JP2001212567A - Electric regeneration type desalting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric regeneration type desalting apparatus avoiding excessive concentration of ions in electrode chambers, preventing the deterioration of an ion exchange membrane, by alkali attack suppressing the corrosion of electrodes and the generation amount of hydrogen and oxygen by electrolysis, removing dissolved oxygen in circulating concentrated water, suppressing the increase of dissolved oxygen of a desalting chamber and capable of achieving the recovery ratio of ultrapure water almost equal to that of a conventional electric regeneration type desalting apparatus. SOLUTION: In the electric regeneration type desalting apparatus wherein desalting chambers 5 and concentration chambers 6 are arranged between electrode chambers (anode chamber 2, cathode chamber 7) to be filled with an ion exchanger and cation exchange membranes or anion exchange membranes are alternately arranged between the respective chambers, the electrode chambers are formed as desalting constitution removing ions and concentrated water is introduced into the concentration chamber and the electrode chambers while the outlet water of the electrode chambers is converted to concentrated water through a vacuum degassing membrane device 19 to be introduced into the concentration chambers and the electrode chambers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric regeneration type desalination apparatus having a structure in which an ion exchanger is filled between ion exchange membranes. The present invention relates to a desalination apparatus.

[0002]

2. Description of the Related Art In this type of electric regeneration type desalination apparatus, a cation exchange membrane and an anion exchange membrane are alternately arranged between pole chambers via a chamber frame, and a desalination chamber and a concentration chamber are alternately arranged. Each of the chambers is filled with an ion exchanger. This electric regeneration type desalination apparatus is an apparatus for obtaining ultrapure water using, for example, RO treated water containing electrolytes (treated water obtained by removing fine particles of 1 micrometer (μm) or more through a reverse osmosis membrane) as raw water, and an ion exchange resin. Widely used in place of the method.

As shown in FIG. 1, an electric regeneration type desalination apparatus has an anode 1, an anode chamber 2, an anion exchange membrane (anion exchange membrane) 3-） a desalination chamber 5, a cation exchange membrane (cation exchange membrane). ) 4-concentration chamber 6-anion exchange membrane 3｝-
-{Desalting room 5-cation exchange membrane 4-concentrating room 6-anion exchange membrane 3}-desalting room 5-cation exchange membrane 4-cathode room 7-
The cathodes 8 are arranged in this order. And anode room 2
The cathode chamber 7 has a function of a concentrating chamber in which ions are gathered.

The anode compartment 2, the cathode compartment 7, and the concentration compartment 6
, A liquid in the pole chamber is discharged (returned to the raw water tank containing the RO treated water), and part or all of the outlet water from the concentrating chamber exiting from the concentrating chamber 6 is circulated as the concentrated water 9. . That is, raw water is mixed with the outlet water of the concentration chamber as dilution water,
It is supplied and circulated to the pole chamber (anode chamber 2 and cathode chamber 7) and the concentrating chamber 6 as concentrated water. Demineralized water from the desalination chamber 5 is obtained as ultrapure water 10. Note that, in FIG.
Numeral 12 is a cell holding plate.

[0005] In the electric regeneration type desalination apparatus having the above structure,
When the ion concentration in both the anode chamber 2 and the cathode chamber 7 increases, the so-called membrane scorch occurs in which the ion exchange membranes of the anion exchange membrane 3 and the cation exchange membrane 4 are discolored. There is a problem that the function is deteriorated, and it is necessary to periodically replace the ion exchange membrane. In addition, there were also problems such as a large amount of hydrogen and oxygen generated in the cathode chamber 7 and the anode chamber 2 due to hydrolysis. In addition, if the raw water contains ions that corrode the electrodes of the anode 1 and the cathode 8, the ions are concentrated in the anode chambers 2 and the cathode chambers of the cathode chamber 7, and the corrosion of the electrodes becomes severe. There is also.

