Dust removal device for coal powder preparation

Abstract

The application discloses a dust removal device for coal powder preparation, which comprises a box body, a vertical plate, a horizontal plate, an inclined plate, an ash bucket, a baffle, a bag dust removal group and a driving assembly, air inlets and air outlets are arranged at two ends of the box body respectively, the vertical plate, the horizontal plate and the inclined plate are fixed in the box body, the air inlets and the air outlets are located on the same side of the vertical plate, and the inclined plate is located between the vertical plate and the inner wall of the box body to separate the air inlets and the air outlets; the horizontal plate is provided with flow-through openings and filter hole groups located on the two sides of the vertical plate respectively, the flow-through openings are located directly above the inclined plate, a plurality of air outlets are arranged on the vertical plate and located below the inclined plate; the ash bucket is fixedly connected to the bottom of the box body, the baffle is arranged adjacent to the bottom of the box body and shields the ash bucket, the bag dust removal group is arranged at the bottom of the horizontal plate and located on one side of the filter hole group close to the vertical plate, and the driving assembly is used for opening and closing the baffle.

Description

Technical Field

[0001] This invention relates to the field of dust removal equipment technology, and in particular to a dust removal device for pulverized coal preparation. Background Technology

[0002] In industries such as power generation, metallurgy, and chemicals, pulverized coal preparation is a crucial step in ensuring the stable operation of subsequent combustion and reaction processes. However, the crushing, grinding, and conveying processes of pulverized coal generate a large amount of dust-laden gas. If this dust-laden gas is directly released into the environment, it will cause serious air pollution, harming not only the surrounding ecosystem but also adversely affecting human respiratory health. Furthermore, if the dust collected in the gas is not properly disposed of or undergoes secondary diffusion during cleaning, it will form solid waste pollution, further exacerbating the environmental damage.

[0003] To control dust pollution during pulverized coal preparation, various dust removal devices have emerged in existing technologies, such as bag filters and electrostatic precipitators. Among them, bag filters are widely used in pulverized coal preparation due to their high filtration accuracy and applicability to a wide range of dust types. Existing bag filter devices typically achieve dust removal through the combination of a housing, filter bags, and ash discharge structure. However, they still have significant shortcomings in practical applications, failing to fully meet the requirements of efficient dust removal and convenient operation and maintenance.

[0004] The existing dust removal devices mainly have the following problems: After the dust-laden gas enters the chamber, there is a lack of a reasonable airflow guidance structure, resulting in uneven airflow distribution within the chamber. In some areas, the filter components are overloaded, while in others, they are not fully utilized, resulting in low overall filtration efficiency. In some cases, some dust-laden gas is even discharged without being effectively filtered by the filter components, which cannot completely solve the air pollution problem. In addition, for the dust intercepted by the filter components, the existing dust discharge structure mostly relies on manual disassembly and cleaning at regular intervals, which is labor-intensive and inefficient for the workers. Summary of the Invention

[0005] To address the aforementioned problems, the present invention provides a dust removal device for pulverized coal preparation.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a dust removal device for pulverized coal preparation, comprising a housing, a vertical plate, a horizontal plate, an inclined plate, an ash hopper, a baffle, a bag filter assembly, and a drive assembly. The housing has an air inlet and an air outlet at both ends. The vertical plate, horizontal plate, and inclined plate are all fixed within the housing. The air inlet and air outlet are located on the same side of the vertical plate. The inclined plate is located between the vertical plate and the inner wall of the housing to separate the air inlet and air outlet. The horizontal plate has flow ports and filter hole groups located on both sides of the vertical plate. The flow ports are located directly above the inclined plate. The vertical plate has multiple air outlet holes located below the inclined plate. The ash hopper is fixed to the bottom of the housing. A baffle is located near the bottom of the housing and blocks the ash hopper opening. The bag filter assembly is located at the bottom of the horizontal plate and on the side of the filter hole group closest to the vertical plate. The drive assembly is used to open and close the baffle.

[0007] By adopting the above technical solution, the dust-laden gas generated during the coal powder preparation process enters the housing through the air inlet, and then enters the space between the top of the horizontal plate and the top of the housing through the flow outlet. It then passes through the filter hole group and the bag filter group in sequence. The clean gas is discharged from the housing through the air outlet and the air outlet. The dust particles in the dust-laden gas are intercepted by the bag filter group. The staff can open the baffle regularly through the drive component to clean the dust that has fallen on the baffle, thus ensuring the normal use of the equipment.

