Tail gas purification device of carbon dioxide to methane system

Abstract

This invention relates to the field of exhaust gas purification technology and discloses an exhaust gas purification device for a carbon dioxide to methane system, including a smoke separator, a purification device, an ignition device, and a transmission assembly. When the sodium carbonate solution in the liquid separator base is less than half the volume of the liquid separator base, the liquid pump on the smoke separator device injects sodium carbonate solution from the flexible spherical shell into the liquid separator base to replenish the sodium carbonate solution. When the sodium carbonate solution in the flexible spherical shell is saturated, the flexible spherical shell will be in a bulging state. At this time, the exhaust gas entering the smoke separator hood will flow along the outer spherical surface of the flexible spherical shell to the smoke separator hole of the smoke separator plate. The smoke separator hole will suddenly reduce the cross-sectional area of ​​the exhaust gas flow, thereby increasing the exhaust gas velocity. The exhaust gas passing through the smoke separator hole will also collide with the delivery hose and the linkage rack, thereby generating exhaust gas turbulence, further increasing the effective contact area and collision opportunities between the sodium carbonate solution and carbon dioxide.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas purification technology, and in particular to an exhaust gas purification device for a carbon dioxide to methane system. Background Technology

[0002] In the process of catalytic hydrogenation of carbon dioxide to produce methane, due to the limitations of reaction conversion rate, the occurrence of side reactions, and the presence of impurities in the feed gas, the generated tail gas usually contains unreacted hydrogen, carbon monoxide, a small amount of carbon dioxide, water vapor, and catalyst dust. If these components are directly emitted into the air, they will pollute the air environment. Therefore, it is crucial to purify the tail gas. During the tail gas treatment process, it is necessary to remove harmful gases to meet emission standards. At the same time, it is also necessary to adsorb and collect solid particles in the tail gas to prevent them from accumulating at the outlet and affecting the compliance of the purified tail gas.

[0003] Existing exhaust gas purification devices generally employ baghouse adsorption, chemical reaction adsorption, or combustion removal methods. However, these methods all face cleaning issues during operation, especially when the adsorption bags reach saturation, necessitating manual cleaning, which is time-consuming, labor-intensive, and inefficient. Furthermore, existing exhaust gas purification devices primarily employ a single-mode purification approach. While this reduces subsequent maintenance complexity, it fails to improve the efficiency and effectiveness of the initial purification when dealing with complex exhaust gases, often requiring secondary treatment to achieve satisfactory results, significantly increasing purification costs. In addition, current technologies lack effective turbulence at the exhaust gas inlet, limiting the impact between the exhaust gas and the adsorption unit. Therefore, a tail gas purification device for carbon dioxide-to-methane systems is needed that can automatically clean the internal components, improve purification efficiency and effectiveness, and effectively turbulent the exhaust gas flow to address the shortcomings of existing exhaust gas purification devices. Summary of the Invention

[0004] The purpose of this invention is to provide a tail gas purification device for a carbon dioxide to methane system, in order to solve the existing technical problems of how to achieve automatic cleaning of the device interior, how to improve the purification efficiency and effect of tail gas, and how to generate effective turbulence in the tail gas.

[0005] To address the aforementioned technical problems, the present invention adopts the following technical solution: a tail gas purification device for a carbon dioxide-to-methane system, comprising a smoke separation device, a purification device, an ignition device, and a transmission assembly; the smoke separation device is fixedly installed at the front end of the purification device; the ignition device is fixedly installed at the rear end of the purification device; the transmission assembly is fixedly installed at the rear end of the purification device; the purification device includes a purification brush, a fan assembly, a control assembly, and a purification housing; the purification brush is fixedly installed on the inner cylindrical surface of the purification housing; the fan assembly is fixedly installed on the side of the control assembly; the control assembly is fixedly installed inside the purification housing along the axial direction of the purification housing; the smoke separation device is fixedly installed at the front end of the purification housing; the ignition device is fixedly installed at the rear end of the purification housing; the transmission assembly is fixedly installed at the rear end of the control assembly; the control assembly is rotatably connected inside the purification housing; when the fan assembly slides back and forth within the control assembly along the radial direction of the purification housing, the fan assembly will cause the exhaust gas to oscillate back and forth along the radial direction of the purification housing, and the airflow generated by the oscillation will cause the purification brush to swing, and the purification brush will adsorb particulate matter in the airflow.

