A municipal sewage treatment plant biological pool MBBR filler screening device

Abstract

The application relates to a municipal sewage treatment plant biological pool MBBR filler screening device, and relates to the technical fields of sewage treatment and material screening, which comprises a screening mechanism for separating fillers and silt, one side of the screening mechanism is provided with a drying and conveying mechanism for conveying and drying the fillers, the screening mechanism is communicated with the drying and conveying mechanism, a driving mechanism is arranged outside the screening mechanism and is in transmission connection with the screening mechanism, and a material collecting hopper for collecting the fillers is arranged at the discharging end of the drying and conveying mechanism; the fillers are separated from the silt by the screening mechanism, the separated fillers are conveyed by the drying and conveying mechanism and are naturally dried, finally fall into the material collecting hopper, and the separated silt is collected and discharged, so that continuous and automatic operation is realized; the device has the functions of integrated screening, conveying and drying, manual intervention is reduced, continuous operation avoids filler accumulation, the fillers are protected during the treatment process, mechanical damage to the fillers is avoided, the service life of the fillers is prolonged, the loss of the fillers is reduced, and the operation cost is reduced.

Description

Technical Field

[0001] This application relates to the fields of wastewater treatment and material screening technology, and in particular to a screening device for MBBR packing material in a municipal wastewater treatment plant biological pool. Background Technology

[0002] Municipal wastewater treatment plants widely adopt moving bed biofilm reactor (MBBR) technology, which uses MBBR packing material suspended in wastewater as a biofilm carrier to improve wastewater treatment efficiency. However, during the cleaning process of the biological tank, the MBBR packing material mixes with sludge, and traditional cleaning methods are difficult to separate the two efficiently, resulting in severe wear and tear of the MBBR packing material and increased operating costs.

[0003] Therefore, with the increasing demand for MBBR packing material recycling in the industry, there is an urgent need to develop a screening device for MBBR packing material in biological tanks of municipal wastewater treatment plants, so as to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] To address the deficiencies in the aforementioned technologies, this application provides a screening device for MBBR packing material in a municipal wastewater treatment plant's biological pool.

[0005] This application provides a screening device for MBBR (Biological Bleach Reactor) packing material in a municipal wastewater treatment plant, which adopts the following technical solution: A screening device for MBBR (Biological Bioreactor) packing material in a municipal wastewater treatment plant includes a screening mechanism for separating packing material and silt. A conveying mechanism for conveying and drying the packing material is provided on one side of the screening mechanism. The screening mechanism is connected to the conveying mechanism. A driving mechanism is provided outside the screening mechanism and is connected to the screening mechanism in a transmission manner. A hopper for collecting the packing material is provided at the discharge end of the conveying mechanism.

[0006] Beneficial effects: The screening mechanism separates the filler from the mud and sand. The separated filler is conveyed by the drying mechanism and naturally dried before falling into the collection hopper. The separated mud and sand are collected and discharged. The screening mechanism supports and fixes the drive mechanism, which provides power to the screening mechanism, enabling continuous automated operation.

[0007] In one optional embodiment, the screening mechanism includes support columns, with screening boxes mounted on four support columns. A feed pipe is mounted on the top of each screening box, and a mud discharge pipe is vertically mounted on the bottom of each screening box. A discharge port is located on the side of each screening box away from the feed pipe. A first rotating shaft and a second rotating shaft are rotatably mounted inside the screening box. A conveyor belt is driven along the first and second rotating shafts. The conveyor belt has multiple guide plates and screen holes. The first rotating shaft is drivenly connected to the drive mechanism. A vibration component and an anti-clogging component are mounted inside the conveyor belt to facilitate unobstructed discharge. The vibration component is drivenly connected to the first rotating shaft, and the anti-clogging component is drivenly connected to the vibration component.

