JP2003126857A - Diaphragm-less cathodic water and anodic water separation-type electrolysis cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolysis cell capable of eliminating the need to provide a diaphragm for partitioning the cell into an anode chamber and a cathode chamber, in an electrolyzing apparatus for electrolyzing a salt solution or the like to provide acidic electrolyzed water having strong sterilizing effect and alkaline electrolyzed water having cleaning effect. SOLUTION: In this electrolysis cell, in order to separate an anode 4 side liquid and a cathode 5 side liquid from each other and to obtain these mutually separated liquids, this electrolysis cell 1 is constructed so that two housing sections 2, 3 in which electrodes are respectively housed, communicate with each other through a liquid junction 16, mounted at a position below the lower end of the electrodes, to secure electric conductivity to the housing sections 2, 3 through the liquids, whereby alkaline electrolyzed water is produced on the cathode 5 side while an acidic electrolyzed solution is produced on the anode 4 side separately from and without mixing with the alkaline electrolyzed water on the cathode 5 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique in which an electrolytic solution is electrolyzed with a direct current to separately obtain an electrolytic solution generated on the anode side and an electrolytic solution generated on the cathode side, without using a diaphragm.

[0002]

2. Description of the Related Art A technique for electrolyzing salt, potassium chloride or the like with a direct current to produce so-called electrolyzed water having sterilizing power is widely known. Such techniques include the method of using a diaphragm type electrolytic cell in which a conductive diaphragm is placed between the cathode and the anode of the electrolytic cell, and the method of using a diaphragmless electrolytic cell in which a diaphragm is not placed. When salt is used as an electrolyte, electrolysis using a diaphragm type electrolytic cell gives an acidic hypochlorous acid solution (hereinafter referred to as "acidic electrolyzed water") from the anode side and sodium hydroxide from the cathode side. An alkaline solution containing the main component (hereinafter referred to as "alkaline electrolyzed water") is obtained. Therefore, the solution obtained from the anode side shows a strong bactericidal effect, and the solution obtained from the cathode side shows a cleaning effect. On the other hand, when a non-diaphragm electrolytic cell is used, only a sodium hypochlorite solution (hereinafter referred to as “electrolyzed hyposulfite”) can be obtained. In terms of sterilizing power,
The acidic electrolyzed water obtained from the anode side of the diaphragm electrolyzer is
It is known to have a much stronger bactericidal effect than electrolytic hypochlorous water obtained in a diaphragmless electrolytic cell. Therefore, when preparing an electrolytic solution using salt or the like as a raw material for the purpose of sterilization, it is advantageous to use a diaphragm-type electrolytic cell, and as so-called sterilized electrolyzed water, a salt solution is electrolyzed using a diaphragm-type electrolytic cell. The technology to do is becoming mainstream.

[0003]

A diaphragm type electrolytic cell used for obtaining acidic electrolyzed water having a strong bactericidal power or alkaline electrolyzed water having a cleaning effect has a solution on the anode side and a solution on the cathode side. To prevent them from being mixed, a septum separating them is required. However, although this diaphragm is conductive, it is the main cause of electric resistance during electrolysis, and it is necessary to raise the electrolysis voltage accordingly, resulting in waste of electric power.
Further, depending on the use time, a scale containing calcium or the like as a main component is deposited on the surface of the film to further increase the electric resistance. However, the more serious problem of the diaphragm type electrolytic cell is the consumption of the membrane. As the electrolysis time increases, the solution is exhausted and the solutions on both sides can no longer be separated. Therefore, it is necessary to disassemble the electrolytic cell at regular electrolysis times and replace it with a new diaphragm.

