A dust collector for an electric steel furnace

Abstract

This invention relates to the field of dust collector technology, specifically disclosing a dust collector for an electric steel furnace, comprising: a dust collector shell, a top plate inside the dust collector shell, multiple dust collection units on the top plate, each dust collection unit including a support ring disposed on the top plate, multiple support frames circumferentially disposed on the support rings, and filter bags sleeved on the outer sides of the support frames; a cleaning module is also disposed inside the dust collector shell; the cleaning module includes multiple sealing rings respectively sleeved on the outer sides of the filter bags, the sealing rings being coaxial with the support rings and capable of sliding along their axial direction, and a lifting cylinder coaxially disposed below the sealing rings. The beneficial effects of this invention are: when the compressed air reaches the lifting cylinder, the energy of the compressed air is effectively enhanced. This enhanced power ensures that the lifting cylinder smoothly reaches the bottom of the filter bag. In this way, the cleaning effect of compressed air on the bottom part of the filter bag is significantly improved, ensuring a more thorough and efficient cleaning effect in this area.

Description

Technical Field

[0001] This invention relates to the field of dust collector technology, and more specifically to a dust collector for an electric steel furnace. Background Technology

[0002] A baghouse dust collector typically consists of three parts: a baghouse, a cleaning mechanism, and a dust hopper. Its advantages include high dust removal efficiency, a wide range of air volume handling capacity, simple structure, convenient maintenance and operation, lower cost than electrostatic precipitators, ability to operate at temperatures above 200℃, insensitivity to dust characteristics, and unaffected by dust or electrical resistance. Based on the shape of the filter bags, they are classified as cylindrical or flat. The working principle is to use porous bag-shaped filter elements (cloth bags) to capture dust from dust-laden gas. When the dust layer on the filter bag surface becomes thick enough, the filter bags must be cleaned to ensure the air permeability required for continuous operation. Baghouse dust collectors are mainly used for flue gas dust removal in industrial furnaces and kilns; filtration and purification of dust-laden air in work areas and exhaust gas from pneumatic conveying systems; separation of dust or clean gas as a product from gas-solid two-phase flows; and suitable for collecting fine, dry, non-fibrous dust. When dust-laden gas enters the bag filter, large and heavy dust particles settle down due to gravity and fall into the ash hopper. When the gas containing finer dust particles passes through the filter material, the dust is trapped, thus purifying the gas.

[0003] Chinese patent CN118217732B discloses a bag-type pulse dust collector, belonging to the field of industrial dust removal equipment technology. It includes an external frame, an inlet frame, and an outlet frame; it also includes: a moving platform slidably disposed on one side of the inlet frame, with multiple mounting slots on the moving platform; a filter assembly comprising multiple filter units, each detachably mounted in its corresponding mounting slot; and a lifting assembly disposed on one side of the outlet frame, including a lifting frame positioned relative to the filter units. A lifting device is located on one side of the lifting frame, and the lifting frame, driven by the lifting device, can carry the filter units out of their mounting slots. This patent employs a multi-stage split-type structural design, allowing for automatic extraction of the internal structure, reducing the difficulty of internal inspection and maintenance of the bag-type pulse dust collector. Furthermore, when replacing the internal filter bags, the back-blowing pipe and filter cage can be automatically removed, improving filter bag replacement efficiency.

[0004] During pulse jet cleaning, the dust collector injects compressed air into the filter bag to form a shock wave, which periodically cleans the dust layer attached to the outer surface of the filter bag. After the shock wave is injected from the top opening of the filter bag, its energy gradually decreases as it propagates longitudinally along the filter bag. This energy attenuation effect results in a significant longitudinal gradient difference in the cleaning effect: the bag opening area near the jet nozzle directly bears the initial impact energy and can effectively peel off the high-resistance dust layer; while the bag bottom area far from the jet nozzle, because the shock wave energy decreases to below the critical threshold, often cannot completely remove the deeply embedded fine dust particles, ultimately forming a weak area at the bottom of the cleaning efficiency, resulting in incomplete cleaning at the bottom of the filter bag. Summary of the Invention

[0005] This invention provides a dust collector for steel electric furnaces, aiming to solve the problem in related technologies where, after the shock wave is injected from the top opening of the filter bag, its energy gradually attenuates as it propagates longitudinally along the filter bag. This energy attenuation effect leads to a significant longitudinal gradient difference in the dust removal effect: the bag opening area near the nozzle directly bears the initial impact energy and can effectively peel off the high-resistance dust layer; while the bag bottom area far from the nozzle, because the shock wave energy attenuates to below the critical threshold, often cannot completely remove the deeply embedded fine dust particles, ultimately forming a weak bottom area in terms of dust removal efficiency, thus causing incomplete dust removal at the bottom of the filter bag.

