Oxidation ditch type sewage nitrogen and phosphorus removal device

Abstract

The utility model discloses an oxidation ditch type sewage nitrogen and phosphorus removal device, and relates to the technical field of sewage treatment. The oxidation ditch type sewage nitrogen and phosphorus removal device comprises a sewage aeration tank and a defoaming mechanism, the defoaming mechanism comprises a mounting plate, a threaded rod, a driving motor, a sliding block, a connecting rod, a fixing frame, a limiting strip and a rotating baffle, the mounting plate is fixedly connected to the surface of the sewage aeration tank, and the threaded rod is rotationally connected to the surface of the mounting plate; the driving motor is fixedly connected to the surface of the mounting plate, the output end of the driving motor is fixedly connected with the threaded rod, floating foam can be scraped into the foam treatment pond through movement of the rotating baffle, the water surface cleanliness is improved, the rotating baffle rotates on the outer surface of the connecting rod under water flow resistance when resetting, and the rotating baffle is driven to rotate. And therefore, a gap is formed between the rotating baffle and the fixing frame, floating foam can be discharged from the gap, the situation that the floating foam is scraped to the other side during resetting is avoided, the device is cleaner, and the cleaning difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an oxidation ditch type wastewater denitrification and phosphorus removal device. Background Technology

[0002] Oxidation ditches, also known as circulating aeration tanks or terminal-less aeration tanks, have a low overall power density, saving energy and adhering to the principle of conservation of momentum. Once the mixed liquor in the tank is accelerated to the required flow rate, the hydraulic power required to maintain circulation mainly overcomes the head loss along the path and in bends, thus resulting in low energy consumption. Oxidation ditches are suitable for treating urban sewage as well as industrial wastewater such as petroleum wastewater, chemical wastewater, papermaking wastewater, dyeing and printing wastewater, and food processing wastewater. Their advantages include simple process, convenient construction, easy fabrication of aeration brushes, and compact layout.

[0003] CN216236291U discloses an intermittent circulating aeration device for an aeration tank, comprising an air supply device, several sets of aeration mechanisms connected to the air supply device, and a controller for controlling the opening and closing of the aeration mechanisms. Each aeration mechanism includes an aeration main pipe connected to the air supply device, control valves mounted on the aeration main pipe, several aeration branch pipes connected to the aeration main pipe, and several aeration discs mounted on the aeration branch pipes. All control valves are connected to the controller. This device, through the cooperation of the air supply device, the several sets of aeration mechanisms, and the controller, can achieve intermittent circulating aeration in an aeration tank. The dry aeration system allows for circulating aeration, saving energy, but it has certain drawbacks. When in use, the aeration system discharges air from the bottom of the tank, easily generating a lot of foam on the water surface, which increases the difficulty of wastewater treatment. Existing defoaming methods are divided into two types: one is to add defoaming agent, but if the dosage and other factors are not matched, it may affect water quality; the other is to use scrapers to remove foam from the water surface, but the reciprocating motion of the scrapers causes the foam generated when the scrapers reset to be scraped to the other side, making it difficult to collect and polluting the environment. Therefore, an oxidation ditch type wastewater denitrification and phosphorus removal device is needed. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an oxidation ditch type wastewater denitrification and phosphorus removal device, which can solve the problem that when a scraper is set on the water surface to remove foam, the foam generated when the scraper reciprocates and resets is scraped to the other side, making it difficult to collect and thus increasing the difficulty of wastewater treatment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an oxidation ditch type wastewater denitrification and phosphorus removal device, comprising a wastewater aeration tank and a defoaming mechanism. The defoaming mechanism includes a mounting plate, a threaded rod, a drive motor, a slider, a connecting rod, a fixing frame, a limiting strip, and a rotating baffle. The mounting plate is fixedly connected to the surface of the wastewater aeration tank, the threaded rod is rotatably connected to the surface of the mounting plate, the drive motor is fixedly connected to the surface of the mounting plate, and the output end of the drive motor is fixedly connected to the threaded rod. The slider is threadedly sleeved on the outer surface of the threaded rod and slidably connected to the wastewater aeration tank. The connecting rod is fixedly connected to the surface of the slider, the fixing frame is fixedly sleeved on the outer surface of the connecting rod, the limiting strip is fixedly connected to the surface of the fixing frame, and the rotating baffle is rotatably sleeved on the outer surface of the connecting rod, with the rotating baffle in contact with the limiting strip.

