Nanometer bubble generating device

Abstract

The utility model relates to a nanobubble generating device which comprises a reaction pipeline used for generating nanobubbles and provided with a liquid flow inlet; a compression device; the bubble generating medium structure is rotatably arranged in the reaction pipeline, so that the gas conveyed by the compression device forms nano bubbles and the nano bubbles are released into the liquid in the reaction pipeline; the guide structure is detachably arranged on the upstream side in the reaction pipeline, and a guide groove used for guiding liquid to spirally rotate to flow to the downstream side is formed in the guide structure. The bubble generation medium structure can rotate at a high speed to generate a large number of nano bubbles, the guide groove capable of guiding liquid to rotate spirally is formed in the guide structure on the upstream side, and when the liquid enters a pipeline, the liquid can flow spirally without touching the inner wall of the pipeline, so that the nano bubbles are generated. And the collision strength of the liquid and the bubble generating medium structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas-liquid mixing technology, and in particular to a nanobubble generating device. Background Technology

[0002] Nanobubbles exhibit long-term stability in liquid carriers and do not aggregate during transportation. These properties enable nanobubbles to be widely used in water treatment plants, plant growth, aquaculture, disinfection, and cosmetic applications.

[0003] In the prior art, baffles are often installed in pipes to increase the contact between air bubbles and liquid. However, installing baffles can easily cause debris such as hair and floating objects in the liquid to get stuck and obstruct the flow of liquid. In addition, baffles are not easy to clean and remove.

[0004] Therefore, based on years of experience and practice in related industries, the inventor proposes a nanobubble generating device to overcome the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide a nanobubble generating device that overcomes the problems existing in the prior art. The bubble generating medium structure of this invention can generate a large number of nanobubbles by high-speed rotation. The upstream guide structure is provided with a guide groove that can guide the liquid to rotate in a spiral. When the liquid enters the pipe, it can flow in a spiral manner without touching the inner wall of the pipe, and the intensity of the collision between the liquid and the bubble generating medium structure is increased.

[0006] The purpose of this invention is achieved as follows: a nanobubble generating device, comprising:

[0007] A reaction conduit for generating nanobubbles, wherein a liquid inlet is provided on the side wall of the reaction conduit;

[0008] A compression device that pressurizes and delivers gas to the reaction pipeline;

[0009] A bubble generation medium structure that can be rotatably disposed inside the reaction pipeline, causing the gas delivered by the compression device to form nanobubbles and releasing the nanobubbles into the liquid in the reaction pipeline;

[0010] A guide structure is detachably installed on the upstream side of the reaction pipeline. The guide structure is axially opposite to the liquid inlet of the reaction pipeline. The guide structure is provided with a guide groove for guiding the liquid to flow in a spiral rotation to the downstream side.

[0011] In a preferred embodiment of this utility model, a bubble generating medium channel for gas flow is provided within the bubble generating medium structure. The bubble generating medium channel is arranged in a direction parallel to the axial direction of the bubble generating medium structure, and the downstream end of the bubble generating medium channel is closed. A plurality of micropores are provided on the sidewall of the bubble generating medium structure. Gas in the bubble generating medium channel forms nanobubbles through the micropores, and the nanobubbles are released into the liquid in the reaction pipe.

[0012] In a preferred embodiment of this invention, the liquid inlet is offset from the axis of the bubble generating medium structure.

[0013] In a preferred embodiment of the present invention, the guiding structure includes an outer tube arranged axially along the reaction pipe, an inner tube arranged radially spaced inside the outer tube, the inner cavity of the inner tube forming a gas inlet hole, the outlet end of the gas inlet hole being sealed and connected to the bubble generating medium channel; a liquid channel portion opening towards the downstream side is formed between the inner tube and the outer tube, and a guide groove is provided on the outer wall of the inner tube for causing the liquid to flow in a spiral manner.

[0014] In a preferred embodiment of the present invention, the outer tube is provided with a notch facing the downstream side.

