A light material air separator for construction or demolition waste

Abstract

This invention relates to a lightweight material air separator for construction or demolition waste, comprising a casing with a feed inlet on the top side, an air outlet on the side wall, and a discharge outlet at the bottom. A filtration mechanism is located at the air outlet, and a conveying and air-closing mechanism is located at the bottom of the casing near the discharge outlet. The innovation lies in the following: the filtration mechanism includes a flange housing, a geared motor, and a disc filter screen. The flange housing is located at the air outlet and is detachably connected to the outer wall of the casing. The disc filter screen is located at the air outlet, and the geared motor is located on the outer wall of the flange housing, with its power output shaft connected to the disc filter screen. An air outlet chamber is located in the upper part of the flange housing and communicates with an air intake on the flange housing. This invention simplifies the product structure, not only preventing the entanglement of long, thin lightweight materials but also reducing operational failure rates and manufacturing costs.

Description

Technical Field

[0001] This invention relates to an air separator, specifically an air separator for separating lightweight materials from construction waste or demolition waste. Background Technology

[0002] The lightweight material air separator of the present invention is used for separating and collecting lightweight materials (plastics, paper scraps, leaves, etc.) in construction waste or demolition waste.

[0003] The existing light material collector has a shell with three channels: a feed inlet, an exhaust inlet, and a bottom discharge outlet. A filtration mechanism is installed on the shell near the exhaust inlet, and a shut-off mechanism is located at the discharge outlet. The filtration mechanism includes a geared motor and a cylindrical filter drum driven by the geared motor. The outer circumference of the cylindrical drum is wrapped with steel mesh to filter light materials and dust. One end of the filter drum is connected to the exhaust inlet, allowing air to be drawn from inside the drum. Inside the filter drum, a fixedly installed cylindrical inner cylinder is designed. One end of the inner cylinder is connected to a blower via a steel pipe. A steel pipe on the cylindrical surface of the inner cylinder connects to a fixedly installed air blowing chamber. This air blowing chamber has an air outlet near the inner wall of the filter drum, allowing air to be blown from the inside of the filter drum in reverse order to the outside.

[0004] The specific working principle is as follows:

[0005] The airflow direction is as follows: the system is negatively ventilated through the exhaust port by the exhaust device. Since the bottom outlet is equipped with a conveying airlock mechanism, the air cannot flow through it. This means that the air enters from the inlet, passes through the filter screen of the rotating filter drum, and then flows out from the inside of the filter drum to the outlet.

[0006] The flow of light materials is as follows: light materials are driven by the wind to enter the system tangentially from the inlet. Under the action of the inertial force of the light materials, they flow towards the bottom outlet, and most of them enter the conveying airlock mechanism and are then discharged. A small portion of light materials will adhere to the outside of the filter screen of the filter drum under the action of the wind. Since the filter drum is rotating continuously and there is a blowing chamber in a fixed position inside the drum blowing air from the inside of the drum to the outside, when the light materials adhering to the outside of the drum rotate to the blowing position, they are blown away from the filter screen by the reverse wind and enter the bottom conveying airlock mechanism to be discharged from the system.

[0007] The disadvantages of this structure are as follows: Disadvantage 1: Since the filter drum is designed to rotate automatically, and there is also a fixed inner cylinder and air blowing chamber inside the drum, the air duct needs to enter the inner cylinder from the air outlet. This means that one end of the filter drum not only needs to be designed with a mounting shaft that is movably connected to the outside of the shell, but also needs to be designed with a roller that is movably connected to the inner cylinder. At the same time, in order to avoid leaving the inner cylinder and air duct, the other end of the drum needs to be designed as a hollow structure and supported by 8 rollers, making the whole system more complex and resulting in a higher failure rate and production cost.

[0008] Disadvantage 2: Because the exhaust port draws air from inside one end of the drum, the airflow speed at the outlet end of the filter drum is faster and slower at the other end. This causes light materials to accumulate at the outlet end of the drum under the influence of the airflow, which increases the difficulty of cleaning the filter screen by reverse blowing and reduces the filter screen's filtration efficiency.

