Energy-saving device for cutting, dust removal and smoke exhaust of continuous casting slab

Abstract

The utility model discloses a continuous casting slab cutting dust removal smoke exhaust energy -conserving device, including continuous casting system and flame cutting machine, and the both sides of continuous casting system are equipped with smoke dust absorption pipeline respectively, and every smoke dust absorption pipeline one end respectively has dust removal fan that communicates, and every smoke dust absorption pipeline outer wall respectively has the dust absorption subassembly that cooperates with dust removal fan, and the smoke dust absorption pipeline is equipped with the smoke flow direction baffle that cooperates with dust absorption subassembly. The continuous casting slab cutting dust removal smoke exhaust energy -conserving device provided by the utility model solves the problem of the existing technology, and the overall smoke dust system discharge is not up to standard, and the problem of large fan energy consumption.

Description

Technical Field

[0001] This utility model belongs to the technical field of dust removal and smoke exhaust systems for continuous casting of steel, specifically relating to a dust removal and smoke exhaust energy-saving device for continuous casting slab cutting. Background Technology

[0002] The dust emission process for continuous casting slab cutting begins with the dust generated by the continuous casting slab cutting line. The entire cutting line has an open layout, and the dust generated by the cutting line can only be absorbed through dedicated dust absorption pipes on both sides of the cutting line. The dust is then adsorbed by the negative pressure generated by the dust removal fan and flows into the main flue of the purification system. After purification, it is discharged into the atmosphere (the overall dust removal and exhaust system is as follows). Figure 1 (As shown).

[0003] In this dust collection and smoke extraction process, key control points for the overall dust collection and smoke extraction effect include the magnitude of the negative pressure at the inlet of the dust collector fan, the resistance of the dust absorption pipeline, and the layout of the dust suction ports on the dust absorption pipeline and whether the inlet negative pressure is balanced. However, in actual design and application, the design of these points relies on experience-based judgment, simply increasing the pressure of the dust collector fan to maintain system operation. The problem of uneven negative pressure at the dust suction ports, and the more severe the negative pressure attenuation the further the dust suction port is from the dust collector fan inlet, is not taken seriously. The increased pressure has little actual effect and instead increases fan energy consumption by more than 30%. Although this approach can maintain basic system operation, the actual dust collection and smoke extraction effect is poor, not only causing substandard dust emissions at the work site, affecting worker health, but also increasing the energy burden of the dust collection and smoke extraction system, which contradicts the current advocacy of energy conservation and consumption reduction.

[0004] Therefore, it is necessary to upgrade the existing dust collection and exhaust system for continuous casting slab cutting to optimize the overall dust absorption pipeline, thereby ensuring that dust emissions meet standards while effectively reducing system energy consumption and promoting the green and sustainable development of the steel industry. Utility Model Content

[0005] The purpose of this utility model is to provide an energy-saving device for dust removal and smoke exhaust during continuous casting slab cutting, which solves the problems of substandard emissions from the overall dust system and high energy consumption of the fan in the existing process.

[0006] The technical solution adopted by this utility model is a continuous casting slab cutting dust removal and smoke exhaust energy-saving device, including a continuous casting system and a flame cutting machine. Dust absorption pipes are provided on both sides of the continuous casting system. Each dust absorption pipe is connected to a dust removal fan at one end. Each dust absorption pipe has a dust collection component connected to the outer wall of the outer wall to cooperate with the dust removal fan. A flue gas flow direction baffle is provided inside the dust absorption pipe to cooperate with the dust collection component.

[0007] The features of this utility model also include: Each set of flue gas flow direction baffles consists of two baffles, both of which are inclined. One end of each baffle is connected to the inner wall of the dust absorption pipe on the side where the dust collection component is located. The dust collection component is located between the two baffles, and the two baffles are inclined towards each other.

[0008] One of the flue gas flow direction partitions is connected to the upper and lower sides of the inner wall of the dust absorption pipe at both ends, and passes through the dust absorption pipe at an angle; the other flue gas flow direction partition is connected to the inner wall of the dust absorption pipe on the side where the dust collection component is installed at one end, and the other end is located in the middle of the dust absorption pipe. The adjacent ends of the two flue gas flow direction partitions do not overlap in the vertical plane.

[0009] The vacuuming assembly includes several novel adjustable vacuum ports, each of which includes a flared vacuum port ring. The port of the flared vacuum port ring near the smoke inlet is fluid-shaped, and an adjustable baffle is movably inserted through the middle of the flared vacuum port ring.

