Defoaming aeration tank device
By using high-speed airflow and defoaming chamber structure design, combined with defoaming components such as impellers and spikes, the problem of incomplete foam removal in aeration tanks is solved, allowing oxygen to fully integrate into the wastewater and avoiding the purification burden and negative impacts of chemical agents.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-04-07
AI Technical Summary
Existing technologies using water spraying or defoamers to remove foam from aeration tanks are ineffective, especially for oily foam. Water spraying increases the purification burden, while defoamers have negative chemical effects.
A defoaming aeration tank device is designed, which utilizes high-speed airflow and defoaming chamber structure. Through the combination of jet pipe and exhaust pipe, negative pressure is generated to suck in and break up foam. Combined with defoaming components such as impeller and spikes, complete foam removal is achieved.
It effectively removes foam from the surface of the aeration tank, ensuring that oxygen is fully incorporated into the wastewater, thus avoiding the burden of purification and the negative effects of chemical agents.
Smart Images
Figure CN224091726U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, specifically to a defoaming aeration tank device. Background Technology
[0002] Centralized treatment of organic wastewater using aeration tanks is a commonly used method in wastewater treatment. Aeration tanks utilize activated sludge for wastewater treatment, providing a certain retention time to meet the oxygen requirements of aerobic microorganisms and ensure sufficient mixing between wastewater and activated sludge. Aeration tanks are a common means of wastewater treatment. However, large amounts of white foam often appear in aeration tanks as the reaction proceeds. This is due to the presence of surfactants such as detergents and cleaning agents in the water. When these foams accumulate in large quantities, they block sunlight, preventing the reactants in the tank from receiving adequate sunlight and slowing down the reaction rate. Furthermore, the foam traps some of the dirt at the top, hindering the reaction with the activated sludge at the bottom and affecting the purification process. Therefore, once a large amount of foam is generated, it needs to be removed.
[0003] Patent CN218202409U provides a defoaming aeration tank system, including a primary aeration tank, which is connected to a secondary aeration tank via a water guide channel. The water guide channel is equipped with a primary demister and a secondary demister. The primary demister is connected to a dosing tank via a dosing pump. The dosing tank is connected to a spray plate via a spray pump. The spray plate is located above the secondary aeration tank. The secondary demister is connected to the dosing tank via a dosing pump. The chemical solution in the dosing tank is used to eliminate foam in the secondary aeration tank.
[0004] However, the existing defoaming methods mentioned above use water spraying or add defoaming agents. However, water spraying cannot effectively remove oily foam, and adding water will increase the purification burden on the aeration tank. Furthermore, defoaming agents, as chemical agents, will have many negative effects. Utility Model Content
[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a defoaming aeration tank device. This solves the technical problems of existing technologies that use water spraying or adding defoamers, but water spraying cannot effectively remove oily foam, and adding water will increase the purification burden of the aeration tank. Furthermore, defoamers, as chemical agents, will have many negative effects.
[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:
[0007] This utility model provides a defoaming aeration tank device, comprising:
[0008] Aeration tank;
[0009] The mounting components are slidably installed in the aeration tank; and
[0010] The defoaming assembly includes a housing, a jet pipe, and an air source device. The housing is disposed on the mounting assembly and has a defoaming chamber, an air inlet, an exhaust outlet, and a foam inlet. The foam inlet faces the aeration tank. One end of the jet pipe is connected to the air inlet, and the air source device is connected to the other end of the jet pipe to spray air into the exhaust outlet through the jet pipe.
[0011] In some embodiments, one end of the jet pipe is inserted into the defoaming chamber from the air inlet, and the end of the jet pipe extending into the defoaming chamber is provided with a Laval nozzle.
[0012] In some embodiments, the defoaming assembly further includes an exhaust pipe, one end of which is inserted into the defoaming chamber from the exhaust port. The exhaust pipe is spaced apart from the jet pipe, and the space between the exhaust pipe and the jet pipe corresponds to the foam inlet.
[0013] In some embodiments, the end of the exhaust pipe that extends into the defoaming chamber is gradually widened.
[0014] In some embodiments, the exhaust pipe is further provided with a defoaming component, which is used to break up the foam entering the exhaust pipe.
[0015] In some embodiments, the defoaming component includes an impeller, which is rotatably mounted inside the exhaust pipe; or
[0016] The defoaming component includes multiple spikes, which are spaced apart on the inner wall of the exhaust pipe.
[0017] In some embodiments, the defoaming assembly further includes a bubble suction tube, one end of which is connected to the foam inlet, and the other end of which is gradually widened.
[0018] In some embodiments, the other end of the suction tube is bent horizontally to form a bend, and the bend is movably configured so that the position of the other end of the suction tube is adjustable.
[0019] In some embodiments, the bubble suction tube includes a first connecting tube, a flexible connecting elbow, and a second connecting tube connected in sequence. The first connecting tube is connected to the foam inlet, and the second connecting tube constitutes the bend.
[0020] In some embodiments, the mounting assembly includes a mounting base and a drive mechanism. The mounting base is slidably mounted on the aeration tank along a first direction. The defoaming assembly is disposed on the mounting base. The drive mechanism is connected to the mounting base to drive the mounting base to move.
[0021] Compared with the prior art, the defoaming aeration tank device provided by this utility model has an installation component slidably installed on the aeration tank, and a housing installed on the installation component. The installation component drives the housing to reciprocate on the aeration tank. In specific use, the air source device delivers high-speed airflow into the defoaming chamber through the jet pipe. Under the action of the high-speed airflow, a negative pressure environment is generated in the defoaming chamber, which can draw the foam generated by the aeration tank into the defoaming chamber from the foam inlet and break the foam with the airflow. Then, the foam is discharged from the exhaust port with the airflow. At the same time, the installation component drives the defoaming component to move slowly, completely removing all the foam on the aeration tank. This avoids the wastewater surface being covered by a large amount of foam, which prevents oxygen in the air from being fully integrated into the wastewater in time, thus affecting the oxygenation capacity. It also solves the problems of using water spraying or adding defoamers, but water spraying cannot effectively remove oily foam, and adding water will increase the purification burden of the aeration tank. Furthermore, defoamers are chemical agents and have many negative effects.
[0022] The above description is merely an overview of the technical solution of this utility model. To better understand the technical means of this utility model and to enable its implementation according to the description, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the defoaming aeration tank device provided by this utility model;
[0024] Figure 2 yes Figure 1 Cross-sectional view of the defogging component;
[0025] Figure 3 yes Figure 1 A top view of the defoaming aeration tank device.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1-Aeration tank, 2-Installation assembly, 21-Mounting base, 22-Drive mechanism, 221-Screw nut, 222-Screw, 223-Motor, 3-Defoaming assembly, 31-Shell, 311-Defoaming chamber, 32-Air jet pipe, 321-Laval nozzle, 33-Exhaust pipe, 331-Impeller, 332-Grid mesh, 34-Suction pipe, 341-First connecting pipe, 342-Flexible connecting elbow, 343-Second connecting pipe. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0029] To address the technical problems of existing technologies that use water spraying or defoaming agents, where water spraying fails to effectively remove oily foam and adding water increases the purification burden on the aeration tank, while defoaming agents, being chemical agents, can cause many negative effects, this invention provides a defoaming aeration tank device. This device can completely remove all foam from the aeration tank, thereby preventing the wastewater surface from being covered by a large amount of foam, which would prevent oxygen from the air from fully dissolving into the wastewater and affecting oxygenation capacity. It also solves the problems associated with using water spraying or defoaming agents, where water spraying fails to effectively remove oily foam, adding water increases the purification burden on the aeration tank, and defoaming agents, being chemical agents, can cause many negative effects.
[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the defoaming aeration tank device in one embodiment of the present invention.
[0031] This utility model provides a defoaming aeration tank device, including an aeration tank 1, an installation component 2, and a defoaming component 3; the installation component 2 is slidably installed on the aeration tank 1; the defoaming component 3 includes a housing 31, a jet pipe 32, and an air source device. The housing 31 is disposed on the installation component 2, and the housing 31 has a defoaming chamber 311, an air inlet, an exhaust outlet, and a foam inlet. The foam inlet faces the aeration tank 1. One end of the jet pipe 32 is connected to the air inlet, and the air source device is connected to the other end of the jet pipe 32 to spray air to the exhaust outlet through the jet pipe 32.
[0032] In this embodiment, please refer to Figures 1 to 3The mounting assembly 2 is slidably mounted on the aeration tank 1, and the housing 31 is mounted on the mounting assembly 2. The mounting assembly 2 drives the housing 31 to reciprocate on the aeration tank 1. In specific use, the air source device delivers high-speed airflow into the defoaming chamber 311 through the jet pipe 32. Under the action of the high-speed airflow, a negative pressure environment is generated in the defoaming chamber 311, which can draw the foam generated by the aeration tank 1 into the defoaming chamber 311 from the foam inlet and break the foam with the airflow. Then, the foam is discharged from the exhaust port with the airflow. At the same time, the mounting assembly 2 drives the defoaming assembly 3 to move slowly, completely removing all the foam on the aeration tank 1. This avoids the surface of the sewage being covered by a large amount of foam, which prevents oxygen in the air from dissolving into the sewage in time and thus affecting the oxygenation capacity. It also solves the problems of using water spray or adding defoamer, but water spray cannot effectively remove oily foam, and adding water will increase the purification burden of the aeration tank 1. Furthermore, defoamer is a chemical agent and will have many negative effects.
[0033] In this embodiment, the aeration tank 1 is a rectangular tank with an open top. For ease of explanation, the length direction of the aeration tank 1 is the first direction. The mounting assembly 2 is slidably mounted on the upper end of the aeration tank 1 along the first direction. The air inlet and the exhaust outlet are located on opposite sides of the housing 31 along the first direction. The foam inlet is located at the bottom of the housing 31 and is arranged facing into the aeration tank 1.
[0034] In this embodiment, please refer to Figure 2 One end of the jet pipe 32 is inserted into the defoaming chamber 311 from the air inlet, and the end of the jet pipe 32 that extends into the defoaming chamber 311 is provided with a Laval nozzle 321.
[0035] Specifically, in order to increase the flow rate of gas entering the defoaming chamber 311, a Laval nozzle 321 is installed at one end of the jet pipe 32. The diameter of the Laval nozzle 321 gradually narrows from both ends to the middle. When the gas enters the first half of the Laval nozzle 321, the gas movement follows the principle that "when a fluid moves in a pipe, the flow velocity is high where the cross-section is small and low where the cross-section is large". Therefore, the airflow is continuously accelerated. When the gas reaches the middle of the Laval nozzle 321, the flow velocity has exceeded the speed of sound. However, when a transonic fluid moves, it no longer follows the principle of "the flow velocity is high where the cross-section is small and low where the cross-section is large". Instead, the opposite is true: the larger the cross-section, the faster the flow velocity. In the latter half of the Laval nozzle 321, the gas flow velocity is further accelerated. Therefore, when the gas enters the Laval nozzle 321 from the jet pipe 32, it will be accelerated. The accelerated gas generates a certain negative pressure in the defoaming chamber 311, causing the foam to be drawn into the defoaming chamber 311 and come into contact with the gas, thereby achieving the purpose of breaking the foam.
[0036] In this embodiment, please refer to Figure 2 The defoaming assembly 3 also includes an exhaust pipe 33, one end of which is inserted into the defoaming chamber 311 from the exhaust port. The exhaust pipe 33 and the jet pipe 32 are spaced apart, and the space between the exhaust pipe 33 and the jet pipe 32 corresponds to the foam inlet.
[0037] Specifically, the diameter of the exhaust pipe 33 is adapted to the exhaust port, the exhaust pipe 33 is installed on the exhaust port, and one end of it extends into the defoaming chamber 311. The exhaust pipe 33 and the jet pipe 32 are arranged at intervals along the first direction, and the other end of the exhaust pipe 33 is bent downward toward the aeration tank 1. This arrangement enables the liquid generated by breaking up the foam to be transported back into the aeration tank 1.
[0038] In this embodiment, please refer to Figure 2 The end of the exhaust pipe 33 that extends into the defoaming chamber 311 is gradually widened.
[0039] Specifically, one end of the exhaust pipe 33 is flared, making the diameter of the end of the exhaust pipe 33 much larger than the diameter of the end of the jet pipe 32. This arrangement can serve to guide the flow and ensure that most of the gas can enter the exhaust pipe 33.
[0040] In this embodiment, please refer to Figure 2 In order to further improve the defoaming effect, the exhaust pipe 33 is also provided with a defoaming component, which is used to break up the foam that enters the exhaust pipe 33.
