Integrated coal bed gas purification device

Abstract

The invention discloses an integrated coalbed methane purification device, and relates to the technical field of coalbed methane, the integrated coalbed methane purification device comprises a primary filter box and further comprises a purification box, the input end of the purification box is fixedly installed at the output end of the primary filter box, a volume reduction channel is fixedly installed at an inlet in the purification box, and the caliber of the input end of the volume reduction channel is larger than that of the output end; a transmission channel is rotatably mounted at the output end of the capacity reduction channel, the transmission channel is rotatably mounted on a capacity expansion channel, the caliber of the input end of the capacity expansion channel is smaller than that of the output end of the capacity expansion channel, and the output end of the capacity expansion channel is fixedly mounted outside the activated carbon purification plate; a big-to-small and big-to-big airflow channel combination formed by combining three channels is arranged in the purification box, and a partition cover and a spiral piece are arranged in an expansion channel, so that the adsorption effect of coal bed gas on an activated carbon purification plate is effectively improved, airflow distribution is uniform, the overall utilization rate of the activated carbon purification plate is effectively improved, and the service life of the activated carbon purification plate is prolonged. And therefore, the overall working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal bed methane, and in particular to an integrated coal bed methane purification device. Background Art

[0002] Coalbed methane is a gas resource that coexists with coal. Its main component is methane, and it also contains a small amount of carbon dioxide, nitrogen, etc. It is a clean energy with the advantages of high calorific value and low pollution. Coalbed methane mining technology includes ground mining and underground mining. Ground mining mainly includes vertical wells and horizontal wells, while underground mining is carried out by extraction in coal mines. Coalbed methane can be used in power generation, heating, industrial fuel and other fields, and can also be used as a chemical raw material to produce methanol, synthetic ammonia and other products.

[0003] Necessity of purification: Coalbed methane contains impurities, such as hydrogen sulfide, carbon dioxide, water, etc. These impurities will affect the quality and utilization efficiency of coalbed methane, so it needs to be purified. Purification methods: Coalbed methane purification methods include physical adsorption, chemical absorption, membrane separation, etc. Physical adsorption is to purify impurities by adsorption of adsorbents; chemical absorption is to convert impurities into other substances through chemical reactions; membrane separation is to separate by using the selective permeability of the membrane.

[0004] In the prior art, in the selection of coalbed methane purification equipment, physical adsorption methods are usually used for treatment. The physical adsorption method usually uses an activated carbon adsorption plate for purification and adsorption. However, when coalbed methane is transmitted to the activated carbon adsorption plate, it is difficult to be transmitted to the entire surface of the activated carbon adsorption plate. Only a local position on the activated carbon adsorption plate will be used. The utilization rate of the activated carbon adsorption plate is low, resulting in frequent replacement, affecting the overall work efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated coalbed methane purification device to solve the problem of low utilization rate of the above-mentioned activated carbon adsorption plate.

[0006] The present invention is achieved through the following technical solutions: The integrated coalbed methane purification device includes a primary filter box and also includes: A purification box, wherein the input end of the purification box is fixedly installed on the output end of the primary filter box, a shrinking channel is fixedly installed at the entrance inside the purification box, the input port diameter of the shrinking channel is larger than the output port diameter, a transmission channel is rotatably installed on the output end of the shrinking channel, the transmission channel is rotatably installed on the expansion channel, the input port diameter of the expansion channel is smaller than the output port diameter, the output end of the expansion channel is fixedly installed on the outside of the activated carbon purification board, the activated carbon purification board is fixedly installed on the inner outer wall of the purification box, and the airflow channel that changes from large to small and then to large again helps to achieve a more uniform distribution of coalbed methane on the surface of the activated carbon purification board by aggregating and dispersing the airflow.

[0007] Furthermore, a suction fan is fixedly installed in the transmission channel, and a partition cover is fixedly installed on the outside of the activated carbon purification plate. The input port diameter of the partition cover is smaller than the output port diameter. The partition cover divides the interior of the expansion channel into two parts. The interior of the partition cover is an inner space, and the exterior of the partition cover is an outer space. A spiral blade is fixedly installed on the outside of the partition cover. The spiral blade can make the airflow form a spiral flow in the channel, so that the airflow is more evenly distributed in the entire channel.