[0006] Furthermore, the smoke distribution device includes a smoke distribution hood, a smoke distribution plate, smoke distribution holes, a compliant spherical shell, and a liquid pump; the rear end of the smoke distribution hood is fixedly installed at the front end of the cleaning shell; the smoke distribution plate is fixedly installed inside the smoke distribution hood; eight smoke distribution holes are distributed on the smoke distribution plate along the circumferential direction; the compliant spherical shell is fixedly installed at the front end of the smoke distribution plate; the liquid pump is fixedly installed inside the smoke distribution plate along the axial direction; and the compliant spherical shell also stores sodium carbonate solution.

[0007] Furthermore, the cleaning device also includes a cleaning mounting base, a delivery hose, a dispensing valve, and a dispensing base; the cleaning mounting base is fixedly installed on the side of the cleaning housing; both ends of the delivery hose are fixedly installed on the front end of the fan assembly and the side of the dispensing valve, respectively; the dispensing valve is fixedly installed on the front end of the dispensing base; the dispensing base is fixedly installed on the front end of the control assembly; the dispensing base contains a sodium carbonate solution.

[0008] Furthermore, the fan assembly includes a fan timing pulley, a fan housing, a fan smoothing plate, an elastic reinforcing rib, a fan screw, a one-way hole, a fan plunger, and a fan nozzle. The fan timing pulley is rotatably connected to the front end of the fan housing. The fan housing is fixedly installed on the side of the control assembly. The fan smoothing plate is fixedly installed on the side of the fan housing. The two ends of the elastic reinforcing rib are fixedly installed on the side of the fan housing and the side of the fan smoothing plate, respectively. The external thread of the fan screw and the internal thread on the fan timing pulley form a threaded pair. The one-way hole is fixedly installed on the side of the fan screw. A one-way valve is also provided inside the one-way hole. The fan plunger is slidably installed inside the fan housing along the axial direction of the fan housing. The front end of the fan plunger is fixedly installed on the rear end of the fan screw. The fan nozzle is fixedly installed on the side of the fan housing. The fan screw stores a sodium carbonate solution. The fan housing stores a sodium carbonate solution.

[0009] Furthermore, the control assembly includes a control shaft, a linkage rack, a control hexagonal prism, a first sliding beam, a second sliding beam, a third sliding beam, a cleaning turntable, and air outlets; the rear end of the control hexagonal prism is fixedly mounted on the front end of the cleaning turntable; a servo motor is installed inside the control hexagonal prism; the rear end of the control shaft is fixedly mounted on the output end of the servo motor; the linkage rack is fixedly mounted on the side of the control hexagonal prism along the radial direction of the control shaft; the linkage rack also forms a gear rack pair with the fan synchronizing wheel; the first sliding beam is slidably mounted inside the control hexagonal prism along the radial direction of the control shaft; the second sliding beam is slidably mounted inside the control hexagonal prism along the radial direction of the control shaft; the third sliding beam is slidably mounted inside the control hexagonal prism along the radial direction of the control shaft; the rear end of the cleaning turntable is fixedly connected to the front end of the transmission assembly; six air outlets are fixedly mounted on the cleaning turntable along the circumferential direction.

[0010] Furthermore, the control assembly also includes control teeth, rectangular notches, and control grooves; the control teeth are fixedly installed on the side of the control shaft; the rectangular notches are respectively fixedly installed at the center of the first sliding beam, the center of the second sliding beam, and the center of the third sliding beam; the control grooves are fixedly installed on a single side of the rectangular notches; the control grooves mesh with the control teeth.

