JP2904009B2 - Water treatment method and water treatment device - Google Patents

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 obtaining a treatment liquid such as sterilized water, acidic ionic water or alkaline ionic water by electrolyzing water without discarding water. is there.

[0002]

2. Description of the Related Art Recently, there has been a remarkable movement to review one's own health. For example, a number of health magazines and the like have been published, and each report one after another about various methods and approaches for promoting health or maintaining physical condition. It is not uncommon for such magazines and word of mouth to trigger a small boom. These can end with a temporary boom, but those with a solid ground are often accepted by the public. One such thing is alkaline ionized water. It has long been said that the use of alkaline ionized water for drinking water is good for health, but in the meantime, an alkaline ionized water dispenser has been developed to provide alkaline ionized water at home at all times, and has gained popularity. In this method, water is treated by electrolysis, and alkali ion water generated around the cathode among the two electrodes of a cathode and an anode provided in an electrolytic cell is provided for drinking. Moreover, in addition to the alkaline ionized water, the acidic ionized water simultaneously generated at the anode is useful for sterilizing burns and the like, and can be used as sterilizing water for atopic diseases such as atopic diseases. As described above, the alkali ion water conditioner is frequently used as a simple domestic water treatment device.

Accordingly, an alkali ion water conditioner will be described as an example of a conventional water treatment device. Other water treatment devices also require electrolysis and are not fundamentally different from alkali ion water conditioners. FIG. 8 is a schematic structural view of a conventional alkali ion water conditioner. 41 is this alkali ion water conditioner, 42a and 42b are electrodes, 43 is a diaphragm, and 44 is an inlet valve. 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 passes through the electrolytic cell 4
It is led to 7. Then, the processing liquid is divided into an anode chamber 48 and a cathode chamber 49, which are electrolytic chambers, and the processing liquid generated in the cathode chamber 49 is discharged from the discharge port as alkaline ionized water. In addition, the processing liquid generated in the anode chamber 48 becomes acidic ion water and is discharged from the drain valve 46. The electrodes 42a and 42b are obtained by plating platinum on a titanium plate. The diaphragm 43 is for separating the alkaline ionized water and the acidic ionized water, so that the two processing liquids generated with great care are mixed together so that they are not 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 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 split into a cathode chamber 49 and an anode chamber 48 at a certain ratio, usually approximately a half ratio. When a DC power supply is applied between the two electrodes, the ionized water is discharged from the discharge port 50 and the drain valve 46 as alkaline ionized water and acidic ionized water. If water is used, the acidic ion water produced at the same time is simply discarded as waste water, although it is a useful substance having a disinfecting and skin conditioning effect. Of course, it is conceivable to store this and use it, but this is difficult for the following reasons. In other words, hypochlorous acid, which is the main component of the sterilizing power of acidic ionized water, reacts with other substances to become bound chlorine while being in the pool water,
After about 24 hours, they dissociate into chlorine ions. Since the combined chlorine and chloride ions have no bactericidal activity, it is practically difficult to use the acidic ionized water as a reservoir. As described above, there has been a problem that when alkaline ionized water is used, acidic ionized water generated at the same time must be discarded. In this method, the acidic ion water generated by applying electric power is discarded as it is, which is problematic from the viewpoint of energy saving. This situation is the same when using acidic ionized water, and conventionally, wasteful alkaline ionized water was discarded and wasted.

In the conventional example, when the drain valve 46 is closed so as not to drain water, the container becomes a closed system, and O ₂ gas and H ₂ gas generated from the electrode surface adhere to the electrode surface, a so-called polarization phenomenon. And electrolysis stopped there. Naturally, it has not been possible to obtain a desired processing solution continuously.

Accordingly, the present invention has been made to solve these conventional problems, and a processing solution 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 require any treatment.

Another object of the present invention is to provide a sterilizing and washing apparatus capable of obtaining sterilized water without discarding water, and an alkaline ionizer for obtaining alkali ionized water without discarding water. I do.

