阅读说明：本技术 一种纳米气泡的发生装置及纳米气泡的产生方法 (Nano bubble generating device and nano bubble generating method ) 是由 杨学良 于 2021-09-22 设计创作，主要内容包括：本发明涉及纳米气泡的生成设备技术领域,特指一种纳米气泡的发生装置及纳米气泡的产生方法；其中纳米气泡的发生装置是：在外壳体上设置有进气、进液口、混合气液出口,在外壳体内腔间隔设置有一级、二级固定挡板,一级、二级固定挡板将外壳体内腔分隔成旋流腔室、涡流腔室及混流腔室,进气、进液口与旋流腔室连通,混合气液出口与混流腔室连通,在一级、二级固定挡板上分别设置有一级、二级喷嘴,一级喷嘴内设置有一级离心叶轮,二级喷嘴内设置有二级离心叶轮,一级离心叶轮、二级离心叶轮安装在传动轴上并随传动轴转动,传动轴由动力源驱动转动；本发明应用范围广、性能佳。(The invention relates to the technical field of nano bubble generating equipment, in particular to a nano bubble generating device and a nano bubble generating method; wherein the generating device of the nanometer bubble is: the outer shell is provided with an air inlet, a liquid inlet and a mixed gas-liquid outlet, a primary fixed baffle and a secondary fixed baffle are arranged in the inner cavity of the outer shell at intervals, the primary fixed baffle and the secondary fixed baffle divide the inner cavity of the outer shell into a rotational flow chamber, a vortex chamber and a mixed flow chamber, the air inlet and the liquid inlet are communicated with the rotational flow chamber, the mixed gas-liquid outlet is communicated with the mixed flow chamber, a primary nozzle and a secondary nozzle are respectively arranged on the primary fixed baffle and the secondary fixed baffle, a primary centrifugal impeller is arranged in the primary nozzle, a secondary centrifugal impeller is arranged in the secondary nozzle, the primary centrifugal impeller and the secondary centrifugal impeller are arranged on a transmission shaft and rotate along with the transmission shaft, and the transmission shaft is driven to rotate by a power source; the invention has wide application range and good performance.)

1. A generation device of nanobubbles, comprising an outer shell (1), characterized in that: the device is characterized in that an air inlet, a liquid inlet and a mixed gas-liquid outlet (10) are arranged on an outer shell (1), a primary fixed baffle (11) and a secondary fixed baffle (12) are arranged in the inner cavity of the outer shell (1) at intervals, the primary fixed baffle (11) and the secondary fixed baffle (12) separate the inner cavity of the outer shell (1) into a cyclone chamber (4), a vortex chamber (8) and a mixed flow chamber (9), the air inlet and the liquid inlet are communicated with the cyclone chamber (4), the mixed gas-liquid outlet (10) is communicated with the mixed flow chamber (9), a primary nozzle (71) is arranged on the primary fixed baffle (11) or the outer shell (1), a secondary nozzle (72) is arranged on the secondary fixed baffle (12) or the outer shell (1), a primary centrifugal impeller (51) accommodating cavity is arranged in the primary nozzle (71), a primary centrifugal impeller (51) accommodating cavity is arranged in the primary centrifugal impeller accommodating cavity, the two-stage nozzle is characterized in that a two-stage centrifugal impeller accommodating cavity is formed in the two-stage nozzle (72), a two-stage centrifugal impeller (52) is arranged in the two-stage centrifugal impeller accommodating cavity, the one-stage centrifugal impeller (51) and the two-stage centrifugal impeller (52) are installed on the transmission shaft (2) and rotate along with the transmission shaft (2), and the transmission shaft (2) is driven by a power source to rotate.

2. A nanobubble generating apparatus according to claim 1, characterized in that: the primary nozzle (71) and the secondary nozzle (72) comprise hollow cylindrical main bodies, more than one circle of injection holes are arranged on the main bodies along the radial direction, and the injection holes are of Venturi tube structures.

3. A nanobubble generating apparatus according to claim 2, characterized in that: the injection hole is provided with one or two circles.

4. A nanobubble generating apparatus according to claim 3, characterized in that: each circle of the injection holes is formed by 30-50 micropores.

