Industrial wastewater treatment activated sludge concentration maintaining device

Abstract

The application discloses an industrial wastewater treatment active sludge concentration maintaining device, and relates to the field of active sludge treatment of wastewater, which comprises a barrel box, a shaft rod is rotationally arranged on the shaft part of the barrel box, liquid inlet boxes and liquid outlet pipes are arranged on the two sides of the barrel box, a liquid pump for guiding the suspension into the liquid inlet box is arranged on one side of the liquid inlet box, four filter plate pieces are arranged on the outer periphery of the shaft rod in a cross shape, so that the inside of the barrel box is sequentially divided into a first chamber, a second chamber, a third chamber and a fourth chamber in an anticlockwise direction, wherein the first chamber and the second chamber are communicated with the liquid inlet boxes and the liquid outlet pipes; the barrel box is provided with a servo motor for driving the shaft rod to rotate, and a reflux port is arranged on one side of the fourth chamber. The application has the technical effects of automatically maintaining the filtering permeability, making the active sludge return to the aeration tank by reverse flushing of the filter plate pieces to maintain the amount of microorganisms, and improving the wastewater treatment efficiency and stability without manual cleaning and maintenance.

Description

Technical Field

[0001] This invention relates to the field of activated sludge wastewater treatment technology, and more specifically, to a device for maintaining the concentration of activated sludge in industrial wastewater treatment. Background Technology

[0002] Activated sludge can degrade and adsorb pollutants in the aeration tank, thus purifying the wastewater. After adsorbing pollutants, the activated sludge forms flocculent suspended solids in the water. The suspended mixture in the aeration tank needs to be discharged to a secondary sedimentation tank for sedimentation treatment. The supernatant after sedimentation is discharged, and part of the sludge settled at the bottom is returned to the aeration tank to maintain the concentration of microorganisms, while the other part is discharged for treatment.

[0003] Since some of the settled activated sludge needs to be returned to the aeration tank to maintain the concentration of microorganisms, if the sludge is controlled and intercepted at the drainage point of the aeration tank, the amount of microorganisms in the aeration tank can be directly controlled. There is no need to introduce the sludge into the secondary sedimentation tank for sedimentation and then return it to the aeration tank. Moreover, it can reduce the workload of the secondary sedimentation tank, speed up the sedimentation process, and improve the efficiency of sewage treatment.

[0004] Currently, activated sludge is intercepted by filtration at the drainage end of the aeration tank. However, the fixed filter interception components are easily clogged by sludge, resulting in decreased permeability and the inability to achieve self-cleaning. Manual intervention is required to clean the sludge clogging the surface of the filter components, resulting in short maintenance cycles and high frequency.

[0005] In summary, how to solve the problems of fixed filter components being easily clogged when intercepting activated sludge, their inability to self-clean, and other shortcomings of existing technologies is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an activated sludge concentration maintenance device for industrial wastewater treatment, which effectively solves the problem that fixed filter components are easily clogged when intercepting activated sludge and cannot clean themselves.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An activated sludge concentration maintenance device for industrial wastewater treatment includes a cylindrical tank. A shaft is rotatably mounted on the shaft of the cylindrical tank. An inlet tank and a drain pipe are respectively provided on both sides of the cylindrical tank. A liquid pump for introducing suspension into the inlet tank is provided on one side of the inlet tank. Four filter plates are arranged in a cross shape on the outer periphery of the shaft, so that the interior of the cylindrical tank is divided into a first chamber, a second chamber, a third chamber and a fourth chamber in a counterclockwise direction. The first chamber and the second chamber are connected to the inlet tank and the drain pipe.

[0009] The cylindrical box is equipped with a servo motor for driving the shaft to rotate, so that the shaft can rotate forward or backward by 90°. A backflow port is provided on one side of the fourth chamber, so that the liquid in the first chamber can enter the fourth chamber by passing through the corresponding filter plate and then being discharged from the backflow port.

