A bag filter dust collector for biomass boilers

Abstract

This invention discloses a baghouse dust collector for a biomass boiler, comprising a dust collection chamber with a partition inside, on which multiple filter bags are arranged in an array, and an air pump installed outside the dust collection chamber. It also includes: a swinging component hinged to the inner wall of the dust collection chamber, with a diverter pipe connected to its free end, and multiple nozzles mounted on the diverter pipe, which is airtightly connected to the air pump; and a drive assembly for driving the swinging component to rotate. During normal flue gas filtration by the filter bags, the drive assembly drives the swinging component to rotate upwards, causing the diverter pipe to move the nozzles to a position avoiding obstruction of the rising airflow above the filter bags. When the filter bags require cleaning, the drive assembly drives the swinging component to rotate downwards, causing the diverter pipe to move the nozzles to a working position close to and directly facing the top of the filter bags. At this point, the nozzles are pointing downwards towards the inside of the filter bags, allowing for normal cleaning.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, specifically to a bag filter dust collector for a biomass boiler. Background Technology

[0002] Baghouse dust collectors, also known as bag filters, are dry dust filtration devices suitable for collecting fine, dry, non-fibrous dust. The filter bags are made of woven filter cloth or non-woven felt, utilizing the filtration effect of the fibrous fabric to filter dust-laden gas. When the dust-laden gas enters the baghouse dust collector, larger, heavier dust particles settle due to gravity and fall into the ash hopper. Gas containing finer dust particles is purified by trapping the dust as it passes through the filter media. Biomass boilers, which use biomass energy as fuel, typically produce flue gas containing a large amount of dust particles. Direct emission of this gas easily pollutes the atmosphere; baghouse dust collectors are well-suited for this purpose.

[0003] Patent document CN106334382A discloses a negative pressure low-pressure pulse bag filter dust collector for treating boiler flue gas, relating to the field of flue gas treatment technology. It includes an air inlet duct, an air outlet duct, a clean air box, a dust filtration system, a pulse jet cleaning system, an ash storage and unloading system, and a guide plate. The guide plate is located above the air inlet duct. The dust filtration system consists of filter bags, a perforated plate for mounting the filter bags, and a bag cage supporting the filter bags. The clean air box is located above the filter bags. The ash storage and unloading system consists of an ash hopper and an ash unloading valve, located below the filter bags. The pulse jet cleaning system consists of an electromagnetic pulse valve, an air manifold, a cylinder lifting valve, a jet pipe, and jet nozzles, with the jet nozzles pointing downwards towards the filter bag openings. This invention, through a rational design, adds a guide plate above the air inlet duct to guide the dust-laden gas downwards and then upwards, allowing the dust-laden gas to fully contact the filter bags under negative pressure, achieving an ideal filtration effect. The pulse jet cleaning system can easily remove dust from the filter bags.

[0004] In the manufacturing of existing products as described in the aforementioned patent, an air jet structure is installed above the dust collection unit of the dust collector, i.e. above the bag filter structure, for reverse airflow through the bag filter to allow the filtered particles to fall off. However, during normal filtration operation, this air jet structure also blocks the bag filter, easily obstructing the upward airflow. This causes finer particles remaining in the airflow to collide and fall back into the bag filter. Therefore, there is an urgent need for a biomass boiler bag filter dust collector to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a bag filter dust collector for biomass boilers to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A bag filter dust collector for a biomass boiler includes a dust collection chamber with a partition inside. Multiple filter bags are arranged in an array on the partition. An air pump is installed outside the dust collection chamber. The device also includes: a swinging component hinged to the inner wall of the dust collection chamber, with a diverter pipe connected to its free end. Multiple nozzles are installed on the diverter pipe, which is airtightly connected to the air pump; and a drive assembly for driving the swinging component to rotate, thereby moving the diverter pipe to a working position directly above the filter bags or to an avoidance position above the filter bags. When the diverter pipe is in the working position, the nozzles are pointing downwards towards the inside of the filter bags.