5. A nanobubble generating apparatus according to claim 1, characterized in that: the centrifugal impeller is characterized in that a first-stage air guide sleeve (61) is arranged outside the first-stage centrifugal impeller (51), the first-stage air guide sleeve (61) is arranged on the first-stage fixed baffle (11), a second-stage air guide sleeve (62) is arranged outside the second-stage centrifugal impeller (52), and the second-stage air guide sleeve (62) is arranged on the second-stage fixed baffle (12).

6. A nanobubble generating apparatus according to claim 5, characterized in that: the outer shell (1) is of a hollow cylinder structure, and the outer shell (1), the first-stage centrifugal impeller (51), the first-stage air guide sleeve (61), the second-stage centrifugal impeller (52), the second-stage air guide sleeve (62), the first-stage nozzle (71), the second-stage nozzle (72) and the transmission shaft (2) are coaxially arranged.

7. A nanobubble generating apparatus according to claim 1, characterized in that: the air inlet, the liquid inlet and the mixed gas-liquid outlet (10) are respectively provided with a bypass pipe, and the bypass pipe is connected with the liquid storage device.

8. A nanobubble generating apparatus according to claim 1, characterized in that: one end of the transmission shaft (2) extends out of the outer shell (1), and a sealing device is arranged between the outer shell (1) and the transmission shaft (2).

9. A nanobubble generating apparatus according to claim 1, characterized in that: the air inlet and the liquid inlet are an inlet for simultaneously introducing air and liquid or two inlets which are respectively an air inlet and a liquid inlet.

10. A nanobubble generating method of the nanobubble generating apparatus of any one of claims 1 to 9, characterized in that: the method comprises the following steps:

step 1: the power source drives the transmission shaft (2) to rotate, the first-stage centrifugal impeller (51) and the second-stage centrifugal impeller (52) are driven to rotate at a high speed, the first-stage centrifugal impeller (51) rotates in the cyclone chamber (4) to generate high-speed and high-pressure cyclone in the cyclone chamber (4), a negative pressure area is generated in the center part of the high-speed and high-pressure cyclone, and target air flow and liquid flow are sucked into the cyclone chamber (4) from the air inlet and the liquid inlet simultaneously;

step 2: when the target gas flow and liquid flow are simultaneously sucked into the cyclone chamber (4) from the gas inlet and the liquid inlet in the step 1, under the action of the kinetic energy of the primary centrifugal impeller (51), the water flow and the gas flow form high-pressure vortex and turbulence, so that gas-liquid two-phase fluid is rotationally mixed and collided at high speed, the gas and the liquid are sheared and decomposed, and the gas dissolved in the liquid is released to generate micro bubbles;

and step 3: the micro bubbles in the step 2 are sprayed from the primary nozzle (71) and enter the vortex chamber (8), when the pressure of the micro bubbles is lower than the saturated vapor pressure in the liquid, the liquid is locally flash evaporated to generate a plurality of cavities, and the liquid-gas flow is sheared to form ultramicro bubbles;

and 4, step 4: pressurizing the ultramicro bubbles in the step (3) again through a secondary centrifugal impeller (52), wherein the ultramicro bubbles generate strong hydraulic impact force and increase the flow velocity, and eddy current is generated inside;

and 5: the mixed liquid is sprayed to the mixed flow chamber (9) at a high speed through the secondary nozzle (72), the flow speed and the pressure of the ultramicro bubbles are sharply reduced, the liquid is locally cooled and boiled, and the gas dissolved in the ultramicro bubbles is released and generates nano bubbles.

Technical Field

The invention relates to the technical field of nano bubble generating equipment, in particular to a nano bubble generating device and a nano bubble generating method.

Background

"Nanobubbles" (ultra-fine bubbles), which are nanoscale gases in aqueous solutions, can change the normal properties of water. Bubbles having a diameter of 50 microns or less are referred to as microbubbles, and bubbles having a diameter of 100 nm or less are referred to as nanobubbles, as defined by the international organization for standardization (ISO).

"nanobubbles" have physical and chemical properties not possessed by conventional bubbles. The characteristics enable the treated nano bubbles to have unique functions, so that the nano bubbles have obvious effect on improving water quality and are widely applied to the fields of industrial and agricultural production, environmental management and the like.

The invention content is as follows:

the invention aims to provide a nano bubble generating device with wide application range and good performance and a nano bubble generating method.

