Dust remover of steel electric furnace

Abstract

The invention relates to the technical field of dust removers, and particularly discloses a dust remover of a steel electric furnace, which comprises a dust remover shell, a top plate is arranged in the dust remover shell, a plurality of dust removal units are arranged on the top plate, each dust removal unit comprises a bearing ring arranged on the plurality of top plates, a plurality of supporting frameworks are arranged on the bearing ring in the circumferential direction, and the outer sides of the supporting frameworks are sleeved with filter bags; a cleaning module is also arranged in the dust remover shell; the cleaning module comprises a plurality of sealing rings which are respectively sleeved on the outer sides of the filter bags, the sealing rings are coaxial with the bearing ring and can slide along the axial direction of the bearing ring, and a lifting cylinder is coaxially arranged below the sealing rings. The device has the beneficial effects that when compressed air reaches the position of the lifting cylinder, the energy of the compressed air is effectively improved, and the power enhancement effect is achieved until the lifting cylinder smoothly reaches the bottommost position of the filter bag, so that the cleaning effect of the compressed air on the part, close to the bottom, of the filter bag is remarkably improved, and the cleaning effect is greatly improved. And the cleaning effect of the filter bag in the area is more thorough and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of dust collectors, and in particular to a dust collector for a steel electric furnace. Background Art

[0002] A bag filter generally consists of a bag chamber, a cleaning mechanism, and an ash hopper. It features high dust removal efficiency, a wide range of air volume handling, a simple structure, easy maintenance, and a lower cost than an electrostatic precipitator. It can operate at temperatures exceeding 200°C and is insensitive to dust characteristics, unaffected by dust and electrical resistance. Bag filters are available in cylindrical or flat shapes. They utilize porous bag-shaped filter elements (cloth bags) to capture dust from dust-laden gases. When the dust layer on the bag surface reaches a certain thickness, the bag must be cleaned to ensure continued air permeability. Bag filters are primarily used for flue gas removal from industrial furnaces and kilns; filtering and purifying dust-laden air in work areas and exhaust from silos in pneumatic conveying systems; and separating dust products or clean gas from gas and solid two-phase flows. They are suitable for capturing fine, dry, non-fibrous dust. When the dust-laden gas enters the bag dust collector, the large particles and high specific gravity dust settle down due to gravity and fall into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is retained, and the gas is purified.

[0003] The Chinese patent with the authorization announcement number CN118217732B discloses a bag pulse dust collector, which belongs to the technical field of industrial dust removal equipment. It includes an external frame, an air intake frame, and an air outlet frame. It also includes: a mobile platform, which is slidably arranged on one side of the air intake frame, and a plurality of mounting slots are provided on the mobile platform; a filter assembly, which includes a plurality of filter units, and the filter units are detachably arranged in corresponding mounting slots; a lifting assembly, which is arranged on one side of the air outlet frame, and the lifting assembly includes a pick-up rack, which is arranged relative to the filter units, and a lifter is provided on one side of the pick-up rack. The pick-up rack is driven by the lifter to bring the filter units out of the mounting slots. The patent adopts a multi-level split structure design, which can automatically extract the internal structure, reducing the difficulty of internal inspection and maintenance of the bag pulse dust collector. In addition, when the internal bag is replaced, the backflush pipe and frame can be automatically extracted, thereby improving the efficiency of bag replacement.

[0004] During the pulse jet cleaning process, 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 decays during the longitudinal propagation along the filter bag. This energy attenuation effect causes the cleaning effect to show a significant longitudinal gradient difference: the bag opening area close to the nozzle directly bears the initial impact energy and can effectively peel off the high-resistance dust layer; while the bag bottom area far away from the nozzle is often difficult to completely remove deeply embedded fine dust particles because the shock wave energy decays below the critical threshold, eventually forming a bottom weak area of ​​cleaning efficiency, resulting in incomplete cleaning at the bottom of the filter bag. Summary of the Invention

[0005] The present invention provides a dust collector for an electric steel furnace, aiming to solve the problem in related technologies that after the shock wave is injected from the top opening of the filter bag, its energy gradually decays during the longitudinal propagation along the filter bag. This energy decay effect causes the cleaning effect to present a significant longitudinal gradient difference: the bag opening area close to the blowing port directly bears the initial impact energy and can effectively peel off the high-resistance dust layer; while the bag bottom area far from the blowing port is often difficult to completely remove deeply embedded fine dust particles because the shock wave energy decays below a critical threshold, and ultimately forms a bottom weak area of ​​cleaning efficiency, thereby leading to the technical problem of incomplete cleaning at the bottom of the filter bag.