[0006] The present invention discloses a dust collector for an electric steel furnace, comprising: a dust collector shell, a top plate inside the dust collector shell, a plurality of dust collection units on the top plate, each dust collection unit including a bearing ring disposed on the top plate, a plurality of supporting frames disposed circumferentially on the bearing ring, a filter bag sleeved on the outside of the supporting frame, and a cleaning module inside the dust collector shell; the cleaning module includes a plurality of sealing rings respectively sleeved on the outside of the filter bag, the sealing rings being coaxial with the bearing rings and capable of sliding along their axial direction, a lifting cylinder coaxially disposed below the sealing rings, a plurality of downwardly inclined air blowing holes being opened on the outer wall of the lifting cylinder, a plurality of blowpipes disposed above the top plate, the blowpipes being provided with a plurality of nozzles respectively corresponding to the filter bags, a plurality of bottom plates respectively corresponding to the dust collection units being installed inside the dust collector shell, the bottom plates being capable of sliding up and down, a plurality of telescopic cylinders respectively sleeved on the bottom plates, one end of the telescopic cylinders being connected to the top plate and the other end being connected to the bottom plate, the outer side of the sealing rings abutting against the inner wall of the telescopic cylinders, and the inner side of the sealing rings pressing the filter bags tightly against the supporting frames.

[0007] Beneficial Effects: The first motor drives the drive rod to rotate, which in turn drives all the drive wheels to rotate. The drive wheels then drive the transmission gears, which in turn drive the first screw to rotate, causing the sealing ring to descend. As the sealing ring descends, its outer side remains in close contact with the inner wall of the telescopic cylinder, while its inner side presses the filter bag tightly against the support frame. This creates a relatively sealed annular cavity above the sealing ring. When compressed air enters the filter bag and moves downwards, it causes radial deformation, shaking off dust adhering to the outer side of the filter bag. Some of the compressed air passes through the filter bag and enters the annular cavity. Because the annular cavity is relatively sealed, the potential energy of the compressed air is not excessively consumed, thus retaining most of its potential energy and allowing it to continue moving downwards. As the sealing ring and the lifting cylinder continue to move downwards, the volume of the annular cavity gradually increases. During this process, the energy loss of the compressed air is significantly reduced during the downward movement of the sealing ring. Therefore, the energy of the compressed air is effectively enhanced when it reaches the position of the lifting cylinder. This enhanced power ensures that the lifting cylinder smoothly reaches the bottom of the filter bag. In this way, the cleaning effect of compressed air on the bottom part of the filter bag is significantly improved, ensuring a more thorough and efficient cleaning of this area.

[0008] Preferably, each of the sealing rings is threaded with a first screw, the first screw is arranged vertically and its upper end rotates on the top plate, a transmission gear is fixedly installed on the upper end of the first screw, and multiple sets of drive structures for driving the transmission gear to rotate are also installed above the top plate.

[0009] Its effect is that the drive structure drives the transmission gear to rotate, which in turn causes the first screw to rotate, and finally causes the sealing ring to rise and fall.

[0010] Preferably, the drive structure includes a mounting base mounted on the top plate, a drive rod rotatably mounted on the mounting base, and multiple drive wheels spaced apart along the length of the drive rod, with each drive wheel meshing with a corresponding transmission gear.

[0011] Preferably, each of the base plates is threaded with a vertically arranged second screw, the upper end of the second screw is rotatably engaged with the top plate, and a second motor connected to the second screw is installed on the top plate.

[0012] Its effect is that the second motor drives the second screw to rotate, which enables the second screw to lift and lower the base plate, ultimately controlling the expansion and contraction of the telescopic cylinder.

[0013] Preferably, the telescopic cylinder is a corrugated pipe made of rubber.

