JPH08168762A - Electrolytic ionized water producing device and method therefor - Google Patents

Abstract

PURPOSE: To provide an electrolytic ionized water producing device and method capable of continuously and efficiently producing only an acidic ionized water of an anode side in the acidic ionized water and an alkaline ionized water produced by electrode reaction. CONSTITUTION: This electrolytic ionized water producing device is constituted of a tightly closed electrolytic cell 5 having an electrolyte supply opening 1 provided in a cathode chamber 3 and an electrolytic ionized water collecting opening 6 provided in an anode chamber 4, two kinds of electrodes of cathode 10 and anode 11 arranged inside of the electrolytic cell 5, a water permeable diaphragm 2, which is intermediate between electrodes and for separating the electrolytic cell 5 into the cathode chamber 3 and the anode chamber 4, and a DC electric source 7 for impressing voltage to the electrodes. Only the acidic ionized water is formed from the electrolytic ionized water collecting opening 6 by supplying an acidic electrolytic solution from the electrolyte supply opening 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing electrolytic ionic water and a method for producing electrolytic ionic water, and more particularly to an apparatus for producing electrolytic ionic water and a method for producing electrolytic ionic water.

[0002]

2. Description of the Related Art As this type of electrolytic ionized water generator conventionally used, the structure shown in FIG. 3 is generally employed.

FIG. 3 is a sectional view showing the configuration of a conventional example of an electrolytic ionized water generator. The electrolytic ionic water generator includes a sealed electrolytic cell 25 having an electrolyte supply port 16, a cathodic ionic water port 14, and an anodic ionic water port 15, and a chemical tank disposed opposite to the inside of the electrolytic cell 25. A pair of electrodes, a cathode 22 and an anode 23, which are inactive, an ion-permeable diaphragm 24 intermediate the electrodes and separating the electrolytic cell 25 into a cathode chamber 17 and an anode chamber 18, and applying a voltage to the electrodes. It comprises a DC power supply 19 for applying.

As a method for producing electrolytic ionic water, a diaphragm 24 is used.
The raw material water is supplied to the cathode chamber 17 and the anode chamber 18 which are separated into a pair by the above, and the cathode 22 and the anode 2 immersed in the raw water are supplied.
3, a DC voltage is applied from an external DC power supply 19,
Electrolytic ionized water is obtained by electrolyzing the raw material water.

In this case, since the electric resistance is high and the electrolysis efficiency is low only by applying a voltage to pure water, an electrolytic solution to which Na salt or Ca salt is added as an electrolyte is usually used as raw material water. The electrolytic solution containing the electrolyte is supplied at a constant flow rate by the pump 21 through the electrolytic solution water supply port 16 to the cathode chamber 1.
7 and the anode chamber 18, and electrolysis is continuously performed.

[0006] Ion water generated on the cathode side by electrolysis is taken out from a cathode ion water inlet 14, and ion water generated on the anode side is taken out from an anode ion water inlet 15. As for the use of the above-mentioned electrolytic ionic water, alkaline ionic water on the cathode side is widely used for beverages. On the other hand, acidic ionic water on the anode side has a high oxidizing power, and is reported to be effective as oxidizing electrolytic ionic water for sterilization and disinfection in medical treatment, food industry, agriculture, and the like.

Hereinafter, a reaction when a solution using NaCl as an electrolyte is electrolyzed will be described. By electrolyzing a solution using NaCl as an electrolyte, Na ⁺ moves to the cathode side, and Cl ⁻ moves to the anode side, and the Na ⁺
It shows properties as a 0H solution and an HCl solution. The pH of alkaline ionic water or acidic ionic water is contributed by the movement of ionic species present in these electrolytic cells. Further, chlorine and chlorine oxides to produce Cl ^over is oxidized on the anode side. Chlorine oxide has a strong oxidizing power, and for example, a sterilization method using sodium hypochlorite is well known.

[0008] It has been reported that ion water containing chlorine oxide generated on the anode side can also be used in the same manner as sodium hypochlorite. In addition, electrolyzed ionic water needs to be given special consideration to storage problems such as chemical stability and safety, unlike when chemicals are used, because electrolyzed ionic water is generated by electrolysis just before use. Absent. As described above, the electrolytic ionized water has an advantage that the electrolytic ionized water having desired characteristics can be easily generated in a required amount in a required amount according to the electrolysis conditions by a generator having a basically simple structure.

[0009]

As described above, according to the prior art, acidic ionized water on the anode side and alkaline ionized water on the cathode side are simultaneously produced. However, it is rare to use both ionized waters at the same time. In the conventional production method, the alkaline ionized water produced at the same time when only the acidic ionized water is required is wasted.

The object of the present invention is to overcome the above-mentioned drawbacks and to make it possible to continuously and efficiently generate only acidic ionic water on the anode side among acidic ionic water and alkaline ionic water produced by an electrode reaction. Another object of the present invention is to provide an electrolytic ion water producing apparatus and an electrolytic ion water producing method.

[0011]

In the electrolytic ionized water generator of the present invention, the electrolytic solution supply port is attached only to the cathode chamber,
The electrolytic water sampling port is attached only to the anode chamber, and the diaphragm separating the cathode chamber and the anode chamber has water permeability.

