Tapping dust removal cover for large electric furnace

Abstract

The utility model relates to the technical field of electric furnace tapping dust removal devices, in particular to a large electric furnace tapping dust removal cover which comprises a side plate and a back plate which are perpendicular to each other and fixedly connected, and the side plate and the back plate are provided with fixing foot rods and connected with a top plate. The top plate, the side plate and the back plate are vertically arranged and fixedly connected, and the side plate, the back plate and the top plate enclose to form a dust removal cavity. The side plates, the back plate and the top plate define the dust removal cavity, the fixed foot rods serve as supports, and the dust removal covers are symmetrically arranged on the two sides of the casting ladle, so that waste gas can be effectively gathered and recycled through the dust removal system. The device is simple and stable in structure, low in manufacturing cost, capable of improving the electric furnace tapping waste gas treatment efficiency and suitable for large electric furnace tapping scenes.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal devices for electric furnace tapping, and specifically to a large electric furnace tapping dust removal hood. Background Technology

[0002] The tapping process of an electric furnace generates waste gas, which requires dust removal equipment to treat. Adding a dust hood to the air inlet of the dust removal equipment can improve the waste gas recovery efficiency. However, even with only a dust hood at the air inlet, some waste gas still cannot be recovered, so additional dust hoods are needed.

[0003] For example, Chinese patent publication number CN 111059899 A discloses an electric furnace charging dust removal system and method, which includes a dust removal hood, an additional dust removal hood for the dust removal equipment, which can improve the efficiency of waste gas recovery. However, the overall structure is large, and the waste gas recovery efficiency is insufficient in the iron tapping scenario of a large electric furnace, and it is not suitable for the scenario where the crane runs above the dust removal hood. Utility Model Content

[0004] To address the issues that current dust collection equipment has a large overall structure, insufficient waste gas recovery efficiency in large electric furnace tapping scenarios, and is not suitable for overhead cranes to run above the dust collection hood, this utility model proposes a dust collection hood with a simpler structure that can be directly installed at the air inlet of the dust collection equipment. This design is low in cost and can improve waste gas recovery efficiency.

[0005] To achieve the above-mentioned technical effects, this utility model proposes:

[0006] A dust removal hood for tapping iron in a large electric furnace includes side plates and a back plate that are perpendicularly arranged and fixedly connected to each other. Both the side plates and the back plate are provided with fixed legs. Both the side plates and the back plate are connected to a top plate. The top plate is perpendicularly arranged and fixedly connected to the side plates and the back plate. The side plates, the back plate and the top plate surround each other to form a dust removal chamber.

[0007] The side plates, back plate, and top plate form a dust collection chamber, with fixed legs for support. Dust hoods are symmetrically arranged on both sides of the ladle, which can effectively collect waste gas and recover it through the dust collection system. In this utility model, the dust hood shells can be arranged in pairs opposite each other, with two dust collection chambers surrounding the electric furnace and ladle, which can efficiently recover and treat the waste gas generated during the tapping process.

[0008] The side plate has a dust removal pipe hole, which is set according to the outer diameter of the dust removal pipe. The air inlet of the dust removal pipe of the dust removal equipment passes through the dust removal pipe hole, and the air inlet of the dust removal pipe is located on one side of the dust removal chamber.

[0009] The dust removal pipe holes are designed to be circular or semi-circular and spliced ​​with elongated strips. Horizontal pipes or vertical pipes with bends can be inserted through the dust removal pipe holes.

[0010] The back plate includes an upper back plate and a lower back plate, the upper back plate and the lower back plate are fixedly connected, and the upper back plate is also fixedly connected to the top plate. The width of the lower back plate is smaller than the width of the upper back plate. The structural features of the upper and lower back plates allow for the formation of a passage between the two symmetrically arranged dust removal chambers, facilitating the passage of the crane and the pouring ladle.

[0011] The back panel also includes a reinforcing plate, which is a right-angled triangle and is fixedly connected to both the upper and lower back panels. The reinforcing plate makes the connection between the upper and lower back panels more stable.

[0012] The top plate has a front baffle, which is perpendicularly arranged and fixedly connected to the top plate and the side plate, and is arranged opposite to the back plate. The front baffle is relatively short, which enhances the connection strength between the top plate and the side plate, making the dust collection chamber structure more complete.

