A device and method for optimizing the enclosed dust suppression of a mobile unloading trolley.

Abstract

This invention discloses an optimized device and method for enclosed dust suppression of mobile unloading trolleys, belonging to the field of environmental engineering technology. It can be widely applied to material storage in mining, building materials, and coking industries. The invention features a main enclosed system composed of a silo top cover, steel columns, diagonal tie rods, crossbeams, and an outer corrugated steel sheet, along with dust curtains, steel plate enclosures, arc-shaped chute covers, arc-shaped metal mesh, and dust extraction hoods. Bulk materials are transported to the unloading port via a conveyor belt and temporarily stored in the silo. Dust particles generated during unloading float along both sides of the unloading port and are sucked in by the dust extraction hoods, then connected to a mobile ventilation duct via air ducts for negative pressure dust extraction. This significantly improves the working environment, reduces equipment energy consumption, and is easy to maintain, stable in operation, and safe.

Description

Technical Field

[0001] This invention relates to the field of environmental engineering technology, specifically to an optimized device and method for enclosed dust suppression of mobile unloading trolleys. Background Technology

[0002] Currently, unloading trolleys are frequently used in silos and batching rooms in industries such as mining and building materials. These trolleys unload bulk materials into corresponding silos according to their specifications and dimensions, enabling temporary storage in separate compartments to meet the needs of subsequent production processes. During the unloading process, the large drop in elevation causes the unloading trolley to carry a large amount of external air. Simultaneously, the unloading bulk material continuously compresses the internal space of the silo, leading to a continuous increase in the positive pressure of the air inside the silo. Dust mixed in with the bulk material overflows from the unloading ports on both sides of the trolley, causing severely excessive dust concentrations at work sites, greatly impacting the health of inspection personnel. Furthermore, the low visibility and obstructed field of vision create significant safety hazards, and the scattered dust significantly increases the failure rate of electrical control equipment.

[0003] The following solutions are commonly used to address dust generated by material throwing from unloading trolleys:

[0004] (1) "π" sealed. The disadvantages are: unstable operation, high failure rate, long-term operation may cause uneven wear of the wheel hub, or once the conveyor belt is stuck with powder, it is very easy to cause the belt to deviate or slip, which in turn causes the material throwing trolley to overturn.

[0005] (2) Conventional mobile ventilation ducts. The disadvantages are: large air volume required, high energy consumption of the ventilation fan, and large space occupied by the duct. At the same time, long-term use causes the rubber gasket to age and curl, reducing the sealing performance and resulting in a very high air leakage rate. Summary of the Invention

[0006] The purpose of this invention is to provide an optimized device and method for enclosed dust suppression of mobile unloading trolleys, which has the advantages of reduced energy consumption, stable operation, and simple maintenance, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A device for optimizing the enclosed dust suppression of a mobile unloading trolley includes a main enclosed system and a hopper top cover plate installed above the hopper. A steel plate enclosure is welded to the surface of the hopper top cover plate, and the bottom of the steel plate enclosure is reinforced by stiffening plates. An inclined chute is welded to the top of the steel plate enclosure, and the bottom of the chute extends to the unloading port of the hopper. The hopper top cover plate is fixed by a lateral support located on one side of the unloading port. A wear-resistant plate is installed between the unloading port and the lateral support. A transfer belt for transporting bulk materials is correspondingly installed above the hopper. The bulk materials are transported to the unloading port via the transfer belt. The conveyor belt outlet is equipped with an arc-shaped metal baffle to limit the unloading angle; the conveyor belt is also sealed with an arc-shaped chute cover, and a dust collection hood is installed above the conveyor belt. The dust collection hood connects the dust particles in the main sealed system to the mobile ventilation duct for negative pressure dust extraction via air duct; the main sealed system consists of a hopper top cover plate, steel columns, crossbeams, diagonal tie rods, and color steel tiles covering the outside of the crossbeams and steel columns; a dust curtain is suspended on the steel plate at the end of the crossbeam by bolts and nuts, and anti-roll plates are installed on both sides of the conveyor belt to prevent the dust curtain from rolling up.

[0009] Preferably, in the main sealed system, a 300mm*300mm plastic plate observation port is set every 8 to 10m in the color steel sheet, and the horizontal included angle β of the diagonal tie rod is 30 to 45°; the width of the steel plate welded to the end of the crossbeam is 300 to 400mm.

[0010] Preferably, the diameter of the steel wire in the arc-shaped metal mesh is Ф5~Ф8mm, the screen size is 20mm*20mm~50mm*50mm, and it is welded to the side of the conveyor head.

