A flow-through plasma activated hydrogen peroxide system

Abstract

The utility model discloses a kind of overflow type plasma activated hydrogen peroxide systems, belong to electrochemical synthesis and green disinfection technical field, it includes electrolysis subsystem, plasma activation subsystem and high-pressure excitation and monitoring subsystem, electrolysis system is converted into high-purity hydrogen peroxide aqueous solution by the oxygen reduction reaction of reaction electric pile cathode side to pure water, anode side circulation electrolysis pure water;Plasma activation system adopts inclined sealing shell, inside is equipped with dielectric barrier discharge unit and liquid film formation unit, hydrogen peroxide solution forms uniform liquid film under the action of baffle, and active oxygen or active nitrogen group is generated with plasma reaction, high-pressure excitation and monitoring system real-time control discharge parameter.The utility model realizes the stable preparation and in-situ high-efficiency activation of high-purity hydrogen peroxide, with compact structure, low energy consumption, high sterilization efficiency and the like, suitable for medical, food processing and other fields of rapid disinfection.

Description

Technical Field

[0001] This invention belongs to the field of electrochemical synthesis and green disinfection technology, specifically, it relates to a flow-through plasma activated hydrogen peroxide system. Background Technology

[0002] Electrochemical disinfection technology utilizes electrons as an oxidation-reduction medium, making it a green disinfection method with significant environmental friendliness. It is effective against most microorganisms, including bacteria, viruses, and algae, and boasts advantages such as high environmental compatibility, low cost, and simple operation. Compared to traditional disinfection methods, electrochemical disinfection avoids the use of chemical agents and reduces the generation of disinfection byproducts. It is gradually becoming an ideal alternative to traditional methods such as chemical dosing and physical disinfection, showing broad application prospects in drinking water treatment, medical disinfection, wastewater treatment, and green home appliances.

[0003] Electrochemical disinfection primarily utilizes the electrode reactions generated by flowing water under an electric field to produce strong oxidizing substances (such as free chlorine, ozone, and hydrogen peroxide) that inhibit or disrupt the metabolic functions of microorganisms, thus achieving disinfection. Hypochlorous acid, a small-molecule, electrically neutral substance in free chlorine, possesses strong penetrating power and exhibits strong and sustained disinfection capabilities; even low doses generally meet disinfection requirements. However, during disinfection, free chlorine readily undergoes electrophilic substitution reactions with organic matter, producing toxic byproducts. Ozone, as an alternative to chlorine disinfection, offers advantages such as rapid and efficient disinfection, no residue after action, and broad-spectrum sterilization. However, ozone molecules are unstable, posing a risk of spillage and readily oxidizing and corroding equipment. Furthermore, raw water containing bromide ions, after ozone oxidation, produces carcinogenic bromate. Hydrogen peroxide is a safer and more environmentally friendly oxidant, decomposing into water and oxygen, possessing sustained sterilization capabilities and leaving no harmful residues. However, the sterilization effect of hydrogen peroxide alone is limited by its chemical stability and oxidation reaction rate; therefore, hydrogen peroxide usually needs to be coupled with other technologies to achieve better disinfection results. Plasma activation technology can generate active groups by reacting high-energy particles with hydrogen peroxide. However, existing methods mainly use the method of adding external chemical agents to combine hydrogen peroxide with plasma activation technology. This process is not only a discontinuous process, but the concentration of hydrogen peroxide in the reaction also decreases continuously. In addition, traditional hydrogen peroxide preparation methods have problems such as low concentration and insufficient purity. Utility Model Content

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A flow-through plasma activated hydrogen peroxide system, comprising:

[0006] An electrolysis subsystem converts pure water into a high-purity hydrogen peroxide aqueous solution through an oxygen reduction reaction on the cathode side of the reactor stack, and circulates pure water for electrolysis on the anode side.

