阅读说明：本技术 一种串联流动式过氧化氢电化学产生装置 (Series flow type hydrogen peroxide electrochemical generation device ) 是由 杨帆 陈志华 龙毅 于 2021-09-14 设计创作，主要内容包括：本发明公开一种串联流动式过氧化氢电化学产生装置,设有氧气电化学发生器和过氧化氢电化学发生器,所述氧气电化学发生器与所述过氧化氢电化学发生器串联,使得电解液经过氧气电化学发生器反应后再进入过氧化氢电化学发生器。本发明的串联流动式过氧化氢电化学产生装置将氧气电化学发生器和过氧化氢电化学发生器串联在一起,通过电解水反应提升电解液中的溶解氧浓度,推动过氧化氢电化学发生器发生的电解产生过氧化氢反应H-(2)+0.5O-(2)→H-(2)O-(2)的反应平衡向着右侧产生过氧化氢的方向移动,从而提升过氧化氢电化学发生器产生的过氧化氢溶液的浓度,设计简单,生产效率高。(The invention discloses a series flow type hydrogen peroxide electrochemical generation device which is provided with an oxygen electrochemical generator and a hydrogen peroxide electrochemical generator, wherein the oxygen electrochemical generator is connected with the hydrogen peroxide electrochemical generator in series, so that electrolyte enters the hydrogen peroxide electrochemical generator after the electrolyte reacts with the oxygen electrochemical generator. The series flow type hydrogen peroxide electrochemical generation device of the invention connects the oxygen electrochemical generator and the hydrogen peroxide electrochemical generator in series, improves the dissolved oxygen concentration in the electrolyte through the electrolytic water reaction, promotes the hydrogen peroxide electrochemical generator to generate hydrogen peroxide through electrolysis 2 +0.5O 2 →H 2 O 2 The reaction equilibrium of (2) is shifted towards the direction of generating hydrogen peroxide on the right side, thereby promoting the generation of the hydrogen peroxide electrochemical generatorThe concentration of the hydrogen peroxide solution is simple in design and high in production efficiency.)

1. The series flow type hydrogen peroxide electrochemical generation device is characterized by being provided with an oxygen electrochemical generator (1) and a hydrogen peroxide electrochemical generator (2), wherein the oxygen electrochemical generator (1) is connected with the hydrogen peroxide electrochemical generator (2) in series, so that electrolyte enters the hydrogen peroxide electrochemical generator (2) after being reacted by the oxygen electrochemical generator (1).

2. The electrochemical generation apparatus of series flowing hydrogen peroxide as claimed in claim 1, wherein the electrochemical generator of oxygen (1) is provided with a housing (11), an electrolyte chamber (111) is provided in the housing (11), a water inlet (112) and a water outlet (113) are respectively provided at two ends of the housing (11), a cathode electrode (12), an insulating separator (13), an anode electrode (14) and a spoiler (15) are sequentially provided in the electrolyte chamber (111) from the water inlet (112) side to the water outlet (113) side, the insulating separator (13) separates the cathode electrode (12) and the anode electrode (14), and the spoiler (15) is used for increasing the electrolyte eddy.

3. The in-line flow type hydrogen peroxide electrochemical generation apparatus according to claim 2, wherein the insulating partition means (13) is a porous flat plate-like partition means made of an insulating material, and the insulating material is one of ceramics, plastics, glass, and glass fibers.

4. The in-line flow type hydrogen peroxide electrochemical generator according to claim 2, wherein the two or more spoilers (15) are flat plates, and the two or more spoilers (15) are disposed opposite to each other and staggered with each other to form a meandering flow path for meandering electrolyte.

5. The in-line flow type hydrogen peroxide electrochemical generation apparatus according to claim 2, wherein the spoiler (15) is a perforated plate or a plate made of a three-dimensional porous material.

6. The in-line flow type hydrogen peroxide electrochemical generation apparatus according to claim 2, wherein the cathode electrode (12) and the anode electrode (14) are in the form of a porous plate or a plate made of a three-dimensional porous metal material.

7. The in-line flow type hydrogen peroxide electrochemical generation apparatus according to claim 6, wherein the cathode electrode (12) and the anode electrode (14) are made of an alloy of one or more of platinum, iridium, ruthenium, rhodium and osmium.

