Anti-clogging gas filter device and filtering method

Abstract

The application discloses a kind of anti-clogging gas filter device and filtering method, it is related to gas filtering technical field.The anti-clogging gas filter device, including shell, further include: jet pipe, the jet pipe is located in the middle part of shell;Filtering assembly, multiple filtering assembly is radially arranged in the periphery of jet pipe, gas is filtered along the filtering assembly of different filter hole diameter step by step.The invention sets filtering assembly, jet pipe, pivot and deflection mechanism, multiple filtering assembly is radially arranged in the inside of shell, gas is filtered along the filtering assembly of different filter hole diameter step by step, deflection mechanism is driven filtering assembly deflection with pivot, so that filtering assembly is arranged along its circumferential direction outside jet pipe, and forms sealed chamber, pulse gas is sprayed to sealed chamber by jet pipe, utilizes reverse airflow to impact filtering assembly deformation to generate violent vibration, can strip the dust filter cake on the surface of filtering assembly.

Description

Technical Field

[0001] This invention relates to the field of gas filtration technology, specifically to an anti-clogging gas filtration device and filtration method. Background Technology

[0002] In the coal mining industry, methane gas exists in large quantities underground, escaping from coal seams or surrounding rock. It is colorless, odorless, flammable and explosive. Filtering, dust removal and purification of methane extracted from underground reduces the risk of explosion from vented methane gas. At the same time, high-concentration methane gas can be recovered for power generation or domestic gas supply.

[0003] Current gas separation and purification mainly employs pressure swing adsorption (PSA) technology, which utilizes the differences in equilibrium adsorption capacity or kinetic adsorption rates of adsorbents for different gas components to achieve gas separation. PSA technology has significant advantages such as simple process, compact equipment, low operating costs, high reliability, and strong adaptability, and is therefore widely used in coal mine gas concentration and purification. However, coal mine gas contains a large amount of coal dust and rock dust with a wide particle size range, from fine dust of a few micrometers to coarse particles of hundreds of micrometers, which can clog the pores of the adsorbent. Therefore, it is necessary to perform staged filtration of the gas before it enters the adsorption tower to prevent dust from entering the tower.

[0004] In existing technologies, dust from coal mine gas is often filtered in stages by arranging filter plates with different pore sizes side by side. However, the dust carried by coal mine gas is highly hydrophilic and easily combines with moisture in the gas to form sticky clumps with extremely strong adhesion, making cleaning difficult. If a mechanical brush cleaning method is used, it will not only occupy the effective filtration area of ​​the filter screen, but also cause dust to adhere to the brush, resulting in a short lifespan. The common pulse gas dust removal method uses a high-pressure pulse airflow to instantly reverse-blow the surface of the filter plate. The reverse pulse airflow can remove the dust filter cake, but the dust removed from the filter plate will adhere to the non-dust surface of the adjacent filter plate, affecting the cleaning effect. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an anti-clogging gas filtration device and method, which solves the problem of difficult dust removal from multiple filter plates.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an anti-clogging gas filter device, comprising a housing, and further comprising:

[0007] A jet pipe, wherein the jet pipe is located in the middle of the housing;

[0008] The filter assembly, wherein multiple filter assemblies are arranged radially around the jet pipe, and the gas is filtered step by step along the filter assemblies with different filter hole diameters;

[0009] A rotating shaft is installed at both ends of the filter assembly. The rotation of the shaft causes the filter assembly to deflect by 90°, so that the filter assembly is arranged circumferentially outside the jet pipe and forms a sealed chamber.

[0010] A deflection mechanism is located on the upper part of the filter assembly, and the deflection mechanism can drive the rotating shaft to rotate;

[0011] In the dust removal state, pulsed gas is sprayed into the sealed chamber through the jet pipe, which can peel off the dust filter cake on the surface of the filter component and restore the air permeability of the filter component.

[0012] Furthermore, it also includes:

[0013] A baffle is provided on the inner wall of the housing and corresponds to the position of the filter assembly. A fixed shaft is fixed at the upper end of the baffle.

[0014] A turntable is located above the filter assembly. The turntable has a first through groove that cooperates with the fixed shaft. The radial lengths of the multiple first through grooves on the turntable are different. In the dust cleaning state, the fixed shaft can be slid in the first through groove by rotating the turntable, which can control the baffle to move closer to the filter assembly. The distance between the baffle and the filter assembly decreases as the diameter of the filter holes of the filter assembly increases.

