Air floatation system

Abstract

The utility model provides an air flotation system, which relates to the technical field of fresh oyster cultivation, and comprises an air flotation barrel, the air flotation barrel is respectively provided with three separation nets from top to bottom so as to form an air flotation area, a mixing area, a first settling area and a second settling area which are communicated with one another, and the top of the air flotation barrel is provided with a scum drain outlet communicated with the air flotation area; the air floatation area is communicated with a water inlet for connecting a water body to be treated and a first air port for air floatation; the mixing area is provided with a water outlet for discharging the treated water body and a second gas port; a first circulating water pump for mutual communication and circulation is arranged between the mixing area and the first settling area; a second circulating water pump for mutual communication and circulation is arranged between the first settling zone and the second settling zone; and a deposition drain outlet is formed in the bottom of the air flotation barrel. The problem that the solid-liquid separation efficiency is not high due to the fact that substances are difficult to remove through traditional physical filtration in the background technology can be solved, and the water treatment capacity under the same time is further improved.

Description

Technical Field

[0001] This utility model relates to the field of oyster farming technology, specifically to an air flotation system. Background Technology

[0002] Currently, both domestic and international methods for oyster temporary holding and purification utilize water treatment technology. This involves treating the aquaculture water to achieve the desired effect of oyster temporary holding and purification. Existing main aquaculture water treatment methods include two modes: flowing water temporary holding and purification, and recirculating water temporary holding and purification. In flowing water temporary holding and purification, the pre-treated water is introduced into the aquaculture pond to temporarily hold and purify the oysters. Aeration is used to maintain dissolved oxygen levels in the pond. After a period of time, when the water's physicochemical indicators become too low to support oyster survival, all or part of the water in the pond is drained and replaced with treated fresh water. This process is repeated until the oyster temporary holding and purification is complete.

[0003] Recirculating water purification involves drawing water from the aquaculture ponds into a large-capacity tank for treatment. Physical filtration is performed using filter media such as coral stone, zeolite, and quartz sand, followed by biological purification through nitrifying bacteria. The treated water is then reintroduced into the storage tank for reuse. While physical filtration relies on gravity sedimentation, this method is ineffective at removing certain substances (such as suspended solids, grease, colloids, and fine particles), limiting the system's processing capacity.

[0004] Therefore, this utility model proposes an air flotation system. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention proposes an air flotation system that can solve the problems of substances that are difficult to remove and the low efficiency of solid-liquid separation in traditional physical filtration, thereby increasing the amount of water that can be processed in the same amount of time.

[0006] The technical solution of this utility model is implemented as follows:

[0007] An air flotation system includes an air flotation tank. The air flotation tank has three partitions arranged from top to bottom to separate and form interconnected air flotation zones: an air flotation zone, a mixing zone, a first sedimentation zone, and a second sedimentation zone. The top of the air flotation tank has a scum discharge port communicating with the air flotation zones. The air flotation zones are connected to an inlet for receiving water to be treated and a first air outlet for air flotation. The mixing zone has an outlet for discharging treated water and a second air outlet. A first circulating water pump is provided between the mixing zone and the first sedimentation zone for interconnected circulation. A second circulating water pump is provided between the first sedimentation zone and the second sedimentation zone for interconnected circulation. The bottom of the air flotation tank has a sediment discharge port.

[0008] Preferably, the scum discharge outlet is provided with a vertically arranged discharge pipe, and the top of the discharge pipe is provided with a downwardly inclined bend.

[0009] Preferably, the inclination angle of the bent portion is 15°-30°.

[0010] Preferably, a first air valve is provided at the first air inlet, a second air valve is provided at the second air inlet, a first water valve is provided at the connection point of the first circulating water pump, and a second water valve is provided at the connection point of the second circulating water pump.

[0011] Preferably, the second air inlet is connected to the first circulating water pump.

[0012] Preferably, the air flotation zone is equipped with a water level connector for observing the water level.

[0013] Preferably, a third connecting valve is provided at the sediment discharge outlet.

[0014] Preferably, the three mesh screens arranged from top to bottom are filter screens with progressively smaller mesh sizes.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This scheme uses three interconnected flotation zone, mixing zone, first sedimentation zone, and second sedimentation zone separated by three mesh screens. Water from the temporary holding tank is circulated through the inlet to the flotation tank until a suitable water level is reached. The second circulating water pump then operates, circulating water from the second sedimentation zone to the first sedimentation zone to promote mixing. Simultaneously, the first circulating water pump circulates water from the first sedimentation zone to the mixing zone, improving overall circulation and uniform mixing within the flotation tank. The required gas is injected into the water through the first and second air inlets, forming microbubbles. These microbubbles combine with suspended particles in the water that are difficult to physically settle, forming scum that gradually rises to the flotation zone and is finally discharged through the scum discharge outlet. Sediment settles in the second sedimentation zone, achieving efficient separation and significantly improving water treatment capacity and efficiency. Regular cleaning is performed using the sediment discharge outlet according to actual needs. This scheme addresses the problems of traditional physical filtration's inability to remove substances and low solid-liquid separation efficiency, thereby increasing the water treatment capacity in the same amount of time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an air flotation system according to the present invention;

[0019] Attached diagram labels: 1-Air flotation tank; 11-Separator; 12-Scum discharge outlet; 13-Water inlet; 14-First air inlet; 15-Water outlet; 16-Second air inlet; 17-First circulating water pump; 18-Second circulating water pump; 19-Sediment discharge outlet; 2-Air flotation zone; 3-Mixing zone; 4-First sedimentation zone; 5-Second sedimentation zone. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 for 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," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] This embodiment proposes an air flotation system, such as Figure 1As shown, the system includes an air flotation tank 1. The air flotation tank 1 has three partitions 11 arranged from top to bottom to separate and form interconnected air flotation zones 2, 3, 4 (first sedimentation zone), and 5 (second sedimentation zone). The top of the air flotation tank 1 has a scum discharge outlet 12 connected to the air flotation zone 2. The air flotation zone 2 is connected to an inlet 13 for receiving water to be treated and a first air outlet 14 for air flotation. The 3 (mixing zone) has an outlet 15 for discharging treated water and a second air outlet 16. A first circulating water pump 17 is provided between the 3 (mixing zone) and the 4 (first sedimentation zone) for interconnected circulation. A second circulating water pump 18 is provided between the 4 (first sedimentation zone) and the 5 (second sedimentation zone) for interconnected circulation. The bottom of the air flotation tank 1 has a sediment discharge outlet 19.