[0011] Preferably, the dust curtain is made of flexible rubber sheet, the width of the rubber sheet is rectangular or trapezoidal with a narrow top and wide bottom, the width of the rubber sheet is 200-300mm, the overlap width between sheets is 1 / 5 to 1 / 3 of the sheet width, and it is fixed to the crossbeam in the main sealed system by pre-welded bolts. The lower part of the dust curtain extends 150mm to 250mm beyond the steel plate enclosure.

[0012] Preferably, the right wing plate of the transverse support is provided with bolts of Φ12 to Ф16 and reserved holes for connecting the inverted L-shaped wear-resistant plate. The bolts pass through the reserved holes and are tightened with double nuts to tighten the wear-resistant plate.

[0013] Preferably, the anti-roll-up plate is made of PVC material, with a thickness of 3-4mm, a width of 500mm-800mm, and a height exceeding the lower return belt of the transfer belt by 250mm-450mm. It is fixed to both sides of the transfer belt to prevent the dust curtain from rolling onto the return belt.

[0014] Preferably, the steel plate enclosure is made of 10-15mm thick Q235 steel plate with a height of 200mm-300mm, and stiffening plates are installed on both sides every 10-15m.

[0015] Preferably, the chute is made of 5mm thick Q235 steel plate, and the slope α of the chute extending from the top of the steel plate enclosure to the unloading port is ≥ the angle of repose of the loose material.

[0016] This invention provides another technical solution: a method for optimizing the closed-loop dust suppression of a mobile unloading trolley, based on a device for optimizing the closed-loop dust suppression of a mobile unloading trolley, comprising the following steps:

[0017] Step 1: Bulk materials are transported to the unloading port via conveyor belt and temporarily stored in the silo;

[0018] Step 2: Dust particles generated during the unloading process float along both sides of the unloading port and are sucked in by the dust collection hood and connected to the mobile ventilation duct for negative pressure dust extraction via air duct.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention provides an optimized device and method for enclosed dust suppression of mobile unloading trolleys, which can be widely used in the storage of materials in mining, building materials, and coking industries. By setting up a main enclosed system composed of a silo top cover, steel columns, diagonal tie rods, crossbeams, and outer corrugated steel sheets, bulk materials are transported to the unloading port via a transfer belt and temporarily stored in the silo. Dust particles generated during the unloading process float along both sides of the unloading port and are sucked in by a dust collection hood and connected to a mobile ventilation duct for negative pressure dust extraction. This can significantly improve the working environment, reduce equipment operating energy consumption, and is also easy to maintain, stable in operation, and safe. Attached Figure Description

[0021] Figure 1 This is a front view of the overall structure of the present invention;

[0022] Figure 2 This is a side view of the present invention;

[0023] Figure 3 This is a structural diagram of the dust curtain installation of the present invention;

[0024] Figure 4 This is a structural diagram of the arc-shaped metal mesh baffle at the machine head of the present invention;

[0025] Figure 5 This is a detailed structural diagram of the wear-resistant plate installation of the present invention.

[0026] In the diagram: 1. Horizontal support; 2. Steel column; 3. Wear-resistant plate; 4. Discharge port; 5. Slide; 6. Top cover of silo; 7. Stiffening plate; 8. Steel plate enclosure; 9. Dust curtain; 10. Anti-roll plate; 11. Arc-shaped chute cover; 12. Dust hood; 13. Color steel sheet; 14. Crossbeam; 15. Diagonal tie rod; 16. Arc-shaped metal mesh; 17. Dust particles; 18. Bolt; 19. Nut; 20. Air duct; 21. Bulk material; 22. Transfer belt; 23. Silo. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-5 This invention provides an optimized dust suppression device for a mobile unloading trolley, comprising a main sealed system and a hopper top cover 6 installed above the hopper 23. A steel plate baffle 8 is welded to the surface of the hopper top cover 6, and the bottom of the steel plate baffle 8 is reinforced by stiffening plates 7. An inclined chute 5 is welded to the top of the steel plate baffle 8, and the bottom of the chute 5 extends to the unloading port 4 of the hopper 23, primarily to prevent the conveyor belt 22 from reversing and accumulating material near the steel plate baffle 8. The hopper top cover 6 is fixed by a transverse support 1, located on one side of the unloading port 4. A wear-resistant plate 3 is provided between the unloading port 4 and the transverse support 1 to prevent the transverse support 1 from being impacted by large-diameter loose material. A conveyor belt 22 for transporting loose material 21 is correspondingly installed above the hopper 23. The loose material 21 is transported to the unloading port 4 via the conveyor belt 22. An arc-shaped metal mesh is provided at the outlet of the conveyor belt 22 to limit the unloading angle. 16. To reduce the impact of materials on the steel column 2 and the facade corrugated steel sheet 13; the conveyor belt 22 is also sealed with an arc-shaped chute cover plate 11. As the unloading trolley moves back and forth, the conveyor belt 22 and the arc-shaped chute cover plate 11 repeatedly cross the dust curtain 9, achieving sealing without affecting the movement of the unloading trolley; a dust suction hood 12 is provided above the conveyor belt 22. The dust suction hood 12 connects the dust particles 17 in the main sealed system to the mobile ventilation slot through the air duct 20 for negative pressure dust extraction; the main sealed system is composed of the top cover plate 6 of the silo, the steel column 2, the crossbeam 14, the diagonal tie rod 15, and the corrugated steel sheet 13 covering the outside of the crossbeam 14 and the steel column 2; the dust curtain 9 is suspended on the steel plate at the end of the crossbeam 14 by bolts 18 and nuts 19. Anti-roll plates 10 are installed on both sides of the conveyor belt 22 to prevent the dust curtain 9 from rolling up to the conveyor belt 22.

