Multi-purpose micro-nano bubble generator and flotation application device

Abstract

The present invention discloses a multi-field micro-nano bubble generator and an air flotation application device. The micro-nano bubble generator includes: a vibrating bubble mechanism, the vibrating bubble mechanism includes a bubble flow channel, the bubble flow channel has an inlet, the bubble flow channel has a peripheral wall, and a plurality of shear holes are provided on the peripheral wall, and the aperture range of a single shear hole is between 0.001-0.5mm; the vibrating bubble mechanism also includes a vibrating body capable of simple harmonic oscillation; a power mechanism. This micro-nano bubble generator makes full use of the hydraulic impact force that may fluctuate in the pipeline, the mechanical vibration of the vibrating body, the micropore shear force, etc., and especially utilizes the repeated impact brought by simple harmonic oscillation, and can generate micro-nano bubbles under low energy consumption conditions. In the fields of environment, biology, and chemical industry (for example, when applied to air flotation in sewage treatment), the effect is more significant.

Description

Technical Field

[0001] The present invention relates to the field of bubble manufacturing equipment, and more specifically, to a micro-nano bubble generator that generates micro-nano bubbles and can be applied to multiple fields, and an air flotation application device having the same. Background Art

[0002] Micro-nano bubbles generally refer to bubbles with a particle size of less than 100 μm, with their diameter distribution mostly ranging from tens of nanometers to hundreds of microns. Micro-nano bubbles float slowly in water and remain there for a long time. During the floating process, they continuously shrink until they disappear or burst. During the shrinkage process of micro-nano bubbles, the internal pressure of the bubbles increases, and at the moment of bursting, reactive oxygen species such as hydroxyl groups and free radicals are generated. At the same time, due to their smaller particle size, micro-nano bubbles provide a larger gas-liquid contact area. As their internal pressure increases during the continuous shrinkage process, the efficiency of gas-liquid mass transfer can be significantly improved. Therefore, they have broad application prospects in environmental protection industries such as ozone catalytic oxidation, disinfection, flotation, and black and odorous water treatment, as well as in the pharmaceutical and chemical industries.

[0003] Currently, common methods for generating micro- and nano-bubbles include hydraulic shearing, mechanical fragmentation, pressurized dissolved air, and membrane methods. Hydraulic shearing increases local shear force through narrow slits or hydraulic rotation, thereby cutting bubbles and producing micro- and nano-bubbles. Mechanical fragmentation breaks up bubbles through stirring and ultrasonic methods. Pressurized flotation dissolves gas in a liquid under high pressure and releases it under low pressure, where the gas dissolves from the liquid to form micro- and nano-bubbles. All of these methods of generating micro- and nano-bubbles incur high energy consumption. Bubbles generated using porous membranes often have larger particle sizes due to surface tension and adhesion.

[0004] In summary, in practical applications, micro-nano bubbles have many advantages such as high mass transfer efficiency and long residence time. However, the current methods for generating micro-nano bubbles have problems such as high energy consumption or large bubble particle size. Summary of the Invention

[0005] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention provides a multi-application micro-nano bubble generator. Some embodiments can generate micro-nano bubbles under low-energy operating conditions to enhance gas-liquid mass transfer. This allows the micro-nano bubble production to be controlled by adjusting the gas and liquid flow rates, adapting to the needs of various application conditions.

[0006] The present invention also aims to provide an air flotation application device having the above-mentioned micro-nano bubble generator.

[0007] According to an embodiment of the present invention, a micro-nano bubble generator for multi-field use includes: a vibrating bubble generating mechanism, wherein the vibrating bubble generating mechanism includes a bubble flow channel, the bubble flow channel has an inlet, the bubble flow channel has a peripheral wall, and a plurality of shear holes are provided on the peripheral wall, and the aperture range of a single shear hole is between 0.001-0.5 mm; the vibrating bubble generating mechanism also includes a vibrating body, and the vibrating bubble generating mechanism is configured so that the vibrating body can perform simple harmonic vibration, and the position of the vibrating body satisfies at least one of the following conditions: connected to the peripheral wall of the bubble flow channel and driving the peripheral wall to perform simple harmonic vibration to repeatedly squeeze the liquid with bubbles, and located in the bubble flow channel to repeatedly squeeze the liquid with bubbles; a power mechanism, wherein the power mechanism is connected to the liquid inlet pipe and the air inlet pipe, and the power mechanism is used to inhale the liquid in the liquid inlet pipe and the gas in the air inlet pipe, and transport the liquid containing bubbles toward the vibrating bubble generating mechanism.

[0008] The multi-field micro-nano bubble generator according to the embodiment of the present invention makes full use of the hydraulic impact force, mechanical vibration of the vibrating body, micropore shear force, etc. that may fluctuate in the pipeline, and in particular utilizes the repeated impact caused by simple harmonic vibration. Thus, it only needs to input gas and liquid into the system in the power mechanism and give a certain amount of kinetic energy to produce a milky white micro-nano bubble mixture. Therefore, this micro-nano bubble generator can produce micro-nano bubbles under low energy consumption conditions. The micro-nano bubbles produced by this micro-nano bubble generator of the present application have a small particle size, a large specific surface area, and a greatly increased gas content compared to large bubbles. Such micro-nano bubbles have a good flotation effect and are more effective in the fields of environment, biology, and chemical industry (for example, when used for flotation in sewage treatment).

[0009] In some embodiments, the bubble flow channel includes a first bubble flow channel, the peripheral wall of the first bubble flow channel includes a corrugated plate; the vibrating body includes a first spring, the first spring is located in the first bubble flow channel and connected to the corrugated plate; the natural frequency f of the first spring is ≥5Hz.

[0010] Specifically, the corrugated plate has crests and troughs, and the shear holes are provided on the corrugated plate. The shear holes are located at the crests and / or troughs of the corrugated plate.

[0011] Optionally, the peripheral wall of the first bubbling channel includes two opposite corrugated plates, and a plurality of the first springs are connected between the two corrugated plates.

