Micro-nano bubble emitting mechanism and application method thereof

Abstract

The application discloses a kind of micro-nano bubble emission mechanism and its application method, including the booster piece being connected with water source in water inlet end, the water outlet end of booster piece is equipped with emission member, setting in the air inlet pipe of emission member;Emission member is equipped with the water flow cavity being connected with the water outlet end of booster piece, one end is connected with the water flow cavity and impacts dispersion cavity, multiple jet orifice is uniformly distributed on the other end of impact dispersion cavity, and flow cone is installed in impact dispersion cavity.The application is mixed by the setting of negative pressure air inlet cavity, gas and liquid are mixed and enter into impact dispersion cavity, and are mechanically cut under the action of flow cone, form fine micro-nano bubble, while liquid and gas in impact dispersion cavity collide violently, so that the diameter of micro-nano bubble is further reduced, to ensure that stable diameter meets the requirements of micro-nano bubble is generated;At the same time, cooperate with the setting of multiple jet orifice, ensure the uniformity of micro-nano bubble distribution when shooting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro-nano bubble, in particular to a micro-nano bubble emitting mechanism and an application method thereof. BACKGROUND

[0002] Micro-nano bubble refers to a micro bubble with a diameter between micron and nanometer. Compared with ordinary bubbles, micro-nano bubbles have the characteristics of small volume, large specific surface area, long existence time, good conduction efficiency, high surface potential, strong biological activity and the ability to generate free radicals. The hydroxyl radicals generated in-situ in the micro-nano bubbles have strong oxidizing properties and can effectively remove various pollutants and pathogenic microorganisms in water bodies.

[0003] The diameter of the micro-nano bubbles generated by the existing micro-nano bubble generator is obtained by relevant measurement methods and measurement equipment. Specifically, the diameter of the micro-nano bubbles generated by the existing micro-nano bubble generator is generally measured by high-speed camera technology, laser diffraction method and conductance method. However, such measurement methods have high equipment cost (high-precision measurement equipment such as high-speed cameras and laser particle size analyzers are required), complex operation (professional technical personnel are required to operate the equipment and process data), high data processing difficulty (a large amount of collected images and signals need to be processed and analyzed), and limited measurement range (it is difficult to measure some extremely small or short-lived bubbles). In actual applications, when the diameter of the micro-nano bubbles needs to be specified, the diameter of the micro-nano bubbles generated by the emitting mechanism needs to be determined in the design stage.

[0004] In addition, in the process of removing pollutants and pathogenic microorganisms in water bodies, the diameter of the generated bubbles needs to be adjusted according to the change of water quality, that is, when the water quality changes greatly, such as the concentration, type and pH value of pollutants, the formation and stability of bubbles and the adsorption effect of pollutants on bubbles may be affected. For example, the increase of the content of surfactants in water makes the bubbles more easily formed and stable, and in this case, the size of the bubbles may need to be appropriately reduced to avoid the bubbles being too large and reducing the adsorption efficiency. Conversely, when the content of surfactants decreases, the air flotation effect may need to be ensured by increasing the aeration amount or adjusting the size of the bubbles. However, the existing micro-nano bubble emitting mechanism cannot accurately control the size of the generated bubbles.

[0005] Therefore, it is necessary to provide a micro-nano bubble generating mechanism that can determine the diameter of the generated micro-nano bubbles without the need for measurement equipment. SUMMARY

[0006] The purpose of the present application is to provide a micro-nano bubble emitting mechanism and an application method thereof, which solves the problem that the micro-nano bubble generator in the background art cannot determine the diameter of the generated micro-nano bubbles.

[0007] In order to achieve the above object, the application provides a micro-nano emitting mechanism, which comprises a booster connected with a water source through a pipeline at an inlet end, a emitting component installed at an outlet end of the booster, and an air inlet pipe arranged on the emitting component.

[0008] Optionally, the emitting component is internally provided with a water flow cavity in communication with the outlet end of the booster at one end, an impact dispersion cavity in communication with the other end of the water flow cavity at one end, a plurality of jet holes uniformly distributed on the other end of the impact dispersion cavity, and a flow guide cone arranged in the impact dispersion cavity; the air inlet pipe is in communication with the water flow cavity.

[0009] Optionally, the bottom of the flow guide cone is directed towards the water flow cavity, and the tip of the flow guide cone is directed towards the jet hole; the water flow cavity comprises a negative pressure air inlet cavity, and the air inlet pipe is in communication with the negative pressure air inlet cavity.

[0010] Optionally, the water flow enters the water flow cavity after being pressurized by the booster, and when moving to the negative pressure air inlet cavity in the water flow cavity, the water flow performs negative pressure suction on the gas to mix the gas with the water flow to form a bubble solution, which is finally impacted on the bottom of the flow guide cone in the impact dispersion cavity and then emitted from the jet hole.

[0011] Optionally, the end of the water flow cavity is provided with a partition, and the partition is provided with a communication hole in communication with the impact dispersion cavity; the water flow cavity comprises a water inlet cavity in communication with the outlet end of the booster at one end and the negative pressure air inlet cavity at the other end, and a gas-liquid mixing cavity in communication with the negative pressure air inlet cavity at one end and the impact dispersion cavity at the other end.

[0012] Optionally, the cross-sectional area of the negative pressure air inlet cavity is smaller than the cross-sectional area of the water inlet cavity and the cross-sectional area of the gas-liquid mixing cavity; the air inlet pipe is provided with a gas flow meter, which is a glass rotor flow meter.

[0013] Optionally, the communication hole is directed towards the central region of the flow guide cone; the water inlet cavity, the gas-liquid mixing cavity and the end of the negative pressure air inlet cavity are provided with a contraction zone, the cross-sectional area of the contraction zone decreases with the distance between the cross-section and the negative pressure air inlet cavity; the diameter of the communication hole is the same as the size of the negative pressure air inlet cavity.

[0014] Optionally, the flow guide cone comprises a cone body, a connecting part arranged on the outer wall of the cone body for connecting the cone body with the cavity wall of the impact dispersion cavity, an impact chamber arranged at the bottom of the cone body, and a plurality of shunt ports arranged at the connecting part at equal angles.

[0015] Optionally, the size of the impact chamber is greater than the diameter of the communication hole, and the end of the impact chamber is arranged in an arc shape.

[0016] The application also discloses an application method of the micro-nano bubble emitting mechanism.

[0017] S1, starting the pressure booster to adjust the pressure and flow rate of the water flow to form a pressurized water flow, and delivering the pressurized water flow into the water flow cavity;

[0018] S2, the pressurized water flow moves in the water flow cavity and forms a negative pressure when passing through the negative pressure air inlet cavity, the gas in the air inlet pipe is sucked to mix the gas and the liquid, and the water body impacts the gas to form a first bubble solution;

[0019] S3, the first bubble solution continues to move along the water flow cavity and impacts the bottom of the flow guide cone after passing through the communication hole to form a second bubble solution;

[0020] S4, the second bubble solution generates a third turbulent shear force when passing through the flow guide cone to form a third bubble solution;

[0021] S5, the third bubble solution moves along the impact dispersion cavity and impacts the end wall of the impact dispersion cavity to form a fourth bubble solution;

[0022] S6, the fourth bubble solution is ejected through the jet hole to form a fifth bubble solution, and the average diameter of the bubbles in the fifth bubble solution is calculated;

[0023] S7, whether the average diameter of the bubbles in the fifth bubble solution generated by the pressure booster meets the required bubble diameter range of the black and odorous water body in the river or wetland for in-situ repair.

[0024] Optionally, in the steps S6 and S7, the calculation formula of the average diameter of the bubbles in the fifth bubble solution is:

[0025] (1);

[0026] In formula (1), is the average diameter of the bubbles in the fifth bubble solution, and the unit is ; is the flow rate of the fourth bubble solution when passing through the jet hole, and the unit is ; is the flow rate of the fourth bubble solution when passing through the jet hole, and the unit is ; is the multiphase flow bubble control coefficient of the fourth bubble solution when passing through the jet hole, and the value is ; is the flow rate attenuation index of the fourth bubble solution when passing through the jet hole, and the value is ; is the flow dilution index of the fourth bubble solution passing through the jet hole, and is valued as ; is the jet synergy index of the fourth bubble solution passing through the jet hole, and is valued as ; is the aperture shear modulation index of the fourth bubble solution passing through the jet hole, and is valued as ; is the number of jet holes; is the diameter of the jet hole, and is valued as ; is the average diameter of the bubbles in the fourth bubble solution, and is valued as .