[0008] Beneficial effects: The drive mechanism drives the first rotating shaft to rotate, the guide plate pushes the packing to move towards the discharge port, the screen holes filter mud and sand, the conveyor belt dynamically screens and improves the mud and sand separation effect, the mud and sand fall into the bottom of the screening box and are discharged through the mud discharge pipe, the vibration component prevents the screen holes from clogging, the anti-clogging component assists in smooth mud discharge, and the dual protection of the vibration component and the anti-clogging component extends the continuous operation time of the device.

[0009] In one optional embodiment, the inner wall of the screening box is provided with a plurality of nozzles facing the direction of the conveyor belt, and the side wall of the screening box is provided with a water pipe, which is connected to the plurality of nozzles and a water tank respectively, and the water tank is located on the outside of the screening box.

[0010] Beneficial effects: The nozzles wash the packing material on the conveyor belt, remove residual mud and sand and prevent screen clogging, avoid sludge caking, accelerate the separation efficiency of packing material and mud and sand, and maintain screening efficiency.

[0011] In one optional embodiment, the drying and conveying mechanism includes a discharge pipe, which is inclinedly disposed on one side of the discharge port. A rotating shaft is rotatably disposed inside the discharge pipe, and a spiral pusher is disposed on the rotating shaft. The feed inlet on the lower side of the discharge pipe is connected to the discharge port through a feed pipe. A driving member is disposed on the higher side of the discharge pipe, and the driving member is connected to the rotating shaft. A guide pipe is disposed at the bottom of the higher side of the discharge pipe, and a collection hopper is disposed below the guide pipe.

[0012] Beneficial effects: The spiral pusher plate prolongs the retention time of the packing, accelerates the drainage of the packing, reduces the presence of moisture, and provides convenience for subsequent processing of the packing.

[0013] In one optional embodiment, the screening box is further provided with a receiving assembly for transferring the filler. The receiving assembly includes a guide block for being pressed by the guide plate. A limiting groove is formed in the guide block. A receiving plate is hinged in the limiting groove. A buffer spring is provided between the bottom of the receiving plate and the limiting groove.

[0014] Beneficial effects: The packing enters the feed pipe from the receiving plate. The guide plate continues to move and impacts the receiving plate. The receiving plate does not interfere with the guide plate when it is pressed down. Before the next guide plate arrives, the receiving plate rebounds under the action of the buffer spring, pushing the packing into the feed pipe. The buffer spring absorbs the impact force, and the receiving plate guides the packing to slide into the discharge port. The buffer structure reduces collision damage and prevents packing breakage to a certain extent.

[0015] In one optional embodiment, the oscillation assembly includes a plurality of third rotating shafts, the two ends of which are rotatably disposed on the side wall of the screening box, the middle of which passes through the conveyor belt, two adjacent third rotating shafts being connected by belt drive, one end of the third rotating shaft closer to the first rotating shaft extending out of the screening box and being connected to the first rotating shaft by belt drive, and a first cam acting on the conveyor belt is disposed in the middle of the third rotating shaft.

[0016] Beneficial effects: The first rotating shaft drives the third rotating shaft to rotate via a belt. The first cam rotates with the third rotating shaft and periodically lifts the conveyor belt, generating vibration to prevent the screen holes from clogging. Vibration is achieved using the main driving force, requiring no additional energy.

[0017] In one optional embodiment, the anti-clogging component includes a movable box and a second cam. The two movable boxes are symmetrically arranged on both sides of the conveyor belt. The movable boxes are vertically slidably arranged on the inner wall of the screening box. The movable box has a clearance groove on the side facing the conveyor belt to avoid the first rotating shaft. An arc plate is slidably arranged inside the movable box. The arc plate is connected to the top of the movable box by a plurality of tension springs. The second cam is symmetrically arranged at both ends of the third rotating shaft near the first rotating shaft. The second cam is movably arranged inside the movable box. The bottom of the two movable boxes is respectively provided with a fixed frame. A piston column for piston movement in the mud discharge pipe is fixedly arranged between the two fixed frames.