[0008] Preferably, the air pump is provided with an air pipe that extends through into the dust removal chamber, and the swinging member is provided with a sleeve that is rotatably sleeved on the air pipe.

[0009] Preferably, both ends of the shunt tube are provided with swinging components, and the swinging component connected to one side of the air tube has a cavity inside so that the air tube and the shunt tube can communicate.

[0010] Preferably, the drive assembly includes a first rack movably disposed inside the dust removal chamber, a first gear coaxially sleeved on the sleeve and meshing with the first rack, and a telescopic drive unit for driving the first rack to move is installed on the inner wall of the dust removal chamber.

[0011] Preferably, the upper end of the bag tube is rotatably provided with a flap, and the flap has an air inlet hole that matches the nozzle. The rotation of the flap is linked to the rotation of the sleeve through a linkage component. When the diverter is in the working position, the flap rotates to a horizontal state to cover the upper end of the bag tube, and the nozzle faces downward and corresponds to the air inlet hole. When the diverter is in the avoidance position, the flap rotates to a vertical state to fully open the upper end of the bag tube.

[0012] Preferably, the linkage component includes a second rack movably disposed on the partition, a second gear coaxially connected to one end of the rotating shaft of the flip cover and meshing with the second rack, a linkage sleeve threaded onto the outer side of the sleeve, and the linkage sleeve being fixedly connected to the second rack via a linkage rod.

[0013] Preferably, the swinging component is elastically rotatably connected to the sleeve, and the inner wall of the dust removal chamber is provided with a limiting component that hinders the rotation of the swinging component. After the swinging component drives the diversion pipe to switch to the working position, the swinging component is limited by the limiting component, while the sleeve continues to rotate, so as to link the flip cover to rotate to a horizontal state, and the nozzle is inserted into the air inlet.

[0014] Preferably, the swinging member is provided with a neck ring that is sleeved on the trachea, and the sleeve is provided with a sealing ring that is coaxially sleeved on the neck ring. The inner wall of the sealing ring is connected to the neck ring by a coil spring.

[0015] Preferably, a sealing assembly is provided between the neck ring and the sealing ring, and the sealing assembly is triggered by the relative rotation of the neck ring and the sealing ring to enhance the sealing between the swinging component and the trachea.

[0016] Preferably, the sealing assembly includes a convex ring at the end of the trachea and a transition ring rotatably connected to the inner side of the sealing ring, a coil spring connecting the sealing ring and the transition ring, and the transition ring being spirally sleeved on the neck ring.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This biomass boiler bag filter dust collector, through the manufacture and installation of a swinging component and a drive assembly, allows the drive assembly to rotate the swinging component upwards during normal flue gas filtration, i.e., when upward airflow is generated inside the bag cylinder. This causes the diverter pipe to carry the nozzle to a position that avoids obstructing the upward airflow. When the bag cylinder needs cleaning, the drive assembly rotates the swinging component downwards, causing the diverter pipe to carry the nozzle to a working position close to and directly facing the top of the bag cylinder. At this time, the nozzle is aimed downwards at the inside of the bag cylinder, allowing for normal cleaning operations.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall internal structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 For the present invention Figure 1 Enlarged structural diagram at point B;

[0025] Figure 4 This is a schematic diagram of the overall front cross-sectional structure of the present invention when the diverter tube is in the avoidance position;

[0026] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point C;

[0027] Figure 6 This is a schematic diagram of the overall front cross-sectional structure of the diversion tube of the present invention in its working position;

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point D;

