Device for generating microbubbles

Abstract

The application discloses a device for generating micro bubbles, which comprises a generating cavity arranged below a liquid surface and provided with a micro bubble generating layer on at least a part of a contact surface between the generating cavity and the liquid, and an air supply pipeline connected with one end of the generating cavity and the other end of the air supply pipeline connected with an air supply device. The air in the generating cavity is made to pass through the micro bubble generating layer and form micro bubbles on the contact surface between the micro bubble generating layer and the liquid by increasing the air pressure in the generating cavity. The generating cavity is driven to move in the liquid and the air in the generating cavity moves synchronously with the generating cavity to cut the micro bubbles and make the micro bubbles enter the liquid. The application solves the technical problems of high energy consumption, high investment cost and poor micro bubble generating effect in the process of cutting the micro bubbles.

Description

Technical Field

[0001] This invention relates to the field of microbubble generation technology, and more particularly to an apparatus for generating microbubbles. Background Technology

[0002] The existence of micro- and nanobubbles was discovered as early as the 1960s and applied to imaging technology. After 2000, Japan took the lead in researching more properties and applications of micro- and nanobubbles, and discovered that micro- and nanobubbles have characteristics such as extremely slow rising speed in water, self-pressurization dissolution, and extremely high mass transfer efficiency (over 95%). They also have the characteristics of significantly improving gas solubility, large surface area, high interfacial potential, excellent flotation effect, reducing liquid flow resistance, and the ability of explosions in the microscopic bubble domain to break the chemical bonds of surrounding water molecules and generate free radicals.

[0003] For aquaculture, it can more than double the fish stocking density, significantly shorten the breeding cycle, and improve feed conversion rate. The air flotation property can also dissolve fish feces and residual fish feed in the water and float them to the surface, greatly reducing the levels of ammonia nitrogen and nitrite in the water, achieving zero antibiotic and zero tailings aquaculture. This not only increases production but also has great significance for fish food safety and environmental management.

[0004] For crop cultivation, micro-nano bubbles can increase rice yield by more than 50%, promote more developed root systems, and significantly improve lodging resistance. The principle is that plant roots need oxygen, and most soil microorganisms are aerobic. The more active the microorganisms, the stronger the soil fertility, and the more developed the root system, thus achieving increased yield. Using micro-nano bubble water to grow crops not only increases yield but also improves the soil environment.

[0005] For improving water quality, high dissolved oxygen levels are key to water treatment. The root cause of black and odorous water bodies is lack of oxygen. Replenishing oxygen allows the ecosystem to recover on its own, thus treating the water body.

[0006] In addition, micro- and nano-bubbles can reduce liquid sliding resistance, thus increasing the speed of ships.

[0007] Micro- and nano-bubbles are not limited to air and oxygen; they can also be used with gases such as carbon dioxide and ozone. High-concentration ozone-rich water bodies with a large contact area represent an advanced oxidation technology with significant applications in industry. Beyond industry, ozone-rich water bodies can also play a crucial role in food disinfection and sterilization. Furthermore, high-concentration carbon dioxide-rich water bodies can facilitate the industrialization of microalgae-based oil production. Micro- and nano-bubble technology is essentially a highly efficient gas-liquid mixing technology, breaking the conventional understanding that non-polar gases are poorly soluble in water. It is a fundamental process that will permeate various fields like electricity, bringing about technological breakthroughs.

[0008] Despite the crucial role of micro- and nano-bubbles, their widespread application in actual production has been limited, remaining primarily in experimental research. The core issue lies in the extremely high energy consumption of micro- and nano-bubble generators, resulting in increased production without corresponding increases in revenue. To date, the energy consumption problem of various generators remains unresolved. Most micro- and nano-bubble generators utilize high-speed water flow from pumps to cut the gas, and current design approaches are limited to recycling this high-speed water flow, failing to achieve a significant reduction in energy consumption.

