JPH07328635A - Water treatment and water treating apparatus - Google Patents

Abstract

PURPOSE:To feed only the required quantity of treating water without discharging water and to perform continuous operation without a polarization phenomenon occurring in electrodes by performing electrolysis to discharge only the treating water from one chamber and to discharge gas from the other chamber. CONSTITUTION:At least one or more diaphragms 17, 19 for dividing an electrolyzer into plural chambers 14, 16 arranged side by side between a pair of electrodes 12a, 12b, and a DC power source for applying voltage to a pair of the electrodes 12a, 12b are provided. A water feeding pipe is connected to the 1st chamber 14 housing the 1st electrode 12a of a pair of the electrodes 12a, 12b to feed raw water. Next, the raw water in the electrolyzer is electrolyzed, and a discharge pipe is connected to the 1st chamber 14, and the treating water is discharged from the 1st chamber 14 only. In the 2nd chamber 16 housing the other electrode 12b of a pair of the electrodes 12a, 12b, gas diffusing parts 13a-13c are installed, and gas is discharged from the 2nd chamber 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment method and a water treatment apparatus for electrolyzing water without waste water to obtain a treatment liquid such as sterilized water, acidic ionized water or alkaline ionized water. is there.

[0002]

2. Description of the Related Art Recently, there has been a remarkable movement to review one's health. For example, many health magazines have been published, and each of them reports various methods and efforts for promoting health and maintaining physical condition one after another. It is not uncommon for such magazines and oral reports to trigger a slight boom. Although these may end in a temporary boom, those with a solid backing are often well accepted by the people. One of these is alkaline ionized water. It has been said for a long time that using alkaline ionized water for drinking water is good for health, but during this time, an alkaline ionized water purifier was developed to constantly provide alkaline ionized water at home, and it has become popular. This is one in which water is treated by electrolysis and, of two electrodes, a cathode and an anode, provided in an electrolytic cell, alkaline ionized water generated around the cathode is used for drinking. Moreover, in addition to alkaline ionized water, acidic ionized water generated at the anode at the same time is useful for sterilizing burns and the like, and can be used as sterilizing water for modern diseases such as atopy. As described above, the alkaline ionized water conditioner is widely used as a simple water treatment device at home.

Therefore, an alkaline ionized water conditioner will be described as an example of a conventional water treatment apparatus. Other water treatment devices also require electrolysis and are basically the same as the alkaline ionized water conditioner. FIG. 8 is a schematic structural diagram of a conventional alkaline ionized water device. 41 is this alkaline ionized water conditioner, 42a and 42b are electrodes, 43 is a diaphragm, and 44 is an inlet valve. Further, 45 is a communication valve, 46 is a drain valve, 47 is an electrolytic cell, 48 is an anode chamber, 49 is a cathode chamber, and 50 is a discharge port. Raw water such as tap water passes through the inlet valve 44 and the electrolyzer 4
Guided to 7. Then, here, the treatment liquid is divided into the anode chamber 48 and the cathode chamber 49, which are electrolysis chambers, and the treatment liquid generated in the cathode chamber 49 is discharged as alkaline ionized water from the discharge port. Further, the treatment liquid generated in the anode chamber 48 becomes acidic ionized water and is discharged from the drain valve 46. The electrodes 42a and 42b are titanium plates plated with platinum. The diaphragm 43 is for separating the alkaline ionized water and the acidic ionized water so that the two treatment liquids produced with care are not mixed with each other so as not to be mixed and neutralized.
The communication valve 45 is for discharging the remaining water in the electrolytic cell 47 when the electrolysis is stopped.
The drain valve 46 is closed so that the residual water existing inside the electrolytic cell 47 can be discharged.

[0004]

However, in this prior art, the raw water introduced through the inlet valve 44 is divided into a cathode chamber 49 and an anode chamber 48 at a certain ratio, usually about 50%. When a DC power source is applied between the electrodes, the ion is discharged as alkaline ionized water and acidic ionized water from the discharge port 50 and the drain valve 46, but the purpose of the user of the alkaline ionized water device is alkaline ionization as drinking water. If water is used, the acidic ionized water that is produced at the same time is a useful substance that has the effect of sterilizing and conditioning the skin, but it was simply discarded as discarded water. Of course, it may be possible to store this and use it, but this is difficult for the following reasons. That is, hypochlorous acid, which is the main component of the sterilizing power of acidic ionized water, reacts with other substances to form bound chlorine while it is accumulated water,
After about 24 hours, it dissociates into chlorine ions. Since the combined chlorine and chlorine ions have no sterilizing power, it is practically difficult to use the acidic ionized water as a reservoir. As described above, when using alkaline ionized water, there is a problem that acidic ionized water generated at the same time must be discarded and used as water. This is a problem in that the acidic ionized water generated by applying electricity is discarded as it is, and there are many problems from the viewpoint of energy saving. This situation is the same when using acidic ionized water, and in the past it was a waste of valuable alkaline ionized water to be discarded.

In the conventional example, if the drain valve 46 is closed so as not to drain water, the container becomes a closed system and O ₂ gas or H ₂ gas generated from the electrode surface adheres to the electrode surface. Occurred and the electrolysis stopped there. As a matter of course, it was impossible to continuously obtain a desired treatment liquid.