As a countermeasure against the problem that the ion concentration rises in the above-mentioned pole room, as shown in FIG. 2, both the anode room 2 and the cathode room 7 have a function as a desalting room, that is, a function for removing ions. In addition to avoiding over-concentration and preventing film burning, the amount of hydrogen H ₂ generated in the vicinity of the cathode 8 of the cathode chamber 7 and oxygen O ₂ generated in the vicinity of the anode 1 of the anode chamber 2 due to hydrolysis is increased. It can be suppressed. In FIG. 2, the anode 1
-Anode chamber 2-Cation exchange membrane 4- {Concentration chamber 6-Anion exchange membrane 3-Desalination chamber 5-Cation exchange membrane 4}
{Concentration room 6-anion exchange membrane 3-desalination room 5-cation exchange membrane 4} -Concentration room 6-anion exchange membrane 3-cathode room 7-cathode 8 It has the function of a desalination chamber to remove water.

Even when the electric regeneration type desalination apparatus is constructed as shown in FIG. 2, the water at the outlet of the pole room has a smaller amount of ions than the water at the inlet of the pole room and has much better water quality than the water at the outlet of the concentration chamber. However, it is not only wasteful to discharge the water at the outlet of the pole chamber, but also it is necessary to discharge more water at the outlet of the enrichment chamber due to the balance of ions. You will need it. Thereby, the pure water recovery rate indicating how much ultrapure water is selected from the raw water is significantly deteriorated.

[0008] Therefore, by recirculating the pole chamber outlet water as concentrated water, it is possible to maintain the pure water recovery rate as before, but the pole chamber outlet water contains hydrogen H ₂ and oxygen generated by hydrolysis. O ₂ has dissolved, comes out problems such as the concentration of oxygen to the desalting compartment 5 introduced electrode chamber and the concentration chamber 6 of the anode compartment 2 and the cathode compartment 7 as concentrated water is increased.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is intended to prevent overconcentration of ions in an electrode room, prevent burning of an ion-exchange membrane, suppress corrosion of an electrode, and reduce water degradation. To reduce the amount of hydrogen and oxygen generated by water, remove the amount of dissolved oxygen in the circulating concentrated water, suppress the increase in dissolved oxygen in the desalination chamber, and recover ultrapure water that is almost equivalent to conventional electric regeneration type desalination equipment. It is an object of the present invention to provide an electric regenerative desalination apparatus capable of achieving a high efficiency.

[0010]

According to the first aspect of the present invention, a desalting chamber and a concentrating chamber are arranged between pole chambers, and each chamber is filled with an ion exchanger. In a regenerative desalination apparatus in which cation exchange membranes or anion exchange membranes are alternately arranged between the chambers of the section, the pole chamber has a desalination configuration in which ions are removed, and concentrated water is supplied to the concentration chamber and the pole chamber. In addition to the introduction, the outlet water of the electrode chamber is introduced as concentrated water into the concentration chamber and the electrode chamber via a vacuum degassing membrane device.

As described above, since the pole chamber is desalted,
It is possible to avoid overconcentration of ions in the pole room, prevent burning of the ion exchange membrane, and suppress the generation of hydrogen and oxygen due to hydrolysis. In addition, the water at the outlet of the pole chamber is introduced into the concentrating chamber and the pole chamber as concentrated water via the vacuum degassing membrane device and circulated, thereby maintaining substantially the same pure water recovery rate as that of the conventional electric regeneration type desalination apparatus. As well as removing dissolved oxygen in the concentrated water with a vacuum degassing membrane device,
It is possible to suppress an increase in dissolved oxygen in the desalting chamber.

According to a second aspect of the present invention, a desalting chamber and a concentrating chamber are arranged between the pole chambers, each chamber is filled with an ion exchanger, and a cation exchange membrane is provided between at least some of the chambers. Alternatively, in an electric regeneration type desalination apparatus in which anion exchange membranes are alternately arranged, the electrode chamber has a desalination configuration in which ions are removed, and an electrode solution circulation system for circulating a liquid in the electrode chamber is provided. A circulating system is provided with a vacuum degassing membrane device.

