Ash removal device for steelmaking multi-layer structure platform

Abstract

The utility model discloses an ash removal device for a steelmaking multi-layer structure platform. The ash removal device comprises an ash removal unit, an ash storage unit, an ash conveying unit and a dust removal unit, the dust removal unit comprises a dust removal branch pipe, a dust removal articulated chute and a dust removal cover plate, the dust storage unit comprises a small dust storage room, a dust hopper and a roller shutter door, a closed storage cavity is formed between the small dust storage room and the roller shutter door, an air pipe outlet communicated with the dust removal unit is formed in the small dust storage room, and the dust removal unit is communicated with the dust removal system through an air pipe. An electric valve is arranged on the air pipe, and interlocking control can be achieved. When the dust removal system works, dust on each layer of platform enters the dust removal elephant trunk through the dust removal opening and is finally stored in the dust hopper in the small dust storage room, smoke dust in the dust storage unit is extracted through the dust removal unit in the process, and after dust removal is finished, the dust hopper containing the dust is conveyed to a sintering workshop through the dust conveying unit to be recycled or conveyed to other areas to be subjected to follow-up treatment. The dust cleaning device is simple in structure, reasonable in arrangement, flexible in operation, safe and reliable, does not make direct contact with the surrounding environment in the whole dust cleaning process, can effectively prevent smoke dust from overflowing, and facilitates dust collection and internal cleaning.

Description

Technical Field

[0001] The utility model relates to the fields of steelmaking and industrial ventilation and dust removal, and particularly relates to an ash cleaning device for a multi-layer structure platform in steelmaking. Background Technique

[0002] During the converter steelmaking process, operations such as hot metal charging, scrap steel adding, belt unloading, and converter charging are involved. In addition, there are splashes during converter blowing, etc., which will inevitably generate a large amount of high-temperature flue gas and dust. The dust that is not absorbed by the dust removal system will float in the environment and accumulate on each layer of the platform, which is inevitable. In addition, equipment maintenance and repair are often carried out on the platform, which will also generate some garbage, etc., all of which need to be cleaned regularly.

[0003] At present, with the increasingly strict environmental protection requirements in the steel industry, each enterprise attaches great importance to environmental governance and emissions. If dust and the like are directly cleaned from the platform to the ground, it will inevitably generate a large amount of dust, causing environmental problems and a series of potential safety hazards for people. Some steel plants usually adopt the method of manual cleaning + handling for treatment. However, the highest height of the converter high-rise platform is > 70m, and the steelmaking process is continuously produced. Regular and frequent cleaning will increase the labor cost and the labor intensity of workers. Therefore, in view of the above situation, it is necessary to adopt an ash cleaning device and method for a multi-layer structure platform in steelmaking to solve these problems. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an ash cleaning device for a multi-layer structure platform in steelmaking, so as to effectively solve the problems of ash cleaning on the existing high-span multi-layer platform in steelmaking, environmental impact, and labor intensity of workers.

[0005] To achieve the above object, the utility model is realized through the following technical solutions:

[0006] The utility model provides an ash cleaning device for a multi - layer structure platform in steelmaking, which includes an ash cleaning unit, an ash storage unit, an ash conveying unit and a dust removal unit; the ash cleaning unit includes ash cleaning branch pipes, an ash cleaning chute pipe and an ash cleaning cover plate. The ash cleaning chute pipe extends downward from the top - most platform, passes through other platforms and then is connected to the ash storage unit placed below the bottom - most platform. Each platform is connected to the ash cleaning chute pipe through at least one ash cleaning branch pipe, and an ash cleaning cover plate is arranged at the opening of the ash cleaning branch pipe; the ash storage unit includes an ash storage small room, an ash hopper and a rolling shutter door. The rolling shutter door controls the opening and closing of the inlet and outlet of the ash storage small room. A closed storage cavity is formed between the ash storage small room and the rolling shutter door. The bottom outlet of the ash cleaning chute pipe extends into the ash storage small room, and the ash hopper is placed in the storage cavity and directly below the bottom outlet of the ash cleaning chute pipe; the dust removal unit is located above the ash storage small room, and the dust removal unit is connected to the ash storage unit through a dust removal air pipe; the dust removal unit includes a fan and an exhaust cylinder connected to the dust removal air pipe, and an electric valve is arranged on the dust removal air pipe; the ash conveying unit includes a forklift and a transport vehicle. The forklift is used to transfer the ash hopper with dust onto the transport vehicle, and the transport vehicle transports the ash hopper to the subsequent treatment location.

