Sewage denitrification device with sampling function

Abstract

The utility model discloses a sewage denitrification device with a sampling function, which comprises a base, an anoxic tank is fixedly mounted on the left side of the base, a sewage input port is fixedly mounted on the left side of the anoxic tank, an aerobic tank is fixedly mounted on the right side of the base, and sealing covers are fixedly mounted on the upper sides of the anoxic tank and the aerobic tank. Sealing covers are arranged in the anoxic tank and the aerobic tank, observation openings are formed in the sealing covers, turning covers are connected to the observation openings through hinges, multi-layer sampling devices are arranged on the anoxic tank and the aerobic tank, each multi-layer sampling device comprises an outer cylinder, an inner cylinder, a sampling cylinder and a stable pedal, and the outer cylinders are connected to the sealing covers in a sliding mode. According to the utility model, water samples with different heights in the anoxic tank and the aerobic tank can be simultaneously sampled, the reaction condition in the tank can be timely mastered, the sampling time is saved, the sludge in the secondary sedimentation tank can be cleaned through the sludge cleaning device, the sludge in the secondary sedimentation tank can be timely discharged, and meanwhile, the sedimentation efficiency of the secondary sedimentation tank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a sewage denitrification device with a sampling function. Background Art

[0002] Sewage denitrification is the process of removing nitrogen compounds such as ammonia nitrogen and nitrate nitrogen in sewage. Nitrogen compounds are an important factor causing eutrophication of water bodies and environmental pollution. Therefore, denitrification is of great significance for protecting water resources and the ecological environment. The discharge of rural domestic sewage increases year by year, and sewage denitrification in rural areas becomes particularly important.

[0003] Patent No. CN202121487864.2 proposes an integrated treatment device for rural decentralized sewage with enhanced denitrification. By arranging an autotrophic denitrification filter in the shell and filling the autotrophic denitrification filter with denitrification filler, it can use integrated denitrification to biologically denitrify sewage in combination with the existing situation of rural sewage. The denitrification process does not require the addition of additional carbon sources, and is suitable for the specific working conditions of rural sewage treatment. It does not have a multi-layer sampling function, and cannot sample water samples at different heights in the anoxic tank and the aerobic tank. It cannot grasp the reaction conditions in the tank in time, causing some sewage treatment to fail to meet the standards and need to be reprocessed. There is no sludge cleaning device for the secondary sedimentation tank, causing the sludge in the secondary sedimentation tank to be unable to be completely discharged. Therefore, a technician in this field provides a sewage denitrification device with a sampling function to solve the problem that it does not have a multi-layer sampling function, cannot sample water samples at different heights in the anoxic tank and the aerobic tank, cannot grasp the reaction conditions in the tank in time, causing some sewage treatment to fail to meet the standards, and does not have a sludge cleaning device for the secondary sedimentation tank, causing the sludge in the secondary sedimentation tank to be unable to be completely discharged. Utility Model Content

[0004] The utility model aims to provide a sewage denitrification device with a sampling function to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sewage denitrification device with a sampling function comprises a base, an anoxic tank is fixedly installed on the left side of the base, a sewage input port is fixedly installed on the left side of the anoxic tank, an aerobic tank is fixedly installed on the right side of the base, sealing covers are fixedly installed on the upper sides of the anoxic tank and the aerobic tank, observation ports are installed on the sealing covers, and flip covers are connected to the observation ports through hinges, and multi-layer sampling devices are installed on the anoxic tank and the aerobic tank, and the multi-layer sampling devices include: an outer cylinder, an inner cylinder, a sampling cylinder and a stabilizing pedal, the outer cylinder is slidably connected to the sealing cover, the inner cylinder is slidably connected to the outer cylinder, a plurality of slots are arranged on the inner cylinder, a sampling cylinder is fixedly installed in each of the slots, and the stabilizing pedal is fixedly installed on the upper side of the outer cylinder, and the stabilizing pedal is tightly attached to the upper surface of the sealing cover.

[0007] As a further solution of the utility model: the sampling tube includes: a collecting tube, a water outlet and a release valve, the collecting tube is fixedly mounted on the groove of the inner tube, the water outlet is fixedly mounted on the lower side of the collecting tube, the release valve is fixedly mounted on the end of the water outlet away from the collecting tube, the side wall of the collecting tube has an opening, and a sealing mechanism is fixedly mounted at the opening of the side wall of the collecting tube.

