JP2003039071A - Water treatment apparatus and water treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance water quality and to reduce the use amount of supply water or supply salt for accelerating electrolytic reaction, in a water treatment method and apparatus for sterilizing water to be treated using an electrolysis vessel. SOLUTION: In the water treatment apparatus equipped with a water tank for storing water to be treated, the electrolysis vessel for adding an electrolyte solution containing chloride ions to water to be treated introduced from the water tank to sterilize water to be treated by electrochemical reaction and a water treatment route for introducing water to be treated into the electrolysis vessel from the water tank to sterilize the same and refluxing the sterilized water to the water tank, a concentration device for concentrating and separating a soluble substance contained to water to be treated is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is stored in various water tanks, from large water tanks such as pools and bathtubs to water tanks arranged on rooftops of buildings and small water tanks such as baths for general households. The present invention relates to a novel water treatment device capable of sterilizing treated water.

[0002]

2. Description of the Related Art For example, a pool installed indoors or outdoors, or a bathtub in an inn or a public bath, is called a so-called (salmon powder) to maintain its water quality.
It is necessary to sterilize by adding an aqueous solution of highly-polished powder) or sodium hypochlorite (NaCIO).

However, conventionally, this work is manually performed by an employee at a pool or a bathhouse, and the aqueous solution of calcination or sodium hypochlorite has an irritating property, so that it is thrown in particularly during business hours. In that case, there is a problem that a great deal of labor is required to perform the processing, such as having to perform the work with great care.

Therefore, the applicant of the present invention invented a water treatment apparatus for introducing the water to be treated stored in each of the above-mentioned water tanks to the electrolytic cell and sterilizing it by an electrochemical reaction. In the water treatment device according to the present invention, the water to be treated is supplied to the electrolytic bath having the electrodes, and an electrochemical reaction (so-called electrolysis) is performed on the water to be treated. Due to the applied electrochemical reaction, chlorine gas,
Hypochlorous acid (HCIO), hypochlorite ions, etc. are generated, and these are dissolved in the water to be treated, whereby the water to be treated is sterilized.

The applicant of the present application has previously proposed a water treatment apparatus as disclosed in Japanese Patent Laid-Open No. 2001-170638 as a water treatment apparatus for sterilizing the water to be treated in the water tank by an electrochemical reaction using the electrolytic cell. . In this water treatment device, the NACL solution is introduced into the electrolytic cell from the NACL tank in which the NACL solution is stored, and the concentration of NACL dissolved in the water to be treated is increased to accelerate the electrolysis reaction.

[0006]

Generally, when salt water is electrolyzed to generate hypochlorous acid, it is more efficient to electrolyze a salt solution having a high concentration. However, as in the above configuration, if the NACL solution is added to the water to be treated to promote the electrolysis reaction to increase the salt concentration in the electrolyzer, it is not electrolyzed and is returned to the water tank without being reacted. Since the salt content of the water increases, the salt concentration of the water to be treated in the water tank increases. If the salt concentration in the aquarium rises, the user may complain that the water is salty, and there is concern about the problem of corrosion of piping materials due to the salt content.Therefore, make-up water in the aquarium to dilute the salt concentration of the aquarium. It was necessary to improve the water quality.

However, since the NACL solution is exhausted, it must be replenished, and since clean water is used as the replenishing water, it is economically disadvantageous in the maintenance of the water tank. .

The present invention has been made by paying attention to this point, and an object of the present invention is to improve water quality and reduce the amount of supplementary water and the amount of supplemental salt used for accelerating the electrolysis reaction. It is intended to provide a treatment device and a water treatment method.

[0009]

[Means for Solving the Problems and Effects of the Invention] The invention according to claim 1 is a water tank for storing water to be treated, and an electrolyte solution containing chlorine ions is added to the water to be treated introduced from the water tank. Electrolyzer to sterilize by electrochemical reaction,
In a water treatment device having a water treatment route that introduces the water to be treated from an aquarium into the electrolytic bath, and circulates the water back to the aquarium after sterilization, a concentrating device for concentrating and separating soluble substances contained in the water to be treated. A water treatment device comprising:

According to the second aspect of the present invention, a water tank for storing water to be treated, an electrolysis cell for conducting electrolysis by energizing an electrode set consisting of at least two electrode plates, and chlorine in the electrolysis cell A sterilizing solution having a sterilizing effect is produced by electrolyzing the electrolyte by energizing the electrode set in a state of being filled with an electrolyte solution containing ions and having an action of promoting an electrochemical reaction. A water treatment apparatus comprising a supply path for supplying a liquid to the water tank at any time, and a concentrator for concentrating and separating a soluble substance contained in the water to be treated.

