Dust removal device for electric arc furnace

Abstract

The utility model relates to a dust removal device for an electric arc furnace, which comprises a rack, the rack is arranged on one side of the electric arc furnace, a dust collection assembly is arranged on the rack, the dust collection assembly comprises a dust collection cover, a smoke dust filter and a fan, the dust collection cover is arranged on the rack, the smoke dust filter is arranged on the rack, and the smoke dust filter is connected with the dust collection cover. The fan is arranged on one side of the smoke filter, a connecting cover is slidably connected to the dust suction cover, one side of the connecting cover covers the top of the electric arc furnace, and a lifting part is arranged on the dust suction cover; the lifting piece drives the connecting cover to move to cover the top of the electric arc furnace, the draught fan is started, the dust suction cover sucks smoke to the smoke filter through the connecting cover to be filtered, then the smoke is discharged through the draught fan, the top of the electric arc furnace is covered with the dust suction cover in the working process, the smoke is not prone to escaping from the top, and the electric arc furnace dust removal device has the good dust removal effect.

Description

Technical Field

[0001] This application relates to the field of electric arc furnaces, and more particularly to a dust removal device for electric arc furnaces. Background Technology

[0002] An electric arc furnace is an electric furnace that uses the high temperature generated by an electric arc on an electrode to melt ores and metals. For melting metals, electric arc furnaces are more flexible than other steelmaking furnaces, can effectively remove impurities such as sulfur and phosphorus, have easy temperature control, and require less floor space, making them suitable for melting high-quality alloy steels.

[0003] The fumes generated during the smelting process of electric arc furnaces mainly originate from high-temperature reactions, metal evaporation, and impurities in scrap steel. These fumes pollute the environment and harm the health of operators, necessitating the installation of dust removal devices. These devices typically include a dust collection hood, a fan, and filter components for filtering the fumes. The dust collection hood is installed inside the workshop, located on top of the electric arc furnace, and connected to the filter components via ductwork. The fan is positioned on the side of the filter components facing away from the ductwork. During operation, the fan draws the fumes from the workshop through the ductwork, transports them to the filter components for filtration, and then discharges them. The filter components collect the fumes.

[0004] When the electric arc furnace is working, the dust collection hood collects and removes the smoke and dust. However, the dust collection hood is always separated from the electric arc furnace, which makes it easy for the smoke and dust to escape, resulting in poor dust removal. Utility Model Content

[0005] To address the problem of smoke and dust escaping due to separation between the dust hood and the electric arc furnace, resulting in poor dust removal efficiency, this application provides a dust removal device for electric arc furnaces.

[0006] The dust removal device for an electric arc furnace provided in this application adopts the following technical solution:

[0007] A dust removal device for an electric arc furnace includes a frame disposed on one side of the electric arc furnace. A dust collection assembly is disposed on the frame, comprising a dust collection hood for collecting smoke and dust, a smoke and dust filter for filtering smoke and dust, and a fan for providing negative pressure suction. The dust collection hood is disposed on the frame and located at the top of the electric arc furnace. The smoke and dust filter is disposed on the frame and connected to the dust collection hood. The fan is disposed on the side of the smoke and dust filter away from the dust collection hood. A connecting cover is slidably connected to the dust collection hood. The connecting cover slides along a side facing or away from the electric arc furnace, and one side of the connecting cover covers the top of the electric arc furnace. A lifting component is disposed on the dust collection hood for driving the movement of the connecting cover.

[0008] By adopting the above technical solution, the lifting component moves the connecting cover toward one side of the electric arc furnace, and one side of the connecting cover covers the top of the electric arc furnace. At this time, the fan starts, and the dust suction hood sucks the smoke and dust through the connecting cover to the dust filter for filtration, and then discharges it through the fan. When it is necessary to discharge material, the lifting component moves the connecting cover away from the electric arc furnace, and the electric arc furnace discharges material. During operation, the dust suction hood covers the top of the electric arc furnace, and the smoke and dust are not easy to escape from the top, resulting in a better dust removal effect.

