A microdroplet plasma-based efficient hydrogen peroxide production apparatus and method

Abstract

The application relates to the technical field of hydrogen peroxide preparation, and discloses a high-efficiency hydrogen peroxide preparation device and method based on micro-droplet plasma, which comprises a low-temperature chamber, the inside of the low-temperature chamber is fixedly connected with a constant-temperature tank, the inside of the constant-temperature tank is provided with a reactor, one end of two connecting rods is provided with an ultrasonic atomizer, the top of a workbench is respectively provided with an alternating-current power supply, a direct-current power supply, a gas chromatograph and a display, the top of the alternating-current power supply is provided with an oscilloscope, the middle of the reactor is provided with a ground electrode, the top of the reactor is assembled with a sleeve joint, and a high-voltage electrode is installed in the sleeve joint in a penetrating mode. The device realizes the combination of the reaction environment unique to the micro-droplet interface and the plasma technology, promotes the high-efficiency action among electrons, active oxygen species and water molecules, and thus realizes the low-energy-consumption, chemical-additive-free green preparation of hydrogen peroxide.

Description

Technical Field

[0001] This invention relates to the field of hydrogen peroxide preparation technology, specifically to a high-efficiency hydrogen peroxide preparation device and method based on microdroplet plasma. Background Technology

[0002] Hydrogen peroxide is an important basic chemical raw material with wide applications in disinfection, bleaching, environmental remediation, electronics industry, and energy systems.

[0003] Existing methods for preparing hydrogen peroxide typically involve the anthraquinone process, which uses 2-ethylanthraquinone as a carrier to prepare a working solution. This solution undergoes a hydrogenation reaction with hydrogen in the presence of a palladium catalyst to generate hydrogen anthraquinone. The hydrogen peroxide is then oxidized back to anthraquinone by air and converted back to hydrogen peroxide. Finally, the hydrogen peroxide is obtained through water extraction, purification, and concentration.

[0004] The inventors of this application discovered in their research that the core defect of the aforementioned prior art is that: most existing hydrogen peroxide preparation equipment adopts a uniform aqueous phase discharge method, resulting in a dispersed reaction area, a low spatial concentration of active species, and the inability to effectively concentrate energy in the reaction area, leading to low energy efficiency of the plasma solution system. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a highly efficient hydrogen peroxide preparation device and method based on microdroplet plasma, solving the problem that existing hydrogen peroxide preparation devices mostly adopt a uniform aqueous phase discharge method, which results in energy not being effectively concentrated in the reaction region, leading to low energy efficiency of the plasma solution system.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency hydrogen peroxide preparation device based on microdroplet plasma, comprising a worktable, a low-temperature chamber fixedly connected to the top of the worktable, a constant-temperature bath fixedly connected inside the low-temperature chamber, a reactor disposed inside the constant-temperature bath, connecting rods symmetrically fixedly connected to the bottom inner wall of the constant-temperature bath, an ultrasonic nebulizer mounted at one end of each connecting rod, an AC power supply, a DC power supply, a gas chromatograph, and a display respectively mounted on the top of the worktable, an oscilloscope mounted on the top of the AC power supply, a ground electrode disposed in the middle of the reactor, a compression fitting fitted on the top of the reactor, a high-voltage electrode being installed through the compression fitting, the bottom of the high-voltage electrode being positioned at the center of the ground electrode, a clamping assembly and a disturbance assembly disposed inside the low-temperature chamber, and a striking assembly disposed on one side of the low-temperature chamber.

[0007] By adopting the above technical solution, deionized water is first injected into the reactor to place the tip of the high-voltage electrode at the center of the ground electrode. Then, gas is introduced to purge the air, the low-temperature temperature control system is activated, and the DC power supply drives the ultrasonic atomization unit. Through high-frequency resonance, the water in the reactor is dispersed into microdroplets. At the same time, the carrier gas forms an upward airflow, carrying the microdroplets into the discharge area. The AC high-voltage power supply is then connected, forming a non-thermal plasma between the electrodes. The electric field at the microdroplet interface and the plasma field work together to generate various active species. Hydrogen peroxide is generated on the surface of the microdroplets through free radical coupling and redox reactions. During equipment operation, the oscilloscope collects the waveforms of electrical parameters in real time, and the gas chromatograph analyzes the gas phase components online and transmits the data to the display device. The operator dynamically adjusts various operating parameters based on the real-time data to ensure that the reaction is in the optimal state. This achieves the combination of the unique reaction environment of the microdroplet interface with plasma technology, promoting the high-efficiency interaction between electrons, active oxygen species, and water molecules, thereby realizing the green preparation of hydrogen peroxide with low energy consumption and no need for external chemical additives.