The invention according to claim 3 is the invention according to claim 1 or 2.
The water treatment apparatus according to the item (1), further comprising an introduction path for supplying the concentrated liquid separated by the concentrator to the electrolytic cell.

According to a fourth aspect of the present invention, in the water treatment apparatus according to the third aspect, the storage tank for temporarily storing the concentrated liquid separated by the concentrating device and the treated water in the electrolytic cell are It is a water treatment device characterized by comprising a treated water supply channel for supplying to a storage tank.

The invention according to claim 5 is the same as claims 1 to 4.
2. The water treatment apparatus according to any one of 1 to 3, wherein the concentrator is an apparatus having a function of concentrating and separating a salt content dissolved in the water to be treated.

The invention described in claim 6 is from claim 1 to claim 5.
5. The water treatment device according to any one of 1 to 3, wherein the concentrator is provided with a reverse osmosis membrane.

According to a seventh aspect of the present invention, there is provided an electrolysis tank for sterilizing the water to be treated introduced from the water tank by an electrochemical reaction, the water to be treated is introduced from the water tank to the electrolysis tank, and the water tank is sterilized. In the water treatment method of sterilizing the water to be treated by providing a water treatment path for reflux to the treated water, a concentration device for concentrating and separating soluble substances containing salt dissolved in the water to be treated is provided, and the water is separated by the concentration device. In the water treatment method, a concentrated solution containing salt is supplied to the electrolytic cell and electrolyzed in the electrolytic cell to sterilize the concentrated solution.

According to the first to seventh aspects of the invention, in the conventional electrolytic solution (salt content) supplied to the electrolytic cell, the treated water containing a large amount of salt that has passed through the electrolytic cell without being electrolyzed, Although there is a possibility that the salt concentration in the water tank may be high, since the salt content is removed by the concentrating device, an increase in the salt concentration in the water tank can be suppressed.

In particular, according to the third aspect of the invention, the concentrated water separated and concentrated from the water to be treated by the concentrating device contains high-concentration salt and concentrated soluble dirt components. By electrolyzing the concentrated solution containing a large amount of salt in the tank, the electrolysis reaction is promoted and sterilization of the water to be treated is effectively performed. Moreover, since the high-concentration salt content supplied to the electrolyzer is a concentration of the salt content originally contained in the water to be treated, it is possible to efficiently perform electrolysis without adding new salt content. At the same time, the salt concentration of the water to be treated in the water tank as a whole does not increase, which makes it economically advantageous because it does not require makeup water.

According to the fourth aspect of the present invention, the concentrated liquid containing a large amount of salt is stored in the storage tank and diluted with the water to be treated introduced from the water supply path for the water to be treated. This allows
The concentration of the concentrated solution is adjusted so that the salt concentration is the most efficient for electrolysis in the electrolytic cell.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a simplified view showing a structure in which a water treatment device 1 according to an embodiment of the present invention is incorporated in a large water tank 2 such as a pool or a bath tub.

As shown in the figure, the water tank 2 has a circulation pump 2
2, a main circulation path 20 for constantly circulating a large amount of water to be treated in the direction shown by the double solid line arrow in the figure is installed.

Reference numeral 21 is a filter for sand filtration, and 23 is a heat exchanger. The water treatment route 10 of the water treatment device 1 is branched from a branch point J1 of the main circulation route 20 between the filter 21 and the heat exchanger 23, as shown by the solid line arrow in the figure, and a plurality of electrodes are provided. After passing through a gas-liquid separation tank 13 which also incorporates an electrode set E1 made of a plate and a filter 12 for removing fine bubbles, and which also functions as an electrolytic cell, at the confluence point J2 on the downstream side of the branch point J1, the main circulation is performed again. It is connected to join the path 20.