[0015] Furthermore, a second through groove is provided on the turntable. The upper end of the rotating shaft located above the filter assembly passes through the second through groove. By rotating the turntable, the filter assembly slides along the second through groove, which can control the filter assembly to move radially closer to the jet pipe. This makes it easy for different numbers of filter assemblies to form a sealed chamber after being deflected 90° by the deflection mechanism.

[0016] Furthermore, a slide rail is provided radially at the lower end of the interior of the housing, with both ends of the slide rail fixed to the housing and the jet pipe respectively. A groove is provided on the baffle to cooperate with the slide rail, so that the baffle can slide on the slide rail.

[0017] The slide rail is provided with a second slider that cooperates with it, and the second slider is rotatably connected to the rotating shaft located at the bottom of the filter assembly.

[0018] Furthermore, the deflection mechanism includes:

[0019] A deflection gear is sleeved on the outside of the rotating shaft, and a toothed ring is provided on the outside of the deflection gear. The rotation of the toothed ring can drive the filter assembly to deflect 90°.

[0020] The first gear has one shaft extending outside the housing, and the first gear is fitted on the outside of the housing. A rack is provided on the outside of the first gear. A first cylinder is fixed on the upper surface of the housing, and the piston rod end of the first cylinder is fixedly connected to the rack.

[0021] Furthermore, an arc-shaped toothed plate is fixed on the upper surface of the turntable, a second gear is provided on the outside of the arc-shaped toothed plate, and a motor capable of driving the central shaft of the second gear to rotate is provided above the second gear.

[0022] Furthermore, the filter assembly also includes a mounting frame on which filter media is fixed, and sealing gaskets are fixed on both sides of the mounting frame, with the rotating shaft located at both ends of the mounting frame.

[0023] Furthermore, it also includes:

[0024] A support frame, located at the lower part of the housing, is used to support the housing;

[0025] The intake pipe and exhaust pipe are respectively connected to the inside of the housing.

[0026] Furthermore, it also includes:

[0027] A valve plate, located at the lower end of the housing, is used to close the housing;

[0028] A connecting frame is provided, one end of which is fixed to a valve plate. A mounting bracket is fixed on a support frame. The connecting frame is rotatably mounted on the mounting bracket, and a second cylinder is rotatably mounted on the support frame. The piston rod end of the second cylinder is hinged to the connecting frame.

[0029] On the other hand, the present invention also provides a method for preventing clogging of gas filtration, comprising the following steps:

[0030] In the filtration stage, the gas passes through multiple filter components arranged in descending order of pore diameter, and the filter components perform graded filtration of dust in the gas.

[0031] During the dust removal stage, the deflection mechanism drives the filter assembly to deflect 90°, so that the filter assembly is arranged circumferentially outside the jet pipe and forms a sealed chamber. Pulsed gas is sprayed into the sealed chamber through the jet pipe, which can peel off the dust cake on the surface of the filter assembly and restore the air permeability of the filter assembly.

[0032] The present invention has the following beneficial effects:

[0033] 1. The anti-clogging gas filtration device and method includes filter components, jet pipes, rotating shafts, and deflection mechanisms. Multiple filter components are arranged radially inside the housing. Gas is filtered step by step along filter components with different filter hole diameters. The deflection mechanism, in conjunction with the rotating shaft, drives the filter components to deflect, so that the filter components are arranged circumferentially outside the jet pipes and form a sealed chamber. In the dust removal state, pulse gas is sprayed into the sealed chamber through the jet pipes. The reverse airflow impacts the filter components, causing deformation and generating violent vibration, which can peel off the dust filter cake on the surface of the filter components and restore the air permeability of the filter components.

[0034] 2. The anti-clogging gas filter device and filtration method involves setting up a turntable and opening a second through groove on the turntable. When the number of filter components is small, the filter components cannot form a sealed chamber after being deflected by 90°. The deflection of the turntable causes the filter components to slide along the second through groove, controlling the filter components to approach the jet pipe until a sealed chamber is formed between the filter components.