[0006] The dust collector of the present invention comprises: a dust collector shell, a top plate is provided in the dust collector shell, and a plurality of dust collection units are provided on the top plate, each dust collection unit comprises a carrying ring arranged on the plurality of top plates, a plurality of supporting frames are provided circumferentially on the carrying ring, and a filter bag is sleeved on the outer side of the supporting frames, and a cleaning module is further provided in the dust collector shell; the cleaning module comprises a plurality of sealing rings respectively sleeved on the outer sides of the filter bags, the sealing rings are coaxial with the carrying rings and can slide along their axial directions, a lifting cylinder is coaxially provided below the sealing rings, a plurality of downwardly inclined blowing holes are opened on the outer side wall of the lifting cylinder, a plurality of blowing pipes are provided above the top plate, and a plurality of nozzles are provided on the blowing pipes, respectively corresponding to the filter bags, a plurality of bottom plates respectively corresponding to the dust collection units are installed in the dust collector shell, the bottom plates can slide up and down, and a plurality of telescopic cylinders are provided on the bottom plates, respectively sleeved on the outer sides of the filter bags, one end of the telescopic cylinders is connected to the top plate, and the other end is connected to the bottom plate, the outer side of the sealing ring abuts against the inner wall of the telescopic cylinder, and the inner side surface of the sealing ring presses the filter bag tightly against the supporting frame.

[0007] Beneficial Effects: The first motor drives the drive rod to rotate, which in turn drives all the drive wheels to rotate, which in turn drives the transmission gear to rotate, which in turn drives the first screw to rotate, driving the sealing ring to begin to descend. As the sealing ring descends, the outer side of the sealing ring remains in close contact with the inner wall of the telescopic cylinder, and the inner side of the sealing ring tightly presses the bag body of the filter bag against the support frame, so that a relatively sealed annular cavity is formed above the sealing ring. When compressed air enters the filter bag and moves downward, the compressed air causes the filter bag to deform radially, shaking off dust attached to the outer side of the filter bag. A portion of the compressed air will pass through the filter bag and enter the annular cavity. Since the annular cavity is in a relatively sealed state, the potential energy of the compressed air is not excessively consumed, so that most of the potential energy is retained, allowing it to continue to move downward. As the sealing ring and the lifting cylinder continue to move downward, the volume of the annular cavity gradually increases. In this process, since the energy loss of the compressed air is significantly reduced during the downward movement of the sealing ring, the energy of the compressed air is effectively increased when the compressed air reaches the position of the lifting cylinder. This increased power continues until the lifting cylinder reaches the bottom of the filter bag. In this way, the cleaning effect of the compressed air on the bottom of the filter bag is significantly improved, ensuring that the filter bag is cleaned more thoroughly and efficiently in this area.

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

[0009] The effect is that the driving structure drives the transmission gear to rotate, which causes the first screw to rotate, and finally causes the sealing ring to move up and down.

[0010] Preferably, the driving structure includes a mounting seat mounted on the top plate, a driving rod is rotatably mounted on the mounting seat, a plurality of driving wheels are installed on the driving rod at intervals along its length direction, and the plurality of driving wheels are respectively engaged with corresponding transmission gears.

[0011] Preferably, the bottom plate is threadedly fitted with a vertically arranged second screw rod, the upper end of the second screw rod is rotatably fitted with the top plate, and a second motor connected to the second screw rod is mounted on the top plate.