The invention is realized by the following steps:

one of the purposes of the invention is to provide a nano-bubble generating device, which comprises an outer shell, wherein an air inlet, a liquid inlet and a mixed gas-liquid outlet are arranged on the outer shell, a primary fixed baffle and a secondary fixed baffle are arranged in the inner cavity of the outer shell at intervals, the primary fixed baffle and the secondary fixed baffle divide the inner cavity of the outer shell into a rotational flow chamber, a vortex chamber and a mixed flow chamber, the air inlet and the liquid inlet are communicated with the rotational flow chamber, the mixed gas-liquid outlet is communicated with the mixed flow chamber, a primary nozzle is arranged on the primary fixed baffle or the outer shell, a secondary nozzle is arranged on the secondary fixed baffle or the outer shell, a primary centrifugal impeller accommodating cavity is arranged in the primary nozzle, a primary centrifugal impeller is arranged in the primary centrifugal impeller accommodating cavity, a secondary centrifugal impeller accommodating cavity is arranged in the secondary nozzle, and a secondary centrifugal impeller is arranged in the secondary centrifugal impeller accommodating cavity, the first-stage centrifugal impeller and the second-stage centrifugal impeller are arranged on the transmission shaft and rotate along with the transmission shaft, and the transmission shaft is driven to rotate by the power source.

In the above apparatus for generating nanobubbles, the primary nozzle and the secondary nozzle comprise a hollow cylindrical body, and the body is provided with at least one circle of radially arranged injection holes, wherein the injection holes are venturi tube structures.

In the above-mentioned apparatus for generating nanobubbles, the injection hole is provided with one or two circles.

In the above-mentioned nano-bubble generating apparatus, each circle of the injection holes is formed by 30 to 50 micro-holes.

In the above apparatus for generating nanobubbles, the first centrifugal impeller is provided with a first air guide sleeve, the first air guide sleeve is disposed on the first fixed baffle, the second centrifugal impeller is provided with a second air guide sleeve, and the second air guide sleeve is disposed on the second fixed baffle.

In the above apparatus for generating nanobubbles, the outer shell is a hollow cylinder structure, and the outer shell, the first-stage centrifugal impeller, the first-stage air guide sleeve, the second-stage centrifugal impeller, the second-stage air guide sleeve, the first-stage nozzle, the second-stage nozzle, and the transmission shaft are coaxially disposed.

In the above apparatus for generating nanobubbles, the air inlet, the liquid inlet, and the mixed gas-liquid outlet are respectively provided with a bypass pipe, and the bypass pipe is connected to the liquid storage device.

In the above apparatus for generating nano-bubbles, one end of the transmission shaft extends out of the outer shell, and a sealing device is disposed between the outer shell and the transmission shaft.

In the above apparatus for generating nanobubbles, the air inlet and the liquid inlet are an inlet for simultaneously introducing air and liquid, or two inlets, which are an air inlet and a liquid inlet respectively.

Another object of the present invention is to provide a nanobubble generating method, comprising the steps of:

step 1: the power source drives the transmission shaft to rotate, the first-stage centrifugal impeller and the second-stage centrifugal impeller are driven to rotate at a high speed, the first-stage centrifugal impeller rotates in the cyclone chamber to generate high-speed and high-pressure cyclone in the cyclone chamber, a negative pressure area is generated in the center part of the high-speed and high-pressure cyclone, and target air flow and liquid flow are sucked into the cyclone chamber from the air inlet and the liquid inlet at the same time;

step 2: when the target gas flow and liquid flow are simultaneously sucked into the rotational flow cavity from the gas inlet and the liquid inlet in the step 1, under the action of the kinetic energy of the primary centrifugal impeller, the water flow and the gas flow form high-pressure vortex and turbulence, so that gas-liquid two-phase fluid is rotated, mixed and collided at a high speed, the gas and the liquid are sheared and decomposed, and the gas dissolved in the liquid is released to generate micro bubbles;

and step 3: the micro bubbles in the step 2 are sprayed from the primary nozzle and enter the vortex chamber, when the pressure of the micro bubbles is lower than the saturated vapor pressure in the liquid, the liquid locally generates flash evaporation to generate a plurality of cavities, and the liquid and gas flow is sheared to form ultramicrobubbles;

and 4, step 4: pressurizing the ultramicro bubbles in the step 3 again through a secondary centrifugal impeller, wherein the ultramicro bubbles generate strong hydraulic impulse and increase the flow velocity, and eddy current is generated inside;

and 5: the mixed flow cavity is sprayed at high speed through the secondary nozzle, the flow speed and the pressure of the ultramicro bubbles are reduced rapidly, the liquid is locally cooled and boiled, and the gas dissolved in the ultramicro bubbles is released and generates nano bubbles.

