Rotary suspension double-cylinder plasma catalytic reactor

Abstract

The invention discloses a rotary suspension double-cylinder plasma catalytic reactor, and relates to the technical field of catalytic reaction equipment, the rotary suspension double-cylinder plasma catalytic reactor comprises a combined cylinder and a plasma generating device, and the plasma generating device is mounted on the combined cylinder; the combined sleeve comprises an outer sleeve body and an inner sleeve body, the inner sleeve body is rotationally connected into the outer sleeve body, a catalyst storage cavity is formed in the inner sleeve body, a catalyst is placed in the catalyst storage cavity, a plurality of fan blades are further fixed in the inner sleeve body, the fan blades are located below the catalyst storage cavity, and an air inlet cavity is fixed to the bottom of the outer sleeve body. The air inlet cavity is communicated with the bottom of the inner cylinder, the air inlet cavity is connected with a plurality of air inlet pipes, a space between the outer cylinder and the inner cylinder is a gas flowing cavity, an upper opening of the inner cylinder is communicated with the gas flowing cavity, and the outer cylinder is connected with a plurality of air outlet pipes; and the plasma generating device is used for discharging in the combined sleeve. The heat distribution is uniform.

Description

Technical Field

[0001] The invention relates to the technical field of catalytic reaction equipment, in particular to a rotating suspended double-tube plasma catalytic reactor. Background Art

[0002] Against the backdrop of increasingly severe global energy and environmental issues, the vicious cycle of CO2 emissions and fossil fuel dependence has become the core of the climate crisis. In addition to CO2, nitrogen oxides (NO X ) and malodorous gases (such as hydrogen sulfide, volatile organic compounds, etc.) also increase the environmental burden, NO X It is the primary cause of photochemical smog and acid rain. Malodorous gases not only harm human health, but some of their components (such as methane) also have a strong greenhouse effect. Traditional treatment technologies face multiple challenges: thermal catalytic CO2 conversion requires high temperatures and pressures, resulting in high energy consumption and equipment costs; selective catalytic reduction (SCR) denitrification technology relies on operating temperatures above 200°C, making it difficult to adapt to distributed emission scenarios; and odor treatment methods such as biofilters are inefficient and pose a risk of secondary pollution. These fragmented technical approaches further increase the cost of comprehensive treatment.

[0003] The breakthrough of low-temperature plasma technology provides a new paradigm for the coordinated treatment of multiple pollutants. This technology can activate CO2 and crack NO at the same time under normal temperature and pressure by exciting gas molecules with high-energy electrons. X Chemical bonds and mineralization of odor components. For example, in the CO2 hydrogenation reaction, plasma and catalyst synergistically can increase the methane selectivity from 30% of traditional thermal catalysis to 85%, while reducing the reaction temperature from 400℃ to below 150℃. X , plasma can oxidize NO into easy-to-treat NO2 within milliseconds, with a denitrification efficiency of over 90% and no need to preheat the flue gas.

[0004] However, existing plasma catalytic reactions still suffer from uneven heat distribution, which leads to heat concentration. Over time, this reduces the service life of the equipment and affects reaction efficiency.

[0005] Therefore, there is an urgent need in the art for a rotating suspended double-tube plasma catalytic reactor to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a rotating suspended double-tube plasma catalytic reactor to solve the problems existing in the above-mentioned prior art and to distribute heat evenly.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention discloses a rotating suspended double-cylinder plasma catalytic reactor, comprising a combined cylinder and a plasma generating device, wherein the plasma generating device is installed on the combined cylinder;

[0009] The combined sleeve comprises an outer cylinder and an inner cylinder, the inner cylinder being rotatably connected to the interior of the outer cylinder, a catalyst storage chamber being provided in the inner cylinder, the catalyst storage chamber being used to place catalyst, a plurality of fan blades being fixed in the inner cylinder, the fan blades being located below the catalyst storage chamber, an air inlet chamber being fixed at the bottom of the outer cylinder, the air inlet chamber being communicated with the bottom of the inner cylinder, the air inlet chamber being connected to a plurality of air inlet pipes, the reaction gas blown in from the air inlet pipes can drive the fan blades and the inner cylinder to rotate, the space between the outer cylinder and the inner cylinder being a gas flow chamber, the upper opening of the inner cylinder being communicated with the gas flow chamber, the outer cylinder being connected to a plurality of air outlet pipes, and the gas in the gas flow chamber can flow out from the air outlet pipes;

[0010] The plasma generating device is used for discharging in the combined sleeve.