[0015] In a preferred embodiment of this utility model, an upstream end wall is provided at the upstream end of the inner tube and the outer tube, the upstream end wall closes the upstream end of the liquid channel and the reaction pipe, and a gas through hole is provided on the upstream end wall that communicates with the gas inlet hole; the compression device includes a gas storage container for storing gas, and the gas storage container is connected to the gas through hole through a gas channel.

[0016] In a preferred embodiment of the present invention, the length of the guide structure along the axial direction of the reaction pipe is less than or equal to 20% of the axial length of the reaction pipe.

[0017] In a preferred embodiment of the present invention, the ratio of the radial cross-sectional area of ​​the liquid channel to the radial cross-sectional area of ​​the outer wall of the inner tube is greater than or equal to 1:1 and less than or equal to 2:1.

[0018] In a preferred embodiment of this utility model, the outlet end of the gas inlet hole is enlarged to form a mating groove, and the inlet end of the bubble generating medium channel is provided with a mating protrusion, which can be sealed and connected in the mating groove; a sealing element is provided between the mating protrusion and the mating groove.

[0019] In a preferred embodiment of the present invention, the downstream end of the reaction pipeline is provided with a first conical section whose diameter gradually decreases downstream, and the downstream end of the bubble generating medium structure is provided with a second conical section whose diameter gradually decreases downstream. The first conical section and the second conical section are provided with the same cone angle, and the cone angle ranges from 40° to 90°.

[0020] As described above, the nanobubble generating device of this invention has the following beneficial effects:

[0021] In this invention, the bubble-generating medium structure can generate a large number of nanobubbles through high-speed rotation, eliminating the need for liquid flow generated by liquid nozzles or the like. A guide groove is provided on the guide structure inside the reaction pipe to guide the liquid in a spiral rotation. When the liquid enters the reaction pipe, it can flow in a spiral manner without touching the inner wall of the pipe, increasing the chance of collision between the liquid and the bubble-generating medium structure, and increasing the intensity of the collision. Since the guide structure is only located on the upstream side of the reaction pipe, there is no need to provide a baffle that completely separates the liquid flow, reducing the chance of collision between the liquid flow and the guide structure. Compared with the case of a baffle, this reduces the risk of blockage caused by hair, floating objects, or other debris in the liquid, and makes the liquid flow smoother. Because the guide structure can be easily removed from the pipe or the bubble-generating medium, it can be easily cleaned and disassembled. Attached Figure Description

[0022] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0023] Figure 1 This is a schematic diagram of the nanobubble generating device of this utility model.

[0024] Figure 2 This is an internal cross-sectional view of the nanobubble generating device of this invention.

[0025] Figure 3 This is a top view of the interior of the nanobubble generating device of this invention.

[0026] Figure 4 This is a cross-sectional view of the micropores on the sidewall of the bubble-generating medium structure of this utility model.

[0027] Figure 5 This is a front view of the guide structure of this utility model.

[0028] Figure 6 This is a left-side view of the guide structure of this utility model.

[0029] Figure 7 This is a right-side view of the guide structure of this utility model.

[0030] Figure 8 This is a rear view of the guide structure of this utility model.

[0031] Figure 9 This is a cross-sectional schematic diagram of the guide structure of this utility model.

[0032] Figure 10 This is a particle size distribution diagram of nanobubbles prepared using the nanobubble generating device of this invention.

[0033] In the picture:

[0034] 100. Nanobubble generating device;

[0035] 1. Storage tank;

[0036] 21. Passage;

[0037] 22. Compression device; 221. Gas storage container; 222. Check valve; 223. Gas passage;

[0038] 23. Bubble-generating medium structure; 231. Second cone section; 232. Micropore; 233. Fitting protrusion;

[0039] 24. Bubble generation medium channel;

[0040] 25. Reaction pipe; 251. Pipe sidewall; 252. End wall; 253. Liquid inlet; 254. First cone section;

[0041] 3. Guiding structure; 301. Gas inlet hole; 302. Liquid channel section;

