Coaxial dielectric barrier discharge plasma activated water reactor

Abstract

The present application relates to the technical fields of activated water reactor, and discloses a coaxial dielectric barrier discharge plasma activated water reactor. When in use, the water to be treated flows into the overflow tank through the water inlet pipe, and then flows down along the inner wall of the overflow pipe and the insulation connecting pipe in the form of water film, and flows through the discharge area. The working gas enters the inner electrode pipe through the gas inlet pipe, and then flows into the discharge area through the inner electrode groove. When the working gas flows into the discharge area, the impact force of the working gas on the liquid further ensures that the liquid flows down along the inner wall of the insulation connecting pipe in the form of water film. The inner and outer electrodes cause the working gas to discharge to generate plasma, and the plasma activates the water. Part of the activated water directly flows out of the discharge area along the inner wall of the insulation connecting pipe, and part of the activated water is discharged from the discharge area through the inner electrode groove to avoid accumulation in the discharge area. Then, the activated water flows into the three-way valve. The reactor has stable and uniform discharge, high yield of active species, small device volume, large liquid treatment capacity, and can realize instant customized plasma activated water.

Description

Technical Field

[0001] This invention relates to the field of activated water reactor technology, and specifically to a coaxial dielectric barrier discharge plasma activated water reactor. Background Technology

[0002] Existing activated water reactors suffer from the following significant drawbacks: Single-jet systems, due to limited jet diameter and active species diffusion range, are difficult to process large volumes of water in a short time, resulting in low production capacity. Multi-jet combined systems are complex and expensive, have poor scalability, and jet interference leads to inconsistent activated water quality. Dielectric barrier discharge systems have limited discharge areas, insufficient gas-liquid mass transfer, and incomplete water treatment. Summary of the Invention

[0003] The purpose of this invention is to provide a coaxial dielectric barrier discharge plasma activated water reactor, which has stable and uniform discharge, high yield of active species, consistent high quality of activated water, small device size but large liquid processing capacity, and can realize on-demand customized plasma activated water.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A coaxial dielectric barrier discharge plasma activated water reactor includes an inlet pipe, a straight pipe, an overflow tank, a sleeve, a three-way valve, a mesh-like external electrode, and an internal electrode tube.

[0005] A connecting chuck is provided on the outer periphery of the intake pipe, and the connecting chuck, straight pipe, overflow groove, sleeve and three-way valve are fixedly connected in sequence.

[0006] The first end of the intake pipe is located outside the straight pipe, and the last end of the intake pipe is located inside the straight pipe.

[0007] The overflow trough is connected to a water inlet pipe, and an overflow pipe is installed inside the overflow trough, which is connected to the straight pipe.

[0008] The sleeve has an insulating connecting tube, the first end of which is connected to the overflow pipe, and the last end of which is connected to one of the ports of the three-way valve.

[0009] The mesh-like outer electrode covers the outer periphery of the insulating connecting tube, and the mesh-like outer electrode is located inside the sleeve.

[0010] The first end of the inner electrode tube is connected to the end of the air intake pipe, the end of the inner electrode tube passes through the overflow pipe and is inserted into the insulating connecting pipe, and the inner electrode tube is grounded.

[0011] The central axes of the inner electrode tube, the air inlet tube, the insulating connecting tube, and the mesh-like outer electrode coincide, and the mesh-like outer electrode and the inner electrode tube form a discharge region.

[0012] The inner electrode tube has multiple inner electrode slots, all of which are located within the discharge area. The inner electrode slots are used to discharge gas from the inner electrode tube into the discharge area, thereby impacting the liquid within the discharge area and causing the liquid to flow down as a water film along the inner wall of the insulating connecting tube.

[0013] In at least one embodiment of the coaxial dielectric barrier discharge plasma activated water reactor provided by this disclosure, a three-toothed annular fixing member is provided between the inner electrode tube and the insulating connecting tube.

[0014] In at least one embodiment of the coaxial dielectric barrier discharge plasma activated water reactor provided by this disclosure, a plurality of the inner electrode slots are arranged in a ring array with the central axis of the inner electrode tube as the center.

