Low-carbon-nitrogen-ratio multi-point backflow pulse water distribution inverted nitrogen and phosphorus removal reactor

Abstract

The invention relates to a low-carbon-nitrogen-ratio multi-point backflow pulse water distribution inverted nitrogen and phosphorus removal reactor, and relates to the technical field of water treatment.The low-carbon-nitrogen-ratio multi-point backflow pulse water distribution inverted nitrogen and phosphorus removal reactor comprises a main water pool and a water return system, four partition plates are arranged in the main water pool, and the four partition plates divide the main water pool into five branch water pools; the five water distribution tanks are a first-stage anoxic tank, an anaerobic tank, a first-stage aerobic tank, a second-stage anoxic tank and a second-stage aerobic tank in sequence; the water return system comprises a water collecting tank and four water return pipes; the four water return pipes are respectively a first water return pipe, a second water return pipe, a third water return pipe and a fourth water return pipe; the water inlet end of the first water return pipe is communicated with the primary aerobic tank, and the water outlet end is communicated with the water collecting tank; the water inlet end of the second water return pipe is connected with the secondary aerobic tank, and the water outlet end is communicated with the water collecting tank; the water inlet end of the third water return pipe is communicated with the water collecting tank, and the water outlet end is communicated with the primary anoxic tank; the water inlet end of the fourth water return pipe is communicated with the water collecting tank, and the water outlet end is communicated with the secondary anoxic tank. The device has the effect of reducing the occupied area.

Description

Technical Field

[0001] The present application relates to the technical field of water treatment, and in particular to a low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor. Background Art

[0002] The field of wastewater treatment technology has made significant progress in recent years, especially in urban sewage treatment plants and industrial wastewater treatment. Traditional sewage treatment processes such as A2 / O, AO, SBR, etc., perform well in removing organic matter and can effectively reduce chemical oxygen demand (COD) and biological oxygen demand (BOD5). However, with the continuous improvement of environmental protection requirements, these traditional processes face many challenges in treating wastewater with low carbon-nitrogen ratio and wastewater with high total nitrogen and total phosphorus content.

[0003] At present, in order to improve the treatment intensity, multiple levels of pools are arranged continuously. Each level of pools includes anoxic pools, anaerobic pools and aerobic pools. Therefore, the multiple levels of pools may include multiple anoxic pools, anaerobic pools and aerobic pools. The sewage flows through the multiple levels of pools in turn for water treatment. Finally, the water in the pool is discharged to obtain treated water.

[0004] With respect to the above-mentioned related technologies, the arrangement of the multi-stage water tank increases the floor space of the equipment in the factory. Therefore, providing a device that can reduce the floor space is an urgent problem to be solved. Summary of the invention

[0005] In order to reduce the floor space occupied, the present application provides a low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor.

[0006] The present application provides a low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor adopts the following technical solution: A low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor, comprising a main water pool and a water return system, wherein four partitions are arranged in the main water pool, and the four partitions are spaced apart in a first direction to divide the main water pool into five water sub-pools in the first direction; In the first direction, the five water diversion tanks are the primary anoxic tank, the anaerobic tank, the primary aerobic tank, the secondary anoxic tank and the secondary aerobic tank, respectively, and the four partitions are the first partition, the second partition, the third partition and the fourth partition; The water return system includes a water collection tank and four water return pipes; The four water return pipes are respectively a first water return pipe, a second water return pipe, a third water return pipe and a fourth water return pipe; The water inlet end of the first water return pipe is connected to the primary aerobic tank, and the water outlet end is connected to the water collection tank; The water inlet end of the second water return pipe is connected to the secondary aerobic tank, and the water outlet end is connected to the water collection tank; The water inlet end of the third water return pipe is connected to the water collection tank, and the water outlet end is connected to the primary anoxic tank; The water inlet end of the fourth water return pipe is connected to the water collection tank, and the water outlet end is connected to the secondary anoxic tank.

[0007] By adopting the above technical scheme, the reactor realizes the integration of multiple functional areas in one main water tank, reducing the equipment footprint; specifically, by setting multiple partitions inside the main water tank, the main water tank is divided into a primary anoxic tank, an anaerobic tank, a primary aerobic tank, a secondary anoxic tank and a secondary aerobic tank, so that the various functional areas can be arranged in an orderly manner in the same main water tank, avoiding the scattered layout of traditional multi-stage water tanks, thereby effectively saving space; at the same time, by setting up a return water system, the water from the primary aerobic tank and the secondary aerobic tank can be returned to the primary anoxic tank and the secondary anoxic tank, further optimizing the water flow path and improving the treatment efficiency. It is particularly suitable for the treatment of low carbon-nitrogen ratio wastewater and effectively improves the effect of nitrogen removal and phosphorus removal.