[0035] 3. The anti-clogging gas filter device and filtration method, by setting a baffle and opening a first through groove on the turntable, the rotation of the turntable causes the fixed shaft to slide in the first through groove, which can control the baffle to approach the filter assembly. The larger the diameter of the filter media pores, the smaller the distance between the baffle and the filter media. After the large-pore filter media is cleaned, the baffle can block the filter pores of the large-pore filter media, reducing the impact of the filter pores of the large-pore filter media on the sealed chamber.

[0036] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0037] Figure 1 This is an overall diagram of Embodiment 1 of the present invention;

[0038] Figure 2 This is a cross-sectional view of the filtering state in Embodiment 1 of the present invention;

[0039] Figure 3 This is an exploded view of Embodiment 1 of the present invention;

[0040] Figure 4 This is a connection diagram of the deflection mechanism and the filter assembly according to Embodiment 1 of the present invention;

[0041] Figure 5 This is a schematic diagram of the baffle and turntable structure according to Embodiment 1 of the present invention;

[0042] Figure 6 This is a cross-sectional view of the dust removal state in Embodiment 1 of the present invention;

[0043] Figure 7 This is a schematic diagram of the filter component structure of the present invention;

[0044] Figure 8 This is a schematic diagram of the valve plate structure of the present invention;

[0045] Figure 9 This is a schematic diagram of the sealing plate or slide rail according to Embodiment 1 of the present invention;

[0046] Figure 10 This is an exploded view of Embodiment 2 of the present invention;

[0047] Figure 11 This is a schematic diagram of the deflection of the filter component in Embodiment 2 of the present invention;

[0048] Figure 12This is a schematic diagram of the dust removal state in Embodiment 2 of the present invention;

[0049] Figure 13 for Figure 12 Enlarged view of area A;

[0050] Figure 14 This is a top sectional view of the second through groove in Embodiment 2 of the present invention.

[0051] In the diagram, 1. Support frame; 2. Jet pipe; 3. Filter assembly; 31. Mounting frame; 32. Filter media; 33. Rotating shaft; 331. First slider; 332. Second slider; 34. Sealing gasket; 4. Deflection mechanism; 41. Deflection gear; 42. Gear ring; 43. First cylinder; 44. First gear; 45. Rack; 5. Baffle; 51. Fixed shaft; 52. Slide groove; 6. Turntable; 61. First through groove; 62. Arc-shaped toothed plate; 63. Second gear; 64. Motor; 65. Second through groove; 651. Deflection section; 652. Moving section; 7. Valve plate; 81. Mounting frame; 82. Connecting frame; 83. Second cylinder; 10. Housing; 101. Inlet pipe; 102. Exhaust pipe; 103. Third through groove; 104. Fourth through groove; 11. Slide rail; 12. Sealing plate. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0054] The following is based on Figures 1-14 This invention describes the anti-clogging gas filtration device and filtration method provided in the embodiments of the present invention.

[0055] On the one hand, embodiments of the present invention provide an anti-clogging gas filtration device.

[0056] Example 1, please refer to Figures 1-4 The anti-clogging gas filter device includes a housing 10 and a support frame 1. The support frame 1 is located at the lower part of the housing 10 and is used to support the housing 10.

[0057] To facilitate the graded filtration of dust-laden gas, filter components 3 are provided. Multiple filter components 3 are arranged radially inside the housing 10, and the filter components 3 are arranged from large to small filter pore diameter. Adjacent filter components 3 form chambers. Gas is filtered step by step along the filter components 3 with different filter pore diameters. Dust is trapped on the surface of the filter components 3, forming a dust filter cake layer. The purified gas passes through the filter pores of the filter components 3 and is discharged from the housing 10 to participate in subsequent gas filtration. As the filter cake thickens, the pressure difference across the filter components 3 gradually increases. When the pressure difference reaches a set threshold, the dust filter cake layer on the surface of the filter components 3 needs to be cleaned.

[0058] It should be noted that the number of filter components 3 must be no less than three.

[0059] Furthermore, to facilitate the entry and exit of gas, an inlet pipe 101 and an exhaust pipe 102 are provided. The inlet pipe 101 and the exhaust pipe 102 are respectively connected to the inside of the housing 10. The dust-laden gas enters the chamber formed by the filter assembly 3 through the inlet pipe 101, and first passes through the filter assembly 3 with the largest filter hole diameter, and then passes through other filter assemblies 3 in sequence. The purified gas is discharged from the housing 10 through the exhaust pipe 102 to participate in subsequent gas filtration work.