[0029] In this embodiment of the invention, the color steel sheet 13 in the main sealed system is provided with a 300mm*300mm plastic plate observation port every 8 to 10m, which serves to allow light to pass through and to observe the unloading blockage. The horizontal included angle β of the inclined tie rod 15 is 30 to 45°. The steel plate welded to the end of the crossbeam 14 has a width of 300 to 400mm. On the one hand, holes can be drilled on it to install bolts 18 to hang the dust curtain 9, and on the other hand, it can intercept the floating dust.

[0030] In this embodiment of the invention, the arc-shaped chute cover 11 can reduce the wear on the dust curtain 9 and the resistance across the dust curtain 9 when the unloading trolley moves back and forth. The arc-shaped metal mesh 16 installed at the unloading end can limit the spray angle of the bulk material, screen larger particle size bulk material, and reduce the collision impact on the support of the steel column 2 and the facade color steel tile 13. The wire diameter of the arc-shaped metal mesh 16 is Ф5~Ф8mm, the screen hole size is 20mm*20mm~50mm*50mm, and it is welded to the side of the belt conveyor head.

[0031] In the above embodiment, the dust curtain 9 is made of flexible rubber sheet. The width of the rubber sheet is rectangular or trapezoidal with a narrow top and a wide bottom. The width of the rubber sheet is 200-300mm, and the overlap width between sheets is 1 / 5 to 1 / 3 of the sheet width. It is fixed to the crossbeam 14 in the main sealed system by pre-welded bolts 18. The lower part of the dust curtain 9 extends 150mm to 250mm beyond the steel plate enclosure 8.

[0032] In the above embodiment, the right wing plate of the transverse support 1 is provided with bolts 18 of Φ12~Ф16 and reserved holes for connecting the inverted L-shaped wear-resistant plate 3. The bolts 18 pass through the reserved holes and are tightened with double nuts 19 to the wear-resistant plate 3. The wear-resistant plate 3 can prevent the impact and collision of loose material on the lower transverse support 1, and fixing it with bolts 18 makes it convenient to replace the wear-resistant plate 3 later.

[0033] In this embodiment of the invention, the anti-roll-up plate 10 is made of PVC material, with a thickness of 3-4mm, a width of 500mm-800mm, and a height exceeding the lower return belt of the transfer belt 22 by 250mm-450mm. It is fixed to both sides of the transfer belt 22 to prevent the dust curtain 9 from rolling onto the return belt. At the same time, the use of PVC material can reduce weight and reduce the impact on the stability of the unloading trolley.

[0034] In the above embodiment, the steel plate enclosure 8 is made of 10-15mm thick Q235 steel plate, and its height is 200mm-300mm. Stiffening plates 7 are set every 10-15m on both sides. The chute 5 is made of 5mm thick Q235 steel plate. The slope α of the chute 5 extending from the top of the steel plate enclosure 8 to the unloading port 4 is ≥ the angle of repose of the loose material. This is mainly to prevent the return conveyor belt from carrying fine powder and accumulating it at the metal baffle, which would accumulate and thicken, affecting the stable operation of the unloading trolley.

[0035] To further explain the embodiments of the present invention, a method for optimizing the closed dust suppression of a mobile unloading trolley is also provided, comprising the following steps:

[0036] Step 1: Bulk material 21 is transported to unloading port 4 via conveyor belt 22 and temporarily stored in silo 23;

[0037] Step 2: Dust particles 17 generated during the unloading process float along both sides of the unloading port 4 and are sucked in by the dust hood 12 and connected to the mobile ventilation slot via the air duct 20 for negative pressure dust extraction.