[0042] 31. Outer tube;

[0043] 32. Inner tube; 321. Guide groove;

[0044] 33. Notch;

[0045] 34. Upstream end wall; 341. Gas passage;

[0046] 35. Mating groove;

[0047] 36. Sealing components;

[0048] 4. Pressure pump. Detailed Implementation

[0049] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0050] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] like Figures 1 to 9 As shown, this utility model provides a nanobubble generating device 100, comprising:

[0053] A channel 21 allows liquid flow, and a reaction conduit 25 for generating nanobubbles is provided on the channel 21; the channel 21 is the passage for liquid to pass through. The channel 21 has an upstream end (the liquid inlet end) that connects to a liquid tank, ocean, river, etc.; a liquid inlet is provided on the side wall of the reaction conduit 25;

[0054] The compression device 22 pressurizes and delivers the gas to the reaction pipeline 25;

[0055] A bubble-generating medium structure 23, which causes the gas supplied by the compression device 22 to form nanobubbles and release them into the liquid in the reaction pipe 25, is rotatably disposed within the reaction pipe 25. The rotation direction of the bubble-generating medium structure 23 is set to be parallel to the direction of liquid flow in the reaction pipe 25. Figure 2 (The direction of the black arrows is the same.) The bubble-generating medium structure 23 is set inside the reaction pipe 25, forming the middle part of the channel 21;

[0056] A guide structure 3 is detachably installed on the upstream side of the reaction pipeline 25. The guide structure 3 is axially opposite to the liquid inlet 253. A guide groove 321 is provided on the guide structure 3 to guide the liquid spiral to flow downstream.

[0057] The nanobubble generating device 100 is a device for generating nanobubbles in a liquid. Here, nanobubbles refer to bubbles with a size (diameter) between 50 nm and 500 nm under normal temperature and pressure. Figure 1 As shown, the nanobubble generating device 100 is a device that supplies dissolved gas or a liquid that allows gases to coexist to the storage tank 1.

[0058] Storage tank 1 is a tank for storing liquid, in which gas is dissolved or coexists with the liquid as nanobubbles. The downstream end of the liquid flow channel 21 (the end opposite to the upstream end of the liquid flow, which is the liquid outlet end) is connected to storage tank 1.

[0059] Here, dissolution refers to the state in which a gas is dissolved in a liquid. Furthermore, coexistence refers to the state in which a gas exists in a liquid in the form of nanobubbles.

[0060] Under normal circumstances, the liquid stored in the storage tank 1 can be seawater or fresh water from rivers and lakes. In the case of the nanobubble generating device 100 used for sewage treatment, the liquid in the storage tank 1 can be seawater, fresh water from rivers and lakes, domestic sewage, industrial wastewater, etc.

[0061] Furthermore, in the nanobubble generating device 100, the gas supplied to the storage tank 1 is one or more of air, oxygen, ozone, nitrogen, hydrogen, and argon. In the case of the nanobubble generating device 100 used for wastewater treatment, the gas supplied to the storage tank 1 is a substrate with oxidizing properties, such as oxygen or ozone.

[0062] Because the bubble-generating medium structure 23 can rotate to generate a large number of nanobubbles, liquid flow generated by liquid nozzles or the like is not required. Furthermore, due to the provision of the guide structure 3, the flow of liquid flowing in from the liquid inlet 253 can be guided in a spiral manner. Then, on the downstream side, as the liquid flows while maintaining the spiral flow created by the guide structure 3, the intensity of the collision between the liquid and the bubble-generating medium structure 23 increases.

