JP3408218B2 - Water treatment equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large water tub such as a pool or a bath tub, and a small water tub disposed on the roof of a building or a general home tub. Until the bathtub, water stored in various water tanks can be sterilized,
It relates to a novel water treatment device. 2. Description of the Related Art For example, pools installed indoors and outdoors, or baths in inns and public baths are regularly installed in order to maintain the water quality. It is necessary to throw in an aqueous solution of (salt powder, high-grade powder) or sodium hypochlorite (NaClO) for sterilization. However, conventionally, this work was
Employees of pools and baths are working by hand, and since the aqueous solution of khaki and sodium hypochlorite is irritating, be careful when putting them in during business hours. For example, there is a problem that a great deal of labor is required for processing. [0003] In particular, since calcium is a solid powder, it takes a long time until it is dissolved and uniform in concentration after being added, and during that time, there is also a problem that a pool or bathtub cannot be used. In addition, in the case of a water tub placed on the roof of a building or a bath tub for ordinary households, the current situation is to rely only on the sterilizing power of chlorine contained in tap water, especially in the case of a water tub. One of the social problems is that the water quality deteriorates due to the propagation of algae inside. [0004] In the case of a general home tub, it is usually about 1 unit.
It seems that there is no problem in terms of water quality because the water is replaced every two days, but since the inside of the boiler connected to the bathtub cannot be cleaned frequently, germs and fungi easily propagate, There is a concern that the situation will worsen. Therefore, an object of the present invention is to provide a novel water treatment apparatus that can easily and efficiently sterilize water stored in the above various water tanks. Means for Solving the Problems and Effects of the Invention The invention according to claim 1 is a water tank for storing the water to be treated, and an electrolytic cell for sterilizing the water to be treated introduced from the water tank by an electrochemical reaction. A tank and the water to be treated are introduced from the water tank into the electrolytic tank,
In addition to having a water treatment path for returning to the water tank after the sterilization treatment, a supply path for an electrolyte solution containing chlorine ions is disposed upstream of the electrolytic tank in the water treatment path, and the supply of the electrolyte solution causes In the water treatment apparatus for adjusting the chloride ion concentration in the water treatment path from the electrolytic cell
On the downstream side, for sending out the water to be treated in the electrolytic cell to the water tank
A pump is arranged to supply the electrolyte solution in the electrolyte solution supply tank.
The electrolyte supplied to the electrolytic cell when introduced into the electrolytic cell
Hypochlorite ion, water containing hypochlorous acid efficiently
The delivery pump so that it can be converted to a solution
A water treatment apparatus characterized in that the amount of water discharged is reduced . [0006] [0007] [0008] [0009] [0010] [0011] [0012] [0013] In the configuration of the 請 Motomeko 1, first of all, to be treated water stored in the water tank is introduced into the water processing path , Sodium chloride (NaCl) aqueous solution, calcium chloride (CaCl2)
The solution is introduced into the electrolytic cell together with an electrolyte solution containing chlorine ions, such as an aqueous solution or hydrochloric acid (HCl). Next, the following electrochemical reaction takes place by energizing the electrode set in this electrode tank, and the hypochlorite ion (C
lO-), hypochlorous acid (HClO) and chlorine gas (C
The water to be treated can be sterilized with the chlorine-containing compound of l2) or active oxygen (O2-) generated only for a very short time in the course of such a reaction. The water to be treated sterilized in this way is returned to the water tank again through the water treatment path. (Anode side) 4H ₂ O-4e ⁻ → 4H ⁺ + O ₂ ↑ + 2H ₂ O 2Cl ⁻ → Cl ₂ + 2e ⁻ H ₂ O + Cl ₂ ⇔HClO + H ⁺ + Cl ⁻ (cathode side) 4H ₂ O + 4e ⁻ → 2H ₂ ↑ + 4OH - ^(anode + ^{cathode) H + + OH - → H} 2 O the above series of operations are manually e.g. operator, the water treatment path to actuate the pump for circulating the water, and only supplying current to the electrodes pairs After that, there is almost no need for manual intervention, and there is no need for the operator to directly touch the water to be treated. In addition, if the operation of the pump and the energization of the electrode assembly are automated using a timer or the like, the water treatment can be completely automated. Therefore, according to the first aspect of the present invention, it is possible to easily and efficiently sterilize the water to be treated stored in the water tank. Moreover, the concentration of the chlorine-containing compound such as hypochlorite ion in the water to be treated, which is returned to the water tank after the sterilization treatment, is lower than that of a conventional treatment agent such as an aqueous solution of solid powder such as calcium or sodium hypochlorite. It is low, and problems such as irritation are sufficiently reduced. Therefore, the above processing