[0008] Optionally, the first-level anoxic tank and the second-level anoxic tank are each provided with a claw-type water distributor, and the claw-type water distributor includes a feed end and a claw-type water outlet end; The feed end of the claw-type water distributor is fixedly connected to the main water pool, and the feed end of the claw-type water distributor is provided with an enhanced pulse unit for oscillating the liquid flowing through the claw-type water distributor; The claw-type water outlet end of the claw-type water distributor is located at the bottom of the water distribution pool.

[0009] By adopting the above technical solution, the setting of the claw-type water distributor makes the water flow entering the anoxic tank more evenly dispersed, thereby improving the efficiency of the contact between the water flow and the microorganisms; at the same time, the oscillation effect of the enhanced pulse unit further enhances the mixing effect of the water flow, which helps to improve the removal rate of pollutants.

[0010] Optionally, a carrier frame is fixedly connected to each corresponding one in the primary anoxic tank and the secondary anoxic tank, and a filler microorganism carrier is provided on the carrier frame.

[0011] By adopting the above technical solution, the filler microbial carrier can increase the attachment area of ​​microorganisms and improve the concentration of microorganisms, thereby enhancing the ability to degrade pollutants; in particular, the setting of the filler microbial carrier makes the microorganisms in the primary anoxic tank and the secondary anoxic tank more active, which helps to more effectively remove ammonia nitrogen and organic matter, and improve the treatment efficiency of the entire system.

[0012] Optionally, a drainage hole is provided on the top of the first partition, and a water distribution pipe is provided in the anaerobic tank; The water inlet end of the water distribution pipe is fixedly connected to the first partition plate and communicated with the drainage hole; The water outlet end of the water distribution pipe is located at the bottom of the anaerobic tank; In the depth direction of the water diversion tank, the filler microorganism carrier is located between the claw-type water outlet end and the drainage hole.

[0013] By adopting the above technical solution, the drainage holes arranged on the top of the first partition can effectively guide the water flow in the first-level anoxic tank into the anaerobic tank. At the same time, the arrangement of the water distribution pipe makes the water flow evenly distributed at the bottom of the anaerobic tank. When the water in the anaerobic tank flows upward, it can enhance the mixing effect in the anaerobic tank and improve the contact efficiency between microorganisms and sewage.

[0014] Optionally, a first water outlet weir is formed on the top of the second partition, and the first water outlet weir connects the anaerobic tank and the primary aerobic tank.

[0015] By adopting the above technical solution, since the first outlet weir is located above the partition, the water in the anaerobic tank will flow into the primary aerobic tank from the upper position and flow from top to bottom in the primary aerobic tank, so it can react with oxygen more fully.

[0016] Optionally, the third partition is formed with a water outlet at the bottom of the pool, and the water outlet is connected to the primary aerobic pool and the secondary anoxic pool.

[0017] By adopting the above technical solution, the water in the primary aerobic tank and the water discharged from the claw-type water distributor in the secondary anoxic tank flow upward and react with the microorganisms, and they can react more fully.

[0018] Optionally, a second water outlet weir is formed on the top of the fourth partition plate, and the second water outlet weir connects the secondary anoxic tank and the secondary aerobic tank.

[0019] By adopting the above technical solution, water is discharged from the second water outlet weir into the secondary aerobic pool. During the downward flow of water, the reactants in the water can fully react with oxygen.

[0020] Optionally, it further comprises a plurality of aeration systems, wherein the primary aerobic tank and the secondary aerobic tank are each provided with the corresponding aeration system; The aeration systems in the primary aerobic tank and the secondary aerobic tank are both located at the bottom of the tank.

[0021] By adopting the above technical solution, the aeration system installed in the primary aerobic tank and the secondary aerobic tank can effectively increase the dissolved oxygen concentration in the water body, promote the growth and activity of aerobic microorganisms, and thus improve the removal efficiency of organic matter and ammonia nitrogen; at the same time, the aeration system is located at the bottom of the tank, which can ensure the uniform distribution of oxygen in the entire water body, reduce local hypoxia, and further improve the treatment effect.