[0029] Figure 8 This is a schematic diagram of the internal structure of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Dust collection chamber; 2. Partition plate; 3. Bag cylinder; 4. Air pump; 5. Swinging component; 6. Diverter pipe; 7. Nozzle; 8. Air pipe; 9. Sleeve; 10. First rack; 11. First gear; 12. Telescopic drive unit; 13. Flip cover; 14. Air inlet; 15. Second rack; 16. Second gear; 17. Linkage sleeve; 18. Linkage rod; 19. Limiting component; 20. Neck ring; 21. Sealing ring; 22. Coil spring; 23. Convex ring; 24. Transition ring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0033] Please see Figure 1-8 This invention provides a bag filter dust collector for a biomass boiler, comprising a dust collection chamber 1, a partition 2 inside the dust collection chamber 1, a plurality of filter bags 3 arranged in an array on the partition 2, an air pump 4 installed outside the dust collection chamber 1, and further comprising: a swing member 5, which is hinged to the inner wall of the dust collection chamber 1, and a diversion pipe 6 connected to its free end, a plurality of nozzles 7 being provided on the diversion pipe 6, and the diversion pipe 6 being airtightly connected to the air pump 4; and a drive assembly for driving the swing member 5 to rotate, thereby moving the diversion pipe 6 to a working position directly above the filter bags 3 or to an avoidance position avoiding the top of the filter bags 3. When the diversion pipe 6 is in the working position, the nozzles 7 are pointing downwards toward the inside of the filter bags 3.

[0034] Specifically, the upper end of the dust removal bin 1 is in the shape of a rectangular box, and a compartment is provided on one side. The lower end of the compartment is connected to the main body of the dust removal bin 1. The smoke inlet of the dust removal bin 1 is arranged on the side wall of the compartment, so that the flue gas is guided to flow upward from the bottom of the cloth bag cylinder 3. The lower end of the dust removal bin 1 is in a funnel shape, and a switching valve is provided at the bottom leak port. When the dust removal work is carried out inside the dust removal bin 1, the switching valve remains closed, and when the cloth bag cylinder 3 is cleaned inside the dust removal bin 1 or after cleaning, the switching valve is opened. The partition plate 2 is arranged near the upper end of the dust removal bin 1. The partition plate 2 divides the inside of the dust removal bin 1 into a smoke-free area on the upper side and a dust removal area on the lower side. The exhaust port of the dust removal bin 1 is arranged on the side wall of the smoke-free area. The cloth bag cylinders 3 are arranged in a rectangular array, and can be preferably arranged in 4×4, 4×5, 5×5, etc. The upper end of the cloth bag cylinder 3 is open. The cloth bag cylinder 3 includes a framework and a cloth bag fixedly sleeved on the framework. The framework is fixed on the partition plate 2. The inside of the cloth bag is separated from the dust removal area and is connected to the smoke-free area. The compartment of the dust removal bin 1 forms a step outside the dust removal bin 1. The air pump 4 is fixedly installed on the step. An air pipe 8 that penetrates into the dust removal bin 1 is provided on the air pump 4. A sleeve 9 that is rotationally sleeved on the air pipe 8 is synchronously rotated on the swing member 5. The sleeve 9 corresponds to the rotating shaft of the swing member 5, so that the swing member 5 can smoothly rotate around the air pipe 8. Multiple air pipes 8 are provided and are independently controlled for jetting. A shunt pipe 6 is arranged corresponding to a row of cloth bag cylinders 3. Multiple rows of cloth bag cylinders 3 are matched with multiple shunt pipes 6. The air pipes 8 are connected to the shunt pipes 6 one by one. Multiple nozzles 7 are equidistantly arranged on the shunt pipe 6. The interval between adjacent nozzles 7 is the same as the interval between adjacent cloth bag cylinders 3 in a row of cloth bag cylinders 3 corresponding to the shunt pipe 6. Swing members 5 are provided at both ends of the shunt pipe 6. A cavity is provided inside the swing member 5 connected to one side of the air pipe 8 to connect the air pipe 8 and the shunt pipe 6. A convex ring 23 is provided at the end of the air pipe 8 to be limited in the cavity. The axial direction of the air pipe 8 is parallel to the axial direction of the shunt pipe 6. The rotating shaft of the swing member 5 coincides with the axial direction of the air pipe 8. The air pipe 8 corresponds to the center of the distribution direction of a row of cloth bag cylinders 3 connected to it. The shunt pipe 6 and the two swing members 5 form a "C" - shaped structure. The swing member 5 rotates in the vertical plane, so that the shunt pipe 6 makes an arc movement in the vertical plane. The rotation range of the swing member 5 is preferably 90°. Specifically, when the swing member 5 rotates downward to drive the shunt pipe 6 to move to the lowest height of the arc, at this time, the shunt pipe 6 is closest to the cloth bag cylinder 3, and the nozzle 7 faces downward corresponding to the cloth bag cylinder 3, which is the working position of the shunt pipe 6. When the swing member 5 rotates upward to drive the shunt pipe 6 to move, the "C" - shaped structure is horizontally arranged, and the shunt pipe 6 deviates from the upper part of the cloth bag cylinder 3 by the maximum distance in the horizontal direction to avoid blocking the upper part of the cloth bag cylinder 3, which is the avoidance position of the shunt pipe 6. The driving component drives one side swing member 5 to rotate, and the other side swing member 5 rotates accordingly.In practical use, during the normal flue gas filtration process of the bag filter 3, when an upward airflow is generated inside the bag filter 3, the drive component drives the swinging component 5 to rotate upward, so that the diverter pipe 6 carries the nozzle 7 to a position that avoids blocking the upward airflow above the bag filter 3. When the bag filter 3 needs cleaning, the drive component drives the swinging component 5 to rotate downward, so that the diverter pipe 6 carries the nozzle 7 to a working position that is close to and directly facing the top of the bag filter 3. At this time, the nozzle 7 is pointing downward toward the inside of the bag filter 3, and the cleaning work can be carried out normally.

