Spiral-flow type and aeration type parallel microbubble generation device with oxygen slow release function

Abstract

The utility model belongs to the technical field of water ecological management and restoration, and discloses a spiral-flow type and aeration type parallel microbubble generating device with an oxygen slow-release function, which is used for circularly treating a water body to be treated. The microbubble generating device comprises a spiral-flow type device, an aeration type device, a liquid conveying device, a gas conveying device and a detection probe; the aeration type device comprises a horizontal cylinder, a first liquid outlet pipe and a microfiltration membrane connected in the cylinder; the microfiltration membrane divides the interior of the cylinder into a liquid passing cavity positioned on the inner side of the microfiltration membrane and a ventilation cavity positioned on the outer side of the microfiltration membrane. The microfiltration membrane made of ORC materials reacts with water in the liquid passing cavity to slowly release oxygen, when gas passes through the microfiltration membrane, the released high-concentration oxygen is carried to generate oxygen-enriched small bubbles on the inner surface of the microfiltration membrane, the bubbles are wrapped into the water body through liquid-phase shearing force by the water body in the liquid passing cavity to form microbubbles, and the oxygen-enriched small bubbles are formed. The dissolved oxygen content of the water body is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of water ecological governance and restoration technology, and specifically relates to a microbubble generator that combines swirling and aeration in parallel and has a slow-release oxygen function. Background Technology

[0002] Microbubble technology is one of the effective means to enhance wastewater treatment. However, existing microbubble generators have limited oxygenation adjustment range and are not suitable for situations with large fluctuations in water volume and quality. The dissolved oxygen concentration in water varies greatly between day and night, and decreases sharply with increasing water depth. These changes have a significant impact on submerged plants and aquatic animals, thus requiring a sustained release of oxygen into the water. Currently, single-function micro-nano bubble generators on the market cannot meet the application requirements under harsh conditions. Therefore, we propose a microbubble generator that combines swirling and aeration in parallel and also has a slow-release oxygen function to solve the above problems. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a microbubble generator that combines swirl and aeration in parallel and also features slow-release oxygen, thus solving the problem that existing single-function microbubble generators cannot meet the application requirements under harsh working conditions.

[0004] This utility model is achieved through the following scheme: a microbubble generator that combines a swirl flow and an aeration type in parallel and has a slow-release oxygen function, used to circulate the water to be treated. The microbubble generator includes a swirl flow device, an aeration device, a liquid conveying device connected to the swirl flow device and the aeration device and capable of conveying water to the swirl flow device and / or the aeration device, a gas conveying device connected to the swirl flow device and the aeration device and capable of conveying gas to the swirl flow device and / or the aeration device, and a detection probe for monitoring the dissolved oxygen concentration and turbidity of the water to be treated.

[0005] It also includes a control device for acquiring the dissolved oxygen concentration and turbidity of the water to be treated in real time and controlling the liquid conveying device to deliver water to the aeration device and / or swirl device according to the dissolved oxygen concentration and turbidity of the water to be treated, and controlling the gas conveying device to deliver gas to the aeration device and / or swirl device, so that the dissolved oxygen concentration and turbidity of the water body meet the first preset range value and the second preset range value respectively.

[0006] The aeration device includes a horizontal cylindrical tube, a first liquid outlet pipe, and a microporous filter membrane connected inside the cylindrical tube. The microporous filter membrane divides the interior of the cylindrical tube into a liquid passage chamber located inside the microporous filter membrane and an air passage chamber located outside the microporous filter membrane. One end of the liquid passage chamber is connected to a liquid conveying device, and the other end of the liquid passage chamber is connected to the first liquid outlet pipe. The end of the first liquid outlet pipe away from the liquid passage chamber extends into the water body to be treated, for discharging the water treated by the aeration device into the water body to be treated. The gas conveying device is connected to the air passage chamber, and the microporous filter membrane is made of ORC material.

[0007] A further improvement of this utility model of a microbubble generator that combines swirl and aeration in parallel and also has a slow-release oxygen function is that the swirl device includes a swirl cylinder, a second liquid inlet pipe, a second air inlet pipe, and a second liquid outlet pipe connected to the top of the swirl cylinder. One end of the second liquid inlet pipe is connected to a liquid conveying device, and the other end of the second liquid inlet pipe is connected to the swirl cylinder, which is used to guide the water entering the swirl cylinder to swirl along the inner wall of the swirl cylinder. One end of the second air inlet pipe is connected to a gas conveying device, and the other end of the second air inlet pipe is connected to the bottom of the swirl cylinder.

