A pulse aeration device for preventing sludge accumulation in the flocculation zone of a high sedimentation tank.

Abstract

This application discloses a pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-efficiency sedimentation tank, belonging to the field of wastewater treatment technology. It includes a high-efficiency sedimentation tank, with a mixing zone, a flocculation zone, and a sedimentation zone arranged sequentially from left to right inside the tank. This application utilizes the coordination of an aeration device, an air distribution pipe, a pulse control valve, and a perforated aeration pipe to periodically aerate the flocculation zone. The pulse control valve periodically opens and closes, generating pulsating bubbles from the aeration holes of the perforated aeration pipe. The rising bubbles drive the surrounding water flow, forming local turbulence, enhancing the mixing effect and slowing sludge settling. Furthermore, the intermittent release of the pulsed airflow avoids the damage to the flocs caused by continuous aeration. A drive unit drives a threaded rod to rotate, causing a moving plate to move along the movable groove, adjusting the position of the stirring blades. Driven by a stirring motor, the threaded rod drives the stirring blades to rotate, forming a complementary mixing mode with the pulse aeration, further improving the flocculation effect.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a pulse aeration device for preventing sludge accumulation in the flocculation zone of a high sedimentation tank. Background Technology

[0002] High-efficiency sedimentation tanks are important equipment in wastewater treatment, mainly composed of mechanical mixing tanks, mechanical reaction tanks, and inclined tube sedimentation tanks, including mixing zones, flocculation zones, and sedimentation zones. The function of the flocculation zone is to thoroughly mix sludge and wastewater through slow stirring, forming larger flocs to facilitate subsequent sedimentation.

[0003] Because the stirring rate in the flocculation zone is relatively slow, sludge tends to settle at the bottom, leading to a decrease in flocculation effect, a shortening of the effective retention time of wastewater, and consequently affecting the overall treatment efficiency. Therefore, an improvement has been made to a pulse aeration device to prevent sludge accumulation in the flocculation zone of a high sedimentation tank. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a pulse aeration device to prevent sludge accumulation in the flocculation zone of a high sedimentation tank. This device overcomes the deficiencies of existing technologies and aims to solve the problems of slow stirring rate in the existing flocculation zone, which leads to sludge settling at the bottom, resulting in decreased flocculation effect, shortened effective wastewater retention time, and consequently affecting overall treatment efficiency.

[0005] To achieve the above objectives, this application provides the following technical solution: a pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-efficiency sedimentation tank, comprising a high-efficiency sedimentation tank, wherein a mixing zone, a flocculation zone, and a sedimentation zone are arranged sequentially from left to right inside the high-efficiency sedimentation tank; an inlet pipe and an outlet pipe are fixedly connected to the outer walls of the left and right sides of the high-efficiency sedimentation tank; an aeration device is placed on the outer side of the high-efficiency sedimentation tank; perforated aeration pipes are provided at the four corners of the bottom of the flocculation zone, and aeration holes are opened at the bottom of the perforated aeration pipes; the aeration device is connected to the perforated aeration pipes through an air distribution pipe, and a pulse control valve is installed on the air distribution pipe; a positioning frame is fixedly installed on the top of the high-efficiency sedimentation tank directly above the flocculation zone; a movable groove is opened inside the positioning frame; a threaded rod is rotatably connected inside the movable groove; a drive unit for driving the threaded rod to rotate is fixedly installed on the side wall of the positioning frame; a movable plate is threadedly sleeved on the outer surface of the threaded rod; a stirring motor is fixedly installed on the upper surface of the movable plate; and a stirring fan blade is fixedly connected to the output end of the stirring motor through a stirring rod.

[0006] By adopting the above technical solution, the aeration device, air distribution pipe, pulse control valve, and perforated aeration pipe work together to periodically aerate the flocculation zone. The pulse control valve opens and closes periodically, generating pulsating bubbles from the aeration holes of the perforated aeration pipe. The rising bubbles drive the surrounding water flow, forming local turbulence, which enhances the mixing effect and slows down sludge settling. The intermittent release of the pulsed airflow avoids the damage to the flocs caused by continuous aeration. The drive unit drives the threaded rod to rotate, causing the moving plate to move along the movable groove and adjust the position of the stirring blades. The threaded rod drives the stirring blades to rotate under the drive of the stirring motor, forming a complementary mixing mode with the pulse aeration, further improving the flocculation effect.

