A dust removal device for electric arc furnace

Abstract

The present invention discloses a dust removal device for an electric arc furnace, comprising a dust removal box and an air inlet pipe, an air outlet pipe and an ash hopper connected to the dust removal box. The air inlet end of the air inlet pipe is connected to an air inlet hood, and the air inlet hood is located directly above the electric arc furnace. Beneficial effect: The dust removal device for an electric arc furnace of the present application rotates around a filter cartridge through multiple nozzles to spray water on the dust layer on the outer circumferential surface of the filter cartridge to wet the dust. The dust layer includes an inner primary layer and an outer outer layer. By controlling the water spraying time, only the outer dust is wetted. This design can make the dust blocks that are agglomerated at the connection between the primary layer and the outer layer and are located in the outer layer absorb moisture and soften. When the scraper is subsequently raised, only the outer dust and the dust blocks located in the outer layer can be scraped off without damaging the primary layer. This effectively avoids the problem of damaging the primary layer when the dust blocks that are partially located in the primary layer and the remaining part located in the outer layer are directly scraped off by the scraper, thereby ensuring that the dust removal efficiency of the dust removal equipment does not decrease after each cleaning operation.

Description

Technical Field

[0001] The invention relates to the field of electric arc furnaces, and in particular to a dust removal device for electric arc furnaces. Background Art

[0002] Electric arc furnace is a common smelting equipment in industrial production, mostly used for smelting ores and metals.

[0003] During the operation of the electric arc furnace, the smelting of ore and metal will produce a large amount of smoke and dust. Therefore, the electric arc furnace usually needs to be equipped with dust removal equipment to purify and filter the dust-containing flue gas before it can be discharged. The dust removal equipment also needs to be cleaned regularly to ensure the dust removal efficiency.

[0004] In order to ensure that the dust removal equipment can maintain high dust removal efficiency for a long time and not cause a decrease in dust removal efficiency due to cleaning operations, the dust removal equipment must not damage the primary layer each time it cleans. However, the pulse dust removal cleaning method commonly used in current common dust removal equipment has the problem of damaging the primary layer. Therefore, the inventor has designed a dust removal equipment with a new cleaning method to solve the above problem. Summary of the invention

[0005] The main purpose of the present invention is to provide a dust removal device for an electric arc furnace, aiming to solve the problem that the existing dust removal device for an electric arc furnace destroys the primary layer each time it cleans the dust, resulting in a decrease in dust removal efficiency.

[0006] In order to solve the above problems, the present invention proposes a dust removal device for an electric arc furnace, comprising a dust removal box and an air inlet pipe, an air outlet pipe and an ash hopper connected to the dust removal box. The air inlet end of the air inlet pipe is connected to an air inlet hood, and the air inlet hood is located directly above the electric arc furnace. The dust removal box is provided with:

[0007] A partition, wherein the partition divides the internal space of the dust removal box into two unconnected parts, chamber one and chamber two, wherein chamber one is connected to an air inlet pipe and an ash hopper, and chamber two is connected to an air outlet pipe;

[0008] A dust filter cartridge is located in chamber one and is fixedly connected to the partition, and the inner space of the dust filter cartridge is connected to chamber two;

[0009] A dust cleaning mechanism is provided below the dust filter cartridge, the dust cleaning mechanism comprising;

[0010] The scraper cylinder is coaxial with the dust filter cylinder;

[0011] The lifting device is fixedly installed in the dust removal box and connected to the scraper, and is used to drive the scraper to rise along the axial direction of the dust filter cylinder to remove the outer layer of dust on the outer circumferential surface of the dust filter cylinder;

[0012] An annular water storage box is fixedly installed on the upper end of the scraper drum and is coaxial with the scraper drum. A rotating ring is coaxially and rotary-sealedly installed on the annular water storage box. A plurality of nozzles are seal-fixedly installed on the rotating ring. The nozzles can spray water onto the dust on the outer circumferential surface of the dust filter cylinder. The nozzles are connected to the interior of the annular water storage box, and the annular water storage box is connected to a water inlet pipe.

[0013] In one embodiment, the dust filter cartridge comprises a frame mesh cartridge and a filter cartridge sleeved on the outer circumferential surface of the frame mesh cartridge, the lower end of the frame mesh cartridge is sealed, and the upper end of the frame mesh cartridge passes through the partition plate and communicates with the second chamber;

[0014] The dust filter cylinder is arranged vertically.