[0013] By providing the polar liquid circulation system for circulating the liquid in the polar chamber as described above, by using pure water from which corrosive ions have no or eliminated corrosive ions, the polar chamber has a desalination structure. Therefore, ions do not enter from the raw water, and the electrode does not corrode. Further, by providing a vacuum degassing membrane device in the polar liquid circulation system, dissolved oxygen in the polar liquid can be removed, so that an increase in dissolved oxygen in the desalting chamber can be suppressed.

[0014] The invention according to claim 3 provides the invention according to claim 2.
In the electric regeneration type desalination apparatus according to the above, a gas-liquid separator is provided at the outlet of the polar chamber of the polar liquid circulation system, and the gas-liquid separator is provided with a liquid level detector that detects a liquid level, When the water content falls below a predetermined level, treated water desalted in a desalination chamber is introduced into the gas-liquid separator.

By providing the gas-liquid separator at the outlet of the polar chamber in the polar liquid circulation system as described above, it becomes possible to separate hydrogen, oxygen, and the like generated in the polar chamber from the gas polar chamber outlet water. . In addition, a liquid level detector is provided in the gas-liquid separator, and when the liquid level falls below a predetermined level, treated water desalinated in a desalination chamber is introduced into the gas-liquid separator, so that the amount of polar liquid is insufficient. In this case, it is possible to replenish the desalted treated water, that is, ultrapure water, and to always maintain the electrode solution amount at a predetermined amount.

The invention described in claim 4 is the same as the invention described in claim 2.
In the electric regeneration type desalination apparatus according to the above, a gas-liquid separator is provided at the outlet of the pole chamber of the pole liquid circulation system, and desalinated water desalinated in the desalination chamber is introduced into the pole liquid circulation system. It is characterized in that a desalination treatment water introduction flow path is provided.

By providing the desalinated water introduction passage for introducing the desalinated water desalinated in the desalination chamber as described above into the polar liquid circulation system, a desalinated treated water introduction passage having a simple structure is provided. Through the process, the reduced amount of the polar solution can always be replenished with desalted water (ultra pure water).

The invention described in claim 5 is the same as the claim 4.
In the electric regenerating type desalination apparatus according to the above, the gas-liquid separator is provided with a discharge channel for discharging the polar liquid overflowing from the upper part.

Since the gas-liquid separator is provided with a discharge channel, if a large amount of desalinated water to be introduced into the polar liquid circulation system through the desalinated water channel overflows from the upper portion of the gas-liquid separator, the overflowed liquid is Can be discharged.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The schematic configuration of the electric regeneration type desalination apparatus according to the present invention is the same as that shown in FIG. 2, and the anode chamber 2 and the cathode chamber 7 have a desalination structure having a function of removing ions.

FIG. 3 is a diagram showing an example of a system configuration of an electric regeneration type desalination apparatus according to the present invention. Raw water (R
O treated water, etc.) is supplied through the pipe 20 and the concentration chamber 6,
Concentrated water is supplied to the pole chambers of the anode chamber 2 and the cathode chamber 7 through a pipe 22. The exit water of the pole chamber from the pole chamber passes through the pipe 13 and is introduced into the gas-liquid separator 14, where the gas of hydrogen H ₂ and oxygen O ₂ contained in the exit water of the pole chamber is separated and discharged. The water from the pole chamber from which gas has been removed by the gas-liquid separator 14 is introduced by a pump 18 into a vacuum degassing membrane device 19 equipped with a vacuum pump 19a, where dissolved oxygen O _{2 and the} like dissolved in the pole chamber outlet water Dissolved gas is removed.

The outlet water of the enrichment chamber from the enrichment chamber 6 is led through the pipe 16 and a part of the water is discharged through the pipe 15 (returned to the RO raw water tank), and the rest is the raw water introduced through the pipe 20 as dilution water. , And further mixed with the outlet water of the electrode chamber that has exited the vacuum degassing membrane device 19, and supplied to the anode chamber 2, the enrichment chamber 6, and the cathode chamber 7 through a pipe 22 by a pump 21. That is, part of the outlet water of the pole chamber and the outlet water of the concentration chamber are recirculated as concentrated water. Further, the outlet water of the desalting chamber from the desalting chamber 5 is recovered as ultrapure water through the pipe 23.