Therefore, the present invention is to solve these conventional problems, and a treatment liquid can be obtained without waste water, and a polarization phenomenon occurs without wasting power. It is an object of the present invention to provide a water treatment method and a water treatment device that do not have such a problem.

Another object of the present invention is to provide a sterilizing / cleaning apparatus capable of obtaining sterilizing water without discarding water, and an alkali ion water purifier for obtaining alkaline ionic water without discarding water. To do.

[0008]

The water treatment method of the present invention comprises:
At least one or more diaphragms are arranged in parallel between a pair of electrodes to divide the inside of the tank into a plurality of chambers, and the raw water is supplied to the first chamber of the pair of electrodes which accommodates the first electrode. While performing, the raw water in the tank is electrolyzed, and the treatment liquid is discharged only from the first chamber,
Gas is discharged from the second chamber containing the second electrode.

Further, the water treatment apparatus of the present invention comprises at least one or more diaphragms arranged in parallel between a pair of electrodes to divide the inside of the tank into a plurality of chambers, and a DC power source for applying a voltage to the pair of electrodes. ,
The feed water pipe is connected to the first chamber accommodating the first electrode of the pair of electrodes to supply the raw water, the raw water in the tank is electrolyzed, and the discharge pipe is connected to the first chamber to connect the first water to the first chamber. The treatment liquid is discharged from only one chamber, and a gas permeable portion is provided in the second chamber accommodating the other electrode of the pair of electrodes.

The gas permeable portion is preferably a gas permeable film. Two or more diaphragms are juxtaposed, and it is suitable that one or more intermediate chambers are formed in addition to the first chamber and the second chamber.

Further, it is preferable to provide polarity switching means for switching the polarity of the power source applied to the pair of electrodes.

It is preferable to store the sparingly soluble salt in the second chamber or the intermediate chamber. Further, the sterilizing / cleaning device of the present invention is installed in parallel between a pair of electrodes to divide the tank into two or more chambers.
Equipped with one or more diaphragms and a DC power supply for applying a pair of electrodes, a water supply pipe is connected to the first chamber of the pair of electrodes that houses the anode to supply halogen ion water to generate halogen ion water. While being decomposed, a discharge pipe was connected to the first chamber to discharge treated water containing hypohalous acid and hypohalous acid ions generated at the anode from only the first chamber to discharge a pair of electrodes. A gas permeable portion is provided in the second chamber containing the cathode.

In the sterilizing / cleaning apparatus of the present invention, the water supply pipe is connected to the first bath water circulation passage for guiding the bath water from the bath, and the discharge pipe is connected to the second bath water circulation passage for returning the treated water to the bath again. Is appropriate.

The alkaline ionized water conditioner of the present invention comprises:
The water supply pipe is connected to the first chamber that houses the cathode of the pair of electrodes to supply the raw water to electrolyze the raw water.
A discharge pipe is connected to the chamber to discharge the alkaline ionized water generated at the cathode only from the first chamber, and a gas permeable portion is provided in the second chamber of the pair of electrodes containing the anode. Characterize.

It is suitable to connect the water purifier and the water supply pipe to supply the purified water to the first chamber.

[0016]

In the water treatment method of the present invention, the treatment liquid is electrolyzed to discharge the treatment liquid only from the first chamber and the gas is discharged from the second chamber, so that only the necessary treatment liquid is obtained and the waste water is discarded. Does not occur, and the electrode of the second chamber does not cause the polarization phenomenon.

In the water treatment apparatus of the present invention, the treatment liquid is discharged only from the first chamber and the gas permeable portion is provided in the second chamber. Therefore, the polarization phenomenon can be suppressed with a simple structure to eliminate the waste water. Can be processed.

Since the gas permeable portion is the gas permeable film, the generated gas can be treated with a very simple structure.

Since two or more diaphragms are arranged side by side to form the intermediate chamber, it is possible to supply a treatment liquid of stable water quality for a long period of time.

Since the polarity switching means for switching the polarity of the power source is provided, the alkaline ionized water and the acidic ionized water can be appropriately selected and supplied as needed.

Since the sparingly soluble salt is contained in the second chamber or the intermediate chamber, it is possible to enhance the efficiency of electrolysis due to a small amount of dissolved ions, and to provide a mineral water producing function.

In the sterilizing and cleaning apparatus of the present invention, a water supply pipe is connected to the first chamber to supply halogen ion water for electrolysis, and hypohalous acid and hypohalous acid are supplied only from the first chamber. Since the treated water containing ions is discharged and the gas permeable portion is provided in the second chamber, it is possible to supply a treatment liquid containing hypohalous acid and hypohalous acid ions and having a strong sterilizing power without discarding water. .

Since the bath water is guided from the bath, treated with treated water having a strong sterilizing power and returned to the bath again, a bath system which is hygienic and does not have sliminess can be obtained.

Further, the alkaline ionized water conditioner of the present invention comprises:
Since the water supply pipe for supplying raw water is connected to the first chamber,
It is possible to provide alkaline ionized water without waste water.