[0015] In one embodiment, there are multiple scraper cylinders, and the multiple scraper cylinders are fixedly connected via a connecting plate. A guide column is vertically slidably installed on the connecting plate, and the guide column is fixedly connected to the dust removal box.

[0016] In one embodiment, a guide cylinder is vertically slidably mounted on the connecting plate, and the guide cylinder is fixedly connected to the dust removal box;

[0017] A fixed pulley is installed at the upper end of the guide cylinder, and a pull rope is wound on the fixed pulley. One end of the pull rope is located outside the guide cylinder and connected to the connecting plate, and the other end of the pull rope is located in the guide cylinder and extends out from the lower end of the guide cylinder. A chassis is sealed and fixedly installed at the lower end of the guide cylinder, and a motor and a rope winding roller transmission-connected to the motor are arranged in the chassis. The pull rope extending from the lower end of the guide cylinder is wound around the rope winding roller.

[0018] In one embodiment, the annular water storage box includes an annular box body and an annular box cover which is detachably and hermetically fixedly connected to the annular box body, the annular box cover is provided with a coaxial annular through hole, a coaxial rotating ring is passed through the annular through hole, and the rotating ring is rotationally sealed and connected to the annular box cover.

[0019] In one embodiment, a mounting ring 1 is coaxially fixedly installed on the inner circumferential surface and the outer circumferential surface of the rotating ring, the mounting ring 1 and the inner side surface of the annular box cover are arranged at intervals, and the inner side surface of the annular box cover and the side surface of the mounting ring 1 facing the annular box cover are both provided with an annular rolling groove 1 coaxial with the mounting ring, and a plurality of balls 1 are rollingly installed in the annular rolling groove 1;

[0020] A mounting ring 2 is coaxially fixedly installed on the inner side surface of the annular box cover. The mounting ring 2 has two strips, which are arranged on both sides of the annular through hole and are spaced apart from the mounting ring 1. A sealing ring 1 is arranged between the mounting ring 1 and the mounting ring 2. The sealing ring 1 is coaxial with the rotating ring. The side of the sealing ring 1 close to the mounting ring 1 is sealed and fixedly connected to the mounting ring 1. The side of the sealing ring 1 close to the mounting ring 2 is tightly and sealedly connected to the mounting ring 2. The sealing ring 1 is squeezed by the mounting ring 2 and bent in the axial direction away from the ball 1.

[0021] In one embodiment, the annular box cover is located at the upper end of the annular box body;

[0022] A plurality of balls 2 are arranged between the mounting ring 1 and the mounting ring 2, a positioning ring 1 is detachably and sealedly fixedly installed on the side of the mounting ring 1 facing away from the ball 1, and a positioning ring 2 is detachably and sealedly fixedly installed on the side of the mounting ring 2 facing the mounting ring 1, the positioning ring 1, the positioning ring 2 and the mounting ring are coaxial, and an annular rolling groove 2 for accommodating the ball 2 is arranged on the mounting ring 1, the mounting ring 2, the positioning ring 1 and the positioning ring 2, and the ball 2 is limited by the positioning ring 1 and the positioning ring 2, so that the ball 2 can only roll in the annular rolling groove 2, and then the rotating ring cannot move downward in the annular through hole, and the ball 2 can be removed from between the mounting ring 1 and the mounting ring 2 after the positioning ring 1 and the positioning ring 2 are removed;

[0023] The sealing ring 1 is located between the positioning ring 1 and the positioning ring 2. The side of the sealing ring 1 close to the positioning ring 1 is sealed and fixedly connected to the positioning ring 1. The side of the sealing ring 1 close to the positioning ring 2 is tightly and sealedly connected to the positioning ring 2. The sealing ring 1 is squeezed by the positioning ring 2 and bent in the axial direction away from the ball 1.

[0024] In one embodiment, the rotating ring does not contact the hole wall of the annular through hole, a second sealing ring is provided between the rotating ring and the hole wall of the annular through hole, and the second sealing ring is coaxial with the annular through hole;

[0025] The inner circumferential surface and outer circumferential surface of the rotating ring and the hole wall of the annular through hole are provided with equal height and coaxial annular grooves. The inner edge and outer edge of the second sealing ring are respectively inserted into the annular grooves of the rotating ring and the annular through hole, and are tightly and sealedly connected with the annular grooves.

[0026] In one embodiment, a plurality of guide plates are fixedly mounted on the upper surface of the annular box cover and are centrally symmetrically distributed with the central axis of the annular box cover as the center. The guide plate has an outer convex surface. The water flow sprayed from the nozzle hits the outer convex surface and is reflected onto the dust on the outer circumferential surface of the dust filter cylinder. At the same time, the nozzle is driven to drive the rotating ring to rotate on the annular water storage box.

