CN110479127A - A kind of micro-nano bubble generating device and the method for generating micro-nano bubble - Google Patents
A kind of micro-nano bubble generating device and the method for generating micro-nano bubble Download PDFInfo
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- CN110479127A CN110479127A CN201910650164.1A CN201910650164A CN110479127A CN 110479127 A CN110479127 A CN 110479127A CN 201910650164 A CN201910650164 A CN 201910650164A CN 110479127 A CN110479127 A CN 110479127A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/2319—Methods of introducing gases into liquid media
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3123—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements
- B01F25/31233—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements used successively
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
- B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
- B01F25/423—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
- B01F25/4231—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components using baffles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
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Abstract
The invention discloses a kind of micro-nano bubble generating device and the methods for generating micro-nano bubble, pressure (hydraulic) water forms high-speed jet by the spout of fluid injection pipe, by the viscous effect between water boundary layer and gas, gas is brought into preceding trunnion from air inlet pipe, the alternate collision of gas-liquid generates shearing force, and gas is compressed to form microbubble in foaming tube；Biphase gas and liquid flow containing microbubble enters flow deflector from foaming tube, it forms tangential swirl and enters convolution compressed pipe, the biggish microbubble of portion size strikes flow deflector and vanishes, and spiral groove high-speed of the fluid-mixing in convolution compressed pipe along tube wall, which circles round, to be compressed, and cutting forms micro-nano bubble；Enter diffuser using rear trunnion, the fluid-mixing progress secondary cut containing micro-nano bubble forms the smaller micro-nano stream that bubbles out and discharges.Fluid forms the high activity micro-nano bubble that small size, large specific surface area, momentum are big and oxygen carrying capacity is strong by jet stream, eddy flow, cutting and the compression process of high turbulent flow.
Description
Technical field
The present invention relates to mineral floatings and sewage air-flotation process field, and in particular to a kind of micro-nano bubble generating device and life
At the method for micro-nano bubble.
Background technique
Micron bubble will be usually known as having a size of 1~50 μm of bubble, size is known as nanometer bubble, the two system in 1 μm or less bubble
Referred to as micro-nano bubble.Micro-nano bubble has unique physico-chemical characteristic, if micro-nano bubble has larger surface area under identical size,
The residence time is long in the medium, and oxygen carrying capacity is strong, and gas-liquid mass transfer rate is high, interface point is high, activity is higher and can spontaneous generation
Free radical etc..
Micro-nano bubble manufacturing technology, which refers to, is quickly dispersed in gas in water body with the state of micron or nano grade air bubbles, micro-
Nanometer bubble manufacture is mainly pressure air-dissolving method, electrolysis deposition method and ultrasonic cavitation method.Document report is using 200 μm
The mesh electrode that metal microfibre is compiled into is electrolysed in water has obtained the micro-nano bubble that average-size is 777nm；To self-priming
Ejector device improves, and a spherula is set among pipeline, by gas after ball on tube wall micropore inhale people, in pipe by
High-velocity flow shear action forms micro-nano bubble；It is made at the high velocities using centrifugation multiphase pump and needle valve by Hydrodynamic cavitation method
Make the micro-nano bubble that average diameter is 150~200nm.
Summary of the invention
The object of the present invention is to provide a kind of micro-nano bubble generating devices, and it is tiny and finely dispersed micro- can to manufacture size
Nanometer bubble.
It is a further object of the present invention to provide the methods for generating micro-nano bubble by above-mentioned micro-nano bubble generating device.
To achieve the above object, The technical solution adopted by the invention is as follows: a kind of micro-nano bubble generating device, including sequentially
Preceding trunnion, foaming tube, convolution compressed pipe, rear trunnion and the diffuser of connection, input end and the gas-liquid mixed room of the preceding trunnion
Connection, the gas-liquid mixed room are equipped with air inlet pipe and fluid injection pipe, and the fluid injection pipe is vertical with the air inlet pipe to be set
It sets, the axis of the fluid injection pipe is overlapped with the axis of the foaming tube, is fixed in the end tube wall of the foaming tube
Flow deflector, at least three pieces flaabellum shape component being symmetrically evenly distributed centered on the flow deflector；In the convolution compressed pipe
The interior helicla flute equipped with same diameter, helicla flute diameter in 2~4mm,
The gas-liquid mixed room is in cylinder cone, and the foaming tube is cylindrical, the cylindrical section of the gas-liquid mixed room
Diameter be greater than the foaming tube diameter, it is described convolution compressed pipe and the diffuser longitudinal section it is tapered, convolution compression
The angle of throat α of pipe is between 11 °~14 °, and the angle of flare β of diffuser is between 50 °~60 °.
