Fly ash transfer dedusting device

Abstract

This application relates to a fly ash transfer and dust removal device, belonging to the technical field of dust removal equipment. The application includes a fly ash storage tank for collecting fly ash, a screw feeder disposed at the bottom of the fly ash storage tank, a crusher disposed at the discharge port of the screw feeder, a screw conveyor disposed at the discharge port of the crusher, and a ash storage tank car disposed at the discharge pipe of the screw conveyor. It also includes a sealing assembly and a negative pressure balancing mechanism. The sealing assembly is disposed at the inlet and outlet pipes of the screw conveyor, for sealing connection with the discharge port of the crusher and the inlet of the ash storage tank car. The negative pressure balancing mechanism includes a negative pressure pipe disposed on the side wall of the discharge pipe of the screw conveyor, a bag filter disposed at the end of the negative pressure pipe away from the screw conveyor, and a negative pressure fan disposed at the exhaust port of the bag filter. This application can improve the sealing performance and dust removal efficiency throughout the fly ash transfer process.

Description

Technical Field

[0001] This application relates to the field of dust removal equipment technology, and in particular to a fly ash transfer and dust removal device. Background Technology

[0002] Boiler systems generate a large amount of fly ash during operation, which, if directly released into the air, will severely pollute the atmospheric environment. Furthermore, the large volume of fly ash necessitates its transfer and centralized collection before further treatment. Therefore, dust control and protection during fly ash transfer are crucial.

[0003] The existing fly ash transfer system includes a fly ash storage tank for collecting fly ash generated by the boiler system, a screw feeder located at the bottom of the fly ash storage tank, a crusher located at the discharge port of the screw feeder, a screw conveyor located at the discharge port of the crusher, and an ash storage tank truck located at the discharge pipe of the screw conveyor. The screw feeder continuously conveys the fly ash from the fly ash storage tank to the crusher, which crushes agglomerated and large-particle fly ash. The crushed fly ash falls into the screw conveyor, which then directionally conveys it to the ash storage tank truck for loading. Once full, the ash storage tank truck is transferred to the treatment workshop for centralized disposal.

[0004] Regarding the aforementioned technologies, during the process of transporting fly ash from the screw conveyor to the ash storage tank truck, dust is easily generated at the connection between the discharge port of the screw conveyor and the inlet of the ash storage tank truck. Summary of the Invention

[0005] In order to improve the sealing performance and dust removal efficiency of the entire fly ash transfer process, this application provides a fly ash transfer dust removal device.

[0006] The fly ash transfer and dust removal device provided in this application adopts the following technical solution: A fly ash transfer and dust removal device includes a fly ash storage tank for collecting fly ash, a screw feeder disposed at the bottom of the fly ash storage tank, a crusher disposed at the discharge port of the screw feeder, a screw conveyor disposed at the discharge port of the crusher, and a fly ash storage tank car disposed at the discharge pipe of the screw conveyor. It also includes a sealing assembly and a negative pressure balancing mechanism. The sealing assembly is disposed at the inlet and outlet pipes of the screw conveyor and is used for sealing connection with the discharge port of the crusher and the inlet of the fly ash storage tank car. The negative pressure balancing mechanism includes a negative pressure pipe disposed on the side wall of the discharge pipe of the screw conveyor, a bag filter disposed at the end of the negative pressure pipe away from the screw conveyor, and a negative pressure fan disposed at the exhaust port of the bag filter.

[0007] By adopting the above technical solution, the sealing component achieves a sealed connection at the connection point between the discharge pipe and the feed pipe of the screw conveyor. In conjunction with the negative pressure balancing mechanism, a stable negative pressure environment is formed at the discharge pipe of the screw conveyor, which promptly draws the dust generated during the transfer process into the bag filter for filtration and purification, effectively solving the dust leakage problem at the connection between the discharge port and the ash storage tank truck, and ensuring a clean working environment.

[0008] Optionally, the air pressure range of the suction port of the negative pressure pipe near the screw conveyor is 18 to 20 Pa.