[0027] In one embodiment, the outer convex surface is covered with pits.

[0028] Beneficial effect: The dust removal device for an electric arc furnace of the present application rotates around the filter cartridge through multiple nozzles to spray water onto the dust layer on the outer circumferential surface of the filter cartridge to moisten the dust. The dust layer includes an inner primary layer and an outer outer layer. The water spraying time is controlled to ensure that only the outer layer of dust is moistened. This design allows the dust blocks that are agglomerated at the connection between the primary layer and the outer layer and are located in the outer layer to absorb moisture and soften. When the scraper rises subsequently, only the outer layer of dust and the part of the dust blocks located in the outer layer can be scraped off without damaging the primary layer. This effectively avoids the problem of damaging the primary layer when dust blocks that are partially located in the primary layer and the remaining part in the outer layer are directly scraped off by the scraper, thereby ensuring that the dust removal efficiency of the dust removal equipment does not decrease after each cleaning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a dust removal device for an electric arc furnace according to the present invention;

[0031] Figure 2 yes Figure 1 A magnified view of part A in FIG.

[0032] Figure 3 yes Figure 2 A magnified view of part B in FIG.

[0033] Figure 4 yes Figure 3 The enlarged view of the C part in FIG.

[0034] Figure 5 yes Figure 4 The enlarged view of the D part in FIG.

[0035] Figure 6 Is a schematic diagram of the layout of the guide plate of the present invention;

[0036] Figure 7 yes Figure 6 The enlarged view of part E in FIG.

[0037] Figure 8 It is a structural schematic diagram of the guide plate.

[0038] The following are the descriptions of the reference numerals:

[0039] 1. Dust removal box; 2. Dust hopper; 3. Air inlet pipe; 4. Air inlet cover; 5. Air outlet pipe; 6. Partition; 7. Chamber 1; 8. Chamber 2; 9. Frame mesh cylinder; 10. Filter cylinder; 11. Primary layer; 12. Outer layer; 13. Scraper cylinder; 14. Connecting plate; 15. Guide column; 16. Leg; 17. Installation bottom surface; 18. Pull rope; 19. Guide cylinder; 20. Fixed pulley; 21. Rope winding roller; 22. Motor; 23. Chassis; 24. Support rod; 25. Annular box body; 26, water inlet pipe; 27, annular box cover; 28, rotating ring; 29, nozzle; 30, guide plate; 31, pit; 32, mounting ring one; 33, positioning ring one; 34, mounting ring two; 35, positioning ring two; 36, ball one; 37, annular rolling groove one; 38, ball two; 39, annular through hole; 40, sealing ring one; 41, reinforcement strip; 42, sealing ring two; 43, annular groove; 44, electric arc furnace; 45, annular rolling groove two. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] After long-term research, the inventor found that when oil and gas are mixed in the dust-containing exhaust gas, or the gas humidity is high, the accumulated dust outside the filter cartridge 10 is prone to form a plate. If part of the plated dust blocks are located in the primary layer 11 and the remaining part is located in the outer layer 12, when the scraper 13 is used to directly scrape the dust blocks, the scraper 13 will push the dust blocks to scratch a mark on the primary layer 11, causing damage to the primary layer 11 and affecting the dust removal efficiency. Based on this, the present invention proposes a dust removal device for an electric arc furnace 44, which rotates around the filter cartridge 10 through a plurality of nozzles 29 to spray water on the dust layer on the outer circumferential surface of the filter cartridge 10 to wet the dust. The dust layer includes an inner primary layer 11 and an outer layer 12. By controlling the water spraying time, only the dust in the outer layer 12 is wetted. With this design, the dust blocks at the connection between the primary layer 11 and the outer layer 12 can absorb moisture and soften partly in the outer layer 12. When the scraper 13 subsequently rises, only the dust in the outer layer 12 and the part of the dust blocks located in the outer layer 12 can be scraped off without damaging the primary layer 11. This effectively avoids the problem of damaging the primary layer 11 when dust blocks partially located in the primary layer 11 and the remaining part located in the outer layer 12 are directly scraped off by the scraper 13, thereby ensuring that the dust removal efficiency of the dust removal equipment does not decrease after each cleaning operation.