It can be carried out arbitrarily or periodically even during business hours of a pool or a bath, or it can be carried out arbitrarily according to the quality of the water to be treated which changes depending on the number of visitors, weather, temperature and the like. Therefore, the conventional sterilization work such as directly adding calcium or the like to a pool or a bathtub of a bathhouse can be omitted altogether or the number of times can be significantly reduced, and the burden on the operator can be reduced. Good water quality can be maintained while remarkably reducing. Further, in a water supply tank or the like disposed on the roof of a building, for example, every fixed amount of water used, or every fixed period regardless of the amount of used water,
If the above-mentioned series of operations is performed manually or automatically, propagation of algae, which is a problem, can be suppressed, and deterioration of water quality can be prevented. Further, in a general household bathtub or the like,
For example, when the bathing of one day is completed or before the bath water is drained, if the above series of operations is performed manually or automatically, it is possible to prevent bacteria, mold, etc. in the boiler connected to the bathtub. Reproduction can be suppressed and deterioration of water quality can be prevented. Moreover, in the configuration of claim 1, by supplying an electrolyte solution containing chloride ions to the water to be treated introduced into the electrolytic cell, the concentration of chloride ions in the water to be treated in the electrolytic cell is not reduced. I am adjusting. For this reason, the chlorine generation efficiency in the electrolytic cell can be increased, and as a result, the life of the electrode set can be increased. Further, when the electrolyte solution in the electrolyte solution supply tank is introduced into the electrolysis tank, the output of the delivery pump for sending the electrolyte solution in the electrolysis tank to the water tank is reduced, so that the Can be efficiently converted into an aqueous solution containing hypochlorite ion, hypochlorous acid and chlorine gas . The embodiments of the present invention will be described below with reference to the drawings. This will be specifically described with reference to FIG. Figures 1-3
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the water treatment apparatus 1 which concerns on one Embodiment of this invention, and simplified and showed the state integrated in the large-sized water tank 2 such as a pool and a bathtub. As shown in FIGS.
The water tank 2 has a main circuit 20 incorporating a filter 21 for sand filtration and a heat exchanger 22 for heating the water to be treated.
A large amount of water W to be treated is constantly circulated in the main circulation path 20 by the circulation pump 23 in the direction indicated by the dashed-dotted arrow in the figure. The water treatment path 10 of the water treatment apparatus 1 is branched from a branch point J1 of the main circulation path 20 downstream of the filter 21 to form an electrode set 11 composed of a plurality of electrode plates 110.
After passing through the electrolytic cell 12 having a built-in portion, it is connected so as to join the main circulation path 20 again at a junction J2 on the downstream side of the heat exchanger 22. Branch point J1 of the water treatment path 10
On the way from to the electrolytic cell 12, the stop valve B1, the pressure reducing valve B2 for reducing the pressure, the circulation pump P1 for circulating the water to be treated, the regulating valve B9 for adjusting the flow rate, and the Conductivity sensor S for measuring the total concentration of ions
1. A filter 13 for filtration of the water to be treated, an ion exchange resin 14, a branch point J4 to the water introduction passage 32, a junction J3 with the supply passage 31 of the electrolyte solution containing chlorine ions, and a stop valve B3. Are located. A position between the circulation pump P1 and the conductivity sensor S1 reaches the drain port 10a via a regulating valve B4 for adjusting the flow rate and a residual chlorine sensor S2 for measuring the residual chlorine concentration. The branch path 10b is connected.
