WO2009155749A1

WO2009155749A1 - Method and device for producing electrolytic ions or radicals from a solution in an electrolytic cell

Info

Publication number: WO2009155749A1
Application number: PCT/CN2008/071459
Authority: WO
Inventors: 周辉煌
Original assignee: 马士科技有限公司
Priority date: 2008-06-27
Filing date: 2008-06-27
Publication date: 2009-12-30

Abstract

A method for producing electrolytic ions or radicals from a solution in an electrolytic cell which comprises the following steps: providing an electrolytic cell which comprises at least a cathode chamber with a cathode, at least an anode chamber with an anode, and an ions- or radicals-injecting medium which fully or partly fills the electrolytic cell; adding the liquid to be treated into the electrolytic cell; and applying direct current or pulse current between the anode and cathode. Thus the electrolysis can be carried out and the electrolytic ions or radicals can be produced by it. The electrolytic cell may include a diaphragm for separating the anode chamber and the cathode chamber. An apparatus in relation to the above-said method is also provided in the present invention. The present method can improve the effect of producing electrolytic ions or radicals of the electrolyte in the cell, while the acidic solution and alkaline solution obtained by electrolysis have stable pH value and oxidation-reduction potential.

Description

Method and apparatus for producing electrolytic ions or electrolytic groups in a liquid in an electrolytic cell

The present invention relates to an electrolytic method and apparatus for producing electrolytic ions or electrolytic groups, and more particularly to an electrolysis which utilizes an appropriate current density and which is combined with an ion or a group injecting medium such as activated carbon to enhance the generation of electrolytic ions or electrolytic groups. Method and device. Background of the invention

It is well known that water is electrolyzed in a diaphragm electrolyzer, and hydrogen and oxygen are generated on both sides of the anode and cathode electrodes, respectively. As a result of the electrical attraction, the solution undergoes ion electrophoresis. As a result, an acidic substance is formed on the anode side, the solution becomes an acidic solution, and the solution on the cathode side becomes an alkaline solution.

The alkaline electrolyzed water produced when the aqueous solution is electrolyzed can suppress abnormal intestinal fermentation and is also available for drinking. On the other hand, acidic electrolyzed water is considered to have bactericidal action and astringent action, etc., and can be used in the fields of cleaning and medical treatment. Therefore, both acidic and alkaline electrolyzed waters are suitable for health care and are widely used in the medical, electronics, and food industries.

The parameters of the electrolyzed water are usually pH values and redox potentials representing the concentration of hydrogen ions.

For alkaline electrolyzed water, when the oxidation-reduction potential is relatively low, it is good for health in most cases. When the redox potential is relatively high, in most cases, it has little effect on health. In general, when the oxidation-reduction potential is in the range of -50 to -250 mV, the alkaline electrolyzed water is more effective for health care. When the oxidation-reduction potential is in the range of +100 to +250 mV, the alkaline electrolyzed water has a poor health effect.

For acidic electrolyzed water, when the oxidation-reduction potential is relatively high, it has a good convergence and bactericidal action in most cases. When the redox potential and the dissolved oxygen concentration are relatively low, the convergence and bactericidal action are poor in most cases. In general, when the pH is less than 4 and the redox potential is greater than +800 mV, the acidic electrolyzed water has a significant astringent effect on the skin, and even after the water evaporates, the skin remains smooth and the converging action lasts for a long time. When the pH value is less than 3.5 and the redox potential is greater than +900mV, the acidic electrolyzed water has strong bactericidal activity and can kill most bacteria in a short time without damaging the skin or mucous membrane, so it is useful and effective antibacterial. Agent.

The quality of raw water such as tap water varies with season, water temperature, area, and the like. The water quality significantly affects the redox potential of the electrolyzed water produced by the electrolyzer. Therefore, the pH and the redox potential of the thus-produced alkaline electrolyzed water and acidic electrolyzed water are also changed, so that the desired effect cannot be ensured. In addition, the related electrolysis methods and devices still produce various dilute aqueous solutions containing trace amounts of additives, which greatly limits the Its application range of electrolytic aqueous solution.

In view of the foregoing, it is desirable to provide a method and apparatus for efficiently producing electrolytic ions or electrolytic groups in an electrolytic solution to obtain an acidic and alkaline electrolytic solution which is stable and has a desired degree of electrolysis. Summary of the invention

In order to achieve the above object, an aspect of the present invention provides a method of producing an electrolytic ion or an electrolytic group in a liquid in an electrolytic cell, the method comprising the steps of:

Providing an electrolytic cell comprising at least one cathode chamber provided with a cathode electrode and at least one anode chamber provided with an anode electrode, and an ion or group injection medium filled or partially filled in the electrolytic cell (ions or radicals injecting medium);

Adding a liquid to be electrolyzed into the electrolytic cell;

A direct current or a pulse current is applied between the cathode electrode and the anode electrode to electrolyze the liquid in the electrolytic cell to generate electrolytic ions or groups.