[0010] Preferably, an overflow tank is provided on one side of the liquid inlet tank, and an overflow plate is provided between the overflow tank and the liquid inlet tank so that the liquid in the liquid inlet tank can overflow from the top of the overflow plate to the overflow tank. An overflow port is provided on one side of the overflow tank, and the overflow port is connected to a drain pipe through an overflow pipe.

[0011] Preferably, a blocking plate is slidably provided on the top of the overflow plate along the height direction, and a screw is rotatably disposed on the surface of the overflow plate, the screw being threadedly connected to one side surface of the blocking plate.

[0012] Preferably, an impeller is rotatably mounted on the side of the plug plate near the overflow box, and an encoder is provided on the shaft of the impeller. The encoder is connected to the liquid pump via a controller.

[0013] Preferably, the top of the blocking plate is higher than the upper surface of the backflow port.

[0014] Preferably, the filter plate includes a base frame, a cover frame is fixedly attached to one side of the base frame, a filter screen is provided between the cover frame and the base frame, and a plurality of grid plates are evenly arranged on the other side of the base frame. One end of the grid plate is hinged to the base frame, and the grid plate of the filter plate located between the first chamber and the second chamber opens toward the second chamber.

[0015] Preferably, the base frame is fixed with a side strip, and the edge of the side strip has a plurality of lugs, the lugs being such that the maximum opening angle of the grid plate is 90°.

[0016] Preferably, a liquid level monitoring device is provided on the outside of the cylindrical tank. The liquid level monitoring device includes a storage tank, an inlet in the middle of the storage tank, the inlet communicating with the reflux port, and a return port and a guide port respectively opened on both sides of the storage tank. The guide port is higher than the return port and the inlet.

[0017] The return port is connected to a return pipe, the guide port is connected to the drain pipe through the guide pipe, a first micro-motion sensor is installed on the top of the storage tank, the first micro-motion sensor is connected to the servo motor through a controller, the storage tank is provided with a float, a baffle is connected to the side of the float near the return port, and the surface of the baffle has an opening;

[0018] When the baffle abuts against the bottom of the storage tank, the inlet is aligned with the return port, and the float isolates the inlet from the guide port so that the return port passes through the inlet. When the liquid level rises and the float moves upward to touch the first micro-motion sensor, the baffle blocks the return port, and the float is higher than the guide port so that the guide port passes through the inlet.

[0019] Preferably, a plurality of the first micro-motion sensors are provided, and the first micro-motion sensors are connected in parallel with the controller.

[0020] Preferably, the cylindrical box is provided with a positioner on the outside, the positioner includes a housing, the housing is provided with a torsion plate, and the shaft rotates through the housing and is fixedly connected to the torsion plate;

[0021] Four telescopic grooves are evenly opened along the edge of the torsion disc. Each telescopic groove has an arc-shaped protrusion that slides radially elastically through a spring. Four arc-shaped grooves are evenly opened on the inner wall of the outer shell. The four arc-shaped protrusions are correspondingly inserted into the four arc-shaped grooves. A second micro-motion sensor is installed in one of the arc-shaped grooves. The second micro-motion sensor is connected to the servo motor through a controller.

[0022] The activated sludge concentration maintenance device for industrial wastewater treatment provided by this invention divides the cylindrical tank into four chambers by arranging filter plates in a cross pattern inside the tank. The filter plate located between the first and second chambers serves as the main filter plate. When the main filter plate becomes clogged and needs cleaning, the filter plate originally located between the second and third chambers is moved to the space between the first and second chambers by rotating the shaft counterclockwise. The filter plate originally located between the first and second chambers is then moved to the space between the first and fourth chambers. This maintains the filtration effect while the overflow of liquid in the first chamber flushes the clogged filter plate. The flushed activated sludge is returned to the aeration tank to maintain the microbial biomass, eliminating the need for manual cleaning and maintenance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a first-view schematic diagram of the activated sludge concentration maintenance device for industrial wastewater treatment in this embodiment.