[0014] Preferably, each of the air holes is provided with an upper cover and a lower cover. The upper cover is located above the lower cover, and the upper cover and the lower cover are arranged at an angle. Along the axis away from the lifting cylinder, the upper cover gradually tilts downward and the lower cover gradually tilts upward, and the length of the upper cover is greater than the length of the lower cover.

[0015] Its effect is as follows: the purpose is to ensure that when the pulse gas reaches the lifting cylinder and is blown out from the air hole, it is guided by the upper and lower baffles so that the pulse gas can be sprayed diagonally downward, thereby blowing the dust that has been peeled off from the filter bag downward and preventing the dust from floating upward. At the same time, the setting of the lower baffle can also prevent the dust from entering the lifting cylinder in the opposite direction.

[0016] Preferably, the sealing ring is made of rubber.

[0017] Its effect is to ensure a tight fit between the outer side of the sealing ring and the telescopic cylinder, as well as a tight fit between the inner side of the sealing ring and the filter bag.

[0018] Preferably, a partition plate is provided in the cavity below the top plate, which divides the lower cavity into a filter chamber and a clean air channel. The dust collector shell is provided with an air inlet pipe that communicates with the filter chamber, and the dust collector shell is also provided with an exhaust pipe that communicates with the clean air channel. Ventilation holes are opened on the top plate at positions corresponding to the clean air channel.

[0019] Preferably, a control cylinder is installed on the outer shell of the dust collector, and the telescopic part of the control cylinder is provided with a sealing plate, which corresponds to the vent hole and is used to control the opening and closing of the vent hole.

[0020] Preferably, the bottom of the filter chamber is provided with multiple conical collection chambers, and the top of the collection chambers is connected to the filter chamber.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0022] The first motor drives the drive rod to rotate, which in turn drives all the drive wheels to rotate. The drive wheels then drive the transmission gears, which in turn drive the first screw to rotate, causing the sealing ring to descend. As the sealing ring descends, its outer side remains in close contact with the inner wall of the telescopic cylinder, while its inner side presses the filter bag tightly against the support frame. This creates a relatively sealed annular cavity above the sealing ring. When compressed air enters the filter bag and moves downwards, it causes radial deformation, shaking off dust adhering to the outer side of the filter bag. Some of the compressed air passes through the filter bag and enters the annular cavity. Because the annular cavity is relatively sealed, the potential energy of the compressed air is not excessively consumed, thus retaining most of its potential energy and allowing it to continue moving downwards. As the sealing ring and the lifting cylinder continue to move downwards, the volume of the annular cavity gradually increases. During this process, the energy loss of the compressed air is significantly reduced during the descent of the sealing ring. Therefore, the energy of the compressed air is effectively enhanced when it reaches the position of the lifting cylinder. This enhanced power continues until the lifting cylinder successfully reaches the bottom of the filter bag. In this way, the cleaning effect of compressed air on the bottom part of the filter bag is significantly improved, ensuring that the filter bag is cleaned more thoroughly and efficiently in this area.

[0023] The telescopic cylinder effectively controls the dust cleaned from the filter bags, preventing it from flying around and adhering to other filter bags. This not only avoids cross-contamination between different filter bags but also greatly improves the dust cleaning efficiency of the filter bags. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is the left view of the present invention.

[0026] Figure 3 For the present invention Figure 2 Sectional view of AA.

[0027] Figure 4 For the present invention Figure 2 A cross-sectional view of BB.

[0028] Figure 5 This is a top view of the interior of the clean air chamber of the present invention.

[0029] Figure 6 This is an exploded view of the telescopic cylinder and filter bag of the present invention.

[0030] Figure 7 This is a cross-sectional view of the sealing ring of the present invention.

[0031] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0032] Figure 9 This is an exploded view of the support frame, filter bag, and sealing ring of the present invention.