[0011] Furthermore, the ignition device includes an ignition heat insulation plate, ignition ports, a reflective hexagonal prism, an ignition head, an ignition housing, an exhaust port, and a nut; the ignition heat insulation plate is fixedly installed at the front end of the ignition housing; six ignition ports are fixedly installed on the ignition heat insulation plate along the circumferential direction; the front end of the reflective hexagonal prism is fixedly installed at the rear end of the ignition heat insulation plate; the ignition head is fixedly installed on the inner wall of the ignition housing; the exhaust port is fixedly installed on the side of the ignition housing; the front end of the ignition housing is fixedly installed at the rear end of the cleaning housing; and the front end of the nut is fixedly installed at the rear end of the reflective hexagonal prism.

[0012] Furthermore, the transmission assembly includes a transmission screw and a transmission connector; the front end of the transmission screw is fixedly connected to the rear end of the cleaning turntable; the external thread on the transmission screw and the internal thread on the nut form a threaded pair; the transmission connector is fixedly installed at the rear end of the transmission screw; the rear end of the transmission connector is used to connect to an external power source.

[0013] The beneficial effects of this invention compared with the prior art are: (1) When the sodium carbonate solution in the liquid distribution base is less than half the volume of the liquid distribution base, the liquid pump on the smoke distribution device will inject the sodium carbonate solution in the compliant spherical shell into the liquid distribution base to achieve the function of replenishing the sodium carbonate solution. (2) When the sodium carbonate solution in the compliant spherical shell is saturated, the compliant spherical shell will be in a bulging state. At this time, the exhaust gas entering the smoke distribution hood will flow along the outer spherical surface of the compliant spherical shell to the smoke distribution hole of the smoke distribution plate. The smoke distribution hole will suddenly reduce the cross-sectional area of ​​the exhaust gas flow, thereby increasing the wind speed of the exhaust gas. The exhaust gas passing through the smoke distribution hole will also collide with the conveying hose and the linkage rack, thereby generating exhaust gas turbulence, further increasing the effective contact area and collision opportunity between the sodium carbonate solution and carbon dioxide. (3) When the exhaust gas enters the cleaning housing, the servo motor in the control hexagonal prism drives the control shaft in the control assembly to rotate. The control shaft drives the first sliding beam, the second sliding beam, and the third sliding beam to slide along the radial direction of the control shaft on the control hexagonal prism through the control teeth and the control groove in the rectangular notch. At the same time, the sliding directions of the first sliding beam, the second sliding beam, and the third sliding beam do not coincide. The first sliding beam, the second sliding beam, and the third sliding beam will also drive different fan components to slide separately. The sliding of the fan components will generate radial disturbance to the exhaust gas airflow, so that the solid particles in the exhaust gas will continuously contact the cleaning brush on the inner wall of the cleaning housing and adhere to the cleaning brush. (4) When the fan components slide, the fan synchronous wheel on the fan components will rotate on the linkage rack. At this time, the fan synchronous wheel will drive the fan screw to slide upward. The fan screw will drive the fan plunger to slide upward in the fan housing, so that the sodium carbonate solution in the fan housing will be squeezed out from the fan nozzle. Subsequently, the sodium carbonate solution will react with carbon dioxide and water to form sodium bicarbonate. (5) After the external power source is connected to the transmission joint of the transmission component, the external power source tightens the transmission screw in the nut in the form of tightening bolts. As the transmission screw moves forward in a spiral, the transmission screw drives the cleaning turntable to move forward in a spiral. At this time, the outer cylindrical surface of the cleaning turntable will contact the inner wall of the cleaning housing, thereby pushing the deposited sodium bicarbonate and dust on the cleaning brush forward to achieve the automatic cleaning function. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention in its working state.

[0015] Figure 2 This is a schematic diagram of the structure of the smoke separation device of the present invention. Figure 1 .

[0016] Figure 3 This is a schematic diagram of the structure of the smoke separation device of the present invention. Figure 2 .

[0017] Figure 4 This is a schematic diagram of the cleaning device of the present invention.

[0018] Figure 5 This is a schematic diagram of the structure of the fan assembly of the present invention. Figure 1 .