[0008] A further improvement of this utility model of a microbubble generator that combines swirl and aeration in parallel and also has a slow-release oxygen function is that the liquid delivery device includes a pump for extracting water, a delivery pipe connected to the pump, a first regulating valve, and a second regulating valve. The first end of the delivery pipe is connected to the liquid passage chamber, and the second end of the delivery pipe is connected to the second inlet pipe. The first regulating valve is installed at the first end of the delivery pipe, and the second regulating valve is installed at the second end of the delivery pipe.

[0009] The control device controls the liquid pump, the first regulating valve, and the second regulating valve. When the dissolved oxygen concentration in the water is below a first preset range and the turbidity is not above a second preset range, the control device opens the liquid pump and the first regulating valve while closing the second regulating valve.

[0010] Used to control the liquid pump and the second regulating valve to open and the first regulating valve to close when the dissolved oxygen concentration in the water body is not lower than a first preset range value and the turbidity is higher than a second preset range value, or

[0011] This is used to control the opening of the liquid pump, the first regulating valve, and the second regulating valve when the dissolved oxygen concentration in the water body is lower than a first preset range value and the turbidity is higher than a second preset range value.

[0012] A further improvement of this utility model of a microbubble generator combining swirl and aeration in parallel and with slow-release oxygen function is that the liquid delivery device further includes a booster pump, a first flow meter, and a second flow meter. The booster pump is connected between the liquid pump and the delivery pipe. The first flow meter is installed at the first end of the delivery pipe and is offset from the position of the first regulating valve. It is used to monitor the flow rate of the water flowing into the liquid passage chamber and feed it back to the control device to control the booster pump so that the flow rate of the water flowing into the liquid passage chamber matches the preset flow rate of the water in the liquid passage chamber. The second flow meter is installed at the second end of the delivery pipe and is offset from the position of the second regulating valve. It is used to detect the flow rate of the water flowing into the swirl tube and feed it back to the control device to control the booster pump so that the flow rate of the water flowing into the swirl tube matches the preset flow rate of the water in the swirl tube.

[0013] A further improvement of this utility model of a microbubble generator that combines swirl and aeration in parallel and has a slow-release oxygen function is that the gas delivery device includes an air compressor, a gas delivery pipe connected to the air compressor, a third regulating valve and a fourth regulating valve. The first end of the gas delivery pipe is connected to the ventilation chamber, and the second end of the gas delivery pipe is connected to the second air inlet pipe. The third regulating valve is installed at the first end of the gas delivery pipe, and the fourth regulating valve is installed at the second end of the gas delivery pipe.

[0014] The control device controls the air compressor, the third regulating valve, and the fourth regulating valve. When the dissolved oxygen concentration in the water is below a first preset range and the turbidity is not above a second preset range, the control device opens the air compressor and the third regulating valve while closing the fourth regulating valve.

[0015] Used to control the air compressor and the fourth regulating valve to open and the third regulating valve to close when the dissolved oxygen concentration in the water body is not lower than a first preset range value and the turbidity is higher than a second preset range value, or

[0016] This is used to control the air compressor, the third regulating valve, and the fourth regulating valve to open when the dissolved oxygen concentration in the water body is lower than the first preset range value and the turbidity is higher than the second preset range value.

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

[0018] This invention guides water into the vortex tube through a second inlet pipe, causing it to swirl along the inner wall of the vortex tube. A negative pressure is generated at the center of the swirling water, and pressurized gas enters the vortex tube through a second air inlet pipe, forming an air column inside. Under the action of rotational shearing and pressure breaking, the water generates microbubbles, which flow out through the second outlet pipe. This vortex device generates micro- and nano-bubbles while simultaneously breaking down flocs in the water. The microporous filter membrane, made of ORC material, reacts with the water in the liquid passage chamber to slowly release oxygen. When the gas enters the air passage chamber and passes through the microporous filter membrane, it carries the high concentration of oxygen released by the ORC material, generating oxygen-rich microbubbles on the inner surface of the membrane. The water passing through the liquid passage chamber is then encapsulated by these microbubbles due to liquid-phase shear force, forming microbubbles that flow out through the first outlet pipe, further increasing the dissolved oxygen content of the water. The vortex device and the aeration device are connected in parallel and can be selectively activated to meet different operating conditions. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of this utility model is shown.