8. The in-line flow type hydrogen peroxide electrochemical generation apparatus according to claim 1, wherein there are two or more hydrogen peroxide electrochemical generators (2), and the two or more hydrogen peroxide electrochemical generators (2) are connected in series or in parallel.

9. The tandem flow type electrochemical generation apparatus for hydrogen peroxide according to claim 1, further comprising a water supply tank (3), a water pump (4) and a water storage tank (5), wherein the water supply tank (3) is connected to the water inlet (112) of the water pump (4), the water outlet (113) of the water pump (4) is connected to the water inlet (112) of the electrochemical generator for oxygen (1), the water outlet (113) of the electrochemical generator for oxygen (1) is connected to the water inlet (112) of the electrochemical generator for hydrogen peroxide (2), and the water outlet (113) of the electrochemical generator for hydrogen peroxide (2) is connected to the water storage tank (5).

10. The in-line flow type hydrogen peroxide electrochemical generator according to claim 9, wherein the water storage tank (5) is communicated with the water supply tank (3) so that the electrolyte can be circulated in the in-line flow type hydrogen peroxide electrochemical generator.

Technical Field

The invention relates to the field of electrochemical equipment, in particular to a series flow type hydrogen peroxide electrochemical generation device.

Background

The hydrogen peroxide has stronger oxidability, the reduction product of the hydrogen peroxide is water, and the hydrogen peroxide is used as an oxidant without introducing impurities and polluting the environment, so the hydrogen peroxide is an environment-friendly oxidant, has wide application range, and has application in the fields of chemical synthesis, paper pulp and papermaking, textile bleaching, cleaning and etching, environmental protection and the like. The existing industrial production of hydrogen peroxide requires complex preparation process, large-scale and energy-intensive production equipment, and hydrogen peroxide solution is unstable and is easily degraded by light during transportation and storage, and decomposed oxygen can increase equipment cost for transportation and storage facilities and cause potential safety hazards. In order to promote the application of hydrogen peroxide, a small-sized, distributed, energy-saving and efficient device which is convenient to produce and use immediately needs to be developed to produce the hydrogen peroxide.

Disclosure of Invention

In order to solve the problems of complex process and high energy consumption of the hydrogen peroxide production device in the prior art, the invention provides the series flow type hydrogen peroxide electrochemical generation device which is provided with the oxygen electrochemical generator and the hydrogen peroxide electrochemical generator, and the concentration of dissolved oxygen in electrolyte is improved by utilizing the reaction of electrolyzed water, so that the reaction balance in the hydrogen peroxide electrochemical generation device moves towards the direction of generating hydrogen peroxide, and the concentration of hydrogen peroxide solution produced by the hydrogen peroxide electrochemical generation device is improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: a series flow type hydrogen peroxide electrochemical generation device is provided with an oxygen electrochemical generator and a hydrogen peroxide electrochemical generator, wherein the oxygen electrochemical generator is connected with the hydrogen peroxide electrochemical generator in series, so that electrolyte enters the hydrogen peroxide electrochemical generator after the electrolyte reacts with the oxygen electrochemical generator.

The technical scheme adopted by the invention for solving the technical problem further comprises the following steps:

the electrochemical production device of series flow type hydrogen peroxide is characterized in that the electrochemical generator of oxygen is provided with a shell, an electrolyte cavity is arranged in the shell, a water inlet and a water outlet are respectively arranged at two ends of the shell, a cathode electrode, an insulating separation device, an anode electrode and a spoiler are sequentially arranged in the electrolyte cavity from one side of the water inlet to one side of the water outlet, the insulating separation device separates the cathode electrode and the anode electrode, and the spoiler is used for increasing electrolyte eddy.

The series flow type hydrogen peroxide electrochemical generator as described above, the insulating separator is a porous flat plate-shaped separator made of an insulating material, and the insulating material is one of ceramic, plastic, glass, and glass fiber.

In the electrochemical generation device of series flow type hydrogen peroxide, the spoilers are flat, more than two spoilers are provided, and the spoilers are oppositely arranged and staggered with each other to form a bent flow channel for bending the circulating electrolyte.

In the above series flow type electrochemical hydrogen peroxide generating apparatus, the spoiler is a perforated plate or a plate made of a three-dimensional porous material.

In the above-mentioned tandem flow type electrochemical hydrogen peroxide generator, the cathode and the anode are porous plates or plates made of three-dimensional porous metal material.