[0015] In at least one embodiment of the coaxial dielectric barrier discharge plasma activated water reactor provided in this disclosure, guide tubes are provided at both ends of the sleeve.

[0016] The guide tube is inserted into the guide tube base to fix the insulating connecting tube; The insulating connecting tube passes through the gauge base.

[0017] The coaxial dielectric barrier discharge plasma activated water reactor provided in at least one embodiment of this disclosure also includes a feed bottle and a peristaltic pump.

[0018] The other port of the three-way valve is connected to the inlet of the feed bottle, the outlet of the feed bottle is connected to the inlet of the peristaltic pump, and the outlet of the peristaltic pump is connected to the inlet pipe.

[0019] The coaxial dielectric barrier discharge plasma activated water reactor provided in at least one embodiment of this disclosure further includes: a variable diameter ferrule connector.

[0020] The inner electrode tube and the air intake tube are configured to be connected via the variable diameter ferrule connector.

[0021] The coaxial dielectric barrier discharge plasma activated water reactor provided in at least one embodiment of this disclosure further includes a rinsing component.

[0022] The flushing component is configured to connect to the last port of the three-way valve.

[0023] In at least one embodiment of the coaxial dielectric barrier discharge plasma activated water reactor provided by this disclosure, a sealing element is provided at the end of the inner electrode tube.

[0024] In at least one embodiment of the coaxial dielectric barrier discharge plasma activated water reactor provided in this disclosure, the sleeve is an insulating sleeve.

[0025] The beneficial effects of this invention are as follows: the device adopts dielectric barrier discharge, which suppresses the formation of electric arc, and the discharge is stable and uniform. It can generate a large area of ​​low-temperature plasma, prevent the plasma from activating the water temperature too high, ensure that it is suitable for acting on organisms, and ensure that the activated water quality is consistently high.

[0026] An overflow trough is installed so that the liquid flows down the inner wall of the insulating connecting pipe in the form of a water film. Multiple inner electrode troughs are set on the inner electrode tube to discharge gas. When the gas flows into the discharge area, the impact force on the liquid further ensures that the liquid flows down the inner wall of the insulating connecting pipe in the form of a water film, thereby increasing the gas-liquid contact area, improving the gas-liquid mass transfer effect, and increasing the yield of active species in plasma-activated water.

[0027] The inner electrode tube, air inlet tube, insulating connecting tube, and mesh-like outer electrode form a coaxial structure, which improves the uniformity of discharge. The sleeve prevents foreign objects from contacting the high-voltage outer electrode, thus enhancing the safety of the device. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a perspective view of a coaxial dielectric barrier discharge plasma activated water reactor according to the present invention.

[0030] Figure 2 This is a cross-sectional view of a coaxial dielectric barrier discharge plasma activated water reactor according to the present invention.

[0031] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0032] Figure 4 This is a schematic diagram of the structure of a coaxial dielectric barrier discharge plasma activated water reactor after the sleeve has been removed, according to the present invention.

[0033] Figure 5 This is a schematic diagram showing the distribution of the gauge base and the inner electrode tube.

[0034] Figure 6 This is a schematic diagram showing the connection between the intake pipe and the internal electrode tube.

[0035] Figure 7 This is a partial structural diagram of the internal electrode tube.

[0036] Figure 8 This is a partial cross-sectional view of the insulating connecting tube and the inner electrode tube.

[0037] In the picture: 10. Intake pipe; 11. Connecting chuck; 12. Variable diameter ferrule fitting; 20. Straight pipes of equal diameter; 30. Overflow channel; 31. Overflow pipe; 32. Inlet pipe; 40. Guiding tube base; 50. Insulating connecting pipe; 60. Three-way valve; 70. Internal electrode tube; 71. Internal electrode groove; 80. Three-toothed ring fastener; 90. Sealing components; 100. Tubular external electrode; 110. Sleeve; 111. Guide tube; 112. Square hole. Detailed Implementation

[0038] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0039] Example like Figures 1 to 8 As shown, this embodiment provides a coaxial dielectric barrier discharge plasma activated water reactor, which includes an inlet pipe 10, a straight pipe of equal diameter 20, an overflow trough 30, a gauge base 40, an insulating connecting pipe 50, a three-way valve 60, an inner electrode tube 70, a three-tooth annular fixing component 80, a sealing component 90, a mesh-like outer electrode 100, a sleeve 110, a peristaltic pump (not shown), and a feed bottle (not shown).