[0009] Currently, there are various methods for generating microbubbles, such as ultrasonic methods, pressurized gas dissolution methods, Venturi jet methods, and rotary cutting methods. However, due to the limited number of bubbles generated by ultrasonic methods and the complex equipment and implementation difficulties required by pressurized gas dissolution methods, the Venturi jet method and rotary cutting method are the most commonly used microbubble generation methods. The principle of rotary cutting is essentially the same as that of pressurized gas dissolution methods: both use a high-speed rotating liquid to pressurize and dissolve gas, releasing pressure at the outlet to generate microbubbles. Compared to pressurized gas dissolution methods, rotary cutting reduces the implementation difficulty by eliminating complex pressurization equipment. Furthermore, compared to Venturi jet methods, the water flow in rotary cutting is rotating forward, resulting in a longer water-air fusion process and finer bubble sizes at the outlet. However, both the Venturi jet method and the rotary cutting method require large water pumps or dissolved air pumps (requiring a head of 20m to 40m and a water pressure of 0.2MPa to 0.5MPa). These two methods cannot generate microbubbles under low speed and low pressure conditions. Due to the limitations of the water pumps themselves, the water-to-air ratio cannot currently exceed 10:1 (i.e., generating 1 volume of microbubbles requires 10 volumes of high-speed water flow). Furthermore, both the Venturi tube and the rotary cutter accelerate the water flow by narrowing the tube diameter, ultimately resulting in a high-speed jet from the outlet. Therefore, generating microbubbles using either the Venturi tube or the rotary cutter requires enormous energy consumption, and the heat generated by the rotational friction of the water during the extrusion process is also a significant factor contributing to the high energy consumption. When using the Venturi jet method and the rotary cutting method, large vehicles (such as forklifts or cranes) are needed to transport the large water pumps or dissolved air pumps, making construction difficult. All of these problems significantly restrict the widespread application of microbubbles in actual production.

[0010] There is currently no effective solution to the problems of high energy consumption, high investment cost, and poor microbubble generation effect in the process of cutting microbubbles in related technologies.

[0011] Therefore, based on years of experience and practice in related industries, the inventor proposes a device for generating microbubbles to overcome the shortcomings of existing technologies. Summary of the Invention

[0012] The purpose of this invention is to provide a device for generating microbubbles. By pressurizing a gas, it is forced to pass through a microbubble generating material and form microbubbles at the interface between the microbubble generating material and the liquid. The device itself then cuts the generated microbubbles, thereby achieving the purpose of generating microbubbles. This process greatly reduces production energy consumption and saves costs because it does not require driving the liquid to move. Moreover, the device has a simple structure, is easy to operate, and has great economic benefits, making it suitable for widespread use.

[0013] This invention can be implemented using the following technical solutions:

[0014] This invention provides an apparatus for generating microbubbles. The apparatus includes a generating chamber disposed below the liquid surface, and a microbubble generating layer is disposed on at least a portion of the contact surface between the generating chamber and the liquid. One end of the generating chamber is connected to a pressure supply pipe, and the other end of the pressure supply pipe is connected to a gas supply device. By increasing the gas pressure in the generating chamber, the gas in the generating chamber passes through the microbubble generating layer and forms microbubbles on the contact surface between the microbubble generating layer and the liquid. The generating chamber is driven to move within the liquid, and the gas in the generating chamber moves synchronously with the generating chamber to cut the microbubbles, allowing the microbubbles to enter the liquid.

[0015] In a preferred embodiment of the present invention, the generating chamber is a cylindrical structure with both ends sealed by the microbubble generating layer. The axial direction of the generating chamber is arranged in the horizontal direction. A hollow shaft is arranged along the axial direction at the internal axis of the generating chamber. The hollow shaft has multiple air inlets that communicate with the generating chamber. The hollow shaft extends to the outside of the generating chamber and is connected to the first drive motor and the pressure supply pipe, respectively.

[0016] In a preferred embodiment of the present invention, annular first baffles are respectively provided on the outer wall of the generating cavity and at both ends of the generating cavity along the circumference of the generating cavity.

[0017] In a preferred embodiment of the present invention, an annular second baffle is provided on the outer wall of the generating cavity and at a position between the two first baffles along the circumference of the generating cavity, and the diameter of the second baffle is larger than the diameter of the first baffle.

[0018] In a preferred embodiment of the present invention, the device for generating microbubbles further includes a first mounting base and a first mounting frame. The bottom of the first mounting frame is fixed on the first mounting base. The first drive motor is disposed on the first mounting frame. The rotating shaft of the first drive motor is arranged in a horizontal direction and connected to one end of the hollow shaft through a self-aligning coupling. The other end of the hollow shaft is rotatably disposed on the first mounting frame through a bearing structure. The interior of the hollow shaft is connected to the pressure supply pipe through a bearing seat and a sealing pipe.

[0019] In a preferred embodiment of the present invention, the device for generating microbubbles includes a mounting plate capable of vibrating in a horizontal direction. The microbubble generating layer is located above the mounting plate to form the generating cavity between the microbubble generating layer and the mounting plate. The generating cavity is provided with an air inlet connected to the pressure supply pipe. A second drive motor is provided below the mounting plate and is fixed at the bottom center of the mounting plate. The motor shaft of the second drive motor is perpendicular to the surface of the mounting plate, which is arranged in a horizontal direction.