[0008]

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

Further, the water treatment apparatus of the present invention includes at least one or more diaphragms which are juxtaposed between a pair of electrodes and partition the inside of the tank into a plurality of chambers, and a DC power supply applied to the pair of electrodes. ,
A water supply pipe is connected to a first chamber containing the first electrode of the pair of electrodes to supply raw water, and the raw water in the tank is electrolyzed, and a discharge pipe is connected to the first chamber to form a first pipe. A processing liquid is discharged from only one chamber, and a gas permeable portion is provided in a second chamber containing the other electrode of the pair of electrodes.

[0010] The gas permeable portion is desirably a gas permeable membrane. Suitably, two or more diaphragms are juxtaposed, and one or more intermediate chambers are formed in addition to the first chamber and the second chamber.

It is preferable to provide a polarity switching means for switching the polarity of the power supply applied to the pair of electrodes.

[0012] It is preferable to store the hardly soluble salt in the second chamber or the intermediate chamber. In addition, the sterilizing and cleaning apparatus of the present invention is arranged between a pair of electrodes to partition the tank into two or more chambers.
A water supply pipe is connected to a first chamber of the pair of electrodes, which accommodates an anode, and a halogen ion water is supplied by supplying a halogen ion water to the first chamber. While being decomposed, a discharge pipe is connected to the first chamber, and treated water containing hypohalous acid and hypohalous acid ions generated at the anode is discharged only from the first chamber, and the discharge water is discharged from the pair of electrodes. The second chamber containing the cathode is provided with a gas permeable portion.

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

[0014] The alkali ion water conditioner of the present invention comprises:
A water supply pipe is connected to a first chamber containing a cathode of the pair of electrodes to supply raw water and to electrolyze the raw water,
The discharge pipe is connected to the first chamber, the alkaline ionized water generated at the cathode is discharged only from the first chamber, and the gas permeable portion is provided in the second chamber containing the anode among the pair of electrodes. Features.

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

[0016]

According to the water treatment method of the present invention, since the treatment liquid is discharged only from the first chamber by electrolysis and the gas is discharged from the second chamber, only the necessary treatment liquid is obtained and the waste water is discarded. Does not occur, and no polarization phenomenon occurs in the electrodes of the second chamber.

In the water treatment apparatus of the present invention, the treatment liquid is discharged only from the first chamber and the gas permeation section is provided in the second chamber. Can be processed.

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

Since two or more diaphragms are arranged side by side 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 for switching the polarity of the power supply is provided, alkaline ionized water and acidic ionized water can be appropriately selected and supplied as needed.

Since the hardly soluble salt is contained in the second chamber or the intermediate chamber, the efficiency of electrolysis can be increased due to a small amount of dissolved ions, and a mineral water freshening function can be provided.

Further, in the sterilizing and cleaning apparatus of the present invention, a water supply pipe is connected to the first chamber to supply halogen ionized 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 second chamber is provided with a gas permeable portion, it is possible to supply a treatment liquid having a strong sterilizing power containing hypohalous acid and hypohalous acid ions without discarding water. .

Since the bathtub water is guided from the bathtub, treated with treated water having a strong sterilizing power and returned to the bathtub again, a bathtub system that is hygienic and free from slimming can be provided.

Further, the alkali ion water conditioner of the present invention comprises:
Because the water supply pipe that supplies raw water to the first room is connected,
Alkaline ionized water can be provided without waste water.

Since the water purifier is connected, 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 sterilizing and cleaning apparatus which is a water treatment apparatus according to one embodiment of the present invention. FIG. 2 is a detailed structural view of a sterilizing and cleaning apparatus which is a water treatment apparatus according to one embodiment of the present invention.
A sterilizing and washing apparatus is a sterilizing apparatus such as a hand washing and disinfecting apparatus for preventing hospital-acquired infection in hospitals and the like, which has recently become a social problem. Of course, the present invention is not limited to this use, and any use may be made as long as it can be sterilized and washed. Reference numeral 1 denotes a sterilizing and cleaning device. Raw water such as tap water is guided to a raw water tank 9 through a raw water valve 10. Also, a concentrated salt solution is prepared in a salt solution tank 8 and guided to a raw water tank 9 through a valve 8a to be mixed with raw water. This is to increase the efficiency of electrolysis. This concentrated salt solution may be an aqueous solution of concentrated potassium chloride or concentrated calcium chloride.
In addition, salts of halogens such as fluorine and bromine other than chlorine may be used. For example, a concentrated aqueous solution of sodium fluoride or sodium bromide may be mixed. The raw water after mixing is introduced into the sterilizing and washing apparatus 1 by the pump 6 via the valves 4 and 5a. Since tap water contains hypochlorite ions as raw water, the salt water tank 8 may be used in some cases.
Can be omitted. The solution is electrolyzed in the sterilizing and cleaning apparatus 1 and the processing liquid is discharged from the valve 10 a by the pump 7.

