Electrolysis device, electrode preparation method, and cleaning apparatus

Abstract

The application relates to an electrolysis device, an electrode preparation method and a cleaning device, and relates to the technical field of household appliances. The electrolysis device comprises a container, a high-voltage discharge assembly, an electrode assembly and a power supply assembly, raw water is contained in the container; the high-voltage discharge assembly is partially arranged in the raw water, the high-voltage discharge assembly generates reaction products, and the reaction products flow into the raw water; the electrode assembly comprises a cathode electrode and an anode electrode; the power supply assembly is electrically connected with the high-voltage discharge assembly and the electrode assembly; wherein the reaction products react with the products of the electrode assembly to generate cleaning water with oxidizing active substances to clean the to-be-cleaned objects. The technical scheme disclosed by the application has good cleaning effect and can completely remove pesticide residues on the surfaces of fruits and vegetables.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to an electrolysis device, an electrode preparation method and a cleaning equipment. BACKGROUND

[0002] Household appliances mainly refer to various electrical appliances and electronic appliances used in households and similar places, also known as civilian appliances and daily-use appliances.

[0003] With people's attention to food safety issues, more and more attention is paid to fruit and vegetable cleaning, pesticide residues and food safety in daily life, and fruit and vegetable cleaning machines are used more and more commonly as household appliances.

[0004] The existing fruit and vegetable cleaning machine generally cleans fruits and vegetables by ultrasonic, ozone and other methods, but the existing fruit and vegetable cleaning machine cannot efficiently and completely remove pesticides, and it is difficult to completely remove pesticide residues on the surface of fruits and vegetables, so that the cleaning effect is not good, and there is a safety hazard in eating fruits and vegetables. SUMMARY

[0005] The present application provides an electrolysis device, an electrode preparation method and a cleaning equipment, which can completely remove pesticide residues on the surface of fruits and vegetables.

[0006] In a first aspect, the present application provides an electrolysis device, comprising:

[0007] a container, which contains raw water;

[0008] a high-voltage discharge assembly, part of which is arranged in the raw water, the high-voltage discharge assembly generates reaction products, and the reaction products flow into the raw water;

[0009] an electrode assembly, which includes a cathode electrode and an anode electrode; and

[0010] a power supply assembly, which is electrically connected to the high-voltage discharge assembly and the electrode assembly respectively;

[0011] wherein the reaction products and the products of the electrode assembly react to generate cleaning water with oxidizing active substances to clean the objects to be cleaned.

[0012] In one embodiment, the reaction products include nitrogen oxides, which are dissolved in the raw water to form nitrite ions;

[0013] the products include hydrogen peroxide, which is generated by a reduction reaction on the cathode electrode;

[0014] wherein the hydrogen peroxide reacts with the nitrite ions to generate cleaning water with peroxynitrite ions.

[0015] In one embodiment, the high-voltage discharge assembly comprises:

[0016] an outer tube having a fluid outlet, and the fluid outlet is arranged in the raw water;

[0017] an inner electrode arranged in the outer tube, and a preset gap is formed between the inner electrode and the inner wall of the outer tube to form a discharge channel; and

[0018] a filling body arranged between the outer tube and the inner electrode;

[0019] wherein the filling body blocks part of the discharge channel, so that the reaction product flows from the fluid outlet to the raw water.

[0020] In one embodiment, the outer tube comprises:

[0021] a main tube arranged coaxially with the inner electrode, and the fluid outlet is located at one end of the main tube;

[0022] a secondary tube arranged on the side wall of the main tube, one end of the secondary tube is in communication with the main tube, and the other end has a fluid inlet, and the fluid inlet is located above the raw water;

[0023] wherein the filling body blocks the discharge channel above the secondary tube.

[0024] In one embodiment, the preset gap is 0.5mm-2.5mm.

[0025] In one embodiment, the distance between the end of the inner electrode close to the fluid outlet and the fluid outlet is 5mm-25mm.

[0026] In one embodiment, an insulating medium layer is coated on the inner electrode, the outer tube is an insulating tube, and the insulating medium layer and the outer tube are made of the same material.

[0027] In one embodiment, the insulating medium layer is made of quartz or polytetrafluoroethylene.

