Multistage air floatation tank for wastewater treatment

Abstract

The utility model discloses a multistage floatation tank for wastewater treatment, which belongs to the technical field of wastewater treatment, and comprises a plurality of treatment tanks and a plurality of slag scrapers, a shell is arranged outside the plurality of treatment tanks, each slag scraper is respectively positioned in the corresponding treatment tank, a servo motor is mounted on the side wall of the shell, and the servo motor is connected with the slag scrapers. The output end of the servo motor is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is sleeved with a plurality of first lantern rings, the position of each first lantern ring corresponds to the position of one treatment pond, the outer wall of each first lantern ring is fixedly connected with a vertical rod, the other end of each vertical rod is fixedly connected with a curved rod, and the other end of each curved rod is provided with a rotating block; the rotating block is slidably connected with the side wall of one end of the rotating frame away from the inner wall of the treatment tank. The filter screen and the rotating frame are arranged on the side wall of the treatment tank, so that scum in wastewater can be collected on the filter screen when the scum scraper is used for scraping scum, the scum is prevented from being adhered to the side wall of the treatment tank, and the environment of the treatment tank is favorably kept.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and particularly relates to a multi-stage air flotation tank for wastewater treatment. Background Technique

[0002] The multi-stage air flotation tank is an advanced physical treatment technology used in the process of wastewater treatment, mainly used to remove suspended solids, oils, colloids and other fine particles that are not easily sedimented in water. This technology introduces a large number of tiny bubbles into the wastewater, so that these bubbles adhere to the pollutant particles in the wastewater, thereby increasing the buoyancy of the particles and making them quickly float to the water surface to form scum. Then, the scum is removed by mechanical means such as a slag scraper to achieve solid-liquid separation. The multi-stage air flotation tank is called "multi-stage" because it usually contains multiple series-connected air flotation units;

[0003] Chinese Patent with the publication number of CN221217268U discloses a multi-stage air flotation tank for wastewater treatment. By rotating the elastic scraping plate, the scum floating on the liquid surface of each treatment tank is pushed. However, when the elastic scraping plate pushes the scum, the scum will be pushed towards the side wall of the treatment tank. Some scum will stick to the side wall due to this, some scum will be brought back into the wastewater when the wastewater churns next time, and some will stick to the side wall all the time, which not only affects the hygiene of the treatment tank, but also provides nutrients for microorganisms, making the environment in the treatment tank deteriorate. At present, these scum sticking to the side wall of the treatment tank need to be manually removed by workers, which not only has low work efficiency but also is relatively dangerous.

[0004] Therefore, we propose a multi-stage air flotation tank for wastewater treatment to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems in the prior art, and a multi-stage air flotation tank for wastewater treatment is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A multi-stage air flotation tank for wastewater treatment includes a plurality of treatment tanks and a plurality of slag scrapers. An outer shell is commonly arranged outside the plurality of treatment tanks. Each slag scraper is respectively located in a corresponding treatment tank. A servo motor is installed on the side wall of the outer shell. The output end of the servo motor is fixedly connected with a rotating shaft. A plurality of first collars are sleeved on the outer wall of the rotating shaft. The position of each first collar corresponds to the position of a treatment tank. A vertical rod is fixedly connected to the outer wall of the first collar. The other end of the vertical rod is fixedly connected with a curved rod. A rotating block is installed at the other end of the curved rod. The inner wall of the treatment tank is rotatably connected with a rotating frame. A filter screen is installed on the inner wall of the rotating frame. The rotating block is slidably connected with the side wall of the rotating frame far away from the inner wall of the treatment tank.

[0008] Preferably, a cross plate is fixedly connected to the outside of the rotating shaft. A transverse groove is formed in the inner wall of the first collar, and the cross plate is slidably connected to the inner wall of the transverse groove.

[0009] Preferably, a second collar is sleeved outside the vertical rod. A connecting rod is fixedly connected to the side wall of the second collar. The other end of the connecting rod is fixedly connected to a third collar. A moving rod is movably sleeved inside the third collar. A threaded rod is fixedly connected to the bottom wall of the moving rod. A plurality of threaded holes are formed in the side wall of the rotating shaft, and the threaded rod is threadedly connected to the threaded holes.

[0010] Preferably, a handle is fixedly connected to the top of the moving rod, and the outer diameter of the handle is larger than the outer diameter of the moving rod.

