Spraying dust falling device for recycled aggregate production

Abstract

The utility model discloses a spraying dust-settling device for recycled aggregate production, which comprises a crusher box body, a feeding bin is arranged at the top of the crusher box body, two crushing rollers are arranged in the feeding bin, a liquid collecting cavity is arranged in the crusher box body, the liquid collecting cavity is communicated with the feeding bin, a notch is arranged in the middle of the crusher box body, and the notch is communicated with the liquid collecting cavity. Two lug plates are fixed to the middle of one side of the crusher box body, rotating rollers are arranged between the two lug plates and in the liquid collecting cavity, and the two rotating rollers are arranged in parallel. The piston rod is pushed upwards to drive the piston to move upwards, when the piston moves upwards, purified water collected in the transfer cylinder can be discharged into the filter cylinder through the second guide pipe, at the moment, the flow direction of the purified water passing through the filter cotton is from top to bottom and is just opposite to the direction of the sewage passing through the filter cotton, and at the moment, the purified water plays a backwashing role. And the filter cotton can be preliminarily cleaned by backwashing, so that the period of dismounting the filter cotton for cleaning can be relatively prolonged.

Description

A spray dust suppression device for recycled aggregate production Technical Field

[0001] This utility model relates to the field of spray dust suppression technology, and in particular to a spray dust suppression device for recycled aggregate production. Background Technology

[0002] With the acceleration of urbanization, the problems of construction waste accumulation and urban flooding are becoming increasingly serious. By converting construction waste (such as waste concrete, bricks, and tiles) into recycled aggregates to replace traditional natural aggregates, the resource utilization rate of construction waste can be significantly improved, reducing the demand for the extraction of natural mineral resources and alleviating the pressure of resource depletion. However, the production of recycled aggregates generates a large amount of fugitive particulate matter (TSP, PM10), affecting the air quality in and around the plant area and endangering the health of workers and residents.

[0003] Publication number CN217313816U discloses a construction waste crusher with a spray dust removal function. The circulating spray water can carry away the dust during crushing, which enters the bottom of the crusher body for filtration and is then recycled, meeting environmental protection requirements.

[0004] The aforementioned existing technology can suppress dust during the crushing and conversion of construction waste through spraying, and can also collect and recycle the sprayed water. However, the above structural design has the following drawbacks: First, when the wastewater formed by the sprayed water carrying away particulate matter passes through the filter cotton, the direction of the wastewater through the filter cotton is "from top to bottom". That is, all the particulate matter and other impurities captured by the sprayed water need to be filtered through the filter cotton, increasing the burden on the filter cotton and thus shortening the time for cleaning the filter cotton; Second, precisely because the direction of the wastewater through the filter cotton is "from top to bottom", sludge and other particulate matter will accumulate on top of the filter cotton. Long-term accumulation not only affects its filtration effect, but also requires periodic disassembly and cleaning, further increasing the workload. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to propose a spray dust suppression device for recycled aggregate production. It adopts a "bottom-up" filtration flow direction and utilizes the gravity settling characteristics of particulate matter to achieve "mud-water pre-separation". This ensures that most particulate matter does not pass through the filter cotton, and only some light particulate matter mixed in the wastewater needs to be filtered by the filter cotton. This avoids all particulate matter and other impurities accumulating on the filter cotton, thereby extending the filtration cycle of the filter cotton. At the same time, this structure can also be combined with a "top-down" backwash flow direction, so that the backwash water flow direction is consistent with the natural settling direction of the particulate matter, which greatly improves the backwash efficiency and extends the cycle of disassembling the filter cotton for replacement or cleaning.

[0006] To achieve the above objectives, the present invention adopts the following technical solution. In a first aspect, the present invention provides a spray dust suppression device for recycled aggregate production, comprising a crusher housing, wherein a feed hopper is provided at the top of the crusher housing, two crushing rollers are arranged in the feed hopper, a liquid collection chamber is provided inside the crusher housing, and the liquid collection chamber is connected to the feed hopper; a plurality of first guide pipes are fixed at equal intervals on the lower part of one side of the crusher housing, and the first guide pipes are connected to the liquid collection chamber; the first guide pipes are inclined, and the inclination direction of the first guide pipes gradually rises from the crusher housing towards the intermediate rotation cylinder; a filter cylinder is fixed and connected to the end of the first guide pipe away from the crusher housing; a first circular metal mesh is fixed inside the filter cylinder; filter cotton is placed above the first circular metal mesh; an intermediate rotation cylinder is provided on one side of the crusher housing, and a plurality of second guide pipes are connected to the top of the intermediate rotation cylinder; the ends of the plurality of second guide pipes away from the intermediate rotation cylinder are fixed and connected to the corresponding filter cylinders; the connection between the first guide pipe and the filter cylinder is located below the filter cotton, and the connection between the filter cylinder and the second guide pipe is located above the filter cotton.