Since the water purifier is connected, the purified alkaline ionized water can be provided without being discarded.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the water treatment method and water treatment apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a sterilization / cleaning device which is a water treatment device according to an embodiment of the present invention. FIG. 2 is a detailed structural diagram of a sterilizing and washing device which is a water treatment device according to an embodiment of the present invention.
The sterilizing / cleaning device is a sterilizing device such as a hand-washing / disinfecting device for preventing nosocomial infections in hospitals and the like, which have recently become a social problem. Of course, it is not limited to this application, and any application may be used as long as it is sterilized and washed. Reference numeral 1 denotes a sterilization cleaning device. Raw water such as tap water is guided to a raw water tank 9 from a raw water valve 10. Further, a concentrated saline solution is prepared in the saline solution tank 8 and guided to the raw water tank 9 through the valve 8a to be mixed with the raw water. This is for improving the efficiency of electrolysis. This concentrated saline solution may be an aqueous solution of concentrated potassium chloride or concentrated calcium chloride.
In addition to these, salts of halogens such as fluorine and bromine other than chlorine may be used, and for example, a concentrated aqueous solution of sodium fluoride or sodium bromide may be mixed. The raw water after mixing is introduced into the sterilization / cleaning apparatus 1 by the pump 6 via the valves 4 and 5a. Note that tap water used as raw water contains hypochlorite ions, so the saline water tank 8 may be used in some cases.
Can be omitted. The treatment liquid is electrolyzed in the sterilization / cleaning apparatus 1 and is discharged from the valve 10a by the pump 7.

The sterilization / cleaning device 1 and its water treatment method will be described in detail with reference to FIG. In this embodiment, the sterilization / cleaning apparatus 1 is a box-shaped tank. However, the shape is not limited to this. The tank of the sterilization / cleaning apparatus 1 is partitioned into several spaces by diaphragms 17 and 19 and electrodes 12a and 12b. That is, raw water is stored in the tank of the sterilization / cleaning apparatus 1, and a pair of electrodes 12a and 12b are inserted into the tank so that the raw water can be electrolyzed and the inside of the tank is partitioned.
Next, two diaphragms 17 and 19 are provided between the electrodes 12a and 12b.
The sheets are arranged side by side and the inside of the tank is divided into three chambers. Electrode 12
Of the a and 12b, the chamber containing the first electrode 12a corresponds to the above-mentioned first chamber, and the second electrode 12a
The chamber accommodating b corresponds to the above-mentioned second chamber. In this embodiment, the first chamber is divided into two so to speak by inserting the electrode 12a as described above.
By inserting 2b, the second chamber is divided into two, so to speak. The space partitioned by the electrode 12a and the diaphragm 17 is the electrolysis chamber 1
4 and the space partitioned by the electrode 12b and the diaphragm 19 is the electrolysis chamber 16. The space partitioned by the diaphragm 17 and the diaphragm 19 is the intermediate chamber 15. The electrodes 12a and 12b are electrode plates obtained by plating platinum on a titanium plate. 11a, 11b, 1
1c and 11d are partition walls, which are two electrolysis chambers 14 and 1
In order to partition the above-mentioned 5 spaces including the 6 and the intermediate chamber 15 and the remaining 2 spaces, the electrodes 12a and 12b and the diaphragms 17 and 19 are extended as they are.
The diaphragms 17 and 19 are made by incorporating a nonwoven fabric such as polyester into a porous membrane made of polyethylene chloride or the like as a substrate, and have a large fluid resistance but can pass water, gas and ions. In addition to the porous structure, a structure such as a fiber aggregate or a net may be used. Also the partition wall 11
Each of a, 11b, 11c, and 11d is made of a material that does not allow water, gas, and ions to pass through, for example, ABS resin. This is to prevent the water contained in the two electrolysis chambers 14 and 16 and the intermediate chamber 15 from mixing with each other. The electrode plates 12a and 12b are connected to a DC power source for electrolysis. The DC power supply is only required to be able to continuously apply a DC voltage, and it may be a rectified AC power supply or a device that varies if the polarity is not changed. In short, it suffices if this allows electrolysis. And this partition wall 11a, 1
If the liquid level described below is controlled at the upper position of the tank where 1b, 11c, and 11d exist, the entire surface of the electrodes 12a and 12b can be used for electrolysis, so that the efficiency of electrolysis can be improved. it can. By the way, this electrolysis chamber 14,
Gas permeable membranes 13a, 13c and 13b, which are gas permeable portions, are provided on the upper part of 16 and the intermediate chamber 15, respectively. This is O ₂ , H ₂ gas and C generated during electrolysis.
A halogen gas or the like such as l ₂ gas is allowed to pass therethrough and discharged to the outside. Gas permeable membrane 13a,
13b and 13c are made of a material such as polytetrafluoroethylene and formed into a fiber aggregate, a porous or net film. As a result, the gas generated in the electrolysis chamber 16 can be discharged and water cannot pass through, so there is no risk of water leakage. Further, although the gas permeable membranes 13a, 13b and 13c are used as the gas permeable portion in the present embodiment, for example, a mechanism such as an exhaust valve that is opened and closed by detecting gas or responding to gas pressure is used. It may be used as a transparent part. Since the gas permeating portions are provided in the electrolysis chambers 14 and 16 and the intermediate chamber 15, the non-water-passing electrolysis chamber 16 in which the water supply pipe and the discharge pipe are connected and the raw water is not supplied and the treatment liquid is not taken out
Can be a completely open system. Water flow side electrolysis chamber 1
At 4, the gas is also discharged to the outside through the discharge port 18. Since no gas is accumulated, no polarization phenomenon occurs in the electrode 12b, so that the amount of treatment liquid in the sterilization / cleaning apparatus 1 can be increased. 18 is a discharge port provided in the discharge pipe,
It is provided so as to project on the upper side surface of the electrolysis chamber 14. Raw water is introduced into the electrolysis chamber 14 from the bottom of the sterilization / cleaning apparatus 1 through the valve 4 provided in the water supply pipe, and the valve 5a
It is also introduced into the electrolysis chamber 16 and the intermediate chamber 15 through. At this time, the valve 5b is closed. Liquid level detectors 2 and 3 are provided on the upper portions of the electrolysis chamber 14 and the electrolysis chamber 16. The liquid level detector 2 detects when the processing liquid is discharged from the discharge port 18 and the liquid level is lowered, and controls a controller (not shown) to raise the opening of the valve 4. If the water level does not change without using the treatment liquid, the liquid level detector 2 detects that the liquid level is at the upper limit position, and the controller controls to close the valve 5a. On the other hand, the liquid level detector 3 controls only to fill the electrolytic chamber 16 with raw water. That is, the controller closes the valve 5a when the liquid level reaches a desired position by the detection of the liquid level detector 3, and opens the valve 5a when the water level becomes low. As described above, such liquid level control is performed by the partition walls 11a, 11b, 11c,
At the position of 11d, the entire surfaces of the electrodes 12a and 12b can come into contact with raw water, and the entire surfaces of the electrodes 12a and 12b can be used for electrolysis. This can improve the efficiency of electrolysis. 5b is a valve that can appropriately discharge the residual liquid from the intermediate chamber 15 and the electrolytic chamber 16 after electrolysis, for example. It should be noted that the valve 5b can be used to escape the water level when the water level fluctuates due to control or the like at the time of introduction of raw water and the water level overshoots. Not discarding water does not include such a case, and is substantially judged.