Referring to FIG. 2, the sterilizing and cleaning apparatus 1 and its water treatment method will be described in detail. In this embodiment, the sterilizing and cleaning device 1 is a box-shaped tank. However, the shape is not limited to this. The tank of the sterilizing and cleaning apparatus 1 is divided into several spaces by diaphragms 17 and 19 and by electrodes 12a and 12b. That is, although the raw water is stored in the tank of the sterilizing and washing apparatus 1, 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, 19 are provided between the electrodes 12a, 12b.
The tank is arranged side by side and divided into three chambers. Electrode 12
a and the chamber accommodating the first electrode 12a correspond to the first chamber described above, and the second electrode 12a
The room accommodating b corresponds to the above-mentioned second room. In this embodiment, as described above, the first chamber is divided into two by inserting the electrode 12a.
By inserting 2b, the second chamber is divided into two parts. The space separated by the electrode 12a and the diaphragm 17 is the electrolytic chamber 1
4, and a space partitioned by the electrode 12 b and the diaphragm 19 is the electrolytic 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
Numerals 1c and 11d denote partition walls, and two electrolysis chambers 14, 1
In order to partition the above five spaces including the remaining two spaces in addition to the space 6 and the intermediate chamber 15, they are provided as they are extending from the electrodes 12 a and 12 b and the diaphragms 17 and 19 as they are.
The diaphragms 17 and 19 are made by incorporating a nonwoven fabric such as polyester with a porous membrane made of polyethylene chloride or the like as a base, and have a high fluid resistance but allow water, gas and ions to pass therethrough. In addition to the porous structure, a structure such as a fiber aggregate or a net may be used. Partition wall 11
a, 11b, 11c and 11d are made of a material that does not allow passage of water, gas and ions, for example, ABS resin. This is to prevent water contained in the two electrolysis chambers 14 and 16 and the intermediate chamber 15 from being mixed. The electrode plates 12a and 12b are connected to a DC power supply for electrolysis. The DC power supply only needs to be capable of continuously applying a DC voltage. The DC power supply may be a rectified AC power supply, or may have a fluctuation if the polarity is not changed. In short, it suffices if this allows electrolysis. And this partition 11a, 1
If the liquid level described later is controlled at the upper position of the tank where 1b, 11c and 11d are present, 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 films 13a, 13c, and 13b, which are gas permeable portions, are provided on the upper part of the intermediate chamber 16 and the intermediate chamber 15, respectively. This is because O ₂ , H ₂ gas and C
This is to allow a halogen gas such as l ₂ gas to pass therethrough and to be discharged to the outside. Gas permeable membrane 13a,
Reference numerals 13b and 13c denote a fiber aggregate, a porous or net-like film made of a material such as polytetrafluoroethylene. As a result, gas generated in the electrolytic chamber 16 can be discharged and water does not pass, so there is no fear of water leakage. Further, in the present embodiment, the gas permeable portions 13a, 13b, and 13c are used as the gas permeable portions. It may be used as a transmission part. Since the gas permeable portions are provided in the electrolysis chambers 14 and 16 and the intermediate chamber 15, the non-water-flow-side electrolysis chamber 16 is connected to the water supply pipe and the discharge pipe to supply the raw water and remove the processing liquid.
Can be a completely open system. Electrolysis chamber 1 on the water flow side
At 4, the gas is discharged to the outside via the discharge port 18. Since gas does not accumulate, no polarization phenomenon occurs in the electrode 12b, and therefore, the amount of the processing liquid in the sterilizing and cleaning apparatus 1 can be increased. Reference numeral 18 denotes a discharge port provided in the discharge pipe,
It is provided so as to protrude from the upper side surface of the electrolytic chamber 14. Raw water is introduced into the electrolysis chamber 14 from the bottom of the sterilizing and cleaning apparatus 1 through a valve 4 provided in a water supply pipe, and a valve 5a is provided.
And into the electrolytic chamber 16 and the intermediate chamber 15. At this time, the valve 5b is closed. Liquid level detectors 2 and 3 are provided in the upper part 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 the controller (not shown) to increase the opening of the valve 4. If the water level does not change without using the processing liquid, the liquid level detector 2 detects that the liquid level is at the upper limit position, and the controller controls the valve 5a to close. 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,
If performed at the position 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. Thereby, the efficiency of electrolysis can be improved. Reference numeral 5b denotes a valve capable of appropriately discharging the remaining liquid from the intermediate chamber 15 and the electrolytic chamber 16 after the electrolysis. Note that the valve 5b can be used to escape when the water level fluctuates due to the control at the time of introducing the raw water and the water level overshoots. Not discarding water does not include such a case and is substantially determined.