On the way from the branch point J1 of the water treatment path 10 to the gas-liquid separation tank 13, the opening / closing valve B1, the adjusting valve B2 for adjusting the flow rate, the branching point J3 to the desalting path 40, the adjusting valve. B3, flow meter S1, solenoid valve B4, conductivity sensor 1
1. Residual chlorine sensor 26, branch point J to treated water supply channel
4. Confluence point J with the supply path of electrolyte solution containing chlorine ions
5 and a check valve B10 are arranged. Further, at the position between the regulating valve B2 and the regulating valve B3 among the above, the branch point J3
A desalting route 40 is connected to the water treatment route 10 at a confluence point J6 on the downstream side of the gas-liquid separation tank 13 via a circulation pump P3 and a concentrator 30 and a post-pump P4.

One end of an introducing passage 41 for guiding the concentrated liquid separated by the concentrating device 30 to the gas-liquid separation tank 13 is connected to the concentrating device 30 provided in the desalting passage 40, and the other end thereof is connected. Is connected to the storage tank 42.

In the concentrating device 30, the reverse osmosis membrane 31 inside which the water to be treated introduced by the desalination route 40 is provided
It is concentrated and separated by. Specifically, the water to be treated pressurized by the circulation pump P3 is the reverse osmosis membrane 3 of the concentrator 30.
Sent to 1. In this reverse osmosis membrane 31, permeated water in which various organic substances and ions dissolved in the water to be treated are removed to improve the water quality, and conversely, a concentrated liquid in which various organic substances and ions are concentrated to reduce the water quality Is separated into Then, the permeated water that has permeated the reverse osmosis membrane 31 directly joins the water treatment path 10 at the confluence point J6 through the desalination path 40 and is returned to the water tank 2. On the other hand, the concentrated liquid that has not permeated the reverse osmosis membrane 31 is guided to the introduction path 41 and sent to the storage tank 42.

At the branch points J4 and J5 of the water treatment passage 10, there are disposed a treated water feed passage 43 and an electrolyte solution feed passage 44, respectively, and the treated water feed passage 43 and the electrolyte solution feed passage 44 are arranged respectively. , Are both connected to the storage tank 42.
Further, an electromagnetic valve B6 is arranged on the treated water supply passage 43, and a pump P2 for supplying the electrolyte solution in the storage tank 42 to the gas-liquid separation tank 13 is arranged on the electrolyte solution supply passage 44.

The storage tank 42 stores a concentrated liquid containing a high-concentration salt content separated and concentrated from the water to be treated by the concentrating device 30 and a dirty component of the water to be treated. The electrolyte solution such as salt in the storage tank 42 is measured by the conductivity sensor 11 so as to be stirred and diluted with the water to be treated supplied from the water to be treated 43 to be an electrolyte solution having a desired concentration. It is controlled based on the ion concentration of the water to be treated, the current value flowing through the electrode set E1, and the like.

On the way from the gas-liquid separation tank 13 to the confluence J2 of the water treatment path 10, the treated water is sent out from the gas-liquid separation tank 13 in order, so that the treated water is treated in the water treatment path 10. A delivery pump P1, a flow meter S4, a regulating valve B7, a check valve B8 for preventing backflow, and a regulating valve B9 for regulating the flow rate are arranged.

The gas-liquid separation tank 13 is composed of a box-shaped tank body 13 which is the main body of the gas-liquid separation tank 13 and a lid 13e which forms an upper surface of the gas-liquid separation tank 13 by closing the upper opening of the tank body 13. Among them, the inside of the tank body 13 is divided into three gas-liquid separation regions 1 by the filter 12 for removing fine bubbles described above.
It is divided into 3a, 13b, and 13c.

And these three gas-liquid separation areas 13a, 1
In the gas-liquid separation region 13a on the most upstream side of 3b and 13c, the electrode set E1 composed of a plurality of electrode plates described above is arranged, and the gas-liquid separation tank 13 is a diaphragm free for electrochemical reaction. It is also used as an electrolyzer. An outlet 13d for the water to be treated is formed at the bottom of the gas-liquid separation region 13c on the most downstream side. From the outlet 13d, on the pipe forming the latter half of the water treatment route 10, The delivery pump P1 is disposed.

In the position directly above the gas-liquid separation region 13c of the lid 13e, a suction for forcibly discharging the gas originating from the fine bubbles separated from the water to be treated by the filter 12 out of the tank. An exhaust pipe 34 having a mold blower F1 disposed in the middle is connected, and on the other hand, at a position directly above the gas-liquid separation region 13a, the blower F1 replaces the gas discharged to the outside of the tank into the tank. An air inlet (not shown) for introducing air is formed, and a pipe forming the first half of the water treatment route 10 is connected.

