NO Γ ions generated by the regeneration of the cation exchange resin 7 are pulled near the anode 1 side by the potential, and discharged from the anion exchange resin chamber 10 to the anode. Room 8. In addition, when water (tap water, etc.) containing cations such as Ca 2+ ions or anions such as C 1 ions is supplied to the anode chamber 8, cations such as Ca 2 ions are recoiled from the anode 1 to anions due to the potential In the exchange resin chamber 10, the cation concentration of Ca2 + ions and the like in the anion exchange resin chamber 10 (particularly near the surface of the bipolar membrane 3) increases (that is, cations such as Ca2 + ions are concentrated). When the anode chamber 8 supplies water having a reduced cation concentration such as Ca2 + ions to the cathode chamber 9, the anions such as cr ions in the water are recoiled by the cathode 2 due to the potential. 13- 200526526 (11) 'Move to the cation exchange resin chamber 1 1 1, so the anion concentration of c Γ ions and the like in the cation exchange resin chamber 11 1 (especially near the surface of the bipolar membrane 3) increases (that is, anions such as cr ions are concentrated) .

In this way, when the cations are concentrated in the anion exchange resin chamber 10 (near the surface of the special bipolar membrane 3), and the anions are concentrated in the cation exchange resin chamber J i (near the surface of the special bipolar membrane 3), Due to the electrical balance, the amount of H + ions supplied to the cation exchange resin chamber 11 and the amount of OH 'ions supplied to the anion exchange resin chamber 10 are significantly increased due to the electrical decomposition of the bipolar membrane 3. . Therefore, in the apparatus of the present invention, the anion exchange resin and the cation exchange resin can be regenerated with extremely high efficiency (hereinafter, this effect is referred to as "ion concentration effect"). Incidentally, for example, in the above-mentioned Patent Document 2, there is also disclosed a method for regenerating an ion exchange resin using a bipolar membrane as a separator disposed between a cation exchange resin and an anion exchange resin (bath water circulation for ion exchange resin regeneration is possible) Soft hydration device). However, in the device of this patent document 2, the regeneration of an ion exchange resin by using H + ions and OH- ions generated by the anode and cathode is not used in the device for the bipolar membrane's electrical decomposition. Those who generate H + ions and OIT ions have a structure in which a cation exchange resin is arranged on the anode side and an anion exchange resin is arranged on the cathode side, so that the above-mentioned ion concentration effect of the device according to the present invention is not guaranteed. Even when anions such as cr ions are concentrated on the surface of the anode, the electrons are transferred to generate chlorine and the like, resulting in a decrease in the production efficiency of H + ions. When cations such as Ca2 + ions are concentrated on the surface of the cathode, they undergo electron transfer to generate calcium scale and the like. -14 · 200526526 (12) Electrolysis efficiency deteriorates. In contrast, as in the present invention, when electrolysis is performed with a bipolar film, no electron transfer occurs, so no such problem occurs, and no hydrogen or oxygen is generated on the surface of the bipolar film. In these points, the device of the present invention is greatly different from the conventional devices.

Furthermore, in the apparatus of FIG. 1, when water is treated to obtain pure water or soft water, a voltage may be applied between the anode 1 and the cathode 2 to supply water to the anode chamber 8 and the cathode chamber 9 ′. Water treatment (pure hydration, soft hydration) and regeneration of ion exchange resin are carried out in situ. < Second Embodiment > Fig. 2 is a schematic diagram showing an example of a second embodiment (water treatment apparatus) of the present invention. In FIG. 2, the same elements as those in FIG. 1 described above are designated by the same reference numerals and redundant descriptions are omitted (the same applies to FIGS. 3 and 4 to be described later). The water treatment device shown in FIG. 2 is provided with a pair of electrodes composed of an anode 1 and a cathode 2 for electrical decomposition; a bipolar membrane 3 that is bonded to an anion exchange membrane 3 a and a cation exchange membrane 3 b; A cation exchange resin chamber 1 1 filled with a cation exchange resin 7 in a space separated by a diaphragm; an anion exchange resin chamber 10 filled with an anion exchange resin 6 in a space separated by a diaphragm; and an anode chamber 8 and a cathode Room 9. The anode chamber 8 is located outside the anion exchange resin chamber 10 and is separated from the anion exchange resin chamber 10 by the anode 1 (diaphragm 4). The cathode chamber 9 is located on the side of the cation exchange resin chamber 11 and the cathode 2 is exchanged with cations. The resin chamber 11 (separator 5) is partitioned. In addition, the bipolar membrane 3 is formed between the anion exchange resin chamber 10 and the cation exchange resin chamber 1] to form an anion exchange resin chamber-15- 200526526 (13) 1 〇 and a diaphragm 12 of the cation exchange resin chamber 1 1 2 1 3 is arranged with the anion exchange membrane 3 a side as the anode 1 side and the cation exchange membrane 3 b side as the cathode 2 side with a distance. In addition, there are a water path 16 connecting a region 14 separated by the bipolar membrane 3 and the anion exchange resin chamber 10, and a region 15 separated by the bipolar membrane 3 and the anode ion exchange resin chamber 11. In the apparatus of Fig. 2, the anode chamber 8 and the cathode chamber 9 are connected by a water passage 17 capable of passing water.