[0009] Optionally, the lifting component includes a lead screw and a lifting motor. The dust collection hood is provided with a mounting bracket. The lead screw is rotatably mounted on the mounting bracket. The lifting motor is mounted on the mounting bracket. The lead screw is connected to the output shaft of the lifting motor. A slider is slidably mounted on the mounting bracket in the direction toward or away from the electric arc furnace. The slider is threadedly connected to the lead screw. The slider is connected to one side of the connecting cover.

[0010] By adopting the above technical solution, the lifting motor drives the lead screw to rotate, which in turn drives the slider to slide. The slider drives the connecting cover to move. When one side of the connecting cover moves to abut against one side of the electric arc furnace, it stops moving. Adjusting the connecting cover makes the opening and closing operation of the top of the electric arc furnace convenient. At the same time, the position of the connecting cover can be adjusted, making it suitable for covering and vacuuming the top of electric arc furnaces of different heights.

[0011] Optionally, the mounting bracket is provided with a guide rod, the length direction of which is consistent with the axial direction of the connecting cover, and the slider is slidably connected to the guide rod.

[0012] By adopting the above technical solution, when the slider slides, it slides along the length direction of the guide rod, thus guiding and limiting the movement of the slider.

[0013] Optionally, a connecting rod is provided on the side of the slider away from the lifting motor, and the end of the connecting rod away from the slider is connected to one side of the connecting cover.

[0014] By adopting the above technical solution, the slider is connected to the connecting cover via the connecting rod, which extends the moving distance of the connecting cover and increases its applicable range.

[0015] Optionally, a rotating rod is rotatably mounted on one side of the electric arc furnace on the frame. The rotating rod is connected to the dust collection hood, and the rotation axis of the rotating rod is aligned with the axis of the connecting hood. A rotating component is provided on the frame to drive the rotating rod to rotate.

[0016] By adopting the above technical solution, the rotating component drives the rotating rod to rotate, and the rotating rod drives the dust collection hood to rotate until it is separated from the electric arc furnace. At this time, it is convenient to rotate and tilt the electric arc furnace to discharge the material. After the material is discharged, the dust collection hood is rotated back to its position, and then the connecting hood is driven to move to one side of the electric arc furnace for dust collection, which facilitates the material discharge operation of the electric arc furnace.

[0017] Optionally, the rotating component includes a rotating motor and a first gear, the rotating rod is coaxially connected to a second gear, the first gear is rotatably mounted on the frame and meshes with one side of the second gear, the rotating motor is mounted on the frame, and the first gear is coaxially connected to the output shaft of the rotating motor.

[0018] By adopting the above technical solution, the rotating motor drives the first gear to rotate, the first gear drives the meshing second gear to rotate, and in turn drives the rotating rod to rotate, making the operation of driving the rotating rod to rotate convenient.

[0019] Optionally, the frame is provided with a heat exchange box connected to the dust hood, the dust filter is connected to the side of the heat exchange box away from the dust hood, the heat exchange box is provided with heat exchange coils, the heat exchange coils are distributed in a serpentine pattern, and the two ends of the heat exchange coils are connected to an external water supply circulation system.

[0020] By adopting the above technical solution, the flue gas undergoes heat exchange at the heat exchange box, while the external water supply circulation system delivers cooling water to the heat exchange coil. The flue gas exchanges heat with the heat exchange coil, and the cooling water is heated and then delivered out of the heat exchange box. The flue gas is cooled and then delivered to the flue gas filter for filtration. The cooling and filtration reduces the probability of high-temperature flue gas damaging the equipment, and at the same time, the waste heat of the flue gas is recovered, reducing energy waste.

[0021] Optionally, the dust collection hood is provided with air guide plates, which are distributed vertically, and there are several air guide plates that are distributed parallel to each other at intervals.

[0022] By adopting the above technical solution, multiple air guide plates are set to guide the air intake of the dust collection hood. At the same time, the multiple air guide plates are distributed in parallel and at intervals to even out the air intake, resulting in a better dust collection effect.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The lifting component moves the connecting cover toward one side of the electric arc furnace. One side of the connecting cover covers the top of the electric arc furnace. The fan starts, and the dust collection hood sucks the smoke and dust through the connecting cover to the dust filter for filtration, and then discharges it through the fan. During operation, the dust collection hood covers the top of the electric arc furnace, so the smoke and dust are not easy to escape from the top, and the dust removal effect is good.