[0008] Preferably, an air inlet pipe and a liquid sampling pipe are symmetrically fixedly connected to the bottom of the reactor. A sealing cap is threaded onto the outer wall of the liquid sampling pipe. An air outlet pipe is fixedly connected to the outer wall of the ferrule connector and the top of the reactor. One end of the air outlet pipe is fixedly connected to the input end of the gas chromatograph. A drying oven is installed on the outer wall of the air outlet pipe.

[0009] Preferably, the disturbance component includes a rotating shaft, the outer wall of which is rotatably connected through the low temperature chamber, the constant temperature bath, and the worktable. A rotating ring is fixedly connected to the top of the rotating shaft. The outer wall of the rotating ring is disposed in the constant temperature bath. Stirring blades are uniformly fixedly connected to the outer wall of the rotating ring. A driven bevel gear is fixedly connected to the bottom of the rotating ring.

[0010] Preferably, the clamping assembly includes a guide rod, both ends of which are fixedly connected to the low-temperature chamber. The outer wall of the guide rod is symmetrically slidably connected to a fixing plate. One end of each of the two fixing plates is internally threaded with a bidirectional screw. Both ends of the bidirectional screw are rotatably connected to the low-temperature chamber. One end of the bidirectional screw is fixedly connected to a handle. The fixing plates are used to install the reactor in the constant temperature bath. One of the fixing plates has a force-bearing plate fixedly connected to its outer wall.

[0011] Preferably, the striking assembly includes a mounting base, one side of which is fixedly connected to one side of the low-temperature chamber. A swing arm is rotatably connected inside the mounting base, and a striking hammer is fixedly connected to one end of the swing arm. The bottom of the striking hammer is in contact with the top of the force-bearing plate.

[0012] Preferably, the other end of the swing arm is fixedly connected to a mounting plate, a roller is rotatably connected to one side of the mounting plate, an eccentric wheel is abutted against the bottom of the roller, a support shaft is fixedly connected to the inner wall of the eccentric wheel, and one end of the support shaft is rotatably connected to one side of the low temperature chamber.

[0013] Preferably, a drive motor is installed inside the workbench, and a rotating shaft is fixedly connected to the output end of the drive motor. A driving bevel gear is fixedly connected to the outer wall of one end of the rotating shaft, and the tooth end of the driving bevel gear meshes with the tooth end of the driven bevel gear.

[0014] Preferably, a drive gear is fixedly connected to the other end of the rotating shaft, a transmission toothed belt is meshed with the outer wall of the drive gear, a driven gear is meshed with the inner wall of one end of the transmission toothed belt, and the inner wall of the driven gear is fixedly connected to the outer wall of the support shaft.

[0015] Preferably, a protective frame is fixedly connected to one side of the low-temperature chamber, and the outer walls of the driving gear, transmission belt, and driven gear are all disposed within the protective frame.

[0016] A highly efficient method for preparing hydrogen peroxide based on microdroplet plasma includes the following steps:

[0017] By turning the handle to drive the bidirectional screw to rotate, the two fixed clamps are separated to both sides along the guide rod. After placing the reactor in, turn the handle in the opposite direction to firmly clamp the reactor in the center of the constant temperature bath. The bottom of the reactor is submerged in water and maintains a vertical distance of about 1 cm from the ultrasonic atomizer.

[0018] Inject deionized water into the reactor, pass the high-voltage electrode through the ferrule and extend it downward into the reactor so that its tip is located at the center of the ground electrode, and install the high-voltage electrode on the reactor through the ferrule.

[0019] Then, the working atmosphere is introduced into the air inlet pipe. After the gas fills the inside of the reactor, the gas is continuously introduced for a period of time to exhaust the air in the reactor. Then, the temperature control system of the low temperature chamber is started to control the temperature of the cooling water in the constant temperature bath within the range of 5-20℃.

[0020] The DC power supply is turned on to power the ultrasonic atomizer. The ultrasonic atomizer generates a high-frequency resonance of about 2.4MHz, which disperses the liquid water into micro-droplets with a diameter of 1-10μm through the reactor. The working atmosphere continuously introduced from the air inlet pipe forms an upward carrier gas flow, which carries the micro-droplet group upward into the discharge zone in the middle of the reactor.

[0021] When the AC power supply is turned on, a high-frequency high-voltage AC power of 5-25kV and 5-25kHz is output, forming an atmospheric pressure non-thermal plasma between the high-voltage electrode and the ground electrode. Microdroplets react in the discharge area to synthesize hydrogen peroxide.

