Dust filter for coal-fired thermal power plant

Abstract

The invention relates to the technical field of dust treatment of coal-fired thermal power plants, in particular to a dust filter of a coal-fired thermal power plant. The device comprises a purification box, an air inlet is formed in the left end in the purification box, an air outlet is formed in the right end in the purification box, a plurality of anode plates are slidably connected to the left end in the purification box, a plurality of connecting plates are fixed to the top ends of the anode plates, and the top ends of the connecting plates are slidably connected with the purification box; a plurality of cathode tubes are assembled at the bottom end of the connecting plate and located between the two anode plates, and a flow guide hopper and a flow dividing tube are fixed to the middle of the interior of the purification box. According to the dust filter for the coal-fired thermal power plant provided by the invention, the anode plates and the cathode tubes are electrified, and then discharged gas and dust pass through the space between the two anode plates, so that the gas drives the dust to be combined with negative ions to be charged with negative electricity; electrons encounter dust and are negatively charged to be adsorbed to the surface of the anode plate to be collected in the process of running to the anode.

Description

Technical Field

[0001] The invention relates to the technical field of dust control in coal-fired thermal power plants, in particular to a dust filter for coal-fired thermal power plants. Background Art

[0002] Power generation from thermal power plants is one of the important sources of electricity in my country. Thermal power plants generally use coal as raw material. During the production process, a large amount of coal dust will be generated after the coal is burned. If it is not thoroughly filtered and discharged into the air, it will cause great harm to the environment.

[0003] When using the above technology, it was found that the existing technology has the following technical problems: the existing technology usually adopts traditional bag filters, and the filter material efficiency of this filter is poor. Due to the accumulation of dust on its surface, its filtration resistance increases and the filtration efficiency is significantly reduced, and it needs to be removed and cleaned regularly. Secondly, the existing filters generally adopt single filtration without multiple filtration, which is not convenient for deep filtration of dust. For this reason, we designed a dust filter for coal-fired power plants to provide another technical solution to the above technical problems. Summary of the Invention

[0004] Based on this, it is necessary to provide a dust filter for a coal-fired power plant to address the above technical problems. A large amount of coal dust will be generated after coal combustion. At this time, in order to prevent the coal dust from directly polluting the air, it is connected to the air inlet through a conduit, and then the anode plate and the cathode tube are energized. The discharged gas and dust pass through the two anode plates, so that the gas drives the dust to combine with negative ions and carry negative charge. When the electrons rush to the positive electrode, they encounter the negatively charged dust and are adsorbed on the surface of the anode plate for collection, and then the dust is deposited on the surface of the anode plate. Therefore, the dust is filtered and collected by electrostatic means, and the gas after electrostatic filtration is guided to the inner side of the filter cartridge along the guide bucket and the diversion pipe, and the gas is further filtered through the filter cartridge to improve the gas to meet environmental emission standards.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A dust filter for a coal-fired power plant includes a purification box, an air inlet is provided at the left end of the interior of the purification box, an air outlet is provided at the right end of the interior of the purification box, a plurality of anode plates are slidably connected to the left end of the interior of the purification box, a plurality of connecting plates are fixed to the top end of the anode plates, the top end of the connecting plates is slidably connected to the purification box, a plurality of cathode tubes are assembled at the bottom end of the connecting plates and located between the two anode plates, a guide hopper and a diverter pipe are fixed in the middle of the interior of the purification box, a plurality of filter cartridges are fixed to the bottom end of the diverter pipe, and a support frame is fixed to the bottom end of the filter cartridge.

[0006] As a preferred embodiment of the dust filter of a coal-fired power plant provided by the present invention, a dust exhaust port 1 is provided at the left end of the bottom end of the purification box, a dust exhaust port 2 is provided at the right end of the bottom end of the purification box, a material receiving box 1 is slidably connected to the bottom end of the purification box and located below the dust exhaust port 1, and a material receiving box 2 is slidably connected to the bottom end of the purification box and located below the dust exhaust port 2, and the material receiving box 1 and the material receiving box 2 are respectively slidably connected to the purification box.