The residual chlorine sensor S2 is arranged as described above because, due to its structure, it is necessary to constantly flow a very small amount of water to be treated, which is smaller than the amount of water flowing through the water treatment path 10.
The water to be treated flowing into the residual chlorine sensor S2 may be discarded as it is from the drain port 10a, or may be returned to the water treatment path 10 via a check valve. The inlet 12 of the water to be treated in the electrolytic cell 12
a and a water treatment path 10 between the ion exchange resin 14.
And a supply path 31 for the electrolyte solution containing chlorine ions, which is connected to the junction J3 and is connected to the junction J3. The supply path 31 for the electrolyte solution and the treated water introduction path 32 are both connected to a supply tank 30 for the electrolyte solution containing chlorine ions. In addition, a solenoid valve B7 is provided on the treated water introduction passage 32.
However, a pump P <b> 3 for feeding the electrolyte solution 300 into the electrolytic tank 12 is disposed in the electrolyte solution supply path 31. The electrolyte solution supply tank 30 stores an electrolyte solution 300 such as an aqueous solution of sodium chloride, an aqueous solution of calcium chloride, or hydrochloric acid. This supply tank 30
The electrolyte such as sodium chloride precipitated and deposited in the inside is appropriately dissolved by refluxing the water to be treated from the water introduction passage 32 to the electrolyte solution supply passage 31 and stirring the inside of the supply tank 30. To form an electrolyte solution. When the ion concentration of the water to be treated measured by the conductivity sensor S1 disposed on the upstream side of the electrolyte solution supply path 31 in the water treatment path 10 is low, the electrochemical reaction can be efficiently performed. In this case, the electrolyte solution 300 is supplied from the electrolyte solution supply passage 31 to the electrolytic bath 12.
Sent to. Whether the electrochemical reaction is carried out in the electrolytic cell 12 by supplying electricity to the electrolytic cell 12 is determined according to the quality of the water to be treated, for example, based on the measurement result of the residual chlorine sensor S2. The electrolyte solution supply path 3
Whether or not the electrolyte solution is supplied from No. 1 or the supply amount is determined based on the measurement result of the conductivity sensor S1. This is because, for example, even when the concentration of residual chlorine in the water to be treated is low (that is, when the electrochemical reaction needs to be performed in the electrolytic cell 12), a state where the conductivity is high may occur. is there. By supplying the electrolyte solution based on the ion concentration obtained from the conductivity of the water to be treated, it is possible to prevent the current value in the electrolytic cell 12 from becoming abnormally large. It is preferable that the supply amount of the electrolyte solution is adjusted so that the current value in the electrolytic cell 12 becomes maximum within an allowable range. On the way from the electrolytic cell 12 to the junction J2 in the water treatment path 10, a stop valve B5, a circulation pump P2 for circulating the water to be treated, and a check valve B6 for preventing backflow are arranged in this order from the upstream side. A pressure gauge S3 for measuring the pressure of the water to be treated is connected between the electrolytic cell 12 and the stop valve B5. In order to sterilize the water W to be treated in the water tank 2 using the water treatment apparatus 1 having the above-mentioned components, the circulation pump 23 is first operated as usual, and
As shown by a dashed line in FIG.
While circulating, operate the circulation pumps P1 and P2,
A part of the water to be treated W is introduced into the water treatment path 10. On the other hand, the water to be treated introduced into the water treatment path 10
After the water pressure and the flow rate are adjusted through the pressure reducing valve B2 and the regulating valve B9, the total concentration of ions is measured by the conductivity sensor S1, and the residual chlorine concentration is measured by the residual chlorine sensor S2. 13 to remove organic substances and the like. The amount of pressure reduction by the pressure reducing valve B2 is adjusted according to the measured water pressure of the pressure gauge S3. Next, the water to be treated is sent to the ion exchange resin 14 to remove ions such as calcium and magnesium, and contains chlorine ions based on the measurement result of the ion concentration measured by the conductivity sensor S1. Electrolyte solution 30
After 0 is supplied through the electrolyte solution supply path 31, it is sent to the electrolytic cell 12. In the electrolytic cell 12, the residual chlorine sensor S
Based on the measurement result of the residual chlorine concentration measured in Step 2, the electrode set 11 is energized, and the water to be treated is sterilized by an electrochemical reaction in the electrolytic cell 12.
