Low-aeration high-nitrogen-content sewage treatment device

Abstract

The invention discloses a low-aeration high-nitrogen-content sewage treatment device, and relates to the technical field of sewage treatment. Comprising a base, an operation cylinder and a sedimentation tank are arranged on the base, and a bottom cylinder is cooperatively arranged at the bottom end of the operation cylinder; partition plates are arranged in the operation barrel and divide the interior of the operation barrel into five operation pools, namely an anaerobic pool, a first anoxic pool, a first aerobic pool, a second anoxic pool and a second aerobic pool. The second aerobic tank is communicated with the sedimentation tank; push plates are respectively arranged in the five operation pools in a matching manner and are used for pushing out impurities; a stirring mechanism I is arranged in the anaerobic tank, and stirring mechanisms II are arranged in the other four operation tanks; a conveying mechanism is arranged at the bottom end of the bottom cylinder and located between every two operation pools in a communicating mode and used for conveying sewage; according to the invention, compact arrangement of each operation pool can be realized, and multi-stage biological treatment of sewage is realized; real-time dredging and maintenance are facilitated, and the interior of the operation pool is convenient to clean and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a low-aeration and high-nitrogen sewage treatment device. Background Art

[0002] Low-aeration, high-nitrogen sewage treatment equipment generally refers to the use of low-aeration technology to achieve the purpose of removing nitrogen compounds when treating water bodies polluted by high concentrations of nitrogen compounds, such as ammonia nitrogen, nitrite nitrogen, etc. This treatment method usually combines biological denitrification and physical and chemical methods to treat sewage in a highly efficient and low-energy manner. In the existing sewage treatment equipment, the anaerobic tank, anoxic tank, aerobic tank, sedimentation tank and other working chambers are all separated in the structural layout. When transmitting sewage, the pipeline is relatively long, and since the sewage contains solid impurities, it is easy to cause blockage after a long period of operation. In addition, periodic maintenance operations are also required for the interior of the working pool. Based on this, the present invention proposes a sewage treatment device to achieve a compact arrangement of each working pool and realize multi-stage biological treatment of sewage. It is conducive to real-time dredging and maintenance, and is convenient for cleaning and maintenance of the interior of the working pool. Summary of the Invention

[0003] In response to the above technical problems, the present invention can achieve compact arrangement of each operation pool and realize multi-stage biological treatment of sewage; it is conducive to real-time dredging and maintenance, and convenient for cleaning and maintenance of the interior of the operation pool.

[0004] The solution used in the present invention is: a low-aeration and high-nitrogen sewage treatment device, including a base, an operating cylinder and a sedimentation tank are arranged on the base, and a bottom cylinder is arranged at the bottom end of the operating cylinder; a partition is arranged inside the operating cylinder, and the partition divides the inside of the operating cylinder into five operating pools, namely: an anaerobic pool, a first anoxic pool, a first aerobic pool, a second anoxic pool, and a second aerobic pool; the second aerobic pool is connected to the sedimentation tank; a push plate is respectively arranged in the five operating pools for pushing out impurities; a stirring mechanism 1 is arranged in the anaerobic pool, and a stirring mechanism 2 is arranged in the other four operating pools; a transmission mechanism is arranged at the bottom end of the bottom cylinder and is connected between each operating pool for transmitting sewage; the transmission mechanism includes two transmission valve pumps, and a docking pipe is arranged between the transmission valve pumps, and a control mechanism is arranged below the transmission mechanism for controlling the movement and deflection of the docking pipe, and a pushing cylinder is arranged on the outside of the transmission mechanism for clearing the docking pipe.

[0005] Furthermore, the sedimentation tank includes a sedimentation box arranged on the base, and an inclined tube filler is arranged inside the sedimentation tank; the sedimentation box is connected to the second aerobic tank through a pipeline, and an aeration pipe is provided on the bottom cylinder for aeration, and the aeration pipe is located in the first aerobic tank and the second aerobic tank. An aeration transmission part is provided on the base, and the aeration transmission part is connected to the aeration pipe; a control cylinder is provided on the base for controlling the movement of the bottom cylinder.