[0007] Preferably, a drain outlet is provided on the lower part of one side of the crusher housing, and the drain outlet is connected to the liquid collection chamber, and the first conduit is located above the drain outlet.

[0008] Preferably, the crusher housing has a slot in the middle, and the slot is connected to the liquid collection chamber. Two ear plates are fixed in the middle of one side of the crusher housing. Rotating rollers are provided between the two ear plates and in the liquid collection chamber. The two rotating rollers are arranged in parallel. A metal mesh conveyor belt is provided in the liquid collection chamber. The metal mesh conveyor belt is simultaneously wrapped around and tensioned on the outside of the two rotating rollers.

[0009] Preferably, a water tank is provided on one side of the transfer cylinder, and a third conduit is fixed and connected to the top of the water tank. The end of the third conduit away from the water tank is fixed and connected to the upper part of the transfer cylinder, and a valve is installed on the third conduit.

[0010] Preferably, a water pump is installed on the water tank, an inlet pipe is installed on the water pump inlet, the inlet pipe passes through the water tank and extends to the bottom of the water tank, an outlet pipe is installed on the water pump outlet, two L-shaped frames are fixed on the top of the crusher housing, a water collection box is fixed on the top of the two L-shaped frames, the outlet pipe and the water collection box are fixed and connected, and multiple nozzles are installed at the bottom of the water collection box.

[0011] Preferably, a first rotating shaft is fixed inside the crushing roller, and the first rotating shaft is rotatably connected to the crusher housing. A first motor is installed on the outside of the crusher housing. The end of the first rotating shaft extending outside the crusher housing is fixed to the output end of the first motor. A second rotating shaft is fixed inside the rotating roller. The two second rotating shafts are rotatably connected to the crusher housing and the ear plate, respectively. A second motor is installed on one of the ear plates, and the end of one of the second rotating shafts passing through the ear plate is fixed to the output end of the second motor.

[0012] Preferably, a rectangular groove is provided on one side of the bottom of the crusher housing, the rectangular groove is connected to the drain outlet, a rubber pad is provided in the rectangular groove, a cover plate that can block the drain outlet is provided in the rectangular groove, and mounting plates are fixed on both sides of the cover plate.

[0013] Preferably, the top of the filter cartridge is threaded with a cap, a connecting rod is fixed inside the cap, and a second circular metal mesh is fixed at the bottom of the connecting rod. The second circular metal mesh constrains the filter cotton between the first and second circular metal meshes.

[0014] Preferably, a piston is slidably connected inside the transfer cylinder, and multiple brackets are fixed at the bottom of the transfer cylinder. A guide ring is fixed at one end of each bracket near the axis of the transfer cylinder. A piston rod is slidably connected inside the guide ring, and the piston rod and piston are fixed together.

[0015] As can be seen from the above technical solutions, this application has the following beneficial effects:

[0016] 1. The sprayed liquid from the nozzles dissolves or adsorbs smaller particles. The sprayed liquid can then pass through the gaps or edges of the metal mesh conveyor belt and enter the collection chamber. It then collects into wastewater containing particles in the collection chamber. Some of these particles will settle due to gravity in the collection chamber. In addition, some lighter particles will flow with the wastewater. When the wastewater flows into the filter cartridge through the first conduit, it will be filtered in the filter cotton. The direction of wastewater flow is "from bottom to top". Some heavier particles will settle in the collection chamber, and only some lighter particles will be filtered in the filter cotton with the wastewater. This avoids the need for the filter cotton to filter all particles, thus extending the filter cotton cleaning cycle.