[0041] In one embodiment, the defoaming component includes an impeller 331, which is rotatably mounted inside the exhaust pipe 33.
[0042] Specifically, the impeller 331 is rotatably mounted on the side wall of the exhaust pipe 33 along the axis in the second direction. The second direction is perpendicular to the first direction. The high-speed airflow can drive the impeller 331 to rotate, thereby using the rotating impeller 331 to strike the foam entering the exhaust pipe 33 for further defoaming.
[0043] In another embodiment, the defoaming component includes a plurality of spikes spaced apart on the inner wall of the exhaust pipe 33. When residual foam enters the exhaust pipe 33, the spikes can puncture the foam, thereby defoaming.
[0044] In another embodiment, the defoaming component includes a grid 332, which is adapted to the exhaust pipe 33 and is arranged inside the exhaust pipe 33 to break up the foam.
[0045] In this embodiment, please refer to Figure 2 The defoaming component includes an impeller 331 and multiple grids 332. The impeller 331 is rotatably installed inside the exhaust pipe 33, and the multiple grids 332 are spaced apart inside the exhaust pipe 33 along the gas flow direction. The defoaming effect is improved by the combined use of the impeller 331 and the grids 332.
[0046] In this embodiment, please refer to Figure 2 The defoaming component 3 also includes a bubble suction tube 34, one end of which is connected to the foam inlet, and the other end of which is gradually widened.
[0047] Specifically, since the aeration tank 1 is rectangular, the large amount of foam generated will cover the entire aeration tank 1. In order to improve the defoaming efficiency, one end of the bubble suction pipe 34 is connected to the foam inlet, and the other end is set towards the aeration tank 1. Furthermore, the other end of the bubble suction pipe 34 is set in a trumpet shape, that is, it is gradually widened in both the vertical and second directions. This can increase the foam intake rate and thus improve the defoaming efficiency.
[0048] In this embodiment, please refer to Figure 2 The other end of the suction tube 34 is bent in the horizontal direction to form a bend, and the bend is movably arranged so that the position of the other end of the suction tube 34 is adjustable.
[0049] Specifically, since the water level in the aeration tank 1 will change, the height of the foam will also change. In order to adapt to the change of water level, the bending part is rotated so that the other end of the bubble suction tube 34 is adjustable in the vertical direction. Thus, the bubble suction tube 34 can be adjusted in real time according to the change of water level and foam height to ensure that the bubble suction tube 34 is always in the optimal suction position.
[0050] In this embodiment, please refer to Figure 2 The bubble suction tube 34 includes a first connecting tube 341, a flexible connecting elbow 342, and a second connecting tube 343 connected in sequence. The first connecting tube 341 is connected to the foam inlet, and the second connecting tube 343 constitutes the bend.
[0051] Specifically, the first connecting pipe 341 extends vertically, and one end of the first connecting pipe 341 is connected to the foam inlet. The bending angle of the flexible connecting elbow 342 is adjustable, which can drive the second connecting pipe 343 to move, thereby adjusting the tilt angle of the second connecting pipe 343 so that the height of the end of the second connecting pipe 343 is adjustable.
[0052] Furthermore, multiple defoaming components 3 are provided, and the multiple defoaming components 3 are arranged at intervals along the second direction.
[0053] In this embodiment, please refer to Figure 3 The mounting assembly 2 includes a mounting base 21 and a driving mechanism 22. The mounting base 21 is slidably mounted on the aeration tank 1 along a first direction. The defoaming assembly 3 is disposed on the mounting base 21. The driving mechanism 22 is connected to the mounting base 21 to drive the mounting base 21 to move.
[0054] Specifically, slide rails are provided on opposite sides of the aeration tank 1, the mounting base 21 is slidably mounted on the slide rails, the drive mechanism 22 is mounted on one end of the aeration tank 1, and the drive mechanism 22 is connected to the mounting base 21, thereby driving the mounting base 21 to reciprocate in the first direction.
[0055] Furthermore, the drive mechanism 22 includes a lead screw nut 221, a lead screw 222, and a motor 223. The lead screw nut 221 is mounted on the mounting base 21, and the lead screw 222 is rotatably mounted on the aeration tank 1 along an axis in a first direction. The lead screw 222 is threadedly engaged with the lead screw nut 221. The motor 223 is mounted at one end of the aeration tank 1, and the main shaft of the motor 223 is connected to one end of the lead screw 222 so as to drive the lead screw 222 to rotate through the motor 223.
