JPH10140384A - Device for simultaneously generating strongly alkaline water and hypochlorous acid sterilizing water by electrolysis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an integrated device for efficiently generating a strongly alkaline water at pH 10.5 to 13.5 and the aq. hypochlorous acid contg. 2-200ppm hypochlorous acid at the same time. SOLUTION: A dilution water feed pipe 17 is connected respectively to the discharge pipes 8 and 8' of a diaphragm-provided electrolytic cell 1 having a chloride brine feed circuit 7 on the cathode-compartment side and to the discharge pipes 9 and 9' on the anode-compartment side. A diaphragm-free electrolytic water regulator 52 for electrolyzing the chloride brine to generate aq. hypochlorous acid is jointly used, and a pH and concn. adjusting pipeline 53 for supplying a part of the strongly acidic water generated in a diaphragm- provided electrolytic water regulator to the aq. hypochlorous acid is provided. A passage switching means 69 is furnished to alternatively or selectively open or close the feed circuit 7 and dilution water feed pipe 17. A branch water discharge pipe is provided to the discharge pipes 9 and 9', and a device 29 for hypochlorous acid and for reducing gaseous chlorine is furnished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolysis of an aqueous solution containing a chloride salt such as sodium chloride and the like.
3.5 strong alkaline water, pH 3-8, hypochlorous acid concentration 2
The present invention relates to an apparatus for producing ~ 200 ppm of hypochlorous acid water (sterilized water).

[0002]

Background of the Invention When washing dishes and the like, washing with strong alkaline water and then sterilizing with hypochlorous acid water having a pH of 3 to 8 provides an efficient washing and sterilizing effect. In addition, metal appliances sterilized with hypochlorous acid water are less likely to rust when neutralized with alkaline water. As described above, the hypochlorite sterilized water and the strong alkaline water by electrolysis may be used at the same time, or may be used before and after, and a simultaneous supply means of the strong alkaline water and the hypochlorite sterilized water that can respond to this is demanded. Have been.

[0003]

Conventionally, since there is no integrated apparatus for simultaneously producing these waters, there are two electrolysis apparatuses, one for producing hypochlorite sterilized water and the other for producing strongly alkaline water. Special machines had to be used independently. For this reason, a large amount of harmful substances such as chlorine gas not used are generated, and the electrolyzed water on the non-use side of each electrolytic cell is discarded, so that there is much waste water.

Accordingly, a first object of the present invention is to provide an integrated apparatus, which comprises strongly alkaline water having a pH of 10.5 to 13.5 and pH 3
It is an object of the present invention to provide an apparatus for efficiently producing hypochlorous acid water having a hypochlorous acid concentration of 2 to 200 ppm at the same time.

[0005] A second object of the present invention is to provide an integrated device, wherein
Provided is an apparatus for simultaneously and efficiently producing three types of water of hypochlorous acid water and strongly acidic water having a strong alkaline water of H10.5 to 13.5, a pH of 3 to 8, and a hypochlorous acid concentration of 2 to 200 ppm. It is in. The strongly acidic water in this case is used for neutralizing strong alkaline water used for washing dishes and the like.

A third object of the present invention is to convert hypochlorous acid and chlorine gas, which are excessively discharged in the production of strong alkaline water and hypochlorous acid water, into safe hydrochloric acid. An object of the present invention is to provide a device capable of draining water.

A fourth object of the present invention is to dilute water obtained by electrolyzing a high-concentration aqueous chloride salt solution to produce the above-mentioned target water, and to reduce the total amount of raw water supplied from a raw water supply main pipe. It is an object of the present invention to provide the above-described apparatus which can perform an operation of selectively electrolyzing a strongly alkaline water and a strongly acidic water without diluting the electrolyzed water as an aqueous solution of a chloride salt without diluting the electrolyzed water.

In order to achieve the first object, the apparatus according to the present invention comprises a water supply pipe circuit for an aqueous solution of a chloride salt on one side of a diaphragm electrolytic cell partitioned into a cathode chamber and an anode chamber via an electrolytic diaphragm. It has a cathode chamber side discharge pipe and an anode chamber side discharge pipe on the other side, and electrolyzes a chloride salt aqueous solution supplied from a water supply pipe circuit to discharge strong alkaline water from the cathode chamber side discharge pipe, and A diaphragm electrolyzer for discharging strongly acidic water containing hypochlorous acid and chlorine gas from a discharge pipe on the room side; a dilution water supply pipe for supplying and diluting raw water to strong alkaline water in a discharge pipe on the cathode chamber side; A diluting water supply pipe for supplying and diluting raw water to the strongly acidic water in the chamber side discharge pipe; and a simultaneous generation apparatus for strong alkaline water and hypochlorous acid sterilizing water by electrolysis.