[0063] In this invention, the bubble-generating medium structure 23 can generate a large number of nanobubbles by high-speed rotation, without the need for liquid flow generated by liquid nozzles or the like. The guide structure 3 inside the reaction pipe 25 is provided with a guide groove 321 that can guide the liquid to rotate in a spiral. When the liquid enters the reaction pipe 25, it can flow in a spiral manner without touching the inner wall of the reaction pipe 25, increasing the chance of collision between the liquid and the bubble-generating medium structure 23 and increasing the intensity of the collision. Since the guide structure 3 is only set on the upstream side of the reaction pipe 25, there is no need to provide a baffle that completely separates the liquid flow, reducing the chance of collision between the liquid flow and the guide structure 3. Compared with the case where a baffle is provided, the risk of clogging caused by hair, floating objects or other debris in the liquid is reduced, and the liquid flow is made smoother. Since the guide structure 3 can be easily removed from the pipe or the bubble-generating medium, it can be easily cleaned and disassembled.

[0064] Furthermore, such as Figure 2 , Figure 4 As shown, the bubble generating medium structure 23 is arranged in a columnar structure. A bubble generating medium channel 24 for gas flow is provided inside the bubble generating medium structure 23. The bubble generating medium channel 24 is arranged in a direction parallel to the axial direction of the bubble generating medium structure 23, and the downstream end of the bubble generating medium channel 24 is closed, so that the gas flows directly from the upstream direction to the downstream direction. In a specific embodiment, the bubble generating medium channel 24 is located in the central part of the cross-section of the bubble generating medium structure 23. A plurality of micro-holes 232 are provided on the side wall of the bubble generating medium structure 23. The gas in the bubble generating medium channel 24 forms nanobubbles through the micro-holes 232, and the nanobubbles are released into the liquid in the reaction pipe 25.

[0065] The bubble-generating medium structure 23 is composed of a carbon-based porous material and has a large number of fine pores, i.e., micropores 232, such as... Figure 4 The diameter of the micropores 232 shown ranges from a few micrometers to tens of micrometers. Furthermore, the rotational speed of the bubble-generating medium structure 23 is between 200 r / min and 10000 r / min.

[0066] The bubble-generating medium structure 23 is a conductor, and the bubbles generated from it are negatively charged. In other words, when the conductive bubble-generating medium structure 23 is used, free electrons are added to the nanobubbles, making them negatively charged. This negative charge increases the repulsive force between the bubbles, preventing them from attracting each other and coalescing into a large bubble.

[0067] Carbon-based porous materials are inorganic materials containing only carbon or carbon and ceramics. Furthermore, a thin film several nanometers thick is formed on the surface of the carbon-based porous material; this film is composed of a silicon-containing inorganic film.

[0068] Because the bubble-generating medium structure 23 is formed by porous components of carbon-based material and can rotate at high speed, it can generate a large number of nanobubbles without the need for liquid flow generated by liquid nozzles or the like.

[0069] Furthermore, such as Figure 2 , Figure 3 As shown, the downstream end of the bubble generating medium structure 23 is provided with a second conical portion 231 whose diameter gradually decreases downstream. The cone angle of the second conical portion 231 is in the range of 40° to 90°, that is, the angle between the side wall of the second conical portion 231 and the central axis of the bubble generating medium structure 23 is 20° to 45°, that is, the inclination angle of the side wall of the second conical portion 231 relative to the central axis of the bubble generating medium structure 23 is 20° to 45°.

[0070] Furthermore, the liquid inlet 253 is offset from the axis of the bubble generating medium structure 23.

[0071] The reaction pipe 25 is cylindrical, with a side wall 251 and a circular end wall 252. That is, the reaction pipe 25 is closed by the side wall 251 and the end wall 252. A liquid inlet 253 is provided on the side wall 251. The liquid inlet 253 is connected to a pressure pump 4, which pumps and pressurizes the liquid. The pressurized liquid flows into the reaction pipe 25 from the liquid inlet 253.

[0072] like Figure 2 , Figure 3 As shown, the liquid inlet 253 is located on the side wall 251 of the reaction pipe 25, and its position is offset in an orthogonal direction relative to the axis in the plan view. That is, the liquid inlet 253 is offset by a predetermined length in the front-back direction relative to the axis. In other words, the position facing the liquid inlet 253 is offset relative to the axis of the bubble generating medium structure 23. As described above, the liquid entering from the liquid inlet 253 will not flow in the direction towards the axis of the bubble generating medium structure 23, but will spiral along the side wall 251 and easily flow to the downstream side.