[0020] In the diagram: 1. Swirl-type device; 11. Second air inlet pipe; 12. Air column; 13. Swirl cylinder; 14. Second liquid outlet pipe; 15. Second liquid inlet pipe; 2. Liquid conveying device; 21. Liquid extraction pipe; 22. Liquid extraction pump; 23. Booster pump; 24. Liquid delivery pipe; 25. Second regulating valve; 26. First regulating valve; 27. First flow rate gauge; 28. Second flow rate gauge; 3. Gas conveying device; 31. Air compressor; 32. Fourth regulating valve; 33. Third regulating valve; 34. Third flow rate gauge; 35. Fourth flow rate gauge; 36. Gas delivery pipe; 4. Aeration device; 41. First liquid inlet pipe; 42. Microporous filter membrane; 43. First liquid outlet pipe; 44. First air inlet pipe; 45. Liquid passage chamber; 46. Air passage chamber; 5. Detection probe. Detailed Implementation

[0021] To address the problem that existing single-function microbubble generators cannot meet the application requirements under harsh working conditions, this invention provides a microbubble generator that combines swirling and aeration in parallel and also features slow-release oxygen function. The following detailed description, in conjunction with the accompanying drawings, provides a specific embodiment of this microbubble generator that combines swirling and aeration in parallel and also features slow-release oxygen function.

[0022] See Figure 1As shown, a microbubble generator that combines a swirl flow and aeration in parallel and also has a slow-release oxygen function is used to circulate water to be treated. The microbubble generator includes a swirl flow device 1, an aeration device 4, a liquid conveying device 2 connected to the swirl flow device 1 and the aeration device 4 and capable of conveying water to the swirl flow device 1 and / or the aeration device 4, a gas conveying device 3 connected to the swirl flow device 1 and the aeration device 4 and capable of conveying gas to the swirl flow device 1 and / or the aeration device 4, and a detection probe 5 for monitoring the dissolved oxygen concentration and turbidity of the water to be treated.

[0023] It also includes a control device (not shown in the figure) for acquiring the dissolved oxygen concentration and turbidity of the water to be treated in real time and controlling the liquid conveying device 2 to convey water to the aeration device 4 and / or the swirl device 1 according to the dissolved oxygen concentration and turbidity of the water to be treated, and controlling the gas conveying device 3 to convey gas to the aeration device 4 and / or the swirl device 1, so that the dissolved oxygen concentration and turbidity of the water meet the first preset range value and the second preset range value respectively.

[0024] The aeration device 4 includes a horizontal cylindrical tube, a first liquid outlet pipe 43, and a microporous filter membrane 42 connected inside the cylindrical tube. The microporous filter membrane 42 divides the interior of the cylindrical tube into a liquid passage chamber 45 located inside the microporous filter membrane 42 and an air passage chamber 46 located outside the microporous filter membrane 42. One end of the liquid passage chamber 45 is connected to the liquid conveying device 2, and the other end of the liquid passage chamber 45 is connected to the first liquid outlet pipe 43. The end of the first liquid outlet pipe away from the liquid passage chamber extends into the water body to be treated, and is used to discharge the water body treated by the aeration device into the water body to be treated. The gas conveying device 3 is connected to the air passage chamber 46. The microporous filter membrane 42 is made of ORC material.

[0025] Specifically, the aeration device 4 also includes a first liquid inlet pipe 41 and a first air inlet pipe 44. The liquid conveying device 2 is connected to the liquid passage chamber 45 through the first liquid inlet pipe 41, and the gas conveying device 3 is connected to the air passage chamber 46 through the first air inlet pipe 44.

[0026] The control device acquires the dissolved oxygen concentration and turbidity of the water body in real time and controls the liquid conveying device 2 to deliver liquid to the aeration device 4 and / or the swirl device 1, and controls the gas conveying device 3 to deliver gas to the aeration device 4 and / or the swirl device 1, based on the dissolved oxygen concentration and turbidity of the water body. When the dissolved oxygen concentration of the water body is lower than the first preset range value and the turbidity is not higher than the second preset range value, the liquid conveying device 2 is controlled to deliver liquid to the aeration device 4, and the gas conveying device 3 is controlled to deliver gas to the aeration device 4. When the dissolved oxygen concentration of the water body is not lower than the first preset range value and the turbidity is higher than the second preset range value, the liquid conveying device 2 is controlled to deliver liquid to the swirl device 1, and the gas conveying device 3 is controlled to deliver gas to the swirl device 1. When the dissolved oxygen concentration of the water body is lower than the first preset range value and the turbidity is higher than the second preset range value, the liquid conveying device 2 is controlled to deliver liquid to both the swirl device 1 and the aeration device 4, and the gas conveying device 3 is controlled to deliver gas to both the swirl device 1 and the aeration device 4.

[0027] Furthermore, when the liquid conveying device 2 conveys liquid to the aeration device 4 and the gas conveying device 3 conveys gas to the aeration device 4, the microporous filter membrane 42 of the ORC material reacts with the water in the liquid passage chamber 45 to slowly release oxygen. After the gas enters the ventilation chamber 46, when the gas passes through the microporous filter membrane 42, it carries the high concentration of oxygen released by the ORC material to generate oxygen-rich small bubbles on the inner surface of the microporous filter membrane 42. The water in the liquid passage chamber 45 is wrapped with these bubbles by liquid phase shear force to form microbubbles, which then flow out from the first liquid outlet pipe 43, further increasing the dissolved oxygen content of the water. Moreover, the water flows inside the microporous filter membrane 42, while the gas passes through the microporous filter membrane 42 under pressure on the outside of the microporous filter membrane 42 and enters the water, which can effectively avoid the problem of clogging of the microporous filter membrane 42 by flocculants.

[0028] The vortex device 1 includes a vortex cylinder 13, a second liquid inlet pipe 15, a second air inlet pipe 11, and a second liquid outlet pipe 14 connected to the top of the vortex cylinder 13. One end of the second liquid inlet pipe 15 is connected to the liquid conveying device 2, and the other end of the second liquid inlet pipe 15 is connected to the vortex cylinder 13, which is used to guide the water entering the vortex cylinder 13 to swirl along the inner wall of the vortex cylinder 13. One end of the second air inlet pipe 11 is connected to the gas conveying device 3, and the other end of the second air inlet pipe 11 is connected to the bottom of the vortex cylinder 13.

[0029] The liquid guided into the vortex tube 15 swirls along the inner wall of the vortex tube 13. A negative pressure is generated at the center of the liquid swirling. Pressurized gas enters the vortex tube 13 from the second air inlet tube 11, forming an air column 12 inside the vortex tube 13. Under the action of rotational shearing and pressure crushing, the liquid generates microbubbles, which flow out from the second liquid outlet tube 14. This vortex device 1 generates micro- and nano-bubbles while destroying the flocs generated in the water. Destroying the flocs can prevent clogging, and the generated micro- and nano-bubbles can increase the dissolved oxygen content in the water.

[0030] The liquid delivery device 2 includes a pump 22 for extracting water, a delivery pipe 24 connected to the pump 22, a first regulating valve 26, and a second regulating valve 25. The first end of the delivery pipe 24 is connected to the liquid passage chamber 45, and the second end of the delivery pipe 24 is connected to the second inlet pipe 15. The first regulating valve 26 is installed at the first end of the delivery pipe 24, and the second regulating valve 25 is installed at the second end of the delivery pipe 24.

[0031] The control device controls the liquid pump 22, the first regulating valve 26, and the second regulating valve 25. It is used to control the liquid pump 22 and the first regulating valve 26 to open and the second regulating valve 25 to close when the dissolved oxygen concentration in the water is below a first preset range and the turbidity is not above a second preset range.

[0032] Used to control the opening of the pumping pump 22 and the second regulating valve 25 and the closing of the first regulating valve 26 when the dissolved oxygen concentration in the water is not lower than a first preset range value and the turbidity is higher than a second preset range value, or

[0033] This is used to control the opening of the liquid pump, the first regulating valve 26, and the second regulating valve 25 when the dissolved oxygen concentration in the water is lower than a first preset range value and the turbidity is higher than a second preset range value.

[0034] Specifically, the liquid delivery device 2 also includes a liquid extraction pipe 21 connected to the liquid extraction pump 22, through which the liquid extraction pump 22 extracts water.

[0035] Furthermore, the detection probe 5 is installed on the outside of the liquid extraction tube 21 to monitor the dissolved oxygen concentration and turbidity of the water and feed it back to the control device;

[0036] By adopting the above design, this application can selectively control the liquid conveying device 2 and the gas conveying device 3 to deliver water and gas to the swirl device 1 and / or the aeration device 4 according to the dissolved oxygen concentration and turbidity of the water body, so as to meet the usage requirements under different working conditions.