[0018] Beneficial effects: The third rotating shaft drives the second cam to rotate, the second cam lifts the moving box, and at the same time the avoidance groove avoids the third rotating shaft. The arc plate buffers the impact between the second cam and the moving box. The fixed frame at the bottom of the moving box is linked to the piston column, so that the piston column moves up and down in the mud discharge pipe. The piston column actively clears the mud discharge pipe and a single power source synchronously controls the vibration and mud discharge movement.

[0019] In one alternative embodiment, the cross-sectional dimension of the piston rod is smaller than that of the mud discharge pipe, and the bottom of the piston rod has a frustum structure.

[0020] Beneficial effects: When the piston rod moves up and down, its truncated cone structure pushes the mud away. The gap design between the piston rod and the mud discharge pipe avoids mud splashing. The truncated cone structure guides the mud to flow in a specific direction. The gap design prevents the pipe from being sealed too tightly.

[0021] In one optional embodiment, the bottom surface of the discharge pipe is provided with a water passage hole, and a liquid collection tank is fixedly provided at the bottom of the discharge pipe below the water passage hole. The liquid collection tank is connected to the sludge discharge pipe through the liquid collection pipe.

[0022] Beneficial effects: The water passage hole enables efficient collection of drained water, the liquid collection tank avoids liquid dripping and contamination, and the liquid collection pipe simplifies the wastewater discharge path.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. Fully automated process: From screening, rinsing, anti-clogging to drying and collection, it achieves unattended operation; 2. Low failure rate: The design of vibration, mechanical unblocking, and cleaning significantly reduces the risk of blockage; 3. Efficient resource utilization: Water resources are recycled and filler materials are recovered without damage, reducing operating costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure provided in the embodiments of this application; Figure 2 This is a schematic diagram of the overall cross-sectional structure provided in the embodiments of this application; Figure 3 This is a schematic cross-sectional view of the screening box provided in an embodiment of this application; Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Screening mechanism; 11. Support column; 12. Screening box; 121. Nozzle; 122. Water pipe; 123. Water tank; 13. Feed pipe; 14. Sludge discharge pipe; 15. Discharge port; 16. First rotating shaft; 17. Second rotating shaft; 18. Conveyor belt; 181. Guide plate; 19. Vibration assembly; 191. Third rotating shaft; 192. Belt; 193. First cam; 20. Anti-clogging assembly; 201. Moving box; 202. Clearance groove 203. Arc plate; 204. Tension spring; 205. Fixing frame; 206. Piston column; 207. Second cam; 21. Receiving assembly; 211. Guide block; 212. Limiting groove; 213. Receiving plate; 214. Buffer spring; 3. Drying and conveying mechanism; 31. Discharge pipe; 32. Rotating shaft; 33. Spiral pusher; 34. Feed pipe; 35. Driving component; 36. Guide pipe; 37. Liquid collection tank; 38. Liquid collection pipe; 4. Driving mechanism; 5. Collection hopper. Detailed Implementation

[0026] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0030] The present invention provides the following embodiments: Example 1

[0031] This application discloses a screening device for MBBR packing material in a municipal wastewater treatment plant's biological reactor, referring to... Figure 1 The system includes a screening mechanism 1 for separating filler and silt, a conveying mechanism 3 for conveying and drying filler is provided on one side of the screening mechanism 1, the screening mechanism 1 is connected to the conveying mechanism 3, a driving mechanism 4 is provided outside the screening mechanism 1, the driving mechanism 4 is connected to the screening mechanism 1 in a transmission manner, and a hopper 5 for collecting filler is provided at the discharge end of the conveying mechanism 3.

