JPH08294689A - Sterilizing and washing mechanism of apparatus having reverse osmosis membrane treatment tank - Google Patents

Abstract

PURPOSE: To prevent the loss of sterilizing power after the sterilization of org. matter by changing over a reverse osmosis membrane treated water pipeline to a bypass circuit to perform anion exchange treatment and subsequently electrolyzing reverse osmosis membrane treated water to perform sterilization and washing. CONSTITUTION: When an artificial dyalitic apparatus 1 is operated, the changeover valves 9, 13 of a supply pipeline 8 are opened toward a machinery main body 2 and reverse osmosis membrane treated water is supplied to the machinery main body 2 to be subjected to artificial analysis. When the artificial dyalitic apparatus is sterilized and washed, the changeover valves 9, 13 are opened toward a bypass circuit 10. Whereupon, reverse osmosis membrane treated water flows to an anion exchange treatment tank 11 and chlorine ions are substituted with hydrogen ions to remove chlorine. Subsequently, the treated water is introduced into a silver electrolytic cell 12 to be electrolized. Herein, silver ions are eluted to form sterilizig water containing silver hydroxide and having strong sterilizing power and this water is sent to the machinery main body 2 from the bypass circuit 10 to sterilize and wash the same.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has a reverse osmosis membrane treatment tank in a fluid supply line for use of equipment such as an artificial hemodialysis apparatus and an IC cleaning apparatus, and uses water and the like subjected to reverse osmosis membrane treatment. The present invention relates to a sterilization / cleaning mechanism for equipment that performs predetermined processing.

[0002]

2. Description of the Related Art A device using high-purity water, such as an artificial dialysis device or an IC cleaning device, is generally equipped with a reverse osmosis membrane treatment device and uses water subjected to the reverse osmosis membrane treatment of the equipment main body. You are doing the work you want. Due to the nature of this type of device, it is necessary to sterilize and clean the device body and reverse osmosis membrane as necessary.

Conventionally, a cleaning solution using sodium hypochlorite has been used for sterilization / cleaning of an artificial hemodialysis machine and the like, and this cleaning solution is supplied from the outside to the water circuit of the system to sterilize the reverse osmosis membrane and the equipment body. I was cleaning.

[0004]

However, since a cleaning solution using sodium hypochlorite loses its bactericidal power due to a chemical reaction with an organic substance, it must be used at a high concentration to obtain a predetermined bactericidal / cleaning effect. There must be. Further, in the past, since the cleaning liquid was poured from the outside of the device, the amount of water flowing through the cleaning liquid had to be adjusted to a water flow amount that was suitable for the reverse osmosis membrane of the device, and attention had to be paid to the flow rate adjustment. It was

Therefore, a first object of the present invention is to provide a reverse osmosis membrane treatment tank in various devices for performing a desired work by utilizing the treated water produced in the reverse osmosis membrane treatment tank. It is an object of the present invention to provide the above apparatus in which the main body of the device and / or the reverse osmosis membrane is sterilized and washed with silver electrolytic sterilizing water by switching the water flow path, and the sterilizing power is not lost even after sterilizing the organic matter.

Another object of the present invention is to sterilize / wash water pH.
It is an object of the present invention to provide the device further comprising means for controlling.

[0007]

In order to achieve the above-mentioned first object, a reverse osmosis membrane treatment tank is provided, and an apparatus for performing a desired work by utilizing the reverse osmosis membrane treated water adjusted in this treatment tank. In the sterilization / cleaning mechanism, a bypass circuit whose flow path is switched by a switching valve is formed in the treated water supply pipe between the reverse osmosis membrane treatment tank and the main body of the equipment, and an anion exchange treatment tank and silver electrolysis are formed in this bypass circuit. It is characterized in that the tank is interposed in an upstream / downstream relationship so that the switching valve forms a silver electrolyzed water supply path for sterilization / washing to the apparatus body. Preferably, a silver electrolyzed water supply path may be further formed from the silver electrolysis tank downstream side of the bypass circuit to the reverse osmosis membrane treatment tank via a switching valve. The switching valve may be opened selectively to the device body and the reverse osmosis membrane treatment tank, or may be opened to both.

In order to achieve the above-mentioned second object, the present invention is the above-mentioned device, wherein the bypass circuit for adjusting sterilizing / washing water further comprises pH adjusting means for controlling the pH of the fluid passing through the circuit. It is characterized by being provided.

Examples of the pH adjusting means provided in the bypass circuit include a cation exchange tank, a pH adjusting solution adding section, and a membrane-separated or membrane-less electrolytic cell.