[0010] The adjustable baffle size is larger than the size of the suction port ring at the horn opening.

[0011] The new type has 8 to 10 adjustable suction ports.

[0012] A flame cutting gun track is installed vertically above the smoke and dust absorption pipe, and the flame cutting machine is installed inside the flame cutting gun track.

[0013] The dust collection component is located on the inner side of the fume absorption pipeline near the continuous casting system and is designed to work in conjunction with the flame cutting machine.

[0014] The beneficial effects of this utility model are: This utility model relates to a dust removal and fume extraction energy-saving device for continuous casting slab cutting. It requires no changes to existing processes and equipment. Simply adding two relatively inclined flue gas flow direction baffles to the existing dust absorption pipeline and using a new type of adjustable suction port changes the arrangement of the suction ports from a sequential order based on their distance from the dust collector inlet to a progressively decreasing arrangement from the center to both sides. This reduces pressure loss along the path, effectively lowering the pressure requirement of the dust collector and improving its energy consumption while further enhancing dust absorption. The device is simple in structure, requires short modification time, is easy to operate, and effectively improves dust adsorption while reducing overall system energy consumption. Attached Figure Description

[0015] Figure 1 A schematic diagram of the dust emission process during the cutting of a traditional continuous casting slab. Figure 2 This is a schematic diagram of the dust emission process after the modification of the continuous casting slab cutting dust removal and smoke exhaust energy-saving device of this utility model; Figure 3 This utility model Figure 2Schematic diagram of the cross-sectional structure of the middle AA section; Figure 4 This is a top view of the novel adjustable dust suction port structure in the continuous casting slab cutting dust removal and smoke exhaust energy-saving device of this utility model; Figure 5 This utility model Figure 4 Schematic diagram of the cross-sectional structure of the new adjustable dust suction port BB.

[0016] In the diagram, 1. Smoke and dust absorption pipeline, 2. Dust removal fan, 3. Flame cutting machine, 4. Smoke flow direction baffle, 5. New adjustable dust suction port, 5-1. Horn-shaped dust suction port ring, 5-2. Adjustable baffle, 6. Continuous casting system, 7. Flame cutting gun track. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] This utility model relates to a dust removal and smoke extraction energy-saving device for continuous casting slab cutting, such as... Figures 2-3 As shown, it includes a continuous casting system 6 and a flame cutting machine 3. Dust absorption pipes 1 are installed on both sides of the continuous casting system 6, and the two dust absorption pipes 1 are arranged in parallel. One end of each dust absorption pipe 1 is connected to a dust removal fan 2 (e.g., ...). Figure 1 As shown in the figure, the two dust removal fans 2 of this utility model are set on the same end of the two dust absorption pipes 1. The outer wall of each dust absorption pipe 1 is connected to a dust collection component that cooperates with the dust removal fan 2. The dust absorption pipe 1 is provided with a flue gas flow direction baffle 4 that cooperates with the dust collection component.

[0019] Furthermore, each set of flue gas flow direction baffles 4 consists of two baffles, both of which are inclined. One end of each baffle is connected to the inner wall of the dust absorption pipe 1 where the dust collection component is located. The dust collection component is located between the two baffles, and the two baffles are inclined towards each other. The inclination angle and thickness can be adjusted according to the actual situation. like Figure 2 As shown, one flue gas flow direction baffle 4 connects to the upper and lower sides of the inner wall of the dust absorption pipe 1 at both ends, passing through the dust absorption pipe 1 at an angle; the other flue gas flow direction baffle 4 connects to the inner wall of the dust absorption pipe 1 on the side where the dust collection assembly is located at one end, and the other end is located in the middle of the dust absorption pipe 1. The adjacent ends of the two flue gas flow direction baffles 4 do not overlap in the vertical plane. This design ensures that dust is drawn into the dust absorption pipe 1 from the middle of the dust collection assembly. Under the action of the two flue gas flow direction baffles 4, the negative pressure is greatest in the middle of the dust collection assembly (near the flame cutting gun), gradually increasing to both sides, reducing the pressure loss along the path distance, ensuring balanced negative pressure at each dust collection port, and ensuring that each dust collection port effectively adsorbs dust. This ensures the uniformity and sufficiency of dust adsorption.