[0027] Optionally, the calculation formula of the average diameter of the bubbles in the fourth bubble solution is:

[0028] (2);

[0029] In formula (2), is the average diameter of the bubbles in the fourth bubble solution, and is valued as ; is the average diameter of the bubbles in the third bubble solution, and is valued as ; is the refinement coefficient of the third bubble solution impacting the end of the impact dispersion cavity, and the water flow generates impact on the gas to refine the bubbles again.

[0030] Optionally, the calculation formula of the refinement coefficient of the third bubble solution impacting the end of the impact dispersion cavity, and the water flow generating impact on the gas to refine the bubbles again is:

[0031] (3);

[0032] In formula (3), is the refinement coefficient of the third bubble solution impacting the end of the impact dispersion cavity, and the water flow generating impact on the gas to refine the bubbles again; is the bubble refinement comprehensive efficiency coefficient of the third bubble solution, and is valued as ; is the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity; is the length of the impact dispersion cavity, and is valued as ; is the impact force scaling index, and is valued as ; is the impact distance scaling index, and is valued as .

[0033] Optionally, the calculation formula of the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity is:

[0034] (4);

[0035] In formula (4), is the impact force of water on gas when the third bubble solution impacts on the cavity wall of the impact dispersion cavity provided with the jet hole, in units of ; is the change in velocity of the third bubble solution when it impacts on the end cavity wall of the impact dispersion cavity, in units of , equal to ; is the cross-sectional area of the impact dispersion cavity, in units of ; is the flow velocity of the third bubble solution after passing through the flow cone, in units of ; is the density of the liquid in the third bubble solution, in units of .

[0036] Optionally, the calculation formula of the average diameter of the bubbles in the third bubble solution is:

[0037] (5);

[0038] In formula (5), is the average diameter of the bubbles in the third bubble solution, in units of ; is the bubble breakage dynamic coupling coefficient of the third bubble solution, with a value of ; is the fluid dynamic viscosity of the third bubble solution, in units of , with a value of ; is the turbulent breakage scaling exponent of the third bubble solution, with a value of ; is the first turbulent shear force generated by the water pressure in the entire emitting member after passing through the pressure booster, in units of ; is the second turbulent shear force generated by the first bubble solution impacting on the flow cone, in units of ; is the third turbulent shear force generated by the second bubble solution during the process of passing through the flow cone, in units of ; is the average flow velocity of the water flow from the output end of the pressure booster to the entire process of forming the third bubble solution, in units of .

[0039] Optionally, the calculation formula of the flow velocity of the fourth bubble solution when passing through the jet hole is:

[0040] (6);

[0041] In formula (6), is the flow rate of the fourth bubble when passing through the jet hole, and the unit is ; is the cross-sectional area of the jet hole, and the unit is ; is the flow rate of the second bubble solution when passing through the shunt of the flow cone, and the unit is ; is the sum of the cross-sectional areas of all shunts of the flow cone, and the unit is .

[0042] Alternatively, the calculation formula of the flow rate of the second bubble solution when passing through the shunt of the flow cone is:

[0043] (7);

[0044] In formula (7), is the flow rate of the second bubble solution when passing through the shunt of the flow cone, and the unit is ; is the sum of the cross-sectional areas of all shunts of the flow cone, and the unit is ; is the cross-sectional area of the communication hole, and the unit is ; is the flow rate of the first bubble solution when passing through the communication hole, and the unit is .

[0045] Alternatively, the calculation formula of the flow rate of the first bubble solution when passing through the communication hole is:

[0046] (8);

[0047] In formula (8), is the flow rate of the first bubble solution in the communication hole, and the unit is ; is the cross-sectional area of the communication hole, and the unit is ; is the water flow passage area of the negative pressure air inlet cavity, and the unit is ; is the flow rate of the water flow when mixed with the gas in the water flow cavity, and the unit is ;

[0048] Alternatively, the calculation formula of the flow rate of the water flow when mixed with the gas in the water flow cavity is:

[0049] (9);

[0050] In formula (9), is the flow rate of the water stream in the negative pressure intake cavity, and the unit is ; is the flow rate of the water stream after being adjusted by the pressure booster, and the unit is ; is the flow rate of the water stream in the water flow cavity, and the unit is ; is the flow area of the water flow cavity when the water stream flows in the water flow cavity at the flow rate of ;

[0051] Optionally, the calculation formula of the pressure of the water stream when the water stream is mixed with the gas in the water flow cavity is:

[0052] (10);

[0053] In formula (10), is the pressure of the water stream in the negative pressure intake cavity, and the unit is ; is the flow rate of the water stream after being adjusted by the pressure booster; is the flow rate of the water stream in the negative pressure intake cavity, and the unit is ; is the pressure of the water stream after being adjusted by the pressure booster, and the unit is .

[0054] Optionally, the calculation formula of the flow rate of the water stream after being adjusted by the pressure booster is:

[0055] (11);

[0056] In formula (11), is the flow rate of the water stream after being adjusted by the pressure booster, and the unit is ; is the flow rate of the water stream at the water inlet end of the pressure booster, and the unit is , is the pressure at the water inlet end of the pressure booster, and the unit is ; is the density of the liquid entering the pressure booster, and the unit is ; is the pressure of the water stream after being adjusted by the pressure booster, and the unit is .

[0057] Optionally, the calculation formula of the pressure of the water stream after being adjusted by the pressure booster is:

[0058] (12);

[0059] In formula (12), is the pressure of the water stream after being adjusted by the pressure booster, and the unit is ; Pw is the pressure of the water at the inlet of the pressure booster, unit is Pa; ; Pp is the pressure of the water at the outlet of the pressure booster, unit is Pa; .

[0060] Optionally, the calculation formula of the first turbulent shear force generated by the water pressure after the pressure booster impacting the gas in the whole generating device is:

[0061] (13);

[0062] In formula (13), is the first turbulent shear force generated by the water pressure after the pressure booster impacting the gas in the whole generating device, unit is Pa; ; is the conversion efficiency of the kinetic energy of the turbulent vortex generated by the impact of the gas and the water flow in the negative pressure intake cavity to the shear stress, the value is 0.01 to 1; is the minimum distance from the water outlet of the pressure booster to the jet hole, unit is m; ; is the pressure of the water flow in the negative pressure intake cavity, unit is Pa; ; is the ambient pressure of the jet hole, unit is Pa. .

[0063] Optionally, the calculation formula of the second turbulent shear force generated by the first bubble solution impacting the bottom of the flow guide cone is:

[0064] (14);

[0065] In formula (14), is the second turbulent shear force generated by the first bubble solution impacting the impact chamber of the flow guide cone, unit is Pa; ; is the geometric coupling coefficient of the second turbulent shear force; is the density of the liquid, unit is kg / m3; ; is the flow rate of the first bubble solution through the communication hole, unit is m / s; ; is the length of the impact chamber of the flow guide cone, unit is m. .

[0066] Optionally, the calculation formula of the third turbulent shear force generated by the second bubble solution when passing through the flow guide cone is:

[0067] (15);

[0068] In formula (15), is the third turbulent shear force generated by the second bubble solution in the process of passing through the flow guide cone, and the unit is ; is the conical angle of the flow guide cone, and the unit is ; is the geometric coupling coefficient of the second turbulent shear force; is the minimum straight line distance from the tip of the flow guide cone to the outlet end surface of the flow guide cone, and the unit is ; is the fluid dynamic viscosity of the second bubble solution, and the unit is , and the value is ; is the flow velocity of the second bubble solution passing through the flow guide cone, and the unit is .

[0069] The calculation formula of the average flow velocity of the water flow from the output end of the pressure booster to the entire process of forming the third bubble solution is:

[0070] (16);

[0071] In formula (16), is the average flow velocity of the water flow from the output end of the pressure booster to the entire process of forming the third bubble solution, and the unit is ; is the minimum straight line distance from the output end of the pressure booster to the outlet end surface of the flow guide cone, and the unit is ;In formula (16), is divided into 5 sections, , , is divided into sections, the local velocity in the first section, is the length of the section. Compared with the prior art, the micro-nano bubble emitting mechanism and the application method thereof have the following beneficial effects:

[0072] The gas and the liquid are mixed by the setting of the negative pressure air inlet cavity, the gas-liquid mixture is formed and enters the impact dispersion cavity, mechanical cutting is carried out under the action of the flow guide cone, fine micro-nano bubbles are formed, and at the same time, the liquid and the gas in the impact dispersion cavity collide violently, so that the diameter of the micro-nano bubbles is further reduced, thereby ensuring that stable micro-nano bubbles with diameters meeting the requirements are generated.