[0025] 2. After the flue gas is cooled, it is then transported to the flue gas filter for filtration. Cooling and filtration reduce the probability of high-temperature flue gas damaging the equipment, and at the same time, waste heat is recovered from the flue gas to reduce energy waste.

[0026] 3. Multiple air guide plates are distributed in parallel at intervals to even out the incoming airflow and achieve better dust collection. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of this application.

[0028] Figure 2 This is a cross-sectional view of the dust hood in this application along the vertical direction.

[0029] Figure 3 This is a three-dimensional structural diagram of the lifting component on one side of the mounting frame of this application.

[0030] Figure 4 This is an enlarged three-dimensional structural diagram of part A of this application.

[0031] Figure 5 This is a sectional view of the heat exchange box of this application along the vertical direction.

[0032] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0033] Reference numerals: 1. Frame; 11. Rotating rod; 12. Connecting plate; 2. Dust hood; 21. Connecting cover; 22. Mounting bracket; 23. Slider; 231. Connecting rod; 24. Guide rod; 25. Air guide plate; 3. Smoke filter; 4. Fan; 5. Electric arc furnace; 6. Lifting component; 61. Lead screw; 62. Lifting motor; 7. Rotating component; 71. Rotating motor; 72. First gear; 73. Second gear; 8. Heat exchange box; 81. Heat exchange coil. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] This application discloses a dust removal device for an electric arc furnace 5, referring to... Figure 1 and Figure 2 The system includes a frame 1, which is located on one side of the electric arc furnace 5. A dust collection assembly is installed on the frame 1. The dust collection assembly includes a dust collection hood 2 for collecting smoke and dust, a smoke and dust filter 3 for filtering smoke and dust, and a fan 4 for providing negative pressure suction. The dust collection hood 2 is located on the frame 1 and at the top of the electric arc furnace 5. The lower side of the dust collection hood 2 is arranged in a ring shape. The smoke and dust filter 3 is located on the frame 1 and is connected to the dust collection hood 2 through a duct. The smoke and dust filter 3 is a bag filter. The fan 4 is located on the side of the smoke and dust filter 3 away from the dust collection hood 2. When the fan 4 is started, the dust collection hood 2 draws the smoke and dust to the smoke and dust filter 3 through the connecting cover 21 for filtration, and then discharges it through the fan 4.

[0036] Reference Figure 1 and Figure 2A connecting cover 21 is slidably connected to the dust collection hood 2 on its outer circumferential wall. The connecting cover 21 is arranged in a ring and slides vertically. One side of the bottom edge of the connecting cover 21 covers the top of the electric arc furnace 5. The dust collection hood 2 is equipped with a lifting component 6 for driving the connecting cover 21 to move. The lifting component 6 moves the connecting cover 21 toward one side of the electric arc furnace 5, and the connecting cover 21 covers the top of the electric arc furnace 5. When material needs to be discharged, the lifting component 6 moves the connecting cover 21 away from the electric arc furnace 5, and the electric arc furnace 5 discharges material. During operation, the dust collection hood 2 covers the top of the electric arc furnace 5, making it difficult for smoke and dust to escape from the top, resulting in a better dust removal effect.

[0037] Reference Figure 2 The dust collection hood 2 is equipped with air guide plates 25, which are distributed vertically. Several air guide plates 25 are arranged in parallel and spaced apart from each other. The multiple air guide plates 25 guide the air intake of the dust collection hood 2, and the parallel and spaced distribution of the multiple air guide plates 25 evenly distributes the incoming air, resulting in a better effect on the collection of smoke and dust.