In the above-mentioned tandem flow type electrochemical hydrogen peroxide generation apparatus, the cathode electrode and the anode electrode are made of an alloy of one or more of platinum, iridium, ruthenium, rhodium and osmium.

In the above series flow type electrochemical hydrogen peroxide generation apparatus, the number of the electrochemical hydrogen peroxide generators is two or more, and the two or more electrochemical hydrogen peroxide generators are connected in series or in parallel.

The series flow type hydrogen peroxide electrochemical generation device is further provided with a water supply tank, a water pump and a water storage tank, wherein the water supply tank is connected with a water inlet of the water pump, a water outlet of the water pump is connected with a water inlet of the oxygen electrochemical generator, a water outlet of the oxygen electrochemical generator is connected with a water inlet of the hydrogen peroxide electrochemical generator, and a water outlet of the hydrogen peroxide electrochemical generator is connected with the water storage tank.

The above-described tandem flow type hydrogen peroxide electrochemical generation apparatus, wherein the water storage tank is communicated with the water supply tank so that the electrolyte can be circulated in the tandem flow type hydrogen peroxide electrochemical generation apparatus.

The invention has the beneficial effects that: the series flow type hydrogen peroxide electrochemical generation device of the invention connects the oxygen electrochemical generator and the hydrogen peroxide electrochemical generator in series, improves the dissolved oxygen concentration in the electrolyte through the electrolytic water reaction, promotes the hydrogen peroxide electrochemical generator to generate hydrogen peroxide through electrolysis₂+0.5O₂→H₂O₂The reaction balance of the hydrogen peroxide generator moves towards the direction of generating hydrogen peroxide on the right side, so that the concentration of the hydrogen peroxide solution generated by the hydrogen peroxide electrochemical generator is improved, and the hydrogen peroxide generator is simple and efficient; whole device is littleer more energy-conserving, can disperse the setting, can satisfy more service environment, produces promptly and uses, has removed the trouble of transportation and storage from, can greatly expand the use of disinfection and pollutant purification of this environmental protection efficient disinfectant of hydrogen peroxide in family and public space.

The invention will be further described with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic diagram showing the connection relationship of a first embodiment of the series flow type electrochemical hydrogen peroxide generation apparatus according to the present invention;

FIG. 2 is a schematic cross-sectional view of an oxygen electrochemical generator in a series flow type hydrogen peroxide electrochemical generation apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a hydrogen peroxide electrochemical generator according to one embodiment of the present invention;

FIG. 4 is a schematic view showing the connection relationship between the second embodiment of the series flow type electrochemical hydrogen peroxide generator according to the present invention;

FIG. 5 is a schematic cross-sectional view of a hydrogen peroxide electrochemical generator according to a second embodiment of the series flow type hydrogen peroxide electrochemical generator of the present invention;

FIG. 6 is a schematic view showing the connection relationship of a third embodiment of the series flow type electrochemical hydrogen peroxide generator according to the present invention;

FIG. 7 is a graph showing the comparison between the concentration of hydrogen peroxide solution generated by other reaction devices in the embodiment of the series flow type electrochemical hydrogen peroxide generation apparatus according to the present invention;

in the figure, 1, an oxygen electrochemical generator, 11, a shell, 111, an electrolyte cavity, 112, a water inlet, 113, a water outlet, 12, a cathode electrode, 13, an insulating separation device, 14, an anode electrode, 15, a spoiler, 2, a hydrogen peroxide electrochemical generator, 21, a hydrogen oxide reaction cavity, 211, a liquid inlet, 212, a liquid outlet, 22, a hydrogen peroxide reaction cathode, 23, a hydrogen peroxide reaction anode, 24, a partition board, 241, a fixing part, 242, a spoiler part, 3, a water supply tank, 4, a water pump, 5, a water storage tank, 6 and a filter.

Detailed Description

The present embodiment is a preferred embodiment of the present invention, and other principles and basic structures that are the same as or similar to the present embodiment are within the scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Referring to fig. 1 to 3, the first embodiment of the series flow type hydrogen peroxide electrochemical generator of the present invention is provided with an oxygen electrochemical generator 1 and a hydrogen peroxide electrochemical generator 2, wherein the oxygen electrochemical generator 1 is connected in series with the hydrogen peroxide electrochemical generator 2, so that an electrolyte enters the hydrogen peroxide electrochemical generator 2 after passing through the oxygen electrochemical generator 1 for reaction.