[0009] By adopting the above technical solution, the air pressure at the air intake is controlled within a reasonable range, ensuring sufficient negative pressure suction, achieving efficient dust extraction, and reducing the risk of pipeline blockage caused by excessive air pressure directly sucking a large amount of fly ash into the negative pressure pipe, thus balancing dust removal efficiency and equipment operation stability.

[0010] Optionally, the outer diameter of the negative pressure tube is in the range of 105 to 110 mm, and the inner diameter of the negative pressure tube is in the range of 95 to 100 mm.

[0011] By adopting the above technical solution, the inner and outer diameters of the negative pressure pipe are reasonably set to ensure that the negative pressure pipe has sufficient structural strength, can withstand the impact of negative pressure and fly ash without deformation, and can adapt to the negative pressure suction flow requirements, ensuring smooth airflow and meeting the working conditions of the entire transfer device.

[0012] Optionally, the negative pressure pipe is inclinedly disposed on the screw conveyor, and an oscillating diaphragm is disposed on the side wall of the negative pressure pipe. A striking block is disposed on the side of the oscillating diaphragm away from the negative pressure pipe, and the oscillating diaphragm performs reciprocating oscillating motion under the air pressure difference inside and outside the negative pressure pipe.

[0013] By adopting the above technical solution, the inclined negative pressure pipe can reduce the accumulation of fly ash inside the pipe. The oscillating diaphragm uses the pressure difference between the inside and outside of the negative pressure pipe to automatically oscillate back and forth, driving the striking block to move synchronously and continuously strike the side wall of the negative pressure pipe, shaking off the fly ash attached to the pipe wall, effectively preventing fly ash from sticking and clogging the negative pressure pipe, and ensuring the long-term smooth flow of the negative pressure suction channel.

[0014] Optionally, the negative pressure tube has an oscillation hole for the oscillating diaphragm to oscillate back and forth. The oscillating diaphragm includes an elastic part for reciprocating oscillation and a mounting part for fixed connection with the negative pressure tube. The striking block is fixed to the elastic part, and the inner wall of the oscillation hole has a mounting groove for the mounting part to be arranged.

[0015] By adopting the above technical solution, the oscillation hole provides sufficient space for the oscillation diaphragm to swing, the mounting part realizes a stable connection between the oscillation diaphragm and the negative pressure tube, and the elastic part has good deformation and reset capabilities, ensuring the continuous and stable reciprocating oscillation action and driving the striking block to accurately complete the striking and dust removal action.

[0016] Optionally, the mounting part is provided with sealing rings on opposite sides along the axis of the oscillation hole, the mounting part is provided with fixing bolts for fixed connection with the negative pressure pipe, the mounting part is provided with through holes for the fixing bolts to pass through, the outer wall of the negative pressure pipe is provided with threaded through holes corresponding to the through holes, and the inner wall of the mounting groove is provided with threaded holes that are threadedly engaged with the fixing bolts.

[0017] By adopting the above technical solution, the sealing ring is locked with the fixing bolts to achieve a sealed connection between the installation part and the oscillation hole, avoiding air leakage in the negative pressure pipe and ensuring the stability of the negative pressure inside the pipe. At the same time, the sealing structure is simple, easy to disassemble and assemble, and convenient for subsequent maintenance and replacement.

[0018] Optionally, the side wall of the negative pressure pipe is provided with a guide frame for guiding the striking block, and guide rails are provided on opposite sides of the striking block. A guide groove is provided on the side of the guide frame near the striking block to slide and cooperate with the guide rails.

[0019] By adopting the above technical solution, the guide frame and the guide rail slide together to guide the reciprocating motion of the striking block, limit the swing deviation of the striking block, ensure the axial movement of the striking block, improve the dust removal effect, and reduce the risk of the striking block misalignment affecting the dust removal efficiency or damaging the pipeline.

[0020] Optionally, the sealing assembly includes a bellows for relieving stress, connecting portions disposed at opposite ends of the bellows, a sealing strip disposed at the connecting portion, and a fixing assembly for pressing the connecting portion. The discharge port of the crusher, the inlet of the ash storage tank truck, and the openings of the feed pipe and discharge pipe of the screw conveyor are all provided with mounting rings corresponding to the connecting portions. The fixing assembly clamps the connecting portion and the mounting ring.