[0008] Furthermore, a diversion mechanism is also provided in the transmission channel, and the diversion mechanism includes a rotating ring, which is rotatably mounted on the input end of the separation cover, and a diversion plate is fixedly mounted on the outside of the rotating ring, and the diversion plate is fixedly mounted on the inner outer wall of the transmission channel.

[0009] Furthermore, there are six diverter plates, and the six diverter plates are evenly distributed around the circumference of the rotating ring, so that the airflow flows evenly.

[0010] Furthermore, there are six groups of spiral blades, and the starting sections of the six groups of spiral blades are respectively distributed corresponding to the six diverter plates to avoid the situation where the local airflow is too strong or too weak.

[0011] Furthermore, the diverter plate is provided with through holes, and inclined plates are fixedly mounted on the left and right outer walls of the diverter plate to slow down the air flow speed.

[0012] Furthermore, an auxiliary mechanism is provided in the partition cover, and the auxiliary mechanism includes a limit frame, which is fixedly installed on the inner outer wall of the partition cover, and a hollow plate is slidably installed on the limit frame. The hollow plate is provided with air holes to generate local airflow injection.

[0013] Furthermore, an elastic element is provided between the bottom of the hollow plate and the inner outer wall of the separation cover, an arc plate is fixedly installed on the top of the hollow plate, and an arc rod is fixedly installed on the inner outer wall of the rotating ring, so that the hollow plate can return to its initial position.

[0014] Furthermore, the exterior of the arc-shaped rod is configured to be spherical, and the spherical end of the arc-shaped rod is disposed close to the exterior of the arc-shaped plate, thereby reducing the contact area and alleviating wear.

[0015] Furthermore, there are two groups of the limiting frames, which are respectively arranged at the front and rear ends of the hollow plate to provide a limiting effect.

[0016] Furthermore, a multi-layer gradient filter is arranged inside the primary filter box, and the multi-layer gradient filter includes a metal filter layer, a fiber filter cloth layer and a ceramic particle layer. The aperture of the multi-layer gradient filter decreases step by step along the air flow direction, and is used to intercept solid impurities of different particle sizes and separate liquid components.

[0017] Furthermore, the driving motor of the suction fan is connected to a frequency conversion controller, and the frequency conversion controller dynamically adjusts the speed of the suction fan according to the real-time air pressure data in the purification box to maintain stable airflow pressure.

[0018] Furthermore, the through holes are distributed in a staggered manner on the surface of the splitter plate, and the diameter of the through holes gradually increases from the root to the end of the splitter plate, which is used to gradiently disperse the airflow and reduce the turbulence intensity.

[0019] Furthermore, the elastic element is a butterfly spring, and its stiffness coefficient matches the rotation frequency of the arc rod, so that the knocking frequency of the hollow plate is controlled within the range of 10-20 times / minute, avoiding component fatigue caused by excessive vibration.

[0020] Furthermore, an openable sealing cover is provided on the top of the purification box, an annular sealing ring is embedded inside the sealing cover, and the edge of the sealing cover is connected to the purification box by a quick-release buckle, which is convenient for replacing the activated carbon purification plate and cleaning and maintenance of the spiral blades.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention forms an airflow channel combination that changes from large to small and then to large through three channels, namely, a contraction channel, a transmission channel and an expansion channel. The aggregation and redispersion of the airflow through the airflow channel that changes from large to small and then to large helps to achieve a more uniform distribution of coalbed methane on the surface of the activated carbon purification plate. In addition, a separation cover and a spiral sheet are arranged in the expansion channel, which can effectively improve the adsorption effect of coalbed methane on the activated carbon purification plate, and make the airflow distribution uniform, effectively improve the overall utilization rate of the activated carbon purification plate, and thus improve the overall work efficiency; 2. The present invention is provided with a diversion mechanism, six groups of diversion plates and inclined plates, which can effectively slow down the airflow speed, and the diversion effect of the six groups can reduce the local blockage and wear of the activated carbon purification plate, improve the service life and filtering effect of the activated carbon purification plate, make the airflow flow in the channel more uniform, avoid the situation where the local airflow is too strong or too weak, thereby improving the coverage effect of the airflow on the activated carbon purification plate; 3. The present invention is provided with an arc rod and a hollow plate, and utilizes the rotation of a rotating ring so that the hollow plate can intermittently knock on the partition cover, thereby preventing impurities from adhering to the partition cover and the spiral sheet for a long time, thereby improving the smoothness of the use of the channel. At the same time, each time the hollow plate is knocked, the airflow passing through the air hole will cause disturbance in the airflow near the air hole, and this disturbance will increase the resistance of the airflow, thereby slowing down the flow rate of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the purification box; Figure 3 It is a schematic diagram of the internal structure of the shrinkage channel; Figure 4 This is a schematic diagram of the internal structure of the expansion channel; Figure 5 Schematic diagram of the external structure of the spiral blade; Figure 6 It is a schematic diagram of the external local structure of the manifold; Figure 7 It is a schematic diagram of the external local structure of the hollow plate; Figure 8 Schematic diagram of the external local structure of the rotating ring.

