Clean hydrogen peroxide preparation and water treatment device
By setting up a connecting pipe between the anode and cathode end plates to connect the anode and cathode chambers, the oxygen generated in the anode chamber is directly reduced to hydrogen peroxide under the catalyst of the cathode plate, which solves the problem of limited oxygen diffusion and realizes the low-cost and high-efficiency preparation of high-purity hydrogen peroxide.
Patent Information
- Application Number
- CN202511047918.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2025-11-04
AI Technical Summary
In existing electrolytic devices for the electrochemical preparation of hydrogen peroxide, the anion and cation chambers are separated by an ion exchange membrane, which makes it difficult for oxygen to diffuse to the cathode, resulting in limited mass transfer, increased costs, and reduced preparation efficiency.
By setting up a connecting pipe between the outlet of the anode plate and the inlet of the cathode plate, the anode and cathode chambers are connected. The oxygen generated in the anode chamber is directly reduced to hydrogen peroxide under the action of the catalyst on the cathode plate, avoiding the need to actively add oxygen to the cathode chamber and using high-purity water as raw material.
This solves the problem of oxygen diffusion, reduces costs, and improves the controllability and processing efficiency of preparing high-purity hydrogen peroxide, thus achieving low-cost preparation of high-purity hydrogen peroxide.
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Figure CN120888950A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electrochemical treatment, in particular to a clean hydrogen peroxide preparation and water treatment device. BACKGROUND
[0002] Electrochemical redox reaction is a new technology for directly synthesizing hydrogen peroxide (H2O2) from water and oxygen. However, in the existing electrolytic device for electrochemical preparation of hydrogen peroxide, the cathode chamber and the anode chamber are separated by an ion exchange membrane, so there is a problem of limited mass transfer (especially the difficulty of oxygen diffusion to the cathode). Therefore, the general practice is to introduce oxygen into the cathode chamber from the gas source outside the electrolytic device, which makes it difficult to further reduce the cost of the electrolytic device. SUMMARY
[0003] The present application provides a clean hydrogen peroxide preparation and water treatment device to solve at least one of the above technical problems.
[0004] The present application provides a clean hydrogen peroxide preparation and water treatment device, comprising a first water tank and an electrochemical module, the electrochemical module comprising an anode end plate, an anode plate, a proton membrane, a cathode plate and a cathode end plate arranged in sequence, the anode plate and the proton membrane defining an anode chamber, the proton membrane and the cathode plate defining a cathode chamber, and the cathode chamber generating hydrogen peroxide through a reaction.
[0005] The water inlet of the anode end plate is connected to the first water tank, wherein the water outlet of the anode end plate is connected to the water inlet of the cathode end plate through a connecting pipeline.
[0006] In one embodiment, the cathode plate and the anode plate are both titanium plates coated with a noble metal catalyst, and the noble metal is ruthenium, ruthenium-iridium alloy or platinum.
[0007] In one embodiment, a gasket is arranged between the anode end plate and the anode plate, between the anode plate and the proton membrane, between the proton membrane and the cathode plate, and between the cathode plate and the cathode end plate.
[0008] In one embodiment, the connecting pipeline is also connected to a pH adjusting device near the water inlet end of the cathode end plate, and the pH adjusting device is used to add acid, base or neutral salt to the cathode chamber.
[0009] In one embodiment, a second water tank is further included, which is connected to the water outlet of the cathode end plate and used to collect the hydrogen peroxide generated in the cathode chamber.
[0010] In one embodiment, a catalytic reaction degradation tower is further included, a catalyst filler is arranged in the catalytic reaction degradation tower, a water inlet at the bottom of the catalytic reaction degradation tower is connected with the water outlet of the cathode end plate, and a water outlet at the top of the catalytic reaction degradation tower is used to discharge qualified water.
[0011] In one embodiment, a third water tank is further included, and the third water tank is connected with the water inlet at the bottom of the catalytic reaction degradation tower.