[0022] The drive motor is started to drive the rotating shaft to rotate. The rotating ring and stirring blades are driven to rotate at low speed in the constant temperature tank through the active bevel gear and the driven bevel gear to force the cooling water to circulate. At the same time, the eccentric wheel is driven to rotate through the active gear, the transmission belt and the driven gear, so that the hammer periodically strikes the force plate.

[0023] The oscilloscope acquires the output voltage and discharge current waveforms of the AC power supply in real time through a high-voltage probe and a differential probe. After the gaseous products are dried in a drying oven, they enter the gas chromatograph for online component analysis, and the analysis results are transmitted to the display.

[0024] The liquid products after the reaction are collected at the bottom of the reactor. The product is collected by opening the sealing cap on the outer wall of the liquid collection tube. After the reaction is completed, the AC power supply, DC power supply, drive motor, reaction atmosphere and cooling system of the low temperature chamber are turned off in sequence. The remaining liquid in the reactor is released by unscrewing the sealing cap.

[0025] This invention provides a highly efficient hydrogen peroxide preparation device and method based on microdroplet plasma. It has the following beneficial effects:

[0026] 1. This invention involves first injecting deionized water into a reactor, positioning the high-voltage electrode tip at the center of the ground electrode, then introducing gas to purge the air, activating the low-temperature temperature control system, and turning on the DC power supply to drive the ultrasonic atomization unit. High-frequency resonance disperses the water in the reactor into micro-droplets, while a carrier gas forms an upward airflow carrying the micro-droplets into the discharge region. An AC high-voltage power supply is then connected, creating a non-thermal plasma between the electrodes. The electric field at the micro-droplet interface and the plasma field work synergistically to generate various active species. Hydrogen peroxide is generated on the surface of the micro-droplets through free radical coupling and redox reactions. During operation, an oscilloscope collects electrical parameter waveforms in real time, and a gas chromatograph analyzes the gas phase components online and transmits the data to a display device. Operators dynamically adjust various operating parameters based on real-time data to ensure the reaction is in optimal condition. This invention combines the unique reaction environment of the micro-droplet interface with plasma technology, promoting efficient interactions between electrons, active oxygen species, and water molecules, thereby achieving low-energy, green preparation of hydrogen peroxide without the need for external chemical additives.

[0027] 2. In this invention, by starting the drive motor, the drive motor drives the rotating shaft to rotate at a low speed, so that the active bevel gear at one end of the rotating shaft drives the driven bevel gear to rotate, thereby driving the rotating shaft and the rotating ring to rotate. The stirring blades on the outer wall of the rotating ring rotate at a low speed in the constant temperature tank, forcibly circulating cooling water, eliminating temperature stratification, making the temperature of the outer wall of the reactor uniform, improving heat exchange efficiency, and inhibiting the thermal decomposition of hydrogen peroxide.

[0028] 3. In this invention, the driving gear at the other end of the rotating shaft drives the driven gear and the support shaft to rotate via a transmission belt. The support shaft drives the eccentric wheel to rotate, and the eccentric wheel periodically pushes the roller, causing the mounting plate to drive the swing arm to swing back and forth around the mounting base. The hammer at one end of the swing arm periodically strikes the force plate. The striking force of the hammer is transmitted to the fixed clamping plate through the force plate, and then to the outer wall of the reactor through the fixed clamping plate. This causes the micro-droplets and condensate droplets attached to the inner wall of the reactor to fall off more quickly, reducing the absorption and loss of plasma energy by the liquid film, and improving the collection rate of hydrogen peroxide liquid phase products. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 This is a schematic diagram of a partial structure of the low-temperature greenhouse of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of the reactor of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of the constant temperature bath of the present invention;

[0033] Figure 5 This is a schematic diagram of the low-temperature greenhouse planar structure of the present invention;

[0034] Figure 6 This is a partial structural diagram of the clamping assembly of the present invention;

[0035] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle.