[0006] Preferably, there are four mounting plates, which are fixedly connected to both sides of the sewage aeration tank; there are multiple fixing frames, which are equidistantly arranged on the outer surface of the connecting rod; there are multiple limiting strips, each of which is fixedly connected to the surface of the fixing frame; and there are multiple rotating baffles, which are located between two adjacent fixing frames.

[0007] Preferably, a sliding rod is provided on one side of the sewage aeration tank, the sliding rod is fixedly connected to the mounting plate, and the slider is slidably connected to the sliding rod.

[0008] Preferably, a sewage circulation tank is provided on one side of the sewage aeration tank, and a first connecting pipe A is fixedly connected to the surface of the sewage circulation tank. The first connecting pipe A is connected to the sewage aeration tank, and a first water pump A is provided on the surface of the first connecting pipe A.

[0009] Preferably, a second connecting pipe B is fixedly connected to the surface of the sewage aeration tank, the second connecting pipe B is connected to the sewage circulation tank, and a second water pump B is provided on the surface of the second connecting pipe B.

[0010] Preferably, multiple synchronous motors are fixedly connected to the surface of the wastewater aeration tank, and a rotating rod is fixedly connected to the output end of each synchronous motor. A stirring blade is fixedly connected to the outer surface of each rotating rod, and each rotating rod is rotatably connected to the wastewater aeration tank.

[0011] Preferably, an aeration device is fixedly connected to the surface of the sewage aeration tank, and an aeration disc is fixedly connected to the bottom of the sewage aeration tank.

[0012] Preferably, a foam treatment tank is provided on one side of the sewage aeration tank, and multiple drainage pipes are fixedly connected to the surface of the sewage circulation tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This oxidation ditch type wastewater denitrification and phosphorus removal device can scrape scum into the interior of the foam treatment tank by moving the rotating baffle, improving the cleanliness of the water surface. When the rotating baffle is reset, it is resisted by the water flow and will rotate on the outer surface of the connecting rod, thereby creating a gap between the rotating baffle and the fixed frame. The scum can be discharged from the gap, avoiding the scum being scraped to the other side when resetting, making the device cleaner and reducing the difficulty of cleaning. It solves the problem that when using a scraper to remove scum from the water surface, the scum generated during the reciprocating motion of the scraper is scraped to the other side, making it difficult to collect and thus increasing the difficulty of wastewater treatment. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the main body of this utility model;

[0017] Figure 2 This is a schematic diagram of the connecting rod of this utility model;

[0018] Figure 3 For the present utility model Figure 1 Schematic diagram at point A in the middle;

[0019] Figure 4 For the present utility model Figure 2 Schematic diagram at point B in the middle;

[0020] Figure 5 This is a schematic diagram of the synchronous motor of this utility model;

[0021] Figure 6 This is a schematic diagram of the rotating rod of this utility model.