[0045] Specifically, in one embodiment of the invention, Figure 1 As shown, the dust removal device for the electric arc furnace 44 includes a dust removal box 1 and an air inlet pipe 3, an air outlet pipe 5, and an ash hopper 2 connected to the dust removal box 1. The air inlet end of the air inlet pipe 3 is connected to an air inlet hood 4. The air inlet hood 4 is located directly above the electric arc furnace 44. The smoke and exhaust gas generated during the operation of the electric arc furnace 44 enters the air inlet hood 4 and then enters the dust removal box 1 through the air inlet pipe 3. The ash hopper 2 is located at the lower end of the dust removal box 1. The lower end of the dust removal box 1 is also provided with a support leg 16, which is used to support the dust removal box 1, so as to facilitate the dust removal box 1 to be firmly installed and fixed on the installation bottom surface 17.

[0046] In this embodiment, if Figure 1 As shown, the dust removal box 1 is provided with: a partition 6, a dust filter cartridge, and a cleaning mechanism. The partition 6 divides the internal space of the dust removal box 1 into two unconnected upper and lower parts, chamber 1 7 and chamber 2 8. The chamber 1 7 is connected with the air inlet pipe 3 and the dust hopper 2, and the chamber 2 8 is connected with the air outlet pipe 5. The dust filter cartridge is located in chamber 1 7 and is fixedly connected to the partition 6. The internal space of the dust filter cartridge is connected with chamber 2 8. The gas in chamber 1 7 enters the interior of the dust filter cartridge, and then enters chamber 2 8, and is finally discharged from the air outlet pipe 5. The dust in the gas is filtered and remains on the outer wall of the dust filter cartridge.

[0047] Specifically, Figure 1 and Figure 2 As shown, the dust filter cylinder includes a frame mesh cylinder 9 and a filter cylinder 10 sleeved on the outer circumferential surface of the frame mesh cylinder 9, the dust filter cylinder is vertically arranged, the lower end of the frame mesh cylinder 9 is sealed, the gas cannot enter the frame mesh cylinder 9 from the lower end of the frame mesh cylinder 9, the side surface of the frame mesh cylinder 9 is made of mesh plate material, which does not affect the passage of gas, the upper end of the frame mesh cylinder 9 passes through the partition 6 and is connected with the chamber 2 8, and the frame mesh cylinder 9 is sealed and fixedly connected to the partition 6.

[0048] Preferably, the material of the filter cartridge 10 is the same as that of the dust removal bag.

[0049] Filtration principle: Dust-containing gas enters chamber one 7 through the air inlet pipe 3, and then the gas passes through the filter cartridge 10 and enters the frame mesh cylinder 9. The dust in the gas remains on the outer circumference of the filter cartridge 10. The gas in the frame mesh cylinder 9 enters chamber two 8 upward and is finally discharged from the air outlet pipe 5 to complete the gas filtration.

[0050] In this embodiment, a dust cleaning mechanism is further provided in the dust removal box 1 . The dust cleaning mechanism is provided below the dust filter cartridge and is used to scrape off the outer layer 12 of dust on the outer circumferential surface of the filter cartridge 10 .

[0051] Specifically, Figure 1-Figure 3 , Figure 6 and Figure 7 As shown, the dust cleaning mechanism includes a scraper 13, a lifting device, and an annular water storage box. The scraper 13 is coaxial with the dust filter cylinder. When the dust filter cylinder is vertically arranged, the scraper 13 is located directly below the dust filter cylinder.

[0052] Further, such as Figure 1 and Figure 2 As shown, there are multiple scraper drums 13, and the multiple scraper drums 13 are fixedly connected by a connecting plate 14. A guide column 15 is vertically slidably installed on the connecting plate 14. The guide column 15 is fixedly connected to the dust removal box 1. This design can ensure that the scraper drum 13 is smoothly raised and lowered, and the outer layer 12 of dust is accurately scraped off without damaging the primary layer 11 of dust.

