A wind sifting device for construction recycled aggregates

Abstract

This utility model relates to the field of screening technology for recycled coarse aggregate in dry-mixed mortar, specifically to an air-separation device for recycled building aggregate. The device includes a housing, a fan mounted on the housing, and a duct mounted on the fan. A hood is mounted on the duct, and the duct is connected to the side wall of the housing via the hood. A partition is installed inside the housing. A feed hopper is located at the top of the housing, and a first discharge hopper and a second discharge hopper are located at the bottom of the housing. Both the feed hopper and the first discharge hopper are located on the side of the partition near the hood. A fixing ring is fitted onto the second discharge hopper, with the inner wall of the fixing ring installed at the bottom of the outer wall of the second discharge hopper. A collection mechanism is installed on the fixing ring. The collection mechanism includes two support plates above the fixing ring, a shell with an open top fitted onto the fixing ring, and two breathable collection bags mounted on the shell. This utility model provides an air-separation device for recycled building aggregate that improves the continuity of air-separation operations and reduces the number of fan start-ups and shutdowns.

Description

Technical Field

[0001] This utility model relates to the field of screening technology for recycled coarse aggregates in dry-mixed mortar, and specifically to an air separation device for recycled building aggregates. Background Technology

[0002] How to effectively handle and rationally utilize construction waste has become a crucial issue urgently needing to be addressed in urban management and environmental protection. Recycled construction aggregates refer to aggregates produced from waste concrete, bricks, stone, and other construction waste through a series of processing steps, which can be reused in construction projects and can replace natural sand and gravel as building materials. Therefore, as a recyclable resource, the research on the production process of recycled construction aggregates is of profound significance for promoting the resource utilization of construction waste and achieving sustainable development. Resource utilization, which transforms construction waste into reusable aggregates, can not only significantly reduce the amount of waste but also save natural resources and mitigate environmental damage. The production process of recycled aggregates includes manual or mechanical sorting, primary crushing, primary screening, secondary screening, secondary crushing, air separation for impurity removal, and magnetic separation for iron removal. Based on the physical and chemical properties of recycled aggregates, removing impurities such as wood chips, plastics, and dust adhering to the surface of waste concrete can significantly improve the purity of the aggregates, thereby optimizing the quality of recycled construction aggregates and making their application in construction projects more ideal.

[0003] Air separation is a technology that separates aggregate mixtures and impurities based on the significant differences in their aerodynamic properties, using airflow to achieve separation. A stable directional airflow is generated by a fan to disperse the aggregate mixture transported within the air separation device. Because the density of aggregates is greater than that of lightweight impurities such as wood chips and plastics, this density difference results in significantly different drag forces on the two materials in the airflow, allowing the lightweight impurities to be effectively dispersed. Different chambers are then used to separate the dispersed lightweight impurities and aggregates, enabling rapid and efficient air separation. However, the crushing process of construction waste generates a large amount of dust, resulting in a significant amount of dust mixed in the aggregate mixture. This leads to substantial dust generation during air separation, impacting the on-site environment. To address this issue, the air classifier employs a closed design, enclosing lightweight impurities such as dust and sawdust within the device. While this method prevents dust generation during the air classification process from impacting the working environment, the storage capacity of the air classifier is limited as lightweight impurities such as dust, sawdust, and plastic accumulate. This necessitates shutting down the air classifier for cleaning up these impurities, which disrupts the continuity and efficiency of the air classification operation. Therefore, there is room for improvement in the air classifier design to reduce the frequency of shutdowns and ensure efficient and stable operation of the air classification process. Summary of the Invention

[0004] In view of the shortcomings of the prior art, this utility model provides an air separation device for recycled building aggregates that improves the continuity of air separation operations and reduces the number of fan start-ups and shutdowns, thereby overcoming the defects in the prior art.

[0005] The technical solution adopted by this utility model is as follows: an air separation device for recycled building aggregate, comprising a box body with support legs, a fan mounted on the box body, and an air duct mounted on the fan. An air hood is mounted on the air duct, and the air duct is connected to the side wall of the box body through the air hood. A partition is installed inside the box body, located below the air hood. A feed hopper is provided at the top of the box body, and a first discharge hopper and a second discharge hopper are respectively provided at the bottom of the box body. The feed hopper and the first discharge hopper are both located on the side of the partition closest to the air hood, and the second discharge hopper is located on the other side of the partition. A fixing device is fitted onto the second discharge hopper. The inner wall of the fixed ring is installed at the bottom of the outer wall of the second discharge hopper, and a material collection mechanism is provided on the fixed ring. The material collection mechanism includes two support plates provided above the fixed ring, a shell with an open top fitted on the fixed ring, and two breathable material collection bags provided on the shell. The bottom plate of the shell has two material collection ports, the diameter of which is not less than the inner diameter of the second discharge hopper. The open ends of the two material collection bags are respectively installed on the two material collection ports. The two support plates are respectively installed on the top two sides of the shell, and the two support plates are respectively in contact with the outer walls of the two sides of the second discharge hopper.