[0073] The gas and the liquid are mixed by the setting of the negative pressure air inlet cavity, the gas-liquid mixture is formed and enters the impact dispersion cavity, mechanical cutting is carried out under the action of the flow guide cone, fine micro-nano bubbles are formed, and at the same time, the liquid and the gas in the impact dispersion cavity collide violently, so that the diameter of the micro-nano bubbles is further reduced, thereby ensuring that stable micro-nano bubbles with diameters meeting the requirements are generated.

[0074] ​The present application can accurately calculate the size of the micro-nano bubbles generated by the micro-nano bubble emitting mechanism, and can adjust the water body pressure of the pressure increasing part, so as to adjust the finally generated micro-nano bubbles, thereby accurately adjusting the generated bubbles, reducing the trouble of adjusting the bubble size, and improving the efficiency of adjusting the bubble size.

[0075] The present application can accurately calculate the size of the micro-nano bubbles generated by the micro-nano bubble emitting mechanism, and can adjust the water body pressure of the pressure increasing part, so as to adjust the finally generated micro-nano bubbles, thereby accurately adjusting the generated bubbles, reducing the trouble of adjusting the bubble size, and improving the efficiency of adjusting the bubble size. BRIEF DESCRIPTION OF DRAWINGS

[0076] Figure 1 is a schematic diagram of the overall structure of the present application.

[0077] Figure 2 is a schematic diagram of the water flow pressure and flow rate of each position of the present application.

[0078] Figure 3 is a schematic diagram of the structure of the present application.

[0079] Figure 4 is a schematic diagram of the structure of the present application.

[0080] Figure 5 is a graph of the average particle size and concentration of the present application.

[0081] In the figure, 1 is a pressure increasing part, 2 is a bubble emitting part, 21 is a water flow cavity, 211 is a water inlet cavity, 212 is a negative pressure air inlet cavity, 213 is a gas-liquid mixing cavity, 214 is a separation part, 215 is a communication hole, 216 is a contraction area, 22 is an impact dispersion cavity, 23 is a jet hole, 24 is a flow guide cone, 241 is a cone body, 242 is a connecting part, 243 is an impact chamber, 244 is a flow dividing port, 3 is an air inlet pipe, and 31 is a gas flow meter. DETAILED DESCRIPTION

[0082] The following will be described in detail in combination with the drawings and specific implementation. In the following description, many specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0083] The micro-nano bubble emitting mechanism and the application method thereof can be applied to occasions of generating micro-nano bubbles, and can also be applied to other similar application scenarios.

[0084] Referring to the accompanying drawings Figure 1 — Figure 5 As shown in the drawings, a structure schematic diagram of a preferred embodiment of the micro-nano bubble emitting mechanism is shown. The micro-nano bubble emitting mechanism comprises a booster 1 connected with a water source through a pipeline at an inlet end, a launching member 2 is installed at an outlet end of the booster 1, and an air inlet pipe 3 is arranged on the launching member 2.

[0085] Specifically, the launching member 2 is internally provided with a water flow cavity 21 communicated with the outlet end of the booster 1, an impingement and dispersion cavity 22 communicated with the other end of the water flow cavity 21, a plurality of jet holes 23 uniformly distributed on the other end of the impingement and dispersion cavity 22, and a flow guide cone 24 located in the impingement and dispersion cavity 22; the air inlet pipe 3 is communicated with the water flow cavity 21; the cone bottom of the flow guide cone 24 is directed towards the water flow cavity 21, and the cone tip of the flow guide cone 24 is directed towards the jet hole 23; the water flow cavity 21 comprises a negative pressure air inlet cavity 212, and the air inlet pipe 3 is communicated with the negative pressure air inlet cavity 212. It should be particularly noted that the launching member 2 can be integrally processed and formed, and the booster 1 can be a variable frequency booster pump or other booster equipment capable of boosting fluid.

[0086] In the present application, the water flow is boosted by the booster 1, flows out from the outlet end of the booster 1, enters the water flow cavity 21, contacts and mixes with liquid when passing through the negative pressure air inlet cavity 212, forms a gas-liquid mixture and continues to flow along the water flow cavity 21, and then enters the impingement and dispersion cavity 22, where the gas collides with the liquid. When the gas-liquid mixture just enters the impingement and dispersion cavity 22, the gas-liquid mixture contacts the flow guide cone 24 and is mechanically cut, thereby ensuring the stability of bubble generation.

[0087] Referring to the accompanying drawings Figure 1 — Figure 5 As shown in the drawings, the water flow cavity 21 further comprises a water inlet cavity 211 and a gas-liquid mixing cavity 213 located at two ends of the negative pressure air inlet cavity 212 respectively, a contraction area 216 is arranged at the end of the water inlet cavity 211 and the gas-liquid mixing cavity 213 communicated with the negative pressure air inlet cavity 212, and the cross-sectional area of the contraction area 216 decreases with the distance between the cross section and the negative pressure air inlet cavity 212. It should be particularly noted that the cross-sectional area of the negative pressure air inlet cavity 212 is equal at any cross section, and is smaller than the cross-sectional area of the contraction area 216 at any cross section.

[0088] Specifically, the water flow pressurized by the booster 1 first enters the water inlet cavity 211, moves along the water inlet cavity 211, and enters the contraction area 216 in the water inlet cavity 211. Since the cross-sectional area of the contraction area 216 decreases with the distance from the cross-section of the negative pressure air inlet cavity 212, the flow rate of the water flow increases and the pressure decreases. When the water flow enters the negative pressure air inlet cavity 212, the flow rate of the water flow reaches a maximum value and the pressure is minimum. The gas in the air inlet pipe 3 can be sucked into the negative pressure air inlet cavity 212 to mix the gas and the liquid to form a gas-liquid mixture and bubbles. Of course, the air inlet pipe 3 can also be connected to a pressurized gas. When the water flow passes through the negative pressure air inlet cavity 212 and forms a gas-liquid mixture, the gas-liquid mixture enters the contraction area 216 of the gas-liquid mixing cavity 213. However, as the gas-liquid mixture flows, the cross-sectional area gradually increases, causing the flow rate of the water body to gradually decrease, forming a stable gas-liquid mixture. Due to the increase in the cross-sectional area, the pressure of the gas-liquid mixture increases, causing the volume of the bubbles to be compressed, which can increase the internal pressure of the bubbles, thereby increasing the stability of the bubbles and avoiding the phenomenon of premature rupture of the bubbles.

[0089] Referring to the drawings Figure 1 — Figure 5 As shown in the drawings, in the present application, the end of the water flow cavity 21 is provided with a separation part 214, and the communication hole 215 connected with the impact dispersion cavity 22 is arranged on the separation part 214, and the communication hole 215 is directed to the central area of the flow guide cone 24. The flow guide cone 24 includes a cone body 241, a connecting part 242 arranged on the outer wall of the cone body 241 for connecting the cone body 241 with the cavity wall of the impact dispersion cavity 22, an impact chamber 243 arranged at the bottom of the cone body 241, and a plurality of shunt openings 244 arranged at equal angles on the connecting part 242.

[0090] The separation part 214 of the present application is arranged to block the gas-liquid mixture, and ensure that the gas-liquid mixture can only enter the impact dispersion cavity 22 through the communication hole 215. It needs to be particularly pointed out that the separation part 214 and the communication hole 215 are only used to adjust the pressure and flow rate of the gas-liquid mixture, so that when the gas-liquid mixture impacts on the separation part 214, the shear force is small and can be ignored. The communication hole 215 is arranged to guide the gas-liquid mixture in the gas-liquid mixing cavity 213, and the communication hole 215 is directed to the central area of the flow guide cone 24, so as to ensure that the gas-liquid mixture will impact in the impact chamber 243, and ensure that the gas-liquid mixture will generate turbulent flow in the impact chamber 243, so that the gas and the liquid collide, and the communication hole 215 reduces the cross-sectional area of the gas-liquid mixture flow channel, increases the flow rate of the gas-liquid mixture, and improves the turbulent flow effect. It needs to be particularly pointed out that the cross-sectional area of the communication hole 215 is not greater than the cross-sectional area of the gas-liquid mixing cavity 213, the projection area of the impact chamber 243 on the cross section of the communication hole 215 is greater than the projection area of the communication hole 215 on the cross section, and the projection of the communication hole 215 is located in the projection of the impact chamber 243. The connection part 242 is arranged to connect the cone 241 and the cavity wall of the impact dispersion cavity 22, so as to ensure that the cone 241 can be normally installed. The impact chamber 243 is arranged to block the gas-liquid mixture, generate turbulent flow of the gas-liquid mixture, make the gas and the liquid collide, and further split and reduce the micro-nano bubbles. The shunt 244 is arranged to ensure that the fluid after impacting the impact chamber 243 can bypass the flow guide cone 24, can continue to flow in the impact dispersion cavity 22, and finally is sprayed out from the jet hole 23.