[0011] Preferably, the outer cylinder and the inner cylinder are both cylindrical structures, the outer diameter of the outer cylinder is 30 mm, and the outer diameter of the inner cylinder is 20 mm;

[0012] The central axis of the outer cylinder and the central axis of the inner cylinder are coaxially arranged.

[0013] Preferably, a rotation mounting hole is provided at the bottom of the outer cylinder, a rotation bearing is installed at the rotation mounting hole, the outer ring of the rotation bearing is fixed at the rotation mounting hole, and the outer wall of the inner cylinder is fixedly connected to the inner ring of the rotation bearing.

[0014] Preferably, an upper filter screen is fixed above the catalyst storage chamber, and a lower filter screen is fixed below the catalyst storage chamber.

[0015] Preferably, a plurality of upper spring latches and a plurality of lower spring latches are fixed on the inner wall of the inner cylinder, the upper spring latches are located above the lower spring latches, the upper spring latches are used to fix the upper filter screen, and the lower spring latches are used to fix the lower filter screen.

[0016] Preferably, the plasma generating device includes a high-voltage electrode, a metal component and a grounding electrode, one end of the high-voltage electrode extends into the interior of the inner cylinder, the other end of the high-voltage electrode is connected to a power supply, the metal component is fixed to the outside of the outer cylinder, and the metal component is connected to the grounding electrode.

[0017] Preferably, a fixed installation hole is provided at the center of the upper end of the outer cylinder, a barrel plug is installed at the fixed installation hole, and the high-voltage electrode is installed on the barrel plug.

[0018] Preferably, the high voltage electrode is a spiral structure.

[0019] Preferably, the high-voltage electrode is a metal spiral rod, the metal component is an iron wire, and the grounding electrode is a metal rod.

[0020] Preferably, a plurality of fan blade slots are provided on the inner wall of the inner cylinder, the outer edges of the fan blades are inserted into the fan blade slots, and a sealing strip is provided at the gap between the outer edges of the fan blades and the fan blade slots.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The present invention uses a plasma generator as the reaction condition for the catalytic reaction, eliminating the need for an additional heat source. This allows the entire reaction process to be kept at a relatively low temperature, typically between 100 and 300°C. Furthermore, the inner cylinder rotates during the reaction, allowing the catalyst and reaction gases inside to mix more evenly, thereby improving reaction efficiency and distributing heat more evenly, thus avoiding problems such as heat concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a front view of the rotating suspended double-tube plasma catalytic reactor of Example 1;

[0025] Figure 2 This is a cross-sectional view of a rotating suspended double-tube plasma catalytic reactor according to Example 1;

[0026] In the figure: 1-cylinder plug; 2-outer cylinder; 3-inner cylinder; 4-lower filter; 5-exhaust pipe; 6-inlet pipe; 7-ground electrode; 8-high-voltage electrode; 9-metal parts; 10-upper filter; 11-fan blades. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a rotating suspended double-tube plasma catalytic reactor to solve the problems existing in the above-mentioned prior art and to distribute heat evenly.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1-Figure 2 As shown, this embodiment provides a rotating suspended double-cylinder plasma catalytic reactor, which includes a combined cylinder and a plasma generating device, and the plasma generating device is installed on the combined sleeve.