[0021] By adopting the above technical solutions, the corrugated pipe has flexible expansion and contraction characteristics, which can alleviate the mechanical stress generated by pipeline connection and equipment operation, adapt to pipeline installation deviation and operational deformation, and the sealing strip, together with the fixing components, can achieve a tight seal between the connection and the mounting ring, reduce dust leakage from pipeline connection gaps, and improve the overall sealing effect.

[0022] Optionally, the fixing component includes a fixing base, a fixing plate disposed at one end of the fixing base, a movable plate rotatably disposed at the other end of the fixing base, and a drive handle rotatably disposed on the side wall of the fixing base for driving the movable plate to press against the fixing plate.

[0023] By adopting the above technical solution, rotating the drive handle can drive the movable plate to press against the fixed plate, thereby clamping and fixing the connecting part and the mounting ring. At the same time, it facilitates quick disassembly of the sealing component for inspection and maintenance, improving the ease of disassembly and assembly of the device.

[0024] Optionally, a drive block is provided at one end of the drive handle near the movable plate, a transmission tooth is provided at one end of the movable plate near the fixed seat to mesh with the drive block, and a limiting seat is provided at the fixed seat to limit the shaking of the drive handle.

[0025] By adopting the above technical solution, the drive block and the transmission gear mesh with each other, which can ensure the clamping force of the movable plate, the seal is firm, and prevent loosening that could lead to dust leakage; the limit seat can limit the shaking of the drive handle and ensure the locking stability of the fixed components.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The sealing component achieves a sealed connection between the discharge pipe and the feed pipe of the screw conveyor. In conjunction with the negative pressure suction system, it can promptly suck up residual dust in the pipeline, effectively alleviate the dust leakage problem at the connection between the screw conveyor and the ash storage tank truck, and effectively protect the surrounding working environment. 2. The inclined negative pressure pipe, combined with the air pressure driven automatic knocking and dust removal structure, continuously shakes off the fly ash deposited on the pipe wall, preventing fly ash from sticking and clogging the pipe, ensuring the long-term unobstructed negative pressure suction channel, and reducing the workload of equipment operation and maintenance. 3. The sealing assembly adopts a flexible corrugated pipe and an eccentric compression fixing structure, which can adapt to pipeline installation deviations and equipment operation deformation. It is reliable in sealing and efficient in disassembly and assembly. The whole set of equipment has a compact structure, is suitable for various boiler fly ash transfer scenarios, and takes into account both dust removal efficiency and ease of use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the negative pressure balancing mechanism in the embodiments of this application.

[0029] Figure 3 This is a cross-sectional view of the oscillating diaphragm in an embodiment of this application.

[0030] Figure 4 This is an embodiment of the present application. Figure 3 Enlarged view of point A in the middle.

[0031] Figure 5 This is a cross-sectional view of the guide frame in an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the sealing assembly in an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the structure of the fixed component in the embodiments of this application.

[0034] Figure 8 This is a cross-sectional view of the driving block in an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Fly ash storage tank; 2. Screw feeder; 3. Crusher; 4. Screw conveyor; 41. Mounting ring; 5. Ash storage tank car; 6. Sealing assembly; 61. Bellows; 62. Connecting part; 63. Fixing assembly; 631. Fixing seat; 6311. Limiting seat; 632. Fixing plate; 633. Movable plate; 6331. Rotating block; 6332. Transmission gear; 634. Drive handle; 6341. Drive block; 64. Sealing strip; 7. Negative pressure. Balancing mechanism; 71. Negative pressure pipe; 711. Vibrating diaphragm; 7111. Elastic part; 7112. Mounting part; 71121. Sealing ring; 71122. Fixing bolt; 71123. Through hole; 712. Striking block; 7121. Guide rail; 713. Vibration hole; 7131. Mounting groove; 71311. Threaded hole; 714. Threaded through hole; 715. Guide frame; 7151. Guide groove; 72. Bag dust collector; 73. Negative pressure fan. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0037] This application discloses a fly ash transfer and dust removal device.