[0012] Compared with the prior art, the advantages of the present application are that, since the water outlet of the anode end plate is connected with the water inlet of the cathode end plate through a connecting pipeline, the anode chamber and the cathode chamber are communicated through the connecting pipeline, so that the oxygen generated in the anode chamber enters the cathode end plate along with the water, i.e., enters the cathode chamber, and the oxygen in the cathode chamber is subjected to O2 reduction reaction under the action of the cathode plate catalyst to generate hydrogen peroxide. Therefore, the present application solves the problem that oxygen is difficult to diffuse to the cathode in the prior art, and there is no need to actively add oxygen to the cathode chamber, but the oxygen generated in the anode chamber is directly flowed to the cathode chamber, which solves the oxygen matching problem, the high-purity fresh oxygen generated in the anode chamber is more active, the controllability problem of preparing high-purity hydrogen peroxide is solved by using high-purity water as raw material, the cost of the clean hydrogen peroxide preparation and water treatment device of the present application is lower, and the treatment efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS
[0013] Hereinafter, the present application will be described in more detail based on the embodiments and with reference to the accompanying drawings.
[0014] Figure 1 is a structural schematic diagram of the clean hydrogen peroxide preparation and water treatment device in Example 1 of the present application;
[0015] Figure 2 is a structural schematic diagram of the electrochemical module shown in Figure 1 ;
[0016] Figure 3 is a structural schematic diagram of the anode plate shown in Figure 2 ;
[0017] Figure 4 is a structural schematic diagram of the cathode plate shown in Figure 2 ;
[0018] Figure 5 is a structural schematic diagram of the clean hydrogen peroxide preparation and water treatment device in Example 2 of the present application;
[0019] Figure 6 is a structural schematic diagram of the clean hydrogen peroxide preparation and water treatment device in Example 3 of the present application;
[0020] Figure 7is a structural schematic diagram of a clean hydrogen peroxide preparation and water treatment device in embodiment 4 of the present application.
[0021] Reference signs:
[0022] 1, first water tank; 2, electrochemical module; 3, second water tank; 4, pH adjusting device; 5, catalytic reaction degradation tower; 6, third water tank; 7, direct current power supply;
[0023] 21, anode end plate; 22, anode plate; 23, proton membrane; 24, cathode plate; 25, cathode end plate; 26, gasket; 27, connecting pipeline; 221, anode plate terminal; 241, cathode plate terminal;
[0024] 11, pure water pump; 41, metering tank; 51, catalyst filler; 42, metering pump; 61, waste water pump. DETAILED DESCRIPTION
[0025] The present application will be further described below with reference to the accompanying drawings.
[0026] The present application provides a clean hydrogen peroxide preparation and water treatment device, more specifically, a high-purity hydrogen peroxide preparation device. The clean hydrogen peroxide preparation and water treatment device of the present application is to directly synthesize hydrogen peroxide (hydrogen peroxide) by directly using oxygen (O2) generated in the anode chamber through the electrochemical method, so that the clean hydrogen peroxide preparation and water treatment device of the present application has the characteristics of environmental friendliness (mild reaction conditions, clean electric energy, main consumption of O2 and H2O), distributed production potential (small-scale production near the use point) and avoiding the complex steps and organic solvents of the traditional anthraquinone method for preparing hydrogen peroxide.
[0027] Example 1
[0028] As shown in Figure 1 and Figure 2 , the clean hydrogen peroxide preparation and water treatment device of the present application includes a first water tank 1, an electrochemical module 2 and a second water tank 3, wherein the first water tank 1 is a pure water tank or a high-purity water tank, which carries pure water or high-purity water (H2O without impurities). The second water tank 3 is hydrogen peroxide, which can collect hydrogen peroxide generated in the electrochemical module 2.
[0029] As shown in Figure 2 , the electrochemical module 2 includes an anode end plate 21, an anode plate 22, a proton membrane 23, a cathode plate 24 and a cathode end plate 25 arranged in sequence. The anode end plate 21, the anode plate 22, the proton membrane 23, the cathode plate 24 and the cathode end plate 25 can be configured as plate-shaped members of the same size, which can be formed into a whole by pressure bonding.
