A multi-stage biological treatment device for municipal sewage

Abstract

The application discloses a kind of multistage biological treatment equipment of municipal sewage, it is related to sewage biological treatment technical field, including treatment tank, and the inner wall of treatment tank is sealingly fixedly connected with partition plate, further including: fine separation mechanism, fine separation mechanism includes the separation cylinder of fixed connection on the upper end of partition plate, the inner wall of separation cylinder is sealingly rotatably connected with filter plate, and the inner wall of filter hole of filter plate is fixedly connected with mounting block, and the upper end of mounting block is rotatably connected with spline shaft.The present application drives impeller by using the kinetic energy of treatment water flow, and then drives aeration mechanism to work, realizes the automatic aeration without external power source, which not only significantly reduces the operating energy consumption, more importantly, the tiny bubbles generated by aeration can improve the mass transfer efficiency of dissolved oxygen, continuously provide sufficient oxygen for aerobic microorganisms attached to filter plate and filler, ensure the high activity of biofilm, thereby significantly improve the decomposition rate and removal efficiency of organic pollutants in sewage.

Description

Technical Field

[0001] This invention relates to the field of wastewater biological treatment technology, and in particular to a multi-stage biological treatment device for urban wastewater. Background Technology

[0002] With the acceleration of urbanization, the efficient and stable treatment of urban wastewater has become a major challenge in the field of environmental protection. Urban wastewater typically contains a large amount of suspended solids, colloids, and complex organic pollutants, and its treatment effectiveness is directly related to the ecological and environmental safety of the receiving water bodies.

[0003] Currently, biological treatment methods are widely used in urban wastewater treatment. The core of these methods lies in utilizing the metabolic activity of microorganisms to degrade organic pollutants in wastewater. A common biological treatment technology is the biofilm method, which involves microorganisms attaching to the surface of fixed packing material to form a biofilm. This method offers advantages such as high biomass, strong resistance to shock loads, and low sludge residue. However, traditional biofilm methods still have some problems: After long-term operation, the biofilm ages and thickens, leading to reduced activity of internal microorganisms and even detachment due to blockage, affecting the long-term stable operation of the system; solid impurities in wastewater, especially larger particles, if not effectively removed before entering the biological treatment unit, will wear down equipment, clog the water and air distribution system, and even occupy the effective volume of the bioreactor, seriously affecting the stable growth of microorganisms and treatment efficiency; to achieve multi-stage treatment, traditional processes typically require multiple independent structures connected in series, resulting in long process flows, large land areas, and high infrastructure investment. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing hydrocyclone separators, such as poor separation effect for fine and light particles and lack of biological treatment for organic pollutants, and to propose a multi-stage biological treatment device for urban sewage.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage biological treatment device for urban sewage includes a treatment tank, the inner wall of which is sealed and fixedly connected with a partition plate, and further includes:

[0007] The fine separation mechanism includes a separation cylinder fixedly connected to the upper end of a partition plate. A filter plate is rotatably connected to the inner wall of the separation cylinder. An installation block is fixedly connected to the inner wall of the filter holes of the filter plate. A spline shaft is rotatably connected to the upper end of the installation block. The lower end of the spline shaft passes through the lower end of the installation block and is fixedly connected to an adjusting cylinder. Multiple adjusting arc plates are rotatably connected to the side wall of the adjusting cylinder. Multiple arc-shaped grooves corresponding to the adjusting arc plates are opened on the side wall of the adjusting cylinder. A magnetic block is slidably connected to the inner wall of the arc-shaped groove. An arc-shaped rod is fixedly connected to the side wall of the magnetic block. The other end of the arc-shaped rod is fixedly connected to the side wall of the adjusting arc plate. A first spring is fixedly connected between the magnetic block and the inner wall of the arc-shaped groove.

[0008] The aeration mechanism includes two aeration boxes symmetrically and fixedly connected to the side wall of the mounting block 6. The side wall of the aeration box is provided with multiple one-way aeration holes. The inner wall of the aeration box is sealed and slidably connected with a sliding plug. The aeration box is connected to the hollow shaft through a one-way air inlet pipe. The inner wall of the aeration box is slidably connected with a slider. The side wall of the slider is fixedly connected with two connecting rods. The other end of the two connecting rods is fixedly connected to the sliding plug.

[0009] The separator is equipped with a drive mechanism that drives the filter plate to rotate, and the filter plate is equipped with a control component that controls the drive mechanism.

[0010] Preferably, the drive mechanism includes a hollow shaft rotatably connected to the upper end of the separation cylinder, the lower end of the hollow shaft being fixedly connected to the filter plate, a servo motor being fixedly connected to the top of the processing tank, a sector gear being fixedly connected to the output end of the servo motor, and a first gear cooperating with the sector gear being fixedly connected to the upper end of the hollow shaft.