[0032] For the specific structure of the combined sleeve Figure 1 As shown, the combined sleeve includes an outer cylinder 2 and an inner cylinder 3, the inner cylinder 3 is rotatably connected to the inside of the outer cylinder 2, and a catalyst storage chamber is provided in the inner cylinder 3. The catalyst storage chamber is used to place the catalyst required for the reaction. In the face of different catalytic reactions, the required catalyst will also be different, and the reaction gas can pass through the catalyst storage chamber from bottom to top. A plurality of fan blades 11 are also fixed in the inner cylinder 3, and the outer edges of all fan blades 11 are fixed to the inner wall of the inner cylinder 3. The inner edges of each fan blade 11 are fixed to each other (i.e., fixed in one body), and the fan blades 11 are tilted and fixed, i.e., there is an angle with the horizontal plane or vertical plane. The fan blades 11 are located below the catalyst storage chamber, and the bottom of the outer cylinder 2 is fixed with an air inlet chamber, which is connected to the bottom of the inner cylinder 3. The air inlet chamber is connected to a plurality of air inlet pipes 6, which are connected to an air source through a pipeline. The air source can be a gas tank for storing reaction gas. The reaction gas blown in from the air inlet pipe 6 can drive the fan blades 11 and the inner cylinder 3 to rotate. The space between the outer cylinder 2 and the inner cylinder 3 forms a gas flow cavity. The upper opening of the inner cylinder 3 communicates with the gas flow cavity. Several outlet pipes 5 are connected to the outer cylinder 2, typically only one. Gas within the gas flow cavity can flow out through these outlet pipes 5, which can be connected to a product gas collection container via a pipeline to collect the generated gas. Both the inlet pipe 6 and the outlet pipe 5 have an outer diameter of 6 mm and an inner diameter of 4 mm. Of course, those skilled in the art can adjust the specific dimensions of the inlet pipe 6 and outlet pipe 5 according to actual needs, and are not limited to this specific size.

[0033] The plasma generator is used to ionize the gas in the combined sleeve to generate plasma and discharge, so as to make the reaction gas undergo catalytic reaction in the catalyst and discharge environment.

[0034] In actual use, the plasma generator is started, and the reaction gas is filled into the bottom of the inner cylinder 3 through the air inlet pipe 6. The reaction gas flows from bottom to top inside the inner cylinder 3. When it passes through the tilted fan blades 11, it will give the fan blades 11 a driving force, causing the fan blades 11 to rotate. Since the fan blades 11 are fixedly connected to the inner cylinder 3, the fan blades 11 and the inner cylinder 3 rotate together in the outer cylinder 2. When the reaction gas passes through the catalyst storage chamber, the catalyst is suspended under the blowing of the reaction gas. The reaction gas will contact the catalyst inside it and, under the discharge action of the plasma generator, a catalytic reaction will be carried out. The temperature of the whole process is relatively low, generally around 100-300°C. The ambient temperature of different catalytic reactions will also be different. At the same time, the rotating inner cylinder 3 can fully mix the catalyst and reaction gas inside it, thereby improving the reaction efficiency, and the heat distribution inside it is also more uniform, avoiding heat concentration. The generated gas will flow out from the upper end opening of the inner cylinder 3 and flow into the gas flow cavity, and finally flow out from the gas outlet pipe 5.

[0035] In this embodiment, both the outer cylinder 2 and the inner cylinder 3 are cylindrical structures. The outer cylinder 2 has an outer diameter of 30 mm, and the inner cylinder 3 has an outer diameter of 20 mm. The outer cylinder 2 is taller than the inner cylinder 3, and the bottoms of the inner cylinder 3 and the outer cylinder 2 are flush. The upper end of the inner cylinder 3 is open at both ends, and a gap is formed between the upper ends of the inner cylinder 3 and the upper ends of the outer cylinder 2 to allow the generated gas to flow out.

[0036] Figure 1 The vertical center axis of the outer cylinder 2 and the vertical center axis of the inner cylinder 3 are coaxially arranged.