[0032] The working principle and beneficial effects of the above technical solution are as follows: the screening mechanism 1 separates the filler from the mud and sand. The separated filler is conveyed by the drying mechanism 3 and naturally dried, and finally falls into the collection hopper 5. The separated mud and sand are collected and discharged. The screening mechanism 1 supports and fixes the drive mechanism 4. The drive mechanism 4 provides power to the screening mechanism 1 to realize continuous automated operation. In this application, the drive mechanism 4 is a motor. This device has integrated screening, conveying and drying functions, reduces manual intervention, and avoids filler accumulation during continuous operation, improves processing efficiency, protects the filler during the processing, avoids mechanical damage, extends the filler life, reduces filler loss, and reduces operating costs. Example 2

[0033] Based on Example 1, such as Figures 1-3 As shown, the screening mechanism 1 includes support columns 11, and screening boxes 12 are provided on four support columns 11. A feed pipe 13 is provided on the top of the screening box 12, and a mud discharge pipe 14 is vertically provided on the bottom of the screening box 12. A discharge port 15 is provided on the side of the screening box 12 away from the feed pipe 13. A first rotating shaft 16 and a second rotating shaft 17 are rotatably arranged inside the screening box 12. A conveyor belt 18 is driven on the first rotating shaft 16 and the second rotating shaft 17. The conveyor belt 18 is provided with multiple guide plates 181 and screen holes. The first rotating shaft 16 is drivenly connected to the drive mechanism 4. A vibration component 19 and an anti-blocking component 20 are provided inside the conveyor belt 18 to facilitate the discharge port 15. The vibration component 19 is drivenly connected to the first rotating shaft 16, and the anti-blocking component 20 is drivenly connected to the vibration component 19.

[0034] The working principle and beneficial effects of the above technical solution are as follows: Four support columns 11 support and fix the screening box 12. The screening box 12 fixes the top feed pipe 13 and the bottom sludge discharge pipe 14. The packing material falls from the feed pipe 13 into the screening box 12 and then onto the conveyor belt 18 below the feed pipe 13. The conveyor belt 18 is driven to rotate by the first rotating shaft 16 and the second rotating shaft 17. The conveyor belt 18 is made of stainless steel to prevent liquid from corroding the conveyor belt 18 and causing secondary pollution to the packing material. The drive mechanism 4 drives the first rotating shaft 16 to rotate. The guide plate 181 pushes the packing material to move towards the discharge port 15. The screen holes filter the mud and sand. The conveyor belt 18 dynamically screens and improves the mud and sand separation effect. The mud and sand fall into the bottom of the screening box 12 and are discharged through the sludge discharge pipe 14. The vibration component 19 prevents the screen holes from clogging. The anti-clogging component 20 assists in smooth sludge discharge. The vibration component 19 and the anti-clogging component 20 provide double protection to extend the continuous operation time of the device.

[0035] like Figures 1-3As shown, the inner wall of the screening box 12 is provided with a plurality of nozzles 121 facing the direction of the conveyor belt 18, and the side wall of the screening box 12 is provided with a water pipe 122. The water pipe 122 is connected to the plurality of nozzles 121 and a water tank 123 respectively, and the water tank 123 is located on the outside of the screening box 12.

[0036] The working principle and beneficial effects of the above technical solution are as follows: the screening box 12 and the water tank 123 fix the water pipe 122, the water tank 123 supplies water to the nozzle 121 through the water pipe 122, the nozzle 121 washes the packing on the conveyor belt 18, removes residual mud and sand and prevents the screen holes from clogging, and avoids sludge caking, which accelerates the separation efficiency of the packing and mud and sand and maintains the screening efficiency. Example 3

[0037] Based on Examples 1-2, such as Figures 1-2 As shown, the drying and conveying mechanism 3 includes a discharge pipe 31, which is inclinedly arranged on one side of the discharge port 15. A rotating shaft 32 is rotatably arranged inside the discharge pipe 31, and a spiral pusher 33 is arranged on the rotating shaft 32. The feed port on the lower side of the discharge pipe 31 is connected to the discharge port 15 through a feed pipe 34. A driving member 35 is arranged on the higher side of the discharge pipe 31, and the driving member 35 is connected to the rotating shaft 32 in a transmission manner. A guide pipe 36 is arranged at the bottom of the higher side of the discharge pipe 31, and a collection hopper 5 is arranged below the guide pipe 36.