[0028] In one embodiment, the sum of the thickness of the insulating medium layer and the thickness of the outer tube is 1.5mm-2.5mm.

[0029] In one embodiment, the electrode assembly comprises:

[0030] an ion exchange membrane arranged in the container, and the ion exchange membrane separates the container into an anode chamber and a cathode chamber;

[0031] The cathode electrode is located in the cathode chamber and partially in the raw water, and the anode electrode is located in the cathode chamber and partially in the raw water.

[0032] In one embodiment, the power supply component comprises:

[0033] A constant-voltage power supply, a positive electrode of the constant-voltage power supply being electrically connected with the cathode electrode, and a negative electrode of the constant-voltage power supply being electrically connected with the anode electrode; and

[0034] An alternating power supply, a positive electrode of the alternating power supply being electrically connected with the inner electrode, and a negative electrode of the alternating power supply being electrically connected with the cathode electrode.

[0035] In a second aspect, the embodiments of the present application provide an electrode preparation method, characterized in that the method is used for preparing the cathode electrode of the electrolytic device as described above, and the method comprises:

[0036] The carbon black and the polyvinylidene fluoride are dispersed in the organic solvent to form a slurry, wherein the mass ratio of the carbon black to the polyvinylidene fluoride is 9:1.

[0037] The foam nickel is pretreated.

[0038] The slurry is coated on the foam nickel to form the electrode.

[0039] In one embodiment, the carbon black and the polyvinylidene fluoride are dispersed in the organic solvent to form a slurry, wherein the mass ratio of the carbon black to the polyvinylidene fluoride is 9:1, and the method comprises:

[0040] The carbon black and the polyvinylidene fluoride are dispersed in the organic solvent by stirring, and the stirring time is not less than 12 hours.

[0041] In one embodiment, the foam nickel is pretreated, and the method comprises:

[0042] The foam nickel is cut into a preset size.

[0043] The foam nickel is washed by ultrapure water and ethanol and dried.

[0044] In one embodiment, the slurry is coated on the foam nickel to form the electrode, and the method comprises:

[0045] Primary coating is performed to coat the slurry into the pores of the foam nickel.

[0046] Primary drying is performed on the foam nickel to evaporate the organic solvent.

[0047] The primary coating and the primary drying are repeated to form a carbon black layer on the surface of the foam nickel.

[0048] secondary drying, drying the foamed nickel.

[0049] In one embodiment, the applying the slurry on the foamed nickel to form the electrode comprises:

[0050] the temperature of the primary drying is 60℃, and / or

[0051] the temperature of the secondary drying is 120℃, and / or

[0052] the time of the secondary drying is no less than 12 hours.

[0053] In one embodiment, the applying the slurry on the foamed nickel to form the electrode comprises:

[0054] The foamed nickel after the secondary drying is pressed into a sheet and rolled to form a columnar electrode.

[0055] In a third aspect, an embodiment of the present application provides a cleaning device comprising the electrolytic device as described above.

[0056] Compared with the prior art, the embodiment of the present application has the advantages that, by cooperation of the high-voltage discharge assembly and the electrode assembly, the reaction product of the high-voltage discharge assembly reacts with the product of the oxidation-reduction reaction of the electrode assembly to generate an oxidizing active substance, and the entire reaction process does not need to add a catalyst. By the high oxidation-reduction potential of the oxidizing active substance, not only the pesticide residues on the to-be-cleaned articles can be oxidized, but also other organic pollutants on the to-be-cleaned articles can be oxidized, and finally mineralized into carbon dioxide and water, so that the pesticide residues are completely removed. Exemplarily, the nitrogen oxides generated by the high-voltage discharge assembly provide an acidic environment and provide conditions for the formation of peroxynitrite ions, and by the peroxynitrite ions as the oxidizing active substance, the residual pesticides can be non-selectively oxidized and decomposed, so that the refractory pesticides are directly oxidized into inorganic carbon dioxide and water, and secondary pollution can be effectively avoided. In addition, the high-voltage discharge assembly blocks part of the discharge channels by the filler, reduces the escape of nitrogen oxides, makes the nitrogen oxides flow into the raw water as much as possible, provides sufficient raw materials for the formation of peroxynitrite ions, and thus improves the generation rate and amount of peroxynitrite ions. BRIEF DESCRIPTION OF DRAWINGS