[0091] Referring to the drawings Figure 1 Figure 5 As shown in the drawings, the present application also discloses an application method of the diameter of the micro-nano bubbles generated by the micro-nano bubble emitting mechanism, which is applied to the scene that the bubble size needs to be adjusted for in-situ repair of black and smelly water bodies in river channels or wetlands.

[0092] S1, the booster 1 is started to adjust the pressure and flow rate of the water flow to form a pressurized water flow, and the pressurized water flow is delivered into the water flow cavity 21;

[0093] S2, the pressurized water flow moves in the water flow cavity 21 and forms a negative pressure when passing through the negative pressure air inlet cavity 212, so as to suck the gas in the air inlet pipe 3 and mix the gas and the liquid. When the gas and the liquid are mixed, the first bubble solution is formed by the water body impacting the gas;

[0094] S3, the first bubble solution continues to move along the water flow cavity 21 and impacts on the bottom of the flow guide cone 24 after passing through the communication hole 215, so as to form the second bubble solution;

[0095] ​S4, the second bubble solution generates a third turbulent shear force when passing through the flow cone 24, forming a third bubble solution;

[0096] S5, the third bubble solution moves along the impact dispersion chamber 22, collides with the end wall of the impact dispersion chamber 22, and is refined to form a fourth bubble solution;

[0097] S6, the fourth bubble solution is ejected through the jet hole 23 to form a fifth bubble solution, and the average diameter of the bubbles in the fifth bubble solution is calculated;

[0098] S7, determine whether the average diameter of the bubbles in the fifth bubble solution generated by the pressure booster 1 meets the bubble diameter range required for in-situ remediation of black and odorous water bodies in rivers or wetlands.

[0099] In steps S6 and S7, the calculation formula of the average diameter of the bubbles in the fifth bubble solution is:

[0100] (1);

[0101] In formula (1), is the average diameter of the bubbles in the fifth bubble solution, and the unit is ; is the flow rate of the fourth bubble solution when passing through the jet hole 23, and the unit is ; is the flow rate of the fourth bubble solution when passing through the jet hole 23, and the unit is ; is the multiphase flow bubble control coefficient of the fourth bubble solution when passing through the jet hole 23, and the value is ; is the flow rate attenuation index of the fourth bubble solution when passing through the jet hole 23, and the value is ; is the flow dilution index of the fourth bubble solution when passing through the jet hole 23, and the value is ; is the jet synergy index of the fourth bubble solution when passing through the jet hole 23, and the value is ; is the hole diameter shear modulation index of the fourth bubble solution when passing through the jet hole 23, and the value is ; is the number of jet holes 23; is the diameter of the jet hole 23, and the unit is ; is the average diameter of the bubbles in the fourth bubble solution, and the unit is .

[0102] Among them, the calculation formula of the average diameter of the bubbles in the fourth bubble solution is:

[0103] (2);

[0104] In formula (2), D3 is the average diameter of the bubbles in the third bubble solution, in units of ; D2 is the average diameter of the bubbles in the second bubble solution, in units of ; D1 is the refining coefficient of the bubbles in the first bubble solution being refined by the water flow when the first bubble solution impacts the end of the impact dispersion cavity 22.

[0105] The refining coefficient calculation formula of the bubbles in the third bubble solution being refined by the water flow when the third bubble solution impacts the end of the impact dispersion cavity 22 is:

[0106] (3);

[0107] In formula (3), D3 is the average diameter of the bubbles in the third bubble solution, in units of ; D3 is the refining coefficient of the bubbles in the third bubble solution being refined by the water flow when the third bubble solution impacts the end of the impact dispersion cavity 22. ; F3 is the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity 22, in units of ; L3 is the length from the end face of the liquid outlet of the flow dividing port on the flow guide cone to the end of the cavity of the impact dispersion cavity 22, in units of ; F3 is the impact force scaling index, with a value of ; L3 is the impact distance scaling index, with a value of .

[0108] The calculation formula of the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity 22 is:

[0109] (4);

[0110] In formula (4), F3 is the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity 22. ; ΔV3 is the velocity change of the third bubble solution impacting the end wall of the impact dispersion cavity 22, in units of , which is equal to ; A3 is the cross-sectional area of the impact dispersion cavity 22, in units of ; ​V2 is the flow rate of the second bubble solution when passing through the flow guide cone 24, unit is m / s ; ρ3 is the liquid density in the third bubble solution, unit is kg / m3 . It is particularly noted that when the third bubble solution hits the end wall of the impact dispersion chamber 22, the velocity is close to zero, so that can be considered as equal to .

[0111] The calculation formula of the average diameter of the bubbles in the third bubble solution in formula (2) is:

[0112] (5);

[0113] In formula (5), is the average diameter of the bubbles in the third bubble solution, unit is μm ; is the bubble breakage dynamic coupling coefficient in the third bubble solution, taking a value of ; is the fluid dynamic viscosity of the third bubble solution, unit is Pa·s , taking a value of ; is the turbulent breakage scaling exponent of the third bubble solution, taking a value of ; is the first turbulent shear force generated by the water body pressure after the booster 1 impacting the gas in the entire generator 2, unit is N / m2 ; is the second turbulent shear force generated by the first bubble solution hitting the flow guide cone 24, unit is N / m2 ; is the third turbulent shear force generated by the second bubble solution passing through the flow guide cone 24, unit is N / m2 ; is the average flow rate of the water flow from the output end of the booster 1 to the entire process of forming the third bubble solution, unit is m / s .

[0114] The calculation formula of the flow rate of the fourth bubble solution passing through the jet hole 23 in formula (1) is:

[0115] (6);

[0116] In formula (6), is the flow rate of the fourth bubble passing through the jet hole 23, unit is m / s ; is the cross-sectional area of the jet hole 23, unit is m2 ; The velocity of the second bubble solution as it passes through the branch port 244 of the guide cone 24 is expressed in units of... ; The sum of the cross-sectional areas of all the branch outlets 244 of the guide cone 24, in units of .

[0117] The formula for calculating the flow velocity of the second gas bubble solution when passing through the diversion port 244 of the guide cone 24 is:

[0118] (7);

[0119] In equation (7), The velocity of the second bubble solution as it passes through the branch port 244 of the guide cone 24 is expressed in units of... ; The sum of the cross-sectional areas of all the branch outlets 244 of the guide cone 24, in units of ; The cross-sectional area of ​​the connecting hole 215 is given in units of... ; The velocity of the first bubble solution as it passes through the connecting hole 215 is expressed in units of... .

[0120] The formula for calculating the flow velocity of the first bubble solution when passing through the connecting hole 215 is:

[0121] (8);

[0122] In equation (8), The flow rate of the first bubble solution within the connecting hole 215 is expressed in units of... ; The cross-sectional area of ​​the connecting hole 215 is given in units of... ; The water flow area of ​​the negative pressure air intake chamber 212 is in units of ; The velocity of water when it mixes with gas inside the water flow chamber 21 is expressed in units of . .

[0123] The formula for calculating the flow velocity of water when it mixes with gas in the water flow chamber 21 is as follows:

[0124] (9);

[0125] In equation (9), The velocity of water in the negative pressure air inlet chamber 212 is expressed in units of... ; The water flow velocity after being adjusted by the booster unit 1, in units of ; For water flow The flow rate of the water flow in the water flow cavity 21, the water flow passage area of the water flow cavity 21, unit ; The water flow passage area of the negative pressure air inlet cavity 212, unit .

[0126] The calculation formula of the pressure of the water flow mixed with the gas in the water flow cavity 21 is:

[0127] (10);

[0128] In formula (10), The pressure of the water flow in the negative pressure air inlet cavity 212, unit ; The water flow speed after the adjustment of the pressure booster 1; The flow rate of the water flow in the negative pressure air inlet cavity 212, unit ; The water flow pressure after the adjustment of the pressure booster 1, unit .

[0129] The calculation formula of the water flow speed after the adjustment of the pressure booster 1 is:

[0130] (11);

[0131] In formula (11), The water flow speed after the adjustment of the pressure booster 1; The water flow speed at the water inlet end of the pressure booster 1, unit , The pressure at the water inlet end of the pressure booster 1, unit ; The density of the liquid entering the pressure booster 1, unit ; The water flow pressure after the adjustment of the pressure booster 1, unit .

