Disc-type adjustable jet flow micro-nano bubble generation method and disc-type adjustable jet flow micro-nano bubble generation equipment

Abstract

The invention relates to the technical field of micro-nano bubbles, and discloses a disc-type adjustable jet flow micro-nano bubble generation method and equipment, and the disc-type adjustable jet flow micro-nano bubble generation equipment comprises a nozzle for generating high-speed atomized water flow, a static flow guide unit and a Venturi jet flow shear mixing unit. Based on the phenomena of jet mixing and gas-liquid interface in fluid dynamics, in combination with various fluid dynamics principles of cavitation effect, Venturi effect, shearing and crushing, impinging stream mixing and static mixing, gas self-absorption is realized through the annular flow channel and adjustment of the gap of the cavity, bubbles can be more efficiently generated, the uniformity of the bubbles is improved, and the bubble generation efficiency is improved. And the formation and the stability of the microbubbles are optimized. Meanwhile, the disc type structure is compact, is easier to expand compared with a pipe type structure, is suitable for large-flow treatment, is convenient to process, and is suitable for batch production.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-nano bubble technology, and in particular to a method and device for generating jet micro-nano bubbles with a disk-adjustable type. Background Art

[0002] Micro-nano bubbles refer to tiny bubbles with a radius between 0.1 and 50 μm. Micro-nano bubbles have special properties beyond ordinary bubbles, such as a large specific surface area, a slow rising speed of bubbles, a high interfacial potential, a large internal pressure, the ability to generate a large number of free radicals, a high mass transfer efficiency, and a high gas dissolution rate, which are unique properties different from ordinary large bubbles. In recent years, it has attracted wide attention and began to be applied in the fields of chemical engineering, materials, environmental engineering, biology, and pharmaceutical delivery.

[0003] Currently, the main methods for generating micro-nano bubbles are as follows: ultrasonic bubble generation method, dispersed air method, electrolytic bubble precipitation method, chemical reaction method, and microchannel method, etc. Although many progresses have been made in the technology of micro-nano bubbles, there are still some challenges: one is the bubble stability problem. Micro-nano bubbles are prone to coalescence and rupture, especially in a dynamic environment, and the life cycle of bubbles is short, resulting in the failure of bubbles during application. The second is the problem of controlling the bubble size. Although existing methods can generate micro-nano scale bubbles, the bubble size distribution is uneven, and it is difficult to precisely control the single size of bubbles, which limits the effectiveness of its specific applications. The third is the low generation efficiency. The bubble generation efficiency of many existing generation methods is relatively low, especially in large-scale production, with complex operations and high costs. The fourth is that some tube jet generators are not easy to process, and the processing accuracy requirements are relatively high. The fifth is the limited application fields. Although there have been breakthroughs in water treatment, drug delivery, etc., it still needs to be further verified and optimized in actual industrial applications. Summary of the Invention

[0004] To solve the technical problems existing in the prior art, the present invention provides a method and device for generating jet micro-nano bubbles with a disk-adjustable type.

[0005] The present invention is implemented by the following technical solutions: A device for generating jet micro-nano bubbles with a disk-adjustable type includes a nozzle for generating a high-speed atomized water flow, a static flow guiding unit, and a Venturi jet shear mixing unit. The static flow guiding unit and the Venturi jet shear mixing unit are circumferentially distributed along the axis perpendicular to the jet unit.

[0006] Furthermore, the nozzle adopts a conical nozzle.

[0007] Furthermore, the static flow guiding unit includes a pre-mixing chamber opposite to the output end of the nozzle, and a flow guiding member arranged at the bottom of the pre-mixing chamber. The flow guiding member adopts any one of a flow guiding cone or a reverse excitation jet cavity.