The hydrogen peroxide electrochemical generator 2 of the series flow type hydrogen peroxide electrochemical generation device of the present invention generates hydrogen peroxide through a two-electron Oxygen Reduction Reaction (ORR), and reacts on a cathode electrode of the hydrogen peroxide electrochemical generator 2 as follows:

O₂+2(H⁺+e^-)→H₂O₂

at the anode electrode end of the hydrogen peroxide electrochemical generator 2, an electrolytic reaction of water occurs, which is as follows:

H₂O→0.5O₂+2(H⁺+e^-)

the overall reaction of the hydrogen peroxide generated in the hydrogen peroxide electrochemical generator 2 is:

H₂+0.5O₂→H₂O₂

therefore, the concentration of dissolved oxygen in the electrolyte is an important factor that affects the shift of the reaction equilibrium, and the greater the amount of dissolved oxygen in the electrolyte, the higher the concentration of the hydrogen peroxide solution generated by the hydrogen peroxide electrochemical generator 2. Generally, when the dissolved oxygen in the electrolyte is not saturated, oxygen in the atmosphere permeates into the water body, and the content of the dissolved oxygen is very small. The electrolyzed water reaction refers to the reaction of salt-containing water through electrolysis to generate hydrogen and oxygen, and the reaction on the cathode electrode of the oxygen electrochemical generator 1 is as follows:

2H₂O+2e^-→2OH^-+H₂

at the anode electrode end of the oxygen electrochemical generator 1, the following reactions occur:

H₂O→0.5O₂+2(H⁺+e^-)

the overall reaction in the oxygen electrochemical generator 1 is:

2H₂O→2H₂+O₂

because partial oxygen molecules generated by the anode are dissolved in the electrolyte, and the excessive oxygen is not precipitated in the form of bubbles until the dissolved oxygen concentration reaches saturation, the dissolved oxygen concentration in the electrolyte subjected to water electrolysis reaction is saturated, and is higher than that in the existing method of introducing air or oxygen into the electrolyte, so that the electrolyte saturated with dissolved oxygen can be obtained by using electrolyzed water and then used for electrolyzing to generate a hydrogen peroxide solution, and the reaction balance is pushed to move towards the direction of generating hydrogen peroxide on the right side.

In this embodiment, the oxygen electrochemical generator 1 is provided with a housing 11, an electrolyte chamber 111 is provided in the housing 11, a water inlet 112 and a water outlet 113 are respectively provided at two ends of the housing 11, a cathode electrode 12, an insulating separator 13, an anode electrode 14 and a spoiler 15 are sequentially provided in the electrolyte chamber 111 from one side of the water inlet 112 to one side of the water outlet 113, the insulating separator 13 separates the cathode electrode 12 and the anode electrode 14, and the spoiler 15 is used for increasing electrolyte eddy.

In this embodiment, in order to increase the eddy current effect of the electrolyte, the insulating separator 13 is a porous flat separator made of an insulating material, so that the electrolyte can flow while increasing the eddy current effect of the electrolyte, and the insulating material is ceramic. In a specific production implementation, the insulating separation device 13 may also be a fixing bracket for fixing the cathode electrode 12 and the anode electrode 14 on the housing 11, and the insulating material for manufacturing the insulating separation device 13 may also be selected from plastic, glass, and glass fiber as required.

In order to further increase the eddy effect of the electrolyte, the spoilers 15 are flat, more than two spoilers 15 are provided, and the spoilers 15 are oppositely arranged and staggered with each other to form a bent flow channel for bending the electrolyte flowing. In this embodiment, the spoilers 15 are arranged in parallel, one end of each of two adjacent spoilers 15 is fixed on the inner wall of the electrolyte chamber 111 on the two opposite sides, and a gap is left between the other end of each of the two adjacent spoilers 15 and the inner wall of the electrolyte chamber 111 on the other side, so that the three spoilers 15 are arranged in opposite directions and staggered with each other to form an S-shaped bent flow channel, and the electrolyte flows along the bent flow channel to generate a stronger vortex effect.