In the present embodiment, the sterilization / cleaning apparatus 1 is divided into three chambers by the two diaphragms 17 and 19, and this is further divided by a pair of electrodes 12a and 12b, so to speak. It may be divided into two rooms. In this case, the intermediate chamber 15 is not formed.
On the contrary, it is also possible to divide into four or more chambers by three or more diaphragms. In this case, the number of intermediate chambers 15 will increase. These effects will be described later. Also, the two outer chambers partitioned by the diaphragm may not be completely partitioned by the electrodes 12a and 12b, and a small electrode may be simply inserted, or the electrodes 12a and 12b may be rod-shaped electrodes instead of electrode plates. It may be an electrode plate having many holes. At this time, the two outer chambers accommodating the electrodes 12a and 12b correspond to the first chamber and the second chamber, which correspond to the electrolytic chambers 14 and 16 of this embodiment.

By the way, the electrode 12a is used for electrolysis.
A DC power supply is applied to the electrodes 12b. Since the present embodiment is the sterilization / cleaning apparatus 1 for performing sterilization, the electrode 12a is the anode and the electrode 1 is for extracting the acidic ionized water as the treatment liquid.
2b is connected so as to be a cathode. Electrolysis is an oxidation and reduction reaction on the surfaces of the electrodes 12a and 12b,
The oxidation reaction proceeds at the anode and the reduction reaction proceeds at the cathode. The reaction at the anode is as shown in Chemical formula 1.

[0030]

[Chemical 1]

[0031] (Formula 1) is a reaction that emits electrons, generates the emitted electrons as hypochlorite ions ClO ^over the next (Formula 2) reacts with chlorine ions Cl ^over the raw water To do. Although the case of this embodiment is the chloride ion Cl ^{chromatography,} a quite similar in fluoride ions F ^over or bromine ion Br ^{chromatography} halogen ions such, hypohalite ions are generated as well. Below as this example will be described of chlorine ions Cl ^{chromatography,} but omitted the detailed description of its general similar in halogen ion general.

[0032]

[Chemical 2]

By the way, the chemical formula of water is H ₂ O, but it is ionized as shown in the following (Chemical formula 3).

[0034]

[Chemical 3]

Hydroxide ions OH ^- ionized according to (Chemical Formula 3) generate oxygen gas at the anode as shown in (Chemical Formula 1) and at the same time emit electrons to be consumed. Along with this, the hydrogen ion H ⁺ concentration increases, and the pH of the treatment liquid becomes acidic.

Moreover, around the anode, hypochlorite ion ClO ^- is produced according to (Chemical formula 2), and this hypochlorite ion ClO ^- is further hydrogen ion H ^{+ as} shown in the following (Chemical formula 4). By combining with, hypochlorous acid is also produced. The same applies to halogens other than chlorine, and hypohalous acid is generated around the anode.

[0037]

[Chemical 4]

[0038] Thus hypochlorite ions ClO ^over the hypochlorous acid generated at the anode and HClO are all strong oxidizing power, it is very strong germicidal substances. Only two oxidizing power than there is hypochlorite ion ClO ^over a relatively better hypochlorite HClO is among the substances, sterilizing power is high, hypochlorous acid HClO is often generated if possible It is desirable to do so. The same applies to other hypohalous acid ions and hypohalous acid. That is, both hypohalous acid ion and hypohalous acid are substances having a strong oxidizing power and a strong bactericidal power, such a substance having a strong bactericidal power is generated in the anode, and the acidic treatment liquid is taken out from the discharge port 18. It will be.