[0009] Disadvantage 3: The cylindrical shape of the filter roller poses a risk to some lightweight materials, such as long strips of lightweight materials, including yarn, long strips of cloth, and long plastic films. If these materials are wrapped around the outside of the roller for more than one turn, they will become firmly wrapped around the roller and cannot be removed by reverse air blowing. They must be removed manually during maintenance, which reduces work efficiency and maintenance difficulty. Summary of the Invention

[0010] The purpose of this invention is to provide a lightweight material air separator for construction or demolition waste that simplifies the product structure, avoids the entanglement of long, thin lightweight materials, and reduces the failure rate and manufacturing cost.

[0011] To achieve the above objectives, the technical solution of the present invention is: a light material air separator for construction waste or demolition waste, comprising a casing, a filtering mechanism, and a conveying and air-closing mechanism. The casing has a feed inlet on its top side, an air outlet on its side wall, and a discharge outlet at its bottom. The internal space of the casing is a material discharge chamber. A filtering mechanism is provided at the air outlet of the casing, and a conveying and air-closing mechanism is provided at the bottom of the casing, located at the discharge outlet. Its innovation lies in:

[0012] The filtration mechanism includes a flange housing, a geared motor, and a disc filter. The flange housing is located at the air outlet and is detachably connected to the outer wall of the housing. The disc filter is located at the air outlet of the housing and is rotatably engaged with the air outlet. The geared motor is located on the outer wall of the flange housing, and its power output shaft is drively connected to the disc filter.

[0013] The upper part of the flange housing has an air outlet chamber, which is connected to the air intake provided on the flange housing.

[0014] In the above technical solution, a bushing is provided at the center of the flange housing, and a transmission shaft is provided on the power output shaft of the geared motor. The transmission shaft is located inside the bushing, and the free end of the transmission shaft is connected to the disc filter screen. The air outlet chamber inside the flange housing is a fan-shaped air outlet chamber formed by partition plates. The two ends of the partition plates are fixedly connected to the inner wall of the flange housing and the outer wall of the bushing.

[0015] In the above technical solution, the filtration mechanism further includes a filter element reinforcing frame, which includes a reinforcing bushing located at the center of the outer side of the disc filter screen, and reinforcing ribs evenly arranged along the circumference of the reinforcing bushing and fixed to the disc filter screen. The power output shaft of the geared motor is provided with a transmission shaft, and the disc filter screen and the reinforcing bushing are simultaneously fitted onto the free end of the transmission shaft.

[0016] The above technical solution also includes a reverse blowing mechanism, which includes a fan. The lower part of the flange housing also has a blowing channel that is separated from the air outlet chamber. The flange housing is provided with an air outlet that communicates with the blowing channel. The outer wall of the flange housing is provided with a reverse blowing inlet. The air outlet of the fan is connected to the blowing channel through the reverse blowing inlet.

[0017] In the above technical solution, the reverse blower mechanism further includes an air inlet filter frame, which is located at the air inlet of the blower.

[0018] The above technical solution also includes a filter cleaning mechanism located at the bottom of the disc filter screen. The filter cleaning mechanism includes a scraper, a roller brush, and a roller brush seat. The scraper is arranged vertically on the inner side of the disc filter screen. The two ends of the roller brush seat are fixedly connected to the inner wall of the housing and the scraper, respectively. The roller brush is rotatably supported on the roller brush seat, and the two ends of the roller brush are rotatably connected to the inner wall of the housing and the scraper.

[0019] The above technical solution also includes a light material pre-filtration mechanism located near the disc filter screen. The light material pre-filtration mechanism includes a filter element support and a primary filter element. The filter element support is located in the material discharge chamber of the housing. The primary filter element is installed on the filter element support and is located in the lower middle part of the material discharge chamber and near the discharge port.

[0020] In the above technical solution, the conveying airlock mechanism includes a conveying airlock duct, an airlock impeller, and a drive motor. The conveying airlock duct is located at the bottom of the machine casing and at the discharge port, and the inner cavity of the conveying airlock duct is connected to the discharge chamber. The airlock impeller is located inside the conveying airlock duct and is rotatably connected to it via a rotating shaft. The drive motor is located on the outer wall of the conveying airlock duct, and the power output shaft of the drive motor is connected to the transmission shaft.