[0019] Figure 6 This is a schematic diagram of the structure of the fan assembly of the present invention. Figure 2 .

[0020] Figure 7 This is a schematic diagram of the structure of the control component of the present invention.

[0021] Figure 8 This is a schematic diagram of the ignition device of the present invention. Figure 1 .

[0022] Figure 9 This is a schematic diagram of the ignition device of the present invention. Figure 2 .

[0023] Figure 10 This is a schematic diagram of the transmission component of the present invention.

[0024] In the diagram: 1-Smoke separating device; 2-Cleansing device; 3-Ignition device; 4-Transmission assembly; 101-Smoke separating hood; 102-Smoke separating plate; 103-Smoke separating hole; 104-Flexible spherical shell; 105-Liquid pump; 201-Cleansing mounting base; 202-Cleansing brush; 203-Fan assembly; 204-Conveying hose; 205-Liquid dispensing valve; 206-Liquid dispensing base; 207-Control assembly; 208-Cleansing housing; 209-Fan synchronous pulley; 210-Fan housing; 211-Fan flexible plate; 212-Elastic reinforcing rib; 213-Fan screw; 214-One-way hole ; 215-Air plunger; 216-Air nozzle; 217-Control shaft; 218-Linkage rack; 219-Control hexagonal prism; 220-First sliding beam; 221-Second sliding beam; 222-Third sliding beam; 223-Cleaning turntable; 224-Air outlet notch; 225-Control gear; 226-Rectangular notch; 227-Control groove; 301-Ignition heat shield; 302-Ignition port; 303-Reflective hexagonal prism; 304-Ignition head; 305-Ignition housing; 306-Exhaust port; 307-Nut; 401-Transmission screw; 402-Transmission joint. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] Figures 1 to 10 This is a preferred embodiment of the present invention.

[0028] like Figure 1 As shown, the smoke separating device 1 is fixedly installed at the front end of the cleaning device 2; the ignition device 3 is fixedly installed at the rear end of the cleaning device 2; the transmission assembly 4 is fixedly installed at the rear end of the cleaning device 2; the cleaning device 2 includes a cleaning brush 202, a fan assembly 203, a control assembly 207, and a cleaning housing 208; the cleaning brush 202 is fixedly installed on the inner cylindrical surface of the cleaning housing 208; the fan assembly 203 is fixedly installed on the side of the control assembly 207; the control assembly 207 is fixedly installed inside the cleaning housing 208 along the axial direction of the cleaning housing 208; the smoke separating device 1... The cleaning housing 208 is fixedly installed at the front end; the ignition device 3 is fixedly installed at the rear end of the cleaning housing 208; the transmission assembly 4 is fixedly installed at the rear end of the control assembly 207; the control assembly 207 is rotatably connected inside the cleaning housing 208; when the fan assembly 203 slides back and forth in the radial direction of the cleaning housing 208 inside the control assembly 207, the fan assembly 203 will drive the flue gas exhaust gas to oscillate back and forth in the radial direction of the cleaning housing 208. At this time, the airflow generated by the oscillation will drive the cleaning brush 202 to swing, and the cleaning brush 202 will adsorb the particulate matter in the airflow.

[0029] like Figure 2 and Figure 3 As shown, in the smoke distribution device 1, the rear end of the smoke distribution hood 101 is fixedly installed at the front end of the cleaning housing 208; the smoke distribution plate 102 is fixedly installed inside the smoke distribution hood 101; eight smoke distribution holes 103 are distributed on the smoke distribution plate 102 along the circumferential direction; the compliant spherical shell 104 is fixedly installed at the front end of the smoke distribution plate 102; the liquid pump 105 is fixedly installed inside the smoke distribution plate 102 along the axial direction; the compliant spherical shell 104 also stores sodium carbonate solution.