[0038] Reference Figure 2 and Figure 3 The lifting component 6 includes a lead screw 61 and a lifting motor 62. A mounting bracket 22 is provided on the upper side of the dust hood 2 along the vertical direction. The lead screw 61 is vertically rotatably mounted on the mounting bracket 22. The lifting motor 62 is positioned downwards at the top of the mounting bracket 22. The lead screw 61 and the output shaft of the lifting motor 62 are coaxially connected. A slider 23 is slidably mounted on the mounting bracket 22 along the vertical direction. The slider 23 is threadedly connected to the lead screw 61.

[0039] Reference Figure 3 The mounting bracket 22 has two guide rods 24 vertically arranged on opposite sides of the lead screw 61. The slider 23 is slidably connected to the guide rods 24. A connecting rod 231 is vertically arranged on the lower side of the slider 23. One end of the bottom of the connecting rod 231 is connected to the upper side of the connecting cover 21.

[0040] The lifting motor 62 drives the lead screw 61 to rotate, which in turn drives the slider 23 to slide. The slider 23 drives the connecting cover 21 to move. When one side of the connecting cover 21 moves to abut against one side of the electric arc furnace 5, it stops moving. This makes it convenient to adjust the opening and closing operation of the connecting cover 21 on the top of the electric arc furnace 5. At the same time, it can also make it convenient to adjust the vertical height of the connecting cover 21. It is suitable for covering and vacuuming the top of the electric arc furnace 5 at different heights.

[0041] Reference Figure 4 The frame 1 is vertically mounted on one side of the electric arc furnace 5 with a rotating rod 11. A horizontal connecting plate 12 is provided on the outer peripheral wall of the rotating rod 11. The end of the connecting plate 12 away from the rotating rod 11 is connected to the dust hood 2 on the side away from the mounting frame 22 and facing upward.

[0042] Reference Figure 4The frame 1 is provided with a rotating component 7, which includes a rotating motor 71 and a first gear 72. A second gear 73 is coaxially fixedly connected to the bottom of the rotating rod 11. The first gear 72 is horizontally rotatably mounted on the frame 1 and located on one side of the rotating rod 11. The first gear 72 meshes with the second gear 73 on one side. The rotating motor 71 is vertically mounted on the frame 1, and the first gear 72 is coaxially connected to the output shaft of the rotating motor 71.

[0043] The rotating motor 71 drives the first gear 72 to rotate, the first gear 72 drives the meshing second gear 73 to rotate, which in turn drives the rotating rod 11 to rotate. The rotating rod 11 drives the dust collection hood 2 to rotate in the horizontal direction. When it is necessary to discharge material, the dust collection hood 2 rotates to separate from the electric arc furnace 5. At this time, the electric arc furnace 5 rotates and tilts to discharge material. After the material discharge is completed, the dust collection hood 2 is rotated back to its original position, and the connecting cover 21 is driven to move to one side of the electric arc furnace 5 to perform dust collection operations. This has little impact on the material discharge operations of the electric arc furnace 5.

[0044] Reference Figure 5 A heat exchange box 8 is installed on the frame 1. The heat exchange box 8 is connected to the air duct of the dust hood 2. The dust filter 3 is connected to the side of the heat exchange box 8 away from the dust hood 2. A heat exchange coil 81 is installed inside the heat exchange box 8. The heat exchange coil 81 is distributed in a serpentine pattern. Both ends of the heat exchange coil 81 are connected to the external water supply circulation system. The dust exchanges heat at the heat exchange box 8. At the same time, the external water supply circulation system delivers cooling water to the heat exchange coil 81. The dust exchanges heat with the heat exchange coil 81. The heated cooling water is then delivered out of the heat exchange box 8 to cool the dust before filtration. The cooling filtration reduces the probability of high-temperature dust damaging the equipment. At the same time, the waste heat of the dust is recovered, reducing energy waste.

[0045] The implementation principle of a dust removal device for an electric arc furnace according to an embodiment of this application is as follows: During operation, the lifting motor 62 drives the lead screw 61 to rotate, which drives the slider 23 to slide and then drives the connecting cover 21 to be installed on the top of the electric arc furnace 5. At this time, the fan 4 starts, and the dust suction cover 2 sucks the smoke and dust to the heat exchange box 8 for cooling. After being removed by the dust collector, the smoke and dust are discharged by the fan 4.