[0008] As a further solution of the utility model: a plurality of first strip openings and second strip openings are arranged on the outer cylinder, each of the first strip openings is arranged correspondingly at the opening of the side wall of the collecting cylinder, and each of the second strip openings is arranged correspondingly at the water outlet.

[0009] As a further solution of the utility model: the sealing mechanism includes: a fixed frame and a sealing rubber ring, the fixed frame is fixedly installed at the opening of the side wall of the collecting tube, the sealing rubber ring is fixedly installed on the fixed frame, and the end of the sealing rubber ring away from the fixed frame is close to the inner wall of the outer tube.

[0010] As a further solution of the utility model: an elastic locking mechanism is installed on the multi-layer sampling device.

[0011] As a further solution of the utility model: the elastic locking mechanism includes: a fixed outer frame, a collecting handle and a spring, the fixed outer frame is fixedly installed on the upper side of the stabilizing pedal, the collecting handle is fixedly installed on the upper side of the inner cylinder, the spring is slidably connected to the upper side of the inner cylinder, the upper end of the spring is close to the fixed outer frame, and the lower end of the spring is close to the collecting handle.

[0012] As a further solution of the utility model: a secondary sedimentation tank is fixedly installed on the right side of the aerobic tank, a sludge outlet is fixedly installed on the lower side of the secondary sedimentation tank, a clean water outlet is fixedly installed on the right side of the secondary sedimentation tank, and a plurality of sludge cleaning devices are installed in the secondary sedimentation tank.

[0013] As a further solution of the utility model: the sludge cleaning device includes: an electric telescopic rod, a pushing frame and a pushing plate, a plurality of the electric telescopic rods are fixedly installed on the inner wall of the secondary sedimentation tank, the pushing frame is fixedly installed on the output end of the electric telescopic rod, and the pushing plate is fixedly installed on the lower side of the pushing frame.

[0014] As a further solution of the utility model: a first water pump is fixedly installed on the right side of the anoxic tank, a second water pump is fixedly installed on the lower side of the aerobic tank side wall, and a third water pump is fixedly installed on the upper side of the aerobic tank side wall. The input end of the first water pump is connected to the lower side of the anoxic tank through a water pipe, the output end of the first water pump is connected to the upper side of the aerobic tank through a water pipe, the input end of the second water pump is connected to the lower side of the aerobic tank through a water pipe, the output end of the second water pump is connected to the upper side of the second sedimentation tank through a water pipe, the input end of the third water pump is connected to the lower side of the second sedimentation tank through a water pipe, and the output end of the third water pump is connected to the upper side of the anoxic tank through a water pipe.