By the way, the reaction at the cathode is a reduction reaction as shown in (Chemical formula 5), and hydrogen gas H ₂ is generated.

[0040]

[Chemical 5]

When the pH of the anode is around 3.5,
HClO is decomposed to generate chlorine gas Cl ₂ , or chlorine gas Cl ⁻ is directly oxidized to generate chlorine gas Cl ₂ as shown in (Chemical Formula 6). Generally, halogen gas will be generated.

[0042]

[Chemical 6]

In this embodiment, these generated gases are
Gas permeable membrane 13 made of porous polytetrachloroethylene
It is released to the outside via a, 13b, and 13c. However, as can be seen from FIG. 8, the conventional water treatment apparatus does not have such gas permeable membranes 13a, 13b, 13c, and therefore, when the communication valve 45 and the discharge valve 46 are closed, the tank is sealed. It becomes a space and the generated gas is the electrode 42a
It adheres to the surface of 42b and impedes the flow of electric current, and the electrolysis stops soon. This is well known as the electrolysis polarization phenomenon. On the other hand, in the present embodiment, the gas permeable membranes 13a, 13b as the gas permeable portion,
Since 13c is provided, the polarization phenomenon can be avoided and continuous operation becomes possible. Further, in the present embodiment, since the valve 5b is closed to perform the water treatment, a large amount of the treatment liquid which is not used during the electrolysis is not discarded unlike the conventional water treatment apparatus. The valve 5b is used for appropriately discharging the residual liquid in the electrolysis chamber 16 after completion of electrolysis and for escaping fluctuations in water level.

FIG. 5 is an experimental result chart showing the relationship between the pH and residual chlorine of the treatment liquid of the sterilizing and washing apparatus which is the water treatment apparatus in one embodiment of the present invention and the usage time. The usage time is the time during which electrolysis is continued and the processing liquid is discharged. As the residual chlorine concentration ^, the total concentration of the hypochlorous acid HClO and the hypochlorite ion ClO- is measured. In addition to the pH of the treatment liquid, FIG. 5 also shows the pH of the raw water. The conditions of electrolysis were: voltage 30 V, current 5.0 A, flow rate 0.5 liter / min, chlorine ion Cl ^- concentration of raw water 500 ppm, electrode distance 20 mm. The diaphragm was made by incorporating a polyester non-woven fabric using a porous chlorinated polyester membrane as a substrate, and the gas permeable membrane was made of a porous polytetrafluoroethylene membrane. At this time, the pH of the raw water is around 7.0, but the pH of the treatment liquid is about 3.6, which is almost constant.
Further, the residual chlorine concentration is maintained at about 10.2 ppm and has a stable pH. As described above, in this embodiment, sterilized water having a stable pH can be supplied without waste water.

By the way, the sterilizing and cleaning apparatus 1 of this embodiment can supply sterilizing water having a stable pH, and at the same time,
The pH can be controlled by increasing or decreasing the applied voltage or current. For example, in order to use sterilized water as a strong acid to lower the pH, the pH is lowered by increasing the voltage, and the pH is also lowered by increasing the current. Further, by adjusting the valve 4 to reduce the flow rate, the pH can be lowered under the same electrolysis conditions. On the other hand, if the operation is reversed, p
H can be raised. By controlling the voltage, current and flow rate in this way, a treatment liquid having a desired pH can be obtained. More stable p by controlling with a pH sensor
The treatment liquid of H can be obtained.

The sterilization / cleaning apparatus of this embodiment is used as a general sterilization apparatus, and in addition to the bath water sterilization apparatus 31 described in FIG. 4, a pool sterilization apparatus, an acid bath for bed sore prevention of bedridden elderly, and COD concentration. Various applications such as expensive wastewater treatment equipment are possible. It is suitable to use these after controlling the pH to about 5 to 6.

By the way, in this embodiment, the diaphragm 17, 1
Although it is divided into three chambers by using 9, it may be divided into two chambers by one diaphragm as described above. However, in this case, the p
There is a possibility that H may fluctuate though it is slight. However, if the operation is performed for a short period of time, this will not be a problem, and if a pH sensor or the like is provided as necessary to control the pH, the problem is practically solved. On the other hand, when it is divided into three or more chambers by two or more diaphragms, the p is very stable.
A treatment liquid of H can be obtained. It is considered that this is because, as the number of diaphragms increases, the fluid resistance through the diaphragms increases, and the possibility that the electrolyzed treatment liquid is mixed further decreases. The number of diaphragms is selected in consideration of the type and thickness of diaphragms, the use of the sterilization / cleaning device, and the cost. It is not necessary to increase the number of diaphragms until pH stabilization is less necessary.