[0004]

DISCLOSURE OF THE INVENTION In order to separate and separately obtain the liquid on the anode side and the liquid on the cathode side without using a diaphragm, the inventor of the present invention has two electrolytic cells, each containing an electrode. Parts are connected by a liquid junction installed at a position lower than the lower end of the electrode, the liquids contained in the respective accommodating parts meet, and electric conduction is ensured by passing the liquid from one accommodating part to the other accommodating part. With this structure, the alkaline electrolyzed water on the cathode side and the acidic electrolytic solution on the anode side are produced without being mixed, and are separated and obtained. In addition, a structure in which a valve such as a three-way valve is attached to the liquid junction portion is also configured so that the electrolytic solutions generated in the respective storage portions can be easily taken out separately. Furthermore, in order to continuously generate each electrolyte, a water supply unit that can supply a new liquid to the liquid ladle is installed, and a discharge unit is installed above each liquid storage unit in each storage unit. Installed, the liquid continuously supplied from the water supply unit is divided into each storage unit and electrolyzed, and then the electrolyte is discharged from the discharge unit separately for each storage unit, acidic electrolyzed water, alkaline electrolysis It is also a structure in which water is separated and continuously obtained.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The mode of operation of the present invention will be described in detail below with reference to test examples. (Test Example 1) Saturated saline was electrolyzed using the electrolytic cell shown in FIG. The three-way valve 14 is adjusted to a position where the anode chamber 2 and the cathode chamber 3 are connected to each other and the discharge port 15 is blocked, and the three-way valve is set to 50 m each.
Approximately 10 parts of saturated saline solution are placed in the anode chamber and the cathode chamber having a capacity of l.
0 ml was poured. Next, DC power supply 6 OMRON S82
24V, 1A from J-5524 through anode 4 and cathode 5
Was applied and electrolysis was performed for 5 minutes. After stopping the current, adjust the three-way valve so that it connects the anode chamber and the discharge port, collect only the anolyte, and then operate the three-way valve to connect the cathode chamber and the discharge port to collect the cathode water. did. As a result of measuring each characteristic, it was confirmed that acidic electrolyzed water and alkaline electrolyzed water were obtained as shown in the following table. (Test Example 2) Using the apparatus shown in FIG. 2, a test for continuously producing acidic electrolyzed water and alkaline electrolyzed water was conducted. From the saturated saline solution tank 11, the YH1104A01 manufactured by Henmi Co., Ltd. was used to supply saturated saline solution to the electrolytic cell 1 at a flow rate of 30 ml / min, and the saturated saline solution was supplied to the anode chamber and the cathode chamber at 15 ml / min respectively. It was to so. Meanwhile, DC power supply 6 OMRON S82J-552
A current of 24 V and 1.2 A was applied from 4 to obtain an acidic electrolytic solution and an alkaline electrolytic solution from the anode water outlet 7 and the cathode water outlet 8 at 15 ml / min, respectively. The characteristic values of the electrolytic solution are as follows, and it was confirmed that acidic electrolyzed water and alkaline electrolyzed water were continuously obtained. Next, the present invention will be specifically described with reference to examples, but this is for the purpose of facilitating the understanding of the present invention and is not intended to limit the present invention to the following examples. (Embodiment 1) One example of a batch-type non-diaphragm anion / water separation type electrolytic cell of the present invention is shown in FIG. This example is 50 each
It has an anode chamber 3 having the same capacity as the ml-melted anode chamber 2, an anode 4 and a cathode 5 are installed in each, and both electrodes are connected to a DC power supply 6. The anode and cathode can be easily converted by switching the polarity of the power source. The anode and cathode can be easily converted by switching the polarity of the power source. Below each electrode, there is a liquid junction 16 connecting the bipolar chambers,
A three-way valve 14 is installed at the liquid junction. Further, a discharge port for discharging the liquid in the bipolar chamber is installed below the three-way valve. The mode of operation of the electrolytic cell configured in this way is as follows. A three-way valve is connected to the anode tank and the cathode tank, and they are aligned so as to block the outlet, and the electrolyte solution is poured into the bipolar chambers. After electrolysis for 1 constant time, adjust the three-way valve so as to connect one of the tanks and the discharge port, and collect one electrolyte solution,
Connect the other tank to the outlet and collect the other electrolyte. By operating in this manner, it is possible to perform electrolysis without mixing the liquids in the bipolar chambers and separately collect the electrolytes in the bipolar chambers. (Example 2) 17 of Drawing 2 shows an example of the electrolytic cell of the continuous production system of the present invention. In this example, the anode chamber 2 has a volume of 50 ml each.
A cathode chamber 3 is provided, and an anode 4 and a cathode 5 are installed in each, and each pole is connected to a DC power supply 6. A liquid junction 16 is provided below each electrode, and connects the anode chamber and the cathode chamber. The liquid junction has a liquid supply unit 9 so that the electrolytic stock solution can be supplied. Further, drain ports 7 and 8 are provided at the upper part of each electrode chamber so that the acidic electrolyzed water and the alkaline electrolyzed water are separately discharged. The operation of this electrolytic cell is as follows. The electrolytic undiluted solution continuously supplied from the liquid supply unit is divided into equal amounts on both sides at the liquid junction, and respectively flows into the anode chamber and the cathode chamber. The acidic electrolyte and the alkaline electrolytic chamber, which are generated by electrolysis in the bipolar chambers, are continuously discharged from the discharge ports 7 and 8, respectively.

