Dust removal device for asphalt concrete production

Abstract

The utility model relates to a dust removal device for asphalt concrete production, which comprises a rack, a dust collecting hopper arranged on the rack, an air duct communicated with the bottom of the dust collecting hopper, a grid net arranged between the dust collecting hopper and the air duct, a dust removal filter screen arranged on the top of the dust collecting hopper, and a dust collecting cover arranged on the dust removal filter screen, and an opening is arranged on one side of the dust collecting cover. The utility model has the advantages of reducing dust raising in the mixing site and facilitating the recycling of mineral powder.

Description

Technical Field

[0001] This utility model relates to the technical field of asphalt concrete production, and in particular to a dust removal device for asphalt concrete production. Background Technology

[0002] Asphalt concrete, commonly known as asphalt aggregate, is a mixture made by artificially selecting aggregates with a specific gradation, such as crushed stone or crushed gravel, stone chips or sand, and mineral powder, and mixing them with a certain proportion of road asphalt materials under strictly controlled conditions. Hot-mix asphalt mixtures are best mixed mechanically at a centralized location. Fixed hot-mix plants are generally used, while mobile hot-mix plants are preferred for longer routes. Cold-mix asphalt mixtures can be mixed centrally or on-site. The main equipment of an asphalt mixing plant includes: an asphalt heating boiler, sand and gravel storage area, mineral powder silo, heating drum, mixing machine and weighing equipment, steam boiler, asphalt pump and pipeline, dust removal facilities, etc. Some plants also have equipment for re-screening and storing hot aggregates. Mixing machines can be divided into two main categories: continuous and batch mixing. In terms of preparation process, in the past, the sand and gravel were often dried and heated first, and then mixed with hot asphalt and cold mineral powder. Another method has been developed: first, mix the wet aggregate with hot asphalt, and then heat and mix it thoroughly to eliminate fly ash caused by the heating and drying of the aggregate. When using the latter process, to prevent residual moisture in the mixture from affecting the service life of the asphalt concrete, it is best to use an asphalt anti-stripping agent at the same time to enhance its water resistance.

[0003] Currently, during the production of asphalt concrete, adding raw materials to the mixing tank often generates dust, especially when adding mineral powder, which produces a large amount of dust. If this dust is directly released into the atmosphere, it can easily cause environmental pollution. Therefore, dust collection devices are usually installed at the point where asphalt concrete raw materials are added. However, common dust collection methods use spraying, but with this method, the mineral powder is directly disposed of upon landing, preventing its recycling. Therefore, to improve existing dust collection methods, a dust collection device capable of recycling and processing dust is designed. Utility Model Content

[0004] The present invention addresses the aforementioned shortcomings in the existing technology by providing a dust removal device for asphalt concrete production, which has the advantages of reducing dust at the mixing site and facilitating the recovery of mineral powder.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: A dust removal device for asphalt concrete production includes a frame, a dust collection hopper mounted on the frame, an air duct communicating with the bottom of the dust collection hopper, a grid mesh disposed between the dust collection hopper and the air duct, a dust removal filter mesh covering the top of the dust collection hopper, and a dust collection hood covering the dust removal filter mesh, wherein one side of the dust collection hood is provided with an opening.

[0006] By adopting the above technical solution, during asphalt concrete production, the dust-laden air generated enters the dust collection hood through the opening of the dust collection hopper. Firstly, larger dust particles are intercepted by a dust filter screen, which can be coated with an electrostatic adsorption coating for initial filtration of dust. Smaller dust particles continue to pass through the dust filter screen with the airflow and enter the dust collection hopper. When the dust-laden airflow passes through a grid screen, the grid screen further blocks the dust, keeping it within the dust collection hopper. Simultaneously, the duct design guides the airflow direction, allowing for smooth air discharge. The grid screen between the dust collection hopper and the duct effectively prevents larger dust particles from entering and causing blockages. The dust collected in the dust collection hopper mainly consists of recyclable materials such as mineral powder, which can be easily recycled later. This reduces dust generation at the mixing site, preventing direct emission of dust into the atmosphere and causing environmental pollution, while also enabling mineral powder recovery, improving resource utilization. The entire device has a simple structure, is mounted on a frame, and is easy to arrange and use on the production site, effectively meeting the dust removal and recycling needs during asphalt concrete production.

[0007] The present invention is further configured such that the longitudinal section of the dust collection hopper is approximately an inverted trapezoid.

[0008] By adopting the above technical solution, the inverted trapezoidal dust collection hopper, which is wider at the top and narrower at the bottom, has a larger opening, which can collect dust-laden air over a wider area and improve dust collection efficiency. When the dust-laden air enters the dust collection hopper from the larger opening, the airflow speed gradually increases as the dust collection hopper gradually narrows downwards. This helps to better concentrate the dust at the bottom of the dust collection hopper, which is convenient for subsequent recycling and processing.

[0009] The present invention is further configured such that: one side of the dust collection hopper is provided with an opening and a baffle is magnetically attached thereto.