[0012] The effect is that the second motor drives the second screw to rotate, so that the second screw can drive the bottom plate to move up and down, and finally control the expansion and contraction of the telescopic cylinder.

[0013] Preferably, the telescopic cylinder is a bellows made of rubber material.

[0014] Preferably, an upper shield plate and a lower shield plate are provided on the outer side of the blowing hole, the upper shield plate is located above the lower shield plate, and the upper shield plate and the lower shield plate are cross-tilted and arranged in a direction away from the axis of the lifting cylinder. The upper shield plate gradually tilts downward and the lower shield plate gradually tilts upward, and the length of the upper shield plate is greater than the length of the lower shield plate.

[0015] The effect is: the purpose is to allow the pulse gas that reaches the lifting cylinder to be blown out from the blowing hole, and then be guided by the upper baffle and the lower baffle so that the pulse gas can be sprayed obliquely downward, thereby blowing the dust that falls off the filter bag to the bottom, 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 reverse.

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

[0017] The effect is to ensure that the outer side of the sealing ring is in close contact with the telescopic cylinder and the inner side of the sealing ring is in close contact with the filter bag.

[0018] Preferably, a partition plate is provided in the chamber below the top plate, which divides the chamber below into a filter chamber and a clean air channel. An air inlet pipe connected to the filter chamber is provided on the dust collector shell, and an exhaust pipe connected to the clean air channel is also provided on the dust collector shell. Vent holes are opened on the top plate at positions corresponding to the clean air channels.

[0019] Preferably, a control cylinder is installed on the dust collector housing, and a sealing plate is provided on the telescopic portion of the control cylinder. The sealing plate corresponds to the vent hole and is used to control the opening and closing of the vent hole.

[0020] Preferably, a plurality of conical collecting bins are provided at the bottom of the filter chamber, and the tops of the collecting bins are communicated with the filter chamber.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are: The first motor rotates the drive rod, which in turn drives all the drive wheels, which in turn drive the transmission gears, which in turn drive the first screw, causing the sealing ring to begin to descend. As the sealing ring descends, the outer side of the sealing ring maintains close contact with the inner wall of the telescopic cylinder, and the inner side of the sealing ring presses the filter bag tightly against the support frame. This creates a relatively sealed annular cavity above the sealing ring. As compressed air enters the filter bag and moves downward, it deforms the filter bag radially, shaking off dust adhering to the outside of the 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 dissipated, allowing it to retain most of its potential energy and continue to move downward. As the sealing ring and the lifting cylinder continue to move downward, the volume of the annular cavity gradually increases. During this process, the compressed air energy loss is significantly reduced during the downward movement of the sealing ring. Therefore, the compressed air has a significantly increased energy when it reaches the lifting cylinder. This increased 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.

[0022] The presence of the telescopic cylinder can effectively control the dust removed from the filter bag and prevent it from flying around and attaching to other filter bags. This not only avoids cross contamination of dust between different filter bags, but also greatly improves the dust removal efficiency of the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a left view of the present invention.

[0025] Figure 3 For the present invention Figure 2 Cross-sectional view of AA in the figure.

[0026] Figure 4 For the present invention Figure 2 Cross-sectional view of the BB.

[0027] Figure 5 Schematic diagram of the interior of the clean air chamber of the present invention from a top view.

[0028] Figure 6 It is an exploded schematic diagram of the telescopic cylinder and the filter bag of the present invention.

[0029] Figure 7 It is a cross-sectional view of the sealing ring of the present invention.

[0030] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0031] Figure 9 It is an exploded schematic diagram of the support frame, filter bag and sealing ring of the present invention.