[0012] In other embodiments, the bubble flow channel includes a second bubble flow channel, and the portion of the peripheral wall of the second bubble flow channel that is opposite to the inlet is a baffle. The vibrating body also includes: a piston, which is slidably fitted in the second bubble flow channel, and the piston slides back and forth between the inlet and the baffle. An active cavity is defined in the second bubble flow channel between the baffle and the piston, and the shear hole is connected to the active cavity. A through hole for liquid flow is provided on the piston; a second spring, the two ends of the second spring are respectively connected to the baffle and the piston, and the natural frequency f of the second spring is ≥5Hz.

[0013] Specifically, the vibration foaming mechanism also includes: a blocking tube, which is arranged in the active cavity and connected to the blocking plate, and the blocking tube is open toward one side of the piston; the shear hole is located outside the blocking tube, and the through hole on the piston is arranged opposite to the blocking tube, and the blocking tube is closed when the piston abuts against the blocking tube.

[0014] In some embodiments, the vibration bubbling mechanism further includes a changing channel located upstream of the bubbling flow channel, and the flow area of ​​the changing channel gradually increases in the direction toward the inlet.

[0015] Specifically, the vibration bubble mechanism also includes a collecting pipe, which includes: a supporting tube, which is a circular tube and is connected to the peripheral wall of the bubble flow channel; a conical tube, which is coaxially arranged in the supporting tube, and the diameter of the conical tube gradually decreases in the direction toward the inlet to form the changing channel, and the conical tube is connected to the supporting tube at one end adjacent to the inlet.

[0016] In some embodiments, the micro-nano bubble generator further includes: a gas-liquid mixing mechanism, which is connected to the outlet end of the power mechanism, and a spiral internal component is provided in the gas-liquid mixing mechanism to perform secondary mixing of gas and liquid, and the gas-liquid mixing mechanism is connected to the bubble flow channel.

[0017] An air flotation application device according to an embodiment of the present invention includes a reactor and the aforementioned multi-application micro-nano bubble generator, wherein the liquid discharged from the micro-nano bubble generator flows into the reactor. The micro-nano bubble generator can be used to implement air flotation functions using microbubbles in various fields.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 Schematic diagram of the structure of a micro-nano bubble generator according to an embodiment of the present invention.

[0021] Figure 2 This is a simulation diagram of the gas phase concentration distribution when bubbles pass through the micropores;

[0022] FIG3 (a) and FIG3 (b) are comparative diagrams showing the flotation effects of micro-nano bubble water and ordinary water on paper pulp obtained according to the present invention;

[0023] Figure 4 Schematic diagram of the structure of a micro-nano bubble generator according to some embodiments of the present invention;

[0024] Figure 5 yes Figure 4 A schematic diagram of the appearance of a micro-nano bubble generator according to the embodiment shown;

[0025] Figure 6(a) and Figure 6(b) are Figure 4 A comparison diagram of the expansion and contraction changes of the first spring of the vibration foaming mechanism in the embodiment shown;

[0026] Figure 7 Schematic diagram of the structure of the micro-nano bubble generator of other embodiments of the present invention;

[0027] Figure 8 yes Figure 7 Enlarged view of the circled location;

[0028] Figure 9 It is the gas phase concentration distribution diagram of the simulation of the vibrating microporous structure with different structures;

[0029] Figure 10 This is a schematic diagram of an application of a micro-nano bubble generator in a water treatment device according to an embodiment;

[0030] Figure 11 This is a schematic diagram of an application of a micro-nano bubble generator in a pharmaceutical production reaction device according to an embodiment;

[0031] Figure 12 This is a schematic diagram of the application of a micro-nano bubble generator in ozone catalytic oxidation according to an embodiment.

[0032] Reference numerals:

[0033] 1000. Air flotation application device;

[0034] 100. Micro-nano bubble generator;

[0035] 10. Power mechanism; 11. Inlet end; 12. Outlet end;

[0036] 20. Gas-liquid mixing mechanism; 21. Mixing tank; 22. Spiral internal component;

[0037] 50. Reactor; 51. Reaction vessel; 52. Catalyst bed; 53. Valve; 54. Water distributor; 55. Ozone generator;

[0038] 60. Vibration foaming mechanism;

[0039] 610, bubble flow channel; 610-a, first bubble flow channel; 610-b, second bubble flow channel;

[0040] 611, shear hole; 613, plugging tube; 615, peripheral wall; 6151, side plate; 6152, plugging plate; 6153, corrugated plate; 616, inlet;

[0041] 63, manifold; 630, changing channel; 631, supporting tube; 632, cone tube;

[0042] 65, vibrating body; 651, second spring; 652, piston; 653, first spring; 655, active chamber;

[0043] 81. Liquid inlet pipe; 82. Air inlet pipe;

[0044] 91. Delivery components. DETAILED DESCRIPTION

[0045] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0047] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0048] The following describes a micro-nano bubble generator 100 for multiple applications according to an embodiment of the present invention.

[0049] Reference Figure 1 The multi-purpose micro-nano bubble generator 100 according to an embodiment of the present invention includes: a power mechanism 10 and a vibration bubbling mechanism 60.

[0050] The vibration foaming mechanism 60 includes a foaming channel 610 having an inlet 616 and a peripheral wall 615 . The peripheral wall 615 is provided with a plurality of shear holes 611 . The aperture of each shear hole 611 ranges from 0.001 to 0.5 mm.

[0051] The vibrating bubbling mechanism 60 further includes a vibrating body 65. The vibrating bubbling mechanism 60 is configured such that the vibrating body 65 can perform simple harmonic vibration. The vibrating body 65 is positioned to satisfy at least one of the following conditions: it is connected to the peripheral wall 615 of the bubbling channel 610 and drives the peripheral wall 615 to perform simple harmonic vibration to repeatedly squeeze the liquid containing bubbles; and it is located within the bubbling channel 610 to repeatedly squeeze the liquid containing bubbles. The vibrating body 65 is configured to directly or indirectly repeatedly squeeze and release pressure on at least a portion of the liquid within the bubbling channel 610 during vibration.