[0033] Figure label:

[0034] 10. Dust collector casing; 11. Top plate; 12. Clean air chamber; 13. Partition plate; 14. Filter chamber; 15. Clean air passage; 16. Inlet pipe; 17. Exhaust pipe; 18. Collection bin; 19. Inspection cover; 20. Vent hole; 21. Control cylinder; 22. Sealing plate; 23. Blowpipe; 30. Mounting hole; 31. Bearing ring; 32. Support frame; 33. Filter bag; 34. Mounting ring; 35. Bag body; 40. Sealing ring; 41. Lifting cylinder; 42. Air blowing hole; 43. Upper cover plate; 44. Lower cover plate; 45. First screw; 46. Transmission gear; 50. Mounting base; 51. Drive rod; 52. First motor; 53. Drive wheel; 60. Base plate; 61. Second screw; 62. Second motor; 63. Telescopic cylinder. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] like Figures 1 to 9 As shown, a specific embodiment of a dust collector for an electric steel furnace according to the present invention includes a support module, a dust removal module, and a cleaning module.

[0037] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the supporting module includes a dust collector housing 10, a top plate 11, a clean air chamber 12, a partition plate 13, a filter chamber 14, a clean air passage 15, an air inlet pipe 16, an exhaust pipe 17, a collection bin 18, and a maintenance cover 19.

[0038] The dust collector housing 10 has a square box structure. Inside the dust collector housing 10, there is a top plate 11. The top plate 11 is horizontally arranged and divides the internal chamber of the dust collector housing 10 into upper and lower chambers. The upper chamber is the clean air chamber 12, and the lower chamber is equipped with a partition plate 13. The partition plate 13 is vertically arranged, with its upper end abutting against the bottom of the top plate 11 and its lower end connecting to the bottom wall of the internal chamber of the dust collector housing 10. Thus, the partition plate 13 divides the lower chamber into a filter chamber 14 and a clean air channel 15. The filter chamber 14 and the clean air channel 15 are arranged in the front-to-back direction. The dust removal module is installed in the filter chamber 14 to filter the dust-laden gas.

[0039] An air inlet pipe 16 is located on the left side of the dust collector housing 10. The air inlet pipe 16 is connected to the interior of the filter chamber 14, allowing dust-laden gas to enter the filter chamber 14 through the air inlet pipe 16. After being filtered by the dust removal module, the filtered gas enters the clean air chamber 12, which is connected to the clean air channel 15. The filtered gas then enters the clean air channel 15. An exhaust pipe 17 is located on the right side of the dust collector housing 10. The exhaust pipe 17 is connected to the clean air channel 15, and the filtered gas is finally discharged from the exhaust pipe 17 into the atmosphere.

[0040] like Figure 4 and Figure 5 As shown, multiple ventilation holes 20 are spaced out at corresponding positions along the left-right direction on the top plate 11 and the clean air channel 15. These ventilation holes 20 extend vertically through the top plate 11, effectively connecting the clean air channel 15 and the clean air chamber 12. In this embodiment, the ventilation holes 20 are designed as circular structures, but in other embodiments, the shape of the ventilation holes 20 is not limited to circular and can be designed in various ways according to specific needs.

[0041] Multiple control cylinders 21 are fixedly installed above the dust collector housing 10. These control cylinders 21 are respectively configured to correspond one-to-one with the vent holes 20, ensuring that each vent hole 20 can be controlled. The telescopic part of the control cylinder 21 extends downward into the interior of the clean air chamber 12, and the axis of the telescopic part of the control cylinder 21 extends vertically. A sealing plate 22 is fixedly installed on the telescopic part of the control cylinder 21. The diameter of the sealing plate 22 is larger than the diameter of the vent hole 20, which is designed to ensure a sealing effect. In addition, a rubber gasket is specially provided at the bottom of the sealing plate 22, which further enhances the sealing effect.

[0042] When the control cylinder 21 lowers the sealing plate 22, the vent 20 is completely closed, preventing the filtered gas in the clean air chamber 12 from entering the clean air channel 15. Conversely, when the sealing plate 22 rises under the action of the control cylinder 21, the vent 20 is opened, allowing the filtered gas in the clean air chamber 12 to smoothly enter the clean air channel 15 and finally be discharged through the exhaust pipe 17, completing the entire gas purification and discharge process.

[0043] The bottom of the filter chamber 14 is provided with multiple collection chambers 18, all of which adopt a conical structure design to ensure efficient collection and storage of settled dust. It is worth noting that the tops of these conical collection chambers 18 maintain good communication with the filter chamber 14, ensuring that dust can smoothly enter the collection chambers 18. Specifically, in this embodiment, the collection chambers 18 are arranged in two rows, front and back, with three collection chambers 18 evenly arranged in each row along the left-right direction. The arrangement of the collection chambers 18 is adapted to the dust removal module, which will be described in detail later.