[0022] Reference numerals in the attached drawings: 1. Wastewater aeration tank; 2. Wastewater circulation tank; 3. Foam treatment tank; 4. Aeration generating device; 5. Aeration disc; 6. First connecting pipe A; 7. First water pump A; 8. Mounting plate; 9. Threaded rod; 10. Drive motor; 11. Sliding block; 12. Connecting rod; 13. Fixing frame; 14. Limiting strip; 15. Rotating baffle; 16. Sliding rod; 17. Second connecting pipe B; 18. Second water pump B; 19. Drainage pipe; 20. Synchronous motor; 21. Rotating rod; 22. Agitator blade. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Please see Figure 1-6 This utility model provides a technical solution: an oxidation ditch type wastewater denitrification and phosphorus removal device, including a wastewater aeration tank 1 and a defoaming mechanism. The defoaming mechanism includes an installation plate 8, a threaded rod 9, a drive motor 10, a slider 11, a connecting rod 12, a fixing frame 13, a limiting strip 14, and a rotating baffle 15. The installation plate 8 is fixedly connected to the surface of the wastewater aeration tank 1. The threaded rod 9 is rotatably connected to the surface of the installation plate 8. The drive motor 10 is fixedly connected to the surface of the installation plate 8, and the output end of the drive motor 10 is fixedly connected to the threaded rod 9. The slider 11 is threadedly sleeved on the outer surface of the threaded rod 9 and is slidably connected to the wastewater aeration tank 1. The connecting rod 12 is fixedly connected to the surface of the slider 11. The fixing frame 13 is fixedly sleeved on the outer surface of the connecting rod 12. The limiting strip 14 is fixedly connected to the surface of the fixing frame 13. The rotating baffle 15 is rotatably sleeved on the outer surface of the connecting rod 12 and is in contact with the limiting strip 14.

[0028] Furthermore, there are four mounting plates 8, which are fixedly connected to both sides of the sewage aeration tank 1. There are multiple fixing frames 13, which are evenly spaced on the outer surface of the connecting rod 12. There are multiple limiting strips 14, and each limiting strip 14 is fixedly connected to the surface of the fixing frame 13. There are multiple rotating baffles 15, which are located between two adjacent fixing frames 13. A sliding rod 16 is provided on one side of the sewage aeration tank 1. The sliding rod 16 is fixedly connected to the mounting plate 8, and the slider 11 is slidably connected to the sliding rod 16.

[0029] Furthermore, a sewage circulation tank 2 is provided on one side of the sewage aeration tank 1. A first connecting pipe A6 is fixedly connected to the surface of the sewage circulation tank 2, and the first connecting pipe A6 is connected to the sewage aeration tank 1. A first water pump A7 is provided on the surface of the first connecting pipe A6. A second connecting pipe B17 is fixedly connected to the surface of the sewage aeration tank 1, and the second connecting pipe B17 is connected to the sewage circulation tank 2. A second water pump B18 is provided on the surface of the second connecting pipe B17. Multiple synchronous motors 20 are fixedly connected to the surface of the sewage aeration tank 1. A rotating rod 21 is fixedly connected to the output end of each synchronous motor 20. A stirring blade 22 is fixedly connected to the outer surface of each rotating rod 21. Each rotating rod 21 is rotatably connected to the sewage aeration tank 1. An aeration generating device 4 is fixedly connected to the surface of the sewage aeration tank 1. An aeration disc 5 is fixedly connected to the bottom of the sewage aeration tank 1. A foam treatment tank 3 is provided on one side of the sewage aeration tank 1. Multiple drain pipes 19 are fixedly connected to the surface of the sewage circulation tank 2.

[0030] Furthermore, the aeration generator 4 can blow gas out of the aeration disc 5, and the aeration disc 5 is located at the bottom of the sewage aeration tank 1, which can prevent impurities from settling and affecting water quality. The synchronous motor 20 drives the rotating rod 21 and the stirring blade 22 to rotate, which agitates the sewage inside the sewage aeration tank 1, further preventing sedimentation. The drive motor 10 is started to drive the threaded rod 9 to rotate, causing the slider 11 to slide on the surface of the threaded rod 9, which drives the connecting rod 12 and the fixing frame 13 to move. Then, the rotating baffle 15 scrapes the foam. The bottom of the rotating baffle 15 is located below the water surface. When scraping the foam, the limiting strip 14 can control the rotation. The rotation of baffle 15 is limited, allowing the foam to be scraped into the foam treatment tank 3. When the connecting rod 12 is reset, the rotating baffle 15 is resisted by the water flow and will rotate on the outer surface of the connecting rod 12, thereby forming a gap between the rotating baffle 15 and the fixing frame 13. The foam can be discharged from the gap, preventing the foam from being scraped to the other side when resetting. The first water pump A7 is started to pump the sewage in the sewage aeration tank 1 into the sewage circulation tank 2. The sewage is tested. If the water quality is qualified, it is discharged from the drain pipe 19. If the water quality is unqualified, the second water pump B18 is started to pump the sewage in the sewage circulation tank 2 back into the sewage aeration tank 1.