[0022] Optionally, a stirring component is also included, and the stirring component includes: A stirring ring, the stirring ring rotates around its own central axis and is connected to the bottom wall of the anaerobic tank, and the central axis of the stirring ring is parallel to the depth direction of the anaerobic tank; and A stirring block is fixedly connected to the outer peripheral wall of the stirring ring.

[0023] By adopting the above technical solution, the setting of the stirring assembly makes the substances in the anaerobic tank mixed more evenly, thereby improving the efficiency of the anaerobic reaction and helping to better remove organic matter and ammonia nitrogen. Specifically, the stirring rotates around its own central axis, driving the stirring block to rotate on the outer peripheral wall, which can effectively promote the flow of sewage in the tank, avoid stagnation in local areas, make microorganisms fully contact with sewage, and enhance the reaction effect.

[0024] Optionally, the stirring assembly further comprises: A stirring rod, the stirring rod is connected to the stirring ring and is rotatable around a first axis, the first axis is parallel to the depth direction of the anaerobic tank, and the first axis is located to the side of the central axis of the stirring ring; and A blade is fixedly connected to the stirring rod.

[0025] By adopting the above technical solution, the stirring rod is connected to the stirring ring by rotating around the first axis, so that the stirring rod can achieve a more uniform stirring effect inside the anaerobic tank, thereby promoting sufficient contact between the microorganisms and sewage in the anaerobic tank and improving the degradation efficiency of pollutants; at the same time, the blades are fixedly connected to the stirring rod, which further enhances the stirring effect and ensures that the sewage is mixed more evenly in the anaerobic tank, which helps to improve the processing capacity and stability of the entire system.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application integrates multiple functional areas in one main water pool and adopts a reflux system to reduce the equipment footprint; 2. The setting of the claw-type water distributor makes the water flow entering the anoxic tank more evenly dispersed, improving the efficiency of the contact between the water flow and the microorganisms; at the same time, the oscillation effect of the enhanced pulse unit further enhances the mixing effect of the water flow, which helps to improve the removal rate of pollutants; 3. The setting of the stirring component makes the materials in the anaerobic tank mixed more evenly, thereby improving the efficiency of the anaerobic reaction and helping to better remove organic matter and ammonia nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic diagram of the structure of the carrier frame in the embodiment of the present application; Figure 3 is a schematic structural diagram of a stirring assembly in an embodiment of the present application; Figure 4 is a schematic diagram of the structure of the first drive assembly in an embodiment of the present application; Figure 5 is a schematic diagram of the structure of the second drive assembly in an embodiment of the present application; Figure 6 It is a schematic diagram of the structure of the water return system in the embodiment of the present application.

[0028] Explanation of reference numerals: 1. Main water tank; 11. Water distribution tank; 11a. Primary anoxic tank; 11b. Anaerobic tank; 11c. Primary aerobic tank; 11d. Secondary anoxic tank; 11e. Secondary aerobic tank; 12. Partition; 12a. First partition; 121. Drain hole; 12b. Second partition; 122. First outlet weir; 12c. Third partition; 123. Outlet hole; 12d. Fourth partition; 124. Second outlet weir; 13. Filler microorganism carrier; 14. Carrier frame; 15. Water distribution pipe; 16. Top plate; 2. Claw water distributor; 21. Feed end; 22. Claw outlet end; 23. Intensified pulse unit ; 24. Water inlet pipe; 241. First valve; 3. Aeration system; 4. Stirring assembly; 41. Stirring ring; 411. Connecting ring; 42. Stirring block; 43. Stirring rod; 44. Blade; 5. First drive assembly; 51. Motor; 52. First gear; 521. Rotating shaft; 522. Rotating hole; 7. Isolation plate; 71. Avoidance hole; 8. Second drive assembly; 81. Second gear; 82. Connecting shaft; 83. Third gear; 9. Return water system; 91. Return water pipe; 91a. First return water pipe; 91b. Second return water pipe; 91c. Third return water pipe; 91d. Fourth return water pipe; 92. Collecting tank. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 This application is described in further detail.