[0010] By adopting the above technical solution, when it is necessary to clean or recycle the dust collected in the dust collection hopper, the magnetically adsorbed baffle can be easily removed, and the dust can be taken out through the opening on one side of the dust collection hopper. This design avoids the trouble of having to disassemble the entire dust collection hopper to clean the dust in the traditional way, making the operation simpler and faster.

[0011] The present invention is further configured such that the cross-section of the air duct is inverted T-shaped.

[0012] By adopting the above technical solution, the wider horizontal section of the inverted T-shaped air duct can disperse airflow over a larger area, allowing dust-laden air to enter the air duct more evenly. This avoids the situation where airflow is concentrated in one place, resulting in excessively high or low wind speeds in some areas, and improves the air duct's capacity to hold dust-laden air. The vertical section, on the other hand, plays the role of concentrating and guiding airflow, gathering the dispersed dust-laden air and guiding it to the subsequent treatment devices. This effectively reduces the resistance of airflow within the air duct and ensures the stable operation of the entire dust removal device for asphalt concrete production.

[0013] The present invention is further configured such that: a U-shaped bottom reinforcing rib is provided in the air duct, a top reinforcing rib inserted into the bottom reinforcing rib and in the shape of an inverted U, and a pair of symmetrically arranged connecting ribs are provided between the bottom reinforcing rib and the top reinforcing rib.

[0014] By adopting the above technical solution, the U-shaped bottom reinforcing rib can enhance the structural strength of the bottom of the air duct, effectively resist the pressure and impact force on the bottom of the air duct, and prevent the bottom from deforming due to long-term bearing of the weight of dusty air and airflow impact. The inverted U-shaped top reinforcing rib reinforces the top of the air duct, and works together with the bottom reinforcing rib to make the overall structure of the air duct more stable. A pair of symmetrically arranged connecting ribs connect the bottom reinforcing rib and the top reinforcing rib, further enhancing the stability and integrity of the entire reinforcing rib structure, and tightly connecting the bottom and top reinforcing ribs together to form a solid frame structure. This reinforcing rib setting method can significantly improve the structural strength and stability of the air duct, ensuring that the air duct will not be damaged or deformed due to the impact and pressure of airflow during long-term use, thereby extending the service life of the air duct.

[0015] The present invention is further configured such that the opening of the dust collection hood is a gradually expanding opening.

[0016] By adopting the above technical solution, the gradually expanding opening design can increase the opening area of ​​the dust collection hood, so that the dust-laden air has a larger collection range when entering the dust collection hood, thus improving the dust collection efficiency. When the dust-laden air enters the dust collection hood from the air duct, the gradually expanding opening can reduce the air velocity, making the airflow more stable and reducing air disturbance. This helps the dust to settle better inside the dust collection hood, rather than escaping again with the airflow.

[0017] In summary, the beneficial technical effects of this utility model are as follows: the dust removal device for asphalt concrete production, through the cooperation of components such as dust collection hopper, air duct, grid, dust removal filter and dust collection hood, forms a complete dust removal and recycling system, which effectively solves the problems of large dust in the mixing site and difficulty in recycling mineral powder in the existing technology, and has the advantages of reducing dust in the mixing site and facilitating the recycling of mineral powder. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the dust removal device for asphalt concrete production according to this utility model.

[0019] Figure 2 This is a schematic diagram showing the connection relationship between the dust collection hopper, baffle and air duct of this utility model.

[0020] Figure 3 This is a schematic diagram of the air duct structure of this utility model.

[0021] In the diagram, 1 is the frame; 2 is the dust collection hopper; 21 is the baffle; 3 is the air duct; 31 is the bottom reinforcing rib; 32 is the top reinforcing rib; 33 is the connecting rib; 4 is the grille; 5 is the dust filter; and 6 is the dust collection hood. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Reference Figure 1 This utility model discloses a dust removal device for asphalt concrete production, comprising a frame 1, a dust collection hopper 2 mounted on the frame 1, an air duct 3 connected to the bottom of the dust collection hopper 2, a grid mesh 4 disposed between the dust collection hopper 2 and the air duct 3, a dust removal filter 5 covering the top of the dust collection hopper 2, and a dust collection hood 6 covering the dust removal filter 5. The dust collection hood 6 has a gradually widening opening on one side.