[0060] Specifically, the filter assembly 3 located between the intake pipe 101 and the exhaust pipe 102 is a sealing plate that does not have a filtering function. It only separates the intake chamber and the exhaust chamber to prevent gas backflow.

[0061] Please refer to Figure 6 , Figure 7 To facilitate the cleaning of the filter assembly 3, an air jet pipe 2, a rotating shaft 33, and a deflection mechanism 4 are also provided. The air jet pipe 2 is located in the middle of the housing 10, and the rotating shaft 33 is installed at both ends of the filter assembly 3 along the axial direction. The rotation of the rotating shaft 33 causes the filter assembly 3 to deflect 90°, so that the filter assembly 3 is arranged circumferentially outside the air jet pipe 2 and forms a sealed chamber. The side of the filter assembly 3 covered with the dust filter cake layer is away from the air jet pipe 2. The deflection mechanism 4 is located on the upper part of the filter assembly 3. The deflection mechanism 4 can drive the rotating shaft 33 to rotate. In the cleaning state, the pulse gas is sprayed into the sealed chamber through the air jet pipe 2. The reverse airflow impacts the filter assembly 3 to deform and generate violent vibration, which can peel off the dust filter cake on the surface of the filter assembly 3 and restore the air permeability of the filter assembly 3.

[0062] It should be noted that the sealed chamber formed by the filter assembly 3 arranged around the jet pipe 2 is relatively sealed. The surface of the filter assembly 3 is covered with a dust filter cake layer, forming a relatively sealed chamber, which is beneficial to the impact of pulse gas.

[0063] Furthermore, the filter assembly 3 is also provided with a mounting frame 31, on which the filter media 32 is fixed, and sealing gaskets 34 are fixed on both sides of the mounting frame 31, with the rotating shaft 33 located at both ends of the mounting frame 31. The sealing gaskets 34 ensure that during the filtration stage, both ends of the filter assembly 3 contact the jet pipe 2 and the housing 10 respectively to achieve a seal at this point; during the dust removal stage, the sealing gaskets 34 on both sides of adjacent filter assemblies 3 contact each other to achieve a seal at the contact point.

[0064] In addition, in order to facilitate the deflection of the filter component 3, no sealing gasket 34 is provided at the upper and lower ends of the mounting frame 31, and there is a small gap. This gap is much smaller than the pore diameter of the filter material 32 and will not have a substantial impact on the filtration effect and sealing performance.

[0065] Optionally, the filter material 32 can be a filter plate or a filter cloth. For the filter plate, the instantaneous reverse impact of the pulse airflow and the elastic deformation vibration of the filter plate can peel off the dust filter cake on the surface of the filter plate. For the filter cloth, the instantaneous impact of the pulse airflow causes the filter cloth to bulge outward, generating violent elastic vibration, which directly destroys the adhesion between the dust filter cake and the filter cloth fibers.

[0066] Furthermore, a sealing plate 12 is provided below the filter assembly 3 (e.g., Figure 9 The sealing plate 12 is fixed to the housing 10 by a connecting plate. The sealing plate 12 seals the lower end of the sealed chamber to prevent a large amount of pulse gas from escaping from the lower end of the sealed chamber, thus weakening the dust removal effect of the pulse gas. It should be noted that during the dust removal stage, the deflection process of the filter assembly 3 can scrape off the dust remaining on the sealing plate 12 during the filtration stage, and the side of the filter assembly 3 covered with dust is the outside of the sealed chamber. The dust removed during dust removal will not fall onto the sealing plate 12, but will fall into the space outside the sealing plate 12.