[0036] The components include: 1. Workbench; 2. Low-temperature chamber; 201. Thermostatic bath; 202. Reactor; 203. Connecting rod; 204. Ultrasonic nebulizer; 205. AC power supply; 206. DC power supply; 207. Oscilloscope; 208. Gas chromatograph; 209. Ground electrode; 210. Compression fitting; 211. High-voltage electrode; 212. Monitor; 3. Inlet pipe; 301. Liquid sampling pipe; 302. Sealing cap; 303. Outlet pipe; 304. Drying oven; 4. Rotating shaft; 401. Rotating ring. 402. Stirring blade; 403. Driven bevel gear; 5. Guide rod; 501. Fixing clamp; 502. Double-acting screw; 503. Handle; 6. Drive motor; 601. Rotating shaft; 602. Driving bevel gear; 603. Driving gear; 604. Transmission belt; 605. Driven gear; 606. Support shaft; 607. Protective frame; 7. Mounting base; 701. Rocker arm; 702. Striking hammer; 703. Force plate; 704. Mounting plate; 705. Roller; 706. Eccentric wheel. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see the appendix Figure 1 - Appendix Figure 7 This invention provides a high-efficiency hydrogen peroxide preparation device based on microdroplet plasma, including a workbench 1, a low-temperature chamber 2 fixedly connected to the top of the workbench 1, a constant temperature bath 201 fixedly connected inside the low-temperature chamber 2, a reactor 202 disposed inside the constant temperature bath 201, connecting rods 203 symmetrically fixedly connected to the bottom inner wall of the constant temperature bath 201, an ultrasonic nebulizer 204 installed at one end of the two connecting rods 203, an AC power supply 205, a DC power supply 206, a gas chromatograph 208 and a display 212 respectively installed on the top of the workbench 1, an oscilloscope 207 installed on the top of the AC power supply 205, a ground electrode 209 disposed in the middle of the reactor 202, a compression fitting 210 assembled on the top of the reactor 202, a high-voltage electrode 211 penetratingly installed inside the compression fitting 210, the bottom of the high-voltage electrode 211 being located at the center of the ground electrode 209, a clamping assembly and a disturbance assembly installed inside the low-temperature chamber 2, and a striking assembly installed on one side of the low-temperature chamber 2.

[0039] Specifically, deionized water is injected into reactor 202. Then, high-voltage electrode 211 is passed through ferrule connector 210 and extended downward into reactor 202, with its tip located at the center of ground electrode 209. This makes the electric field distribution more uniform, forms a stable axisymmetric discharge region, and improves the uniformity of plasma and energy utilization efficiency. Then, high-voltage electrode 211 is installed on reactor 202 through ferrule connector 210. After gas enters reactor 202 and fills the entire reaction space, it is continuously ventilated for a period of time to exhaust the air and form a stable working atmosphere environment.

[0040] Subsequently, the temperature control system of the low-temperature chamber 2 is activated to control the temperature of the cooling water in the constant temperature bath 201 within the set range of 5-20℃, providing a stable low-temperature environment for the subsequent reaction, effectively inhibiting the thermal decomposition of the subsequently generated hydrogen peroxide, and improving the product yield. The DC power supply 206 is activated to power the ultrasonic atomizer 204. The ultrasonic atomizer 204 generates a high-frequency resonance of about 2.4MHz, which is transmitted through the reactor 202 to the deionized water at the bottom of the reactor 202, breaking the liquid water into micro-droplet groups with a diameter of 1-10μm. At the same time, the working atmosphere continuously introduced from the air inlet pipe 3 forms an upward carrier gas flow, which carries the suspended micro-droplet groups upward, allowing the micro-droplets to gradually enter the discharge zone in the middle of the reactor 202.

[0041] Then, the AC power supply 205 is turned on, outputting a high-frequency, high-voltage AC power of 5-25kV and 5-25kHz, which is applied to the high-voltage electrode 211 through a wire. A strong electric field is formed between the tip of the high-voltage electrode 211 and the ground electrode 209 wrapped around the outer wall of the reactor 202, which breaks down the gas to generate atmospheric pressure non-thermal plasma. The microdroplet group enters the plasma discharge zone of the ground electrode 209 region with the airflow. The interface electric field spontaneously formed on the surface of the microdroplets and the plasma field work together to promote the efficient transfer of electrons from the plasma gas phase to the microdroplet liquid phase. Under the action of the plasma, the working atmosphere is excited to generate highly active species such as hydroxyl radicals, superoxide anions, and singlet oxygen, which undergo coupling reactions on the surface of the microdroplets. Hydrogen peroxide is rapidly synthesized through ·OH coupling reaction or electron redox reaction. This realizes the combination of the unique reaction environment of the microdroplet interface with plasma technology, promoting the high-efficiency interaction between electrons, active oxygen species and water molecules, thereby achieving green preparation of hydrogen peroxide with low energy consumption and no need for external chemical additives.