[0008] Furthermore, the baffle includes a first plate and a second plate. The first plate has a connection port, and the second plate has a connecting block that mates with the connection port. A first hole communicating with the connection port is provided through the first plate, and a second hole coaxial with the first hole is provided through the connecting block. The drive assembly includes a connecting shaft, an electric push rod, a connecting plate, a first transmission block, a second transmission block, and an arc-shaped track. The connecting shaft is clearance-fitted with the side wall of the housing, the first hole, and the second hole. The electric push rod is fixed to the outer wall of the housing. The connecting plate is fixed to the push rod end of the electric push rod. The side wall near the housing is fixed to the end of the connecting shaft; the first transmission block and the second transmission block are both fixed on the connecting shaft. The inner wall of the first hole is provided with a first spiral groove that cooperates with the first transmission block, and the inner wall of the second hole is provided with a second spiral groove that cooperates with the second transmission block. The first spiral groove and the second spiral groove are mirror images of each other about the vertical plane passing through the axis of the connecting shaft. The arc-shaped track is fixed to the inner wall of the housing. There are two of them, which are symmetrically distributed on both sides of the connecting shaft. The side of the first plate away from the connecting shaft and the side of the second plate away from the connecting shaft are respectively slidably engaged with the two arc-shaped tracks.

[0009] By adopting the above technical solution, when the baffle is opened periodically to clean the accumulated ash, the operator only needs to activate the electric push rod to drive the connecting plate and the connecting shaft to move synchronously. The first transmission block and the second transmission block move synchronously with the connecting shaft. Since the first transmission block slides with the first spiral groove in the first plate and the second transmission block slides with the second spiral groove in the second plate, and the first spiral groove and the second spiral groove are mirror images of each other, the first plate and the second plate slide with two arc-shaped tracks respectively, so that the first plate and the second plate rotate synchronously and in opposite directions, and the included angle between the first plate and the second plate gradually decreases, thereby completing the operation of opening the baffle to allow the accumulated ash to be unloaded from the ash hopper.

[0010] Furthermore, the filter assembly includes a first filter hole, a second filter hole, and a third filter hole. The first filter hole, the second filter hole, and the third filter hole are arranged sequentially from the bag filter assembly towards the side away from the vertical plate. The diameters of the first filter hole, the second filter hole, and the third filter hole increase sequentially, and the density of the first filter hole, the second filter hole, and the third filter hole also increases sequentially. The bag filter assembly consists of multiple dust collector bags arranged in a straight line. The bag filter assembly has three groups, which are located between the third filter hole and the second filter hole, between the second filter hole and the first filter hole, and on the side of the first filter hole closer to the vertical plate, respectively.

[0011] By adopting the above technical solution, the filter hole group composed of the first, second, and third filter holes effectively filters the dust-laden gas generated during the pulverized coal preparation process. The three sets of bag filter groups then perform bag filter dust removal on the gas entering between the horizontal plate and the baffle, significantly reducing the dust particle content in the gas. Finally, clean air is discharged through the air outlet and vent, completing the purification operation of the dust-laden gas generated during pulverized coal preparation. The dust removal device disclosed in this application can effectively filter and purify the dust-laden gas generated during the pulverized coal preparation process, reducing the dust content in the discharged gas and minimizing solid waste pollution and air pollution.

[0012] Furthermore, a shelf is fixed to the top of the horizontal plate, and through holes with the same diameter as the filter hole group are provided at the corresponding positions of the shelf; the top surface of the shelf is an inclined surface, and the height of the side of the top surface of the shelf away from the vertical plate is less than the height of the side closer to the vertical plate; a cleaning mechanism is provided on the box body, which includes a cleaning component and a linkage component; the cleaning component includes a drive rod and a scraper, the drive rod is located above the shelf, and the drive rod includes multiple spaced and fixed connecting rods and a bidirectional lead screw, the connecting rod at the end passes through the side wall of the box body and is rotatably connected; the bottom surface of the scraper is in contact with the top surface of the shelf, and the bidirectional lead screw passes through the scraper and is threadedly connected to it; the linkage component drives the connecting rod to rotate when the connecting shaft moves.

[0013] By adopting the above technical solution, during the periodic cleaning of dust accumulation on the baffle, the electric push rod drives the connecting shaft to rotate, and the bidirectional lead screw rotates synchronously with the connecting rod. This causes the scraper, which is threadedly connected to the bidirectional lead screw, to reciprocate. The bottom surface of the scraper abuts against the top surface of the shelf, thus cleaning the dust accumulation on the shelf surface. Because the shelf surface is inclined, the dust cleaned by the scraper rolls along the shelf surface under the action of airflow and eventually falls off through the larger-diameter third filter hole, ensuring the cleaning effect on the shelf.

[0014] Furthermore, the linkage assembly includes a sleeve, a main synchronous pulley, a driven rod, a driven synchronous pulley, a synchronous belt, a driving gear, and a driven gear. The sleeve is fixed to the first plate and is fitted onto the outside of the connecting shaft with a clearance fit. The sleeve passes through the housing and is rotatably connected to it. The main synchronous pulley is fixedly fitted onto the sleeve. The driven rod is rotatably mounted on the outer wall of the housing. The driven synchronous pulley is fixedly fitted onto the driven rod at the position corresponding to the main synchronous pulley. The synchronous belt meshes with both the driven and main synchronous pulleys. The driving gear is fixedly fitted onto the driven rod. The driven gear is fixedly fitted onto the connecting rod and located outside the housing. The driven gear meshes with the driving gear. The outer diameter of the driving gear is 4-10 times the outer diameter of the driven gear.