A water level sensor W1 as a water level detecting means for controlling the water level in the gas-liquid separation area 13a within a certain range is arranged at a substantially central position of the lid 13e. FIG. 2 is a block diagram showing an electrical configuration of the water treatment device shown in FIG. The water treatment device is provided with a control unit 45 composed of a microcomputer or the like. The outputs of the residual chlorine sensor 26, the conductivity sensor 11, and the water level sensor W1 are given to the control unit 45. A memory and a timer are provided in the control unit.

The control unit 45 controls the operation of the water treatment device 1 in accordance with a predetermined operation program in accordance with the given detection signals. Specifically, a control signal is applied to the driver 46, and the driver 46 controls the energization output (energization current) to the electrode assembly E1, energization time and the like based on the applied signal, and each valve B1 The opening / closing and adjustment of B11 to B11, the drive control of the pumps P1 to P4, 22 and the energization control of the blower motor F1 are performed.

Using the water treatment device 1 having the above-mentioned parts,
In order to sterilize the water to be treated in the water tank 2, first, the circulation pump 22 is operated so that a large amount of the water to be treated is constantly supplied in the main circulation path 20 as indicated by a double solid arrow in FIG. While circulating, the delivery pumps P1 to P4 are operated and the valves B1 to B11 are opened.

Then, a part of the water to be treated circulating in the main circulation passage 20 flows into the water treatment passage 10,
First, the flow rate is adjusted through the adjusting valve B2, and then the flow rate is measured by the flow meter S1 and the residual chlorine concentration is measured by the residual chlorine sensor 26. The adjustment of the flow rate by the adjusting valve B2 is adjusted according to the flow rate measured by the flow meter S1.

Next, the water to be treated is sent to the gas-liquid separation area 13a on the most upstream side of the gas-liquid separation tank 13 and the residual chlorine concentration measured by the residual chlorine sensor 26 in the area 13a is measured. The electrode set E1 is energized on the basis of the above conditions to be sterilized by an electrochemical reaction, and then is transmitted through the filter 12 and sequentially sent to the gas-liquid separation region 13c on the downstream side. The fine bubbles are removed by 12 and the appearance becomes clear and clear.

Further, at this time, the gas originating from the fine bubbles removed from the water to be treated rides on the flow of air flowing from the air inlet (not shown) generated by operating the blower F1 and is vaporized. The exhaust pipe 34 is removed from the liquid separation tank 13.
Is discharged to the outside through the.

On the other hand, the water to be treated which has been subjected to the sterilization treatment and in which the fine bubbles have been removed is operated by the delivery pump P1.
From the gas-liquid separation area 13c on the most downstream side, it is sent out of the tank through a delivery port 13d provided at the bottom of the area, and passes through a flow meter S4, a regulating valve B7, a check valve B8, and a regulating valve B9, and joins. It is returned to the main circulation path 20 at J2 and is returned to the water tank 2.

A portion of the water to be treated which has flowed into the water treatment route 10 flows into the desalination route 40 at the branch point J3, is pressurized by the circulation pump P3, and is then sent to the concentrator 30. The reverse osmosis membrane 31 of the concentrator 30 separates permeated water and concentrated water.

The permeated water that has permeated the reverse osmosis membrane 31 is returned to the water treatment route 10 at the confluence J6 by the circulation pump P4 and is circulated to the water tank 2. On the other hand, the concentrated liquid that has not permeated the reverse osmosis membrane 31 is sent to the storage tank 42 through the adjustment valve B11.

Impurities (for example, various salts such as sodium chloride derived from sweat, various bacteria, various viruses, etc.) brought in by aquarium users such as swimmers and bathers are contained in this concentrated liquid at a high concentration. Exists in. Therefore, the concentrated liquid stored in the storage tank 42 is diluted by mixing the water to be treated as needed.

That is, since the electrolyte such as sodium chloride exists at a high concentration in the concentrated liquid stored in the storage tank 42 as described above, the ion concentration measured by the conductivity sensor 11 and the electrode assembly are measured. Mixing with the water to be treated supplied from the water supply passage 43 to be treated so that the electrolytic solution concentration is such that the electrolysis treatment in the gas-liquid separation tank 13 is efficiently performed based on the current value flowing in E1. And diluted. The concentrated solution diluted to a predetermined concentration in the storage tank 42 passes through the electrolyte solution supply path 44 and the water treatment path 1 at the branch point J5.
After being sent to 0 and mixed with the water to be treated, it is supplied into the gas-liquid separation tank 13.