[0031] Furthermore, the aeration disc 5 and stirring blade 22 generate kinetic energy in the sewage inside the sewage aeration tank 1, preventing impurities from settling and affecting water quality. This prevents sediment from settling to the bottom of the sewage aeration tank 1, reducing the difficulty of water treatment. The movement of the rotating baffle 15 can scrape the foam into the foam treatment tank 3, improving the cleanliness of the water surface. When the rotating baffle 15 resets, it is resisted by the water flow and will rotate on the outer surface of the connecting rod 12, thus forming a gap between the rotating baffle 15 and the fixed frame 13. The foam can be discharged from the gap, preventing the foam from being scraped to the other side during reset, making the device cleaner and reducing the difficulty of cleaning. This solves the problem that when a scraper is used to remove foam from the water surface, the foam generated during the reciprocating motion of the scraper is scraped to the other side, making it difficult to collect and increasing the difficulty of sewage treatment. The sewage circulation tank 2 facilitates the testing of sewage treatment effect.

[0032] Structural Description: Wastewater Aeration Tank 1: A container that promotes the exchange of substances between gas and liquid;

[0033] Wastewater circulation tank 2: Located on one side of wastewater aeration tank 1, it temporarily stores wastewater;

[0034] Foam treatment tank 3: Located on the other side of sewage aeration tank 1, it collects foam.

[0035] Aeration generating device 4: A device that provides gas and is fixed to the surface of the sewage aeration tank 1. It is connected to the aeration disc 5 through a pipe. Refer to the aeration mechanism in announcement number CN216236291U.

[0036] Aeration disc 5: Fixed to the bottom of the sewage aeration tank 1, providing gas;

[0037] First connecting pipe A6: fixedly connected to the surface of sewage aeration tank 1 and sewage circulation tank 2, used for liquid flow;

[0038] First water pump A7: installed on the surface of first connecting pipe A6, used to provide power for liquid flow;

[0039] Mounting plate 8: It is fixed to the surface of the sewage aeration tank 1. There are multiple mounting plates 8, and two are set together on both sides of the sewage aeration tank 1.

[0040] Threaded rod 9: Rotatably connected to the surface of mounting plate 8 for the movement of slider 11;

[0041] Drive motor 10: Fixed to the surface of mounting plate 8, providing power to threaded rod 9;

[0042] Slider 11: Threaded onto the outer surface of threaded rod 9, used to connect the movement of rod 12;

[0043] Connecting rod 12: fixed to the surface of slider 11, used for the movement of fixed frame 13;

[0044] Fixing bracket 13: Fixed to the outer surface of connecting rod 12. There are multiple fixing brackets 13, which are used to restrict the rotation of rotating baffle 15.

[0045] Limiting strip 14: Fixed to the surface of the fixed frame 13, there are multiple limiting strips 14, used to limit the rotation of the rotating baffle 15;

[0046] Rotating baffle 15: Rotatably connected to the outer surface of connecting rod 12, used to scrape off foam;

[0047] Slide bar 16: Fixed to the surface of mounting plate 8, providing stability for the movement of slider 11;

[0048] Synchronous motor 20: Fixed to the surface of the sewage aeration tank 1, there are multiple synchronous motors 20, which provide power to the rotating rod 21;

[0049] Rotating rod 21: Rotatably connected inside the sewage aeration tank 1, the same number as the synchronous motor 20, used for rotating the stirring blade 22;

[0050] Stirring blade 22: Fixed to the outer surface of rotating rod 21, used to stir sewage.