[0017] 2: Push the piston rod upward to move the piston upward. When the piston moves upward, the clean water collected in the transfer cylinder can be discharged into the filter cartridge through the second conduit. At this time, the flow direction of the clean water through the filter cotton is "from top to bottom", which is exactly the opposite of the direction of the sewage through the filter cotton. At this time, the clean water plays the role of backwashing. Backwashing can initially clean the filter cotton, thereby relatively extending the cycle of needing to disassemble and clean the filter cotton. Attached Figure Description

[0018] Figure 1 is a schematic diagram of a spray dust suppression device for recycled aggregate production provided by this utility model;

[0019] Figure 2 is a cross-sectional structural diagram of the crusher housing provided by this utility model;

[0020] Figure 3 is a schematic diagram of the spray dust suppression device for recycled aggregate production provided by this utility model from another perspective.

[0021] Figure 4 is a schematic diagram of the disassembled structure of the cover plate, rubber pad, and crusher housing provided by this utility model;

[0022] Figure 5 is a partial structural cross-sectional schematic diagram of a spray dust suppression device for recycled aggregate production provided by this utility model;

[0023] Figure 6 is an enlarged schematic diagram of the structure at point A in Figure 5 provided by this utility model;

[0024] Figure 7 is an enlarged schematic diagram of the structure at point B in Figure 5 provided by this utility model.

[0025] Attached Figure Descriptions: 1. Crusher housing; 2. Feed hopper; 3. First rotating shaft; 4. Crushing roller; 5. First motor; 6. Liquid collection chamber; 7. Groove; 8. Ear plate; 9. Second rotating shaft; 10. Rotating roller; 11. Metal mesh conveyor belt; 12. Second motor; 13. Drain outlet; 14. Water tank; 15. First guide pipe; 16. Filter cartridge; 17. First circular metal mesh; 18. Filter cotton; 19. Intermediate rotating cylinder; 20. Second guide pipe 21. Pipe; 22. Third conduit; 23. Water pump; 24. Inlet pipe; 25. Outlet pipe; 26. L-shaped bracket; 27. Water collection box; 28. Sprinkler head; 29. ​​Cylinder cover; 30. Connecting rod; 31. Second circular metal mesh; 32. Valve; 33. Piston; 34. Bracket; 35. Guide ring; 36. Piston rod; 37. Rectangular groove; 38. Rubber pad; 39. Cover plate; 40. Mounting plate; 41. Water inlet pipe; 42. Drain pipe. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] Refer to Figure 1-7:

[0028] In one embodiment of this utility model, a spray dust suppression device for recycled aggregate production is provided, including a crusher housing 1, a feed hopper 2 at the top of the crusher housing 1, two crushing rollers 4 inside the feed hopper 2, a liquid collection chamber 6 inside the crusher housing 1 connected to the feed hopper 2, a slot 7 in the middle of the crusher housing 1 connected to the liquid collection chamber 6, two ear plates 8 fixed in the middle of one side of the crusher housing 1, rotating rollers 10 arranged between the two ear plates 8 and inside the liquid collection chamber 6, the two rotating rollers 10 arranged in parallel, and a metal mesh conveyor belt 11 arranged inside the liquid collection chamber 6, the metal mesh conveyor belt 11 simultaneously surrounding and tensioning the outside of the two rotating rollers 10.

[0029] Furthermore, a drain port 13 is provided at the lower part of one side of the crusher housing 1, and the drain port 13 is connected to the liquid collection chamber 6. Multiple first guide pipes 15 are fixed at equal intervals at the lower part of one side of the crusher housing 1, and the first guide pipes 15 are connected to the liquid collection chamber 6. The first guide pipes 15 are located above the drain port 13. A filter cartridge 16 is fixed and connected to the end of the first guide pipe 15 away from the crusher housing 1. A first circular metal mesh 17 is fixed inside the filter cartridge 16, and filter cotton 18 is placed above the first circular metal mesh 17. A transfer cylinder 19 is provided on one side of the crusher housing 1. Multiple second guide pipes 20 are fixed and connected to the side wall of the transfer cylinder 19 near the top. The ends of the multiple second guide pipes 20 away from the transfer cylinder 19 are fixed and connected to the corresponding side wall of the filter cartridge 16 near the top. The first guide pipes 15 are inclined, and the inclination direction of the first guide pipes 15 is from the crusher housing 1. The structure gradually rises towards the intermediate transfer cylinder 19. A water tank 14 is installed on one side of the intermediate transfer cylinder 19. The upper and lower parts of the same side of the water tank 14 are respectively fixed and connected to a water inlet pipe 40 and a drain pipe 41. Both the water inlet pipe 40 and the drain pipe 41 are threaded with pipe caps. A third conduit 21 is fixed and connected to the top of the water tank 14. The end of the third conduit 21 away from the water tank 14 is fixed and connected to the side wall of the intermediate transfer cylinder 19 near the top. A water pump 22 is installed on the water tank 14. A water inlet pipe 23 is installed on the water inlet of the water pump 22. The water inlet pipe 23 passes through the water tank 14 and extends to the bottom of the water tank 14. A water outlet pipe 24 is installed on the water outlet of the water pump 22. Two L-shaped frames 25 are fixed on the top of the crusher housing 1. A water collection box 26 is fixed on the top of the two L-shaped frames 25. The water outlet pipe 24 and the water collection box 26 are fixed and connected. Multiple nozzles 27 are installed at the bottom of the water collection box 26. It should be understood that nozzle 27 can disperse spray liquid or water to achieve spraying.