[0067] However, the cleaning speed of the large-pore filter media 32 is faster. After the dust filter cake on the surface of the large-pore filter media 32 falls off, the pressure difference on both sides of the large-pore filter media 32 disappears, and the sealed chamber formed by the filter assembly 3 is destroyed. The reason is that the large-pore filter media 32 mainly relies on the sieving effect and surface filter cake layer to retain dust. The dust does not penetrate into the internal pores of the filter media 32, but only adheres to the surface of the filter media 32, forming a loose dust filter cake. When the pulse airflow impacts, the airflow can quickly penetrate the pores of the filter media 32 and act directly on the surface filter cake, quickly peeling off the filter cake. The dust falling path is short and the resistance is low. On the other hand, the small-pore filter media 32 retains dust not only through surface filtration, but also because fine dust can embed itself in the internal pores of the filter media 32, and may even form electrostatic adsorption or adhesive adhesion with the fibers of the filter media 32, requiring multiple pulses to clean it. After the dust filter cake on the surface of the large-pore filter material 32 falls off, the sealed chamber formed by the filter assembly 3 is destroyed. Under the impact of the pulse airflow, the deformation of the filter material 32 decreases, affecting the dust removal effect of the small-pore filter material 32.

[0068] Therefore, please refer to Figure 5 and Figure 6 Here, a baffle 5 and a turntable 6 are also provided. The baffle 5 is located on the inner wall of the housing 10 and corresponds to the position of the filter assembly 3. A fixed shaft 51 is fixed to the upper end of the baffle 5. The turntable 6 is located above the filter assembly 3. The turntable 6 has a first through groove 61 that cooperates with the fixed shaft 51. The radial lengths of the multiple first through grooves 61 on the turntable 6 are different. In the dust cleaning state, by rotating the turntable 6, the fixed shaft 51 slides in the first through groove 61, which can control the baffle 5 to move closer to the filter assembly 3. The distance between the baffle 5 and the filter assembly 3 decreases as the diameter of the filter holes of the filter assembly 3 increases (e.g., ...). Figure 6 This means that the baffle 5 is positioned closer to the large-pore filter material 32. After the large-pore filter material 32 is cleaned, the baffle 5 can block the filter pores of the large-pore filter material 32, reducing the impact of the filter pores of the large-pore filter material 32 on the sealed chamber.

[0069] Please refer to Figure 5 , Figure 7 and Figure 9 To facilitate the radial movement of the baffle 5 along the housing 10, a slide rail 11 is provided radially at the lower end of the housing 10. The two ends of the slide rail 11 are fixed to the housing 10 and the jet pipe 2 respectively, and part of the slide rail 11 is located on the sealing plate 12. The baffle 5 is provided with a groove 52 that cooperates with the slide rail 11, so that the baffle 5 can slide on the slide rail 11 and avoid the rotation of the turntable 6 from causing the baffle 5 to rotate.

[0070] To facilitate the installation of the filter assembly 3, a second slider 332 is provided on the slide rail 11 to cooperate with it. The second slider 332 is rotatably connected to the rotating shaft 33 located at the lower part of the filter assembly 3.

[0071] Please refer to Figure 4 The deflection mechanism 4 includes a deflection gear 41 and a first gear 44. The upper end of the rotating shaft 33 located on the upper part of the filter assembly 3 passes through the turntable 6, and the deflection gear 41 is sleeved on its outside. A toothed ring 42 is provided on the outside of the deflection gear 41. The rotation of the toothed ring 42 can drive the filter assembly 3 to deflect 90°. After one of the rotating shafts 33 extends to the outside of the housing 10, the first gear 44 is sleeved on its outside. A rack 45 is provided on the outside of the first gear 44. A first cylinder 43 is fixed on the upper surface of the housing 10. The piston rod end of the first cylinder 43 is fixedly connected to the rack 45. The first cylinder 43 drives the rack 45 to move. The rack 45 meshes with the first gear 44 and drives the first gear 44 to rotate 90°, thereby driving one of the deflection gears 41 to rotate. Through the toothed ring 42, all the deflection gears 41 are driven to rotate, so that the filter assembly 3 deflects 90°.

[0072] Please refer to Figure 5In order to achieve the rotation of the turntable 6, an arc-shaped toothed plate 62 is fixed on the upper surface of the turntable 6. The upper end of the arc-shaped toothed plate 62 passes through the housing 10. A third through groove 103 that cooperates with the arc-shaped toothed plate 62 is opened on the upper surface of the housing 10. A second gear 63 is provided outside the arc-shaped toothed plate 62. A motor 64 that can drive the central shaft of the second gear 63 to rotate is provided above the second gear 63.