The cation exchange tank is interposed in a bypass branched from the bypass circuit, and the cation-treated water is mixed with the treated water before or after the anion-exchange treatment tank or before or after the silver electrolytic cell. It is supposed to do.

[0011]

The treated water that has passed through the reverse osmosis membrane treatment tank is usually supplied to the main body of the equipment such as the artificial dialysis machine and used for the work suitable for the original purpose of the equipment. When sterilizing and cleaning the equipment body, open the switching valve of the reverse osmosis membrane treated water pipeline to the bypass circuit side, and the reverse osmosis membrane treated water is anion-exchanged in the anion-exchange treatment tank of the bypass circuit to remove chlorine. Adjusted to water. Next, this water is electrolyzed in a silver electrolytic cell having a silver electrode as an anode, and silver ions are eluted in the water. Generally, when silver ions are eluted into water containing chlorine such as tap water, Ag ions are combined with Cl ions to form silver chloride. In the present invention, Ag ions are added to water from which chlorine has been removed by anion exchange. As it elutes, Ag ions combine with OH ions in water to produce silver hydroxide (AgOH) having stronger bactericidal activity. Thus, the water having a strong sterilizing power containing silver hydroxide is passed from the bypass circuit to the device body, so that the device body is sterilized and washed.

On the other hand, when the silver electrolysis tank downstream side switching valve of the bypass circuit is operated to open the silver electrolyzed water supply passage to the reverse osmosis membrane treatment tank, sterilizing water is passed to the reverse osmosis membrane treatment tank and reverse osmosis is performed. The membrane is sterilized and washed.

If the bypass circuit is provided with a pH adjusting means, it becomes possible to control the pH of the sterilized water to a desired value. When the pH adjusting means is a cation exchange treatment tank,
After lowering the pH of a portion of the water before the anion exchange treatment by the cation exchange treatment, mix it with the water before the anion exchange treatment or treat the portion after the anion exchange treatment with the cation exchange treatment. By mixing with the anion-exchange treated water, the pH of the chlorine-removed treated water supplied to the silver electrolytic cell is controlled. The pH of the sterilized water is adjusted by electrolyzing this water in a silver electrolytic cell.

After part of the anion exchange-treated water is subjected to cation exchange treatment, the pH of the sterilized water is controlled by mixing with the silver electrolyzed water downstream of the silver electrolyzer, and the pH of the equipment body or the reverse osmosis treatment tank is controlled. Sterilized and washed with controlled sterilized water.

The pH of the sterilizing water can also be adjusted by adding the pH adjusting solution from the pH adjusting solution adding section to the anion-exchange treated water on the upstream side of the silver electrolytic cell or the silver electrolytic water on the downstream side of the silver electrolytic cell. Adjusted.

Furthermore, when a diaphragm or non-diaphragm electrolyzer for pH value adjustment is interposed between the anion exchange treatment tank and the silver electrolytic cell, the pH of the anion exchange treated water is adjusted by electrolysis for pH adjustment. Adjusted.

When a switching passage is formed in the bypass circuit from the drain pipe of the reverse osmosis membrane treatment tank via the switching valve, the reverse osmosis is opened by operating the switching valve during sterilization / cleaning. The membrane sterilization / washing water supply channel joins the bypass circuit, water containing minerals is supplied to the silver electrolyzer to improve electrolysis efficiency, and the entire raw water supply is effectively used. In addition, reverse osmosis membrane treatment wastewater containing Cl ions and the like is anion-exchanged in a bypass circuit, so that Cl in water is dissolved.
Ions and the like are replaced with OH ions, and the pH is adjusted to a high level. Furthermore, the sterilizing water supply circuit to the reverse osmosis membrane treatment tank becomes a circulation circuit that passes through the silver electrolysis tank, so that the reverse osmosis membrane is automatically and repeatedly sterilized and washed by sterilizing water having a high silver Ag ion concentration. It

[0018]

Embodiments of the present invention will be described below. The present invention is provided with an integrated reverse osmosis membrane treatment tank, and is applied to an apparatus for performing a target work by using the reverse osmosis membrane treated water adjusted in this treatment tank. Here, an artificial dialysis apparatus for blood is used. An example will be described.