[0008] Furthermore, the Venturi jet shear mixing unit is a Venturi ring, which includes a contraction chamber, a throat chamber, and a diffusion chamber that are connected in sequence. Annular air chambers are provided on the upper and lower sides of the throat chamber. A compression spring is arranged in the diffusion chamber. The compression spring is sleeved with a hollow screw. An air passage penetrates through the screw. An air passage I is arranged between the air passage and the air chamber. Nuts for fixing are threadedly sleeved at both ends of the screw. An air passage II for supplying a shearing air flow to the throat chamber is opened between the air chamber and the throat chamber. An air pipe for supplying air is arranged in the air chamber.

[0009] Furthermore, the air passage II is a plurality of air holes that are evenly distributed up and down and are inclined or perpendicular to the inner wall of the air chamber.

[0010] Furthermore, the length ratio of the contraction chamber, the throat chamber, and the diffusion chamber is 1.0 - 2.0:1:1.5 - 3.0.

[0011] Furthermore, plugs are arranged at both ends of the screw. The external thread of the screw is arranged on the outer rings of both ends thereof. The compression spring is a compressed spring.

[0012] A method for generating jet micro-nano bubbles with a disk type adjustable includes the following steps:

[0013] Including the following steps:

[0014] Step S1: Form a high-speed atomized water flow by using a nozzle;

[0015] Step S2: Mix and jet out the high-speed atomized water flow by using a static diversion unit;

[0016] Step S3: Use the Venturi jet shear mixing unit to perform gas-water shear mixing on the jet water mist in combination with the inner shear method, adjust the gap of the cavity according to different water flow pressures, control the gas-water mixing intensity, improve the jetting effect and dispersion of the bubbles, and optimize the generation and stability of the micro-nano bubbles.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The present invention adopts a gas-water jet design, which is beneficial to shearing the fluid and forming strong turbulence, promoting gas-liquid mixing, being able to keep the micro-nano bubbles from coalescing during the diffusion process, reducing the countercurrent separation phenomenon, improving the jetting effect and dispersion of the bubbles, and further optimizing the formation and stability of the micro-nano bubbles.

[0019] 2. The present invention adjusts the gap of the cavity according to different water flow pressures, controls the gas-water mixing intensity, improves the jetting effect and dispersion of the bubbles, and optimizes the generation and stability of the micro-nano bubbles.

[0020] 3. The present invention can achieve self - suction of gas, guide the formation of bubbles, and at the same time adopt an internal air chamber design to further increase the formation quantity and distribution uniformity of micro - nano bubbles and the flexibility of operation.

[0021] 4. The static flow - guiding of the present invention adopts a rotating flow - guiding cone water flow distribution jet design. Without external energy input, it can increase efficiency only through the geometric design of the flow - guiding vane, which conforms to the concept of green engineering. It forms a "radial + tangential" composite flow, which can cooperate with the rotating jet to form a centrifugal acceleration effect. The centrifugal low - pressure effect makes the rotating water flow form a radial pressure gradient due to centrifugal force in the contraction section and the throat section, further reducing the central pressure, promoting the generation of cavitation nuclei, being conducive to shearing the fluid and forming strong turbulence. The swirling flow prolongs the gas residence time, improves the gas dissolution rate, promotes gas - liquid mixing, and the way of rotating entry has a self - cleaning effect, reducing sediment attachment and improving the anti - clogging performance; The static flow - guiding of the present invention adopts a reverse - excitation jet cavity and a water flow distribution jet design with a reverse flow - guiding cone, which can form an acceleration effect, is conducive to mutual impact, shearing the fluid and forming strong turbulence, and promoting gas - liquid mixing.

[0022] 5. The advantage of the disc - type cavity is that it has a compact structure. The disc - type structure is usually easier to expand than the tube - type, suitable for large - flow processing, and is easy to process, especially suitable for mass production.