[0052] It is well known to those skilled in the art that the magnitude of the force applied to an object is proportional to its displacement, but in opposite directions. Vibration with this characteristic is called simple harmonic motion, also known as sinusoidal vibration. Representative models of simple harmonic motion include spring oscillator motion and simple pendulum motion. Generally speaking, simple harmonic motion can persist for a period of time, as the kinetic energy and potential energy of an object are continuously converted during motion. In this application, vibrating body 65 is capable of simple harmonic vibration, and vibrating body 65 may include an elastic body, such as a spring or shrapnel.

[0053] There are many possibilities for the position and connection of the vibrating body 65, specifically:

[0054] Case 1: The vibrating body 65 is located outside the bubble channel 610, and the vibrating body 65 is connected to the peripheral wall 615 of the bubble channel 610. Therefore, when the vibrating body 65 performs simple harmonic vibration, it drives the peripheral wall 615 to perform simple harmonic vibration in the direction of changing the internal volume of the bubble channel 610. When the peripheral wall 615 vibrates in the direction of the inside of the bubble channel 610, the internal volume of the bubble channel 610 is reduced, and the liquid in the bubble channel 610 is compressed. When the peripheral wall 615 vibrates in the direction of the outside of the bubble channel 610, the internal volume of the bubble channel 610 is increased, and the pressure of the liquid in the bubble channel 610 is released. For example, Figure 1 In the figure, the peripheral wall 615 includes a side plate 6151 and a blocking plate 6152, and the vibrating body 65 is located outside the bubble channel 610. The vibrating body 65 can be connected to the blocking plate 614, the vibrating body 65 can be connected to the side plate 6151, or the vibrating body 65 is connected to the side plate 6151 and the blocking plate 6152 at the same time. The simple harmonic vibration of the side plate 6151 and the blocking plate 6152 can repeatedly compress and release the liquid in the bubble channel 610.

[0055] Case 2: The vibrating body 65 is located within the bubbling channel 610 and is connected to the peripheral wall 615 of the bubbling channel 610. The peripheral wall 615 can vibrate along with the vibrating body 65. Therefore, when the vibrating body 65 undergoes simple harmonic vibration, it drives the peripheral wall 615 to undergo simple harmonic vibration in a direction that changes the internal volume of the bubbling channel 610. The effect of Case 2 is the same as that of Case 1.

[0056] Case 3: The vibrating body 65 is located within the bubble channel 610 and is connected to the peripheral wall 615 of the bubble channel 610. The peripheral wall 615 is fixed, and a storage space is enclosed between the vibrating body 65 and the peripheral wall 615. This storage space contains a certain amount of liquid. Therefore, when the vibrating body 65 performs simple harmonic vibration, the volume of this storage space can be repeatedly changed. The volume of the storage space decreases, compressing the liquid within the storage space. The volume of the storage space increases, relieving the pressure of the liquid within the storage space. The simple harmonic vibration of the vibrating body 65 can repeatedly compress and release the pressure of the liquid within the bubble channel 610.

[0057] Reference Figure 1 The power mechanism 10 is connected to the liquid inlet pipe 81 and the air inlet pipe 82. The power mechanism 10 is used to suck the liquid in the liquid inlet pipe 81 and the gas in the air inlet pipe 82, and to transport the liquid containing bubbles toward the vibration bubbling mechanism 60. For example, the power mechanism 10 has an inlet end 11 and an outlet end 12. The inlet end 11 is connected to the liquid inlet pipe 81 and the air inlet pipe 82, and the outlet end 12 is connected to the inlet 616. The power mechanism 10 is used to suck the liquid in the liquid inlet pipe 81 and the gas in the air inlet pipe 82, and to transport the liquid containing bubbles toward the outlet end 12.

[0058] Combine Figure 1 The working principle of the micro-nano bubble generator 100 is briefly described as follows:

[0059] The gas and liquid enter the power mechanism 10 to complete the gas-liquid mixing. Some power mechanisms 10 further stir the liquid and gas after sucking them in, and beat the large bubbles into small bubbles, so that the liquid flow contains a large number of small bubbles.

[0060] When a liquid stream containing bubbles flows into the bubbling channel 610, it is restricted by the area of ​​the shear holes 611. Some of the liquid and small-sized bubbles flow out through the shear holes 611, while some of the liquid and large-sized bubbles are trapped within the bubbling channel 610. Simultaneously, the vibrator 65 can perform simple harmonic vibrations. The vibrator 65 or the peripheral wall 615 of the bubbling channel 610 vibrates the liquid stream within the bubbling channel 610, causing the bubbles therein to break and form smaller bubbles.

[0061] Furthermore, during the simple harmonic oscillation of the vibrating body 65, a portion of the liquid flow within the bubble channel 610 is repeatedly squeezed and depressurized, causing the hydraulic pressure to repeatedly rise and fall. During this repeated hydraulic pressure rise and fall, it is difficult for the hydraulic pressure to rise and fall in perfect synchrony at various locations within the bubble channel 610. The result is that the liquid flow within the bubble channel 610 is like being repeatedly kneaded, creating turbulence of varying sizes throughout the bubble channel 610, which crushes and shatters the bubbles within it.

[0062] After encountering the shear hole 611, sufficiently small bubbles will be further sheared and squeezed by the shear hole 611, causing the bubbles to further rupture and produce bubbles with smaller particle sizes, so that the bubbles contained in the liquid flow discharged from the bubbling channel 610 are mainly microbubbles with smaller particle sizes.

[0063] It is understandable that the bubble itself has a certain degree of deformation ability. Under normal circumstances, the bubble can slowly deform (such as into a thin and long bubble) to pass through the shear hole, and the bubble will still return to its original shape after passing through the shear hole.