[0044] Multiple inspection covers 19 are installed on the upper surface of the dust collector housing 10. The purpose of the inspection covers 19 is to facilitate technicians in performing routine inspections, repairs, and maintenance on various components inside the clean air chamber 12. Specifically, the presence of the inspection covers 19 greatly simplifies the maintenance process, allowing maintenance personnel to easily open the inspection covers 19 and directly access the components inside the clean air chamber 12, thereby efficiently performing necessary maintenance operations and ensuring the normal operation and service life of the equipment.

[0045] like Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 as well as Figure 9 As shown, the dust removal module is installed on the top plate 11. The module contains a total of six high-efficiency dust removal units, arranged in two rows. Specifically, each row has three dust removal units evenly spaced along the left-right direction. More importantly, each dust removal unit corresponds one-to-one with a collection chamber 18, ensuring that the collection chamber 18 can collect the dust generated by each unit individually. Furthermore, each dust removal unit operates independently without interference or influence on the others. This design greatly facilitates the cleaning of each dust removal unit during operation, improving cleaning efficiency and ensuring the stable operation and reliability of the entire dust removal system.

[0046] Each dust removal unit includes a bearing ring 31, a support frame 32, a filter bag 33, a mounting ring 34, and a bag body 35. Multiple vertically penetrating mounting holes 30 are provided on the top plate 11 corresponding to each dust removal unit. In this embodiment, the mounting holes 30 are circular, and are arranged in three rows, with four holes spaced apart on the left and right sides of each row.

[0047] Each mounting hole 30 is provided with a bearing ring 31 above it. The bearing ring 31 is a ring structure and is coaxially arranged with the mounting hole 30. In this embodiment, the inner diameter of the bearing ring 31 is smaller than the diameter of the mounting hole 30, and the outer diameter of the bearing ring 31 is larger than the diameter of the mounting hole 30.

[0048] Multiple support frames 32 are fixedly mounted on the lower surface of the bearing ring 31, and these support frames 32 are evenly distributed along the circumference of the bearing ring 31. The support frames 32 are cylindrical rod-shaped structures, and their axes extend vertically. That is, the support frames 32 all extend downward through the mounting holes 30 into the filter chamber 14. The circumferential support frames 32 all abut against the inner wall of the mounting holes 30, thereby ensuring the stability of the support frames 32 and preventing them from shaking.

[0049] A filter bag 33 is fitted onto the outside of the support frame 32. Supported by the support frame 32, the filter bag 33 effectively maintains its proper shape and structure, ensuring that it achieves the expected filtration effect and guarantees the smooth operation of the filtration process. Specifically, the filter bag 33 consists of two main parts: an mounting ring 34 and a bag body 35. The mounting ring 34 and the bag body 35 are tightly connected to form a single integrated structure. The bag body 35 is a cylindrical shape with one open end, facilitating the smooth entry and exit of gas. The mounting ring 34 is installed at the opening at the top of the bag body 35, ensuring the overall sealing and stability of the filter bag 33. Furthermore, the mounting ring 34 is not only fixedly installed on the lower surface of the support ring 31 but also coaxially arranged with it. This coaxial arrangement further enhances the coordination and fit between the filter bag 33 and the support ring 31.

[0050] Dust-laden gas can enter the filter chamber 14 through the inlet pipe 16, and then be filtered by the bag body 35. The filtered gas enters the clean air chamber 12 through the opening at the top of the bag body 35. The clean air chamber 12 is connected to the clean air channel 15, and the filtered gas will enter the clean air channel 15. Finally, the filtered gas is discharged into the atmosphere through the exhaust pipe 17. The dust in the gas will be isolated on the outer side of the bag body 35, and the last part of the dust will fall into the corresponding collection chamber 18 below.

[0051] After prolonged and continuous operation, a relatively thick layer of dust will inevitably accumulate on the sides of the bag 35. Once this thick dust layer forms, it will significantly negatively impact the filtration efficiency of the bag 35, drastically reducing it and potentially causing it to fail completely. The main function of the cleaning module is to effectively remove this dust from the outer surface of the bag 35. The cleaning module can promptly remove the dust from the outside of the bag 35, restoring its normal filtration function and ensuring the normal operation and filtration effect of the entire system remain unaffected.