[0057] Hereinafter, the present application will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0058] Figure 1 is a structural schematic diagram of an electrolytic device provided by an embodiment of the present application;

[0059] Figure 2 is Figure 1A perspective view of the high-voltage discharge assembly according to the embodiment;

[0060] Figure 3 is Figure 1 A cross-sectional view of the high-voltage discharge assembly according to the embodiment in the front direction;

[0061] Figure 4 is Figure 1 A time-varying trend graph of the removal rate of pesticide residues of the fruit and vegetable cleaned by the electrolysis device according to the embodiment.

[0062] Reference signs:

[0063] 10, container; 20, high-voltage discharge assembly; 210, outer tube body; 2101, main tube part; 2102, auxiliary tube part; 2103, fluid inlet; 2104, fluid outlet; 220, inner electrode; 230, filling body; 240, discharge channel; 250, insulating medium layer; 30, electrode assembly; 310, cathode electrode; 320, anode electrode; 330, ion exchange membrane; 40, power supply assembly; 410, constant-voltage power supply; 420, alternating power supply. DETAILED DESCRIPTION

[0064] The application will be further described below with reference to the accompanying drawings.

[0065] With the increasing concern about food safety, more and more attention is paid to fruit and vegetable cleaning, pesticide residue, food safety and other issues in daily life. Fruit and vegetable cleaning machines are becoming more and more popular as household appliances. The surface of fruits and vegetables usually has pesticide residues, which generally refer to pesticide bodies, toxic metabolites, degradation products and impurities, etc. The existing fruit and vegetable cleaning machines generally clean fruits and vegetables by ultrasonic, electrolytic water, ozone and other methods, but the cleaning technology of the existing fruit and vegetable cleaning machines cannot efficiently and completely remove pesticide residues, and the cleaning effect is not good, which causes safety hazards in the consumption of fruits and vegetables. For example, the fruit and vegetable cleaning machine using ultrasonic technology can only remove the surface dirt of fruits and vegetables by physical method, and the effect of removing pesticide residues is general; the fruit and vegetable cleaning machine using ozone technology has not only unpleasant smell but also affects the health of users, and the cleaning effect is not good, which causes safety hazards in the consumption of fruits and vegetables.

[0066] To solve the above problems, at least one embodiment of the present application provides an electrolytic device, comprising a container 10, a high-voltage discharge assembly 20, an electrode assembly 30 and a power supply assembly 40; the container 10 contains raw water; part of the high-voltage discharge assembly 20 is arranged in the raw water, the high-voltage discharge assembly 20 generates reaction products which flow into the raw water; the electrode assembly 30 comprises a cathode electrode 310 and an anode electrode 320; the power supply assembly 40 is electrically connected with the high-voltage discharge assembly 20 and the electrode assembly 30 respectively; wherein the reaction products react with the products of the electrode assembly 30 to generate cleaning water containing oxidizing active substances to clean the objects to be cleaned.

[0067] As can be seen from the above, by cooperating the high-voltage discharge assembly 20 with the electrode assembly 30, the reaction products of the high-voltage discharge assembly 20 react with the products of the oxidation-reduction reaction of the electrode assembly 30 to generate oxidizing active substances, and the entire reaction process does not need to add a catalyst. By the high oxidation-reduction potential of the oxidizing active substances, not only the pesticides remaining on the objects to be cleaned can be oxidized, but also other organic pollutants on the objects to be cleaned can be oxidized, which are finally mineralized into carbon dioxide and water, so that the pesticide residues are completely removed.

[0068] As shown in Figure 1 , the electrolytic device comprises a container 10, a high-voltage discharge assembly 20, an electrode assembly 30 and a power supply assembly 40; the container 10 contains raw water. It should be noted that the container 10 is made of a material with a resistivity greater than 10 12 Ω / cm, including but not limited to quartz, ceramic, polytetrafluoroethylene. It should be further noted that the raw water refers to water that has not been treated in any way.