A first object of the present invention is to provide a water supply pipe circuit for an aqueous solution of a chloride salt on one side of a diaphragm electrolytic cell partitioned into a cathode chamber and an anode chamber via an electrolytic diaphragm, and to discharge the cathode chamber side discharge on the other side. It has a tube and an anode chamber side discharge pipe, electrolyzes the chloride salt aqueous solution supplied from the water supply pipe circuit, discharges strong alkaline water from the cathode chamber side discharge pipe, and hypochlorous acid from the anode chamber side discharge pipe. A diaphragm electrolyzer for discharging strongly acidic water containing chlorine gas; a dilution water supply pipe for supplying and diluting raw water to strong alkaline water in a cathode chamber side discharge pipe; a chloride salt on one side of a non-diaphragm electrolysis tank A non-diaphragm having a water supply pipe for an aqueous solution, electrolyzing a chloride salt aqueous solution supplied from the water supply pipe, draining it from a discharge pipe, and connecting a dilution water supply pipe for supplying and diluting raw water to the discharge pipe. An electrolytic water conditioner; and an isolated water drainage circuit from an anode chamber side drain circuit of the diaphragm electrolyzer. Is connected to the water circuit of the electrolytic water conditioner device,
A part of strong acid water generated from the diaphragm electrolyzer is supplied to a drainage circuit or a water supply circuit of a non-diaphragm electrolyzer for adjusting pH and concentration of hypochlorous acid. It is also achieved by having.

In order to achieve the second object, the apparatus according to the present invention is the same as the above-mentioned apparatus, except that a branch drain pipe is provided from the anode chamber side discharge pipe via a switching valve.

In order to achieve the third object, the apparatus of the present invention is further characterized in that a device for reducing hypochlorous acid and chlorine gas is provided in the branch drain pipe of the anode chamber side discharge pipe. . In this reduction device, for example, a hydrogen gas supply pipe is connected to a reaction tank provided in the path of the strong acid water, and a catalyst is installed in the reaction tank or in the vicinity of the reaction tank. A hydrogen gas reaction-reduction device that generates hypochlorite by reacting hypochlorous acid and chlorine gas with hydrogen gas, disposing an ultraviolet lamp and a catalyst in a water tank that receives the strong acid water, and circulating the water in the water tank. An ultraviolet reduction device that generates hypochlorous acid and chlorine gas into hydrochloric acid by a contact reaction between ultraviolet energy and water spray under a catalyst, There is, for example, a reducing agent added with a chemical solution that generates hypochlorous acid and chlorine gas in strongly acidic water into hydrochloric acid with a reducing agent supplied from the agent supplying means, and these reducing devices may be combined.

In the case where a hydrogen gas reaction reduction device is used in which hypochlorous acid and chlorine gas in strongly acidic water are reacted with hydrogen gas to generate hydrochloric acid, hydrogen gas of strongly alkaline water is connected to the discharge pipe on the cathode chamber side. It is desirable to provide a gas separation section and to connect a hydrogen gas supply pipe of the hydrogen gas reaction reduction device from the hydrogen gas separation section.

In order to achieve the fourth object, the apparatus of the present invention further has the following configuration. That is, in the apparatus using only the diaphragm electrolyzer, a raw water supply pipe is connected from the dilution water supply pipe to the water supply side of the diaphragm electrolyzer, and the dilution water supply pipe and the water supply pipe circuit are alternatively selected. A channel switching means for opening and closing is provided. On the other hand, in the above-mentioned apparatus using both a diaphragm electrolyzer and a non-diaphragm electrolyzer, a raw water supply pipe is connected to each of a water supply side of the diaphragm electrolyzer and a water supply side of the diaphragmless electrolyzer. The diluting water supply pipe of the diaphragm electrolyzer and the diluting water supply on the discharge side of the non-diaphragm electrolytic cell are led from a common raw water supply main pipe, and an opening / closing control valve selectively operated for these raw water supply pipe and dilution water supply pipe Provide a mechanism.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The apparatus of the present invention employs a diaphragm electrolyzer 1 in which a cathode electrode 5 and an anode chamber 6 are partitioned by an electrolytic diaphragm 4 between a negative electrode 2 and a positive electrode 3 which are arranged to face each other. The diaphragm electrolyzer 1 has a water supply pipe circuit 7 for supplying raw water such as tap water and a chloride salt solution such as sodium chloride to a lower water supply section, and a cathode chamber side discharge pipe 8 and an anode chamber side discharge pipe at the upper part. It has a pipe 9 and constitutes a continuous water flow type electrolysis apparatus as a whole.