[0052] like Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 as well as Figure 9 As shown, the cleaning module includes a blow pipe 23, a sealing ring 40, a lifting cylinder 41, an upper cover plate 43, a lower cover plate 44, a first screw 45, a transmission gear 46, a mounting base 50, a drive rod 51, a first motor 52, a drive wheel 53, a base plate 60, a second screw 61, a second motor 62, and a telescopic cylinder 63.

[0053] Multiple blowpipes 23 are arranged at intervals along the front-to-back direction in the clean air chamber 12. The blowpipes 23 are arranged horizontally, and the axis of the blowpipes 23 extends along the left-to-right direction. Multiple nozzles are arranged at intervals along the length of the bottom of the blowpipes 23. The multiple blowpipes 23 in the front-to-back direction correspond one-to-one with multiple rows of filter bags 33 in the front-to-back direction, and the multiple nozzles at the bottom of the blowpipes 23 correspond one-to-one with multiple filter bags 33 in each row.

[0054] A pulse valve is also connected to the blowpipe 23. The main function of the pulse valve is to control and regulate the flow and pressure of compressed air. When the system starts the dust removal program, compressed air is injected at high speed into the filter bag 33 through the nozzle on the blowpipe 23. The dust is peeled off from the filter bag 33 by the vibration of the airflow and the action of the reverse airflow, thus completing the dust removal process.

[0055] Each filter bag 33 is fitted with a sealing ring 40 on its outer side. The sealing ring 40 has a ring structure and is made of flexible rubber. The sealing ring 40 can slide along the length of the filter bag 33. Specifically, the inner surface of the sealing ring 40 abuts against multiple circumferential support frames 32. That is, the inner surface of the sealing ring 40 presses the bag body 35 of the filter bag 33 tightly against the support frames 32 (e.g., ...). Figure 8 (As shown).

[0056] A lifting cylinder 41 is coaxially fixedly installed at the bottom of the sealing ring 40. Multiple air blowing holes 42 are provided on the lifting cylinder 41 along its circumference, and the air blowing holes 42 are arranged in a multi-layer array along the axial direction of the lifting cylinder 41.

[0057] An upper baffle 43 and a lower baffle 44 are provided on the outer side of each air blowing hole 42. The upper baffle 43 is located above the lower baffle 44, and the upper baffle 43 and the lower baffle 44 are arranged at an angle. Along the axis away from the lifting cylinder 41, the upper baffle 43 gradually tilts downward and the lower baffle 44 gradually tilts upward. The length of the upper baffle 43 is greater than the length of the lower baffle 44. That is, the upper baffle 43 covers the lower baffle 44. The purpose of this arrangement is to ensure that when the pulse gas reaching the lifting cylinder 41 is blown out of the air blowing hole 42, it is guided by the upper baffle 43 and the lower baffle 44, so that the pulse gas can be sprayed obliquely downward, thereby blowing the dust that has been peeled off from the filter bag 33 downward and preventing the dust from floating upward. At the same time, the arrangement of the lower baffle 44 can also prevent the dust from entering the lifting cylinder 41 in the opposite direction.

[0058] Each sealing ring 40 is threaded with a first screw 45. The first screw 45 is arranged vertically, and its upper end extends above the top plate 11. A transmission gear 46 is fixedly installed on the upper end of the first screw 45. When the transmission gear 46 rotates, it can drive the first screw 45 to rotate, thereby driving the sealing ring 40 to rise and fall.

[0059] like Figure 5 As shown, in each dust removal unit, each row of filter bags 33 is provided with a set of drive structures. The drive structure includes a mounting base 50 installed on the top plate 11. A drive rod 51 is rotatably mounted on the mounting base 50. The axis of the drive rod 51 extends in the left and right direction. A first motor 52 is installed at one end of the drive rod 51 to drive its rotation. Multiple drive wheels 53 are installed at intervals in the left and right direction on the drive rod 51. The multiple drive wheels 53 are respectively arranged in a one-to-one correspondence with the transmission gears 46 in each row, and the drive wheels 53 are meshed with the corresponding transmission gears 46. Thus, when the first motor 52 drives the drive rod 51 to rotate, the drive rod 51 drives all the drive wheels 53 to rotate, the drive wheels 53 drive the transmission gears 46 to rotate, and then drive the first screw 45 to rotate, thereby driving the sealing ring 40 to rise and fall.