[0064] In the present application, by limiting the diameter of a single shear hole 611 to between 0.001 and 0.5 mm, larger bubbles are difficult to pass through the shear hole 611 simply by deformation. Consequently, these larger bubbles are trapped in the bubbling channel 610 and are subsequently kneaded. When the bubble size is sufficiently small, coupled with such a small shear hole 611, the turbulent flow in different directions around the bubble can produce a sufficiently strong tearing effect on the bubble. When the bubble is squeezed through the shear hole 611, the tearing effect is sufficient to cut the bubble apart, allowing it to be further sheared and broken.

[0065] In a vibrating liquid environment, bubbles are irregularly broken by turbulence, and the direction of turbulent flow around the bubbles is constantly changing, which is conducive to the generation of micro-nano bubbles and the improvement of gas-liquid mass transfer efficiency. Figure 2The detailed process of the liquid flow passing through the shear hole 611 is further described. When the bubble size is smaller than or close to the aperture of the shear hole 611, these small-sized bubbles can quickly pass through the shear hole 611 along with the liquid flow. When the bubble size is much larger than the aperture of the shear hole 611, these larger-sized bubbles are blocked in the bubbling channel 610 and continue to be kneaded. When the bubble size is slightly larger than the aperture of the shear hole 611, such as Figure 2 When two bubbles, one in front and one in the back, flow toward shear hole 611, the moment the leading bubble passes through shear hole 611 and the liquid in shear hole 611 is carried away by the leading bubble, a negative pressure is formed at shear hole 611, causing the liquid on both sides of the trailing bubble to flow toward shear hole 611, forming an inward-rolling turbulent flow that easily splits the trailing bubble in the middle. After the leading bubble continues to flow forward for a period of time, sufficient liquid is replenished at shear hole 611, and the trailing bubble moves closer to shear hole 611, creating a high pressure there again. The liquid here flows toward both sides of the trailing bubble, forming an outward-rolling turbulent flow that easily tears the trailing bubble apart.

[0066] Since the aperture range of a single shear hole 611 is between 0.001-0.5mm, when the previous bubble passes through the shear hole 611, the inward turbulence and outward turbulence formed on the next bubble, the impact force of the turbulence can generally overcome the surface tension of the bubble, making it easy to cut the bubble into smaller bubbles.

[0067] It is understandable that, guided by the flow direction of the liquid flow, when the liquid flows toward the shear hole 611, it is easy to drive the bubbles to flow toward the shear hole 611. Therefore, the turbulence formed at the shear hole 611 is more likely to hit the bubbles flowing toward the shear hole 611, and the turbulent force can effectively break the bubbles. If the aperture of a single shear hole 611 is too small, not only will the flow resistance of the liquid flow be too large, causing the overall consumption of the device to be too large, but also the shear hole 611 will be easily blocked when there are impurities in the liquid flow. If the aperture of a single shear hole 611 is too large, the blocking effect on large bubbles is reduced, and the bubbles pass through the shear hole 611 too quickly. It is difficult for the shear hole 611 to form turbulence sufficient to break subsequent bubbles due to the sudden change in hydraulic pressure. Therefore, the aperture design of the single shear hole 611 in this application matches the required hydraulic change at the shear hole 611.

[0068] In the present application, taking the example of a vibrating body 65 located in a bubble channel 610 and used to squeeze the internal liquid, when the power mechanism 10 inputs a liquid flow toward the bubble channel 610, the liquid flow will impact the vibrating body 65, causing the vibrating body 65 to move. Since the vibrating body 65 can perform simple harmonic oscillation, part of the kinetic energy of the vibrating body 65 will be converted into potential energy when it moves. Afterwards, the potential energy and kinetic energy of the vibrating body 65 are converted back and forth, so that the vibrating body 65 can squeeze and release the liquid in the bubble channel 610 multiple times with a single impact. Moreover, when the power mechanism 10 continuously inputs a liquid flow into the bubble channel 610, the liquid flow can continuously impact the vibrating body 65, so that the vibrating body 65 can continuously squeeze and release the liquid in the bubble channel 610, thereby continuously generating microbubbles.

[0069] Of course, the initial motive force of the vibrating body 65 is not limited to the impact of the liquid flow. The vibrating bubbling mechanism 60 may also include other power devices (such as cylinders, motors, etc.) to apply impact force to the vibrating body 65, thereby achieving better control over the movement of the vibrating body 65. However, in general, the vibrating body 65 can perform simple harmonic oscillation, and by utilizing its kinetic energy-potential energy conversion, the power consumption of the vibrating bubbling mechanism 60 can be significantly reduced. Even when the initial motive force of the vibrating body 65 is solely the impact force of the liquid flow, not only is the structure of the vibrating bubbling mechanism 60 greatly simplified, but the vibrating bubbling mechanism 60 does not require electricity, significantly reducing the power consumption of the micro-nano bubble generator 100.

[0070] The micro-nano bubble generator 100 has a good flotation effect. Micro-nano bubbles have a small particle size and a large specific surface area, resulting in a significantly higher gas content than larger bubbles. When used for flotation in sewage treatment, the effect is particularly significant. Figures 3(a) and 3(b) show a comparison of the flotation effect of micro-nano bubble water and ordinary water on paper pulp obtained using this application scheme. Figure 3(a) shows the flotation effect of micro-nano bubbles on paper pulp, where the micro-nano bubbles lift the paper pulp to the surface. Figure 3(b) shows the flotation effect of ordinary water without micro-nano bubbles on paper pulp, where the paper pulp sinks to the bottom.

[0071] In this application, the aperture of the shear hole 611 is obtained through precise analysis and design. Using multi-physics field simulation, a vibration microporous structure is constructed, and the results are as follows: Figure 9 For the convenience of explanation, it is assumed that Figure 9 The microporous wall is located on the left side, and the liquid with bubbles is squeezed to the left by the spring (referring to another part of the peripheral wall 615 or the vibrating body 65).

[0072] When the liquid with bubbles is squeezed to the left, the shrapnel moves leftward, and the large bubbles are split into smaller ones under the action of channel shear, thus achieving the purpose of breaking the bubbles. During the high-frequency periodic movement of the shrapnel, the bubbles can be continuously broken, which is more conducive to the generation of micro-nano bubbles.