[0011] Preferably, a T-shaped groove is formed in the side wall of the rotating frame. A T-shaped rod is fixedly connected to the end of the rotating block away from the curved rod, and the T-shaped rod is slidably connected in the T-shaped groove.

[0012] Preferably, the position where the threaded hole is located is perpendicular to the plane of the cross plate.

[0013] In summary, the technical effects and advantages of the present utility model are as follows:

[0014] By arranging a servo motor, a rotating shaft, a vertical rod, a curved rod, a rotating frame and a filter screen on the side wall of the treatment tank, the problem that the floating slag pushed to the side wall of the treatment tank by the slag scraper in the prior art needs to be manually removed by workers is solved. At the same time, the curved rod used to drive the rotation of the rotating frame can also move horizontally on the rotating frame, thereby facilitating the workers to clean the floating slag on the surface of the filter screen. When cleaning the filter screen, the rotating frame can be rotated to the horizontal state in advance, so that the workers can clean more safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structural connection between the servo motor and the rotating shaft in the present utility model;

[0017] Figure 3 is Figure 2 a partial enlarged view of part A in

[0018] Figure 4 is a schematic diagram of the structure of the rotating block and the rotating frame in the present utility model.

[0019] In the figure: 1, treatment tank; 2, slag scraper; 3, outer shell; 4, servo motor; 5, rotating shaft; 6, first collar; 7, vertical rod; 8, curved rod; 9, rotating block; 10, rotating frame; 11, filter screen; 12, cross plate; 13, cross groove; 14, second collar; 15, connecting rod; 16, third collar; 17, moving rod; 18, threaded rod; 19, threaded hole; 20, handle; 21, T-shaped groove; 22, T-shaped rod. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] As Figure 1 - Figure 4 shown, a multi-stage air flotation tank for wastewater treatment includes a plurality of treatment tanks 1 and a plurality of slag scrapers 2. An outer shell 3 is commonly provided outside the plurality of treatment tanks 1. Each slag scraper 2 is respectively located in the corresponding treatment tank 1. The slag scraper 2 is a common device in the air flotation tank, so its working principle will not be described here. A servo motor 4 is installed on the side wall of the outer shell 3. The output end of the servo motor 4 is fixedly connected to a rotating shaft 5. A plurality of first collars 6 are sleeved on the outer wall of the rotating shaft 5. A cross plate 12 is fixedly connected to the outside of the rotating shaft 5. A cross groove 13 is opened on the inner wall of the first collar 6. The cross plate 12 is slidably connected to the inner wall of the cross groove 13. The cooperation between the cross plate 12 and the cross groove 13 enables the rotation of the rotating shaft 5 to drive the first collar 6 to rotate together.

[0022] The position of each first collar 6 corresponds to the position of a treatment tank 1. A vertical rod 7 is fixedly connected to the outer wall of the first collar 6. The other end of the vertical rod 7 is fixedly connected to a curved rod 8. The curved rod 8 is arc-shaped. A second collar 14 is sleeved on the outside of the vertical rod 7. A connecting rod 15 is fixedly connected to the side wall of the second collar 14. The other end of the connecting rod 15 is fixedly connected to a third collar 16. A moving rod 17 is movably sleeved in the third collar 16. A handle 20 is fixedly connected to the top of the moving rod 17. The outer diameter of the handle 20 is greater than the outer diameter of the moving rod 17. Anti-slip patterns can also be provided at the edge position of the handle 20, so as to facilitate the staff to rotate the handle. A threaded rod 18 is fixedly connected to the bottom wall of the moving rod 17. A plurality of threaded holes 19 are opened on the side wall of the rotating shaft 5. The threaded rod 18 is threadedly connected to the threaded hole 19. The position where the threaded hole 19 is located is perpendicular to the plane of the cross plate 12. When the threaded rod 18 is inserted into the threaded hole 19, the position of the vertical rod 7 and the first collar 6 can be fixed at the current position.

[0023] At the other end of the curved rod 8, a rotating block 9 is installed. The inner wall of the treatment tank 1 is rotatably connected with a rotating frame 10. A T-shaped groove 21 is formed in the side wall of the rotating frame 10. One end of the rotating block 9 away from the curved rod 8 is fixedly connected with a T-shaped rod 22. The T-shaped rod 22 is slidably connected in the T-shaped groove 21. A filter screen 11 is installed on the inner wall of the rotating frame 10. The position of the rotating frame 10 is approximately the same as the size of the side wall of the treatment tank 1, and the size of the filter screen 11 is also close to the size of the side wall of the treatment tank 1. Therefore, as much scum as possible can be intercepted. The rotating block 9 is slidably connected with the side wall of the end of the rotating frame 10 away from the inner wall of the treatment tank 1.