[0132] The calculation formula of the water flow pressure after the adjustment of the pressure booster 1 is:

[0133] (12);

[0134] In formula (12), The water flow pressure after the adjustment of the pressure booster 1, unit ; The pressure at the water inlet end of the pressure booster 1, unit ; The pressure boosting pressure of the pressure booster 1 to the water flow, unit .

[0135] The formula for calculating the first turbulent shear force generated by the water pressure after passing through pressurization component 1 on the gas impact within the entire launch component 2 is:

[0136] (13);

[0137] In equation (13), The first turbulent shear force generated by the water pressure after passing through the pressurization component 1 on the gas impact throughout the entire launch component 2 is expressed in units of... ; The turbulent vortex generated by the collision of gas and water flow in the negative pressure intake chamber 212 has a conversion efficiency of kinetic energy into shear stress ranging from 0.01 to 1. The minimum distance from the outlet of the booster unit 1 to the jet hole 23, in units of ; The pressure of the water flow in the negative pressure air inlet chamber 212 is expressed in units of... ; The ambient pressure at the jet orifice 23 is expressed in units of... .

[0138] The formula for calculating the second turbulent shear force generated by the first bubble impacting the bottom of the guide cone 24 is:

[0139] (14);

[0140] In equation (14), The second turbulent shear force generated by the first gas bubble impacting the solution within the impact chamber 243 of the guide cone 24, is expressed in units of... ; The geometric coupling coefficient of the second turbulent shear force; This is the density of the liquid, in units of... ; The flow rate of the first bubble solution through the connecting hole 215 is expressed in units of... ; The length of the impact chamber 243 of the guide cone 24 is given in units of 243. It should be noted that, since the first bubble solution flows out of the connecting hole 215 and directly impacts the impact chamber 243, it can... It is directly used as the flow velocity within the impact chamber 243 for calculation.

[0141] The third turbulent shear force generated by the second bubble solution as it passes through the guide cone 24, in units of The calculation formula is:

[0142] (15);

[0143] In equation (15), is the third turbulent shear stress of the second bubble solution during the process of passing through the flow guide cone 24, and the unit is ; is the conical angle of the flow guide cone 24, and the unit is ; is the geometric coupling coefficient of the second turbulent shear stress; is the minimum straight line distance from the tip of the flow guide cone 24 to the bottom of the flow guide cone 24, and the unit is ; is the fluid dynamic viscosity of the second bubble solution, and the unit is , and the value is ; is the flow rate of the second bubble solution passing through the flow guide cone 24, and the unit is .

[0144] The calculation formula of the average flow rate of the water flow from the output end of the pressure booster 1 to the entire process of forming the third bubble solution is:

[0145] (16);

[0146] In formula (16), is the average flow rate of the water flow from the output end of the pressure booster 1 to the entire process of forming the third bubble solution, and the unit is ; is the minimum straight line distance from the output end of the pressure booster 1 to the end surface of the flow guide cone 24, and the unit is ; In formula (16), is divided into 5 segments, , , is the local velocity in the first segment after dividing into segments, is the length of the first segment.

[0147] It should be particularly pointed out that in the S2 step, when the gas enters the negative pressure inlet cavity 212 and mixes with the liquid through the negative pressure, a turbulent flow is generated, and in this turbulent flow, the relationship is simplified by local flow approximation, for the gas-liquid mixture, and it is assumed that the fluid is incompressible, steady, and the turbulent effect is mainly reflected in the viscosity, so the turbulent shear stress is represented by the pressure gradient, and the turbulent shear stress is the minimum straight line distance from the water flow into the water flow cavity 21 to the jet hole 23, which satisfies the relationship formula of formula (13). ​​​

[0148] In the S3 step, the bubble refinement effect is set as , The length from the outlet end face of the shunt 244 on the flow guide cone 24 to the end of the impact dispersion chamber 22 cavity; is the third bubble solution bubble refinement comprehensive efficiency coefficient, the value range is 0.5-2, which is determined by the equipment efficiency, fluid properties and energy loss. and is an empirical index, is an impact force scaling index, the value range is 0.5-1.5, reflecting the regulation strength of the impact force of the liquid on the gas on the refinement effect, is an impact distance scaling index, the value range is 1-2, quantifying the impact distance on the energy accumulation effect, which satisfies the relationship formula (3);

[0149] In the S4 step, according to the theoretical model and experimental results of bubble breaking, set is the average diameter of the bubbles in the third bubble solution; is the fluid dynamic viscosity of the third bubble solution; , and is the turbulent shear stress; is the third bubble solution bubble breaking dynamic coupling coefficient, which is used to quantify the synergistic effect of fluid viscosity force and turbulent shear force on bubble breaking, and is 0.5 to 1.5, is the turbulent breaking scaling index of the third bubble solution, which is used to represent the nonlinear scaling relationship between turbulent shear stress and bubble particle size, and is 0.5 to 1, which satisfies the relationship formula (5);

[0150] In the S5 step, based on the local acceleration and deceleration effect of flow, the relationship between the turbulent shear stress and the flow guide cone angle is established by the flow velocity distribution and the viscosity of the fluid. Set is the third turbulent shear force (stress); is the flow rate of the second bubble solution through the shunt 244 of the flow guide cone 24; is the minimum straight line distance from the tip of the flow guide cone 24 to the separation part 214; is the fluid dynamic viscosity of the second bubble solution; is the geometric coupling coefficient of the second turbulent shear force, which is a comprehensive representation of the geometric shape of the flow guide cone 24 and the flow state, and is 0.1 to 10, high (such as >5): suitable for strong interphase coupling (such as high gas holdup, severe mixing), and the turbulent shear force is dominated by interphase momentum exchange; low (such as <1): applicable to weak interphase interaction (such as stratified flow, low gas holdup), shear force is mainly derived from single-phase viscous dissipation, which satisfies the relationship of formula (15);

[0151] In the S7 step, the control of the flow rate of the gas-liquid mixture and the flow rate of the jet hole 23 is crucial for the generation of micro-nano bubbles. Let be the average diameter of the bubble at the outlet of the jet hole 23; be the number of jet holes 23, be the hole diameter of the jet hole; be the multiphase flow bubble regulation coefficient, taking 0.1 to 2, which comprehensively quantifies the system efficiency and fluid characteristics; be the flow rate decay index, taking 0.5 to 1, which regulates the contribution of flow rate to fragmentation; be the flow dilution index, taking 0.3 to 0.5, which quantifies the dilution effect of flow rate on energy density; be the jet synergy index, taking -0.5 to 1.2, which marks the synergy or competition effect of hole number; be the hole diameter shear modulation index, taking -0.3 to 1.2, which marks the nonlinear influence of hole diameter on shear strength, which satisfies the relationship of formula (1).

[0152] The present application mixes gas and liquid by pressure action through the setting of the booster 1 and the negative pressure air inlet cavity 212, and at the same time, the gas and liquid mixture produces turbulent flow to form micro-nano bubbles. Compared with the traditional single gas dissolving and releasing or mechanical cutting method, the present application utilizes the synergistic effect of two forces to ensure that the bubbles can be accurately refined to the micro-nano level while improving the generation efficiency of the bubbles, shortening the micro-nano bubble generation time, and avoiding the problem of high energy consumption caused by relying solely on high pressure or single cutting, thereby reducing the overall energy consumption and improving the energy utilization efficiency of the equipment.

[0153] The present application sets a flow guide cone 24 in the impact dispersion cavity 22, so that the gas-liquid mixture collides in the impact dispersion cavity 22 to produce turbulent flow, and the bubbles move in the gas-liquid mixture, so that the bubbles can be uniformly dispersed in the fluid, avoiding the problem of uneven bubbles when emitting.

[0154] In addition, the setting of the impact dispersion cavity 22 and the jet hole 23 makes the gas and liquid collide, avoids the loss of micro-nano bubble characteristics due to bubble aggregation or dissipation, and improves the stability of the micro-nano bubbles; in the impact dispersion cavity 22, by accurately controlling the size of the impact force of the gas-liquid mixture on the flow guide cone 24, the bubbles are effectively refined and remain stable. At the same time, the uniform distribution design of the jet hole 23 ensures the uniform release of the bubbles in the liquid and reduces the collision or merging between the bubbles, maintaining their stability.

