Combined stirring device for sewage treatment

Abstract

The utility model discloses a combined stirring device for sewage treatment. The combined stirring device comprises an assembling bracket, a driving motor, a stirring rotating shaft and an air supply device, the driving motor is in transmission connection with the stirring rotating shaft, and the stirring rotating shaft is connected with the stirring assembly, provided with the aeration assembly and connected with the air supply device. And the bottom end of the rotating shaft is connected with the base. The stirring assembly comprises a first transverse connecting part, a second transverse connecting part and a vertical stirring rod, and an aeration pipe of the aeration assembly is arranged on the second vertical stirring rod and is connected with an air supply disc and an air supply device through an air supply connecting hose and a rotary air supply structure. The second transverse connecting part is provided with a telescopic rod piece and a driving structure. And a guide plate is arranged at the bottom end of the rotating shaft. The device adopts the combination of fixed and adjustable movable stirring structures and the ingenious arrangement of the aeration pipe, realizes the synchronization of stirring and aeration, overcomes the problems of stirring dead angles, low efficiency, poor aeration and the like of the existing stirring device, improves the efficiency and quality of oxygen transfer and sewage treatment of the aerobic reaction tank, and has remarkable technical and application values.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a combined stirring device for wastewater treatment. Background Technology

[0002] In existing technologies, the mixing devices used in reaction tank-type wastewater treatment devices are simple paddle-type or frame-type mixing devices. These devices are too simplistic and have several shortcomings in practical applications. For example, while paddle-type mixing devices are simple in structure, they are usually small in size. Multiple sets of mixing blades are needed within large tank structures, and dead zones can easily form during mixing, resulting in some wastewater not being fully mixed and affecting treatment efficiency. Frame-type mixing devices, while having a larger mixing area, have relatively low mixing efficiency and poor performance, easily leading to uneven wastewater composition within the tank structure. Furthermore, for some reaction tank-type wastewater treatment equipment requiring aeration, current mixing systems cannot effectively coordinate mixing and aeration during the aeration stage. This results in poor bubble paths from the aeration heads, affecting oxygen transfer efficiency and failing to meet the requirements of modern wastewater treatment processes, further impacting the efficiency and quality of wastewater treatment. Summary of the Invention

[0003] The technical problem solved by this utility model is to provide a combined stirring device for sewage treatment, which is suitable for assembly in a circular sewage treatment tank, so as to solve the defects in the above-mentioned technical background.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a combined stirring device for sewage treatment, including an assembly bracket mounted on the top of the tank cavity, a drive motor fixed on the assembly bracket, a stirring shaft arranged vertically and rotatably in the tank cavity, and an air supply device fixed on the assembly bracket. The drive motor is connected to the stirring shaft, a stirring component is connected to the stirring shaft, an aeration component is provided on the stirring component, and the aeration component is connected to the air supply device.

[0005] Preferably, a coupling is connected to the mounting bracket, the output shaft of the drive motor is coaxially and fixedly connected to the top end of the stirring shaft through the coupling, and a base is rotatably connected to the bottom end of the stirring shaft, the base being fixed to the inner bottom of the pool cavity.

[0006] Preferably, the stirring assembly includes a first transverse connecting part and a second transverse connecting part fixed on the stirring shaft. The movable ends of the first transverse connecting part and the second transverse connecting part are respectively vertically fixedly connected to a first vertical stirring rod and a second vertical stirring rod. The aeration assembly is mounted on the second vertical stirring rod, and the second vertical stirring rod is located inside the first vertical stirring rod.

[0007] Preferably, the aeration assembly includes an aeration pipe that is fixedly connected in parallel to the second vertical stirring rod, an air supply connection hose connected to the top of the aeration pipe, the air supply connection hose being built into the second horizontal connecting part, an air supply plate fixed to the bottom of the mounting bracket, the air supply plate being coaxially sleeved on the top of the stirring shaft, and the air supply plate being connected to the air supply connection hose by rotating the air supply structure.

[0008] Preferably, the rotating air supply structure includes an annular air cavity disposed within the annular air supply plate. The annular air cavity is connected to the air supply device via an air pipe. An annular groove is coaxially disposed at the bottom end of the air supply plate. An air receiving plate is coaxially rotatably disposed on the annular groove. A rotating air pipe is connected to the bottom end of the air receiving plate. The rotating air pipe is fixedly connected to the air supply connecting hose. The bottom wall of the air receiving plate is in contact with the inner bottom wall of the air supply plate, and the air receiving plate completely covers the annular groove.

[0009] Preferably, the annular groove is in the form of an inverted trapezoidal structure, and the inner and outer sides of the air receiving plate are respectively attached to the two inner sidewalls of the annular groove.