[0073] Please refer to Figure 8 It is also equipped with a valve plate 7 and a connecting frame 82. The valve plate 7 is located at the lower end of the housing 10 and is used to close the housing 10. One end of the connecting frame 82 is fixed on the valve plate 7. A mounting frame 81 is fixed on the support frame 1. The connecting frame 82 is rotatably mounted on the mounting frame 81. A second cylinder 83 is rotatably mounted on the support frame 1. The piston rod end of the second cylinder 83 is hinged to the connecting frame 82. During the dust cleaning stage, the second cylinder 83 is activated to push the connecting frame 82 to deflect, so that the valve plate 7 opens.

[0074] During use, in the filtration stage: Dust-laden gas enters the chamber formed by the filter assembly 3 through the air inlet pipe 101, and first passes through the filter assembly 3 with the largest filter hole diameter. The gas is filtered step by step along the filter assembly 3 with different filter hole diameters. Dust is trapped on the surface of the filter assembly 3, forming a dust filter cake layer. The purified gas passes through the filter holes of the filter assembly 3 and is finally discharged from the housing 10 through the exhaust pipe 102 to participate in the subsequent gas filtration work. As the filter cake thickens, the pressure difference on both sides of the filter assembly 3 gradually increases. When the pressure difference reaches the set threshold, the dust filter cake layer on the surface of the filter assembly 3 needs to be cleaned.

[0075] Dust removal stage: First, the second cylinder 83 is activated to push the connecting frame 82 to deflect, causing the valve plate 7 to open; simultaneously, the first cylinder 43 is activated to drive the rack 45 to move, causing the first gear 44 to rotate 90°, which in turn causes one of the deflecting gears 41 to rotate, driving all the deflecting gears 41 to rotate through the gear ring 42, causing the filter assembly 3 to deflect 90°, arranging it circumferentially outside the jet pipe 2 and forming a sealed chamber. The side of the filter assembly 3 covered with the dust filter cake layer is away from the jet pipe 2. The sealing plate 12 seals the lower end of the sealed chamber to prevent a large amount of pulse gas from escaping from the lower end of the sealed chamber, thus weakening the dust removal force of the pulse gas; then, the motor 64 is activated to drive the second gear 63 to rotate. The second gear 63 and the arc-shaped toothed plate 62 generate a meshing force to drive the turntable 6 to deflect, causing the fixed shaft 51 to slide in the first through groove 61, which can control the baffle 5 to move closer to the filter assembly 3. The larger the diameter of the filter pores of the filter material 32, the smaller the distance between the baffle 5 and it (e.g., Figure 6After the large-pore filter material 32 is cleaned, the baffle 5 can block the filter pores of the large-pore filter material 32, reducing the impact of the filter pores of the large-pore filter material 32 on the sealed chamber. Finally, pulse gas is introduced into the sealed chamber through the jet pipe 2. The reverse airflow impacts the filter material 32 to deform and generate violent vibration, which can peel off the dust filter cake on the surface of the filter material 32. Under the action of gravity, the dust falls into the bottom of the shell 10 and is discharged, completing the cleaning and restoring the air permeability of the filter material 32.

[0076] Example 2, please refer to Figures 10-14 The difference between this embodiment and Embodiment 1 is that a second through groove 65 is provided. To facilitate the formation of sealed chambers after different numbers of filter components 3 are deflected 90° under the action of the deflection mechanism 4, a second through groove 65 is also provided on the turntable 6. The upper end of the rotating shaft 33 located above the filter component 3 passes through the second through groove 65. By rotating the turntable 6, the filter component 3 slides along the second through groove 65, which can control the filter component 3 to move radially closer to the jet pipe 2. When the number of filter components 3 is small (e.g., three or four), after being deflected 90° under the action of the deflection mechanism 4, the filter components 3 are arranged circumferentially outside the jet pipe 2, but a sealed chamber cannot be formed (e.g., ...). Figure 11 ), control the filter assembly 3 to be close to the jet pipe 2 until a sealed chamber is formed between the filter assemblies 3 (such as Figure 12 ).

[0077] Optionally, the radial length of the second through groove 65 on the turntable 6 is different, so that the moving distance of the filter assembly 3 is different. The radial length of the second through groove 65 on the turntable 6 can be determined according to the number of filter assemblies 3, so that the filter assembly 3 can form a sealed chamber after moving radially.