[0006] Preferably, the support plate has several holes evenly spaced on it. A support rod is fitted inside each hole, and the diameter of the support rod matches the diameter of the hole. An n-shaped bracket is provided between the support rod and the fixing ring. The bracket is mounted on the bottom end of the support rod. A roller is rotatably mounted inside the bracket, with its bottom located below the bracket and its bottom end contacting the top surface of the fixing ring. A spring is movably fitted on the support rod, with both sides of the spring contacting the bracket and the support plate respectively. A nut is threaded onto the top of the support rod, and the nut is located above the support plate.

[0007] Preferably, the two collection ports are respectively opened on both sides of the shell, and both collection ports adopt a conical structure. The diameter of the collection port gradually decreases along the direction away from the fixing ring. A support ring is fitted inside the collection port. The outer shape of the support ring matches the middle and lower structure of the collection port. The open end of the collection bag is pressed against the collection port by the support ring.

[0008] Preferably, the shell is provided with an n-shaped handle on each side, and the bottom end of the handle is installed on the outer wall of the shell.

[0009] Preferably, a guide plate and a first baffle plate are respectively inclinedly arranged below the feed hopper, and the guide plate and the first baffle plate are respectively located on both sides of the feed hopper. The guide plate is an integral structure with the box body. The distance between the first baffle plate and the guide plate gradually decreases along the direction away from the feed hopper. A second baffle plate is arranged on the side of the first baffle plate away from the guide plate. The second baffle plate and the first baffle plate are respectively installed in the box body. The two sides of the first baffle plate and the two sides of the second baffle plate are respectively in contact with the inner walls of the two sides of the box body. A plurality of uniform material plates are arranged on the guide plate. The bottom ends of the plurality of uniform material plates are respectively installed on the top surface of the guide plate. The bottom end of the first baffle plate is in contact with the top of the uniform material plate, and the bottom end of the second baffle plate is in contact with the bottom of the uniform material plate. The guide plate is located above the wind hood.

[0010] Preferably, a dust collection box is provided on one side of the fan, and a fixing plate is horizontally arranged inside the dust collection box. The fixing plate has fixing holes, and a breathable dust collection bag is fitted into the fixing holes. The dust collection bag is installed in the dust collection box through the fixing plate. The dust collection box above the fixing plate has air holes, and the input end of the fan is connected to the dust collection box below the fixing plate.

[0011] Preferably, one side of the hood has a perforation, which is fitted onto one end of the air duct. One end of the hood is installed at the end of the air duct. The other side of the hood is inclined on the housing. The hood gradually rises along the direction close to the partition. The other end of the hood is installed on the housing. A through groove is provided on the side wall of the housing, which is fitted onto the other end of the hood.

[0012] The beneficial effects of this utility model are as follows: First, the utility model continuously conveys the airflow generated by the fan into the box through the set air duct and air cover. The set feed hopper is set above the box to convey the aggregate mixture into the box, so that the aggregate mixture moves downward naturally under the action of gravity. At the same time, the airflow generated by the fan blows the downward moving aggregate mixture to separate the light impurities such as dust, wood chips, and plastic mixed in the aggregate mixture. The set baffle divides the inner cavity at the bottom of the box to separate the dispersed aggregate and light impurities. The first discharge hopper and the second discharge hopper set on both sides of the baffle respectively can discharge the separated aggregate and light impurities separately. Furthermore, this invention uses a fixing ring on the second discharge hopper and two support plates on the housing to assemble the housing onto the second discharge hopper. The two support plates contact the outer walls on both sides of the second discharge hopper, allowing the housing to move only along the second discharge hopper. This drives the two collection bags to switch, so that one collection bag collects material from the second discharge hopper while the other collection bag is cleaned. Once the light debris collected by one collection bag reaches a predetermined range, the housing can be pushed to quickly replace the collection bag and collect the light debris, thus ensuring the continuity of the air separation operation and reducing the number of times the blower starts and stops.