[0037] In this embodiment, the bottom of the outer cylinder 2 is provided with a rotational mounting hole, into which a rotary bearing is mounted. Specifically, the outer ring of the rotary bearing is fixed to the rotational mounting hole, and the outer wall of the inner cylinder 3 is fixedly connected to the inner ring of the rotary bearing. In other words, the inner cylinder 3 is connected to the outer cylinder 2 via the rotary bearing, thereby enabling relative rotation between the outer cylinder 2 and the inner cylinder 3.

[0038] In this embodiment, an upper filter screen 10 is fixed above the catalyst storage chamber, and a lower filter screen 4 is fixed below the catalyst storage chamber. The upper filter screen 10 and the lower filter screen 4 constitute part of the catalyst storage chamber. Furthermore, the upper filter screen 10 and the lower filter screen 4 form the upper and lower surfaces of the catalyst storage chamber. The pores of the upper filter screen 10 and the lower filter screen 4 should have a smaller diameter than the diameter of the catalyst to prevent the catalyst from passing through the pores, thereby limiting the catalyst's position.

[0039] The upper filter 10 and lower filter 4 are metal filters. While ensuring gas flow, they also physically block the catalyst, regulate airflow, and enhance plasma discharge efficiency by optimizing the electric field distribution. They can be made of nickel or titanium alloys, which are highly temperature-resistant. Aluminum oxide coatings are applied to the surfaces to prevent corrosion from the active gases in the plasma discharge.

[0040] In this embodiment, several upper and lower spring latches are fixed to the inner wall of the inner cylinder 3. These are evenly distributed around the inner wall of the inner cylinder 3 via screws, with the upper spring latches positioned above the lower spring latches. Each upper spring latch secures the edge of the upper filter 10, while each lower spring latch secures the edge of the lower filter 4, thereby securing the upper and lower filters 10 and 4.

[0041] In this embodiment, the plasma generating device includes a high voltage electrode 8, a metal component 9 and a ground electrode 7. One end of the high voltage electrode 8 ( Figure 1 The lower end of the high-voltage electrode 8 extends into the interior of the inner cylinder 3. The other end of the high-voltage electrode 8 is connected to a power source, which can be an existing high-voltage DC power source. The metal component 9 is fixed to the outside of the outer cylinder 2 and connected to the ground electrode 7, which is grounded. In actual use, the area covered by the high-voltage electrode 8 and the metal component 9 is the area where plasma is generated and discharged. Dielectric barrier discharge (DBD) generates non-equilibrium plasma for gas-phase chemical reactions of the reactant gases.

[0042] In this embodiment, a fixed mounting hole is provided at the center of the upper end of the outer cylinder 2, and a plug 1 is inserted and installed at the fixed mounting hole. The material of the plug 1 is high-temperature resistant ceramic, specifically silicon nitride. The high-voltage electrode 8 is inserted and installed in the central through hole of the plug 1. The upper end of the high-voltage electrode 8 passes through the plug 1 and is connected to the power supply. One function of providing the plug 1 is to fix the high-voltage electrode 8. Another function is that when it is necessary to add new catalyst to the catalyst storage chamber or pour out the catalyst in the catalyst storage chamber, it is only necessary to open the plug 1 and remove the upper filter 10 to add new catalyst or pour out the old catalyst.

[0043] In this embodiment, the high-voltage electrode 8 has a spiral structure. When the inner cylinder 3 rotates, the high-voltage electrode 8 does not rotate, thereby stirring the catalyst in the catalyst storage chamber and further enhancing the contact efficiency between the catalyst and the reaction gas.

[0044] In addition, an electrode through hole is provided in the center of the upper filter screen 10 for the high voltage electrode 8 to pass through. A gap of 1-2 mm is provided between the lower filter screen 4 and the lower end of the high voltage electrode 8 to prevent the high voltage electrode 8 from affecting the rotation of the inner cylinder 3.