[0060] Each dust removal unit is equipped with a base plate 60, which is horizontally arranged. The base plate 60 has through-holes at positions corresponding to the filter bags 33 in the dust removal unit, ensuring that the filter bags 33 can pass through the base plate 60. A telescopic cylinder 63 is installed on the base plate 60 at each position corresponding to the through-hole. The telescopic cylinder 63 is fitted over the filter bags 33, with its lower end fixedly connected to the base plate 60 and its upper end fixedly connected to the lower surface of the top plate 11.

[0061] In this embodiment, the telescopic cylinder 63 is a corrugated rubber tube, which ensures that the telescopic cylinder 63 can adapt to the lifting and lowering process of the base plate 60. It is particularly noteworthy that the outer surface of the sealing ring 40 is in close contact with the inner wall of the telescopic cylinder 63.

[0062] A vertically arranged second screw 61 is rotatably mounted on the top plate 11. The second screw 61 passes through the bottom plate 60 and is threadedly connected to the bottom plate 60. The lower end of the second screw 61 is rotatably engaged with the bottom wall of the filter chamber 14. A second motor 62, connected to the second screw 61, is also fixedly mounted on the upper surface of the top plate 11. The second motor 62 can drive the second screw 61 to rotate, thereby driving the bottom plate 60 to rise and fall. When the bottom plate 60 descends to the bottom, it abuts against the bottom wall of the filter chamber 14. At this time, all the telescopic cylinders 63 are extended, and the telescopic cylinders 63 wrap the filter bag 33 inside. When the bottom plate 60 rises to the top, all the telescopic cylinders 63 retract and fold, exposing the filter bag 33 to the outside, ensuring the normal operation of the filter bag 33.

[0063] When it is necessary to clean the dust adhering to the outside of the filter bag 33, firstly, the second motor 62 drives the second screw 61 to rotate, thereby driving the base plate 60 to rise and fall. The base plate 60 descends to the bottom and abuts against the bottom wall of the filter chamber 14. At this time, all the telescopic cylinders 63 are extended and wrap the filter bag 33 inside. Then, compressed air is sprayed at high speed into the filter bag 33 through the nozzles on the blow pipe 23. Initially, the lifting cylinder 41 is located on the outside of the filter bag 33 and near the top. Therefore, the airflow inside the lifting cylinder 41 will carry the dust on the outside of the filter bag 33 out through the air blowing hole 42. The dust in the part of the filter bag 33 below the lifting cylinder 41 will still fall normally and finally fall into the collection chamber 18 below.

[0064] Meanwhile, the first motor 52 drives the drive rod 51 to rotate, the drive rod 51 drives all the drive wheels 53 to rotate, the drive wheels 53 drive the transmission gear 46 to rotate, which in turn drives the first screw 45 to rotate, causing the sealing ring 40 to begin to descend. As the sealing ring 40 descends, the outer side of the sealing ring 40 remains in close contact with the inner wall of the telescopic cylinder 63, and the inner side of the sealing ring 40 presses the bag body 35 of the filter bag 33 tightly against the support frame 32. Therefore, a relatively sealed annular cavity is formed above the sealing ring 40. That is, the inner wall of the telescopic cylinder 63, the outer wall of the bag body 35, the upper surface of the sealing ring 40, and the lower surface of the top plate 11 form an annular cavity. When compressed air enters the filter bag 33 and moves downward, the compressed air... The compressed air causes radial deformation of the filter bag 33, shaking off the dust adhering to its outer surface. Therefore, some of the compressed air passes through the filter bag 33 and enters the annular cavity. Since the annular cavity is relatively sealed, the potential energy of the compressed air is not excessively consumed, thus retaining most of its potential energy and allowing it to continue moving downwards. As the sealing ring 40 and the lifting cylinder 41 move downwards, the volume of the annular cavity continuously increases. This reduces the energy loss of the compressed air during the journey above the sealing ring 40, effectively increasing the power of the compressed air to reach the lifting cylinder 41 until the lifting cylinder 41 reaches the bottom of the filter bag 33. This improves the cleaning effect of the compressed air on the bottom part of the filter bag 33. In other words, without the annular cavity, the compressed air would be completely released after passing through the filter bag 33, resulting in excessive energy consumption and reduced cleaning effect when it reaches the bottom of the filter bag 33.