In order to increase the reactivity of the electrodes, the cathode electrode 12 and the anode electrode 14 are porous plates or plates made of three-dimensional porous metal materials, and the surface area of the electrodes is increased. The cathode electrode 12 and the anode electrode 14 are made of an alloy of one or more of platinum, iridium, ruthenium, rhodium, and osmium. In this embodiment, the cathode 12 and the anode 14 are plates made of three-dimensional porous platinum materials prepared by a powder metallurgy process.

Hydrogen peroxide electrochemical generator 2 in this embodiment includes hydrogen peroxide reaction cavity 21, hydrogen peroxide reaction negative pole 22 and hydrogen peroxide reaction positive pole 23, and in this embodiment, hydrogen peroxide reaction cavity 21 is the cuboid, and inside is hollow electrolyte chamber, is equipped with inlet and liquid outlet on hydrogen peroxide reaction cavity 21's the top surface and the bottom surface respectively, and inlet 211 sets up the left side at the bottom surface, and liquid outlet 212 sets up the right side at the top surface. The hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 are arranged inside the hydrogen peroxide reaction cavity 21, the external power supply 2 is electrically connected with the hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 through an electric wire passing through the hydrogen peroxide reaction cavity 21, and the hydrogen peroxide reaction cavity 21 is provided with an electric wire hole through which a power supply wire passes and a sealing edge for sealing the electric wire hole. In order to avoid short circuit, a separator 24 for separating electrodes and enhancing the eddy effect of the electrolyte is arranged between the hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23, and the separator 24 is an insulating separator and is made of an insulating material. The hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 are powered by an external power supply, the external power supply can be a lithium battery, a lead-acid battery, a nickel-metal hydride battery, a dry battery and the like, and can also be used after converting commercial power alternating current into direct current through a corresponding circuit, the voltage of the external power supply is optimally selected according to parameters such as the area of the electrode, the conductivity of electrolyte and the like, and the external power supply in the embodiment is commercial power alternating current converted into direct current by using the circuit.

In this embodiment, the hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 are disposed along the length direction of the hydrogen peroxide reaction chamber 21, the hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 are formed in a plate shape matching the shape of the inner wall of the hydrogen peroxide reaction chamber 21, and the hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 are fixed to the inner wall of the hydrogen peroxide reaction chamber 21 on both sides of the partition plate 24 in a facing manner. In a specific production implementation, the shape of the electrode can be set to be arc-shaped according to the shape of the inner wall of the hydrogen peroxide reaction chamber 21.

In order to increase the eddy effect of the electrolyte in the hydrogen peroxide reaction cavity 21, improve the reaction efficiency and increase the product concentration, the partition plate 24 of the embodiment includes two fixing portions 241 and two turbulent flow portions 242, the fixing portions 241 are disposed on two sides of the hydrogen peroxide reaction cavity 21 and fix the hydrogen peroxide reaction cathode 22 or the hydrogen peroxide reaction anode 23 on the inner wall of the hydrogen peroxide reaction cavity 21, and the inner wall of the hydrogen peroxide reaction cavity 21 is provided with a slot for fixing the hydrogen peroxide reaction cathode 22 or the hydrogen peroxide reaction anode 23 in a matching manner. In order to enable the electrolyte to contact with the electrodes, the fixing portion 241 is a grid plate in this embodiment, and in the actual production implementation, the fixing portion 241 may also be directly made into a frame body with a size matched with the shape of the inner wall of the hydrogen peroxide reaction chamber 21 or a support plate made of three-dimensional porous polymer fibers. The fixing portions 241 are respectively provided with a spoiler 242, in this embodiment, the spoiler 242 is plate-shaped, and the spoiler 242 on the two fixing portions 241 are oppositely disposed and staggered to form a bending channel for bending the electrolyte flowing through. The number of the flow-disturbing portions 242 is ten in the present embodiment, and the flow-disturbing portions 242 are increased or decreased according to the length of the hydrogen peroxide reaction chamber 21 while ensuring free flow of the electrolyte. When the electrolysis also enters the hydrogen peroxide reaction cavity 21 through the liquid inlet 211 at a high flow rate, a turbulent flow with a large intensity is generated under the action of the turbulent flow part 242, so as to promote the cathode reaction.