[0073] The reaction conduit 25 is made of rigid resin, such as rigid polyvinyl chloride or polyethylene. Alternatively, the reaction conduit 25 can be made of a carbon-based porous material (manufacturing to prevent liquid leakage). Here, the carbon-based porous material is a composite material containing only carbon or carbon and ceramics, and is an inorganic material. By being made of a carbon-based porous material, the reaction conduit 25 exhibits improved corrosion resistance and acid resistance compared to the case where it is formed of rigid resin.

[0074] Furthermore, such as Figure 2 , Figure 3As shown, the downstream end of the reaction pipe 25 is provided with a first conical portion 254 whose diameter gradually decreases downstream, and the cone angle of the first conical portion 254 ranges from 40° to 90°. That is, the inclination angle of the sidewall of the first conical portion 254 relative to the central axis of the reaction pipe 25 is from 20° to 45°.

[0075] The downstream end of the reaction pipe 25 is processed in such a way that the inner diameter decreases downstream according to the inclination angle of the second cone portion 231 of the bubble generating medium structure 23, and the inclination angle of the first cone portion 254 is set to be equal to the inclination angle of the second cone portion 231, and is set to be from 20° to 45°.

[0076] Because the downstream end of the bubble generating medium structure 23 and the downstream end of the reaction channel 25 are processed into cones with a reduced diameter towards the downstream side, the spiral flow gathers towards the center of the reaction channel 25, so the flow rate is not reduced and the swirling diameter is reduced, thereby generating nanobubbles more effectively.

[0077] Since the first conical portion 254 and the second conical portion 231 have the same cone angle, the distance between the bubble generating medium structure 23 and the reaction pipe 25 remains unchanged, and the cross-sectional area of ​​the fluid flow portion remains unchanged. Through this method, the flow rate is less prone to change and can be released from the reaction pipe 25 without reducing the flow rate.

[0078] Furthermore, such as Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the guide structure 3 includes an outer tube 31 arranged axially along the reaction pipe 25, and inner tubes 32 arranged radially spaced inside the outer tube 31. The inner cavity of the inner tube 32 forms a gas inlet hole 301, and the outlet end of the gas inlet hole is sealed and connected to the bubble generation medium channel 24. A liquid channel portion 302 with an opening towards the downstream side is formed between the inner tube 32 and the outer tube 31. A guide groove 321 for causing the liquid to flow in a spiral manner is provided on the outer wall of the inner tube 32.

[0079] The guide groove 321 is formed spirally on the outer wall of the inner tube 32. In this embodiment, the guide groove 321 is formed by cutting the outer wall of the inner tube 32. It should be noted that in the manufacturing process of the guide groove 321, not only cutting can be performed, but also pressing can be done using a mold.

[0080] Furthermore, such as Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 8 As shown, the outer tube 31 is provided with a notch 33 facing the downstream side, and there is a certain distance between the notch 33 and the liquid inlet 253.

[0081] In this configuration, the liquid flow entering from the liquid inlet 253 passes through the notch 33 and flows downstream along the inner tube 32. Since the guide groove 321 is formed on the outer wall of the inner tube 32, the liquid flow forms a spiral shape and easily flows downstream. By providing the guide structure 3 in this way, the liquid flow entering from the liquid inlet 253 can be guided in a spiral manner. Downstream, as the liquid flows while maintaining the spiral flow created by the guide structure 3, the chance of the liquid flow contacting the bubble-generating medium structure 23 increases. Furthermore, since the liquid flow is not obstructed by plates or the like, the contact opportunity can be increased while maintaining the flow rate.