Next, an alkaline ionized water conditioner which is another embodiment of the present invention will be described. FIG. 3 is a detailed structural diagram of an alkaline ionized water device which is a water treatment device according to another embodiment of the present invention. Reference numeral 21 is an alkaline ionized water conditioner.
Reference numeral 24 denotes a raw water valve provided in a water supply pipe for introducing tap water or the like, which is electrolyzed while water is being passed through the electrolysis chamber 29a and discharges alkaline ionized water as a treatment liquid from a discharge port 30 of the discharge pipe. To be done. The valve 25 is for filling the intermediate chamber 29b and the electrolysis chamber 29c with raw water, and is controlled by detecting the internal water level state by the liquid level detector 30a provided in the electrolysis chamber 29c. That is, the valve 25 is closed when the intermediate chamber 29b and the electrolytic chamber 29a are full, and the valve 25 is opened when the water level is lowered. At this time, the valve 26 remains closed. Electrode plates 22a and 22b are provided in the electrolytic chamber 29a and the electrolytic chamber 29c. DC power is applied to the electrode plates 22a and 22b. It is applied so that the electrode plate 22a serves as an anode and the electrode plate 22b serves as a cathode.
23a and 23b are electrolysis chambers 29a and 29c and intermediate chamber 29b.
It is a partition. The number of diaphragms may be one or more. 27
Is O ₂ gas or C generated from the electrode plate 22a during electrolysis.
It is a gas permeable film for permeating a halogen gas such as l ₂ gas together with the diaphragms 23a and 23b. Other means may be adopted as the gas permeable portion. Since the discharge port 30 is attached to the upper part of the electrolytic chamber 29a, the generated H ₂
The gas is discharged from this discharge port 30. Therefore electrolysis chamber 2
No gas permeable membrane is provided on 9a. Of course, a gas permeable film may be provided. Diaphragm 23a, 2
3b, the material of the gas permeable membrane 27 is the same as that of the embodiment of the sterilization cleaning device. 28 is a sparingly soluble salt for increasing the efficiency of electrolysis, and a small amount of dissolved ions accelerates electrolysis. The sparingly soluble salt is used in the electrolytic chamber 29 in this embodiment.
Although it is housed in c, it may be housed in the intermediate chamber 29b. The sparingly soluble salt is, for example, calcium glycerophosphate. This calcium glycerophosphate increases calcium ions in the treatment liquid. This means that a mineral component is added to the alkaline ionized water, which gives the alkaline ionized water a character as mineral water. That is, accommodating a sparingly soluble salt causes the alkaline ionized water purifier to function as a mineral water freshener. The valve 26 is for discharging the polar liquid accumulated in the electrolytic chamber 29c after the electrolysis and the liquid in the intermediate chamber 29b. Although not shown in FIG. 3, it is appropriate that the raw water is led to the alkaline ionized water purifier 21 through the water supply pipe after passing through the water purifier containing the activated carbon, the hollow fiber membrane and the like. It is desirable that this water purifier connected to the alkaline ionized water purifier 21 be integrated. At this time, the purified water purified by the water purifier is supplied to the raw water valves 24 and 25. The treatment liquid discharged from the alkaline ionized water purifier by passing through the water purifier becomes preferable as drinking water.

In the case of this embodiment, the raw water or purified water (through the water purifier) introduced into the electrolytic chambers 29a, 29c and the intermediate chamber 29b of the alkaline ionized water conditioner 21 through the raw water valve 24 and the valve 25 from the water supply pipe. In the case), it is electrolyzed to generate H ₂ gas in the electrolytic chamber 29a as shown in Chemical formula 5. That is, since the hydrogen ions H ⁺ ionized according to (Chemical Formula 3) are taken up by the cathode and gasified and consumed as shown in (Chemical Formula 5), the hydrogen ion H ⁺ concentration gradually decreases and the treatment liquid is gradually reduced. The pH of the solution will rise to show alkaline. By discharging this alkaline processing liquid from the discharge port 30, it can be used as alkaline ionized water for drinking water or the like.

In the present embodiment, the alkaline ionized water conditioner 21 which constantly discharges the alkaline ionized water has been described. However, the alkaline ionized water is normally used but the acidic ionized water is sometimes required. There is a way. To this end, the polarity switching means for switching the polarity of the DC power source applied to the pair of electrodes 22a, 22b is provided with electrodes 22a, 2
It is desirable to provide it between 2b and the DC power supply. The polarity switching means may be composed of a manually operated changeover switch, a toggle switch and a relay, etc., and may be any circuit as long as the connection state can be reversed.

FIG. 6 is an experimental result chart showing the relationship between the pH of the treatment liquid of an alkaline ionized water device which is a water treatment apparatus in another embodiment of the present invention and the operating time. In this case as well, the usage time refers to the time during which electrolysis is performed and the processing liquid is discharged. Figure 6
In addition to the pH of the treatment liquid, the pH of the raw water is also measured and described in. The conditions of electrolysis are voltage 30V, current 0.4A,
Flow rate 0.5 l / min, chlorine raw water ion Cl ^over concentration 20
ppm, distance between electrodes is 10 mm. The materials of the diaphragm and the gas permeable membrane are the same as in the case of FIG. The pH of the raw water is approximately 7.0 for 10 hours, but the pH of the treatment liquid is stable at 1
It is 0.0. As an alkaline ionized water device, alkaline ionized water having a very stable pH can be supplied.
In the prior art, the acidic ionized water generated in addition to the alkaline ionized water had to be discharged as discarded water, but in this embodiment, no discarded water is generated. That is, it also contributes to energy saving. It is also possible to freely control the pH by controlling the voltage, current and flow rate.