[0038] The working principle and beneficial effects of the above technical solution are as follows: the packing enters the inclined discharge pipe 31 through the discharge port 15, and the driving component 35 drives the spiral pusher 33 of the rotating shaft 32 to rotate. In this application, the driving component 35 is a motor, which pushes the packing upward. During the upward movement of the packing, the moisture in the packing naturally drains and finally falls into the collection hopper 5 through the guide pipe 36. The spiral pusher 33 prolongs the retention time of the packing, accelerates the drainage of the packing, reduces the presence of moisture, and provides convenience for the subsequent processing of the packing. The inclined design reduces the floor space occupied. Example 4

[0039] Based on Examples 1-2, such as Figures 2-4 As shown, the screening box 12 is also provided with a receiving assembly 21 for transferring the filler. The receiving assembly 21 includes a guide block 211 for being pressed by the guide plate 181. A limiting groove 212 is formed in the guide block 211. A receiving plate 213 is hinged in the limiting groove 212. A buffer spring 214 is provided between the bottom of the receiving plate 213 and the limiting groove 212.

[0040] The working principle and beneficial effects of the above technical solution are as follows: the screening box 12 fixes the guide block 211, the limiting groove 212 opened in the guide block 211 is hinged to the receiving plate 213, the limiting groove 212 fixes one end of the buffer spring 214, the buffer spring 214 provides elastic support for the guide plate 181, when the guide plate 181 pushes the packing to the end, the guide plate 181 abuts against the receiving plate 213, and the packing enters the feed pipe from the receiving plate 213. Within 34, the guide plate 181 continues to move and impact the receiving plate 213. After being pressed down, the receiving plate 213 does not interfere with the guide plate 181. Before the next guide plate 181 arrives, the receiving plate 213 rebounds under the action of the buffer spring 214, pushing the packing into the feed pipe 34. The buffer spring 214 absorbs the impact force, and the receiving plate 213 guides the packing to slide into the discharge port 15. The buffer structure reduces collision damage and prevents packing breakage to a certain extent.

[0041] like Figures 2-3 As shown, the oscillation assembly 19 includes a plurality of third rotating shafts 191. The two ends of the third rotating shafts 191 are rotatably mounted on the side wall of the screening box 12. The middle part of the third rotating shaft 191 passes through the conveyor belt 18. Two adjacent third rotating shafts 191 are connected by a belt 192. One end of the third rotating shaft 191 near the first rotating shaft 16 extends out of the screening box 12 and is connected to the first rotating shaft 16 by a belt 192. A first cam 193 acting on the conveyor belt 18 is provided in the middle of the third rotating shaft 191.

[0042] The working principle and beneficial effects of the above technical solution are as follows: the screening box 12 inside the third rotating shaft 191 rotates, the third rotating shaft 191 fixes the first cam 193, the first rotating shaft 16 drives the third rotating shaft 191 to rotate through the belt 192, the first cam 193 rotates with the third rotating shaft 191 and periodically lifts the conveyor belt 18 to generate vibration to prevent the screen holes from clogging. Vibration is achieved by using the main driving force, without the need for additional energy.

[0043] like Figures 2-3As shown, the anti-blocking component 20 includes a movable box 201 and a second cam 207. The two movable boxes 201 are symmetrically arranged on both sides of the conveyor belt 18. The movable boxes 201 are vertically slidably arranged on the inner wall of the screening box 12. The movable box 201 has a clearance groove 202 for avoiding the first rotating shaft 16 on the side facing the conveyor belt 18. An arc plate 203 is slidably arranged inside the movable box 201. The arc plate 203 is connected to the top of the movable box 201 by a plurality of tension springs 204. The second cam 207 is symmetrically arranged at both ends of the third rotating shaft 191 near the first rotating shaft 16. The second cam 207 is movably arranged inside the movable box 201. The bottom of the two movable boxes 201 is respectively provided with a fixing frame 205. A piston column 206 for piston movement in the mud discharge pipe 14 is fixedly arranged in the middle of the two fixing frames 205.