The artificial dialysis apparatus 1 of this type is integrally provided with a reverse osmosis membrane treatment tank 3 for performing reverse osmosis membrane treatment of supply raw water to supply treated water to the apparatus main body 2 and discarding waste water to a drain or the like. After removing about 90% of the impure component in the water by the osmotic membrane treatment, this treated water is supplied to the dialysate supply unit 4 of the device body 3, and the dialyzing stock solution 5 is added to adjust the dialysate.
The adjusted dialysate is introduced into the dialyzer 7 via the monitoring device 6, is used for artificial dialysis of blood, and is then drained to the outside. Therefore, the treated water outlet of the reverse osmosis membrane treatment tank 2 and the dialysate supply unit 4 of the device body 2 are connected by the reverse osmosis membrane treated water supply pipe line 8.

In order to form a sterilizing / cleaning liquid supply line by using the treated water supply pipe line 8, the supply pipe line 8 is branched from the supply pipe line 8 via the switching valve 9 and merges with the supply pipe line 8. The bypass circuit 10 is formed, and an anion exchange treatment tank 11 and a silver electrolytic tank 12 are interposed in series in the bypass circuit 10 in the upstream / downstream positional relationship. In the drawing, as a more preferred embodiment, a switching valve 13 is provided also at the confluence of the bypass circuit 10 and the supply pipe line 8 so that the bypass circuit 10 is completely closed from the supply pipe line 8 when not in use. .

The anion exchange treatment tank 11 is for removing chlorine of the reverse osmosis membrane treated water whose flow path is switched to the bypass circuit 10 by the switching valve 9, whereby the silver electrolysis tank 12 on the downstream side is removed. Is supplied with treated water from which chlorine has been removed.

The silver electrolytic cell 12 uses at least a silver electrode for the anode, and is used for the purpose of applying a current between the anode and the cathode to elute silver ions into the water in the cell. In the illustrated embodiment, Silver electrodes are used for both the anode and cathode electrodes 12a and 12b, and the polarity of the current applied to both silver electrodes is changed so that silver electrolysis can be continuously performed.

On the other hand, a supply passage 15 is provided in the reverse osmosis membrane treatment tank 3 from the downstream side of the silver electrolytic cell 12 of the bypass circuit 10 via the switching valve 14, and the switching valve 14 is connected to the supply path 15.
By opening to the side, the water in the bypass circuit flows into the reverse osmosis membrane treatment tank 3. The switching valve on the downstream side of the silver electrolytic cell may be selectively opened to the device main body and the reverse osmosis membrane treatment tank, or may be opened to both sides by using a three-way valve as shown in the figure.

Thus, in the embodiment of FIG. 1, when the artificial dialysis apparatus 1 is in operation, the switching valves 9 and 13 of the supply line 8 are opened to the main body of the equipment, and the reverse osmosis membrane-treated water is supplied to the main body of the artificial dialysis. I do.

When sterilizing and washing the artificial dialysis device 1 after dialysis, etc., when the switching valves 9 and 13 are opened to the bypass circuit 10 side, the reverse osmosis treated water flows into the anion exchange treatment tank 11,
Here, chlorine ions in water are replaced with hydrogen ions to remove chlorine. In this case, since the reverse osmosis membrane-treated water is anion-exchanged in the anion-exchange treatment tank 11, the anion-exchange treatment is efficiently performed.

In the anion-exchanged treated water, silver ions are eluted into the treated water from which chlorine has been removed by anion exchange in the downstream silver electrolytic cell 12. In this case, in the silver electrolysis tank 12, silver ions are eluted into the treated water from which chlorine has been removed by anion exchange, so the water in the silver electrolysis tank 12 contains silver hydroxide efficiently and becomes water with a strong sterilizing power. Thus, this sterilizing water is introduced from the bypass circuit 10 into the device body 2 and the device body 2
Are sterilized and washed.

When the switching valve 14 provided on the downstream side of the silver electrolysis tank 12 of the bypass circuit 10 is opened to the supply passage 15 side, the sterilizing water is introduced into the reverse osmosis membrane treatment tank 3 through the supply passage 15 and the treatment tank. 3, especially the reverse osmosis membrane (not shown) inside the
To be washed.

The apparatus of the present invention preferably adjusts the pH of the treated water anywhere in the bypass circuit 10 so that the pH of the sterilized water can be controlled.

For this reason, in the embodiment shown in FIG. 2, a bypass 17 is formed in the conduit between the anion exchange treatment bath 11 and the silver electrolysis bath 12 of the bypass circuit 10 via the flow rate adjusting member 16. The bypass 17 is provided with a cation exchange treatment tank 18, and a part of the anion exchange treated water is cation exchanged to p.
By lowering H, the treated water is joined to the anion exchange treated water so that the pH of the whole treated water can be adjusted.