[0007] As a preferred embodiment of the dust filter of a coal-fired power plant provided by the present invention, an electrostatic knocking mechanism for screening dust is provided at the left end inside the purification box, and the electrostatic knocking machine includes a buffer component, a striking vibration component and a drive component. The right end of the anode plate is provided with a buffer component, and the inside of the purification box and at the left end of the anode plate are provided with a striking vibration component, and one side of the purification box is provided with a drive component for driving the striking vibration component.

[0008] As a preferred embodiment of the dust filter of a coal-fired power plant provided by the present invention, the buffer assembly includes a U-shaped frame and a spring, the right end of the anode plate is slidably connected to the U-shaped frame, the top and bottom ends of the U-shaped frame are fixed to the purification box, and several springs are arranged on the inner side of the U-shaped frame, one end of the spring is fixed to the anode plate, and the other end of the spring is fixed to the U-shaped frame.

[0009] As a preferred embodiment of the dust filter of a coal-fired power plant provided by the present invention, the impact vibration assembly includes a transmission rod 1, a transmission block, a hinge and a collision cylinder. The left end inside the purification box is rotatably connected to the transmission rod 1, and a transmission block is fixed to the outside of the transmission rod 1 and at the left end of the anode plate. The end of the transmission block away from the transmission rod 1 is rotatably connected to the transmission block, and the end of the transmission block inside the transmission block away from the transmission rod 1 is rotatably connected to the collision cylinder.

[0010] As a preferred embodiment of the dust filter for a coal-fired power plant provided by the present invention, a protective sleeve is sleeved on the outer side of the collision cylinder.

[0011] As a preferred embodiment of the dust filter of a coal-fired power plant provided by the present invention, the drive assembly includes a servo motor, a worm and a worm wheel. A servo motor is fixed to one side of the purification box, a worm is fixed to the output end of the servo motor, one end of the transmission rod passes through the purification box and is fixed to the worm wheel, and the top end of the worm wheel is meshed with the worm.

[0012] As a preferred embodiment of the dust filter of a coal-fired power plant provided by the present invention, a cleaning mechanism is arranged on the inner side of the filter cartridge, and the cleaning mechanism includes an annular frame, a guide rod, a screw rod and a transmission assembly. Both sides of the inner side of the filter cartridge are rotatably connected to the screw rod and the guide rod, and the inner side of the filter cartridge is slidably connected to the annular frame, one side of the inner side of the annular frame is threadedly connected to the screw rod, and the other side of the inner side of the annular frame is slidably connected to the guide rod, and the bottom end of the screw rod is fixed with a bevel gear.

[0013] As a preferred embodiment of the dust filter for a coal-fired power plant provided by the present invention, a brush ring is fixed to the contact surface between the outer side of the annular frame and the filter cartridge by bolts.

[0014] As a preferred embodiment of the dust filter of a coal-fired power plant provided by the present invention, the transmission assembly includes a servo motor 2, a transmission rod 2 and a main bevel gear. The transmission rod 2 is rotatably connected inside the support frame. A servo motor 2 is fixed to one end of the support frame. The output end of the servo motor 2 is fixed to the transmission rod 2. Several main bevel gears are fixed to the outside of the transmission rod 2. The top of the main bevel gear is meshed with the slave bevel gear.

[0015] It can be seen without a doubt that the above-mentioned technical solution of this application can definitely solve the technical problem to be solved by this application.