[0006] Furthermore, a screw rod and a motor are provided on the top of the base, and the motor is used to drive the screw rod. A slide is slidably installed on the base, and the slide and the screw rod form a spiral pair, and a connecting shaft is provided on the slide, and the connecting shaft is connected to the push plate inside each operation pool; a turntable is rotatably installed on the push plate located in the anaerobic pool, and a slide groove is provided on the push plate located inside the other four operation pools, and a pushing cylinder is provided on the push plate, and a pushing part is provided on the telescopic rod of the pushing cylinder, and the pushing part slides and fits inside the slide groove; a driving mechanism is provided on the top of the working cylinder for driving the stirring mechanism 1 and the stirring mechanism 2.

[0007] Furthermore, the driving mechanism includes a gear ring rotatably mounted on the top of the working cylinder, and a second motor arranged on the top of the working cylinder, a second gear is arranged on the output shaft of the second motor, and the second gear is engaged with the gear ring; a gear cylinder is arrayed and rotatably arranged on the top of the working cylinder, an electromagnetic sliding clamping shaft is provided on the gear cylinder, the gear cylinder is engaged with the gear ring, and the electromagnetic sliding clamping shaft clamps and fixes the top of the stirring mechanism one and the stirring mechanism two for drive control.

[0008] Furthermore, the stirring mechanism 1 includes a stirring shaft rotatably mounted on the working cylinder, and the stirring shaft slides with the turntable; the stirring mechanism 2 includes a stirring aeration shaft rotatably mounted on the working cylinder, and an electromagnetic sliding clamp clamps the fixed stirring shaft and the top end of the stirring aeration shaft for drive control.

[0009] Furthermore, the second stirring mechanism also includes a pillar arranged on the stirring aeration shaft, with air holes opened on the pillar, and an auxiliary aeration transmission part is arranged at the top of the working cylinder, which is respectively connected to the stirring aeration shafts in the four working pools for aeration transmission; a connecting gear is arranged on one end of the pillar facing the inner side of the stirring aeration shaft, a driving motor is arranged inside the stirring aeration shaft, a driving shaft is arranged on the output shaft of the driving motor, and an engaging disk is arranged on the driving shaft, which engages with the connecting gear.

[0010] Furthermore, the transmission mechanism includes a docking control electric cylinder arranged on the docking pipe, a docking end plate is arranged on the telescopic rod of the docking control electric cylinder, the docking end plate is connected to the docking pipe, and the docking control electric cylinder controls the docking end plate to seal with the transmission hole position of the transmission valve pump; a rotating rack is arranged on the docking pipe, and the rotating rack is driven by the control mechanism.

[0011] Furthermore, the control mechanism includes a bracket arranged at the bottom end of the base tube, a control gear ring is rotatably mounted on the bracket, and a control gear is rotatably mounted on the bracket, and the control gear is engaged with the control gear ring; the rotating frame and the control gear are slidably fitted, a lifting electric cylinder is arranged at the bottom end of the base tube, a mounting ring is arranged on the telescopic rod of the lifting electric cylinder, the bottom end of the rotating frame is rotatably mounted on the mounting ring, a control motor is arranged on the mounting ring, and the control motor is used to drive the rotating frame.

[0012] Furthermore, a cleaning portion is provided on the telescopic rod of the pushing oil cylinder, and the end of the docking pipe is deflected and moved toward the pushing oil cylinder, and the cleaning portion dredges the docking pipe.