[0030] The present application discloses a low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor. Figure 1 and Figure 2The low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor comprises a main water pool 1, a plurality of claw-type water distributors 2 and a plurality of aeration systems 3; in the present disclosure, a top plate 16 is fixedly connected to the top of the main water pool 1; Four partitions 12 are arranged in the main water pool 1. The first direction is specifically the horizontal direction. The partitions 12 in the present disclosure are in the vertical direction, and the partitions 12 are arranged perpendicular to the first direction. The four partitions 12 are spaced apart in the first direction to divide the main water pool 1 into five sub-water pools 11 in the first direction. In the first direction, the five water diversion tanks 11 are respectively a primary anoxic tank 11a, an anaerobic tank 11b, a primary aerobic tank 11c, a secondary anoxic tank 11d and a secondary aerobic tank 11e, and the four partitions 12 are respectively a first partition 12a, a second partition 12b, a third partition 12c and a fourth partition 12d.

[0031] Reference Figure 1 and Figure 2 , a claw-type water distributor 2 is correspondingly provided in each of the primary anoxic pool 11a and the secondary anoxic pool 11d, and the claw-type water distributor 2 has a feed end 21 and a claw-type water outlet end 22. The feed end 21 of the claw-type water distributor 2 is fixedly connected to the top plate 16, and an enhanced pulse unit 23 with an enhanced pulse generator is arranged at the feed end 21, so that the enhanced pulse unit 23 performs a pulse impact on the water entering the feed end 21, and a water inlet pipe 24 is correspondingly connected to the feed end 21 of each claw-type water distributor 2 to deliver water to each claw-type water distributor 2. In addition, each water inlet pipe 24 is correspondingly installed with a first valve 241 to control the on-off of the water flow in the water inlet pipe; The claw-type water outlet 22 of the claw-type water distributor 2 is claw-shaped and located at the bottom of the pool. After the water flows into the claw-type water distributor 2 from the feed end 21, it is discharged from the claw-type water outlet 22 and flows above the primary anoxic pool 11a and the secondary anoxic pool 11d. Under the impact of the enhanced pulse unit 23, the water discharged from the claw-type water outlet 22 will drive the water in the primary anoxic pool 11a and the secondary anoxic pool 11d to vibrate, so that the sludge in the primary anoxic pool 11a and the secondary anoxic pool 11d is suspended. The primary anoxic pool 11a and the secondary anoxic pool 11d are respectively provided with filler microbial carriers 13, and the suspended sludge can fully interact with the microorganisms located on the carriers. Specifically, a carrier frame 14 located in the primary anoxic pool 11a and the secondary anoxic pool 11d is fixedly connected to the top plate 16, and the filler microbial carriers 13 are distributed on the carrier frame 14. A drainage hole 121 is provided at the top of the first partition 12a. In the primary anoxic tank 11a, the drainage hole 121 is located above the claw-type water outlet 22 and the filler microorganism carrier 13. The water discharged from the claw-type water distributor 2 flows upward, passes near the filler microorganism carrier 13, and continues to flow upward to the drainage hole 121, and enters the anaerobic tank 11b through the drainage hole 121 for the next reaction.

[0032] Reference Figure 1 and Figure 2 A water distribution pipe 15 is provided in the anaerobic tank 11b. The water inlet end of the water distribution pipe 15 is fixedly connected to the first partition plate 12a and communicated with the drainage hole 121. The water outlet end of the water distribution pipe 15 is located at the bottom of the anaerobic tank 11b to discharge the water in the primary anoxic tank 11a to the bottom of the anaerobic tank 11b.

[0033] Reference Figure 3 and Figure 4 In order to prevent the sludge in the anaerobic tank 11b from settling, in some embodiments of the present application, a stirring assembly 4 is further included. In the depth direction of the anaerobic tank 11b, the stirring assembly 4 is located below the water outlet end of the water distribution pipe 15. The stirring assembly 4 includes a stirring ring 41 with a central axis and a plurality of stirring blocks 42 protruding from the outer peripheral wall of the stirring ring 41. The central axis of the stirring ring 41 is parallel to the depth direction of the anaerobic tank 11b, and the stirring ring 41 rotates around its own central axis and is connected to the bottom wall of the anaerobic tank 11b; as the stirring ring 41 rotates, the stirring block 42 rotates synchronously with the stirring ring 41 to stir the liquid in the anaerobic tank 11b to prevent the sludge in the anaerobic tank 11b from being completely settled to the bottom of the anaerobic tank 11b.