The flow type electrochemical device for preparing hydrogen peroxide generates hydrogen peroxide through two-electron oxygen reduction reaction, and the total reaction is as follows:

H₂+0.5O₂→H₂O₂

the reactions that occur specifically at the cathode are as follows:

O₂+2(H⁺+e^-)→H₂O₂

therefore, the cathode electrode material should be selected to have a three-dimensional structure to facilitate the adhesion of the cathode catalyst, and to increase the relative surface area of the cathode and the efficiency of hydrogen peroxide generation. In this embodiment, the hydrogen peroxide reaction cathode 22 is made of a porous graphite plate, and may be made of one of nickel foam, sintered titanium, activated carbon felt, or carbon paper. In order to inhibit the four-electron oxygen reduction reaction generated at the cathode end and improve the yield of hydrogen peroxide, the hydrogen peroxide reaction cathode 22 is coated with a cathode catalyst, the cathode catalyst in the embodiment is graphite oxide with high specific surface area, and the cathode catalyst can be Pt/C, PtHg according to the components of cathode materials and electrolyte in specific production implementation₄O-CNTs, graphite oxide, high surface area activated carbon powder, M-N-C (M ═ Co, Fe, Mn), and functionalized carbon powder.

Meanwhile, the electrolysis reaction of water occurs at the anode side of the electrochemical reaction device, which is specifically as follows:

H₂O→0.5O₂+2(H⁺+e^-)

therefore, the hydrogen peroxide reaction anode 23 should be made of a stable and non-oxidizable metal material, such as an alloy of one or more of platinum, palladium, ruthenium, rhodium, iridium, osmium and gold and one or more of iron, cobalt or nickel, or a non-metal material with a wide electrochemical potential window, good physical and chemical stability and low adsorption characteristics, such as a boron-doped diamond film and glassy carbon. In this embodiment, the hydrogen peroxide reaction anode 23 is a glassy carbon electrode. Meanwhile, in order to promote the water oxidation reaction, the surface of the hydrogen peroxide reaction anode 23 is coated or deposited with a water Oxidation (OER) catalyst, and the water Oxidation (OER) catalyst can be NiCoO_x、CoFeO_x、IrO_x/SrIrO₃、IrO₂、RuO₂、FeCoW、NiO_x、NiFeO_xOr solid Pt, in this example, a hydrogen peroxide reaction anodeThe water Oxidation (OER) catalyst coated on 23 is Pt in solid state.

The series flow type hydrogen peroxide electrochemical generation device of this embodiment is further provided with a water supply tank 3, a water pump 4 and a water storage tank 5, the water supply tank 3 is connected with the water inlet 112 of the water pump 4, the water outlet of the water pump 4 is connected with the water inlet of the oxygen electrochemical generator 1, the water outlet 113 of the oxygen electrochemical generator 1 is connected with the liquid inlet 211 of the hydrogen peroxide electrochemical generator 2, and the liquid outlet 212 of the hydrogen peroxide electrochemical generator 2 is connected with the water storage tank 5. If necessary, a pipeline for communicating the water storage tank 5 and the water supply tank 3 can be arranged between the water storage tank and the water supply tank, so that the reacted electrolyte circularly reacts in the series flow type hydrogen peroxide electrochemical generation device until the required concentration is reached.

Compared with the existing electrochemical equipment for generating hydrogen peroxide by an external air supply pump device, the series flow type hydrogen peroxide electrochemical generation device omits an air supply pump and a related pipeline device, can improve the integration degree and the reliability degree of the device, and reduces the assembly requirement and the cost of the device. Meanwhile, in the practical production implementation, the oxygen electrochemical generator 1 and the hydrogen peroxide electrochemical generator 2 flexibly select the combination of different shapes and sizes to meet different requirements on volume, flow and concentration of hydrogen peroxide solution in different scenes, and the adaptability of the equipment can be greatly improved.

Referring to fig. 4 and 5, the second embodiment of the series flow type electrochemical hydrogen peroxide generator of the present invention comprises an electrochemical oxygen generator 1, two electrochemical hydrogen peroxide generators 2, a water supply tank 3, a water pump 4 and a water storage tank 5. The water supply tank 3 is connected with the water inlet of the water pump 4, the water outlet of the water pump 4 is connected with the water inlet 112 of the oxygen electrochemical generator 1, the water outlet 113 of the oxygen electrochemical generator 1 is connected with the liquid inlet 211 of the first hydrogen peroxide electrochemical generator 2, the first hydrogen peroxide electrochemical generator 2 is connected with the second hydrogen peroxide electrochemical generator 2 in series, the liquid outlet 212 of the first hydrogen peroxide electrochemical generator 2 is connected with the liquid inlet 211 of the second hydrogen peroxide electrochemical generator 2, the liquid outlet 212 of the second hydrogen peroxide electrochemical generator 2 is connected with the water storage tank 5, a communicated pipeline is arranged between the water storage tank 5 and the water supply tank 3, so that the reacted electrolyte circularly reacts in the series flowing type hydrogen peroxide electrochemical generator until reaching the required concentration.