[0023] The reference numerals represent: 1-purification box, 2-primary filter box, 3-capacity reduction channel, 4-transmission channel, 5-capacity expansion channel, 6-activated carbon purification plate, 7-suction fan, 8-partition cover, 9-spiral sheet, 10-rotating ring, 11-diverter plate, 12-through hole, 13-inclined plate, 14-limiting frame, 15-hollow plate, 16-wind hole, 17-arc plate, 18-arc rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0025] Embodiment 1, as Figures 1 to 8 As shown, the present invention includes a primary filter box 2, and also includes: A purification box 1, wherein the input end of the purification box 1 is fixedly mounted on the output end of the primary filter box 2, a shrinking channel 3 is fixedly mounted at the entrance inside the purification box 1, the input port diameter of the shrinking channel 3 is larger than the output port diameter, a transmission channel 4 is rotatably mounted on the output end of the shrinking channel 3, the transmission channel 4 is rotatably mounted on the expansion channel 5, the input port diameter of the expansion channel 5 is smaller than the output port diameter, the output end of the expansion channel 5 is fixedly mounted on the outside of the activated carbon purification plate 6, and the activated carbon purification plate 6 is fixedly mounted on the inner outer wall of the purification box 1; A suction fan 7 is fixedly installed in the transmission channel 4, and a partition cover 8 is fixedly installed outside the activated carbon purification plate 6. The input port diameter of the partition cover 8 is smaller than the output port diameter. The partition cover 8 divides the interior of the expansion channel 5 into two parts. The interior of the partition cover 8 is the inner space, and the exterior of the partition cover 8 is the outer space. A spiral blade 9 is fixedly installed outside the partition cover 8.

