A slag removal system for biological treatment tanks

Abstract

This utility model belongs to the field of wastewater treatment technology, specifically disclosing a sludge removal system for a biological treatment tank. It includes a sludge removal unit, a water spraying unit, and a collection unit. The sludge removal unit is located at the inlet of the biological treatment tank and is used to remove flocculent matter from the water entering the tank. The water spraying unit includes a first water spraying unit located on the four inner walls of the biological treatment tank and a second water spraying unit located on the inner walls of adjacent sides of the tank. The first water spraying unit is used to clean the inner walls of the biological treatment tank and flush scum from the edges towards the center. The second water spraying unit is used to flush scum towards the corner formed by the inner walls of the other adjacent sides of the tank. The collection unit is located at this corner to collect the scum, thereby removing scum from the biological treatment tank. This utility model can effectively remove flocculent matter and scum from the biological treatment tank, reduce the failure rate of equipment at the bottom of the tank, efficiently clean the tank walls, reduce the labor intensity of workers, and is highly efficient.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a sludge removal system for a biological treatment tank. Background Technology

[0002] After entering the wastewater treatment plant, wastewater passes through coarse and fine screens for filtration before entering the biological treatment tank for biochemical reactions. However, fibrous flocs and scum still enter the biological treatment tank. These flocs easily cause blockages in the equipment at the bottom of the tank, leading to a high failure rate and affecting the normal operation of the wastewater treatment plant. Currently, manual scum removal is commonly used, but this method is not only labor-intensive and inefficient, but also yields unsatisfactory scum removal results.

[0003] Meanwhile, after the biological treatment tank has been running for a period of time, the tank walls become quite dirty. Manual cleaning of the tank walls is usually required, which is not only labor-intensive but also inefficient. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a slag removal system for biological treatment tanks. This utility model can effectively remove flocculent matter and scum in biological treatment tanks, reduce the failure rate of equipment at the bottom of the tank, efficiently clean the walls of the biological treatment tank, reduce the labor intensity of workers, and is highly efficient.

[0005] The technical solution of this utility model is implemented as follows: A sludge removal system for a biological treatment tank includes a sludge removal unit, a water spraying unit, and a collection unit. The sludge removal unit is located at the inlet of the biological treatment tank and is used to remove flocculent matter from the water entering the tank. The water spraying unit includes a first water spraying unit located on the inner walls of the four sides of the biological treatment tank and a second water spraying unit located on the inner walls of adjacent sides of the tank. The first water spraying unit is used to clean the inner walls of the biological treatment tank and flush scum from the edges of the tank toward the center. The second water spraying unit is used to flush scum toward the corner formed by the inner walls of the other adjacent sides of the tank. The collection unit is located at this corner and is used to collect the scum, thereby removing scum from the biological treatment tank.

[0006] Furthermore, the slag removal unit includes a slag removal body and a first lifting mechanism. The slag removal body is used to intercept flocculent matter, and the first lifting mechanism is connected to the slag removal body to drive the slag removal body to rise and fall.

[0007] Furthermore, the slag removal body includes a rectangular frame, which is formed by connecting two horizontally arranged crossbars and two vertically arranged vertical bars. Several intercepting bars are provided inside the rectangular frame. All intercepting bars are arranged parallel to the vertical bars and are evenly distributed. The two ends of the intercepting bars are respectively connected to the two horizontal bars. Several first intercepting branches are distributed on each intercepting bar. All first intercepting branches are located on the side of the intercepting bar in the direction of incoming water and are inclined. At the same time, several second intercepting branches are provided on each of the two vertical bars. The second intercepting branches are located inside the rectangular frame and on the side of the vertical bar in the direction of incoming water, and all second intercepting branches are inclined.

[0008] Furthermore, the first lifting mechanism includes a first lifting motor and a vertically arranged first lifting rod. The lower end of the first lifting rod is connected to the slag removal body, and the first lifting rod has a rack. The first lifting motor is supported on a first support frame, and a first gear is provided on the output shaft of the first lifting motor. The first gear meshes with the rack on the first lifting rod, so that the first lifting motor can drive the first gear to rotate, thereby driving the first lifting rod to rise and fall, and thus driving the slag removal body to rise and fall.