[0016] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects: The present invention provides a dust filter for a coal-fired power plant: 1. The discharged gas and dust are connected to the air inlet through a conduit, and then the anode plate and cathode tube are energized. Then, the discharged gas and dust pass through the space between the two anode plates, so that the gas drives the dust to combine with negative ions and carry negative electricity. When the electrons rush to the positive electrode, they encounter the negatively charged dust and are adsorbed on the surface of the anode plate for collection. Therefore, the dust is filtered and collected by electrostatic means, so as to filter and screen part of the dust in the discharged gas. 2. Start the servo motor to drive the worm, worm wheel and transmission rod to rotate, so that the transmission rod drives the transmission block to rotate, and the transmission block drives the hinge and the collision cylinder to knock the anode plate, and the dust on the surface of the anode plate falls into the inside of the receiving box, so that the dust dropped from the anode plate can be centrally processed; 3. The filtered gas is guided to the inside of the filter cartridge through the electrostatic field of the anode plate and cathode tube through the diversion hopper and the diversion pipe respectively. The dust contained in the gas is deeply filtered through the filter cartridge to meet environmental protection standards. 4. By starting the servo motor 2, the transmission rod 2 and the main bevel gear are driven to rotate, so that the main bevel gear drives the slave bevel gear and the screw to rotate, and the screw drives the annular frame and the brush ring to move up and down along the annular frame, so that the brush ring can clean the dust accumulated on the inner wall of the filter cartridge. The clean inner wall of the filter cartridge falls into the interior of the receiving box 2 for centralized collection and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic side structural diagram of the present invention as a whole; Figure 3 Schematic diagram of the internal structure of the purification box of the present invention; Figure 4 This is a schematic structural diagram of the electrostatic knocking mechanism of the present invention; Figure 5 This is a schematic diagram of the connection structure between the anode plate and the U-shaped frame of the present invention; Figure 6 This is a schematic diagram of the structure of the striking vibration component of the present invention; Figure 7 This is a schematic structural diagram of the cleaning mechanism of the present invention; Figure 8 It is a schematic diagram of the transmission assembly structure of the present invention.

[0019] In the figure: 1. Purification box; 2. Material collecting box 1; 3. Air inlet; 4. Air outlet; 5. Material collecting box 2; 6. Servo motor 1; 7. Worm; 8. Worm gear; 9. Anode plate; 10. Connecting plate; 11. U-shaped frame; 12. Guide bucket; 13. Diverter pipe; 14. Filter cartridge; 15. Support frame; 16. Cathode tube; 17. Transmission rod 1; 18. Transmission block; 19. Hinge; 20. Collision cylinder; 21. Spring; 22. Ring frame; 23. Guide rod; 24. Screw; 25. Servo motor 2; 26. Transmission rod 2; 27. Slave bevel gear; 28. Main bevel gear. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein may be combined with each other.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] Example 1 Please refer to Figures 1-6 A dust filter for a coal-fired power plant includes a purification box 1, an air inlet 3 is provided at the left end of the interior of the purification box 1, an air outlet 4 is provided at the right end of the interior of the purification box 1, a plurality of anode plates 9 are slidably connected to the left end of the interior of the purification box 1, a plurality of connecting plates 10 are fixed to the top of the anode plates 9, the top of the connecting plate 10 is slidably connected to the purification box 1, a plurality of cathode tubes 16 are assembled at the bottom end of the connecting plate 10 and located between the two anode plates 9, a guide hopper 12 and a diverter pipe 13 are fixed in the middle of the interior of the purification box 1, a plurality of filter cartridges 14 are fixed to the bottom end of the diverter pipe 13, and a support frame 15 is fixed to the bottom end of the filter cartridge 14; Specifically, a large amount of coal dust is generated after the coal is burned. At this time, in order to prevent the coal dust from directly polluting the air, a conduit is connected to the air inlet 3, and then the anode plate 9 and the cathode tube 16 are energized. Then, the discharged gas and dust pass through the two anode plates 9, so that the gas drives the dust to combine with negative ions and carry negative electricity. When the electrons rush to the positive electrode, they encounter the negatively charged dust and are adsorbed on the surface of the anode plate 9 for collection. Then, the dust is deposited on the surface of the anode plate 9. Therefore, the dust is filtered and collected by electrostatic means, and the gas after electrostatic filtration is guided along the guide bucket 12 and the diverter pipe 13 to the inner side of the filter cartridge 14, and the gas is further filtered by the filter cartridge 14 to improve the gas to meet the environmental emission standards. A dust outlet 1 is provided at the left end of the bottom of the purification box 1, a dust outlet 2 is provided at the right end of the bottom of the purification box 1, a material receiving box 1 2 is slidably connected to the bottom end of the purification box 1 and below the dust outlet 1, and a material receiving box 2 5 is slidably connected to the bottom end of the purification box 1 and below the dust outlet 2, and the material receiving box 1 2 and the material receiving box 2 5 are respectively slidably connected to the purification box 1; An electrostatic beating mechanism for screening dust is provided at the left end of the interior of the purification box 1. The electrostatic beating machine includes a buffer assembly, a beating vibration assembly and a drive assembly. The right end of the anode plate 9 is provided with a buffer assembly. The interior of the purification box 1 and the left end of the anode plate 9 are provided with a beating vibration assembly. A drive assembly for driving the beating vibration assembly is provided on one side of the purification box 1. Furthermore, when it is necessary to filter the dust in the gas, the negative ions generated by the cathode tube 16 and the anode plate 9 cause the dust to be adsorbed on the surface of the anode plate 9. At this time, the driving component drives the striking vibration component to apply pressure to the anode plate 9, so that the anode plate 9 moves along the length of the purification box 1 toward the buffer component, thereby generating a vibration sensation on the anode plate 9, so that the dust adsorbed on the surface of the anode plate 9 falls into the interior of the receiving box 2 for collection; The buffer assembly includes a U-shaped frame 11 and a spring 21. The right end of the anode plate 9 is slidably connected to the U-shaped frame 11. The top and bottom ends of the U-shaped frame 11 are fixed to the purification box 1. A plurality of springs 21 are provided on the inside of the U-shaped frame 11. One end of the spring 21 is fixed to the anode plate 9, and the other end of the spring 21 is fixed to the U-shaped frame 11. The striking vibration assembly includes a transmission rod 17, a transmission block 18, a hinge 19 and a collision cylinder 20. The left end inside the purification box 1 is rotatably connected to the transmission rod 17. The transmission block 18 is fixed to the outside of the transmission rod 17 and located at the left end of the anode plate 9. The end of the transmission block 18 away from the transmission rod 17 is rotatably connected to the transmission block 18. The end inside the transmission block 18 away from the transmission rod 17 is rotatably connected to the collision cylinder 20. The outer side of the collision cylinder 20 is sleeved with a protective sleeve. The drive assembly includes a servo motor 6, a worm 7 and a worm wheel 8. A servo motor 6 is fixed to one side of the purification box 1. The output end of the servo motor 6 is fixed to the worm 7. One end of the transmission rod 17 passes through the purification box 1 and is fixed to the worm wheel 8. The top end of the worm wheel 8 is meshed with the worm 7. Furthermore, by supplying power to the anode plate 9 and the cathode tube 16, the dust in the electrostatic field gas generated by the anode plate 9 and the cathode tube 16 is screened, and the dust is adsorbed onto the surface of the anode plate 9, thereby starting the servo motor 6 to drive the worm 7, the worm wheel 8 and the transmission rod 17 to rotate, so that the transmission rod 17 drives the transmission block 18 to rotate, and the transmission block 18 drives the hinge 19 and the collision cylinder 20 to knock the anode plate 9, and the dust on the surface of the anode plate 9 falls into the inside of the receiving box 2, which is convenient for centralized collection and processing.