[0021] In the above technical solution, the flange housing includes an annular cover, a fan-shaped inner plate, and a sealing plate. The fan-shaped inner plate is located on the lower inner side of the annular cover, and the sealing plate is located on the outer side of the annular cover. The two partition plates and the fan-shaped inner plate inside the flange housing divide the interior of the flange housing into an upper fan-shaped air outlet chamber and a lower semi-enclosed chamber. A flange is provided on the outer wall of the housing and around the air outlet. The connecting flange provided on the annular cover is detachably connected to the flange of the housing by fasteners. The sealing plate is provided with an air intake, and the periphery of the air intake is provided with a flange edge that cooperates with the air intake device.

[0022] In the above technical solution, the casing is generally in the shape of a volute, and an arc-shaped guide plate is provided in the material discharge chamber near the feed inlet, and observation windows are provided on both sides of the casing.

[0023] The positive effects of this invention are as follows: When using the air separator for lightweight materials in construction or demolition waste according to this invention, the filtration mechanism includes a flange housing, a geared motor, and a disc filter screen. The flange housing is located at the air outlet and is detachably connected to the outer wall of the casing. The disc filter screen is located at the air outlet of the casing and rotates with the air outlet. The geared motor is located on the outer wall of the flange housing, and its power output shaft is connected to the disc filter screen via a transmission connection.

[0024] The upper part of the flange housing has an air outlet chamber, and the air outlet chamber is connected to the air intake provided on the flange housing.

[0025] This invention replaces the existing drum-type filter structure with a disc-type filter screen, and the upper air outlet chamber inside the flange housing allows for airflow through the main air duct. The working principle of this invention is as follows:

[0026] The airflow direction is as follows: the exhaust device is connected to the suction port on the flange housing. Using the exhaust device, negative pressure is applied to the material discharge chamber inside the machine housing through the suction port. Because a conveying airlock mechanism is installed at the bottom discharge port, air cannot flow directly from the discharge port. This results in air entering from the inlet, and the dust-laden gas, after being filtered by the disc filter, flowing out through the air outlet of the machine housing, the air outlet chamber of the flange housing, and the suction port.

[0027] The flow of light materials is as follows: Driven by the wind, the light materials enter the machine casing tangentially from the feed inlet. Under the action of the inertial force of the light materials, they flow towards the bottom discharge outlet, and most of them enter the conveying airlock mechanism for discharge. A small portion of the light materials adheres to the upper part of the disc filter screen under the action of the wind. Since there is no wind flow from the lower part of the flange housing, the light materials change from having an adsorption force to no adsorption force during the process of moving from the upper part of the disc filter screen to the lower part. Under the action of their own weight, they tend to fall. The light materials can detach from the screen and enter the bottom conveying airlock mechanism under the action of the wind and their own weight, and are discharged from the machine casing, thus completing the air separation of light materials.

[0028] The advantages of this invention are as follows: First, by using a disc filter screen to replace the existing drum filter element structure, the structure is simplified, saving components such as the inner cylinder and air blowing chamber. It also avoids the hollow end structure formed by the inner sleeve, outer circumference, and eight rollers of the drum, greatly simplifying the product structure and reducing operational failure rate and manufacturing cost. Second, the upper part of the flange housing of this invention has an air outlet chamber, which is connected to the air inlet on the flange housing. Therefore, the upper part of the flange housing is ventilated while the lower part is not, preventing uneven airflow and preventing the accumulation of light materials. This fully and effectively utilizes the filtering effect of the disc filter screen. Furthermore, when light materials adhering to the disc filter screen rotate to the lower part of the flange housing, they change from having an adsorption force to no adsorption force and can fall into the conveying and shut-off mechanism under their own gravity for discharge. Moreover, compared to the traditional drum filter element structure, the disc filter screen structure of this invention can avoid the entanglement of long strips of light materials, reducing the failure rate. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural schematic diagram of a specific embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A schematic diagram of the structure after removing the sealing plate and one side panel of the casing;

[0031] Figure 3 yes Figure 2 A left-view diagram;

[0032] Figure 4 yes Figure 3 A diagram showing the view from the right.

[0033] Figure 5 This is a schematic diagram of the assembly structure of the disc filter and filter cleaning mechanism of the present invention;

[0034] Figure 6 yes Figure 5 Another view from the opposite direction;

[0035] Figure 7This is a three-dimensional structural diagram of the flange cover after the sealing plate is removed;

[0036] Figure 8 This is a schematic diagram of the three-dimensional structure of the casing of the present invention. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and the given embodiments, but is not limited thereto.