[0009] Furthermore, the first water spraying unit includes a first water pump, a first water supply pipe, and several water spraying branch pipes. One end of the first water supply pipe is connected to the first water pump to introduce greywater. One end of each water spraying branch pipe is connected to the first water supply pipe, and the other end of each water spraying branch pipe is equipped with a nozzle. The nozzle is rotatably mounted on the water spraying branch pipe to facilitate adjustment of the greywater spraying direction.

[0010] Furthermore, the water spray branch pipe is composed of a first pipe section and a second pipe section. One end of the first pipe section and one end of the second pipe section are connected to each other and form an L-shaped structure. The other end of the first pipe section is connected to the first water supply pipe. The second pipe section is parallel to the wall of the corresponding biological tank. The nozzle is rotatably set at the other end of the second pipe section, and any nozzle located on the inner wall of the four sides of the biological tank is located behind the adjacent nozzle.

[0011] Furthermore, the second water spraying unit includes a second water pump, a second water supply pipe, and several spray guns. One end of the second water supply pipe is connected to the second water pump to introduce greywater. All spray guns are connected to the second water supply pipe and are rotatably mounted on the second water supply pipe.

[0012] Furthermore, the collection unit includes a collection frame and a slag pump. The top surface of the collection frame is open and located 8-10 mm below the liquid surface. The slag pump is located below the collection frame with its inlet inside the collection frame and its outlet below the slag pump, which facilitates starting the slag pump to drive the floating slag into the collection frame.

[0013] Furthermore, the inner wall of the collection frame is provided with several barbs to prevent scum entering the collection frame from returning to the biological treatment tank.

[0014] Furthermore, the collection unit also includes a liquid level sensor, a second lifting mechanism, and a controller. The second lifting mechanism includes a second lifting motor and a vertically arranged second lifting rod. The lower end of the second lifting rod is fixed to the collection frame and the sludge pump. The second lifting rod has a rack. The second lifting motor is supported on a second support frame. A second gear is provided on the output shaft of the second lifting motor to mesh with the rack on the second lifting rod, so that the second lifting motor can drive the lifting rod to rise and fall.

[0015] The liquid level sensor is installed on the collection frame to detect the liquid level in the biological treatment tank; the controller is connected to the second lifting motor and the liquid level sensor, so that the controller can control the second lifting motor according to the liquid level in the biological treatment tank to drive the collection frame and the sludge pump to lift.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention incorporates a sludge removal unit at the inlet of the biological treatment tank. This unit removes fibrous and other flocculent materials from the wastewater entering the tank, reducing the amount of flocculent material and thus minimizing or even eliminating blockages in the bottom equipment, thereby lowering the failure rate. Simultaneously, first water spray units are installed on all four inner walls of the biological treatment tank to clean the inner walls, eliminating the need for manual cleaning and effectively reducing labor intensity and increasing efficiency. When scum needs to be removed, a second water spray unit is activated, directing the scum towards a collection unit for collection. This eliminates the need for manual scum removal, further reducing labor intensity and improving sludge removal efficiency. Attached Figure Description

[0017] Figure 1 - A schematic diagram of the structure of this utility model.

[0018] Figure 2 -Structural diagram of the slag removal unit.

[0019] Wherein: 1-Biological tank; 2-Slag removal unit; 21-Horizontal bar; 22-Vertical bar; 23-Interception bar; 24-First interception branch; 25-Second interception branch; 26-First lifting bar; 27-Lifting motor assembly; 3-Water spray branch pipe; 4-Spray gun; 5-Collection unit. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] During the wastewater treatment process, fibrous flocs and scum enter the biological treatment tank. These flocs easily cause blockages in the tank bottom equipment, leading to a high failure rate and affecting the normal operation of the wastewater treatment plant. Furthermore, after a period of operation, the tank walls become quite dirty. Manual sludge removal and cleaning are labor-intensive, inefficient, and yield unsatisfactory sludge removal results.

[0022] Based on this, the present invention provides a slag removal system for biological treatment tanks, see [link to relevant documentation]. Figure 1 and Figure 2 The system includes a slag removal unit 2, a water spraying unit, and a collection unit 5. The slag removal unit 2 is located at the inlet of the biological treatment tank 1 and is used to remove flocculent matter from the water entering the biological treatment tank. The water spraying unit includes a first water spraying unit located on the inner walls of the four sides of the biological treatment tank 1 and a second water spraying unit located on the inner walls of adjacent sides of the biological treatment tank 1. The first water spraying unit is used to clean the inner walls of the biological treatment tank 1 and to flush the scum at the edge of the biological treatment tank towards the center of the biological treatment tank 1. The second water spraying unit is used to flush the scum towards the corner formed by the inner walls of the other adjacent sides of the biological treatment tank 1. The collection unit 5 is located at this corner and is used to collect the scum, thereby removing the scum in the biological treatment tank 1.