As the separators 12, 13 can be applied the same separators 4 and 5 described in the first embodiment. When the apparatus of FIG. 2 processes water to obtain pure water or soft water, no voltage is applied between the anode 1 and the cathode 2, and water (tap water, etc.) is supplied to the anode chamber 8. The supplied water system undergoes anion exchange in the anion exchange resin chamber 10 through the diaphragm 4, enters the zone 14 through the diaphragm 12, and enters the zone 15 through the water channel 16. The water entering the region 15 passes through the membrane 13 and undergoes cation exchange in the cation exchange resin chamber 11 to form pure water or soft water. It enters the cathode chamber 9 through the membrane 5 and is taken out by the cathode chamber 9. When water treatment is performed, the water to be treated may be supplied from the cathode chamber 9, and the treated water (pure water or soft water) may be taken out from the anode chamber 8. In the case where a water channel 17 is provided, it is better to have a means (not shown) to block the passage of water, such as a stopcock. When performing water treatment, the blocking means is used to prevent water from directly moving in the anode chamber. 8 and cathode chamber 9. In the apparatus of FIG. 2, the smaller state can also reduce the speed when the water to be treated comes into contact with the ion-exchange resin, so that the efficiency of the treatment can be further improved -16-200526526 (14). When the ion exchange resin is regenerated in the apparatus of Fig. 2, as in the first embodiment described above, it is preferable that the anion exchange resin chamber 10 and the sun-changing tree changing chamber 11 are filled with water or saline.

In the apparatus of FIG. 2, when the ion exchange resin is regenerated, water (tap water, etc.) is supplied to the anode chamber 8, and water passing through the anode chamber 8 is supplied to the cathode chamber 9 through the water channel 17, while being supplied to the anode 1 A voltage is applied to the cathode 2. At this time, water or brine is electrically decomposed in the bipolar membrane 3 to generate H + ions and OIT ions. The generated H + ions are supplied to the cation exchange resin chamber n through the region 15 through a potential, and are ion-exchanged (replaced) with Ca 2+ ions or Mg 2+ ions in the cation exchange resin 7 to exchange the cation exchange resin 7. regeneration. The cations such as Ca2 + ions or Mg2 + ions generated by regeneration are pulled near the cathode 2 side by the potential, and are discharged from the cation exchange resin chamber 11 to the cathode chamber 9. In addition, the 0ΗΓ ion generated by the electrolysis in the bipolar membrane 3 is supplied to the anion exchange resin chamber 10 through the potential through the region 14 and is ion-exchanged (replaced) with Cr ions, NO0Γ ions, or the like in the anion exchange resin 6, The anion exchange resin 6 is regenerated. Anions such as Cr ions or NOI ions generated by regeneration are pulled near the anode 1 side by the potential, and are discharged from the anion exchange resin chamber 10 to the anode chamber 8. When regenerating the ion-exchange resin, it is better to prevent water from moving between the area 14 and area 15. For example, the water channel 16 is provided with a stopcock or other means (not shown) to block the passage of water. In addition, in the apparatus of FIG. 2, by supplying water including positive ion-17- 200526526 (15) ions and anions to the anode chamber 8 such as tap water, the water can flow into the cathode chamber 9 through the water channel 17. Since the same ion concentration effect as that of the device of the first embodiment is ensured, the ion exchange resin can be regenerated with extremely high efficiency. < Third embodiment >