[0026] In the above technical scheme, the coalbed methane is first filtered out of the mixed solid and liquid impurities through the primary filter box 2, and then the coalbed methane will enter the purification box 1. The suction fan 7 in the purification box 1 is started to provide power for the coalbed methane after the primary filtration. The coalbed methane in the purification box 1 will pass through the contraction channel 3, the transmission channel 4 and the expansion channel 5 in turn, and then pass through the activated carbon purification plate 6 for purification. The contraction channel 3, the transmission channel 4 and the expansion channel 5 form an airflow channel combination that changes from large to small and then to large. The aggregation and dispersion of the airflow through the airflow channel that changes from large to small and then to large helps to achieve a more uniform distribution of the coalbed methane on the surface of the activated carbon purification plate 6. When the airflow enters the small channel from the large channel, the airflow is aggregated and the flow rate The airflow is relatively accelerated, so that the components in the coalbed methane can be better mixed. Then, when entering the large channel from the small channel, the airflow is dispersed by the partition cover 8 set in the expansion channel 5. Under the action of the diversion structure, the coalbed methane is diverted into the central and surrounding airflows, which further refines the distribution of the airflow, so that the airflow can cover the activated carbon purification plate 6 more comprehensively. This uniform distribution effect helps to improve the overall adsorption efficiency of the activated carbon purification plate 6, avoiding excessive local adsorption and insufficient adsorption in other parts. The aggregation and re-dispersion process of the airflow changes the flow state of the coalbed methane. During the aggregation process, the airflow speed is accelerated, which increases the collision frequency between coalbed methane molecules, which helps to separate some of the molecules that were originally difficult to adsorb. The components are converted into a state that is more easily adsorbed by activated carbon. During the dispersion process, the airflow rushes to the activated carbon adsorption plate in different directions and speeds, which increases the opportunities and angles of contact between the coalbed methane molecules and the activated carbon surface. This multi-angle and multi-opportunity contact can enhance the power of adsorption and improve the adsorption effect. At the same time, a spiral sheet 9 is arranged outside the separation cover 8. The spiral sheet 9 can make the airflow form a spiral flow in the channel, so that the airflow is more evenly distributed in the entire channel, reducing the local concentration and eddy current phenomenon of the airflow, improving the stability and uniformity of the airflow, and making the airflow produce a rotating motion in the channel, which can increase the turbulence of the airflow and increase the contact area and contact between the airflow and the activated carbon adsorption plate. time, thereby improving the adsorption efficiency; the spiral guide design can make the airflow produce more mixing and disturbance during the flow process, promote the full mixing of different components in the airflow, improve the mixing efficiency of the airflow, reduce the resistance and pressure loss of the airflow, thereby reducing the energy consumption of the fan, improving the energy utilization efficiency, saving energy, and reducing operating costs. Finally, by arranging a combination of three channels in the purification box 1 to form an airflow channel combination that changes from large to small and then to large, and arranging a partition cover 8 and a spiral blade 9 in the expansion channel 5, the adsorption effect of coalbed methane on the activated carbon purification plate 6 can be effectively improved, and the airflow distribution is even, the overall utilization rate of the activated carbon purification plate 6 is effectively improved, thereby improving the overall work efficiency.

[0027] like Figure 5 and Figure 6As shown, in the present invention, a diversion mechanism is also provided, which includes a rotating ring 10, which is rotatably mounted on the input end of the separation cover 8, and a diversion plate 11 is fixedly mounted on the outside of the rotating ring 10, and the diversion plate 11 is fixedly mounted on the inner outer wall of the transmission channel 4. There are six diversion plates 11, and the six diversion plates 11 are evenly distributed around the circumference of the rotating ring 10. There are six groups of spiral sheets 9, and the starting sections of the six groups of spiral sheets 9 are respectively distributed corresponding to the six diversion plates 11. A through hole 12 is opened on the diversion plate 11, and inclined plates 13 are fixedly mounted on the left and right outer walls of the diversion plate 11.

[0028] In the above technical scheme, the transmission channel 4 rotates due to the rotation of the suction fan 7, and the rotation of the transmission channel 4 will drive the diverter plate 11 and the rotating ring 10 to rotate together. In the process of transmitting the coalbed methane into the expansion channel 5, the coalbed methane will be diverted through the diverter plate 11 on the rotating ring 10 and divided into two groups of airflows, the center and the edge. The airflow at the edge will pass through the six groups of diverter plates 11 and enter the positions of the six groups of spiral sheets 9 for further diversion. The rotation of the transmission channel 4 causes the diverter plate 11 to rotate as well. The rotation of the diverter plate 11 disturbs the nearby airflow through its own through hole 12, slowing down the airflow movement speed, and the inclined plate 13 can improve the airflow coverage. The setting of the inclined plate 13 can make the airflow flow more uniform in the channel to avoid excessive local airflow or excessive The situation of weak flow can improve the coverage effect of the airflow on the activated carbon purification plate 6, and can also reduce the impact of the airflow. Slowing down the airflow speed can reduce the impact of the airflow on the activated carbon purification plate 6, reduce the wear and damage of the airflow on the surface of the activated carbon purification plate 6, and extend the service life of the activated carbon purification plate 6. The uniform airflow distribution and lower airflow speed are helpful to improve the quality and stability of adsorption, and reduce fluctuations and errors in the adsorption process. Finally, by setting six groups of diversion plates 11 and inclined plates 13, the airflow speed can be effectively slowed down, and the diversion effect of the six groups can reduce the local blockage and wear of the activated carbon purification plate 6, improve the service life and filtering effect of the activated carbon purification plate 6, make the airflow flow in the channel more uniform, avoid the situation that the local airflow is too strong or too weak, thereby improving the coverage effect of the airflow on the activated carbon purification plate 6.