[0007] Further, an acoustic - optical alarm device is arranged on the top of the ash storage small room, and an electric valve is arranged on the dust removal air pipe. The acoustic - optical alarm device, the electric valve and the rolling shutter door are interlocked, and switches for controlling the acoustic - optical alarm device, the electric valve and the rolling shutter door are arranged on each platform.

[0008] Further, the part of the ash cleaning chute pipe between the bottom - most platform and the ash storage small room is set as an inclined section, and the rest parts are set as vertical sections. The ash cleaning branch pipes are inclined, and the ash cleaning branch pipes are connected to the ash cleaning chute pipe at an angle of 35°. At least a 200 - mm spacing is set between the ash hopper and the lower outlet of the ash cleaning chute pipe.

[0009] Further, pipe supports are arranged on the platform beams of other platforms except the top - most platform, and pipe supports are also arranged on the top of the ash storage small room. Each pipe support is used to fix the ash cleaning chute pipe. The pipe support is provided with a plurality of reinforcing ribs evenly distributed along the circumferential surface of the ash cleaning chute pipe, and each reinforcing rib is welded to the ash cleaning chute pipe and welded to the platform beam.

[0010] Further, the ash cleaning small room is located on the plane below the bottom - most platform and adopts a brick - concrete structure without windows. Two circular openings are arranged on the top of the ash storage small room, which are respectively used for connecting the dust removal air pipe and the ash cleaning chute pipe.

[0011] Further, the upper surface height of the ash cleaning cover plate is the same as the upper surface height of the platform at the same height.

[0012] Further, both the ash cleaning opening and the ash cleaning chute pipe are made of seamless steel pipes, and the ash cleaning unit is arranged at the edge of each platform.

[0013] Further, the bottom of the ash hopper is partially elevated to facilitate the operation of the forklift; a total of [number] lifting lugs are arranged on both sides of the ash hopper for use in hoisting and emptying the ash.

[0014] Furthermore, the dust cleaning cover plate includes a hinge, a steel plate and a round steel handle. The round steel handle is installed on the top surface of the steel plate. The steel plate is hinged to the platform or the dust cleaning branch pipe where it is located through the hinge. The opening of the dust cleaning branch pipe is opened or closed by flipping the steel plate, and the steel plate is coated with warning signs.

[0015] The utility model has the following beneficial effects:

[0016] The dust cleaning device provided by the utility model has a simple structure, reasonable layout, flexible operation, safety and reliability. In addition, the dust cleaning device can directly transfer a large amount of dust from a high-level platform to the ground, which not only reduces environmental pollution, improves the working environment, but also greatly reduces the labor intensity of workers. The device can be applied to the dust removal facilities in the environment of newly built factories, and is also applicable to the technical upgrading and transformation of existing systems.

[0017] By using the dust cleaning device provided by the utility model, the whole dust cleaning process does not directly contact with the surrounding environment, which can effectively prevent the overflow of soot and dust, facilitate dust collection and internal cleaning. The recovered dust contains a large amount of carbon, iron powder, calcium oxide, etc., which can be returned to sintering for resource recovery and utilization, achieving the effects of cost reduction, efficiency increase, energy conservation and consumption reduction. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the dust cleaning device for the multi-layer structure platform used in steelmaking provided by the utility model.

[0019] Figure 2 is Figure 1 a side view of the dust cleaning device.