[0069] Part of the high-voltage discharge assembly 20 is arranged in the raw water, and the high-voltage discharge assembly 20 generates reaction products which flow into the raw water. It should be noted that the reactant of the high-voltage discharge assembly 20 can be air. By using air as the reactant, the raw material is easy to obtain and the cost is low. At the same time, the oxygen in the air can also participate in the reduction reaction as the reactant of the electrode assembly to improve the yield of hydrogen peroxide.

[0070] The electrode assembly 30 comprises a cathode electrode 310 and an anode electrode 320. It should be noted that the anode electrode 320 can be a platinum electrode, which has excellent catalytic activity and can improve the reaction rate. It should be further noted that the cathode electrode 310 undergoes a reduction reaction of electrons, and the anode electrode 320 undergoes an oxidation reaction of losing electrons. The electrode assembly 30 serves as a reaction field for the oxidation-reduction reaction and a place for supplying electrons.

[0071] The power supply assembly 40 is electrically connected with the high-voltage discharge assembly 20 and the electrode assembly 30 respectively. The power supply assembly 40 supplies power to the high-voltage discharge assembly 20 and the electrode assembly 30, so that the electrode assembly 30 electrolyzes the raw water in the container 10 to provide hydrogen ions and oxygen for the oxidation-reduction reaction.

[0072] The reaction product reacts with the product of the electrode assembly to generate the cleaning water with the oxidation active substance to clean the to-be-cleaned object. It should be noted that the to-be-cleaned object can be fruits and vegetables. The reaction product of the high-voltage discharge assembly 20 reacts with the product of the oxidation-reduction reaction of the electrode assembly 30 to generate the oxidation active substance with high oxidation-reduction potential, and the residual pesticides and organic pollutants can be oxidized without distinction, so that the pesticide residues on the surface of fruits and vegetables are completely removed, and the problem of safety hidden danger in the existing edible fruits and vegetables is solved.

[0073] In some embodiments, the reaction product includes nitrogen oxides, and the nitrogen oxides are dissolved in the raw water to form nitrite ions. It should be noted that the nitrogen oxides in the reaction product are dissolved in the raw water, so that the pH value of the raw water is less than 7, and an acidic environment is provided for the oxidation-reduction reaction occurring on the electrode assembly 30; it should also be noted that the nitrogen oxides are generated from nitrogen and oxygen in the air under high-voltage discharge.

[0074] The product includes hydrogen peroxide, and the hydrogen peroxide is generated by a reduction reaction on the cathode electrode 310. It should be noted that in an acidic environment, oxygen undergoes a two-electron reduction reaction, and oxygen obtains two electrons, and oxygen is reduced to hydrogen peroxide.

[0075] The hydrogen peroxide reacts with the nitrite ions to generate the cleaning water with peroxynitrite ions. It should be noted that the hydrogen peroxide is easily dissolved in water to form peroxide ions, and the peroxide ions combine with the nitrite ions to generate peroxynitrite ions.

[0076] The nitrogen oxides generated by the high-voltage discharge assembly 20 provide an acidic environment, provide conditions for the generation of hydrogen peroxide, and provide reactants for the formation of peroxynitrite ions. By using peroxynitrite ions as oxidation active substances, the residual pesticides can be non-selectively oxidized and decomposed, and the difficult-to-degrade pesticides can be directly oxidized into inorganic carbon dioxide and water, which can effectively avoid secondary pollution.

[0077] In some embodiments, the electrode assembly 30 includes an ion exchange membrane 330, and the ion exchange membrane 330 is arranged in the container 10. The ion exchange membrane 330 divides the container 10 into an anode chamber and a cathode chamber.

[0078] The cathode electrode 310 is located in the cathode chamber and at least partially in the raw water, and the anode electrode 320 is located in the cathode chamber and at least partially in the raw water.

[0079] By the cathode electrode 310 and the anode electrode 320 located in the raw water, a potential difference is formed between the cathode electrode 310 and the anode electrode 320, so that the electrons move directionally, thereby ensuring the progress of the redox reaction.