In the gas-liquid separation tank 13, the electrolyte contained in the concentrated liquid supplied from the storage tank 42 allows the electrochemical reaction to be efficiently performed, and the concentrated liquid supplied from the storage tank 42 is not covered by the electrolyte. Since the dirt components separated from the treated water are concentrated and present, the active oxygen and hypochlorous acid generated by electrolysis are efficiently used, and the oxidation and sterilizing action of the active oxygen and the sterilizing action allow the concentrated liquid to be mixed. Treated water is effectively sterilized.

In particular, active oxygen generated by electrolysis has a very short life. Therefore, unless it reacts with dirt components immediately after it is generated by electrolysis, it has the property of losing sterilization efficiency. With the configuration in which a high-concentration soil component is directly supplied to the inside, more effective sterilization can be performed in one tank.

FIG. 3 is a diagram showing the structure of a water treatment device according to another embodiment of the present invention. The main difference of the water treatment device 1 from the previous example is that the water treatment route 10 including the gas-liquid separation tank 13 is replaced by a batch treatment electrolytic tank 14.

The batch processing electrolytic cell 14 has a built-in electrode set E2 composed of a plurality of electrode plates. The batch processing electrolytic cell 14 contains chloride ions such as salt and undergoes an electrochemical reaction. A sterilizing solution having a sterilizing action is produced by energizing the electrode assembly E2 to electrolyze the electrolyte solution for a certain period of time in a state of being filled with an aqueous solution of an electrolyte having a accelerating action, and the produced sterilizing solution is stored in a storage tank. It is designed to be stored in 14d. And the storage tank 14d
A supply path 35 for connecting the sterilizing liquid therein to the main circulation path 20 at any time is connected.

More specifically, an opening / closing valve B1 is branched from the main circulation path 20 at a branch point J1, a branch point J7 to a desalination path, a branch point J8 to a treated water feed path, and a regulating valve B11. After passing through the electromagnetic valve B12, the confluence J9 of the supply path of the electrolyte solution containing chlorine ions, the batch processing electrolytic cell 14, and the delivery pump P9, the check valve B13 and the adjusting valve B14 are passed through again. The supply path 35 is formed so as to join the main circulation path 20.

Further, the solenoid valve B1 in the supply path 35
Branch point J located between 2 and the electrolytic bath 14 for batch processing
A supply path 51 from a salt water tank 50 described later is connected to 9 via a metering pump P6. In the storage tank,
A treated water feed channel 52 branched from the supply path 35 is connected at a branch point J8 located upstream of the solenoid valve B11, and a constant water level is always maintained by a solenoid valve B16 and a water level sensor W3 via a regulating valve B15. Water to be treated is supplied.

Further, after branching at a branch point J7 and passing through a circulation pump P7 and a concentrating device 30 through a circulation pump P8 and a check valve B17, a position between the on-off valve B1 and the regulating valve B11 is passed. A demineralization route 40 that joins the main circulation route 20 is connected at a junction J11.

An introducing passage 53 connecting the concentrating device 30 and the salt water tank 50 is connected to the concentrating device 30 provided in the desalting route 40, and the concentrated liquid separated and concentrated by the concentrating device 30 is Salt water tank 50 through the introduction path 53
Sent to. On the other hand, the permeated water that has passed through the concentrating device 30 passes through the latter half of the pipe of the desalination path 40, joins the main circulation path 20 by the circulation pump P8, and then is returned to the water tank 2.

The batch processing electrolytic cell 14 comprises a box-shaped case main body 14a, which is the main body of the batch processing electrolytic cell 14, and a lid 14b which constitutes the upper surface of the batch processing electrolytic cell 14 by closing the upper opening of the case main body 14a. It is configured. A rectangular resin box serving as the electrolytic cell 14c is provided in a separate section in the case main body, and the space other than the electrolytic cell 14c in the case main body stores the sterilizing liquid generated in the electrolytic cell 14c. It is also used as the storage tank 14d.

An electrode set E2 consisting of a plurality of electrode plates is arranged in the electrolytic cell 14c in a state of no diaphragm, and the concentrated solution from the salt water tank 50 and the treated water from the water treatment route 10 are arranged. The pipe of the first half portion of the supply path 35 for supplying the generated electrolyte solution into the electrolytic cell 14c penetrates the lid 14b and is inserted into the electrolytic cell 14c.