[0015] By adopting the above technical solution, after the electric push rod operates, the connecting shaft moves along its axial direction. As analyzed above, the first plate rotates during this process, and the sleeve rotates synchronously with the first plate. This causes the main synchronous pulley fixed to the sleeve, the synchronous belt meshing with the main synchronous pulley, the driven synchronous pulley meshing with the synchronous belt, the driven rod fixed to the driven synchronous pulley, the driving gear fixed to the driven rod, the driven gear meshing with the driving gear, the connecting rod fixed to the driven gear, and the double-acting screw fixed to the connecting rod to all rotate. This allows the scrapers to reciprocate, enabling each scraper to clean the accumulated dust on each layer. The outer diameter of the driving gear is 4-10 times the outer diameter of the driven gear; this larger transmission ratio ensures smooth scraper movement and completes the cleaning of the layers.

[0016] Furthermore, corrugated pipes are fixed between two adjacent scrapers and between the scraper and the inner wall of the box. The corrugated pipes are sleeved on the outside of the connecting rod and the double-acting screw.

[0017] By adopting the above technical solution, the bellows exhibits excellent elasticity. Sleeving over the connecting rod and the double-acting screw, it effectively protects the double-acting screw, preventing dust from getting stuck in the screw threads and affecting the scraper's movement. To extend the bellows' service life, it can be made of materials with high-temperature resistance.

[0018] Furthermore, the dust removal device for pulverized coal preparation includes multiple flow ports, and also includes baffles and valve assemblies. The baffles are fixed between the inner wall of the box and the side wall of the vertical plate away from the inclined plate, and their number is equal to the number of flow ports, and the baffles and flow ports are distributed at intervals. The number of valve assemblies is equal to the number of flow ports, and each assembly includes a cylinder and a valve plate. The cylinder is fixed to the top of the box, and the valve plate is fixed to the lower end of the piston rod of the cylinder. The position of the valve plate corresponds to the position of the flow port, and the diameter of the valve plate is larger than the diameter of the flow port.

[0019] By adopting the above technical solution, when the content of dust-laden gas to be treated is small, the staff can control the operation of the cylinder through the control center of the dust removal device, thereby selecting the number of valve plates to be opened. This helps to reduce the space through which the airflow passes through the inside of the chamber, ensuring purification efficiency and effect.

[0020] Furthermore, the dust removal device for pulverized coal preparation also includes a backflushing assembly, which includes a high-pressure gas storage tank, a main pipeline, branch pipelines, and solenoid valves. The high-pressure gas storage tank is fixed to the housing, and the main pipeline is fixed to and connected to the outlet of the high-pressure gas storage tank. The branch pipelines are fixed to and connected to the main pipeline, and their number is equal to the number of partitions and their positions correspond one-to-one. The solenoid valves are installed on the branch pipelines, and their number is equal to the number of branch pipelines.

[0021] By adopting the above technical solution, after the dust removal device has been in use for a period of time, the staff needs to control the cylinder operation through the control center of the dust removal device to control multiple valve plates to close simultaneously. At this time, the staff controls the solenoid valve to open, so that the high-pressure gas in the high-pressure storage tank can be input into the box through the main pipeline and branch pipeline. The high-pressure airflow enters the area below the horizontal plate through the first filter hole, the second filter hole, and the third filter hole, respectively, thereby cleaning the corresponding bag dust collector group, so as to shake off the dust on the bag dust collector group and ensure the subsequent dust removal effect of the device.

[0022] Furthermore, the interior of the housing is equipped with a monitor for monitoring the top of the baffles and the surface of the bag filter assembly.

[0023] By adopting the above technical solution and setting up the monitor, it is convenient for staff to monitor the dust on the top of the baffle and the surface of the bag filter group, so that staff can clean the dust on the surface of the baffle and the bag filter group in a timely manner.

[0024] Furthermore, a top inspection port is provided on the top of the enclosure, and a ladder extending to the top of the enclosure is provided on the outer wall of the enclosure.

[0025] By adopting the above technical solution, staff can climb to the top of the box using a ladder, which facilitates the inspection and maintenance of the internal parts.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. The dust-laden gas generated during the coal powder preparation process enters the housing through the air inlet, and then enters the space between the top of the horizontal plate and the top of the housing through the flow outlet. It then passes through the filter hole group and the bag dust collector group in sequence. The clean gas is discharged from the housing through the air outlet and the air outlet. The dust particles in the dust-laden gas are intercepted by the bag dust collector group. The staff can open the baffle regularly through the drive component to clean the dust that falls on the baffle, thus ensuring the normal use of the equipment.