[0038] Reference Figure 1 This application includes a fly ash storage tank 1, a screw feeder 2, a crusher 3, a screw conveyor 4, an ash storage tank truck 5, a sealing assembly 6, and a negative pressure balancing mechanism 7. The fly ash storage tank 1 is used for centralized storage of fly ash generated during boiler system operation. The screw feeder 2 transports the fly ash from the storage tank 1 to the crusher 3. The crusher 3 crushes and refines agglomerated and large-particle fly ash. The crushed fly ash falls into the screw conveyor 4, which then directionally transports it to the ash storage tank truck 5 for sealed loading. The ash storage tank truck 5 then transports the ash to a designated location for centralized disposal. Two sets of screw conveyors 4 are provided, and the sealing assembly 6 is arranged on the inlet and outlet pipes of the screw conveyors 4.

[0039] Reference Figure 2The negative pressure balancing mechanism 7 includes a negative pressure pipe 71 installed on the side wall of the discharge pipe of the screw conveyor 4, a bag filter 72 installed at the end of the negative pressure pipe 71 away from the screw conveyor 4, and a negative pressure fan 73 installed at the exhaust port of the bag filter 72. When the negative pressure fan 73 is running, it can create a stable negative pressure environment inside the negative pressure pipe 71 and the screw conveyor 4, promptly drawing dust generated during the transfer process into the bag filter 72 for filtration and discharging clean air, effectively alleviating dust leakage problems at the connection between the discharge port of the screw conveyor 4 and the ash storage tank 5. Furthermore, during the process of fly ash entering the ash storage tank, because the entire pipeline is sealed, the original air inside the ash storage tank cannot be naturally discharged. The negative pressure fan 73, through the continuous suction generated by the negative pressure pipe 71, can simultaneously draw away excess air from the ash storage tank, maintaining the internal pressure balance of the system and preventing the increase in air pressure inside the tank from affecting the smoothness of ash feeding or damaging the sealing structure. This balancing effect works in conjunction with the dust extraction function to ensure both dust removal efficiency and pressure stability during the closed transfer process.

[0040] The air pressure at the suction port of the negative pressure pipe 71 near the screw conveyor 4 is 18 to 20 Pa. After repeated experiments, the optimal air pressure at the suction port of the negative pressure pipe 71 is 20 Pa. This air pressure can ensure a stable negative pressure suction force, achieving efficient dust extraction, while effectively reducing the risk of excessive air pressure causing a large amount of fly ash to be directly sucked into the negative pressure pipe 71, resulting in pipe blockage. This maintains a slight negative pressure state in each pipe, balancing dust removal efficiency and long-term operational stability of the equipment.

[0041] The outer diameter of the negative pressure pipe 71 ranges from 105 to 110 mm, and the inner diameter ranges from 95 to 100 mm. After repeated experiments, the outer diameter of the negative pressure pipe 71 is preferably 108 mm, and the inner diameter is preferably 100 mm. The reasonable pipe diameter design gives the negative pressure pipe 71 sufficient structural strength to withstand the continuous impact of negative pressure and fly ash inside the pipe. At the same time, the pipe diameter is adapted to the negative pressure suction flow requirements of the entire set of equipment, which can stably maintain the negative pressure value inside the pipe and meet the working conditions of continuous transfer of boiler fly ash.

