Biological nitrogen and phosphorus removal device

Abstract

The utility model relates to the technical field of biological nitrogen and phosphorus removal equipment, in particular to a biological nitrogen and phosphorus removal device. The utility model provides a biological nitrogen and phosphorus removal device convenient for cleaning sludge. The biological nitrogen and phosphorus removal device comprises a mounting seat, an anaerobic chamber, an anoxic chamber, an aerobic chamber, a sedimentation tank, a shunt pipe, a screw rod, a limiting rod, a first scraper blade and the like, four chambers are arranged in the mounting seat and sequentially comprise an anaerobic chamber, an anoxic chamber, an aerobic chamber and a sedimentation tank from front to back, the rear part of the mounting seat is rotatably connected with a screw rod, the rear part of the mounting seat is provided with a limiting rod, the limiting rod is located behind the screw rod, the limiting rod and the screw rod are both located in the sedimentation tank, and first scraping plates are symmetrically connected between the limiting rod and the screw rod in a sliding manner; the first scraper contacts with the bottom of the mounting seat. By rotating the screw rod, the two first scrapers move towards the middle along the limiting rod, and sludge attached to the bottom of the sedimentation tank is scraped, so that the effect of cleaning the sludge is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of biological denitrification and dephosphorization equipment, in particular to a biological denitrification and dephosphorization device. Background Art

[0002] Biological denitrification and phosphorus removal refers to the process of removing nutrients nitrogen and phosphorus from sewage by biological treatment. The biological methods used include activated sludge method and biofilm method, among which the most representative is the activated sludge method.

[0003] The activated sludge process is an aerobic biological treatment method for sewage, which mainly utilizes aerobic and anaerobic environments to remove nitrogen and phosphorus, and then precipitates the sludge and returns it through a sludge pump. In the existing biological denitrification and phosphorus removal equipment, some sludge will adhere to the bottom of the sedimentation tank, which is not convenient for the sludge pump to return the sludge, and will affect the effect of biological denitrification and phosphorus removal.

[0004] Therefore, we provide a biological denitrification and phosphorus removal device that is easy to clean sludge. Utility Model Content

[0005] In order to overcome the disadvantage that part of the sludge adheres to the bottom of the sedimentation tank and is inconvenient for the sludge pump to return the sludge, the utility model provides a biological denitrification and dephosphorization device which is convenient for cleaning the sludge.

[0006] The technical scheme of the utility model is as follows: a biological denitrification and phosphorus removal device comprises a mounting seat, an anaerobic chamber, an anoxic chamber, an aerobic chamber, a sedimentation tank, a one-way valve, an inlet pipe, an outlet pipe, a sludge pump, a diversion pipe, a screw rod, a limit rod and a first scraper. Four chambers are arranged in the mounting seat, which are the anaerobic chamber, the anoxic chamber, the aerobic chamber and the sedimentation tank from front to back. A one-way valve is arranged between two adjacent chambers. A water inlet pipe is arranged at the upper front side of the mounting seat, a water outlet pipe is arranged at the rear side of the upper part of the mounting seat, a diversion pipe is connected to the bottom of the sedimentation tank, a sludge pump is arranged at the bottom of the mounting seat, a water inlet pipe is connected to the front side of the sludge pump, a diversion pipe is connected to the rear side of the sludge pump, a screw rod is rotatably connected to the rear of the mounting seat, a limit rod is arranged at the rear of the mounting seat, the limit rod is located behind the screw rod, the limit rod and the screw rod are both located in the sedimentation tank, a first scraper is symmetrically slidably connected between the limit rod and the screw rod, and the first scraper contacts the bottom of the mounting seat.

[0007] As a preferred technical solution of the utility model, it also includes a second scraper and a spring. The second scraper is slidably arranged on the first scraper, and a spring is arranged in the first scraper. Both ends of the spring are respectively connected to the first scraper and the second scraper.

[0008] As a preferred technical solution of the utility model, it also includes a motor and a scraper rod. The motor is installed on the mounting seat, and the scraper rod is connected to the output shaft of the motor. The scraper rod is located in the sedimentation tank.

[0009] As a preferred technical solution of the utility model, it also includes a transmission belt and a stirring rod. The stirring rod is rotatably arranged on the mounting seat, the stirring rod is located in the aerobic chamber, and a transmission belt is wound between the scraper rod and the stirring rod.

[0010] As a preferred technical solution of the utility model, it also includes a storage box, a valve and a sealing cover. The storage box is installed on the mounting seat, the storage box is located above the anoxic chamber, a valve is connected between the storage box and the anoxic chamber, and a sealing cover is provided above the storage box.

[0011] As a preferred technical solution of the utility model, the sealing cover is made of rubber.

[0012] The beneficial effect of the utility model is that the utility model rotates the screw rod to make the two first scrapers move toward the middle along the limit rod to scrape off the sludge attached to the bottom of the sedimentation tank. When the first scraper moves toward the middle, the edge of the mounting seat no longer squeezes the second scraper, so that the original compression spring is reset, and then squeezes the second scraper to move outward, increasing the cleaning area, thereby achieving a better sludge cleaning effect.