[0030] like Figure 4 As shown, in the cleaning device 2, the cleaning mounting base 201 is fixedly installed on the side of the cleaning housing 208; the two ends of the delivery hose 204 are respectively fixedly installed on the front end of the fan assembly 203 and the side of the liquid dispensing valve 205; the liquid dispensing valve 205 is fixedly installed on the front end of the liquid dispensing base 206; the liquid dispensing base 206 is fixedly installed on the front end of the control assembly 207; the liquid dispensing base 206 contains sodium carbonate solution.

[0031] like Figure 5 and Figure 6 As shown, in the fan assembly 203, the fan timing wheel 209 is rotatably connected to the front end of the fan housing 210; the fan housing 210 is fixedly installed on the side of the control assembly 207; the fan smoothing plate 211 is fixedly installed on the side of the fan housing 210; the two ends of the elastic reinforcing rib 212 are fixedly installed on the side of the fan housing 210 and the side of the fan smoothing plate 211 respectively; the external thread of the fan screw 213 and the internal thread on the fan timing wheel 209 form a threaded pair; the one-way hole 214 is fixedly installed on the side of the fan screw 213; a one-way valve is also provided inside the one-way hole 214; the fan plunger 215 is slidably installed inside the fan housing 210 along the axial direction of the fan housing 210; the front end of the fan plunger 215 is fixedly installed on the rear end of the fan screw 213; the fan nozzle 216 is fixedly installed on the side of the fan housing 210; the fan screw 213 stores sodium carbonate solution; the fan housing 210 stores sodium carbonate solution.

[0032] like Figure 7 As shown, in the control assembly 207, the rear end of the control hexagonal prism 219 is fixedly mounted on the front end of the cleaning turntable 223; a servo motor is installed inside the control hexagonal prism 219; the rear end of the control shaft 217 is fixedly mounted on the output end of the servo motor; a linkage rack 218 is fixedly mounted on the side of the control hexagonal prism 219 along the radial direction of the control shaft 217; the linkage rack 218 also forms a gear rack pair with the fan timing wheel 209; a first sliding beam 220 is slidably mounted inside the control hexagonal prism 219 along the radial direction of the control shaft 217; a second sliding beam 221 is slidably mounted on the control hexagonal prism 219 along the radial direction of the control shaft 217. The third sliding beam 222 is slidably installed inside the control hexagonal prism 219 along the radial direction of the control shaft 217; the rear end of the cleaning turntable 223 is fixedly connected to the front end of the transmission assembly 4; six air outlet notches 224 are fixedly installed on the cleaning turntable 223 along the circumferential direction; control teeth 225 are fixedly installed on the side of the control shaft 217; rectangular notches 226 are respectively fixedly installed at the center of the first sliding beam 220, the center of the second sliding beam 221 and the center of the third sliding beam 222; control grooves 227 are fixedly installed on a single side of the rectangular notches 226; control grooves 227 mesh with control teeth 225.

[0033] like Figure 8 and Figure 9As shown, in the ignition device 3, the ignition heat insulation plate 301 is fixedly installed at the front end of the ignition housing 305; six ignition ports 302 are fixedly installed on the ignition heat insulation plate 301 along the circumferential direction; the front end of the reflective hexagonal prism 303 is fixedly installed at the rear end of the ignition heat insulation plate 301; the ignition head 304 is fixedly installed on the inner wall of the ignition housing 305; the exhaust port 306 is fixedly installed on the side of the ignition housing 305; the front end of the ignition housing 305 is fixedly installed at the rear end of the cleaning housing 208; and the front end of the nut 307 is fixedly installed at the rear end of the reflective hexagonal prism 303.

[0034] like Figure 10 As shown, in the transmission assembly 4, the front end of the transmission screw 401 is fixedly connected to the rear end of the cleaning turntable 223; the external thread on the transmission screw 401 and the internal thread on the nut 307 form a threaded pair; the transmission joint 402 is fixedly installed at the rear end of the transmission screw 401; the rear end of the transmission joint 402 is used to connect to an external power source.

[0035] Working principle of the invention: Figure 1 The invention provides usage methods and corresponding scenarios. The attitude control of the exhaust gas purification process is determined by the smoke separation device 1, the purification device 2, and the ignition device 3. The attitude of the smoke separation device 1 is determined by the purification device 2, and the attitude of the ignition device 3 is determined by the purification device 2. Therefore, the purification device 2 is the core of the exhaust gas purification process.