[0023] The present invention is based on the "jet mixing" and "gas - liquid interface" phenomena in fluid dynamics, combines multiple fluid dynamics principles such as cavitation effect, Venturi effect, shear fragmentation, impinging stream mixing, and static mixing. By adjusting the gap of the annular flow channel and the cavity, it realizes self - suction of gas, helps to generate bubbles more efficiently, helps to achieve uniform bubble distribution, and optimizes the formation and stability of micro - bubbles. At the same time, it has a compact structure, is easy to process, and is suitable for mass production. Brief Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a disc - type adjustable jet micro - nano bubble generating device provided by the present invention;

[0025] Figure 2 It is a schematic structural diagram of a disc - type adjustable jet micro - nano bubble generating device with a reverse - excitation jet cavity provided by the present invention;

[0026] Figure 3 It is a schematic structural diagram of a conical nozzle provided by the present invention;

[0027] Figure 4 It is a schematic structural diagram of a flow - guiding cone provided by the present invention;

[0028] Figure 5 It is a schematic structural diagram of a reverse - excitation jet cavity provided by the present invention.

[0029] Main Symbol Explanation:

[0030] 1. Nozzle; 2. Static flow guiding unit; 3. Venturi jet shear mixing unit; 1-2. Conical nozzle; 121. First contraction cavity; 122. First nozzle; 21. Premixing chamber; 22. Flow guiding member; 2-1. Flow guiding cone; 2-2. Reverse excitation jet cavity; 211. Cone; 212. Flow guiding vane; 221. Reflection cone; 222. Reflection cavity; 32. Contraction cavity; 33. Throat cavity; 34. Diffusion cavity; 35. Air chamber; 36. First air passage; 37. Second air passage; 38. Air pipe; 39. Compression spring; 310. Screw; 311. Air passage; 312. Nut. Detailed implementation manners

[0031] Next, in combination with the accompanying drawings and specific implementation manners, the present invention will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0032] Embodiment 1:

[0033] Please refer to Figure 1-2 As shown, a disk-type adjustable jet micro-nano bubble generating device in this embodiment includes a nozzle 1 for generating high-speed atomized water flow, a static flow guiding unit 2, and a Venturi jet shear mixing unit 3. The static flow guiding unit 2 and the Venturi jet shear mixing unit 3 are circumferentially distributed along the axis perpendicular to the jet unit 1;

[0034] The water flow is pumped into the nozzle 1 through a pump and a water pipe, and then a high-speed atomized water flow is ejected from the nozzle 1. The high-speed atomized water flow is ejected through the water jet unit 2, and the air-water mixing unit 3 is used to perform air-water mixing and discharge in the inner shear mode of the jet water mist. At the same time, the flow rate and flow of the discharged air-water are adjusted by adjusting the gap of the Venturi jet shear mixing unit 3; high-speed shearing of the water flow is achieved, air-liquid mixing and fragmentation effects are realized, and micro-nano scale bubbles are stably formed, which can effectively improve the generation efficiency and uniformity of bubbles.

[0035] Embodiment 2:

[0036] As Figure 3 shown, the nozzle 1 adopts a conical nozzle 1-2. Among them, the conical nozzle 1-2 includes a first contraction cavity 121 and a first nozzle 122.

[0037] Embodiment 3:

[0038] As Figure 1 Figure 2As shown in the figure, the static flow guiding unit 2 includes a pre-mixing chamber 21 opposite to the output end of the nozzle 1 and a flow guiding member 22 arranged at the bottom of the pre-mixing chamber 21. The flow guiding member 22 adopts any one of a flow guiding cone 2-1 or a reverse excitation jet chamber 2-2.

[0039] Example 4:

[0040] As Figure 4 shown in the figure, the flow guiding cone 2-1 includes a cone body 211 and a flow guiding vane 212 with a spiral structure arranged on the outer side of the cone body 211; the high-speed atomized water flow ejected from the output end of the nozzle 1 is spirally guided and ejected by the cone body 211 and the flow guiding vane 212 on the flow guiding cone 2-1 and is dispersed into the contraction chamber 32.