[0155] The application can optimize the structure of the emitting member 2 and the boosting pressure of the boosting member 1 according to the characteristics of different media. Specifically, in a liquid environment with high viscosity, the generation and dispersion efficiency of bubbles can be enhanced by adjusting the impact force of the flow guide cone 24 of the mechanical cutting device; in a liquid with low viscosity or low gas solubility, the pressure and flow rate of the air inlet end of the boosting air inlet pipe 3 can be adjusted to maintain the stability and uniformity of the bubbles. This technology ensures that the application can work effectively in various liquid environments, from drinking water treatment to industrial wastewater treatment, with strong adaptability and versatility.

[0156] Application Example

[0157] The above content of the application will be further described in detail through the application example, but this should not be understood as limiting the scope of the above subject matter of the application to the following examples. Any technology implemented based on the above content of the application belongs to the scope of the application.

[0158] For example, a household water supply pipeline with a diameter of 20 mm is taken as an example, that is, For example, a household water supply pipeline with a diameter of 20 mm is taken as an example, that is, , the water flow rate before the boosting member 1 is , the water pressure is ; the air inlet area of the air inlet pipe 3 is ; the liquid density entering the boosting member 1 is ; the gas density of the air inlet pipe 3 is ; the flow area of the negative pressure air inlet cavity 212 is ; the angle of the flow guide cone 24 is ; the flow area of the communication hole 215 is ; the sum of the cross-sectional areas of all the branch ports 244 of the flow guide cone 24 is .

[0159] When the water pressure after the boosting member 1 is , the pressure cutting effect is good, and the required diameter of the bubbles can be generated, so is taken as an example, that is,

[0160] According to the formula, the calculation of is as follows:

[0161] ​​​​​​​​​​​​​ (11);

[0162] In equation (11), The water flow velocity after being adjusted by the booster unit 1, in units of ; The water flow velocity at the inlet of booster component 1 is expressed in units of... , The pressure at the inlet of booster unit 1 is expressed in units of... ; The density of the liquid entering the pressurization unit 1, in units of ; The water pressure after adjustment by booster 1, in units of ;

[0163] The water flow velocity at the outlet of the booster component 1 was then calculated using the formula. for ;

[0164] According to the formula Calculation:

[0165] (9);

[0166] In equation (9), The velocity of water in the negative pressure air inlet chamber 212 is expressed in units of... ; The water flow velocity after being adjusted by the booster unit 1, in units of ; For water flow When the flow velocity is in the water flow cavity 21, the water flow area of ​​the water flow cavity 21 is, in units of ; The water flow area of ​​the negative pressure air intake chamber 212 is in units of ;

[0167] The flow velocity of water in the negative pressure air inlet chamber 212 is calculated according to the formula. for .

[0168] According to the formula Calculation:

[0169] (10);

[0170] In equation (10), The pressure of water flowing in the negative pressure air inlet chamber 212, in units of ; The water flow speed after adjustment by the booster component 1; The velocity of water in the negative pressure air inlet chamber 212 is expressed in units of... ; The water flow pressure after the adjustment of the pressure booster 1 is ;

[0171] The water flow pressure in the negative pressure intake cavity 212 is calculated according to the formula The water flow pressure in the negative pressure intake cavity 212 is calculated according to the formula ;

[0172] It is particularly noted that the air suction amount of the water flow through the air intake pipe 3 is

[0173] (17)

[0174] In formula (17), The air suction amount of the water flow through the air intake pipe 3 is The air intake area of the air intake pipe 3 is ; The air pressure in the air intake pipe 3 is 1 standard atmosphere is taken here; The water flow pressure in the negative pressure intake cavity 212 is calculated according to the formula ;

[0175] The air suction amount of the water flow through the air intake pipe 3 is calculated according to the formula The air suction amount of the water flow through the air intake pipe 3 is calculated according to the formula Since the air suction amount is too large and the gas cannot be completely dissolved in the water flow, the gas flow is regulated by the gas flow meter 31 to keep the air intake amount at .

[0176] The first turbulent shear force generated by the mutual impact of the gas and the water flow in the negative pressure intake cavity 212 is calculated according to the formula

[0177] (13)

[0178] In formula (13), The first turbulent shear force generated by the impact of the water body pressure after the pressure booster 1 on the gas in the entire generator 2 is ; The conversion efficiency of the kinetic energy of the turbulent vortex generated by the impact of the gas and the water flow in the negative pressure intake cavity 212 to the shear stress is 0.01 to 1; The minimum distance from the water outlet of the pressure booster 1 to the jet hole 23 is ; The water flow pressure in the negative pressure intake cavity 212 is ; The ambient pressure of the jet hole 23 is ;

[0179] The first turbulent shear force generated by the collision of the gas and water flow in the negative pressure air intake cavity 212 is calculated according to the formula The first turbulent shear force generated by the collision of the gas and water flow in the negative pressure air intake cavity 212 is calculated according to the formula .

[0180] The flow rate of the first bubble solution through the communication hole 215 is calculated according to the formula:

[0181] (8);

[0182] In formula (8), is the flow rate of the first bubble solution in the communication hole 215, and the unit is ; is the cross-sectional area of the communication hole 215, and the unit is ; is the water flow passage area of the negative pressure air intake cavity 212, and the unit is ; is the flow rate of the water flow mixed with the gas in the water flow cavity 21, and the unit is .

[0183] The second turbulent shear force generated by the collision of the first bubble solution on the flow guide cone 24 is calculated according to the formula:

[0184] (14);

[0185] In formula (14), is the second turbulent shear force generated by the collision of the first bubble solution in the impact chamber 243 of the flow guide cone 24, and the unit is ; is the geometric coupling coefficient of the second turbulent shear force; is the liquid density, and the unit is ; is the flow rate of the first bubble solution through the communication hole 215, and the unit is ; is the length of the impact chamber 243 of the flow guide cone 24, and the unit is .

[0186] The second turbulent shear force generated by the collision of the first bubble solution on the flow guide cone 24 is calculated according to the formula is .

[0187] The flow rate of the second bubble solution when passing through the flow guide cone 24 is calculated according to the formula:

[0188] (7);

[0189] In formula (7), is the flow rate of the second bubble solution when passing through the flow dividing port 244 of the flow cone 24, unit is ; is the sum of the cross-sectional areas of all flow dividing ports 244 of the flow cone 24, unit is ; is the cross-sectional area of the communication hole 215, unit is ; is the flow rate of the first bubble solution when passing through the communication hole 215, unit is .

[0190] According to the formula, the flow rate of the second bubble solution when passing through the flow dividing port 244 of the flow cone 24 is calculated as is .

[0191] According to the formula, the third turbulent shear force generated by the second bubble solution when passing through the flow cone 24 and being impacted by the rear first bubble solution again hitting the flow cone 24 is calculated as:

[0192] (15);

[0193] In formula (15), is the third turbulent shear force generated by the second bubble solution when passing through the flow cone 24, unit is ; is the conical angle of the flow cone 24, unit is ; is the geometric coupling coefficient of the second turbulent shear force; is the minimum straight line distance from the tip of the flow cone 24 to the bottom of the flow cone 24, unit is ; is the fluid dynamic viscosity of the second bubble solution, unit is , the value is ; is the flow rate of the second bubble solution passing through the flow dividing port 244 of the flow cone 24, unit is .

[0194] According to the formula, the third turbulent shear force generated by the second bubble solution when passing through the flow cone 24 is calculated as is .

[0195] According to the formula, the average flow rate of the water flow from the output end of the pressure booster 1 to the entire process of forming the third bubble solution is calculated as:

[0196] (16);

[0197] In formula (16), is the average flow velocity of water flow from the output end of the pressure booster 1 to the formation of the third bubble solution, unit is ; is the minimum straight line distance from the output end of the pressure booster 1 to the end surface of the flow guide cone 24, unit is ; In the middle, is divided into 5 sections, , , is divided into sections , section, the local velocity of the first , section, is the length of the first , section.

[0198] According to the formula, the average flow velocity of water flow from the output end of the pressure booster 1 to the formation of the third bubble solution is calculated as is .

[0199] According to the formula, the average diameter of the bubbles in the second bubble solution is calculated as

[0200] (5);

[0201] In formula (5), is the average diameter of the bubbles in the third bubble solution, unit is ; is the dynamic coupling coefficient of bubble breakage in the third bubble solution, which is ; is the fluid dynamic viscosity of the third bubble solution, unit is , which is ; is the turbulent breakage scaling exponent of the third bubble solution, which is ; is the first turbulent shear force generated by the pressure of the water body after the pressure booster 1 impacting the gas in the entire generator 2, unit is ; is the second turbulent shear force generated by the first bubble solution impacting on the flow guide cone 24, unit is ; is the third turbulent shear force generated by the second bubble solution during the process of passing through the flow guide cone 24, unit is ; is the average flow velocity of water flow from the output end of the pressure booster 1 to the formation of the third bubble solution, unit is .