As described above, the pole chambers of the anode chamber 2 and the cathode chamber 7 are desalted, so that overconcentration of ions in the pole chamber can be avoided. Therefore, it is possible to prevent burning of the ion exchange membrane and to reduce hydrogen H ₂ and oxygen O ₂ due to hydrolysis.
Can be suppressed. Gas-liquid separation side separator 1
After separating gases such as hydrogen H ₂ and oxygen O _{2 in} 4, the dissolved gas such as dissolved oxygen is removed by the vacuum degassing membrane device 19.
An increase in dissolved oxygen in the desalting chamber 5 can be suppressed. (Although not shown, hydrogen H ₂ and oxygen O ₂ are separated by separate separators, and those passing through a vacuum deaerator are on the oxygen O ₂ side,
Even if the hydrogen H ₂ side is bypassed and circulated, an increase in dissolved oxygen in the desalting chamber 5 can be suppressed. )

[0024] Further, by employing the desalting configuration of the pole room, the ion amount of the pole room outlet water is smaller than the ion amount of the pole room inlet water, and the water quality is much better than the concentration room outlet water. Therefore, it is not only wasteful to discharge the outlet water from the pole chamber as described above, but also from the balance of ions, it is necessary to discharge more outlet water from the enrichment chamber. A large amount of raw water is required, and the pure water recovery rate is significantly reduced. Therefore, here, a part of the outlet water of the pole chamber is preferentially introduced as concentrated water into the concentrating chamber 6 and the pole chamber (the anode chamber 2 and the cathode chamber 7) and circulated, whereby the conventional electric regeneration type desalination apparatus is used. It is possible to maintain the same pure water recovery rate as that of.

FIG. 4 is a diagram showing an example of a system configuration of an electric regeneration type desalination apparatus according to the present invention. The electric regenerative desalination apparatus includes a plurality (three in the figure) of electric regenerative desalination units 10.
0-1 to 100-3, and the pole chamber outlet water from the pole chamber (the anode chamber 2 or the cathode chamber 7) of each of the electric regeneration type desalination units 100-1 to 100-3 is collected by the pipe 13 and The gas is introduced into the liquid separator 14, and the gas is separated and discharged. The electrode chamber outlet water from which the gas has been separated and discharged is sent to a vacuum degassing membrane device 19 by a pump 18 to remove dissolved gases such as dissolved oxygen.

Each of the electric regeneration type desalination units 100-1 to 100-1
The condensing chamber outlet water from the concentrating chamber 6 of 00-3 is collected in the pipe 16, a part of which is discharged through the pipe 15 (returned to the RO raw water tank), and the rest is raw water introduced through the pipe 20 as dilution water. And further mixed with the above vacuum degassing membrane device 19
Is mixed with the water at the outlet of the electrode chamber,
2 to the anode chamber 2, the concentration chamber 6 and the cathode chamber 7.

The vacuum degassing membrane device 19 removes dissolved gas such as dissolved oxygen in water by dividing water and liquid inside and outside with a large number of hollow fiber membranes and evacuating the gas side. Is what you do.

FIG. 5 is an exploded perspective view showing a schematic configuration of an electric regeneration type desalination apparatus according to the present invention. This electric regeneration type desalination apparatus has an anode 1-an anode chamber 2-a cation exchange membrane 4- {a concentration chamber 6-an anion exchange membrane 3-a desalination chamber 5-a cation exchange membrane 4}.
・ ・ ・ ・ ・ ・ ｛Concentration room 6-anion exchange membrane 3-desalination room 5
-Cation exchange membrane 4｝-Concentration chamber 6-Anion exchange membrane 3-
It is the same as the case of FIG. 2 in that the cathode chamber 7 and the cathode 8 are arranged in this order, and the both pole chambers have a desalination chamber function of removing ions.