[0013] Compared with the prior art, the present invention has the following advantages: (1) in the anaerobic tank, low-intensity stirring can be performed to maintain the uniformity of the water flow in the tank, and in the anoxic tank, light stirring is used to avoid stratification of the water layer or to maintain a uniform water flow; (2) in the aerobic tank, gas is transmitted through the aeration transmission part, the aeration pipe performs high-intensity aeration from the bottom, and the support assists aeration and stirring, thereby improving the aeration efficiency; (3) if the docking pipe is blocked, the docking end plate and the transmission valve pump can be released from the docking by the docking control electric cylinder, and then the mounting ring can be controlled to descend by the lifting electric cylinder, that is, the docking pipe is driven to descend, and each docking pipe is deflected and moved, so that It moves toward the pushing cylinder, which controls the movement of the cleaning part to push the impurities inside the docking pipe to achieve dredging; (4) the turntable and the stirring shaft slide together to remove the impurities attached to the stirring shaft, and the push plate removes the impurities attached to the inside of the anaerobic tank; the pillar can pass through each slide groove, and at the position of the slide groove, the push part can be controlled to move by the pushing cylinder, and the push part performs a scraping operation on the circumferential area of the pillar, and the driving shaft is driven by the driving motor to rotate the pillar, that is, to achieve full-area scraping, and the impurities are pushed from the working pool to the bottom cylinder. The bottom cylinder is controlled to move by the control cylinder and can be separated from the working cylinder to facilitate subsequent operations by the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the internal structure of the working cylinder of the present invention.

[0016] Figure 3 It is a schematic diagram of the top structure of the working cylinder of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the stirring mechanism of the present invention.

[0018] Figure 5 This is a schematic diagram of the structure of the stirring aeration shaft of the present invention.

[0019] Figure 6 It is a schematic diagram of the push plate structure of the present invention.

[0020] Figure 7 It is a schematic diagram of the bottom tube structure of the present invention.

[0021] Figure 8 Schematic diagram of the control mechanism structure of the present invention.

[0022] Figure 9It is a schematic diagram of the transmission mechanism structure of the present invention.

[0023] Figure 10 This is a schematic diagram of the local installation structure of the bottom tube of the present invention.

[0024] Figure 1: 1-base; 101-aeration transmission part; 2-operating cylinder; 3-sedimentation box; 4-inclined tube filler; 5-bottom cylinder; 6-screw rod 1; 7-slide plate; 8-motor 1; 9-connecting shaft; 10-partition plate; 11-push plate; 1101-chute; 12-auxiliary aeration transmission part; 13-motor 2; 14-gear 2; 15-gear cylinder; 16-gear ring; 17-electromagnetic sliding clamping shaft; 18-turntable; 19-agitation shaft; 20-agitation aeration shaft; 21-support Column; 22-pushing cylinder; 23-pushing part; 24-engaging disk; 25-connecting gear; 26-driving shaft; 27-driving motor; 28-control cylinder; 29-pushing cylinder; 30-lifting electric cylinder; 31-mounting ring; 32-control motor; 33-bracket; 34-control gear ring; 35-control gear; 36-transmission valve pump; 37-docking pipeline; 38-docking control electric cylinder; 39-docking end plate; 40-rotating frame; 41-aeration pipe; 42-cleaning part. DETAILED DESCRIPTION

[0025] Example: Figures 1 to 10 As shown, a low-aeration and high-nitrogen sewage treatment device includes a base 1, on which an operating barrel 2 and a sedimentation tank are provided, and a bottom barrel 5 is provided at the bottom end of the operating barrel 2; a partition 10 is provided inside the operating barrel 2, and the partition 10 divides the inside of the operating barrel 2 into five operating pools, namely: an anaerobic pool, a first anoxic pool, a first aerobic pool, a second anoxic pool, and a second aerobic pool; the second aerobic pool is connected to the sedimentation tank; a push plate 11 is provided in each of the five operating pools for pushing out impurities; a stirring mechanism 1 is provided in the anaerobic pool, and a stirring mechanism 2 is provided in the other four operating pools; a transmission mechanism is provided at the bottom end of the bottom barrel 5 and between each operating pool for transmitting sewage; the transmission mechanism includes two transmission valve pumps 36, and a docking pipe 37 is provided between the transmission valve pumps 36. A control mechanism is provided below the transmission mechanism for controlling the movement and deflection of the docking pipe 37, and a pushing cylinder 29 is provided on the outside of the transmission mechanism for clearing the docking pipe 37.

