Air floatation bubble column, air floatation separator, aquatic plant and animal breeding equipment

Abstract

The air flotation bubble stack tube includes an air-water mixture channel, a bubble stack chamber, and a drainage channel. The inlet end of the water channel is connected to the bubble stack chamber. Bubbles enter the bubble stack chamber from the outlet end of the air-water mixture channel, and some bubbles enter the drainage channel. The bubbles stagnate and merge in the drainage channel, forming an air lock, which increases the drainage resistance of the drainage channel. The inlet end of the drainage channel is lower than the water level line (SW), and the outlet end of the air-water mixture channel is also lower than the water level line (SW). The outlet end (3-2) of the drainage channel is lower than the outlet of the air-water mixture channel. The vertical span (SK) of the drainage channel is greater than the horizontal span (HK). An air flotation separator or aquatic plant and animal cultivation equipment includes a bubble stack tube, which is the aforementioned bubble stack tube. This invention requires no additives, has a simple structure, ingenious design, and stable operation. It provides a new technical approach, alleviates a long-standing problem, and accelerates the start-up and recovery speed of air flotation equipment.

Description

Technical Field

[0001] This invention belongs to the field of air flotation, specifically relating to air flotation stacking tubes, air flotation separators, and aquatic plant and animal cultivation equipment. Background Technology

[0002] Air flotation is a treatment method that introduces air into wastewater, which then precipitates out of the water as bubbles to act as carriers. Pollutants such as emulsified oil and tiny suspended particles in the wastewater adhere to the bubbles and float to the surface with them, forming a three-phase mixture of air, water, and particles. By collecting the foam, scum, or single-layer bubble film, the purpose of separating impurities and purifying wastewater is achieved.

[0003] The existing bubble stacking tube structure is too simple and does not enhance the function of foam dehydration or the generation of single-layer bubble film. This results in the prior art being slow to generate concentrated bubbles (i.e., dry bubbles) or single-layer bubble film, which in turn leads to a slow start-up and a long time from start-up to successful bubble stacking. It is also slow to recover after being disturbed, and often leads users to mistakenly believe that the air flotation equipment is broken, resulting in many disputes. Improvement is necessary.

[0004] Some people on the internet have suggested adding pollutants to the water to speed up the start-up of the flotation equipment, but this contradicts the original intention of flotation technology to separate pollutants; there is room for improvement. Summary of the Invention

[0005] To address the aforementioned issues, air flotation stacking tubes, air flotation separators, and aquatic plant and animal cultivation equipment were proposed.

[0006] The air flotation bubble tube includes an air-water mixture channel (2), a bubble chamber (1), and a drainage channel (3). The inlet end (3-1) of the drainage channel is connected to the bubble chamber (1). Bubbles enter the bubble chamber (1) from the outlet end (2-1) of the air-water mixture channel. The excellent design features are:

[0007] Some air bubbles enter the drainage channel (3), and the air bubbles stagnate and merge in the drainage channel (3), forming an air plug in the drainage channel (3). The air plug increases the drainage resistance of the drainage channel. The inlet end (3-1) of the drainage channel is lower than the water level line (SW), and the outlet end (2-1) of the air-water mixture channel is lower than the water level line (SW). The outlet end (3-2) of the drainage channel is lower than the outlet end (2-1) of the air-water mixture channel. The vertical span (SK) of the drainage channel (3) is greater than the horizontal span (HK) of the drainage channel (3).

[0008] Furthermore: the number of drainage channels (3) is greater than 1.

[0009] Furthermore, the number of drainage channels (3) is an odd number greater than 2, making it difficult to cancel out the fluctuations of each drainage channel (3).

[0010] Furthermore: the minimum span of the drainage channel (3) in the horizontal direction is less than 2 mm.

[0011] Furthermore: the drainage channel (3) is a completely vertical channel.

[0012] Furthermore: the drainage channel (3) has an expansion zone, which slows down the water flow and facilitates the retention and merging of air bubbles.

[0013] Furthermore: the gas-water mixture channel (2) is coaxial with the bubble chamber (1).

[0014] Furthermore: the drainage channel (3) is arranged in a circular array around the axis of the gas-water mixture channel (2).

[0015] The air flotation separator, including the air flotation device, is well-designed in that it includes a bubble stack tube, which is the bubble stack tube described above.

[0016] The aquatic plant and animal cultivation equipment, including an air flotation device, is well-designed in that it includes a bubble stacking tube, which is the bubble stacking tube mentioned above.