[0042] Reference Figure 3The negative pressure pipe 71 is installed at an angle on the screw conveyor 4. The angled arrangement of the pipe can effectively reduce the deposition and accumulation of fly ash at the bottom of the pipe, reducing the probability of blockage. An oscillating diaphragm 711 is installed on the side wall of the negative pressure pipe 71. A striking block 712 is installed on the side of the oscillating diaphragm 711 away from the negative pressure pipe 71. The oscillating diaphragm 711 can make continuous reciprocating oscillation under the action of the air pressure difference inside and outside the negative pressure pipe 71, thereby driving the striking block 712 to move synchronously, continuously striking the pipe wall of the negative pressure pipe 71 and shaking off the fly ash attached to the inner side of the pipe wall. The oscillating diaphragm 711 is an elastic metal diaphragm with a structure that is flat at both ends and protruding in the middle. The negative pressure pipe 71 has an oscillation hole 713 for the oscillating diaphragm 711 to oscillate back and forth. The oscillating diaphragm 711 includes an elastic part 7111 that can make reciprocating oscillation and a mounting part 7112 for fixed connection with the negative pressure pipe 71. The striking block 712 has a rectangular block structure, with a metal rod at one end near the elastic part 7111. The metal rod is fixedly connected to the elastic part 7111 by welding.

[0043] Reference Figure 4 The inner wall of the oscillation hole 713 has an installation groove 7131 for mounting the mounting part 7112. Sealing rings 71121 are installed on opposite sides of the mounting part 7112 along the axial direction of the oscillation hole 713. The mounting part 7112 is provided with a fixing bolt 71122 for fixed connection with the mounting groove 7131. The mounting part 7112 has a through hole 71123 for the fixing bolt 71122 to pass through. The outer wall of the negative pressure pipe 71 has a threaded through hole 714 corresponding to the through hole 71123. The inner wall of the mounting groove 7131 has a threaded hole 71311 for threaded engagement with the fixing bolt 71122. The fixing bolt 71122 passes through the threaded through hole 714 on the outer wall of the negative pressure pipe 71 and also through the through hole 71123, threadedly engaging with the threaded hole 71311 on the inner wall of the mounting groove 7131, pressing the sealing ring 71121 tightly against the inner wall of the mounting groove 7131. The combination of the sealing ring 71121 and the fixing bolt 71122 effectively reduces the occurrence of air leakage and pressure loss in the negative pressure pipe 71, and stably maintains the negative pressure value inside the pipe.

[0044] When the ash storage tank of the ash storage tank truck 5 is full of fly ash, the negative pressure suction of the negative pressure fan 73 can be adjusted through the central control system of the negative pressure fan 73. This causes the air pressure difference generated inside and outside the negative pressure pipe 71 to drive the elastic part 7111 of the oscillating diaphragm 711 to retract into the negative pressure pipe 71. At the same time, it drives the striking block 712 to slide along the preset guide groove 7151, striking the outer wall of the negative pressure pipe 71. Then, the negative pressure fan 73 is adjusted again, causing the elastic part 7111 to protrude out of the oscillation hole 713 again, thereby moving the striking block 712 away from the negative pressure pipe 71. This operation can actively change the negative pressure value after the ash storage tank is full to remove any fly ash that may remain on the inner wall of the negative pressure pipe 71, enhancing the anti-clogging effect.

[0045] Reference Figure 3 and Figure 5 The negative pressure pipe 71 has a guide frame 715 installed on its side wall for guiding the striking block 712. Guide rails 7121 are installed on opposite sides of the striking block 712. The guide frame 715 has a guide groove 7151 on the side near the striking block 712 that slides and engages with the guide rails 7121. The guide frame 715 and the guide rails 7121 slide and engage to axially limit and guide the reciprocating motion of the striking block 712, ensuring that the striking block 712 always moves stably in a fixed direction.

[0046] Reference Figure 6 The sealing assembly 6 includes a bellows 61 for relieving pipeline stress, connecting parts 62 installed at opposite ends of the bellows 61, a sealing strip 64 for sealing, and a fixing assembly 63 for pressing the connecting parts 62 and the pipeline connection. Mounting rings 41 adapted to the connecting parts 62 are installed at the discharge port of the crusher 3, the inlet of the ash storage tank 5, and the openings of the feed and discharge pipes of the screw conveyor 4. The fixing assembly 63 clamps the connecting parts 62 and the mounting rings 41, and three sets of fixing assemblies 63 are circumferentially spaced along the axis of the bellows 61 to achieve a locking seal between the sealing assembly 6 and the pipeline. The bellows 61 effectively relieves the mechanical stress generated during equipment operation and compensates for pipeline installation deviations and operational deformations. The sealing strip 64, in conjunction with the pressing of the fixing assembly 63, achieves a tight fit and seal between the connecting parts 62 and the mounting rings 41, improving the sealing performance of the entire transfer system.