[0007] The plasma activation subsystem adopts an inclined sealed shell and is equipped with a dielectric barrier discharge unit and a liquid film forming unit inside. The hydrogen peroxide solution forms a uniform liquid film with a thickness of 0.1 to 1.5 mm under the action of the baffle plate, which reacts with the plasma to generate highly efficient active oxygen or active nitrogen groups.

[0008] A high-voltage excitation and monitoring subsystem is used to adjust discharge parameters in real time.

[0009] Furthermore, the electrolysis subsystem includes a reactor, a DC power supply, an anolyte circulation unit, a catholyte flow unit, and an oxygen supply unit;

[0010] The cathode liquid flow unit and the oxygen supply unit are connected to the cathode of the reactor stack, and the anolyte circulation unit is connected to the anode of the reactor stack. The cathode side of the reactor stack converts pure water into hydrogen peroxide aqueous solution through oxygen reduction reaction, and the anode side circulates and electrolyzes pure water.

[0011] Furthermore, the anolyte circulation unit in the electrolysis subsystem includes an anolyte tank, an anode pump, and an anode flow meter connected in sequence. The outlet of the anode flow meter is connected to the anode inlet of the reactor. The anolyte circulation unit transports pure water from the anolyte tank to the anode inlet of the reactor, and after electrolysis, it flows out from the anode outlet to form an anode circulation electrolysis path.

[0012] The catholy liquid flow unit includes a catholy liquid tank, a cathode pump, and a cathode flow meter connected in sequence. The outlet of the cathode flow meter is connected to the cathode inlet of the reactor. The oxygen supply unit includes an oxygen generator and a mass flow controller connected in sequence. The outlet of the mass flow controller is connected to the cathode inlet of the reactor. The oxygen supply unit and the catholy liquid flow unit synchronously deliver oxygen and pure water from the catholy liquid tank to the cathode inlet of the reactor. After electrolysis, the oxygen flows out from the cathode outlet and enters the plasma activation subsystem to form a cathode flow electrolysis path.

[0013] Furthermore, the plasma activation subsystem includes a sealed housing and support and heat dissipation unit, a dielectric barrier discharge unit, a liquid film formation unit, and a gas supply unit;

[0014] The support and heat dissipation unit includes a discharge device base, a bracket, a cooling fan, a heat sink, and a stainless steel plate. The sealed housing is installed obliquely on the discharge device base via the bracket. The stainless steel plate is disposed between the bracket and the sealed housing, and both ends are connected to the bracket. The heat sink is connected to the bottom of the stainless steel plate, and the cooling fan is installed at the bottom of the heat sink.

[0015] The dielectric barrier discharge unit includes a Peltier element, a first barrier medium, a second barrier medium, a high-voltage electrode, and a corona discharge region. The first barrier medium and the second barrier medium are fixed inside the sealed housing by a first isolator and a second isolator, respectively. The high-voltage electrode is installed on the sealed housing and connected to the second barrier medium. The first barrier medium is an Al2O3 ceramic plate, the second barrier medium is a quartz glass plate covered with a nano-TiO2 coating, and the high-voltage electrode is a titanium electrode, an aluminum electrode, or a stainless steel electrode.

[0016] The corona discharge region is located between the first barrier medium and the second barrier medium;

[0017] The cold end of the Peltier element is attached to the bottom of the first barrier medium, and the hot end is connected by a stainless steel plate.

[0018] The liquid film forming unit includes an inlet tank, baffles, an upper inlet, and a lower outlet. The inlet tank is located between a first blocking medium and a second blocking medium and is inclined and fixed on the first blocking medium. The baffles are arranged alternately at the bottom of the inlet tank and form an angle of 15° to 45° with the side wall of the inlet tank. The upper inlet and the lower outlet are respectively located at both ends of the inlet tank.

[0019] The gas supply unit includes an inlet pipe and an outlet pipe disposed inside the sealed housing. One end of the inlet pipe is located outside the sealed housing, and the other end extends into the corona discharge region. One end of the outlet pipe is located within the corona discharge region, and the other end extends into the outside of the sealed housing.

