Carbon dioxide decomposition device

Abstract

The invention provides a carbon dioxide decomposition device, and relates to the technical field of carbon dioxide conversion, the carbon dioxide decomposition device comprises a first pipe body, a second pipe body, a spiral pipe and a spiral electrode; the first pipe body, the second pipe body and the spiral pipe are all made of insulating materials. The spiral electrode is arranged along the spiral groove part of the spiral tube, is used for being connected with a high-voltage power supply and serves as a discharge positive electrode; the spiral pipe penetrates through the first pipe body, a spiral cavity is formed between the spiral groove part and the inner wall of the first pipe body, and an air inlet and an air outlet which are communicated with the spiral cavity are formed in the first pipe body; the second pipe body is connected to the first pipe body in a sleeving mode, an annular cavity is formed between the second pipe body and the outer wall of the first pipe body, the annular cavity is used for containing cooling liquid flowing circularly, and the cooling liquid is used as a grounding electrode. The gas flow path is limited by the spiral cavity, and the collision probability of carbon dioxide molecules and electrons in a discharge area is improved by combining the spiral electrode, so that the conversion rate of carbon dioxide is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide conversion, and in particular to a carbon dioxide decomposition device. Background Art

[0002] In recent years, the content of carbon dioxide in the earth's atmosphere has continued to increase, becoming a serious global environmental problem. Although the application of clean energy is becoming more and more widespread, the world's main energy source still comes from traditional fossil fuels, and the environmental and climate problems caused by the resulting carbon dioxide greenhouse gas are becoming more and more serious. Therefore, how to effectively reduce the concentration of carbon dioxide in the atmosphere has become an important issue that needs to be solved in the current environmental protection field.

[0003] Among the many CO2 emission reduction technologies, plasma conversion is widely considered to be a promising method due to its advantages such as high catalytic efficiency and mild reaction conditions. It uses high-energy electrons to collide with CO2 molecules, thereby initiating a series of physical and chemical reactions, and ultimately achieving the decomposition of CO2. However, there are still obvious limitations in the application of plasma conversion to CO2 decomposition, resulting in low CO2 decomposition efficiency. Summary of the invention

[0004] The problem to be solved by the present invention is: how to improve the decomposition efficiency of carbon dioxide.

[0005] The present invention provides a carbon dioxide decomposition device, comprising: a first tube body, a second tube body, a spiral tube and a spiral electrode; the first tube body, the second tube body and the spiral tube are all made of insulating materials;

[0006] The spiral electrode is arranged along the spiral groove of the spiral tube, and the spiral electrode is used to connect to a high-voltage power supply and serve as a discharge positive electrode;

[0007] The spiral tube is inserted into the first tube body, and a spiral cavity is formed between the spiral groove and the inner wall of the first tube body. The first tube body is provided with an air inlet and an air outlet connected with the spiral cavity.

[0008] The second tube body is sleeved on the first tube body and forms an annular cavity with the outer wall of the first tube body. The annular cavity is used to contain circulating cooling liquid, and the cooling liquid is used as a grounding electrode.

[0009] Optionally, a flexible insulating strip is provided along the spiral protrusion of the spiral tube, and the flexible insulating strip is used to fill the gap between the spiral protrusion and the inner wall of the first tube body.

[0010] Optionally, the length of the spiral tube is greater than the length of the second tube body and less than the length of the first tube body; the first coincidence range between the axis of the spiral tube and the axis of the first tube body covers the second coincidence range between the axis of the second tube body and the axis of the first tube body.

[0011] Optionally, the air inlet and the air outlet are arranged in central symmetry with respect to the second tube body, and the inner diameters of the air inlet and the air outlet are greater than the pitch of the spiral tube.

[0012] Optionally, the second tube body is provided with a liquid inlet and a liquid outlet for the coolant to flow in and out.

[0013] Optionally, the carbon dioxide decomposition device further includes a metal rod passing through the spiral tube, one end of the metal rod is electrically connected to the high-voltage power supply, and the other end is electrically connected to the spiral electrode.

[0014] Optionally, the spiral electrode includes a metal tape, one end of the metal tape is pasted along the spiral groove part, and the other end is pasted on the outer surface of the metal rod.