[0073] At the same time, the structure of the shrapnel in the vibration structure, the structure and size of the micropores were simulated and compared. Figure 9 As can be seen from (a) and (b), both curved and flat springs can effectively break up bubbles. Therefore, in the embodiment of the present invention, there is no restriction on the shape of the vibration bubbling mechanism 60 that performs simple harmonic vibration.

[0074] from Figure 9 (c) shows that when there is only a single hole on the microplate, compared with Figure 9 As for the porous structure in (a), the single-pore structure has a very limited effect on the bubble breaking.

[0075] from Figure 9 From (d), it can be seen that when the micropores are too large, the structure has a weaker effect on breaking bubbles. Figure 9 As can be seen from (e), when the micropores are too small, the structure has a weaker effect on breaking bubbles.

[0076] In summary, the present application solution specifically defines the shear hole 611 of the vibration foaming mechanism 60 .

[0077] In the present application, the vibration and bubbling mechanism 60 can directly adopt a spring body as the vibrating body 65, or can adopt other driving devices (such as a vibration motor), which is not limited here. Driving devices such as vibration motors and spring bodies each have their own advantages. The driving force obtained by adopting a driving device makes the power of simple harmonic oscillation stronger, but the use of a spring body can spontaneously generate simple harmonic oscillation, reducing energy consumption. In this application, the vibrating body 65 preferably adopts a spring body, and the impact generated by the flow of liquid can drive the spring body to expand and contract. After the spring body is compressed or stretched, the spring body spontaneously generates simple harmonic oscillation, so that the micro-nano bubble generator 100 does not need to be provided with an additional power mechanism at the vibration and bubbling mechanism 60, and the micro-nano bubble generator 100 as a whole becomes a low-energy consumption device.

[0078] Combined with the position of the vibrating body 65, the micro-nano bubble generator 100 can have a variety of structural forms. Figure 4 - Figure 6(b) and Figure 7-Figure 8 The structures of the micro-nano bubble generator 100 in two different embodiments are described. For simplicity of description, it is assumed that the liquid with bubbles pumped by the device is water.

[0079] Reference Figure 4In Figure 6(b), in some embodiments, the bubbling channel 610 includes a first bubbling channel 610-a, whose peripheral wall 615 includes a corrugated plate 6153. The vibrating body 65 includes a first spring 653, which is located within the first bubbling channel 610-a and connected to the corrugated plate 6153. In other words, a portion of the vibrating bubbling mechanism 60 functions as a corrugated water distributor, with at least a portion of the wall of the corrugated water distributor being corrugated.

[0080] The power mechanism 10 pumps water with bubbles into the vibrating bubble mechanism 60. This water flow is accompanied by turbulence and eddies. When the water flows into the vibrating bubble mechanism 60, particularly into the first bubble channel 610-a, it impacts the peripheral wall 615 of the first bubble channel 610-a. This impact on the corrugated plate 6153 causes it to deform, causing the first spring 653 to expand and contract.

[0081] After being compressed or stretched, the simple harmonic oscillation characteristics of first spring 653 cause it to repeatedly extend and contract, driving the corrugated plate 6153 to expand and contract. As water flows, first spring 653 continuously expands and contracts, driving the corrugated plate 6153 to continuously reciprocate, squeeze, and deform, mutually reinforcing each other. In particular, the driving effect of the water flow on the corrugated plate 6153 is uneven. The simple harmonic oscillation characteristics of first spring 653 can compensate for this uneven water flow. Through the simple harmonic oscillation of first spring 653, coupled with the shearing action of the small holes, bubbles mixed in the water can be secondary crushed, producing bubbles of smaller particle size.

[0082] The natural frequency f of the first spring 653 is ≥ 5 Hz. Practice has shown that when the natural frequency f of the first spring 653 is ≥ 5 Hz, the vibration frequency of the corrugated plate 6153 can be ≥ 5 Hz. This significantly improves the efficiency of bubble breakage during the vibration of the corrugated plate 6153, allowing bubbles to be broken to the desired particle size with fewer vibrations, resulting in high microbubble generation efficiency.

[0083] Specifically, if Figure 5 As shown, the vibrating bubbling mechanism 60 can be integrally formed into a cylindrical body, and the peripheral wall 615 of the first bubbling flow channel 610-a includes two upper and lower side plates 6151 and a blocking plate 6152 connected between the two side plates 6151. The two side plates 6151 are at least partially corrugated plates 6153, and the first spring 653 is connected between the two side plates 6151. Both side plates 6151 are provided with shear holes 611.

[0084] Among them, such as Figure 4As shown, water enters the vibrating bubble mechanism 60 from the center. Therefore, the first bubble channel 610-a is generally annular, with the center of the first bubble channel 610-a being the inlet 616. Water flows radially from the inside outward. During this flow, it is repeatedly squeezed by the corrugated plate 6153 and flows out through the shear holes 611 in the side plate 6151. During this flow, bubbles gradually break down from large to small and are carried out of the shear holes 611 by the water flow.

[0085] Furthermore, as shown in Figures 6(a) and 6(b), the corrugated plate 6153 has crests and troughs, and is provided with shear holes 611, which are located at the crests and / or troughs of the corrugated plate 6153. It is understood that when the corrugated plate 6153 is repeatedly pulled and deformed, the crests and troughs deform the most, and the squeezing and tearing forces on bubbles are strongest there. Therefore, the provision of shear holes 611 there can maximize the effect of breaking up bubbles in the water.

[0086] Optionally, the peripheral wall 615 of the first bubbling channel 610-a includes two opposing corrugated plates 6153, with a plurality of first springs 653 connected between the two corrugated plates 6153. The number of first springs 653 can be appropriately set based on the water pressure, and optionally, there can be 4-6 first springs 653. The first springs 653 can be positioned at the edge of the side plate 6151, which facilitates driving the entire side plate 6151 into simple harmonic vibration.