[0028] 2. When the baffle is opened periodically to clean the accumulated ash, the operator only needs to activate the electric push rod to drive the connecting plate and the connecting shaft to move synchronously. The first transmission block and the second transmission block move synchronously with the connecting shaft. Since the first transmission block slides with the first spiral groove in the first plate and the second transmission block slides with the second spiral groove in the second plate, and the first spiral groove and the second spiral groove are mirror images of each other, the first plate and the second plate slide with the two arc-shaped tracks respectively, so that the first plate and the second plate rotate synchronously and in opposite directions. The included angle between the first plate and the second plate gradually decreases, thereby completing the operation of opening the baffle to allow the accumulated ash to be unloaded from the ash hopper. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram illustrating the internal structure of the box in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the filter pore group in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the baffle used in an embodiment of the present invention;

[0033] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0034] Figure 6 yes Figure 4 Enlarged view of point B in the middle;

[0035] Figure 7 This is a structural schematic diagram of an embodiment of the present invention to highlight the first transmission block and the second transmission block;

[0036] Figure 8 This is a structural schematic diagram of an embodiment of the present invention used to highlight the drive rod.

[0037] In the picture:

[0038] 1. Housing; 11. Ash Hopper; 12. Air Inlet; 13. Air Outlet; 2. Vertical Plate; 21. Air Outlet; 3. Horizontal Plate; 31. Flow Inlet; 4. Inclined Plate; 5. Baffle; 51. First Plate; 511. Connecting Port; 512. First Hole; 5121. First Spiral Groove; 52. Second Plate; 521. Connecting Block; 5211. Second Hole; 5212. Second Spiral Groove; 6. Bag Filter Assembly; 7. Drive Assembly; 71. Connecting Shaft; 72. Electric Push Rod; 73. Connecting Plate; 74. First Transmission Block; 75. Second Transmission Block; 76. Arc Track; 8. Filter Hole Assembly; 81. First Filter Hole; 82. Second Filter Hole; 83. Third Filter Hole 9. Shelf; 91. Through hole; 10. Cleaning mechanism; 101. Cleaning assembly; 1011. Drive rod; 10111. Connecting rod; 10112. Two-way lead screw; 1012. Scraper; 102. Linkage assembly; 1021. Sleeve; 1022. Main synchronous pulley; 1023. Driven rod; 1024. Driven synchronous pulley; 1025. Synchronous belt; 1026. Drive gear; 1027. Driven gear; 14. Bellows; 15. Partition; 16. Valve assembly; 161. Cylinder; 162. Valve plate; 17. Backflush assembly; 171. High-pressure air tank; 172. Main pipeline; 173. Branch pipeline; 18. Top inspection port; 19. Ladder. Detailed Implementation

[0039] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] like Figure 1-8 As shown in the embodiment of this application, a dust removal device for pulverized coal preparation is disclosed, including a housing 1, a vertical plate 2, a horizontal plate 3, an inclined plate 4, an ash hopper 11, a baffle 5, a bag filter assembly 6, and a drive assembly 7. An air inlet 12 and an air outlet 13 are respectively provided at both ends of the housing 1. The vertical plate 2, the horizontal plate 3, and the inclined plate 4 are all fixed inside the housing 1. The air inlet 12 and the air outlet 13 are both located on the same side of the vertical plate 2. The inclined plate 4 is located between the vertical plate 2 and the inner wall of the housing 1 to separate the air inlet 12. The horizontal plate 3 is provided with flow outlet 31 and filter hole group 8 located on both sides of the vertical plate 2. The flow outlet 31 is located directly above the inclined plate 4. The vertical plate 2 is provided with multiple air outlet holes 21 located below the inclined plate 4. The ash hopper 11 is fixed to the bottom of the box 1. The baffle 5 is set near the bottom of the box 1 and covers the opening of the ash hopper 11. The bag dust collector group 6 is set at the bottom of the horizontal plate 3 and located on the side of the filter hole group 8 close to the vertical plate 2. The drive component 7 is used to open and close the baffle 5.

[0041] Dust-laden gas generated during the pulverized coal preparation process enters the housing 1 through the air inlet 12, and then enters the space between the top of the horizontal plate 3 and the inner top of the housing 1 through the flow outlet 31. It then passes through the filter hole group 8 and the bag filter group 6 in sequence. The clean gas is discharged from the housing 1 through the air outlet 21 and the air outlet 13 (to ensure airflow, a fan can be installed at the air outlet 13 to ensure the smooth operation of dust removal). Dust particles in the dust-laden gas are intercepted by the bag filter group 6. The staff can periodically open the baffle 5 through the drive component 7 to clean the dust accumulated on the baffle 5, ensuring the normal use of the equipment.