[0017] Working principle:

[0018] Through long-term research, the inventors independently discovered that while the height of the foam column fluctuates within the foaming chamber, the airflow lifting force remains consistent. However, due to the different densities of dry and wet foams, the ratio of their gravitational force to the airflow lifting force differs. This results in different downward forces and accelerations for dry and wet foams as they fall, causing rapid separation between them during the foam column's descent. This enhances foam dehydration or the formation of monolayer foam films. Airlocks within the drainage channel increase drainage resistance. The drainage resistance generated by these airlocks counteracts the pressure generated by the foam column height, creating oscillations and causing periodic changes in drainage resistance. The specific automatic mechanism is as follows:

[0019] A1. When air bubbles merge in the drainage channel to form large air bubbles, air blockage is created, which increases drainage resistance and causes poor drainage.

[0020] A2. Poor drainage in the drainage channel leads to liquid stagnation and continuous increase in the bubble tube;

[0021] A3. Liquid stagnation in the foam stack tube causes the height of the foam column to increase continuously;

[0022] A4. As the height of the foam column continues to increase, the liquid pressure on the air plug continues to increase.

[0023] A5. When the hydraulic pressure of the foam column is greater than the resistance of the air plug, the air plug is partially or completely forced out from the drainage channel.

[0024] A6. The air plug overflows from the drainage channel, causing unobstructed drainage within the channel;

[0025] A7. Unobstructed drainage in the drainage channel leads to a reduction in liquid in the bubble tube;

[0026] A8. The decrease in liquid in the foam stack tube leads to a reduction in the height of the foam column;

[0027] A9. The reduced height of the foam column leads to a decrease in the hydraulic pressure inside the foam stack tube;

[0028] A10. The hydraulic pressure inside the foam stack tube decreases, which slows down the water flow in the drainage channel. The bubbles stay and merge in the drainage channel, thus creating an airlock; return to mechanism A1; this cycle repeats, causing the height of the foam column to fluctuate.

[0029] It is worth noting that although theoretical analysis suggests that the weight of the foam column and the air plug drainage resistance may be balanced, in actual production and daily life, they will never be stable at the equilibrium point. This is because during the operation of the air flotation equipment, due to the floating of bubbles and the processing errors of the equipment, turbulence is inevitable. Turbulence will disrupt the balance point of air plug drainage resistance and foam column weight, causing the two to be unable to stabilize at the equilibrium point and inevitably enter into oscillation.

[0030] This application identifies "the vertical span (SK) of the drainage channel (3) is greater than the horizontal span (HK) of the drainage channel (3)" as a key feature. This design makes it very easy to form a vertical, elongated airlock, which is not easily cut into multiple horizontally parallel bubbles by water flow. When hydraulically squeezed out of the drainage channel, it flows more smoothly. It operates stably and has extremely low cost, making it worthy of being protected as a separate application. Beneficial effects

[0031] Accelerate the start-up and recovery speed of the air flotation equipment.

[0032] By utilizing the hydraulic feedback of air plugs and foam columns, oscillations are created; the periodic generation and discharge of air plugs achieves periodic changes in drainage resistance in the drainage channel. The design is ingenious and hard to imagine.

[0033] A new technical approach is provided: "Utilizing the hydraulic feedback of air plugs and foam columns to create oscillations, thereby achieving periodic changes in drainage resistance and optimizing the start-up and recovery speed of the air flotation equipment."

[0034] Airlocks are generally considered a harmful phenomenon by those skilled in the art. The inventor transformed this harmful phenomenon into a beneficial design, breaking through traditional technical prejudices. This is an ingenious and unexpected concept.

[0035] Its simple structural design alleviated a long-standing problem.

[0036] It can improve the start-up and recovery speed of air flotation equipment without any additives.

[0037] In summary, this invention requires no additives, has a simple structure, ingenious design, and stable operation. It provides a new technical approach, alleviates a long-standing problem, and accelerates the start-up and recovery speed of air flotation equipment.

[0038] Glossary: ​​The term "foam column" as used in this article includes both wet and dry foam components; the term "foam column hydraulic pressure" as used in this article refers to the equivalent hydrostatic pressure of the foam column. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of Example 1.

[0040] Figure 2 yes Figure 1 A schematic diagram of cross-section AA.

[0041] Figure 3 This is a schematic diagram of Example 2.