In the electric regeneration type desalination apparatus, the electrode solution 24 is provided with the hole 11 a provided in the cell holding plate 11 and the chamber frame 2 of the anode chamber 2.
The ion-exchanger (not shown) is introduced into the filled anode chamber 2-1b through the hole 2-1a provided in the first chamber 1, and the polar liquid 24 that has exited the anode chamber 2-1b is supplied to the chamber frame 2-a. 2-1c provided in cell 1 and hole 11b provided in cell holding plate 11
There is provided an anolyte circulation system (not shown) which circulates through. Also, the hole 12a provided in the cell holding plate 12 for the electrode solution 24 and the hole 7-1a provided in the chamber frame 7-1 of the cathode chamber 7 are provided.
Is introduced into the cathode compartment 7-1b filled with an ion exchanger (not shown), and exits the cathode compartment 7-1b. The anolyte 24 passes through the hole 7-1c provided in the chamber frame 7-1. Further, there is provided an extreme liquid circulation system (not shown) which circulates through a hole 12b provided in the cell suppressing plate 12.

The anode chamber 2 (anode chamber section 2-1b) and the cathode chamber 7 (cathode chamber section 7-1b) are filled (circulated) with pure water having no or no corrosive ions as the anolyte 24. Then, drive. By providing the anode compartment 2 and the cathode compartment 7 with a function as a desalination compartment, ions do not enter from the raw water. Therefore, the electrodes of the anode 1 and the cathode 8 do not corrode. Basically, it is not necessary to add the polar liquid, but it is convenient if a pipe for introducing the outlet water of the desalination chamber as makeup water is provided.

FIG. 6 is a diagram showing an example of a system configuration of an electric regeneration type desalination apparatus according to the present invention. In this electric regeneration type desalination apparatus, the outlet water from the anode compartments of the anode compartment 2 and the cathode compartment 7 is:
The gas is separated and discharged through the gas-liquid separator 14. The water discharged from the electrode chamber, which has been separated and discharged, is sent to a vacuum degassing membrane device 19 by a pump 18 to remove dissolved gases such as dissolved oxygen.
It is introduced into the pole room through a pipe 28. That is, the outlet water of the polar chamber is circulated through the polar liquid circulation system.

The gas-liquid separator 14 is provided with a liquid level detector 25 for detecting a liquid level. When the liquid level falls below a predetermined level, the electromagnetic valve 26 is activated. After opening, the desalted water (ultra pure water) obtained from the desalting chamber 5 through the pipe 23 is introduced into the gas-liquid separator 14. Therefore, when the amount of the polar solution is insufficient, the desalted ultrapure water is replenished and can be maintained at a predetermined amount. By providing the vacuum degassing membrane device 19 in the polar liquid circulation system, it is possible to remove dissolved gas such as dissolved oxygen in the polar liquid, and thus it is possible to suppress an increase in dissolved oxygen in the desalting chamber.

FIG. 7 is a diagram showing an example of a system configuration of an electric regeneration type desalination apparatus according to the present invention. In the present electric regeneration type desalination apparatus, the water is branched from a pipe 23 in which water from a desalination chamber outlet is collected,
A desalinated water introduction flow path 29 for introducing desalinated water (ultra pure water) is provided in the polar liquid circulation system in which the outlet water from the anode chamber 2 and the cathode chamber 7 circulates through the pipe 13. . As a result, a small amount of desalinated water is always introduced into the polar liquid circulation system, and the polar liquid overflowing from the gas-liquid separator 14 is returned to the RO raw water tank 31 through the pipe together with the separated gas. ing. Filtration water obtained by filtering well water or city water with an activated carbon filtration device or a pre-filter device is introduced into the RO raw water tank 31 through a pipe 30. The filtered water is introduced as an RO-treated raw water from which fine particles of 1 μm or more has been removed by an RO device 32 as dilution water through a pipe 20 into an electric regeneration type desalination device.