[0013] Support beams are provided at the edges of the side panels, the back panel, and the top panel, or at the connections between them. These support beams can extend to form the fixed support legs. The support beams are located at the connections between the components to improve the overall strength of the dust collector hood.

[0014] The top plate, located on one side of the dust collection chamber, is equipped with a dust collection pipe connecting rod, and the side plate, opposite to the dust collection chamber, is connected to a reinforcing rod. The connecting rod connects the dust collection hood and the dust collection pipe, improving the stability of the dust collection hood. The reinforcing rod further enhances the stability of the dust collection hood.

[0015] It also includes a front panel, which is fixedly connected to the side panel and located on the side opposite to the back panel.

[0016] The side plates, back plates, and top plates are all equipped with reinforcing ribs, and these ribs are located on one side of the dust removal chamber. The reinforcing ribs improve the strength and stability of the dust removal hood.

[0017] The beneficial effects of this utility model are:

[0018] With a simple and stable structure and low cost, it improves the efficiency of treating exhaust gas from electric furnace tapping and is suitable for large-scale electric furnace tapping scenarios. Attached Figure Description

[0019] Figure 1 A schematic diagram of the first overall structure of the dust removal hood for tapping iron in a large electric furnace.

[0020] Figure 2 A schematic diagram of the second structure of the dust removal hood for tapping iron in a large electric furnace.

[0021] Figure 3 The image shows the right view and cross-sectional view AA of the dust removal hood for tapping iron in a large electric furnace.

[0022] Figure 4 This is a schematic diagram of the side plate structure in Embodiment 1.

[0023] Figure 5 This is a schematic diagram of the backplate structure in Example 1.

[0024] Figure 6 This is a schematic diagram of the side plate structure in Embodiment 2.

[0025] Figure 7 This is a schematic diagram of the backplate structure in Example 2.

[0026] Icon labels:

[0027] 100. Side panel; 200. Back panel; 300. Top panel; 400. Fixed support rod; 500. Dust collection chamber; 600. Front panel; 700. Crane;

[0028] 101. Dust removal pipe hole; 102. Bearing beam; 103. Connecting rod; 104. Reinforcing rib; 201. Upper back plate; 202. Lower back plate; 203. Reinforcing plate; 301. Front baffle; 302. Reinforcing rod; 701. Ladle; 702. Operating platform; 703. Electric furnace. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0030] This utility model provides a dust removal hood for tapping iron in a large electric furnace. The preferred embodiments of the dust removal hood for tapping iron in a large electric furnace are described below.

[0031] Example 1

[0032] Reference Appendix Figures 1 to 3 In this embodiment, the large electric furnace tapping dust hood includes a side plate 100, a back plate 200, and a top plate 300. The side plate 100, back plate 200, and top plate 300 are all vertically and fixedly connected in pairs, forming a dust collection chamber 500. The dust collection pipes of the dust collection equipment pass through the dust collection pipe holes 101 of the side plate 100, and the air inlet is placed inside the dust collection chamber 500. Both the side plate 100 and the back plate 200 are equipped with fixed legs 400, which are fixedly connected to the ground or other equipment to improve the stability of the dust hood. The side plate 100 and the back plate 200 are vertically and fixedly connected by welding, forming an L-shaped foundation support structure.

[0033] Reference Appendix Figure 4The dust removal pipe hole 101 is opened according to the outer diameter of the horizontal pipe of the dust removal pipe.

[0034] Reference Appendix Figure 5 The back plate 200 includes an upper back plate 201 and a lower back plate 202. The width of the upper back plate 201 is greater than the width of the lower back plate 202, and the upper back plate 201 is fixedly connected to the top plate 300. The lower back plate 202 is fixedly connected to the lower part of the back plate 200. The upper back plate 201 and the lower back plate 202 are welded together, and the upper back plate 201 is also welded to the top plate 300. Because the hook width of the crane 700 is relatively small after the crane 700 lifts the ladle 701, and the width of the ladle 701 is greater than the width of the crane 700, an unequal spacing is required when the crane 700 enters the dust removal chamber 500 during operation. Therefore, the width of the upper back plate 201 is set to be greater than the width of the lower back plate 202. The length of the lower back plate 202 is greater than the length of the upper back plate 201.

