Efficient micro-nano bubble generator

Abstract

The utility model discloses an efficient micro-nano bubble generator which comprises a shell and a generation column installed in the shell, the shell is provided with a gas-liquid inlet and a gas-liquid outlet, a gas-liquid mixture entering from the gas-liquid inlet flows through the generation column and then flows out from the gas-liquid outlet, the generation column comprises a plurality of bubble cutting units, flow channels are formed in the surfaces of the bubble cutting units, and the flow channels are communicated with the gas-liquid mixture. And pressure reduction grooves are formed among the bubble cutting units. According to the efficient micro-nano bubble generator, high-concentration micro-nano bubbles can be generated, the mass transfer effect is good, the generated micro-nano bubbles can be used in occasions with the high pressure being 10 Mpa or above, and the particle size and proportion of the bubbles can be controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bubble generator especially relates to a high -efficient micro -nano bubble generator. BACKGROUND

[0002] Micro -nano size bubble because have big specific surface area, long in liquid stay time, self -boosting dissolution, surface adsorption capacity is strong and easy to produce strong oxidant hydroxyl radical etc.

[0003] Gas -liquid -solid three -phase reaction is the common reaction in chemical industry, many kinds, most cases solid is catalyst, gas and liquid are reactants and products. Commonly used for gas -liquid -solid three -phase reaction loop reactor is by reaction kettle, heat exchanger, venturi ejector, loop circulating pump and circulating pipeline is composed, loop reactor when working, by circulating pump reaction liquid is sent into venturi ejector, forms fast jet stream through nozzle, gas chamber gas is ejected, liquid impact to the pipe wall after fully mixed and reacts, in this area, intense turbulence makes gas -liquid complete the initial main mass transfer function, and then gas -liquid two -phase mixture is ejected into the reaction kettle. Because the bubble produced by venturi ejector is big, mass transfer effect is not good and influences the conversion rate of reaction. Micro -nano bubble compared with macro bubble, has big specific surface area, high activity, mass transfer rate is fast, long retention time etc., can promote gas -liquid two -phase or gas -liquid -solid three -phase dispersion uniform, high -efficient reaction.

[0004] At present, most of the micro -nano bubble generators on the market are used in normal pressure occasions and cannot be applied to high pressure occasions of many chemical reactions or have poor use effect, the bubble particle size and proportion control are not good, and the bubble particle size and proportion cannot be controlled according to the reaction requirements. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies and defects in the prior art, the utility model provides a kind of high -efficient micro -nano bubble generator, it can produce high concentration micro -nano bubble, and its mass transfer effect is good, the micro -nano bubble generated in the application can be used in high pressure 10Mpa above occasion, and bubble particle size and proportion can be controlled.

[0006] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0007] A kind of high -efficient micro -nano bubble generator, including shell and generating column installed in shell, the shell has gas-liquid inlet and gas-liquid outlet, gas-liquid mixture from gas-liquid inlet flows through generating column and then flows out from gas-liquid outlet, the generating column includes multiple bubble cutting units, flow channel is equipped on the surface of bubble cutting unit, and pressure reduction groove is arranged between bubble cutting units.

[0008] As preferred, the flow channel is a spiral flow channel.

[0009] As preferred, the inflow end of the bubble cutting unit is provided with a jagged surface.

[0010] As preferred, the front end of the bubble cutting unit at the gas-liquid inlet end is provided with a collision platform.

[0011] As preferred, the collision platform is a multi-stage circular platform, and the collision platform, the bubble cutting unit and the gas-liquid inlet are coaxially arranged.

[0012] As preferred, the shell comprises an outer shell and an inner shell, the generation column is arranged in the inner shell cavity, the gas-liquid inlet and the gas-liquid outlet are respectively arranged at two ends of the inner shell, a gas chamber is arranged in the outer shell cavity, the gas inlet of the gas chamber is arranged on the outer shell, and the gas outlet of the gas chamber is in communication with the inner shell cavity.

[0013] As preferred, the gas inlet of the gas chamber is located at the upper part of the outer shell, and the gas outlet of the gas chamber is located at the gas-liquid outlet.

[0014] As preferred, the gas-liquid inlet comprises a gradually reduced volume horn mouth section and a cylindrical section, and the diameter of the generation column is greater than the diameter of the cylindrical section and smaller than the maximum diameter of the horn mouth section.

[0015] As preferred, the gas-liquid outlet is a gradually expanded volume horn mouth, the end of the generation column has a circular conical platform section with a gradually increased diameter, and the diameter of the circular conical platform section is smaller than the diameter of the bubble cutting unit.

[0016] As preferred, the number of bubble cutting units is not less than 3.