A water supply pipe circuit 7 shown in FIG. 1 for supplying an aqueous solution of a chloride salt such as sodium chloride to a water supply port of the diaphragm electrolyzer 1.
Is a pipe 11 branched from a raw water supply main pipe 10, a tank 12 for producing a chloride salt aqueous solution by mixing a part of raw water supplied from the pipe 11 with a chloride salt,
A tank 13 for mixing a part of the water from the pipe line 11 with the aqueous chloride salt solution 2 to adjust the aqueous solution to 1 to 5%, preferably 2 to 3% chloride salt aqueous solution; Tank 1
And a flow rate adjusting valve 16 for supplying a chloride salt aqueous solution adjusted to a predetermined concentration.
Is supplied to the electrode chambers 5 and 6 of the diaphragm electrolyzer 1 through the electrodes.

The electrolysis apparatus configured as described above electrolyzes the chloride salt aqueous solution supplied from the water supply pipe circuit 7 in the electrolysis tank 1, generates strong alkaline water having a pH of 11 or more in the cathode chamber 5, In addition to the discharge from the discharge pipe 8, strongly acidic water containing hypochlorous acid and chlorine gas is generated in the anode chamber 6 and sent out through the discharge pipe 9 on the anode chamber side. Although not shown, the cathode chamber side discharge pipe 8 and the anode chamber side discharge pipe 9 may be provided with flow rate adjusting means such as a flow valve.

A diluted water supply pipe 17a for diluting and increasing the strong alkaline water of the discharge pipe 8 is provided in the cathode chamber side discharge pipe 8.
Is connected via a flow control valve 18 and a flow switch 19, and the pH 11 is adjusted by mixing raw water from the dilution water supply pipe 17 a with strong alkaline water in the cathode chamber side discharge pipe 8.
The pH is adjusted to １３13.5, and the increased amount of strong alkaline water is discharged.

On the other hand, a dilution water supply pipe 17b is similarly connected to the anode chamber side discharge pipe 9 via a flow control valve 20 and a flow switch 21, and the hypochlorous acid sent out from the anode chamber side discharge pipe 9 is similarly connected. -Strongly acidic water containing chlorine gas and water supplied from the dilution water supply pipe 17b are mixed. In this case, the strong acid water and the dilution water are mixed by reacting the chlorine gas in the strong acid water with the dilution water to form hypochlorous acid (H
ClO) is generated, the amount of hypochlorous acid in the water is increased, and the strongly acidic water is diluted and increased to a pH of 3 to 8,
This is to make the aqueous solution of hypochlorous acid having a concentration of 2 to 200 ppm. Therefore, the downstream side of the connection between the anode chamber side discharge pipe 9 and the dilution water supply pipe 17b is a hypochlorous acid water drainage pipe having a pH of 3 to 8 and a concentration of 2 to 200 ppm.

In the embodiment shown in the figure, the dilution water supply pipe 17a for strong alkaline water and the dilution water supply pipe 17b for strong acid water are formed by bifurcating the dilution water main pipe 17 branched from the water supply main pipe 10. . The flow switches 19 and 21 provided in the dilution water supply pipes 17a and 17b detect the flow of water and are used as an electrolysis ON / OFF control signal for the electrolytic cell 1.

In the embodiment shown in FIG. 1, a predetermined concentration of a chloride salt aqueous solution supplied from the water supply pipe circuit 7 is supplied to the diaphragm electrolyzer 1 and electrolyzed by the above-described configuration, whereby the cathode chamber side discharge pipe is provided. The strong alkaline water having a pH of 10.5 or more is discharged from 8 and the raw water from the dilution water supply pipe 17a is mixed with the strong alkaline water to adjust to a strong alkaline water having a pH of 10.5 to 13.5. Strongly acidic water is discharged from the anode chamber side discharge pipe 9, and raw water from the dilution water supply pipe 17b is mixed with the strongly acidic water to discharge hypochlorite sterilized water having a pH of 3 to 8. The concentration of the hypochlorous acid sterilizing water is preferably 2 to 2 depending on the mixing amount of the aqueous chloride solution or the dilution water.
Adjust to 00 ppm.

In the present invention, the raw water is diluted with the water in the discharge pipe 9 on the anode chamber side to produce sterilized hypochlorous acid water having a pH of 3 to 8. A part of the strong alkaline water before or after dilution is mixed with the water before or after mixing the dilution water of the anode chamber side discharge pipe 9 to finally adjust the pH of the hypochlorite water to pH 3 to 8. It may be adjusted.
For this reason, in the embodiment of FIG. 1, a strong alkali water tank 22 is interposed in the diluted cathode chamber side discharge pipe 8 ′, and the pipe line 2 is connected from the tank 22 to the diluted anode chamber side discharge pipe 9 ′.
3 is connected, and a part of the strong alkaline water is mixed with the diluted water of the anode chamber side discharge pipe 9 ′ by the pump 24.

