JPH09117765A - Electrolyzed water forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously form a strongly acidic hypochlorous acid aq. soln. and a strongly alkaline hypochlorous acid aq. soln. in an electrolyzing of a dilute common salt. SOLUTION: A first and second electrodes 13a and 13b are disposed at a first electrode chamber 15a formed by dividing an electrolytic cell 11 with a diaphragm 12, and a third electrode 13c is disposed at a second electrode chamber 15b, and the first electrode 13a is used as a cathode and the second electrode 13b and the third electrode 13c are used as anodes. Then, the device is constituted of a first electrolyzing situation of the common salt between the first electrode 13a and the second electrode 13b and a second electrolyzing situation of the common salt between the first electrode 13a and the third electrode 13c so that the strongly alkaline hypochlorous acid aq. soln. may be formed in the first electrode chamber 15a and the strongly acidic hypochlorous acid aq. soln. may be formed in the second electrode chamber 15b.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electrolyzed water producing apparatus for producing electrolyzed water containing hypochlorous acid, sodium hypochlorite and the like and having a sterilizing action and a disinfecting action.

[0002]

2. Description of the Related Art As one type of electrolyzed water producing apparatus for producing electrolyzed water containing hypochlorous acid, sodium hypochlorite and the like and having a sterilizing action and a disinfecting action, Japanese Patent Publication No. 4-420.
As disclosed in Japanese Patent Publication No. 77, the electrodes are arranged in a pair of compartments formed by partitioning the inside of the electrolytic cell with a diaphragm having ion permeability to form an anode compartment and a cathode compartment, There is an electrolyzed water generator that electrolyzes the dilute salt solution supplied to both electrode chambers between both electrodes. In the electrolyzed water producing apparatus, acidic water containing hypochlorous acid is produced in the anode chamber and alkaline water is produced in the cathode chamber.

[0003]

By the way, in the electrolyzed water producing apparatus, a strong acidic hypochlorous acid aqueous solution can be produced in the anode chamber, and a strongly alkaline alkaline aqueous solution can be produced in the cathode chamber. can do. However, since such an alkaline aqueous solution contains almost no hypochlorous acid, it has no bactericidal action or disinfecting action.

Therefore, it is an object of the present invention to simultaneously produce a strongly acidic hypochlorous acid aqueous solution and a strongly alkaline hypochlorous acid aqueous solution.

[0005]

An electrolyzed water producing apparatus according to the present invention is provided with an electrolyzer and the electrolyzer is divided into a first electrode chamber and a second electrode chamber. A diaphragm having ion permeability, a first electrode and a second electrode arranged in parallel in the first electrode chamber and facing each other, and arranged in parallel in the second electrode chamber with both electrodes. In the electrolyzed water generation device including a third electrode, the first electrode that is located apart from the diaphragm in the first electrode chamber is configured as a cathode, and is close to the diaphragm in the first electrode. The second electrode and the third electrode positioned are configured as an anode, and a first electrolysis mode of saline solution between the first electrode and the second electrode and between the first electrode and the third electrode And a second electrolysis mode of saline solution.

In the electrolyzed water generator, one DC power source is adopted as a power source, the first electrode is connected to the negative electrode side of the DC power source, and the second electrode is connected to the positive electrode side of the DC power source.
It is preferable to connect the electrode and the third electrode.

[0007]

In the electrolyzed water producing apparatus having such a structure, salt water as electrolyzed water is supplied to both electrode chambers for electrolysis, and the first electrode serves as the cathode in the first electrode chamber and A first electrolysis mode is performed in which the second electrode serves as an anode,
At the same time, a second electrolysis mode in which the first electrode serves as a cathode and the third electrode serves as an anode is performed between the two electrode chambers.

In the first electrolysis mode, however, a weakly alkaline hypochlorous acid aqueous solution is generated in the first electrode chamber. In the second electrolysis mode, a strongly acidic hypochlorous acid aqueous solution is generated in the second electrode chamber.
Sodium ions in the electrode chamber pass through the diaphragm and move to the first electrode chamber. As a result, the electrolyzed water in the first electrode chamber becomes a strong alkaline hypochlorous acid aqueous solution.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 schematically shows an example of an electrolyzed water producing apparatus according to the present invention. The electrolyzed water producing apparatus includes an electrolyzer 11, a diaphragm 12, first, second and third electrodes 13a, 13
b, 13c and a DC power supply 14. The diaphragm 12 is an ion-exchange membrane having ion permeability, and is disposed at a substantially central portion of the electrolytic cell 11 so that the inside of the electrolytic cell 11 is in the first electrode chamber 15a.
And the second electrode chamber 15b.

In the electrolytic cell 11, the first electrode chamber 15a
And saline solution supply conduits 11a, 11b connected to the second electrode chamber 15b, and electrolytic product water outflow conduits 11c, 11d respectively connected to the two electrode chambers 15a, 15b. There is. Each supply line 11a,
Reference numeral 11b is connected to a storage tank 16 for dilute saline, and by opening the flow rate adjusting valves 17a, 17b and driving the supply pump 17c, the electrode chambers 15a, 1b are opened.
It is configured such that a dilute salt solution is supplied to the inside of 5b. Reference numeral 17d in the drawing is a water valve for intermittently supplying tap water to the storage tank 16.