[0020] Furthermore, the intake pipe is used to introduce one or more of air, oxygen, nitrogen, argon, and helium. After the gas is introduced into the corona discharge region through the intake pipe, plasma is formed, and the remaining gas is discharged through the exhaust pipe.

[0021] Furthermore, the high-voltage excitation and monitoring subsystem includes a high-voltage AC power supply, an oscilloscope, a high-voltage probe, a resistor, and a current probe. The high-voltage AC power supply is connected to the high-voltage electrode, and the Peltier element is connected to the high-voltage AC power supply as a ground electrode. The resistor is placed between the Peltier element and the high-voltage AC power supply. The high-voltage probe, the current probe, and the oscilloscope constitute a discharge monitoring circuit.

[0022] Furthermore, the cathode overcurrent electrolysis path is connected to the upper liquid inlet of the liquid film forming unit in the plasma activation subsystem. The hydrogen peroxide aqueous solution generated on the cathode side of the reactor enters the liquid inlet tank through the upper liquid inlet and forms a uniform liquid film with a thickness of 0.1 to 1.5 mm through the baffle plate. The liquid film reacts with the plasma in the corona discharge region to form an activated hydrogen peroxide solution, which flows through the lower liquid outlet and is output to the activation liquid tank.

[0023] Furthermore, the activated hydrogen peroxide solution in the activation tank contains active oxygen or active nitrogen groups.

[0024] The beneficial effects of this utility model are:

[0025] This invention achieves stable preparation and in-situ efficient activation of high-purity hydrogen peroxide, and has the advantages of compact structure, low energy consumption, and high sterilization efficiency. It is suitable for rapid disinfection in medical, food processing and other fields.

[0026] This invention utilizes pure water and oxygen to generate high-purity hydrogen peroxide solution in situ via a two-electron oxygen reduction reaction. Through integrated design, the stable preparation of high-purity hydrogen peroxide and in-situ efficient activation are coupled into an integrated device, simplifying the process flow and solving the problems of discontinuity and concentration decay in the hydrogen peroxide activation process.

[0027] This invention optimizes the types of high-energy particles by combining multiple plasma gas sources, forms a uniform liquid film through baffles, increases the contact area between plasma and high-purity hydrogen peroxide solution, improves the efficiency of active material generation, and achieves efficient enhancement of hydrogen peroxide solution; and uses a heat dissipation unit to effectively control the corona discharge area, avoids ineffective decomposition during the activation process of hydrogen peroxide solution, and ensures long-term stable operation of the system. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a flow-through plasma activated hydrogen peroxide system according to the present invention.

[0029] In the diagram: 1. Reactor stack; 2. DC power supply; 3. Anode liquid tank; 4. Anode pump; 5. Anode flow meter; 6. Cathode liquid tank; 7. Cathode pump; 8. Cathode flow meter; 9. Oxygen generator; 10. Mass flow controller; 11. Activation liquid tank; 12. Discharge device base; 13. Support; 14. Cooling fan; 15. Heat sink; 16. Stainless steel plate; 17. Peltier element; 18. First barrier medium; 19. Upper inlet; 20. Inlet tank; 21. Second barrier medium; 22. Sealed housing; 23. Inlet pipe; 24. Outlet pipe; 25. High-voltage electrode; 26. First isolator; 27. Second isolator; 28. Corona discharge zone; 29. ​​Baffle plate; 30. Lower outlet; 31. High-voltage AC power supply; 32. Oscilloscope; 33. High-voltage probe; 34. Resistor; 35. Current probe. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] refer to Figure 1 A flow-through plasma activated hydrogen peroxide system, comprising:

[0033] The electrolysis subsystem converts pure water into a high-purity hydrogen peroxide solution through the oxygen reduction reaction on the cathode side of the reactor stack, while circulating pure water on the anode side.

[0034] The plasma activation subsystem adopts an inclined sealed shell and is equipped with a dielectric barrier discharge unit and a liquid film forming unit. The hydrogen peroxide solution forms a uniform liquid film under the action of the baffle plate, which reacts with the plasma to generate highly efficient active oxygen or active nitrogen groups.