[0034] Reference Figure 3 and Figure 4 In order to further stir the sludge, in some embodiments of the present application, the stirring assembly 4 further includes a stirring rod 43 and a stirring blade 44. The stirring rod 43 is arranged parallel to the central axis of the stirring ring 41, and the stirring rod 43 is located on the side of the central axis of the stirring ring 41, that is, the stirring rod 43 is eccentrically arranged on the stirring ring 41. As the stirring ring 41 rotates, the stirring rod 43 also rotates along the circumference of the stirring ring 41; The blades 44 are fixedly connected to the stirring rod 43, and each stirring rod 43 may be correspondingly fixedly connected with a plurality of blades 44; when the stirring rod 43 rotates along the circumference, the blades 44 rotate along with the stirring rod 43, stirring the water in the anaerobic tank 11b to reduce sludge precipitation.

[0035] In order to further prevent sludge sedimentation, in some embodiments of the present application, a plurality of stirring components 4 are provided, and the plurality of stirring components 4 are distributed at intervals on the bottom of the pool.

[0036] Reference Figure 4 and Figure 5 In order to drive the stirring rings 41 in the plurality of stirring assemblies 4 to rotate, in some embodiments of the present application, a first driving assembly 5 is further included, and the first driving assembly 5 includes a motor 51 and a plurality of first gears 52; The motor 51 is a servo motor, and the motor 51 is located outside the anaerobic tank 11b. The housing of the motor 51 is fixedly connected to the bottom of the anaerobic tank 11b. The output shaft of the motor 51 passes through the bottom wall of the anaerobic tank 11b and extends into the anaerobic tank 11b. The first gear 52 is rotatably connected to the bottom wall of the anaerobic tank 11b through the rotating shaft 521, and the first gear 52, the rotating shaft 521 and the stirring ring 41 are coaxially arranged; a plurality of first gears 52 are sequentially distributed along the arrangement wire; in the present disclosure, the direction of the arrangement wire is V-shaped, and along the direction of the arrangement wire, two adjacent first gears 52 are meshed; the output shaft of the motor 51 passes through the bottom wall of the anaerobic tank 11b and is fixedly connected to one of the first gears 52, so that the plurality of first gears 52 can be driven to rotate; Each stirring assembly 4 is connected to a corresponding first gear 52. Specifically, the first gear 52 is located at one end of the stirring ring 41 close to the bottom of the anaerobic tank 11b. Each stirring ring 41 is coaxially fixedly connected to a first gear 52 so that the stirring ring 41 can rotate synchronously with the first gear 52. Multiple stirring rings 41 rotate under the drive of the first driving assembly 5, so that the stirring assembly 4 rotates as a whole.

[0037] Reference Figure 4 and Figure 5 In order to reduce the sludge from entering between two adjacent first gears 52, in some embodiments of the present application, an isolation plate 7 is further included, and the isolation plate 7 is fixedly connected to the inside of the anaerobic tank 11b, and the outer peripheral side wall of the isolation plate 7 is adaptively fitted and fixedly connected to the inner peripheral side wall of the anaerobic tank 11b; In the depth direction of the anaerobic tank 11b, the isolation plate 7 is sandwiched between the stirring ring 41 and the first gear 52, and one end of the isolation plate 7 is in contact with the stirring ring 41, and the other end is in contact with the first gear 52; In order to enable the stirring ring 41 to rotate with the first gear 52, a plurality of avoidance holes 71 are opened on the isolation plate 7, and a connecting ring 411 is fixedly connected between the stirring ring 41 and the first gear 52, and the connecting ring 411 is located in the avoidance hole 71; specifically, the isolation plate 7 is provided with a corresponding avoidance hole 71 at each first gear 52, and a corresponding connecting ring 411 is provided in each avoidance hole 71.

[0038] Reference Figure 4 and Figure 5 In order to further reduce the sludge precipitation in the anaerobic tank 11b, in some embodiments of the present application, a second drive assembly 8 is further included. On each of the first gears 52 not connected to the motor 51, a second drive assembly 8 is correspondingly provided, and on the first gear 52 connected to the motor 51, no second drive assembly 8 is provided; The second driving assembly 8 includes a second gear 81, a connecting shaft 82 and a third gear 83; the second gear 81 is coaxially arranged with the first gear 52, the connecting shaft 82 is parallel to the depth direction of the anaerobic tank 11b, one end of the connecting shaft 82 is fixedly connected to the second gear 81, and the other end is fixedly connected to the bottom wall of the anaerobic tank 11b after passing through the first gear 52 and the rotating shaft 521 in sequence. Specifically, the rotating shaft 521 and the first gear 52 are provided with a rotating hole 522 for the rotating shaft 521 to pass through, and the gear and the rotating shaft 521 can rotate relative to the connecting shaft 82; The central axis of the third gear 83 is parallel to the central axis of the second gear 81 . The third gear 83 is sleeved and fixedly connected to the outer periphery of the stirring rod 43 , and the third gear 83 is meshed with the second gear 81 . The stirring rod 43 rotates around the central axis of the third gear 83 and is connected to the stirring ring 41 .