[0030] The anode plate 22 and the proton membrane 23 define an anode chamber where oxidation reaction occurs, and the anode end plate 21 is in communication with the anode chamber. The proton membrane 23 and the cathode plate 24 define a cathode chamber where reduction reaction occurs, and the cathode chamber is in communication with the cathode end plate 25. In addition, the gaskets 26 are arranged between the anode end plate 21 and the anode plate 22, between the anode plate 22 and the proton membrane 23, between the proton membrane 23 and the cathode plate 24, and between the cathode plate 24 and the cathode end plate 25. The gaskets 26 are also compressed together with the above-mentioned components, thereby ensuring the sealing of the anode chamber and the cathode chamber. The above-mentioned components can be compressed and formed into a sealed whole by the connecting pieces penetrating through the anode end plate 21, the anode plate 22, the proton membrane 23, the cathode plate 24, the cathode end plate 25 and the gaskets 26, so that fluid can flow therein.
[0031] The water inlet of the anode end plate 21 is connected with the first water tank 1, as shown in Figure 1 The water inlet of the anode end plate 21 is connected with the first water tank 1, as shown in
[0032] The water outlet of the cathode end plate 25 is connected with the second water tank 3, and the water outlet of the anode end plate 21 is connected with the water inlet of the cathode end plate 25 through the connecting pipe 27. The hydrogen peroxide produced in the cathode chamber is input into the second water tank 3 through the water outlet of the cathode end plate 25.
[0033] As shown in Figure 3 and Figure 4 The anode plate 22 is provided with the anode plate connecting posts 221, and the cathode plate 24 is provided with the cathode plate connecting posts 241. Each anode plate connecting post 221 is connected with the positive pole of the direct current power supply 7, and each cathode plate connecting post 241 is connected with the negative pole of the direct current power supply 7. When the anode plate 22 and the cathode plate 24 are connected with the positive pole and the negative pole of the direct current power supply 7, respectively, the water input into the anode chamber from the first water tank 1 will be oxidized (electrolysis of water) at the interface of the anode plate 22, thereby producing oxygen (O2). Since the water outlet of the anode end plate 21 is connected with the water inlet of the cathode end plate 25 through the connecting pipe 27, the anode chamber and the cathode chamber are connected through the connecting pipe 27, so that the oxygen produced in the anode chamber will enter the cathode end plate 25 together with the water, i.e. enter the cathode chamber. The oxygen will be reduced to produce hydrogen peroxide (H2O2) under the action of the cathode plate 24 in the cathode chamber.
[0034] Since the prior art electrolytic device separates the cathode chamber and the anode chamber by an ion exchange membrane, there is a problem of limited mass transfer (especially, oxygen is difficult to diffuse to the cathode). In the present application, the anode end plate 21 and the cathode end plate 25 are connected by the connecting pipeline 27, so that the oxygen generated in the anode chamber can flow from the anode chamber to the cathode chamber with pure water through the connecting pipeline 27, so that the reduction reaction can occur in the cathode chamber to generate hydrogen peroxide. Therefore, the present application directly uses the oxygen generated in the anode chamber of the clean hydrogen peroxide preparation and water treatment device to solve the problem that oxygen is difficult to diffuse to the cathode in the prior art, and there is no need to actively add oxygen to the cathode chamber from the gas source outside the device. Instead, the oxygen generated in the anode chamber is directly flowed to the cathode chamber, so that the clean hydrogen peroxide preparation and water treatment device of the present application does not need to set up oxygen source and other components, so the cost is lower and the processing efficiency is higher. In addition, the clean hydrogen peroxide preparation and water treatment device of the present application also solves the oxygen matching problem, because the present application directly uses the high-purity fresh oxygen generated in the anode chamber, which is more active, and the raw material is high-purity water in the first water tank 1, so as to solve the controllability problem of preparing high-purity hydrogen peroxide.