[0029] Embodiment 2: Based on embodiment 1, this embodiment further provides an auxiliary mechanism, such as Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the auxiliary mechanism includes a limit frame 14, which is fixedly mounted on the inner and outer walls of the partition cover 8, and a hollow plate 15 is slidably mounted on the limit frame 14, and a vent 16 is provided on the hollow plate 15. An elastic element is provided between the bottom of the hollow plate 15 and the inner and outer walls of the partition cover 8, and the elastic element here uses a metal spring, so that the movement of the hollow plate 15 has an elastic restoring force. In the absence of external force, the hollow plate 15 can be restored to the initial position by elastic force, and an arc plate 17 is fixedly mounted on the top of the hollow plate 15, and an arc rod 18 is fixedly mounted on the inner and outer walls of the rotating ring 10. The outer part of the arc rod 18 is set to be spherical to reduce the contact area and reduce wear. The spherical end of the arc rod 18 is set close to the outer part of the arc plate 17. There are two groups of limit frames 14, which are respectively set at the front and rear ends of the hollow plate 15, so that the hollow plate 15 is restricted between the two groups of limit frames 14, so that the hollow plate 15 can only slide up and down.

[0030] Embodiment 3: Based on Embodiment 1, this embodiment further optimizes the structure and function of the integrated coalbed methane purification device, specifically including the following improvements.

[0031] Inside the primary filter box 2, a metal filter layer, a fiber filter cloth layer and a ceramic particle layer are fixedly installed in sequence along the airflow direction. The metal filter layer has a pore size of 2 mm, which is used to intercept larger particles of coal slag in coalbed methane; the fiber filter cloth layer is woven with hydrophobic polyester fiber, which can adsorb liquid components and prevent agglomeration; the ceramic particle layer is filled with porous ceramic balls with a pore size of 0.5 mm, which is used to further filter micron-level dust. Through the gradient aperture design (gradually reduced from 2 mm to 0.5 mm), the graded interception of solid impurities and the effective separation of liquid components are achieved, reducing the risk of blockage in the subsequent purification box 1. The drive motor of the suction fan 7 is connected to a frequency conversion controller, and the frequency conversion controller has a built-in pressure sensor to monitor the air pressure data in the purification box 1 in real time. When the air pressure is lower than the preset threshold, the frequency conversion controller automatically increases the speed of the suction fan 7 to enhance the suction force. When the air pressure is too high, the speed is reduced to avoid overloading the activated carbon purification plate 6. This design can dynamically maintain the stability of the airflow pressure and balance the purification efficiency and energy consumption (experiments show that the energy saving rate is 15%-20%). The through holes 12 on the surface of the splitter plate 11 are arranged in a staggered diamond array, and the diameter of the through holes gradually increases from the root near the rotating ring 10 to the end. This design produces a gradient diffusion effect when the airflow passes through the splitter plate 11. The small holes at the root initially disperse the airflow, and the large holes at the end further reduce the flow rate. Combined with the diversion effect of the inclined plate 13, the turbulence intensity is reduced by 30%-40%, ensuring that the airflow evenly covers the surface of the activated carbon purification plate 6. The elastic element is a butterfly spring with a stiffness coefficient of 50N / mm, which matches the rotation frequency of the arc rod 18 (determined by the speed of the transmission channel 4). When the suction fan 7 runs at rated power, the rotation frequency of the arc rod 18 is 15 times / minute, and the deformation of the butterfly spring is controlled within the range of 2mm-3mm, so that the knocking frequency of the hollow plate 15 on the partition cover 8 is stabilized at 12-18 times / minute, which can effectively shake off the attached impurities and avoid high-frequency vibration causing metal fatigue of the limit frame 14 or the hollow plate 15. An openable sealing cover is added to the top of the purification box 1. A ring-shaped sealing ring made of high-temperature resistant silicone is embedded inside the cover. The edge of the cover is locked with the purification box 1 through four sets of quick-release buckles. When it is necessary to replace the activated carbon purification plate 6 or clean the spiral sheet 9, the cover can be lifted up by simply releasing the buckle. The operation time is shortened from 30 minutes for traditional bolt disassembly to 5 minutes, which significantly improves the convenience of maintenance.