[0040] Specifically, the intake pipe 10 is made of stainless steel and is equipped with a connecting chuck 11 of KF50 specification. The outer diameter of the intake pipe 10 is 10mm and the inner diameter is 8mm. The connecting chuck 11 has a grooved end, which connects to the equal-diameter straight pipe 20 using a KF50 quick-connect clamp. The first end of the intake pipe 10 is located outside the equal-diameter straight pipe 20, and the second end is located inside the equal-diameter straight pipe 20. The first end of the intake pipe 10 can be connected to a gas pipe using a ferrule to quick-connect fitting. The second end of the intake pipe 10 connects to the inner electrode tube 70 using a reducing ferrule fitting 12. The function of the intake pipe 10 is to introduce gas into the reactor.

[0041] Specifically, the equal diameter straight tube 20 is made of stainless steel, with a specification of KF50 and a height of 80mm. One end is connected to the connecting chuck 11, and the other end is connected to the overflow groove 30. The connection method is KF50 clamp quick-connect connection. Its function is to accommodate the internal variable diameter ferrule connector 12, ensuring that the inner electrode tube 70 with different outer diameters can be replaced.

[0042] Specifically, the guide tube base 40 is made of stainless steel, with a specification of KF25 and an inner diameter of 15.5mm. Two guide tube bases 40 are provided. The function of the guide tube base 40 is to fix the insulating connecting tube 50.

[0043] Specifically, the overflow trough 30 is made of stainless steel and manufactured using metal 3D printing. One end has a specification of KF50, and the other end has a specification of KF25. An overflow pipe 31 is installed inside the overflow trough 30. The overflow pipe 31 has an outer diameter of 15mm, an inner diameter of 13mm, and a height of 29mm. A water inlet pipe 32 with an outer diameter of 10mm is provided on the side of the overflow trough 30. The KF50 end connects to a straight pipe 20 of equal diameter, and the KF25 end connects to one of the gauge pipe bases 40. Both connections are quick-connect using clamps. The function of the overflow trough 30 is to allow liquid to flow into the reactor, causing the liquid to overflow and form a uniform water film on the inner wall of the insulating connecting pipe 50.

[0044] Specifically, the insulating connecting tube 50 is made of high-purity quartz material, with an outer diameter of 15mm, an inner diameter of 13mm, and a length of 200mm. Both ends of the insulating connecting tube 50 are connected to two gauge tube bases 40 respectively, and the connection method is a single-ring sealed connection. The insulating connecting tube 50 serves as a dielectric layer material to block discharge, prevent arc discharge, and make the discharge more uniform.

[0045] Specifically, the three-way valve 60 is made of stainless steel, with all three ports being KF25, and the ball is an L-shaped ball. The upper port of the three-way valve 60 is connected to one of the gauge bases 40. The flushing component is connected to the right port of the three-way valve 60 and is used to draw plasma-activated water for flushing medical devices.

[0046] The left port of the three-way valve 60 is connected to a silicone tube via a KF hose connector, which is then connected to the inlet of the feed bottle to discharge plasma-activated water into the feed bottle. The outlet of the feed bottle is connected to the peristaltic pump inlet via a silicone tube, and the outlet of the peristaltic pump is connected to the inlet pipe 32 via a silicone tube to pump the plasma-activated water into the overflow tank 30 for the next cycle.

[0047] During use, add the water to be treated to the replenishment bottle. A peristaltic pump then pumps the water from the inlet pipe 32 into the overflow tank 30. The water volume in the overflow tank 30 gradually increases, eventually overflowing from the overflow pipe 31 and flowing downwards along the inner walls of the overflow pipe 31 and the insulating connecting pipe 50. After passing through the discharge area, it flows into the three-way valve 60. If the water sample needs to be circulated, do not turn the handle of the three-way valve 60, allowing the plasma-activated water to flow out from the left port of the three-way valve 60. If the plasma-activated water needs to be used, turn the handle of the three-way valve 60, and the activated water will flow out from the right port of the three-way valve 60, then into a medical high-pressure water gun for rinsing items to be disinfected.