[0035] Compared with the prior art, the biomass boiler bag filter dust collector proposed in this embodiment of the invention, by setting up a swinging component 5 and a driving component, can rotate the swinging component 5 upward during the normal flue gas filtration process of the bag cylinder 3, that is, when an upward airflow is generated inside the bag cylinder 3, so that the diverter pipe 6 carries the nozzle 7 to a position that avoids blocking the upward airflow above the bag cylinder 3. When the bag cylinder 3 needs to be cleaned, the driving component drives the swinging component 5 downward to rotate the diverter pipe 6 carrying the nozzle 7 to a working position that is close to and directly facing the top of the bag cylinder 3. At this time, the nozzle 7 is pointing downward toward the inside of the bag cylinder 3, and the cleaning work can be carried out normally.

[0036] As a preferred technical solution in this embodiment, the driving component includes a first rack 10 movably disposed inside the dust collection chamber 1, a first gear 11 coaxially sleeved on the sleeve 9 and meshing with the first rack 10, and a telescopic driving unit 12 installed on the inner wall of the dust collection chamber 1 for driving the first rack 10 to move. Specifically, the extension direction of the first rack 10 is perpendicular to the axial direction of the sleeve 9. The first rack 10 can span across multiple air pipes 8 and connect to the corresponding first gear 11 on the sleeve 9, thereby controlling the synchronous movement and switching position of each row of diverter pipes 6. The telescopic driving unit 12 is preferably a cylinder or an electric telescopic rod. Under the control of the servo system, it actively controls the movement of the first rack 10, thereby meshing with the first gear 11 to drive the sleeve 9 to rotate. The swing member 5 rotates with the sleeve 9 to realize the movement and switching position of the diverter pipes 6. A support block is provided on the inner wall of the dust collection chamber 1, and the first rack 10 is slidably connected to the support block through a keyway structure to obtain support and guidance.

[0037] In the existing bag cylinder 3, its top is completely open. When the nozzle 7 blows air downwards into the bag cylinder 3, the airflow easily overflows from the fully open top of the bag cylinder 3, resulting in a mediocre airflow cleaning effect from the nozzle 7. The following embodiments are proposed to solve this problem.