[0036] Taking a preferred embodiment as an example, such as Figure 2 and Figure 3 As shown, when the sodium carbonate solution in the liquid distribution base 206 decreases, the liquid pump 105 on the smoke distribution device 1 will inject the sodium carbonate solution in the compliant spherical shell 104 into the liquid distribution base 206 to replenish the sodium carbonate solution. When the sodium carbonate solution in the compliant spherical shell 104 is saturated, the compliant spherical shell 104 will be in a bulging state. At this time, the exhaust gas entering the smoke distribution hood 101 will flow along the outer spherical surface of the compliant spherical shell 104 to the smoke distribution hole 103 of the smoke distribution plate 102. The smoke distribution hole 103 will suddenly reduce the cross-sectional area of ​​the exhaust gas flow, thereby increasing the wind speed of the exhaust gas. The exhaust gas passing through the smoke distribution hole 103 will also collide with the delivery hose 204 and the linkage rack 218, thereby generating exhaust gas turbulence, further increasing the effective contact area and collision opportunity between the sodium carbonate solution and carbon dioxide.

[0037] like Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, when exhaust gas enters the purification housing 208, the servo motor inside the control hexagonal prism 219 drives the control shaft 217 in the control assembly 207 to rotate. The control shaft 217, through the control teeth 225 and the control groove 227 in the rectangular notch 226, drives the first sliding beam 220, the second sliding beam 221, and the third sliding beam 222 to slide along the radial direction of the control shaft 217 on the control hexagonal prism 219. At the same time, the first sliding beam 220, the second sliding beam 221, and the third sliding beam 222... The sliding directions of the two components do not coincide. The first sliding beam 220, the second sliding beam 221, and the third sliding beam 222 will also drive different fan components 203 to slide separately. The sliding of the fan components 203 will generate radial disturbance to the exhaust gas airflow, causing solid particles in the exhaust gas to continuously contact and adhere to the cleaning brush 202 on the inner wall of the cleaning housing 208. When the fan components 203 slide, the fan timing wheel 209 on the fan components 203 will rotate on the linkage rack 218. At this time, the fan... The air timing pulley 209 drives the fan screw 213 to slide upwards. The fan screw 213 drives the fan plunger 215 to slide upwards within the fan housing 210, causing the sodium carbonate solution inside the fan housing 210 to be squeezed out from the fan nozzle 216. Subsequently, the sodium carbonate solution reacts with carbon dioxide and water to form sodium bicarbonate. When the amount of sodium carbonate solution inside the fan housing 210 decreases, the liquid level inside the fan housing 210 drops. At this time, the one-way hole 214 on the fan screw 213 will be exposed from the solution. The pressure at orifice 214 will also decrease, and the sodium carbonate solution in the fan screw 213 will quickly open the one-way valve in the one-way orifice 214 to achieve rapid replenishment of the sodium carbonate solution in the fan housing 210; the delivery hose 204 and the liquid distribution valve 205 on the cleaning device 2 are used to deliver the sodium carbonate solution in the liquid distribution base 206 to the fan screw 213 of each fan assembly 203; the elastic reinforcing rib 212 is used to limit the swing range of the fan compliance plate 211; the exhaust notch 224 is used for the passage of exhaust gas.

[0038] like Figure 8 , Figure 9 and Figure 10As shown, after the external power source is connected to the transmission joint 402 of the transmission assembly 4, the external power source tightens the transmission screw 401 in the nut 307 by tightening bolts. As the transmission screw 401 spirals forward, it drives the cleaning disc 223 to spiral forward. At this time, the outer cylindrical surface of the cleaning disc 223 will contact the inner wall of the cleaning housing 208, thereby pushing forward the deposited sodium bicarbonate and dust on the cleaning brush 202 to achieve the automatic cleaning function. When the cleaning disc 223 spirals back to its limit position, the cleaning disc... The vent 224 on 223 is offset from the ignition port 302 on the ignition heat insulation plate 301, so that the internal space of the ignition housing 305 is not connected to the internal space of the purification housing 208. When the ignition head 304 on the ignition device 3 is ignited, carbon monoxide and methane gas are fully combusted in the ignition housing 305. When the flame of the ignition head 304 is sprayed onto the reflective hexagonal prism 303, the reflective hexagonal prism 303 will block the heat, thereby preventing the transmission screw 401 on the transmission assembly 4 from being deformed by heat. The purified gas will be discharged from the exhaust port 306.