[0038] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, and 8, a lightweight material air separator for construction or demolition waste includes a housing 1, a filtering mechanism 2, and a conveying and air-closing mechanism 6. The housing 1 has a feed inlet 11 on its top side, an air outlet 12 on its side wall, and a discharge outlet 13 at its bottom. The internal space of the housing 1 is a material discharge chamber. The filtering mechanism 2 is located at the air outlet 12 of the housing 1, and the conveying and air-closing mechanism 6 is located at the bottom of the housing 1, near the discharge outlet 13.

[0039] The filtration mechanism 2 includes a flange housing 21, a geared motor 22, and a disc filter 23. The flange housing 21 is located at the air outlet 12 and is detachably connected to the outer wall of the housing 1. The disc filter 23 is located at the air outlet 12 of the housing 1 and is rotatably engaged with the air outlet 12. The geared motor 22 is located on the outer wall of the flange housing 21, and the power output shaft of the geared motor 22 is connected to the disc filter 23 for transmission.

[0040] The upper part of the flange housing 21 has an air outlet chamber 211, and the air outlet chamber 211 is connected to the air intake port 212 provided on the flange housing 21.

[0041] like Figure 2 , 6 As shown, to facilitate the rotation of the disc filter and simplify the rotating structure, a bushing 213 is provided at the center of the flange housing 21. A transmission shaft 221 is provided on the power output shaft of the geared motor 22, which is located inside the bushing 213. The free end of the transmission shaft 221 is connected to the disc filter 23. The air outlet chamber 211 inside the flange housing 21 is a fan-shaped air outlet chamber formed by partition plates 214. Both ends of the partition plates 214 are fixedly connected to the inner wall of the flange housing 21 and the outer wall of the bushing 213. During operation, the geared motor 22 is driven, and the transmission shaft drives the disc filter 23 to rotate, resulting in air outlet from the fan-shaped air outlet chamber.

[0042] like Figure 6As shown, in order to enhance the strength of the filter element, the filter mechanism 2 also includes a filter element reinforcing frame 24. The filter element reinforcing frame 24 includes a reinforcing bushing 241 located at the center of the outer side of the disc filter screen 23, and reinforcing ribs 242 evenly arranged along the circumference of the reinforcing bushing 241 and fixed on the disc filter screen 23. The power output shaft of the geared motor 22 is provided with a transmission shaft 221. The disc filter screen 23 and the reinforcing bushing 241 are simultaneously fitted onto the free end of the transmission shaft 221.

[0043] like Figure 7 As shown, the upper part of the flange housing 21 is an air outlet, while the lower part is not. When the filter screen rotates to the air outlet chamber of the upper half of the flange housing 21, it can draw out the gas inside the housing 1. When the filter screen continues to rotate to the lower half of the flange housing 21, it changes from having an adsorption force to having no adsorption force. In order to make the light material on the filter screen fall into the material discharge chamber, the present invention also includes a reverse blower mechanism 3. The reverse blower mechanism 3 includes a blower 31. The lower part of the flange housing 21 also has a blower channel 215 that is separated from the air outlet chamber 211. The flange housing 21 is provided with a blower port 216 that communicates with the blower channel 215. The outer wall of the flange housing 21 is provided with a reverse blower inlet. The air outlet of the blower 31 is connected to the blower channel 215 through the reverse blower inlet. Therefore, the present invention uses the reverse blowing mechanism 3 to blow air in the reverse direction on the lower half of the disc filter screen 23, so that the light material adhering to the filter screen is blown off and the light material does not accumulate. The filtering effect of the disc filter screen is fully and effectively utilized, and the material can fall into the material discharge chamber under its own gravity and then be discharged through the conveying and air-closing mechanism.

[0044] like Figure 2 As shown, in order to filter the incoming air of the reverse blower, the reverse blower mechanism 3 also includes an air inlet filter frame 32, which is located at the air inlet of the blower 31.