Fig. 3 is a schematic diagram showing an example of a third embodiment (water treatment apparatus) of the present invention. The water treatment apparatus shown in FIG. 3 has a pair of electrodes composed of an anode 1 and a cathode 2 for performing electrical decomposition, and a bipolar membrane 3 and a separator that are bonded to the anion exchange membrane 3a and the cation exchange membrane 3b. Five compartments of cation exchange resin 11 are provided, and in addition to the above cation exchange resin compartment 11, there is an anode compartment 8 separated by a bipolar membrane 3 from the anode 1, and a compartment 5 separated by a separator 5 from the cathode 2. The cathode chamber 9. In the water treatment device shown in FIG. 3, the bipolar membrane 3 also has its anion exchange membrane 3a disposed on the anode 1 side, and the cation exchange membrane 3b disposed on the cathode 2 side. The separator 5 is also the same as described above. For non-woven fabrics. In order to obtain soft water by the apparatus of FIG. 3, water to be treated (tap water, etc.) is supplied to the cation exchange resin chamber 11 and ion exchange is performed. When the ion exchange resin is being regenerated, the cation exchange resin chamber I 1 is preferably filled with water or saline. Then, in the water treatment apparatus shown in FIG. 3, water (tap water, etc.) is supplied to the anode chamber 8, and water passing through the anode chamber 8 is then supplied to the cathode chamber 9, while being between the anode 1 and the cathode 2. By applying a voltage, when the bipolar membrane 3 electrically decomposes water or brine, 'the generated H + ions are supplied to the cation exchange resin chamber]] -18- 200526526 (16) Ca2 + ions or Mg2 + ions in the cation exchange resin 7 in the chamber are ion-exchanged to regenerate the cation exchange resin 7 and the cation system such as Ca2 + ions or Mg2 + ions generated by the regeneration of the cation exchange resin 7 It is pulled near the cathode 2 side by the potential, and is discharged from the cation exchange resin chamber 11 to the cathode chamber 9.

In the regeneration of the ion exchange resin, cations such as Ca2 + ions in the water supplied to the anode chamber 8 are recoiled by the anode 1 and moved to the bipolar membrane 3 side, so they are on the anode side surface of the bipolar membrane 3. Nearby cation concentrations increase. When the water passing through the anode chamber 8 is supplied to the cathode chamber 9, anions such as Cr ions in the water are recoiled by the cathode 2 and moved into the cation exchange resin chamber 11. Therefore, the cation exchange resin chamber 11 ( In particular, the anion concentration in the vicinity of the surface of the bipolar membrane 3 increases. Therefore, the same ion concentration effect as in the case of the first embodiment can significantly increase the amount of H + ions obtained by the electrolysis of water in the bipolar membrane 3, so that cations can be achieved with high efficiency. Regeneration of exchange resin 7. Furthermore, in the apparatus of FIG. 3, when water is treated to obtain soft water, by applying a voltage between the anode 1 and the cathode 2 to supply water to the anode chamber 8 and the cathode chamber 9, softening can be performed simultaneously. Regeneration with ion exchange resin. < Fourth Embodiment > Fig. 4 is a schematic view showing an example of a fourth embodiment (water treatment apparatus) of the present invention. In the water treatment device shown in Figure 4, there is used by -19- 200526526 (17)