The water discharged from the anode chamber side discharge pipe 9 is pH
When is low, it contains chlorine gas. For this reason, in the embodiment of FIG. 1, a gas absorption tank 25 is interposed in the anode chamber side discharge pipe 9 after dilution. As a preferred embodiment, a hypochlorous acid concentration detector 26 is provided in the anode chamber side discharge pipe 9 '.

A predetermined amount of the strongly acidic water discharged from the anode chamber side discharge pipe 9 is mixed with a predetermined amount of dilution water to obtain a desired p-water.
H and the desired flow rate are produced in the hypochlorous acid sterilized water, and the strongly acidic water required for this may be a part of the amount produced from the anode chamber 6, and in this case, the remaining amount may be sufficient. Strongly acidic water must be drained out of the system. For this reason, in the illustrated apparatus, as a more preferred embodiment, the anode chamber side drain pipe 9
A branch drain pipe 27 for draining part of the strongly acidic water out of the system is provided. The branch drain pipe 27 is branched from the anode chamber drain pipe 9 via a switching valve 28.

Since the strongly acidic water drained from the branch drain pipe 27 contains hypochlorous acid and chlorine gas, it is not preferable to drain it as it is. Therefore, still another embodiment of the present invention relates to a system of a branch drain pipe 27, in which a strong acid water passing through the branch drain pipe 27, or hypochlorous acid and chlorine gas discharged from the branch drain pipe 27 is added. A reducing device 29 is provided for reducing and converting to hydrochloric acid.

As a preferred first embodiment of the reducing device 29 (reducing device 29a), as shown in FIG. 2, a reaction tank 30 is provided in a pipe through which strongly acidic water passes (a branch drain pipe 27 in the illustrated embodiment).
And a catalyst 31 of a platinum group or the like, and a hydrogen gas supply pipe 32 for sending hydrogen gas to the reaction tank 30 is connected. Hypochlorous acid and chlorine gas in strongly acidic water in the presence of the catalyst are provided. Is reacted with hydrogen gas from the hydrogen gas supply pipe 32 to reduce hypochlorous acid and chlorine gas and to oxidize them. That is, hypochlorous acid (HClO) and chlorine gas (Cl ₂ ) in the strongly acidic water are converted to hydrogen gas (H ₂ ).
To form hydrochloric acid (HCl).

The cathode chamber side discharge pipe 8 of the device according to the present invention
Since the hydrogen gas is contained in the strong alkaline water passing through, more preferably, the cathode chamber side discharge pipe 8 is provided with a hydrogen gas separation part 33 for taking out the hydrogen gas in the strong alkaline water, and the hydrogen gas separation part is provided. A hydrogen gas supply pipe 32 is piped from 33 to the reaction tank 30, and is sent in via a pump 34 using hydrogen gas in strong alkaline water. This configuration is reasonable because hydrogen gas for reduction can be self-supplied.

As shown in FIG. 2, the second preferred embodiment of the reducing device 29 (reducing device 29b) is to store platinum in the vicinity of an ultraviolet lamp 36 in a water storage tank 35 for receiving strongly acidic water from a branch drain pipe 27. An ultraviolet irradiation device 38 surrounded by a cover of a catalyst 37 such as an aromatic group is provided.
A circulation path 39 for circulating the water in the water storage tank 35 through 8 and discharging the water in the form of a mist (shower) from above the water surface is provided.

When the strong acid water is irradiated with ultraviolet light, the energy of the ultraviolet light under the catalyst 37 reduces the hypochlorous acid in the strong acid to convert it into hydrochloric acid. After dissolving in the liquid by the shower water discharge of 39 to become hypochlorous acid, as described above, it is reduced by the ultraviolet energy under the catalyst 37,
It becomes hydrochloric acid. In this case, water may be supplied from the water supply pipe 40 to the water storage tank 35 in order to efficiently dissolve the chlorine gas into the liquid. As shown by the broken line in the figure, this water supply pipe 40 may be connected from the raw water supply main pipe 10 of the apparatus of the present invention. Further, a gas venting device 41 using activated carbon or the like may be provided on the upper lid of the water storage tank 35 to discharge the gas from which the chlorine component has been removed to the outside. In the figure, reference numeral 42 is a water level sensor.