[0015] Optionally, the carbon dioxide decomposition device further includes a first sealing device and a second sealing device; one end of the first tube body is adapted to the first sealing device, and the other end is adapted to the second sealing device.

[0016] Optionally, one end of the first sealing device is provided with a first positioning hole adapted to the outer wall of the exposed end of the metal rod, and the other end is provided with a second positioning hole adapted to the outer wall of the first tube body; the first positioning hole and the second positioning hole are communicated with each other and coaxially arranged; wherein, the exposed end is the end of the metal rod exposed to the first tube body.

[0017] Optionally, the second sealing device includes a stud and a sealing plug adapted to the inner wall of the first tube body; one end of the sealing plug is provided with a first threaded hole, and the end face of the non-exposed end of the metal rod is provided with a second threaded hole, one end of the stud is coaxially matched with the first thread, and the other end is coaxially matched with the second thread; wherein, the non-exposed end is the end of the metal rod located inside the first tube body.

[0018] In the invention, the first pipe body, the second pipe body and the spiral pipe included in the carbon dioxide decomposition device are all made of insulating materials, which ensures the insulation performance of the device, prevents current leakage, and ensures the safety of the electrolysis process. When using this carbon dioxide decomposition device, coolant can be filled in the second pipe body and grounded, and carbon dioxide gas can be introduced into the spiral cavity through the air inlet on the first pipe body. After turning on the high-voltage power supply, discharge can be carried out. Among them, in the carbon dioxide decomposition device provided by the present invention, the spiral pipe provided with the spiral electrode penetrates through the first pipe body, and a spiral cavity is formed between the spiral groove part and the inner wall of the first pipe body. Thus, the coolant in the second pipe body, the spiral electrode and the blocking medium therebetween (i.e., the pipe wall of the first pipe body between the second pipe body and the spiral electrode) can form a spiral dielectric barrier discharge plasma part, and then dielectric barrier discharge can be realized in the spiral cavity. After carbon dioxide enters the spiral cavity from the air inlet and reaches the discharge area, the carbon dioxide gas flow can accurately flow along the spiral discharge area, causing carbon dioxide to crack into a mixed gas such as carbon monoxide and oxygen. Finally, the decomposed mixed gas is transported out of the carbon dioxide decomposition device through the air outlet, greatly increasing the collision probability between carbon dioxide molecules and electrons in the discharge area, and thus increasing the conversion rate of carbon dioxide. On this basis, the circulating coolant in the second pipe body of the present invention can also cool the discharge area, which is beneficial to further increasing the conversion rate of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic cross-sectional structure view of the carbon dioxide decomposition device according to an embodiment of the present invention;

[0020] Figure 2 is Figure 1 a partial structure view at A in

[0021] Figure 3 is a schematic three-dimensional structure view of the carbon dioxide decomposition device according to an embodiment of the present invention;

[0022] Figure 4 is a schematic cross-sectional structure view of the carbon dioxide decomposition device according to another embodiment of the present invention;

[0023] Figure 5 is a schematic cross-sectional structure view of the first sealing device according to an embodiment of the present invention;

[0024] Figure 6 is a schematic cross-sectional structure view of the sealing plug according to an embodiment of the present invention.

[0025] DESCRIPTION OF THE REFERENCE NUMERALS:

[0026] 1 - First tube body; 11 - Air inlet; 12 - Air outlet; 2 - Second tube body; 21 - Liquid inlet; 22 - Liquid outlet; 3 - Spiral tube; 31 - Spiral groove part; 32 - Spiral protrusion part; 4 - Metal rod; 41 - Second threaded hole; 5 - First sealing device; 51 - First positioning hole; 52 - Second positioning hole; 6 - Second sealing device; 61 - Stud; 62 - Sealing plug; 621 - First threaded hole; 622 - Connecting column; 623 - Sealing ring. Detailed implementation mode

[0027] To make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings.

[0028] In the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "set", "install", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present invention can be understood according to specific situations.

[0030] In the description of this specification, the descriptions referring to terms such as "embodiment", "one embodiment" and "one implementation mode" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or implementation mode are included in at least one embodiment or implementation mode of the present invention. In this specification, the schematic expressions of the above - mentioned terms do not necessarily refer to the same embodiment or implementation mode. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or implementation modes.