[0020] Description of the reference numerals: 100, dust cleaning unit; 110, dust cleaning cover plate; 120, dust cleaning branch pipe; 130, dust cleaning chute; 140, dust cleaning tool; 150, pipe support; 160, audible and visual alarm device; 200, ash storage unit; 210, ash storage shed; 220, rolling shutter door; 230, ash hopper; 300, ash conveying unit; 310, forklift; 320, transport vehicle; 400, dust removal unit; 410, dust removal air duct; 420, dust removal valve. Detailed Embodiments

[0021] The following further describes the utility model in conjunction with the drawings and embodiments.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0023] As Figure 1 and Figure 2 shown, a dust cleaning device for a multi - layer structure platform in steelmaking of this embodiment includes a dust cleaning unit 100, a dust storage unit 200, a dust conveying unit 300, and a dust removal unit 400.

[0024] The dust cleaning unit 100 includes dust cleaning branch pipes 120, a dust cleaning chute 130, and a dust cleaning cover plate 110. The dust cleaning chute 130 extends downward from the top - most platform through other platforms and then communicates with the dust storage unit 200 placed below the bottom - most platform. Each platform is connected to the dust cleaning chute 130 through at least one dust cleaning branch pipe 120, and a dust cleaning cover plate 110 is arranged at the opening of the dust cleaning branch pipe 120.

[0025] The dust storage unit 200 includes a dust storage shed 210, a dust hopper 230, and a rolling shutter door 220. The rolling shutter door 220 controls the opening and closing of the inlet and outlet of the dust storage shed 210. A closed storage cavity is formed between the dust storage shed 210 and the rolling shutter door 220. The bottom outlet of the dust cleaning chute 130 extends into the dust storage shed 210, and the dust hopper 230 is placed in the storage cavity and directly below the bottom outlet of the dust cleaning chute 130.

[0026] The dust removal unit 400 is located above the dust storage shed 210. The dust removal unit 400 is connected to the dust storage unit 200 through a dust removal air duct 410, and an electric valve 420 is arranged on the air duct. The dust removal unit 400 includes a fan and an exhaust chimney connected to the end of the dust removal air duct 410. The dust removal unit 400 is connected to an external dust removal system through the dust removal air duct 410.

[0027] The dust conveying unit 300 includes a forklift 310 and a transport vehicle. The forklift 310 is used to transfer the dust - laden dust hopper 230 onto the transport vehicle, and the transport vehicle transports the dust hopper 230 to a subsequent treatment location.

[0028] A sound - light alarm device (such as a buzzer, an indicator light, etc.) 160 is arranged on the top of the dust storage shed 210, and an electric valve 420 is arranged on the dust removal air duct 410. The sound - light alarm device 160, the electric valve 420, and the rolling shutter door 220 are interlocked. Each platform is provided with a switch for controlling the sound - light alarm device 160, the electric valve 420, and the rolling shutter door 220. The sound - light alarm device 160 is located at an open - sight position on the top of the dust storage shed 210, and each layer of the platform is provided with a switch. When the dust cleaning starts, the sound - light alarm 160 is started. When the dust cleaning ends, the sound - light alarm device 160 is turned off, ensuring the safety and reliability of the dust cleaning work.

[0029] The part of the dust cleaning chute 130 between the bottom - most platform and the dust storage shed 210 is set as an inclined section, and the rest of the parts are set as vertical sections. The dust cleaning chute 130 is assembled in multiple sections according to the spatial layout, combining vertical pipes and inclined pipe sections, which can play a role in buffering the discharge of dust.

[0030] The dust cleaning branch pipe 120 is inclined, and the dust cleaning branch pipe 120 is connected to the dust cleaning chute 130 at an angle of 35°, and there is an angle of 35° between the dust cleaning branch pipe 120 and the dust cleaning chute 130 in the vertical direction to ensure a sufficient ash discharge angle.