[0035] The high-voltage excitation and monitoring subsystem is used to adjust discharge parameters in real time.

[0036] This invention utilizes pure water and oxygen to generate high-purity hydrogen peroxide solution in situ via a two-electron oxygen reduction reaction. Through integrated design, the stable preparation of high-purity hydrogen peroxide and in-situ efficient activation are coupled into an integrated device, simplifying the process flow and solving the problems of discontinuity and concentration decay in the hydrogen peroxide activation process.

[0037] This invention optimizes the types of high-energy particles by combining multiple plasma gas sources, forms a uniform liquid film through baffles, increases the contact area between plasma and high-purity hydrogen peroxide solution, improves the efficiency of active material generation, and achieves efficient enhancement of hydrogen peroxide solution; and uses a heat dissipation unit to effectively control the corona discharge area, avoids ineffective decomposition during the activation process of hydrogen peroxide solution, and ensures long-term stable operation of the system.

[0038] In this embodiment, the catholyte flow unit and the oxygen supply unit are connected to the cathode of the reactor stack. The cathode side of the reactor stack converts pure water into a hydrogen peroxide aqueous solution through an oxygen reduction reaction. The anolyte circulation unit is connected to the anode of the reactor stack, and the anode side of the reactor stack circulates and electrolyzes pure water.

[0039] The electrolysis subsystem includes a reactor 1, a DC power supply 2, an anolyte circulation unit, a catholyte flow unit, and an oxygen supply unit. The catholyte flow unit and the oxygen supply unit are connected to the cathode of the reactor 1, and the anolyte circulation unit is connected to the anode of the reactor 1. The cathode side of the reactor 1 converts pure water into a hydrogen peroxide aqueous solution through an oxygen reduction reaction, and the anode side circulates and electrolyzes pure water.

[0040] In this embodiment, the anolyte circulation unit in the electrolysis subsystem includes an anolyte tank 3, an anode pump 4, and an anode flow meter 5 connected in sequence. The outlet of the anode flow meter 5 is connected to the anode inlet of the reactor 1. The anolyte circulation unit transports pure water from the anolyte tank 3 to the anode inlet of the reactor 1. After electrolysis, the water flows out from the anode outlet to form an anode circulation electrolysis path.

[0041] The catholy liquid flow unit includes a catholy liquid tank 6, a cathode pump 7, and a cathode flow meter 8 connected in sequence. The outlet of the cathode flow meter 8 is connected to the cathode inlet of the reactor 1. The oxygen supply unit includes an oxygen generator 9 and a mass flow controller 10 connected in sequence. The outlet of the mass flow controller 10 is connected to the cathode inlet of the reactor 1. The oxygen supply unit and the catholy liquid flow unit synchronously deliver oxygen and pure water from the catholy liquid tank 6 to the cathode inlet of the reactor 1. After electrolysis, the oxygen flows out from the cathode outlet and enters the plasma activation subsystem to form a cathode flow electrolysis path.

[0042] In this embodiment, the plasma activation subsystem includes a sealed housing 22, a support and heat dissipation unit, a dielectric barrier discharge unit, a liquid film formation unit, and a gas supply unit.

[0043] The support and heat dissipation unit includes a discharge device base 12, a bracket 13, a cooling fan 14, a heat sink 15, and a stainless steel plate 16. The sealed housing 22 is mounted on the discharge device base 12 at an angle of 5° to 50° via the bracket 13. The stainless steel plate 16 is disposed between the bracket 13 and the sealed housing 22, and both ends are connected to the bracket 13. The heat sink is connected to the bottom of the stainless steel plate 16, and the cooling fan 14 is mounted on the bottom of the heat sink 15.

[0044] In practice, the height of bracket 13 is set according to actual use, or it can be set as an electric telescopic pole structure.