[0042] The baffle 5 includes a first plate 51 and a second plate 52. The first plate 51 is provided with a connection port 511, and the second plate 52 is provided with a connecting block 521 that mates with the connection port 511. A first hole 512 communicating with the connection port 511 is provided through the first plate 51, and a second hole 5211 coaxial with the first hole 512 is provided through the connecting block 521. The drive assembly 7 includes a connecting shaft 71, an electric push rod 72, a connecting plate 73, a first transmission block 74, a second transmission block 75, and an arc-shaped track 76. The connecting shaft 71 is clearance-fitted with the side wall of the housing 1, the first hole 512, and the second hole 5211. The electric push rod 72 is fixed to the outer wall of the housing 1. The connecting plate 73 is connected to the push rod end of the electric push rod 72. The first transmission block 74 and the second transmission block 75 are both fixed on the connecting shaft 71. The inner wall of the first hole 512 is provided with a first spiral groove 5121 that cooperates with the first transmission block 74, and the inner wall of the second hole 5211 is provided with a second spiral groove 5212 that cooperates with the second transmission block 75. The first spiral groove 5121 and the second spiral groove 5212 are mirror images of each other about the vertical plane passing through the axis of the connecting shaft 71. The arc-shaped track 76 is fixed to the inner wall of the box 1. There are two of them and they are symmetrically distributed on both sides of the connecting shaft 71. The side of the first plate 51 away from the connecting shaft 71 and the side of the second plate 52 away from the connecting shaft 71 are respectively slidably engaged with the two arc-shaped tracks 76.

[0043] When the baffle 5 is opened periodically to clean the accumulated ash, the operator only needs to activate the electric push rod 72 to drive the connecting plate 73 and the connecting shaft 71 to move synchronously. The first transmission block 74 and the second transmission block 75 move synchronously with the connecting shaft 71. Since the first transmission block 74 is in sliding engagement with the first spiral groove 5121 in the first plate 51, and the second transmission block 75 is in sliding engagement with the second spiral groove 5212 in the second plate 52, and the first spiral groove 5121 and the second spiral groove 5212 are mirror images of each other, the first plate 51 and the second plate 52 are in sliding engagement with the two arc-shaped tracks 76 respectively, so that the first plate 51 and the second plate 52 rotate synchronously and in opposite directions, and the included angle between the first plate 51 and the second plate 52 gradually decreases, thereby completing the operation of opening the baffle 5 to allow the accumulated ash to be unloaded from the ash hopper 11.

[0044] The filter hole group 8 includes a first filter hole 81, a second filter hole 82, and a third filter hole 83. The first filter hole 81, the second filter hole 82, and the third filter hole 83 are arranged sequentially from the bag filter group 6 toward the side away from the vertical plate 2. The diameters of the first filter hole 81, the second filter hole 82, and the third filter hole 83 increase sequentially, and the density of the first filter hole 81, the second filter hole 82, and the third filter hole 83 increases sequentially. The bag filter group 6 is composed of multiple dust collector bags arranged in a straight line. The bag filter group 6 has three groups, which are located between the third filter hole 83 and the second filter hole 82, between the second filter hole 82 and the first filter hole 81, and on the side of the first filter hole 81 closer to the vertical plate 2, respectively.

[0045] The filter hole group 8, consisting of the first filter hole 81, the second filter hole 82, and the third filter hole 83, effectively filters the dust-laden gas generated during the pulverized coal preparation process. The three bag filter groups 6 then perform bag filter dust removal on the gas entering between the horizontal plate 3 and the baffle 5, significantly reducing the dust particle content in the gas. Finally, clean air is discharged through the air outlet 21 and the air outlet 13, completing the purification operation of the dust-laden gas generated during pulverized coal preparation. The dust removal device disclosed in this application can effectively filter and purify the dust-laden gas generated during the pulverized coal preparation process, reducing the dust content in the discharged gas and minimizing solid waste pollution and air pollution.

[0046] A shelf 9 is fixed to the top of the horizontal plate 3. The shelf 9 has through holes 91 with the same diameter as the filter hole group 8 at the corresponding positions. The top surface of the shelf 9 is inclined, and the height of the top surface of the shelf 9 away from the vertical plate 2 is less than the height of the side of the shelf 9 close to the vertical plate 2. A cleaning mechanism 10 is provided on the housing 1. The cleaning mechanism 10 includes a cleaning component 101 and a linkage component 102. The cleaning component 101 includes a drive rod 1011 and a scraper 1012. The drive rod 1011 is located above the shelf 9. The drive rod 1011 includes multiple spaced and fixed connecting rods 10111 and a bidirectional lead screw 10112. The connecting rods 10111 at the end pass through the side wall of the housing 1 and are rotatably connected. The bottom surface of the scraper 1012 is in contact with the top surface of the shelf 9. The bidirectional lead screw 10112 passes through the scraper 1012 and is threadedly connected to it. The linkage component 102 drives the connecting rods 10111 to rotate when the connecting shaft 71 moves.