[0030] It should be noted that initially, wastewater containing particulate matter accumulates in the collection chamber 6. The heavier particles will settle within the collection chamber 6 due to gravity. As the wastewater level in the collection chamber 6 gradually rises, it will eventually submerge the opening of the first conduit 15 within the collection chamber 6. Only then will the wastewater be transported from the first conduit 15 into the filter cartridge 16. Because the opening of the first conduit 15 within the collection chamber 6 is located above the drain outlet 13, meaning there is a gap between the first conduit 15 and the inner wall at the bottom of the collection chamber 6, the heavier particles that settle in the collection chamber 6 will not clog the first conduit 15. However, some relatively lighter particles may not clog. The sediment will settle in the collection chamber 6. It may settle during the conveying process of the first conduit 15. However, since the first conduit 15 is inclined and the inclination direction of the first conduit 15 gradually rises from the crusher housing 1 to the central rotating cylinder 19, the particles that may settle during the conveying process of the first conduit 15 will fall into the collection chamber 6 due to gravity and be collected after the particles accumulate in large quantities. Therefore, it will not cause blockage of the first conduit 15. In addition, there are some lighter particles, suspended solids and other impurities. These substances cannot settle quickly when the wastewater is reused. Therefore, filter cotton 18 is needed to filter them quickly.

[0031] In operation, when converting construction waste (such as waste concrete, bricks, and tiles) into recycled aggregate, the construction waste is poured into the feed hopper 2. The first motor 5 is started, driving the first rotating shaft 3 and the crushing roller 4 to rotate, causing the crushing roller 4 to crush the construction waste. The larger aggregates fall onto the metal mesh conveyor belt 11. The second motor 12 is then started, driving the second rotating shaft 9 and the rotating roller 10 to rotate. The rotating roller 10 drives the metal mesh conveyor belt 11, causing the larger aggregates falling onto the metal mesh conveyor belt 11 to be transported from the crusher housing 1 to the outside. While the construction waste is being crushed, the water pump 22 is started, causing water in the water tank 14 to be transported through the inlet pipe 23 and the outlet pipe 24 to the water collection box 26, and then sprayed out from the nozzle 27. This spray can suppress dust and other particulate matter generated during the crushing of construction waste. The spray liquid sprayed from the nozzle 27 dissolves or adsorbs the smaller particles, thus reducing dust. The spray liquid can pass through the gaps in the metal mesh conveyor belt 11 and enter the collection chamber 6, where it collects into wastewater containing particles. Some of these particles will settle due to gravity within the collection chamber 6, while some lighter particles will flow with the wastewater. After the wastewater flows through the first conduit 15 into the filter cartridge 16, it will be filtered through the filter cotton 18. The wastewater will then be transported from the second conduit 20 to the transfer cylinder 19, and then from the third conduit 21 to the water tank 14. This means that the water or spray liquid can be recycled. During this process, when the wastewater is filtered through the filter cotton 18, the flow direction of the wastewater is "from bottom to top." Some of the heavier particles will settle in the collection chamber 6, while only some of the lighter particles will be filtered through the filter cotton 18 with the wastewater. This avoids the need for the filter cotton 18 to filter all particles, thus extending the cleaning cycle of the filter cotton 18.