In this embodiment, the germicidal washing device 1 is divided into three chambers by two diaphragms 17 and 19, which are further partitioned by a pair of electrodes 12a and 12b. It may be divided into two rooms. In this case, no intermediate chamber 15 is formed.
Conversely, it can be divided into four or more chambers by three or more diaphragms. In this case, the number of the intermediate chambers 15 increases. These effects will be described later. Further, the two outer chambers separated by the diaphragm may not be completely separated by the electrodes 12a and 12b, but may be simply inserted with a smaller electrode, or the electrodes 12a and 12b may be rod-shaped electrodes instead of electrode plates. Alternatively, an electrode plate having many holes may be used. At this time, the two outer chambers accommodating the electrodes 12a and 12b correspond to a first chamber and a second chamber, which correspond to the electrolysis chambers 14 and 16 of the present embodiment.

In order to perform electrolysis, the electrode 12a is used.
A DC power supply is applied to the electrode 12b. The present embodiment is a sterilizing and cleaning apparatus 1 for performing sterilization and disinfection.
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 follows.

[0030]

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[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 I 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]

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

[0034]

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The hydroxide ion OH ^over that ionized accordance (Formula 3) is consumed by emitting electrons simultaneously producing oxygen gas as an anode shown in (Formula 1). As a result, the concentration of hydrogen ions H ⁺ increases, and the pH of the processing solution becomes acidic.

[0036] Moreover in around the anode to the hypochlorite ions ClO ^over is generated according to formula 2, further passes through the hydrogen ion H shown the hypochlorite ion ClO ^over the the next (of 4) ⁺ Hypochlorous acid is also produced by combining with The same applies to halogens other than chlorine, and hypohalous acid is generated around the anode.

[0037]

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[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 ions and hypohalous acid are substances having strong oxidizing power and bactericidal power. Such a substance having strong bactericidal power is generated at the anode, and the acidic processing liquid is taken out from the discharge port 18. Will be.

The reaction at the cathode is a reduction reaction as shown in (Chem. 5), and generates hydrogen gas H ₂ .

[0040]

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At the anode, when the pH is around 3.5,
Or generated chlorine gas Cl ₂ HClO is decomposed, or generate chlorine gas Cl ₂ is oxidized directly chlorine ions Cl ^{chromatography} as shown by (Formula 6). Generally, halogen gas is generated.

[0042]

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In this embodiment, these generated gases are:
Gas permeable membrane 13 made of porous polytetrachloroethylene
a, 13b, and 13c. However, as can be seen from FIG. 8, the conventional water treatment apparatus does not include such gas permeable membranes 13a, 13b, and 13c, so that when the communication valve 45 and the discharge valve 46 are completely closed, the inside of the tank is closed. It becomes a space, and the generated gas is the electrode 42a,
Electrolysis is stopped by adhering to the surface of 42b and obstructing the flow of current. This is well known as the electrolysis polarization phenomenon. On the other hand, in the present embodiment, gas permeable membranes 13a and 13b as gas permeable portions are provided.
13c, the polarization phenomenon can be avoided and continuous operation can be performed. Further, in this embodiment, since the water treatment is performed by closing the valve 5b, a large amount of treatment liquid not used during electrolysis is discarded unlike the conventional water treatment apparatus. The valve 5b is used for appropriately discharging the remaining liquid in the electrolytic chamber 16 after the completion of the electrolysis, or for relieving fluctuation in the water level.