[0053] In this embodiment, the lifting device is fixedly installed in the dust removal box 1 and is connected to the scraper 13, and is used to drive the scraper 13 to rise axially along the dust filter cylinder to remove the outer layer 12 of dust on the outer circumferential surface of the dust filter cylinder; specifically, Figure 1 As shown, the lifting device includes a guide cylinder 19, a fixed pulley 20, a pull rope 18, a chassis 23, a motor 22, and a rope winding roller 21. The guide cylinder 19 is vertically slidably installed on the connecting plate 14. The guide cylinder 19 is fixedly connected to the dust removal box 1. The upper end of the guide cylinder 19 is installed with a fixed pulley 20. The pull rope 18 is wound around the fixed pulley 20. One end of the pull rope 18 is located outside the guide cylinder 19 and is connected to the connecting plate 14. The other end of the pull rope 18 is located inside the guide cylinder 19 and extends from the lower end of the guide cylinder 19. The lower end of the guide cylinder 19 is sealed and fixed. A chassis 23 is installed. With this design, no rapid airflow will be formed in the guide cylinder 19, which can prevent dust from accumulating in large quantities in the chassis 23, thereby ensuring the normal operation of the motor 22 and the rope winding roller 21. The chassis 23 is provided with a motor 22 and a rope winding roller 21 transmission-connected to the motor 22. A pull rope 18 extending from the lower end of the guide cylinder 19 is wound around the rope winding roller 21. The motor 22 is a brake motor 22. The control motor 22 drives the rope winding roller 21 to rotate, and the pull rope 18 is used to pull the connecting plate 14 to rise and fall along the guide column 15 and the guide cylinder 19 to realize the lifting and lowering of the scraper cylinder 13.

[0054] In this embodiment, if Figure 2 and Figure 3 As shown, the annular water storage box is fixedly mounted on the upper end of the scraper cylinder 13 through a support rod 24 and is coaxial with the scraper cylinder 13. A rotating ring 28 is coaxially and rotatably sealed on the annular water storage box. A plurality of nozzles 29 are sealed and fixedly mounted on the rotating ring 28. The nozzles 29 can spray water to the dust on the outer circumferential surface of the dust filter cylinder. The nozzles 29 are connected to the inside of the annular water storage box. The annular water storage box is connected to a water inlet pipe 26. External clean water enters the annular water storage box through the water inlet pipe 26 and is then sprayed out from the nozzles 29. The dust in the outer layer 12 is moistened. Such a design can make the dust blocks that are clumped together at the connection between the primary layer 11 and the outer layer 12 located in the outer layer 12 absorb moisture and soften. When the scraper 13 rises subsequently, only the dust in the outer layer 12 and the dust blocks located in the outer layer 12 can be scraped off without damaging the primary layer 11. This effectively avoids the problem of damaging the primary layer 11 when the dust blocks that are partially located in the primary layer 11 and the remaining part in the outer layer 12 are directly scraped off by the scraper 13, thereby ensuring that the dust removal efficiency of the dust removal equipment does not decrease after each cleaning operation.

[0055] Specifically, Figure 2 and Figure 3As shown, the annular water storage box includes an annular box body 25 and an annular box cover 27 which is detachably and sealedly fixedly connected to the annular box body 25. The annular box cover 27 is provided with a coaxial annular through hole 39. A coaxial rotating ring 28 is provided through the annular through hole 39. The rotating ring 28 is rotatably and sealably connected to the annular box cover 27. The rotating ring 28 rotates on the annular box cover 27 to drive the nozzle 29 to rotate around the filter cartridge 10, and the scraper 13 rises to remove the outer layer of the dust filter cartridge on the outer circumference. The dust on the outer layer 12 is sprayed with water to moisten it, and then the dust blocks that are clumped together at the connection between the primary layer 11 and the outer layer 12 are partially moistened and softened. When the scraper 13 subsequently rises, only the dust on the outer layer 12 and the part of the dust blocks located in the outer layer 12 can be scraped off without damaging the primary layer 11, effectively avoiding the problem of damaging the primary layer 11 when the dust blocks that are partially located in the primary layer 11 and the remaining part in the outer layer 12 are directly scraped off by the scraper 13, thereby ensuring that the dust removal efficiency of the dust removal equipment does not decrease after each cleaning operation.

[0056] Specifically, Figure 3 and Figure 4 As shown, a mounting ring 32 is coaxially and sealedly fixedly installed on the inner circumferential surface and the outer circumferential surface of the rotating ring 28, and the mounting ring 32 and the inner side surface of the annular box cover 27 are spaced apart. The inner side surface of the annular box cover 27 and the side surface of the mounting ring 32 facing the annular box cover 27 are both provided with an annular rolling groove 37 coaxial with the mounting ring 32, and a plurality of balls 36 are rollingly installed in the annular rolling groove 37. Furthermore, the plurality of balls 36 can maintain relative positions unchanged by a retaining frame, and the balls 36 can only roll on the annular rolling groove 37. With this design, when high-pressure water is injected into the annular water storage box, the mounting ring 32 and the annular box cover 27 can still be connected to each other through the balls 36 for normal rotation, and the problem of high water pressure affecting the rotation of the rotating ring 28 will not occur.