[0025] Example 2 Please refer to Figure 7 and Figure 8, a dust filter for a coal-fired thermal power plant, a cleaning mechanism is arranged on the inner side of the filter cartridge 14, the cleaning mechanism comprising an annular frame 22, a guide rod 23, a screw rod 24 and a transmission assembly, both sides of the inner side of the filter cartridge 14 are rotatably connected with the screw rod 24 and the guide rod 23, the inner side of the filter cartridge 14 is slidably connected with the annular frame 22, one side of the inner side of the annular frame 22 is threadedly connected to the screw rod 24, the other side of the inner side of the annular frame 22 is slidably connected to the guide rod 23, the bottom end of the screw rod 24 is fixed with a slave bevel gear 27, the outer side of the annular frame 22 and the contact surface with the filter cartridge 14 are fixed with a brush ring by bolts; The transmission assembly includes a servo motor 25, a transmission rod 26 and a main bevel gear 28. The transmission rod 26 is rotatably connected to the interior of the support frame 15. The servo motor 25 is fixed to one end of the support frame 15. The output end of the servo motor 25 is fixed to the transmission rod 26. Several main bevel gears 28 are fixed to the outside of the transmission rod 26. The top of the main bevel gear 28 is meshed with the slave bevel gear 27. Furthermore, the electrostatic field of the anode plate 9 and the cathode tube 16 guides the filtered gas through the guide hopper 12 and the diverter pipe 13 to the inside of the filter cartridge 14, and the dust contained in the gas is deeply filtered by the filter cartridge 14 to meet environmental protection standards. When the filter cartridge 14 filters the dust in the screened gas for a long time, a large amount of dust will accumulate on the inner wall of the filter cartridge 14, which will cause the inner wall of the filter cartridge 14 to be blocked, affecting the gas discharge and filtering effect. Therefore, it is necessary to clean the inner wall of the filter cartridge 14 regularly. By starting the servo motor 25 to drive the transmission rod 26 and the main bevel gear 28 to rotate, the main bevel gear 28 drives the slave bevel gear 27 and the screw rod 24 to rotate, and the screw rod 24 drives the annular frame 22 and the brush ring to move up and down along the annular frame 22, so that the brush ring can clean the dust accumulated on the inner wall of the filter cartridge 14. Therefore, the clean inner wall of the filter cartridge 14 falls into the interior of the material receiving box 2 5 for centralized collection and processing, thereby effectively ensuring the filtering effect of the filter cartridge 14.