[0031] The dust cleaning unit 100 is composed of a plurality of dust cleaning branch pipes 120 and dust cleaning chutes 130 according to the required number of dust cleaning platforms. Both the dust cleaning branch pipes 120 and the dust cleaning chutes 130 are made of seamless steel pipes. The dust cleaning unit 100 is arranged at the edge of the platform without affecting the overall layout of the platform and the operation of surrounding equipment; the upper surface height of the dust cleaning cover 110 is the same as the upper surface height of the platform at the same height. Both the dust cleaning port and the dust cleaning chute 130 are made of seamless steel pipes, and the dust cleaning unit is arranged at the edge of each platform.

[0032] A distance of at least 200 mm is set between the ash hopper 230 and the lower outlet of the dust cleaning chute 130. There is a safety distance of about 200 mm from the lower surface of the dust cleaning chute 130, which neither interferes with the dust cleaning chute 130 to ensure the normal transfer of the ash hopper 230, nor achieves the dust collection effect to minimize the smoke and dust spillage.

[0033] Pipe supports 150 are provided on the platform beams of other platforms except the topmost platform, and pipe supports 150 are also provided on the top of the ash storage small room 210. Each pipe support 150 is used to fix the dust cleaning chute 130. The pipe support 150 is provided with a plurality of reinforcing ribs evenly distributed along the circumferential surface of the dust cleaning chute 130, and each reinforcing rib is welded to the dust cleaning chute 130 and welded to the platform beam. There is a pipe support 150 between the dust cleaning chute 130 and each layer of platform beam. The pipe support 150 of this embodiment is welded and assembled by a 12 mm thick steel plate. The pipe support 150 of this embodiment is provided with 4 reinforcing ribs (the number of reinforcing ribs can be increased or decreased), evenly distributed at 360°. After being welded to the dust cleaning chute 130, it is then welded to the platform beam to bear the self-weight of the dust cleaning chute 130 and the impact load during ash discharge.

[0034] The dust cleaning small room is located on the plane (flatness ±0.00 m) below the bottommost platform and is made of brick-concrete structure without windows. A closed storage cavity can be formed between the ash storage small room 210 and the rolling shutter door 220 to prevent dust spillage.

[0035] There are two circular openings on the top of the ash storage small room 210, which are respectively used to connect the dust removal air duct 410 and the dust cleaning chute 130.

[0036] The rolling shutter door 220 adopts a PVC fast rolling shutter door 220, which is provided with an electric execution switch and can be opened and closed manually or remotely. The operation is simple, and it can play the roles of fire prevention, moisture prevention and wind prevention, and is strong and durable. In addition, the designed height of the rolling shutter door 220 needs to fully consider the normal passage of the forklift 310. The rolling shutter door 220 is usually in the closed state and can be opened only when the ash hopper 230 needs to be transferred;

[0037] The bottom of the ash hopper 230 is partially elevated to facilitate the operation of the forklift 310; a total of two lifting lugs are provided on both sides of the ash hopper 230 for hoisting and ash dumping. The ash hopper 230 is composed of channel steel and steel plates. When designing the bottom part, it is considered to be elevated to facilitate the operation of the forklift 310 in the ash conveying unit 300. In addition, a total of 4 lifting lugs are provided on both sides of the ash hopper 230 for hoisting and ash dumping;

[0038] The ash cleaning cover plate 110 includes a hinge, a steel plate and a round steel handle. The round steel handle is installed on the top surface of the steel plate. The steel plate is hinged to the platform or the ash cleaning branch pipe 120 where it is located through the hinge. The opening of the ash cleaning branch pipe 120 is opened or closed by flipping the steel plate, and the steel plate is coated with a warning sign. The height of the upper surface of the ash cleaning cover plate 110 is kept consistent with the height of the upper surface of the adjacent platform. The ash cleaning cover plate 110 is made of a simple hinge, a steel plate and a round steel handle, and can be opened and closed smoothly. It is coated with a warning sign and can only be opened when needed, otherwise it is in a closed state, which is safe and reliable;

[0039] The dust removal unit 400 is located above the ash storage small room 210. The dust removal unit 400 is connected to the ash storage unit 200 through a dust removal air pipe 410; an electric valve 420 is provided on the dust removal air pipe 410, and the end is connected to a fan and an exhaust pipe (the fan and the exhaust pipe are not shown in the figure). When the ash cleaning system starts to work, the fan is turned on, the electric valve 420 is opened, and the ash on each layer of the platform enters the ash cleaning chute 130 through the ash cleaning branch pipe 120, and finally is stored in the ash hopper 230 in the ash storage small room 210. Under the negative pressure suction of the fan, the dust in the ash storage unit 200 is extracted through the dust removal unit 400. When the ash cleaning is over, the dust removal system stops working.

