Light substance air selection machine dust removal system with negative pressure regulation function

Abstract

The utility model belongs to the field of dust removal of air separator, specifically relates to a light material air separator dust removal system with negative pressure regulating function, including fan, gas shunt device, air separator separation chamber, settling tank and dust remover, one end of gas shunt device is equipped with air inlet, and the other end of gas shunt device is equipped with first shunt and second shunt, and the air inlet is connected with the gas outlet of fan, and the first shunt is connected with dust removal pipeline between the dust remover, and the second shunt is connected with air inlet pipeline between the air separator separation chamber, and the air separator separation chamber is communicated with the settling tank, and the air inlet between the settling tank and fan is connected with return air pipeline, the utility model can adjust the size of negative pressure in settling tank, ensures that the stable negative pressure state is maintained in settling tank all the time, effectively prevents the pollution caused by solid particulate matter overflow, simultaneously, the air flow of fan discharge is sent back in settling tank and participates in internal circulation, thereby effectively reduce energy consumption, and it is more environmental protection.

Description

Technical Field

[0001] This utility model relates to a dust removal system for a light material air classifier with negative pressure regulation function, belonging to the field of air classifier dust removal technology. Background Technology

[0002] With the ongoing urbanization process, the amount of construction and demolition waste is constantly increasing. Construction and demolition waste refers to solid waste generated during the renovation and demolition of buildings. Its resource recycling can reduce dependence on mineral resources. Air separators utilize the difference in bulk density between materials, using airflow to remove lightweight materials and dust, while also removing some heavier impurities such as small stones and branches. In the process of handling construction and demolition waste, air separators are crucial equipment; the adjustment of their airflow and pressure directly affects the impurity removal effect and whether environmental standards are met.

[0003] Existing air classifier dust removal systems directly supply positive pressure to the separation chamber via a fan, and connect to the production line dust removal system via a dust removal air duct outside the settling box. When the type of material or production volume changes, the required airflow for material removal also changes. However, existing technology cannot adjust the air pressure according to changes in on-site production conditions. When the airflow from the production line dust removal system to the settling box is too low, the pressure inside the settling box changes from negative to positive, causing dust to overflow and failing to meet environmental standards. Conversely, when the airflow from the external dust removal system is too high, airflow is wasted when the air classifier's output decreases, increasing energy consumption. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a dust removal system for light materials with adjustable negative pressure adjustment function in a settling tank.

[0005] The dust removal system for a light material air classifier with negative pressure regulation function described in this utility model includes a fan, a gas diversion device, an air classifier separation chamber, a settling box, and a dust collector. One end of the gas diversion device is provided with an air inlet, and the other end of the gas diversion device is provided with a first diversion port and a second diversion port. The air inlet is connected to the air outlet of the fan. A dust removal pipeline is connected between the first diversion port and the dust collector. An air inlet pipeline is connected between the second diversion port and the air classifier separation chamber. The air classifier separation chamber is connected to the settling box, and a return air pipeline is connected between the settling box and the air inlet of the fan.

[0006] Furthermore, the gas diversion device includes a housing, and the air inlet, the first diversion port and the second diversion port are all disposed on the housing. Inside the housing, a diversion plate is rotatably connected at the junction of the first diversion port and the second diversion port, and the diversion plate is connected to a diversion plate drive assembly.

[0007] Furthermore, rotating sleeves are fixedly connected to both the left and right side walls of the housing, and a drive shaft is rotatably connected between the two rotating sleeves. The diverter plate is fixedly connected to the drive shaft.

[0008] Furthermore, the diverter drive assembly includes an adjustment box fixedly connected to the housing. A lead screw is rotatably connected between the top and bottom walls of the adjustment box. The lead screw passes through the adjustment box and is fixedly connected to an adjustment part. A movable nut is threaded onto the lead screw. A lifting plate is fixedly connected to the movable nut. A strip-shaped hole runs horizontally through the lifting plate. A hinge shaft is built into the strip-shaped hole. A swing arm is rotatably connected to the hinge shaft. The other end of the swing arm is fixedly connected to the drive shaft.

[0009] Furthermore, the side wall of the adjustment box has an arc-shaped hole coaxial with the drive shaft, and the hinge shaft passes through the arc-shaped hole and is threaded with a lock nut.

[0010] Furthermore, both ends of the lead screw pass through the adjustment box and are connected to an adjustment part, the diameter of which is larger than the diameter of the through hole of the lead screw in the adjustment box.