[0031] The Z-axis in the attached drawings represents the vertical direction, that is, the up-and-down position. The positive direction of the Z-axis represents the upper side, and the negative direction of the Z-axis represents the lower side. The Y-axis in the attached drawings represents the horizontal direction and is specified as the front-and-back position. The positive direction of the Y-axis represents the front side, and the negative direction of the Y-axis represents the back side. The X-axis in the attached drawings represents the left-and-right position. The positive direction of the X-axis represents the right side, and the negative direction of the X-axis represents the left side. It should be noted that the above-mentioned meanings represented by the Z-axis, Y-axis, and X-axis are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated devices or elements must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0032] As Figures 1 to 3 shown, the carbon dioxide decomposition device of the embodiment of the present invention includes: a first tube body 1, a second tube body 2, a spiral tube 3, and a spiral electrode. The first tube body 1, the second tube body 2, and the spiral tube 3 are all made of insulating materials.

[0033] The spiral electrode is arranged along the spiral groove part 31 of the spiral tube 3. The spiral electrode is used to connect to a high-voltage power supply and serves as the discharge positive electrode.

[0034] The spiral tube 3 passes through the first tube body 1, and a spiral cavity is formed between the spiral groove part 31 and the inner wall of the first tube body 1. An air inlet 11 and an air outlet 12 communicating with the spiral cavity are arranged on the first tube body 1.

[0035] The second tube body 2 is sleeved on the first tube body 1 and forms an annular cavity between the second tube body 2 and the outer wall of the first tube body 1. The annular cavity is used to accommodate the circulating coolant, and the coolant is used as the grounding electrode.

[0036] Specifically, in this embodiment, the first tube body 1, the second tube body 2, and the spiral tube 3 are all made of insulating materials. For example, the first tube body 1 and the second tube body 2 can be quartz glass tubes, and the spiral tube 3 can be a ceramic tube. In this embodiment, the spiral electrode (not shown in the figure) is arranged along the spiral groove part 31 of the spiral tube 3 (wherein, the spiral groove part 31 is located on the outer wall of the spiral tube 3) and is connected to a high-voltage power supply as the discharge positive electrode. The spiral tube 3 provided with the spiral electrode passes through the first tube body 1, and a spiral cavity is formed between the spiral groove part 31 and the inner wall of the first tube body 1. When actually decomposing carbon dioxide, the spiral cavity is used to accommodate the spiral electrode and carbon dioxide. An air inlet 11 and an air outlet 12 communicating with the spiral cavity are arranged on the first tube body 1. Among them, the air inlet 11 can transport carbon dioxide gas into the spiral cavity, and the air outlet 12 can output the mixed gas after electrolyzing carbon dioxide. The second tube body 2 is sleeved on the first tube body 1 and forms an annular cavity for accommodating the coolant between the second tube body 2 and the outer wall of the first tube body 1. At the same time, the coolant is used as the grounding electrode when electrolyzing carbon dioxide.

[0037] In this embodiment, in combination with the attachedFigures 1 to 3 As shown, the first tube body 1, the second tube body 2, and the spiral tube 3 included in the carbon dioxide decomposition device are all made of insulating materials, ensuring the insulation performance of the device, preventing current leakage, and ensuring the safety of the electrolysis process. When using this carbon dioxide decomposition device, coolant can be filled in the second tube body 2 and grounded, and carbon dioxide gas can be introduced into the spiral cavity through the air inlet 11 on the first tube body 1. After turning on the high-voltage power supply, discharge can be carried out. Among them, the spiral tube 3 provided with a spiral electrode penetrates through the first tube body 1, and a spiral cavity is formed between the spiral groove part 31 and the inner wall of the first tube body 1. Thus, the coolant in the second tube body 2, the spiral electrode, and the blocking medium therebetween (i.e., the tube wall of the first tube body 1 between the second tube body 2 and the spiral electrode) can form a spiral dielectric barrier discharge plasma part, and then dielectric barrier discharge can be realized in the spiral cavity (dielectric barrier discharge is a non-equilibrium gas discharge in which an insulating medium is inserted into the discharge space, also known as dielectric barrier corona discharge or silent discharge). After carbon dioxide enters the spiral cavity from the air inlet 11 and reaches the discharge area, the carbon dioxide gas flow can accurately flow along the spiral discharge area, causing carbon dioxide to crack into a mixed gas such as carbon monoxide and oxygen. Finally, the decomposed mixed gas is transported out of the carbon dioxide decomposition device through the air outlet 12, greatly increasing the collision probability between carbon dioxide molecules and electrons in the discharge area, and thus increasing the conversion rate of carbon dioxide. On this basis, the circulating coolant in the second tube body 2 in this embodiment can also cool the discharge area, which is beneficial to further increasing the conversion rate of carbon dioxide.