Preferably, the diaphragm has a function of preventing convection of the electrolyte solution between the cathode chamber and the anode chamber. A bypass communicating the cathode chamber and the anode chamber, and a water pressure in the cathode chamber are controlled to a predetermined value. And a pressure regulating valve that opens the flow path when the pressure exceeds the pressure.

In the method for producing electrolytic ionic water of the present invention,
An electrolyte solution of an acidic solution is supplied from an electrolyte supply port.

[0014]

In the electrolytic ionized water producing apparatus and the electrolytic ionized water producing method of the present invention, since the acidic electrolytic solution is supplied from the cathode chamber side and the water is sampled only from the anode chamber side through the water permeable membrane, only the acidic ionized water is used. Can collect water.

Further, by feeding the liquid from the cathode chamber to the anode chamber through the water permeable diaphragm and the bypass and collecting the ion water generated at the anode, it is possible to efficiently generate acidic ion water.

This acidic ionized water has the same characteristics as those of conventional acidic ionized water in comparison with the pH and ORP (redox potential) characteristics.

[0017]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the configuration of the electrolytic ionic water generator according to the first embodiment of the present invention.

The electrolytic ionic water generating apparatus according to the present invention comprises a sealed electrolytic cell 5 having an electrolyte supply port 1 provided in the cathode chamber 3 and an electrolytic ionic water supply port 6 provided in the anode chamber 4; Chemically inactive cathode 1 disposed opposite to inside
And a pair of electrodes, i.e., an anode 0 and an anode 11, and a water-permeable diaphragm 2 intermediate the electrodes and separating the electrolytic cell 5 into a cathode chamber 3 and an anode chamber 4.
And a DC power supply 7 for applying a voltage to the electrodes. In order to prevent diffusion from the anode chamber 4 to the cathode chamber 3, the water-permeable diaphragm 2 preferably has a structure that prevents convection between the two electrode chambers. An acidic electrolyte is supplied to the partitioned cathode chamber 3 and anode chamber 4 from an electrolyte water supply port 1 provided in the cathode chamber 3, and an external direct current is applied to the cathode 10 and the anode 11 immersed in the acidic electrolyte. A DC voltage is applied from a power source 7 and electrolytic solution is electrolyzed to obtain electrolytic ionic water, and acidic ionic water is collected from an electrolytic ionic water sampling port 6 provided in the anode chamber 4.

In the experimental apparatus of the present embodiment, the amount of anode ionized water, which is the target product of the electrolytic ionized water generator, is
It was designed to be adjustable from 100 ml / min to 30 l / min. Adjustment of the flow rate was controlled by a pump 9 connecting the electrolyte supply port 1 and the electrolyte solution tank 8. The volume of both electrode chambers was 200 ml for both the cathode chamber 3 and the anode chamber 4, and the distance between the electrodes was about 1 for both electrodes.
A 200 mm × 200 mm Pt plate was set so as to be 0 mm.

The water permeable diaphragm 2 separating the cathode chamber 3 and the anode chamber 4 has a membrane area of 200 mm × 200 mm and 2 kg /
water permeability for water pressure of cm ² is 0.8ml / cm ² · sec
Is. The electrolyte moves from the cathode chamber 3 side to the anode chamber 4 through the water permeable diaphragm 2 by the water pressure of the pump. At that time, since the water pressure in the cathode chamber 3 is higher than that in the anode chamber 4, the generated electrolyzed water on the anode side does not flow back to the cathode.

The diaphragm used in this experimental apparatus had a maximum flow rate of 19
The solution can be permeated up to 1 / min.
The hydrogen gas generated in the cathode chamber 3 by the electrolysis moves to the anode chamber 4 through the water-permeable diaphragm 2 and is sampled to be discharged to the atmosphere.

In this electrolytic cell, 0.01 mol / l HCl was added.
The solution (pH 1.8, ORP 650 mV) was supplied from the electrolyte solution tank 8 at a water supply rate of 100 ml / min, and the cathode 1
By applying a direct current voltage of about 8 V between 0 and the anode 11, a current of about 0.25 A flows between both electrodes. A constant current and constant voltage DC power supply was used as a power supply.

As a result of performing electrolysis with the above-described experimental apparatus under the above-described electrolysis conditions, the characteristics of the obtained ionic water were adjusted to pH 2.0.
0 and ORP was about 1200 mV.

Generally, as a characteristic of acidic ionized water, pH is
2. A sufficient effect has been recognized at an ORP of about 1100 mV. When NaCl is used as the electrolyte, acidic electrolyzed water is obtained on the anode side and alkaline electrolyzed water is obtained on the cathode side. However, when the acidic solution is used as the electrolyte solution as in the present invention, the pH hardly changes on both the anode side and the cathode side. By utilizing this characteristic, in the apparatus of the present invention, by using an acidic aqueous solution such as an HCl solution as the electrolyte solution, electrolytic ionic water having the above-mentioned characteristics could be efficiently generated.