Thereafter, the water to be treated is returned to the main circulation path 20 at a junction J2 provided downstream of the heat exchanger 22 through a check valve B6 for preventing backflow, and is returned to the water tank 2. Electrode plate 1 constituting electrode set in electrolytic cell 12
For example, gold (Au), platinum (Pt), and palladium (P) are formed on the entire surface of a titanium (Ti) substrate.
d), a thin film of a noble metal such as platinum-iridium (Pt-Ir) coated by a plating method or a baking treatment or the like is used. As the filter 13, for example, a nonwoven fabric of polypropylene fiber or the like is used. Figures 2 and 3
In the embodiment shown in FIG.
A sterilizing agent supply path 40 is further disposed downstream of the main circulation path 20 or downstream of the junction J2 with the water treatment path of the main circulation path 20. The supply path 40 supplies the sterilizing agent. It is connected to the tank 41. In addition, the supply path 40
A pump P4 for feeding the sterilizing agent 42 into the water treatment path 10 or the main circulation path 20 and a check valve B8 for preventing backflow are disposed above. In the supply tank 41 for the sterilizing agent, for example, a sterilizing agent such as sodium hypochlorite (sodium hypochlorite), calcium hypochlorite, and khaki (silk powder, high-grade powder) is usually placed. Is stored in the form of an aqueous solution, preferably in the form of a diluent. In the case of the embodiment shown in FIGS. 2 and 3, the amount of water treatment is large, and it is not possible to sufficiently cope with only the chlorine-containing compounds of hypochlorite ion, hypochlorous acid and chlorine gas generated in the electrolytic cell. Even if it is, the sterilizing agent can be directly supplied from the supply channel 40 of the sterilizing agent. The amount of free chlorine in the chlorine-containing compound generated by the electrochemical reaction in the electrolytic cell is, for example, as follows: the total surface area of the electrode plate is about 1.4 m ² ;
V, and under this condition, saline solution (concentration 0.03
%) Is electrolyzed for 1 minute,
g. In contrast, for example, when an aqueous solution of about 10% sodium hypochlorite is directly supplied to the water treatment path, the amount of free chlorine is 1 minute when the supply amount of the aqueous solution is 100 ml / min. About 10 g. Therefore, if the quality of the water to be treated is not significantly reduced, the sterilization treatment by the above-described electrochemical reaction in the electric tank 12 is performed. This is preferable because the advantage that it can be carried out arbitrarily or regularly even during business hours such as the above is obtained. On the other hand, when the quality of the water to be treated is significantly reduced due to the number of visitors, weather, temperature, etc., it is short-term to use a method of directly supplying a sterilizing agent such as an aqueous solution of sodium hypochlorite. It is preferable from the viewpoint of performing the water treatment in a long time. The sterilizing agent is usually in the form of an aqueous solution,
It is preferably supplied in the form of a diluent. In particular, by supplying in the state of a diluent, problems caused by the irritation of the sterilizing agent can be reduced. further,
In the case of the embodiment shown in FIG.
0 is a junction J2 of the main circulation path 20 with the water treatment path 10.
Since it is connected to the further downstream side, even in the case of interrupting the reflux of the water to be treated W to the water treatment path 10, even if the chlorine-containing compound such as hypochlorite ion due to the electrochemical reaction is removed, The chlorine-containing compound can be supplied to the water to be treated by a different route from the generation. As shown in FIGS. 1 to 3, the water treatment path 10
The junction J2 with the main circuit 20 is preferably provided at a position as close as possible to the connecting portion 20a of the main circuit 20 to the water tank 2 in order to reduce the size of the circulation pumps P1 and P2. The main circulation path 20 is not only connected directly to the water tank 2, but also has a terminal end that is open to the atmosphere so that the water to be treated is transferred to the water tank 2.