A pair of electrodes composed of anode 1 and cathode 2 which are electrically decomposed; a bipolar membrane 3 which is bonded to an anion exchange membrane 3 a and a cation exchange membrane 3 b; a space separated by membranes 5 and 13 is filled with cations The cation exchange resin chamber 11 of the exchange resin 7 has an anode chamber 8 and a cathode chamber 9. The anode chamber 8 is partitioned by the anode 1 and the bipolar membrane 3, and the cathode chamber 9 is partitioned outside the cation exchange resin chamber 11 by the cathode 2 and the cation exchange resin chamber η (diaphragm 5). The bipolar membrane 3 is composed of a diaphragm 1 3 constituting a cation exchange resin chamber η at a distance (ie, across a region 15), an anion exchange membrane 3 a side as the anode 1 side, and a cation exchange membrane 3 b side as the cathode 2 Side configuration. In the apparatus of Fig. 4, the anode chamber 8 and the cathode chamber 9 are connected by a water passage 17 through which water can pass. In order to obtain soft water with the apparatus of FIG. 4, it is preferable to fill the cation exchange resin chamber 11 with water or saline. Then, water (tap water, etc.) is supplied to the anode chamber 8, and the water passing through the anode chamber 8 is supplied to the cathode chamber 9 through the water channel 17, and a voltage is applied between the anode 1 and the cathode 2 to thereby apply a voltage between the anode 1 and the cathode 2. When the electrode membrane 3 electrically decomposes water or brine, the generated Η + ions are supplied to the cation exchange resin chamber 丨 1 through the region 15, and Ca 2 + ions in the cation exchange resin 7 filled with 塡 in the chamber or Mg2 + ions etc. are ion-exchanged to regenerate the cation exchange resin 7. The cations such as Ca2 + ions or Mg2 + ions generated by the regeneration of the cation exchange resin 7 are pulled by the potential near the cathode 2 side, and the cations The exchange resin chamber 11 is discharged to the cathode chamber 9. According to the water treatment device of the present invention, the ion exchange resin can be regenerated at a low cost by electrolysis. Furthermore, from the -20-

200526526 (18) Description of the first embodiment to the fourth embodiment, the water supply during ion exchange regeneration is only described in the form of the water cathode chamber 9 to be discharged from the anode chamber 8, but may be supplied to the cathode chamber 9 first Supply the water to the anode chamber 8. Among them, if the former order is adopted, the anode chamber 8 can reduce the Ca2 + ions in the water by the power of the voltage, and therefore, it can also suppress the generation of calcium scale in the cathode chamber 9. Furthermore, in the conventional electrolysis of water on the electrode surface, a voltage of at least 1 · 2 3 V of the electrolysis potential of water was required to cause it. However, in the electrolysis of the root membrane, a voltage of 0.83 V was able to generate η + Ion ion. Therefore, in the first embodiment to the fourth embodiment, only one set of cation exchange resin chambers and bipolar membranes are shown (the embodiment and the second embodiment further have an anion exchange resin, but these are assembled in parallel to the anode The shape between 1 and cathode 2 can reduce the amount of electricity that generates Η + ions and Η 离子. In this case, the resin is switched to the discharge and the reaction decreases due to concentration reduction. According to the description of bipolar and OH * In room 1), the state is also required by Riko

[Examples] Hereinafter, the present invention will be described more specifically based on examples. It is not limited to these examples. Example 1 In this Example 1, the water treatment apparatus shown in FIG. 1 was used to regenerate cation exchange resin and anion exchange resin. In the above device ', the anode 1 uses a titanium-coated titanium plate, and the cathode 2 uses the present invention to perform undertreatment. F rust steel -21-200526526 (19)

The width of the anion exchange resin chamber 10 and the cation exchange resin chamber 11 is 15 mm, and the width of the anode chamber 8 and the cathode chamber 9 is 2 mm, respectively. The distance between the electrodes (anode 1 and cathode The distance between 2) is 3 4 mm in total. The electrode area of each of the anode 1 and the cathode 2 was 180 mm × 100 mm. As the bipolar membrane 3, a bipolar membrane BP-1E (trade name) (thickness: 200 μm) manufactured by TOKUYAMA was used, while a cation exchange resin was Diaion SK1B (trade name) manufactured by Nihon Chemical Co., and an anion exchange resin was manufactured by Mitsubishi Chemical Co., Ltd. Diaion SA1A (trade name). As the separators 4 and 5, a hydrophilic PTFE nonwoven fabric "SGT010T135" (thickness: 135 µm) manufactured by Japan GORE-TEX was used. In addition, since the bipolar membrane and the separator are so thin, these thicknesses are ignored when setting the distance between the electrodes described above (the same applies to Examples 2 to 4 described later). In this water treatment apparatus, the water to be treated is provided with water to be treated after passing the water to be treated through the anion exchange resin chamber 10 and the cation exchange resin chamber 11 to obtain pure water through the two resin chambers. In addition, since ions discharged to each electrode chamber by regeneration are discharged to the outside of the apparatus, tap water is passed through the anode chamber 8 and the cathode chamber 9 to provide a drainage water path, and then discharged to the outside of the apparatus. Regarding the ion exchange resin, 250 ml of Η + -type cation exchange resin was charged into cation exchange resin chamber 1], and 250 ml of 0Η-type anion exchange resin was charged into anion exchange resin chamber 10. At the time of implementation, in order to reduce the ion-exchange energy of the ion-exchange resin, the drainage water channel was stopped, and the treated water adjusted with potassium chloride to a hardness of 100 was circulated at a flow rate of 2.0 L / mi η. After treatment, the hardness of -22- 200526526 (20) will not decrease to less than 90, which will reduce the ion exchange energy of ion exchange resin. As described above, after reducing the ion exchange energy of the ion exchange resin, the ion exchange resin is regenerated as follows.