Another embodiment of the reduction device 29 (reduction device 29
As c), a device that sends a reducing agent aqueous solution 43 such as L-ascorbic acid, ethyl alcohol, methyl alcohol or the like by a pump and adds it to the water to be treated for reduction or sprays it in a shower may be used. Also. The reducing agent aqueous solution 43 may be mixed with the treated water in the water storage tank 35, or may be added to the water in the drain pipe 44 of the water storage tank 35 as shown in the figure.

Each of the above reduction devices 29a, 29b, 29c
May be used alone or in combination of two or more. The embodiment of FIG. 2 combines the above three types of reducing devices 29a, 29b, and 29c. In this case, the reducing agent aqueous solution 43 is added to the water reduced by the first and second reducing devices 29a and 29b. The reaction tank 30 and the catalyst 31 of the first reduction device 29a may be interposed in the circulation path 39 of the water storage tank 35. FIG. 1 and FIG.
2. The reduction devices 29a, 29b, 29c similar to FIG.
May be used.

The embodiment shown in FIGS. 1 and 2 shows a raw water supply main pipe 1.
A part of the raw water from 0 is electrolyzed into a high-concentration chloride salt aqueous solution, and the generated strong alkaline water and strong acid water are diluted with the raw water from the raw water supply main pipe 10. The entire amount of the raw water in the tube 10 is converted into a relatively low-concentration chloride salt aqueous solution for electrolysis, and strong alkaline water having a pH of 10.5 to 13.5 is discharged from the cathode chamber side discharge pipe 5 without diluting the generated electrolytic water. Then, hypochlorite sterilized water having a pH of 3 to 8 can be discharged from the anode chamber side discharge pipe 6.

Therefore, the switching valve 4 is connected to the dilution water supply pipe 17.
The pipe 46 is connected to the water supply side of the diaphragm electrolyzer 1 via the pipe 5, and the raw water flowing to the dilution water supply pipe 17 by the switching operation of the switching valve 45 flows to the water supply side of the diaphragm electrolyzer 1, 1
The entire amount of raw water from 0 is electrolyzed in the diaphragm electrolyzer 1 as a chloride salt aqueous solution. This line 46 is preferably provided with a flow control valve 47 and a flow switch 48.

FIG. 3 shows an apparatus according to the seventh and eighth embodiments of the present invention, wherein the same reference symbols as those in FIGS. 1 and 2 indicate the same members. This is a diaphragm electrolyzer 1
, A continuous flow type isolated membrane electrolysis apparatus 1 having a chloride salt aqueous solution supply pipe circuit 7 on one side and a cathode chamber side discharge pipe 8 and an anode chamber side discharge pipe 9 on the other side; A continuous flow type non-diaphragm electrolysis device 52 having a water supply pipe 50 of a chloride salt aqueous solution on one side of the electrolytic cell 49 and an electrolytic water discharge pipe 51 on the other side is provided.

The cathode chamber side discharge pipe 8 of the diaphragm electrolysis water conditioning apparatus 1
Is connected to a dilution water supply pipe 17a in the same manner as described above, and the strong alkaline water drained from the cathode chamber side discharge pipe 8 is diluted with raw water supplied from the dilution water supply pipe 17a to adjust the pH to 1.
It is adjusted to a strong alkaline water of 0.5 to 13.5. In FIG. 3, a dilution water supply pipe 17b is also connected to the anode chamber side discharge pipe 9 in the same manner as described above, but this is not necessarily essential.

On the other hand, a diluting water supply pipe 17c is connected to the electrolyzed water discharge pipe 51 of the diaphragmless electrolysis water conditioning apparatus 52, and the hypochlorous acid water generated in the diaphragmless electrolysis tank 49 is diluted with raw water. It has become.

The apparatus of the embodiment shown in FIG. 3 further includes the strongly acidic water drained from the discharge pipe 9 on the anode chamber side of the membrane electrolyzed water conditioning apparatus 1, and the water circuit of the non-isolated electrolysis water conditioning apparatus 52,
By supplying and mixing the discharge pipe 51 from the non-diaphragm electrolytic cell 49 or the water supply pipe 50 to the non-diaphragm electrolytic cell 49, the electrolytically treated water drained from the non-diaphragm electrolytic cell 49 has a pH of 3 to 8.
The hypochlorous acid sterilizing water is adjusted to a predetermined value (2-200 pp).
m) is provided with a pH / concentration adjusting tube 53 for adjustment.