[0080] As shown in FIG. 1, in some embodiments, the high-voltage discharge assembly 20 includes an outer tube 210, an inner electrode 220, and a filling body 230. The outer tube 210 has a fluid outlet 2104, and the fluid outlet 2104 is arranged in the raw water. It should be noted that the high-voltage discharge assembly 20 uses air as a reactant. It should be further noted that the material of the inner electrode 220 can be copper. Figure 2 、 Figure 3 As shown in FIG. 1, in some embodiments, the high-voltage discharge assembly 20 includes an outer tube 210, an inner electrode 220, and a filling body 230. The outer tube 210 has a fluid outlet 2104, and the fluid outlet 2104 is arranged in the raw water. It should be noted that the high-voltage discharge assembly 20 uses air as a reactant. It should be further noted that the material of the inner electrode 220 can be copper.

[0081] The inner electrode 220 is arranged in the outer tube 210, and a preset gap is formed between the inner electrode 220 and the inner wall of the outer tube 210 to form a discharge channel 240. It should be noted that the material of the inner electrode 220 includes but is not limited to one of copper, tungsten, and carbon fiber. By high-voltage discharge of the inner electrode 220, nitrogen and oxygen in the air form nitrogen oxides in the discharge channel 240.

[0082] The filling body 230 is arranged between the outer tube 210 and the inner electrode 220. It should be noted that the filling body 230 can be an epoxy resin filling body 230, which has insulation and sealing properties. It should be further noted that the filling body 230 fixes the inner electrode 220 in the outer tube 210.

[0083] The filling body 230 blocks part of the discharge channel 240 to make the reaction product flow from the fluid outlet 2104 to the raw water. By blocking part of the discharge channel 240 with the filling body 230, the escape of nitrogen oxides is reduced, so that the nitrogen oxides flow to the raw water as much as possible, thereby providing sufficient raw materials for the formation of peroxynitrite ions, and thus improving the generation rate and amount of peroxynitrite ions.

[0084] In some embodiments, the outer tube 210 includes a main tube portion 2101 and a secondary tube portion 2102. The main tube portion 2101 is coaxially arranged with the inner electrode 220, and the fluid outlet 2104 is located at one end of the main tube portion 2101. By coaxially arranging the main tube portion 2101 with the inner electrode 220, the uniformity of the size of the discharge channel 240 is ensured.

[0085] The auxiliary pipe portion 2102 is arranged on the side wall of the main pipe portion 2101, one end of the auxiliary pipe portion 2102 is in communication with the main pipe portion 2101, and the other end has a fluid inlet 2103, and the fluid inlet 2103 is located above the raw water. It should be noted that the fluid inlet 2103 serves as an air inlet, and a high-pressure pump can be connected to the fluid inlet 2103 to introduce air into the fluid inlet 2103.

[0086] The filling body 230 blocks the discharge channel 240 located above the auxiliary pipe portion 2102.

[0087] In some embodiments, the preset gap is 0.5mm-2.5mm. It should be noted that the size of the preset gap is selected as needed, for example, the preset gap can be 1mm. By setting the size of the preset gap, both the discharge effective current and the occurrence of discharge breakdown are ensured. When the preset gap is less than 0.5mm, the discharge energy and the discharge effective current increase, but the risk of discharge breakdown also increases, which may cause damage to the high-voltage discharge assembly 20; when the preset gap is greater than 2.5mm, the risk of discharge breakdown decreases, but the discharge energy and the discharge effective current also decrease, which may not be enough to generate nitrogen oxides.

[0088] In some embodiments, the distance between the end of the inner electrode 220 close to the fluid outlet 2104 and the fluid outlet 2104 is 5mm-25mm. It should be noted that the distance between the end of the inner electrode 220 close to the fluid outlet 2104 and the fluid outlet 2104 is selected as needed, for example, the distance between the end of the inner electrode 220 close to the fluid outlet 2104 and the fluid outlet 2104 can be 10mm. By setting the distance between the inner electrode 220 and the fluid outlet 2104, the yield of nitrogen oxides is ensured, and the inner electrode 220 is effectively prevented from directly discharging to the raw water in the container 10, which may reduce the yield of nitrogen oxides.