FIG. 5 is an experimental result diagram showing the relationship between the pH and residual chlorine of the treatment liquid and the use time of the sterilizing and cleaning apparatus as the water treatment apparatus in one embodiment of the present invention. The use time is the time during which the electrolysis is continued and the processing liquid is discharged. Residual chlorine concentration is measured the concentration of the sum of hypochlorous acid HClO and hypochlorite ion ClO ^over. FIG. 5 shows the pH of the raw water in addition to the pH of the processing solution. Conditions of electrolysis voltage 30 V, current 5.0A, the flow rate 0.5 liters / min, the raw water of chlorine ions Cl ^{chromatography} concentration 500 ppm, an inter-electrode distance 20 mm. As the diaphragm, a polyester nonwoven fabric was incorporated with a porous chlorinated polyester membrane as a base, and a porous polytetrafluoroethylene membrane was used as the gas permeable membrane. At this time, the pH of the raw water is around 7.0, but the pH of the processing solution is approximately constant at about 3.6.
Further, the residual chlorine concentration is maintained at about 10.2 ppm, and the pH is stable. As described above, in this embodiment, it is possible to supply sterilized water having a stable pH without waste water.

By the way, the sterilizing and washing apparatus 1 of this embodiment can supply sterilized water having a stable pH,
The pH can be controlled by increasing or decreasing the applied voltage or current. For example, in order to lower the pH by using sterilized water as a strong acid, the pH decreases as the voltage is increased, and the pH similarly decreases even when the current is increased. If the flow rate is reduced by adjusting the valve 4, 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 manner, a processing solution having a desired pH can be obtained. More stable p by providing a pH sensor and controlling
H can be obtained.

The sterilizing / cleaning apparatus of this embodiment is used not only as a general sterilizing apparatus but also as a bathtub water sterilizing apparatus 31 described in FIG. 4, a pool sterilizing apparatus, an acid bath for bedridden elderly people to prevent bedsores, and a COD concentration. Various applications such as high wastewater treatment equipment are conceivable. It is appropriate to use these by controlling the pH to about 5 to 6.

In this embodiment, the diaphragms 17 and 1
9 is used to divide the chamber into three chambers, but as described above, it can be divided into two chambers with one diaphragm. However, in this case, if the operation is performed for a long time,
H may slightly vary. However, if the operation is carried out for a short time, there is hardly any trouble. If the pH is controlled by providing a pH sensor or the like as needed, the problem is practically solved. Conversely, when two or more membranes are used to define three or more chambers, a very stable p
H treatment liquid can be obtained. This is presumably because as the number of the diaphragms increases, the fluid resistance through the diaphragms increases, and the possibility that the electrolyzed processing liquids are mixed further decreases. The number of diaphragms is selected in consideration of the type and thickness of the diaphragm, the use of the sterilizing and cleaning device, and the cost. There is no need to increase the number of diaphragms unless pH stability is not so necessary.

Next, a description will be given of an alkali ion water conditioner according to another embodiment of the present invention. FIG. 3 is a detailed structural diagram of an alkali ion water conditioner which is a water treatment device according to another embodiment of the present invention. 21 is an alkali ion 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 passed through the electrolytic chamber 29a, and discharges alkaline ionized water as a processing liquid from a discharge port 30 of the discharge pipe. Is 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 by a 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 decreases. 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, 22b. The voltage is applied so that the electrode plate 22a serves as an anode and the electrode plate 22b serves as a cathode.
Reference numerals 23a and 23b denote electrolysis chambers 29a and 29c and an intermediate chamber 29b.
It is a dividing membrane. 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 transmitting a halogen gas such as l ₂ gas together with the diaphragms 23a and 23b. Other means may be employed 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 the outlet 30. Therefore, electrolysis chamber 2
9a is not provided with a gas permeable membrane. Of course, a gas permeable membrane 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 sterilizing and cleaning apparatus. Reference numeral 28 denotes a sparingly soluble salt for increasing the efficiency of electrolysis, and a small amount of dissolved ions promote electrolysis. In this embodiment, the sparingly soluble salt is used in the electrolytic chamber 29.
c, but may be stored in the intermediate chamber 29b. This hardly soluble salt is, for example, calcium glycerophosphate. This calcium glycerophosphate increases calcium ions in the treatment solution. This means that a mineral component is added to the alkaline ionized water, thereby giving the alkaline ionized water the properties of mineral water. In other words, accommodating a sparingly soluble salt allows the alkali ion 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 is completed and the liquid in the intermediate chamber 29b. Although not shown in FIG. 3, it is appropriate that the raw water is passed through a water purifier containing activated carbon, a hollow fiber membrane or the like, and then guided to an alkali ion water conditioner 21 via a water supply pipe. The water purifier connected to the alkali ion water purifier 21 is desirably integrated. At this time, purified water purified by the water purifier is supplied to the raw water valves 24 and 25. The treatment liquid discharged from the alkali ion water conditioner by passing through the water purifier is preferable as drinking water.