[0041] Example 5:

[0042] As Figure 5 shown in the figure, the reverse excitation jet chamber 2-2 includes an inverted reflection cone 221 and a reflection chamber 222 opened at the top of the reflection cone 221; wherein, the bottom of the reflection cone 221 is V-shaped, and the top outlet of the reflection chamber 222 is larger than the inlet of the bottom output end of the nozzle 1; the high-speed atomized water flow ejected from the output end of the nozzle 1 enters the reflection chamber 222 at the top of the reflection cone 221 downward, and the high-speed atomized water flow is reflected under the action of the reflection chamber 222 and then flows into the contraction chamber 32.

[0043] Example 6:

[0044] As Figure 1-Figure 2 shown in the figure, the Venturi jet shear mixing unit 3 is annular and includes a contraction chamber 32, a throat chamber 33 and a diffusion chamber 34 which are connected in sequence. Annular air chambers 35 are opened on both sides of the throat chamber 33. A compression spring 39 is arranged in the diffusion chamber 34. The compression spring 39 is sleeved with a hollow screw 310. The screw 310 penetrates through an air duct 311. An air path 36 is arranged between the air duct 311 and the air chamber 35. Nuts 312 for fixing are threadedly sleeved at both ends of the screw 310. An air path 37 for supplying shear air flow to the throat chamber 33 is opened between the air chamber 35 and the throat chamber 33. An air pipe 38 for supplying air is arranged in the air chamber 35.

[0045] The air path 37 is a plurality of uniformly distributed pores arranged vertically up and down. The air path 37 is inclined or perpendicular to the inner wall of the air chamber 35.

[0046] The length ratio of the contraction chamber 32, the throat chamber 33 and the diffusion chamber 34 is 1.0 - 2.0:1:1.5 - 3.0.

[0047] Seals are arranged at both ends of the screw 310. The external thread of the screw 310 is arranged on the outer rings at both ends. The compression spring 39 is a compressed spring.

[0048] Example 7:

[0049] A method for generating jet micro-nano bubbles with a disc type adjustable structure, comprising the following steps:

[0050] Step S1: Form a high-speed atomized water flow by using a nozzle 1;

[0051] Step S2: Mix and jet out the high-speed atomized water flow by using a static diversion unit 2;

[0052] Step S3: Use a Venturi jet shear mixing unit 3 to perform gas-water shear mixing on the jet water mist in combination with the inner shear method, and control the changes in speed and pressure by adjusting the gap of the cavity to optimize the generation and stability of micro-nano bubbles.

[0053] The present invention adopts a gas-water jet design, which is beneficial to shearing the fluid and forming strong turbulence, promoting gas-liquid mixing, capable of keeping the micro-nano bubbles from coalescing during the diffusion process, reducing the countercurrent separation phenomenon, improving the ejection effect and dispersion of the bubbles, and further optimizing the formation and stability of the micro-nano bubbles. The present invention adjusts the gap of the cavity according to different water flow pressures, controls the gas-water mixing intensity, improves the ejection effect and dispersion of the bubbles, and optimizes the generation and stability of the micro-nano bubbles. The present invention can realize self-aspiration of gas, guide the formation of bubbles, and at the same time adopt an internal air chamber design to further improve the formation quantity, distribution uniformity and operation flexibility of the micro-nano bubbles. The static diversion of the present invention adopts a rotating diversion cone water flow distribution jet design, which does not require external energy input, and can increase efficiency only through the geometric design of the diversion vane, conforms to the concept of green engineering, forms a "radial + tangential" composite flow, can cooperate with the rotating jet to form a centrifugal acceleration effect, and the centrifugal low-pressure effect rotating water flow forms a radial pressure gradient due to the centrifugal force in the contraction section and the throat section, and the central pressure is further reduced, promoting the generation of cavitation nuclei, being beneficial to shearing the fluid and forming strong turbulence, the swirling flow prolongs the gas residence time, improves the gas dissolution rate, promotes gas-liquid mixing, and the rotating entry method has a self-cleaning effect, reducing the attachment of sediments and improving the anti-blocking performance; the static diversion of the present invention adopts a reverse excitation jet cavity and a water flow distribution jet design with a reverse diversion cone, which can form an acceleration effect, is beneficial to mutual impact, shearing the fluid and forming strong turbulence, and promoting gas-liquid mixing. The advantage of the disc type cavity lies in its compact structure, being easier to expand than the tube type, suitable for large flow rate processing, and being easy to process, especially suitable for batch production.

[0054] The present invention is based on the "jet mixing" and "gas-liquid interface" phenomena in fluid dynamics, combines multiple fluid dynamics principles such as cavitation effect, Venturi effect, shear fragmentation, impinging stream mixing, and static mixing, and realizes gas self-aspiration through an annular flow channel and adjusting the gap of the cavity, which helps to generate bubbles more efficiently, helps to achieve uniform bubble distribution, and optimizes the formation and stability of micro-bubbles. At the same time, it is suitable for large flow rate processing, and is easy to process, especially suitable for batch production.

[0055] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A disk-type adjustable jet micro-nano bubble generating device, characterized in that, It includes a nozzle (1) for generating a high-speed atomized water flow, a static diversion unit (2) and a Venturi jet shear mixing unit (3). The static diversion unit (2) and the Venturi jet shear mixing unit (3) are circumferentially distributed along an axis perpendicular to the jet unit (1).

2. The jet micro-nano bubble generating device with a disk type adjustable as claimed in claim 1, wherein The nozzle (1) adopts a conical nozzle (1-2).

3. The jet micro-nano bubble generating device with a disk type adjustable as claimed in claim 1, wherein The static diversion unit (2) includes a pre-mixing chamber (21) opposite to the output end of the nozzle (1), and a diversion member (22) arranged at the bottom of the pre-mixing chamber (21); the diversion member (22) adopts either a diversion cone (2-1) or a reverse excitation jet cavity (2-2).

4. The jet micro-nano bubble generating device with a disc type adjustable according to claim 1, characterized in that, The Venturi jet shear mixing unit (3) is a Venturi ring, which includes a contraction chamber (32), a throat chamber (33) and a diffusion chamber (34) connected in sequence. Annular air chambers (35) are arranged on the upper and lower sides of the throat chamber (33). A compression spring (39) is arranged in the diffusion chamber (34). The compression spring (39) is sleeved with a hollow screw (310). The screw (310) is penetrated by an air duct (311). An air path one (36) is arranged between the air duct (311) and the air chamber (35). Nuts (312) for fixing are threadedly sleeved at both ends of the screw (310). An air path two (37) for supplying shear air flow to the throat chamber (33) is arranged between the air chamber (35) and the throat chamber (33). An air pipe (38) for supplying air is arranged on the air chamber (35).

5. The jet micro-nano bubble generating device with a disc type adjustable as claimed in claim 4, wherein The air path two (37) is a number of uniformly distributed pores arranged vertically up and down. The air path two (37) is inclined or perpendicular to the inner wall of the air chamber (35).

6. The device for generating jet micro-nano bubbles with a disk type adjustable as claimed in claim 4, characterized in that, The length ratio of the contraction chamber (32), the throat chamber (33) and the diffusion chamber (34) is 1.0 - 2.0:1:1.5 - 3.

0.

7. The jet micro-nano bubble generating device with a disc type adjustable as claimed in claim 4, wherein Both ends of the screw (310) are provided with plugs. The external thread of the screw (310) is arranged on the outer rings at both ends. The compression spring (39) adopts a compressed spring.

8. A method for generating jet micro-nano bubbles with a disk-type adjustable structure, which uses the generating device described in claim 1, and is characterized in that, It includes the following steps: Step S1: Use the nozzle (1) to form a high-speed atomized water flow; Step S2: Use the static diversion unit (2) to mix and jet out the high-speed atomized water flow; Step S3: Use the Venturi jet shear mixing unit (3) to conduct gas-water shear mixing on the jet water mist by combining the inner shear method, adjust the gap of the cavity according to different water flow pressures, control the gas-water mixing intensity, improve the ejection effect and dispersion of bubbles, and optimize the generation and stability of micro-nano bubbles.

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