[0011] Preferably, the control component includes two inlet chambers symmetrically opened at the lower end of the filter plate. Each inlet chamber has a rotating rod rotatably connected to its inner wall. Multiple impellers are fixedly connected to the side wall of the rotating rod. An outlet is opened in the inner wall of the inlet chamber. Two assembly chambers are symmetrically opened inside the filter plate. One end of the rotating rod extends into the assembly chamber. A speed sensor is installed on the inner wall of the assembly chamber. The speed sensor is connected to a servo motor through a PLC control circuit.

[0012] Preferably, a cleaning mechanism is installed on the mounting block. The cleaning mechanism includes a spline sleeve rotatably connected to the upper end of the mounting block. The spline sleeve is fitted onto the side wall of the spline shaft and extends through the mounting block. A second spring is fitted onto the side wall of the spline shaft. The two ends of the second spring are fixedly connected to the lower end of the spline sleeve and the upper end of the adjusting cylinder, respectively. A first bevel gear is fixedly connected to the side wall of the spline sleeve located inside the mounting block. A drive shaft is rotatably connected to the inner wall of the mounting block. A second bevel gear is fixedly connected to the side wall of the drive shaft. One end of a drive shaft located in one axial row extends into another mounting block and is fixedly connected to a second bevel gear. The first bevel gear and the second bevel gear are meshed. Two inner cavities are symmetrically opened inside the filter plate. One end of multiple drive shafts extends into the inner cavity and is fixedly connected to a second gear. Adjacent second gears are meshed. A drive wheel is fixedly connected to the side wall of the rotating rod located inside the assembly cavity. One end of one drive shaft extends into the assembly cavity and is fixedly connected to a driven wheel. The drive wheel is connected to the driven wheel via a synchronous belt.

[0013] Preferably, each arc-shaped groove has an electromagnet fixedly connected to its inner wall, a first conductive block and a second conductive block are symmetrically embedded at the upper end of the filter plate, and a conductive plate that cooperates with the first conductive block and the second conductive block is embedded in the separation cylinder. The electromagnet, the first conductive block, the second conductive block, the conductive plate and the external power supply are electrically connected by wires.

[0014] Preferably, the cleaning mechanism further includes a mounting bracket fixedly connected to the inner wall of the treatment tank. A first reciprocating screw is rotatably connected to the lower end of the mounting bracket. A rectangular block is threadedly connected to the side wall of the first reciprocating screw. A plurality of push rods corresponding one-to-one with the spline shaft are fixedly connected to the lower end of the rectangular block. A third gear that cooperates with the sector gear is fixedly connected to the side wall of the first reciprocating screw. A limiting sleeve is fixedly connected to the inner wall of the treatment tank, and the limiting sleeve is slidably sleeved on the side wall of two of the push rods.

[0015] Preferably, a discharge plate is fixedly connected to the upper end of the partition plate, and a discharge port is provided on the side wall of the treatment tank.

[0016] Preferably, the partition plate divides the interior of the treatment tank into two parts: a swirling chamber and an installation chamber. The fine separation mechanism, drive mechanism, cleaning mechanism, and control components are all located in the installation chamber.

[0017] Preferably, a water inlet pipe is fixedly connected to the side wall of the treatment tank, one end of which is connected to the vortex chamber; a vortex tube is fixedly connected to the lower end of the partition plate, one end of which is connected to the separation cylinder; an overflow pipe is fixedly connected to the upper end of the treatment tank, the lower end of which is connected to the separation cylinder; and a waste discharge pipe is fixedly connected to the lower end of the treatment tank.

[0018] Preferably, the aeration mechanism further includes a second reciprocating screw rotatably connected to the inner wall of the aeration box, the side wall of the second reciprocating screw being threadedly connected to the slider, and one end of the second reciprocating screw passing through the side wall of the aeration box and fixedly connected to the rotating rod.

[0019] The present invention has the following beneficial effects:

[0020] 1. By setting up an aeration mechanism, the impeller is driven by the kinetic energy of the treated water flow itself, which in turn drives the aeration mechanism to work, realizing automatic aeration without the need for an external power source. This not only significantly reduces operating energy consumption, but more importantly, the microbubbles generated by aeration can improve the mass transfer efficiency of dissolved oxygen, continuously providing sufficient oxygen for the aerobic microorganisms attached to the filter plates and packing, ensuring the high activity of the biofilm, thereby significantly improving the decomposition rate and removal efficiency of organic pollutants in wastewater.

[0021] 2. The combined effect of the water flow disturbance generated by aeration and the turbulence generated by the rotation of the regulating arc plate breaks the stagnant layer near the filter holes, creating a dynamic mixing environment. This greatly promotes the contact frequency and mass transfer efficiency of organic pollutants, dissolved oxygen and microorganisms on the biofilm surface in the wastewater. At the same time, the fine separation mechanism removes most of the solid impurities in advance, providing a relatively clean working environment for the biofilm and avoiding impurities covering and clogging the biofilm, thus achieving efficient synergy between physical separation and biodegradation.