[0038] During the above working process, the coolant can be a sodium chloride solution with a certain concentration, which is beneficial to increasing the conductivity of the coolant. After decomposing carbon dioxide, the gas at the air outlet 12 can be collected and introduced into a chromatograph to detect the gas components and the conversion rate of carbon dioxide.

[0039] Optionally, a flexible insulating strip is provided along the spiral protrusion part 32 of the spiral tube 3, and the flexible insulating strip is used to fill the gap between the spiral protrusion part 32 and the inner wall of the first tube body 1.

[0040] Specifically, in combination with the attached Figures 1 to 2 ​, in this embodiment, a flexible insulating strip (not shown in the figure) is provided along the spiral protrusion 32 of the spiral tube 3. The diameter corresponding to the spiral protrusion 32 of the spiral tube 3 can be slightly smaller than the inner diameter of the first tube body 1 (such as a difference of 1 mm). The flexible insulating strip can be a silica gel strip, a rubber strip, or other materials with good insulating properties and flexibility. For example, the diameter corresponding to the spiral protrusion 32 can be 21 mm, the inner diameter of the first tube body 1 can be 22 mm, the cross-sectional shape of the flexible insulating strip can be circular, rectangular, or other shapes adapted to the spiral protrusion 32, and its thickness and number of layers can be determined based on the gap between the spiral protrusion 32 and the inner diameter of the first tube body 1. For example, the thickness of the flexible insulating strip can be 0.3 mm to 0.6 mm, and a flexible insulating strip with a thickness of 0.3 mm can be selected and wound around the spiral protrusion 32 for two layers to ensure the filling effect.

[0041] In this embodiment, the flexible insulating strip is arranged along the spiral protrusion 32 of the spiral tube 3. On the one hand, it can fill the gap between the spiral protrusion 32 and the inner wall of the first tube body 1 to ensure that the carbon dioxide gas flow can accurately flow along the spiral cavity after entering from the air inlet 11. On the other hand, the flexible insulating strip is arranged along the spiral protrusion 32 of the spiral tube 3, that is, the flexible insulating strip does not occupy the space of the spiral groove part 31, which is beneficial to avoiding occupying the space of the spiral cavity and avoiding affecting the carbon dioxide decomposition efficiency.

[0042] Optionally, the length of the spiral tube 3 is greater than the length of the second tube body 2 and less than the length of the first tube body 1; the first coincidence range between the axis of the spiral tube 3 and the axis of the first tube body 1 covers the second coincidence range between the axis of the second tube body 2 and the axis of the first tube body 1.

[0043] Specifically, in combination with the attached Figures 1 to 2, in this embodiment, the spiral tube 3 is inserted into the first tube body 1 and is located in the inner wall space of the first tube body 1. The second tube body 2 is sleeved on the first tube body 1 and is located in the outer wall space of the first tube body 1. Since the coolant in the second tube body 2, the spiral electrode arranged along the spiral groove portion 31 of the spiral tube 3, and at least part of the tube wall of the first tube body 1 between the two can form a plasma part of the spiral dielectric barrier discharge. And in this embodiment, the length of the spiral tube 3 is greater than the length of the second tube body 2 and less than the length of the first tube body 1. Therefore, the maximum discharge region corresponds to the region where the second tube body 2 with the shortest length is located. It can be seen that in this embodiment, the size of the discharge region where the spiral cavity of the carbon dioxide decomposition device is located depends on the overlapping length of the first tube body 1, the second tube body 2, and the spiral tube 3 along the axial direction of the first tube body 1 (i.e., the illustrated Z-axis direction). And the first overlapping range between the axis of the spiral tube 3 and the axis of the first tube body 1 in this embodiment covers the second overlapping range between the axis of the second tube body 2 and the axis of the first tube body 1, which is equivalent to defining the installation position relationship among the first tube body 1, the second tube body 2, and the spiral tube 3, that is, the first overlapping range between the spiral tube 3 and the first tube body 1 in the axial direction (i.e., the Z-axis direction) after they are matched can cover the second overlapping range in the axial direction between the second tube body 2 and the first tube body 1 after they are matched, and further can make the position where the spiral cavity is located cover the entire length of the second tube body 2. Thus, under the limited structural dimensions of each component of the carbon dioxide decomposition device, the utilization rate of the discharge region is greatly improved, and the carbon dioxide decomposition efficiency is further improved.