Using the conventional electrolytic ionic water generating apparatus shown in FIG. 3, acidic ionic water and alkaline ionic water are separately produced using the same 0.01 mol / l HCl solution as an electrolyte. When mixed, the ORP of the acidic ionized water dropped from about 1170 mV alone to about 650 mV after mixing, so the experimental example of the present invention is essentially the same as the state of simply mixing the acidic ionized water and the alkaline ionized water. It turns out that it is different.

Next, with reference to FIG. 2, a second embodiment of the electrolytic ion water producing apparatus and electrolytic ion water producing method according to the present invention will be described. FIG. 2 is a cross-sectional view showing the configuration of the electrolytic ionized water generator of the second embodiment of the present invention. The electrolytic ionized water generator of the present embodiment is configured by adding a bypass 12 and a pressure regulating valve 13 to the configuration described in the first embodiment.

The bypass 12 is provided so as to communicate the cathode chamber 3 and the anode chamber 4, and when the water pressure in the cathode chamber 3 exceeds a predetermined pressure, the pressure regulating valve 13 opens to open the flow path.

In the experimental apparatus of the first embodiment, the water supply amount of the electrolytic solution was 19 l / mi based on the water permeability of the water permeable diaphragm 2.
It is possible to transmit up to n, but it is impossible to cope with a higher flow rate. Therefore, in order to cope with a water supply amount exceeding a specified value, a bypass 12 for communicating the cathode chamber 3 and the anode chamber 4 is provided, and a pressure regulating valve 13 is provided in the middle of the bypass.

By operating the bypass 12 and the pressure regulating valve 13, the electrolyte in the cathode chamber 3 can be automatically sent to the anode chamber 4. Diameter 2 for bypass
When a 0 mm pipe was used, it was possible to generate acidic ionized water having desired characteristics up to a maximum flow rate of 30 l / min. According to the method of this embodiment, more acidic ionized water can be generated without increasing the size of the electrolytic device.

[0030]

As described above, in the electrolytic ionic water generating apparatus and the electrolytic ionic water generating method of the present invention, all of the supplied electrolyte can be generated as anodic ionic water. Therefore, when only the acidic ionized water is required, there is no generation of the alkaline ionized water by-produced by the conventional electrolytic ionized water generator, and there is an effect that all of the alkaline ionized water can be generated without waste as the acidic ionized water.

Further, by providing the water permeable membrane with a function of preventing convection of the electrolyte solution between the cathode chamber and the anode chamber, diffusion of the electrolyte solution can be prevented and the efficiency of electrolysis can be increased.

Further, by providing a bypass and a pressure regulating valve for communicating the cathode chamber and the anode chamber, the ability of the apparatus to generate acidic ionized water can be significantly increased economically.

Since a large amount of oxidizing electrolytically ionized water can be produced economically, it can be applied to all industrial fields that require acidic ionized water.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of an electrolytic ionized water generator according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of an electrolytic ionized water generator according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a configuration of a conventional example of an electrolytic ionized water generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolyte water supply port 2 Permeable diaphragm 3 Cathode chamber 4 Anode chamber 5 Electrolysis tank 6 Electrolytic ion water sampling port 7 DC power supply 8 Electrolyte solution tank 9 Pump 10 Cathode 11 Anode 12 Bypass 13 Pressure control valve 14 Cathode ion water sampling port 15 Anode ion water sampling port 16 Electrolyte water supply port 17 Cathode chamber 18 Anode chamber 19 DC power supply 20 Electrolysis chamber solution tank 21 Pump 22 Cathode 23 Anode 24 Diaphragm 25 Electrolyte tank

Claims (4)

[Claims] 1. A closed electrolytic cell having an electrolytic solution water inlet and an electrolytic ion water sampling port, two kinds of electrodes, a cathode and an anode, which are arranged inside the electrolytic cell, and the inside of the electrode. In an electrolytic ionic water generator having an ion-permeable diaphragm that separates the electrolytic cell into a cathode chamber and an anode chamber in between, and a DC power source for applying a voltage to the electrode, the electrolytic solution water supply port is An electrolyzed ionized water production apparatus, which is attached only to the cathode chamber, the electrolyzed water sampling port is attached only to the anode chamber, and the diaphragm has water permeability. 2. The electrolytic ionized water generator according to claim 1, wherein the diaphragm has a function of preventing convection of the electrolyte solution between the cathode chamber and the anode chamber. Generator. 3. The electrolytic ionic water generator according to claim 1, wherein the bypass communicates with the cathode chamber and the anode chamber, and the bypass flows when a water pressure in the cathode chamber exceeds a predetermined pressure. And a pressure regulating valve for opening the passage. 4. An electrolytic solution is supplied from an electrolytic solution water supply port provided in the cathode chamber between the cathode chamber and the anode chamber of the electrolytic cell separated by a water permeable diaphragm, and the electrolytic water is provided in the anode chamber. In the process until water is collected from the water outlet, the electrolytic solution is electrolyzed by a cathode and an anode respectively provided in the bipolar chamber and applied with a voltage from a DC power supply, thereby producing electrolytic ionic water. In the production method, the electrolytic solution supplied from the electrolytic solution supply port is an acidic solution, and the electrolytic ionic water producing method is characterized in that: