A sedimentation tank with anti-blocking function

Abstract

The utility model relates to sewage treatment technical field, concretely is a kind of sedimentation tank with anti-blocking function, it includes pool body and central tube, the position of central tube near bottom is equipped with aeration unit, the aeration unit includes aeration assembly and aeration pipe, aeration pipe is arranged between aeration assembly and central tube, and the aeration gas stream released when aeration assembly periodic operation enters central tube to carry out water flow disturbance by aeration pipe;That is, the disturbance water flow formed by aeration gas stream in central tube solves the problem of central tube blockage, without manual cleaning, without setting complex filter device, in addition, the aeration unit of the scheme only as auxiliary flushing unit periodic operation, therefore, the influence to the sedimentation environment of sedimentation tank is less;Visible, the sedimentation tank of the structure of the scheme has the advantages such as high operating efficiency and long service life, and maintenance cost is also reduced and operation process is simplified, has wide application prospect and economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a sedimentation tank with anti-clogging function. Background Technology

[0002] A sedimentation tank with anti-clogging function is a new type of wastewater treatment equipment. It is usually equipped with baffles to divide the tank into a primary sedimentation zone and a secondary sedimentation zone. The primary sedimentation zone is mainly used for the initial separation of larger sludge particles, while the secondary sedimentation zone further separates smaller particles and suspended solids. This design not only improves the separation efficiency of sludge and water, but also reduces operating costs and environmental impact, providing an efficient and reliable solution for aerobic granular sludge treatment systems.

[0003] However, in actual operation, the flow velocity in the central pipe of the sedimentation tank with anti-clogging function is relatively low (the outdoor drainage design standard GB50014-2021 stipulates that the flow velocity in the central pipe of the vertical flow sedimentation tank should not exceed 30 mm / s). Sludge, especially granular sludge and heavy sludge with good settling performance, is prone to deposit in the central pipe, causing blockage. This not only leads to poor water intake and increased hydraulic loss, but may also cause overflow of the main reactor, seriously affecting the treatment efficiency and service life of the sedimentation tank with anti-clogging function. Traditional solutions, such as regular manual cleaning and setting up complex filtration devices, often have problems such as low efficiency, high maintenance costs and inconvenience in operation.

[0004] Therefore, in order to solve the above problems, this application designs a sedimentation tank with anti-clogging function. Utility Model Content

[0005] The purpose of this invention is to provide a sedimentation tank with anti-clogging function. This sedimentation tank uses air bubbles generated by aeration to form a turbulent water flow in the central pipe, thereby preventing sludge from depositing in the central pipe, especially granular sludge and heavy sludge with high settling properties. This improves the operating efficiency and service life of the sedimentation tank and solves the existing shortcomings.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sedimentation tank with anti-clogging function includes a tank body and a central pipe located in the tank body. An aeration unit is provided near the bottom of the central pipe. The aeration unit includes an aeration component and an aeration pipe. The aeration pipe is disposed between the aeration component and the central pipe, and its two ends are respectively connected to the aeration component and the central pipe. The aeration airflow released by the aeration component during periodic operation enters the central pipe through the aeration pipe and forms a turbulent water flow in the central pipe.

[0008] As a preferred embodiment of this application, the aeration pipe includes only an air supply branch pipe, or the aeration pipe includes a ring main pipe and an air supply branch pipe.

[0009] When only the gas supply branch pipe is included, the gas supply branch pipe connects the aeration assembly to the central pipe;

[0010] When the system includes a ring-shaped main pipe and gas supply branch pipes, the ring-shaped main pipe is fitted onto the central pipe, and the ring-shaped main pipe is provided with multiple sets of connecting pipes that communicate with the central pipe. The gas supply branch pipes connect the aeration assembly to the ring-shaped main pipe.

[0011] As a preferred embodiment of this application, the connection end between the aeration pipe and the central pipe is arranged at an angle of 40°-50° upward to ensure that the aeration airflow is in the same direction as the water flow in the central pipe.

[0012] As a preferred embodiment of this application, one end of the aeration pipe that is connected to the central pipe extends into the central pipe, and a plurality of microporous aerators are provided at the end of the aeration pipe located in the central pipe. The microporous aerators are disc-type or tubular-type, and the microporous aerators serve as airflow output ends to uniformly release microbubbles into the central pipe.

[0013] As a preferred embodiment of this application, a filter screen is installed at the output end of the aeration pipe to intercept large particulate impurities. The pore size of the filter screen is less than or equal to 3mm, and the material of the filter screen is SS316 stainless steel or nylon.

[0014] As a preferred embodiment of this application, the aeration unit further includes an aeration controller for controlling the aeration components to start automatically and periodically. The aeration controller is a time-delay relay.

[0015] As a preferred embodiment of this application, the time delay relay is a digital relay of model 3RP1.

[0016] As a preferred embodiment of this application, the aeration pipe is made of stainless steel or engineering plastic.

[0017] As a preferred embodiment of this application, the aeration assembly includes an aeration pump and an external air source connected thereto.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This solution features an aeration unit located near the bottom of the central pipe of the anti-clogging sedimentation tank. The air bubbles generated by the aeration unit create a turbulent water flow within the central pipe, preventing the deposition of highly sedimentable granular sludge and heavy sludge, thus avoiding blockage. In other words, this solution uses the turbulent water flow created by the aeration airflow to solve the problem of central pipe blockage, eliminating the need for manual cleaning and complex filtration devices. Furthermore, the aeration unit operates periodically only as an auxiliary flushing unit, minimizing its impact on the sedimentation environment of the sedimentation tank. In summary, this sedimentation tank structure offers advantages such as high operating efficiency and long service life. Moreover, it reduces maintenance costs and simplifies operation, demonstrating broad application prospects and economic benefits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a sedimentation tank with anti-clogging function provided by this utility model.

[0021] Figure 2 A schematic diagram of the overall structure of another sedimentation tank with anti-clogging function provided by this utility model.

[0022] Figure 3 Provided by this utility model Figure 2 A schematic diagram of the cross-sectional structure along the AA direction.

[0023] Figure 4 A schematic diagram of the connection structure between the annular main tube and the central tube provided by this utility model.

[0024] Attached Figure

[0025] 10 is the tank body; 20 is the central pipe; 201 is the water inlet; 202 is the drain outlet; 301 is the air supply branch pipe; 302 is the aeration pump; 303 is the external air source; 304 is the time delay relay; 305 is the ring main pipe; 306 is the microporous aerator; 307 is the filter screen; 308 is the connecting pipe. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0027] This embodiment provides a sedimentation tank with anti-clogging function, comprising a tank body 10 and a central pipe 20 located at the center of the tank body 10. As is known in the art, sewage is guided into the tank body 10 through the central pipe 20, achieving uniform water distribution and stable water flow under the guidance of the central pipe 20. In this embodiment, the inlet 201 of the central pipe is located at the bottom, and the outlet 202 is located at the top. During use, due to the influence of water flow velocity, granular sludge and heavy sludge with good settling performance are prone to deposit near the bottom of the central pipe 20, causing blockage. To address this, this solution incorporates aeration near the bottom of the central pipe 20. The aeration unit includes an aeration component and an aeration pipe. The aeration pipe is disposed between the aeration component and the central pipe 20, and its two ends are respectively connected to the aeration component and the central pipe 20. In this embodiment, the material of the aeration pipe is preferably pressure-resistant and corrosion-resistant stainless steel or engineering plastic. When the aeration component is running periodically, the aeration airflow released enters the central pipe 20 through the aeration pipe to disturb the water flow in the central pipe 20, thereby forming a disturbed water flow. The disturbed water flow washes the pipe wall of the central pipe 20 and disrupts the settling state in the central pipe 20, thereby avoiding the blockage of the central pipe 20 caused by the deposition of sludge particles.

[0028] In this embodiment, the aeration assembly includes an aeration pump 302 and an external air source 303. It can be understood that the external air source 303 can be compressed gas or a positive pressure blower. The aeration pump 302, as an execution unit, can introduce the external air source into the central pipe 20 through the aeration pipe, and then use the aeration airflow to act on the water flow in the central pipe 20, so that the water flow is disturbed to flush the pipe wall and at the same time, it disrupts the settling state in the central pipe 20.

[0029] In this embodiment, the model of the aeration pump and the pressure of the aeration airflow it generates are selected according to actual needs such as water depth, and no specific limitation is made here.

[0030] In this embodiment, optionally, the aeration pipe includes only the gas supply branch pipe 301, or the aeration pipe includes the annular main pipe 305 and the gas supply branch pipe 301.

[0031] When only the air supply branch pipe 301 is included, this air supply branch pipe 301 connects the aeration pump 302 in the aeration assembly to the central pipe 20, such as... Figure 1 As shown, it can be understood that the gas supply branch pipe 301 may include one or more sets, and the specific design can be optimized in combination with the structure of the pool body 10, the size of the central pipe 20 and the water quality characteristics. In this embodiment, it is preferred to include one set; when multiple sets are included, the multiple sets of gas supply branch pipes 301 are connected in parallel and then connected to the aeration pump 302; in this embodiment, the connection method between the gas supply branch pipe 301 and the central pipe 20 can be either flange connection or welding.

[0032] When the system includes a ring main pipe 305 and gas branch pipes 301, the ring main pipe 305 is fitted onto the central pipe 20, and the ring main pipe 305 is provided with multiple sets of connecting pipes 308 that communicate with the central pipe 20, such as... Figure 3 As shown, the air supply branch pipe 301 connects the aeration pump 302 in the aeration assembly to the annular main pipe 305, as follows: Figure 2 As shown, in this scheme, the gas supply branch pipe 301 is connected to the central pipe 20 through the annular main pipe 305. By adding the annular main pipe 305, it is beneficial to expand the number of connecting pipes 308, so that the airflow can enter the central pipe 20 from multiple angles, which can be applied to pools 10 of different sizes. On the other hand, it can simplify the pipeline layout. In this embodiment, the connection method between the connecting pipe 308 and the annular main pipe 305 and the central pipe 20 can be either flange connection or welding.

[0033] In this embodiment, to increase the shear force of the water flow disturbance, the connection end between the aeration pipe and the central pipe 20 is arranged obliquely upward at 40°-50°, preferably 45°, to ensure that the aeration airflow is in the same direction as the water flow in the central pipe 20; in this design structure, for Figure 1 The structure in the middle connects the outlet end of the gas transmission branch pipe 301 to the central pipe 20 at a 45° upward angle; for Figure 2 The structure in the middle features a connecting pipe 308 designed at a 45° upward angle, connected to the central pipe 20. See [reference needed]. Figure 4 As shown, the upward-sloping connection allows the aeration airflow to collide with the water flow in the central pipe 20 and flow upward in the same direction, thereby enhancing the water flow disturbance effect and maximizing the shear force of the disturbed water flow. This improves the interference effect on the sedimentation environment in the central pipe 20, prevents large particles of sludge or heavy sludge from depositing in the central pipe 20, and also prevents the deposited sludge from being pushed back into the central pipe 20.

[0034] In this embodiment, one end of the aeration pipe connected to the central pipe 20 extends into the central pipe 20, and multiple microporous aerators 306 are provided at the end of the aeration pipe located in the central pipe 20. The microporous aerators 306 are disc-type or tubular-type, and in this embodiment, the tubular type is preferred. The tubular microporous aerators 306 are arranged perpendicular to the axis of the central pipe 20. The microporous aerators 306 serve as the airflow output end and uniformly release microbubbles into the central pipe 20, further improving the water flow disturbance effect and preventing sludge deposition. In this embodiment, setting one end of the aeration pipe in the central pipe 20 may increase the inconvenience of maintaining the output end. When necessary and feasible, tubular microporous aerators 306 can also be used, and the tubular microporous aerators 306 are connected in series in the aeration pipe. The end of the aeration pipe (output end) is connected to the central pipe 20 by a flange.

[0035] In this embodiment, the model of the microporous aerator is selected according to the model of the aeration pump to ensure that the microporous aerator can withstand the air pressure output by the aeration pump, that is, the two are compatible to avoid damage to the microporous aerator.

[0036] In this embodiment, a filter screen 307 is installed at the output end of the aeration pipe to intercept large particulate impurities. It can be understood that when a microporous aerator 306 is installed at the output end of the aeration pipe, the microporous aerator 306 will serve as the output end. The end of the aeration pipe is preferably set as a blind end. When the microporous aerator 306 serves as the output end, the filter screen 307 can be wrapped around the outside of the microporous aerator 306. Of course, when the microporous aerator 306 has its own filtration function, it is not necessary to install a filter screen 307. The pore size of the filter screen 307 is less than or equal to 3mm. At the same time, the material of the filter screen 307 is SS316 stainless steel or nylon.

[0037] In this embodiment, the aeration unit also includes an aeration controller 304 for controlling the periodic automatic start of the aeration components. The aeration controller 304 is a time-delay relay. In this embodiment, the time-delay relay is preferably a digital relay of model 3RP1. The start cycle and duration of the aeration pump 302 can be set using this digital relay. For example, the start cycle can be set to 12h or 24h, and the duration can be set to 30-60s. That is, the aeration pump 302 is automatically started every 12h or 24h and aeration continues for 30-60s to achieve periodic cleaning of the sludge in the central pipe 20.