Compared with the prior art, the invention has the outstanding advantages that:

1. the first-stage centrifugal impeller forms high-pressure rotational flow, and the second-stage centrifugal impeller pressurizes again to form high-pressure vortex, so that the gas-liquid two-phase flow has the effect of continuously generating superfine bubbles, namely nano bubbles, the application range and the performance of the nano bubble generating device are effectively improved, and the nano bubble generating device can be used for implementing various gas-liquid fluid process procedures, such as related fields of oxygenation, mixing, disinfection, heating and the like.

2. The invention has high working efficiency and low operation cost.

Description of the drawings:

FIG. 1 is a schematic elevational sectional view of the present invention;

FIG. 2 is a cross-sectional schematic view of the present invention.

In the figure: 1. an outer housing; 2. a drive shaft; 31. a liquid inlet; 31. an air inlet; 4. a swirl chamber; 51. a first-stage centrifugal impeller; 52. a second-stage centrifugal impeller; 61. a primary air guide sleeve; 62. secondary diversion; 71. a primary nozzle; 72. a secondary nozzle; 8. a vortex chamber; 9. a mixing chamber; 10. a mixed gas-liquid outlet; 11. a first-stage fixed baffle; 12. and a secondary fixed baffle.

The specific implementation mode is as follows:

the invention will now be further described by way of specific examples, with reference to FIGS. 1-2:

a nanometer bubble generating device comprises an outer shell 1, wherein an air inlet, a liquid inlet and a mixed gas and liquid outlet 10 are arranged on the outer shell 1, a first-stage fixed baffle 11 and a second-stage fixed baffle 12 are arranged at intervals in the inner cavity of the outer shell 1, the inner cavity of the outer shell 1 is divided into a rotational flow chamber 4, a vortex chamber 8 and a mixed flow chamber 9 by the first-stage fixed baffle 11 and the second-stage fixed baffle 12, the air inlet and the liquid inlet are communicated with the rotational flow chamber 4, the mixed gas and liquid outlet 10 is communicated with the mixed flow chamber 9, a first-stage nozzle 71 is arranged on the first-stage fixed baffle 11, a second-stage nozzle 72 is arranged on the second-stage fixed baffle 12, a first-stage centrifugal impeller accommodating cavity is arranged in the first-stage nozzle 71, a first-stage centrifugal impeller 51 is arranged in the first-stage centrifugal impeller accommodating cavity, a second-stage centrifugal impeller accommodating cavity is arranged in the second-stage nozzle 72, and a second-stage centrifugal impeller 52 is arranged in the second-stage centrifugal impeller accommodating cavity, the first-stage centrifugal impeller 51 and the second-stage centrifugal impeller 52 are mounted on the transmission shaft 2 and rotate along with the transmission shaft 2, and the transmission shaft 2 is driven by a power source to rotate. In this embodiment, the power source is a motor.

As shown in fig. 1, the air inlet and the liquid inlet are one inlet for simultaneously introducing air and liquid, and are respectively a liquid inlet 31 and a gas inlet 32. As another embodiment, the air inlet and the liquid inlet are two inlets, which are respectively an air inlet and a liquid inlet. In this embodiment, the air inlet and the liquid inlet are preferably of a structure in which one inlet simultaneously admits air and feeds liquid.

As shown in fig. 1 and 2, the primary nozzle 71 and the secondary nozzle 72 include a hollow cylindrical body, and more than one circle of radially arranged injection holes are arranged on the body, and the injection holes are venturi tube structures. The injection hole is provided with one or two circles. Each circle of the injection holes is formed by 30-50 micropores. When the injection hole is provided with two circles, there are 60 to 100 micro holes.