[0082] Furthermore, such as Figure 1 , Figure 2 , Figure 6 As shown, an upstream end wall 34 is provided at the upstream end of the inner tube 32 and the outer tube 31. The upstream end wall 34 seals the upstream end of the liquid channel 302 and the reaction pipe 25. A gas through hole 341 communicating with the gas inlet hole 301 is provided on the upstream end wall 34. The compression device 22 includes a gas storage container 221 for storing gas. The gas storage container 221 is connected to the gas through hole 341 through a gas channel 223. A check valve 222 is provided on the gas channel 223.

[0083] The liquid passage 302 is shielded from the upstream end of the reaction pipe 25 by the upstream end wall 34. In this configuration, the liquid is confined and does not flow to the upstream side of the guide structure 3.

[0084] The guide structure 3 is a columnar structure with two coaxially arranged circular tubes (outer tube 31 and inner tube 32). The upstream end wall 34 has an outer diameter equal to the inner diameter of the reaction pipe 25, which is used to seal the upstream end of the reaction pipe 25.

[0085] Furthermore, the length of the guide structure 3 along the axial direction of the reaction pipe 25 is less than or equal to 20% of the axial length of the reaction pipe 25. By setting the aforementioned proportion, the chance of the liquid flow coming into contact with the guide structure 3 can be reduced, and the liquid flow can be guided in a spiral manner.

[0086] Furthermore, the radial cross-sectional area of ​​the liquid channel portion 302 (the cross-sectional area on a plane orthogonal to the axial direction of the liquid channel portion 302, i.e., the area formed by the vertical line on...) Figure 9 The area A1 drawn in the figure is the radial cross-sectional area of ​​the outer wall of the inner tube 32 (whose radius is the distance from the axis of the inner tube 32 to the outer peripheral surface). Figure 9 The ratio of the area A2 drawn in the middle is greater than or equal to 1:1 and less than or equal to 2:1. With this configuration, the liquid flowing in from the liquid inlet 253 can easily flow in a spiral manner under the guidance of the inner tube 32 and the outer tube 31.

[0087] Furthermore, such asFigure 2 , Figure 7 As shown, the outlet end of the gas inlet hole 301 is enlarged to form a mating groove 35, and the inlet end of the bubble generating medium channel 24 is provided with a mating protrusion 233, which can be sealed and connected in the mating groove 35; a sealing element 36 is provided between the mating protrusion 233 and the mating groove 35.

[0088] The seal 36 is an annular component used to prevent gas leakage from the guide structure 3. Furthermore, by assembling the guide structure 3 and the bubble-generating medium structure 23 using the seal 36, there is no need to use screws, bolts, or other fasteners to fix the guide structure 3 to the bubble-generating medium structure 23. Moreover, during disassembly, only the mating protrusion 233 needs to be removed, facilitating cleaning and disassembly. Since the guide structure 3 and the bubble-generating medium structure 23 do not require screws or bolts for connection, the nanobubble generating device 100 can be installed even in environments that may corrode metal, such as seawater. Thus, by configuring the mating protrusion 233 and the mating groove 35 together, the portion providing the seal 36 can be made very small, and gas leakage is virtually nonexistent.

[0089] Example 1

[0090] In this embodiment, a method for generating nanobubbles using water from sources such as rivers as liquids and nitrogen as a gas will be described.

[0091] The method for generating nanobubbles using the nanobubble generating device 100 of this invention is as follows:

[0092] First, nitrogen gas is forced in from the compression device 22. The nitrogen gas forced in from the compression device 22 is sent into the reaction pipe 25 of the channel 21 through the gas channel 223. The guide structure 3 is provided at the upstream end of the reaction pipe 25, and supplies nitrogen gas to the bubble generating medium channel 24 in the bubble generating medium structure 23 through the gas inlet 301 of the guide structure 3.

[0093] On the other hand, water from sources such as rivers is drawn up by pressure pump 4 and sent into the interior of reaction pipe 25 through liquid inlet 253. The liquid flowing in from liquid inlet 253 passes through notch 33 and flows downstream along the outer wall of inner pipe 32. Because guide groove 321 is formed on the outer wall of inner pipe 32, the liquid flow becomes spiral-shaped and easily flows downstream (see...). Figure 2 (The black arrow in the image). The liquid flow, flowing downstream in a spiral manner, is further transported downstream along the surface of the bubble-generating medium structure 23.