[0045] like Figure 5 As shown, to clean the filter screen and prevent excessive light substances from adhering to it and affecting airflow, a filter screen cleaning mechanism 4 is included at the bottom of the disc filter screen 23. The filter screen cleaning mechanism 4 includes a scraper 41, a roller brush 42, and a roller brush seat 43. The scraper 41 is arranged vertically on the inner side of the disc filter screen 23. The two ends of the roller brush seat 43 are fixedly connected to the inner wall of the housing 1 and the scraper 41, respectively. The roller brush 42 is rotatably supported on the roller brush seat 43, and its two ends are rotatably connected to the inner wall of the housing 1 and the scraper 41. The scraper 41 can scrape off light substances adhering to the filter screen, while the roller brush 42 can clean the screen holes and prevent screen clogging.

[0046] like Figure 2 , 8As shown, in order to perform primary filtration of light materials entering the housing 1 and improve the effect of the disc filter, the present invention also includes a light material pre-filtration mechanism 5 disposed near the disc filter 23. The light material pre-filtration mechanism 5 includes a filter element support 51 and a primary filter element 52. The filter element support 51 is disposed in the material discharge chamber of the housing 1, and the primary filter element 52 is mounted on the filter element support 51 and is located in the lower middle part of the material discharge chamber and near the discharge port 13.

[0047] like Figure 1 , 2 As shown in Figures 3 and 4, to block the airflow and prevent air from flowing towards the discharge port, the conveying airlock mechanism 6 includes a conveying airlock duct 61, an airlock impeller 62, and a drive motor 63. The conveying airlock duct 61 is located at the bottom of the housing 1 and at the discharge port 13, and its inner cavity is connected to the material discharge chamber. The airlock impeller 62 is located inside the conveying airlock duct 61 and is rotatably connected to it via a rotating shaft. The drive motor 63 is located on the outer wall of the conveying airlock duct 61, and its power output shaft is connected to the transmission shaft. The airlock impeller 62 is tightly fitted to the inner wall of the conveying airlock duct 61. The drive motor 63 drives the airlock impeller 62 to rotate in a directional manner. Light materials enter the conveying airlock duct from the discharge port. During rotation, the airlock impeller 62 conveys the light materials outward through the grid in the middle of the blades, but it can block the airflow and prevent air from entering the equipment from the discharge port.

[0048] like Figure 1 , 7 As shown, in order to make the filter structure of the present invention more compact and simple, and to reduce production costs and failure rate, the flange housing 21 includes an annular cover 21a, a fan-shaped inner plate 21b, and a sealing plate 21c. The fan-shaped inner plate 21b is located on the lower inner side of the annular cover 21a, and the sealing plate 21c is located on the outer side of the annular cover 21a. The two partition plates 214 and the fan-shaped inner plate 21b inside the flange housing 21 divide the interior of the flange housing 21 into an upper fan-shaped air outlet chamber and a lower semi-closed chamber. A flange 14 is provided on the outer wall of the housing 1 and around the air outlet 12. The connecting flange 21aa of the annular cover 21a is detachably connected to the flange 14 of the housing 1 by fasteners. An air intake 212 is provided on the sealing plate 21c, and a flange edge 21cc is provided around the air intake 212 to cooperate with the air intake device. Therefore, it can be seen that the air outlet chamber of the flange housing 21 of the present invention is a fan-shaped air outlet chamber with a design of slightly larger than 180°. The fan-shaped inner plate 21b and the filter element reinforcing skeleton 24, which are complementary to the fan-shaped air outlet chamber, are closely fitted together. Multiple reinforcing ribs 242 distributed in a circle divide the air outlet chamber into several fan-shaped cavities. The air outlet is connected to the air outlet chamber to allow the main air duct to flow. The lower part of the flange housing 21 does not allow the air duct to flow.

[0049] like Figure 4 , 8 As shown, light materials, driven by the wind, enter the machine housing from the feed inlet along the tangential direction of the guide plate 15. Under the inertial force of the light materials, they flow towards the bottom discharge outlet. The machine housing 1 has an overall volute-shaped structure, and its discharge chamber is equipped with an arc-shaped guide plate 15 near the feed inlet 11. Observation windows 16 are provided on both sides of the machine housing 1. The top of the machine housing 1 is equipped with multiple lifting lugs for easy subsequent hoisting.