[0022] 3. By setting up a fine separation mechanism, coarse particle filtration and fine filtration are integrated into one. The cyclone chamber first removes most of the coarse and heavy particles, reducing the subsequent filtration load. Then, the inner cyclone carrying fine particles rises and is subjected to secondary fine filtration by the filter plate in the separation cylinder. By adopting a multi-stage process of coarse separation and fine filtration, the shortcomings of traditional cyclone separation in removing fine particles are effectively overcome, and the water quality of the final effluent is significantly improved.

[0023] 4. By setting up a cleaning mechanism, the adjusting arc plate that rotates automatically under the drive of water flow generates strong shearing and disturbance inside the filter holes, which can actively break up and remove solid impurities that are about to clog the filter holes. This fundamentally changes the passive filtration mode of traditional filter plates. This dynamic filtration greatly slows down the speed of filter hole clogging, ensures the long-term stability of filtration flow and effect, and reduces maintenance needs caused by clogging.

[0024] 5. By setting up a drive mechanism and control components, when half of the filter plate is blocked, causing a decrease in water flow and a drop in impeller speed, the device can automatically sense and trigger the filter plate to rotate 180 degrees, switching the blocked side to the outside of the separation cylinder and cleaning it simultaneously, thus achieving uninterrupted filtration. Subsequently, the device automatically performs mechanical online cleaning on the switched-out blocked part, and the cleaned impurities are automatically collected and discharged. The entire sensing, switching, and cleaning process is completed automatically, achieving continuous unmanned operation, improving processing efficiency. Furthermore, the cleaning process of the filter element is combined with the biofilm renewal process. While periodically and automatically cleaning the filter plate to prevent blockage, it also simultaneously removes the aged and less active parts of the biofilm surface. This controllable erosion effect can effectively prevent excessive thickening of the biofilm, which would lead to anaerobic digestion and mass transfer obstruction in the inner layer, continuously exposing the highly active microbial layer inside, so that the biofilm always maintains vigorous metabolic activity, solving the problem of decreased processing efficiency due to biofilm aging in traditional biofilm methods.

[0025] 6. By setting up components such as electromagnets, conductive plates, first conductive blocks, and second conductive blocks, the gap between the arc plate and the inner wall of the filter holes can be adjusted by changing the current of the electromagnet, thereby dynamically adjusting the effective filter hole diameter. This allows for flexible adaptation to different water qualities or different treatment requirements, expanding the application range of the equipment. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a multi-stage biological treatment device for urban sewage proposed in this invention;

[0027] Figure 2 for Figure 1 A cross-sectional view of the intermediate processing tank;

[0028] Figure 3 for Figure 2 Cross-sectional view of the middle partition plate and the separation cylinder;

[0029] Figure 4 for Figure 3 A schematic diagram of the horizontal cross-sectional structure of the middle filter plate;

[0030] Figure 5 for Figure 3 A cross-sectional view of the mounting block and adjusting cylinder;

[0031] Figure 6 for Figure 3 Enlarged schematic diagram of the structure at point A in the diagram;

[0032] Figure 7 for Figure 3 Enlarged schematic diagram of the structure at point B in the diagram;

[0033] Figure 8 for Figure 3 Enlarged schematic diagram of the structure at point C;

[0034] Figure 9 for Figure 5 A magnified schematic diagram of the structure at point D in the diagram.

[0035] In the diagram: 1. Processing tank; 2. Divider plate; 201. Swirl chamber; 202. Mounting chamber; 3. Separation cylinder; 4. Hollow shaft; 5. Filter plate; 6. Mounting block; 7. Splined shaft; 8. Adjusting cylinder; 9. Adjusting arc plate; 10. Arc groove; 11. Magnetic block; 12. Arc rod; 13. First spring; 14. Electromagnet; 15. Servo motor; 16. Sector gear; 17. First gear; 18. Inlet chamber; 19. Rotating rod; 20. Impeller; 21. Drain port; 22. Speed ​​sensor; 23. Splined sleeve; 24. First bevel gear; 25. Drive shaft; 26. Second bevel gear; 27. Second... 28. Spring; 29. ​​Inner cavity; 30. Second gear; 31. Assembly cavity; 32. Driving wheel; 33. Driven wheel; 34. First conductive block; 35. Second conductive block; 36. Conductive plate; 37. Mounting bracket; 38. First reciprocating screw; 39. Rectangular block; 40. Push rod; 41. Third gear; 42. Limiting sleeve; 43. Discharge plate; 44. Discharge port; 45. Water inlet pipe; 46. Swirl pipe; 47. Overflow pipe; 48. Impurity discharge pipe; 49. Aeration box; 50. One-way aeration hole; 51. Sliding plug; 52. One-way air inlet pipe; 53. Sliding block; 54. Connecting rod; 55. First reciprocating screw. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Reference Figures 1-9 A multi-stage biological treatment device for urban sewage includes a treatment tank 1. A partition plate 2 is sealed and fixedly connected to the inner wall of the treatment tank 1, dividing the interior of the treatment tank 1 into two parts: a swirling chamber 201 and an installation chamber 202. The device also includes:

[0038] The fine separation mechanism includes a separation cylinder 3 fixedly connected to the upper end of the separator plate 2. A filter plate 5 is rotatably connected to the inner wall of the separation cylinder 3. An installation block 6 is fixedly connected to the inner wall of the filter holes of the filter plate 5. A spline shaft 7 is rotatably connected to the upper end of the installation block 6. The lower end of the spline shaft 7 passes through the lower end of the installation block 6 and is fixedly connected to an adjusting cylinder 8. Multiple adjusting arc plates 9 are rotatably connected to the side wall of the adjusting cylinder 8. Multiple arc grooves 10 corresponding to the adjusting arc plates 9 are opened on the side wall of the adjusting cylinder 8. A magnetic block 11 is slidably connected to the inner wall of the arc groove 10. An arc rod 12 is fixedly connected to the side wall of the magnetic block 11. The other end of the arc rod 12 is fixedly connected to the side wall of the adjusting arc plate 9. A first spring 13 is fixedly connected between the magnetic block 11 and the inner wall of the arc groove 10.

[0039] The aeration mechanism includes two aeration boxes 48 symmetrically and fixedly connected to the side wall of the mounting block 6. The side wall of the aeration box 48 is provided with multiple one-way aeration holes 49. The one-way aeration holes 49 only allow air inside the aeration box 48 to be discharged. The inner wall of the aeration box 48 is sealed and slidably connected with a sliding plug 50. The aeration box 48 is connected to the hollow shaft 4 through a one-way air inlet pipe 51. The inner wall of the aeration box 48 is slidably connected with a slider 52. The side wall of the slider 52 is fixedly connected with two connecting rods 53. The other end of each of the two connecting rods 53 is fixedly connected to the sliding plug 50.

[0040] A water inlet pipe 44 is fixedly connected to the side wall of the treatment tank 1. The other end of the water inlet pipe 44 can be connected to an external pump body. Water is pumped into the water inlet pipe 44 by the external pump body. One end of the water inlet pipe 44 is connected to the vortex chamber 201. A vortex tube 45 is fixedly connected to the lower end of the partition plate 2. One end of the vortex tube 45 is connected to the separation cylinder 3. An overflow pipe 46 is fixedly connected to the upper end of the treatment tank 1. The lower end of the overflow pipe 46 is connected to the separation cylinder 3. A waste discharge pipe 47 is fixedly connected to the lower end of the treatment tank 1.

[0041] Furthermore, one end of the inlet pipe 44 is connected to an external pump body. Fine biological suspended filler is added to the sewage beforehand. Then, the external pump body pumps the urban sewage and biological suspended filler into the vortex chamber 201 of the treatment tank 1 through the inlet pipe 44. At this time, the water flow enters the vortex chamber 201 tangentially and flows at high speed along the inner wall of the treatment tank 1, thereby forming a strong external vortex. The water flows downward and rotates towards the bottom of the treatment tank 1. In this downward and outward vortex, the coarse particles in the sewage are thrown towards the inner wall of the treatment tank 1 by a huge centrifugal force. After hitting the inner wall of the treatment tank 1, they lose kinetic energy and spiral downward along the inner wall of the treatment tank 1 under the action of gravity, and finally are discharged from the discharge pipe 47. This is to pre-separate the coarse particulate impurities contained in the urban drainage.

[0042] It is worth mentioning that when the water flows near the bottom of the treatment tank 1, due to the limitation of the diameter of the bottom channel of the treatment tank 1 and the continuity of the fluid, the remaining water flow will change direction and form an upward internal vortex. This upward internal vortex mainly carries fine particles that cannot overcome the drag force of the fluid by centrifugal force. It flows upward through the vortex tube 45 and the separation cylinder 3, and then is discharged from the overflow pipe 46. When the water flows through the separation cylinder 3, the filter plate 5 will filter and remove the fine particles in the water flow, thereby performing a fine solid-liquid separation of the sewage again. Compared with the existing vortex separator, it increases the separation of fine solid impurities and improves the separation effect.

[0043] Furthermore, fine biological suspended packing material will also enter the separation cylinder 3, where it will form a biofilm on the surface of the filter plate 5 and in its filter holes. As a result, the organic pollutants in the wastewater will be decomposed by the microorganisms in the biofilm, thereby biologically treating the organic pollutants in the wastewater and ensuring the wastewater discharge standards.

[0044] A drive mechanism for rotating the filter plate 5 is installed on the separation cylinder 3, and a control component for controlling the drive mechanism is installed on the filter plate 5.