[0020] In a preferred embodiment of the present invention, the second drive motor is a vibration motor.

[0021] In a preferred embodiment of the present invention, the device for generating microbubbles further includes a second mounting base and a second mounting frame. The bottom of the second mounting frame is fixed to the second mounting base. The mounting plate is a flat plate structure arranged in a horizontal direction, and the middle position of each edge of the mounting plate is connected to the second mounting frame by a spring. Below the liquid surface, the spring is in a horizontal state.

[0022] In a preferred embodiment of the present invention, the mounting plate is square or circular.

[0023] In a preferred embodiment of the present invention, the device for generating microbubbles includes a hollow column with a top seal arranged vertically and a bottom connected to the pressure supply pipe. The pressure supply pipe extends into the interior of the hollow column. A third drive motor capable of rotating the hollow column is provided at the bottom of the hollow column. A plurality of generating chambers communicating with the interior of the hollow column are connected to the hollow column. The top of each generating chamber is covered with a microbubble generating layer.

[0024] In a preferred embodiment of the present invention, the plurality of generating cavities are arranged in multiple layers in the vertical direction, and adjacent generating cavities in each layer are distributed at intervals along the circumference of the hollow column.

[0025] In a preferred embodiment of the present invention, the cross-section of the generating cavity is rectangular.

[0026] In a preferred embodiment of the present invention, the device for generating microbubbles further includes a third mounting base, the third drive motor is an external rotor motor, the third drive motor is disposed on the top of the third mounting base, the bottom end of the hollow column is connected to the external rotor of the third drive motor, and the pressure supply pipe extends from bottom to top through the central hole of the third mounting base and the external rotor of the third drive motor into the interior of the hollow column, and the height of the pressure supply pipe extending into the hollow column is lower than the height of the generating chamber.

[0027] In a preferred embodiment of the present invention, the microbubble generating layer is a cathode or anode that generates microbubbles on the surface of the material during the electrolysis process.

[0028] As described above, the features and advantages of this invention are: a microbubble generating layer is provided on at least a portion of the contact surface between the generating chamber and the liquid; during operation, the generating chamber and the microbubble generating layer are in a state of synchronous movement, while the liquid is in a static state, thereby cutting the microbubbles generated on the contact surface between the microbubble generating layer and the liquid to generate microbubbles; since the microbubble generating layer no longer consumes additional energy after obtaining the speed required for movement, and the energy required to drive the gas continuously entering the microbubble generating material is extremely low, this invention can not only achieve the purpose of generating microbubbles, but also effectively reduce production energy consumption and save production costs, and can quickly generate a large number of microbubbles with uniform particle size, which has great economic benefits and is suitable for widespread use. Attached Figure Description

[0029] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0030] in:

[0031] Figure 1 This is one of the structural schematic diagrams of the device for generating microbubbles according to the present invention.

[0032] Figure 2 This is a second schematic diagram of the device for generating microbubbles according to the present invention.

[0033] Figure 3 This is the third schematic diagram of the device for generating microbubbles according to the present invention.

[0034] Figure 4 :for Figure 3 A top view of the device used to generate microbubbles.

[0035] The reference numerals in the accompanying drawings of this invention are:

[0036] 1. Bubble generation chamber; 2. Microbubble generation layer;

[0037] 3. Pressure supply pipeline; 4. Air pump;

[0038] 5. First filter; 6. Second filter;

[0039] 7. Flow meter; 8. Adjustment knob;

[0040] 9. Pressure gauge; 10. Hollow shaft;

[0041] 1001. Air intake port; 11. First baffle plate;

[0042] 12. Second baffle; 13. First mounting base;

[0043] 14. First mounting bracket; 15. Self-aligning coupling;

[0044] 16. First sealing ring; 17. Sealing tube;

[0045] 18. First drive motor; 19. Mounting plate;

[0046] 20. Second drive motor; 21. Spring;

[0047] 22. Second mounting base; 23. Second mounting bracket;

[0048] 24. Third drive motor; 25. Third mounting bracket;

[0049] 26. Hollow column. Detailed Implementation

[0050] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0051] like Figures 1 to 4As shown, the present invention provides an apparatus for generating microbubbles. The apparatus includes a generating chamber 1 and a pressure supply pipe 3. The pressure supply pipe 3 supplies gas into the generating chamber 1 to create a certain gas pressure within the chamber. The generating chamber 1 is positioned below the liquid surface. A microbubble generating layer 2 is formed on at least a portion of the contact surface between the generating chamber 1 and the liquid. One end of the generating chamber 1 is connected to the pressure supply pipe 3, and the other end of the pressure supply pipe 3 is located above the liquid surface and connected to a gas supply device. By increasing the gas pressure within the generating chamber 1, the gas in the generating chamber 1 passes through the microbubble generating layer 2 and forms microbubbles on the contact surface between the microbubble generating layer 2 and the liquid. The generating chamber 1 is driven to move within the liquid, and the gas within the generating chamber 1 moves synchronously with the generating chamber 1 to cut the microbubbles, allowing them to enter the liquid. The generating chamber 1 can, but is not limited to, circumferential rotation, and can also employ various motion forms (such as left-right swinging), as long as it can rapidly cut the microbubbles on the contact surface between the microbubble generating layer 2 and the liquid.