Preferably, the electrolytic cell further includes a separator for separating the cathode chamber and the anode chamber. The preferred ionic or group injecting medium of the present invention is activated carbon, wherein the activated carbon is a specially processed carbon particle, which may also be in the form of powder, depending on the electrolyte body or the actual needs. Granularity.

The method of the present invention is suitable for electrolyzing a liquid: an acidic aqueous solution, an alkaline aqueous solution or an oil, wherein the aqueous solution includes tap water, sea water, well water, industrial wastewater, etc., and the oil includes heavy oil and light oil. According to the method of the present invention, after the aqueous solution is subjected to the electrolysis step, the pH of the aqueous electrolytic solution flowing out of the anode chamber is between 1.4 and 7.0, and the pH of the aqueous electrolytic solution flowing out of the cathode chamber is between 7.0 and 12.5.

According to need, the present invention is applied in the range of 50A / m ² to 800A / m ^2, preferably between the density of a current between the cathode electrode and the anode electrode in the range of 200 A / m ² to 800 A / m ^2. The electrolyzed liquid has an oxidation-reduction potential of +500 mV or more and -400 mV or less.

In accordance with the method of the present invention, the electrolysis step can be operated continuously or intermittently, using a continuous, pulsed or circular waveform.

The liquid after electrolysis by the method of the invention can be used for at least one of the following applications: petrochemical industry, sterilization, health drinks, food washing, medical treatment, cosmetics, spray, deodorization, rust prevention, plant growth, disinfection, pet/animal care , pool water spray, water storage, aquarium water, and purification.

Another aspect of the invention relates to a device for producing an electrolytic ion or electrolytic group in a liquid, the device comprising: An electrolytic cell for storing a liquid to be electrolyzed, the electrolytic cell comprising at least one cathode chamber, at least one anode chamber, and an ion or group injection medium filled or partially filled in the electrolytic cell;

One or more pairs of cathode electrodes and anode electrodes, which are disposed adjacent to each other in the cathode chamber and the anode chamber;

a power source that applies a direct current or a pulse current between the cathode electrode and the anode electrode for electrolysis. The electrolytic cell further includes a separator for separating the cathode chamber and the anode chamber, the separator being made of a conductive material that allows ions or groups to pass through, such as a cation exchange membrane, an anion exchange membrane. , or other membrane that allows ions to pass selectively.

In the electrolysis apparatus of the present invention, the electrolytic cell may be formed into a cylinder or a square body, and the cathode electrode and the anode electrode may be circular or flat mesh electrodes or plate electrodes.

The present invention provides an ion or group injecting medium such as activated carbon in the electrolytic cell, and when a direct current or a pulse current having a current density of between 50 A/m ² and 800 A/m ² is applied between the cathode electrode and the anode electrode, The ion or group injecting medium as a catalyst can catalyze the electrochemical reaction of liquid molecules in the electrolysis process, thereby enhancing the effect of ions or groups generated by the electrolyte in the electrolysis cell, and the acidic electrolytic solution and the alkaline electrolytic solution after electrolysis. Has a stable pH and redox potential. In addition, the activated carbon can also absorb other impurities in the electrolyte, thereby eliminating trace substances in the electrolyte.

The concept, the specific structure and the technical effects of the present invention will be further described in conjunction with the accompanying drawings in order to fully understand the objects, features and effects of the invention. However, the drawings are for illustrative purposes only and are not to be construed as limiting the invention. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view showing an apparatus for generating electrolytic ions or electrolytic groups in a liquid according to an embodiment of the present invention. detailed description

Referring to Figure 1, a device 10 for producing electrolytic ions or electrolytic groups in a liquid of the present invention comprises an electrolytic cell 100 for storing a liquid 400 to be electrolyzed, such as various types of water and oil. The electrolytic cell 100 includes a cathode chamber 200 and an anode chamber 300. The cathode chamber 200 and the anode chamber 300 are separated by a diaphragm 600. Most of the space in the electrolytic cell 100 is filled with ions or radical injection medium 500, which acts to inject ions or groups.

The electrolytic cell 100 can be made into various shapes according to different requirements, such as a cylinder, a cuboid or a stand. Cubes, etc. The material of the electrolytic cell 100 may be steel, cement or ceramics. When used for a highly corrosive electrolyte, a corrosion-resistant resin or rubber lining may be added to the electrolytic cell.