[0035] At the connection between the upper back panel 201 and the lower back panel 202, a reinforcing plate 203 is connected to the side away from the side panel 100. The reinforcing plate 203 is a right triangle, and its two right-angled sides are fixedly connected to the upper back panel 201 and the lower back panel 202 respectively.

[0036] A front baffle 301 is fixedly connected to the side of the top plate 300 opposite to the back plate 200. The front baffle 301 is shorter in length and has the same width as the top plate 300. The front baffle 301 is welded to both the top plate 300 and the side plate 100. The fixed connection between the front baffle 301 and the side plate 100 improves the integrity of the dust collection chamber 500 and enhances the overall strength of the dust collection hood. The front baffle 301 is perpendicular to both the top plate 300 and the side plate 100. The front baffle 301 and the dust collection chamber 500 form a semi-enclosed structure to prevent flue gas from escaping.

[0037] Bearing beams 102 are provided at the edges of the side panels 100, back panels 200, and top panels 300, or at the joints where they connect. These bearing beams 102 enhance the overall strength of the dust collector hood. The bearing beams 102 located at the joint between the back panel 200 and the side panels 100 extend downwards to form fixed support rods 400. The bearing beams 102 at the edges of the side panels 100, back panels 200, and top panels 300 are all square steel pipes, as is the fixed support rod 400. Furthermore, the aperture of the bearing beams 102 at the edges is smaller than the aperture of the fixed support rod 400.

[0038] Reinforcing ribs 104 are provided on the side panels 100, back panels 200, and top panels 300 on one side of the dust removal chamber 500. The reinforcing ribs 104 are arranged horizontally and vertically to form a grid on the panel surface. The reinforcing ribs 104 improve the overall strength of the dust removal hood and enhance its resistance to high-temperature deformation.

[0039] This embodiment is one way to install a dust collection hood. Please refer to the appendix for further details. Figures 1 to 5A load-bearing beam 102 at the edge of the side plate 100 away from the back plate 200 extends downward to form a fixed foot rod 400, which is fixedly connected to the operating platform 702. The load-bearing beam 102 at the edge where the side plate 100 connects to the back plate 200 extends downward to form the fixed foot rod 400 and is fixedly connected to the bottom surface. The bottom edge of the side plate 100 is close to the table surface of the operating platform 702. A horizontal pipe of the dust removal duct passes through the dust removal duct hole 101 of the side plate 100, and elbows and vertical pipes are located on the side opposite to the dust removal chamber 500. A dust removal duct baffle is also provided inside the dust removal chamber 500. The baffle flange is connected to the air inlet of the dust removal duct and is connected to the top plate 300 via a connecting rod 103 to improve overall strength. A reinforcing rod 302 is provided on the side of the side plate 100 opposite to the dust removal chamber 500 to improve overall strength.