[0032] Reference numerals: 10. Dust collector housing; 11. Top plate; 12. Clean air chamber; 13. Partition plate; 14. Filter chamber; 15. Clean air channel; 16. Inlet pipe; 17. Exhaust pipe; 18. Collection bin; 19. Inspection cover; 20. Vent hole; 21. Control cylinder; 22. Sealing plate; 23. Blowing pipe; 30. Mounting hole; 31. Loading ring; 32. Support frame; 33. Filter bag; 34. Mounting ring; 35. Bag body; 40. Sealing ring; 41. Lifting cylinder; 42. Blowing hole; 43. Upper shield plate; 44. Lower shield plate; 45. First screw; 46. Transmission gear; 50. Mounting seat; 51. Drive rod; 52. First motor; 53. Drive wheel; 60. Bottom plate; 61. Second screw; 62. Second motor; 63. Telescopic cylinder. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figures 1 to 9 As shown, a specific embodiment of a dust collector for a steel electric furnace of the present invention includes a carrying module, a dust removal module and a cleaning module.

[0035] like Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown, the carrying 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 channel 15 , an air inlet pipe 16 , an exhaust pipe 17 , a collection bin 18 and an inspection cover 19 .

[0036] The dust collector housing 10 is a square box structure. A top plate 11 is provided in the chamber inside the dust collector housing 10. The top plate 11 is arranged horizontally. The top plate 11 divides the chamber inside the dust collector housing 10 into two upper and lower chambers. The upper chamber is a clean air chamber 12. A partition plate 13 is provided in the lower chamber. The partition plate 13 is arranged vertically. The upper end of the partition plate 13 abuts against the bottom of the top plate 11, and the lower end of the partition plate 13 is connected to the bottom wall of the chamber inside the dust collector housing 10, so that 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.

[0037] An air inlet pipe 16 is provided 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. Dust-laden gas can enter the filter chamber 14 through the air inlet pipe 16, and then after being filtered by the dust removal module, the filtered gas enters the clean air chamber 12. The clean air chamber 12 is connected to the clean air channel 15, and the filtered gas will enter the clean air channel 15. An exhaust pipe 17 is provided on the right side of the dust collector housing 10. The exhaust pipe 17 is connected to the clean air channel 15. The filtered gas is finally discharged from the exhaust pipe 17 and finally discharged into the atmosphere.

[0038] like Figure 4 and Figure 5 As shown, multiple ventilation holes 20 are provided at corresponding positions on the top plate 11 and the clean air passage 15, spaced apart along the left-right direction. These ventilation holes 20 extend vertically through the top plate 11, effectively connecting the clean air passage 15 with the clean air chamber 12. In this embodiment, the ventilation holes 20 are designed as a circular structure. However, in other embodiments, the shape of the ventilation holes 20 is not limited to a circular shape and can be variously designed according to specific needs.

[0039] A plurality of control cylinders 21 are fixedly mounted above the dust collector housing 10. These control cylinders 21 are arranged in a one-to-one correspondence with the vents 20 to ensure that each vent 20 can be controlled. The telescopic portion of the control cylinder 21 extends downward into the interior of the clean air chamber 12, and the axis of the telescopic portion of the control cylinder 21 extends in the vertical direction. A sealing plate 22 is fixedly mounted on the telescopic portion of the control cylinder 21. The diameter of the sealing plate 22 is larger than the diameter of the vent 20. This design is to ensure a good sealing effect. In addition, a rubber pad is specially provided at the bottom of the sealing plate 22, which further enhances the sealing effect.

[0040] When the control cylinder 21 drives the sealing plate 22 downward, the vent 20 is completely closed, and the filtered gas in the clean air chamber 12 cannot enter the clean air channel 15. On the contrary, when the sealing plate 22 is raised under the action of the control cylinder 21, the vent 20 is opened, and the filtered gas in the clean air chamber 12 can smoothly enter the clean air channel 15 and finally be discharged through the exhaust pipe 17, completing the entire gas purification and discharge process.

[0041] The bottom of the filter chamber 14 is equipped with multiple collection bins 18. These bins 18 all feature a conical design to ensure efficient collection and storage of settled dust. Notably, the tops of these conical collection bins 18 maintain good connectivity with the filter chamber 14, ensuring smooth entry of dust into the collection bins 18. Specifically, in this embodiment, the collection bins 18 are arranged in two rows, front and back, with three collection bins 18 evenly spaced along the left and right sides of each row. The arrangement of the collection bins 18 is compatible with the dust removal module, as will be described in detail later.