[0038] In another embodiment of the present invention, a flap 13 is rotatably provided on the upper end of the bag tube 3. The flap 13 has an air inlet 14 that matches the nozzle 7. The rotation of the flap 13 is linked to the rotation of the sleeve 9 via a linkage assembly. When the diverter 6 is in the working position, the flap 13 rotates to a horizontal position to block the upper end of the bag tube 3, and the nozzle 7 faces downwards corresponding to the air inlet 14. When the diverter 6 is in the avoidance position, the flap 13 rotates to a vertical position to fully open the upper end of the bag tube 3. Specifically, the pivot of the flap 13 is located inside the bag tube 3, so that when the flap 13 is in a horizontal position, its entire structure blocks the upper opening of the bag tube 3 from the inside. The flap 13 is circular, with its outer diameter matching the inner diameter of the bag tube 3. The thickness of the flap 13 is preferably 2-5 mm. When the flap 13 is in a vertical position, its direction is aligned with the rising air inside the bag tube 3. When the airflow is consistent, the impact on the rising airflow is minimal. The air inlet 14 is offset from the center of the flip cover 13, which reduces the possibility of interference between the moving diverter pipe 6 carrying the nozzle 7 and the flip cover 13 during the linkage rotation of the flip cover 13 and the sleeve 9. The process of the diverter pipe 6 switching from the avoidance position to the working position corresponds to the flip cover 13 switching from a vertical state to a horizontal state. During the above process, the diverter pipe 6 and the flip cover 13 do not interfere with each other. When the diverter pipe 6 is in the avoidance position, the flip cover 13 is in a vertical state, which allows the rising airflow in the bag cylinder 3 to be unobstructed and flow smoothly. When the diverter pipe 6 is in the working position, the flip cover 13 is in a horizontal state, and the nozzle 7 corresponds to the air inlet 14. The nozzle 7 blows air into the bag cylinder 3 through the air inlet 14 to clean the adhering dust, so that the opening of the bag cylinder 3 is no longer easy to overflow airflow, thus improving the air jet cleaning effect.

[0039] As a preferred technical solution of this embodiment, the linkage component includes a second rack 15 movably disposed on the partition 2, a second gear 16 coaxially connected to one end of the rotating shaft of the flip cover 13 and meshing with the second rack 15, and a linkage sleeve 17 threadedly sleeved on the outside of the sleeve 9. The linkage sleeve 17 is fixedly connected to the second rack 15 through the linkage rod 18. Specifically, the second rack 15 is slidably connected to the upper side of the partition 2 through a keyway structure, thereby limiting the movement direction of the second rack 15 to be perpendicular to the axial direction of the rotating shaft of the flip cover 13 and consistent with the axial direction of the sleeve 9. The second rack 15 extends to each flip cover 13 on a row of cloth bag tubes 3 corresponding to the diversion pipe 6 and is driven by the second gear 16. When the sleeve 9 rotates, on the one hand, it drives the swing member 5 to rotate to realize the position switching of the diversion pipe 6. On the other hand, through the threaded feed action with the linkage sleeve 17, the linkage sleeve 17 moves axially and drives the second rack 15 to move through the linkage rod 18. The second rack 15 meshes with the second gear 16 to realize the switching of the rotation state of the flip cover 13.