[0032] The crushing roller 4 has a first rotating shaft 3 fixed inside, which is rotatably connected to the crusher housing 1. A first motor 5 is installed on the outside of the crusher housing 1. The end of the first rotating shaft 3 extending outside the crusher housing 1 is fixed to the output end of the first motor 5. A second rotating shaft 9 is fixed inside the rotating roller 10. The two second rotating shafts 9 are rotatably connected to the crusher housing 1 and the ear plate 8, respectively. A second motor 12 is installed on one of the ear plates 8. One of the second rotating shafts 9 passes through the end of the ear plate 8 and is fixed to the output end of the second motor 12. A rectangular groove 36 is opened on one side of the bottom of the crusher housing 1. The rectangular groove 36 is connected to the drain outlet 13. A rubber pad 37 is installed inside the rectangular groove 36. A cover plate 38 that can block the drain outlet 13 is installed inside the rectangular groove 36. Mounting plates 39 are fixed on both sides of the cover plate 38.

[0033] It should be noted that the mounting plate 39 can be fixed to the crusher housing 1 by bolts, that is, it is fixed when the cover plate 38 blocks the drain port 13. At this time, the rubber gasket 37 is pressed on the cover plate 38 and the inner wall of the rectangular groove 36, thereby improving the sealing performance of the cover plate 38 blocking the drain port 13. It is worth mentioning that the bottom wall of the liquid collection chamber 6 is inclined, and the inclination direction of the bottom wall of the liquid collection chamber 6 is downward from the groove 7 to the drain port 13, so that when the sludge in the liquid collection chamber 6 is flushed later, the sludge can be discharged from the drain port 13.

[0034] In addition, the connection between the first conduit 15 and the filter cartridge 16 is located below the filter cotton 18, and the connection between the filter cartridge 16 and the second conduit 20 is located above the filter cotton 18. A valve 31 is installed on the third conduit 21. A cylinder cover 28 is threadedly connected to the top of the filter cartridge 16. A connecting rod 29 is fixed inside the cylinder cover 28. A second circular metal mesh 30 is fixed to the bottom of the connecting rod 29. The second circular metal mesh 30 constrains the filter cotton 18 between the first circular metal mesh 17 and the second circular metal mesh 30. A piston 32 is slidably connected inside the transfer cylinder 19. Multiple supports 33 are fixed to the bottom of the transfer cylinder 19. A guide ring 34 is fixed to one end of the supports 33 near the axis of the transfer cylinder 19. A piston rod 35 is slidably connected inside the guide ring 34. The piston rod 35 and the piston 32 are fixed together.

[0035] In use, after the wastewater is filtered through the filter cotton 18, some of the filtered purified water will remain in the transfer cylinder 19 and will not be transported to the water tank 14. When it is necessary to clean the filter cotton 18, close the valve 31, and then push the piston rod 35 upward to move the piston 32 upward. When the piston 32 moves upward, it can discharge the purified water collected in the transfer cylinder 19 through the second conduit 20 into the filter cartridge 16. At this time, the flow direction of the purified water through the filter cotton 18 is "from top to bottom", which is exactly the opposite of the direction of the wastewater through the filter cotton 18. It serves as a backwash, which can initially clean the filter cotton 18, thereby extending the cycle of needing to disassemble and clean the filter cotton 18. In addition, when the filter cotton 18 needs to be thoroughly cleaned or replaced, the cylinder cover 28 is rotated to remove it from the filter cylinder 16. At this time, the cylinder cover 28 drives the connecting rod 29 and the second circular metal mesh 30 to move out of the filter cylinder 16. At this time, the second circular metal mesh 30 no longer restrains the filter cotton 18, and the filter cotton 18 can be taken out of the filter cylinder 16 for thorough cleaning or replacement.

Claims

1. A spray dust suppression device for recycled aggregate production, comprising a crusher housing (1), characterized in that, The crusher housing (1) has a feed hopper (2) at the top, and two crushing rollers (4) are installed inside the feed hopper (2). The crusher housing (1) has a liquid collection chamber (6) inside, and the liquid collection chamber (6) is connected to the feed hopper (2). Multiple first guide pipes (15) are fixed at equal intervals on the lower part of one side of the crusher housing (1), and the first guide pipes (15) are connected to the liquid collection chamber (6). The first guide pipes (15) are inclined, and the inclination direction of the first guide pipes (15) gradually rises from the crusher housing (1) towards the central rotating cylinder (19). The end of the first guide pipe (15) away from the crusher housing (1) is fixed and A filter cylinder (16) is connected to the filter cylinder (16), and a first circular metal mesh (17) is fixed inside the filter cylinder (16). A filter cotton (18) is placed above the first circular metal mesh (17). A transfer cylinder (19) is provided on one side of the crusher housing (1). A plurality of second conduits (20) are connected to the top of the transfer cylinder (19). One end of the plurality of second conduits (20) away from the transfer cylinder (19) is fixed and connected to the corresponding filter cylinder (16). The connection between the first conduit (15) and the filter cylinder (16) is located below the filter cotton (18), and the connection between the filter cylinder (16) and the second conduit (20) is located above the filter cotton (18).