[0026] The sedimentation tank includes a sedimentation box 3 arranged on a base 1, and an inclined tube filler 4 is arranged inside the sedimentation box 3; the sedimentation box 3 is connected to the second aerobic tank by a pipeline, and an aeration pipe 41 is provided on the bottom barrel 5 for aeration. The aeration pipe 41 is located in the first aerobic tank and the second aerobic tank. An aeration transmission part 101 is provided on the base 1, and the aeration transmission part 101 is connected to the aeration pipe 41; a control cylinder 28 is provided on the base 1 for controlling the movement of the bottom barrel 5.

[0027] A screw rod 6 and a motor 8 are provided on the top of the base 1. The motor 8 is used to drive the screw rod 6. A slide plate 7 is slidably installed on the base 1. The slide plate 7 and the screw rod 6 form a spiral pair, and a connecting shaft 9 is provided on the slide plate 7. The connecting shaft 9 is connected to the push plate 11 inside each operation pool; a turntable 18 is rotatably installed on the push plate 11 located in the anaerobic pool, and a slide groove 1101 is opened on the push plate 11 located in the other four operation pools, and a push cylinder 22 is provided on the push cylinder 22. A push part 23 is provided on the telescopic rod, and the push part 23 slides in the slide groove 1101. Inside; a driving mechanism is provided on the top of the working cylinder 2 for driving the stirring mechanism one and the stirring mechanism two; the driving mechanism includes a gear ring 16 rotatably mounted on the top of the working cylinder 2, and a motor two 13 provided on the top of the working cylinder 2, and a gear two 14 is provided on the output shaft of the motor two 13, and the gear two 14 is engaged with the gear ring 16; a gear cylinder 15 is arranged in an array and rotatably on the top of the working cylinder 2, and an electromagnetic sliding clamping shaft 17 is provided on the gear cylinder 15, which is engaged with the gear ring 16, and the electromagnetic sliding clamping shaft 17 clamps and fixes the top of the stirring mechanism one and the stirring mechanism two for drive control.

[0028] The first stirring mechanism includes a stirring shaft 19 rotatably mounted on the working barrel 2, and the stirring shaft 19 slides with the turntable 18. The second stirring mechanism includes a stirring aeration shaft 20 rotatably mounted on the working barrel 2, and an electromagnetic sliding clamping shaft 17 clamps and fixes the stirring shaft 19 and the top of the stirring aeration shaft 20 for drive control. The second stirring mechanism also includes a pillar 21 arranged on the stirring aeration shaft 20, and the pillar 21 is provided with an air hole. An auxiliary aeration transmission part 12 is provided at the top of the working barrel 2, and the auxiliary aeration transmission part 12 is respectively connected to the stirring aeration shaft 20 in the four working tanks for aeration transmission. A connecting gear 25 is provided on the end of the pillar 21 facing the inner side of the stirring aeration shaft 20. A drive motor 27 is provided inside the stirring aeration shaft 20. A drive shaft 26 is provided on the output shaft of the drive motor 27. An engaging disk 24 is provided on the drive shaft 26, and the engaging disk 24 engages with the connecting gear 25.

[0029] The transmission mechanism includes a docking control electric cylinder 38 provided on the docking pipe 37, a docking end plate 39 provided on the telescopic rod of the docking control electric cylinder 38, the docking end plate 39 is connected to the docking pipe 37, and the docking control electric cylinder 38 controls the docking end plate 39 to seal with the transmission hole of the transmission valve pump 36; a rotating frame 40 is provided on the docking pipe 37, and the rotating frame 40 is driven by the control mechanism; the control mechanism includes a bracket 33 provided at the bottom end of the bottom cylinder 5, a control gear ring 34 is rotatably mounted on the bracket 33, and a control gear 3 is rotatably mounted on the bracket 33 5, the control gear 35 is meshed with the control ring gear 34; the rotating frame 40 is slidably matched with the control gear 35, and a lifting electric cylinder 30 is provided at the bottom end of the bottom cylinder 5. A mounting ring 31 is provided on the telescopic rod of the lifting electric cylinder 30. The bottom end of the rotating frame 40 is rotatably mounted on the mounting ring 31, and a control motor 32 is provided on the mounting ring 31. The control motor 32 is used to drive the rotating frame 40; a cleaning part 42 is provided on the telescopic rod of the pushing cylinder 29, and the end of the docking pipe 37 deflects and moves toward the pushing cylinder 29, and the cleaning part 42 dredges the docking pipe 37.