[0052] This invention provides a microbubble generating layer 2 on at least a portion of the contact surface between the generating chamber 1 and the liquid. During operation, the generating chamber 1 and the microbubble generating layer 2 move synchronously, while the liquid remains stationary. This cuts the microbubbles generated on the contact surface between the microbubble generating layer 2 and the liquid, thus generating microbubbles. Since the microbubble generating layer 2 no longer consumes additional energy after reaching the required speed, and the energy required to drive the gas continuously entering the microbubble generating material is extremely low, this invention not only achieves the purpose of generating microbubbles but also effectively reduces production energy consumption and saves production costs. Furthermore, it can rapidly generate a large number of microbubbles with uniform particle size, resulting in significant economic benefits and making it suitable for widespread use. Although micro- and nano-bubbles can also be cut through the movement of liquid, the movement of the microbubble generating layer 2 while the liquid remains stationary greatly reduces energy consumption compared to the movement of the liquid outside the microbubble generating layer 2. If the movement of liquid is used to cut the microporous bubbles generated on the stationary microbubble generating layer 2, the energy required to accelerate the liquid to the same speed is far greater than the energy required for the microbubble generating layer 2 to accelerate the gas to the same speed.

[0053] In this invention, the thickness of the microbubble generating layer 2 is sufficient to support the movement of the generating chamber 1. The thinner the microbubble generating layer 2, the smaller the air resistance and the better the gas permeability of the microbubble generating layer 2. There are no restrictions on the size of the generating chamber 1. The larger the volume of the generating chamber 1, the larger the surface area of ​​the microbubble generating layer 2 and the greater the air flow, but the greater the frictional resistance it experiences during rotation.

[0054] Furthermore, the pore size of the microbubble generating layer 2 is less than 5 μm.

[0055] Furthermore, the microbubble generating layer 2 is not limited to being made of materials with micropores; it can also be a cathode or anode that generates microbubbles on the surface of a material during electrolysis.

[0056] Furthermore, the gas supply device can be, but is not limited to, an air pump, which can supply gas into the generating chamber 1 and create a certain pressure within the generating chamber 1.

[0057] Furthermore, such as Figures 1 to 3 As shown, an air pump 4, a first filter 5, and a second filter 6 are sequentially arranged along the gas flow direction on the pressure supply pipeline 3. All three are located above the liquid surface. The pore size of the filter element in the second filter 6 is smaller than that of the filter element in the first filter 5 and the pore size of the microbubble generating layer 2. The first filter 5 and the second filter 6 filter out dust from the gas. The first filter 5 removes large-diameter dust particles, while the second filter 6 removes small-diameter dust particles, ensuring that the microbubble generating layer 2 will not be clogged by dust during long-term operation, thus extending the service life of the device. Furthermore, the filter elements of both the first filter 5 and the second filter 6 are easily replaceable consumables and can be replaced periodically. The gas in generating chamber 1 can pass through the microbubble generating layer 2 through the centrifugal force generated by the rotation of generating chamber 1, creating a negative pressure within generating chamber 1 to allow gas from the gas source to enter and replenish it. However, the smaller the pores in the microbubble generating layer 2, the greater the air resistance. If the centrifugal force generated by the rotation of the gas is insufficient to pass through the microbubble generating layer 2, gas can be pumped into generating chamber 1 by air pump 4 to increase the air pressure within generating chamber 1, thereby increasing the penetrating power of the gas and ensuring that the gas can smoothly pass through the microbubble generating layer 2. Alternatively, the centrifugal force can be increased by increasing the rotation speed of generating chamber 1 to make it easier for the gas to penetrate, but this method requires greater energy consumption compared to adding air pump 4.

[0058] Furthermore, such as Figures 1 to 3 As shown, a flow meter 7 is installed on the pressure supply pipe 3 upstream of the air pump 4, and a pressure gauge 9 is installed on the pressure supply pipe 3 downstream of the second filter 6. The flow meter 7 is equipped with an adjustment knob 8 to control the gas flow rate. The flow meter 7 allows for real-time monitoring of the gas flow rate, and the adjustment knob 8 can be adjusted according to actual conditions to control the gas flow rate per unit time, thereby adjusting the particle size of the microbubbles. The flow meter 7 can be, but is not limited to, a glass rotor flow meter.