[0040] In this embodiment, the side plate 100, back plate 200, and top plate 300 are mainly made of steel plate. Fixed support rods 400 are welded to the two long sides of the side plate 100. The front and rear fixed support rods 400 are fixedly connected to the operating platform 702 and the bottom surface by screws. A load-bearing beam 102 is welded to the top edge of the side plate 100. Reinforcing ribs 104, which are angle steel, are welded to the side of the side plate 100 located in the dust removal chamber 500. The reinforcing ribs 104 are arranged in a grid pattern. A dust removal pipe hole 101 is opened near the top of the side plate 100, and the dust removal pipe hole 101 corresponds to the outer diameter of the horizontal dust removal pipe. No reinforcing ribs 104 are provided at the dust removal pipe hole 101. A load-bearing beam 102 is welded to the two wide sides and one long side of the top plate 300. The long side of the unwelded load-bearing beam 102 is welded to the top load-bearing beam 102 of the side plate 100. The long side of the top plate 300 is equal in length to the wide side of the side plate 100. A reinforcing rib 104 is welded to one side of the dust removal chamber 500 on the top plate 300, and the reinforcing rib 104 is arranged in a grid pattern. The back plate 200 is divided into an upper back plate 201 and a lower back plate 202. A load-bearing beam 102 is welded to one wide side and one long side of the upper back plate 201. The wide side of the upper back plate 201 is equal in length to the wide side of the top plate 300. The wide side of the unwelded load-bearing beam 102 is welded to the corresponding wide side of the top plate 300, and the long side of the unwelded load-bearing beam 102 is welded to the corresponding long side of the side plate 100. A load-bearing beam 102 is welded to one long side and one wide side of the lower back plate 202. The wide side of the unwelded load-bearing beam 102 is welded to the wide side of the upper back plate 201, and the long side of the unwelded load-bearing beam 102 is welded to the corresponding long side of the side plate 100. The length of the right-angled side of the reinforcing plate 203 is equal to the difference in length between the wide side of the upper back plate 201 and the wide side of the lower back plate 202. A load-bearing beam 102 is welded to the long side of the reinforcing plate 203, and the two right-angled sides are welded to the wide side of the upper back plate 201 and the long side of the lower back plate 202, respectively. A front baffle 301 is connected to the wide side of the top plate 300 away from the back plate 200. The front baffle 301 is not connected to the load-bearing beam 102. The long side of the front baffle 301 is equal in length to the wide side of the top plate 300, and the long side of the front baffle 301 connects to the wide side of the top plate 300 and the long side of the side plate 100. Two connecting rods 103 are welded to the side of the top plate 300 located in the dust removal chamber 500. The two connecting rods 103 are parallel and spaced apart by the length of the baffle. Two connecting rods 103 are square in shape and welded to the supporting beam 102 of the top plate 300. The two connecting rods 103 are also welded to the upper surface of the baffle. A reinforcing rod 302, composed of welded square steel tubing, is connected to the side plate 100 opposite to the dust removal chamber 500. The vertical portion of the reinforcing rod 302 is fixed to the operating platform 702 with screws. Two square steel tubing, arranged horizontally and obliquely respectively, are connected to the top of the vertical portion and welded to the side plate 100.

[0041] Example 2

[0042] Reference Appendix Figures 1 to 3 In this embodiment, the large electric furnace tapping dust hood includes a side plate 100 and a back plate 200 that are perpendicularly arranged and fixedly connected to each other. Both the side plate 100 and the back plate 200 are provided with fixed legs 400. Both the side plate 100 and the back plate 200 are connected to a top plate 300. The top plate 300 is perpendicularly arranged and fixedly connected to the side plate 100 and the back plate 200. The side plate 100, the back plate 200 and the top plate 300 surround each other to form a dust removal chamber 500.

[0043] The side plate 100 and the back plate 200 are vertically fixedly connected by welding to form an L-shaped foundation support structure. The top plate 300 is welded to both the back plate 200 and the side plate 100.

[0044] In this embodiment, the top plate 300 extends to both sides of the side plate 100, and the back plate 200 extends to both sides of the side plate 100, thus forming dust removal chambers 500 on both sides of the side plate 100. A front plate 600 is also connected to the side plate 100, located on the opposite side of the back plate 200 and fixedly connected to the edge of the side plate 100. Supporting beams 102 are provided at the edges of the side plate 100, back plate 200, and top plate 300, or at their connections. These supporting beams 102 can extend to form fixed support rods 400. A supporting beam 102 is also provided at the connection between the front plate 600 and the side plate 100. Supporting beams 102 are provided at both vertical edges of the front plate 600, extending downwards to form two fixed support rods 400 and fixedly connected to the operating platform 702.

[0045] Reference Appendix Figure 6 The side plate 100 has a dust removal pipe hole 101, which is set according to the outer diameter of the dust removal pipe. In this embodiment, the dust removal pipe hole 101 is set as a combination of a semi-circular and a long strip shape. The vertical pipe and tee of the dust removal pipe are embedded in the dust removal pipe hole 101 of the side plate 100. The two air inlets extending from the tee of the dust removal pipe are respectively located in the dust removal chambers 500 on both sides of the side plate 100.

[0046] Reference Appendix Figure 7 The back panel 200 includes an upper back panel 201 and a lower back panel 202, which are fixedly connected. The upper back panel 201 is also fixedly connected to the top panel 300. The width of the lower back panel 202 is smaller than the width of the upper back panel 201. The upper back panel 201 and the lower back panel 202 are welded together. The back panel 200 also includes a reinforcing plate 203, which is a right-angled triangle and is fixedly connected to both the upper back panel 201 and the lower back panel 202.