[0037] The liquid delivery device 2 further includes a booster pump 23, a first flow rate gauge 27, and a second flow rate gauge 28. The booster pump 23 is connected between the liquid pump 22 and the delivery pipe 24. The first flow rate gauge 27 is installed at the first end of the delivery pipe 24 and is offset from the position of the first regulating valve 26. It is used to monitor the flow rate of the water flowing into the liquid passage chamber 45 and feed it back to the control device to control the booster pump 23 so that the flow rate of the water flowing into the liquid passage chamber 45 matches the preset flow rate of the water in the liquid passage chamber 45. The second flow rate gauge 28 is installed at the second end of the delivery pipe 24 and is offset from the position of the second regulating valve 25. It is used to detect the flow rate of the water flowing into the vortex cylinder 13 and feed it back to the control device to control the booster pump 23 so that the flow rate of the water flowing into the vortex cylinder 13 matches the preset flow rate of the water in the vortex cylinder 13.

[0038] By adopting the above design, the flow velocity of the water flowing into the liquid passage 45 and the flow velocity of the water flowing into the vortex tube 13 can be monitored in real time, and the flow velocity of the water flowing into the liquid passage 45 can be matched with the preset flow velocity of the water in the liquid passage 45, and the flow velocity of the water flowing into the vortex tube 13 can be matched with the preset flow velocity of the water in the vortex tube 13; the automation effect is good.

[0039] The gas delivery device 3 includes an air compressor 31, a gas delivery pipe 36 connected to the air compressor 31, a third regulating valve 33 and a fourth regulating valve 32. The first end of the gas delivery pipe 36 is connected to the ventilation chamber 46, the second end of the gas delivery pipe 36 is connected to the second air inlet pipe 11, the third regulating valve 33 is installed at the first end of the gas delivery pipe 36, and the fourth regulating valve 32 is installed at the second end of the gas delivery pipe 36.

[0040] The control device controls the air compressor 31, the third regulating valve 33, and the fourth regulating valve 32. It is used to control the air compressor 31 and the third regulating valve 33 to open and the fourth regulating valve 32 to close when the dissolved oxygen concentration in the water is below a first preset range and the turbidity is not above a second preset range.

[0041] Used to control the air compressor 31 and the fourth regulating valve 32 to open and the third regulating valve 33 to close when the dissolved oxygen concentration in the water is not lower than the first preset range value and the turbidity is higher than the second preset range value, or

[0042] This is used to control the air compressor 31, the third regulating valve 33, and the fourth regulating valve 32 to open when the dissolved oxygen concentration in the water is lower than the first preset range value and the turbidity is higher than the second preset range value.

[0043] By adopting the above design, the pressurized gas formed by the air compressor 31 can be transported to the ventilation chamber 46 through the first end of the air supply pipe 36 and to the swirl tube 13 through the second end of the air supply pipe 36, so as to provide the required gas to the swirl device 1 and the aeration device 4.

[0044] The gas delivery device 3 further includes a third flow meter 34 installed at the first end of the gas delivery pipe 36 and offset from the position of the third regulating valve 33, and a fourth flow meter 35 installed at the second end of the gas delivery pipe 36 and offset from the position of the fourth regulating valve 32.

[0045] By adopting the above design, the third velocity gauge 34 is used to monitor the flow rate of the gas flowing to the ventilation chamber 46, and the fourth velocity gauge 35 is used to monitor the flow rate of the gas flowing to the vortex tube 13 and feed it back to the control device to control the air compressor 31 so that the gas flow rate conforms to the preset flow rate of the gas flowing to the vortex tube 13 and the preset flow rate of the gas flowing to the ventilation chamber 46.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A microbubble generator combining swirl and aeration in parallel, with slow-release oxygen function, used for circulating water to be treated, characterized in that... The microbubble generator includes a swirl device, an aeration device, a liquid conveying device connected to the swirl device and the aeration device and capable of conveying water to the swirl device and / or the aeration device, a gas conveying device connected to the swirl device and the aeration device and capable of conveying gas to the swirl device and / or the aeration device, and a detection probe for monitoring the dissolved oxygen concentration and turbidity of the water to be treated. It also includes a control device for acquiring the dissolved oxygen concentration and turbidity of the water to be treated in real time and controlling the liquid conveying device to deliver water to the aeration device and / or swirl device according to the dissolved oxygen concentration and turbidity of the water to be treated, and controlling the gas conveying device to deliver gas to the aeration device and / or swirl device, so that the dissolved oxygen concentration and turbidity of the water body meet the first preset range value and the second preset range value respectively. The aeration device includes a horizontal cylindrical tube, a first liquid outlet pipe, and a microporous filter membrane connected inside the cylindrical tube. The microporous filter membrane divides the interior of the cylindrical tube into a liquid passage chamber located inside the microporous filter membrane and an air passage chamber located outside the microporous filter membrane. One end of the liquid passage chamber is connected to a liquid conveying device, and the other end of the liquid passage chamber is connected to the first liquid outlet pipe. The end of the first liquid outlet pipe away from the liquid passage chamber extends into the water body to be treated, for discharging the water treated by the aeration device into the water body to be treated. The gas conveying device is connected to the air passage chamber, and the microporous filter membrane is made of ORC material.