[0007] As a preferred technical solution of this application, a microbial culture dish is fixedly installed at the bottom of the flocculation zone, and flocculant-producing bacteria are arranged inside the microbial culture dish.

[0008] By adopting the above technical solution, the microbial community in the microbial culture dish can secrete extracellular polymers to enhance the structural strength of sludge flocs and increase the settling speed.

[0009] As a preferred technical solution of this application, the drive unit includes a fixed base fixedly installed on the outer wall of the high-efficiency sedimentation tank, a drive motor fixedly installed on the top of the fixed base, one end of the threaded rod fixedly connected to the output end of the drive motor, and a support block fixedly connected to the bottom of the fixed base.

[0010] By adopting the above technical solution, the drive motor is limited and fixed by the fixed seat, which prevents the drive motor from shaking during operation and ensures the working stability of the drive motor. The support block plays a role in reinforcement and support.

[0011] As a preferred technical solution of this application, the number of the stirring motor, stirring rod and stirring fan blade are all set in pairs and correspond one-to-one, and the two stirring motors, stirring rods and stirring fan blades are symmetrically distributed on both sides of the positioning frame.

[0012] By adopting the above technical solution, the symmetrically distributed stirring blades form a convection shear zone, eliminating flocculation dead zones and enhancing the mixing effect.

[0013] As a preferred embodiment of this application, the top of the movable plate is fitted with the top wall of the movable groove, and the bottom of the movable plate is fitted with the bottom wall of the movable groove.

[0014] By adopting the above technical solution, the upper and lower mating surfaces of the moving plate and the movable groove form a double support, which prevents the moving plate from deflecting during movement and ensures its movement stability.

[0015] As a preferred technical solution of this application, the perforated aeration pipe is designed in the shape of a right-angle bend and is made of stainless steel.

[0016] By adopting the above technical solution, when compressed air passes through the right-angle bend, the air in the higher pressure area is forced to the lower pressure area to compensate for the pressure loss at the end of the perforated aeration pipe and to achieve aeration balance. The perforated aeration pipe, made of stainless steel, has strong corrosion resistance and can work in the flocculation zone for a long time.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, the aeration device, air distribution pipe, pulse control valve, and perforated aeration pipe work together to periodically aerate the flocculation zone. The pulse control valve opens and closes periodically, generating pulsating bubbles from the aeration holes of the perforated aeration pipe. The rising bubbles drive the surrounding water flow, forming local turbulence, which enhances the mixing effect and slows down sludge settling. The intermittent release of the pulsed airflow avoids the damage to the flocs caused by continuous aeration. The drive unit drives the threaded rod to rotate, causing the moving plate to move along the movable groove and adjust the position of the stirring blades. The threaded rod drives the stirring blades to rotate under the drive of the stirring motor, forming a complementary mixing mode with the pulse aeration, further improving the flocculation effect.

[0019] 2. In this invention, the microbial community in the microbial culture dish can secrete extracellular polymers to enhance the structural strength of sludge flocs and increase the settling speed.

[0020] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of this application;

[0023] Figure 2 This is a frontal sectional view of the structure of this application;

[0024] Figure 3 This is a schematic diagram of the aeration device structure of this application;

[0025] Figure 4 This is a partial structural diagram of this application.