[0030] The principle of the present invention is as follows: sewage is first passed into an anaerobic tank. In an anaerobic environment, organic matter in the water is decomposed by microorganisms in the absence of oxygen. For nitrogen-containing sewage, the main function of the anaerobic tank is to remove nitrate nitrogen from the sewage. Anaerobic microorganisms (such as denitrifying bacteria) can use nitrate or nitrite as electron acceptors and reduce them to gaseous nitrogen under anaerobic conditions; this helps reduce the nitrate nitrogen content in the water and lays the foundation for the subsequent denitrification process. The anaerobic tank can also promote the decomposition of organic matter in the water.

[0031] The sewage is transferred from the anaerobic tank to the first anoxic tank by transmission, that is, the sewage is transferred through the transmission valve pump 36 and the docking pipe 37, and denitrification is carried out in the first anoxic tank. That is, in an anoxic environment, denitrifying bacteria use the external carbon source as energy to convert nitrate nitrogen in the water into gaseous nitrogen; in the anoxic tank, the addition of the carbon source enhances the denitrification process, thereby effectively removing nitrate nitrogen in the water.

[0032] The transmission mechanism transfers the sewage from the first anoxic tank to the first aerobic tank. The aerobic tank provides oxygen to enable nitrification to occur. In an aerobic environment, ammonia nitrogen in the water is converted into nitrite nitrogen and nitrate nitrogen by nitrifying bacteria. This process requires oxygen, so aeration is carried out in the aerobic tank.

[0033] The sewage is then sequentially transferred to the second anoxic tank and the second aerobic tank through the transmission mechanism to achieve multi-stage biological treatment of the sewage. Through the nitrification and denitrification processes, nitrogen pollutants in the water are effectively removed to achieve the purpose of nitrogen reduction. Finally, the sewage is transferred from the second aerobic tank to the sedimentation tank. In the sedimentation tank, the inclined tube filler 4 can promote the sedimentation of solid particles in the water and improve the sedimentation effect. The clean water after sedimentation treatment is discharged from the top of the sedimentation tank.

[0034] It should be noted that in each operation pool, various stirring intensities can be controlled for sewage, that is, by operating the motor 2 13, the gear ring 16 rotates, and then the gear cylinder 15 rotates, and the electromagnetic sliding clamp 17 clamps and fixes the top of the corresponding stirring mechanism 1 or stirring mechanism 2 to achieve drive control; in the anaerobic tank, low-intensity stirring can be performed to maintain the uniformity of the water flow in the tank, that is, the stirring shaft 19 is driven to rotate to perform the stirring operation; in the other four operation pools, the stirring treatment is performed by driving the stirring aeration shaft 20 to rotate, and a light stirring method is adopted in the anoxic tank. , to avoid water layer stratification or maintain uniform water flow, strong stirring treatment is performed in the aerobic tank to improve the aeration efficiency; further, when the aeration shaft 20 is stirred, the auxiliary aeration transmission part 12 transmits gas, and the gas is transmitted to the inside of the aeration shaft 20 and released through the air holes on the support 21, thereby playing an auxiliary aeration role, that is, in the anoxic tank, low-intensity aeration is performed through the support 21, and in the aerobic tank, gas is transmitted through the aeration transmission part 101, and the aeration pipe 41 performs high-intensity aeration from the bottom, and the support 21 assists aeration and performs stirring, thereby improving the aeration efficiency.