[0042] Multiple access covers 19 are installed on the upper surface of the dust collector housing 10. These covers 19 facilitate routine inspection, repair, and maintenance of the various components within the clean air chamber 12 by technicians. Specifically, the presence of these covers greatly simplifies the maintenance process, allowing maintenance personnel to easily open the covers and directly access the components within the clean air chamber 12, effectively performing necessary maintenance operations and ensuring the proper operation and service life of the equipment.

[0043] 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 dust removal module includes a total of 6 high-efficiency dust removal units. The 6 dust removal units are distributed in two rows in the front and back. Specifically, each row is provided with 3 dust removal units evenly spaced along the left and right directions. More importantly, each dust removal unit forms a one-to-one correspondence with the collection bin 18, ensuring that the collection bin 18 can collect the dust generated by the dust removal unit separately. In addition, each dust removal unit works independently during operation and does not interfere or affect each other. This design greatly facilitates the cleaning of each dust removal unit during operation, which not only improves the cleaning efficiency, but also ensures the stable operation and reliability of the entire dust removal system.

[0044] Each dust removal unit includes a carrier ring 31, a support frame 32, a filter bag 33, a mounting ring 34, and a bag body 35. Multiple mounting holes 30 extending vertically through the top plate 11 are provided at positions corresponding to each dust removal unit. In this embodiment, the mounting holes 30 are circular and arranged in three rows, with four holes spaced apart in each row.

[0045] A load-bearing ring 31 is provided above each mounting hole 30 . The load-bearing ring 31 is an annular structure and is coaxially arranged with the mounting hole 30 . In this embodiment, the inner diameter of the load-bearing ring 31 is smaller than the diameter of the mounting hole 30 , and the outer diameter of the load-bearing ring 31 is larger than the diameter of the mounting hole 30 .

[0046] Multiple support frames 32 are fixedly mounted on the lower surface of the support ring 31 and are evenly distributed along the circumference of the support ring 31. The support frames 32 are cylindrical rod-like structures, and their axes extend vertically. In other words, the support frames 32 extend downward through the mounting holes 30 into the interior of the filter chamber 14. The support frames 32 along the circumference abut against the inner wall of the mounting holes 30, thereby ensuring the stability of the support frames 32 and preventing them from shaking.

[0047] A filter bag 33 is sleeved onto the outer side of the support frame 32. The support frame 32 firmly supports the filter bag 33, effectively maintaining its proper shape and structure. This ensures that the filter bag 33 achieves the desired filtering effect during filtration, ensuring a smooth filtration process. Specifically, the filter bag 33 consists of two main components: a mounting ring 34 and a bag body 35. The mounting ring 34 and bag body 35 are tightly connected to form a single, integrated structure. The bag body 35 is cylindrical with an open end, facilitating smooth entry and exit of gas. The mounting ring 34 is mounted at the upper opening 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 mounted to the lower surface of the support ring 31 but also coaxially arranged with the support ring 31. This coaxial arrangement further enhances the coordination and fit between the filter bag 33 and the support ring 31.

[0048] The dust-laden gas can enter the filter chamber 14 through the air inlet pipe 16, and then after being filtered by the bag body 35, the filtered gas enters the clean air chamber 12 from the opening above 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 from 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 bin 18 below.

[0049] After prolonged, continuous operation, the sides of the bag 35 will inevitably accumulate a relatively thick layer of dust. Once this thick layer forms, it will significantly negatively impact the bag 35's intended filtering performance, significantly reducing its efficiency or even completely rendering it ineffective. The cleaning module's primary function is to effectively clean this dust adhering to the outer surfaces of the bag 35. The cleaning module promptly removes dust from the bag 35's exterior, restoring its normal filtering function and ensuring the system's normal operation and filtering effectiveness.

[0050] like Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 as well as Figure 9 As shown, the cleaning module includes a blowing tube 23, a sealing ring 40, a lifting cylinder 41, an upper shield plate 43, a lower shield plate 44, a first screw 45, a transmission gear 46, a mounting seat 50, a driving rod 51, a first motor 52, a driving wheel 53, a base plate 60, a second screw 61, a second motor 62 and a telescopic cylinder 63.