[0039] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the protection scope of this invention.

Claims

1. A tail gas purification device for a carbon dioxide to methane system, comprising a smoke separation device (1), a purification device (2), an ignition device (3), and a transmission assembly (4), characterized in that: The smoke distribution device (1) is fixedly installed at the front end of the cleaning device (2); the ignition device (3) is fixedly installed at the rear end of the cleaning device (2); the transmission assembly (4) is fixedly installed at the rear end of the cleaning device (2); the cleaning device (2) includes a cleaning brush (202), a fan assembly (203), a control assembly (207), and a cleaning housing (208); the cleaning brush (202) is fixedly installed on the inner cylindrical surface of the cleaning housing (208); the fan assembly (203) is fixedly installed on the side of the control assembly (207); the control assembly (207) is fixedly installed inside the cleaning housing (208) along the axial direction of the cleaning housing (208); the smoke distribution device (1) is fixedly installed at the front end of the cleaning housing (208); the ignition device (3) The transmission assembly (4) is fixedly installed at the rear end of the cleaning housing (208); the control assembly (207) is fixedly installed at the rear end of the control assembly (207); the control assembly (207) is rotatably connected inside the cleaning housing (208); when the fan assembly (203) slides back and forth in the radial direction of the cleaning housing (208) inside the control assembly (207), the fan assembly (203) will drive the flue gas exhaust gas to oscillate back and forth in the radial direction of the cleaning housing (208), and the airflow generated by the oscillation will drive the cleaning brush (202) to swing, and the cleaning brush (202) will adsorb the particulate matter in the airflow; the smoke distribution device (1) includes a smoke distribution hood (101), a smoke distribution plate (102), a smoke distribution hole (103), a soft ball shell (104), and a liquid pump (105); the smoke distribution device (1) includes a smoke distribution hood (101), a smoke distribution plate (102), a smoke distribution hole (103), a soft ball shell (104), and a liquid pump (105); The rear end of the hood (101) is fixedly installed at the front end of the cleaning housing (208); the smoke distribution plate (102) is fixedly installed inside the smoke distribution hood (101); eight smoke distribution holes (103) are distributed on the smoke distribution plate (102) along the circumferential direction; the compliant spherical shell (104) is fixedly installed at the front end of the smoke distribution plate (102); the liquid pump (105) is fixedly installed inside the smoke distribution plate (102) along the axial direction; the compliant spherical shell (104) also stores sodium carbonate solution; the cleaning device (2) also includes a cleaning mounting base (201), a delivery hose (204), a liquid distribution valve (205), and a liquid distribution base (206); the cleaning mounting base (201) is fixedly installed on the side of the cleaning housing (208); the two ends of the delivery hose (204) are respectively fixed Installed at the front end of the fan assembly (203) and the side of the dispensing valve (205); the dispensing valve (205) is fixedly installed at the front end of the dispensing base (206); the dispensing base (206) is fixedly installed at the front end of the control assembly (207); the dispensing base (206) stores sodium carbonate solution inside; the fan assembly (203) includes a fan timing wheel (209), a fan housing (210), a fan smoothing plate (211), an elastic reinforcing rib (212), a fan screw (213), a one-way hole (214), a fan plunger (215), and a fan nozzle (216); the fan timing wheel (209) is rotatably connected to the front end of the fan housing (210); the fan housing (210) is fixedly installed on the side of the control assembly (207);The fan smoothing plate (211) is fixedly installed on the side of the fan housing (210); the two ends of the elastic reinforcing rib (212) are fixedly installed on the side of the fan housing (210) and the side of the fan smoothing plate (211); the external thread of the fan screw (213) and the internal thread on the fan synchronous pulley (209) form a thread pair; the one-way hole (214) is fixedly installed on the side of the fan screw (213); a one-way valve is also provided inside the one-way hole (214); the fan plunger (215) is slidably installed inside the fan housing (210) along the axial direction of the fan housing (210); The front end of the fan plunger (215) is fixedly installed at the rear end of the fan screw (213); the fan nozzle (216) is fixedly installed on the side of the fan housing (210); the inside of the fan screw (213) stores sodium carbonate solution; the inside of the fan housing (210) stores sodium carbonate solution.