In the embodiment of FIG. 3, for the same purpose, a bypass 17 is formed between the downstream side of the anion exchange treatment tank 11 and the downstream side of the silver electrolysis tank 12 via the flow ratio adjusting member 16, and the bypass 17 is positively connected. An ion exchange treatment tank 18 is provided. In this embodiment, a part of the anion-exchange treated water is cation-exchanged, and the cation-exchange treated water is mixed with silver electrolyzed water to adjust the pH of the sterilizing water.

Further, the embodiment of FIG. 4 has the bypass circuit 10
The bypass 17 having the cation exchange treatment tank 18 interposed is formed on the upstream side of the anion exchange treatment tank 11 of FIG. Treatment is performed so that the pH of the sterilized water eventually reaches a desired value.

In the embodiment shown in FIG. 5, the bypass circuit 10 has a pH value.
The adjustment solution supply unit 19 is provided, and the pH adjustment solution is added to the treated water of the bypass circuit 10 to adjust the pH.
In this case, the pH adjusting solution supply unit 19 is not limited to being installed on both the upstream side and the downstream side of the silver electrolysis tank 12 as shown in FIG. 5, and may be installed on only one of them.

In the embodiment shown in FIG. 6, another electrolytic bath 2 is provided between the anion exchange treatment bath 11 and the silver electrolytic bath 12 of the bypass circuit 10.
The pH of the sterilized water is adjusted to a desired pH by electrolyzing water in the silver electrolysis tank 12 in which the pH is adjusted by electrolysis in the electrolysis tank 20. As shown in FIG. 6, this electrolytic cell 20 is
Although the case of using the diaphragm electrolyzer is illustrated, a non-diaphragm electrolyzer may be used. When using the diaphragm electrolyzer, the pH can be adjusted also by changing the drainage mixing ratio of water in the cathode chamber and water in the anode chamber.

1 to 6, the non-use side drainage of the reverse osmosis membrane treatment tank 3 is drained directly from the drainage pipe 21 to the drain 22, but as shown in FIG. In addition, a conduit 24 branched from the drainage conduit 21 via a switching valve 23 is preferably joined to the bypass circuit 10 by a merging valve 25.
Sterilization of the device body or reverse osmosis membrane
At the time of cleaning, the switching valve 23 is opened to the bypass circuit 10 side so that the non-use side drainage of the reverse osmosis membrane treatment tank 3 is bypass circuit 1.
It is more preferable that the flow rate be zero. Since the water on the non-use side drained from the reverse osmosis membrane treatment tank 3 contains electrolyte minerals and the like, it is possible to combine this water with the bypass circuit 10 so that the electrolysis efficiency of the silver electrolytic cell 12 and the electrolytic cell 20 is increased. Will get better. In addition, since the drainage is also used, the water can be effectively used.

Although FIG. 7 corresponds to FIG. 1,
The present invention includes the configuration of FIGS. 2 to 6 similar to that of FIG. Further, in the illustrated embodiment, the artificial dialysis device including the reverse osmosis membrane treatment tank has been described as an example, but the present invention is not limited to this, and the reverse osmosis membrane treatment tank such as an IC cleaning device is provided. The present invention is applicable to all devices using the reverse osmosis membrane treated water generated by this device.

[0036]

[Effect] According to the present invention, since a device for producing silver sterilizing water is provided in the bypass circuit of the reverse osmosis membrane treated water pipe of various devices equipped with the reverse osmosis membrane treatment tank, the device main body or reverse The osmotic membrane can be sterilized and washed with silver sterilized water.

In particular, in the present invention, since the silver sterilizing water generator elutes silver ions into water from which chlorine has been removed by anion exchange treatment, the silver sterilizing water produced is highly sterilizing silver hydroxide sterilizing and is low. A high bactericidal effect can be obtained even at a high concentration.

The pH of the sterilized water can be controlled to a desired value by providing a pH adjusting means in the bypass circuit for generating the sterilized water.

By merging the waste water on the non-use side of the reverse osmosis membrane treatment tank with the bypass circuit for sterilizing water production, the electrolysis efficiency of sterilizing water production is improved, and the effective use of water can be achieved.
Can be adjusted higher. It is also possible to supply silver hydroxide sterilized water having a higher silver ion concentration.

Since the sterilizing water supply circuit is incorporated in the reverse osmosis membrane-treated water supply path, sterilizing water having a water pressure suitable for the apparatus is automatically supplied.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an apparatus showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an apparatus showing another embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an apparatus showing another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of an apparatus showing another embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of an apparatus showing another embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of an apparatus showing another embodiment of stacking books.