[0042] Markings: 1, Bubble chamber; 2, Gas-water mixture channel; 2-1, Outlet end of gas-water mixture channel; 3, Drainage channel; 3-1, Inlet end of drainage channel; 3-2, Outlet end of drainage channel; 3-3, Expansion zone; 4, Foam collection pipe; SW, Water level line; B, Air pump; QS, Air stone. Detailed Implementation

[0043] Example 1, such as Figure 1 and 2 As shown, the air flotation bubble stacking tube includes an air-water mixture channel (2), a bubble stacking chamber (1), and a drainage channel (3). The inlet end (3-1) of the drainage channel is connected to the bubble stacking chamber (1). Bubbles enter the bubble stacking chamber (1) from the outlet end (2-1) of the air-water mixture channel. The excellent design features are:

[0044] Some air bubbles enter the drainage channel (3), and the air bubbles stagnate and merge in the drainage channel (3), forming an air plug in the drainage channel (3). The air plug increases the drainage resistance of the drainage channel. The inlet end (3-1) of the drainage channel is lower than the water level line (SW), and the outlet end (2-1) of the air-water mixture channel is lower than the water level line (SW). The outlet end (3-2) of the drainage channel is lower than the outlet end (2-1) of the air-water mixture channel. The vertical span (SK) of the drainage channel (3) is greater than the horizontal span (HK) of the drainage channel (3).

[0045] There are 4 drainage channels (3).

[0046] The drainage channel (3) is arranged in a circular array around the axis of the gas-water mixture channel (2).

[0047] Example 2, as Figure 3 As shown, the air flotation separator has an air flotation bubble stack tube. Unlike Example 1, the air flotation bubble stack tube has an expansion zone (3-3) in the drainage channel (3), which reduces the water flow velocity and facilitates bubble retention and merging, creating an airlock. It also has a collection pipe (4) to collect the portion from the center of dry bubbles or single-layer bubble films, resulting in a higher sludge concentration. It also includes an air pump (B) and an air stone (QS), connected by an air pipe. The air pump delivers gas to the air stone (QS) to generate bubbles. It can be used for the cultivation of aquatic organisms such as, but not limited to, fish, turtles, shrimp, aquatic plants, and chlorella.

[0048] Example 3 differs from Example 2 in that a needle brush pump, venturi tube, or rhomboid tube gas-liquid mixing tube is used as the bubble source.

[0049] Example 4: Aquatic plant and animal cultivation equipment, including an air flotation device, which includes the aforementioned air flotation stack tube. Examples include, but are not limited to, complete sets of fish tanks, fish ponds, and turtle tanks with auxiliary equipment.

Claims

1. An air flotation bubble tube, comprising an air-water mixture channel (2), a bubble chamber (1), and a drainage channel (3), wherein the inlet end (3-1) of the drainage channel is connected to the bubble chamber (1), and air bubbles enter the bubble chamber (1) from the outlet end (2-1) of the air-water mixture channel, characterized in that: Some bubbles enter the drainage channel (3), and the bubbles stagnate and merge in the drainage channel (3), forming an air plug in the drainage channel (3). The air plug increases the drainage resistance of the drainage channel. The drainage resistance generated by the air plug counteracts the pressure generated by the height of the foam column, forming an oscillation, which leads to periodic changes in the drainage resistance. The inlet end (3-1) of the drainage channel is lower than the water level line (SW), and the outlet end (2-1) of the air-water mixture channel is lower than the water level line (SW). The outlet end (3-2) of the drainage channel is lower than the outlet end (2-1) of the gas-water mixture channel. The vertical span (SK) of the drainage channel (3) is greater than the horizontal span (HK) of the drainage channel (3). The minimum span of the drainage channel (3) in the horizontal direction is less than 2 mm.

2. The air flotation stacking tube as described in claim 1, characterized in that: The number of drainage channels (3) is greater than 1.

3. The gas floatation bubble column of claim 1 wherein: The number of drainage channels (3) is an odd number greater than 2, making it difficult to cancel out the fluctuations of each drainage channel (3).

4. The gas floatation bubble column of claim 1 wherein: The drainage channel (3) is a completely vertical channel.

5. The gas floatation bubble column of claim 1 wherein: The drainage channel (3) has an expansion zone, which slows down the water flow and facilitates the retention and merging of air bubbles.

6. The gas floatation bubble column of claim 1 wherein: The gas-water mixture channel (2) is coaxial with the bubble chamber (1).

7. The gas floatation bubble column of claim 6 wherein: The drainage channel (3) is arranged in a circular array around the axis of the gas-water mixture channel (2).

8. A gas floatation separator comprising a bubble column, characterised in that: The bubble stacking tube is the bubble stacking tube as described in claim 1.

9. An aquatic plant and animal breeding apparatus comprising a bubble column, characterized by: The bubble stacking tube is the bubble stacking tube as described in claim 1.

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