[0044] The working principle and beneficial effects of the above technical solution are as follows: the inner wall of the screening box 12 horizontally limits the moving box 201, the moving box 201 vertically guides the arc plate 203, multiple tension springs 204 buffer the moving box 201 and the arc plate 203, the bottom of the two moving boxes 201 are respectively fixed to their respective fixing frames 205, the third rotating shaft 191 drives the second cam 207 to rotate, the second cam 207 lifts the moving box 201, and at the same time the avoidance groove 202 avoids the third rotating shaft 191, the arc plate 203 buffers the impact between the second cam 207 and the moving box 201, the fixing frame 205 at the bottom of the moving box 201 is linked to the piston column 206, so that the piston column 206 moves up and down in the mud discharge pipe 14, the piston column 206 actively clears the mud discharge pipe 14 and a single power source synchronously controls the vibration and mud discharge movement.

[0045] like Figures 2-3 As shown, the cross-sectional dimension of the piston column 206 is smaller than that of the mud discharge pipe 14, and the bottom of the piston column 206 is a frustum structure.

[0046] The working principle and beneficial effects of the above technical solution are as follows: When the piston column 206 moves up and down, its frustum structure pushes the mud away and clears the mud discharge pipe 14. The gap design between the piston column 206 and the mud discharge pipe 14 avoids mud splashing. The frustum structure guides the mud to flow in a directional manner. The gap design prevents the pipe from being sealed too tightly. Example 5

[0047] Based on Examples 1-3, such as Figures 1-3 As shown, the bottom surface of the discharge pipe 31 is provided with a water passage hole, and a liquid collection tank 37 is fixedly provided at the bottom of the discharge pipe 31 below the water passage hole. The liquid collection tank 37 is connected to the mud discharge pipe 14 through a liquid collection pipe 38.

[0048] The working principle and beneficial effects of the above technical solution are as follows: the water passage at the bottom of the discharge pipe 31 collects the liquid leaked from the packing material, the liquid collection tank 37 temporarily stores the liquid, and the liquid collection pipe 38 introduces the liquid into the sludge discharge pipe 14 for unified discharge with the screening mud and sand wastewater. The water passage achieves efficient collection of the leaked water, the liquid collection tank 37 avoids liquid dripping and pollution, and the liquid collection pipe 38 simplifies the wastewater discharge path.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A screening device for MBBR packing material in a municipal wastewater treatment plant, characterized in that: The device includes a screening mechanism (1) for separating filler and silt, a conveying mechanism (3) for conveying and drying filler is provided on one side of the screening mechanism (1), the screening mechanism (1) is connected to the conveying mechanism (3), a driving mechanism (4) is provided outside the screening mechanism (1), the driving mechanism (4) is connected to the screening mechanism (1) in a transmission manner, a hopper (5) for collecting filler is provided at the discharge end of the conveying mechanism (3), and the screening mechanism (1) includes a screening box (12) for carrying the filler.

2. The MBBR packing screening device for a municipal wastewater treatment plant biological tank according to claim 1, characterized in that: The screening mechanism (1) includes support columns (11), and screening boxes (12) are provided on the four support columns (11). A feed pipe (13) is provided on the top of the screening box (12), and a mud discharge pipe (14) is vertically provided on the bottom of the screening box (12). A discharge port (15) is provided on the side of the screening box (12) away from the feed pipe (13). A first rotating shaft (16) and a second rotating shaft (17) are rotatably arranged inside the screening box (12). The first rotating shaft (16) and the... A conveyor belt (18) is driven on the second rotating shaft (17). The conveyor belt (18) is provided with multiple guide plates (181) and has sieve holes. The first rotating shaft (16) is driven to the drive mechanism (4). The conveyor belt (18) is provided with a vibration component (19) and an anti-blocking component (20) to facilitate the discharge port (15). The vibration component (19) is driven to the first rotating shaft (16), and the anti-blocking component (20) is driven to the vibration component (19).