2. The microbubble generator as described in claim 1, which combines swirling and aeration in parallel and also has a slow-release oxygen function, is characterized in that... The swirling device includes a swirling cylinder, a second liquid inlet pipe, a second air inlet pipe, and a second liquid outlet pipe connected to the top of the swirling cylinder. One end of the second liquid inlet pipe is connected to a liquid conveying device, and the other end of the second liquid inlet pipe is connected to the swirling cylinder, which is used to guide the water entering the swirling cylinder to swirl along the inner wall of the swirling cylinder. One end of the second air inlet pipe is connected to a gas conveying device, and the other end of the second air inlet pipe is connected to the bottom of the swirling cylinder.

3. The microbubble generator as described in claim 2, which combines swirling and aeration in parallel and also has a slow-release oxygen function, is characterized in that... The liquid delivery device includes a pump for extracting water, a delivery pipe connected to the pump, a first regulating valve, and a second regulating valve. The first end of the delivery pipe is connected to a liquid passage chamber, and the second end of the delivery pipe is connected to a second inlet pipe. The first regulating valve is installed at the first end of the delivery pipe, and the second regulating valve is installed at the second end of the delivery pipe. The control device controls the liquid pump, the first regulating valve, and the second regulating valve. When the dissolved oxygen concentration in the water is below a first preset range and the turbidity is not above a second preset range, the control device opens the liquid pump and the first regulating valve while closing the second regulating valve. Used to control the liquid pump and the second regulating valve to open and the first regulating valve to close when the dissolved oxygen concentration in the water body is not lower than a first preset range value and the turbidity is higher than a second preset range value, or This is used to control the opening of the liquid pump, the first regulating valve, and the second regulating valve when the dissolved oxygen concentration in the water body is lower than a first preset range value and the turbidity is higher than a second preset range value.

4. The microbubble generator as described in claim 3, which combines swirling and aeration in parallel and also has a slow-release oxygen function, is characterized in that... The liquid delivery device further includes a booster pump, a first flow meter, and a second flow meter. The booster pump is connected between the liquid pump and the delivery pipe. The first flow meter is installed at the first end of the delivery pipe and is offset from the position of the first regulating valve. It is used to monitor the flow rate of the water flowing into the liquid passage chamber and feed it back to the control device to control the booster pump so that the flow rate of the water flowing into the liquid passage chamber matches the preset flow rate of the water in the liquid passage chamber. The second flow meter is installed at the second end of the delivery pipe and is offset from the position of the second regulating valve. It is used to detect the flow rate of the water flowing into the vortex tube and feed it back to the control device to control the booster pump so that the flow rate of the water flowing into the vortex tube matches the preset flow rate of the water in the vortex tube.

5. The microbubble generator as described in claim 2, which combines swirling and aeration in parallel and also has a slow-release oxygen function, is characterized in that... The gas delivery device includes an air compressor, a gas delivery pipe connected to the air compressor, a third regulating valve, and a fourth regulating valve. The first end of the gas delivery pipe is connected to the ventilation chamber, and the second end of the gas delivery pipe is connected to the second air inlet pipe. The third regulating valve is installed at the first end of the gas delivery pipe, and the fourth regulating valve is installed at the second end of the gas delivery pipe. The control device controls the air compressor, the third regulating valve, and the fourth regulating valve. When the dissolved oxygen concentration in the water is below a first preset range and the turbidity is not above a second preset range, the control device opens the air compressor and the third regulating valve while closing the fourth regulating valve. Used to control the air compressor and the fourth regulating valve to open and the third regulating valve to close when the dissolved oxygen concentration in the water body is not lower than a first preset range value and the turbidity is higher than a second preset range value, or This is used to control the air compressor, the third regulating valve, and the fourth regulating valve to open when the dissolved oxygen concentration in the water body is lower than the first preset range value and the turbidity is higher than the second preset range value.

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