[0051] A plurality of blowing pipes 23 are arranged at intervals along the front-to-back direction in the clean air chamber 12. The blowing pipes 23 are arranged horizontally, and the axis of the blowing pipes 23 extends along the left-to-right direction. A plurality of nozzles are arranged at intervals along the length direction at the bottom of the blowing pipes 23. The plurality of blowing pipes 23 in the front-to-back direction correspond one-to-one to the plurality of rows of filter bags 33 in the front-to-back direction, and the plurality of nozzles at the bottom of the blowing pipes 23 correspond one-to-one to the plurality of filter bags 33 in each row.

[0052] A pulse valve is also connected to the blowpipe 23. Its primary function is to control and regulate the flow and pressure of compressed air. When the system initiates the dust cleaning process, compressed air is injected into the filter bag 33 at high speed through the nozzle on the blowpipe 23. The airflow vibration and reverse airflow remove dust from the filter bag 33, completing the dust cleaning process.

[0053] Each filter bag 33 is sheathed with a sealing ring 40 on the outside. The sealing ring 40 is annular in structure and made of flexible rubber. The sealing ring 40 can slide along the length of the filter bag 33. It is particularly noted that the inner side of the sealing ring 40 abuts against the multiple support frames 32 in the circumferential direction. That is, the inner side of the sealing ring 40 presses the bag body 35 of the filter bag 33 tightly against the support frame 32 (e.g., Figure 8 shown).

[0054] A lifting cylinder 41 is coaxially fixedly mounted on the bottom of the sealing ring 40 . A plurality of blowing holes 42 are provided on the lifting cylinder 41 along its circumference, and the blowing holes 42 are arranged in a multi-layer array along the axial direction of the lifting cylinder 41 .

[0055] An upper shield plate 43 and a lower shield plate 44 are provided on the outside of the air blowing hole 42. The upper shield plate 43 is located above the lower shield plate 44, and the upper shield plate 43 and the lower shield plate 44 are cross-angled and arranged. Along the direction away from the axis of the lifting cylinder 41, the upper shield plate 43 gradually tilts downward, and the lower shield plate 44 gradually tilts upward, and the length of the upper shield plate 43 is greater than the length of the lower shield plate 44, that is, the upper shield plate 43 covers the upper part of the lower shield plate 44. The purpose of such arrangement is to allow the pulsed gas reaching the lifting cylinder 41 to be blown out from the air blowing hole 42, and to be guided by the upper shield plate 43 and the lower shield plate 44 so that the pulsed gas can be ejected obliquely downward, thereby blowing the dust peeled off from the filter bag 33 to the bottom, preventing the dust from floating upward. At the same time, the arrangement of the lower shield plate 44 can also prevent the dust from entering the lifting cylinder 41 in the opposite direction.

[0056] Each sealing ring 40 is threadedly connected to a first screw 45, which is arranged vertically and the upper end of the first screw 45 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.

[0057] like Figure 5 As shown, in each dust removal unit, each row of filter bags 33 is correspondingly provided with a group of driving structures, and the driving structure includes a mounting base 50 mounted on the top plate 11, and a driving rod 51 is rotatably mounted on the mounting base 50, and the axis of the driving rod 51 extends in the left-right direction. One end of the driving rod 51 is installed with a first motor 52 that drives it to rotate, and a plurality of driving wheels 53 are installed on the driving rod 51 at intervals along the left-right direction. The plurality of driving wheels 53 are respectively arranged in a one-to-one correspondence with the transmission gear 46 of each row, and the driving wheels 53 are meshed with the corresponding transmission gears 46, so that when the first motor 52 drives the driving rod 51 to rotate, the driving rod 51 drives all the driving wheels 53 to rotate, and the driving wheels 53 drive the transmission gear 46 to rotate, thereby driving the first screw 45 to rotate, and driving the sealing ring 40 to rise and fall.