As described above, by supplying a small amount of the desalinated water to the polar liquid circulation system through the desalinated water introduction passage 29, the reduced amount of the polar liquid can be always replenished. As a result, as shown in FIG. 6, the replenishment system can be remarkably simplified because replenishment of the desalted water can be performed without providing the liquid level detector 25 and the electromagnetic valve 26. If the amount of replenishment treated water introduced into the polar liquid circulation system is 1% or less of the amount of desalted treated water obtained from the entire desalination chamber 5, it can be operated without any problem and is almost negligible. From the viewpoint of flow rate control and adjustment, even if the amount is increased, there is no problem in operation.

In the electric regeneration type desalination apparatus according to the present invention, the ion exchange membrane disposed between the desalting chamber 5 and the concentration chamber 6 has a cation exchange membrane (cation exchange membrane) 4 The configuration is not limited to the configuration in which the anion exchange membranes (anion exchange membranes) 3 are alternately arranged, and the cation exchange membrane 4 or the anion exchange membrane is provided between at least a part of the desalination chamber 5 and the concentration chamber 6. As long as the three are alternately arranged, the cation exchange membrane 4 or the anion exchange membrane 3 may be arranged continuously between the chambers in other parts.

[0036]

As described above, according to the first aspect of the invention, the following excellent effects can be expected.

(1) Since the electrode room is desalted, it is possible to avoid overconcentration of ions in the electrode room, prevent burning of the ion exchange membrane, and reduce the amount of hydrogen and oxygen generated by hydrolysis. Can be suppressed.

(2) In addition, the outlet water of the pole chamber is introduced into the concentrating chamber and the pole chamber as concentrated water via the vacuum degassing membrane device and circulated, thereby being substantially the same as the conventional electric regeneration type desalination device. Since the pure water recovery rate can be maintained and the dissolved oxygen in the concentrated water is removed by the vacuum degassing membrane device, it is possible to suppress an increase in the dissolved oxygen in the desalting chamber.

According to the second aspect of the present invention, since the electrode chamber is desalted, the effect of the above (1) can be expected as in the first aspect of the invention. Such effects can be expected.

(3) The amount of raw water to be introduced as a diluent can be reduced by introducing and circulating the water at the outlet of the electrode chamber through the vacuum degassing membrane device into the electrode chamber. It is possible to maintain almost the same pure water recovery rate as that of the desalination system, and remove the dissolved oxygen in the circulating pole room outlet water with a vacuum degassing membrane device, thereby suppressing the increase in the dissolved oxygen in the desalination room. Become.

(4) By providing an anolyte circulating system for circulating the liquid in the anodic chamber, using pure water free of corrosive ions or depleted water in the anolyte, the electrode chamber has a desalination structure. Because there is no ion from the raw water,
The electrodes do not corrode.

According to the invention of claim 3, according to claim 2,
The following effects can be expected in addition to the effects of the invention described in (1).

(5) By providing a gas-liquid separator at the outlet of the polar chamber of the polar liquid circulation system, it is possible to separate and discharge gases such as hydrogen and oxygen generated in the polar chamber from the outlet water of the polar chamber. .

(6) A liquid level detector is provided in the gas-liquid separator, and when the liquid level falls below a predetermined level, treated water desalted in the desalting chamber is introduced into the gas-liquid separator. When the amount is insufficient, the ultrapure water subjected to the desalination treatment is replenished, and the amount of the polar solution can be constantly maintained at a predetermined amount.

According to the fourth aspect of the invention, the following effects can be expected in addition to the effects of the second aspect of the invention.

(7) By providing a desalinated water introduction channel for introducing desalinated water desalinated in the desalination chamber into the polar liquid circulation system, the electrode can be passed through the desalinated water introduction channel. The reduced amount of the liquid can always be replenished with the desalinated water (ultra pure water), and the replenishment system for the desalinated water can be easily configured.

According to the fifth aspect of the invention, the following effects can be expected in addition to the effects of the fourth aspect of the invention.

(8) By providing the gas-liquid separator with a discharge channel, if a large amount of desalinated water introduced into the polar liquid circulation system through the desalinated water channel overflows from the upper part of the gas-liquid separator, The overflowing electrolyte can be discharged.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a schematic configuration of a conventional electric regeneration type desalination apparatus.