[0035] During subsequent maintenance operations, if the docking pipe 37 is blocked, the docking control electric cylinder 38 can be used to control the docking end plate 39 and the transmission valve pump 36 to release the docking cooperation, and then the lifting electric cylinder 30 can be used to control the mounting ring 31 to descend, thereby driving the docking pipe 37 to descend, and then the control motor 32 is used to drive the rotating frame 40 to rotate, and the control gear 35 also rotates. Under the transmission action of the control gear ring 34, each docking pipe 37 is deflected and moved toward the pushing cylinder 29, and the pushing cylinder 29 controls the movement of the cleaning part 42 to push the impurities inside the docking pipe 37 to achieve dredging.

[0036] Furthermore, by the operation of motor 18, screw rod 16 rotates, so that the push plate 11 in each operation pool moves. In the anaerobic pool, the turntable 18 and the push plate 11 move, and the turntable 18 and the stirring shaft 19 slide together, so that the impurities attached to the stirring shaft 19 can be removed, and the push plate 11 removes the impurities attached to the inner side of the anaerobic pool; in the other operation pools, the push plate 11 moves, and the pillar 21 can pass through each slide groove 1101. At the position of the slide groove 1101, the push part 23 can be controlled to move by pushing the cylinder 22. The push part 23 performs a scraping operation on the circumferential area of the pillar 21, and the drive shaft 26 is driven by the drive motor 27 to rotate the pillar 21, that is, full-area scraping is achieved, and the magazine is pushed from the operation pool into the bottom drum 5. The bottom drum 5 is controlled to move by controlling the oil cylinder 28 and can be separated from the operation drum 2, which is convenient for the operator's subsequent operation.

Claims

1. A low-aeration, high-nitrogen sewage treatment device, comprising a base (1), an operating cylinder (2) provided on the base (1), and a sedimentation tank, wherein a bottom cylinder (5) is provided at the bottom end of the operating cylinder (2); characterized in that: A partition (10) is provided inside the working cylinder (2), and the partition (10) divides the inside of the working cylinder (2) into five working pools, namely: an anaerobic pool, a first anoxic pool, a first aerobic pool, a second anoxic pool, and a second aerobic pool; the second aerobic pool is connected to the sedimentation pool; a push plate (11) is provided in each of the five working pools for pushing out impurities; a stirring mechanism 1 is provided in the anaerobic pool, and a stirring mechanism 2 is provided in the other four working pools; a transmission mechanism is provided at the bottom end of the bottom cylinder (5) and is connected between each working pool for transmitting sewage; the transmission mechanism includes two transmission valve pumps (36), a docking pipe (37) is provided between the transmission valve pumps (36), a control mechanism is provided below the transmission mechanism for controlling the movement and deflection of the docking pipe (37), and a pushing oil cylinder (29) is provided outside the transmission mechanism for dredging the docking pipe (37).

2. The low-aeration, high-nitrogen sewage treatment device according to claim 1, characterized in that: The sedimentation tank comprises a sedimentation tank (3) arranged on a base (1), wherein an inclined tube filler (4) is arranged inside the sedimentation tank (3); the sedimentation tank (3) is connected to the second aerobic tank via a pipeline; an aeration pipe (41) is arranged on the bottom barrel (5) for aeration; the aeration pipe (41) is located in the first aerobic tank and the second aerobic tank; an aeration transmission part (101) is arranged on the base (1), and the aeration transmission part (101) is connected to the aeration pipe (41); and a control oil cylinder (28) is arranged on the base (1) for controlling the movement of the bottom barrel (5).

3. The low-aeration, high-nitrogen sewage treatment device according to claim 1, characterized in that: A screw rod (6) and a motor (8) are provided on the top of the base (1). The motor (8) is used to drive the screw rod (6). A slide plate (7) is slidably installed on the base (1). The slide plate (7) and the screw rod (6) form a spiral pair, and a connecting shaft (9) is provided on the slide plate (7). The connecting shaft (9) is connected to the push plate (11) inside each operation pool; a turntable (18) is rotatably installed on the push plate (11) located in the anaerobic pool, and a slide groove (1101) is opened on the push plate (11) located in the other four operation pools, and a push cylinder (22) is provided on the push cylinder (22). A push part (23) is provided on the telescopic rod, and the push part (23) is slidably fitted inside the slide groove (1101); a driving mechanism is provided on the top of the operation cylinder (2) for driving the stirring mechanism 1 and the stirring mechanism 2.