[0047] In this embodiment, the back panel 200 includes a main body located in the middle and an upper back panel 201, a lower back panel 202, and a reinforcing plate 203 located on both sides. The side panels 100 are fixedly connected to the centerline of the wide side of the main body of the back panel 200. Bearing beams 102 are provided at the connection points between the main body of the back panel 200 and the upper and lower back panels 201 and 202, respectively. The two bearing beams 102 extend downwards to form fixed support rods 400, which are fixedly connected to the ground. This arrangement increases the overall area and strength of the back panel 200. The length of the upper and lower back panels 201 after connection is equal to the length of the main body of the back panel 200.

[0048] The top plate 300 has a front baffle 301, which is perpendicularly arranged and fixedly connected to the top plate 300 and the side plate 100, and is arranged opposite to the back plate 200. The front baffle 301 is connected to the front plate 600 and is located on the side of the front plate 600 away from the side plate 100. The front baffle 301 and the dust collection chamber 500 form a semi-enclosed structure to prevent flue gas from overflowing.

[0049] A dust collection duct connecting rod 103 is provided on one side of the top plate 300, located in the dust collection chamber 500. The side plate 100, back plate 200, and top plate 300 are all equipped with reinforcing ribs 104, which are located on one side of the dust collection chamber 500 to improve resistance to high-temperature deformation. A dust collection duct baffle is also installed inside the dust collection chamber 500. The baffle flange is connected to the air inlet of the dust collection duct and is connected to the top plate 300 via the connecting rod 103, improving overall strength. A reinforcing rod 302 is provided on the side of the side plate 100 opposite to the dust collection chamber 500 to further enhance overall strength.

[0050] Reference Appendix Figures 1 to 36 and 7, two fixed foot rods 400 are welded to the two long sides of the front plate 600, and the fixed foot rods 400 are fixed to the operating platform 702 by screws. The two wide sides are welded to the load-bearing beams 102, and a reinforcing rib 104 is provided on one side of the dust removal chamber 500. The side plate 100 is welded with load-bearing beams 102 around its perimeter, and has a dust removal pipe hole 101 with a semi-circular bottom edge and an overall elongated shape extending to one wide side. The dust removal pipe is fitted into the dust removal pipe hole 101. A reinforcing rib 104 is welded to one side of the side plate 100. The long side of the side plate 100 is equal in length to the long side of the front plate 600, and one long side of the side plate 100 is welded to the center line of the two wide sides of the front plate 600. The top plate 300 is divided into three parts, and the three parts have equal long sides and equal wide sides. The three top plates 300 are spliced ​​together along their long sides in pairs, and the load-bearing beams 102 are welded around the perimeter of the top plates 300 on both sides. The top plate 300, located in the middle, has its two wide sides welded to the centerline of the wide side of the side plate 100. The wide side of the top plate 300, also located in the middle, is welded to the wide side of the front plate 600. The back plate 200 includes a main body, located in the middle. The wide side of the back plate 200 is equal to the wide side of the top plate 300. Fixed feet 400 are welded to its two long sides, and these feet are fixed to the ground with screws. A set of upper back plates 201 and lower back plates 202 are connected to the two long sides of the main body of the back plate 200, following the connection method of the upper back plates 201 and lower back plates 202 in Embodiment 1. The sum of the long side dimensions of the upper back plates 201 and lower back plates 202 is equal to the long side dimension of the main body of the back plate 200. The dust collector pipe includes a riser and a tee at the top of the riser. Two baffles are connected to the horizontal ends of the tee via flanges. The connection method of the connecting rod 103 is as described in Embodiment 1. The connection method of the front baffle 301 is as described in Embodiment 1.

[0051] Example 3

[0052] This embodiment combines the dust collection hoods from the two embodiments described above. (See attached document.) Figures 1 to 3 This embodiment contains five dust collection hoods. The dust collection hoods at the beginning and end are those with the structure described in Embodiment 1, while the three dust collection hoods in the middle are those with the structure described in Embodiment 2. This embodiment also includes a traveling crane 700, a ladle 701, and an electric furnace 703. In this embodiment, a traveling crane 700 running distance is provided between each pair of dust collection hoods to allow space for the operation of the traveling crane 700 and the ladle 701. An electric furnace 703 is installed on the operating platform 702 between each pair of dust collection hoods.