[0013] Secondly, this invention uses a nut, screw, and bracket to rotate the rollers onto the support plate, transforming the sliding between the support plate and the fixed ring into rolling, thus pulling the housing to move. A spring further enhances the stability of the housing's movement by applying pressure between the support plate and the fixed ring. Moreover, a support ring inside the collection port presses the open end of the collection bag against the housing. Removing the support ring releases the collection bag's fixation, allowing for easy replacement and quick removal of collected lightweight debris. A handle facilitates movement of the housing, preventing direct contact between the operator and the housing during pushing or pulling.

[0014] Furthermore, this invention employs a material leveling mechanism comprised of a guide plate and a leveling plate to level the aggregate mixture conveyed in the feed hopper, enabling airflow to perform air classification on the aggregate mixture. A first baffle and a second baffle obstruct the flow of the aggregate mixture in the feed hopper, allowing it to be conveyed along the guide plate. Moreover, this invention utilizes a dust collection box, a fixing plate, and a dust collection bag to remove dust from the air drawn into the fan, preventing dust from entering the fan and the housing. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0016] Figure 2 for Figure 1 An enlarged diagram of A in the diagram.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Figure 4 for Figure 3 Enlarged diagram of point B in the middle.

[0019] Figure 5 for Figure 3 Enlarged diagram of point C in the middle.

[0020] Figure 6 for Figure 3 Enlarged diagram of point D in the middle. Detailed Implementation

[0021] like Figures 1 to 6As shown, an air separation device for recycled building aggregate includes a housing 2 with support legs 1, a fan 3 mounted on the housing 2, and a duct 4 mounted on the fan 3. A hood 5 is mounted on the duct 4, and the duct 4 is connected to the side wall of the housing 2 via the hood 5. The fan 3 is connected to the housing 2 via the duct 4 and the hood 5. A partition 6 is installed inside the housing 2, located below the hood 5. A feed hopper 7 is located at the top of the housing 2, and a first discharge hopper 8 and a second discharge hopper 9 are located at the bottom of the housing 2. The feed hopper 7, the first discharge hopper 8, and the second discharge hopper 9 are all connected to the housing 2 and are integral with the housing 2. The first discharge hopper 8 is located on the side of the partition 6 near the hood 5, and the second discharge hopper 9 is located on the other side of the partition 6. Aggregate mixture is fed into the housing 2 through the feed hopper 7. Under its own weight, the fed aggregate mixture moves downwards. Simultaneously, airflow is continuously supplied into the housing 2 through the hood 5. This airflow blows the downward-moving aggregate mixture along the direction from the first discharge hopper 8 to the second discharge hopper 9, using the airflow to blow lightweight impurities such as dust, wood chips, and plastic mixed in the aggregate mixture to the other side of the partition 6, so that the airflow can carry these lightweight impurities out of the second discharge hopper 9. Meanwhile, recycled construction aggregate falls into the partition near the hood 5, so that it can be discharged using the first discharge hopper 8. The second discharge hopper 9 is fitted with a fixing ring 10, the inner wall of which is installed at the bottom of the outer wall of the second discharge hopper 9. A material collection mechanism is provided on the fixing ring 10. The material collection mechanism includes two support plates 11 positioned above the fixing ring 10, a shell 12 with an open top fitted onto the fixing ring 10, and two breathable material collection bags 13 mounted on the shell 12. The bottom plate of the shell 12 has two material collection ports 14, the diameter of which is not less than the inner diameter of the second discharge hopper 9. The open ends of the two material collection bags 13 are respectively installed on the two material collection ports 14. The two support plates 11 are respectively installed on both sides of the top of the shell 12. The support plate 11 contacts the outer walls of the two sides of the second discharge hopper 9 respectively, so as to assemble the housing 12 onto the fixing ring 10 using the support plate 11. Furthermore, the fixing ring 10 below the support plate 11 contacts the inner wall of the housing 12, thereby using the fixing ring 10 to constrain the movement of the housing 12, so that the housing 12 and the support plate 11 can slide along the fixing ring 10 to drive the two collection bags 13 to move, so that one collection bag 13 is located below the second discharge hopper 9, so as to collect the light debris discharged from the second discharge hopper 9 using one collection bag 13. At the same time, the other collection bag 13 is located on one side of the second discharge hopper 9, so as to clean the light debris collected by the other collection bag 13.If the amount of lightweight debris collected by one of the collection bags 13 reaches a predetermined range, the other collection bag 13 is moved below the second discharge hopper 9 by pushing the housing 12, so as to quickly replace the collection bag 13 to collect the lightweight debris and continuously complete the air separation operation.