[0087] More specifically, the corrugated plate 6153 comprises two layers of circular plates, with the corrugations arranged in an annular pattern. The shear holes 611 are located at the troughs / peaks of the waves, and the diameter of the shear holes 611 ranges from 0.001 to 0.5 mm. Furthermore, the diameter of the shear holes 611 ranges from 0.01 to 0.1 mm. For example, the diameter of the shear holes 611 ranges from 0.01 mm, 0.002 mm, 0.005 mm, 0.007 mm, 0.011 mm, 0.028 mm, 0.033 mm, 0.045 mm, 0.05 mm, 0.06 mm, 0.085 mm, or 0.1 mm.

[0088] In some specific embodiments, the distance between the two side panels 6151 is 0.1-10 mm, that is, the distance between the two corrugated panels 6153 is 0.1-10 mm. Furthermore, optionally, the distance between the two side panels 6151 is 0.1-1 mm. For example, the distance between the two side panels 6151 is 0.1 mm, 0.2 mm, 0.35 mm, 0.45 mm, 0.55 mm, 0.6 mm, 0.8 mm, 1 mm, etc.

[0089] In the micro-nano bubble generator 100 of this embodiment, the operating water pressure can be 0.14-2.5 MPa, and it can work normally under the normal water pressure of tap water. In particular, the higher the water pressure, the finer and more uniform the microbubbles generated.

[0090] The gas content (volume fraction) in the liquid entering the first bubbling channel 610 - a may be 5%-50%. Further optionally, the gas content (volume fraction) in the liquid entering the first bubbling channel 610 - a may be 15%-30%, such as 15%, 20%, 25%, 30%, etc.

[0091] In addition, according to simulations conducted by the inventors' team, the ratio of bubble diameter D to the aperture d of shear hole 611 can be selected to be D / d = 2 to 8. Furthermore, the ratio of bubble diameter D to aperture d of shear hole 611 can be 4, resulting in a better crushing effect. Simulations revealed that when the ratio of bubble diameter D to aperture d is less than 2, the bubbles only deform when passing through the small holes. Then, when the corrugated plate moves away, the bubbles return to a circular shape. At this point, the corrugated vibration and small hole shearing have no crushing effect. Based on this relationship, when the present invention is actually used, the aperture d of shear hole 611 can be selected based on the desired bubble diameter.

[0092] Reference Figure 7 and Figure 8 In other embodiments, the bubbling channel 610 includes a second bubbling channel 610-b. A portion of the peripheral wall 615 of the second bubbling channel 610-b that faces the inlet 616 is a blocking plate 6152. The vibrating body 65 further includes a piston 652 and a second spring 651. The piston 652 is slidably engaged within the second bubbling channel 610-b. The piston 652 reciprocates between the inlet 616 and the blocking plate 6152. An active chamber 655 is defined within the second bubbling channel 610-b between the blocking plate 6152 and the piston 652. The shear hole 611 communicates with the active chamber 655. The piston 652 is provided with a through hole for liquid passage. The second spring 651 is connected at both ends to the blocking plate 6152 and the piston 652, respectively.

[0093] When the hydraulic force is greater than the elastic force of the second spring 651, the second spring 651 compresses the piston 652 toward the blocking plate 6152, turning the active chamber 655 into a high-pressure chamber, squeezing the bubbles. When the elastic force of the second spring 651 is greater than the hydraulic force, the second spring 651 pulls the piston 652 toward the inlet 616, turning the active chamber 655 into a low-pressure chamber, pulling the bubbles. This reciprocating process creates mechanical vibration conditions.

[0094] The natural frequency f of the second spring 651 is ≥5Hz, which drives the vibration frequency of the piston 652 to be ≥5Hz. The frequency of repeated lifting and lowering of the hydraulic pressure in the active chamber 655 is not less than 5HZ. In this way, the efficiency of bubble crushing during repeated squeezing and pulling is greatly improved. The bubbles can be crushed to the required particle size with only a few vibrations, and the efficiency of microbubble generation is high.

[0095] Specifically, the vibrating foaming mechanism 60 further includes a blocking tube 613, which is disposed within the active chamber 655 and connected to the blocking plate 6152. The blocking tube 613 is open toward one side of the piston 652. The shear hole 611 is located outside the blocking tube 613, and the through hole in the piston 652 is disposed directly opposite the blocking tube 613. When the piston 652 abuts against the blocking tube 613, the blocking tube 613 is sealed.

[0096] The provision of plug 613 limits the position of second spring 651, facilitating assembly. Furthermore, when piston 652 abuts plug 613, it seals it. Since shear hole 611 is located outside plug 613, the annular cavity outside plug 613 effectively forms a cavity connected only to shear hole 611. Liquid in the cavity is now prevented from flowing toward inlet 616, ensuring that bubbles are trapped there, squeezed, and shattered.

[0097] In some specific embodiments, Figure 8 As shown, the vibration bubbling mechanism 60 further includes a changing channel 630 located upstream of the bubbling flow channel 610 , and the flow area of ​​the changing channel 630 gradually increases in the direction toward the inlet 616 .

[0098] In the working state, the changing channel 630 concentrates the water flow in the center of the pipeline, so that the water flow concentrates on impacting the piston 652. The movement of the piston 652 causes the second spring 651 to absorb the impact potential energy of the water flow to the maximum extent and store force.

[0099] Specifically, the vibration bubble mechanism 60 also includes a collecting pipe 63, which includes: a supporting tube 631, which is a circular tube and is connected to the peripheral wall 615 of the bubble flow channel 610; a conical tube 632, which is coaxially arranged in the supporting tube 631, and the diameter of the conical tube 632 gradually decreases in the direction toward the inlet 616 to form a changing channel 630, and the conical tube 632 is connected to the supporting tube 631 at one end adjacent to the inlet 616.

[0100] The shapes of the support tube 631 and the tapered tube 632 are easy to machine, and the support tube 631 provides support for the tapered tube 632. Furthermore, at the end of the manifold 63 away from the blocking plate 6152, i.e., upstream of the manifold 63, the support tube 631 and the tapered tube 632 are disconnected. When liquid flows in, it squeezes the wall of the tapered tube 632, causing vibration.