[0032] Embodiment 4: Based on embodiment 1, this embodiment proposes a specific working principle of an integrated coalbed methane purification device.

[0033] In the above technical solution, during the rotation of the transmission channel 4, the transmission channel 4 drives the rotating ring 10 to rotate through the diverter plate 11, and the rotating ring 10 can drive the arc rod 18 to follow the rotation. As the arc rod 18 follows the rotation, the spherical end of the arc rod 18 will gradually approach the arc plate 17 at the top of the hollow plate 15. When the spherical end of the arc rod 18 contacts the outside of the arc plate 17, the arc rod 18 continues to rotate with the rotating ring 10, and the spherical end of the arc rod 18 will gradually move closer to the arc plate 17 at the top of the hollow plate 15. The outer part of the arc plate 17 is squeezed, so that the arc plate 17 pushes the hollow plate 15 downward, so that the hollow plate 15 moves downward along the limit frame 14 to knock the inner and outer walls of the separation cover 8, so that the separation cover 8 vibrates, and the vibration can prevent impurities from adhering to the separation cover 8. At the same time, the vibration will also be transmitted to the spiral piece 9 to prevent impurities from adhering to the spiral piece 9 and affecting the work efficiency. When the spherical end of the arc rod 18 is separated from the arc plate 17, the hollow plate 15 will be due to The arc rod 18 moves upward to return to its initial position due to the elastic force of the elastic element. In the process of the rotating ring 10 driving the arc rod 18 to rotate, each time the arc rod 18 contacts the arc plate 17, the hollow plate 15 will knock on the inner and outer walls of the partition cover 8. Each time the hollow plate 15 knocks on the inner and outer walls of the partition cover 8, the knocking force will cause the hollow plate 15 to vibrate. Since the hollow plate 15 is a hollow structure, the internal air is enclosed therein. When the hollow plate 15 is knocked, the airflow passes through the air hole 16, which will cause the airflow near the air hole 16 to be disturbed. This disturbance will increase the resistance of the airflow, thereby slowing down the flow rate of the airflow. At the same time, when the airflow passes through the air hole 16, it will have a certain scouring effect on the surface of the hollow plate 15. This scouring effect can reduce the attachment and accumulation of impurities on the surface of the hollow plate 15, and the airflow passing through the air hole 16 will cause the gas near the air hole 16 to be continuously exchanged and mixed. This gas exchange and mixing can improve the quality and utilization efficiency of the gas. Finally, by providing an arc rod 18 and a hollow plate 15, and utilizing the rotation of the rotating ring 10, the hollow plate 15 can intermittently knock the partition cover 8, thereby preventing impurities from adhering to the partition cover 8 and the spiral blade 9 for a long time, thereby improving the smoothness of the channel use. In summary, by providing an airflow channel combination that changes from large to small and then to large again by providing three channels in the purification box 1, and providing a partition cover 8 and a spiral blade 9 in the expansion channel 5, the adsorption effect of coalbed methane on the activated carbon purification plate 6 can be effectively improved, and the airflow distribution can be made uniform, the overall utilization rate of the activated carbon purification plate 6 can be effectively improved, and the overall work efficiency can be improved. The airflow speed is slowed down by the diversion mechanism, so that the flow of the airflow is more uniform and the filtering effect is improved.

[0034] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated coalbed methane purification device, comprising a primary filter box (2), characterized in that: Also includes: A purification box (1), wherein the input end of the purification box (1) is fixedly mounted on the output end of the primary filter box (2), a contraction channel (3) is fixedly mounted at the entrance inside the purification box (1), the input port diameter of the contraction channel (3) is larger than the output port diameter, a transmission channel (4) is rotatably mounted on the output end of the contraction channel (3), the transmission channel (4) is rotatably mounted on the expansion channel (5), the input port diameter of the expansion channel (5) is smaller than the output port diameter, the output end of the expansion channel (5) is fixedly mounted on the outside of an activated carbon purification plate (6), and the activated carbon purification plate (6) is fixedly mounted on the inner outer wall of the purification box (1).