[0047] During the periodic cleaning of dust accumulation on baffle 5, the electric push rod 72 drives the connecting shaft 71 to rotate, which in turn rotates the connecting rod 10111. The bidirectional lead screw 10112 rotates synchronously with the connecting rod 10111, causing the scraper 1012, which is threadedly connected to the bidirectional lead screw 10112, to reciprocate. The bottom surface of the scraper 1012 abuts against the top surface of the shelf 9, thereby cleaning the dust accumulation on the surface of the shelf 9. Since the surface of the shelf 9 is inclined, the dust cleaned by the scraper 1012 rolls along the surface of the shelf 9 under the action of airflow and eventually falls off through the larger-diameter third filter hole 83, ensuring the cleaning effect of the shelf 9.

[0048] The linkage assembly 102 includes a sleeve 1021, a main synchronous pulley 1022, a driven rod 1023, a driven synchronous pulley 1024, a synchronous belt 1025, a driving gear 1026, and a driven gear 1027. The sleeve 1021 is fixed to the first plate 51, sleeved on the outside of the connecting shaft 71 with clearance fit, and the sleeve 1021 passes through the housing 1 and is rotatably connected to it. The main synchronous pulley 1022 is fixedly sleeved on the sleeve 1021, and the driven rod 1023 is rotatably mounted on the outer wall of the housing 1. Stepping wheel 1024 is fixedly sleeved on the position corresponding to driven rod 1023 and main synchronous pulley 1022; synchronous belt 1025 meshes with both driven synchronous pulley 1024 and main synchronous pulley 1022; driving gear 1026 is fixedly sleeved on driven rod 1023; driven gear 1027 is fixedly sleeved on connecting rod 10111 and located outside housing 1, and driven gear 1027 meshes with driving gear 1026; the outer diameter of driving gear 1026 is 4-10 times the outer diameter of driven gear 1027.

[0049] After the electric push rod 72 operates, the connecting shaft 71 moves along its axial direction. As can be seen from the above analysis, the first plate 51 rotates during this process, and the sleeve 1021 rotates synchronously with the first plate 51. This causes the main synchronous pulley 1022 fixed to the sleeve 1021, the synchronous belt 1025 meshing with the main synchronous pulley 1022, the driven synchronous pulley 1024 meshing with the synchronous belt 1025, the driven rod 1023 fixed to the driven synchronous pulley 1024, the driving gear 1026 fixed to the driven rod 1023, the driven gear 1027 meshing with the driving gear 1026, the connecting rod 10111 fixed to the driven gear 1027, and the bidirectional lead screw 10112 fixed to the connecting rod 10111 to all rotate. This causes the scraper 1012 to reciprocate, so that each scraper 1012 can clean the accumulated dust on each layer plate 9. The outer diameter of the driving gear 1026 is 4-10 times that of the driven gear 1027. The larger transmission ratio ensures the smooth movement of the scraper 1012 and completes the cleaning of the shelf 9.

[0050] A bellows 14 is fixed between two adjacent scrapers 1012 and between the scraper 1012 and the inner wall of the housing 1. The bellows 14 is sleeved on the outside of the connecting rod 10111 and the double-acting screw 10112. The bellows 14 has good extensibility, and its sleeve on the outside of the connecting rod 10111 and the double-acting screw 10112 provides good protection for the double-acting screw 10112, preventing dust from getting stuck in the threads of the double-acting screw 10112 and affecting the movement of the scraper 1012. To extend the service life of the bellows 14, the bellows 14 can be made of a material with high-temperature resistance.

[0051] The flow port 31 is provided with multiple ports. The dust removal device for coal powder preparation also includes partition plates 15 and valve assemblies 16. The partition plates 15 are fixed between the inner wall of the housing 1 and the side wall of the vertical plate 2 away from the inclined plate 4. The number of partition plates 15 is equal to the number of flow ports 31, and the partition plates 15 and flow ports 31 are distributed at intervals. The number of valve assemblies 16 is equal to the number of flow ports 31. It includes cylinders 161 and valve plates 162. The cylinders 161 are fixed to the top of the housing 1. The valve plates 162 are fixed to the lower end of the piston rod of the cylinders 161. The position of the valve plates 162 corresponds to the position of the flow ports 31, and the diameter of the valve plates 162 is larger than the diameter of the flow ports 31.

[0052] When the dust content of the gas to be treated is small, the staff can control the operation of the cylinder 161 through the control center of the dust removal device, thereby selecting the number of valve plates 162 to be opened. This helps to reduce the space through which the airflow passes through the box 1, ensuring purification efficiency and effect.

[0053] The dust removal device for pulverized coal preparation also includes a backflushing assembly 17, which includes a high-pressure air storage tank 171, a main pipeline 172, a branch pipeline 173, and a solenoid valve (not shown in the figure). The high-pressure air storage tank 171 is fixed on the housing 1, and the main pipeline 172 is fixed and connected to the outlet of the high-pressure air storage tank 171. The branch pipelines 173 are fixed and connected to the main pipeline 172, and their number is equal to the number of partitions 15 and their positions correspond one-to-one. The solenoid valves are installed on the branch pipelines 173, and their number is equal to the number of branch pipelines 173.