[0045] In this embodiment, high-voltage electrode 8 is a spiral metal rod, specifically a helical iron rod, with a diameter of 6 mm. Metal component 9 is an iron wire. When metal component 9 is an iron wire, it is spirally wound around the outer wall of outer cylinder 2. Alternatively, metal component 9 can be a wire mesh woven from iron wire, which can be directly wrapped around the outer wall of outer cylinder 2. Ground electrode 7 is a metal rod, specifically an iron rod, with a diameter of 3 mm.

[0046] In this embodiment, a number of blade slots are provided on the inner wall of the inner cylinder 3, and the outer edge of the fan blade 11 is inserted into the blade slot. A sealing strip is provided at the gap between the outer edge of the fan blade 11 and the blade slot, which can not only effectively fix the fan blade 11, but also ensure the sealing between the fan blade 11 and the fan slot to prevent impurities from entering.

[0047] The fan blades 11 , the outer cylinder 2 and the inner cylinder 3 are all made of insulating materials, including but not limited to quartz glass.

[0048] Example 2

[0049] This embodiment provides a catalytic reaction method using a rotating suspended double-tube plasma catalytic reactor, comprising the following steps:

[0050] In this specific embodiment, CO2 and H2 are used as raw materials for methanation reaction, and Ni / Ce-Al2O3 catalyst is filled into the catalyst storage chamber (i.e., discharge area). The reaction is carried out at room temperature and excited by plasma discharge. After the mixed reaction gas enters the inner cylinder 3 from the air inlet pipe 6, the mixed gas drives the fan blades 11 to rotate, and the inner cylinder 3 and the fan blades 11 rotate in coordination. Since the mixed gas enters the inner cylinder 3 from the bottom of the device, the airflow causes the Ni / Ce-Al2O3 catalyst to be in a suspended state in the inner cylinder 3, so that the catalyst can be fully mixed with the reaction gas in the inner cylinder 3, allowing plasma to better interact with the catalyst Ni / Ce-Al2O, and the reaction gas can better contact with the plasma and the Ni / Ce-Al2O3 catalyst, thereby increasing the reaction rate. At the same time, the upper filter 10 and the lower filter 4 can also achieve physical isolation and airflow control of the catalyst while ensuring that CO2 and H2 gases pass through. The plasma discharge efficiency can also be enhanced by optimizing the electric field distribution. Secondly, rotating the inner cylinder 3 allows for more efficient methanation heat transfer, as rotation increases fluid turbulence, thereby improving heat exchange efficiency. The rotational motion evens out the fluid flow within the inner cylinder 3, reducing the risk of localized overheating. The design of the rotating inner cylinder 3 also reduces overheating and pressure buildup during the reaction.

[0051] After the mixed gas enters the inner cylinder 3 through the inlet pipe 6 and flows through the discharge area (i.e., the catalyst storage chamber), CO2 and H2 react to form CH4 under the catalytic action of the plasma. The reacted gas then passes through the upper filter 10 and ultimately flows out of the outlet pipe 5. The upper filter 10 and the lower filter 4 are woven from iron wire, forming a localized electric field on their surfaces. This prevents gas breakdown voltage, promotes plasma discharge, and improves methanation efficiency by 30-40%.

[0052] When the reacted gas enters the outer cylinder 2 from the inner cylinder 3, the temperature of the entire device is kept in a relatively stable state. The double-cylinder device not only reduces heat loss, but also avoids uneven heating and cooling due to the large temperature difference between the inside and outside of the reaction area.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0054] In the description of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0055] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0056] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the present invention to express positional relationships or shapes include states or shapes that are approximate, similar, or close thereto.

[0057] Any component provided by the present invention may be assembled from multiple separate components, or may be a separate component manufactured by an integral molding process.

[0058] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0059] It should also be noted that in the embodiments of the present application, the same figure mark represents the same component or the same part.