2. The integrated coalbed methane purification device according to claim 1 is characterized in that: A suction fan (7) is fixedly installed in the transmission channel (4), and a partition cover (8) is fixedly installed outside the activated carbon purification plate (6). The diameter of the input port of the partition cover (8) is smaller than the diameter of the output port. The partition cover (8) divides the inside of the expansion channel (5) into two parts. The inside of the partition cover (8) is an inner space, and the outside of the partition cover (8) is an outer space. A spiral blade (9) is fixedly installed outside the partition cover (8).

3. The integrated coalbed methane purification device according to claim 2 is characterized in that: A flow dividing mechanism is also provided in the transmission channel (4), the flow dividing mechanism comprising a rotating ring (10), the rotating ring (10) being rotatably mounted on the input end of the separation cover (8), a flow dividing plate (11) being fixedly mounted on the outside of the rotating ring (10), and the flow dividing plate (11) being fixedly mounted on the inside outer wall of the transmission channel (4).

4. The integrated coalbed methane purification device according to claim 3 is characterized in that: The number of the diverter plates (11) is six, and the six diverter plates (11) are evenly distributed about the circumference of the rotating ring (10).

5. The integrated coalbed methane purification device according to claim 4 is characterized in that: The spiral blades (9) are provided in six groups, and the starting sections of the six groups of spiral blades (9) are respectively distributed corresponding to the six flow dividing plates (11).

6. The integrated coalbed methane purification device according to claim 5 is characterized in that: The diverter plate (11) is provided with a through hole (12), and inclined plates (13) are fixedly mounted on the left and right outer walls of the diverter plate (11).

7. The integrated coalbed methane purification device according to claim 6, characterized in that: An auxiliary mechanism is also provided in the partition cover (8), the auxiliary mechanism comprising a limit frame (14), the limit frame (14) being fixedly mounted on the inner outer wall of the partition cover (8), a hollow plate (15) being slidably mounted on the limit frame (14), and a vent (16) being provided on the hollow plate (15).

8. The integrated coalbed methane purification device according to claim 7 is characterized in that: An elastic element is provided between the bottom of the hollow plate (15) and the inner outer wall of the partition cover (8), an arc-shaped plate (17) is fixedly mounted on the top of the hollow plate (15), and an arc-shaped rod (18) is fixedly mounted on the inner outer wall of the rotating ring (10).

9. The integrated coalbed methane purification device according to claim 8, characterized in that: The exterior of the arc-shaped rod (18) is arranged in a spherical shape, and the spherical end of the arc-shaped rod (18) is arranged close to the exterior of the arc-shaped plate (17).

10. The integrated coalbed methane purification device according to claim 9, characterized in that: There are two groups of the limiting frames (14), and the two groups of the limiting frames (14) are respectively arranged at the front and rear ends of the hollow plate (15).

11. The integrated coalbed methane purification device according to claim 10, characterized in that: The primary filter box (2) is provided with a multi-layer gradient filter screen inside, the multi-layer gradient filter screen comprising a metal filter screen layer, a fiber filter cloth layer and a ceramic particle layer, and the aperture of the multi-layer gradient filter screen decreases step by step along the airflow direction.

12. The integrated coal bed gas purification device according to claim 11, characterized in that: A drive motor is arranged inside the suction fan (7), and the drive motor is connected to a frequency conversion controller which dynamically adjusts the rotation speed of the suction fan according to real-time air pressure data in the purification box (1).

13. The integrated coal bed gas purification device according to claim 12, characterized in that: The through holes (12) are distributed in a staggered manner on the surface of the splitter plate (11), and the diameter of the through holes gradually increases from the root to the end of the splitter plate.

14. The integrated coal bed gas purification device according to claim 13, characterized in that: The elastic element is a butterfly spring, and the stiffness coefficient of the butterfly spring matches the rotation frequency of the arc rod (18).

15. The integrated coal bed gas purification device according to claim 14, characterized in that: An openable sealing cover is provided on the top of the purification box (1), an annular sealing ring is embedded inside the sealing cover, and the edge of the sealing cover is connected to the purification box (1) via a quick-release buckle.

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