[0078] Further, please refer to Figures 12-14 To reduce the impact of pulsed gas impact on the structural stability of the sealed chamber, a first slider 331 that mates with the second through groove 65 is sleeved on the upper rotating shaft 33 of the filter assembly 3. The first slider 331 slides within the second through groove 65 by rotating the turntable 6. The first slider 331 has a polygonal structure, and the second through groove 65 includes a deflection section 651 and a moving section 652 (e.g., ...). Figure 14When the deflection mechanism 4 controls the deflection of the filter assembly 3, the first slider 331 is located in the deflection section 651, which can accommodate the first slider 331 deflecting 90°. Then, the turntable 6 deflects, causing the first slider 331 to slide in the second through groove 65. At this time, the first slider 331 is located in the moving section 652. After deflecting 90°, the first slider 331 can move along the moving section 652, and the first slider 331 always maintains its deflected angle. During the dust removal stage, the filter assembly 3 approaching the jet pipe 2 will cause the first gear 44 to separate from the rack 45. Consequently, during the dust removal stage, the filter assembly 3 may be subjected to pulse gas impact, which may cause its angle to deflect uncontrollably, damaging the structural stability of the sealed chamber. The cooperative arrangement of the polygonal first slider 331 and the second through groove 65 stabilizes the angle of the filter assembly 3.

[0079] In addition, to facilitate the movement of the filter assembly 3 without being affected by the housing 10, a fourth through groove 104 is provided on the housing 10 (e.g., Figure 10 The upper end of the rotating shaft 33 located on the upper part of the filter assembly 3 passes through the fourth through groove 104, and the rotating shaft 33 can rotate or slide within the fourth through groove 104.

[0080] In use, when the number of filter components 3 is small (such as three or four), the filter components 3 cannot form a sealed chamber solely due to the deflection action of the deflection mechanism 4 (such as...). Figure 11 After the filter assembly 3 deflects 90°, the drive turntable 6 deflects the control baffle 5 closer to the filter assembly 3, while the filter assembly 3 slides along the second through groove 65, controlling the filter assembly 3 to approach the jet pipe 2, until a sealed chamber is formed between the filter assemblies 3 (e.g., Figure 12 ).

[0081] On the other hand, embodiments of the present invention also provide a method for preventing clogged gas filtration, comprising the following steps:

[0082] In the filtration stage, the gas passes through multiple filter components 3 arranged in descending order of filter hole diameter. The filter components 3 perform graded filtration of dust in the gas.

[0083] During the dust removal stage, the deflection mechanism 4 drives the filter assembly 3 to deflect 90°, so that the filter assembly 3 is arranged circumferentially outside the jet pipe 2 and forms a sealed chamber. Pulsed gas is sprayed into the sealed chamber through the jet pipe 2, which can peel off the dust filter cake on the surface of the filter assembly 3 and restore the air permeability of the filter assembly 3.