For this reason, in FIG. 3, the pH / concentration adjusting pipe 53 is connected from the discharge pipe 9 on the anode chamber side to the discharge pipe 51 of the non-diaphragm electrolytic water conditioning apparatus 52. This pH / concentration adjusting tube 53
May be a pipeline for supplying an appropriate amount of strong acid water stored in the tank 70 via the metering pump 55 as shown in FIG.
A pipe that supplies the water flowing through the anode chamber side discharge pipe 9 using the switching valve 54 and the pH / concentration adjustment pipe 53 may be used. Of course, both may be used together as shown in FIG. Although not shown, the pH / concentration adjusting tube 53 is not limited to the case where the pH / concentration adjusting tube 53 is connected to the drain pipe 51 of the diaphragm-free electrolytic cell 49.
The appropriate amount of the strong acidic water in the diaphragm electrolyzer 1 is added to the aqueous chloride salt solution supplied to the diaphragm-free electrolyzer 49, and the drainage from the diaphragmless electrolyzer 49 is performed. The pH and concentration of the aqueous chlorite solution may be adjusted.

In the apparatus of the embodiment shown in FIG. 3, similarly to the apparatus shown in FIGS. 1 and 2, usually a high-concentration aqueous chloride salt solution is electrolyzed, and the water in the raw water supply main pipe 10 is diluted with the electrolyzed water. Desired pH
If necessary, the entire amount of the raw water in the raw water supply main pipe 10 is supplied together with an aqueous chloride salt solution to perform electrolysis, and the desired strong alkaline water and hypochlorous water are diluted without diluting the water after the electrolysis. It is configured so that chloric acid sterilizing water can be generated.

For this reason, the apparatus shown in FIG. 3 is provided with raw water supply water from the main water supply pipe 10 common to the dilution water supply pipes 17a, 17b and 17c to the respective water supply sides of the diaphragm electrolyzer 1 and the non-diaphragm electrolyzer 49. The pipes 55, 56 are connected, and the raw water supply pipes 55, 56 and the dilution water supply pipes 17a, 17b,
Each of the opening / closing control valve mechanisms 57, 58, 59, 60, and 61 selectively opens and closes. In the embodiment of FIG. 3, these opening / closing control valve mechanisms 57 to 61 are illustrated as solenoid valves, but the invention is not limited to this.

Thus, the open / close control valve mechanisms 57, 58 of the raw water supply pipes 55, 56 are closed, and the dilution water supply pipes 17a, 17
When the opening / closing control valve mechanisms 59, 60, 61 of b, 17c are opened, a high concentration aqueous chloride salt solution is electrolyzed in the diaphragm electrolyzer and the non-diaphragm electrolyzer, and each electrolyzed water is diluted with the dilution water supply pipe 17a, 1
Diluted with raw water from 7b, 17c.

On the other hand, the open / close control valve mechanisms 57, 58 of the raw water supply pipes 55, 56 are opened, and the dilution water supply pipes 17a, 17b,
When the opening / closing control valve mechanisms 59, 60, 61 of 17c are closed, the electrolyzed water is not diluted, and the entire amount of water in the water supply main pipe 10 is mixed with the chloride salt aqueous solution to be electrolyzed.

Similarly, each of the opening / closing control valve mechanisms 57-
By combining the opening and closing control of 61, for example, for the non-diaphragm electrolytic cell 49, the water of the raw water supply pipe 56 is combined with the aqueous solution of chloride salt for electrolysis, and the electrolyzed water is not diluted.
The diaphragm electrolyzer 1 is capable of performing various types of electrolytic water adjustment operations, such as electrolyzing a high-concentration chloride salt aqueous solution to dilute only strong alkaline water. The raw water supply pipe 56 and the dilution water supply pipe 17c
Can be used as switches for controlling ON / OFF of the diaphragm-free electrolytic cell 49.

The diaphragm electrolyzer 1 of FIGS. 1 and 2 shows an electrolyzer of the type in which the polarity of the electrode is reversed to perform reverse electrolysis in order to dissolve and wash calcium deposited in the cathode chamber 5.
For this reason, the junction pipe 65 is connected from the cathode chamber side discharge pipe 8 to the anode chamber side discharge pipe 9 via the switching valve 64, and the drainage drained from the branch drain pipe 27 to the drain 67 via the switching valve 66. A conduit 68 is provided. Therefore, the switching valve 64
The cathode chamber side discharge pipe 8 communicates with the anode chamber side discharge pipe 9 via the switching valve 28, the anode chamber side discharge pipe 9 communicates with the branch drainage 27 via the switching valve 28, and the drain 67 via the switching valve 66. When it is connected to the drain, all the washing water of the electrolytic cell 1 is drained to the drain 67.