[0053] The dust collector hoods located at the beginning and end of the structure form a dust collection chamber 500 with side panels 100, back panels 200, and top panels 300. The dust collector hoods located at the beginning and end of the structure are symmetrically arranged.

[0054] The three dust collector hoods located at the beginning and end are arranged at a certain interval. In this embodiment, the spacing between each pair of the five dust collector hoods is the same, and the back plates 200 and top plates 300 of two adjacent dust collector hoods are located on the same plane, ensuring that the two opposing dust collector hoods effectively collect the exhaust gas generated by the electric furnace 703. The dust collection equipment on both sides of each electric furnace 703 works in conjunction with the dust collector hoods to draw the exhaust gas generated by the electric furnace 703 into the exhaust gas treatment system.

[0055] During the tapping operation of a large electric arc furnace, the dust collector hood operates according to the following design principles: When the furnace begins tapping, the power to the dust collector hood must be turned on immediately. Once activated, the dust collector generates a strong suction force, drawing in the waste gas generated during tapping and guiding it into the waste gas treatment system. To further enhance the dust removal effect, a blower is installed above the dust collector hood. When the blower operates, it forms a wall of air that seals the gap between adjacent dust collector hoods, effectively preventing waste gas from escaping into the surrounding environment and ensuring that as much waste gas as possible is drawn into the treatment system. When tapping is complete, the power to the dust collector hood is turned off, and the hood stops working, thus ensuring effective dust removal while rationally controlling energy consumption.

[0056] The above description is a preferred embodiment of the present utility model, used to illustrate the present utility model and its effects. It should be noted that, for those skilled in the art, for the purpose of making foreseeable improvements and modifications without departing from the principles of the present utility model, such improvements and modifications are also within the protection scope of the present utility model.

Claims

1. A large electric furnace tapping dust removal hood, characterized in that, It includes side plates and a back plate that are perpendicularly arranged and fixedly connected to each other. Both the side plates and the back plate are provided with fixed legs. Both the side plates and the back plate are connected to a top plate. The top plate is perpendicularly arranged and fixedly connected to the side plates and the back plate. The side plates, the back plate and the top plate surround to form a dust removal chamber.

2. A large-scale electric furnace tapping dust removal hood according to claim 1, characterized in that, The side plate has a dust removal pipe hole, which is set according to the outer diameter of the dust removal pipe.

3. A large-scale electric furnace tapping dust removal hood according to claim 2, characterized in that, The dust removal pipe holes are designed to be a combination of circular or semi-circular and elongated shapes.

4. A large-scale electric furnace tapping dust removal hood according to claim 1, characterized in that, The back panel includes an upper back panel and a lower back panel, the upper back panel is fixedly connected to the lower back panel, and the upper back panel is fixedly connected to the top panel. The width of the lower back panel is smaller than the width of the upper back panel.

5. A large-scale electric furnace tapping dust removal hood according to claim 4, characterized in that, The back plate also includes a reinforcing plate, which is in the shape of a right triangle and is fixedly connected to both the upper back plate and the lower back plate.

6. A large-scale electric furnace tapping dust removal hood according to claim 1, characterized in that, The top plate has a front baffle, which is perpendicular to and fixedly connected to the top plate and the side plate, and is opposite to the back plate.

7. A large-scale electric furnace tapping dust removal hood according to claim 1, characterized in that, The side plate, the back plate, and the top plate are provided with load-bearing beams at their edges or at their connections, and the load-bearing beams can extend to form the fixed legs.

8. A large-scale electric furnace tapping dust removal hood according to claim 7, characterized in that, The top plate is provided with a dust removal pipe connecting rod on one side of the dust removal chamber, and the side plate is connected with a reinforcing rod on the side opposite to the dust removal chamber.

9. A large-scale electric furnace tapping dust removal hood according to claim 1, characterized in that, It also includes a front panel, which is fixedly connected to the side panel and located on the side opposite to the back panel.

10. A large-scale electric furnace tapping dust removal hood according to any one of claims 1 to 9, characterized in that, The side plate, the back plate, and the top plate are all provided with reinforcing ribs, and the reinforcing ribs are located on one side of the dust removal chamber.

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