[0042] During operation, the oscilloscope 207 acquires the output voltage and discharge current waveforms of the AC power supply 205 in real time through its high-voltage probe and differential probe, calculates and displays the instantaneous power and average power of the reactor 202, and the gas chromatograph 208 transmits the detected gaseous product component data to the display 212. The operator can observe the reaction operation status in real time. Based on the monitored data, the operator can dynamically adjust parameters such as the output voltage and frequency of the AC power supply 205, the output power of the DC power supply 206, and the flow rate of the reaction atmosphere to obtain the optimal reaction conditions. The perturbation component forces the circulating cooling water to eliminate temperature stratification, making the temperature of the outer wall of the reactor 202 uniform, improving heat exchange efficiency, and inhibiting the thermal decomposition of hydrogen peroxide. The tapping component accelerates the dripping of micro-droplets and condensate droplets attached to the inner wall of the reactor 202, reducing the absorption and loss of plasma energy by the liquid film, and improving the collection rate of hydrogen peroxide liquid phase products.

[0043] Please see the appendix Figure 1 - Appendix Figure 3 The bottom of the reactor 202 is symmetrically and fixedly connected with an inlet pipe 3 and a liquid collection pipe 301. The outer wall of the liquid collection pipe 301 is threaded with a sealing cap 302. The outer wall of the compression fitting 210 and the top of the reactor 202 are jointly and fixedly connected with an outlet pipe 303. One end of the outlet pipe 303 is fixedly connected to the input end of the gas chromatograph 208. A drying oven 304 is installed on the outer wall of the outlet pipe 303.

[0044] Specifically, a working atmosphere is introduced into the air inlet pipe 3. The working atmosphere includes, but is not limited to, argon or a mixture of argon and oxygen.

[0045] After the reaction, the microdroplets fall naturally under the action of gravity, or are accelerated to fall by the action of knocking and vibration, and collect at the bottom of the reactor 202. By opening the sealing cap 302 on the outer wall of the liquid collection tube 301, a high concentration of hydrogen peroxide solution can be collected.

[0046] Meanwhile, the gaseous products generated during the reaction, such as hydrogen and unreacted oxygen, rise with the carrier gas and enter the outlet pipe 303 through the compression fitting 210. First, they pass through the drying oven 304 to remove moisture, and then enter the gas chromatograph 208 for online component analysis. The analysis results are displayed on the display 212 in real time to monitor the reaction process and optimize the reaction conditions.

[0047] When the reaction is finished, first turn off the AC power supply 205, then turn off the DC power supply 206 and the drive motor 6, and finally turn off the refrigeration system of the reaction atmosphere and the low temperature chamber 2. Unscrew the sealing cap 302 on the liquid extraction pipe 301 to release the liquid remaining in the reactor 202.

[0048] Please see the appendix Figure 4 Appendix Figure 5 The disturbance component includes a rotating shaft 4, the outer wall of which is rotatably connected through the low temperature chamber 2, the constant temperature bath 201 and the workbench 1. A rotating ring 401 is fixedly connected to the top of the rotating shaft 4. The outer wall of the rotating ring 401 is set in the constant temperature bath 201. Stirring blades 402 are uniformly fixedly connected to the outer wall of the rotating ring 401. A driven bevel gear 403 is fixedly connected to the bottom of the rotating ring 401.

[0049] The workbench 1 is equipped with a drive motor 6. The output end of the drive motor 6 is fixedly connected to a rotating shaft 601. One end of the rotating shaft 601 is fixedly connected to a driving bevel gear 602. The tooth end of the driving bevel gear 602 is meshed with the tooth end of the driven bevel gear 403.

[0050] Specifically, during the discharge reaction, the drive motor 6 starts and drives the rotating shaft 601 to rotate at a low speed. This causes the active bevel gear 602 at one end of the rotating shaft 601 to drive the driven bevel gear 403 to rotate, which in turn drives the rotating shaft 4 and the rotating ring 401 to rotate. The stirring blades 402 on the outer wall of the rotating ring 401 rotate at a low speed in the constant temperature bath 201, forcibly circulating cooling water to eliminate temperature stratification, making the temperature of the outer wall of the reactor 202 uniform, improving heat exchange efficiency, and inhibiting the thermal decomposition of hydrogen peroxide.

[0051] Please see the appendix Figure 4 -Appendix Figure 7The clamping assembly includes a guide rod 5, both ends of which are fixedly connected to the low-temperature chamber 2. The outer wall of the guide rod 5 is symmetrically slidably connected to a fixing clamp 501. One end of each fixing clamp 501 is internally threaded with a bidirectional screw 502. Both ends of the bidirectional screw 502 are rotatably connected to the low-temperature chamber 2. One end of the bidirectional screw 502 is fixedly connected to a handle 503. The fixing clamp 501 is used to install the reactor 202 in the constant temperature bath 201. One of the fixing clamps 501 has a force-bearing plate 703 fixedly connected to its outer wall.