[0057] In this embodiment, if Figure 3 and Figure 4 As shown, a second mounting ring 34 is coaxially and sealedly fixedly installed on the inner side surface of the annular box cover 27. There are two second mounting rings 34, and the inner and outer diameters are different. The two second mounting rings 34 are arranged on both sides of the annular through hole 39, that is, the annular through hole 39 and the second mounting ring 34 are coaxial, and the annular through hole 39 is located between the two second mounting rings 34.

[0058] In this embodiment, if Figure 3 and Figure 4As shown, the second mounting ring 34 is spaced apart from the first mounting ring 32, and a sealing ring 40 is arranged between the first mounting ring 32 and the second mounting ring 34. The sealing ring 40 is made of rubber and has a reinforcing strip 41 made of metal inside to enhance the mechanical strength of the sealing ring 40. After all, the sealing ring 40 made of rubber is prone to bend and deform greatly under high pressure, affecting the sealing effect. The sealing ring 40 is coaxial with the rotating ring 28, and the side of the sealing ring 40 close to the mounting ring 32 is sealed and fixedly connected to the mounting ring 32. The side of ring 1 40 close to mounting ring 2 34 is tightly and sealedly connected to mounting ring 2 34, and the sealing ring 1 40 is squeezed by mounting ring 2 34 to be bent in the axial direction away from ball 1 36. With this design, the bent sealing ring 1 40 can withstand the high-pressure water in the annular water storage box, and further slight deformation of the sealing ring 1 40 will not affect its tight sealing performance with mounting ring 2 34, and the sealing ring 1 40 will not be further excessively bent and deformed, thereby ensuring a good sealing effect, thereby realizing the rotational sealing connection between the rotating ring 28 and the annular box cover 27.

[0059] In this embodiment, when the annular box cover 27 is located at the upper end of the annular box body 25, in order to prevent the rotating ring 28 from moving downward in the annular through hole 39, as shown in FIG. Figure 3 and Figure 4 As shown, a plurality of balls 38 are arranged between the mounting ring 1 32 and the mounting ring 2 34. The plurality of balls 38 can be positioned by a retaining frame like the plurality of balls 36. A positioning ring 33 is detachably and sealedly fixedly installed on the side of the mounting ring 1 32 away from the ball 1 36. A positioning ring 2 35 is detachably and sealedly fixedly installed on the side of the mounting ring 2 34 facing the mounting ring 1 32. The positioning ring 1 33, the positioning ring 2 35 and the mounting ring 1 32 are coaxial. The mounting ring 1 32, the mounting ring 2 34, the positioning ring 1 33 and the positioning ring 2 35 are provided with an annular rolling groove 2 45 for accommodating the ball 2 38. The ball 38 is fixedly positioned by the positioning ring 1 33 and the positioning ring 2 35. The second ring 38 is limited so that the ball 2 38 can only roll in the annular rolling groove 2 45, and then the rotating ring 28 cannot move downward in the annular through hole 39 and can only rotate. After removing the positioning ring 1 33 and the positioning ring 2 35, the ball 2 38 can be removed from between the mounting ring 1 32 and the mounting ring 2 34; at this time, the sealing ring 1 40 is located between the positioning ring 1 33 and the positioning ring 2 35, and the side of the sealing ring 1 40 close to the positioning ring 1 33 is sealed and fixedly connected to the positioning ring 1 33, and the side of the sealing ring 1 40 close to the positioning ring 2 35 is tightly and sealedly connected to the positioning ring 2 35, and the sealing ring 1 40 is squeezed by the positioning ring 2 35 to bend in the axial direction away from the ball 1 36.

[0060] Furthermore, in order to reduce the rotation resistance of the rotating ring 28, as Figure 4 and Figure 5As shown, the rotating ring 28 does not contact the hole wall of the annular through hole 39. In order to prevent foreign objects from getting stuck and affecting the rotation of the rotating ring 28, a sealing ring 42 is provided between the rotating ring 28 and the hole wall of the annular through hole 39. The sealing ring 42 is coaxial with the annular through hole 39. The inner circumferential surface and the outer circumferential surface of the rotating ring 28 and the hole wall of the annular through hole 39 are provided with annular grooves 43 of equal height and coaxiality. The inner edge and the outer edge of the sealing ring 42 are respectively stuck in the annular grooves 43 of the rotating ring 28 and the annular through hole 39, and are tightly and sealedly connected with the annular grooves 43. The annular through hole 39 is sealed by the sealing ring 42 to prevent foreign objects from getting stuck in the gap between the rotating ring 28 and the annular through hole 39 and affecting the rotation of the rotating ring 28.