It may be in a state of being poured into. The water treatment apparatus 1 provided with the above components is actually installed in a facility such as a pool in a united state as shown in FIGS. 4 (a) and 4 (b), for example. That is, in the cabinet 1a, the filter 1 having the filter 13 and the ion-exchange resin 14 built therein.
b, a power supply device for energizing each of the members such as the electrolytic cell 12 and the circulating pump P2 and an electrode set (not shown) in the electrolytic cell 12 and driving the circulating pump P2 and a constant flow pump P3 described later. 1c and a control device (sequencer) 1d for operating these members according to a predetermined procedure are arranged. Further, an electrolyte solution supply tank 30 for storing an electrolyte solution containing chlorine ions such as sodium chloride adjacent to or in the cabinet 1a.
And a constant flow pump P3 for supplying the electrolyte solution from the electrolyte solution supply tank 30 into the water treatment path 10. These members are connected by a pipe 10c constituting a part of the water treatment path 10, whereby the water treatment apparatus 1 is constituted. FIG. 5 is a view showing another embodiment of the water treatment apparatus 1 according to the present invention, in which a small water tank 3 such as a water supply tank disposed on the roof of a building or a bathtub for general household is used. It is a simplified illustration of the assembled state. As shown in FIG. 5, in this embodiment, since the main circulation path 20 described above is not inherently provided, the water treatment path 10 of the water treatment apparatus 1 is directly connected to the water tank 3, The overall configuration has been simplified. In the water treatment path 10, the water tank 3 to the electrolytic tank 12
On the way to the stop, in order from the upstream side, a stop valve B1, a circulation pump P1 for circulating the water to be treated, a regulating valve B9 for adjusting the flow rate, and a conductivity sensor for measuring the total concentration of ions in the water to be treated. S1, a filter 13 for filtering treated water,
Branch point J to ion-exchange resin 14 and treated water introduction path 32
4. A junction J3 with the supply path 31 for the electrolyte solution containing chlorine ions and a stop valve B3 are arranged. The pressure reducing valve B2 for reducing the pressure is omitted because it is not necessary. A position between the circulation pump P1 and the conductivity sensor S1 reaches the drain port 10a via a regulating valve B4 for adjusting the flow rate and a residual chlorine sensor S2 for measuring the residual chlorine concentration. The branch path 10b is connected.
Between the electrolysis tank 12 and the ion exchange resin 14, in order from the upstream side of the water treatment path 10, the treated water introduction path 32 connected to the branch point J4 and the chlorine ion connected to the junction J3 are removed. And a supply path 31 for the containing electrolyte solution,
The supply path 31 of the electrolyte solution and the treated water introduction path 32
Both are connected to a supply tank 30 for an electrolyte solution containing chlorine ions. An electromagnetic valve B7 is provided on the water introduction passage 32, and an electrolyte solution 30 is provided on the electrolyte solution supply passage 31.
A pump P3 for sending 0 to the electrolytic cell 12 is provided. In the water treatment path 10, the electrolytic tank 12 to the water tank 3
A circulating pump P2 for circulating the water to be treated and a check valve B6 for preventing backflow are arranged in order from the upstream side, and between the electrolytic cell 12 and the circulating pump P2. A pressure gauge S3 for measuring the pressure of the water to be treated is connected. Of these, the check valve B6 is used to connect the terminal of the water treatment path 10 to the water treatment path 10 due to the fact that the end of the water treatment path 10 is connected below the normal water level of the water W to be treated. It is provided at the position shown in FIG. 5 for the purpose of preventing the backflow of the water to be treated W. The check valve B6 is used, for example, when the terminal end of the water treatment path 10 is set above the normal water surface of the water W to be treated in the water tank 3, and when the water to be treated is poured while being opened to the atmosphere. Can be omitted. The procedure for sterilizing the water to be treated W in the water tank 3 using the water treatment apparatus 1 having the above-described components is connected to the main circulation path and the middle of the main circulation path as shown in FIGS. This is the same as the example having the water treatment path. That is, first, the circulating pumps P1 and P2 are operated to introduce the water W to be treated in the water tank 3 into the water treatment path 10. The introduced water to be treated is first supplied to the regulating valve B9.