[0025] Figure 2This is a second-view schematic diagram of the activated sludge concentration maintenance device for industrial wastewater treatment in this embodiment;

[0026] Figure 3 This is a cross-sectional view of the activated sludge concentration maintenance device for industrial wastewater treatment in this embodiment;

[0027] Figure 4 This is a perspective view of the liquid inlet tank structure in this embodiment;

[0028] Figure 5 This is a schematic diagram of the filter plate structure in this embodiment;

[0029] Figure 6 This is a schematic diagram of the first state of the liquid level detection device in this embodiment;

[0030] Figure 7 This is a schematic diagram of the second state of the liquid level detection device in this embodiment;

[0031] Figure 8 This is a schematic diagram of the locator in this embodiment.

[0032] Figures 1-8 In the accompanying drawings, the reference numerals include:

[0033] 1. Cylindrical tank; 2. Filter plate; 3. Inlet tank; 4. Liquid pump; 5. Drain pipe; 6. Servo motor; 7. Positioner; 8. Liquid level monitoring device; 9. Return pipe;

[0034] 11. First chamber; 12. Second chamber; 13. Third chamber; 14. Fourth chamber; 15. Backflow port; 16. Shaft;

[0035] 21. Base frame; 22. Cover frame; 23. Filter screen; 24. Grille; 25. Edge strip; 26. Lug;

[0036] 31. Overflow box; 32. Blocking plate; 33. Impeller; 34. Encoder; 35. Overflow port; 36. Screw; 37. Overflow pipe;

[0037] 71. Housing; 72. Torque disc; 73. Telescopic groove; 74. Arc-shaped protrusion; 75. Arc-shaped groove; 76. Second micro-motion sensor;

[0038] 81. Liquid storage tank; 82. Inlet; 83. Return port; 84. Guide port; 85. Float; 86. Baffle; 87. Through port; 88. First micro-motion sensor;

[0039] 91. Drainage tube. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. This application discloses an activated sludge concentration maintenance device for industrial wastewater treatment.

[0042] The core of this invention is to provide a device for maintaining the concentration of activated sludge in industrial wastewater treatment.

[0043] Please refer to Figure 1 .

[0044] The activated sludge concentration maintenance device for industrial wastewater treatment provided by the present invention includes a cylindrical tank 1. A shaft 16 is rotatably mounted on the shaft of the cylindrical tank 1. An inlet tank 3 and a drain pipe 5 are respectively provided on both sides of the cylindrical tank 1. A liquid pump 4 for introducing suspension into the inlet tank 3 is provided on one side of the inlet tank 3. Four filter plates are provided in a cross shape on the outer periphery of the shaft 16, so that the inside of the cylindrical tank 1 is divided into a first chamber 11, a second chamber 12, a third chamber 13 and a fourth chamber 14 in a counterclockwise direction. The first chamber 11 and the second chamber 12 are connected to the inlet tank 3 and the drain pipe 5. The cylindrical tank 1 is provided with a servo motor 6 for driving the shaft 16 to rotate, so that the shaft 16 rotates forward or backward by 90°. A backflow port 15 is provided on one side of the fourth chamber 14, so that the liquid in the first chamber 11 passes through the corresponding filter plate 2 upward and reverses to enter the fourth chamber 14 and is discharged from the backflow port 15.

[0045] Specifically, the liquid pump 4 is turned on to introduce the suspension in the aeration tank into the liquid tank 3. The suspension enters the first chamber 11 and is filtered by the bottom filter plate 2. The filtered water is then introduced into the secondary sedimentation tank through the second chamber 12 and the drain pipe 5. During this process, the liquid pump 4 is controlled to ensure that the suspension fills the first chamber 11 and overflows from the backflow port 15. As the filtration process continues, the activated sludge accumulated on the side of the bottom filter plate 2 closest to the first chamber 11 gradually increases, causing the permeability of the bottom filter plate 2 to gradually decrease. The servo motor 6 is then activated to drive the filter. Rotating the movable shaft 16 by 90° causes the bottom filter plate 2 to be moved between the first chamber 11 and the fourth chamber 14. The accumulated activated sludge is located on the upper surface of the filter plate 2. The filter plate 2 between the second chamber 12 and the third chamber 13 moves to the bottom to maintain the smooth filtration effect. The liquid overflowing upward from the first chamber 11 backwashes the filter plate 2 between the first chamber 11 and the fourth chamber 14, causing the accumulated activated sludge to flow back to the aeration tank through the backflow port 15, the liquid level monitoring device 8, and the return pipe 9, thus maintaining the amount of microorganisms in the aeration tank.