That is, the water to be treated is stopped by a water circuit, and a current of 1.0 A is passed between the electrodes to regenerate the ion exchange resin. When regenerating the ion exchange resin, tap water with a hardness of 50 was passed through the drainage channel at 0.2 L / min. Regeneration was performed for 6 hours. During the regeneration process, the discharged water had an average hardness of 180, confirming that the ion exchange energy of the cation exchange resin was regenerated. After the regeneration treatment was performed, the drainage water passage was stopped. When the treated water passage was passed at a flow rate of 2.0 L / min to adjust the treated water to a hardness of 100, pure water having a hardness of less than 5 and a pH of 7 was obtained. This confirmed that the anion exchange resin and the cation exchange resin were regenerated separately. Embodiment 2 In this embodiment 2, a cation exchange resin and an anion exchange resin are regenerated using a water treatment apparatus as shown in FIG. In the above water treatment device, the anode 1 uses a titanium-coated titanium plate, and the cathode 2 uses a stainless steel plate, and the anion exchange resin chamber] is formed. The width of the cation exchange resin chamber 11 (the distance in the horizontal direction in FIG. 2) is respectively 15 mm, the width of the anode chamber 8 and the cathode chamber 9 are 2 nim, the width of the area 14 and the area I 5 are 2 mm, and the distance between the electrodes (the distance between the anode 1 and the cathode 2) ) Make a total of 38 mm. In addition, the electrode area is -23-200526526 (21) Both the electrode 1 and the cathode 2 are 180 m x 100 m. As the bipolar membrane 3, bipolar membrane BP-1E (trade name) manufactured by TOKUYAMA was used, while the cation exchange resin was Diaion SK1B (trade name) manufactured by Mitsubishi Chemical Corporation, and the anion exchange resin was Diaion SA1A manufactured by Mitsubishi Chemical Corporation. (Product name). As the separators 4, 5, 12, and 13, a hydrophilic PTFE nonwoven "SGT100T100" (thickness 1 0 0 μιη) manufactured by JAPAN GORE-TEX was used.

In this water treatment device, the treated water is passed from the anode chamber 8 through the anion exchange resin chamber 10 and then through the cation exchange resin chamber 11 and the cathode chamber 9 to the treated water area water path 16 to obtain pure water through the two resin chambers. water. In addition, since the ions discharged to the respective electrode chambers by regeneration are discharged to the outside of the apparatus, tap water 17 is provided so that tap water passes through the anode chamber 8 and then passes through the cathode chamber 9, and is then discharged to the outside of the apparatus. Regarding the ion exchange resin, a cation-exchange resin of 2 + type 250 m 1 塡 was charged into the cation exchange resin chamber 11, and an anion exchange resin of OIT type 250 ml 塡 was charged into the anion exchange resin chamber 1 0. At the time of implementation ', in order to reduce the ion-exchange energy of the ion-exchange resin, the drainage water channel 17 was stopped, and the treated water adjusted with potassium chloride to a hardness of 1,000 at a flow rate of 2.0 L / mi η was circulated. Even if it is processed, the hardness of the ion exchange resin will not decrease to less than 90, so that the ion exchange energy of the ion exchange resin will be reduced. As described above, after reducing the ion exchange energy of the ion exchange resin, the ion exchange resin is regenerated as follows. That is, the water to be treated is stopped from the water channel 16 and the current of I. 〇 A is energized-24- 200526526 (22) Between the electrodes to regenerate the ion exchange resin. When regenerating the ion-exchange resin, tap water with a hardness of 50 was passed through the drainage channel at 0.2 L / m i η per minute. Regeneration was performed for 6 hours. During the regeneration process, the discharged water had an average hardness of 180, confirming that the ion exchange energy of the cation exchange resin was regenerated.