[0045] The dielectric barrier discharge unit includes a Peltier element 17, a first barrier medium 18, a second barrier medium 21, a high-voltage electrode 25, and a corona discharge region 28. The first barrier medium 18 and the second barrier medium 21 are fixed inside the sealed housing 22 by the first isolator 26 and the second isolator 27, respectively. The high-voltage electrode 25 is installed on the sealed housing 22 and connected to the second barrier medium 21.

[0046] The corona discharge region 28 is located between the first barrier medium 18 and the second barrier medium 21, and the spacing is adjustable from 0.5 to 3 mm.

[0047] Preferably, the first barrier medium 18 is an Al2O3 ceramic plate, the second barrier medium 21 is a quartz glass plate covered with a nano-TiO2 coating, and the high-voltage electrode 25 is a titanium electrode, an aluminum electrode, or a stainless steel electrode.

[0048] The cold end of the Peltier element 17 is attached to the bottom of the first barrier medium 18, and the hot end is connected to the heat sink 15 and the cooling fan 14 through the stainless steel plate 16, so that the temperature of the corona discharge region 28 is controlled at 20-40℃.

[0049] The liquid film forming unit includes an inlet tank 20, baffles 29, an upper inlet 19, and a lower outlet 30. The inlet tank 20 is located between the first blocking medium 18 and the second blocking medium 21 and is fixed at an inclination on the first blocking medium 18. The baffles 29 are arranged alternately at the bottom of the inlet tank 20 and form an angle of 15° to 45° with the side wall of the inlet tank 20. The upper inlet 19 and the lower outlet 30 are respectively located at both ends of the inlet tank 20.

[0050] The gas supply unit includes an inlet pipe 23 and an outlet pipe 24 disposed inside the sealed housing 22. One end of the inlet pipe 23 is located outside the sealed housing 22, and the other end extends into the corona discharge region 28. One end of the outlet pipe 24 is located inside the corona discharge region 28, and the other end extends into the outside of the sealed housing 22.

[0051] In this embodiment, the intake pipe 23 selectively introduces one or more of air, oxygen, nitrogen, argon, and helium. After the gas is introduced into the corona discharge region 28 through the intake pipe 23, plasma is formed, and the remaining gas is discharged through the exhaust pipe 24.

[0052] In this embodiment, the high-voltage excitation and monitoring subsystem includes a high-voltage AC power supply 31, an oscilloscope 32, a high-voltage probe 33, a resistor 34, and a current probe 35. The high-voltage AC power supply 31 is connected to the high-voltage electrode 25, and the Peltier element 17 is connected to the high-voltage AC power supply 31 as a ground electrode. The resistor 34 is disposed between the Peltier element 17 and the high-voltage AC power supply 31. The high-voltage probe 33, the current probe 35, and the oscilloscope 32 constitute a discharge monitoring circuit.

[0053] In this embodiment, the cathode overcurrent electrolysis path in the electrolysis subsystem is connected to the upper inlet 19 of the liquid film forming unit in the plasma activation subsystem. The hydrogen peroxide aqueous solution generated on the cathode side of the reactor 1 enters the liquid inlet tank 20 through the upper inlet 19 and flows from top to bottom. Through the turbulence effect of the baffle, a uniform liquid film with a thickness of 0.1 to 1.5 mm is formed. The liquid film reacts with the plasma in the corona discharge zone 28 to form an activated hydrogen peroxide solution, which flows through the lower outlet 30 and is output to the activation liquid tank 11.

[0054] In this embodiment, the activated hydrogen peroxide solution in the activation tank 11 contains active oxygen or active nitrogen groups, which can be used for efficient disinfection.

[0055] How to use:

[0056] This invention prepares a high-purity hydrogen peroxide aqueous solution in situ via an electrolysis subsystem, and then generates a highly active solution via a plasma activation subsystem. The specific implementation process is as follows:

[0057] Pure water (conductivity ≤10μS / cm) in anolyte tank 3 is pumped to the anode side of reactor 1 via anode pump 4, where an oxygen evolution reaction occurs.