[0015] Compared with the prior art, the utility model has the following beneficial effects: a sewage denitrification device with a sampling function, when in use, sewage enters the anoxic tank through the sewage inlet, microorganisms are placed in the anoxic tank, under anoxic conditions, the microorganisms reduce the nitrate nitrogen in the sewage to nitrogen gas, the water in the anoxic tank enters the aerobic tank through the first water pump, microorganisms are placed in the aerobic tank, under aerobic conditions, the microorganisms oxidize the ammonia nitrogen in the sewage to nitrate nitrogen, the water in the aerobic tank enters the secondary sedimentation tank through the second water pump, mud and water are separated, the supernatant is discharged through the clean water outlet, a part of the precipitated sludge is returned to the anoxic tank through the third water pump, and a part is discharged as residual sludge through the sludge outlet When collecting water samples at different heights in an anoxic pool or an aerobic pool, both feet are placed on the stable pedal, and both hands pull the collection handle upward. The collection handle moves upward and the spring is compressed. The collection handle moves upward to drive the inner tube to move upward, and the collection tube on the inner tube moves upward. The opening on the side wall of the collection tube moves to the first strip opening of the outer tube. The liquid in the anoxic pool or the aerobic pool enters the collection tube through the first strip opening and the opening on the side wall of the collection tube. Multiple collection tubes on the inner tube are located at different heights in the anoxic pool or the aerobic pool, and samples at different heights can be collected at one time. The collection handle is released, and the compressed spring recovers to move the collection handle downward. The collection handle moves downward The inner cylinder is driven to move downward, the collecting cylinder on the inner cylinder moves downward, the opening of the side wall of the collecting cylinder moves to the inner wall of the outer cylinder, and the sealing rubber ring at the opening of the side wall of the collecting cylinder is tightly attached to the inner wall of the outer cylinder, so that the liquid in the collecting cylinder will not flow out of the collecting cylinder, and the multi-layer sampling device is taken out of the anoxic tank or the aerobic tank by fixing the outer frame, and the sample in the collecting cylinder is released by releasing the valve to facilitate inspection, and the power of the electric telescopic rod is turned on, and the push frame and the push plate are pushed by extending the electric telescopic rod. A plurality of the electric telescopic rods are fixedly installed on the inner wall of the secondary sedimentation tank, so that the push plate can push the sludge at the bottom of the secondary sedimentation tank to move in the general direction of the sludge output port of the secondary sedimentation tank, which is conducive to the sludge at the bottom of the secondary sedimentation tank to pass The sludge can be discharged smoothly through the sludge output port. Through the multi-layer sampling device, the equipment can sample water samples at different heights in the anoxic tank and the aerobic tank at the same time, which is conducive to timely grasping the reaction situation in the tank and saving sampling time. Through the sludge cleaning device, the sludge in the secondary sedimentation tank can be cleaned, which is conducive to timely discharge of the sludge in the secondary sedimentation tank and simultaneously improve the sedimentation efficiency of the secondary sedimentation tank. The utility model can sample water samples at different heights in the anoxic tank and the aerobic tank at the same time, which is conducive to timely grasping the reaction situation in the tank and saving sampling time. Through the sludge cleaning device, the sludge in the secondary sedimentation tank can be cleaned, which is conducive to timely discharge of the sludge in the secondary sedimentation tank and simultaneously improve the sedimentation efficiency of the secondary sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a front view of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model with part of the outer shell removed;

[0019] Figure 4 This is a schematic diagram of the structure of the multi-layer sampling device of the utility model;

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0021] In the figure: 1. base; 2. anoxic tank; 3. sewage inlet; 4. aerobic tank; 5. multi-layer sampling device; 51. outer cylinder; 52. inner cylinder; 53. sampling cylinder; 531. collecting cylinder; 532. water outlet; 533. release valve; 54. stabilizing pedal; 6. first strip opening; 7. second strip opening; 8. fixing frame; 9. sealing rubber ring; 10. elastic locking mechanism; 101. fixed outer frame; 102. collection handle; 103. spring; 11. sludge outlet; 12. clean water outlet; 13. sludge cleaning device; 131. electric telescopic rod; 132. push frame; 133. push plate; 14. first water pump; 15. second water pump; 16. third water pump; 17. second sedimentation tank. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 5 In an embodiment of the utility model, a sewage denitrification device with a sampling function comprises a base 1, an anoxic pool 2 is fixedly installed on the left side of the base 1, a sewage input port 3 is fixedly installed on the left side of the anoxic pool 2, an aerobic pool 4 is fixedly installed on the right side of the base 1, and sealing covers are fixedly installed on the upper sides of the anoxic pool 2 and the aerobic pool 4, and observation ports are installed on the sealing covers, and flip covers are connected to the observation ports through hinges, and multi-layer sampling devices 5 are installed on the anoxic pool 2 and the aerobic pool 4, and the multi-layer sampling device 5 comprises: an outer cylinder 51, an inner cylinder 52, a sampling cylinder 53 and a stabilizing pedal 54, the outer cylinder 51 is slidably connected to the sealing cover, the inner cylinder 52 is slidably connected to the outer cylinder 51, and a plurality of slots are provided on the inner cylinder 52, and a sampling cylinder 53 is fixedly installed in each slot, and a stabilizing pedal 54 is fixedly installed on the upper side of the outer cylinder 51, and the stabilizing pedal 54 is closely attached to the upper surface of the sealing cover;

[0024] The sampling tube 53 includes: a collecting tube 531, a water outlet 532 and a release valve 533. The collecting tube 531 is fixedly mounted on the slot of the inner tube 52, the water outlet 532 is fixedly mounted on the lower side of the collecting tube 531, the release valve 533 is fixedly mounted on the end of the water outlet 532 away from the collecting tube 531, the side wall of the collecting tube 531 has an opening, and a sealing mechanism is fixedly mounted at the opening of the side wall of the collecting tube 531;