4. The low-aeration, high-nitrogen sewage treatment device according to claim 3, characterized in that: The driving mechanism comprises a gear ring (16) rotatably mounted on the top of the working cylinder (2), and a second motor (13) arranged on the top of the working cylinder (2), a second gear (14) being arranged on the output shaft of the second motor (13), and the second gear (14) being meshed with the gear ring (16); a gear cylinder (15) being arranged in an array and rotatably mounted on the top of the working cylinder (2), an electromagnetic sliding clamping shaft (17) being arranged on the gear cylinder (15), and the gear cylinder (15) being meshed with the gear ring (16), and the electromagnetic sliding clamping shaft (17) clamping and fixing the top ends of the first stirring mechanism and the second stirring mechanism for driving control.

5. The low-aeration, high-nitrogen sewage treatment device according to claim 4, characterized in that: The first stirring mechanism comprises a stirring shaft (19) rotatably mounted on the working cylinder (2), and the stirring shaft (19) is slidably matched with the turntable (18); the second stirring mechanism comprises a stirring aeration shaft (20) rotatably mounted on the working cylinder (2), and an electromagnetic sliding clamping shaft (17) clamps and fixes the stirring shaft (19) and the top end of the stirring aeration shaft (20) for driving control.

6. The low-aeration, high-nitrogen sewage treatment device according to claim 5, characterized in that: The second stirring mechanism further comprises a support (21) arranged on the stirring aeration shaft (20), an air hole being opened on the support (21), an auxiliary aeration transmission part (12) being arranged at the top of the working cylinder (2), the auxiliary aeration transmission part (12) being respectively connected with the stirring aeration shafts (20) in the four working pools for aeration transmission; a connecting gear (25) is arranged on one end of the support (21) facing the inner side of the stirring aeration shaft (20), a driving motor (27) is arranged inside the stirring aeration shaft (20), a driving shaft (26) is arranged on the output shaft of the driving motor (27), an engaging disc (24) is arranged on the driving shaft (26), and the engaging disc (24) is engaged with the connecting gear (25).

7. The low-aeration, high-nitrogen sewage treatment device according to claim 1, characterized in that: The transmission mechanism comprises a docking control electric cylinder (38) arranged on the docking pipe (37); a docking end plate (39) is arranged on the telescopic rod of the docking control electric cylinder (38); the docking end plate (39) is communicated with the docking pipe (37); the docking control electric cylinder (38) controls the docking end plate (39) to seal and cooperate with the transmission hole of the transmission valve pump (36); a rotating rack (40) is arranged on the docking pipe (37); and the rotating rack (40) is driven by the control mechanism.

8. The low-aeration, high-nitrogen sewage treatment device according to claim 7, characterized in that: The control mechanism comprises a bracket (33) arranged at the bottom end of the bottom cylinder (5), a control gear ring (34) is rotatably mounted on the bracket (33), and a control gear (35) is rotatably mounted on the bracket (33), and the control gear (35) is meshed with the control gear ring (34); a rotating frame (40) is slidably matched with the control gear (35), a lifting electric cylinder (30) is arranged at the bottom end of the bottom cylinder (5), a mounting ring (31) is arranged on the telescopic rod of the lifting electric cylinder (30), the bottom end of the rotating frame (40) is rotatably mounted on the mounting ring (31), and a control motor (32) is arranged on the mounting ring (31), and the control motor (32) is used to drive the rotating frame (40).

9. The low-aeration, high-nitrogen sewage treatment device according to claim 1, characterized in that: The telescopic rod of the pushing oil cylinder (29) is provided with a cleaning portion (42). The end of the docking pipe (37) deflects and moves toward the pushing oil cylinder (29), and the cleaning portion (42) dredges the docking pipe (37).

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