[0020] The flue gas flow direction baffle 4 in the flue gas absorption pipeline 1 can be adjusted according to the actual working conditions of each slab cutting line to ensure that the suction port with the maximum negative pressure is located near the flame cutting gun. By installing the flue gas flow direction baffle 4 in the flue gas absorption pipeline 1, the airflow direction in the flue gas absorption pipeline is adjusted. The traditional dust suction port is arranged in a single sequence according to the distance from the dust removal fan inlet. Instead, the flue gas enters from the middle, and the negative pressure decreases towards both sides, reducing the pressure loss along the path distance.

[0021] Furthermore, the vacuuming assembly includes several novel adjustable vacuum ports 5, with the number of novel adjustable vacuum ports 5 being 8 to 10. For example... Figure 4 As shown, each of the new adjustable suction ports 5 includes a funnel-shaped suction port ring 5-1. The port of the funnel-shaped suction port ring 5-1 near the smoke inlet is fluid-shaped, and an adjustable baffle 5-2 is movably inserted through the middle of the funnel-shaped suction port ring 5-1. The adjustable baffle 5-2 can adjust the opening of the suction port and adjust the negative pressure of each suction port according to the actual situation.

[0022] Among them, such as Figure 5 As shown, the adjustable baffle 5-2 is larger than the suction port ring 5-1. During use, the size of the vent can be adjusted by manually pulling the adjustable baffle 5-2. This design employs a novel adjustable suction port 5 to balance the negative pressure at each suction port. Ultimately, each suction port is positioned with a corresponding negative pressure precisely facing the emitted smoke and dust, ensuring a balance between smoke and dust generation and emission, improving smoke and dust adsorption efficiency, and reducing overall system energy consumption.

[0023] Furthermore, a flame cutting gun track 7 perpendicular to the smoke and dust absorption pipe 1 is provided above it, and the flame cutting machine 3 is installed inside the flame cutting gun track 7.

[0024] Furthermore, the dust collection component is installed on the inner side of the dust absorption pipe 1 near the continuous casting system 6, and is configured in conjunction with the flame cutting machine 3.

[0025] Traditional dust removal and smoke extraction devices, such as Figures 1-2 As shown, the fumes from cutting the continuously cast slab are generated at the flame cutting torch. Some of the fumes flow along the underside of the slab, freely dispersing from the edge into the surrounding environment. Another portion of the fumes diffuses freely above the slab, flowing into the surrounding environment. All fumes are absorbed only through dedicated fume absorption pipes on both sides of the continuous casting slab cutting line. The fume absorption is achieved through the negative pressure generated by the dust collector fan, which draws in the fumes through each suction port. Theoretically, the closer the suction port is to the inlet of the dust collector fan, the greater the negative pressure and the better the fume absorption effect. The higher the pressure of the dust collector fan, the better the fume absorption effect. The fumes from the dust collector fan outlet flow into the main flue of the purification system, where they are purified and then discharged into the atmosphere.

[0026] In actual design and application, when the dust absorption effect is not ideal, the system is simply maintained by increasing the pressure of the dust removal fan. However, the problem of uneven negative pressure at the dust suction port and the more serious the negative pressure attenuation the further the dust suction port is from the dust removal fan inlet is not taken seriously. The increased pressure has no obvious effect and instead increases the fan energy consumption, with an actual increase of more than 30%.

[0027] The working principle of this dust removal and smoke exhaust energy-saving device is as follows: In the flue gas absorption duct 1, the flue gas flow direction is adjusted by the baffle plate 4. The original main suction port, located closest to the dust collector inlet, is now positioned near the flame cutting track. The suction port with the highest negative pressure is placed at the location of the highest flue gas volume, thus improving the flue gas absorption effect. Simultaneously, the flue gas flow direction is adjusted by the baffle plate 4. The original sequential arrangement of suction ports based on their distance from the dust collector inlet is changed to a progressively decreasing arrangement from the center to both sides. This reduces pressure loss over the path distance, effectively lowering the pressure requirement of the dust collector fan and reducing its energy consumption while further improving the flue gas absorption effect.

[0028] The new adjustable suction port 5 features a funnel-shaped suction port ring 5-1 with a streamlined design that effectively reduces suction port resistance. The adjustable baffle 5-2 allows for adjustment of the suction port opening according to actual conditions, regulating the negative pressure at each suction port and improving the flexibility of equipment modification.

[0029] This invention has significant practical value in the field of steel continuous casting cutting. It precisely adjusts the absorption effect of cutting fumes, reduces the air pressure of the dust removal fan, reduces energy consumption, requires minimal construction work, and is simple and easy to operate, providing a new method for upgrading and transforming steel continuous casting cutting systems.