[0040] In another embodiment of the present invention, the swing member 5 is elastically rotatably connected to the sleeve 9. The inner wall of the dust removal chamber 1 is provided with a limiting member 19 that hinders the rotation of the swing member 5. After the swing member 5 drives the diversion pipe 6 to switch to the working position, the swing member 5 is limited by the limiting member 19, while the sleeve 9 continues to rotate, so that the flip cover 13 rotates to a horizontal state and the nozzle 7 is inserted into the air inlet 14. Specifically, the swing member 5 is provided with a neck ring 20 sleeved on the air pipe 8, and the sleeve 9 is provided with a sealing ring 21 coaxially sleeved outside the neck ring 20. The inner wall of the sealing ring 21 is connected to the neck ring 20 through a coil spring 22. The limiting member 19 is located below the air pipe 8. When the swing member 5 abuts against the limiting member 19, the diversion pipe 6 is in the corresponding working position. In actual use, during the process of the swing member 5 rotating downward to switch the diverter tube 6 to the working position, when the diverter tube 6 reaches the working position, the swing member 5 is blocked by the limiting member 19 and cannot continue to rotate. At the same time, due to the elastic rotational connection between the swing member 5 and the sleeve 9, the sleeve 9 resists the elastic force between itself and the swing member 5 and continues to rotate relative to the swing member 5. That is, the coil spring 22 is stressed and stores elastic potential energy, which is why the flip cover 13 rotates to the horizontal state. In other words, the time for the flip cover 13 to rotate to the horizontal state is delayed compared to the time for the diverter tube 6 to reach the working position. Thus, the diverter tube 6 carries the nozzle 7 to the working position first, and then the flip cover 13 rotates to make the air inlet 14 fit outside the nozzle 7, that is, the nozzle 7 is inserted into the air inlet 14. In this way, under the condition of avoiding interference, the nozzle 7 is inserted into the air inlet 14 to spray air, which can prevent the overflow of gas to a greater extent and further improve the air spray cleaning effect. Conversely, during the rotation of the sleeve 9, since the coil spring 22 is in a compressed state, the flip cover 13, which is directly linked to the sleeve 9, rotates first to disengage the air inlet 14 from the nozzle 7. Then the swing member 5 rotates with the sleeve 9, that is, the diverter pipe 6 begins to rotate and switch to the avoidance position.

[0041] As a further preferred technical solution of this embodiment, a sealing assembly is provided between the neck ring 20 and the sealing ring 21. The sealing assembly is triggered by the relative rotation of the neck ring 20 and the sealing ring 21 to enhance the sealing between the swinging member 5 and the air pipe 8. Specifically, due to the rotational connection between the swinging member 5 and the air pipe 8, there is a possibility of air leakage in the connection gap between the swinging member 5 and the air pipe 8 under the action of instantaneous air jet. This embodiment solves this problem. The sealing assembly includes a convex ring 23 provided at the end of the air pipe 8 and a transition ring 24 rotatably connected to the inner side of the sealing ring 21. A coil spring 22 is connected between the sealing ring 21 and the transition ring 24. The transition ring 24 is spirally sleeved on the neck ring 20. The convex ring 23 is embedded in the cavity of the swinging member 5. The transition ring 24 is embedded in the inner side of the sealing ring 21 and is axially fixed relative to the sealing ring 21, while its axial rotation is restricted by the elasticity of the coil spring 22. In actual use, when the oscillating element 5 rotates, causing the diverter tube 6 to switch to the working position, the sleeve 9 continues to rotate, resulting in relative rotation with the oscillating element 5 and the neck ring 20. This triggers the deformation of the coil spring 22. Due to the elastic force generated by the deformation of the coil spring 22, the transition ring 24 is forced to rotate relative to the neck ring 20. The direction of this rotation triggers the helical transmission between the transition ring 24 and the neck ring 20, causing the neck ring 20 to move away from the sleeve 9. This makes the inner wall of the cavity of the oscillating element 5 more tightly attached to the convex ring 23, thereby strengthening the sealing between the neck ring 20 and the sealing ring 21, preventing air leakage. Furthermore, under the elastic force, after the sleeve 9 rotates, it can automatically recover and relax, without hindering the subsequent rotation of the oscillating element 5 relative to the air tube 8.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A bag filter dust collector for a biomass boiler, comprising a dust collection chamber (1), a partition (2) disposed inside the dust collection chamber (1), a plurality of filter bags (3) arranged in an array on the partition (2), and an air pump (4) installed outside the dust collection chamber (1), characterized in that, Also includes: The swinging component (5) is hinged to the inner wall of the dust removal chamber (1), and its free end is connected to a diversion pipe (6). Multiple nozzles (7) are provided on the diversion pipe (6), and the diversion pipe (6) is airtightly connected to the air pump (4). The drive assembly is used to drive the swing member (5) to rotate so as to move the diverter tube (6) to a working position directly above the bag cylinder (3) or to an avoidance position above the bag cylinder (3). When the diverter tube (6) is in the working position, the nozzle (7) is pointing downward toward the inside of the bag cylinder (3). The air pump (4) is provided with an air pipe (8) that extends into the dust removal chamber (1), and the swinging part (5) is provided with a sleeve (9) that is rotatably sleeved on the air pipe (8). The drive assembly includes a first rack (10) movably disposed inside the dust removal chamber (1), a first gear (11) coaxially sleeved on the sleeve (9) and meshing with the first rack (10), and a telescopic drive unit (12) for driving the first rack (10) to move is installed on the inner wall of the dust removal chamber (1). The upper end of the bag tube (3) is rotatably provided with a flap (13). The flap (13) is provided with an air inlet (14) that matches the nozzle (7). The rotation of the flap (13) is linked to the rotation of the sleeve (9) through the linkage component. When the diverter (6) is in the working position, the flap (13) rotates to the horizontal state to cover the upper end of the bag tube (3), and the nozzle (7) is downward and corresponds to the air inlet (14). When the diverter (6) is in the avoidance position, the flap (13) rotates to the vertical state to make the upper end of the bag tube (3) fully open. The linkage assembly includes a second rack (15) movably mounted on the partition (2), a second gear (16) coaxially connected to one end of the rotating shaft of the flip cover (13) and meshing with the second rack (15), and a linkage sleeve (17) threaded onto the outer side of the sleeve (9), and the linkage sleeve (17) is fixedly connected to the second rack (15) through the linkage rod (18).