[0050] The working process of this invention is as follows: The airflow direction is as follows: The exhaust device is connected to the suction port 212 on the flange housing 21. Using the exhaust device, negative pressure is applied to the material discharge chamber inside the housing 1 through the suction port 212. Since the conveying airlock mechanism 6 is installed at the bottom discharge port 13, the air cannot flow from the discharge port 13. That is, the dust-laden gas that has been filtered by the disc filter after the light material enters from the inlet 11 flows out through the air outlet 12 of the housing 1, the air outlet chamber 211 of the flange housing 21, and the suction port 212.

[0051] The flow of light materials is as follows: Driven by the wind, the light materials enter the machine casing 1 from the inlet 11 and along the tangential direction of the guide plate 15. Under the inertial force of the light materials, they flow towards the bottom outlet 13, with most of them directly entering the conveying airlock duct 61. The drive motor 63 drives the airlock impeller 62 to rotate, and the material is discharged under the influence of the airlock impeller 62. A small portion of the light materials adheres to the upper part of the disc filter 23 under the action of the wind. Since there is no wind flow from the lower part of the flange casing 21, the light materials... As the disc filter 23 moves from the upper part to the lower part, it changes from having an adsorption force to having no adsorption force. Under its own weight, it tends to fall. In addition, with the action of the reverse blower mechanism at this position, the air filtered by the inlet filter frame 32 enters the air inlet of the blower 31, then enters the blowing channel 215 through the air outlet, and finally blows onto the disc filter 23 through the air outlet 216. This causes the light material adhering to the disc filter 23 to quickly detach and enter the bottom conveying and shut-off mechanism 6 under the action of wind force and its own weight, and is discharged outside the casing, thus completing the air separation of light material.

[0052] While drawing air, the filter cleaning mechanism 4 can clean the disc filter 23 in real time. The scraper 41 can scrape off light substances adhering to the filter, while the roller brush 42 can clean the screen holes and prevent the screen from clogging.

[0053] The advantages of this invention are as follows: First, by using a disc filter screen instead of the existing drum filter element structure, the structure is simplified, saving components such as the inner cylinder and air blowing chamber. It also avoids the hollow end structure formed by the inner sleeve, outer circumference, and eight rollers of the drum, greatly simplifying the product structure and reducing operational failure rate and manufacturing costs. Second, the upper part of the flange housing of this invention has an air outlet chamber, which is connected to the air intake port on the flange housing. Therefore, the upper part of the flange housing is ventilated while the lower part is not, preventing uneven airflow. This design prevents the accumulation of light materials, fully and effectively utilizing the filtration function of the disc filter. Furthermore, when light materials adhering to the disc filter rotate to the lower part of the flange housing, they transition from adsorption to non-adsorption, allowing them to fall into the conveying and air-closing mechanism under their own gravity and be discharged. Compared to traditional drum filter structures, the disc filter structure of this invention avoids the entanglement of long, thin light materials, reducing the failure rate. Thirdly, the filter cleaning mechanism added to this invention can clean the disc filter in real time, preventing excessive accumulation of light materials that could affect the filtration effect.

[0054] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A lightweight material air separator for construction waste or demolition waste, comprising a housing (1), a filtering mechanism (2), and a conveying and air-closing mechanism (6), wherein the housing (1) has a feed inlet (11) on its top side, an air outlet (12) on its side wall, and a discharge outlet (13) at its bottom; the internal space of the housing (1) is a material discharge chamber; the filtering mechanism (2) is provided at the air outlet (12) of the housing (1); and the conveying and air-closing mechanism (6) is provided at the bottom of the housing (1) and at the discharge outlet (13), characterized in that: The filtration mechanism (2) includes a flange housing (21), a geared motor (22), and a disc filter (23). The flange housing (21) is located at the air outlet (12) and is detachably connected to the outer wall of the housing (1). The disc filter (23) is located at the air outlet (12) of the housing (1) and is rotatably engaged with the air outlet (12). The geared motor (22) is located on the outer wall of the flange housing (21), and the power output shaft of the geared motor (22) is connected to the disc filter (23) for transmission. The upper part of the flange housing (21) has an air outlet chamber (211), and the air outlet chamber (211) is connected to the air intake (212) provided on the flange housing (21). The flange housing (21) includes an annular cover (21a), a fan-shaped inner plate (21b), and a sealing plate (21c). The fan-shaped inner plate (21b) is located on the lower inner side of the annular cover (21a), and the sealing plate (21c) is located on the outer side of the annular cover (21a). The two partition plates (214) and the fan-shaped inner plate (21b) inside the flange housing (21) divide the interior of the flange housing (21) into an upper fan-shaped air outlet chamber and a lower semi-enclosed chamber. It also includes a reverse blowing mechanism (3), which includes a fan (31). The lower part of the flange housing (21) also has a blowing channel (215) that is separated from the air outlet chamber (211). The flange housing (21) is provided with an air outlet (216) that communicates with the blowing channel (215). The outer wall of the flange housing (21) is provided with a reverse blowing inlet. The air outlet of the fan (31) is connected to the blowing channel (215) through the reverse blowing inlet. It also includes a light material pre-filtration mechanism (5) located near the disc filter (23). The light material pre-filtration mechanism (5) includes a filter element support (51) and a primary filter element (52). The filter element support (51) is located in the material discharge chamber of the housing (1). The primary filter element (52) is installed on the filter element support (51) and is located in the lower middle part of the material discharge chamber and near the discharge port (13).