[0025] The outer cylinder 51 is provided with a plurality of first strip openings 6 and second strip openings 7, each of the first strip openings 6 is correspondingly arranged at the opening of the side wall of the collecting cylinder 531, and each of the second strip openings 7 is correspondingly arranged at the water outlet 532;

[0026] The multiple sampling cylinders 53 on the inner cylinder 52 can simultaneously sample water levels at different heights in the anoxic pool 2 or the aerobic pool 4. The inner cylinder 52 moves upward, and the collecting cylinder 531 on the inner cylinder 52 moves upward, and the opening on the side wall of the collecting cylinder 531 moves to the first strip opening 6 of the outer cylinder 51, and the liquid in the anoxic pool 2 or the aerobic pool 4 enters the collecting cylinder 531 through the first strip opening 6 and the opening on the side wall of the collecting cylinder 531;

[0027] The sealing mechanism includes: a fixed frame 8 and a sealing rubber ring 9. The fixed frame 8 is fixedly mounted at the opening of the side wall of the collecting tube 531. The sealing rubber ring 9 is fixedly mounted on the fixed frame 8. One end of the sealing rubber ring 9 away from the fixed frame 8 is in close contact with the inner wall of the outer tube 51.

[0028] The inner tube 52 moves downward, the collecting tube 531 on the inner tube 52 moves downward, the opening of the side wall of the collecting tube 531 moves to the inner wall of the outer tube 51, and the sealing rubber ring 9 at the opening of the side wall of the collecting tube 531 is tightly attached to the inner wall of the outer tube 51, so that the liquid in the collecting tube 531 will not flow out of the collecting tube 531;

[0029] An elastic locking mechanism 10 is installed on the multi-layer sampling device 5;

[0030] The elastic locking mechanism 10 comprises: a fixed outer frame 101, a collection handle 102 and a spring 103. The fixed outer frame 101 is fixedly mounted on the upper side of the stabilizing pedal 54, the collection handle 102 is fixedly mounted on the upper side of the inner cylinder 52, the spring 103 is slidably connected to the upper side of the inner cylinder 52, the upper end of the spring 103 is in close contact with the fixed outer frame 101, and the lower end of the spring 103 is in close contact with the collection handle 102;

[0031] A secondary sedimentation tank 17 is fixedly installed on the right side of the aerobic tank 4, a sludge outlet 11 is fixedly installed on the lower side of the secondary sedimentation tank 17, a clean water outlet 12 is fixedly installed on the right side of the secondary sedimentation tank 17, and a plurality of sludge cleaning devices 13 are installed in the secondary sedimentation tank 17;

[0032] The sludge cleaning device 13 includes: an electric telescopic rod 131, a pushing frame 132 and a pushing plate 133. The multiple electric telescopic rods 131 are fixedly mounted on the inner wall of the secondary sedimentation tank 17. The pushing frame 132 is fixedly mounted on the output end of the electric telescopic rod 131. The pushing plate 133 is fixedly mounted on the lower side of the pushing frame 132.

[0033] The electric telescopic rod 131 is extended to push the push frame 132 and the push plate 133. The plurality of electric telescopic rods 131 are fixedly mounted on the inner wall of the secondary sedimentation tank 17, so that the push plate 133 can push the sludge at the bottom of the secondary sedimentation tank 17 to move in the general direction of the sludge outlet 11 of the secondary sedimentation tank 17, which is conducive to the smooth discharge of the sludge at the bottom of the secondary sedimentation tank 17 through the sludge outlet 11;

[0034] A first water pump 14 is fixedly installed on the right side of the anoxic tank 2, a second water pump 15 is fixedly installed on the lower side of the side wall of the aerobic tank 4, and a third water pump 16 is fixedly installed on the upper side of the side wall of the aerobic tank 4. The input end of the first water pump 14 is connected to the lower side of the anoxic tank 2 through a water pipe, and the output end of the first water pump 14 is connected to the upper side of the aerobic tank 4 through a water pipe. The input end of the second water pump 15 is connected to the lower side of the aerobic tank 4 through a water pipe, and the output end of the second water pump 15 is connected to the upper side of the secondary sedimentation tank 17 through a water pipe. The input end of the third water pump 16 is connected to the lower side of the secondary sedimentation tank 17 through a water pipe, and the output end of the third water pump 16 is connected to the upper side of the anoxic tank 2 through a water pipe.