[0058] Anode reaction: 2H₂O → 4H + +O2↑+4e -

[0059] The oxygen (purity ≥ 93%) supplied by the oxygen generator 9 is regulated by the mass flow controller 10 and then fed into the cathode side of the reactor 1. The pure water in the cathode liquid tank 6 is metered by the cathode pump 7 and the cathode flow meter 8 and then enters the cathode side of the reactor 1 synchronously with the oxygen to undergo a two-electron oxygen reduction reaction.

[0060] Cathode reaction: O2 + 2H + +2e - →H2O2

[0061] The 0.1-3 wt% hydrogen peroxide aqueous solution generated on the cathode side of reactor 1 is transported through a pipeline from the outlet of reactor 1 to the upper inlet 19 of the plasma activation subsystem.

[0062] Hydrogen peroxide solution enters the inclined inlet tank 20 and forms a uniform liquid film with a thickness of 0.3 to 0.8 mm under the action of the baffle plate 29, which flows downward along the bottom of the inclined inlet tank.

[0063] Oxygen is introduced into the intake pipe 23 and ionized by a high-voltage electric field (10-50kHz, 20-40kV) in the corona discharge region 28 to form plasma, which reacts with the liquid film.

[0064] The activated solution contains hydroxyl radicals (·OH) and singlet oxygen (O). 1 Highly active substances such as D) are collected into the activation liquid tank 11 through the lower outlet 30.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. A flow-through plasma-activated hydrogen peroxide system, characterized in that, include: An electrolysis subsystem converts pure water into a high-purity hydrogen peroxide aqueous solution through an oxygen reduction reaction on the cathode side of the reactor stack, and circulates pure water for electrolysis on the anode side. The plasma activation subsystem adopts an inclined sealed shell and is equipped with a dielectric barrier discharge unit and a liquid film forming unit. The hydrogen peroxide solution forms a uniform liquid film under the action of the baffle plate, which reacts with the plasma to generate highly efficient active oxygen or active nitrogen groups. A high-voltage excitation and monitoring subsystem is used to adjust discharge parameters in real time.

2. The flow-through plasma activated hydrogen peroxide system according to claim 1, characterized in that, The electrolysis subsystem includes a reactor (1), a DC power supply (2), an anolyte circulation unit, a cathode liquid flow unit, and an oxygen supply unit; The cathode liquid flow unit and the oxygen supply unit are connected to the cathode of the reactor (1), and the anolyte circulation unit is connected to the anode of the reactor (1). The cathode side of the reactor (1) converts pure water into hydrogen peroxide aqueous solution through oxygen reduction reaction, and the anode side circulates and electrolyzes pure water.

3. The flow-through plasma activated hydrogen peroxide system according to claim 2, characterized in that, The anolyte circulation unit in the electrolysis subsystem includes an anolyte tank (3), an anode pump (4), and an anode flow meter (5) connected in sequence. The outlet of the anode flow meter (5) is connected to the anode inlet of the reactor (1). The anolyte circulation unit transports pure water from the anolyte tank (3) to the anode inlet of the reactor (1), and after electrolysis, it flows out from the anode outlet to form an anode circulation electrolysis path. The cathode liquid flow unit includes a cathode liquid tank (6), a cathode pump (7), and a cathode flow meter (8) connected in sequence. The outlet of the cathode flow meter (8) is connected to the cathode inlet of the reactor (1). The oxygen supply unit includes an oxygen generator (9) and a mass flow controller (10) connected in sequence. The outlet of the mass flow controller (10) is connected to the cathode inlet of the reactor (1). The oxygen supply unit and the cathode liquid flow unit synchronously transport oxygen and pure water in the cathode liquid tank (6) to the cathode inlet of the reactor (1). After electrolysis, the oxygen flows out from the cathode outlet and enters the plasma activation subsystem to form a cathode flow electrolysis path.