On the other hand, the diaphragm electrolyzer 1 of FIG. 3 dissolves and cleans the precipitated calcium by inverting the polarity of the electrode at predetermined time intervals and performing electrolytic water adjustment. A flow path switching valve device which switches between the cathode chamber side discharge pipe 8 and the anode chamber side discharge pipe 9 in conjunction with the polarity change of the electrodes so that the change does not affect the discharge pipes of the strong alkaline water and the strong acid water. 69 are provided. As for the washing water circuit, the structure of the apparatus of FIG. 3 may be applied to the apparatus of FIGS. 1 and 2, or the structure of the apparatus of FIGS. 1 and 2 may be applied to the apparatus of FIG.

In the figure, symbol P indicates a metering pump, M indicates a motor valve, and SOL indicates a solenoid valve.

[0046]

The apparatus of the present invention simultaneously produces strong alkaline water having a pH of 10.5 to 13.5 and hypochlorous acid water having a pH of 3 to 8 and a concentration of 2 to 200 ppm in an integrated apparatus. In addition, it is easy to adjust the density. In particular, as in the case of washing and disinfecting tableware, it is extremely useful as a water supply device when strong alkaline water and hypochlorous acid water are required at the same time, and those that can also generate strong acid water at the same time, It can be used to neutralize strong alkaline water used for washing.

Since a relatively small amount of a high-concentration chloride salt aqueous solution is electrolyzed to generate strongly alkaline water and hypochlorous acid water, and the amount of strong alkaline water and hypochlorous acid water is increased by mixing dilution water, It is sufficient that the electrolytic cell has a relatively small capacity, and the cost can be reduced. Further, the pH and concentration can be finely adjusted by adjusting the mixing of the dilution water. Further, since the high-concentration aqueous solution is electrolyzed, the conductivity is increased, and the electrolysis efficiency is significantly improved.

Further, since the pH, concentration and the like can be adjusted by using the water conventionally discarded to the drain, waste water is reduced, and the adjustment of pH and concentration is further facilitated.

The excess strongly acidic water is safe because it is reduced to hydrochloric acid.

The apparatus can be selectively used for electrolysis of a high-concentration aqueous solution and electrolysis of the entire amount of raw water, so that various uses can be made according to the purpose.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electrolysis tank 2 ... Negative electrode 3 ... Positive electrode 4 ... Electrolysis diaphragm 5 ... Cathode chamber 6 ... Anode chamber 7 ... Water supply pipe circuit 8, 8 '... Cathode chamber side discharge path 9, 9' ... Anode chamber side discharge path 10 ... Main water supply main pipe 11 ... Pipe 12 ... Tank 13 ... Tank 14 ... Pipe 15 ... Metering pump 16 ... Flow rate ratio adjusting valve 17a, 17b, 17c ... Dilution water feed pipe 18,20 ... Flow control valve 19,21 ... Flow switch 22 ... Strong alkaline water tank 23 ... Pipe line 24 ... Pump 25 ... Gas absorption tank 26 ... Concentration detecting device 27 ... Branch drainage pipe 28 ... Switching valve 29,29a, 29b, 29c ... Reducing device 30 ... Reaction tank 31 ... Catalyst 32: Hydrogen gas supply pipe 33: Hydrogen gas separation unit 34 ... Pump 35 ... Water tank 36 ... Ultraviolet light 37 ... Catalyst 38 ... Ultraviolet irradiation device 39 ... Circulation path 40 ... Water supply pipe 41 ... Gas release device 42 ... Water level sensor A 43: reducing agent aqueous solution 44 ... drain pipe 45 ... switching valve 46 ... pipe line 47 ... flow control valve 48 ... flow switch 49 ... non-diaphragm electrolytic cell 50 ... water supply pipe 51 ... electrolyzed water discharge pipe 52 ... non-diaphragm electrolysis water conditioning Device 53: pH / concentration adjusting pipe 54: Switching valve 55, 56 ... Raw water supply pipe 57-61 ... Opening / closing control valve mechanism 62, 63 ... Flow switch 64, 66 ... Switching valve 65 ... Confluence line 67 ... Drain 68 ... Drainage Pipe line 69: flow path switching device 70: strong alkaline water tank

Claims (8)