3. The MBBR packing screening device for a municipal wastewater treatment plant biological tank according to claim 2, characterized in that: The inner wall of the screening box (12) is provided with a plurality of nozzles (121) facing the direction of the conveyor belt (18). The side wall of the screening box (12) is provided with a water pipe (122). The water pipe (122) is connected to the plurality of nozzles (121) and a water tank (123) respectively. The water tank (123) is located on the outside of the screening box (12).

4. The MBBR packing screening device for a municipal wastewater treatment plant biological tank according to claim 2, characterized in that: The drying and conveying mechanism (3) includes a discharge pipe (31), which is inclinedly arranged on one side of the discharge port (15). A rotating shaft (32) is rotatably arranged inside the discharge pipe (31), and a spiral pusher (33) is arranged on the rotating shaft (32). The feed port on the lower side of the discharge pipe (31) is connected to the discharge port (15) through a feed pipe (34). A driving member (35) is arranged on the higher side of the discharge pipe (31), and the driving member (35) is connected to the rotating shaft (32) in a transmission. A guide pipe (36) is arranged at the bottom of the higher side of the discharge pipe (31), and a collection hopper (5) is arranged below the guide pipe (36).

5. A screening device for MBBR packing material in a municipal wastewater treatment plant according to claim 2, characterized in that: The screening box (12) is also provided with a receiving assembly (21) for transferring the filler. The receiving assembly (21) includes a guide block (211) for being pressed by the guide plate (181). A limiting groove (212) is provided in the guide block (211). A receiving plate (213) is hinged in the limiting groove (212). A buffer spring (214) is provided between the bottom of the receiving plate (213) and the limiting groove (212).

6. The MBBR packing screening device for a municipal wastewater treatment plant biological tank according to claim 5, characterized in that: The oscillation assembly (19) includes a plurality of third rotating shafts (191). The two ends of the third rotating shafts (191) are rotatably disposed on the side wall of the screening box (12). The middle part of the third rotating shafts (191) passes through the conveyor belt (18). Two adjacent third rotating shafts (191) are connected by a belt (192). One end of the third rotating shaft (191) near the first rotating shaft (16) extends out of the screening box (12) and is connected to the first rotating shaft (16) by a belt (192). The middle part of the third rotating shaft (191) is provided with a first cam (193) that acts on the conveyor belt (18).

7. A screening device for MBBR packing material in a municipal wastewater treatment plant according to claim 6, characterized in that: The anti-blocking component (20) includes a movable box (201) and a second cam (207). The two movable boxes (201) are symmetrically arranged on both sides of the conveyor belt (18). The movable boxes (201) are vertically slidably arranged on the inner wall of the screening box (12). The movable box (201) has a clearance groove (202) on the side facing the conveyor belt (18) to avoid the first rotating shaft (16). An arc plate (203) is slidably arranged inside the movable box (201). The arc plate (203) is connected to the movable box (207) and the second cam (207). The tops of the movable boxes (201) are connected by multiple tension springs (204). The second cams (207) are symmetrically arranged at both ends of the third rotating shaft (191) near the first rotating shaft (16). The second cams (207) are movably arranged in the movable boxes (201). The bottoms of the two movable boxes (201) are respectively provided with fixed frames (205). A piston column (206) for piston movement in the mud discharge pipe (14) is fixedly arranged in the middle of the two fixed frames (205).

8. The MBBR packing screening device for a municipal wastewater treatment plant biological tank according to claim 7, characterized in that: The cross-sectional dimension of the piston column (206) is smaller than that of the mud discharge pipe (14), and the bottom of the piston column (206) is a frustum structure.

9. A screening device for MBBR packing material in a municipal wastewater treatment plant according to claim 4, characterized in that: The bottom surface of the discharge pipe (31) is provided with a water passage hole, and a liquid collection tank (37) is fixedly provided at the bottom of the discharge pipe (31) below the water passage hole. The liquid collection tank (37) is connected to the mud discharge pipe (14) through the liquid collection pipe (38).

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