4. The flow-through plasma activated hydrogen peroxide system according to claim 3, characterized in that, The plasma activation subsystem includes a sealed housing (22) and a support and heat dissipation unit, a dielectric barrier discharge unit, a liquid film forming unit and a gas supply unit; The support and heat dissipation unit includes a discharge device base (12), a bracket (13), a heat dissipation fan (14), a heat sink (15), and a stainless steel plate (16). The sealed housing (22) is installed obliquely on the discharge device base (12) via the bracket (13). The stainless steel plate (16) is disposed between the bracket (13) and the sealed housing (22), and both ends are connected to the bracket (13). The heat sink is connected to the bottom of the stainless steel plate (16), and the heat dissipation fan (14) is installed at the bottom of the heat sink (15). The dielectric barrier discharge unit includes a Peltier element (17), a first barrier medium (18), a second barrier medium (21), a high-voltage electrode (25), and a corona discharge region (28). The first barrier medium (18) and the second barrier medium (21) are fixed inside the sealed housing (22) through a first isolator (26) and a second isolator (27), respectively. The high-voltage electrode (25) is installed on the sealed housing (22) and connected to the second barrier medium (21). The first barrier medium (18) is an Al2O3 ceramic plate, the second barrier medium (21) is a quartz glass plate covered with a nano TiO2 coating, and the high-voltage electrode (25) is a titanium electrode, an aluminum electrode, or a stainless steel electrode. The corona discharge region (28) is located between the first barrier medium (18) and the second barrier medium (21); The cold end of the Peltier element (17) is attached to the bottom of the first barrier medium (18), and the hot end is connected by a stainless steel plate (16). The liquid film forming unit includes an inlet tank (20), baffles (29), an upper inlet (19), and a lower outlet (30). The inlet tank (20) is located between the first barrier medium (18) and the second barrier medium (21) and is fixed at an inclination on the first barrier medium (18). The baffles (29) are arranged alternately at the bottom of the inlet tank (20) and form an angle of 15° to 45° with the side wall of the inlet tank (20). The upper inlet (19) and the lower outlet (30) are respectively located at both ends of the inlet tank (20). The gas supply unit includes an inlet pipe (23) and an outlet pipe (24) disposed inside the sealed housing (22). One end of the inlet pipe (23) is located outside the sealed housing (22), and the other end extends into the corona discharge region (28). One end of the outlet pipe (24) is located in the corona discharge region (28), and the other end extends into the outside of the sealed housing (22).

5. The flow-through plasma activated hydrogen peroxide system according to claim 4, characterized in that, The inlet pipe (23) is used to introduce one or more of air, oxygen, nitrogen, argon and helium. After the gas is introduced into the corona discharge region (28) through the inlet pipe (23), plasma is formed. The remaining gas is discharged through the outlet pipe (24).

6. The flow-through plasma activated hydrogen peroxide system according to claim 4, characterized in that, The high-voltage excitation and monitoring subsystem includes a high-voltage AC power supply (31), an oscilloscope (32), a high-voltage probe (33), a resistor (34), and a current probe (35). The high-voltage AC power supply (31) is connected to the high-voltage electrode (25). The Peltier element (17) is connected to the high-voltage AC power supply (31) as a ground electrode. The resistor (34) is placed between the Peltier element (17) and the high-voltage AC power supply (31). The high-voltage probe (33), the current probe (35), and the oscilloscope (32) constitute a discharge monitoring circuit.

7. The flow-through plasma-activated hydrogen peroxide system according to claim 4, characterized in that, The cathode overcurrent electrolysis path is connected to the upper liquid inlet (19) of the liquid film forming unit in the plasma activation subsystem. The hydrogen peroxide aqueous solution generated on the cathode side of the reactor (1) enters the liquid inlet tank (20) through the upper liquid inlet (19) and forms a uniform liquid film with a thickness of 0.1 to 1.5 mm through the baffle plate. The liquid film reacts with the plasma in the corona discharge zone (28) to form an activated hydrogen peroxide solution, which flows through the lower liquid outlet (30) and is output to the activation liquid tank (11).

8. The flow-through plasma activated hydrogen peroxide system according to claim 7, characterized in that, The activated hydrogen peroxide solution in the activation tank (11) contains active oxygen or active nitrogen groups.

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