[0089] In some embodiments, the inner electrode 220 is coated with an insulating medium layer 250, the outer pipe body 210 is an insulating pipe, and the material of the insulating medium layer 250 and the outer pipe body 210 is the same. It should be noted that when the inner electrode 220 is coated with the insulating medium layer 250, the material of the inner electrode 220 can only be tungsten. By setting the insulating medium layer 250, the inner electrode 220 is prevented from directly participating in the reaction, thereby prolonging the service life of the inner electrode 220.

[0090] Exemplarily, in some embodiments, the insulating medium layer 250 is made of quartz or polytetrafluoroethylene. The quartz or polytetrafluoroethylene has low cost and good insulation effect as the insulating medium layer 250. Exemplarily, in some embodiments, the sum of the thickness of the insulating medium layer 250 and the thickness of the outer tube body 210 is 1.5 mm-2.5 mm. By setting the sum of the thickness of the insulating medium layer 250 and the thickness of the outer tube body 210, the uniformity of the discharge is ensured, thereby ensuring the generation rate and yield of the nitrogen oxide.

[0091] In some embodiments, the power supply assembly 40 includes a constant voltage power supply 410 and an alternating power supply 420; the positive pole of the constant voltage power supply 410 is electrically connected with the cathode electrode 310, and the negative pole of the constant voltage power supply 410 is electrically connected with the anode electrode 320; the positive pole of the alternating power supply 420 is electrically connected with the inner electrode 220, and the negative pole of the alternating power supply 420 is electrically connected with the cathode electrode 310. It should be noted that the alternating power supply 420 outputs an alternating voltage with an amplitude of 9.5 KV.

[0092] The electrolysis device in the embodiments of the present application has been tested and has good removal rate of pesticide residues. The effect of the electrolysis device in the embodiments of the present application is embodied by a test data as follows:

[0093] 1) Selecting agricultural product samples

[0094] Select agricultural products with the same size, no damage, no pests, and no visible mud and sand adhesion on the surface as test samples, and store them at a temperature of 1°C-5°C for standby. For example, select cherry tomatoes as test samples, and the mass of each sample is in the range of 18±7 g.

[0095] 2) Preparing spiked samples

[0096] Wash the agricultural product samples with pure water, and dry the surface water droplets for standby;

[0097] Prepare spiked samples by spraying pesticides on the agricultural product samples, and dry them at a temperature of 25°C±5°C and a wind speed of 1 m / s-2 m / s, so that the surface of the agricultural product samples has no liquid droplets. For example, prepare spiked samples of cherry tomatoes, and the sprayed pesticide can be dichlorvos. The pesticide concentration on the surface of the spiked sample of cherry tomatoes should meet the requirements of the following table:

[0098] Agricultural products Pesticides Spiked sample concentration (mg / kg) Cherry tomatoes Dichlorvos 0.2×(1.5±0.5)

[0099] 3) Cleaning the spiked samples

[0100] Put two spiked samples with a mass of 100 g±10 g into the anode chamber, and run the electrolysis device for one hour. After the electrolysis device is stopped, dry the cleaned spiked samples at a temperature of 25°C±5°C and a wind speed of 1 m / s-2 m / s, so that the surface of the spiked samples has no liquid droplets.

[0101] 4) Pesticide residue value measurement

[0102] After the dried spiked sample is crushed and mixed uniformly by a tissue crusher, the test is performed according to the regulations, for example, the test can be performed according to the regulations in GB 2763-2019. The related results are shown in Table 1. Figure 4 As shown in Table 1, with the increase of the washing time, the washing effect gradually improves, and at the 10th minute, the cypermethrin removal rate reaches more than 90%, so the efficiency of the electrolytic device in the embodiment of the present application for removing pesticide residues is high and the effect is good.