On the most downstream side of the case body 14a which also serves as the storage tank 14d, a pipe in the latter half of the sterilizing liquid supply path 35 is arranged with its suction port 35a located at the bottom of the storage tank 14d. , Pump P for delivery on the way
9 is connected.

The lid 14b located immediately above the most downstream side of the body case 14a has a suction blower for forcibly discharging the gas generated by electrolysis in the electrolytic cell 14c to the outside of the body case 14a. Exhaust pipe 3 with F2 in the middle
3 is connected.

A water level sensor W2 as a water level detecting means for controlling the water level of the sterilizing liquid in the storage tank 14d within a certain range is arranged at a substantially central position of the lid 14b.
When the metering pump P6 and the solenoid valve B12 are driven to supply the electrolyte solution to the electrolytic cell 14c, the supplied electrolytic solution is electrolyzed to be composed of hypochlorous acid or hypochlorite ion. A sterile liquid is produced. The produced sterilizing solution fills up the electrolytic cell 14c with electrolytic cell 1
It overflows from the upper part of 4c and is stored in a storage tank 14d arranged around the electrolytic cell 14c.

The water level sensor W2 is provided in the storage tank 14d.
By detecting the water level of the sterilizing liquid of No. 1 and adjusting the driving of the metering pump P6 and the opening / closing of the electromagnetic valve B12, the electrolytic cell 14c
The amount of the sterilizing solution in the storage tank 14d is adjusted by controlling the inflow amount of the electrolytic solution flowing into the storage tank 14d, thereby controlling the sterilizing solution overflowing from the electrolytic cell 14c. The water level is controlled to a predetermined water level.

The operation of the water treatment apparatus equipped with the above-mentioned electrolytic bath 14 for batch treatment is as follows. The water in the water tank 2 is pumped out by the circulation pump 22, the organic matter is removed by the filter 21, and then the water that flows back to the water tank 2 through the heat exchanger 23 at the branch point J1 flows into the supply path 35. Divided into water.

Then, a part of the water flowing into the supply path 35 flows into the desalination path 40 at the branch point J7, is pressurized by the circulation pump P7, and is sent to the concentrator 30. Concentrator 3
At 0, the reverse osmosis membrane 31 provided inside separates into permeated water and concentrated water.

The permeated water that has permeated the reverse osmosis membrane 31 is returned to the main circulation path 20 at the confluence J11 by the circulation pump P8 and is circulated to the water tank 2. On the other hand, the concentrated liquid that has not permeated the reverse osmosis membrane 31 is sent to the salt water tank 50 through the adjusting valve B18.

Since the concentrated solution sent to the salt water tank 50 contains concentrated dirt components and salt dissolved in the water to be treated as described above, the concentrated solution stored in the salt water tank 50 is necessary. Accordingly, it is diluted by mixing the water to be treated.

That is, since the concentrated liquid stored in the salt water tank 50 contains a high concentration of an electrolyte such as sodium chloride, a constant amount pump P6 based on the value of the current flowing through the electrode assembly E2.
The concentration of the electrolyte solution supplied to the electrolytic cell 14c is optimal so that the electrolytic solution concentration in the electrolytic cell 14c is efficiently adjusted by adjusting the flow rate and the opening / closing of the electromagnetic valve B12. Adjustments are made to achieve the values.

That is, a part of the water to be treated which has flowed into the supply path 35 from the branch point J1 is sent to the salt water tank 50 through the adjusting valve B11 and the solenoid valve B12, and the electrolyte previously charged in the salt water tank 50 is removed. The concentrated solution containing is diluted to produce the electrolyte solution having the predetermined concentration, which is fed into the supply path 35 at the branch point J9 by the action of the pump P6, and then the electrolytic cell 14c.
Is supplied to. The electrolyte solution sent to the electrolytic cell 14c is
After the electrode assembly E2 is energized in the electrolytic bath 14c to form a high-concentration sterilizing liquid, the sterilizing liquid is sequentially sent to the storage tank 14d.

At this time, since the contaminants separated from the water to be treated are concentrated and exist in the concentrated liquid supplied from the storage tank, the active oxygen and hypochlorous acid generated by the electrolysis are effective. Sterilized.