[0051] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An oxidation ditch-type wastewater denitrification and phosphorus removal device, characterized in that, include: Wastewater aeration tank (1); The defoaming mechanism includes a mounting plate (8), a threaded rod (9), a drive motor (10), a slider (11), a connecting rod (12), a fixing frame (13), a limiting strip (14), and a rotating baffle (15). The mounting plate (8) is fixedly connected to the surface of the sewage aeration tank (1), the threaded rod (9) is rotatably connected to the surface of the mounting plate (8), and the drive motor (10) is fixedly connected to the surface of the mounting plate (8). The output end of the drive motor (10) is connected to the threaded rod (9). The slider (11) is threaded onto the outer surface of the threaded rod (9), and the slider (11) is slidably connected to the sewage aeration tank (1). The connecting rod (12) is fixedly connected to the surface of the slider (11), the fixing frame (13) is fixedly fitted onto the outer surface of the connecting rod (12), the limiting strip (14) is fixedly connected to the surface of the fixing frame (13), and the rotating baffle (15) is rotatably fitted onto the outer surface of the connecting rod (12). The rotating baffle (15) is in contact with the limiting strip (14).

2. The oxidation ditch type wastewater denitrification and phosphorus removal device according to claim 1, characterized in that: The number of mounting plates (8) is four and they are fixedly connected to both sides of the sewage aeration tank (1). The number of fixing frames (13) is multiple and they are all equidistantly arranged on the outer surface of the connecting rod (12). The number of limiting strips (14) is multiple and each limiting strip (14) is fixedly connected to the surface of the fixing frame (13). The number of rotating baffles (15) is multiple and they are all located between two adjacent fixing frames (13).

3. The oxidation ditch type wastewater denitrification and phosphorus removal device according to claim 1, characterized in that: A slide bar (16) is provided on one side of the sewage aeration tank (1). The slide bar (16) is fixedly connected to the mounting plate (8), and the slider (11) is slidably connected to the slide bar (16).

4. The oxidation ditch type wastewater denitrification and phosphorus removal device according to claim 1, characterized in that: A sewage circulation tank (2) is provided on one side of the sewage aeration tank (1). A first connecting pipe A (6) is fixedly connected to the surface of the sewage circulation tank (2). The first connecting pipe A (6) is connected to the sewage aeration tank (1). A first water pump A (7) is provided on the surface of the first connecting pipe A (6).

5. The oxidation ditch type wastewater denitrification and phosphorus removal device according to claim 1, characterized in that: The surface of the sewage aeration tank (1) is fixedly connected to a second connecting pipe B (17), which is connected to the sewage circulation tank (2). A second water pump B (18) is installed on the surface of the second connecting pipe B (17).

6. The oxidation ditch type wastewater denitrification and phosphorus removal device according to claim 1, characterized in that: Multiple synchronous motors (20) are fixedly connected to the surface of the sewage aeration tank (1). Each synchronous motor (20) has a rotating rod (21) fixedly connected to its output end. Each rotating rod (21) has a stirring blade (22) fixedly connected to its outer surface. Each rotating rod (21) is rotatably connected to the sewage aeration tank (1).

7. The oxidation ditch type wastewater denitrification and phosphorus removal device according to claim 1, characterized in that: An aeration device (4) is fixedly connected to the surface of the sewage aeration tank (1), and an aeration disc (5) is fixedly connected to the bottom of the sewage aeration tank (1).

8. The oxidation ditch type wastewater denitrification and phosphorus removal device according to claim 1, characterized in that: A foam treatment tank (3) is provided on one side of the sewage aeration tank (1), and multiple drainage pipes (19) are fixedly connected to the surface of the sewage circulation tank (2).

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