[0103] As can be seen from the above, by cooperating the high-voltage discharge assembly 20 with the electrode assembly 30, the product of the redox reaction of the reactants of the high-voltage discharge assembly 20 and the electrode assembly 30 is used to generate oxidizing active substances, and the entire reaction process does not need to add a catalyst. Through the high oxidation-reduction potential of the oxidizing active substances, not only the pesticides remaining on the objects to be washed can be oxidized, but also other organic pollutants on the objects to be washed can be oxidized, and they are finally mineralized into carbon dioxide and water, so that the pesticide residues are completely removed. Illustratively, the nitrogen oxides generated by the high-voltage discharge assembly 20 provide an acidic environment, which provides conditions for the formation of peroxynitrite ions. By using peroxynitrite ions as oxidizing active substances, the remaining pesticides can be non-selectively oxidized and decomposed, so that the difficult-to-degrade pesticides are directly oxidized into inorganic carbon dioxide and water, which can effectively avoid secondary pollution. In addition, the high-voltage discharge assembly 20 blocks part of the discharge channels 240 by the filler 230, reduces the escape of nitrogen oxides, and makes the nitrogen oxides flow into the raw water as much as possible, so as to provide sufficient raw materials for the formation of peroxynitrite ions, thereby improving the generation rate and amount of peroxynitrite ions.

[0104] At least one embodiment of the present application also provides an electrode preparation method for the cathode electrode of the electrolytic device described in any embodiment of the present application, and the method comprises:

[0105] 1) dispersing carbon black and polyvinylidene fluoride in an organic solvent to form a slurry, wherein the mass ratio of carbon black to polyvinylidene fluoride is 9:1. It should be noted that the organic solvent can be an isopropanol solution.

[0106] In some embodiments, the carbon black and polyvinylidene fluoride are dispersed in an organic solvent to form a slurry, wherein the mass ratio of carbon black to polyvinylidene fluoride is 9:1, comprising:

[0107] The carbon black and polyvinylidene fluoride are dispersed in the organic solvent by stirring and dispersing, and the stirring time is not less than 12 hours. It should be noted that isopropanol solution can be added during the stirring and dispersing process to ensure that the slurry has a certain viscosity.

[0108] 2) Pretreatment of the foamed nickel.

[0109] In some embodiments, the foamed nickel is pretreated, including cutting the foamed nickel into a preset size; and washing the foamed nickel with ultrapure water and ethanol and drying. It should be noted that the preset size of the foamed nickel can be 25 cm x 7 cm. It should be further noted that the foamed nickel has a three-dimensional grid structure, has a large specific surface area and high mechanical strength, and using the foamed nickel as a substrate is conducive to improving the catalytic activity of the electrode.

[0110] 3) Coating a slurry on the foamed nickel to form an electrode.

[0111] In some embodiments, the slurry is coated on the foamed nickel to form an electrode, including:

[0112] primary coating, to coat the slurry into the pores of the foamed nickel;

[0113] primary drying, to dry the foamed nickel to evaporate the organic solvent;

[0114] repeating the primary coating and the primary drying to form a carbon black layer on the surface of the foamed nickel;

[0115] secondary drying, to dry the foamed nickel.

[0116] By repeating the coating and drying process, the adhesion of the carbon black to the foamed nickel is improved, so as to avoid falling off during the reaction, thereby ensuring the catalytic activity of the electrode and ensuring that the carbon black fills and compacts the pores in the foamed nickel.

[0117] In some embodiments, the slurry is coated on the foamed nickel to form an electrode, including:

[0118] The temperature of the primary drying is 60°C, and / or the temperature of the secondary drying is 120°C, and / or the time of the secondary drying is not less than 12 hours.

[0119] In some embodiments, the slurry is coated on the foamed nickel to form an electrode, including:

[0120] The foamed nickel after the secondary drying is pressed and curled to form an electrode in the form of a columnar body.

[0121] The specific preparation process is as follows:

[0122] 1) Carbon black and polyvinylidene fluoride are dispersed in an isopropyl alcohol solution in a mass ratio of 9:1 by stirring paddle to form a slurry, and the stirring time is 12 h; it should be noted that the carbon black is purchased from the American brand of Cabot, and the model number is VXC72;

[0123] 2) The foamed nickel is cut into 25 cm x 7 cm, and the foamed nickel is washed with ultrapure water and ethanol and dried;

[0124] 3) The slurry prepared in step 1) is coated into the pores of the foamed nickel obtained in step 2), and after the pores are filled with the slurry, the foamed nickel is placed into an oven at 60°C to dry to evaporate the isopropyl alcohol solution;

[0125] 4) Step 3) is repeated to form a carbon black layer on the surface of the foamed nickel;

[0126] 5) The foamed nickel after step 4) is placed into an oven at 120°C to dry for 12 hours;

[0127] 6) The foamed nickel after step 5) is taken out, and the foamed nickel is pressed and coiled to form an electrode in the shape of a column.