2. The dust suppression spraying device for recycled aggregate production according to claim 1, characterized in that, A drain port (13) is provided on the lower part of one side of the crusher housing (1), and the drain port (13) is connected to the liquid collection chamber (6), and the first conduit (15) is located above the drain port (13).

3. The dust suppression spraying device for recycled aggregate production according to claim 1, characterized in that, The crusher housing (1) has a slot (7) in the middle, and the slot (7) is connected to the liquid collection chamber (6). Two ear plates (8) are fixed in the middle of one side of the crusher housing (1). Rotating rollers (10) are provided between the two ear plates (8) and in the liquid collection chamber (6). The two rotating rollers (10) are arranged in parallel. A metal mesh conveyor belt (11) is provided in the liquid collection chamber (6). The metal mesh conveyor belt (11) is simultaneously wrapped around and tensioned on the outside of the two rotating rollers (10).

4. The dust suppression spraying device for recycled aggregate production according to claim 3, characterized in that, A water tank (14) is provided on one side of the transfer cylinder (19). A third conduit (21) is fixed and connected to the top of the water tank (14). The end of the third conduit (21) away from the water tank (14) is fixed and connected to the upper part of the transfer cylinder (19). A valve (31) is installed on the third conduit (21).

5. A spray dust suppression device for recycled aggregate production according to claim 4, characterized in that, A water pump (22) is installed on the water tank (14). An inlet pipe (23) is installed on the inlet of the water pump (22). The inlet pipe (23) passes through the water tank (14) and extends to the bottom of the water tank (14). An outlet pipe (24) is installed on the outlet of the water pump (22). Two L-shaped frames (25) are fixed on the top of the crusher housing (1). A water collection box (26) is fixed on the top of the two L-shaped frames (25). The outlet pipe (24) and the water collection box (26) are fixed and connected. Multiple nozzles (27) are installed at the bottom of the water collection box (26).

6. A spray dust suppression device for recycled aggregate production according to claim 5, characterized in that, The crushing roller (4) has a first rotating shaft (3) fixed inside. The first rotating shaft (3) is rotatably connected to the crusher housing (1). A first motor (5) is installed on the outside of the crusher housing (1). The end of the first rotating shaft (3) extending to the outside of the crusher housing (1) is fixed to the output end of the first motor (5). The rotating roller (10) has a second rotating shaft (9) fixed inside. The two second rotating shafts (9) are rotatably connected to the crusher housing (1) and the ear plate (8) respectively. A second motor (12) is installed on one of the ear plates (8). One of the second rotating shafts (9) passes through the end of the ear plate (8) and is fixed to the output end of the second motor (12).

7. A dust suppression spraying device for recycled aggregate production according to claim 1, characterized in that, A rectangular groove (36) is provided on one side of the bottom of the crusher housing (1). The rectangular groove (36) is connected to the drain port (13). A rubber pad (37) is provided in the rectangular groove (36). A cover plate (38) that can block the drain port (13) is provided in the rectangular groove (36). Mounting plates (39) are fixed on both sides of the cover plate (38).

8. A spray dust suppression device for recycled aggregate production according to claim 1, characterized in that, The filter cartridge (16) is threadedly connected to a cap (28) at the top. A connecting rod (29) is fixed inside the cap (28). A second circular metal mesh (30) is fixed at the bottom of the connecting rod (29). The second circular metal mesh (30) constrains the filter cotton (18) between the first circular metal mesh (17) and the second circular metal mesh (30).

9. A spray dust suppression device for recycled aggregate production according to claim 1, characterized in that, A piston (32) is slidably connected inside the transfer cylinder (19). Multiple brackets (33) are fixed at the bottom of the transfer cylinder (19). A guide ring (34) is fixed at one end of each bracket (33) near the axis of the transfer cylinder (19). A piston rod (35) is slidably connected inside the guide ring (34). The piston rod (35) and the piston (32) are fixed together.

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