[0040] Further, the distance between the electric valve 420 and the upper surface of the ash storage small room 210 is about 400 mm, which is convenient for maintenance. In addition, in order to capture the dust generated during ash cleaning to the greatest extent, the lower edge of the air inlet side of the dust removal unit 400 is as close as possible to the end of the ash cleaning chute 130, and only a certain installation and maintenance distance is left.

[0041] Further, there is a chain connection among the rolling shutter door 220, the electric valve 420 and the sound and light alarm device 160. When the ash cleaning starts, the sound and light alarm device 160 is turned on, the rolling shutter door 220 is closed by chain connection, and the electric valve 420 is opened by chain connection. When the ash cleaning is over, the sound and light alarm device 160 is turned off, and the electric valve 420 is closed by chain connection (with a delay of about 60 s) to ensure that the dust in the ash storage small room 210 is completely sucked away.

[0042] When dust accumulation on the platform needs to be handled, each system is put in place in advance. First, the operator uses the dust cleaning tool 140 to clean the platform ash to the vicinity of the dust cleaning branch pipe 120, and turns on the audible and visual alarm device 160. At this time, the rolling shutter door 220 is closed in a chain reaction, and a closed storage cavity is formed between the ash storage chamber 210 and the rolling shutter door 220. The electric valve 420 is opened in a chain reaction, and the dust removal unit 400 starts to work. At this time, the dust cleaning cover plate 110 is opened, and the platform ash enters the dust cleaning chute 130 through the dust cleaning branch pipe 120, and finally is stored in the ash hopper 230 in the ash storage chamber 210. Under the negative pressure suction of the fan, the soot generated during the process is extracted by the dust removal unit 400. After the dust cleaning is completed, the audible and visual alarm device 160 is turned off, and the electric valve 420 is closed in a chain reaction (with a delay of about 60 s) to ensure that the dust in the ash storage chamber 210 is completely sucked away. When the ash hopper 230 is full of dust and needs to be replaced, the rolling shutter door 220 is opened, and the forklift 310 enters the ash storage chamber 210. The forklift 310 is responsible for transporting the ash hopper 230 with dust to the transport vehicle 320 outside the ash storage chamber 210, and the transport vehicle 320 is responsible for transporting it to the sintering workshop for recycling or transporting it to other areas for subsequent processing.

[0043] This dust cleaning device has a simple structure, reasonable layout, flexible operation, and is safe and reliable. The entire dust cleaning process does not come into direct contact with the surrounding environment, can effectively prevent the overflow of soot, and is convenient for dust collection and internal cleaning. The recycled dust removal ash contains a large amount of carbon, iron powder, calcium oxide, etc., and can be returned to sintering for resource recycling, achieving the effects of cost reduction, efficiency improvement, energy conservation and consumption reduction. In addition, this device can directly transfer a large amount of dust from the high platform to the ground, which not only reduces environmental pollution and improves the working environment, but also greatly reduces the labor intensity of workers. This device can be applied to the dust removal facilities in the environment of newly built factories, and is also applicable to the technical upgrading and transformation of existing systems.