[0045] The drive mechanism includes a hollow shaft 4 rotatably connected to the upper end of the separation cylinder 3. The lower end of the hollow shaft 4 is fixedly connected to the filter plate 5. A servo motor 15 is fixedly connected to the top of the processing tank 1. A sector gear 16 is fixedly connected to the output end of the servo motor 15. A first gear 17 that meshes with the sector gear 16 is fixedly connected to the upper end of the hollow shaft 4. By setting the transmission ratio between the sector gear 16 and the first gear 17, the first gear 17 can rotate 180 degrees during the meshing of the sector gear 16 and the first gear 17.

[0046] The control assembly includes two inlet chambers 18 symmetrically located at the lower end of the filter plate 5. Each inlet chamber 18 has a rotating rod 19 rotatably connected to its inner wall. Multiple impellers 20 are fixedly connected to the side wall of the rotating rod 19. An outlet 21 is provided on the inner wall of the inlet chamber 18. Two assembly chambers 30 are symmetrically located inside the filter plate 5. One end of the rotating rod 19 extends into the assembly chamber 30. A speed sensor 22 is installed on the inner wall of the assembly chamber 30. The speed sensor 22 is connected to the servo motor 15 through a PLC control circuit.

[0047] The aeration mechanism also includes a second reciprocating screw 54 rotatably connected to the inner wall of the aeration box 48. The side wall of the second reciprocating screw 54 is threadedly connected to the slider 52, and one end of the second reciprocating screw 54 passes through the side wall of the aeration box 48 and is fixedly connected to the rotating rod 19.

[0048] Furthermore, the rotation of the rotating rod 19 will drive the second reciprocating screw 54 to rotate, thereby causing the slider 52 to slide back and forth in the aeration box 48. The slider 52 will drive the sliding plug 50 to slide back and forth in a sealing manner through the connecting rod 53. At this time, under the action of the sliding plug 50, the external air will be drawn into the aeration box 48 through the hollow shaft 4 and the one-way air inlet pipe 51. Then the air will be ejected through multiple one-way aeration holes 49 to aerate the sewage in the separation cylinder 3. On the one hand, aeration can increase the oxygen content in the sewage, providing sufficient oxygen for microorganisms to decompose organic pollutants and promoting the biological treatment of organic pollutants. On the other hand, the bubbles generated by aeration can play a role in turbulence, promoting water flow and facilitating more sufficient contact between microorganisms and organic pollutants, thereby improving the biological treatment effect.

[0049] A cleaning mechanism is installed on the mounting block 6. The cleaning mechanism includes a spline sleeve 23 rotatably connected to the upper end of the mounting block 6. The spline sleeve 23 is fitted onto the side wall of the spline shaft 7 and passes through the mounting block 6. A second spring 27 is fitted onto the side wall of the spline shaft 7. The two ends of the second spring 27 are fixedly connected to the lower end of the spline sleeve 23 and the upper end of the adjusting cylinder 8, respectively. A first bevel gear 24 is fixedly connected to the side wall of the spline sleeve 23 inside the mounting block 6. A drive shaft 25 is rotatably connected to the inner wall of the mounting block 6. A second bevel gear 26 is fixedly connected to the side wall of the drive shaft 25. One of the drive shafts is located in a row along the axial direction. One end of shaft 25 extends into another mounting block 6 and is fixedly connected to a second bevel gear 26. The first bevel gear 24 meshes with the second bevel gear 26. Two inner cavities 28 are symmetrically opened in the filter plate 5. One end of multiple drive shafts 25 extends into the inner cavity 28 and is fixedly connected to a second gear 29, and two adjacent second gears 29 mesh with each other. The rotating rod 19 is fixedly connected to the side wall of the assembly cavity 30 with a drive wheel 31. One end of one drive shaft 25 extends into the assembly cavity 30 and is fixedly connected to a driven wheel 32. The drive wheel 31 is connected to the driven wheel 32 through a synchronous belt.

[0050] Furthermore, when the filter plate 5 filters fine particles, when the water flow in the cyclone chamber 201 enters the separation cylinder 3 through the cyclone pipe 45, some of the water flow will enter the inlet chamber 18 and impact the impeller 20, causing the impeller 20 to rotate. This, in turn, causes the rotating rod 19 to rotate, which in turn causes the driving wheel 31 to rotate, which in turn causes the driven wheel 32 to rotate, which in turn causes the drive shaft 25 to rotate. The drive shaft 25 will then drive other second gears 29 to rotate through the second gear 29, thus causing all the drive shafts 25 to rotate. The drive shaft 25 will then drive the first bevel gear 24 to rotate through the second bevel gear 26, which in turn drives the flower... When the key sleeve 23 rotates, the spline sleeve 23 drives the spline shaft 7 to rotate, which in turn drives the adjusting cylinder 8 to rotate, and in turn drives multiple adjusting arc plates 9 to rotate. The rotation of the adjusting arc plates 9 can disrupt the stable laminar boundary layer at the filter inlet, generating strong turbulence and disturbance. This makes it difficult for solid particles to adhere stably to the pore wall of the filter. Furthermore, the conical design of the adjusting arc plates 9 can guide solid particles from the narrow orifice to a wider internal space. Combined with centrifugal force, the solid particles are thrown into the water flow below, which can, to a certain extent, prevent solid particle impurities from clogging the filter pores of the filter plate 5 and ensure the filtration effect.