[0048] Specifically, the inner electrode tube 70 is made of stainless steel, with an outer diameter of 8 mm, an inner diameter of 6 mm, and a length of 225 mm. Multiple inner electrode grooves 71 are provided inside the inner electrode tube 70. Each inner electrode groove 71 has a groove length of 75 mm and a groove width of 1 mm. The distance between the lower end of each inner electrode groove 71 and the lower end of the inner electrode tube 70 is 7 mm. The inner electrode grooves 71 are connected to the inner electrode tube 70, allowing gas to escape from them. The included angle between adjacent inner electrode grooves 71 is 60°, and the inner electrode grooves 71 are evenly distributed on the surface of the inner electrode tube 70. The inner electrode tube 70 is grounded. The upper end of the inner electrode tube 70 is connected to the air inlet pipe 10 through a reducing fitting 12. Gas enters the inner electrode tube 70 through the air inlet pipe 10 and flows into the discharge area through the inner electrode groove 71. The impact force of the gas on the liquid when it flows out further ensures that the liquid flows down the inner wall of the insulating connecting pipe 50 as a water film. At the same time, some liquid can be discharged from the discharge area to avoid the accumulation of liquid in the discharge area.

[0049] Specifically, the three-toothed annular fastener 80 is made of thermoplastic polyurethane and is manufactured using 3D printing. The annular ring has an outer diameter of 11mm, an inner diameter of 8mm, and an outer diameter of 13mm for each tooth. The included angle between adjacent teeth is 120°, and the overall height is 8mm. It is tightly fitted onto the outer surface of the inner electrode tube 70. The distance between the lower end of the three-toothed annular fastener 80 and the inner electrode groove 71 is 7mm. The function of the three-toothed annular fastener 80 is to ensure the circumferential symmetry of the inner electrode tube 70, the insulating connecting tube 50, and the mesh-like outer electrode 100.

[0050] Specifically, the sealing element 90 is made of silicone and is cone-shaped. The lower diameter of the cone is 7mm, the upper diameter is 3mm, and the height is 7-8mm. It is tightly fitted into the end of the inner electrode tube 70. The function of the sealing element 90 is to prevent gas from being directly discharged through the end of the inner electrode tube 70, so that the gas can be fully utilized.

[0051] Specifically, the mesh-like external electrode 100 is made of stainless steel, with a wire diameter of 0.6 mm, a hole diameter of 4.5 mm, and a height of 60 mm, and is tightly fitted onto the outer surface of the insulating connecting tube 50. The upper end of the mesh-like external electrode 100 is level with the upper end of the inner electrode groove 71, and the lower end of the mesh-like external electrode 100 is level with the upper end of the three-toothed annular fixing member 80. The mesh-like external electrode 100 is connected to a high-voltage power supply via wires, and the area enclosed by it is the discharge area. The mesh structure can prevent the dielectric layer from overheating and reduce the "shielding effect" of the electrode on the discharge, making the discharge more uniform and stable.

[0052] Specifically, the sleeve 110 is made of acrylic material and has a cylindrical structure with an outer diameter of 100mm, a height of 156mm, and a thickness of 3mm. The two halves are planar symmetrical and are fixed with screws and nuts. One half has a square hole 112 with a length of 18mm and a width of 10mm for passing through a high-voltage wire. Guide tubes 111 are provided in the middle of both the upper and lower ends of the sleeve 110; the two guide tubes 111 are respectively tightly fitted onto the outer surface of the two gauge tube bases 40.

[0053] The working process of the coaxial dielectric barrier discharge plasma activated water reactor will be disclosed below: 1) The water to be treated flows into the overflow tank 30 through the inlet pipe 32. The amount of water in the overflow tank 30 gradually increases and then overflows the overflow pipe 31. It flows downward in a water film along the inner wall of the overflow pipe 31 and the insulating connecting pipe 50, and flows through the discharge area.