Next, as another embodiment of the present invention, a bath water sterilizing apparatus attached to sterilize bath water will be described. FIG. 4 is an overall schematic view of a bath water sterilizer which is a water treatment device in another embodiment of the present invention. 31 is a bath water sterilizer, 34 is a valve for supplying hot water, and 35 is a valve for supplying tap water. Reference numeral 36 denotes a bathtub, and 33 is a circulation pump that sucks bath water from the bath 36 and sends it to the bath water sterilization processing device 37. The bath water discharged from the bath water disinfection processing device 37 is returned to the bath 36 again. That is, the water supply pipe of the bath water disinfection treatment device 37 is connected to the first bath water circulation path that includes the circulation pump 33 that guides the bath water from the bath bath 36, and the treated water treated by the bath water disinfection treatment device 37 is again supplied to the bath bath 36. The discharge pipe of the bath water sterilization processing device 37 is connected to the second bath water circulation path which is returned to. The detailed structure of the bath water disinfection processing device 37 is basically the same as the structure shown in FIG. 2, and therefore detailed description is omitted here. Bath 36
From the captured bath water enters the electrolysis chamber on the anode side of the bathtub water sterilization apparatus 37, to generate hypochlorite ion and hypochlorous acid from chlorine ions Cl ^{chromatography} in tap water with lowering the pH by electrolysis It is returned to the bathtub 36.
The acidic ionized water containing hypochlorous acid ions and hypochlorous acid has a strong sterilizing action, whereby the bath water is disinfected and sterilized. Although not described herein, when not sufficiently strong enough chlorine ions Cl chlorine ions Cl ^over the ^over the tap water may be provided a similar salt water tank 8 and the description of FIG. In addition to sodium chloride, this concentrated saline solution may be a concentrated aqueous solution of potassium chloride or calcium chloride that does not affect the human body.

FIG. 7 is an experimental result chart showing the relationship between the number of bacteria in the treatment liquid of a bath water sterilizer, which is a water treatment apparatus in another embodiment of the present invention, and the use time. For comparison, the experimental results of the number of bacteria and the use time of the conventional example when an ozonizer is provided instead of the bath water sterilization apparatus 37 of the present example for sterilization are also shown. Experimental conditions are 5 baths daily
The data is taken because a person uses it twice. When the bath water decreased, hot water and water were replenished through the valves 34 and 35. Residual chlorine concentration in this example (hypochlorite ion Cl
Total density of O ^over and hypochlorite) is 0.5 ppm.
According to the water quality standard, the ozone concentration of the conventional example must be 50 ppb or less, so the experiment is conducted at 50 ppb. A standard agar medium was used as the agar medium for measuring the number of bacteria.
The culture temperature was kept at 37 ° C. for 48 hours. According to FIG. 7, in the case of this example, the number of bacteria was about 10 at around 25 colonies / ml.
Water quality standard for bacterial counts 10
0 colonies / ml are fully satisfied. However, in the case of ozone sterilization of the conventional example, the water quality is far exceeding the standard of 500 colonies / ml from the beginning of the experiment, and the number of bacteria gradually increases with the passage of days and finally reaches 800 colonies / ml. Reached Further, when the bath water was used, a slimy sensation appeared in the conventional example, but in the case of this example, the slimy sensation did not occur.

As described above, the bath water disinfecting apparatus of this embodiment has an excellent disinfecting power, and the number of bacteria does not increase even if it is continuously operated. Therefore, an optimum disinfecting apparatus is provided as a bath water disinfecting apparatus for a 24-hour bath system. be able to. In addition, since alkaline ionized water that is simultaneously formed during electrolysis is not discharged as waste water unlike conventional water treatment devices, it provides an energy-saving bath water disinfection device that does not damage the environment even as a 24-hour bath system. can do.

[0055]

In the water treatment method of the present invention, the electrolysis is performed to discharge the treatment liquid only from the first chamber and the gas is discharged from the second chamber. Can be supplied without doing. Therefore, energy can be saved and the electrode can be continuously operated without causing a polarization phenomenon.

The water treatment apparatus of the present invention can suppress the polarization phenomenon with a simple structure and perform water treatment without waste water.

The generated gas can be effectively discharged with a simple structure of the gas permeable film, and the polarization phenomenon can be surely prevented.

Since two or more diaphragms are provided and the intermediate chamber is formed, it is possible to supply a treatment liquid of stable water quality for a long period of time.

Since the polarity switching means is provided, alkaline ionized water and acidic ionized water can be appropriately selected and supplied as needed.

Since the sparingly soluble salt is contained, it is possible to enhance the efficiency of electrolysis due to a slight amount of dissolved ions, and also to provide the function of a mineral water fresh water generator.

Further, the sterilizing / cleaning apparatus of the present invention can supply a treatment liquid containing hypohalous acid and hypohalous acid ions, which has a strong sterilizing power, without discarding water.

Since the bath water is guided from the bath, treated with treated water having a strong sterilizing power, and returned to the bath again, a bath system which is hygienic and does not have sliminess can be obtained.