In each of the electrode chambers 15a and 15b, the first
The first electrode 13a and the second electrode 13b are arranged in the electrode chamber 15a, and the third electrode 13c is arranged in the second electrode chamber 15b. The first electrode 13a and the third electrode 13c are formed by plating a titanium plate with platinum, and the second electrode 13b is formed by plating a titanium plate-like lath metal with platinum. It is a thing. First
The electrode 13a is located apart from the diaphragm 12 in the first electrode chamber 15a, and the second electrode 13b is located close to the diaphragm 12, and these electrodes 13a and 13b are parallel to each other. Are facing each other. The third electrode 13c is located in the second electrode chamber 15b so as to be separated from the diaphragm 12, and is parallel to the electrodes 13a and 13b with the diaphragm 12 interposed therebetween.

The first electrode 13a is connected to the negative side of the DC power supply 14, and the second electrode 13b is connected to the same power supply 14
Connected to the positive electrode side of the
Is connected to the positive electrode side of. Therefore, the first electrode 13a is configured as a cathode, and the second electrode 13b and the third electrode 1 are formed.
3c is an anode. Thereby, in the electrolyzed water producing apparatus, the first electrode 13a serves as a cathode and the second electrode 13b serves as an anode in the first electrode chamber 15a.
The electrolysis mode is performed, and at the same time, the second electrolysis mode is performed between the two electrode chambers 15a and 15b in which the first electrode 13a serves as a cathode and the third electrode 13c serves as an anode.

In the electrolyzed water producing apparatus thus constructed, the storage tank 16 is driven by driving the supply pump 17c.
The dilute salt solution inside is supplied to both the electrode chambers 15a and 15b through the supply pipe lines 11a and 11b, respectively.
The electrolyzed water in the electrode chambers 15a and 15b is electrolyzed in 5b and flows out through the outflow conduits 11c and 11d.

In the first electrode chamber 15a, therefore, a first electrolysis mode is performed in which the first electrode 13a serves as a cathode and the second electrode 13b serves as an anode, and at the same time, the first electrode 13a is provided between the two electrode chambers 15a and 15b. Is used as a cathode and the third electrode 13c is used as an anode. The first electrolysis mode is electrolysis using a diaphragmless method, and in the electrolysis mode, a weakly alkaline hypochlorous acid aqueous solution is generated in the first electrode chamber 15a. On the other hand, the second electrolysis mode is a diaphragm method electrolysis, and in the electrolysis mode, a strongly acidic hypochlorous acid aqueous solution is generated in the second electrode chamber 15b. In this second electrolysis mode,
Sodium ions in the second electrode chamber 15b pass through the diaphragm 12 and move to the first electrode chamber 15a. As a result, the electrolyzed water in the first electrode chamber 15a becomes a strong alkaline hypochlorous acid aqueous solution.

An electrolysis experiment was conducted using the electrolyzed water producing apparatus. In the electrolysis experiment, a dilute saline solution having a concentration of 0.2% by weight was adopted as the electrolyzed water, the outflow rate from each of the electrode chambers 15a and 15b was 2 l / min, the first electrode 13a and the second electrode 1 were used.
3b voltage 6.5V, current 24.5A, first electrode 13
The voltage was 0.3 V between a and the third electrode 13c, and the current was 5.5 A. As a result, the pH in the first electrode chamber 15a
11.4, a strongly alkaline hypochlorous acid aqueous solution with a chlorine concentration of 41 mg / l is produced, and a strongly acidic hypochlorous acid aqueous solution with a pH of 3.2 and a chlorine concentration of 43 mg / l is produced in the second electrode chamber 15b. Was done.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an example of an electrolyzed water generator according to the present invention.

[Explanation of symbols]

11 ... Electrolyzer, 12 ... Diaphragm, 13a ... 1st electrode, 13b
... second electrode, 13c ... third electrode, 14 ... DC power supply, 15
a ... 1st electrode chamber, 15b ... 2nd electrode chamber.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location C02F 1/76 C02F 1/76 A

Claims (2)

[Claims] 1. An electrolyzer, a diaphragm having ion permeability, which is disposed in the electrolyzer to partition the interior of the electrolyzer into a first electrode chamber and a second electrode chamber, and in the first electrode chamber. A first electrode and a second electrode that are arranged in parallel and face each other;
A third electrode is provided in the second electrode chamber in parallel with the both electrodes, and the first electrode positioned apart from the diaphragm in the first electrode chamber is configured as a cathode, and A second electrode located close to the diaphragm in the one-electrode chamber
An electrode and a third electrode in the second electrode chamber as an anode, and a first electrolysis mode of saline between the first electrode and the second electrode, and between the first electrode and the third electrode 2. An electrolyzed water production apparatus comprising the second electrolysis mode of saline solution according to claim 1. 2. The electrolyzed water generator according to claim 1, wherein one DC power source is used as a power source, the first electrode is connected to the negative electrode side of the DC power source, and the positive electrode of the DC power source is connected. An electrolyzed water production apparatus characterized in that the second electrode and the third electrode are connected to the side.