[0038] The specific operating principle of this embodiment includes:

[0039] Before use, complete the installation of aeration components and aeration pipes, and ensure that the aeration pipes are sealed and connected to the central pipe 20.

[0040] In use, the start-up cycle and duration of the aeration pump 302 are preset via a time delay relay. Then, the aeration pump 302 is automatically started at the specified time. After starting, the aeration pump 302 outputs an aeration airflow with a certain pressure, which is input to the central pipe 20 through the aeration pipe. This aeration airflow enters the central pipe 20 against the water flow and forms a turbulent water flow inside the central pipe 20. This turbulent water flow uses shear force to flush the wall of the central pipe 20 on the one hand, and accelerates the water flow disturbance near the bottom of the central pipe 20 on the other hand. This achieves the destruction of the settling environment inside the central pipe 20, thereby avoiding the deposition of particulate matter and solving the clogging problem.

[0041] In other words, this solution uses the turbulent water flow formed by the aeration airflow within the central pipe 20 to solve the problem of blockage in the central pipe 20, eliminating the need for manual cleaning and complex filtration devices. Furthermore, the aeration unit in this solution operates periodically only as an auxiliary flushing unit, thus having minimal impact on the settling environment of the sedimentation tank. In summary, the sedimentation tank with this structure in this embodiment has advantages such as high operating efficiency and long service life. Moreover, the sedimentation tank with this structure also reduces maintenance costs and simplifies the operation process, demonstrating broad application prospects and economic benefits.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sedimentation tank with anti-clogging function, comprising a tank body (10) and a central pipe (20) located within the tank body (10), characterized in that, An aeration unit is provided on the central pipe (20). The aeration unit includes an aeration component and an aeration pipe. The aeration pipe is located between the aeration component and the central pipe (20), and its two ends are respectively connected to the aeration component and the central pipe (20). The aeration airflow released by the aeration component during periodic operation enters the central pipe (20) through the aeration pipe and forms a turbulent water flow in the central pipe (20).

2. The sedimentation tank with anti-clogging function according to claim 1, characterized in that, The aeration pipe may contain only an air supply branch pipe (301), or the aeration pipe may contain a ring main pipe (305) and an air supply branch pipe (301). When only the gas supply branch pipe (301) is included, the gas supply branch pipe (301) connects the aeration assembly to the central pipe (20); When the annular main pipe (305) and the gas supply branch pipe (301) are included, the annular main pipe (305) is sleeved on the central pipe (20), and the annular main pipe (305) is provided with multiple sets of connecting pipes (308) that communicate with the central pipe (20). The gas supply branch pipe (301) connects the aeration component to the annular main pipe (305).

3. The sedimentation tank with anti-clogging function according to claim 1, characterized in that, The connection end of the aeration pipe and the central pipe (20) is arranged at an angle of 40°-50° upward to ensure that the aeration airflow is in the same direction as the water flow in the central pipe (20).

4. The sedimentation tank with anti-clogging function according to claim 1, characterized in that, One end of the aeration pipe that is connected to the central pipe (20) extends into the central pipe (20), and a plurality of microporous aerators (306) are provided at the end of the aeration pipe located in the central pipe (20). The microporous aerators (306) are disc-type or tubular-type, and the microporous aerators (306) serve as airflow output ends to uniformly release tiny bubbles into the central pipe (20).

5. The sedimentation tank with anti-clogging function according to claim 1, characterized in that, The output end of the aeration pipe is equipped with a filter screen (307) to intercept large particulate impurities. The pore size of the filter screen (307) is less than or equal to 3mm. At the same time, the material of the filter screen (307) is SS316 stainless steel or nylon.

6. The sedimentation tank with anti-clogging function according to claim 1, characterized in that, The aeration unit also includes an aeration controller (304) for controlling the aeration components to start automatically and periodically. The aeration controller (304) is a time-delay relay.

7. The sedimentation tank with anti-clogging function according to claim 6, characterized in that, The time delay relay is a model 3RP1 digital relay.

8. The sedimentation tank with anti-clogging function according to claim 1, characterized in that, The aeration pipe is made of stainless steel or engineering plastic.

9. The sedimentation tank with anti-clogging function according to claim 1, characterized in that, The aeration assembly includes an aeration pump (302) and an external air source (303) connected thereto.

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