[0101] The inverted tapered tube 632 increases the pipeline pressure and the water head by changing the diameter, so as to fully squeeze the vibrating body 65 .

[0102] In summary, the core principles of both embodiments of the micro-nano bubble generator 100 are to utilize simple harmonic motion (primarily a spring, though other drive devices can also be used) and small orifice shearing to secondary break up bubbles mixed in the liquid phase. Vibrational breakup is driven by hydraulic impact and spring vibration. After the bubbles in the water are broken by simple harmonic motion, they are further broken down by shearing and squeezing through the small orifices during the discharge process, resulting in smaller bubbles.

[0103] When the corrugated plate 6153 is used, the vibration of the corrugated plate 6153 can further enhance the effect of breaking the bubbles, especially the corrugated plate 6153 will deform during the movement, and the deformation of the shear hole 611 can also enhance the squeezing and breaking effect of the bubbles.

[0104] In some embodiments, as Figure 7 As shown, the micro-nano bubble generator 100 also includes: a gas-liquid mixing mechanism 20, which is connected to the outlet end 12 of the power mechanism 10, and a spiral internal component 22 is provided in the gas-liquid mixing mechanism 20 to perform secondary mixing of gas and liquid, and the gas-liquid mixing mechanism 20 is connected to the bubble flow channel 610.

[0105] Specifically, the gas-liquid mixing mechanism 20 comprises a mixing tank 21 and a spiral internal member 22, which is located within the mixing tank 21. The gas-liquid mixture, after primary mixing, is pumped into the mixing tank 21. The spiral internal member 22 guides the gas-liquid mixture into a spiral flow. Hydraulic action increases the pressure within the mixing tank 21, forcing large bubbles out of the water while retaining smaller bubbles for further mixing under the spiral agitation. The spiral internal member 22 provides a secondary dispersion and mixing of the gas-liquid mixture, further reducing the bubble size.

[0106] Specifically, a plurality of spiral internal components 22 are provided in the mixing tank 21 , and the plurality of spiral internal components 22 are spaced apart along the circumferential direction.

[0107] Specifically, the gas-liquid mixing mechanism 20 is connected to an exhaust valve, which exhausts air when the air pressure in the gas-liquid mixing mechanism 20 reaches a set value. An automatic exhaust valve is set above the gas-liquid mixing mechanism 20. When larger bubbles are squeezed out of the water, the gas is discharged through the exhaust valve. The small bubbles remaining in the water complete a second gas-water mixing under the condition of increased pressure and flow into the bubble flow channel 610. By setting up an automatic exhaust valve, the pressure in the gas-liquid mixing mechanism 20 can be adjusted, increasing the pressure to promote the dissolution and mixing of bubbles in the liquid. When the pressure reaches a threshold, the exhaust valve automatically opens, releasing the gas above the gas-liquid mixing mechanism 20 and exhausting the remaining gas.

[0108] In some specific embodiments, the power mechanism 10 is a water pump, and the inlet end 11 of the water pump is connected to the liquid inlet pipe 81 and the air inlet pipe 82 via a tee. Using a water pump for power supply not only provides a strong driving force, which can impart greater kinetic energy to the liquid, but also allows the impeller of the water pump to fully strike the gas and liquid, resulting in thorough mixing of the gas and liquid.

[0109] Specifically, the water pump is a multi-stage impeller water pump. The impeller of a multi-stage impeller water pump rotates at a high speed, which can generate a large shear force within the pump. Under the strong action of the multi-stage impeller, large bubbles are broken down into smaller bubbles and dispersed in the water. In some solutions, depending on the application scenario, the water pump can also use a diaphragm pump or other types of water pumps.

[0110] Furthermore, the water pump can be driven by a motor, and the motor can drive at least one impeller in the water pump to rotate.

[0111] exist Figure 7-Figure 8 In the specific embodiment shown, the micro-nano bubble generator 100 can generate micro bubbles with low energy consumption. Under the action of pump pressure, the gas-water mixture enters the vibrating bubbling mechanism 60 with a certain water head. After passing through the inverted conical tapered tube 632, the pipe diameter becomes smaller and the flow rate increases. Then, when flowing in the tapered tube 632, due to the gradual increase in pipe diameter, the water pressure increases, impacting the piston 64, compressing the second spring 651 therein, and further increasing the water pressure in the active cavity 655. The elastic force generated by the second spring 651 pushes the piston 652 in the opposite direction. Subsequently, the hydraulic action impacts the piston 652 again, thus forming a reciprocating vibration. Under the action of the broken instrument and the tiny pores, the bubbles are further mixed and dispersed to form a milky white mixture of micro-nano bubbles and liquid, and released through the bubbling flow channel 610.

[0112] The low-energy micro-nano bubble generator fully utilizes the pipeline water pressure, the second spring force, the shear force of the tiny pores, etc. in the process of generating micro-nano bubbles. Therefore, it is only necessary to input gas and liquid into the system in the power mechanism 10 and give considerable kinetic energy to generate a milky white micro-nano bubble mixture.

[0113] The micro-nano bubble generator 100 significantly improves gas-liquid mass transfer. The dissolved oxygen concentration in deionized water after 24 hours of standing is 6.5-7.8 mg / L. Using air as the gas source, a conventional aeration head with 50 minutes of aeration reduces the dissolved oxygen concentration to 8.5-9.5 mg / L. However, after 50 minutes of aeration using the low-energy micro-nano bubble generator 100, the dissolved oxygen concentration in the water is 11.5-13.5 mg / L. Compared to conventional aeration, this increases the dissolved oxygen concentration by 2-4 mg / L, improving mass transfer efficiency by over 20%.

[0114] The following describes an air flotation application device 1000 according to an embodiment of the present invention with reference to the accompanying drawings.

[0115] The air flotation application device 1000 according to an embodiment of the present invention includes: a reactor 50 and the aforementioned multi-purpose micro-nano bubble generator 100 . The liquid discharged from the micro-nano bubble generator 100 flows into the reactor 50 .