[0054] After the dust removal device has been in use for a period of time, the staff needs to control the cylinder 161 through the control center of the dust removal device to control multiple valve plates 162 to close simultaneously. At this time, the staff controls the solenoid valve to open, so that the high-pressure gas in the high-pressure storage tank 171 can be input into the box 1 through the main pipe 172 and the branch pipe 173. The high-pressure airflow enters the area below the horizontal plate 3 through the first filter hole 81, the second filter hole 82, and the third filter hole 83 respectively, thereby cleaning the corresponding bag dust collector group 6, so as to shake off the dust on the bag dust collector group 6 and ensure the subsequent dust removal effect of the device.

[0055] The enclosure 1 houses a monitor (not shown in the figure) for monitoring the top of the baffle 5 and the surface of the bag filter assembly 6. The monitor is a conventional device in the prior art, such as a Sarix R IWP series vandal-resistant wedge camera with 5 megapixels, supporting wide dynamic range (WDR) and infrared night vision (50 meters), maintaining a clear image even in dusty environments. It is particularly suitable for medium-to-high dust environments such as factory perimeters, warehousing and logistics parks, transportation hubs, and dust collection units.

[0056] The monitoring device allows staff to monitor the dust on the top of baffle 5 and the surface of the bag filter assembly 6, so that staff can clean the dust on the surface of baffle 5 and bag filter assembly 6 in a timely manner.

[0057] The top of the enclosure 1 is provided with a top access port 18, and the outer wall of the enclosure 1 is provided with a ladder 19 extending to the top of the enclosure 1. Workers can climb to the top of the enclosure 1 via the ladder 19, which facilitates the inspection and maintenance of the internal parts of the enclosure 1.

[0058] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A dust removal device for pulverized coal preparation, characterized in that: It includes a housing (1), vertical plate (2), horizontal plate (3), inclined plate (4), ash hopper (11), baffle (5), bag filter assembly (6) and drive assembly (7). The housing (1) is provided with an air inlet (12) and an air outlet (13) at both ends. The vertical plate (2), horizontal plate (3) and inclined plate (4) are all fixed inside the box (1). The air inlet (12) and air outlet (13) are both located on the same side of the vertical plate (2). The inclined plate (4) is located between the vertical plate (2) and the inner wall of the box (1) to separate the air inlet (12) and the air outlet (13). The horizontal plate (3) is provided with flow ports (31) and filter hole groups (8) located on both sides of the vertical plate (2). The flow ports (31) are located directly above the inclined plate (4). The vertical plate (2) is provided with multiple air outlets (21) located below the inclined plate (4). The ash hopper (11) is fixed to the bottom of the box (1). The baffle (5) is located near the bottom of the box (1) and covers the opening of the ash hopper (11). The bag filter assembly (6) is located at the bottom of the horizontal plate (3) and on the side of the filter hole assembly (8) close to the vertical plate (2). The drive assembly (7) is used to open and close the baffle (5). The baffle (5) includes a first plate (51) and a second plate (52). The first plate (51) is provided with a connection port (511), and the second plate (52) is provided with a connecting block (521) that mates with the connection port (511). A first hole (512) communicating with the connection port (511) is provided through the first plate (51), and a second hole (5211) coaxial with the first hole (512) is provided through the connecting block (521). The drive assembly (7) includes a connecting shaft (71), an electric push rod (72), a connecting plate (73), a first transmission block (74), a second transmission block (75), and an arc-shaped track (76). The connecting shaft (71) is clearance-fitted with the side wall of the housing (1), the first hole (512), and the second hole (5211). The electric push rod (72) is fixed to the outer wall of the housing (1). The connecting plate (73) is fixed to the push rod end of the electric push rod (72), and its side wall near the housing (1) is fixed to the end of the connecting shaft (71). The first transmission block (74) and the second transmission block (75) are both fixed on the connecting shaft (71). The first hole (512) is clearance-fitted with the side wall of the housing (1), the first hole (512), and the second hole (5211). The inner wall of the first transmission block (74) is provided with a first spiral groove (5121) that cooperates with the first transmission block (74), and the inner wall of the second hole (5211) is provided with a second spiral groove (5212) that cooperates with the second transmission block (75). The first spiral groove (5121) and the second spiral groove (5212) are mirror images of each other about the vertical plane passing through the axis of the connecting shaft (71). The arc-shaped track (76) is fixed to the inner wall of the box (1). There are two of them and they are symmetrically distributed on both sides of the connecting shaft (71). The side of the first plate (51) away from the connecting shaft (71) and the side of the second plate (52) away from the connecting shaft (71) are respectively slidably engaged with the two arc-shaped tracks (76). The filter hole group (8) includes a first filter hole (81), a second filter hole (82) and a third filter hole (83). The first filter hole (81), the second filter hole (82) and the third filter hole (83) are arranged sequentially from the bag filter group (6) to the side away from the vertical plate (2). The diameters of the first filter hole (81), the second filter hole (82) and the third filter hole (83) increase sequentially, and the density of the first filter hole (81), the second filter hole (82) and the third filter hole (83) increases sequentially. The bag filter assembly (6) consists of multiple dust filter bags arranged in a straight line. The bag filter assembly (6) has three sets, which are located between the third filter hole (83) and the second filter hole (82), between the second filter hole (82) and the first filter hole (81), and on the side of the first filter hole (81) near the vertical plate (2).