In the case of this embodiment, raw water or purified water (through a water purifier) introduced from the water supply pipe into the electrolytic chambers 29a, 29c and the intermediate chamber 29b of the alkali ion water conditioner 21 via the raw water valve 24 and the valve 25. ) Is electrolyzed to generate H ₂ gas in the electrolytic chamber 29a as shown in (Chem. 5). That ionized hydrogen ion H ⁺ is that you, (Formula 5) to from consumed gasified capture electrons as a cathode showing the hydrogen ion H ⁺ concentration gradually decreases to go treatment liquid according to (Formula 3) Will rise to show alkalinity. By discharging the alkaline treatment liquid from the discharge port 30, it can be used as alkaline ionized water for drinking water and the like.

In this embodiment, the alkali ion water conditioner 21 which always discharges the alkaline ionized water has been described. However, the use of alkali ionized water is sometimes used, but sometimes acidic ionized water is required. There is a way. For this purpose, the polarity switching means for switching the polarity of the DC power applied to the pair of electrodes 22a and 22b is provided by the electrodes 22a and 22b.
It is desirable to provide between DC 2b and the DC power supply. The polarity switching means may be constituted by a manually operated changeover switch, a toggle switch and a relay, and may be any circuit capable of reversing the connection state.

FIG. 6 is an experimental result diagram showing the relationship between the pH of the treatment liquid and the use time of an alkali ion water purifier as a water treatment apparatus according to another embodiment of the present invention. Also in this case, the use time refers to the time when the processing liquid is discharged after the electrolysis. FIG.
Describes the measurement of the pH of the raw water in addition to the pH of the treatment liquid. The electrolysis conditions were as follows: voltage 30V, current 0.4A,
Flow rate 0.5 l / min, chlorine raw water ion Cl ^over concentration 20
ppm, and the distance between the electrodes is 10 mm. The materials of the diaphragm and the gas permeable membrane are the same as those in FIG. The pH of the raw water is approximately 7.0 for 10 hours, but the pH of the processing solution is stable at 1
0.0. Alkaline ionized water having a very stable pH can be supplied as an alkali ion water conditioner.
In the prior art, the generated acidic ion water in addition to the alkali ion water had to be discarded and discharged as water, but in this embodiment, no waste water is generated. That is, it also contributes to energy saving. By controlling the voltage, current, and flow rate, the pH can be freely controlled.

Next, as another embodiment of the present invention, a bath tub water sterilizing apparatus to be used for sterilizing bath tub water will be described. FIG. 4 is an overall schematic view of a bath tub water sterilization apparatus as a water treatment apparatus according to another embodiment of the present invention. 31 is a bathtub 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 reference numeral 33 denotes a circulation pump which sucks bathtub water from the bathtub 36 and feeds the bathtub water sterilization treatment device 37. The bath water discharged from the bath water sterilization apparatus 37 is returned to the bath 36 again. That is, the water supply pipe of the bathtub water sterilization treatment device 37 is connected to the first bathtub water circulation path including the circulation pump 33 that guides the bathtub water from the bathtub 36, and the treated water treated by the bathtub water sterilization treatment device 37 is again supplied to the bathtub 36. The discharge pipe of the bathtub water sterilization treatment device 37 is connected to a second bathtub water circulation path that returns to the above. The detailed structure of the bath tub water sterilization apparatus 37 is basically the same as the structure shown in FIG. 2, so that the detailed description is omitted here. Bathtub 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 And returned to the bathtub 36.
The acidic ionic water containing hypochlorite ion and hypochlorous acid has a strong bactericidal action, whereby the bath water is disinfected. 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. The concentrated salt solution may be a concentrated aqueous solution of potassium chloride or calcium chloride which does not affect the human body, in addition to sodium chloride.