[0047] Reference Figure 7 and Figure 8The fixing assembly 63 includes a fixing base 631, a fixing plate 632 mounted on one end of the fixing base 631, a movable plate 633 rotatably mounted on the other end of the fixing base 631, and a drive handle 634 rotatably mounted on the side wall of the fixing base 631 for driving the movable plate 633 to press against the fixing plate 632. The fixing plate 632 is in contact with the side wall of the mounting ring 41. Rotating the drive handle 634 drives the movable plate 633 to rotate towards the fixing plate 632, pressing against the side wall of the connecting part 62. A drive block 6341 is mounted on the end of the drive handle 634 near the movable plate 633, and a transmission tooth 6332 that meshes with the drive block 6341 is mounted on the end of the movable plate 633 near the fixing base 631. The end of the movable plate 633 near the fixing base 631 has a rotating block 6331 for rotatably connecting with the fixing base 631, and the transmission teeth 6332 are evenly distributed circumferentially on the side wall of the rotating block 6331 along the axial direction of the rotating block 6331. The fixed base 631 is equipped with a limiting seat 6311 to restrict the wobbling of the drive handle 634. When the operator rotates the drive handle 634, causing the movable plate 633 to press against the side wall of the connecting part 62, the end of the drive handle 634 away from the movable plate 633 will be embedded in the groove of the limiting seat 6311, ensuring the pressing stability of the movable plate 633. The drive block 6341 and the transmission gear 6332 mesh stably, which can transmit the rotational torque of the drive handle 634 to the movable plate 633, ensuring uniform and sufficient pressing force, a firm sealing connection, and reducing the risk of loosening and pressure leakage due to long-term operation of the device. The limiting seat 6311 circumferentially limits the drive handle 634, restricting the wobbling and loosening of the drive handle 634, and ensuring the locking stability and reliability of the fixed component 63.

[0048] The implementation principle of the fly ash transfer and dust removal device in this embodiment is as follows: During fly ash transfer operations, the fly ash in the fly ash storage tank 1 is conveyed to the crusher 3 by the screw feeder 2, and then enters the screw conveyor 4, which conveys the fly ash to the ash storage tank 5. At the same time, the negative pressure fan 73 is started, creating a slight negative pressure in the negative pressure pipe 71, which continuously draws the dust from the discharge port of the screw conveyor 4 and the inlet of the ash storage tank 5 into the bag filter 72 for filtration and purification, and the clean air is discharged through the exhaust port. The negative pressure pipe 71 is inclined to reduce fly ash deposition, and the air pressure difference inside and outside the pipe continuously drives the oscillating diaphragm 711 to swing back and forth, which drives the striking block 712 to stably strike the pipe wall, shaking off the attached fly ash. When it is necessary to inspect and maintain the sealing component 6 or the dust removal component, the fixed component 63 can be loosened by turning the drive handle 634, and the sealing component 6 can be disassembled. Loosen the fixing bolts 71122 to remove the vibrating diaphragm 711 for cleaning and replacement. It can be stably adapted to various boiler fly ash transfer scenarios for a long time, taking into account dust removal effect, operational stability and ease of use.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fly ash transfer dedusting device, comprising a fly ash storage tank (1) for collecting fly ash, a screw feeder (2) arranged at the bottom of the fly ash storage tank (1), a crusher (3) arranged at the discharge port of the screw feeder (2), a screw conveyor (4) arranged at the discharge port of the crusher (3), and a fly ash storage tank truck (5) arranged at the discharge pipe of the screw conveyor (4), characterized in that, It also includes a sealing assembly (6) and a negative pressure balancing mechanism (7). The sealing assembly (6) is disposed on the feed pipe and discharge pipe of the screw conveyor (4) for sealing connection with the discharge port of the crusher (3) and the feed port of the ash storage tank (5). The negative pressure balancing mechanism (7) includes a negative pressure pipe (71) disposed on the side wall of the discharge pipe of the screw conveyor (4), a bag filter (72) disposed on the end of the negative pressure pipe (71) away from the screw conveyor (4), and a negative pressure fan (73) disposed at the exhaust port of the bag filter (72).