[0044] In this embodiment, the length of the spiral tube 3 is greater than the length of the second tube body 2 and less than the length of the first tube body 1. For example, assume that the total length of the first tube body 1 is 200 mm, the total length of the second tube body 2 is 100 mm, and the total length of the spiral tube 3 is 150 mm. The second tube body 2 is sleeved on the first tube body 1. Along the positive Z-axis and the negative Z-axis, the distance between the end face of the first tube body 1 and the end face of the second tube body 2 is 50 mm, that is, in the axial direction of the first tube body 1, the central position of the second tube body 2 coincides with the central position of the first tube body 1. On this basis, the spiral tube 3 is inserted into the first tube body 1, and both ends of the spiral tube 3 are located inside the first tube body 1. Along the positive Z-axis, the distance between one end of the spiral tube 3 and one end of the first tube body 1 is 10 mm. Correspondingly, along the negative Z-axis, the distance between one end of the spiral tube 3 and one end of the first tube body 1 is 40 mm. In this way, in this embodiment, the length of the spiral tube 3 is greater than the length of the second tube body 2 and less than the length of the first tube body 1. On the basis of ensuring that the position where the spiral cavity is located covers the entire length of the second tube body 2, it is also beneficial to accommodate the installation position error of the spiral tube 3.

[0045] Optionally, the air inlet 11 and the air outlet 12 are arranged in central symmetry with respect to the second tube body 2, and the inner diameters of the air inlet 11 and the air outlet 12 are greater than the pitch of the spiral tube 3.

[0046] In this embodiment, with reference to the attached Figures 1 to 3 , the air inlet 11 and the air outlet 12 are respectively connected to the spiral cavity. The second pipe body 2 is located between the air inlet 11 and the air outlet 12. The air inlet 11 and the air outlet 12 are arranged centrosymmetrically with respect to the second pipe body 2, that is, the air inlet 11 is located at a position on the first pipe body 1 close to one end of the second pipe body 2, and the air outlet 12 is located at a position on the first pipe body 1 close to the other end of the second pipe body 2. This is beneficial to increasing the gas path length of carbon dioxide gas in the device, enabling the carbon dioxide gas path to cover the entire discharge area. While further improving the carbon dioxide decomposition efficiency, it is also beneficial to prevent a large amount of undecomposed carbon dioxide from being discharged from the air outlet 12. At the same time, in this embodiment, the inner diameters of the air inlet 11 and the air outlet 12 are larger than the pitch of the spiral pipe 3. For example, the pitch of the spiral pipe 3 is 2 mm, and the inner diameters of the air inlet 11 and the air outlet 12 are 6 mm. In this way, even if the overlapping area between the axis of the spiral pipe 3 and the axis of the first pipe body 1 covers the air inlet 11 and / or the air outlet 12, since the pitch of the spiral pipe 3 is smaller than the inner diameters of the air inlet 11 and the air outlet 12, the air inlet 11 and the air outlet 12 can communicate with at least part of the spiral groove part 31, thereby realizing communication with the spiral cavity, which is beneficial to reducing the assembly difficulty of the device and accommodating spiral pipes 3 of different lengths.

[0047] Optionally, the second pipe body 2 is provided with a liquid inlet 21 and a liquid outlet 22 for the coolant to enter and exit.