FIG. 2 is an exploded perspective view showing a schematic configuration of an electric regeneration type desalination apparatus according to the present invention.

FIG. 3 is a diagram showing a system configuration example of an electric regeneration type desalination apparatus according to the present invention.

FIG. 4 is a diagram showing an example of a system configuration of an electric regeneration type desalination apparatus according to the present invention.

FIG. 5 is an exploded perspective view showing a schematic configuration of an electric regeneration type desalination apparatus according to the present invention.

FIG. 6 is a diagram showing a system configuration example of an electric regeneration type desalination apparatus according to the present invention.

FIG. 7 is a diagram showing an example of a system configuration of an electric regeneration type desalination apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anode 2 Anode chamber 3 Anion exchange membrane (anion exchange membrane) 4 Cation exchange membrane (cation exchange membrane) 5 Demineralization chamber 6 Concentration chamber 7 Cathode chamber 8 Cathode 9 Concentrated water 10 Demineralized water (ultra pure water) 11 cells Suppression plate 12 Cell suppression plate 14 Gas-liquid separator 18 Pump 19 Vacuum degassing membrane device 21 Pump 24 Extreme liquid 25 Liquid level detector 26 Solenoid valve 29 Desalination treatment water introduction flow passage 31 RO raw water tank 32 RO device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/44 C02F 1/46 103 (72) Inventor Takayoshi Kawamoto 11-1 Haneda Asahimachi, Ota-ku, Tokyo Ebara in the F-term, Ltd. (reference) 4D006 GA17 HA47 JA30A JA43A JA44A JA56A JA70A KA31 KB11 KB17 KE21P KE21Q MA01 MA03 MA13 MA14 PB06 PC02 4D011 AA16 AA17 AD03 4D037 AA03 BA23 CA04 4D061 DA03 DB13 EA09 EB01 EB13 EB18 EB19 EB22 FA03 FA09 FA13

Claims (5)

[Claims] 1. A desalting chamber and a concentrating chamber are arranged between pole chambers, each chamber is filled with an ion exchanger, and cation exchange membranes or anion exchange membranes are alternately arranged between at least some of the chambers. In the electric regeneration type desalination apparatus, the electrode chamber is desalted to remove ions, concentrated water is introduced into the concentration chamber and the electrode chamber, and the electrode chamber outlet water is supplied to a vacuum deaeration membrane device. An electric regeneration type desalination apparatus, wherein the concentrated water is introduced into the concentrating chamber and the pole chamber via the condensed water. 2. A desalting chamber and a concentrating chamber are arranged between the pole chambers, each chamber is filled with an ion exchanger, and a cation exchange membrane or an anion exchange membrane is alternately arranged between at least some of the chambers. In the electric regeneration type desalination apparatus, the electrode chamber has a desalination configuration for removing ions, an electrode liquid circulation system for circulating a liquid in the electrode chamber is provided, and a vacuum degassing membrane device is provided in the electrode liquid circulation system. An electric regeneration type desalination apparatus characterized by comprising: 3. The desalination apparatus according to claim 2, wherein a gas-liquid separator is provided at an outlet of the polar chamber of the polar liquid circulation system, and a liquid level is detected by the gas-liquid separator. An electric regeneration type desalination apparatus comprising a liquid level detector, wherein when the liquid level falls below a predetermined level, treated water desalinated in the desalting chamber is introduced into the gas-liquid separator. 4. The desalination apparatus according to claim 2, wherein a gas-liquid separator is provided at an outlet of the pole chamber of the pole liquid circulation system, and desalination is performed in the desalination chamber. An electric regeneration type desalination apparatus comprising a desalination treatment water introduction flow path for introducing water into the polar liquid circulation system. 5. The electric regeneration type desalination apparatus according to claim 4, wherein the gas-liquid separator is provided with a discharge flow path for discharging the polar liquid overflowing from the upper part. .