FIG. 7 is an experimental result diagram showing the relationship between the number of bacteria in the treatment liquid and the usage time of the bath tub water sterilizer as a water treatment apparatus in another embodiment of the present invention. For comparison, the experimental results of the number of bacteria and the use time of the conventional example in the case where an ozonizer is provided in place of the bath water sterilization apparatus 37 of the present embodiment and sterilized are also described. The experimental conditions were as follows:
The data is taken by people using it twice. When the bath water decreased, hot water and water were replenished from valves 34 and 35. Residual chlorine concentration (hypochlorite ion Cl
Total density of O ^over and hypochlorite) is 0.5 ppm.
Since the ozone concentration of the conventional example must be 50 ppb or less according to the water quality standard, the experiment is performed at 50 ppb. For measurement of the number of bacteria, a standard agar medium was used as an agar medium.
The culture temperature was maintained at 37 ° C. for 48 hours. According to FIG. 7, in the case of the present example, the bacterial count was about 10 at about 25 colonies / ml.
Water quality standard for bacterial counts, unchanged for 10 days
0 colonies / ml are sufficiently satisfied. However, in the case of the conventional ozone sterilization, the water quality standard far exceeds the water quality 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 bath water was used, a slimy feeling appeared in the conventional example. However, in the case of the present example, the slimy feeling did not occur.

As described above, the bath tub water sterilizer of this embodiment has an excellent sterilizing power, and the number of bacteria does not increase even if it is continuously operated. Therefore, an optimum sterilizer is provided as a bath tub water sterilizer of a 24-hour bath system. be able to. In addition, there is no need to discharge alkaline ionized water, which can be produced at the same time as electrolysis, as waste water as in a conventional water treatment apparatus. Therefore, a 24-hour bath system does not impair the environment and provides an energy-saving bathtub water sterilizer. can do.

[0055]

According to the water treatment method of the present invention, the treatment liquid is discharged only from the first chamber and the gas is discharged from the second chamber. It can be supplied without doing. Therefore, energy can be saved, and the electrode can be operated continuously without causing polarization.

The water treatment apparatus of the present invention can treat water without discarding water while suppressing the polarization phenomenon with a simple structure.

The generated gas can be effectively exhausted with a simple structure of a gas permeable membrane, and the occurrence of a polarization phenomenon can be reliably 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, alkali ion water and acidic ion water can be appropriately selected and supplied as needed.

Since a sparingly soluble salt is contained, the efficiency of electrolysis can be increased due to a small amount of dissolved ions, and the function of a mineral water generator can be provided.

The sterilizing and washing apparatus of the present invention can supply a processing liquid having a strong sterilizing power containing hypohalous acid and hypohalous acid ions without discarding water.

Since the bathtub water is guided from the bathtub, treated with treated water having a strong sterilizing power and returned to the bathtub again, a sanitary bathtub system without slimming can be provided.

Further, the alkali ion water purifier of the present invention
Alkaline ionized water can be provided without waste water, and purified alkaline ionized water can be provided without waste water because the water purifier is connected.

[Brief description of the drawings]

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

FIG. 2 is a detailed structural view of a sterilizing and cleaning apparatus which is a water treatment apparatus according to one embodiment of the present invention.

FIG. 3 is a detailed structural diagram of an alkali ion water purifier as a water treatment apparatus according to another embodiment of the present invention.

FIG. 4 is an overall schematic view of a bath tub water sterilizer as a water treatment apparatus according to another embodiment of the present invention.

FIG. 5 is an experimental result diagram showing the relationship between the pH and residual chlorine of the treatment liquid and the use time of the sterilizing and cleaning apparatus as the water treatment apparatus in one embodiment of the present invention.