Furthermore, the alkaline ionized water conditioner of the present invention is
It is possible to provide alkaline ionized water without discarding water, and since the water purifier is connected, purified alkaline ionized water can be provided without discarding water.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a sterilization / cleaning device which is a water treatment device according to an embodiment of the present invention.

FIG. 2 is a detailed structural diagram of a sterilization / cleaning device which is a water treatment device according to an embodiment of the present invention.

FIG. 3 is a detailed structural diagram of an alkaline ionized water device which is a water treatment device according to another embodiment of the present invention.

FIG. 4 is an overall schematic view of a bath water disinfection device which is a water treatment device according to another embodiment of the present invention.

FIG. 5 is an experimental result chart showing a relationship between pH and residual chlorine of a treatment liquid of a sterilizing and washing device which is a water treatment device in one embodiment of the present invention, and usage time.

FIG. 6 is an experimental result chart showing the relationship between the pH of a treatment liquid of an alkaline ionized water device which is a water treatment device in another embodiment of the present invention and the use time.

FIG. 7 is an experimental result chart showing the relationship between the number of bacteria in the treatment liquid of the bath water sterilizer, which is a water treatment device, and the time of use in another embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a conventional alkaline ionized water device.

[Explanation of symbols]

1 Sterilization / cleaning device 2, 3, 30a Liquid level detector 4, 5a, 5b, 8a, 10a, 25, 26, 34, 3
5 Valves 6 and 7 Pump 8 Salt water tank 9 Raw water tank 10 and 24 Raw water valve 11a, 11b, 11c, 11c Partition wall 12a, 12b, 22a, 22b, 42a, 42b Electrode 13a, 13b, 13c, 27 Gas permeable membrane 14 , 16, 29a, 29c Electrolysis chamber 15, 29b Intermediate chamber 18, 30, 50 Discharge port 21 Alkaline ion water conditioner 17, 19, 23a, 23b, 43 Diaphragm 28 Insoluble salt 31 Bath water sterilizer 33 Circulation pump 36 Bath 37 Bath water sterilizer 48 Anode chamber 49 Cathode chamber

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location C02F 1/50 520 BL L 531 P 540 B 550 D 560 FE 1/66 510 C G 522 A 530 L P 540 E D 1/68 510 B 520 D G 530 B 540 E D

Claims (10)

[Claims] 1. A pair of electrodes is provided in a tank for containing raw water,
At least one or more diaphragms are arranged in parallel between the pair of electrodes to partition the inside of the tank into a plurality of chambers, and raw water is stored in the first chamber containing the first electrode of the pair of electrodes. The raw water in the tank is electrolyzed while supplying the water, the processing liquid is discharged only from the first chamber, and the gas is discharged from the second chamber containing the second electrode. Water treatment method. 2. A tank for containing raw water, a pair of electrodes provided in the tank, and at least one sheet arranged in parallel between the pair of electrodes to divide the tank into a plurality of chambers. The diaphragm of
A direct current power supply for applying to the pair of electrodes is provided, and a water supply pipe is connected to a first chamber accommodating the first electrode of the pair of electrodes to supply the raw water, and the raw water in the tank is electrically supplied. The gas permeation part is disassembled and a discharge pipe is connected to the first chamber to discharge the processing liquid from only the first chamber, and the second chamber accommodating the other electrode of the pair of electrodes. A water treatment device provided with. 3. The water treatment device according to claim 2, wherein the gas permeable portion is a gas permeable film. 4. The two or more diaphragms are juxtaposed to each other, and one or more intermediate chambers are formed in addition to the first chamber and the second chamber. The described water treatment device. 5. The water treatment apparatus according to claim 2, further comprising polarity switching means for switching the polarity of a power source applied to the pair of electrodes. 6. The water treatment apparatus according to claim 2, wherein a hardly soluble salt is contained in the second chamber or the intermediate chamber. 7. A pair of electrodes provided in a tank, one or more diaphragms arranged in parallel between the pair of electrodes to divide the tank into two or more chambers, and the pair of electrodes. A DC power source for applying to the electrodes of the pair of electrodes, a water supply pipe is connected to the first chamber accommodating the anode of the pair of electrodes to supply halogen ion water to electrolyze the halogen ion water, and A discharge pipe was connected to the chamber to discharge treated water containing hypohalous acid and hypohalite ions generated at the anode from only the first chamber, and the cathode of the pair of electrodes was housed. A sterilizing / cleaning apparatus having a gas permeable portion in the second chamber. 8. The water supply pipe is connected to a first bath water circulation passage for guiding bath water from the bath, and the discharge pipe is connected to a second bath water circulation passage for returning the treated water to the bath again. The sterilizing and cleaning device according to claim 7. 9. A pair of electrodes provided in a tank, one or more diaphragms arranged in parallel between the pair of electrodes to divide the tank into two or more chambers, and the pair of electrodes. Of the pair of electrodes, a water supply pipe is connected to the first chamber accommodating the cathode to supply raw water to electrolyze the raw water and discharge the raw water to the first chamber. A tube is connected to discharge alkaline ionized water generated at the cathode only from the first chamber, and a gas permeable portion is provided in the second chamber of the pair of electrodes accommodating the anode. Alkaline ion water conditioner. 10. The alkaline ionized water purifier according to claim 9, wherein the water supply pipe is connected to a water purifier to supply purified water to the first chamber.