2. The biomass boiler bag filter dust collector according to claim 1, characterized in that, Both ends of the diverter tube (6) are provided with swinging parts (5), and the swinging parts (5) connected to one side of the air pipe (8) have a cavity inside so that the air pipe (8) and the diverter tube (6) can communicate.

3. The biomass boiler bag filter dust collector according to claim 1, characterized in that, The swinging component (5) is elastically rotatably connected to the sleeve (9). The inner wall of the dust removal chamber (1) is provided with a limiting component (19) that prevents the swinging component (5) from rotating. After the swinging component (5) drives the diversion pipe (6) to switch to the working position, the swinging component (5) is limited by the limiting component (19), while the sleeve (9) continues to rotate so that the flip cover (13) rotates to a horizontal state and the nozzle (7) is inserted into the air inlet (14).

4. The biomass boiler bag filter dust collector according to claim 3, characterized in that, The swing member (5) is provided with a neck ring (20) sleeved on the trachea (8), and the sleeve (9) is provided with a sealing ring (21) coaxially sleeved outside the neck ring (20). The inner wall of the sealing ring (21) is connected to the neck ring (20) through a coil spring (22).

5. The biomass boiler bag filter dust collector according to claim 4, characterized in that, A sealing assembly is provided between the neck ring (20) and the sealing ring (21). The sealing assembly is triggered by the relative rotation of the neck ring (20) and the sealing ring (21) to enhance the sealing between the swing member (5) and the trachea (8).

6. The biomass boiler bag filter dust collector according to claim 5, characterized in that, The sealing assembly includes a convex ring (23) provided at the end of the air tube (8) and a transition ring (24) rotatably connected to the inner side of the sealing ring (21). A coil spring (22) is connected between the sealing ring (21) and the transition ring (24). The transition ring (24) is spirally sleeved on the neck ring (20).

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