[0017] The beneficial effects of the utility model are as follows: (1) the generation column has multiple bubble cutting units, the bubbles in the liquid are cut multiple times to generate a large number of small bubbles; (2) the spiral flow channel on the bubble cutting unit makes the gas-liquid two-phase fluid produce rotary motion, so that the gas and the liquid are continuously sheared, stirred and dispersed in the flow channel, and the uniformity of gas-liquid mixing can be significantly improved; (3) the jagged surface on the bubble cutting unit increases the impact and convection, which is beneficial to bubble cutting; (4) the pressure reduction grooves between the bubble cutting units can gradually reduce the pressure, release the dissolved gas in the liquid, and generate micro-nano bubbles. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1It is a structural schematic view of the utility model.

[0020] Figure 2 It is Figure 1 The local enlarged view at A in the middle.

[0021] Figure 3 It is a column structure schematic view.

[0022] Figure 4 It is a shell structure schematic view.

[0023] Figure 5 It is a different bubble mass transfer effect comparison chart.

[0024] In the drawing: 1 column, 11 bubble cutting unit, 12 flow channel, 13 sawtooth surface, 14 pressure reduction groove, 15 impact platform, 16 conical platform section, 2 shell, 21 outer shell, 22 inner shell, 23 gas-liquid inlet, 231 horn mouth section, 232 cylindrical section, 24 gas-liquid outlet, 3 gas chamber, 31 gas inlet, 32 gas outlet. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, if the terms "set", "install", "connect", "connect" appear, it should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The utility model discloses a kind of high-efficiency micro-nano bubble generators, such as Figure 1As shown, including shell 2 and installed in the shell 2, the shell 2 has gas-liquid inlet 23 and gas-liquid outlet 24, the gas-liquid mixture from the gas-liquid inlet 23 into the flow through the column 1 from the gas-liquid outlet 24, the column 1 includes a plurality of bubble cutting unit 11, bubble cutting unit 11 surface is provided with flow channel 12, bubble cutting unit 11 between the pressure reduction groove 14.Gas-liquid mixture under the action of bubble cutting unit 11 shear, stirring and dispersion, into the annular pressure reduction groove 14, because the pressure reduction groove 14 contains fluid through the cavity cross-sectional area increases, thereby reducing the pressure, release of dissolved gas in the liquid, constantly produce micro-nano bubbles.

[0028] In this embodiment, the flow channel 12 adopts spiral flow channel 12, when the fluid flows through the spiral flow channel 12, the spiral structure will make the gas-liquid two-phase flow produce rotary motion, the gas and liquid are constantly sheared, stirred and dispersed in the flow channel 12.Compared with the straight channel, the spiral flow channel can significantly improve the uniformity of gas-liquid mixing.

[0029] As a further improvement of the utility model, the inflow end of the bubble cutting unit 11 is provided with a sawtooth surface 13, referring to Figure 1 And Figure 2 The sawtooth surface can increase the impact and convection effect.

[0030] As a further improvement of the utility model, the front end of the bubble cutting unit 11 at the gas-liquid inlet 23 end is provided with a collision platform 15.The collision platform 15 is a multi-stage circular platform, and the collision platform 15, the bubble cutting unit 11 and the gas-liquid inlet 23 are coaxially arranged.The collision platform 15 collides with the fluid entering from the gas-liquid inlet 23 to produce convection, enhancing the gas-liquid mixing effect; under the action of the impact force, the bubbles will be split into smaller bubbles.

[0031] Referring to Figure 1 And Figure 4 , the shell 2 includes an outer shell 21 and an inner shell 22, the column 1 is arranged in the cavity of the inner shell 22, the gas-liquid inlet 23 and the gas-liquid outlet 24 are arranged at the two ends of the inner shell 22 respectively, the gas chamber 3 is arranged in the cavity of the outer shell 21, the gas inlet 31 of the gas chamber 3 is arranged on the outer shell 21, and the gas outlet 32 of the gas chamber 3 is in communication with the cavity of the inner shell 22.The gas inlet 31 of the gas chamber 3 is located in the upper part of the outer shell 21, and the gas outlet 32 of the gas chamber 3 is located at the gas-liquid outlet 24.The gas outlet 32 is arranged at the gas-liquid outlet 24, under the action of high-speed gas-liquid mixed fluid, more gas-phase medium is brought in.Application to chemical reaction, the gas-phase medium discharged from the reaction kettle or other reactors can be introduced into the reaction system again through the gas chamber 3, which can improve the reaction conversion rate.

[0032] The gas-liquid inlet 23 comprises a gradually reduced volume horn section 231 and a cylindrical section 232, and the diameter of the generation column 1 is greater than the diameter of the cylindrical section 232 and less than the maximum diameter of the horn section 231. The structure of the gradually reduced volume horn section 231 and the cylindrical section 232 improves the fluid entering flow rate and enhances the impact effect.