[0058] Each dust removal unit is provided with a horizontally arranged bottom plate 60. Vertically extending through-holes are provided on the bottom plate 60 at positions corresponding to the filter bags 33 in the dust removal unit, thereby ensuring that the filter bags 33 pass through the bottom plate 60. A telescopic cylinder 63 is mounted on the bottom plate 60 at a position corresponding to each of the holes. The telescopic cylinder 63 is sleeved around the outside of the filter bags 33, with the lower end of the telescopic cylinder 63 fixedly connected to the bottom plate 60 and the upper end of the telescopic cylinder 63 fixedly connected to the lower surface of the top plate 11.

[0059] In this embodiment, the telescopic tube 63 is a rubber bellows, so as to ensure that the telescopic tube 63 can be adaptively extended and retracted during the raising and lowering of the base plate 60. In particular, the outer side of the sealing ring 40 is in close contact with the inner wall of the telescopic tube 63.

[0060] A second, vertically arranged screw rod 61 is also rotatably mounted on the top plate 11. The second screw rod 61 extends through the bottom plate 60 and is threadedly connected thereto. The lower end of the second screw rod 61 rotatably engages the bottom wall of the filter chamber 14. A second motor 62, connected to the second screw rod 61, is also fixedly mounted on the top surface of the top plate 11. The second motor 62 drives the second screw rod 61 to rotate, thereby raising and lowering the bottom plate 60. When the bottom plate 60 descends to the bottom, it abuts the bottom wall of the filter chamber 14. At this point, all the telescopic cylinders 63 extend and enclose the filter bag 33. When the bottom plate 60 ascends, the telescopic cylinders 63 retract and fold, extruding the filter bag 33 and ensuring its proper operation.

[0061] When it is necessary to clean the dust attached to the outside of the filter bag 33, first, the second motor 62 drives the second screw 61 to rotate, thereby driving the bottom plate 60 to rise and fall. The bottom plate 60 drops 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 the telescopic cylinders 63 wrap the filter bag 33 inside. Then, compressed air is sprayed into the filter bag 33 at high speed through the nozzle on the blowing pipe 23. At the beginning, the lifting cylinder 41 is located outside the filter bag 33 and close to the top position. Therefore, the airflow inside the lifting cylinder 41 will drive the dust outside the filter bag 33 to be blown out from the blowing hole 42. The dust in the filter bag 33 below the lifting cylinder 41 will continue to scatter normally and finally fall into the collection bin 18 below. At the same time, the first motor 52 drives the driving rod 51 to rotate, and the driving rod 51 drives all the driving wheels 53 to rotate, and the driving wheels 53 drive the transmission gear 46 to rotate, and then drive the first screw 45 to rotate, driving the sealing ring 40 to start descending. As the sealing ring 40 descends, the outer side of the sealing ring 40 keeps in close contact with the inner wall of the telescopic cylinder 63, and the inner side surface of the sealing ring 40 presses the bag body 35 of the filter bag 33 tightly against the support frame 32, so a relatively sealed annular cavity is formed above the sealing ring 40, that is, the inner wall of the telescopic cylinder 63, the outer side 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 the compressed air enters the filter bag 33 and moves downward, the compressed air The compressed air will cause the filter bag 33 to deform radially, shaking off dust adhering to the outside of the filter bag 33. Therefore, a portion of the compressed air will pass through the filter bag 33 and into the annular cavity. Because the annular cavity is relatively sealed, the potential energy of the compressed air is not excessively consumed, allowing it to retain most of its potential energy and continue to move downward. As the sealing ring 40 and the lifting cylinder 41 continue to move downward, the volume of the annular cavity will continue to expand. Since the compressed air energy loss in the section above the sealing ring 40 is reduced, the power of the compressed air reaching the lifting cylinder 41 is effectively increased, until the lifting cylinder 41 reaches the bottom of the filter bag 33, thereby improving the cleaning effect of the compressed air on the portion near the bottom of the filter bag 33. In other words, if there is no annular cavity, the compressed air will 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.