[0048] In this embodiment, with reference to the attached Figures 1 to 3 , the second pipe body 2 is provided with a liquid inlet 21 and a liquid outlet 22. The liquid inlet 21 and the liquid outlet 22 can be arranged centrosymmetrically with respect to the second pipe body 2. Among them, the liquid inlet 21 can be located at the lower part (i.e., the negative Z-axis direction in Figure 1 ), and the liquid outlet 22 can be located at the upper part (i.e., the positive Z-axis direction in Figure 1 ). During actual use, the outlet pipe of the water cooler can be sleeved on the liquid inlet 21, and the inlet pipe of the water cooler can be sleeved on the liquid outlet 22. The coolant enters the annular cavity of the second pipe body 2 from the liquid inlet 21 and can evenly fill the entire annular cavity, avoiding the formation of air cavities, and thus ensuring the cooling effect.

[0049] Optionally, the carbon dioxide decomposition device further includes a metal rod 4 passing through the spiral pipe 3. One end of the metal rod 4 is electrically connected to the high-voltage power supply, and the other end is electrically connected to the spiral electrode.

[0050] In this embodiment, with reference to the attached Figures 1 to 4, the carbon dioxide decomposition device further includes a metal rod 4 passing through the spiral tube 3. The metal rod 4 can be made of metal materials with good electrical conductivity such as copper and nickel, and its diameter is less than or equal to the inner diameter of the spiral tube 3. For example, the diameter of the metal rod 4 can be 9 mm and the length can be 250 mm. The inner diameter of the spiral tube 3 can be 9 mm and the length can be 150 mm. When assembling the carbon dioxide decomposition device, the metal rod 4 can be passed through the spiral tube 3, and an interference fit can be adopted between the two to ensure the reliability of the fit. Both ends of the metal rod 4 are exposed at both ends of the spiral tube 3, and the spiral electrode is in direct contact with the metal rod 4 exposed at the spiral tube 3 (such as using a metal ring to fix the spiral electrode on the outer wall of the metal rod 4). On this basis, the spiral tube 3 with the metal rod 4 inserted can be inserted into the first tube body 1, and one end of the metal rod 4 is exposed at one end of the first tube body 1, which is convenient for connecting the high-voltage power supply. The spiral electrode is connected to the high-voltage power supply through the metal rod 4, which is beneficial to improving the stability of discharge.

[0051] Optionally, the spiral electrode includes a metal tape, one end of the metal tape is pasted along the spiral groove part 31, and the other end is pasted on the outer surface of the metal rod 4.

[0052] In this embodiment, in combination with the attached Figures 1 to 4 , the spiral electrode can adopt a metal tape (such as a copper foil tape with good electrical conductivity). Further, the width of the metal tape can be adapted to the groove width of the spiral groove part 31, and the thickness of the metal tape needs to be less than the depth of the spiral groove part 31. For example, the width of the metal tape can be selected as 2 mm, the thickness can be selected as 0.1 mm, and the depth and groove width of the spiral groove part 31 can both be 2 mm. After the metal tape is wound and pasted along the spiral groove part 31, it will not occupy too much space in the spiral groove, so that the spiral cavity can accommodate more carbon dioxide gas, further improving the decomposition efficiency.

[0053] In this embodiment, the length of the metal tape can be greater than the total length of the spiral groove part 31. In actual use, one end of the metal tape can be wound and pasted along the spiral groove part 31 to form a spiral electrode. One end of the remaining part can be directly pasted on the outer surface of the metal rod 4, and without adding other fixing devices, the electrical connection between the spiral electrode and the metal rod 4 can be realized. While simplifying the device structure, it is also beneficial to further improve the discharge stability and uniformity.

[0054] Optionally, the carbon dioxide decomposition device further includes a first sealing device 5 and a second sealing device 6; one end of the first tube body 1 is adapted to the first sealing device 5, and the other end is adapted to the second sealing device 6.

[0055] In this embodiment, in combination with the attached Figure 4, the carbon dioxide decomposition device further includes a first sealing device 5 and a second sealing device 6, both of which can be made of rubber sealing rings or other suitable sealing materials to ensure close fitting with both ends of the first pipe body 1 and prevent gas leakage. In this embodiment, one end of the first pipe body 1 is adapted to the first sealing device 5, and the other end is adapted to the second sealing device 6, effectively solving the sealing problem of the carbon dioxide decomposition device, enabling the carbon dioxide gas entering from the air inlet 11 to flow accurately along the spiral cavity, being decomposed at the discharge part, and then discharged from the air outlet 12. While avoiding waste of carbon dioxide gas, it can also effectively collect the decomposed mixed gas, thereby ensuring the high efficiency and safety of carbon dioxide decomposition.