In this embodiment, the hydrogen peroxide electrochemical generator 2 includes a hydrogen peroxide reaction chamber 21, a hydrogen peroxide reaction cathode 22, and a hydrogen peroxide reaction anode 23. The hydrogen peroxide reaction chamber 21 of this embodiment is a hollow cylinder, and the inside thereof is an electrolyte chamber for electrochemical reaction, and the liquid inlet 211 and the liquid outlet 212 are respectively disposed on two bottom surfaces of the cylindrical hydrogen peroxide reaction chamber 21 and staggered with each other. The hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 are arranged inside the hydrogen peroxide reaction cavity 21 along the length direction of the hydrogen peroxide reaction cavity 21, the hydrogen peroxide reaction cathode 22 is in a cylindrical shape matched with the shape of the inner wall of the electrolyte cavity 11 and is fixedly arranged on the inner wall of the hydrogen peroxide reaction cavity 21, and a fixing structure capable of fixing the hydrogen peroxide reaction cathode 22 is arranged on the inner wall of the hydrogen peroxide reaction cavity 21; the hydrogen peroxide reaction anode 23 is strip-shaped and is arranged at the axis of the hydrogen peroxide reaction cathode 22, and the two bottom surfaces of the hydrogen peroxide reaction cavity 21 are provided with oppositely arranged fixed slots for fixing the hydrogen peroxide reaction anode 23. An external power supply for supplying power is electrically connected with the hydrogen peroxide reaction cathode 22 and the hydrogen peroxide reaction anode 23 through wires penetrating through the hydrogen peroxide reaction cavity 21, and the hydrogen peroxide reaction cavity 21 is provided with a wire hole through which a power supply wire penetrates and a sealing edge for sealing the wire hole. The separator 24 is a cylindrical three-dimensional porous polymer fiberboard, the size of the separator 24 is matched with that of the hydrogen peroxide reaction cathode 22, the separator 24 is inserted inside the hydrogen peroxide reaction cathode 22, and the hydrogen peroxide reaction anode 23 is inserted in the separator 24. Because the three-dimensional porous polymer fiber material has good compressibility and certain rigidity, the supporting force of the partition plate 24 on the hydrogen peroxide reaction cathode 22 can be flexibly adjusted by adjusting the compression amount of the material, so that the hydrogen peroxide reaction cathode 22 is prevented from being in contact with the hydrogen peroxide reaction anode 23 to cause short circuit. In addition, the porous structure of the three-dimensional porous polymeric fiber material can enable the electrolyte to generate a great amount of micro turbulence when the electrolyte passes through, enhance the ion exchange rate on the cathode and the anode, and improve the generation rate of hydrogen peroxideAnd the reaction rate is improved. In this embodiment, the hydrogen peroxide reaction cathode 22 is made of foamed nickel, and the cathode catalyst coated on the hydrogen peroxide reaction cathode 22 is Pt/C; the material of the hydrogen peroxide reaction anode 23 is iridium-iron alloy, and IrO is used as a water Oxidation (OER) catalyst deposited on the surface of the hydrogen peroxide reaction anode 23₂。

The two hydrogen peroxide electrochemical generators 2 of the present embodiment are arranged in series, so that the rate of generating the hydrogen peroxide solution can be increased, thereby increasing the concentration of the hydrogen peroxide solution generated at the same time.

Referring to fig. 6, the third embodiment of the series flow type electrochemical hydrogen peroxide generation apparatus according to the present invention is similar to the second embodiment, and the specific difference is that two electrochemical hydrogen peroxide generators 2 are connected in parallel. The electrolyte flows out from the water outlet 113 after reacting in the oxygen electrochemical generator 1, the shunt tube is divided into two paths, the two paths respectively flow to the two hydrogen peroxide electrochemical generators 2, and the two hydrogen peroxide electrochemical generators 2 react at the same time, so that the amount of the hydrogen peroxide solution generated in unit time is doubled, and the requirement of using the hydrogen peroxide solution in large quantity is met.