FIG. 7 is a schematic configuration diagram of an apparatus showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Artificial dialysis device, 2 ... Equipment main body, 3 ... Reverse osmosis membrane treatment tank, 4 ... Dialysate supply part, 5 ... Dialysis stock solution, 6 ... Monitoring device, 7 ... Dialyzer, 8 ... Supply pipeline, 9, 13 ,
14, 23 ... Switching valve, 10 ... Bypass circuit, 11 ...
Anion exchange treatment tank, 12 ... Silver electrolysis tank, 15 ... Supply path, 16 ... Flow rate adjusting member, 17 ... Bypass, 1
8 ... Cation exchange treatment tank, 19 ... pH adjusting solution supply section, 20 ... Electrolyte tank, 21 ... Drainage line, 22 ... Drain.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C02F 1/50 520 C02F 1/50 520P 531 531E 540 540Z 550 550H 560 560E 560D 560F 1/66 510 1 / 66 510K 530 530G 540 540D 540C 540E 540G

Claims (8)

[Claims] 1. A sterilization / cleaning mechanism for an apparatus that comprises a reverse osmosis membrane treatment tank and uses the reverse osmosis membrane-treated water prepared in this treatment tank to perform a desired operation. A bypass circuit, whose flow path is switched by a switching valve, is formed in the treated water supply pipe of the above, and an anion exchange treatment tank and a silver electrolytic cell are interposed in the bypass circuit in an upstream / downstream relationship, and the switching valve is provided. A sterilization / cleaning mechanism for a device having a reverse osmosis membrane treatment tank, characterized in that a silver electrolyzed water supply path for sterilization / cleaning is formed in the main body of the device. 2. A sterilization / cleaning mechanism for an apparatus that comprises a reverse osmosis membrane treatment tank and uses the reverse osmosis membrane-treated water prepared in this treatment tank to perform a desired operation, wherein the reverse osmosis membrane treatment tank and the equipment body are connected to each other. A bypass circuit, whose flow path is switched by a switching valve, is formed in the treated water supply pipe of the above, and an anion exchange treatment tank and a silver electrolytic cell are interposed in the bypass circuit in an upstream / downstream relationship, and the switching valve is provided. Is configured so that a silver electrolyzed water supply path for sterilization and cleaning is formed in the main body of the equipment, and further, silver electrolyzed water is supplied to the reverse osmosis membrane treatment tank from the downstream side of the silver electrolysis tank of the bypass circuit via a switching valve. A sterilization / cleaning mechanism for an apparatus having a reverse osmosis membrane treatment tank, characterized by forming a supply path 3. A bypass is formed in the conduit between the anion exchange treatment tank of the bypass circuit and the silver electrolytic cell through a flow rate adjusting member, and a cation exchange treatment tank is interposed in the bypass circuit. Sterilization / cleaning mechanism of an apparatus having a reverse osmosis membrane treatment tank according to 1 or 2 4. A bypass is formed from the anion exchange treatment tank downstream side pipe line of the bypass circuit to the silver electrolytic cell downstream side pipe line via a flow ratio adjusting member, and the cation exchange treatment tank is interposed in this bypass. 3. A sterilization / cleaning mechanism for an apparatus having a reverse osmosis membrane treatment tank according to claim 1 or 2. 5. The method according to claim 1, wherein a bypass is formed in the upstream side pipe line of the anion exchange treatment tank of the bypass circuit via a flow ratio adjusting member, and the cation exchange treatment tank is interposed in the bypass. Sterilization and cleaning mechanism for equipment with reverse osmosis membrane treatment tank 6. A sterilization / cleaning mechanism for an apparatus having a reverse osmosis membrane treatment tank according to claim 1 or 2, wherein a pH adjusting solution addition section is provided in a downstream side pipe line of the anion exchange treatment tank of the bypass circuit. 7. The electrolytic cell having a diaphragm or a non-diaphragm for pH adjustment is interposed between the anion exchange treatment tank of the bypass circuit and the silver electrolysis tank.
Sterilization / cleaning mechanism of device having reverse osmosis membrane treatment tank described 8. A pipe line is further connected from the drain pipe of the reverse osmosis membrane treatment tank to the upstream side of the silver electrolysis tank of the bypass circuit via a switching valve. Or a sterilization / cleaning mechanism for an apparatus having a reverse osmosis membrane treatment tank according to 6