[0059] In an optional embodiment of the present invention, such as Figure 1As shown, the generating chamber 1 is a cylindrical structure with both ends sealed, enclosed by a microbubble generating layer 2. The generating chamber 1 is axially positioned horizontally. A hollow shaft 10 is positioned axially at the center of the generating chamber 1, and multiple air inlets 1001 communicating with the generating chamber 1 are opened on the hollow shaft 10. The hollow shaft 10 extends to the outside of the generating chamber 1 and is connected to the first drive motor 18 and the pressure supply pipe 3, respectively. Because the generating chamber 1 is horizontally positioned, its length is not limited by water depth; even in shallow water environments, the length of the generating chamber 1 can be arbitrarily adjusted. Of course, if the length of the generating chamber 1 is too long, it will lead to poor structural stability, but this problem is not considered in this application.

[0060] In this embodiment, since the generating chamber 1 is arranged in the horizontal direction, it overcomes the problem that the large water pressure difference between the upper and lower ends of the generating chamber 1 when it is arranged in the vertical direction leads to inconsistent air output and bubble particle size at the upper and lower ends. When the generating chamber 1 is arranged in the horizontal direction, the pressure difference between the upper and lower parts of the generating chamber 1 depends on the diameter of the generating chamber 1.

[0061] Furthermore, such as Figure 1 As shown, the diameter of generating cavity 1 is much smaller than its axial length. Specifically, the diameter of generating cavity 1 is approximately 10 cm, and its axial length is greater than 1 m.

[0062] In this embodiment, as Figure 1 As shown, annular first baffles 11 are respectively arranged on the outer wall of the generating chamber 1 at both ends of the generating chamber 1 along the circumference of the generating chamber 1. The outer diameter of the first baffles 11 is larger than the diameter of the generating chamber 1. When the generating chamber 1 rotates, it will cause the nearby water to rotate and be thrown outward, forming a negative pressure area near the microbubble generating layer 2. The formation of the negative pressure area will cause the water on the left and right sides of the generating chamber 1 to replenish the negative pressure area, squeezing the micro-nano bubbles that have just detached from the microbubble generating layer 2. This causes some of the cut-out micro-nano bubbles to combine and form larger bubbles. The negative pressure is the greatest at the position close to the outer wall of the microbubble generating layer 2, where the cut-out micro-nano bubbles are squeezed into larger bubbles. Moreover, the water flow on the left and right sides will create a countercurrent at the middle position outside the microbubble generating layer 2, making it easier for them to combine into large bubbles. After setting up two first baffles 11, the water flow can only compress the generated micro- and nano-bubbles in the area outside the two first baffles 11. At this time, the micro- and nano-bubbles have diffused into a larger body of water, the concentration is greatly reduced, and the proportion of compressed into large bubbles is also greatly reduced, thus greatly reducing the impact of water flow on micro- and nano-bubbles. Among them, the larger the diameter of the first baffle 11, the better the blocking effect on the water flow. However, because the water enclosed between the two first baffles 11 will be driven to rotate with the generating chamber 1, there will be a disadvantage of increased energy consumption. Therefore, a balance needs to be struck between the particle size of the generated bubbles and energy consumption.

[0063] Furthermore, such as Figure 1 As shown, a circular second baffle 12 is arranged circumferentially around the outer wall of the generating chamber 1, located between the two first baffles 11, and the diameter of the second baffle 12 is larger than the diameter of the first baffles 11. The second baffle 12 is located in the middle of the outer wall of the generating chamber 1. Since the diameter of the two first baffles 11 cannot be increased due to power consumption considerations, the negative pressure formed outside the two first baffles 11 will squeeze the water flow, causing the water flow to collide at the middle position of the two first baffles 11, resulting in an increase in the proportion of large bubbles generated. The addition of the second baffle 12 between the two first baffles 11 can effectively prevent the water flow from colliding. The setting of the second baffle 12, apart from increasing the friction between itself and the water, will not lead to a significant increase in power consumption.

[0064] Specifically, such as Figure 1 As shown, the device for generating microbubbles also includes a first mounting base 13 and a first mounting bracket 14. The bottom of the first mounting bracket 14 is fixed to the first mounting base 13 by screws and nuts. The first drive motor 18 is fixedly mounted on the top of the first mounting bracket 14. The shaft of the first drive motor 18 is arranged horizontally and connected to one end of the hollow shaft 10 through a self-aligning coupling 15. The other end of the hollow shaft 10 is rotatably mounted on the first mounting bracket 14 through a bearing structure. Circular first sealing rings 16 are respectively fitted on the hollow shaft 10 and on both sides of the bearing structure. The interior of the hollow shaft 10 is connected to the pressure supply pipe 3 through a bearing seat and a sealing tube 17 to ensure a good sealing effect.