[0051] Each arc-shaped groove 10 has an electromagnet 14 fixedly connected to its inner wall. The filter plate 5 has a first conductive block 33 and a second conductive block 34 symmetrically embedded at its upper end. The separation cylinder 3 has a conductive plate 35 that cooperates with the first conductive block 33 and the second conductive block 34. The electromagnet 14, the first conductive block 33, the second conductive block 34, the conductive plate 35 and the external power supply are electrically connected by wires.

[0052] Furthermore, by controlling the magnitude of the current supplied to the electromagnet 14, the electromagnet 14 can generate magnetic fields of different intensities, thereby changing the magnetic attraction force of the electromagnet 14 on the magnetic block 11. When the current supplied to the electromagnet 14 is smaller, the magnetic attraction force of the electromagnet 14 on the magnetic block 11 is smaller. Consequently, the magnetic block 11 will move closer to the outer position of the arc groove 10 under the action of the first spring 13. Then, the magnetic block 11 will drive the adjusting arc plate 9 to rotate closer to the inner wall of the filter hole of the filter plate 5 through the arc rod 12. This makes the adjusting arc plate 9 closer to the inner wall of the filter hole of the filter plate 5, thereby making the filter hole pores of the filter plate 5 smaller, which can filter finer solid particle impurities. Therefore, the filter hole pores of the filter plate 5 can be adjusted according to the actual filtration requirements to facilitate the filtration of solid particle impurities of different sizes, making the adaptability wider.

[0053] It is worth mentioning that as the filtration time increases, the amount of water flowing through the separator 3 increases, and more solid impurities are trapped below the filter plate 5. This continuous increase in solid impurities causes them to surge into the filter holes, gradually clogging them. As the clogging worsens, the water flow into the separator 3 decreases, causing the impeller 20 to rotate at a gradually decreasing speed. When the impeller 20's speed drops to a certain level, it indicates that the filter holes in the filter plate 5 are severely clogged. The speed sensor 22, upon sensing this decrease in the rotation speed of the rotating rod 19, sends a signal. The speed sensor 22 then controls the servo motor 15 via the PLC control circuit to rotate the sector gear 16 one revolution. When the sector gear 16 rotates to... When meshing with the first gear 17, the sector gear 16 will drive the first gear 17 to rotate, thereby driving the hollow shaft 4 to rotate and the filter plate 5 to rotate. When the sector gear 16 rotates to disengage from the first gear 17, the hollow shaft 4 will stop rotating. During the meshing of the sector gear 16 and the first gear 17, the first gear 17 can be driven to rotate 180 degrees, thereby driving the filter plate 5 to rotate 180 degrees. At this time, the blocked half of the filter plate 5 will rotate to the outside of the separation cylinder 3, while the other clean half will rotate into the separation cylinder 3 to continue filtration. Therefore, when the filter holes are blocked, the filter plate 5 will be automatically switched to the other half of the filter plate 5 into the separation cylinder 3, so that the filtration work is uninterrupted and there is no need for manual real-time monitoring of the use of the filter plate 5, nor is there a need for manual replacement of the filter plate 5.

[0054] The cleaning mechanism also includes a mounting bracket 36 fixedly connected to the inner wall of the treatment tank 1. A first reciprocating screw 37 is rotatably connected to the lower end of the mounting bracket 36. A rectangular block 38 is threadedly connected to the side wall of the first reciprocating screw 37. A plurality of push rods 39 corresponding one-to-one with the spline shaft 7 are fixedly connected to the lower end of the rectangular block 38. A third gear 40 that cooperates with the sector gear 16 is fixedly connected to the side wall of the first reciprocating screw 37. By setting the transmission ratio between the sector gear 16 and the third gear 40, the third gear 40 drives the first reciprocating screw 37 to rotate during the meshing of the sector gear 16 and the third gear 40, which can make the rectangular block 38 reciprocate up and down once. A limiting sleeve 41 is fixedly connected to the inner wall of the treatment tank 1, and the limiting sleeve 41 is slidably sleeved on the side wall of two of the push rods 39.

[0055] A discharge plate 42 is fixedly connected to the upper end of the partition plate 2, and a discharge port 43 is opened on the side wall of the processing tank 1.