[0022] In this embodiment, the support plate 11 has a plurality of sleeve holes 15 evenly distributed on the support plate 11. A support rod 16 is fitted inside the sleeve hole 15, and the diameter of the support rod 16 matches the diameter of the sleeve hole 15. An n-shaped bracket 17 is provided between the support rod 16 and the fixing ring 10. The bracket 17 is installed on the bottom end of the support rod 16. A roller 18 is rotatably installed inside the bracket 17, with the bottom of the roller 18 located below the bracket 17 and the bottom end of the roller 18 contacting the top surface of the fixing ring 10. The support rod 16 is movably fitted with... A spring 19 is provided, with its two sides contacting the bracket 17 and the support plate 11 respectively. A nut 20 is threaded onto the top of the support rod 16, which is located above the support plate 11. The nut 20 is used to prevent the support rod 16 from falling off the support plate 11. The spring 19 is used to buffer the squeezing action between the support plate 11 and the fixing ring 10, so that the fixing ring 10 is tightly attached to the bottom plate of the housing 12. The roller 18 is used to convert the sliding between the support plate 11 and the fixing ring 10 into rolling, so as to pull the housing 12 to move and reduce the difficulty of operating the housing 12.

[0023] Specifically, the two collection ports 14 are respectively opened on both sides of the shell 12. Both collection ports 14 adopt a conical structure, and the diameter of the collection ports 14 gradually decreases along the direction away from the fixing ring 10. A support ring 21 is fitted inside the collection port 14. The outer shape of the support ring 21 matches the middle and lower structure of the collection port 14. The opening end of the collection bag 13 is pressed against the collection port 14 by the support ring 21. The support ring 21 is movably fitted inside the collection bag 13. Due to the outer shape of the collection port 14 and the support ring 21, The structure adopts a conical shape. When the collection bag 13 has a downward movement tendency, the collection bag 13 also drives the support ring 21 to have a downward movement tendency. Since the diameter of the collection port 14 gradually decreases along the direction away from the fixing ring 10, the support ring 21 with the downward movement tendency will squeeze the collection bag 13 onto the housing 12 to increase the friction force on the collection bag 13 and fix the collection bag 13 onto the housing 12. By removing the support ring 21, the fixing of the collection bag 13 can be released, thereby replacing the collection bag 13.

[0024] Please refer to it again. Figure 1 and 3 The housing 12 is provided with n-shaped handles 22 on both sides. The bottom end of the handle 22 is installed on the outer wall of the housing 12. By holding the handle 22, the housing 12 can be moved by pushing and pulling.

[0025] In this embodiment, a guide plate 23 and a first baffle plate 24 are respectively inclinedly arranged below the feed hopper 7. The guide plate 23 and the first baffle plate 24 are respectively located on both sides of the feed hopper 7. The guide plate 23 is an integral structure with the housing 2. The distance between the first baffle plate 24 and the guide plate 23 gradually decreases along the direction away from the feed hopper 7. A second baffle plate 25 is arranged on the side of the first baffle plate 24 away from the guide plate 23. The second baffle plate 25 and the first baffle plate 24 are respectively installed inside the housing 2. The two sides of the first baffle plate 24 and the two sides of the second baffle plate 25 are evenly distributed. The guide plate 23 is in contact with the inner walls of both sides of the housing 2. Several uniform material plates 26 are arranged radially and evenly on the guide plate 23. The bottom ends of the uniform material plates 26 are respectively installed on the top surface of the guide plate 23. The bottom end of the first baffle plate 24 is in contact with the top of the uniform material plate 26, and the bottom of the second baffle plate 25 is in contact with the bottom of the uniform material plate 26. The guide plate 23 is located above the wind hood 5, thereby uniformly processing the aggregate mixture conveyed to the housing 2 by the feed hopper 7 so that the aggregate mixture can be air-separated by airflow.

[0026] Please refer to it again. Figure 1 and 3 A dust collection box 27 is provided on one side of the fan 3. A fixing plate 28 is horizontally arranged inside the dust collection box 27, dividing the dust collection box 27 into two chambers. The fixing plate 28 has fixing holes, and a breathable dust collection bag 29 is fitted into the fixing holes. The dust collection bag 29 is installed in the dust collection box 27 through the fixing plate 28. The dust collection box 27 above the fixing plate 28 has air holes. The input end of the fan 3 is connected to the dust collection box 27 below the fixing plate 28, and the output end of the fan 3 is connected to the air duct 4. Thus, the dust collection bag 29 is used to remove dust from the air flowing into the air holes, so that the fan 3 can draw in the dust-treated air, thereby protecting the fan 3 and preventing the fan 3 from blowing dust in the air into the box 2.