[0065] In an optional embodiment of the present invention, such as Figure 2As shown, the device for generating microbubbles includes a mounting plate 19 capable of vibrating horizontally. A microbubble generating layer 2 is located above the mounting plate 19, forming a generating cavity 1 between the microbubble generating layer 2 and the top surface of the mounting plate. An air inlet connected to a pressure supply pipe 3 is provided on the generating cavity 1. A second drive motor 20 is located below the mounting plate 19 and is fixed to the bottom center of the mounting plate 19. The motor shaft of the second drive motor 20 is perpendicular to the surface of the horizontally positioned mounting plate 19. The vibration force generated by the second drive motor 20 is distributed on the vertical plane of the motor shaft. The second drive motor 20 is mounted perpendicularly to the mounting plate 19 along its output shaft. The centrifugal force generated by the eccentric block on the output shaft of the second drive motor 20, in conjunction with a spring 21, drives the entire mounting plate 19 to produce a high-frequency reciprocating motion in the horizontal direction. During the high-frequency reciprocating motion of the mounting plate 19, gas permeates from the microbubble generating layer 2 and cuts to form micro-nano bubbles. As the micro-nano bubbles gradually increase in size due to capillary adsorption force and / or surface tension between the bubbles and the microporous material layer 2, and aggregate with surrounding bubbles, the micro-nano bubbles need to be cut by the water body during the high-frequency reciprocating motion of the mounting plate 19 in the horizontal direction before they become large bubbles. The micro-nano bubbles enter the water body in the form of micro-nano bubbles, carrying their original upward kinetic energy. If the mounting plate 19 is not vibrating horizontally in a still water body, the bubbles emerging from the microbubble generating layer 2 are sparse and rise rapidly. After the mounting plate 19 vibrates horizontally, the bubbles become dense and rise slowly because they are cut into micro- and nano-bubbles. Therefore, in this embodiment, it has a better effect in flowing water. The micro- and nano-bubbles formed are washed away by the water flow, which dilutes and diffuses the micro- and nano-bubbles. The inertial tendency of the micro- and nano-bubbles to rise to the water surface is destroyed due to the continuous generation of micro- and nano-bubbles. The micro- and nano-bubbles dispersed into the surrounding larger water body will be diffused in the water and rise in an extremely slow state.

[0066] In this embodiment, as the second drive motor 20 drives the mounting plate 19 to vibrate, it can be clearly observed that the bubbles generated by the microbubble generating layer 2 begin to become smaller and denser. As the vibration frequency increases, the bubbles become even smaller and denser. After the vibration frequency increases to a certain value, the bubbles begin to grow larger and sparser due to collisions and aggregation. As the frequency increases further, the bubbles become even larger and sparser. Therefore, micro- and nano-bubbles of different particle sizes can be obtained by adjusting the vibration frequency of the mounting plate 19. Different microbubble generating materials result in different initial bubble particle sizes. Even for the same microbubble generating material, the initial bubble particle size of each microbubble generating material in the same batch may vary slightly. It is necessary to adjust the vibration frequency of the second drive motor 20 to ensure that the generated bubbles are within the required suitable range.

[0067] Furthermore, the second drive motor 20 can be, but is not limited to, a vibration motor. In this invention, the centrifugal force generated by the high-speed rotation of the eccentric block in the vibration motor, combined with the horizontally placed spring 21, drives the mounting plate 19 to vibrate in the horizontal direction. This differs from the conventional method of using a vibration motor, where the spring is placed vertically, producing up-and-down shaking to achieve the effect of vibrating and screening objects. This is an innovative method of using a vibration motor in accordance with the needs of this invention.

[0068] Specifically, such as Figure 2 As shown, the device for generating microbubbles also includes a second mounting base 22 and a second mounting bracket 23. The bottom of the second mounting bracket 23 is fixed to the second mounting base 22 by screws and nuts. The mounting plate 19 is a square or circular flat plate structure arranged horizontally. Steel sheets are welded to the middle of each edge of the mounting plate 19, and the steel sheets extend vertically downwards from the mounting plate 19. A spring 21 is provided on each edge of the mounting plate 19 (the spring 21 is connected to the mounting plate 19 by screws and nuts). The other end of the spring 21 is connected to the second mounting bracket 23. Below the liquid surface, the spring 21 is in a horizontal state. Of course, the mounting plate 19 can also be polygonal.