[0054] 2) The working gas enters the inner electrode tube 70 through the inlet pipe 10 and flows into the discharge area through the inner electrode groove 71. When the gas flows into the discharge area, it impacts the liquid, further ensuring that the liquid flows down the inner wall of the insulating connecting pipe 50 as a water film.

[0055] 3) The inner and outer electrodes form a discharge region, which triggers the discharge of the working gas to generate plasma. The active species in the gas undergo mass transfer and liquid-phase chemical reactions during contact with the liquid, generating plasma-activated water.

[0056] 4) Some of the activated water flows directly out of the discharge area along the inner wall of the insulating connecting pipe 50, and some of the activated water flows out of the discharge area through the inner electrode groove 71 and the inner electrode tube 70, thus avoiding accumulation in the discharge area. Then the activated water flows into the left port of the three-way valve 60.

[0057] If the plasma-activated water does not need to be circulated, turn the handle of the three-way valve 60, and the activated water will flow out from the right port of the three-way valve 60. It can be used directly or connected to a medical high-pressure water gun to rinse the items to be disinfected.

[0058] Although embodiments of this application have been shown and described above, the scope of protection of this invention is not limited thereto. Any variations or substitutions that can be conceived without inventive effort should be covered within the scope of protection of this invention. Unless expressly stated otherwise, no element, action or instruction used herein should be construed as critical or necessary.

Claims

1. A coaxial dielectric barrier discharge plasma activated water reactor, characterized in that, include: Intake pipe, straight pipe, overflow groove, sleeve, three-way valve, mesh-like outer electrode and inner electrode tube; A connecting chuck is provided on the outer periphery of the intake pipe, and the connecting chuck, straight pipe, overflow groove, sleeve and three-way valve are fixedly connected in sequence. The first end of the intake pipe is located outside the straight pipe, and the last end of the intake pipe is located inside the straight pipe; The overflow trough is connected to a water inlet pipe, and an overflow pipe is installed inside the overflow trough, which is connected to the straight pipe; The sleeve has an insulating connecting tube, the first end of which is connected to the overflow tube, and the last end of which is connected to one of the ports of the three-way valve. The mesh-like outer electrode covers the outer periphery of the insulating connecting tube, and the mesh-like outer electrode is located inside the sleeve; The first end of the inner electrode tube is connected to the end of the air intake pipe, the end of the inner electrode tube passes through the overflow pipe and is inserted into the insulating connecting pipe, and the inner electrode tube is grounded. The central axes of the inner electrode tube, the air inlet tube, the insulating connecting tube, and the mesh-like outer electrode coincide, and the mesh-like outer electrode and the inner electrode tube form a discharge region. The inner electrode tube has multiple inner electrode slots, all of which are located within the discharge area. The inner electrode slots are used to discharge gas from the inner electrode tube into the discharge area, thereby impacting the liquid within the discharge area and causing the liquid to flow down as a water film along the inner wall of the insulating connecting tube.

2. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 1, characterized in that, A three-toothed annular fixing member is provided between the inner electrode tube and the insulating connecting tube.

3. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 2, characterized in that, The multiple inner electrode slots are arranged in a ring array centered on the central axis of the inner electrode tube.

4. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 1, characterized in that, Guide tubes are provided at both ends of the sleeve; The guide tube is inserted into the gauge tube base, and the gauge tube base is used to fix the insulating connecting tube. The insulating connecting tube passes through the gauge base.

5. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 1, characterized in that, It also includes feed bottles and peristaltic pumps; The other port of the three-way valve is connected to the inlet of the feed bottle, the outlet of the feed bottle is connected to the inlet of the peristaltic pump, and the outlet of the peristaltic pump is connected to the inlet pipe.

6. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 1, characterized in that, Also includes: Reducing compression fitting; The inner electrode tube and the air intake tube are configured to be connected via the variable diameter ferrule connector.

7. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 1, characterized in that, Also includes: Flushing components; The flushing component is configured to connect to the last port of the three-way valve.

8. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 1, characterized in that, The end of the internal electrode tube is provided with a sealing component.

9. The coaxial dielectric barrier discharge plasma activated water reactor according to claim 1, characterized in that, The sleeve is an insulating sleeve.

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