[0062] In addition, the presence of the telescopic cylinder 63 prevents dust removed from the filter bag 33 from flying onto other filter bags 33, thereby avoiding cross contamination of dust and improving the dust cleaning effect of the filter bag 33. At the same time, the six dust removal units can also perform dust cleaning operations independently without interfering with each other.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A dust collector for a steel electric furnace, comprising: A dust collector housing is provided with a top plate inside the dust collector housing, and a plurality of dust removal units are provided on the top plate. The dust removal units each include a carrying ring provided on the plurality of top plates, a plurality of supporting frames are provided circumferentially on the carrying ring, and a filter bag is provided on the outer side of the supporting frame. The dust collector housing is characterized in that a cleaning module is also provided; The cleaning module includes multiple sealing rings which are respectively mounted on the outside of the filter bags. The sealing rings are coaxial with the carrying rings and can slide along their axial directions. A lifting cylinder is coaxially provided below the sealing ring. The outer wall of the lifting cylinder is provided with multiple downward-inclined blowing holes. Multiple blowing pipes are provided above the top plate. The blowing pipes are provided with multiple nozzles which correspond one-to-one to the filter bags. Multiple bottom plates which correspond one-to-one to the dust removal units are installed in the dust collector shell. The bottom plates can slide up and down. Multiple telescopic cylinders which are respectively mounted on the outside of the filter bags are provided on the bottom plates. One end of the telescopic cylinder is connected to the top plate, and the other end is connected to the bottom plate. The outer side of the sealing ring abuts against the inner wall of the telescopic cylinder, and the inner side of the sealing ring presses the filter bag tightly against the supporting frame.

2. The dust collector for a steel electric furnace according to claim 1, characterized in that: The sealing rings are all threaded with a first screw, which is arranged vertically and has its upper end rotated on the top plate. A transmission gear is fixedly installed on the upper end of the first screw, and multiple groups of drive structures that drive the transmission gear to rotate are also installed above the top plate.

3. The dust collector for a steel electric furnace according to claim 2, characterized in that: The driving structure includes a mounting seat mounted on the top plate, a driving rod is rotatably mounted on the mounting seat, and a plurality of driving wheels are installed on the driving rod at intervals along its length direction, and the plurality of driving wheels are respectively engaged with corresponding transmission gears.

4. The dust collector for a steel electric furnace according to claim 1, characterized in that: The bottom plate is threadedly fitted with a vertically arranged second screw rod, the upper end of the second screw rod is rotatably fitted with the top plate, and a second motor connected to the second screw rod is mounted on the top plate.

5. The dust collector for a steel electric furnace according to claim 1, characterized in that: The telescopic cylinder is a bellows made of rubber material.

6. The dust collector for a steel electric furnace according to claim 1, characterized in that: An upper shield plate and a lower shield plate are provided on the outside of the blowing hole. The upper shield plate is located above the lower shield plate, and the upper shield plate and the lower shield plate are cross-tilted. Along the direction away from the axis of the lifting cylinder, the upper shield plate gradually tilts downward, and the lower shield plate gradually tilts upward, and the length of the upper shield plate is greater than the length of the lower shield plate.

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

8. The dust collector for an electric steel furnace according to claim 7, characterized in that: A partition plate is provided in the chamber below the top plate, which divides the chamber below into a filter chamber and a clean air channel. An air inlet pipe connected to the filter chamber is provided on the dust collector shell, and an exhaust pipe connected to the clean air channel is also provided on the dust collector shell. A vent is opened on the top plate at a position corresponding to the clean air channel.

9. The dust collector for an electric steel furnace according to claim 8, characterized in that: A control cylinder is installed on the dust collector housing. The telescopic portion of the control cylinder is provided with a sealing plate. The sealing plate corresponds to the vent hole and is used to control the opening and closing of the vent hole.

10. The dust collector for an electric steel furnace according to claim 9, characterized in that: A plurality of conical collecting bins are provided at the bottom of the filter chamber, and the tops of the collecting bins are communicated with the filter chamber.

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