[0023] By installing a sludge removal unit at the inlet of the biological treatment tank, fibers and other flocculent matter in the wastewater entering the tank can be removed, reducing the amount of flocculent matter and thus minimizing or even eliminating the risk of blockage in the bottom equipment, thereby lowering the failure rate of the equipment. First water spray units are installed on all four inner walls of the biological treatment tank to clean the inner walls, eliminating the need for manual cleaning and effectively reducing labor intensity and improving efficiency. When it is necessary to remove scum from the biological treatment tank, the second water spray unit is activated, which flushes the scum towards the collection unit, where it is then collected. This removes the scum from the biological treatment tank without the need for manual scum removal, effectively reducing labor intensity and improving sludge removal efficiency.

[0024] In specific implementation, the slag removal unit 2 includes a slag removal body and a first lifting mechanism. The slag removal body is used to intercept flocculent matter, and the first lifting mechanism is connected to the slag removal body to drive the slag removal body to rise and fall.

[0025] The slag removal body here can be a mesh interception structure or a fine screen. The first lifting mechanism can consist of pulleys and ropes. Specifically, a support is installed at the biochemical tank inlet corresponding to the edge of the biochemical tank. The support consists of a horizontal beam and two vertical beams. The upper ends of the two vertical beams are fixed to the two ends of the horizontal beam. Pulleys are installed on the horizontal beams of the support. One end of the rope is connected to the slag removal body, and the other end passes around the pulley and is tied to the vertical beam of the support to fix the position of the slag removal body. The slag removal body can be raised or lowered by pulling the rope.

[0026] In this specific implementation, the slag removal body includes a rectangular frame, which is formed by connecting two horizontally arranged crossbars 21 and two vertically arranged vertical bars 22. A plurality of intercepting bars 23 are provided inside the rectangular frame. All intercepting bars 23 are arranged parallel to the vertical bars 22 and are evenly distributed. The two ends of the intercepting bars 23 are respectively connected to the two crossbars 21. A plurality of first intercepting branches 24 are distributed on each intercepting bar 23. All first intercepting branches 24 are located on the side of the intercepting bar 23 in the direction of incoming water and are inclined. At the same time, a plurality of second intercepting branches 25 are provided on each of the two vertical bars 22. The second intercepting branches 25 are located inside the rectangular frame and on the side of the vertical bars 22 in the direction of incoming water, and all second intercepting branches 25 are inclined.

[0027] The first lifting mechanism includes a first lifting motor and a vertically arranged first lifting rod 26. The lower end of the first lifting rod 26 is connected to the middle of the horizontal bar 21 above the slag removal body, and the first lifting rod 26 has a rack. The first lifting motor is supported on the first support frame. The output shaft of the first lifting motor is provided with a first gear. The first gear meshes with the rack on the first lifting rod, so that the first lifting motor can drive the first gear to rotate, thereby driving the first lifting rod 26 to rise and fall, thereby driving the slag removal body to rise and fall.

[0028] Here, the first lifting motor and the first gear constitute the lifting assembly 27, which is supported on the first support frame. The first and second intercepting branches are arranged like tree branches on the intercepting rods or vertical rods. Some of the first intercepting branches are inclined to the left, and some are inclined to the right. The first intercepting branches at the top of the intercepting rods are inclined downwards, while the second intercepting branches at the top of the vertical rods are inclined downwards, and the second intercepting branches in other places are inclined upwards. This is conducive to effectively intercepting flocculent matter in sewage. When water enters the biological treatment tank, the first lifting motor drives the sludge removal body to descend and cover the entire inlet of the biological treatment tank to intercept flocculent matter in the sewage. After the water enters, the first lifting motor drives the sludge removal body to rise, and the flocculent matter on the sludge removal body is cleaned.

[0029] In specific implementation, the first water spraying unit includes a first water pump, a first water supply pipe and several water spraying branch pipes 3. One end of the first water supply pipe is connected to the first water pump to introduce greywater. One end of each water spraying branch pipe 3 is connected to the first water supply pipe, and the other end of each water spraying branch pipe 3 is provided with a nozzle. The nozzle is rotatably mounted on the water spraying branch pipe 3 to facilitate adjustment of the direction of greywater spraying.