[0202] The average diameter of the bubbles in the second bubble solution is calculated according to the formula = 0.5 x D2 .

[0203] The impact force of the water body on the gas when the third bubble solution impacts the cavity wall of the impact dispersion cavity 22 provided with the jet hole 23 is calculated according to the formula

[0204] (4);

[0205] In formula (4), is the impact force of the water body on the gas when the third bubble solution impacts the cavity wall of the impact dispersion cavity 22 provided with the jet hole 23; is the change amount of the velocity of the third bubble solution impacting the end cavity wall of the impact dispersion cavity 22, and the unit is m / s; , which is equal to ; is the cross-sectional area of the impact dispersion cavity 22, and the unit is m2; ; is the flow rate of the second bubble solution when passing through the flow dividing port 244 of the flow guide cone 24, and the unit is m / s; ; is the liquid density in the third bubble solution, and the unit is kg / m3.

[0206] The impact force of the third bubble solution in the impact dispersion cavity 22 is calculated according to the formula = 0.5 x D3 .

[0207] The calculation of the effect of the water flow on the gas to further refine the bubbles when the third bubble solution impacts the end of the impact dispersion cavity 22 is performed according to the formula

[0208] (3);

[0209] In formula (3), is the refinement coefficient of the water flow on the gas to further refine the bubbles when the third bubble solution impacts the end of the impact dispersion cavity 22; is the comprehensive efficiency coefficient of the bubble refinement in the third bubble solution, and the value is ; is the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity 22, and the unit is N; ; is the length from the liquid outlet end face of the flow dividing port 244 on the flow guide cone 24 to the end of the cavity body of the impact dispersion cavity 22, and the unit is m; ; is the impact force scaling index, and the value is ; ​For the impact distance scaling index, the value is .

[0210] The bubble refining effect of water flow and gas in the third bubble solution in the impact dispersion chamber 22 is calculated according to the formula 5.07.

[0211] The calculation of the average diameter of the bubbles in the third bubble solution is carried out according to the formula:

[0212] (2);

[0213] In formula (2), is the average diameter of the bubbles in the fourth bubble solution, with the unit of ; is the average diameter of the bubbles in the third bubble solution, with the unit of ; is the refining coefficient of the third bubble solution impacting the end of the impact dispersion chamber 22, and the water flow impacting the gas makes the bubbles refined again.

[0214] The calculation of the average diameter of the bubbles in the fourth bubble solution is carried out according to the formula:

[0215] (1);

[0216] In formula (1), is the average diameter of the bubbles in the fifth bubble solution, with the unit of ; is the flow rate of the fourth bubble solution passing through the jet hole 23, with the unit of ; is the flow of the fourth bubble solution passing through the jet hole 23, with the unit of ; is the multiphase flow bubble control coefficient of the fourth bubble solution passing through the jet hole 23, with the value of ; is the flow rate decay index of the fourth bubble solution passing through the jet hole 23, with the value of ; is the flow dilution index of the fourth bubble solution passing through the jet hole 23, with the value of ; is the jet synergy index of the fourth bubble solution passing through the jet hole 23, with the value of ; is the hole diameter shear modulation index of the fourth bubble solution passing through the jet hole 23, with the value of ; is the number of jet holes 23; is the diameter of the jet hole 23, with the unit of ; D4 is the average diameter of the bubbles in the fourth bubble solution, in microns .

[0217] D4 is the average diameter of the bubbles in the fourth bubble solution, in microns D4 is the average diameter of the bubbles in the fourth bubble solution, in microns .

[0218] D4 is the average diameter of the bubbles in the fourth bubble solution, in microns D4 is the average diameter of the bubbles in the fourth bubble solution, in microns

[0219] The above examples are illustrative of the present application and are not limiting. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein.

Claims

1. A micro-nano bubble emitting mechanism, comprising a booster (1) connected with a water source through a pipeline at an inlet end, characterized in that, The pressurizing component (1) is equipped with a launcher (2) at the water outlet end, and an air inlet pipe (3) is provided on the launcher (2). The launching component (2) is provided with a water flow cavity (21) with one end connected to the water outlet of the pressurizing component (1), an impact dispersion cavity (22) with one end connected to the other end of the water flow cavity (21), multiple jet holes (23) evenly distributed on the other end of the impact dispersion cavity (22), and a guide cone (24) located in the impact dispersion cavity (22). The air inlet pipe (3) is connected to the water flow chamber (21); The bottom of the guide cone (24) faces the water flow cavity (21), and the tip of the guide cone (24) faces the jet hole (23). The water flow chamber (21) includes a negative pressure air intake chamber (212), and the air intake pipe (3) is connected to the negative pressure air intake chamber (212); After being pressurized by the pressurizing component (1), the water enters the water flow chamber (21). When it moves to the negative pressure air inlet chamber (212) in the water flow chamber (21), the gas is drawn in by negative pressure, so that the gas mixes with the water flow to form a bubble solution. The solution then impacts the bottom of the guide cone (24) in the impact dispersion chamber (22) and is finally ejected from the jet hole (23). The water flow cavity (21) is provided with a partition (214) at its end, and the partition (214) is provided with a connecting hole (215) that communicates with the impact dispersion cavity (22). The connecting hole (215) faces the central region of the guide cone (24); A contraction zone (216) is provided at one end of the water inlet chamber (211), the gas-liquid mixing chamber (213) and the negative pressure air inlet chamber (212). The cross-sectional area of ​​the contraction zone (216) decreases as the distance between the cross-section and the negative pressure air inlet chamber (212) decreases. The guide cone (24) includes a cone (241), a connecting part (242) provided on the outer wall of the cone (241) for connecting the cone (241) to the wall of the impact dispersion chamber (22), an impact chamber (243) provided at the bottom of the cone (241), and multiple diversion ports (244) provided at equal angles on the connecting part (242). The impact chamber (243) is larger than the diameter of the connecting hole (215), and the end of the impact chamber (243) is arc-shaped.

2. The micro / nano bubble emission mechanism according to claim 1, characterized in that, The water flow chamber (21) includes a water inlet chamber (211) with one end connected to the water outlet of the pressurizing component (1) and the other end connected to the negative pressure air inlet chamber, and a gas-liquid mixing chamber (213) with one end connected to the negative pressure air inlet chamber (212) and the other end connected to the impact dispersion chamber (22). The cross-sectional area of ​​the negative pressure air inlet chamber (212) is smaller than that of the water inlet chamber (211) and also smaller than that of the gas-liquid mixing chamber (213). A gas flow meter (31) is installed on the air inlet pipe (3).

3. The method of using the micro-nano bubble emitting device according to claim 1 or 2, which is applied to the scene of in-situ remediation of black and odorous water body in river or wetland, wherein the size of the bubbles needs to be adjusted, characterized in that, include: S1. Start the pressurizing component (1) to adjust the pressure and flow rate of the water flow to form a pressurized water flow, and deliver the pressurized water flow into the water flow chamber (21); S2, the negative pressure is formed when the pressurized water flow moves through the negative pressure intake cavity (212) in the water flow cavity (21), the gas in the air intake pipe (3) is sucked, and the gas and the liquid are mixed; when the gas and the liquid are mixed, the gas is impacted by the water body, and a first bubble solution is formed; S3, the first bubble solution continues to move along the water flow cavity (21) and impacts the bottom of the flow guide cone (24) to generate a second shear force, and a second bubble solution is formed; S4, the second bubble solution passes through the flow guide cone (24) to generate a third turbulent shear force, and a third bubble solution is formed; S5, the third bubble solution moves along the impact dispersion cavity (22) and impacts the end wall of the impact dispersion cavity (22), and a fourth bubble solution is formed; S6, the fourth bubble solution is ejected through the jet hole (23) to form a fifth bubble solution, and the average diameter of the bubbles in the fifth bubble solution is calculated; S7, whether the average diameter of the bubbles in the fifth bubble solution generated by the pressurizing part (1) meets the bubble diameter range required for in-situ repair of black and odorous water bodies in rivers or wetlands.