A primary air guide sleeve 61 is arranged outside the primary centrifugal impeller 51, the primary air guide sleeve 61 is arranged on the primary fixed baffle 11, a secondary air guide sleeve 62 is arranged outside the secondary centrifugal impeller 52, and the secondary air guide sleeve 62 is arranged on the secondary fixed baffle 12. The outer shell body 1 is of a hollow cylinder structure, and the outer shell body 1, the first-stage centrifugal impeller 51, the first-stage air guide sleeve 61, the second-stage centrifugal impeller 52, the second-stage air guide sleeve 62, the first-stage nozzle 71, the second-stage nozzle 72 and the transmission shaft 2 are coaxially arranged. When the centrifugal impeller works, the first-stage centrifugal impeller 51 and the second-stage centrifugal impeller 52 rotate along with the transmission shaft 2, and the first-stage air guide sleeve 61, the second-stage air guide sleeve 62, the first-stage nozzle 71 and the second-stage nozzle 72 do not rotate.

As shown in fig. 1, one end of the transmission shaft 2 extends out of the outer shell 1, and the other end is rotatably arranged on the primary air guide sleeve 61. A sealing device is arranged between the outer shell 1 and the transmission shaft 2, and the sealing device of the embodiment is preferably a mechanical sealing structure. The sealing structure is arranged, so that the inner cavity of the outer shell 1 can be isolated from the outside, and liquid leakage is prevented.

In addition, the air inlet, the liquid inlet and the mixed gas-liquid outlet 10 are respectively provided with a bypass pipe, the bypass pipe is connected with a liquid storage device, and the generated nano bubbles circulate to the system or are directly discharged to a terminal.

The invention adopts a double-stage combined unit (impeller, air guide sleeve and nozzle) pressurizing (more than 0.3Mpa) and pressurizing (more than 0.3Mpa) mode, and can make the pressure and speed of air flow and water flow reach better working state. Creating the necessary conditions for generating the nano bubbles. The process of the nano bubble generation of the invention is as follows:

when the equipment is started, the power source (the motor 1) drives the transmission shaft 2 to rotate, the first-stage centrifugal impeller 51 and the second-stage centrifugal impeller 52 are driven to rotate at a high speed, the first-stage centrifugal impeller 51 rotates in the cyclone chamber 4 to generate high-speed and high-pressure cyclone in the cyclone chamber 4, a negative pressure area is generated in the center part of the high-speed and high-pressure cyclone, and at the moment, target air flow and liquid flow are sucked into the cyclone chamber 4 from the air inlet and the liquid inlet (in a negative pressure state). Meanwhile, under the action of the kinetic energy of the primary centrifugal impeller 51, high-pressure vortex and turbulent flow are formed by water flow and air flow, so that gas-liquid two-phase fluid is rotated, mixed and collided at high speed, the gas and the liquid are sheared and decomposed, and at the moment, the gas dissolved in the liquid is released to generate micro bubbles. The formed micro-bubbles are sprayed into the vortex chamber 8 from the primary nozzle 71, when the pressure of the micro-bubbles is lower than the saturated vapor pressure in the liquid, the liquid locally flash, a plurality of cavities are generated, and the liquid and the vapor flow are sheared to form the ultra-micro-bubbles. When the ultra-micro bubbles are pressurized again by the secondary centrifugal impeller 52, the ultra-micro bubbles generate strong hydraulic impulse and increase the flow velocity, generate vortex flow inside, and are injected into the mixed flow chamber 9 at high speed through the secondary nozzle 72. At this time, the flow rate and pressure of the microbubbles are rapidly reduced, the liquid is locally cooled and boiled, and the gas dissolved in the microbubbles is released to generate nanobubbles (ultrafine bubbles). The formed nano bubbles are discharged to the system or the terminal through the mixed gas-liquid outlet 10, thereby completing the nano bubble generation process.

The application of the invention is as follows:

aquaculture:

the retention time of the nano bubbles in water is long, and the oxygen transfer efficiency is high (more than 90 percent), so that the nano bubbles are one of the most effective aeration methods at present. Improving culture environment, increasing dissolved oxygen, promoting growth of shrimps, fish and shellfish, and increasing aquaculture yield.

Agriculture/plant cultivation:

the nano bubble water is used for irrigation, so that the growth of crops can be promoted, and the yield can be increased.

The field of water treatment:

the nano bubble water is used for circulating the water body of the swimming pool, so that the sterilization/disinfection can be realized, the consumption of chloride is reduced, and the health of people is benefited.

The nano bubbles are used for decomposing organic pollutants in the sewage and have the functions of sterilization and disinfection. Unlike other disinfectants such as chlorine, the disinfectant has no secondary pollution.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the invention are covered by the protection scope of the invention.