[0038] Industrial application verification in a large steel plant's coke silo demonstrates that the optimized mobile unloading trolley dust suppression device and method of the present invention, after adopting the above technical solution, has the following positive effects:

[0039] (1) The dust suppression effect is obvious, and the dust concentration in the workplace is reduced by 70%-80%;

[0040] (2) Simple maintenance, stable operation, good safety, low failure rate, and low engineering cost;

[0041] (3) The air volume required for dust suppression during unloading is reduced by 30%-40%, and the energy consumption of the ventilation fan is reduced by 15%-20%.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for optimizing the sealed dust suppression of a mobile unloading trolley, characterized in that, The system includes a main enclosed system and a silo top cover (6) installed above the silo (23). A steel plate enclosure (8) is welded to the surface of the silo top cover (6). The bottom of the steel plate enclosure (8) is reinforced by a stiffening plate (7). An inclined chute (5) is welded to the top of the steel plate enclosure (8). The bottom of the chute (5) extends to the discharge port (4) of the silo (23). The silo top cover (6) is fixed by a transverse support (1). The transverse support (1) is located on one side of the discharge port (4). A wear-resistant plate (3) is provided between the discharge port (4) and the transverse support (1). A transfer belt (22) for transporting bulk materials (21) is provided above the silo (23). The bulk materials (21) are transported to the discharge port (4) via the transfer belt (22). A discharge port of the transfer belt (22) is provided. An arc-shaped metal baffle (16) is used to limit the unloading angle; an arc-shaped chute cover (11) is also sealed on the conveyor belt (22), and a dust suction hood (12) is provided above the conveyor belt (22). The dust suction hood (12) connects the dust particles (17) in the main sealed system to the mobile ventilation duct for negative pressure dust extraction via the air duct (20); the main sealed system is composed of a top cover plate (6) of the silo, a steel column (2), a crossbeam (14), a tie rod (15), and a color steel tile (13) covering the outside of the crossbeam (14) and the steel column (2); a dust curtain (9) is suspended on the steel plate at the end of the crossbeam (14) by bolts (18) and nuts (19), and anti-roll plates (10) are installed on both sides of the conveyor belt (22) to prevent the dust curtain (9) from rolling. In the main closed system, the color steel tile (13) is provided with a 300mm*300mm plastic plate observation port every 8~10m. The horizontal angle β of the inclined tie rod (15) is 30~45º. The width of the steel plate welded to the end of the crossbeam (14) is 300~400mm. The diameter of the steel wire of the arc-shaped metal mesh (16) is Ф5~Ф8mm, the screen size is 20mm*20mm~50mm*50mm, and it is welded to the side of the conveyor head. The dust curtain (9) is made of flexible rubber sheet. The width of the rubber sheet is rectangular or trapezoidal with a narrow top and wide bottom. The width of the rubber sheet is 200~300mm, and the overlap width between the sheets is 1 / 5~1 / 3 of the sheet width. It is fixed to the crossbeam (14) in the main closed system by pre-welded bolts (18). The length of the lower part of the dust curtain (9) beyond the steel plate enclosure (8) is 150mm~250mm. The right wing plate of the transverse support (1) is provided with bolts (18) of Φ12~Ф16 and reserved holes for connecting the inverted L-shaped wear-resistant plate (3). The bolts (18) pass through the reserved holes and are tightened with double nuts (19) to the wear-resistant plate (3). The anti-roll plate (10) is made of PVC material with a thickness of 3~4mm, a width of 500mm~800mm, and a height exceeding the lower return belt of the transfer belt (22) by 250mm~450mm. m, fixed to both sides of the transfer belt (22) to prevent the dust curtain (9) from rolling onto the return belt; the steel plate enclosure (8) is a 10~15mm thick Q235 steel plate with a height of 200mm~300mm, and stiffening plates (7) are set every 10~15m on both sides; the chute (5) is made of a 5mm thick Q235 steel plate, and the slope α of the chute (5) extending from the top of the steel plate enclosure (8) to the unloading port (4) is ≥ the angle of repose of the loose material.

2. A method for optimizing the dust suppression of a mobile unloading trolley, implemented based on the device for optimizing the dust suppression of a mobile unloading trolley according to claim 1, characterized in that, Includes the following steps: Step 1: Bulk materials (21) are transported to the unloading port (4) via the transfer belt (22) and temporarily stored in the silo (23); Step 2: Dust particles (17) generated during the unloading process float along both sides of the unloading port (4), are sucked in by the dust hood (12), and connected to the mobile ventilation slot via the air duct (20) for negative pressure dust extraction.

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