4. The use according to claim 3, characterized in that, In steps S6 and S7, the calculation formula of the average diameter of the bubbles in the fifth bubble solution is: （1）； In formula (1), is the average diameter of the bubbles in the fifth bubble solution, in units of ; is the flow rate of the fourth bubble solution when passing through the jet orifice (23), in units of ; is the flow rate of the fourth bubble solution when passing through the jet orifice (23), in units of ; is the multiphase flow bubble regulation coefficient of the fourth bubble solution when passing through the jet orifice (23), with a value of ; is the flow rate decay index of the fourth bubble solution when passing through the jet orifice (23), with a value of ; is the flow rate dilution index of the fourth bubble solution when passing through the jet orifice (23), with a value of ; is the jet synergy index of the fourth bubble solution when passing through the jet orifice (23), with a value of ; is the orifice diameter shear modulation index of the fourth bubble solution when passing through the jet orifice (23), with a value of ; is the number of jet orifices (23); is the diameter of the jet orifice (23), in units of ; is the average diameter of the bubbles in the fourth bubble solution, in units of .

5. The method of claim 4, wherein the compound is administered in an amount of about 0.1 to 10 mg / kg. The calculation formula of the average diameter of the bubbles in the fourth bubble solution is: （2）； In formula (2), D4 is the average diameter of the bubbles in the fourth bubble solution, in units of ; D3 is the average diameter of the bubbles in the third bubble solution, in units of ; D3 is the average diameter of the bubbles in the third bubble solution, in units of ; The calculation formula of the refinement coefficient of the bubbles when the third bubble solution impacts the end of the impact dispersion cavity (22) is: （3）； In formula (3), is the refining coefficient of the third bubble solution, which is the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity (22), and the unit is ; ; is the refining coefficient of the third bubble solution, which is the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity (22), and the unit is ; is the length from the end face of the liquid outlet of the flow dividing port (244) on the flow guide cone (24) to the end of the cavity of the impact dispersion cavity (22), and the unit is ; is the impact force scaling index, and the value is ; is the impact distance scaling index, and the value is ; The calculation formula of the impact force of the water flow on the gas when the third bubble solution impacts the end of the impact dispersion cavity (22) is: （4）； In formula (4), is the impact force of the water body on the gas when the third bubble solution impacts the cavity wall of the impact dispersion cavity (22) provided with the jet hole (23); is the speed variation of the third bubble solution when it impacts the end cavity wall of the impact dispersion cavity (22), and the unit is ; ; is the cross-sectional area of the impact dispersion cavity (22), and the unit is ; is the flow rate of the second bubble solution when passing through the shunt port (244) of the flow guide cone (24), and the unit is ; is the liquid density in the third bubble solution, and the unit is .

6. The use according to claim 5, characterized in that, The calculation formula of the average diameter of the bubbles in the third bubble solution is: （5）； In formula (5), is the average diameter of the bubbles in the third bubble solution, with units of ; is the bubble breakage dynamic coupling coefficient of the third bubble solution, with a value of ; is the fluid dynamic viscosity of the third bubble solution, with units of , and a value of ; is the turbulent breakage scaling exponent of the third bubble solution, with a value of ; is the first turbulent shear force generated by the water body pressure after the pressure booster (1) impacting the gas in the entire generator (2), with units of ; is the second turbulent shear force generated by the first bubble solution impacting the flow cone (24), with units of ; is the third turbulent shear force generated by the second bubble solution during the process of passing through the flow cone (24), with units of ; is the average flow velocity of the water flow from the output end of the pressure booster (1) to the entire process of forming the third bubble solution, with units of ; The calculation formula of the flow rate of the fourth bubble solution when passing through the jet hole (23) is: （6）； In formula (6), is the flow rate of the fourth bubble when passing through the jet hole (23), and the unit is ; is the cross-sectional area of the jet hole (23), and the unit is ; is the flow rate of the second bubble solution when passing through the flow dividing port (244) of the flow cone (24), and the unit is ; is the sum of the cross-sectional areas of all flow dividing ports (244) of the flow cone (24), and the unit is ; The calculation formula of the flow rate of the second bubble solution when passing through the flow guide cone (24) is: （7）； In formula (7), is the flow rate of the second bubble solution when passing through the flow guide cone (24) split port (244), units of ; is the sum of the cross-sectional area of all split ports (244) of the flow guide cone (24), units of ; is the cross-sectional area of the communication hole (215), units of ; is the flow rate of the first bubble solution when passing through the communication hole (215), units of ; The calculation formula of the flow rate of the first bubble solution when passing through the communication hole (215) is: （8）； In formula (8), is the flow rate of the first bubble solution in the communication hole (215), and the unit is ; is the cross-sectional area of the communication hole (215), and the unit is ; is the water flow passage area of the negative pressure air inlet cavity (212), and the unit is ; is the flow rate of the water flow mixed with the gas in the water flow cavity (21), and the unit is ; The calculation formula of the flow rate of the water flow when mixing with the gas in the water flow cavity (21) is: （9）； In formula (9), is the flow rate of the water flow in the negative pressure air inlet cavity (212), and the unit is ; is the flow rate of the water flow after being adjusted by the pressure booster (1), and the unit is ; is the flow rate of the water flow in the water flow cavity (21), and the unit is ; is the water flow passage area of the water flow cavity (21) when the water flow flows at the flow rate, and the unit is ; is the water flow passage area of the negative pressure air inlet cavity (212), and the unit is The calculation formula of the pressure of the water flow when mixing with the gas in the water flow cavity (21) is: （10）； In formula (10), P is the pressure of the water flow when entering the negative pressure intake cavity (212), unit is ; The water flow speed after being adjusted by the pressure booster (1); V is the flow rate of the water flow when entering the negative pressure intake cavity (212), unit is ; P1 is the pressure of the water flow after being adjusted by the pressure booster (1), unit is ; The calculation formula of the water flow speed after being adjusted by the pressurizing part (1) is: （11）； In formula (11), is the water flow rate after adjustment by the booster (1) in units of ; is the water flow rate at the inlet of the booster (1) in units of , is the pressure at the inlet of the booster (1) in units of ; is the density of the liquid entering the booster (1) in units of ; is the water flow pressure after adjustment by the booster (1) in units of ; The calculation formula of the water flow pressure after being adjusted by the pressurizing part (1) is: （12）； In formula (12), Pw is the water flow pressure regulated by the pressure booster (1), unit is MPa ; Pwi is the pressure at the water inlet end of the pressure booster (1), unit is MPa ; Pw is the water flow pressure regulated by the pressure booster (1), unit is MPa .

7. The method of use of claim 6, wherein, The calculation formula of the first turbulent shear force generated by the water body pressure after the pressurizing part (1) impacting the gas in the entire emitting part (2) is: （13）； In formula (13), is the first turbulent shear force generated by the water pressure after the booster (1) impacting the gas in the entire generator (2), with units of ; is the conversion efficiency of the kinetic energy of the turbulent vortex generated by the impact of the gas and water flow in the negative pressure intake chamber (212) to shear stress, with a value of 0.01 to 1; is the minimum distance from the water outlet end of the booster (1) to the jet hole (23), with units of ; is the pressure of the water flow in the negative pressure intake chamber (212), with units of ; is the ambient pressure at which the jet hole (23) is located, with units of ; The calculation formula of the second turbulent shear force generated by the first bubble solution impacting the bottom of the flow guide cone (24) is: （14）； In formula (14), is the second turbulent shear force generated by the first bubble solution impacting in the impact chamber (243) of the flow cone (24), with units of ; is the geometric coupling coefficient of the second turbulent shear force; is the liquid density, with units of ; is the flow rate of the first bubble solution through the communication hole (215), with units of ; is the length of the impact chamber (243) of the flow cone (24), with units of ; The calculation formula of the third turbulent shear force generated by the second bubble solution passing through the flow guide cone (24) is: （15）； In formula (15), is the third turbulent shear force generated by the second bubble solution when passing through the flow cone (24), and the unit is ; is the conical angle of the flow cone (24), and the unit is ; is the geometric coupling coefficient of the second turbulent shear force; is the minimum straight line distance from the tip of the flow cone (24) to the bottom of the flow cone (24), and the unit is ; is the fluid dynamic viscosity of the second bubble solution, and the unit is , the value is ; is the flow rate of the second bubble solution passing through the flow cone (24) of the flow cone (24), and the unit is ; The calculation formula of the average flow rate of the water flow from the output end of the pressurizing part (1) to the entire process of forming the third bubble solution is: （16）； In equation (16), The average flow velocity of water from the output end of the booster (1) to the formation of the third bubble solution is expressed in units of 1. ; The minimum straight-line distance from the output end of the booster (1) to the outlet end face of the diversion port (244) of the guide cone (24), in units of ; middle, To be Divided into 5 sections, , To be Divided into ( After paragraph ) in the first ( Local velocity of segment ) For this ( ( ) The length of the segment.

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