[0030] In specific implementation, the water spray branch pipe 3 is composed of a first pipe section and a second pipe section. One end of the first pipe section and one end of the second pipe section are connected to each other and form an L-shaped structure. The other end of the first pipe section is connected to the first water supply pipe. The second pipe section is parallel to the wall of the corresponding biological tank. The nozzle is rotatably set at the other end of the second pipe section, and any nozzle on the inner wall of the four sides of the biological tank is located behind the adjacent nozzle.

[0031] Any nozzle located on the inner wall of the four sides of the biological tank is located behind the adjacent nozzle, by Figure 1 As can be seen from a top-down view, all nozzles are arranged in a clockwise direction. This allows the pressurized water sprayed from the nozzles to cover the entire inner wall of the biological treatment tank, thus cleaning the entire tank wall. Of course, the nozzles can also be arranged in a counterclockwise direction. In this case, when cleaning the tank wall, the pressurized water sprayed from the nozzles impacts the dirt on the tank wall, effectively washing away the dirt. At the same time, the water flowing down the tank wall can flush the scum at the edge of the biological treatment tank towards the center of the tank. Then, the second spray unit can flush the scum in the biological treatment tank towards the collection unit.

[0032] In specific implementation, the second water spraying unit includes a second water pump, a second water supply pipe and several spray guns 4. One end of the second water supply pipe is connected to the second water pump to introduce water. All spray guns 4 are connected to the second water supply pipe and can be rotatably mounted on the second water supply pipe.

[0033] This allows the spray gun to be adjusted in direction, sweeping left and right from near to far to drive away scum and direct it towards the collection unit. The nozzle and spray gun can be mounted on the water spray branch pipe and the second water supply pipe via a rotary joint.

[0034] In specific implementation, the collection unit 5 includes a collection frame and a slag pump. The top surface of the collection frame is open and located 8-10 mm below the liquid surface. The slag pump is located below the collection frame with its inlet inside the collection frame and its outlet below the slag pump, so as to facilitate starting the slag pump to drive the floating slag into the collection frame.

[0035] When the scum pump starts, it creates negative pressure, causing the water above the collection frame to flow towards it. This carries the scum in the water into the collection frame, allowing for its collection. Cleaning the collection frame then effectively removes scum from the biological treatment tank. The shape of the collection frame is not limited; it can be round, square, etc.

[0036] In practice, the inner wall of the collection frame is provided with several barbs to prevent scum from entering the collection frame from returning to the biological treatment tank.

[0037] In a specific implementation, the collection unit 5 further includes a liquid level sensor, a second lifting mechanism, and a controller. The second lifting mechanism includes a second lifting motor and a vertically arranged second lifting rod. The lower end of the second lifting rod is fixed to the collection frame and the sludge pump. The second lifting rod has a rack. The second lifting motor is supported on a second support frame. A second gear is provided on the output shaft of the second lifting motor to mesh with the rack on the second lifting rod, so that the second lifting motor can drive the second lifting rod to lift.

[0038] The liquid level sensor is installed on the collection frame to detect the liquid level in the biological treatment tank; the controller is connected to the second lifting motor and the liquid level sensor, so that the controller can control the second lifting motor according to the liquid level in the biological treatment tank to drive the collection frame and the sludge pump to lift.

[0039] In this way, when collecting scum in the biological treatment tank, the controller can automatically adjust the height of the collection frame and the scum pump according to the liquid level in the biological treatment tank to ensure the best scum removal effect; when it is necessary to clean the scum collected in the collection frame, the collection frame and the scum pump rise, thereby removing the scum in the collection frame.

[0040] Both the first and second support frames can be composed of a horizontally arranged crossbeam and two vertically arranged vertical beams. The upper ends of the two vertical beams and the two ends of the crossbeams are fixed to provide support.

[0041] Finally, it should be noted that the above embodiments of this utility model are merely examples for illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations and modifications based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A slag removal system for a biological treatment tank, characterized in that, The system includes a slag removal unit, a water spraying unit, and a collection unit. The slag removal unit is located at the inlet of the biological treatment tank and is used to remove flocculent matter from the water entering the biological treatment tank. The water spraying unit includes a first water spraying unit located on the inner walls of the four sides of the biological treatment tank and a second water spraying unit located on the inner walls of adjacent sides of the biological treatment tank. The first water spraying unit is used to clean the inner walls of the biological treatment tank and flush the scum at the edge of the biological treatment tank toward the center of the biological treatment tank. The second water spraying unit is used to flush the scum toward the corner formed by the inner walls of the other adjacent sides of the biological treatment tank. The collection unit is located at this corner and is used to collect the scum, thereby removing the scum from the biological treatment tank.