[0069] In an optional embodiment of the present invention, such as Figure 3 As shown, the device for generating microbubbles includes a hollow column 26 arranged vertically. The top of the hollow column 26 is sealed, and the bottom is connected to a pressure supply pipe 3, which extends into the interior of the hollow column 26. A third drive motor 24, capable of rotating the hollow column 26, is installed at the bottom of the hollow column 26. Multiple generating chambers 1, which communicate with the interior of the hollow column 26, are connected to the hollow column 26. Each generating chamber 1 is covered with a microbubble generating layer 2. During use, the third drive motor 24 drives the hollow column 26 to rotate. Each generating chamber 1 and the microbubble generating layer 2 rotate synchronously with the hollow column 26. Gas in each generating chamber 1 emerges from the microbubble generating layer 2 and is cut by the water. Driven by its own upward force, the gas enters the water, forming micro-nano bubbles.

[0070] Furthermore, such as Figure 3 , Figure 4 As shown, multiple generating cavities 1 are arranged in multiple layers in the vertical direction, and each generating cavity 1 in each layer is spaced apart and evenly distributed along the circumference of the hollow column 26.

[0071] Furthermore, the cross-section of the generating chamber 1 (i.e., the cross-section of the microbubble generating layer 2) can be, but is not limited to, spaced rectangles. If the generating chamber 1 is a complete annular ring arranged circumferentially around the hollow column 26 outside the hollow column 26, it has its own disadvantages: the complete annular ring is prone to causing the micro- and nano-bubbles generated by the inner ring of the microbubble generating layer 2 to be thrown outward due to centrifugal force during rotation (i.e., driving the micro- and nano-bubbles generated by the inner ring of the microbubble generating layer 2 to move towards the outer ring of the microbubble generating layer 2) and collide with and aggregate with the micro- and nano-bubbles produced by the outer ring of the microbubble generating layer 2. If this process continues, a large proportion of large bubbles will be formed. Therefore, in an optional embodiment of the present invention, adjacent microbubble generating layers 2 of the same layer can be arranged at intervals, which helps to shorten the continuous process of collision and aggregation, and widely diffuse into the water before forming large bubbles with a diameter greater than 100 μm, greatly reducing the probability of collision.

[0072] Specifically, such as Figure 3 , Figure 4 As shown, the device for generating microbubbles also includes a third mounting base 25, which is a disc-shaped structure arranged in a horizontal direction. The third drive motor 24 is an external rotor motor, which is fixedly mounted on the top of the third mounting base 25. The bottom end of the hollow column 26 is connected to the external rotor of the third drive motor 24. The pressure supply pipe 3 passes through the central hole of the third mounting base 25 and the external rotor of the third drive motor 24 from bottom to top and extends into the interior of the hollow column 26. The height of the pressure supply pipe 3 extending into the hollow column 26 is lower than the height of the generating chamber 1, so that the gas delivered to the hollow column 26 through the pressure supply pipe can smoothly enter each generating chamber 1, and the gas itself has upward kinetic energy.

[0073] The particle size of the microbubbles generated by this invention can be adjusted according to actual needs. Four factors determine the particle size of the microbubbles: First, the pore size and permeability of the microbubble generating layer 2. Different materials have different pore sizes and permeability, and even the same material can have fluctuating parameters depending on the actual usage environment. Second, the rotational speed during microbubble cutting. Higher rotational speed results in smaller microbubble particle sizes, but this is also affected by the material's permeability. If the microbubble generating layer 2 has large pores, thin walls, and good permeability, the increased rotational speed leads to increased centrifugal force of the rotating gas, resulting in larger particle sizes. Third, the air pressure inside the generating chamber 1, which can be controlled by the air pump 4. Higher air pressure results in higher air output and larger microbubble particle sizes, and vice versa. Fourth, the adjusting knob 8 on the flow meter 7 adjusts the air output by changing the system's air resistance, thereby adjusting the microbubble particle size.

[0074] The features and advantages of the device for generating microbubbles according to the present invention are as follows:

[0075] I. In the working state of this device for generating microbubbles, the generating chamber 1 and the microbubble generating layer 2 are in a state of synchronous movement, while the liquid is in a state of stillness. This cuts the microbubbles generated at the contact surface between the microbubble generating layer 2 and the liquid, thus generating microbubbles. Since the microbubble generating layer 2 no longer consumes additional energy after reaching the required speed, and the energy required to move the continuously entering gas in the microbubble generating material is extremely low, this invention not only achieves the purpose of generating microbubbles but also effectively reduces production energy consumption and saves production costs. Furthermore, it can rapidly generate a large number of microbubbles with uniform particle size, resulting in significant economic benefits and making it suitable for widespread use.