2. The air separator for lightweight materials in construction waste or demolition waste according to claim 1, characterized in that: A bushing (213) is provided at the center of the flange housing (21), and a transmission shaft (221) is provided on the power output shaft of the geared motor (22). The transmission shaft (221) is located inside the bushing (213), and the free end of the transmission shaft (221) is connected to the disc filter (23). The air outlet chamber (211) inside the flange housing (21) is a fan-shaped air outlet chamber formed by partition plates (214). The two ends of the partition plates (214) are fixedly connected to the inner wall of the flange housing (21) and the outer wall of the bushing (213).

3. The air separator for lightweight materials in construction waste or demolition waste according to claim 1, characterized in that: The filter mechanism (2) further includes a filter element reinforcing frame (24), which includes a reinforcing bushing (241) located at the center of the outer side of the disc filter (23) and reinforcing ribs (242) evenly arranged along the circumference of the reinforcing bushing (241) and fixed on the disc filter (23). The power output shaft of the geared motor (22) is provided with a transmission shaft (221), and the disc filter (23) and the reinforcing bushing (241) are rotatably connected to the free end of the transmission shaft (221).

4. The air separator for lightweight materials in construction waste or demolition waste according to claim 1, characterized in that: The reverse blower mechanism (3) also includes an air inlet filter frame (32), which is located at the air inlet of the blower (31).

5. The air separator for lightweight materials in construction waste or demolition waste according to claim 1, characterized in that: It also includes a filter cleaning mechanism (4) located at the bottom of the disc filter (23). The filter cleaning mechanism (4) includes a scraper (41), a roller brush (42) and a roller brush seat (43). The scraper (41) is arranged vertically on the inner side of the disc filter (23). The two ends of the roller brush seat (43) are fixedly connected to the inner wall of the housing (1) and the scraper (41) respectively. The roller brush (42) is rotatably supported on the roller brush seat (43), and the two ends of the roller brush (42) are rotatably connected to the inner wall of the housing (1) and the scraper (41).

6. The air separator for lightweight materials in construction waste or demolition waste according to claim 1, characterized in that: The conveying airlock mechanism (6) includes a conveying airlock duct (61), an airlock impeller (62), and a drive motor (63). The conveying airlock duct (61) is located at the bottom of the housing (1) and at the discharge port (13). The inner cavity of the conveying airlock duct (61) is connected to the discharge chamber. The airlock impeller (62) is located inside the conveying airlock duct (61) and is rotatably connected to it via a rotating shaft. The drive motor (63) is located on the outer wall of the conveying airlock duct (61), and the power output shaft of the drive motor (63) is connected to the transmission shaft.

7. The air separator for lightweight materials in construction waste or demolition waste according to claim 1, characterized in that: A flange (14) is provided on the outer wall of the housing (1) and around the air outlet (12). The connecting flange (21aa) of the annular cover (21a) is detachably connected to the flange (14) of the housing (1) by fasteners. An air intake (212) is provided on the sealing plate (21c), and a flange edge (21cc) is provided around the air intake (212) to cooperate with the air intake device.

8. The air separator for lightweight materials in construction waste or demolition waste according to claim 1, characterized in that: The casing (1) has a volute-like structure, and an arc-shaped guide plate (15) is provided in the material discharge chamber near the feed inlet (11). Observation windows (16) are provided on both sides of the casing (1).

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