The liquid 400 in the electrolytic cell 100 may be various types of aqueous solutions or oils, including but not limited to: tap water, sea water, well water, industrial wastewater, etc., including but not limited to: fuel oil, heavy oil, light oil, and the like.

A cathode electrode 210 is disposed in the cathode chamber 200, and an anode electrode is disposed in the anode chamber

310. They are mounted vertically in the respective electrolysis chambers as close as possible to each other to reduce the distance between the electrodes, thereby reducing the bottom voltage loss, which is well known to those skilled in the art. The cathode electrode 210 and the anode electrode 310 are made of a material having good conductivity. The cathode electrode and the anode electrode may be selected from a metal or a combination thereof of titanium, platinum, palladium, iron, cobalt, nickel, copper, zinc, and alloys thereof, preferably made of titanium or a titanium alloy. The anode electrode and the cathode electrode may also be made of a conductive non-metal such as graphite. Of course, the materials used for the male and female electrodes are not limited to the above materials. The cathode electrode 210 and the anode electrode 310 may be formed into a circular or flat mesh electrode or a plate electrode. In order to reduce the self-corrosion speed of the anode and cathode electrodes and to improve the utilization thereof, the electrodes may be coated with a protective layer. The protective layer is mainly composed of a metal oxide, for example, the case body is a seawater electrolyte, the choice of metal oxide RuO _{_{_₂}} -TiO ₂ -IrO ₂ -SnO ₂ or IrO ₂ -TaO _5.

The separator 600 is made of a well-conductive material that allows passage of ions or groups, such as a cation exchange membrane, an anion exchange membrane, or other membrane that allows ions to selectively pass, such as a polymer film such as polypropylene or polyethylene. .

A direct current or a pulse current is applied between the cathode electrode 210 and the anode electrode 310 for electrolysis, and a continuous, pulsed or circular waveform can be used for power supply. The current density between the anode and the anode electrode is between 50 A/m ² and 800 A/m ² , preferably 200 A/ depending on the type of the different electrolyte, the desired pH of the electrolytic solution, and the like. m ² to 800 A/m ² .

In this embodiment, the ion or group medium 500 is activated carbon. The activated carbon may be activated carbon powder or activated carbon particles, depending on actual needs. The electrolytic cell 100 may be completely filled or partially filled with activated carbon as long as the electrolytic solution 400 can sufficiently flow freely in the electrolytic cell 100. Activated carbon is used as a catalytic medium in the present invention to catalyze the electrochemical reaction of liquid molecules in the electrolysis process, so that the electrolyte can be increased to generate ions or groups during the electrolysis process. Specifically, when a direct current or a pulse current is applied between the cathode electrode 210 and the anode electrode 310, the electrolytic ions or groups are transferred onto the surface of the activated carbon and in the cathode chamber 200 and the anode chamber 300 or on the separator 600. The ions or molecules undergo a reaction, for example, H ⁺ can efficiently react with the electrolyte molecules, thereby catalyzing the electrolysis reaction during the electrolysis, thereby enhancing the generation of electrolytic ions or groups. As is known to those skilled in the art, the finer the particle size of the activated carbon, the larger the surface area, the more favorable it is for the electrolysis reaction. The catalysis, the better the results obtained.

According to the method of the present invention, the anode chamber 300 undergoes an anodic reaction, and the cathode chamber 200 undergoes a cathodic reaction. For example, if the electrolyte is water, the anode reacts to obtain oxygen and hydrogen ions, and the pH of the acidic aqueous electrolytic solution that flows out is between 1.4 and 7.0; the cathode reacts to obtain hydrogen and hydroxide ions, and the pH of the aqueous alkaline electrolytic solution that flows out The value is between 7.0 and 12.5. The obtained acidic and alkaline electrolytic aqueous solution does not contain any other compound ions having opposite charges, and thus has a health care function and does not damage the environment.

The liquid electrolyzed by the method of the present invention has a redox potential of +500 mV or more and -400 mV or less.