2. The tail gas purification device for a carbon dioxide to methane system according to claim 1, characterized in that: The control assembly (207) includes a control shaft (217), a linkage rack (218), a control hexagonal prism (219), a first sliding beam (220), a second sliding beam (221), a third sliding beam (222), a cleaning turntable (223), and an air outlet (224); the rear end of the control hexagonal prism (219) is fixedly mounted on the front end of the cleaning turntable (223); a servo motor is installed inside the control hexagonal prism (219); the rear end of the control shaft (217) is fixedly mounted on the output end of the servo motor; the linkage rack (218) is fixedly mounted on the side of the control hexagonal prism (219) along the radial direction of the control shaft (217); the linkage rack ( 218) also forms a gear and rack pair with the fan synchronous wheel (209); the first sliding beam (220) is slidably installed inside the control hexagonal prism (219) along the radial direction of the control shaft (217); the second sliding beam (221) is slidably installed inside the control hexagonal prism (219) along the radial direction of the control shaft (217); the third sliding beam (222) is slidably installed inside the control hexagonal prism (219) along the radial direction of the control shaft (217); the rear end of the cleaning turntable (223) is fixedly connected to the front end of the transmission assembly (4); six air outlets (224) are fixedly installed on the cleaning turntable (223) along the circumferential direction.

3. The tail gas purification device for a carbon dioxide to methane system according to claim 2, characterized in that: The control assembly (207) also includes a control tooth (225), a rectangular notch (226), and a control groove (227); the control tooth (225) is fixedly installed on the side of the control shaft (217); the rectangular notch (226) is fixedly installed at the center of the first sliding beam (220), the center of the second sliding beam (221), and the center of the third sliding beam (222), respectively; the control groove (227) is fixedly installed on a single side of the rectangular notch (226); the control groove (227) meshes with the control tooth (225).

4. The tail gas purification device for a carbon dioxide to methane system according to claim 3, characterized in that: The ignition device (3) includes an ignition heat insulation plate (301), an ignition port (302), a reflective hexagonal prism (303), an ignition head (304), an ignition housing (305), an exhaust port (306), and a nut (307). The ignition heat insulation plate (301) is fixedly installed at the front end of the ignition housing (305). Six ignition ports (302) are fixedly installed on the ignition heat insulation plate (301) along the circumferential direction. The front end of the reflective hexagonal prism (303) is fixedly installed at the rear end of the ignition heat insulation plate (301). The ignition head (304) is fixedly installed on the inner wall of the ignition housing (305). The exhaust port (306) is fixedly installed on the side of the ignition housing (305). The front end of the ignition housing (305) is fixedly installed at the rear end of the cleaning housing (208). The front end of the nut (307) is fixedly installed at the rear end of the reflective hexagonal prism (303).

5. The tail gas purification device for a carbon dioxide to methane system according to claim 4, characterized in that: The transmission assembly (4) includes a transmission screw (401) and a transmission connector (402); the front end of the transmission screw (401) is fixedly connected to the rear end of the cleaning turntable (223); the external thread on the transmission screw (401) and the internal thread on the nut (307) form a threaded pair; the transmission connector (402) is fixedly installed at the rear end of the transmission screw (401); the rear end of the transmission connector (402) is used to connect to an external power source.

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