[0026] The use process of the dust filter of a coal-fired power plant provided by the present invention is as follows: Working principle: When in use, a large amount of coal dust will be generated after the coal is burned. The discharged gas and dust are connected to the air inlet 3 through a conduit, and then the anode plate 9 and the cathode tube 16 are energized, and then the discharged gas and dust pass through the two anode plates 9, so that the gas drives the dust to combine with negative ions and carry negative electricity. When the electrons rush to the positive electrode, they encounter the negatively charged dust and adsorb it on the surface of the anode plate 9 for collection, and then the dust is deposited on the surface of the anode plate 9. At this time, the servo motor 6 is started to drive the worm 7, the worm wheel 8 and the transmission rod 17 to rotate, so that the transmission rod 17 drives the transmission block 18 to rotate, so that the transmission block 18 drives the hinge 19 and the collision cylinder 20 to knock the anode plate 9, and the dust on the surface of the anode plate 9 falls into the inside of the receiving box 2, which is convenient for centralized collection and treatment; The electrostatic field of the anode plate 9 and the cathode tube 16 guides the filtered gas through the guide bucket 12 and the diversion pipe 13 to the inside of the filter cartridge 14 respectively, and the dust contained in the gas is deeply filtered through the filter cartridge 14. When the filter cartridge 14 filters the dust in the filtered gas for a long time, a large amount of dust will accumulate on the inner wall of the filter cartridge 14, thereby causing the inner wall of the filter cartridge 14 to be blocked, affecting the gas discharge and filtering effect. Therefore, it is necessary to clean the inner wall of the filter cartridge 14 regularly, and by starting the servo motor 25 to drive the transmission rod 26 and the main bevel gear 28 to rotate, so that the main bevel gear 28 drives the slave bevel gear 27 and the screw rod 24 to rotate, and the screw rod 24 drives the annular frame 22 and the brush ring to move up and down along the annular frame 22, so that the brush ring cleans the dust accumulated on the inner wall of the filter cartridge 14. Therefore, the clean inner wall of the filter cartridge 14 falls into the interior of the collecting box 2 5 for centralized collection and processing, thereby effectively ensuring the filtering effect of the filter cartridge 14.

[0027] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dust filter for a coal-fired power plant, characterized in that: The invention comprises a purification box (1), wherein an air inlet (3) is provided at the left end of the interior of the purification box (1), an air outlet (4) is provided at the right end of the interior of the purification box (1), a plurality of anode plates (9) are slidably connected to the left end of the interior of the purification box (1), a plurality of connecting plates (10) are fixed to the top end of the anode plates (9), the top end of the connecting plates (10) is slidably connected to the purification box (1), a plurality of cathode tubes (16) are mounted at the bottom end of the connecting plates (10) and located between the two anode plates (9), a guide hopper (12) and a diverter pipe (13) are fixed in the middle of the interior of the purification box (1), a plurality of filter cartridges (14) are fixed to the bottom end of the diverter pipe (13), and a support frame (15) is fixed to the bottom end of the filter cartridge (14).