[0094] Nitrogen gas supplied to the bubble-generating medium channel 24 passes through micropores 232 with diameters ranging from a few μm to tens of μm provided in the bubble-generating medium structure 23, becoming nanobubbles and being released into the liquid. The nanobubbles released into the liquid are dispersed by the surrounding liquid flow ( Figure 3 (Flow in the direction of the middle arrow) separates from the surface. At this time, because the liquid flows in a spiral manner through the guide structure 3, the collision intensity between the surface of the bubble generating medium structure 23 and the liquid flow is higher than that in the case of straight liquid flow, and nanobubbles are more easily generated.

[0095] Because the downstream ends of the bubble-generating medium structure 23 and the reaction conduit 25 are processed into cones with decreasing diameters towards the downstream side, the helical flow converges towards the center of the reaction conduit 25, thus not reducing the flow velocity. The reduced swirling diameter further facilitates the more efficient generation of nanobubbles. Since the first cone portion 254 and the second cone portion 231 have the same cone angle, the distance between the bubble-generating medium structure 23 and the reaction conduit 25 remains constant, and the cross-sectional area of ​​the fluid flow portion remains unchanged. Through this method, the flow velocity is less prone to change and can be released from the reaction conduit 25 without reducing the flow velocity.

[0096] In this configuration, the nanobubbles move into the liquid independently and do not merge with nanobubbles generated later or with nanobubbles generated around the micropore 232.

[0097] Because the bubble-generating medium structure 23 is formed from a porous component of carbon-based material and can rotate at high speed, a large number of nanobubbles can be generated without the need for liquid flow generated by liquid nozzles or the like. Furthermore, due to the provision of the guide structure 3, the flow of liquid flowing in from the liquid inlet 253 can be guided in a spiral manner. Then, on the downstream side, as the liquid flows while maintaining the spiral flow created by the guide structure 3, the intensity of the collision between the liquid and the bubble-generating medium structure 23 increases.

[0098] Example 2

[0099] The nanobubble water prepared using the nanobubble generating device 100 of this invention has the following nanobubble size distribution: Figure 10 As shown, based on the three sets of data from parallel tests, after fitting the data mean to the graph, it can be seen that the particle size distribution of the bubbles is mainly 82nm, 90nm, 122nm, 133nm, 162nm, 194nm, 264nm, 316nm, and 364nm.

[0100] According to statistics (see Table 1 below for bubble data statistics), the average value of bubble distribution in the liquid is 135.9±6.6nm, the mode is 125.2±23.5nm, the SD is 56.1±11.6nm, and the D... 10 It is 77.9±4.0nm, D50 The wavelength is 125.6 ± 3.9 nm, D 90 The particle size was 188.8 ± 9.8 nm, and the concentration was 9.70e^09 ± 1.11e^09 particles / ml.

[0101] Table 1: Bubble Data Statistics Table

[0102] Statistics Mean ± standard error Mean 135.9 ± 6.6 nm Mode 125.2 ± 23.5 nm SD 56.1 ± 11.6 nm [00000D 10 ]] 77.9 ± 4.0 nm [00000D 50 ]]> 125.6 ± 3.9 nm <![CDATA[D 90 ]]> 188.8 ± 9.8 nm Concentration 9.70e^09 ± 1.11e^09 particles / μl

[0103] As described above, the nanobubble generating device of this invention has the following beneficial effects:

[0104] In this invention, the bubble-generating medium structure can generate a large number of nanobubbles through high-speed rotation, eliminating the need for liquid flow generated by liquid nozzles or the like. A guide groove is provided on the guide structure inside the reaction pipe to guide the liquid in a spiral rotation. When the liquid enters the reaction pipe, it can flow in a spiral manner without touching the inner wall of the pipe, increasing the chance of collision between the liquid and the bubble-generating medium structure, and increasing the intensity of the collision. Since the guide structure is only located on the upstream side of the reaction pipe, there is no need to provide a baffle that completely separates the liquid flow, reducing the chance of collision between the liquid flow and the guide structure. Compared with the case of a baffle, this reduces the risk of blockage caused by hair, floating objects, or other debris in the liquid, and makes the liquid flow smoother. Because the guide structure can be easily removed from the pipe or the bubble-generating medium, it can be easily cleaned and disassembled.