Considering the convenience of use, the electrolyte of the mobile electrochemical device for preparing hydrogen peroxide according to this embodiment may be a common water body such as treated tap water and mineral water, or a natural water body such as rainwater, river water and seawater, or untreated domestic wastewater and industrial wastewater. In order to avoid the oxygen electrochemical generator 1 from being blocked by impurities possibly contained in the electrolyte during use, the oxygen electrochemical generator 1 of the embodiment is provided with a filter 6 at the water inlet 112, and the filter 6 is a porous ceramic filter so as to sufficiently take out solid substances in the electrolyte. In the specific use, different types and filtering effects of filters such as a polymeric fiber filter, an activated carbon filter and the like can be selected according to the filtering requirements.

Finally, the beneficial effects of the present invention are demonstrated by the following experiments.

First, experimental design

The non-flow stainless steel electrode electrolytic cell was used as a comparative test, and experiments 1, 2 and 3 respectively employed the flow electrochemical device for producing hydrogen peroxide according to the first, second and third embodiments of the present invention, and circulated in the test device for one hour using tap water of the same water amount as an electrolyte, and the concentration of the hydrogen peroxide solution in the electrolytic cell and the reservoir 5 was measured every ten minutes.

The specific experimental conditions are shown in table one.

Watch 1

Second, analysis of experimental results

Watch two

	Comparative experiment	Experiment 1	Experiment 2	Experiment 3
					Reaction time (min)	Concentration (mg/L)	Concentration (mg/L)	Concentration (mg/L)	Concentration (mg/L)
0	0	0	0	0
					10	0.1	15	35	30
20	0.5	30	75	50
					30	1	50	110	100
40	2	65	150	120
					50	2	85	180	135
60	2	100	200	160

As shown in table two and fig. 7, in experiment 1, the flow-type electrochemical device for preparing hydrogen peroxide according to the first embodiment of the present invention effectively generates a hydrogen peroxide solution with an equilibrium concentration of about 100mg/L in an experimental time of one hour, which is much higher than the hydrogen peroxide solution concentration in the comparative experiment, which indicates that the presence of the oxygen electrochemical generator can effectively promote the reaction equilibrium to move, and increase the concentration of the hydrogen peroxide solution generated during the reaction equilibrium. In experiment 2, after the flow-type electrochemical device for preparing hydrogen peroxide of example two was used and one hydrogen peroxide electrochemical generator 2 connected in series was added, the hydrogen peroxide production rate and equilibrium concentration were increased by two times, indicating that the hydrogen peroxide solution concentration and production rate can be effectively increased by adding the hydrogen peroxide electrochemical generator. In experiment 3, the flow-type electrochemical device for preparing hydrogen peroxide according to example three is adopted, and after a hydrogen peroxide generator is additionally connected in parallel, the rate and equilibrium concentration of hydrogen peroxide generation are both improved compared with the single hydrogen peroxide reactor. The non-flow stainless steel electrode electrolytic cell used as a comparative experiment was capable of producing only a hydrogen peroxide solution having a concentration of about 2 mg/L. The above experimental results demonstrate that the present invention can provide a flow-type electrochemical device that can efficiently and rapidly generate a hydrogen peroxide solution of a desired concentration.

The series flow type hydrogen peroxide electrochemical generation device of the invention connects the oxygen electrochemical generator and the hydrogen peroxide electrochemical generator in series, improves the dissolved oxygen concentration in the electrolyte through the electrolytic water reaction, promotes the hydrogen peroxide electrochemical generator to generate hydrogen peroxide through electrolysis₂+0.5O₂→H₂O₂The reaction balance of the hydrogen peroxide generator moves towards the direction of generating hydrogen peroxide on the right side, so that the concentration of the hydrogen peroxide solution generated by the hydrogen peroxide electrochemical generator is improved, and the hydrogen peroxide generator is simple and efficient; the whole device is smaller and more energy-saving, can be arranged dispersedly, and can meet the requirementsMore use environments, namely production and use, avoid the troubles of transportation and storage, and can greatly expand the use of the hydrogen peroxide, which is an environment-friendly and efficient disinfectant, in household and public spaces for disinfection and purification of pollutants.