[0027] Specifically, a perforation is provided on one side of the hood 5, which is fitted onto one end of the air duct 4. One end of the hood 5 is installed at the end of the air duct 4. The other side of the hood 5 is inclined on the housing 2. The hood 5 gradually rises along the direction close to the partition 6. The other end of the hood 5 is installed on the housing 2. A through groove is provided on the side wall of the housing 2, which is fitted onto the other end of the hood 5, so that the light impurities such as dust, wood chips, and plastic mixed in the aggregate mixture can be blown by airflow to the side of the partition 6 near the second discharge hopper 9.

[0028] The instructions for using this product are as follows: Figures 1 to 6As shown, firstly, this product is installed on the production line for recycled building aggregates, with the output end of the upstream conveyor connected to the feed hopper 7 to feed the aggregate mixture into the housing 2. Simultaneously, the input end of the downstream conveyor is connected to the first discharge hopper 8 to transport the aggregates that have undergone air separation. Next, the blower 3 is started, and the air treated by the dust collector bag 29 is transported into the housing 2 through the air duct 4 and the air hood 5. Then, the conveyor of the recycled building aggregate production line is started to feed the aggregate mixture into the housing 2 through the feed hopper 7, allowing the aggregate mixture to move naturally downwards under gravity. At the same time, the airflow generated by the blower 3 blows the downward-moving aggregate mixture to separate the dust, wood chips, plastics, and other lightweight impurities mixed in the aggregate mixture. The aggregates that have undergone air separation are discharged using the first discharge hopper 8, while the dust, wood chips, plastics, and other lightweight impurities are transported to one of the collection bags 13 through the second discharge hopper 9 by the airflow. The airflow is discharged through the collection bag 3 to meet the requirements of the air separation operation. In addition, when the light debris collected by one of the collection bags 13 reaches the predetermined range, the collection bag 13 can be quickly replaced by pushing the housing 12 to collect the light debris, avoiding production interruption due to the replacement of the collection bag 13, thus ensuring the continuity of the air separation operation.

[0029] In this embodiment, the airflow generated by the fan 3 is continuously conveyed into the housing 1 through the air duct 4 and the air cover 5. The feed hopper 7 is set above the housing 1 to convey the aggregate mixture into the housing 1, so that the aggregate mixture moves downward naturally under the action of gravity. At the same time, the airflow generated by the fan 3 blows the downward moving aggregate mixture to separate the light impurities such as dust, wood chips, and plastic mixed in the aggregate mixture. The inner cavity at the bottom of the housing is divided by the partition 6 to separate the dispersed aggregate and light impurities. The first discharge hopper 8 and the second discharge hopper 9 are respectively set on both sides of the partition 6 to discharge the separated aggregate and light impurities. Furthermore, this utility model uses a fixing ring 10 on the second discharge hopper 9 and two support plates 11 on the housing 12 to assemble the housing 12 onto the second discharge hopper 9. The two support plates 11 contact the outer walls on both sides of the second discharge hopper 9, allowing the housing 12 to move only along the second discharge hopper 9, thereby switching the two collection bags 13. One collection bag 13 collects material from the second discharge hopper 9, while the other collection bag 13 is cleaned. When the light debris collected by one collection bag 13 reaches a predetermined range, the housing 12 can be pushed to quickly replace the collection bag 13 to collect the light debris, thus ensuring the continuity of the air separation operation and reducing the number of times the blower 3 is started and stopped.

[0030] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. An air separation device for recycled building aggregate, comprising a housing (2) with support legs (1), a fan (3) mounted on the housing (2), and a duct (4) mounted on the fan (3), characterized in that: The air duct (4) is provided with an air cover (5), and the air duct (4) is connected to the side wall of the box (2) through the air cover (5). The box (2) is provided with a partition (6), which is located below the air cover (5). The top of the box (2) is provided with a feeding hopper (7), and the bottom of the box (2) is provided with a first discharge hopper (8) and a second discharge hopper (9). The feeding hopper (7) and the first discharge hopper (8) are both located on the side of the partition (6) close to the air cover (5), and the second discharge hopper (9) is located on the other side of the partition (6). A fixing ring (10) is fitted on the second discharge hopper (9), and the inner wall of the fixing ring (10) is installed on the bottom of the outer wall of the second discharge hopper (9). A material collection mechanism is provided on the fixing ring (10). The material collection mechanism includes two support plates (11) set above the fixed ring (10), a shell (12) with an open top fitted on the fixed ring (10), and two breathable material collection bags (13) set on the shell (12). The bottom plate of the shell (12) has two material collection ports (14). The diameter of the two material collection ports (14) is not less than the inner diameter of the second discharge hopper (9). The open ends of the two material collection bags (13) are respectively installed on the two material collection ports (14). The two support plates (11) are respectively installed on the top two sides of the shell (12). The two support plates (11) are respectively in contact with the outer walls of the two sides of the second discharge hopper (9).