[0033] The gas-liquid outlet 24 is a gradually expanded volume horn, and the end of the generation column 1 has a conical frustum section 16 with a gradually increasing diameter, and the diameter of the conical frustum section 16 is less than the diameter of the bubble cutting unit 11. A channel is formed between the conical frustum section 16 and the gas-liquid outlet 24, and high-concentration micro-nano bubbles are discharged from the gas-liquid outlet 24.

[0034] The number of bubble cutting units 11 is not less than 3. The generation column 1 of the embodiment has 10 bubble cutting units 11 and has 9 pressure reduction grooves 14. The pressure in the generation column is measured, and the pressure at each position is shown in Table 1. When the gas-liquid mixed fluid enters the cylindrical section 232 of the gas-liquid inlet 23, the pressure is 0.4-1.0 Mpa. The cross-sectional area increases at the impact platform 15 and the pressure reduction groove 14, and the pressure reduction produces micro-nano bubbles. After 10 times of increasing the cross-sectional area and reducing the pressure, the pressure is 0.14-0.3 Mpa.

[0035] Table 1 Pressure value at the cross-sectional area increasing position

[0036]

[0037] The higher the pressure, the higher the gas solubility. Reducing the pressure can gradually release the dissolved gas (into bubbles), and the gas can produce micro-nano bubbles through impact collision. The bubble particle size and proportion can be controlled by increasing or reducing the number of pressure reduction times.

[0038] The mass transfer effects of different size bubbles are compared, and the results are shown in Table 2. Figure 5 Stratified Flow, Translent Flow, and Mist Flow respectively refer to stratified flow, translent flow, and mist flow, and the proportion of mist flow is large and the mass transfer effect is good. a, b, c, and d respectively refer to the mass transfer effect of large bubbles, the mass transfer effect of medium bubbles, the mass transfer effect of small bubbles, and the mass transfer effect of micro-nano bubbles. The medium bubbles in c are generated by using a Venturi ejector, and the micro-nano bubbles in d are generated by using the micro-nano bubble generator. The micro-nano bubble generator can reduce stratified flow and increase mist flow, and can improve the mass transfer efficiency by more than 30%. Compared with ordinary bubbles generated by a Venturi ejector, the mass transfer effect of micro-nano bubbles can be improved by 4 times.

[0039] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency micro-nano bubble generator, characterized in that: The application relates to a gas-liquid separation device, which comprises a shell and a generation column arranged in the shell, the shell is provided with a gas-liquid inlet and a gas-liquid outlet, a gas-liquid mixture entering from the gas-liquid inlet flows through the generation column and then flows out from the gas-liquid outlet, the generation column comprises a plurality of bubble cutting units, the surface of the bubble cutting unit is provided with a flow channel, and a pressure reduction groove is arranged between the bubble cutting units.

2. The high-efficiency micro-nano bubble generator according to claim 1, wherein: The flow channel is a spiral flow channel.

3. The high-efficiency micro-nano bubble generator according to claim 1, wherein: The inflow end of the bubble cutting unit is provided with a sawtooth surface.

4. The high-efficiency micro-nano bubble generator according to claim 1, wherein: The front end of the bubble cutting unit at the gas-liquid inlet end is provided with a collision platform.

5. The high-efficiency micro-nano bubble generator according to claim 4, wherein: The collision platform is a multi-stage circular platform, and the collision platform, the bubble cutting unit and the gas-liquid inlet are coaxially arranged.

6. The high-efficiency micro-nano bubble generator according to any one of claims 1-5, characterized in that: The shell comprises an outer shell and an inner shell, the generation column is arranged in the cavity of the inner shell, the gas-liquid inlet and the gas-liquid outlet are arranged at the two ends of the inner shell respectively, a gas chamber is arranged in the cavity of the outer shell, the gas inlet of the gas chamber is arranged on the outer shell, and the gas outlet of the gas chamber is communicated with the cavity of the inner shell.

7. The high-efficiency micro-nano bubble generator according to claim 6, wherein: The gas inlet of the gas chamber is located at the upper part of the outer shell, and the gas outlet of the gas chamber is located at the gas-liquid outlet.

8. The high-efficiency micro-nano bubble generator according to claim 1, wherein: The gas-liquid inlet comprises a gradually reduced volume horn mouth section and a cylindrical section, the diameter of the generation column is greater than the diameter of the cylindrical section and smaller than the maximum diameter of the horn mouth section.

9. The high-efficiency micro-nano bubble generator according to claim 1, wherein: The gas-liquid outlet is a gradually expanded volume horn mouth, the end of the generation column is provided with a circular conical platform section with gradually increased diameter, and the diameter of the circular conical platform section is smaller than the diameter of the bubble cutting unit.

10. The high-efficiency micro-nano bubble generator according to claim 1, wherein: The number of the bubble cutting units is not less than 3.

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