[0035] Further, the water outlet of the anode end plate 21 is located at the upper end of the anode end plate 21, and the water inlet of the anode end plate 21 is located at the lower end of the anode end plate 21. The anode end plate 21 can also be provided with a flow channel, which can be a groove or a hole opened on the surface of the anode end plate 21, which is in communication with the water outlet of the anode end plate 21 and the water inlet of the anode end plate 21, and is used to guide the flow of water flow.
[0036] Similarly, the water outlet of the cathode end plate 25 is located at the upper end of the cathode end plate 25, and the water inlet of the cathode end plate 25 is located at the lower end of the cathode end plate 25. The cathode end plate 25 can also be provided with a flow channel, which can be a groove or a hole opened on the surface of the cathode end plate 25, which is in communication with the water outlet of the cathode end plate 25 and the water inlet of the cathode end plate 25, and is used to guide the flow of water flow.
[0037] The water inlet of the anode end plate 21 is connected with the first water tank 1, the water outlet of the anode end plate 21 is connected with the water inlet of the cathode end plate 25 through the connecting pipeline 27, and the water outlet of the cathode end plate 25 is connected with the second water tank 3, so that the pure water enters from the lower part of the anode end plate 21, and flows through the anode end plate 21 from bottom to top through the flow channel on the anode end plate 21, so that the reaction can occur in the anode chamber. Correspondingly, the water after the reaction in the anode chamber enters the water outlet of the anode end plate 21 from the upper part, and enters the water inlet of the cathode end plate 25 from the lower part, and flows through the cathode end plate 25 from bottom to top through the flow channel on the cathode end plate 25, so that the reaction can occur in the cathode chamber. The flow path of the above-mentioned water flow not only can bring the oxygen generated in the anode chamber into the cathode chamber, but also can increase the path of the pure water flowing through the anode end plate 21 and the cathode end plate 25, and increase the time of the pure water staying in the cathode chamber, so as to improve the conversion rate of hydrogen peroxide.
[0038] Furthermore, both the cathode plate 24 and the anode plate 22 are titanium plates coated with a noble metal catalyst, such as ruthenium, ruthenium-iridium alloy, or platinum. Therefore, the oxygen generated in the anode chamber enters the cathode chamber along with the water. In the cathode chamber, under the action of the catalyst coated on the cathode plate, the oxygen undergoes an O2 reduction reaction to produce hydrogen peroxide.
[0039] Therefore, the proton exchange membrane 23 is located between the anode plate 22 and the cathode plate 24, so the cations (H+) that undergo oxidation (electrolysis of water) at the interface of the anode plate 22 in the cation chamber... + It can pass through the proton membrane 23 and enter the negative chamber. The water in the negative chamber undergoes an O2 reduction reaction to produce hydrogen peroxide (H2O2).
[0040] Understandably, the hydrogen peroxide preparation and water treatment device in this embodiment 1 mainly involves the preparation of hydrogen peroxide, and its treatment can be regarded as simply collecting hydrogen peroxide into the second water tank 3.
[0041] Example 2
[0042] like Figure 5 As shown, based on the above embodiment 1, the present invention also provides a modified embodiment 2.
[0043] In this second embodiment, the differences between this second embodiment and the first embodiment described above will be explained in detail, while the similarities will not be repeated.
[0044] In this embodiment 2, a pH adjusting device 4 is also connected to the water inlet end of the connecting pipe 27 near the cathode end plate. The pH adjusting device 4 is used to add acid or alkali solution to the anion chamber. The pH adjusting device 4 includes a metering tank 41 containing acid, alkali or neutral salt and a metering pump 42 connected to the metering tank 41. The metering pump 42 can pump the acid or alkali solution in the metering tank 41 into the water inlet end of the connecting pipe 27 near the cathode end plate, so that it enters the anion chamber together with pure water and oxygen.