[0076] Second, the weight and volume of the device for generating microbubbles are significantly reduced compared to existing microbubble generators. The power equipment used in this invention is an electric motor, and the weight of a 1KW motor is less than 0.5 kg. Most specifications of this device require a power of less than 1KW. The microbubble generating material is also a lightweight material. The weight of this invention mainly comes from the mounting base and other supporting equipment. Therefore, the weight of the entire device can be controlled within 10 kg, and the volume of the entire device can be within 30 cm in diameter and 120 cm in height. In actual use, it can be installed manually.

[0077] Third, the device for generating microbubbles can be adjusted in volume according to actual needs, thereby controlling the amount of microbubbles generated. The entire device can be miniaturized, and the power equipment uses a low-power micro motor. Other parts can also be reduced accordingly, thus greatly expanding the application fields of microbubbles. For example, it can be used in the household and civilian fields, where people can make and drink high-oxygen water and high-hydrogen water to ensure their health. In addition, it can also be used to make ozone water for the preservation of vegetables, fruits, and meats, and to remove pesticide residues.

[0078] Fourth, the device for generating microbubbles has a simple structure, is easy to operate, and uses industrial finished products as raw materials, making it suitable for large-scale production. In addition, the invention has low energy consumption and low power consumption; the device only requires about 30 watts of power to generate microbubbles. It can be powered by solar panels and can produce microbubbles in fields, rivers, and lakes. Microbubbles have been proven to have a significant effect on increasing crop yields and treating river sewage, making full use of sunlight, air, and water. This effect is impossible to achieve with existing rotary cutting methods.

[0079] V. The device for generating microbubbles produces microbubbles with high uniformity in particle size distribution. Existing devices for generating microbubbles produce microbubbles with particle size distributions ranging from nanometers to micrometers (1 nanometer to 200 micrometers). In contrast, the uniformity of microbubble particle size in this invention depends on the uniformity of the pore size distribution of the microbubble generating material. Currently, the microbubble generating material has excellent quality, resulting in microbubbles with a highly uniform particle size range.

[0080] VI. The device for generating microbubbles uses the movement of microbubble generating materials to rotate the gas and form a high-speed airflow that cuts the liquid. This shift in thinking achieves a reduction in energy consumption of more than 100 times. Moreover, with improvements to the device, there is still room for further improvement. When energy consumption is no longer the bottleneck for micro-nano bubble generation, the changes that micro-nano bubbles bring to various industries will have extraordinary significance.

[0081] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. An apparatus for generating microbubbles, characterized in that, The device for generating micro-bubbles comprises a generating cavity, which is arranged below the liquid surface and is provided with a micro-bubble generating layer on at least part of the contact surface between the generating cavity and the liquid, one end of a pressure supply pipeline is connected with the generating cavity, the other end of the pressure supply pipeline is connected with a gas supply device, the gas in the generating cavity is made to pass through the micro-bubble generating layer and form micro-bubbles on the contact surface between the micro-bubble generating layer and the liquid by increasing the gas pressure in the generating cavity; The generating cavity is driven to move in the liquid, and the gas in the generating cavity moves synchronously with the generating cavity to cut the micro-bubbles and make the micro-bubbles enter the liquid; The device for generating micro-bubbles comprises a mounting plate, a mounting base and a mounting frame, which can vibrate in the horizontal direction, the micro-bubble generating layer is arranged above the mounting plate to form the generating cavity between the micro-bubble generating layer and the mounting plate, the generating cavity is provided with an air inlet connected with the pressure supply pipeline, the bottom center of the mounting plate is fixedly provided with a vibration motor, the motor shaft of the vibration motor is perpendicular to the plate surface of the mounting plate arranged in the horizontal direction, so that the vibration force generated by the vibration motor is distributed on the vertical surface of the motor shaft; The bottom of the mounting frame is fixed to the mounting base, the mounting plate is a flat plate structure arranged in the horizontal direction, and the mounting plate is connected with the mounting frame through a spring, the spring is in the horizontal state below the liquid surface, and the centrifugal force generated by the eccentric block on the output shaft of the vibration motor drives the whole mounting plate to generate high-frequency reciprocating motion in the horizontal direction under the cooperation of the spring.

2. The device for generating fine bubbles according to claim 1, wherein The mounting plate is square or circular.

3. The device for generating fine bubbles according to claim 1, wherein The micro-bubble generating layer is a cathode or anode that generates micro-bubbles on the surface of a material in an electrolysis process.

Images