[0026] In the diagram: 1. High-efficiency sedimentation tank; 2. Mixing zone; 3. Flocculation zone; 4. Sedimentation zone; 5. Inlet pipe; 6. Outlet pipe; 7. Aeration device; 8. Air distribution pipe; 9. Pulse control valve; 10. Perforated aeration pipe; 11. Aeration hole; 12. Microbial culture dish; 13. Positioning frame; 14. Movable trough; 15. Threaded rod; 16. Moving plate; 17. Drive unit; 171. Drive motor; 172. Fixed base; 173. Support block; 18. Stirring motor; 19. Stirring rod; 20. Stirring fan blade. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] like Figure 1 - Figure 4 As shown in the figure, this embodiment provides a pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-efficiency sedimentation tank. The device includes a high-efficiency sedimentation tank 1. From left to right, the high-efficiency sedimentation tank 1 has a mixing zone 2, a flocculation zone 3, and a sedimentation zone 4 arranged sequentially. Inlet pipes 5 and outlet pipes 6 are fixedly connected to the outer walls of the left and right sides of the high-efficiency sedimentation tank 1. An aeration device 7 is placed on the outer side of the high-efficiency sedimentation tank 1. Perforated aeration pipes 10 are installed at the four corners of the bottom of the flocculation zone 3. Aeration holes 11 are opened at the bottom of the perforated aeration pipes 10. The aeration device 7 is connected to the perforated aeration pipes 10 through an air distribution pipe 8, and a pulse control valve 9 is installed on the air distribution pipe 8. A positioning frame 13 is fixedly installed at the top of the high-efficiency sedimentation tank 1, directly above the flocculation zone 3. A movable groove 14 is opened inside the positioning frame 13, and a threaded rod 15 is rotatably connected inside the movable groove 14. A drive mechanism is fixedly installed on the side wall of the positioning frame 13. The drive unit 17 drives the rotation of the threaded rod 15. A movable plate 16 is threadedly sleeved on the outer surface of the threaded rod 15. A stirring motor 18 is fixedly installed on the upper surface of the movable plate 16. The output end of the stirring motor 18 is fixedly connected to the stirring blade 20 through the stirring rod 19. During use, the pulse control valve 9 opens and closes periodically. The compressed air generated by the aeration device 7 enters the perforated aeration pipe 10 through the air distribution pipe 8, generating pulsating bubbles at the aeration holes 11. The rising of the bubbles drives the surrounding water flow, forming local turbulence, which enhances the mixing effect and slows down sludge settling. The drive unit 17 drives the threaded rod 15 to rotate, causing the movable plate 16 to move along the movable groove 14, adjusting the position of the stirring blade 20. Under the drive of the stirring motor 18, the threaded rod 15 drives the stirring blade 20 to rotate, forming a complementary mixing mode with the pulse aeration, further improving the flocculation effect.

[0029] In this embodiment, as Figure 2As shown, a microbial culture dish 12 is fixedly installed at the bottom of the flocculation zone 3. The microbial culture dish 12 contains flocculant-producing bacteria. When in use, the bacteria in the microbial culture dish 12 can secrete extracellular polymers to enhance the structural strength of the sludge flocs and increase the settling speed.

[0030] In this embodiment, as Figure 2 and 4 As shown, the drive unit 17 includes a fixed base 172 fixedly installed on the outer wall of the high-efficiency sedimentation tank 1. A drive motor 171 is fixedly installed on the top of the fixed base 172. One end of the threaded rod 15 is fixedly connected to the output end of the drive motor 171. A support block 173 is fixedly connected to the bottom of the fixed base 172. In use, the fixed base 172 limits and fixes the drive motor 171 to prevent the drive motor 171 from shaking during operation and to ensure the working stability of the drive motor 171. The support block 173 plays a role in reinforcement and support.

[0031] In this embodiment, as Figure 4 As shown, there are two stirring motors 18, stirring rods 19 and stirring blades 20, and they are arranged in a one-to-one correspondence. The two stirring motors 18, stirring rods 19 and stirring blades 20 are symmetrically distributed on both sides of the positioning frame 13. When in use, the symmetrically distributed stirring blades 20 form a convection shear zone, which eliminates flocculation dead corners and enhances the mixing effect.

[0032] In this embodiment, as Figure 4 As shown, the top of the movable plate 16 is in contact with the top wall of the movable groove 14, and the bottom of the movable plate 16 is in contact with the bottom wall of the movable groove 14. In use, the upper and lower contact surfaces of the movable plate 16 and the movable groove 14 form a double support to prevent the movable plate 16 from deflecting when moving and to ensure its movement stability.

[0033] In this embodiment, as Figure 2 and 3 As shown, the perforated aeration pipe 10 is designed in the shape of a right-angle bend and is made of stainless steel. When compressed air passes through the right-angle bend, the air in the higher pressure area is forced to the lower pressure area to compensate for the pressure loss at the end of the perforated aeration pipe 10 and to achieve aeration balance. The perforated aeration pipe 10, made of stainless steel, has strong corrosion resistance and can work in the flocculation zone 3 for a long time.