[0046] The aforementioned activated sludge concentration maintenance device for industrial wastewater treatment utilizes shaft 16 and a drive mechanism to rotate and reposition filter plates 2, solving the problem of easy clogging and inability to self-clean the filter components 2 in existing technologies. Through reverse flushing of the liquid, clogged filter plates 2 can be cleaned promptly, ensuring smooth filtration and improving wastewater treatment efficiency. Simultaneously, the flushed activated sludge is returned to the aeration tank, maintaining the microbial population in the aeration tank, eliminating the need for frequent manual cleaning and maintenance, thus reducing labor costs and maintenance frequency.

[0047] The activated sludge concentration maintenance device for industrial wastewater treatment provided by the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0048] In one specific implementation, reference is made to... Figure 4 An overflow tank 31 is provided on one side of the liquid inlet tank 3. An overflow plate is provided between the overflow tank 31 and the liquid inlet tank 3 so that the liquid in the liquid inlet tank 3 can overflow from the top of the overflow plate to the overflow tank 31. An overflow port 35 is provided on one side of the overflow tank 31. The overflow port 35 is connected to the drain pipe 5 through the overflow pipe 37.

[0049] Furthermore, a blocking plate 32 is slidably provided on the top of the overflow plate along the height direction, and a screw 36 is rotatably arranged on the surface of the overflow plate, with the screw 36 threadedly connected to one side surface of the blocking plate 32.

[0050] Specifically, an overflow tank 31 of the same height is provided on one side of the inlet tank 3. The height of the partition between the overflow tank 31 and the inlet tank 3 is lower than the height of the top opening. A blocking plate 32 is vertically slidably installed on the top of the partition. A screw 36 is rotatably installed on the surface of the partition. A nut is installed on the surface of the blocking plate 32. The screw 36 is vertically threaded through the nut on the surface of the blocking plate 32. Rotating the screw 36 adjusts the height of the blocking plate 32 so that the top of the blocking plate 32 is lower than the top opening of the inlet tank 3 and the overflow tank 31, but higher than the backflow port 15. The liquid pump 4 conducts the suspension into the inlet tank 3. The controller adjusts the liquid pump 4 to gradually increase the liquid conduction power in stages. When the liquid inlet efficiency is greater than the liquid conduction efficiency of the bottom filter plate 2, the liquid volume in the inlet tank 3 gradually increases until the liquid overflows from the top of the blocking plate 32 and enters the overflow tank 31.

[0051] Based on any of the above embodiments, refer to Figure 4 An impeller 33 is rotatably mounted on the side of the block plate 32 near the overflow box 31. An encoder 34 is provided on the shaft of the impeller 33. The encoder 34 is connected to the liquid pump 4 through the controller.

[0052] Specifically, an impeller 33 is rotatably installed on the side of the plug plate 32 near the overflow tank 31. An encoder 34 is installed on the shaft of the impeller 33. The encoder 34 is connected to the liquid pump 4 through the controller. An overflow port 35 is opened on one side of the overflow tank 31. The overflow port 35 is connected to the drain pipe 5 through the overflow pipe 37. Liquid overflows from the top of the plug plate 32 and enters the overflow tank 31. The liquid washes the impeller 33 and rotates. The encoder 34 monitors the rotation speed of the impeller 33 to provide feedback on the liquid overflow efficiency. When the rotation speed of the impeller 33 reaches the set range, it means that the liquid overflow efficiency has reached the set speed. The controller controls the liquid pump 4 to maintain the liquid guiding efficiency at this time. Since the top of the plug plate 32 is higher than the backflow port 15, the liquid can overflow from the top of the plug plate 32, which ensures that the liquid can wash upwards and enter the fourth chamber 14 and then be guided back to the aeration tank through the backflow port 15.