[0061] In this embodiment, if Figure 3 , Figure 6 and Figure 7 As shown, a plurality of guide plates 30 are fixedly mounted on the upper surface of the annular box cover 27 and are centrally symmetrically distributed with the central axis of the annular box cover 27 as the center. The guide plate 30 has an outer convex surface. The water flow sprayed by the nozzle 29 hits the outer convex surface and is reflected to the dust on the outer circumferential surface of the dust filter cylinder to wet the outer layer 12 of dust. At the same time, the nozzle 29 is driven by the recoil force of the water spray to drive the rotating ring 28 to rotate on the annular water storage box. This design saves the trouble of setting up an additional driving power drive mechanism to drive the rotating ring 28 to rotate. It is very useful in high dust environments. Figure 6 and Figure 7 As shown, according to the diameter of the annular box cover 27, a suitable number of guide plates 30 are arranged, and a convex surface with a suitable curvature is selected, and a suitable installation angle of the guide plate 30 is selected, so as to achieve Figure 6 and Figure 7 The water spraying range L reflected by the two adjacent guide plates 30 onto the dust on the outer layer 12 of the outer circumferential surface of the dust filter cartridge partially overlaps, so that as the rotating ring 28 rotates and the scraper cylinder 13 rises, multiple nozzles 29 can completely wet the dust on the outer layer 12 of the outer circumferential surface of the dust filter cartridge.

[0062] In this embodiment, during the rotation of the rotating ring 28, the scraper 13 slowly rises, so as to wet the dust on the outer layer 12 while scraping off the dust on the outer layer 12, thereby improving the cleaning efficiency.

[0063] In this embodiment, further, Figure 8 As shown, the outer convex surface is covered with pits 31. The arrangement of the pits 31 makes the outer convex surface rough, which helps the water flow hitting the outer convex surface to spread over a larger range and make the water flow more uniform, thereby wetting the dust on the outer layer 12 more uniformly.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dust removal device for an electric arc furnace, comprising a dust removal box and an air inlet pipe, an air outlet pipe, and an ash hopper connected to the dust removal box, wherein the air inlet end of the air inlet pipe is connected to an air inlet hood, and the air inlet hood is located directly above the electric arc furnace, characterized in that: The dust removal box is provided with: A partition, wherein the partition divides the internal space of the dust removal box into two unconnected parts, chamber one and chamber two, wherein chamber one is connected to an air inlet pipe and an ash hopper, and chamber two is connected to an air outlet pipe; A dust filter cartridge is located in chamber one and is fixedly connected to the partition, and the inner space of the dust filter cartridge is connected to chamber two; A dust cleaning mechanism is provided below the dust filter cartridge, the dust cleaning mechanism comprising; The scraper cylinder is coaxial with the dust filter cylinder; The lifting device is fixedly installed in the dust removal box and connected to the scraper, and is used to drive the scraper to rise along the axial direction of the dust filter cylinder to remove the outer layer of dust on the outer circumferential surface of the dust filter cylinder; An annular water storage box is fixedly mounted on the upper end of the scraper drum and is coaxial with the scraper drum. A rotating ring is coaxially and rotatably mounted on the annular water storage box. A plurality of nozzles are sealably and fixedly mounted on the rotating ring. The nozzles can spray water to the dust on the outer circumferential surface of the dust filter drum. The nozzles are connected to the inside of the annular water storage box. The annular water storage box is connected to a water inlet pipe. The annular water storage box comprises an annular box body and an annular box cover which is detachably and sealedly fixedly connected to the annular box body, the annular box cover is provided with a coaxial annular through hole, a coaxial rotating ring is penetrated through the annular through hole, and the rotating ring is rotationally and sealably connected to the annular box cover; A mounting ring 1 is coaxially fixedly installed on the inner circumferential surface and the outer circumferential surface of the rotating ring, the mounting ring 1 and the inner side surface of the annular box cover are arranged at intervals, and the inner side surface of the annular box cover and the side surface of the mounting ring 1 facing the annular box cover are both provided with an annular rolling groove 1 coaxial with the mounting ring, and a plurality of balls 1 are rollingly installed in the annular rolling groove 1; A second mounting ring is coaxially fixedly installed on the inner side surface of the annular box cover. The second mounting ring has two strips, which are arranged on both sides of the annular through hole and are spaced apart from the first mounting ring. A sealing ring is arranged between the first mounting ring and the second mounting ring. The first sealing ring is coaxial with the rotating ring. The side of the first sealing ring close to the first mounting ring is sealed and fixedly connected to the first mounting ring. The side of the first sealing ring close to the second mounting ring is tightly sealed and connected to the second mounting ring. The first sealing ring is squeezed by the second mounting ring and bent in the axial direction away from the first ball. A plurality of guide plates are fixedly mounted on the upper surface of the annular box cover and are centrally symmetrically distributed with the central axis of the annular box cover as the center. The guide plate has an outer convex surface. The water flow sprayed from the nozzle hits the outer convex surface and is reflected onto the dust on the outer circumferential surface of the dust filter cylinder. At the same time, the nozzle is driven to drive the rotating ring to rotate on the annular water storage box.