After the flow rate is adjusted, the total concentration of ions is measured by the conductivity sensor S1, and the residual chlorine concentration is measured by the residual chlorine sensor S2, and then sent to the filter 13.
Organic substances and the like are removed. Next, the water to be treated is sent to the ion exchange resin 14, where ions such as calcium and magnesium are removed. Based on the measurement result of the ion concentration measured by the conductivity sensor S1, the electrolyte solution 300 containing chlorine ions is used. Is supplied through the electrolyte solution supply path 31 and then sent to the electrolytic cell 12. In the electrolytic cell 12, the electrode set 11 is energized based on the measurement result of the residual chlorine concentration measured by the residual chlorine sensor S2. Processing is performed. Thereafter, the water to be treated is returned to the water tank 3 through a check valve B6 for preventing backflow. The present invention is not limited to the above embodiment, and various changes can be made within the scope of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an embodiment of a water treatment apparatus according to the present invention, and is a view showing a simplified state of being incorporated in a large water tank such as a pool or a bathtub. . FIG. 2 is a view showing another embodiment of the water treatment apparatus according to the present invention, and is a view showing a simplified state of being incorporated in a large water tank such as a pool or a bathtub. FIG. 3 is a view showing still another embodiment of the water treatment apparatus according to the present invention, and is a view showing a simplified state of being incorporated in a large water tank such as a pool or a bathtub. FIGS. 4 (a) and (b) are a front view and a side view of a unit in which the water treatment apparatus of the present invention is disposed in a cabinet.
It is the figure where the front and side panels of the cabinet were removed. FIG. 5 is a diagram showing a simplified structure of an embodiment of the water treatment apparatus according to the present invention incorporated in a small water tank such as a water supply tank disposed on the roof of a building or a general home bathtub. . [Description of Signs] 1 Water treatment apparatus 2 Water tank 10 Water treatment path 12 Electrolyte tank 31 Supply path W for electrolyte solution containing chlorine ions Water to be treated

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI C02F 1/50 540 C02F 1/50 540B 550 550D 560 560A 560D 560Z 1/76 1/76 A 9/00 502 9/00 502A 502D 502J 502M 503 503A 503F 504 504B (72) Kazura Kawamura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Minoru Kishi 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Yasuhiko Shimizu 2-chome, Keihanhondori 2-chome, Moriguchi City, Osaka Prefecture No.5-5 Sanyo Electric Co., Ltd. (72) Inventor Minoru Nakanishi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka (56) References JP-A-9-323008 (JP, A) JP-A-8-281270 (JP, A) JP-A-2-149395 (JP, A) JP-A-11-207353 ( JP, A) JP-A-9-157900 (JP, A) JP-A-11-179364 (JP, A) JP-A-11-319832 (JP, A) JP-A-5-115870 (JP, A) JP-A-11-114001 (JP, A) JP-A-9-327407 (JP, A) JP-A-11-33532 (JP, A) JP-A-2-108794 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) C02F 1/46 C02F 1/42 C02F 1/50

Claims (1)

(57) [Claims 1] A water tank for storing the water to be treated, an electrolytic tank for sterilizing the water to be treated introduced from the water tank by an electrochemical reaction, and a water tank for transferring the water to be treated from the water tank. A water treatment path which is introduced into the electrolytic cell and is returned to the water tank after the sterilization treatment is provided, and a supply path for an electrolyte solution containing chlorine ions is arranged on the upstream side of the electrolytic tank in the water treatment path. Water treatment to adjust the chloride ion concentration in the electrolytic cell by supplying
In the apparatus, downstream of the electrolytic cell in the water treatment path,
A delivery pump for delivering water to the tank is provided,
When introducing the electrolyte solution in the solution supply tank into the electrolytic tank,
The electrolyte solution supplied to the electrolytic cell is efficiently converted to hypochlorous acid.
It can be converted to an aqueous solution containing ions and hypochlorous acid
Therefore, it is necessary to reduce the delivery amount of the delivery pump.
Characterized water treatment equipment.