[0053] Based on any of the above embodiments, refer to Figure 5 The filter plate 2 includes a base frame 21, a cover frame 22 is attached and fixed to one side of the base frame 21, a filter screen 23 is provided between the cover frame 22 and the base frame 21, and a number of grid plates 24 are evenly arranged on the other side of the base frame 21. One end of the grid plate 24 is hinged to the base frame 21. The grid plate 24 of the filter plate 2 located between the first chamber 11 and the second chamber 12 opens toward the second chamber 12.

[0054] Furthermore, the edge of the base frame 21 is fixed with a side strip 25, and the edge of the side strip 25 has a number of lugs 26, which make the maximum opening angle of the grid plate 24 90°.

[0055] Specifically, the filter plate 2 includes a base frame 21, which is fixedly connected to the shaft 16. A cover frame 22 is fixedly attached to one side of the base frame 21 by screws. A filter screen 23 is clamped between the cover frame 22 and the base frame 21. The cover frame 22 can be opened by removing the screws from the top opening of the cylindrical box 1 to replace the filter screen 23. Several grid plates 24 are evenly arranged on the other side of the base frame 21. One end of the grid plate 24 is hinged to the base frame 21. The length of the grid plate 24 is the same as the gap between the grid plates 24. A side strip 25 is fixed to the edge of the base frame 21. The edge of the side strip 25 has several lugs 26.

[0056] The lower filter plate 2 has its grid plate 24 facing the second chamber 12. Under the influence of gravity and water flow, the grid plate 24 flips downward and opens. The baffle 26 prevents the grid plate 24 from opening at a 90° angle, ensuring rapid filtration of the suspension in the first chamber 11 into the second chamber 12. Between the first chamber 11 and the fourth chamber 14, the grid plate 24 of the filter plate 2 opens vertically downward under gravity, allowing water in the first chamber 11 to overflow smoothly into the fourth chamber 14, achieving backwashing of the filter screen 23. Between the third chamber 13 and the fourth chamber 14, the grid plate 24 of the filter plate 2 seals the surface of the base frame 21 under gravity, preventing water overflowing from the fourth chamber 14 from entering the third chamber 13. The grid plate 24 of the filter plate 2 between the third chamber 13 and the second chamber 12 is also closed under gravity to prevent crossflow.

[0057] In a specific embodiment provided in this application, please refer to Figures 6 to 7 The outer side of the cylindrical tank 1 is provided with a liquid level monitoring device 8. The liquid level monitoring device 8 includes a liquid storage tank 81. The middle part of the liquid storage tank 81 has an inlet 82, which is connected to the backflow port 15. The two sides of the liquid storage tank 81 are respectively opened with a return port 83 and a guide port 84. The guide port 84 is higher than the return port 83 and the inlet 82.

[0058] The return port 83 is connected to the return pipe 9, and the guide port 84 is connected to the drain pipe 5 through the guide pipe 91. The top of the storage tank 81 is equipped with a first micro-motion sensor 88, which is connected to the servo motor 6 through the controller. The storage tank 81 is equipped with a float 85, and a baffle 86 is connected to the side of the float 85 near the return port 83. The surface of the baffle 86 has a through-hole 87.

[0059] When the baffle 86 abuts against the bottom of the liquid storage tank 81, the inlet 87 is aligned with the return port 83, and the float 85 isolates the inlet 82 and the guide port 84 so that the return port 83 can pass through the inlet 82. When the liquid level rises and the float 85 moves upward to touch the first micro-motion sensor 88, the baffle 86 blocks the return port 83, and the float 85 is higher than the guide port 84 so that the guide port 84 can pass through the inlet 82.

[0060] Specifically, the liquid level monitoring device 8 divides the blockage monitoring process into an early smooth flow stage and a later blockage stage.