[0011] The advantages of this utility model compared with the prior art are: The dust removal system for a light material air classifier with negative pressure regulation function described in this utility model is equipped with a gas diversion device connected to the separation chamber of the air classifier. This device can adjust the magnitude of the negative pressure in the settling tank, ensuring that the settling tank always maintains a stable negative pressure state, effectively preventing solid particles from overflowing and causing pollution. At the same time, the airflow discharged by the fan is returned to the settling tank to participate in the internal circulation, thereby effectively reducing energy consumption and making it more environmentally friendly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the gas diversion device of this utility model; Figure 3 yes Figure 2 Enlarged view at point M; Figure 4 This is a partial structural schematic diagram of the gas diversion device of this utility model.

[0013] In the diagram: 1. Fan; 2. Gas diversion device; 20. Diversion plate; 21. Housing; 22. Air inlet; 23. Second diversion port; 24. First diversion port; 25. Regulating box; 26. Lead screw; 27. Adjusting part; 28. Rotating sleeve; 29. ​​Drive shaft; 210. Swing arm; 211. Arc hole; 212. Locking nut; 213. Hinge shaft; 214. Moving nut; 215. Lifting plate; 3. Air inlet duct; 4. Air separator separation chamber; 5. Settling box; 6. Return air duct; 7. Dust removal duct; 8. Dust collector. Detailed Implementation

[0014] The embodiments of this utility model will be further described below with reference to the accompanying drawings: Example 1: like Figure 1 As shown, the dust removal system for a light material air separator with negative pressure regulation function according to this utility model includes a fan 1, a gas diversion device 2, an air separator separation chamber 4, a settling box 5, and a dust collector 8. One end of the gas diversion device 2 is provided with an air inlet 22, and the other end of the gas diversion device 2 is provided with a first diversion port 24 and a second diversion port 23. The air inlet 22 is connected to the air outlet of the fan 1. A dust removal pipeline 7 is connected between the first diversion port 24 and the dust collector 8. An air inlet pipeline 3 is connected between the second diversion port 23 and the air separator separation chamber 4. The air separator separation chamber 4 is connected to the settling box 5. A return air pipeline 6 is connected between the settling box 5 and the air inlet of the fan 1.

[0015] When the air classifier is working normally, under the action of the fan 1, the gas carrying dust in the settling box 5 enters the fan 1 through the return air duct 6. Then, after being diverted by the gas diversion device 2, part of the gas enters the separation chamber 4 of the air classifier through the second diversion port 23 and the inlet air duct 3 to remove impurities from the material. The airflow after impurity removal enters the settling box 5 to settle and separate with the light material, and then enters the fan 1 again through the return air duct 6, forming an internal circulation of airflow. The other part of the gas enters the dust collector 8 through the first diversion port 24 and the dust removal duct 7 for dust removal before being discharged into the atmosphere. Due to the diversion by the gas diversion device 2, the airflow in the settling box 5 is always less than the return airflow, thus maintaining a negative pressure in the settling box 5 and effectively preventing dust from overflowing and polluting the environment. At the same time, since part of the airflow participates in the internal circulation, energy consumption is effectively reduced, making it more environmentally friendly.

[0016] When the content of the light material to be processed increases or the production demand increases, the motor frequency of blower 1 increases, and the air volume in the separation chamber 4 of the air classifier increases, which is beneficial for the removal of impurities from the material. Consequently, the air volume entering the settling box 5 increases, and blower 1 draws more air from the settling box 5, leading to an increase in the pressure difference within the settling box 5 and thus increased energy consumption of blower 1. At this point, the flow rate is adjusted by the gas diversion device 2. By increasing the flow rate through the second diversion port 23, the airflow into the settling box 5 increases, thereby reducing the negative pressure within the settling box 5 back to normal. Then, the frequency of blower 1 can be appropriately reduced to further decrease energy consumption.

[0017] Example 2: like Figures 1 to 4 As shown, based on Example 1, Furthermore, the gas diversion device 2 includes a housing 21. The air inlet 22, the first diversion port 24, and the second diversion port 23 are all disposed on the housing 21. Inside the housing 21, at the junction of the first diversion port 24 and the second diversion port 23, a diversion plate 20 is rotatably connected. The diversion plate 20 is connected to a diversion plate drive assembly. Since the air inlet 22 is divided into two parts by the diversion plate 20, the ratio of these two parts can be adjusted by driving the diversion plate 20 to rotate through the diversion plate drive assembly, thereby achieving the purpose of adjusting the diversion flow rate.

[0018] Furthermore, rotating sleeves 28 are fixedly connected to the left and right side walls of the housing 21, and a drive shaft 29 is rotatably connected between the two rotating sleeves 28. The diverter plate 20 is fixedly connected to the drive shaft 29. By rotating the drive shaft 29, the diverter plate 20 can be rotated.