[0056] To better understand this utility model, the following is combined with... Figures 1 to 3 The technical solution of this utility model is described in detail below:
[0057] In practical use, the mounting base 21 is initially positioned at one end of the aeration tank 1, and the inlet end of the bubble suction pipe 34 faces the other end of the aeration tank 1. When the aeration tank 1 produces a large amount of foam, the position of the bubble suction pipe 34 is adjusted so that it faces the foam. Then, the air source device is activated, and airflow is delivered into the defoaming chamber 311 through the jet pipe 32. The airflow forms a high-speed airflow under the acceleration of the Laval nozzle 321. When the high-speed airflow flows towards the exhaust pipe 33, it creates a negative pressure in the defoaming chamber 311, thereby allowing the foam produced by the aeration tank 1 to be drawn out from the bubble suction pipe. The foam is drawn into the defoaming chamber 311 and broken up by the high-speed airflow. Then, it is discharged from the exhaust pipe 33 with the airflow. In the exhaust pipe 33, the airflow drives the impeller 331 to rotate, further breaking up the foam. At the same time, the grid 332 can also assist in breaking up the foam, achieving complete defoaming. Meanwhile, the motor 223 drives the lead screw 222 to rotate. Through the cooperation of the lead screw 222 and the lead screw nut 221, the mounting base 21 and the housing 31 move slowly, gradually drawing all the foam in the aeration tank 1 into the defoaming chamber 311 for breaking up, achieving a better defoaming effect.
[0058] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.
Claims
1. A defoaming aeration tank device, characterized in that, It includes: Aeration tank; The mounting components are slidably installed in the aeration tank; as well as The defoaming assembly includes a housing, a jet pipe, and an air source device. The housing is disposed on the mounting assembly and has a defoaming chamber, an air inlet, an exhaust outlet, and a foam inlet. The foam inlet faces the aeration tank. One end of the jet pipe is connected to the air inlet, and the air source device is connected to the other end of the jet pipe to spray air into the exhaust outlet through the jet pipe.
2. The defoaming aeration tank device according to claim 1, characterized in that, One end of the jet pipe is inserted into the defoaming chamber from the air inlet, and the end of the jet pipe that extends into the defoaming chamber is provided with a Laval nozzle.
3. The defoaming aeration tank device according to claim 1, characterized in that, The defoaming assembly also includes an exhaust pipe, one end of which is inserted into the defoaming chamber from the exhaust port. The exhaust pipe and the jet pipe are spaced apart, and the space between the exhaust pipe and the jet pipe corresponds to the foam inlet.
4. The defoaming aeration tank device according to claim 3, characterized in that, The end of the exhaust pipe that extends into the defoaming chamber is gradually widened.
5. The defoaming aeration tank device according to claim 3, characterized in that, The exhaust pipe is also equipped with a defoaming component, which is used to break up the foam that enters the exhaust pipe.
6. The defoaming aeration tank device according to claim 5, characterized in that, The defoaming component includes an impeller, which is rotatably mounted inside the exhaust pipe; or The defoaming component includes multiple spikes, which are spaced apart on the inner wall of the exhaust pipe.
7. The defoaming aeration tank device according to claim 1, characterized in that, The defoaming assembly also includes a bubble suction tube, one end of which is connected to the foam inlet, and the other end of which is gradually widened.
8. The defoaming aeration tank device according to claim 7, characterized in that, The other end of the suction tube is bent horizontally to form a bend, and the bend is movably configured so that the position of the other end of the suction tube is adjustable.
9. The defoaming aeration tank device according to claim 8, characterized in that, The bubble suction tube includes a first connecting tube, a flexible connecting elbow, and a second connecting tube connected in sequence. The first connecting tube is connected to the foam inlet, and the second connecting tube constitutes the bent section.
10. The defoaming aeration tank device according to claim 1, characterized in that, The mounting assembly includes a mounting base and a driving mechanism. The mounting base is slidably mounted on the aeration tank along a first direction. The defoaming assembly is disposed on the mounting base. The driving mechanism is connected to the mounting base to drive the mounting base to move.