[0039] Reference Figure 4 and Figure 5 During operation, the motor 51 drives the plurality of first gears 52 to rotate, the first gears 52 drive the stirring ring 41 to rotate, and the stirring rod 43 and the blades 44 mounted on the stirring ring 41 rotate synchronously. As the stirring rod 43 rotates, driven by the second gear 81 and the third gear 83, the stirring rod 43 will rotate on its own, thereby further increasing the stirring force and reducing the sludge precipitation in the anaerobic tank 11b.

[0040] Reference Figure 6 After the stirring component 4 stirs the water in the anaerobic tank 11b, the water needs to be discharged into the primary aerobic tank 11c. Specifically, a first outlet weir 122 is formed on the top of the second partition 12b. The water in the anaerobic tank 11b enters the primary aerobic tank 11c through the first outlet weir 122 for the next reaction.

[0041] Reference Figure 6 After the water enters the primary aerobic pool 11c and fully reacts, it needs to be discharged into the secondary anoxic pool 11d. Specifically, a water outlet 123 is formed at the bottom of the third partition 12c. The water in the primary aerobic pool 11c enters the bottom of the secondary anoxic pool 11d through the water outlet 123 at the bottom. The water entering the bottom of the secondary anoxic pool 11d and the water discharged from the claw-type water outlet 22 in the secondary anoxic pool 11d all flow upward and continue to flow upward after passing near the filler microorganism carrier 13 in the secondary anoxic pool 11d. A second water outlet weir 124 is formed on the top of the fourth partition plate 12d, and the water in the secondary anoxic tank 11d is discharged into the secondary aerobic tank 11e through the second water outlet weir 124 for further reaction.

[0042] Reference Figure 6In order to increase the oxygen content in the primary aerobic pool 11c and the secondary aerobic pool 11e, in some embodiments of the present application, an aeration system 3 is also included. An aeration system 3 is correspondingly provided in the primary aerobic pool 11c and the secondary aerobic pool 11e, and the aeration system 3 is located at the bottom of the pool to increase the oxygen content in the entire pool.

[0043] In some embodiments of the present application, a return system is also included, the return system includes a water collection tank 92 and four return pipes 91, the four return pipes 91 are respectively a first return pipe 91a, a second return pipe 91b, a third return pipe 91c and a fourth return pipe 91d; The water inlet end of the first water return pipe 91a is connected to the bottom of the primary anoxic pool 11a, and the water outlet end is connected to the water collection pool 92; The water inlet of the second water return pipe 91b is connected to the bottom of the secondary anoxic pool 11d, and the water outlet is connected to the water collection pool 92; The water inlet end of the third water return pipe 91c is connected to the water collection tank 92, and the water outlet end is connected to the feed end 21 of the first claw-type water distributor 2; The water inlet end of the fourth water return pipe 91d is connected to the water collection tank 92, and the water outlet end is connected to the feed end 21 of the second claw-type water distributor 2; The implementation principle of the low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and phosphorus removal reactor in the embodiment of the present application is: the water flows through the primary anoxic tank 11a, the anaerobic tank 11b, the primary aerobic tank 11c, the secondary anoxic tank 11d and the secondary aerobic tank 11e in sequence, and different reactions occur in different water distribution tanks 11. Finally, the water discharged from the primary aerobic tank 11c and the secondary aerobic tank 11e is mixed and then passed into the primary anoxic tank 11a and the secondary anoxic tank 11d again.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor, characterized in that: It comprises a main water pool (1) and a water return system (9), wherein four partitions (12) are arranged in the main water pool (1), and the four partitions (12) are spaced apart in a first direction so as to divide the main water pool (1) into five sub-water pools (11) in the first direction; In the first direction, the five water diversion tanks (11) are respectively a primary anoxic tank (11a), an anaerobic tank (11b), a primary aerobic tank (11c), a secondary anoxic tank (11d) and a secondary aerobic tank (11e), and the four partitions (12) are respectively a first partition (12a), a second partition (12b), a third partition (12c) and a fourth partition (12d); The water return system (9) comprises a water collection tank (92) and four water return pipes (91); The four water return pipes (91) are respectively a first water return pipe (91a), a second water return pipe 91b, a third water return pipe (91c) and a fourth water return pipe (91d); The water inlet end of the first water return pipe (91a) is connected to the primary aerobic pool (11c), and the water outlet end is connected to the water collection pool (92); The water inlet end of the second water return pipe 91b (91) is connected to the secondary aerobic tank (11e), and the water outlet end is connected to the water collection tank (92); The water inlet end of the third water return pipe (91c) is connected to the water collection tank (92), and the water outlet end is connected to the primary anoxic tank (11a); The water inlet end of the fourth water return pipe (91d) is connected to the water collection tank (92), and the water outlet end is connected to the secondary anoxic tank (11d).