[0030] Example 1 This utility model relates to a dust removal and smoke extraction energy-saving device for continuous casting slab cutting, such as... Figures 2-3 As shown, the system includes a continuous casting system 6 and a flame cutting machine 3. The continuous casting system 6 is provided with two dust absorption pipes 1 on both sides. The two dust absorption pipes 1 are arranged in parallel. One end of each dust absorption pipe 1 is connected to a dust removal fan 2 (as shown in the figure, the two dust removal fans 2 are set on the same end of the two dust absorption pipes 1). The outer wall of each dust absorption pipe 1 is connected to a dust collection component that cooperates with the dust removal fan 2. The dust absorption pipe 1 is provided with a flue gas flow direction baffle 4 that cooperates with the dust collection component.

[0031] Example 2 Based on the structure of Embodiment 1, the continuous casting slab cutting dust removal and smoke exhaust energy-saving device further includes two flue gas flow direction baffles 4 in each group. Both flue gas flow direction baffles 4 are inclined. One end of each flue gas flow direction baffle 4 is connected to the inner wall of the dust absorption pipe 1 on the side where the dust collection component is installed. The dust collection component is installed between the two flue gas flow direction baffles 4. The two flue gas flow direction baffles 4 are inclined towards each other at an angle of 45°. like Figure 2 As shown, one flue gas flow direction baffle 4 connects to the upper and lower sides of the inner wall of the dust absorption pipe 1 at both ends, passing through the dust absorption pipe 1 at an angle; the other flue gas flow direction baffle 4 connects to the inner wall of the dust absorption pipe 1 on the side where the dust collection assembly is located at one end, and the other end is located in the middle of the dust absorption pipe 1. The adjacent ends of the two flue gas flow direction baffles 4 do not overlap in the vertical plane. This design ensures that dust is drawn into the dust absorption pipe 1 from the middle of the dust collection assembly. Under the action of the two flue gas flow direction baffles 4, the negative pressure is greatest in the middle of the dust collection assembly (near the flame cutting gun), gradually increasing to both sides, reducing the pressure loss along the path distance, ensuring balanced negative pressure at each dust collection port, and ensuring that each dust collection port effectively adsorbs dust. This ensures the uniformity and sufficiency of dust adsorption.

[0032] The flue gas flow direction baffle 4 in the flue gas absorption pipeline 1 can be adjusted according to the actual working conditions of each slab cutting line to ensure that the suction port with the maximum negative pressure is located near the flame cutting gun. By installing the flue gas flow direction baffle 4 in the flue gas absorption pipeline 1, the airflow direction in the flue gas absorption pipeline is adjusted. The traditional dust suction port is arranged in a single sequence according to the distance from the dust removal fan inlet. Instead, the flue gas enters from the middle, and the negative pressure decreases towards both sides, reducing the pressure loss along the path distance.

[0033] Example 3 Based on the structure of Embodiment 1, the dust removal and smoke exhaust energy-saving device for continuous casting slab cutting in this embodiment further includes a number of novel adjustable dust suction ports 5, with a quantity of 8 to 10. For example... Figure 4 As shown, each of the new adjustable suction ports 5 includes a funnel-shaped suction port ring 5-1. The port of the funnel-shaped suction port ring 5-1 near the smoke inlet is fluid-shaped, and an adjustable baffle 5-2 is movably inserted through the middle of the funnel-shaped suction port ring 5-1. The adjustable baffle 5-2 can adjust the opening of the suction port and adjust the negative pressure of each suction port according to the actual situation.

[0034] Among them, such as Figure 5As shown, the adjustable baffle 5-2 is larger than the suction port ring 5-1. During use, the size of the vent can be adjusted by manually pulling the adjustable baffle 5-2. This design employs a novel adjustable suction port 5 to balance the negative pressure at each suction port. Ultimately, each suction port is positioned with a corresponding negative pressure precisely facing the emitted smoke and dust, ensuring a balance between smoke and dust generation and emission, improving smoke and dust adsorption efficiency, and reducing overall system energy consumption.

[0035] Example 4 Based on the structure of Embodiment 1, the continuous casting slab cutting dust removal and smoke exhaust energy-saving device in this embodiment further includes a flame cutting gun track 7 perpendicular to the dust absorption pipe 1, and the flame cutting machine 3 is installed inside the flame cutting gun track 7.