[0061] The initial smooth flow stage occurs immediately after the filter plate 2 is rotated and adjusted. At this time, the clogged filter plate 2 moves to the space between the first chamber 11 and the fourth chamber 14. The filter plate 2 at the bottom has good permeability and can filter the suspension normally. The liquid overflowing upward into the fourth chamber 14 washes away the clogged filter plate 2. The washed-away sludge follows the liquid through the backflow port 15 and the inlet port 82 into the storage tank 81. At this time, the outlet 87 and the return port 83 are aligned, so that the return pipe 9 and the inlet port 82 are connected. The washed-away sludge follows the liquid through the return pipe 9 and is guided back to the aeration tank until the filter plate 2 between the first chamber 11 and the fourth chamber 14 is cleaned.

[0062] In the later clogging stage, the bottom filter plate 2 becomes clogged with sludge. At this point, the filter plate 2 between the first chamber 11 and the fourth chamber 14 has been cleaned. Due to the blockage of the bottom filter plate 2, a large amount of liquid overflows from the first chamber 11 into the fourth chamber 14. The efficiency of the liquid entering the storage tank 81 through the backflow port 15 and the inlet port 82 is greater than the drainage efficiency of the return pipe 9, causing the liquid level in the storage tank 81 to gradually rise. The float 85 drives the baffle 86 to rise, gradually blocking the return port 83. The accumulation of liquid in the storage tank 81 is aggravated. When the float 85 passes the guide port 84, the liquid is introduced from the guide port 84 and the guide pipe 91 to the drain pipe 5 and discharged into the secondary sedimentation tank, which can effectively continue the discharge of liquid from the aeration tank. When the float 85 reaches the top of the storage tank 81 and touches the first micro-motion sensor 88, the first micro-motion sensor 88 sends a signal to the controller, causing the servo motor 6 to work and adjust the filter plate 2 to change position. When the bottom filter plate 2 is normal, the amount of liquid introduced into the storage tank 81 decreases, causing the float 85 to descend and reset to the initial state.

[0063] Optionally, a plurality of first micro-motion sensors 88 are provided, and the first micro-motion sensors 88 are connected in parallel with the controller.

[0064] Specifically, multiple first micro-motion sensors 88 are distributed on the top of the liquid storage tank 81. The first micro-motion sensors 88 are connected in parallel with the controller, so that only one first micro-motion sensor 88 needs to be touched to send a blockage signal to the controller, ensuring the timeliness of monitoring information.

[0065] Based on any of the above embodiments, refer to Figure 8The cylindrical box 1 is equipped with a positioner 7 on its exterior. The positioner 7 includes a housing 71, and a torsion plate 72 is provided inside the housing 71. The shaft 16 rotatably passes through the housing 71 and is fixedly connected to the torsion plate 72. Four telescopic grooves 73 are evenly opened along the edge of the torsion plate 72. Arc-shaped protrusions 74 are provided in each telescopic groove 73 through a spring for radial elastic sliding. Four arc-shaped grooves 75 are evenly opened on the inner wall of the housing 71. The four arc-shaped protrusions 74 are correspondingly inserted into the four arc-shaped grooves 75. A second micro-motion sensor 76 is installed in one of the arc-shaped grooves 75. The second micro-motion sensor 76 is connected to the servo motor 6 through a controller.

[0066] Specifically, a positioner 7 is installed on the outside of the cylindrical box 1. The positioner 7 includes a housing 71, which is fixed to the surface of the cylindrical box 1. A torsion plate 72 is installed inside the housing 71. A shaft 16 rotates through the housing 71 and is fixedly connected to the torsion plate 72. Four telescopic grooves 73 are evenly opened around the edge of the torsion plate 72. Arc-shaped protrusions 74 are radially elastically slidably installed in each of the telescopic grooves 73 by springs. Four arc-shaped grooves 75 are evenly opened on the inner wall of the housing 71. The four arc-shaped protrusions 74 are correspondingly fitted into the four arc-shaped grooves 75. A second micro-motion sensor 76 is installed in one of the arc-shaped grooves 75. The second micro-motion sensor 76 is connected to the servo motor 6 through a controller.