[0052] Specifically, rotating the handle 503 of the clamping assembly causes the bidirectional screw 502 to rotate, causing the two fixed clamping plates 501 to separate to both sides along the guide rod 5. Then, the reactor 202 is placed between the two fixed clamping plates 501. Rotating the handle 503 in the opposite direction causes the two fixed clamping plates 501 to move towards each other, firmly clamping the reactor 202 in the center of the constant temperature bath 201. The bottom of the reactor 202 is submerged in water, while the bottom of the reactor 202 maintains a vertical distance of about 1 cm from the ultrasonic atomizer 204.

[0053] Please see the appendix Figure 4 -Appendix Figure 7 The striking assembly includes a mounting base 7, one side of which is fixedly connected to one side of the low-temperature chamber 2. A swing rod 701 is rotatably connected inside the mounting base 7. A striking hammer 702 is fixedly connected to one end of the swing rod 701. The bottom of the striking hammer 702 is in contact with the top of the force plate 703.

[0054] The other end of the swing arm 701 is fixedly connected to the mounting plate 704. A roller 705 is rotatably connected to one side of the mounting plate 704. An eccentric wheel 706 is abutted against the bottom of the roller 705. A support shaft 606 is fixedly connected to the inner wall of the eccentric wheel 706. One end of the support shaft 606 is rotatably connected to one side of the low temperature chamber 2.

[0055] The other end of the rotating shaft 601 is fixedly connected to the driving gear 603. The outer wall of the driving gear 603 is meshed with the transmission belt 604. The inner wall of one end of the transmission belt 604 is meshed with the driven gear 605. The inner wall of the driven gear 605 is fixedly connected to the outer wall of the support shaft 606.

[0056] A protective frame 607 is fixedly connected to one side of the low-temperature greenhouse 2. The outer walls of the drive gear 603, the transmission belt 604, and the driven gear 605 are all set inside the protective frame 607.

[0057] Specifically, simultaneously, the driving gear 603 at the other end of the rotating shaft 601 drives the driven gear 605 and the support shaft 606 to rotate via the transmission belt 604. The support shaft 606 drives the eccentric wheel 706 to rotate. The eccentric wheel 706 periodically pushes the roller 705, causing the mounting plate 704 to drive the rocker arm 701 to swing back and forth around the mounting base 7. When the eccentric wheel 706 pushes the roller 705, the rocker arm 701 drives the striking hammer 702 to lift upward. When the eccentric wheel 706 continues to move away from the roller 705, the striking hammer 702 at one end of the rocker arm 701 is lifted upward. The hammer 702 periodically strikes the force plate 703 under the action of force. The striking force of the hammer 702 is transmitted to the fixed clamp 501 through the force plate 703, and then to the outer wall of the reactor 202 through the fixed clamp 501. This causes the micro-droplets and condensate droplets attached to the inner wall of the reactor 202 to fall off faster, reducing the absorption and loss of plasma energy by the liquid film. At the same time, it improves the collection rate of hydrogen peroxide liquid phase products. The vibration amplitude generated by the hammering is extremely small and will not affect the relative position between the high voltage electrode 211 and the ground electrode 209. Therefore, it will not damage the stability of plasma discharge.

[0058] The protective frame 607 provides sealed protection for the driving gear 603, the transmission belt 604, and the driven gear 605, ensuring the stability of the transmission.

[0059] A highly efficient method for preparing hydrogen peroxide based on microdroplet plasma includes the following steps:

[0060] By rotating the handle 503, the bidirectional screw 502 is rotated, causing the two fixed clamps 501 to separate to both sides along the guide rod 5. After placing the reactor 202 in the reactor, the handle 503 is rotated in the opposite direction to firmly clamp the reactor 202 in the center of the constant temperature bath 201. The bottom of the reactor 202 is submerged in water and maintains a vertical distance of about 1 cm from the ultrasonic atomizer 204.

[0061] Deionized water is injected into reactor 202. High-voltage electrode 211 is passed through ferrule connector 210 and extended downward into reactor 202, with its tip located at the center of ground electrode 209. High-voltage electrode 211 is installed on reactor 202 through ferrule connector 210.

[0062] Then, the working atmosphere is introduced into the air inlet pipe 3. After the gas fills the inside of the reactor 202, the gas is continuously introduced for a period of time to exhaust the air in the reactor 202. Then, the temperature control system of the low temperature chamber 2 is started to control the cooling water temperature in the constant temperature bath 201 within the range of 5-20℃.

[0063] The DC power supply 206 is turned on to power the ultrasonic atomizer 204. The ultrasonic atomizer 204 generates a high-frequency resonance of about 2.4MHz, which disperses the liquid water into micro-droplet groups with a diameter of 1-10μm through the reactor 202. The working atmosphere continuously introduced from the air inlet pipe 3 forms an upward carrier gas flow, which carries the micro-droplet groups upward into the discharge area in the middle of the reactor 202.