2. A dust removal device for an electric arc furnace as claimed in claim 1, characterized in that: The dust filter cylinder comprises a frame mesh cylinder and a filter cylinder sleeved on the outer circumferential surface of the frame mesh cylinder, the lower end of the frame mesh cylinder is sealed, and the upper end of the frame mesh cylinder passes through the partition plate and communicates with the second chamber; The dust filter cylinder is arranged vertically.

3. A dust removal device for an electric arc furnace as claimed in claim 1, characterized in that: There are multiple scraper cylinders, and the multiple scraper cylinders are fixedly connected through a connecting plate. A guide column is vertically slidably installed on the connecting plate, and the guide column is fixedly connected to the dust removal box.

4. A dust removal device for an electric arc furnace as claimed in claim 3, characterized in that: A guide cylinder is vertically slidably mounted on the connecting plate, and the guide cylinder is fixedly connected to the dust removal box; A fixed pulley is installed at the upper end of the guide cylinder, and a pull rope is wound on the fixed pulley. One end of the pull rope is located outside the guide cylinder and connected to the connecting plate, and the other end of the pull rope is located in the guide cylinder and extends out from the lower end of the guide cylinder. A chassis is sealed and fixedly installed at the lower end of the guide cylinder, and a motor and a rope winding roller transmission-connected to the motor are arranged in the chassis. The pull rope extending from the lower end of the guide cylinder is wound around the rope winding roller.

5. The dust removal device for an electric arc furnace according to claim 1, characterized in that: The annular box cover is located at the upper end of the annular box body; A plurality of balls 2 are arranged between the mounting ring 1 and the mounting ring 2, a positioning ring 1 is detachably and sealedly fixedly installed on the side of the mounting ring 1 facing away from the ball 1, and a positioning ring 2 is detachably and sealedly fixedly installed on the side of the mounting ring 2 facing the mounting ring 1, the positioning ring 1, the positioning ring 2 and the mounting ring are coaxial, and an annular rolling groove 2 for accommodating the ball 2 is arranged on the mounting ring 1, the mounting ring 2, the positioning ring 1 and the positioning ring 2, and the ball 2 is limited by the positioning ring 1 and the positioning ring 2, so that the ball 2 can only roll in the annular rolling groove 2, and then the rotating ring cannot move downward in the annular through hole, and the ball 2 can be removed from between the mounting ring 1 and the mounting ring 2 after the positioning ring 1 and the positioning ring 2 are removed; The sealing ring 1 is located between the positioning ring 1 and the positioning ring 2. The side of the sealing ring 1 close to the positioning ring 1 is sealed and fixedly connected to the positioning ring 1. The side of the sealing ring 1 close to the positioning ring 2 is tightly and sealedly connected to the positioning ring 2. The sealing ring 1 is squeezed by the positioning ring 2 and bent in the axial direction away from the ball 1.

6. The dust removal device for an electric arc furnace according to claim 1, characterized in that: The rotating ring does not contact the hole wall of the annular through hole, and a second sealing ring is arranged between the rotating ring and the hole wall of the annular through hole, and the second sealing ring is coaxial with the annular through hole; The inner circumferential surface and outer circumferential surface of the rotating ring and the hole wall of the annular through hole are provided with equal height and coaxial annular grooves. The inner edge and outer edge of the second sealing ring are respectively inserted into the annular grooves of the rotating ring and the annular through hole, and are tightly and sealedly connected with the annular grooves.

7. The dust removal device for an electric arc furnace according to claim 1, characterized in that: The outer convex surface is covered with pits.

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