2. A dust filter for a coal-fired power plant according to claim 1, characterized in that: A dust outlet 1 is provided at the left end of the bottom of the purification box (1), a dust outlet 2 is provided at the right end of the bottom of the purification box (1), a material receiving box 1 (2) is slidably connected to the bottom of the purification box (1) and below the dust outlet 1, and a material receiving box 2 (5) is slidably connected to the bottom of the purification box (1) and below the dust outlet 2, and the material receiving box 1 (2) and the material receiving box 2 (5) are respectively slidably connected to the purification box (1).

3. A dust filter for a coal-fired power plant according to claim 2, characterized in that: An electrostatic beating mechanism for screening dust is provided at the left end of the interior of the purification box (1), and the electrostatic beating machine includes a buffer component, a striking vibration component and a driving component. The right end of the anode plate (9) is provided with a buffer component, and the interior of the purification box (1) and at the left end of the anode plate (9) is provided with a striking vibration component. A driving component for driving the striking vibration component is provided on one side of the purification box (1).

4. A dust filter for a coal-fired power plant according to claim 3, characterized in that: The buffer assembly includes a U-shaped frame (11) and a spring (21), the right end of the anode plate (9) is slidably connected to the U-shaped frame (11), the top and bottom ends of the U-shaped frame (11) are fixed to the purification box (1), and a plurality of springs (21) are provided on the inner side of the U-shaped frame (11), one end of the spring (21) is fixed to the anode plate (9), and the other end of the spring (21) is fixed to the U-shaped frame (11).

5. The dust filter for a coal-fired power plant according to claim 3, characterized in that: The striking vibration assembly includes a transmission rod (17), a transmission block (18), a hinge (19) and a collision cylinder (20), wherein the left end inside the purification box (1) is rotatably connected to the transmission rod (17), the transmission block (18) is fixed on the outside of the transmission rod (17) and located at the left end of the anode plate (9), the end of the transmission block (18) away from the transmission rod (17) is rotatably connected to the transmission block (18), and the end of the transmission block (18) away from the transmission rod (17) is rotatably connected to the collision cylinder (20).

6. A dust filter for a coal-fired power plant according to claim 5, characterized in that: The outer side of the collision cylinder (20) is sleeved with a protective sleeve.

7. The dust filter for a coal-fired power plant according to claim 5, characterized in that: The driving assembly comprises a servo motor (6), a worm (7) and a worm wheel (8); a servo motor (6) is fixed to one side of the purification box (1); a worm (7) is fixed to the output end of the servo motor (6); one end of the transmission rod (17) passes through the purification box (1) and is fixed to the worm wheel (8); the top end of the worm wheel (8) is meshed with the worm (7).

8. The dust filter for a coal-fired power plant according to claim 7, characterized in that: A cleaning mechanism is provided on the inner side of the filter cartridge (14), the cleaning mechanism comprising an annular frame (22), a guide rod (23), a screw rod (24) and a transmission assembly. Both sides of the inner side of the filter cartridge (14) are rotatably connected to the screw rod (24) and the guide rod (23). The inner side of the filter cartridge (14) is slidably connected to the annular frame (22). One side of the inner side of the annular frame (22) is threadedly connected to the screw rod (24), and the other side of the inner side of the annular frame (22) is slidably connected to the guide rod (23). A bevel gear (27) is fixed to the bottom end of the screw rod (24).

9. The dust filter for a coal-fired power plant according to claim 8, characterized in that: A brush ring is fixed to the contact surface between the outer side of the annular frame (22) and the filter cartridge (14) via bolts.

10. The dust filter for a coal-fired power plant according to claim 8, characterized in that: The transmission assembly includes a servo motor 2 (25), a transmission rod 2 (26) and a main bevel gear (28). The support frame (15) is internally rotatably connected to the transmission rod 2 (26). One end of the support frame (15) is fixed with a servo motor 2 (25). The output end of the servo motor 2 (25) is fixed to the transmission rod 2 (26). A plurality of main bevel gears (28) are fixed to the outside of the transmission rod 2 (26). The top end of the main bevel gear (28) is meshed and connected with the slave bevel gear (27).

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