[Claims] 1. A water supply circuit for a chloride salt aqueous solution is provided on one side of a diaphragm electrolytic cell partitioned into a cathode chamber and an anode chamber via an electrolytic diaphragm, and a cathode chamber side discharge pipe and an anode chamber side are provided on the other side. It has a discharge pipe, electrolyzes the chloride salt aqueous solution supplied from the water supply pipe circuit, discharges strong alkaline water from the cathode chamber side discharge pipe, and strong acid containing hypochlorous acid and chlorine gas from the anode chamber side discharge pipe. Separation membrane electrolyzer for discharging neutral water; Dilution water supply pipe for supplying and diluting raw water to strongly alkaline water in the discharge pipe on the cathode chamber side; Supplying and diluting raw water for strongly acidic water in the discharge pipe on the anode chamber side And an apparatus for simultaneously producing strongly alkaline water and hypochlorous acid sterilized water by electrolysis, comprising: 2. A raw water supply pipe is connected from a dilution water supply pipe to a water supply side of a diaphragm electrolyzer, and flow path switching means for selectively opening and closing the dilution water supply pipe and the water supply pipe circuit is provided. An apparatus for simultaneously producing strongly alkaline water and hypochlorous acid sterilized water by electrolysis according to claim 1. 3. A separated electrolytic cell separated into a cathode chamber and an anode chamber through an electrolytic diaphragm has a water supply pipe circuit for a chloride salt aqueous solution on one side and a cathode chamber side discharge pipe and an anode chamber side on the other side. It has a discharge pipe, electrolyzes the chloride salt aqueous solution supplied from the water supply pipe circuit, discharges strong alkaline water from the cathode chamber side discharge pipe, and strong acid containing hypochlorous acid and chlorine gas from the anode chamber side discharge pipe. A dilute water supply pipe for supplying and diluting raw water to strong alkaline water in a cathode chamber side discharge pipe; and a chloride salt aqueous solution supply pipe on one side of a non-diaphragm electrolytic cell. A non-diaphragm electrolysis water conditioning device having a diluting water supply pipe connected to a diluting water supply pipe for supplying and diluting raw water to the discharge pipe while electrolyzing a chloride salt aqueous solution supplied from the water supply pipe and draining the same from the discharge pipe. ;
A part of the strong acid water generated from the diaphragm electrolyzer is connected to the water circuit of the diaphragm-free electrolysis water conditioning device from the anode chamber side drain circuit of the diaphragm electrolysis device, and is discharged from the diaphragm-free electrolysis water conditioning device. Simultaneous generation apparatus of strong alkaline water and hypochlorous acid water by electrolysis, comprising: a pH / concentration adjusting pipe for adjusting pH and hypochlorous acid concentration by supplying to a circuit or a water supply circuit. 4. A raw water supply pipe is connected to a water supply side of the diaphragm electrolyzer and a water supply side of the non-diaphragm electrolysis tank, respectively. 4. An electrolysis system according to claim 3, wherein the discharge water supply on the discharge side is led from a common raw water supply main pipe, and the raw water supply pipe and the dilution water supply pipe are provided with an opening / closing control valve mechanism selectively operated. Simultaneous generator of strong alkaline water and hypochlorous acid water 5. A branch drain pipe branched from the anode chamber side discharge pipe via a switching valve, and draining part or all of the strongly acidic water of the anode chamber side discharge pipe to the outside of the system. An apparatus for simultaneously producing strongly alkaline water and hypochlorous acid sterilized water by electrolysis according to claim 1, 2, 3, or 4. 6. The electrolysis according to claim 1, wherein a reduction device for hypochlorous acid and chlorine gas is provided in the branch drainage pipe of the anode chamber side discharge pipe. Simultaneous generator of strong alkaline water and hypochlorous acid water 7. A reducing device connects a hydrogen gas supply pipe to a reaction tank provided in the path of the strong acid water, installs a catalyst in the reaction tank or in the vicinity of the reaction tank, and places the catalyst in the strong acid water under the catalyst. A hydrogen gas reaction-reduction device for generating hypochlorite by reacting hypochlorous acid and chlorine gas with hydrogen gas; and disposing an ultraviolet lamp and a catalyst in a water tank for receiving the strongly acidic water,
It has a circulation path that circulates the water in the water tank and discharges it in the form of a shower from the upper part of the water tank, thereby converting hypochlorous acid and chlorine gas to hydrochloric acid by contact reaction between ultraviolet energy and water spray under the catalyst. One or a combination of two or more of: an ultraviolet reduction device to be generated; and a chemical addition reduction device that generates hypochlorous acid and chlorine gas in strong acid water into hydrochloric acid with a reducing agent supplied from a reducing agent supply unit. An apparatus for simultaneously producing strongly alkaline water and hypochlorous acid water according to claim 6. 8. A hydrogen gas separation section for a strong alkaline water is provided in a cathode chamber side discharge pipe, and a hydrogen gas supply pipe of the hydrogen gas reaction and reduction apparatus is piped from the hydrogen gas separation section. Item 7. Simultaneous generation apparatus of strongly alkaline water and hypochlorous acid water according to Item 7.