[0116] The micro-nano bubble generator 100 of the present application can be applied to a variety of industrial productions, and the air flotation application device 1000 can be various industrial processing devices that use the micro-nano bubble generator 100 in industry.

[0117] like Figure 10 The figure shows the application of a micro-nano bubble generator 100 in flotation. The flotation application device 1000 can be a water treatment device. For example, a reactor 50 contains sewage containing soluble sludge, and a vibrating bubble mechanism 60 is arranged in the reactor 50 to directly inject microbubble water into the reactor 50.

[0118] like Figure 11 The figure shows another application of a micro-nano bubble generator 100 in flotation. The flotation device 1000 can be a pharmaceutical production reactor. A pharmaceutical solvent is contained within a reactor 50. A vibrating bubbling mechanism 60 is positioned within the reactor 50, directly injecting microbubble water into the reactor 50. The pharmaceutical is then dispensed into the reactor 50 via a dispensing assembly 91.

[0119] like Figure 12 Figure 1 shows a schematic diagram of a micro-nano bubble generator 100 used in ozone catalytic oxidation. The system comprises a reaction vessel 51, a catalyst bed 52, a valve 53, a water distributor 54, and an ozone generator 55. The catalyst bed 52 is located within the reaction vessel 51. Valve 53 is an exhaust valve located at the top of the reaction vessel 51, and the water distributor 54 is located at the bottom of the reaction vessel 51. The micro-nano bubble generator 100 is connected to the water distributor 54 for water supply, while the ozone generator 55 is connected to the micro-nano bubble generator 100.

[0120] The micro-nano bubble generator 100 of the present application can be applied to the field of water treatment; it can be applied to the ozone catalytic oxidation process to enhance ozone mass transfer and improve the catalytic oxidation effect; when treating water bodies with a high concentration of suspended matter, the improved micro-nano bubble generator 100 is used to generate fine micro-nano bubbles, and the flotation effect is significantly improved. In addition, the micro-nano bubble generator 100 can also be applied to multiple fields such as the pharmaceutical industry and the chemical industry. The vibration bubbling structure is promoted and applied, and a micro-bubble generator with ripple vibration + microporous bubbling is designed to generate microbubbles, and it is applied to the flotation device to increase the processing efficiency and treatment effect of the flotation technology and reduce the energy consumption of the flotation process.

[0121] Throughout this specification, reference to terms such as "embodiment" or "example" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0122] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A multi-field micro-nano bubble generator (100), characterized in that: include: A vibration foaming mechanism (60), the vibration foaming mechanism (60) comprising a foaming channel (610), the foaming channel (610) having an inlet (616), the foaming channel (610) having a peripheral wall (615), the peripheral wall (615) being provided with a plurality of shear holes (611), the aperture of each shear hole (611) being in the range of 0.001-0.5 mm; The vibrating bubbling mechanism (60) further includes a vibrating body (65), the vibrating bubbling mechanism (60) being configured such that the vibrating body (65) can perform simple harmonic vibration, and the position of the vibrating body (65) satisfies at least one of the following conditions: being connected to the peripheral wall (615) of the bubbling flow channel (610) and driving the peripheral wall (615) to perform simple harmonic vibration to repeatedly squeeze the liquid with bubbles, or being located in the bubbling flow channel (610) to repeatedly squeeze the liquid with bubbles; a power mechanism (10), the power mechanism (10) being connected to the liquid inlet pipe (81) and the air inlet pipe (82), the power mechanism (10) being used to suck the liquid in the liquid inlet pipe (81) and the gas in the air inlet pipe (82), and to transport the liquid containing bubbles toward the vibrating bubbling mechanism (60); The bubbling flow channel (610) comprises a first bubbling flow channel (610-a), and the peripheral wall (615) of the first bubbling flow channel (610-a) comprises a corrugated plate (6153); The vibrating body (65) comprises a first spring (653), the first spring (653) being located in the first bubbling flow channel (610-a) and connected to the corrugated plate (6153); The natural frequency f of the first spring (653) is ≥ 5 Hz; The corrugated plate (6153) has crests and troughs, and the shear holes (611) are provided on the corrugated plate (6153); The peripheral wall (615) of the first bubbling flow channel (610-a) comprises two corrugated plates (6153) facing each other, and a plurality of the first springs (653) are connected between the two corrugated plates (6153).

2. The multi-purpose micro-nano bubble generator (100) according to claim 1, characterized in that: The shear holes (611) are located at the crests and / or troughs of the corrugated plate (6153).

3. The multi-purpose micro-nano bubble generator (100) according to claim 1, characterized in that: The vibration foaming mechanism (60) further comprises a change channel (630) located upstream of the foaming flow channel (610), and the flow area of ​​the change channel (630) gradually increases in the direction toward the inlet (616).

4. The multi-purpose micro-nano bubble generator (100) according to claim 3, characterized in that: The vibration foaming mechanism (60) further includes a manifold (63), wherein the manifold (63) includes: A supporting tube (631), the supporting tube (631) being a circular tube and connected to the peripheral wall (615) of the bubbling flow channel (610); A conical tube (632) is coaxially arranged in the supporting tube (631), the diameter of the conical tube (632) gradually decreases in a direction toward the inlet (616) to form the changing channel (630), and the conical tube (632) is connected to the supporting tube (631) at one end adjacent to the inlet (616).

5. The multi-field application micro-nano bubble generator (100) according to any one of claims 1 to 4, characterized in that: Also includes: A gas-liquid mixing mechanism (20) is connected to the outlet end (12) of the power mechanism (10), a spiral internal component (22) is provided in the gas-liquid mixing mechanism (20) for secondary mixing of gas and liquid, and the gas-liquid mixing mechanism (20) is connected to the bubbling flow channel (610).

6. An air flotation application device (1000), characterized in that: include: Reactor (50); According to the multi-field-purpose micro-nano bubble generator (100) according to any one of claims 1 to 5, the liquid discharged from the micro-nano bubble generator (100) flows into the reactor (50).

Images