[0036] Example 5 Based on the structure of Embodiment 1, the dust removal and smoke exhaust energy-saving device for continuous casting slab cutting in this embodiment further includes a dust collection component installed on the inner side of the smoke absorption pipeline 1 near the continuous casting system 6, and configured in conjunction with the flame cutting machine 3.

[0037] Example 6 The dust removal and smoke extraction energy-saving device in this embodiment works as follows: When the flame cutting machine 3 is working, the smoke and dust generated are drawn into the corresponding smoke absorption pipe 1 through the new adjustable suction port 5 closest to the center. The suction port with the maximum negative pressure is placed at the position with the largest amount of smoke and dust, thereby improving the smoke and dust absorption effect. At the same time, under the obstruction of the two smoke flow direction baffles 4, the smoke in the smoke absorption pipe 1 flows towards the baffles 4, changing the original single-order arrangement of the suction ports according to their distance from the dust collector fan inlet to a step-by-step decrease from the center to both sides. This reduces the pressure loss along the path distance, effectively reducing the pressure demand of the dust collector fan, reducing the energy consumption of the dust collector fan, and further improving the smoke and dust absorption effect.

[0038] The new adjustable suction port 5 features a funnel-shaped suction port ring 5-1 with a streamlined design that effectively reduces suction port resistance. The adjustable baffle 5-2 can be manually pulled to adjust the suction port opening according to actual conditions, thereby adjusting the negative pressure at each suction port and improving the flexibility of equipment modification.

Claims

1. A dust removal and fume extraction energy-saving device for continuous casting slab cutting, characterized in that, The system includes a continuous casting system (6) and a flame cutting machine (3). The continuous casting system (6) is provided with dust absorption pipes (1) on both sides. Each dust absorption pipe (1) is connected to a dust removal fan (2) at one end. Each dust absorption pipe (1) is connected to a dust collection component that cooperates with the dust removal fan (2) on its outer wall. The dust absorption pipe (1) is provided with a flue gas flow direction baffle (4) that cooperates with the dust collection component.

2. The energy-saving device for dust removal and fume extraction during continuous casting slab cutting according to claim 1, characterized in that, The number of flue gas flow direction baffles (4) in each group is two. Both flue gas flow direction baffles (4) are inclined. One end of each flue gas flow direction baffle (4) is connected to the inner wall of the side where the dust collection component is set in the dust absorption pipe (1). The dust collection component is set between the two flue gas flow direction baffles (4). The two flue gas flow direction baffles (4) are inclined towards each other.

3. The energy-saving device for dust removal and fume extraction during continuous casting slab cutting according to claim 2, characterized in that, One of the flue gas flow direction partitions (4) is connected to the upper side and the lower side of the inner wall of the dust absorption pipe (1) respectively, and passes through the dust absorption pipe (1) at an incline; the other flue gas flow direction partition (4) is connected to the inner wall of the dust absorption pipe (1) on the side where the dust collection component is set, and the other end is located in the middle of the dust absorption pipe (1). The two flue gas flow direction partitions (4) have no overlap at their adjacent ends in the vertical plane.

4. The energy-saving device for dust removal and fume extraction during continuous casting slab cutting according to claim 1, characterized in that, The dust collection assembly includes several novel adjustable dust collection ports (5), each of the novel adjustable dust collection ports (5) includes a flared dust collection port ring (5-1), the port of the flared dust collection port ring (5-1) near the end where the smoke enters is fluid-shaped, and an adjustable baffle (5-2) is movably passed through the middle of the flared dust collection port ring (5-1).

5. The energy-saving device for dust removal and fume extraction during continuous casting slab cutting according to claim 4, characterized in that, The adjustable baffle (5-2) is larger than the size of the horn-shaped dust suction port ring (5-1).

6. The energy-saving device for dust removal and fume extraction during continuous casting slab cutting according to claim 4, characterized in that, The number of the new adjustable suction ports (5) is 8 to 10.

7. The energy-saving device for dust removal and fume extraction during continuous casting slab cutting according to claim 1, characterized in that, The smoke absorption pipe (1) is provided with a flame cutting gun track (7) perpendicular to it, and the flame cutting machine (3) is set in the flame cutting gun track (7).

8. The energy-saving device for dust removal and fume extraction during continuous casting slab cutting according to claim 7, characterized in that, The dust collection component is located on the inner side of the dust absorption pipeline (1) near the continuous casting system (6) and is configured in conjunction with the flame cutting machine (3).

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