[0045] The acid solution carried in the metering tank 41 can be, for example, H2SO4 solution; the alkaline solution carried in the metering tank 41 can be, for example, NaOH or KOH solution; and the neutral salt carried in the metering tank 41 can be, for example, Na2SO4, KHCO3, etc.
[0046] The reaction in the cathode chamber is essentially a process in which oxygen gains electrons on the surface of the cathode plate 24 and is reduced to hydrogen peroxide (H2O2). This reaction can proceed via a two-electron or four-electron pathway.
[0047] For example, NaOH or KOH solution can be added to the anion chamber to create an alkaline environment. In this case, the reaction in the anion chamber follows a two-electron pathway (the target reaction): O₂ + H₂O + 2e⁻ - →HO2-+OH-; or the four-electron pathway (competitive reaction): O2+2H2O+4e - →4OH-.
[0048] The two-electron oxygen reduction reaction described above is more kinetically favorable in an alkaline medium, and by placing the anion chamber in an alkaline environment, the H2O2 produced in the anion chamber can be relatively stable in an alkaline environment (existing in the form of HO2-).
[0049] Alternatively, H2SO4 solution can be added to the anion chamber to create an acidic environment. In this case, the reaction in the anion chamber follows a two-electron pathway (the target reaction): O2 + 2H+ + +2e - →H2O2; or the four-electron pathway (competitive reaction): O2 + 4H + +4e - →2H2O.
[0050] In an acidic environment, H₂O₂ can be directly produced, so the product does not require conversion, and some catalysts are more stable in acidic conditions. However, the kinetics of the above two-electron oxygen reduction reaction are generally slow, and the requirements for the catalyst are more stringent.
[0051] Alternatively, the anion chamber can be placed in a neutral solution, such as by adding Na2SO4 or KHCO3, which would be more suitable for various applications.
[0052] The cathode plate 24 is coated with a noble metal catalyst (such as ruthenium, iridium, etc.), which can greatly enhance the two-electron O2 reduction reaction and suppress the four-electron pathway (water production) to the greatest extent. When pure water flows through the cation chamber, the oxygen produced is also carried into the anion chamber, where a reduction reaction occurs to produce hydrogen peroxide.
[0053] Understandably, the hydrogen peroxide preparation and water treatment device in this embodiment 2 mainly involves the preparation of hydrogen peroxide, and its treatment can be regarded as simply collecting hydrogen peroxide into the second water tank 2.
[0054] Example 3
[0055] like Figure 6 As shown, based on the above embodiment 2, the present invention also provides a modified embodiment 3.
[0056] In this embodiment 3, the differences between this embodiment 3 and the above-mentioned embodiments 1 and 2 will be described in detail, and the similarities will not be repeated.
[0057] In the embodiment 3, the water outlet of the cathode end plate 25 is not connected with the second water tank 3, but is connected with the catalytic reaction degradation tower 5. The catalytic reaction degradation tower 5 is provided with a catalyst filler 51, which includes a carrier and a catalyst. The carrier is spherical alumina, and the catalyst is manganese dioxide, iron or copper.
[0058] The bottom of the catalytic reaction degradation tower 5 is provided with a water inlet, which is connected with the water outlet at the upper part of the cathode end plate 25, so that the hydrogen peroxide generated in the cathode chamber of the electrochemical module 2 can enter the catalytic reaction degradation tower 5 to treat the wastewater therein. Because the hydrogen peroxide can react with the COD in the wastewater under the action of the catalyst in the catalytic reaction degradation tower 5 to generate a high-efficiency oxidation degradation reaction, the organic matter in the wastewater can be treated by oxidation degradation, so that the removal rate of the COD in the wastewater can be greatly improved.
[0059] As shown in Figure 6 , the top of the catalytic reaction degradation tower 5 is provided with a water outlet, and the treated water meeting the discharge requirements is discharged from the water outlet at the top of the catalytic reaction degradation tower 5.
[0060] It can be understood that the clean hydrogen peroxide preparation and water treatment device in the embodiment 3 mainly prepares and treats hydrogen peroxide, and the treatment of the hydrogen peroxide is to introduce it into the catalytic reaction degradation tower 5 for further treatment of the wastewater.