[0056] Optionally, one end of the first sealing device 5 is provided with a first positioning hole 51 adapted to the outer wall of the exposed end of the metal rod 4, and the other end is provided with a second positioning hole 52 adapted to the outer wall of the first pipe body 1; the first positioning hole 51 and the second positioning hole 52 are interconnected and coaxially arranged; wherein, the exposed end is the end of the metal rod 4 exposed to the first pipe body 1.

[0057] In this embodiment, in combination with the attached Figures 4 to 5 , one end of the metal rod 4 is exposed to one end of the first pipe body 1, and it can be used as the exposed end. One end of the first sealing device 5 is provided with a first positioning hole 51 adapted to the outer wall of the exposed end of the metal rod 4, and the other end is provided with a second positioning hole 52 adapted to the outer wall of the first pipe body 1. The first positioning hole 51 and the second positioning hole 52 are interconnected and coaxially arranged. For example, the outer wall diameter of the metal rod 4 is 9 mm, and the outer wall diameter of the first pipe body 1 is 25 mm. Then the diameter of the first positioning hole 51 of the first sealing device 5 can be 9 mm, and the diameter of the second positioning hole 52 can be 25 mm. The exposed end of the metal rod 4 can be inserted into the first positioning hole 51 of the first sealing device 5, and an interference fit can be adopted between the two. On this basis, the outer wall of the first pipe body 1 can be inserted into the second positioning hole 52, and an interference fit or an interference fit can be adopted between the two. Since the first positioning hole 51 and the second positioning hole 52 are interconnected and coaxially arranged. When the first positioning hole 51 cooperates with the metal rod 4 and the second positioning hole 52 cooperates with the first pipe body 1, the first sealing device 5 can seal the end of the metal rod 4 exposed to the first pipe body 1 and ensure that the metal rod 4 and the first pipe body 1 can be coaxially arranged, which is beneficial to improving the uniformity and stability of discharge.

[0058] Optionally, the second sealing device 6 includes a stud 61 and a sealing plug 62 adapted to the inner wall of the first pipe body 1; one end of the sealing plug 62 is provided with a first threaded hole 621, and the end face of the non-exposed end of the metal rod 4 is provided with a second threaded hole 41. One end of the stud 61 is coaxially mated with the first thread, and the other end is coaxially mated with the second thread; wherein, the non-exposed end is the end of the metal rod 4 located inside the first pipe body 1.

[0059] In this embodiment, with reference to the attached Figure 4 , the second sealing device 6 includes a stud 61 and a sealing plug 62 adapted to the inner wall of the first pipe body 1. Assuming that the inner diameter of the first pipe body 1 is 22 mm, the maximum outer diameter of the sealing plug 62 can also be 22 mm. Among them, the sealing plug 62 can be made of a high-temperature resistant insulating material (such as polytetrafluoroethylene). The other end of the metal rod 4 is located inside the first pipe body 1, which can be regarded as a non-exposed end. A second threaded hole 41 is provided on the end face of the non-exposed end. One end of the stud 61 is coaxially fitted with the first thread, and the other end is coaxially fitted with the second thread. On the basis of sealing the other end of the first pipe body 1, the coaxial fixation of the metal rod 4 and the sealing plug 62 can be realized, thereby ensuring that the metal rod 4, the spiral tube 3, and the first pipe body 1 are coaxially arranged with each other, and comprehensively ensuring the uniformity and stability of the discharge.

[0060] Furthermore, with reference to the attached Figures 4 to 6 , the sealing plug 62 includes a connecting column 622 and a sealing ring 623. The sealing ring 623 is sleeved on the connecting column 622. The first threaded hole 621 is located at one end of the connecting column 622. The outer wall of the sealing ring 623 is adapted to the inner wall of the first pipe body 1. For example, the outer diameter of the connecting column 622 is 18 mm, the inner diameter of the first pipe body 1 is 22 mm, the inner diameter of the sealing ring 623 can be 18 mm, and the outer diameter can be 22 mm. When assembling the carbon dioxide decomposition device, the end of the stud 61 can be first fitted with the first threaded hole 621 on the connecting column 622, and then the other end of the stud 61 can be fitted with the second threaded hole 41 of the metal rod 4. On this basis, the sealing ring 623 can be embedded in the annular gap between the connecting column 622 and the inner wall of the first pipe body 1. On the basis of achieving effective sealing, it is also beneficial to reduce the assembly difficulty. Among them, the sealing ring 623 can be made of a flexible material such as a silicone ring, and the connecting column 622 can be made of a high-temperature resistant insulating material, which can avoid melting the sealing ring 623 due to the high temperature generated during the discharge while ensuring the sealing effect.