[0035] The working principle of the utility model is:

[0036] A sewage denitrification device with a sampling function, when in use, sewage enters the anoxic tank 2 through the sewage input port 3, microorganisms are placed in the anoxic tank 2, under anoxic conditions, the microorganisms reduce the nitrate nitrogen in the sewage to nitrogen gas, the water of the anoxic tank 2 enters the aerobic tank 4 through the first water pump 14, the microorganisms are placed in the aerobic tank 4, under aerobic conditions, the microorganisms oxidize the ammonia nitrogen in the sewage to nitrate nitrogen, the water of the aerobic tank 4 enters the secondary sedimentation tank 17 through the second water pump 15, mud and water separation is carried out, the supernatant is discharged through the clean water output port 12, part of the precipitated sludge is returned to the anoxic tank 2 through the third water pump 16, and part of it is discharged as residual sludge through the sludge output port 11, and the anoxic tank 2 is carried out. When collecting water samples at different heights in the anoxic pool 2 or the aerobic pool 4, the feet are placed on the stabilizing pedal 54, and the collecting handle 102 is pulled upward with both hands. The collecting handle 102 moves upward and the spring 103 is compressed. The collecting handle 102 moves upward to drive the inner tube 52 to move upward, and the collecting tube 531 on the inner tube 52 moves upward. The opening on the side wall of the collecting tube 531 moves to the first strip opening 6 of the outer tube 51, and the liquid in the anoxic pool 2 or the aerobic pool 4 enters the collecting tube 531 through the first strip opening 6 and the opening on the side wall of the collecting tube 531. The multiple collecting tubes 531 on the inner tube 52 are located at different heights in the anoxic pool 2 or the aerobic pool 4, so samples at different heights can be collected at one time. The collecting handle 102 and the compressed spring 103 are restored to make the collecting handle 102 move downward, and the collecting handle 102 moves downward to drive the inner tube 52 to move downward, and the collecting tube 531 on the inner tube 52 moves downward, and the opening of the side wall of the collecting tube 531 moves to the inner wall of the outer tube 51, and the sealing rubber ring 9 at the opening of the side wall of the collecting tube 531 is close to the inner wall of the outer tube 51, so that the liquid in the collecting tube 531 will not flow out of the collecting tube 531, and the multi-layer sampling device 5 is taken out of the anoxic pool 2 or the aerobic pool 4 by fixing the outer frame 101, and the sample in the collecting tube 531 is released by releasing the valve 533 for convenient inspection, and the power of the electric telescopic rod 131 is turned on. The push frame 132 and the push plate 133 are extended to push, and the multiple electric telescopic rods 131 are fixedly installed on the inner wall of the secondary sedimentation tank 17, so that the push plate 133 can push the sludge at the bottom of the secondary sedimentation tank 17 to move in the general direction of the sludge outlet 11 of the secondary sedimentation tank 17, which is beneficial for the sludge at the bottom of the secondary sedimentation tank 17 to be discharged smoothly through the sludge outlet 11. The utility model can simultaneously sample water samples at different heights in the anoxic tank 2 and the aerobic tank 4, which is beneficial for timely grasping the reaction conditions in the tank and saving sampling time. The sludge in the secondary sedimentation tank 17 can be cleaned through the sludge cleaning device 13, which is beneficial for timely discharge of the sludge in the secondary sedimentation tank 17 and at the same time improves the sedimentation efficiency of the secondary sedimentation tank 17.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sewage denitrification device with a sampling function, comprising a base (1), characterized in that: The left side of the base (1) is fixedly provided with an anoxic pool (2), the left side of the anoxic pool (2) is fixedly provided with a sewage input port (3), the right side of the base (1) is fixedly provided with an aerobic pool (4), the upper sides of the anoxic pool (2) and the aerobic pool (4) are both fixedly provided with sealing covers, the sealing covers are both provided with observation ports, the observation ports are both connected with flip covers via hinges, the anoxic pool (2) and the aerobic pool (4) are both provided with multi-layer sampling devices (5), the multi-layer The sampling device (5) comprises: an outer cylinder (51), an inner cylinder (52), a sampling cylinder (53) and a stabilizing pedal (54); the outer cylinder (51) is slidably connected to a sealing cover; the inner cylinder (52) is slidably connected inside the outer cylinder (51); a plurality of slots are provided on the inner cylinder (52); a sampling cylinder (53) is fixedly installed in each of the slots; the stabilizing pedal (54) is fixedly installed on the upper side of the outer cylinder (51); and the stabilizing pedal (54) is in close contact with the upper surface of the sealing cover.