[0044] As described above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Claims

1. A dust cleaning device for a multi-layer structure platform in steelmaking, characterized in that, It includes a dust cleaning unit, a dust storage unit, a dust conveying unit and a dust removal unit; The dust cleaning unit includes dust cleaning branch pipes, a dust cleaning chute pipe and a dust cleaning cover plate. The dust cleaning chute pipe extends downward from the topmost platform through other platforms and then communicates with the dust storage unit placed below the bottommost platform. Each platform is connected to the dust cleaning chute pipe through at least one dust cleaning branch pipe, and a dust cleaning cover plate is arranged at the opening of the dust cleaning branch pipe; The dust storage unit includes a dust storage small room, a hopper and a rolling shutter door. The rolling shutter door controls the opening and closing of the inlet and outlet of the dust storage small room. A closed storage cavity is formed between the dust storage small room and the rolling shutter door. The bottom outlet of the dust cleaning chute pipe extends into the dust storage small room, and the hopper is placed in the storage cavity and directly below the bottom outlet of the dust cleaning chute pipe; The dust removal unit is located above the dust storage small room. The dust removal unit is connected to the dust storage unit through a dust removal air pipe; the dust removal unit includes a fan and an exhaust cylinder connected to the dust removal air pipe, and an electric valve is arranged on the dust removal air pipe; The dust conveying unit includes a forklift and a transport vehicle. The forklift is used to transfer the hopper with dust onto the transport vehicle, and the transport vehicle transports the hopper to the subsequent treatment location.

2. The dust cleaning device for the multi-layer structure platform used in steelmaking according to claim 1, characterized in that, An audible and visual alarm device is arranged on the top of the dust storage small room, and an electric valve is arranged on the dust removal air pipe. The audible and visual alarm device, the electric valve and the rolling shutter door are interlocked, and switches for controlling the audible and visual alarm device, the electric valve and the rolling shutter door are arranged on each platform.

3. The dust cleaning device for the multi-layer structure platform for steelmaking according to claim 1, characterized in that, The part of the dust cleaning chute pipe between the bottommost platform and the dust storage small room is set as an inclined section, and the rest of the parts are set as vertical sections. The dust cleaning branch pipes are inclined, and the dust cleaning branch pipes are connected to the dust cleaning chute pipe at an angle of 35°. At least a 200 mm spacing is set between the hopper and the lower outlet of the dust cleaning chute pipe.

4. The dust cleaning device for the multi-layer structure platform used in steelmaking according to claim 1, characterized in that, Pipe supports are arranged on the platform beams of other platforms except the topmost platform, and pipe supports are also arranged on the top of the dust storage small room. Each pipe support is used to fix the dust cleaning chute pipe. The pipe support is provided with a plurality of reinforcing ribs evenly distributed along the circumferential surface of the dust cleaning chute pipe, and each reinforcing rib is welded to the dust cleaning chute pipe and welded to the platform beam.

5. The dust cleaning device for the multi-layer structure platform used in steelmaking according to claim 1, characterized in that, The dust cleaning small room is located on the plane below the bottommost platform and adopts a brick-concrete structure without windows. Two circular openings are arranged on the top of the dust storage small room, which are respectively used to connect the dust removal air pipe and the dust cleaning chute pipe.

6. The dust cleaning device for the multi-layer structure platform used in steelmaking according to claim 1, characterized in that, The upper surface height of the dust cleaning cover plate is the same as the upper surface height of the platform at the same height.

7. The dust cleaning device for the multi-layer structure platform used in steelmaking according to claim 1, characterized in that, Both the dust cleaning opening and the dust cleaning chute pipe are made of seamless steel pipes, and the dust cleaning unit is arranged at the edge of each platform.

8. The dust cleaning device for the multi-layer structure platform for steelmaking according to claim 1, characterized in that, The bottom of the hopper is partially suspended to facilitate the operation of the forklift; a total of [number] lifting lugs are arranged on both sides of the hopper for use in hoisting and emptying the ash.

9. The dust cleaning device for the multi-layer structure platform used in steelmaking according to claim 1, characterized in that, The dust cleaning cover plate includes a hinge, a steel plate and a round steel handle. The round steel handle is installed on the top surface of the steel plate. The steel plate is hinged to the platform or the dust cleaning branch pipe where it is located through the hinge. The opening of the dust cleaning branch pipe is opened or closed by flipping the steel plate, and the steel plate is coated with warning signs.

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