[0024] The working principle is as follows: Before the slag scraping machine 2 pushes and drives the scum inside the treatment tank 1, in order to prevent the scum from sticking to the inner wall of the treatment tank 1, the servo motor 4 is started, so that the servo motor 4 drives the rotating shaft 5 to rotate. Under the action of the cross plate 12, the first collar 6 sleeved on the rotating shaft 5 will drive the vertical rod 7 to rotate together. Furthermore, the curved rod 8 fixedly connected with the vertical rod 7 drives the rotating frame 10 to rotate, so that the filter screen 11 and the rotating frame 10 rotate to the vertical state. When the slag scraping machine 2 pushes and drives the scum, the scum will be washed onto the filter screen 11, effectively preventing the scum from sticking to the side wall of the treatment tank 1.

[0025] When there is a large amount of scum accumulated on the filter screen 11, the servo motor 4 is started to rotate the rotating frame 10 and the filter screen 11 to the horizontal state. Then the staff rotates the turning handle, so that the moving rod 17 drives the threaded rod 18 out of the threaded groove. Then the second collar 14 is pushed upward. At this time, the first collar 6 can move along the rotating shaft 5. Furthermore, the curved rod 8 drives the rotating block 9 and the T-shaped rod 22 to slide in the T-shaped groove 21. The curved rod 8 moves to the edge position of the rotating frame 10, which is convenient for the staff to clean the surface of the filter screen 11.

[0026] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A wastewater treatment multi-stage flotation tank, comprising a plurality of treatment tanks (1) and a plurality of scrapers (2), wherein a shell (3) is commonly provided outside the plurality of treatment tanks (1), and each scraper (2) is respectively located in a corresponding treatment tank (1), characterized in that: A servo motor (4) is mounted on the side wall of the housing (3); the output end of the servo motor (4) is fixedly connected to a rotating shaft (5); the outer wall of the rotating shaft (5) is sleeved with a plurality of first rings (6); the position of each first ring (6) corresponds to the position of a treatment tank (1); the outer wall of the first ring (6) is fixedly connected to a vertical rod (7); the other end of the vertical rod (7) is fixedly connected to a curved rod (8); the other end of the curved rod (8) is mounted with a rotating block (9); the inner wall of the treatment tank (1) is rotatably connected to a rotating frame (10); the inner wall of the rotating frame (10) is mounted with a filter screen (11); the rotating block (9) is slidably connected to the side wall of the rotating frame (10) at one end away from the inner wall of the treatment tank (1).

2. A wastewater treatment multi-stage flotation tank according to claim 1, characterized in that: A transverse plate (12) is fixedly connected to the outside of the rotating shaft (5), a transverse groove (13) is provided on the inner wall of the first sleeve ring (6), and the transverse plate (12) is slidably connected to the inner wall of the transverse groove (13).

3. A wastewater treatment multi-stage flotation tank according to claim 2, characterized in that: The outer sleeve of the vertical rod (7) is provided with a second sleeve (14), the side wall of the second sleeve (14) is fixedly connected with a connecting rod (15), the other end of the connecting rod (15) is fixedly connected with a third sleeve (16), a moving rod (17) is movably sleeved in the third sleeve (16), the bottom wall of the moving rod (17) is fixedly connected with a threaded rod (18), the side wall of the rotating shaft (5) is provided with a plurality of threaded holes (19), and the threaded rod (18) is threadedly connected with the threaded holes (19).

4. A wastewater treatment multi-stage flotation tank according to claim 3, characterized in that: A handle (20) is fixedly connected to the top of the movement rod (17), and the outer diameter of the handle (20) is greater than the outer diameter of the movement rod (17).

5. A wastewater treatment multi-stage flotation tank according to claim 1, characterized in that: The side wall of the rotating frame (10) is provided with a T-shaped slot (21); one end of the rotating block (9) away from the curved rod (8) is fixedly connected with a T-shaped rod (22); and the T-shaped rod (22) is slidably connected in the T-shaped slot (21).

6. A wastewater treatment multi-stage flotation tank according to claim 3, characterized in that: The threaded hole (19) is located perpendicular to the plane of the horizontal plate (12).

Images