[0019] Furthermore, the diverter drive assembly includes an adjustment box 25 fixedly connected to the housing 21. A lead screw 26 is rotatably connected between the top and bottom walls of the adjustment box 25. The lead screw 26 passes through the adjustment box 25 and is fixedly connected to an adjustment part 27. A movable nut 214 is threaded onto the lead screw 26. A lifting plate 215 is fixedly connected to the movable nut 214. A strip-shaped hole extends laterally through the lifting plate 215. A hinge shaft 213 is housed within the strip-shaped hole. A swing arm 210 is rotatably connected to the hinge shaft 213. The other end of the swing arm 210 is fixedly connected to the drive shaft 29. By rotating the adjustment part 27, the lead screw 26 can be rotated, thereby causing the movable nut 214 to move up and down, and further causing the lifting plate 215 to move up and down. Under the action of the strip-shaped hole and the hinge shaft 213, the swing arm 210 can be swung up and down, thereby causing the drive shaft 29 to rotate reciprocally, so as to achieve the purpose of driving the diverter 20 to flip.

[0020] Furthermore, an arc-shaped hole 211, coaxial with the drive shaft 29, is provided through the side wall of the regulating box 25. The hinge shaft 213 passes through the arc-shaped hole 211 and is threadedly connected to a locking nut 212. After the diverter plate 20 is positioned, the locking nut 212 can lock the lifting plate 215 and the swing arm 210 onto the regulating box 25, thereby preventing the diverter plate 20 from accidentally flipping over and providing a protective function.

[0021] Furthermore, both ends of the lead screw 26 pass through the adjustment box 25 and are connected to an adjustment part 27. The diameter of the adjustment part 27 is larger than the diameter of the through hole of the lead screw 26 in the adjustment box 25. The adjustment part 27 can be an adjustment nut, which facilitates rotational adjustment and can also position the lead screw 26. The structure is simple and the operation is convenient.

[0022] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A dust removal system for a light material air classifier with negative pressure regulation function, characterized in that: The system includes a fan (1), a gas diversion device (2), an air separator separation chamber (4), a settling box (5), and a dust collector (8). One end of the gas diversion device (2) is provided with an air inlet (22), and the other end of the gas diversion device (2) is provided with a first diversion port (24) and a second diversion port (23). The air inlet (22) is connected to the air outlet of the fan (1). The first diversion port (24) is connected to the dust collector (8) by a dust removal pipeline (7). The second diversion port (23) is connected to the air separator separation chamber (4) by an air inlet pipeline (3). The air separator separation chamber (4) is connected to the settling box (5). The settling box (5) is connected to the air inlet of the fan (1) by a return air pipeline (6).

2. The dust removal system for light materials with negative pressure regulation function according to claim 1, characterized in that: The gas diversion device (2) includes a housing (21), the air inlet (22), the first diversion port (24) and the second diversion port (23) are all disposed on the housing (21), and a diversion plate (20) is rotatably connected inside the housing (21) at the junction of the first diversion port (24) and the second diversion port (23), and the diversion plate (20) is connected to a diversion plate drive assembly.

3. The dust removal system for light materials with negative pressure regulation function according to claim 2, characterized in that: Rotary sleeves (28) are fixedly connected to the left and right side walls of the housing (21), and a drive shaft (29) is rotatably connected between the two rotating sleeves (28). The diverter plate (20) is fixedly connected to the drive shaft (29).

4. The dust removal system for light materials with negative pressure regulation function according to claim 3, characterized in that: The diverter drive assembly includes an adjustment box (25) fixedly connected to the housing (21). A lead screw (26) is rotatably connected between the top and bottom walls of the adjustment box (25). The lead screw (26) passes through the adjustment box (25) and is fixedly connected to an adjustment part (27). A movable nut (214) is threaded onto the lead screw (26). A lifting plate (215) is fixedly connected to the movable nut (214). A strip hole is transversely connected to the lifting plate (215). A hinge shaft (213) is built into the strip hole. A swing arm (210) is rotatably connected to the hinge shaft (213). The other end of the swing arm (210) is fixedly connected to the drive shaft (29).

5. The dust removal system for a light material air classifier with negative pressure regulation function according to claim 4, characterized in that: The side wall of the regulating box (25) has an arc-shaped hole (211) coaxial with the drive shaft (29), and the hinge shaft (213) passes through the arc-shaped hole (211) and is threaded with a lock nut (212).

6. The dust removal system for light materials with negative pressure regulation function according to claim 4, characterized in that: Both ends of the lead screw (26) pass through the adjustment box (25) and are connected to the adjustment part (27). The diameter of the adjustment part (27) is larger than the diameter of the through hole of the lead screw (26) in the adjustment box (25).

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