2. The air-separation device for recycled building aggregates according to claim 1, characterized in that: The support plate (11) is provided with a number of sleeve holes (15), which are evenly distributed on the support plate (11). A support rod (16) is fitted inside the sleeve hole (15). The diameter of the support rod (16) matches the diameter of the sleeve hole (15). An n-shaped bracket (17) is provided between the support rod (16) and the fixing ring (10). The bracket (17) is installed on the bottom end of the support rod (16). A roller (18) is rotatably installed inside the bracket (17). The bottom of the roller (18) is located below the bracket (17). The bottom end of the roller (18) is in contact with the top surface of the fixing ring (10). A spring (19) is movably fitted on the support rod (16). The two sides of the spring (19) are in contact with the bracket (17) and the support plate (11) respectively. A nut (20) is threaded onto the top end of the support rod (16). The nut (20) is located above the support plate (11).

3. The air-separating device for recycled building aggregates according to claim 1, characterized in that: The two collection ports (14) are respectively opened on both sides of the shell (12). Both collection ports (14) adopt a conical structure. The diameter of the collection port (14) gradually decreases along the direction away from the fixing ring (10). A support ring (21) is fitted inside the collection port (14). The outer shape of the support ring (21) matches the middle and lower structure of the collection port (14). The opening end of the collection bag (13) is squeezed onto the collection port (14) by the support ring (21).

4. The air-separating device for recycled building aggregates according to claim 1, characterized in that: The shell (12) is provided with n-shaped handles (22) on both sides, and the bottom end of the handles (22) is installed on the outer wall of the shell (12).

5. The air-separating device for recycled building aggregates according to claim 1, characterized in that: Below the feed hopper (7), a guide plate (23) and a first baffle plate (24) are respectively inclinedly arranged. The guide plate (23) and the first baffle plate (24) are located on both sides of the feed hopper (7). The guide plate (23) and the box body (2) are integral structures. The distance between the first baffle plate (24) and the guide plate (23) gradually decreases along the direction away from the feed hopper (7). A second baffle plate (25) is arranged on the side of the first baffle plate (24) away from the guide plate (23). The second baffle plate (25) and the first baffle plate (24) are respectively arranged. The first baffle plate (24) and the second baffle plate (25) are respectively installed inside the box (2). The two sides of the first baffle plate (24) and the two sides of the second baffle plate (25) are respectively in contact with the inner walls of the two sides of the box (2). Several uniform plates (26) are provided on the guide plate (23). The bottom ends of the several uniform plates (26) are respectively installed on the top surface of the guide plate (23). The bottom end of the first baffle plate (24) is in contact with the top of the uniform plate (26). The bottom of the second baffle plate (25) is in contact with the bottom of the uniform plate (26). The guide plate (23) is located above the wind hood (5).

6. The air-separation device for recycled building aggregates according to claim 1, characterized in that: A dust collection box (27) is provided on one side of the fan (3). A fixing plate (28) is horizontally arranged inside the dust collection box (27). A fixing hole is provided on the fixing plate (28). A breathable dust collection bag (29) is fitted inside the fixing hole. The dust collection bag (29) is installed in the dust collection box (27) through the fixing plate (28). An air hole is provided in the dust collection box (27) above the fixing plate (28). The input end of the fan (3) is connected to the dust collection box (27) below the fixing plate (28).

7. The air-separation device for recycled building aggregates according to claim 1, characterized in that: The wind hood (5) has a perforation on one side, which is fitted onto one end of the air duct (4). One end of the wind hood (5) is installed on the end of the air duct (4). The other side of the wind hood (5) is inclined on the box body (2). The wind hood (5) gradually rises along the direction close to the partition (6). The other end of the wind hood (5) is installed on the box body (2). A through groove is opened on the side wall of the box body (2), which is fitted onto the other end of the wind hood (5).

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