[0010] Preferably, a support bearing is installed inside the air supply plate, the air receiving plate is rotatably connected to the support bearing, and the air receiving plate covers the support bearing.

[0011] Preferably, the second transverse connecting part includes a telescopic rod, the cylindrical end of which is fixedly connected to the first transverse connecting part. A rack is provided at the bottom of the rod end of the telescopic rod, and a driving structure is connected to the movable end of the cylindrical end. A gear is connected to the driving structure, and the gear meshes with the rack.

[0012] Preferably, a fixing buckle is provided between the aeration pipe and the second vertical stirring rod, and the fixing buckle is equidistantly arranged along the axial direction of the aeration pipe.

[0013] Preferably, a spiral guide plate is installed at the bottom end of the stirring shaft.

[0014] This utility model provides a combined stirring device for sewage treatment, which has the following beneficial effects.

[0015] By adopting a combination design of fixed and adjustable moving stirring structures and cleverly setting up aeration pipes, the mixing and aeration are synchronized, effectively overcoming the problems of dead zones, low mixing efficiency, and poor aeration effect in existing mixing devices. This improves the oxygen transfer efficiency in the aerobic reaction tank as well as the treatment efficiency and quality of wastewater, demonstrating significant technical effects and application value. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1This is a structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 2 This is an enlarged view of the second vertical stirring rod in an embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the air supply plate in an embodiment of the present utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the air supply plate in an embodiment of this utility model.

[0021] The components include: 1. Concrete pool wall; 2. Assembly bracket; 3. Pool cavity; 4. Air supply connection hose; 5. Second transverse connection part; 6. Drive motor; 7. Coupling; 8. Stirring shaft; 9. Second vertical stirring rod; 10. First vertical stirring rod; 11. Aeration pipe; 12. First transverse connection part; 13. Guide plate; 14. Fixing buckle; 15. Air supply device; 16. Air supply plate; 17. Rotating air pipe; 18. Air receiving plate; 19. Support bearing. Detailed Implementation

[0022] See Figure 1 A preferred embodiment of a combined stirring device for wastewater treatment is provided. In this embodiment, the combined stirring device for wastewater treatment is mounted on an aerobic reaction tank, which serves as a wastewater treatment device, to perform stirring and aeration operations on the aerobic reaction tank. The corresponding aerobic reaction tank is a circular tank formed by constructing concrete tank walls 1.

[0023] In this embodiment, the aerobic reaction tank includes a tank cavity 3 enclosed by a concrete tank wall 1. An assembly bracket 2 with a diameter larger than the inner cavity of the concrete tank wall 1 is mounted on the concrete tank wall 1. An aeration device and a motor bracket are mounted on the assembly bracket 2. At the same time, the assembly bracket 2 is set as a passageway bracket, which allows personnel to pass through to perform daily inspection, maintenance and component replacement of the aeration device mounted on the assembly bracket 2 and the drive motor 6 on the motor bracket.

[0024] In this embodiment, the motor bracket is correspondingly set on the assembly bracket 2 at the circular position corresponding to the pool cavity 3, and the drive motor 6 mounted on the motor bracket is a variable frequency motor. The stirring speed of the stirring component can be changed by adjusting the speed of the motor to adapt to different sewage treatment process requirements and improve the flexibility and controllability of the stirring device.

[0025] The mounting bracket 2 is connected to the stirring shaft 8 via a coupling 7 on the lower back side of the corresponding motor bracket. The stirring shaft 8 is vertically set and extends into the tank cavity 3, and a stirring component is mounted on the part of the stirring shaft 8 that extends into the tank cavity 3.

[0026] The mixing assembly includes a first mixing component located on the mixing shaft 8 and a second mixing component located inside the first mixing component. The first mixing component includes two first horizontal connecting parts 12 and a first vertical mixing rod 10. The first horizontal connecting parts 12 are rigid metal rods of a fixed length. The two first horizontal connecting parts 12 are connected to the mixing shaft 8 and the first vertical mixing rod 10 at their upper and lower ends, respectively. The first vertical mixing rod 10 of the entire first mixing assembly maintains a certain gap between its outer side and the side wall of the pool cavity 3, so that the outer contour of the frame mixer of the first mixing assembly maintains a gap of 1 / 10 to 1 / 15 of the pool radius between itself and the concrete pool wall 1 during the mixing operation, ensuring the mixing effect while avoiding collision with the side wall of the pool cavity 3.

[0027] The second mixing assembly includes two frame-type mixers. The two frame-type mixers have the same structure, each including two sets of second horizontal connecting parts 5 and second vertical mixing rods 9. In this embodiment, the second horizontal connecting part 5 is a telescopic frame structure, and its telescopic adjustment range is 1 / 3 to 2 / 3 of the tank radius. Through telescopic adjustment, it can adapt to sewage treatment device tanks of different sizes, thereby improving the versatility and adaptability of the mixing device.