2. The low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 1 is characterized in that: The first-level anoxic pool (11a) and the second-level anoxic pool (11d) are each correspondingly provided with a claw-type water distributor (2), and the claw-type water distributor (2) comprises a feed end (21) and a claw-type water outlet end (22); The feed end (21) of the claw-type water distributor (2) is fixedly connected to the main water pool (1), and the feed end (21) of the claw-type water distributor (2) is provided with an enhanced pulse unit (23) for oscillating the liquid flowing through the claw-type water distributor (2); The claw-type water outlet end (22) of the claw-type water distributor (2) is located at the bottom of the water distribution pool (11).

3. A low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 2, characterized in that: The first-level anoxic pool (11a) and the second-level anoxic pool (11d) are each correspondingly fixedly connected with a carrier frame (14), and a filler microorganism carrier (13) is provided on the carrier frame (14).

4. A low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 3, characterized in that: A drainage hole (121) is provided on the top of the first partition plate (12a), and a water distribution pipe (15) is provided in the anaerobic tank (11b); The water inlet end of the water distribution pipe (15) is fixedly connected to the first partition plate (12a) and communicates with the drainage hole (121); The water outlet end of the water distribution pipe (15) is located at the bottom of the anaerobic tank (11b); In the depth direction of the water diversion tank (11), the filler microorganism carrier (13) is located between the claw-type water outlet end (22) and the drainage hole (121).

5. A low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 4, characterized in that: A first water outlet weir (122) is formed on the top of the second partition plate (12b), and the first water outlet weir (122) connects the anaerobic tank (11b) and the primary aerobic tank (11c).

6. A low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 5, characterized in that: The third partition plate (12c) is formed with a water outlet (123) at the bottom of the pool, and the water outlet (123) is connected to the primary aerobic pool (11c) and the secondary anoxic pool (11d).

7. The low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 6, characterized in that: A second water outlet weir (124) is formed on the top of the fourth partition plate (12d), and the second water outlet weir (124) is connected to the secondary anoxic pool (11d) and the secondary aerobic pool (11e).

8. The low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 7, characterized in that: It also includes a plurality of aeration systems (3), wherein the first-level aerobic tank (11c) and the second-level aerobic tank (11e) are each provided with the aeration system (3); The aeration systems (3) in the primary aerobic tank (11c) and the secondary aerobic tank (11e) are both located at the bottom of the tanks.

9. A low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to any one of claims 1 to 8, characterized in that: The invention also comprises a stirring assembly (4), wherein the stirring assembly (4) comprises: A stirring ring (41), the stirring ring (41) is connected to the bottom wall of the anaerobic tank (11b) by rotating around its own central axis, and the central axis of the stirring ring (41) is parallel to the depth direction of the anaerobic tank (11b); and A stirring block (42), wherein the stirring block (42) is fixedly connected to the outer peripheral wall of the stirring ring (41).

10. The low carbon-nitrogen ratio multi-point reflux pulse water distribution inverted denitrification and dephosphorization reactor according to claim 9, characterized in that: The stirring assembly (4) further comprises: a stirring rod (43), the stirring rod (43) being connected to the stirring ring (41) so as to rotate about a first axis, the first axis being parallel to the depth direction of the anaerobic tank (11b), and the first axis being located to the side of the central axis of the stirring ring (41); and A blade (44), wherein the blade (44) is fixedly connected to the stirring rod (43).

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