[0024] During asphalt concrete production, the dust-laden air generated enters the dust collection hood 6 through the opening of the dust collection hopper 2. First, larger dust particles are intercepted by the dust filter screen 5, which is coated with an electrostatic adsorption coating for initial filtration. Smaller dust particles continue to pass through the dust filter screen 5 and enter the dust collection hopper 2 with the airflow. When the dust-laden airflow passes through the grid screen 4, the grid screen 4 further blocks the dust, keeping it within the dust collection hopper 2. Simultaneously, the air duct 3 guides the airflow direction, allowing for smooth air discharge. The grid screen 4 between the dust collection hopper 2 and the air duct 3 effectively prevents larger dust particles from entering the air duct 3 and causing blockages. The dust collected in the dust collection hopper 2 mainly consists of recyclable materials such as mineral powder, which can be easily recycled later. This design reduces dust at the mixing site, preventing direct emissions into the atmosphere and environmental pollution, while also enabling mineral powder recovery and improving resource utilization. The entire device has a simple structure, is mounted on frame 1, and is easy to install and use in the production site, effectively meeting the dust removal and recycling needs in the asphalt concrete production process. The flared design increases the opening area of ​​the dust collection hood 6, allowing for a larger collection range when dust-laden air enters the hood, thus improving dust collection efficiency. When dust-laden air enters the dust collection hood 6 from the duct 3, the flared opening reduces the air velocity, making the airflow more stable and reducing air turbulence. This helps dust settle better within the dust collection hood 6, rather than escaping again with the airflow.

[0025] Reference Figure 2 The dust collection hopper 2 has an approximately inverted trapezoidal longitudinal section. One side of the hopper has an opening with a magnetically attached baffle 21. The trapezoidal shape, wider at the top and narrower at the bottom, allows for a larger opening, enabling the collection of dust-laden air over a wider area and improving dust collection efficiency. As the dust-laden air enters the hopper through the larger opening, the airflow gradually increases as the hopper narrows downwards, helping to concentrate the dust at the bottom for easier subsequent recycling. When cleaning or recycling the dust collected in the hopper is required, the magnetically attached baffle 21 can be easily removed, and the dust can be extracted through the opening on one side of the hopper. This design avoids the hassle of potentially disassembling the entire hopper 2 for cleaning, making the operation simpler and faster.

[0026] Reference Figure 3The cross-section of the air duct 3 is inverted T-shaped. Inside the air duct 3 are U-shaped bottom reinforcing ribs 31, inverted U-shaped top reinforcing ribs 32 inserted into the bottom reinforcing ribs 31, and a pair of symmetrically arranged connecting ribs 33 between the bottom and top reinforcing ribs 31 and 32. The wider lateral portion of the inverted T-shaped air duct 3 disperses airflow over a larger area, allowing dust-laden air to enter the air duct 3 more evenly. This avoids airflow concentration in one area, preventing excessively high or low wind speeds in certain regions, and improves the air duct 3's capacity to hold dust-laden air. The longitudinal portion concentrates and guides the airflow, gathering the dispersed dust-laden air and directing it to subsequent processing devices. This effectively reduces airflow resistance within the air duct 3, ensuring the stable operation of the entire dust removal device for asphalt concrete production. The U-shaped bottom reinforcing rib 31 enhances the structural strength of the bottom of the air duct 3, effectively resisting the pressure and impact on the bottom of the air duct 3, and preventing deformation of the bottom due to long-term bearing of the weight of dusty air and airflow impact. The inverted U-shaped top reinforcing rib 32 reinforces the top of the air duct 3, working together with the bottom reinforcing rib 31 to make the overall structure of the air duct 3 more stable. A pair of symmetrically arranged connecting ribs 33 connect the bottom reinforcing rib 31 and the top reinforcing rib 32, further enhancing the stability and integrity of the entire reinforcing rib structure, tightly connecting the bottom and top reinforcing ribs together to form a solid frame structure. This reinforcement method can significantly improve the structural strength and stability of the air duct 3, ensuring that the air duct 3 will not be damaged or deformed due to the impact and pressure of airflow during long-term use, thereby extending the service life of the air duct 3.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dust removal device for asphalt concrete production, characterized in that: It includes a frame (1), a dust collection hopper (2) disposed on the frame (1), an air duct (3) communicating with the bottom of the dust collection hopper (2), a grid mesh (4) disposed between the dust collection hopper (2) and the air duct (3), a dust removal filter (5) covering the top of the dust collection hopper (2), and a dust collection cover (6) covering the dust removal filter (5), wherein the dust collection cover (6) has an opening on one side.

2. The dust removal device for asphalt concrete production according to claim 1, characterized in that: The longitudinal section of the dust collection hopper (2) is approximately an inverted trapezoid.

3. The dust removal device for asphalt concrete production according to claim 1, characterized in that: The dust collection hopper (2) has an opening on one side and a baffle (21) is magnetically attached to it.

4. The dust removal device for asphalt concrete production according to claim 1, characterized in that: The cross-section of the air duct (3) is inverted T-shaped.

5. A dust removal device for asphalt concrete production according to claim 1, characterized in that: The air duct (3) is provided with a U-shaped bottom reinforcing rib (31), a top reinforcing rib (32) inserted into the bottom reinforcing rib (31) and in the shape of an inverted U, and a pair of symmetrically arranged connecting ribs (33) between the bottom reinforcing rib (31) and the top reinforcing rib (32).

6. A dust removal device for asphalt concrete production according to claim 1, characterized in that: The opening of the dust collection hood (6) is configured as a gradually expanding opening.

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