[0128] As can be seen from the above, by using foamed nickel as a substrate and filling the foamed nickel with carbon black, the catalytic activity is high when used as an electrode, on the one hand, the specific surface area is increased, and on the other hand, the electrical conductivity is enhanced, the charge transfer speed is accelerated, the generation rate and yield of hydrogen peroxide are improved, the production rate and yield of peroxynitrite ions are improved, and the cleaning effect is ensured.

[0129] In a third aspect, an embodiment of the present application provides a cleaning device, which comprises the electrolytic device as described above.

[0130] As can be seen from the above, the disinfection device comprises the electrolytic device according to any of the embodiments of the present application, and thus has all the technical effects brought by the technical solutions of the above embodiments.

[0131] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrolysis apparatus, characterized in that, include: A container containing raw water; A high-voltage discharge component is partially disposed in the raw water, wherein the high-voltage discharge component generates reaction products and the reaction products flow into the raw water; An electrode assembly, comprising a cathode electrode and an anode electrode; as well as A power supply assembly, which is electrically connected to the high-voltage discharge assembly and the electrode assembly, respectively; The reaction products react with the products of the electrode assembly to generate cleaning water containing oxidizing active substances to clean the items to be cleaned. The reaction products include nitrogen oxides, which dissolve in the original water to form nitrite ions; The product includes hydrogen peroxide, which is generated by a reduction reaction on the cathode electrode. The hydrogen peroxide reacts with the nitrite ions to generate cleaning water containing peroxynitrite ions. The high-voltage discharge assembly includes: The outer pipe has a fluid outlet, and the fluid outlet is located within the raw water. An inner electrode is disposed within the outer tube, and a predetermined gap exists between the inner electrode and the inner wall of the outer tube to form a discharge channel; and A filler body is disposed between the outer tube and the inner electrode; The filler partially blocks the discharge channel, allowing the reaction products to flow from the fluid outlet into the raw water. The electrode assembly includes: An ion exchange membrane is disposed inside the container, and the ion exchange membrane separates the container into an anode chamber and a cathode chamber. The cathode electrode is located in the cathode chamber and partially within the raw water, and the anode electrode is located in the anode chamber and partially within the raw water.

2. The electrolysis apparatus according to claim 1, characterized in that, The outer tube body includes: The main body is coaxially arranged with the inner electrode, and the fluid outlet is located at one end of the main body; A secondary pipe section is disposed on the side wall of the main pipe section. One end of the secondary pipe section is connected to the main pipe section and the other end has a fluid inlet, and the fluid inlet is located above the raw water. The filler blocks the discharge channel located above the secondary tube.

3. The electrolysis apparatus according to claim 1, characterized in that, The preset gap is 0.5mm-2.5mm.

4. The electrolysis apparatus according to claim 1, characterized in that, The distance between the end of the internal electrode closest to the fluid outlet and the fluid outlet is 5mm-25mm.

5. The electrolysis apparatus according to claim 1, characterized in that, The inner electrode is covered with an insulating dielectric layer, and the outer tube is an insulating tube. The insulating dielectric layer and the outer tube are made of the same material.

6. The electrolysis apparatus according to claim 5, characterized in that, The insulating dielectric layer is made of quartz or polytetrafluoroethylene.

7. The electrolysis apparatus according to claim 5, characterized in that, The sum of the thickness of the insulating dielectric layer and the thickness of the outer tube is 1.5mm-2.5mm.

8. The electrolysis apparatus according to any one of claims 1-7, characterized in that, The power supply component includes: A constant voltage power supply, wherein the positive terminal of the constant voltage power supply is electrically connected to the cathode electrode, and the negative terminal of the constant voltage power supply is electrically connected to the anode electrode; and An alternating power supply, wherein the positive terminal of the alternating power supply is electrically connected to the inner electrode, and the negative terminal of the alternating power supply is electrically connected to the cathode electrode.

9. A cleaning device, characterized in that, Includes the electrolysis apparatus as described in any one of claims 1-8.

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