[0105] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A nano bubble generating device, characterized by, The application relates to a reaction tube for generating nanobubbles, which comprises a liquid inlet arranged on the side wall of the reaction tube; a compression device for pressurized delivery of gas to the reaction tube; a bubble generating medium structure rotatably arranged in the reaction tube, which makes the gas delivered by the compression device form nanobubbles and releases the nanobubbles into the liquid in the reaction tube; a guide structure detachably arranged on the upstream side of the reaction tube, which is arranged axially opposite to the liquid inlet of the reaction tube, and a guide groove arranged on the guide structure for guiding the spiral rotating flow of liquid to the downstream side. The bubble generating medium structure is provided with a bubble generating medium channel for gas flow, which is arranged along the axial direction of the bubble generating medium structure, and the downstream end of the bubble generating medium channel is closed; the side wall of the bubble generating medium structure is provided with a plurality of micro holes, and the gas in the bubble generating medium channel forms nanobubbles through the micro holes, and the nanobubbles are released into the liquid in the reaction tube. The liquid inlet is arranged offset to the axis of the bubble generating medium structure. The guide structure comprises an outer tube arranged along the axial direction of the reaction tube, and an inner tube is radially spaced in the outer tube, the inner cavity of the inner tube forms a gas inflow hole, and the outlet end of the gas inflow hole is sealed and communicated with the bubble generating medium channel; the liquid channel part opening to the downstream side is formed between the inner tube and the outer tube, and the outer wall of the inner tube is provided with a guide groove for spiral rotating flow of liquid. The outer tube is provided with a notch part towards the downstream side.

2. The nano bubble generating apparatus according to claim 1, wherein The end part of the inner tube and the outer tube on the upstream side is provided with an upstream end wall, which seals the upstream end of the liquid channel part and the reaction tube, and the upstream end wall is provided with a gas through hole communicated with the gas inflow hole; the compression device comprises a gas storage container for storing gas, and the gas storage container is communicated with the gas through hole through a gas channel.

3. The nano bubble generation apparatus according to claim 2, wherein The length of the guide structure along the axial direction of the reaction tube is less than or equal to 20% of the axial length of the reaction tube.

4. The nano bubble generating apparatus according to claim 2, wherein The ratio of the radial cross-sectional area of the liquid channel part to the radial cross-sectional area of the outer wall of the inner tube is greater than or equal to 1:1 and less than or equal to 2:

1.

5. The nano bubble generation apparatus according to claim 4, wherein The outlet end of the gas inflow hole is expanded to form a matching groove, the inlet end of the bubble generating medium channel is provided with a matching protrusion, the matching protrusion can be sealingly connected in the matching groove; a sealing element is arranged between the matching protrusion and the matching groove.

6. The nano bubble generating apparatus according to claim 4, wherein The end part of the reaction tube on the downstream side is provided with a first taper part with a diameter gradually decreasing towards the downstream side, the end part of the bubble generating medium structure on the downstream side is provided with a second taper part with a diameter gradually decreasing towards the downstream side, the taper angles of the first taper part and the second taper part are the same, and the taper angle ranges from 40 DEG to 90 DEG.

7. The nano bubble generating apparatus according to claim 4, wherein ​ 8. The nano bubble generating apparatus according to claim 4, wherein ​ 9. The nano bubble generating apparatus according to claim 4, wherein ​ 10. The nano bubble generating apparatus according to claim 2, wherein ​

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