The electrolytic solution after electrolysis by the method of the present invention has the above-mentioned pH value and redox potential, and thus can be used for the following applications: petrochemical industry, sterilization, health drink, food washing, medical treatment, cosmetics, spray, deodorization, prevention Rust, vegetative, disinfection, pet/animal care, pool sprinkler, water storage, aquarium water, and purification. Example

Using the electrolysis device 10 shown in Fig. 1, the electrolytic cell contains activated carbon in an amount of about 3/4 of its volume, and the electrolyte is tap water. The conditions for electrolysis are as follows:

DC current: 1.38A, 25v;

Temperature: room temperature

Electrolysis time: 10 minutes

Cathode material: stainless steel mesh electrode

Anode material: Titanium alloy

Diaphragm: polymer ion exchange membrane

The results showed that after 10 minutes of electrolysis, the pH of the aqueous solution on the anode side decreased from 7.2 to 2.7, the oxidation-reduction potential was +230 mV, and the pH of the electrolytic side of the cathode side increased from 7.2 to 10.9, and the oxidation-reduction potential was -223 mV. In contrast, electrolysis was carried out by a conventional electrolysis method, and the pH of the aqueous solution in the electrolysis cell did not change significantly even after 1 hour of electrolysis. Thus, the electrolysis method of the present invention not only greatly shortens the electrolysis time, but also significantly enhances the ability of the electrolyte to generate electrolytic ions or groups.

While the invention has been described in detail, the preferred embodiments of the present invention may be variously modified or modified without departing from the spirit and scope of the invention. It should be noted that such variations or modifications are within the scope of the invention.

Claims

Rights request

A method of producing an electrolytic ion or an electrolytic group in a liquid in an electrolytic cell, the method comprising the steps of:

Providing an electrolytic cell comprising at least one cathode chamber provided with a cathode electrode and at least one anode chamber provided with an anode electrode, and an ion or group injection medium filled or partially filled in the electrolytic cell ;

Adding a liquid to be electrolyzed into the electrolytic cell;

2. The method of claim 1 wherein said electrolysis cell further comprises a membrane for separating said cathode chamber and said anode chamber.

3. The method of claim 1 wherein said ion or group injection medium is activated carbon.

The method according to any one of claims 1 to 3, characterized in that the liquid to be electrolyzed is an aqueous solution or an oil.

The method according to claim 4, wherein the aqueous solution comprises tap water, sea water, well water, industrial wastewater.

The method according to claim 5, wherein after the electrolysis step, the pH of the aqueous electrolytic solution flowing out of the anode chamber is between 1.4 and 7.0.

The method according to any one of claims 5 to 5, wherein, after the electrolysis step, the pH of the aqueous electrolytic solution flowing out of the cathode chamber is between 7.0 and 12.5.

8. The method of claim 4 wherein said oil comprises heavy oil and light oil.

The method according to any one of claims 1 to 3, characterized in that the current density of the current is in the range of 50 A/m ² to 800 A/m ² .

10. The method according to claim 9, wherein the current density of the current at 200 A / m ² to 800A / range between m ^2.

The method according to any one of claims 1 to 3, wherein the electrolyzed liquid has an oxidation-reduction potential of +500 mV or more to 400 mV or less.

The method according to any one of claims 1 to 3, characterized in that the electrolysis step can be operated continuously or intermittently.

The method according to any one of claims 1 to 3, characterized in that the electrolytic solution after the electrolysis step can be used for at least one of the following uses: petrochemical industry, sterilization, health drink, food washing, medical treatment , cosmetics, spray, deodorant, rust, plant growth, disinfection, pet/animal care, pool water spray, water storage, aquarium water, and purification.

14. A device for producing an electrolytic ion or electrolytic group in a liquid, the device comprising: an electrolytic cell for storing a liquid to be electrolyzed, the electrolytic cell comprising at least one cathode chamber, at least one anode chamber, and Full or partially filled with ions or groups of injection medium in the electrolytic cell;

A power source applies a direct current or a pulse current between the cathode electrode and the anode electrode for electrolysis.

15. Apparatus according to claim 14 wherein said electrolysis cell further comprises a membrane for separating said cathode chamber and said anode chamber.

16. Apparatus according to claim 15 wherein said membrane is made of a highly conductive material that allows ions or groups to pass through.

The apparatus according to any one of claims 14 to 16, wherein the electrolytic cell is formed into a cylinder, a rectangular parallelepiped or a square.

The device according to any one of claims 14 to 16, wherein the cathode electrode and the anode electrode are circular or flat mesh electrodes or plate electrodes.

The apparatus according to any one of claims 14 to 16, wherein the ion or group injection medium is activated carbon.

The device according to any one of claims 14 to 16, wherein the liquid to be electrolyzed is an aqueous solution or an oil.

21. Apparatus according to claim 20 wherein said aqueous solution comprises tap water, sea water, well water, industrial wastewater.

22. Apparatus according to claim 20 wherein said oil comprises heavy oil and light oil.

23. Apparatus according to any one of claims 14 to 16, wherein the current has a current density in the range of 50 A/m ² to 800 A/m ² .

24. The apparatus of one of claims 14 to 16 claims, characterized in that the current density of the current is in the range 200 A / m ² to 800A / m ^2.