[0013] The utility model starts a motor, which drives a scraper rod to rotate, and then breaks up the sludge at the discharge port at the bottom of the sedimentation tank, thereby achieving the effect of cleaning the discharge port at the bottom of the sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of components such as the water inlet pipe and the water outlet pipe of the utility model.

[0016] Figure 3 It is a three-dimensional cross-sectional structural schematic diagram of components such as a screw rod and a limit rod of the utility model.

[0017] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the first scraper, the second scraper and other components of the utility model.

[0018] Figure 5 It is a three-dimensional cross-sectional structural schematic diagram of the one-way valve, motor, scraper rod and other components of the utility model.

[0019] Figure 6 It is a three-dimensional cross-sectional structural schematic diagram of components such as a transmission belt and a stirring rod of the utility model.

[0020] Figure 7 It is a three-dimensional cross-sectional structural schematic diagram of the storage box, valve, sealing cover and other parts of the utility model.

[0021] Marked in the figure: 1: mounting base, 2: anaerobic chamber, 3: anoxic chamber, 4: aerobic chamber, 5: sedimentation tank, 6: one-way valve, 7: water inlet pipe, 701: water outlet pipe, 8: sludge pump, 801: diversion pipe, 9: screw rod, 10: limit rod, 11: first scraper, 12: second scraper, 13: spring, 14: motor, 15: scraper rod, 16: transmission belt, 17: stirring rod, 18: storage box, 19: valve, 20: sealing cover. DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0023] Example 1

[0024] A biological denitrification and phosphorus removal device, such as Figure 1-Figure 7 As shown, it includes a mounting base 1, an anaerobic chamber 2, an anoxic chamber 3, an aerobic chamber 4, a sedimentation tank 5, a one-way valve 6, an inlet pipe 7, an outlet pipe 701, a sludge pump 8, a shunt pipe 801, a screw rod 9, a limit rod 10, a first scraper 11, a second scraper 12 and a spring 13. Four chambers are arranged in the mounting base 1, which are the anaerobic chamber 2, the anoxic chamber 3, the aerobic chamber 4 and the sedimentation tank 5 from front to back. A one-way valve 6 is arranged between two adjacent chambers. An inlet pipe 7 is welded to the upper front side of the mounting base 1, an outlet pipe 701 is welded to the rear side of the upper part of the mounting base 1, a shunt pipe 801 is welded to the bottom of the sedimentation tank 5, a sludge pump 8 is arranged at the bottom of the mounting base 1, and a sludge pump The front side of 8 is connected to the water inlet pipe 7, the rear side of the sludge pump 8 is connected to the diversion pipe 801, the rear part of the mounting seat 1 is rotatably connected to the screw rod 9, the rear part of the mounting seat 1 is welded with a limit rod 10, the limit rod 10 is located behind the screw rod 9, the limit rod 10 and the screw rod 9 are both located in the sedimentation tank 5, and a first scraper 11 for cleaning sludge is symmetrically slidably connected between the limit rod 10 and the screw rod 9. The first scraper 11 is in contact with the bottom of the mounting seat 1, and a second scraper 12 is slidably provided on the first scraper 11. A spring 13 for resetting the second scraper 12 is provided in the first scraper 11, and both ends of the spring 13 are respectively connected to the first scraper 11 and the second scraper 12.

[0025] When biological denitrification and phosphorus removal is required for sewage, the sewage is first transported to the anaerobic chamber 2 through the water inlet pipe 7, where the sewage completes ammoniation and releases phosphorus, and then enters the anoxic chamber 3 through the one-way valve 6. Under the anaerobic environment, the nitrogen compounds in the water are converted into gaseous nitrogen through the metabolism of microorganisms, and then enters the aerobic chamber 4 through the one-way valve 6. Some specific microorganisms adsorb phosphorus in the phosphorus-containing wastewater, and then enter the sedimentation tank 5 through the one-way valve 6, and then the sludge is precipitated. The treated sewage is then transmitted out through the outlet pipe 701, and then the sludge pump 8 is started to transmit the sludge to the water inlet pipe 7 through the diversion pipe 801, so that the microorganisms in the sludge are integrated with the sewage that comes in later, and then the sludge is discharged. A pump is connected to the other end of the bypass pipe 801 to discharge the sludge that does not need to be returned. Because the sludge is sticky, part of the sludge will adhere to the bottom of the sedimentation tank 5, which is not convenient for the sludge pump 8 to return the sludge. When the sludge needs to be processed, the screw 9 is rotated to make the two first scrapers 11 move toward the middle along the limit rod 10 to scrape off the sludge attached to the bottom of the sedimentation tank 5, thereby achieving the effect of cleaning the sludge; when the first scraper 11 moves toward the middle, the edge of the mounting seat 1 no longer squeezes the second scraper 12, so that the original compression spring 13 is reset, and then squeezes the second scraper 12 to move outward, increasing the cleaning area, thereby achieving a better effect of cleaning the sludge.