[0006]

The effect of the present invention is to separate the anode chamber and the cathode chamber in an electrolysis device for electrolyzing a salt solution or the like to obtain acidic electrolyzed water having a strong sterilizing effect and alkaline electrolyzed water having a cleaning effect. The diaphragm is unnecessary. Conventionally used diaphragms are the main cause of increasing the running cost by increasing the electric resistance of the electrolytic cell or requiring replacement due to wear, so if you do not use it, the running cost will be low and maintenance will be reduced. The labor of is also reduced. Furthermore, a maintenance-free electrolytic cell is also possible, and there are less restrictions on the purpose of use.

[Brief description of drawings]

[Figure 1] Cross-section of batch-type non-diaphragm anion / water separation type electrolytic cell and connection of power source

[Fig. 2] Continuous non-diaphragm anion / water separation type electrolyzer and stock solution supply system, acidic electrolyzed water and alkaline electrolyzed water sampling system

[Sign name]

1. Batch-type non-diaphragm anion / water separation type electrolytic cell 2. Anode chamber (50 ml) 3. Cathode chamber (50m / l) 4. anode 5. cathode 6. DC power supply (24V) 7. Drainage port (anode chamber) 8. Drainage port (cathode chamber) 9. Liquid supply section 10. Metering pump 11. Saturated saline solution tank 12. Acid electrolyzed water collection container Sanhou valve 13. Alkaline electrolyzed water collection container 14. Three-way valve 15. Vent 16. Liquid junction 17. Continuous non-diaphragm anion / water separation type electrolytic cell

Claims (4)

[Claims] 1. Two container parts, each containing an electrode, are joined together by a liquid junction installed at a position lower than the lower end of the electrode, and the liquids contained in the respective container parts are associated with each other. A non-diaphragm anion / anode water separation type electrolytic cell characterized in that an electrolyte solution of a cathode and an anode is produced separately by having a structure in which an electric conduction is ensured by passing a liquid from one accommodation section to another accommodation section. 2. The non-diaphragm negative / anode water separation type electrolysis according to claim 1, wherein a valve capable of opening / closing liquid conduction is attached to a liquid junction. Tank 3. The valve according to claim 2, wherein the valve attached to the liquid junction is a three-way valve, and the liquid contained in the two accommodating portions can be separately taken out. The membrane-less anion / anod water separation type electrolytic cell according to claim 1. 4. The non-diaphragm anion / anod water separation type electrolytic cell according to claim 1, wherein a water supply part capable of supplying a new liquid to the liquid junction is provided, and each accommodating part is provided above the installation position of the liquid junction. The discharge part is attached to the liquid supply device, and the liquid continuously supplied from the water supply part is divided into each of the storage parts and electrolyzed, and then the storage part is separately discharged with the electrolytic solution from the discharge part.
The non-diaphragm anion / water separation type electrolytic cell according to claim 1, which has a structure in which cathodic electrolyzed water and anodic electrolyzed water are separated and continuously obtained.