2. The fly ash transfer dust removal device according to claim 1, characterized in that, The air pressure range of the suction port of the negative pressure pipe (71) near the end of the screw conveyor (4) is 18 to 20 Pa.

3. A fly ash transfer dust removal device according to claim 2, characterized in that, The outer diameter of the negative pressure tube (71) ranges from 105 to 110 mm, and the inner diameter of the negative pressure tube (71) ranges from 95 to 100 mm.

4. A fly ash transfer dust removal device according to claim 3, characterized in that, The negative pressure pipe (71) is inclinedly arranged on the screw conveyor (4). An oscillating diaphragm (711) is provided on the side wall of the negative pressure pipe (71). A striking block (712) is provided on the side of the oscillating diaphragm (711) away from the negative pressure pipe (71). The oscillating diaphragm (711) performs reciprocating oscillating motion under the air pressure difference inside and outside the negative pressure pipe (71).

5. A fly ash transfer dust removal device according to claim 4, characterized in that, The negative pressure tube (71) has an oscillation hole (713) for the oscillating diaphragm (711) to oscillate back and forth. The oscillating diaphragm (711) includes an elastic part (7111) for reciprocating oscillation and a mounting part (7112) for fixed connection with the negative pressure tube (71). The striking block (712) is fixed to the elastic part (7111). The inner wall of the oscillation hole (713) has a mounting groove (7131) for the mounting part (7112) to be arranged.

6. A fly ash transfer dust removal device according to claim 5, characterized in that The mounting part (7112) is provided with sealing rings (71121) on both sides of the axial direction of the oscillation hole (713). The mounting part (7112) is provided with fixing bolts (71122) for fixed connection with the negative pressure pipe (71). The mounting part (7112) is provided with through holes (71123) for the fixing bolts (71122) to pass through. The outer wall of the negative pressure pipe (71) is provided with threaded through holes (714) corresponding to the through holes (71123). The inner wall of the mounting groove (7131) is provided with threaded holes (71311) that are threaded with the fixing bolts (71122).

7. A fly ash transfer dust removal device according to claim 6, characterized in that The negative pressure pipe (71) has a guide frame (715) on its side wall for guiding the striking block (712). The striking block (712) has guide rails (7121) on its opposite sides. The guide frame (715) has a guide groove (7151) on the side of the guide frame (715) that slides and engages with the guide rail (7121).

8. The fly ash transfer and dust removal device according to claim 1, characterized in that, The sealing assembly (6) includes a bellows (61) for relieving stress, a connecting part (62) disposed at opposite ends of the bellows (61), a sealing strip (64) disposed at the connecting part (62), and a fixing assembly (63) for pressing the connecting part (62). The discharge port of the crusher (3), the inlet of the ash storage tank car (5), and the openings of the feed pipe and discharge pipe of the screw conveyor (4) are all provided with mounting rings (41) corresponding to the connecting part (62). The fixing assembly (63) is used to clamp the connecting part (62) and the mounting ring (41).

9. A fly ash transfer and dust removal device according to claim 8, characterized in that, The fixing component (63) includes a fixing base (631), a fixing plate (632) disposed at one end of the fixing base (631), a movable plate (633) rotatably disposed at the other end of the fixing base (631), and a drive handle (634) rotatably disposed on the side wall of the fixing base (631) and used to drive the movable plate (633) to press against the fixing plate (632).

10. A fly ash transfer and dust removal device according to claim 9, characterized in that, The drive handle (634) is provided with a drive block (6341) at one end near the movable plate (633), the movable plate (633) is provided with a transmission tooth (6332) that meshes with the drive block (6341) at one end near the fixed seat (631), and the fixed seat (631) is provided with a limiting seat (6311) for limiting the shaking of the drive handle (634).

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