[0026] Example 2

[0027] On the basis of Example 1, Figure 5-Figure 7 As shown, it also includes a motor 14, a scraper rod 15, a transmission belt 16, a stirring rod 17, a storage box 18, a valve 19 and a sealing cover 20. The motor 14 is installed on the mounting base 1, and the scraper rod 15 is connected to the output shaft of the motor 14. The scraper rod 15 is located in the sedimentation tank 5. The mounting base 1 is rotatably provided with a stirring rod 17, and the stirring rod 17 is located in the aerobic chamber 4. A transmission belt 16 is wound between the scraper rod 15 and the stirring rod 17. The mounting base 1 is fixed with a storage box 18 by bolts. The storage box 18 is located above the anoxic chamber 3. A valve 19 is connected between the storage box 18 and the anoxic chamber 3. A sealing cover 20 is provided above the storage box 18. The sealing cover 20 is made of rubber material to enhance the sealing of the storage box 18.

[0028] The sludge is sticky, so it may block the discharge port at the bottom of the sedimentation tank 5, affecting the use of the sludge pump 8. When we need to clean the discharge port at the bottom of the sedimentation tank 5, we start the motor 14, and the motor 14 drives the scraper rod 15 to rotate, and then breaks up the sludge at the discharge port at the bottom of the sedimentation tank 5, so as to achieve the effect of cleaning the discharge port at the bottom of the sedimentation tank 5; when the scraper rod 15 rotates, the driving belt 16 drives the stirring rod 17 to rotate, and then stirs the sewage inside, so as to achieve the effect of fully integrating the sewage and oxygen. In the process of biological denitrification and phosphorus removal, adding an appropriate amount of carbon source in the anoxic section can obtain a better denitrification rate. The staff can open the sealing cover 20, then put the carbon source into the storage box 18, and then add the carbon source into the anoxic chamber 3 by opening the valve 19, so as to achieve the effect of quantitatively adding the carbon source.

[0029] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all modifications and equivalent structures and functions.

Claims

1. A biological denitrification and phosphorus removal device, characterized in that: The invention comprises a mounting seat (1), an anaerobic chamber (2), an anoxic chamber (3), an aerobic chamber (4), a sedimentation tank (5), a one-way valve (6), an inlet pipe (7), an outlet pipe (701), a sludge pump (8), a diversion pipe (801), a screw rod (9), a limit rod (10) and a first scraper (11). The mounting seat (1) is provided with four chambers, which are the anaerobic chamber (2), the anoxic chamber (3), the aerobic chamber (4) and the sedimentation tank (5) from front to back. A one-way valve (6) is provided between two adjacent chambers. The upper front part of the mounting seat (1) is provided with an inlet pipe (7), and the upper rear part of the mounting seat (1) is provided with an outlet pipe (701). The bottom of the sedimentation tank (5) is connected to a shunt pipe (801), the bottom of the mounting seat (1) is provided with a sludge pump (8), the front side of the sludge pump (8) is connected to a water inlet pipe (7), the rear side of the sludge pump (8) is connected to the shunt pipe (801), the rear of the mounting seat (1) is rotatably connected to a screw rod (9), the rear of the mounting seat (1) is provided with a limit rod (10), the limit rod (10) is located behind the screw rod (9), the limit rod (10) and the screw rod (9) are both located in the sedimentation tank (5), a first scraper (11) is symmetrically slidably connected between the limit rod (10) and the screw rod (9), and the first scraper (11) is in contact with the bottom of the mounting seat (1).

2. A biological denitrification and phosphorus removal device as claimed in claim 1, characterized in that: It also includes a second scraper (12) and a spring (13). The second scraper (12) is slidably arranged on the first scraper (11). The spring (13) is arranged inside the first scraper (11). The two ends of the spring (13) are respectively connected to the first scraper (11) and the second scraper (12).

3. A biological denitrification and phosphorus removal device as claimed in claim 2, characterized in that: It also includes a motor (14) and a scraper (15); the motor (14) is mounted on the mounting seat (1); the scraper (15) is connected to the output shaft of the motor (14); and the scraper (15) is located in the sedimentation tank (5).

4. A biological denitrification and phosphorus removal device as claimed in claim 3, characterized in that: It also comprises a transmission belt (16) and a stirring rod (17). The stirring rod (17) is rotatably arranged on the mounting seat (1). The stirring rod (17) is located in the aerobic chamber (4). The transmission belt (16) is wound between the scraper rod (15) and the stirring rod (17).

5. A biological denitrification and phosphorus removal device as claimed in claim 4, characterized in that: The invention also comprises a storage box (18), a valve (19) and a sealing cover (20); the storage box (18) is installed on the mounting seat (1); the storage box (18) is located above the anoxic chamber (3); a valve (19) is connected between the storage box (18) and the anoxic chamber (3); and a sealing cover (20) is provided above the storage box (18).

6. A biological denitrification and phosphorus removal device as claimed in claim 5, characterized in that: The sealing cover (20) is made of rubber.

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