[0056] Furthermore, when the blocked half of the filter plate 5 rotates to the outside of the separation cylinder 3, as the sector gear 16 continues to rotate, it will mesh with the third gear 40, thereby driving the third gear 40 to rotate, which in turn drives the first reciprocating screw 37 to rotate, thus causing the rectangular block 38 to move downwards, which in turn drives multiple push rods 39 to move downwards. The multiple push rods 39 will push multiple spline shafts 7 to slide downwards, thereby driving the adjusting cylinder 8 and multiple adjusting arc plates 9 to move downwards. At this time, the first conductive block 33 rotates 180 degrees with the filter plate 5. After no longer contacting the conductive plate 35, the electromagnet 14 located outside the separation cylinder 3 will be de-energized and lose its magnetism. Consequently, the adjusting arc plate 9 will abut against the inner wall of the filter holes on the filter plate 5 under the action of the first spring 13. As the adjusting cylinder 8 and the adjusting arc plate 9 move downward, they will push out the solid impurities attached to the inner wall of the filter holes. At this time, because the impeller 20 located inside the separation cylinder 3 will rotate under the impact of the water flow, it will drive all the adjusting cylinders 8 and the adjusting arc plate 9 to rotate. Therefore, the adjusting arc plate 9 will rotate synchronously while moving downward. The rotating adjusting arc plate 9 generates shearing force, breaking down solid impurities attached to the inner wall of the filter holes and disrupting their stable structure, thereby improving the cleaning effect of the filter holes. Furthermore, during the cleaning of the filter plate 5, the outermost layer of the biofilm inside and on the surface of the filter holes is also removed, thus removing the aged layer of the biofilm and ensuring that the core bacterial community inside can contact organic pollutants, thereby improving the biological treatment efficiency. After being pushed out of the filter holes, the solid impurities fall onto the upper end of the discharge plate 42, then roll down to the discharge port 43 and are discharged through the discharge port 43. Furthermore, since the one-way aeration hole 49 is set at an angle downwards, during discharge, the one-way aeration hole 49 will spray an airflow at an angle downwards, blowing the impurities on the discharge plate 42 toward the discharge port 43, which facilitates efficient impurity discharge. When the regulating cylinder 8 moves to the bottom, the rectangular block 38 will move in the opposite direction to reset, thereby driving the push rod 39 to move in the opposite direction to reset. At this time, the regulating cylinder 8 will move upwards to reset under the action of the second spring 27 and re-enter the filter hole. Then, the sector gear 16 will separate and mesh with the third gear 40, and then the servo motor 15 will stop rotating.

[0057] The fine separation mechanism, drive mechanism, cleaning mechanism, and control components are all located within the mounting cavity 202.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage biological treatment device for urban sewage, comprising a treatment tank (1), wherein a partition plate (2) is fixedly and sealed to the inner wall of the treatment tank (1), characterized in that, Also includes: The fine separation mechanism includes a separation cylinder (3) fixedly connected to the upper end of the partition plate (2). A filter plate (5) is rotatably connected to the inner wall of the separation cylinder (3). An installation block (6) is fixedly connected to the inner wall of the filter hole of the filter plate (5). A spline shaft (7) is rotatably connected to the upper end of the installation block (6). An adjusting cylinder (8) is fixedly connected to the lower end of the spline shaft (7) through the lower end of the installation block (6). A plurality of adjusting arc plates (9) are rotatably connected to the side wall of the adjusting cylinder (8). A plurality of arc grooves (10) corresponding to the adjusting arc plates (9) are opened on the side wall of the adjusting cylinder (8). A magnetic block (11) is slidably connected to the inner wall of the arc groove (10). An arc rod (12) is fixedly connected to the side wall of the magnetic block (11). The other end of the arc rod (12) is fixedly connected to the side wall of the adjusting arc plate (9). A first spring (13) is fixedly connected between the magnetic block (11) and the inner wall of the arc groove (10). An aeration mechanism includes two aeration boxes (48) symmetrically fixedly connected to the side wall of the mounting block (6). The side wall of the aeration box (48) is provided with a plurality of one-way aeration holes (49). The inner wall of the aeration box (48) is sealed and slidably connected with a sliding plug (50). The aeration box (48) is connected to the hollow shaft (4) through a one-way air inlet pipe (51). The inner wall of the aeration box (48) is slidably connected with a slider (52). The side wall of the slider (52) is fixedly connected with two connecting rods (53). The other end of the two connecting rods (53) is fixedly connected to the sliding plug (50). The separation cylinder (3) is equipped with a drive mechanism for rotating the filter plate (5), and the filter plate (5) is equipped with a control component for controlling the drive mechanism.

2. The multi-stage biological treatment equipment for urban sewage according to claim 1, characterized in that: The driving mechanism includes a hollow shaft (4) rotatably connected to the upper end of the separation cylinder (3), the lower end of the hollow shaft (4) is fixedly connected to the filter plate (5), a servo motor (15) is fixedly connected to the top of the processing tank (1), a sector gear (16) is fixedly connected to the output end of the servo motor (15), and a first gear (17) that cooperates with the sector gear (16) is fixedly connected to the upper end of the hollow shaft (4).