[0024] In this embodiment, the scum discharge outlet 12 is vertically equipped with a discharge pipe. Figure 1 The description, though not explicitly stated, indicates that the top of the sewage pipe is provided with a downward-sloping bend, with an inclination angle of 15°-30°, which facilitates the discharge of scum that has been floated up by air as it tilts and falls downwards under its own weight upon reaching the bend.

[0025] In this embodiment, a first air valve is provided at the first air port 14, a second air valve is provided at the second air port 16, a first water valve is provided at the connection point of the first circulating water pump 17, and a second water valve is provided at the connection point of the second circulating water pump 18. The air valves and water valves can be adjusted according to the actual situation, such as adjusting the air valve flow rate to enhance the flotation effect, or adjusting the water valve flow rate to adjust the mixing efficiency. The second air port 16 is connected to the first circulating water pump 17. By controlling the first air port and the second air port, the amount of air, foam and the removal efficiency of suspended particles in the flotation tank can be controlled. During circulation, the second air port is connected to the first circulating water pump for pre-mixing before being connected to the mixing zone to achieve a better mixing effect.

[0026] In this embodiment, the air flotation zone 2 is equipped with a water level gauge for observing the water level. It is installed on the outside of the air flotation tank to visually display the water level inside the tank, making it convenient for operators to adjust the water intake and system operation status according to the actual situation.

[0027] In this embodiment, a third connecting valve is provided at the sediment discharge outlet 19 to periodically clean the sediment in the second sedimentation zone as needed.

[0028] In this embodiment, the three mesh screens 11 arranged from top to bottom are filter screens with progressively smaller mesh sizes. When air flotation is implemented, the sediment is filtered and settled layer by layer to improve the mixing efficiency. At the same time, the circulating water channels of the first sedimentation layer and the second sedimentation layer can be equipped with matching filter screens to prevent the sediment from being drawn back during circulation.

[0029] Working principle: Three interconnected flotation zones (2, 3, 4, and 5) are formed by separating the flotation tank with three mesh screens (11). Water from the temporary holding tank is circulated through inlet (13) to the flotation tank 1 until a suitable water level is reached. Then, the second circulating water pump (18) starts working, circulating water from the second sedimentation zone 5 to the first sedimentation zone 4 to promote mixing. Simultaneously, the first circulating water pump (17) circulates water from the first sedimentation zone 4 to the mixing zone 3, improving overall circulation and uniform mixing within the flotation tank 1. Water is injected through the first air inlet (14) and the second air inlet (16). The required gas forms microbubbles, which combine with suspended particles in the water that are difficult to settle physically, forming scum that gradually rises to the flotation zone 2 and is finally discharged through the scum discharge outlet 12. The sediment settles in the second sedimentation zone 5 to achieve efficient separation, greatly improving the water treatment capacity and efficiency. According to actual needs, the sediment discharge outlet 19 can be used for regular cleaning. This solution solves the problems of substances that are difficult to remove and the low efficiency of solid-liquid separation in traditional physical filtration in the background technology, thereby increasing the amount of water treated in the same amount of time.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air flotation system, characterized in that: The system includes an air flotation tank (1), which is provided with three partitions (11) from top to bottom to separate and form an interconnected air flotation zone (2), a mixing zone (3), a first sedimentation zone (4), and a second sedimentation zone (5). The top of the air flotation tank (1) is provided with a scum discharge port (12) connected to the air flotation zone (2). The air flotation zone (2) is connected to an inlet (13) for receiving water to be treated and a first air outlet (14) for air flotation. The mixing zone (3) is provided with an outlet (15) for discharging treated water and a second air outlet (16). A first circulating water pump (17) is provided between the mixing zone (3) and the first sedimentation zone (4) for interconnected circulation. A second circulating water pump (18) is provided between the first sedimentation zone (4) and the second sedimentation zone (5) for interconnected circulation. The bottom of the air flotation tank (1) is provided with a sediment discharge port (19).

2. The air flotation system according to claim 1, characterized in that: The scum discharge outlet (12) is vertically equipped with a discharge pipe, and the top of the discharge pipe is provided with a downwardly inclined bend.

3. The air flotation system according to claim 2, characterized in that: The inclination angle of the bent portion is 15°-30°.

4. The air flotation system according to claim 1, characterized in that: A first air valve is provided at the first air port (14), a second air valve is provided at the second air port (16), a first water valve is provided at the connection of the first circulating water pump (17), and a second water valve is provided at the connection of the second circulating water pump (18).

5. The air flotation system according to claim 4, characterized in that: The second air port (16) is connected to the first circulating water pump (17).

6. The air flotation system according to claim 1, characterized in that: The air flotation zone (2) is equipped with a water level gauge for observing the water level.

7. The air flotation system according to claim 1, characterized in that: A third connecting valve is provided at the sediment discharge outlet (19).

8. The air flotation system according to claim 1, characterized in that: The three meshes (11) arranged from top to bottom are filters with progressively smaller mesh sizes.

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