[0064] When AC power supply 205 is turned on, it outputs high-frequency high-voltage AC power of 5-25kV and 5-25kHz, forming atmospheric pressure non-thermal plasma between high-voltage electrode 211 and ground electrode 209. Microdroplets react in the discharge area to synthesize hydrogen peroxide.

[0065] The drive motor 6 is started to drive the rotating shaft 601 to rotate. The rotating ring 401 and the stirring blade 402 are driven to rotate at low speed in the constant temperature tank 201 through the active bevel gear 602 and the driven bevel gear 403, which is used to force the circulation of cooling water. At the same time, the eccentric wheel 706 is driven to rotate through the active gear 603, the transmission toothed belt 604 and the driven gear 605, so that the hammer 702 periodically strikes the force plate 703.

[0066] The oscilloscope 207 acquires the output voltage and discharge current waveforms of the AC power supply 205 in real time through the high voltage probe and differential probe. After the gaseous products are dried in the drying oven 304, they enter the gas chromatograph 208 for online component analysis. The analysis results are transmitted to the display 212.

[0067] The liquid products after the reaction are collected at the bottom of reactor 202. The sealing cap 302 on the outer wall of the liquid collection pipe 301 is opened to collect the products. After the reaction is completed, the AC power supply 205, DC power supply 206, drive motor 6, and the refrigeration system of the reaction atmosphere and low temperature chamber 2 are turned off in sequence. The sealing cap 302 is unscrewed to release the liquid remaining in reactor 202.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency hydrogen peroxide preparation device based on microdroplet plasma, comprising a worktable (1), characterized in that: A low-temperature chamber (2) is fixedly connected to the top of the workbench (1). A constant-temperature bath (201) is fixedly connected inside the low-temperature chamber (2). A reactor (202) is installed inside the constant-temperature bath (201). Connecting rods (203) are symmetrically fixedly connected to the bottom inner wall of the constant-temperature bath (201). An ultrasonic nebulizer (204) is installed at one end of each of the two connecting rods (203). An AC power supply (205), a DC power supply (206), a gas chromatograph (208), and a display are respectively installed on the top of the workbench (1). (212) An oscilloscope (207) is installed on the top of the AC power supply (205). A ground electrode (209) is provided in the middle of the reactor (202). A ferrule connector (210) is assembled on the top of the reactor (202). A high-voltage electrode (211) is installed through the ferrule connector (210). The bottom of the high-voltage electrode (211) is located at the center of the ground electrode (209). A clamping assembly and a disturbance assembly are installed inside the low-temperature chamber (2). A knocking assembly is installed on one side of the low-temperature chamber (2).

2. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 1, characterized in that: The bottom of the reactor (202) is symmetrically and fixedly connected with an air inlet pipe (3) and a liquid collection pipe (301). The outer wall of the liquid collection pipe (301) is threaded with a sealing cap (302). The outer wall of the ferrule connector (210) and the top of the reactor (202) are jointly and fixedly connected with an air outlet pipe (303). One end of the air outlet pipe (303) is fixedly connected to the input end of the gas chromatograph (208). A drying oven (304) is installed on the outer wall of the air outlet pipe (303).

3. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 1, characterized in that: The disturbance component includes a rotating shaft (4), the outer wall of which is rotatably connected through the low temperature chamber (2), the constant temperature bath (201) and the workbench (1). A rotating ring (401) is fixedly connected to the top of the rotating shaft (4), the outer wall of which is set in the constant temperature bath (201), and stirring blades (402) are uniformly fixedly connected to the outer wall of the rotating ring (401). A driven bevel gear (403) is fixedly connected to the bottom of the rotating ring (401).

4. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 1, characterized in that: The clamping assembly includes a guide rod (5), both ends of which are fixedly connected to the low-temperature chamber (2). The outer wall of the guide rod (5) is symmetrically slidably connected with a fixing plate (501). One end of each of the two fixing plates (501) is internally threaded with a bidirectional screw (502). Both ends of the bidirectional screw (502) are rotatably connected to the low-temperature chamber (2). One end of the bidirectional screw (502) is fixedly connected with a handle (503). The fixing plate (501) is used to install the reactor (202) in the constant temperature bath (201). One of the fixing plates (501) has a force-bearing plate (703) fixedly connected to its outer wall.

5. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 1, characterized in that: The striking assembly includes a mounting base (7), one side of which is fixedly connected to one side of the low-temperature chamber (2). A swing rod (701) is rotatably connected inside the mounting base (7). A striking hammer (702) is fixedly connected to one end of the swing rod (701). The bottom of the striking hammer (702) is in contact with the top of the force plate (703).

6. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 5, characterized in that: The other end of the swing arm (701) is fixedly connected to a mounting plate (704). A roller (705) is rotatably connected to one side of the mounting plate (704). An eccentric wheel (706) is abutted against the bottom of the roller (705). A support shaft (606) is fixedly connected to the inner wall of the eccentric wheel (706). One end of the support shaft (606) is rotatably connected to one side of the low-temperature chamber (2).

7. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 1, characterized in that: The workbench (1) is equipped with a drive motor (6), and the output end of the drive motor (6) is fixedly connected to a rotating shaft (601). One end of the rotating shaft (601) is fixedly connected to an active bevel gear (602), and the tooth end of the active bevel gear (602) is meshed with the tooth end of the driven bevel gear (403).

8. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 7, characterized in that: The other end of the rotating shaft (601) is fixedly connected to a drive gear (603), the outer wall of the drive gear (603) is meshed with a transmission toothed belt (604), the inner wall of one end of the transmission toothed belt (604) is meshed with a driven gear (605), and the inner wall of the driven gear (605) is fixedly connected to the outer wall of the support shaft (606).

9. The high-efficiency hydrogen peroxide preparation device based on microdroplet plasma according to claim 8, characterized in that: A protective frame (607) is fixedly connected to one side of the low-temperature greenhouse (2), and the outer walls of the driving gear (603), the transmission belt (604) and the driven gear (605) are all set inside the protective frame (607).

10. A highly efficient method for preparing hydrogen peroxide based on microdroplet plasma, characterized in that: The apparatus for preparing high-efficiency hydrogen peroxide based on microdroplet plasma, as described in any one of claims 1-9, comprises the following steps: When in use, the double screw (502) is rotated by turning the handle (503), so that the two fixed clamps (501) are separated to both sides along the guide rod (5). After placing the reactor (202), the handle (503) is turned in the opposite direction to firmly clamp the reactor (202) in the center of the constant temperature bath (201). The bottom of the reactor (202) is submerged in water and maintains a vertical distance of about 1 cm from the ultrasonic atomizer (204). Deionized water is injected into the reactor (202). The high-voltage electrode (211) is passed through the ferrule connector (210) and extended downward into the reactor (202) so that its tip is located at the center of the ground electrode (209). The high-voltage electrode (211) is installed on the reactor (202) through the ferrule connector (210). Then, the working atmosphere is introduced into the air inlet pipe (3). After the gas fills the inside of the reactor (202), the gas is continuously introduced for a period of time to exhaust the air in the reactor (202). The temperature control system of the low temperature chamber (2) is started to control the temperature of the cooling water in the constant temperature bath (201) within the range of 5-20℃. The DC power supply (206) is turned on to power the ultrasonic atomizer (204). The ultrasonic atomizer (204) generates a high-frequency resonance of about 2.4MHz. The liquid water is dispersed into micro-droplet groups with a diameter of 1-10μm through the reactor (202). The working atmosphere continuously introduced from the air inlet pipe (3) forms an upward carrier gas flow, which carries the micro-droplet groups upward into the discharge zone in the middle of the reactor (202). The AC power supply (205) is turned on, and a high-frequency high-voltage AC power of 5-25kV and 5-25kHz is output. Atmospheric pressure non-thermal plasma is formed between the high-voltage electrode (211) and the ground electrode (209). Microdroplets react in the discharge area to synthesize hydrogen peroxide. The drive motor (6) is started to drive the rotating shaft (601) to rotate. The rotating ring (401) and stirring blade (402) are driven to rotate at low speed in the constant temperature tank (201) through the active bevel gear (602) and driven bevel gear (403) to force the cooling water to circulate. At the same time, the eccentric wheel (706) is driven to rotate through the active gear (603), transmission belt (604) and driven gear (605) to make the hammer (702) periodically strike the force plate (703). The oscilloscope (207) acquires the output voltage and discharge current waveforms of the AC power supply (205) in real time through the high voltage probe and differential probe. After the gas phase product is dried in the drying oven (304) to remove moisture, it enters the gas chromatograph (208) for online component analysis. The analysis results are transmitted to the display (212). The liquid products after the reaction are collected at the bottom of the reactor (202). The sealing cap (302) on the outer wall of the liquid collection pipe (301) is opened to collect the products. After the reaction is completed, the AC power supply (205), DC power supply (206), drive motor (6), and the refrigeration system of the reaction atmosphere and low temperature chamber (2) are turned off in sequence. The sealing cap (302) is unscrewed to release the liquid remaining in the reactor (202).

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