[0046] When it is necessary to discharge material from the electric arc furnace 5, the lifting motor 62 drives the connecting cover 21 to move to separate from the electric arc furnace 5. At this time, the rotating motor 71 drives the first gear 72 to drive the second gear 73 to rotate, which in turn drives the rotating rod 11 to rotate. The rotating rod 11 drives the dust suction cover 2 to rotate to separate from the position of the electric arc furnace 5. At this time, the electric arc furnace 5 is tilted to discharge material. After the operation is completed, it returns to its position for the next operation.

[0047] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dust removal device for an electric arc furnace, comprising a frame (1) disposed on one side of an electric arc furnace (5), wherein a dust collection assembly is disposed on the frame (1), the dust collection assembly comprising a dust collection hood (2) for collecting smoke and dust, a smoke and dust filter (3) for filtering smoke and dust, and a fan (4) for providing negative pressure suction, characterized in that: The dust hood (2) is mounted on the frame (1) and located on top of the electric arc furnace (5). The dust filter (3) is mounted on the frame (1) and connected to the dust hood (2). The fan (4) is mounted on the side of the dust filter (3) away from the dust hood (2). A connecting cover (21) is slidably connected to the dust hood (2). The connecting cover (21) slides along the side facing or away from the electric arc furnace (5). One side of the connecting cover (21) covers the top of the electric arc furnace (5). The dust hood (2) is provided with a lifting component (6) for driving the connecting cover (21) to move.

2. The dust removal device for an electric arc furnace according to claim 1, characterized in that: The lifting component (6) includes a lead screw (61) and a lifting motor (62). A mounting bracket (22) is provided on the dust collection hood (2). The lead screw (61) is rotatably mounted on the mounting bracket (22). The lifting motor (62) is mounted on the mounting bracket (22). The lead screw (61) is connected to the output shaft of the lifting motor (62). A slider (23) is slidably mounted on the mounting bracket (22) in the direction toward or away from the electric arc furnace (5). The slider (23) is threadedly connected to the lead screw (61). The slider (23) is connected to one side of the connecting cover (21).

3. The dust removal device for an electric arc furnace according to claim 2, characterized in that: The mounting bracket (22) is provided with a guide rod (24), the length direction of the guide rod (24) is consistent with the axial direction of the connecting cover (21), and the slider (23) is slidably connected to the guide rod (24).

4. A dust removal device for an electric arc furnace according to claim 2, characterized in that: A connecting rod (231) is provided on the side of the slider (23) away from the lifting motor (62), and the end of the connecting rod (231) away from the slider (23) is connected to the side of the connecting cover (21).

5. A dust removal device for an electric arc furnace according to claim 1, characterized in that: The frame (1) is rotatably mounted on one side of the electric arc furnace (5) with a rotating rod (11). The rotating rod (11) is connected to the dust hood (2). The rotation axis of the rotating rod (11) is aligned with the axis of the connecting cover (21). The frame (1) is provided with a rotating component (7) for driving the rotating rod (11) to rotate.

6. A dust removal device for an electric arc furnace according to claim 5, characterized in that: The rotating component (7) includes a rotating motor (71) and a first gear (72). The rotating rod (11) is coaxially connected to a second gear (73). The first gear (72) is rotatably mounted on the frame (1) and meshes with one side of the second gear (73). The rotating motor (71) is mounted on the frame (1). The first gear (72) is coaxially connected to the output shaft of the rotating motor (71).

7. A dust removal device for an electric arc furnace according to claim 1, characterized in that: The frame (1) is provided with a heat exchange box (8) connected to the dust hood (2). The dust filter (3) is connected to the side of the heat exchange box (8) away from the dust hood (2). The heat exchange box (8) is provided with a heat exchange coil (81). The heat exchange coil (81) is distributed in a serpentine pattern. Both ends of the heat exchange coil (81) are connected to an external water supply circulation system.

8. A dust removal device for an electric arc furnace according to claim 1, characterized in that: The dust hood (2) is provided with an air guide plate (25), which is distributed in a vertical direction. The air guide plate (25) consists of several pieces that are parallel to each other and spaced apart.

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