[0060] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0061] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A rotating suspended double-tube plasma catalytic reactor, characterized by: It comprises a combined cylinder and a plasma generating device, wherein the plasma generating device is installed on the combined sleeve; The combined sleeve comprises an outer cylinder (2) and an inner cylinder (3), wherein the inner cylinder (3) is rotatably connected to the interior of the outer cylinder (2), a catalyst storage cavity is provided in the inner cylinder (3), and the catalyst storage cavity is used to store the catalyst, and a plurality of fan blades (11) are fixed in the inner cylinder (3), and the fan blades (11) are located below the catalyst storage cavity, and an air inlet cavity is fixed at the bottom of the outer cylinder (2), and the air inlet cavity and the bottom of the inner cylinder (3) are connected. The air inlet chamber is connected to a plurality of air inlet pipes (6), and the reaction gas blown in from the air inlet pipes (6) can drive the fan blades (11) and the inner cylinder (3) to rotate. The space between the outer cylinder (2) and the inner cylinder (3) is a gas flow cavity. The upper opening of the inner cylinder (3) is connected to the gas flow cavity. The outer cylinder (2) is connected to a plurality of air outlet pipes (5), and the gas in the gas flow cavity can flow out from the air outlet pipes (5); The plasma generating device is used for discharging in the combined sleeve.

2. The rotating suspended twin-tube plasma catalytic reactor according to claim 1, characterized in that: The outer cylinder (2) and the inner cylinder (3) are both cylindrical structures, the outer diameter of the outer cylinder (2) is 30 mm, and the outer diameter of the inner cylinder (3) is 20 mm; The central axis of the outer cylinder (2) and the central axis of the inner cylinder (3) are coaxially arranged.

3. The rotating suspended double-tube plasma catalytic reactor according to claim 1, characterized in that: A rotation mounting hole is provided at the bottom of the outer cylinder (2), a rotation bearing is installed at the rotation mounting hole, the outer ring of the rotation bearing is fixed at the rotation mounting hole, and the outer wall of the inner cylinder (3) is fixedly connected to the inner ring of the rotation bearing.

4. The rotating suspended twin-tube plasma catalytic reactor according to claim 1, characterized in that: An upper filter screen (10) is fixed above the catalyst storage chamber, and a lower filter screen (4) is fixed below the catalyst storage chamber.

5. The rotating suspended twin-tube plasma catalytic reactor according to claim 4, characterized in that: A plurality of upper spring latches and a plurality of lower spring latches are fixed on the inner wall of the inner cylinder (3), wherein the upper spring latches are located above the lower spring latches, the upper spring latches are used to fix the upper filter screen (10), and the lower spring latches are used to fix the lower filter screen (4).

6. The rotating suspended twin-tube plasma catalytic reactor according to claim 1, characterized in that: The plasma generating device comprises a high-voltage electrode (8), a metal component (9) and a grounding electrode (7); one end of the high-voltage electrode (8) extends into the interior of the inner cylinder (3); the other end of the high-voltage electrode (8) is connected to a power supply; the metal component (9) is fixed to the outside of the outer cylinder (2); and the metal component (9) is connected to the grounding electrode (7).

7. The rotating suspended twin-tube plasma catalytic reactor according to claim 6, characterized in that: A fixed installation hole is provided at the center of the upper end of the outer cylinder (2), a barrel plug (1) is installed at the fixed installation hole, and the high-voltage electrode (8) is installed on the barrel plug (1).

8. The rotating suspended twin-tube plasma catalytic reactor according to claim 6, characterized in that: The high voltage electrode (8) has a spiral structure.

9. The rotating suspended twin-tube plasma catalytic reactor according to claim 8, characterized in that: The high-voltage electrode (8) is a metal spiral rod, the metal component (9) is an iron wire, and the grounding electrode (7) is a metal rod.

10. The rotating suspended twin-tube plasma catalytic reactor according to claim 1, characterized in that: A plurality of blade slots are provided on the inner wall of the inner cylinder (3), the outer edges of the fan blades (11) are inserted into the blade slots, and a sealing strip is provided at the gap between the outer edges of the fan blades (11) and the blade slots.

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