After the regeneration treatment was performed, the drainage water channel 17 was stopped, and the treated water channel was circulated at a flow rate of 2.0 L / mi η to adjust the treated water to a hardness of 1,000. The hardness was less than 5 and the pH was medium. Pure water in sexual areas. This confirmed that the anion exchange resin and the cation exchange resin were regenerated separately. Embodiment 3 In this embodiment 3, a cationic ion exchange resin was regenerated using a water treatment apparatus as shown in Fig. 3. In this water treatment device, the anode 1 uses a platinum-coated titanium plate, the cathode 2 uses a stainless steel plate, the width of the cation exchange resin chamber 11 is made 15 mm, and the width of the anode chamber 8 and the cathode chamber 9 is made 2 mm. The total distance between the electrodes was 19 mm. As the bipolar membrane 3, bipolar membrane BP-1E (trade name) manufactured by TO KU YAM A was used, and as the cation exchange resin, Diaion SK1B (trade name) manufactured by Mitsubishi Chemical Corporation was used. As the separator, a hydrophilic PTFE nonwoven "SGT010T135" manufactured by Japan GORE-TEX was used. In this water treatment device, the water to be treated is set to -25- 200526526 (23) for the water to be treated after passing the water to be treated through the anion exchange resin chamber 10 and the cation exchange resin chamber π, and the water to be treated is passed through the cation exchange. Resin chamber 1 1 'obtains soft water. In addition, since the ions discharged to each electrode chamber by regeneration are discharged to the outside of the apparatus, a tap water passage is provided so that tap water passes through the anode chamber 8 and then passes through the cathode chamber 9, and is then discharged to the outside of the apparatus. As a cation exchange resin, 250 ml of an H + type cation exchange resin was used.

When regenerating the cation exchange resin, first, in order to reduce the cation exchange energy of the cation exchange resin, the drainage water channel was stopped, and the potassium chloride was adjusted to a hardness of 100 with a flow rate of 2.0 L / min. Water circulates. Even if it is processed, the hardness does not decrease below 90, and the cation exchange energy of the cation exchange resin is reduced. As described above, after reducing the cation exchange energy of the cation exchange resin, the ion exchange resin is regenerated as follows. That is, the water to be treated is stopped with water, and a current of 1.0 A is passed between the electrodes to regenerate the cation exchange resin. When regenerating the cation exchange resin, tap water with a hardness of 50 was passed through the drainage channel at 0.2 L / min. Regeneration was performed for 6 hours. The average hardness of the discharged water during the regeneration process was 170, confirming that the cation exchange resin was regenerated. After the regeneration treatment was performed, the drainage water channel was stopped. When the treated water channel was circulated at a flow rate of 2.0 L / min and adjusted to a hardness of 100, soft water having a hardness of less than 5 was obtained. This confirmed that the cation exchange energy of the cation exchange resin was regenerated. Example 4 -26-200526526 (24) In this example 4, a cationic ion exchange resin was regenerated using a water treatment apparatus as shown in FIG.