2. The system according to claim 1, wherein, The slag removal unit includes a slag removal body and a first lifting mechanism. The slag removal body is used to intercept flocculent matter, and the first lifting mechanism is connected to the slag removal body to drive the slag removal body to rise and fall.

3. The system according to claim 2, wherein, The slag removal body includes a rectangular frame, which is formed by connecting two horizontally arranged crossbars and two vertically arranged vertical bars. Several intercepting bars are provided inside the rectangular frame. All intercepting bars are arranged parallel to the vertical bars and are evenly distributed. The two ends of the intercepting bars are respectively connected to the two horizontal bars. Several first intercepting branches are distributed on each intercepting bar. All first intercepting branches are located on the side of the intercepting bar in the direction of incoming water and are inclined. At the same time, several second intercepting branches are provided on each of the two vertical bars. The second intercepting branches are located inside the rectangular frame and on the side of the vertical bar in the direction of incoming water, and all second intercepting branches are inclined.

4. A system for removing sludge from a biochemical tank according to claim 2 or 3, characterized in that, The first lifting mechanism includes a first lifting motor and a vertically arranged first lifting rod. The lower end of the first lifting rod is connected to the slag removal body, and the first lifting rod has a rack. The first lifting motor is supported on a first support frame. The output shaft of the first lifting motor is provided with a first gear. The first gear meshes with the rack on the first lifting rod, so that the first lifting motor can drive the first gear to rotate, thereby driving the first lifting rod to rise and fall, and thus driving the slag removal body to rise and fall.

5. The system according to claim 1, wherein, The first water spraying unit includes a first water pump, a first water supply pipe, and several water spraying branch pipes. One end of the first water supply pipe is connected to the first water pump to introduce greywater. One end of each water spraying branch pipe is connected to the first water supply pipe, and the other end of each water spraying branch pipe is equipped with a nozzle. The nozzle is rotatably mounted on the water spraying branch pipe to facilitate adjustment of the greywater spraying direction.

6. The system according to claim 5, wherein, The water spray branch pipe is composed of a first pipe section and a second pipe section. One end of the first pipe section and one end of the second pipe section are connected to each other and form an L-shaped structure. The other end of the first pipe section is connected to the first water supply pipe. The second pipe section is parallel to the wall of the corresponding biological tank. The nozzle is rotatably set at the other end of the second pipe section, and any nozzle on the inner wall of the four sides of the biological tank is located behind the adjacent nozzle.

7. The system according to claim 1, wherein, The second water spraying unit includes a second water pump, a second water supply pipe and several spray guns. One end of the second water supply pipe is connected to the second water pump to introduce greywater. All spray guns are connected to the second water supply pipe and are rotatably mounted on the second water supply pipe.

8. The slag removal system for a biological treatment tank according to claim 1, characterized in that, The collection unit includes a collection frame and a slag pump. The top surface of the collection frame is open and located 8-10 mm below the liquid surface. The slag pump is located below the collection frame with its inlet inside the collection frame and its outlet below the slag pump, so as to facilitate the start of the slag pump to drive the floating slag into the collection frame.

9. The system according to claim 8, wherein, The inner wall of the collection frame is provided with several barbs to prevent scum that enters the collection frame from returning to the biological treatment tank.

10. A system for removing sludge from a biochemical tank according to claim 8 or 9, characterized in that, The collection unit also includes a liquid level sensor, a second lifting mechanism and a controller. The second lifting mechanism includes a second lifting motor and a vertically arranged second lifting rod. The lower end of the second lifting rod is fixed to the collection frame and the sludge pump. The second lifting rod has a rack. The second lifting motor is supported on a second support frame. The output shaft of the second lifting motor is provided with a second gear to mesh with the rack on the second lifting rod, so that the second lifting motor can drive the lifting rod to lift. The liquid level sensor is installed on the collection frame and is used to detect the liquid level in the biological treatment tank; The controller is connected to the second lifting motor and the liquid level sensor, which allows the controller to control the second lifting motor according to the liquid level in the biochemical tank, so as to drive the collection frame and the sludge pump to rise and fall.

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