Then, when the storage tank 14d reaches a predetermined water level, the supply of the electrolyte solution is stopped and the process stands by. The sterilizing liquid stored in the storage tank 14d is operated by the delivery pump P9 as necessary based on the measurement result of the residual chlorine concentration in the water tank 2 measured by the residual chlorine sensor (not shown). At any time, it is delivered to the outside of the batch processing electrolytic cell 14 through the suction port 35a, returned to the main circulation path 20 at the confluence J2, and recirculated to the water tank 2.

In this embodiment, the reverse osmosis membrane is used as the concentrating device, but the present invention is not limited to this. For example, a concentrating device such as a distilling device is used to concentrate pure water, salt and contaminants. By separating it into a liquid, the same effect as in the above embodiment can be obtained.

An ion exchange resin may be used as the concentrating device. As the ion exchange resin is used, it gradually deteriorates due to ions in the water to be treated and various contaminants,
Although the ion exchange capacity is weakened, the ion exchange resin is regenerated by separately contacting the ion exchange resin with hydrochloric acid and an aqueous sodium hydroxide solution, and the solution of hydrochloric acid and sodium hydroxide used for regeneration is an aqueous sodium chloride solution. Therefore, it may be supplied to the electrolytic cell and used for the electrolysis reaction.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

[Brief description of drawings]

FIG. 1 is a simplified view of a water treatment device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of the water treatment device of FIG.

FIG. 3 is a schematic view showing a water treatment device according to another embodiment of the present invention.

[Explanation of symbols]

1 Water treatment device 2 aquarium 13 Gas-liquid separation tank (electrolysis tank) 30 concentrator

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshihiro Inamoto             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F-term (reference) 4D006 GA03 KA72 KB30 MB02 PA02                       PB07 PB24 PB70 PC51 PC55                       PC56                 4D061 DA07 DB01 DB09 EA02 EB01                       EB02 EB04 EB14 EB19 EB20                       EB37 EB39 ED12 FA09 GA02                       GA04 GA06 GC02

Claims (7)

[Claims] 1. A water tank for storing water to be treated, an electrolytic tank for adding an electrolyte solution containing chloride ions to the water to be treated introduced from the water tank and sterilizing by an electrochemical reaction, and the water tank for treating water to be treated. In a water treatment apparatus having a water treatment route that is introduced into the electrolysis tank from the above, and is returned to the water tank after the sterilization treatment, the water treatment apparatus includes a concentrator that concentrates and separates a soluble substance contained in the water to be treated. Water treatment equipment. 2. A water tank for storing water to be treated, and at least 2.
An electrolytic cell for conducting electrolysis by energizing an electrode set consisting of a sheet of electrode plates, and the electrolytic cell containing chlorine ions in the electrolytic cell and filled with an electrolytic solution having a function of promoting an electrochemical reaction, A sterilizing solution having a sterilizing action is produced by energizing the set to electrolyze the electrolyte, and a sterilizing solution having a supply path for supplying the produced sterilizing solution to the water tank at any time, and solubility in the water to be treated are provided. A water treatment device comprising a concentrating device for concentrating and separating substances. 3. The water treatment apparatus according to claim 1 or 2, further comprising an introduction passage for supplying the concentrated liquid separated by the concentrator to the electrolytic cell. 4. The water treatment apparatus according to claim 3, wherein a storage tank for temporarily storing the concentrated liquid separated by the concentrating apparatus, and water to be treated in the electrolytic tank is supplied to the storage tank. A water treatment device comprising a water supply channel. 5. The water treatment apparatus according to any one of claims 1 to 4, wherein the concentrating device has a function of concentrating and separating a salt content dissolved in the water to be treated. . 6. The water treatment apparatus according to claim 1, wherein the concentrating device includes a reverse osmosis membrane. 7. A water treatment route is provided, wherein an electrolysis tank for sterilizing the water to be treated introduced from the water tank by an electrochemical reaction is provided, and the water to be treated is introduced from the water tank to the electrolysis tank and is returned to the water tank after the sterilization treatment. In a water treatment method for sterilizing water to be treated, a concentration device for concentrating and separating a soluble substance containing a salt dissolved in the water to be treated is provided, and a concentrated liquid containing a salt separated by the concentration device is provided. A water treatment method, characterized in that the concentrated solution is sterilized by being supplied to the electrolytic bath and electrolyzed in the electrolytic bath.