In this water treatment device, the anode 1 uses a titanium-coated titanium plate, the cathode 2 uses a stainless steel plate, the width of the cation exchange resin chamber 11 is 15 mm, and the width of the anode chamber 8 and the cathode chamber 9 is 2 mm. , The width of the area 15 is made 2 mm, and the total distance between the electrodes is made 2 1 mm. As the bipolar membrane 3, bipolar membrane BP-1E (commercial name) manufactured by TOKUYAMA was used, and as the cation exchange resin, Diaion SK1B (commercial name) manufactured by Mitsubishi Chemical Corporation was used. As the separator, a hydrophilic PTFE nonwoven fabric "SGT100T100" manufactured by JAPAN GORE-TEX was used. Further, in this water treatment apparatus, a water path for treated water is provided to pass the treated water from the cathode chamber 9 through the cation exchange resin chamber, and the treated water passes through the cation exchange resin chamber 11 to obtain soft water. In addition, since the ions discharged to each electrode chamber by regeneration are discharged to the outside of the apparatus, tap water is passed through the anode chamber 8 and the cathode chamber 9 to provide a drainage water channel 17 and then discharged to the outside of the apparatus. As the cation exchange resin, 250 ml of H + type cation exchange resin was used. When regenerating the cation exchange resin, first, in order to reduce the cation exchange energy of the cation exchange resin, the drainage water channel 7 was stopped, and the potassium chloride was adjusted to a hardness of 1 0 at a flow rate of 2.0 L / mi η. The treated water circulates, and even if it is treated, the hardness does not decrease below 90, and the cation exchange energy of the cation exchange resin is reduced. As described above, after reducing the cation exchange energy of the cation exchange resin, the ion exchange resin is regenerated as follows. -27- 200526526 (25) That is, the water to be treated is stopped with water, and a current of 1.0 A is applied between the electrodes to regenerate the cation exchange resin. When regenerating the cation exchange resin, tap water with a hardness of 50 was passed through the drainage channel at 0.2 L / min. Regeneration was performed for 6 hours. The average hardness of the discharged water during the regeneration process was 170, and it was confirmed that the cation exchange resin was regenerated.

After the regeneration treatment was performed, the drainage water channel was stopped, and the treated water channel was circulated at a flow rate of 2.0 L / min to adjust the treated water with a hardness of 100 to obtain soft water with a hardness of less than 5. This confirmed that the cation exchange energy of the cation exchange resin was regenerated. [Brief Description of the Drawings] Fig. 1 is a diagram schematically showing an example of a water treatment device according to the present invention. ® 2 is a diagram schematically showing another example of the water treatment device of the present invention ® 3 is a diagram schematically showing an example of the water treatment device of the present invention. ® 4 is a diagram schematically showing another example of the water treatment device of the present invention. [Description of main element symbols] 1 ··· Anode 2 ... Cathode 3 ··· Bipolar membrane 4 ... Separator 5 ·· Separator 6 ··· Anion exchange resin> 28- 200526526 (26) 7 ... Cation exchange resin 8 ... Anode chamber 9 ... Cathode chamber 10 ... Anion exchange resin chamber 1 1 ... Cation exchange resin chamber 12 ... Separator 1 3 ... Separator

1 4 ... area separated by a bipolar membrane and a membrane used to form an anion exchange resin chamber 1 5 ... area separated by a bipolar membrane and a membrane used to form a cation exchange resin chamber 1 6 ... waterway 1 7 …waterway

-29-

Claims (1)