[0061] Example 4
[0062] As shown in Figure 7 , on the basis of the above-mentioned embodiment 3, the application further provides a modified embodiment 4.
[0063] In the embodiment 4, the differences between the embodiment 4 and the above-mentioned embodiment 3 will be described in detail, and the same parts will not be described again.
[0064] In the embodiment 4, the water inlet at the bottom of the catalytic reaction degradation tower 5 is also connected with the third water tank 6, which can be a wastewater tank. A wastewater pump 61 is arranged on the pipeline connecting the water inlet at the bottom of the catalytic reaction degradation tower 5 with the third water tank 6. The wastewater pump 61 can pump the wastewater in the third water tank 6 into the catalytic reaction degradation tower 5. The wastewater passes through the catalyst filler 51 in the catalytic reaction degradation tower 5 from bottom to top, and under the action of the catalyst filler 51, the hydrogen peroxide reacts with the COD in the wastewater to generate a high-efficiency oxidation degradation reaction, so that the organic matter in the wastewater can be treated by oxidation degradation.
[0065] It can be understood that the clean hydrogen peroxide preparation and water treatment device in the embodiment 4 mainly prepares and treats hydrogen peroxide, and the treatment of the hydrogen peroxide is to introduce it into the catalytic reaction degradation tower 5 for further treatment of the wastewater.
[0066] While the present application has been described with reference to the preferred embodiments, it is to be understood that various modifications can change the scope of the present application and that such changes are to be within the scope of the embodiments. In particular, the technical features mentioned in the various 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. A device for producing and treating clean hydrogen peroxide water, characterized by comprising: a hydrogen peroxide water production unit; a hydrogen peroxide water treatment unit; and a hydrogen peroxide water storage unit. The application relates to a water treatment device, which comprises: a first water tank, which is a pure water tank; and an electrochemical module, which comprises an anode end plate, an anode plate, a proton membrane, a cathode plate and a cathode end plate arranged in sequence, the anode plate and the proton membrane defining an anode chamber, the proton membrane and the cathode plate defining a cathode chamber, and a reaction for generating hydrogen peroxide occurring in the cathode chamber; a water inlet of the anode end plate being connected with the first water tank, wherein a water outlet of the anode end plate is connected with a water inlet of the cathode end plate through a connecting pipeline.
2. The apparatus for producing and treating clean hydrogen water according to claim 1, wherein The anode plate and the cathode plate are both titanium plates coated with a noble metal catalyst, and the noble metal is ruthenium, ruthenium-iridium alloy or platinum.
3. The apparatus for producing and treating clean hydrogen water according to claim 1 or 2, wherein Gaskets are arranged between the anode end plate and the anode plate, between the anode plate and the proton membrane, between the proton membrane and the cathode plate and between the cathode plate and the cathode end plate.
4. The apparatus for producing and treating clean hydrogen water according to claim 1 or 2, wherein The connecting pipeline is also connected with a pH adjusting device near the water inlet end of the cathode end plate, and the pH adjusting device is used for adding acid, alkali or neutral salt into the cathode chamber.
5. The apparatus for producing and treating clean hydrogen water according to claim 1 or 2, wherein The application further comprises a second water tank, which is connected with a water outlet of the cathode end plate and used for collecting the hydrogen peroxide generated in the cathode chamber.
6. The apparatus for producing and treating clean hydrogen water according to claim 1 or 2, wherein The application further comprises a catalytic reaction degradation tower, which is provided with a catalyst filler, and a water inlet at the bottom of the catalytic reaction degradation tower is connected with the water outlet of the cathode end plate, and a water outlet at the top of the catalytic reaction degradation tower is used for discharging qualified water.
7. The apparatus for producing and treating clean hydrogen water according to claim 6, wherein The application further comprises a third water tank, which is connected with the water inlet at the bottom of the catalytic reaction degradation tower.