[0061] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0062] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A carbon dioxide decomposition device, characterized in that: include: A first tube body (1), a second tube body (2), a spiral tube (3) and a spiral electrode; the first tube body (1), the second tube body (2) and the spiral tube (3) are all made of insulating materials; The spiral electrode is arranged along the spiral groove portion (31) of the spiral tube (3), and the spiral electrode is used to connect to a high-voltage power supply and serve as a discharge positive electrode; The spiral tube (3) is inserted into the first tube body (1), and a spiral cavity is formed between the spiral groove portion (31) and the inner wall of the first tube body (1), and the first tube body (1) is provided with an air inlet (11) and an air outlet (12) which are connected to the spiral cavity; The second tube body (2) is sleeved on the first tube body (1) and forms an annular cavity with the outer wall of the first tube body (1), wherein the annular cavity is used to contain circulating cooling liquid, and the cooling liquid is used as a grounding electrode.

2. The carbon dioxide decomposition device according to claim 1, characterized in that: A flexible insulating strip is provided along the spiral protrusion portion (32) of the spiral tube (3), and the flexible insulating strip is used to fill the gap between the spiral protrusion portion (32) and the inner wall of the first tube body (1).

3. The carbon dioxide decomposition device according to claim 1, characterized in that: The length of the spiral tube (3) is greater than the length of the second tube body (2) and less than the length of the first tube body (1); a first overlapping range between the axis of the spiral tube (3) and the axis of the first tube body (1) covers a second overlapping range between the axis of the second tube body (2) and the axis of the first tube body (1).

4. The carbon dioxide decomposition device according to claim 1, characterized in that: The air inlet (11) and the air outlet (12) are arranged centrally and symmetrically with respect to the second tube body (2), and the inner diameters of the air inlet (11) and the air outlet (12) are greater than the pitch of the spiral tube (3).

5. The carbon dioxide decomposition device according to claim 1, characterized in that: The second tube body (2) is provided with a liquid inlet (21) and a liquid outlet (22) for the coolant to enter and exit.

6. The carbon dioxide decomposition device according to claim 1, characterized in that: The carbon dioxide decomposition device further comprises a metal rod (4) passing through the spiral tube (3); one end of the metal rod (4) is electrically connected to the high voltage power supply, and the other end is electrically connected to the spiral electrode.

7. The carbon dioxide decomposition device according to claim 6, characterized in that: The spiral electrode comprises a metal tape, one end of which is adhered along the spiral groove portion (31), and the other end of which is adhered to the outer surface of the metal rod (4).

8. The carbon dioxide decomposition device according to claim 6, characterized in that: The carbon dioxide decomposition device further comprises a first sealing device (5) and a second sealing device (6); one end of the first tube body (1) is matched with the first sealing device (5), and the other end is matched with the second sealing device (6).

9. The carbon dioxide decomposition device according to claim 8, characterized in that: One end of the first sealing device (5) is provided with a first positioning hole (51) adapted to the outer wall of the exposed end of the metal rod (4), and the other end is provided with a second positioning hole (52) adapted to the outer wall of the first tube body (1); the first positioning hole (51) and the second positioning hole (52) are interconnected and coaxially arranged; wherein the exposed end is the end of the metal rod (4) exposed to the first tube body (1).

10. The carbon dioxide decomposition device according to claim 8, characterized in that: The second sealing device (6) comprises a stud bolt (61) and a sealing plug (62) adapted to the inner wall of the first tube body (1); a first threaded hole (621) is provided at one end of the sealing plug (62), a second threaded hole (41) is provided on the end surface of the non-exposed end of the metal rod (4), one end of the stud bolt (61) is coaxially matched with the first thread, and the other end is coaxially matched with the second thread; wherein the non-exposed end is the end of the metal rod (4) located inside the first tube body (1).

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