Claims

1. A clog-resistant gas filter device, comprising a housing (10), characterized in that, Also includes: The jet pipe (2) is located in the middle of the housing (10); The filter assembly (3) is arranged radially around the jet pipe (2), and the gas is filtered step by step along the filter assembly (3) with different filter hole diameters. A rotating shaft (33) is installed at both ends of the filter assembly (3). The rotating shaft (33) rotates and drives the filter assembly (3) to deflect by 90°, so that the filter assembly (3) is arranged circumferentially outside the jet pipe (2) and forms a sealed chamber. Deflection mechanism (4), which is located on the upper part of the filter assembly (3), can drive the rotating shaft (33) to rotate; In the dust removal state, pulse gas is sprayed into the sealed chamber through the jet pipe (2), which can peel off the dust filter cake on the surface of the filter assembly (3) and restore the air permeability of the filter assembly (3); The anti-clogging gas filter also includes: Baffle (5), the baffle (5) is located on the inner wall of the housing (10) and corresponds to the position of the filter assembly (3). A fixed shaft (51) is fixed at the upper end of the baffle (5). Turntable (6) is located above filter assembly (3). The turntable (6) has a first through groove (61) that cooperates with the fixed shaft (51). The radial lengths of the multiple first through grooves (61) on the turntable (6) are different. In the dust removal state, the fixed shaft (51) slides in the first through groove (61) by rotating the turntable (6), which can control the baffle (5) to move closer to the filter assembly (3). The distance between the baffle (5) and the filter assembly (3) decreases as the diameter of the filter holes of the filter assembly (3) increases. The turntable (6) is also provided with a second through groove (65). The upper end of the rotating shaft (33) located on the upper part of the filter assembly (3) passes through the second through groove (65). By rotating the turntable (6), the filter assembly (3) slides along the second through groove (65), which can control the filter assembly (3) to move radially closer to the jet pipe (2). This makes it easy for different numbers of filter assemblies (3) to form a sealed chamber after being deflected 90° by the deflection mechanism (4). The lower end of the housing (10) is provided with a slide rail (11) in the radial direction. The two ends of the slide rail (11) are fixed on the housing (10) and the jet pipe (2) respectively. The baffle (5) is provided with a groove (52) that cooperates with the slide rail (11) so that the baffle (5) can slide on the slide rail (11). The slide rail (11) is provided with a second slider (332) that cooperates with it. The second slider (332) is rotatably connected to the rotating shaft (33) located at the lower part of the filter assembly (3). The filter assembly (3) also includes a mounting frame (31), on which filter media (32) is fixed, and sealing gaskets (34) are fixed on both sides of the mounting frame (31). The rotating shaft (33) is located at both ends of the mounting frame (31). The anti-clogging gas filter also includes an air inlet pipe (101) and an exhaust pipe (102). The air inlet pipe (101) and the exhaust pipe (102) are respectively connected to the inside of the housing (10). The filter assembly (3) located between the air inlet pipe (101) and the exhaust pipe (102) is a sealing plate and does not have a filtering function. The filter assembly (3) has a first slider (331) fitted on the upper shaft (33) that cooperates with the second through groove (65). The first slider (331) slides in the second through groove (65) by rotating the turntable (6). The first slider (331) has a polygonal structure. The second through groove (65) includes a deflection section (651) and a moving section (652).

2. The anti-clogging gas filter device according to claim 1, characterized in that, The deflection mechanism (4) includes: A deflection gear (41) is sleeved on the outside of the rotating shaft (33). A toothed ring (42) is provided on the outside of the deflection gear (41). The rotation of the toothed ring (42) can drive the filter assembly (3) to deflect 90°. The first gear (44) has a shaft (33) extending to the outside of the housing (10), and the first gear (44) is fitted on its outside. The first gear (44) has a rack (45) on its outside. The upper surface of the housing (10) is fixed with a first cylinder (43), and the piston rod end of the first cylinder (43) is fixedly connected to the rack (45).

3. The anti-clogging gas filter device according to claim 1, characterized in that, The turntable (6) has an arc-shaped toothed plate (62) fixed on its upper surface. A second gear (63) is provided on the outside of the arc-shaped toothed plate (62). A motor (64) is provided above the second gear (63) to drive the central shaft of the second gear (63) to rotate.

4. The anti-clogging gas filter device according to claim 1, characterized in that, Also includes: Support frame (1), which is located at the lower part of the housing (10) and is used to support the housing (10).

5. The anti-clogging gas filter device according to claim 4, characterized in that, Also includes: Valve plate (7), which is located at the lower end of housing (10) and is used to close housing (10). A connecting frame (82) is fixed at one end to a valve plate (7). A mounting frame (81) is fixed on a support frame (1). The connecting frame (82) is rotatably mounted on the mounting frame (81). A second cylinder (83) is rotatably mounted on the support frame (1). The piston rod end of the second cylinder (83) is hinged to the connecting frame (82).

6. A method for preventing clogging gas filtration, applicable to the anti-clogging gas filtration device according to any one of claims 1-5, characterized in that, Includes the following steps: In the filtration stage, the gas passes through multiple filter components (3) arranged in descending order of filter hole diameter. The filter components (3) perform graded filtration of dust in the gas. During the dust removal stage, the deflection mechanism (4) drives the filter assembly (3) to deflect 90°, so that the filter assembly (3) is arranged around the outside of the jet pipe (2) and forms a sealed chamber. The pulse gas is sprayed into the sealed chamber through the jet pipe (2), which can peel off the dust filter cake on the surface of the filter assembly (3) and restore the air permeability of the filter assembly (3).

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