[0065] Furthermore, the presence of the telescopic cylinder 63 prevents dust removed from filter bags 33 from flying onto other filter bags 33, thus avoiding cross-contamination and improving the dust cleaning effect of filter bags 33. At the same time, the six dust collection units can also perform independent dust cleaning operations without interfering with each other.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dust collector for an electric steel furnace, comprising: The dust collector housing has a top plate inside, and multiple dust collection units are provided on the top plate. Each dust collection unit includes a bearing ring provided on the multiple top plates. Multiple support frames are provided circumferentially on the bearing rings. Filter bags are sleeved on the outside of the support frames. The dust collector housing is characterized by also having a cleaning module inside. The cleaning module includes multiple sealing rings respectively fitted on the outside of the filter bags. The sealing rings are coaxial with the bearing rings and can slide along their axial direction. A lifting cylinder is coaxially located below the sealing rings. Multiple downward-sloping air blowing holes are opened on the outer wall of the lifting cylinder. Multiple blowpipes are set above the top plate. Each blowpipe has multiple nozzles corresponding to a filter bag. Multiple base plates corresponding to dust collection units are installed inside the dust collector shell. The base plates can slide up and down. Multiple telescopic cylinders are set on the base plates respectively fitted on the outside of the filter bags. One end of the telescopic cylinder is connected to the top plate and the other end is connected to the base plate. The outer side of the sealing ring abuts against the inner wall of the telescopic cylinder. The inner side of the sealing ring presses the filter bag tightly against the support frame.

2. The dust collector for an electric steel furnace according to claim 1, characterized in that, Each sealing ring is threaded with a first screw. The first screw is arranged vertically and its upper end rotates on the top plate. A transmission gear is fixedly installed on the upper end of the first screw. Multiple drive structures that drive the transmission gear to rotate are also installed above the top plate.

3. A dust collector for an electric steel furnace according to claim 2, characterized in that, The drive structure includes a mounting base mounted on the top plate, a drive rod rotatably mounted on the mounting base, and multiple drive wheels spaced apart along the length of the drive rod, with each drive wheel meshing with a corresponding transmission gear.

4. A dust collector for an electric steel furnace according to claim 1, characterized in that, Each base plate is threaded with a vertically arranged second screw, the upper end of which is rotatably engaged with the top plate. A second motor connected to the second screw is installed on the top plate.

5. A dust collector for an electric steel furnace according to claim 1, characterized in that, The telescopic cylinder is a corrugated pipe made of rubber.

6. A dust collector for an electric steel furnace according to claim 1, characterized in that, The outer side of each air inlet is provided with an upper cover and a lower cover. The upper cover is located above the lower cover, and the upper cover and the lower cover are arranged at an angle. Along the axis away from the lifting cylinder, the upper cover gradually tilts downward and the lower cover gradually tilts upward, and the length of the upper cover is greater than the length of the lower cover.

7. A dust collector for an iron and steel electric furnace according to any one of claims 1-6, characterized in that, The sealing ring is made of rubber.

8. A dust collector for an electric steel furnace according to claim 7, characterized in that, A partition plate is installed in the chamber below the top plate, which divides the chamber below into a filter chamber and a clean air passage. The dust collector shell is provided with an air inlet pipe that communicates with the filter chamber, and the dust collector shell is also provided with an exhaust pipe that communicates with the clean air passage. Ventilation holes are opened on the top plate at positions corresponding to the clean air passage.

9. A dust collector for an electric steel furnace according to claim 8, characterized in that, A control cylinder is installed on the outer shell of the dust collector. The extension and retraction part of the control cylinder is equipped with a sealing plate, which corresponds to the vent hole and is used to control the opening and closing of the vent hole.

10. A dust collector for an electric steel furnace according to claim 9, characterized in that, The bottom of the filter chamber is provided with multiple conical collection chambers, and the top of the collection chambers is connected to the filter chamber.

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