[0028] Two sets of second transverse connecting parts 5 are assembled with the stirring shaft 8 at the upper and lower positions of the second vertical stirring rod 9, respectively. The assembly position is located between the two first transverse connecting parts 12. Through the setting of the telescopic rod of the second transverse connecting part 5, the second vertical stirring rod 9 can realize the telescopic adjustment function of the radial length corresponding to the tank body 3 to adapt to the needs of different stirring operations, thereby further improving the flexibility and adaptability of the stirring device. The cylindrical end of the second transverse connecting part 5 is fixed on the stirring shaft 8, and the rod end is connected to the second vertical stirring rod 9. A DC motor and power supply are installed at the cylindrical end. A gear is connected to the DC motor. The gear meshes with the rack at the bottom of the rod end. The DC motor controls the rotation of the gear to adjust the length of the second transverse connecting part 5. After confirming the length, the DC motor is de-energized, and the rotating shaft is locked by the electromagnetic brake on the DC motor when the power is off. After the telescopic adjustment, the outer contour of the second vertical stirring rod 9 in the second stirring assembly can be closer to or further away from the center position of the tank 3 to achieve effective stirring of sewage in different areas, reduce stirring dead corners, and improve stirring uniformity.

[0029] The air supply plate 16 is connected to the bottom of the assembly bracket 2 via a top-mounted suspension. The air supply plate 16 has a ring-shaped structure with an internal ring-shaped air chamber. An air supply device 15 is connected to one end of the air supply plate 16 via a fixed pipe, and the air supply device 15 is fixedly mounted on the assembly bracket 2. An annular groove is formed at the bottom of the air supply plate 16, coaxially aligned with the plate. A receiving plate 18 is rotatably mounted coaxially within the groove, completely covering the groove. The receiving plate 18, when in contact with the inner bottom wall of the air supply plate 16, minimizes gas leakage. To ensure the stability of the receiving plate 18's rotation, a support bearing 19 is installed inside the air supply plate 16, allowing for rotational mounting. A rotating air pipe 17 is connected to the bottom of the receiving plate 18. This rotating air pipe 17 can be pulled by the air supply connection hose 4, ensuring smooth air supply. The inner side of the receiving plate 18 covers the top of the supporting bearing 19, ensuring the overall sealing of the air supply plate 16.

[0030] In this embodiment, an aeration pipe 11 is also provided on the second vertical stirring rod 9 of the second stirring assembly. Aeration holes are evenly distributed along the length of the second vertical stirring rod 9 of the aeration pipe 11 to achieve uniform aeration along the length of the stirrer. The aeration pipe 11 is routed inside the second transverse connecting part 5 via an air supply connecting hose 4. The outer end of the pipe is connected to an air supply plate 16 mounted at the bottom of the assembly bracket 2. The aeration gas provided by the air supply device 15 is delivered to the aeration pipe 11 through the air supply plate 16. The aeration holes on the aeration pipe 11 are evenly released into the wastewater, increasing the oxygen content in the wastewater, promoting the growth and activity of aerobic microorganisms, and thus improving the biological treatment efficiency of the wastewater. In this embodiment, the aeration pipe 11 is a detachable assembly structure on the second vertical stirring rod 9 of the second stirring assembly. It is secured by multiple sets of fixing buckles 14 formed on the second vertical stirring rod 9. This detachable assembly method allows the aeration pipe 11 to be replaced, maintained, and adjusted according to actual needs, making it convenient and flexible.

[0031] In this embodiment, the single frame mixer constituting the first mixing assembly and the two frame mixers constituting the second mixing assembly are staggered at equal angles on the horizontal projection plane enclosed by the concrete tank wall 1, that is, the two adjacent frame mixers maintain an included angle of 120 degrees to improve the uniformity of mixing.

[0032] In addition, in this embodiment, a guide plate 13 is provided on the portion of the stirring shaft 8 that extends into the tank cavity 3. The guide plate 13 has a spiral structure, is fixedly mounted on the stirring shaft, and is located below the stirring assembly. The guide plate 13 can guide the water flow in the tank cavity 3 to flow in the direction of rotation of the stirring shaft 8, further improving the stirring effect.

[0033] In this embodiment, during operation of the combined stirring device for wastewater treatment, the rotation of the drive motor 6 drives the stirring shaft 8 to rotate, thereby causing the stirring components to perform stirring operations. Simultaneously, the aeration pipe 11 introduces gas to perform aeration operations, achieving synchronous stirring and aeration. During this process, the stirring action helps prevent sedimentation and stratification, ensuring uniform mixing of substances in the wastewater tank and preventing suspended matter from settling at the bottom. Furthermore, the eddies generated by the stirring effectively improve the path of air bubbles released from the aeration heads, enhancing oxygen transfer efficiency and increasing the water depth for oxygen transfer. In addition, during aerobic biological treatment, microorganisms rely on oxygen to decompose organic matter; the stirring action, combined with the improved oxygen transfer efficiency, enhances the activity of these microorganisms, accelerating the decomposition rate of organic matter.