[0067] Four sets of arc-shaped protrusions 74 engage with arc-shaped grooves 75 to keep the four sets of filter plates 2 in a precise working position. When the servo motor 6 drives the shaft 16 to rotate 90° to adjust the position of the filter plate 2, the torsion plate 72 rotates with the shaft 16. The arc-shaped protrusions 74 and the arc-shaped grooves 75 are pressed together, causing the arc-shaped protrusions 74 to retract into the telescopic grooves 73. When the arc-shaped protrusions 74 rotate 90° to align and engage with the next arc-shaped groove 75, the second micro-motion sensor 76 is activated, and the controller stops the servo motor 6 in time to ensure the precise repositioning of the filter plate 2.

[0068] The implementation principle of this embodiment is as follows: This device utilizes a shaft and a drive mechanism to achieve the rotational repositioning of the filter plate 2, solving the problem of easy clogging and inability to self-clean the filter components in the prior art. Through the reverse flushing of the liquid, the clogged filter plate 2 can be cleaned in a timely manner, ensuring smooth filtration and improving the efficiency of wastewater treatment.

[0069] Meanwhile, the activated sludge that has been flushed away is returned to the aeration tank, maintaining the amount of microorganisms in the aeration tank. This eliminates the need for frequent manual cleaning and maintenance, reducing labor costs and maintenance frequency. It has good practicality and innovation, and makes a significant improvement and contribution to existing industrial wastewater treatment technologies.

[0070] By setting up an overflow box 31 and a related liquid level feedback mechanism, not only can the surface deactivated sludge flocs be removed, but the liquid flow rate can also be precisely controlled according to the liquid level information, ensuring that the liquid in the first chamber can effectively flush the clogged filter plate 2, further improving the automation level and filtration effect of the device.

[0071] The liquid level monitoring device 8 can monitor the clogging status of the filter plate 2 in real time and automatically switch the liquid discharge path according to changes in the liquid level. When the filter plate 2 is clogged, its position is adjusted in a timely manner to ensure the continuous and stable operation of the device. The parallel design of multiple micro-motion sensors improves the reliability and timeliness of monitoring, further optimizes the performance of the device, and represents a significant improvement and refinement of existing technology.

[0072] The positioning device ensures the accuracy of the filter plate 2 during the repositioning process. Through the engagement of the arc-shaped protrusion 74 and the arc-shaped groove 75 and the triggering of the micro-motion sensor, the rotation angle of the shaft 16 can be accurately controlled, so that the filter plate 2 can accurately reach the predetermined position.

[0073] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0074] The above provides a detailed description of the activated sludge concentration maintenance device for industrial wastewater treatment provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of the above embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A device for maintaining the concentration of activated sludge in industrial wastewater treatment, comprising a cylindrical tank (1), wherein a shaft (16) is rotatably mounted on the shaft portion of the cylindrical tank (1), characterized in that, The cylindrical box (1) is provided with an inlet tank (3) and a drain pipe (5) on both sides respectively. A liquid pump (4) for introducing suspension into the inlet tank (3) is provided on one side of the inlet tank (3). The outer periphery of the shaft (16) is provided with four filter plates (2) in a cross shape, so that the inside of the cylindrical box (1) is divided into a first chamber (11), a second chamber (12), a third chamber (13) and a fourth chamber (14) in a counterclockwise direction. The first chamber (11) and the second chamber (12) are connected to the inlet tank (3) and the drain pipe (5). The cylindrical box (1) is equipped with a servo motor (6) for driving the shaft (16) to rotate, so that the shaft (16) rotates 90° in the direction that moves the filter plate (2) located between the first chamber (11) and the second chamber (12) to the fourth chamber (14) and the first chamber (11). The fourth chamber (14) is provided with a backflow port (15) on one side, so that the liquid in the first chamber (11) passes through the corresponding filter plate (2) upward and enters the fourth chamber (14) and is discharged from the backflow port (15).

2. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 1, characterized in that, An overflow tank (31) is provided on one side of the liquid inlet tank (3). An overflow plate is provided between the overflow tank (31) and the liquid inlet tank (3) so that the liquid in the liquid inlet tank (3) can overflow from the top of the overflow plate to the overflow tank (31). An overflow port (35) is provided on one side of the overflow tank (31). The overflow port (35) is connected to a drain pipe (5) through an overflow pipe (37).

3. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 2, characterized in that, The top of the overflow plate is provided with a blocking plate (32) that slides along the height direction, and a screw (36) is rotatably arranged on the surface of the overflow plate. The screw (36) is threadedly connected to one side surface of the blocking plate (32).

4. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 3, characterized in that, An impeller (33) is rotatably mounted on the side of the plug plate (32) near the overflow box (31). An encoder (34) is provided on the shaft of the impeller (33). The encoder (34) is connected to the liquid pump (4) through a controller.

5. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 3, characterized in that, The top height of the blocking plate (32) is higher than the upper surface of the backflow port (15).

6. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 1, characterized in that, The filter plate (2) includes a base frame (21), a cover frame (22) is attached and fixed to one side of the base frame (21), a filter screen (23) is provided between the cover frame (22) and the base frame (21), and a plurality of grid plates (24) are evenly arranged on the other side of the base frame (21). One end of the grid plate (24) is hinged to the base frame (21), and the grid plate (24) of the filter plate (2) located between the first chamber (11) and the second chamber (12) opens toward the second chamber (12).

7. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 6, characterized in that, The base frame (21) is fixed with a side strip (25) on its edge, and the side strip (25) has a plurality of lugs (26) on its edge, the lugs (26) being used to make the maximum opening angle of the grid plate (24) 90°.

8. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 1, characterized in that, The outer side of the cylindrical tank (1) is provided with a liquid level monitoring device (8). The liquid level monitoring device (8) includes a liquid storage tank (81). The liquid storage tank (81) has an inlet (82) in the middle. The inlet (82) is connected to the reflux port (15). The liquid storage tank (81) has a return port (83) and a guide port (84) on both sides respectively. The guide port (84) is higher than the return port (83) and the inlet port (82). The return port (83) is connected to the return pipe (9), the guide port (84) is connected to the drain pipe (5) through the guide pipe (91), the top of the storage tank (81) is equipped with a first micro-motion sensor (88), the first micro-motion sensor (88) is connected to the servo motor (6) through the controller, the storage tank (81) is provided with a float (85), the side of the float (85) near the return port (83) is connected to a baffle (86), the surface of the baffle (86) has a through hole (87); When the baffle (86) abuts against the bottom of the liquid storage tank (81), the inlet (87) is aligned with the return port (83), and the float (85) isolates the inlet (82) from the guide port (84) so ​​that the return port (83) passes through the inlet (82). When the liquid level rises and the float (85) moves upward to touch the first micro-motion sensor (88), the baffle (86) blocks the return port (83), and the float (85) is higher than the guide port (84) so ​​that the guide port (84) passes through the inlet (82).

9. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 8, characterized in that, There are several of the first micro-motion sensors (88), and the first micro-motion sensors (88) are connected in parallel with the controller.

10. The activated sludge concentration maintenance device for industrial wastewater treatment according to claim 1, characterized in that, The cylindrical box (1) is provided with a locator (7) on the outside. The locator (7) includes a shell (71) and a torsion plate (72) is provided inside the shell (71). The shaft (16) rotates through the shell (71) and is fixedly connected to the torsion plate (72). Four telescopic grooves (73) are evenly opened along the edge of the twisting disc (72). Arc-shaped protrusions (74) are provided in each of the telescopic grooves (73) by means of a spring for radial elastic sliding. Four arc-shaped grooves (75) are evenly opened on the inner wall of the outer shell (71). The four arc-shaped protrusions (74) are correspondingly inserted into the four arc-shaped grooves (75). A second micro-motion sensor (76) is installed in one of the arc-shaped grooves (75). The second micro-motion sensor (76) is connected to the servo motor (6) through a controller.

Images