[0034] The working principle of this utility model is as follows: When using the pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-efficiency sedimentation tank according to this application, sewage enters the interior of the high-efficiency sedimentation tank 1 through the inlet pipe 5, and sequentially passes through the mixing zone 2, flocculation zone 3, and sedimentation zone 4 for sewage treatment. During operation in the flocculation zone 3, the pulse control valve 9 opens and closes periodically. Compressed air generated by the aeration device 7 enters the perforated aeration pipe 10 through the air distribution pipe 8, generating pulsating bubbles at the aeration holes 11. The rising of these bubbles drives the surrounding water flow, forming local turbulence and enhancing the mixing... The combined effect slows down sludge settling. At the same time, the drive unit 17 drives the threaded rod 15 to rotate, causing the moving plate 16 to move along the movable groove 14, thereby adjusting the position of the stirring fan blade 20. The stirring motor 18 drives the threaded rod 15 to drive the stirring fan blade 20 to rotate, forming a complementary mixing mode with pulse aeration, further improving the flocculation effect. In addition, the microbial community in the microbial culture dish 12 secretes extracellular polymers to enhance the structural strength of the sludge flocs and increase the settling speed. Finally, the treated purified water is discharged through the effluent pipe 6.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-set basin, comprising a high-efficiency sedimentation basin (1), characterized in that, The high-efficiency sedimentation tank (1) is arranged from left to right as a mixing zone (2), a flocculation zone (3), and a sedimentation zone (4). The outer walls of the left and right sides of the high-efficiency sedimentation tank (1) are fixedly connected to an inlet pipe (5) and an outlet pipe (6). An aeration device (7) is placed on the outside of the high-efficiency sedimentation tank (1). Perforated aeration pipes (10) are provided at the four corners of the bottom of the flocculation zone (3). Aeration holes (11) are opened at the bottom of the perforated aeration pipes (10). The aeration device (7) is connected to the perforated aeration pipes (10) through an air distribution pipe (8), and a pulse control valve (9) is installed on the air distribution pipe (8). The high-efficiency sedimentation tank (1) is fixedly installed with a positioning frame (13) directly above the flocculation zone (3). The positioning frame (13) has an internal movable groove (14). The movable groove (14) is rotatably connected with a threaded rod (15). The side wall of the positioning frame (13) is fixedly installed with a drive unit (17) for driving the threaded rod (15) to rotate. The outer surface of the threaded rod (15) is threaded with a movable plate (16). The upper surface of the movable plate (16) is fixedly installed with a stirring motor (18). The output end of the stirring motor (18) is fixedly connected with a stirring fan blade (20) through a stirring rod (19).

2. The pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-set lagoon according to claim 1, characterized in that, A microbial culture dish (12) is fixedly installed at the bottom of the flocculation zone (3), and flocculant-producing bacteria are arranged inside the microbial culture dish (12).

3. The pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-set lagoon according to claim 1, characterized in that, The drive unit (17) includes a fixed seat (172) fixedly installed on the outer wall of the high-efficiency sedimentation tank (1). A drive motor (171) is fixedly installed on the top of the fixed seat (172). One end of the threaded rod (15) is fixedly connected to the output end of the drive motor (171). A support block (173) is fixedly connected to the bottom of the fixed seat (172).

4. The pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-set lagoon according to claim 1, characterized in that, The number of each stirring motor (18), stirring rod (19) and stirring blade (20) is two and they correspond one to one. The two stirring motors (18), stirring rods (19) and stirring blades (20) are symmetrically distributed on both sides of the positioning frame (13).

5. The pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-pressure sedimentation tank according to claim 1, characterized in that, The top of the movable plate (16) is in contact with the top wall of the movable groove (14), and the bottom of the movable plate (16) is in contact with the bottom wall of the movable groove (14).

6. The pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-set lagoon according to claim 1, wherein The perforated aeration pipe (10) is designed in the shape of a right-angle bend and is made of stainless steel.

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