2. A sewage denitrification device with sampling function according to claim 1, characterized in that: The sampling tube (53) comprises: a collecting tube (531), a water outlet (532) and a release valve (533); the collecting tube (531) is fixedly mounted on the slot of the inner tube (52); the water outlet (532) is fixedly mounted on the lower side of the collecting tube (531); the release valve (533) is fixedly mounted on an end of the water outlet (532) away from the collecting tube (531); the side wall of the collecting tube (531) is provided with an opening; and a sealing mechanism is fixedly mounted at the opening of the side wall of the collecting tube (531).

3. A sewage denitrification device with sampling function according to claim 2, characterized in that: The outer cylinder (51) is provided with a plurality of first strip-shaped openings (6) and second strip-shaped openings (7), each of the first strip-shaped openings (6) being correspondingly arranged at an opening on a side wall of the collecting cylinder (531), and each of the second strip-shaped openings (7) being correspondingly arranged at a water outlet (532).

4. The sewage denitrification device with sampling function according to claim 3 is characterized in that: The sealing mechanism comprises: a fixed frame (8) and a sealing rubber ring (9); the fixed frame (8) is fixedly mounted at an opening of a side wall of the collecting tube (531); the sealing rubber ring (9) is fixedly mounted on the fixed frame (8); and one end of the sealing rubber ring (9) away from the fixed frame (8) is in close contact with the inner wall of the outer tube (51).

5. The sewage denitrification device with sampling function according to claim 4 is characterized in that: An elastic locking mechanism (10) is installed on the multi-layer sampling device (5).

6. The sewage denitrification device with sampling function according to claim 5, characterized in that: The elastic locking mechanism (10) comprises: a fixed outer frame (101), a collecting handle (102) and a spring (103); the fixed outer frame (101) is fixedly mounted on the upper side of the stabilizing pedal (54); the collecting handle (102) is fixedly mounted on the upper side of the inner cylinder (52); the spring (103) is slidably connected to the upper side of the inner cylinder (52); the upper end of the spring (103) is in close contact with the fixed outer frame (101); and the lower end of the spring (103) is in close contact with the collecting handle (102).

7. The sewage denitrification device with sampling function according to claim 6 is characterized in that: A secondary sedimentation tank (17) is fixedly installed on the right side of the aerobic tank (4), a sludge outlet (11) is fixedly installed on the lower side of the secondary sedimentation tank (17), a clean water outlet (12) is fixedly installed on the right side of the secondary sedimentation tank (17), and a plurality of sludge cleaning devices (13) are installed in the secondary sedimentation tank (17).

8. The sewage denitrification device with sampling function according to claim 7, characterized in that: The sludge cleaning device (13) comprises: an electric telescopic rod (131), a pushing frame (132) and a pushing plate (133); a plurality of the electric telescopic rods (131) are fixedly mounted on the inner wall of the secondary sedimentation tank (17); the pushing frame (132) is fixedly mounted on the output end of the electric telescopic rod (131); and the pushing plate (133) is fixedly mounted on the lower side of the pushing frame (132).

9. The sewage denitrification device with sampling function according to claim 8, characterized in that: A first water pump (14) is fixedly installed on the right side of the anoxic tank (2), a second water pump (15) is fixedly installed on the lower side of the side wall of the aerobic tank (4), and a third water pump (16) is fixedly installed on the upper side of the side wall of the aerobic tank (4). The input end of the first water pump (14) is connected to the lower side of the anoxic tank (2) through a water pipe, and the output end of the first water pump (14) is connected to the upper side of the aerobic tank (4) through a water pipe. The input end of the second water pump (15) is connected to the lower side of the aerobic tank (4) through a water pipe, and the output end of the second water pump (15) is connected to the upper side of the secondary sedimentation tank (17) through a water pipe. The input end of the third water pump (16) is connected to the lower side of the secondary sedimentation tank (17) through a water pipe, and the output end of the third water pump (16) is connected to the upper side of the anoxic tank (2) through a water pipe.

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