2. The dust removal device for pulverized coal preparation according to claim 1, characterized in that: A shelf (9) is fixed on the top of the horizontal plate (3). A through hole (91) with the same diameter as the filter hole group (8) is provided on the shelf (9) at the position corresponding to the filter hole group (8). The top surface of the shelf (9) is an inclined surface. The height of the top surface of the shelf (9) away from the vertical plate (2) is less than the height of the side of the shelf (9) close to the vertical plate (2). A cleaning mechanism (10) is provided on the housing (1). The cleaning mechanism (10) includes a cleaning component (101) and a linkage component (102). The cleaning component (101) includes a drive rod (1011) and a scraper (1012). The drive rod (1011) is located above the shelf (9). The drive rod (1011) includes multiple spaced and fixed connecting rods (10111) and a two-way screw (10112). The connecting rod (10111) at the end passes through the side wall of the housing (1) and is rotatably connected. The bottom surface of the scraper (1012) is in contact with the top surface of the shelf (9). The two-way screw (10112) passes through the scraper (1012) and is threadedly connected to it. The linkage component (102) drives the connecting rod (10111) to rotate when the connecting shaft (71) moves.

3. The dust removal device for pulverized coal preparation according to claim 2, characterized in that: The linkage assembly (102) includes a sleeve (1021), a main synchronous pulley (1022), a driven rod (1023), a driven synchronous pulley (1024), a synchronous belt (1025), a driving gear (1026), and a driven gear (1027); the sleeve (1021) is fixed on the first plate (51), and is sleeved on the outside of the connecting shaft (71) with clearance fit; the sleeve (1021) passes through the housing (1) and is rotatably connected to it; the main synchronous pulley (1022) is fixedly sleeved on the sleeve (1021), and the driven rod (1023) is driven on the first plate (51). 23) Rotatably mounted on the outer wall of the housing (1), the driven gear (1024) is fixedly sleeved on the driven rod (1023) at the position corresponding to the main driven gear (1022); the synchronous belt (1025) meshes with both the driven gear (1024) and the main driven gear (1022), the driving gear (1026) is fixedly sleeved on the driven rod (1023), the driven gear (1027) is fixedly sleeved on the connecting rod (10111) and located outside the housing (1), and the driven gear (1027) meshes with the driving gear (1026).

4. The dust removal device for pulverized coal preparation according to claim 2, characterized in that: A corrugated pipe (14) is fixed between two adjacent scrapers (1012) and between the scraper (1012) and the inner wall of the box (1). The corrugated pipe (14) is sleeved on the outside of the connecting rod (10111) and the double-acting screw (10112).

5. A dust removal device for pulverized coal preparation according to claim 2, characterized in that: The flow port (31) is provided in multiple ways. The dust removal device for coal powder preparation also includes a partition (15) and a valve assembly (16). The partition (15) is fixed between the inner wall of the box (1) and the side wall of the vertical plate (2) away from the inclined plate (4). The number of partitions (15) is equal to the number of flow ports (31), and the partitions (15) and flow ports (31) are distributed at intervals. The number of valve assemblies (16) is equal to the number of flow ports (31), and includes a cylinder (161) and a valve plate (162). The cylinder (161) is fixed to the top of the housing (1), and the valve plate (162) is fixed to the lower end of the piston rod of the cylinder (161). The position of the valve plate (162) corresponds to the position of the flow port (31), and the diameter of the valve plate (162) is larger than the diameter of the flow port (31).

6. The dust removal device for pulverized coal preparation according to claim 5, characterized in that: It also includes a backflush assembly (17), which includes a high-pressure gas tank (171), a main pipeline (172), a branch pipeline (173), and a solenoid valve. The high-pressure gas tank (171) is fixed on the housing (1), and the main pipeline (172) is fixed and connected to the outlet of the high-pressure gas tank (171). The branch pipeline (173) is fixed and connected to the main pipeline (172), and its number is equal to the number of partitions (15) and their positions correspond one-to-one. The solenoid valve is set on the branch pipeline (173), and its number is equal to the number of branch pipelines (173).

7. The dust removal device for pulverized coal preparation according to claim 1, characterized in that: The housing (1) is equipped with a monitor for monitoring the top of the baffle (5) and the surface of the bag filter assembly (6).

8. The dust removal device for pulverized coal preparation according to claim 1, characterized in that: The top of the enclosure (1) is provided with a top inspection port (18), and the outer wall of the enclosure (1) is provided with a ladder (19) extending to the top of the enclosure (1).

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