200526526 (1) X. Scope of patent application Zhiyang Jiaozuo District, Zhiyin Youzi Institute, the tree and the membrane with a membrane-reversing membrane, the anode pole, Jiaoyangyi, and Gemini from the film, described from the side of the room to change the upper penis ® intercourse with the description •• On the yin membrane of the yangzi, there are signs of separation and septum. The yin and yin are located in the special room, and its poles are lipid-based, lipid-based, and electric and tree rooms. Lipid replacement is installed on the lipophilic tree and the tree, the tree poles are changed, and the mi pole is changed to the cation and ionization, which is separated from the water and electricity, and the 17 sub-ion membranes are charged and charged. The poles are converted to the compartments of the upper and lower compartments of the upper and lower compartments, and the cathode compartments are based on the cathodes and regions. The separator of the compartment is used for separation. The bipolar membrane is arranged with the anion exchange membrane side and the ion exchange membrane side as the cathode side. It also has the following mechanism: by applying a voltage to the anode, water or Saltwater electric OHT ion or H + ion regeneration of the above anion exchange resin or the above cation exchange resin chamber The ions exchanged by the regeneration are passed through the electrode chamber or the cathode chamber. 2. A water treatment device, characterized in that a pair of electrodes is constituted, and between the electrodes, an electrode chamber, an anion exchange resin chamber, and an anion exchange resin are used as the anode side, and the anode is connected to the above The cathode is gasified and decomposed, and the anion cation exchange resin generated in the resin exchange chamber is discharged to the above anode: the anode and the cathode side have the anode exchange membrane and the cation exchange in sequence-30- 200526526 (2 ) A bipolar membrane, an anode exchange resin chamber, and a cathode chamber for membrane exchange. The anion exchange resin chamber is filled with anion exchange resin in a space separated by two membranes. The cation exchange resin chamber is formed by two membranes. The separated space is filled with a cation exchange resin, and the anode chamber is separated by the anode and a separator that separates the anion exchange resin chamber. The cathode chamber is separated by the cathode and a separator that separates the cation exchange resin chamber, and the bipolar membrane is separated between the anion exchange resin chamber and the cation exchange resin chamber by a tree anion exchange resin chamber. The cathode-side diaphragm and the anode-side diaphragm that separate the cation exchange resin chamber are spaced apart, and the anion exchange membrane side is set as the anode side and the cation exchange membrane side is set as the cathode side. The bipolar membrane and the anion exchange resin are arranged. The area separated by the chamber and the area separated by the bipolar membrane and the cation exchange resin chamber are connected by a water channel, and have the following mechanism: by applying a voltage between the anode and the cathode The bipolar membrane electrically decomposes water or brine, and regenerates the anion exchange resin in the anion exchange resin chamber or the cation exchange resin in the cation exchange resin chamber with the generated OH_ ions or H + ions, and is subjected to the ions subjected to regeneration. The exchanged ions are discharged to the above-mentioned anode chamber or cathode chamber by a voltage force. 3. If the water treatment device of scope 1 or 2 of the patent application, -31-200526526 (3) Regenerating the cation exchange resin with H + ions generated by the electrical decomposition of water or brine, will be regenerated and ionized The exchanged cations are discharged from the cation exchange resin chamber to the cathode chamber, and the anion exchange resin 〇 ·· generated by the electrical decomposition of water or brine is discharged from the anion exchange resin chamber. To the anode compartment. 4. The water treatment device according to item 1 or 2 of the patent application scope, wherein only the cation exchange resin is regenerated and discharged, and the cations which are ion exchanged by the regeneration are discharged. 5 · A water treatment device characterized by having a pair of electrodes consisting of an anode and a cathode, and between the electrodes, an anode chamber, an anion exchange resin chamber, and an anion exchange membrane and a cation exchange membrane are arranged in this order from the anode side. A bipolar membrane, an anode exchange resin chamber, and a cathode chamber, the cation exchange resin chamber is filled with a cation exchange resin in a space separated by a separator and the bipolar membrane, and the anode chamber is based on the anode and the bipolar The cathode compartment is separated by the cathode and a separator that separates the cation exchange resin compartment. The bipolar membrane system uses the anion exchange membrane side as the anode side and the cation exchange membrane side as the cathode side. It is also equipped with the following mechanism: by applying a voltage between the anode and the cathode, water or brine is electrically decomposed in the bipolar membrane, and the cation exchange resin is regenerated with the generated H + ions, and will be subjected to the regeneration station. The ion exchanged cations are discharged from the cation exchange resin chamber to the cathode chamber by a voltage force. -32- 200526526 (4) 6. A water treatment device characterized by having a pair of electrodes composed of an anode and a cathode, and between the electrodes, an anode chamber, an anion exchange resin chamber, A bipolar membrane, an anode exchange resin chamber, and a cathode chamber that are bonded to an anion exchange membrane and a cation exchange membrane. The above cation exchange resin chamber is filled with cation exchange resin in a space separated by two separators. The anode chamber is separated by the anode and the bipolar membrane, the cathode chamber is separated by the cathode and a cathode-side separator that isolates the cation exchange resin chamber, and the bipolar membrane is separated by the cation exchange The anode side diaphragm of the resin chamber is separated by a member, and the anion exchange membrane side is set as the anode side and the cation exchange membrane side is set as the cathode side, and it has the following mechanism: by applying between the anode and the cathode The voltage 'electrically decomposes water or brine at the bipolar membrane, and regenerates the cation exchange resin with the generated erbium ions, and discharges the cations exchanged by the regeneration by the voltage force from the cation exchange resin chamber to the cathode chamber. -33-