[0034] Based on this, this embodiment adopts a combination design of fixed stirring structure and adjustable movable stirring structure, as well as a clever setting of aeration pipe, which can effectively overcome the problems of stirring dead zone, low stirring efficiency and poor aeration effect in the existing stirring device, and improve the oxygen transfer efficiency in the aerobic reaction tank as well as the treatment efficiency and quality of sewage.

Claims

1. A combined agitator for sewage treatment, characterized by: It includes an assembly bracket (2) mounted on the top of the pool cavity (3), a drive motor (6) fixed on the assembly bracket (2), a stirring shaft (8) arranged vertically in the pool cavity (3), and an air supply device (15) fixed on the assembly bracket (2). The drive motor (6) is connected to the stirring shaft (8) for transmission. A stirring component is connected to the stirring shaft (8). An aeration component is provided on the stirring component. The aeration component is connected to the air supply device (15).

2. The combined sewage treatment agitator according to claim 1, wherein: The mounting bracket (2) is connected to a coupling (7), and the output shaft of the drive motor (6) is coaxially and fixedly connected to the top end of the stirring shaft (8) through the coupling. The bottom end of the stirring shaft (8) is rotatably connected to a base, and the base is fixed to the bottom of the pool cavity (3).

3. The combined sewage treatment agitator as claimed in claim 1, wherein: The stirring assembly includes a first transverse connecting part (12) and a second transverse connecting part (5) fixed on the stirring shaft (8). The movable ends of the first transverse connecting part (12) and the second transverse connecting part (5) are respectively vertically fixedly connected to a first vertical stirring rod (10) and a second vertical stirring rod (9). The aeration assembly is mounted on the second vertical stirring rod (9), and the second vertical stirring rod (9) is located inside the first vertical stirring rod (10).

4. The combined sewage treatment agitator according to claim 3, wherein: The aeration assembly includes an aeration pipe (11) that is fixedly connected in parallel to the second vertical stirring rod (9). The top end of the aeration pipe (11) is connected to an air supply connection hose (4). The air supply connection hose (4) is built into the second horizontal connection part (5). The bottom of the mounting bracket (2) is fixed with an air supply plate (16). The air supply plate (16) is coaxially sleeved on the top end of the stirring shaft (8). The air supply plate (16) is connected to the air supply connection hose (4) by rotating the air supply structure.

5. The combined sewage treatment agitator as claimed in claim 4, wherein: The rotating air supply structure includes an annular air cavity set in the annular air supply plate (16). The annular air cavity is connected to the air supply device (15) through an air pipe. The bottom end of the air supply plate (16) is coaxially provided with an annular slot. An air receiving plate (18) is coaxially rotatably arranged on the annular slot. The bottom end of the air receiving plate (18) is connected to a rotating air pipe (17). The rotating air pipe (17) is fixedly connected to the air supply connection hose (4). The bottom wall of the air receiving plate (18) is in contact with the inner bottom wall of the air supply plate (16), and the air receiving plate (18) completely covers the annular slot.

6. The combined sewage treatment agitator as claimed in claim 5, wherein: The annular slot is in the shape of an inverted trapezoid, and the inner and outer sides of the air receiving plate (18) are respectively attached to the two inner sidewalls of the annular slot.

7. The combined sewage treatment agitator as claimed in claim 6, wherein: The air supply plate (16) is equipped with a support bearing (19), and the air receiving plate (18) is rotatably connected to the support bearing (19), and the air receiving plate (18) covers the support bearing (19).

8. The combined sewage treatment agitator as claimed in claim 3, wherein: The second transverse connecting part (5) includes a telescopic rod. The cylindrical end of the telescopic rod is fixedly connected to the first transverse connecting part (12). A rack is provided at the bottom of the rod end of the telescopic rod. A drive structure is connected to the movable end of the cylindrical end. A gear is connected to the drive structure. The gear meshes with the rack.

9. The combined sewage treatment agitator as claimed in claim 4, wherein: The aeration pipe (11) is connected with a second vertical stirring rod (9) through a fixed buckle (14), and the fixed buckle (14) is equidistantly arranged along the axial direction of the aeration pipe (11).

10. The combined sewage treatment agitator as claimed in claim 1, wherein: The bottom end of the stirring rotating shaft (8) is provided with a spiral flow guide plate (13).

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