3. The multi-stage biological treatment equipment for urban sewage according to claim 2, characterized in that: The control component includes two inlet chambers (18) symmetrically opened at the lower end of the filter plate (5). Each inlet chamber (18) has a rotating rod (19) rotatably connected to its inner wall. Multiple impellers (20) are fixedly connected to the side wall of the rotating rod (19). An outlet (21) is opened on the inner wall of the inlet chamber (18). Two assembly chambers (30) are symmetrically opened in the filter plate (5). One end of the rotating rod (19) extends into the assembly chamber (30). A speed sensor (22) is installed on the inner wall of the assembly chamber (30). The speed sensor (22) is connected to the servo motor (15) through a PLC control circuit.

4. A multi-stage biological treatment device for urban sewage according to claim 3, characterized in that: A cleaning mechanism is installed on the mounting block (6). The cleaning mechanism includes a spline sleeve (23) rotatably connected to the upper end of the mounting block (6). The spline sleeve (23) is fitted onto the side wall of the spline shaft (7) and passes through the mounting block (6). A second spring (27) is fitted onto the side wall of the spline shaft (7). The two ends of the second spring (27) are fixedly connected to the lower end of the spline sleeve (23) and the upper end of the adjusting cylinder (8), respectively. A first bevel gear (24) is fixedly connected to the side wall of the spline sleeve (23) inside the mounting block (6). A drive shaft (25) is rotatably connected to the inner wall of the mounting block (6). A second bevel gear (26) is fixedly connected to the side wall of the drive shaft (25). One of the bevel gears located in one axial row is... One end of the drive shaft (25) extends into another mounting block (6) and is fixedly connected to a second bevel gear (26). The first bevel gear (24) meshes with the second bevel gear (26). Two inner cavities (28) are symmetrically opened in the filter plate (5). One end of multiple drive shafts (25) extends into the inner cavity (28) and is fixedly connected to a second gear (29). Two adjacent second gears (29) mesh with each other. The rotating rod (19) is located on the side wall of the assembly cavity (30) and is fixedly connected to a drive wheel (31). One end of one drive shaft (25) extends into the assembly cavity (30) and is fixedly connected to a driven wheel (32). The drive wheel (31) is connected to the driven wheel (32) through a synchronous belt.

5. A multi-stage biological treatment device for urban sewage according to claim 1, characterized in that: Each of the arc-shaped grooves (10) is fixedly connected to an electromagnet (14) on its inner wall. The filter plate (5) is symmetrically embedded with a first conductive block (33) and a second conductive block (34) on its upper end. The separation cylinder (3) is embedded with a conductive plate (35) that cooperates with the first conductive block (33) and the second conductive block (34). The electromagnet (14), the first conductive block (33), the second conductive block (34), the conductive plate (35) and the external power supply are electrically connected by wires.

6. A multi-stage biological treatment device for urban sewage according to claim 4, characterized in that: The cleaning mechanism also includes a mounting bracket (36) fixedly connected to the inner wall of the treatment tank (1). The lower end of the mounting bracket (36) is rotatably connected to a first reciprocating screw (37). The side wall of the first reciprocating screw (37) is threaded with a rectangular block (38). The lower end of the rectangular block (38) is fixedly connected to a plurality of push rods (39) corresponding one-to-one with the spline shaft (7). The side wall of the first reciprocating screw (37) is fixedly connected to a third gear (40) that cooperates with the sector gear (16). The inner wall of the treatment tank (1) is fixedly connected to a limiting sleeve (41), and the limiting sleeve (41) is slidably sleeved on the side wall of two of the push rods (39).

7. A multi-stage biological treatment device for urban sewage according to claim 1, characterized in that: The upper end of the partition plate (2) is fixedly connected to the discharge plate (42), and the side wall of the processing tank (1) is provided with a discharge port (43).

8. A multi-stage biological treatment device for urban sewage according to claim 6, characterized in that: The partition plate (2) divides the interior of the processing tank (1) into two parts: a swirling chamber (201) and an installation chamber (202). The fine separation mechanism, the driving mechanism, the cleaning mechanism, and the control components are all located in the installation chamber (202).

9. A multi-stage biological treatment device for urban sewage according to claim 8, characterized in that: The treatment tank (1) is fixedly connected to a water inlet pipe (44), one end of which is connected to a vortex chamber (201). The lower end of the partition plate (2) is fixedly connected to a vortex tube (45), one end of which is connected to a separation cylinder (3). The upper end of the treatment tank (1) is fixedly connected to an overflow pipe (46), the lower end of which is connected to a separation cylinder (3). The lower end of the treatment tank (1) is fixedly connected to a waste discharge pipe (47).

10. A multi-stage biological treatment device for urban sewage according to claim 3, characterized in that: The aeration mechanism further includes a second reciprocating screw (54) rotatably connected to the inner wall of the aeration box (48). The side wall of the second reciprocating screw (54) is threadedly connected to the slider (52), and one end of the second reciprocating screw (54) passes through the side wall of the aeration box (48) and is fixedly connected to the rotating rod (19).

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