FIG. 6 is an experimental result diagram showing a relationship between a pH of a treatment liquid and a use time of an alkali ion water purifier as a water treatment apparatus in another embodiment of the present invention.

FIG. 7 is an experimental result diagram showing a relationship between the number of bacteria in a treatment liquid and a use time of a bath tub water sterilization apparatus as a water treatment apparatus according to another embodiment of the present invention.

FIG. 8 is a schematic structural view of a conventional alkali ion water conditioner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Disinfection washing apparatus 2, 3, 30a Liquid level detector 4, 5a, 5b, 8a, 10a, 25, 26, 34, 3
5 Valve 6, 7 Pump 8 Salt water tank 9 Raw water tank 10, 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 ionizer 17, 19, 23a, 23b, 43 Diaphragm 28 Insoluble salt 31 Bath tub water sterilizer 33 Circulation pump 36 Bath tub 37 Bath water disinfection unit 48 Anode compartment 49 Cathode compartment

Continuation of the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 520 C02F 1/50 520L 531 531P 540 540B 550 550D 560 560E 560F 1/66 510 1/66 510C 510G 522 522A 530 530 530 530 L 540E 1/68 510 1/68 510B 520 520G 520 530 530B 540 540D 540E (56) References JP-A-62-102889 (JP, A) JP-A 50-50844 (JP, U) JP-A 51-143742 (JP, U) JP 293962 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) C02F 1/46-1/48 C02F 1/50 C02F 1/66-1 / 68 B01D 19/00

Claims (10)

(57) [Claims] 1. A pair of electrodes is provided in a tank containing raw water,
At least one or more diaphragms are juxtaposed between the pair of electrodes to divide the inside of the tank into a plurality of chambers, and the first chamber containing the first electrode of the pair of electrodes is supplied with raw water. While supplying water, the raw water in the tank is electrolyzed, 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 storing raw water, a pair of electrodes provided in the tank, and at least one or more sheets arranged in parallel between the pair of electrodes and partitioning the inside of the tank into a plurality of chambers. Of the diaphragm,
A direct-current power supply applied to the pair of electrodes; a water supply pipe connected to a first chamber containing a first electrode of the pair of electrodes to supply raw water and to supply the raw water in the tank with electricity; Disassembling, connecting a discharge pipe to the first chamber to discharge the processing liquid only from the first chamber, and providing a gas permeable portion to a second chamber containing the other electrode of the pair of electrodes. A water treatment apparatus, comprising: 3. The water treatment apparatus according to claim 2, wherein said gas permeable section is a gas permeable membrane. 4. The apparatus according to claim 2, wherein two or more diaphragms are arranged in parallel, and one or more intermediate chambers are formed in addition to the first chamber and the second chamber. A water treatment apparatus as described in the above. 5. The water treatment apparatus according to claim 2, further comprising polarity switching means for switching the polarity of a power supply applied to said pair of electrodes. 6. The water treatment apparatus according to claim 2, wherein a sparingly 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 juxtaposed between the pair of electrodes and partitioning the inside of the tank into two or more chambers, A water supply pipe connected to a first chamber containing an anode of the pair of electrodes to supply halogen ionized water and electrolyze the halogen ionized water; A discharge pipe was connected to the chamber, and treated water containing hypohalous acid and hypohalous acid ions generated at the anode was discharged only from the first chamber, and the cathode of the pair of electrodes was accommodated. A sterilization and cleaning device, wherein a gas permeable portion is provided in the second chamber. 8. The water supply pipe is connected to a first bath water circulation path for guiding bath water from the bath, and the discharge pipe is connected to a second bath water circulation path for returning the treated water to the bath again. The sterilizing and cleaning apparatus according to claim 7, wherein 9. A pair of electrodes provided in a tank, one or more diaphragms arranged in parallel between the pair of electrodes and partitioning the inside of the tank into two or more chambers, A water supply pipe connected to a first chamber of the pair of electrodes containing a 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 containing the anode among the pair of electrodes. Alkali ion water purifier. 10. An alkali ion water purifier according to claim 9, wherein said water supply pipe is connected to a water purifier to supply purified water to said first chamber.