Preferably, the spout of the fluid injection pipe is conical nozzle of the cone angle gamma between 15 °~20 °.
Preferably, between the adjacent flaabellum shape component angle, θ between 30 °~60 °.
Preferably, the preceding trunnion, foaming tube, convolution compressed pipe, rear trunnion and diffuser longitudinal length ratio be 1:5~
6:5~6:1:1.
Preferably, the entire length phase of the length of the spout conical section of the fluid injection pipe and the gas-liquid mixed room
Together, driving fluid enters preceding trunnion.
The present invention also provides the methods for generating micro-nano bubble using above-mentioned micro-nano bubble generating device, comprising the following steps:
Pressure (hydraulic) water forms high-speed jet by the spout of fluid injection pipe, so that negative pressure is formed in gas-liquid mixed room, it will
Air is sucked by air inlet pipe, by the viscous effect between water boundary layer and gas, brings gas into preceding trunnion, water flow from air inlet pipe
Since the diminution of tube body cross section causes pressure energy gradually to convert to kinetic energy at preceding trunnion, flow velocity is accelerated, and gas-liquid two-phase is preceding
Trunnion forms strong turbulent fluctuation energy, and gas shearing, tearing, blending are formed a large amount of microbubbles by turbulent flow in foaming tube；
Biphase gas and liquid flow containing microbubble enters flow deflector from foaming tube, forms tangential swirl and enters convolution compression
Pipe, the biggish microbubble of portion size strike flow deflector and vanish, and fluid-mixing is in convolution compressed pipe along the helicla flute of tube wall
High speed convolution compression, and cut by the shearing force that the alternate collision of gas-liquid generates, form micro-nano bubble；
Enter diffuser using rear trunnion, due to the unexpected increase of diffuser cross section, lead to flows decrease, contains micro-nano
The kinetic energy of the mixed flow of rice bubble gradates as pressure energy, the shearing force generated by the alternate collision formation vortex of gas-liquid, into
Row secondary cut forms the smaller micro-nano stream that bubbles out and discharges.
Compared with prior art, the invention has the following beneficial effects:
Micro bubble generation device structure of the invention is simple, fluid by the jet stream, eddy flow, cutting of high turbulent flow with it is compressed
Journey forms size small (average-size is 1.74 μm), large specific surface area, the high activity micro-nano that momentum is big and oxygen carrying capacity is strong
Rice bubble.It is returned in drainage media in oil field fracturing, within the 30min time, micro-nano bubble oxygen carrying is increased to 2.99mg/ by 1.67mg/L
L, conventional bubble oxygen carrying are increased to 2.43mg/L by 1.67mg/L, and oxygen carrying capacity is higher by 33.53 percentage points；In the 60min time
Interior, micro-nano bubble oxygen carrying is increased to 3.57mg/L by 1.67mg/L, and conventional bubble oxygen carrying is increased to 2.79mg/L by 1.67mg/L,
Oxygen carrying capacity is higher by 46.7 percentage points.
Detailed description of the invention
Fig. 1 is micro-nano bubble generating device structural schematic diagram of the invention.
Fig. 2 is the micro-nano bubble that high magnification great depth microscope detects under 2000 × multiple.
Fig. 3 is the micro-nano bubble that high magnification great depth microscope detects under 3000 × multiple.
Fig. 4 is the micro-nano bubble that high magnification great depth microscope detects under 4000 × multiple.
Fig. 5 is the micro-nano bubble that high magnification great depth microscope detects under 5000 × multiple.
In figure: 1- fluid injection pipe；101- spout；2- gas-liquid mixed room；3- air inlet pipe；Trunnion before 4-；5- foaming tube；6-
Flow deflector；7- convolution compressed pipe；701- helicla flute；Trunnion after 8-；9- diffuser.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of micro-nano bubble generating device, including the preceding trunnion 4, foaming tube 5, convolution compression being sequentially connected to
The input end of pipe 7, rear trunnion 8 and diffuser 9, the preceding trunnion 4 is connected to gas-liquid mixed room 2, is set on the gas-liquid mixed room 2
There are air inlet pipe 3 and fluid injection pipe 1, the fluid injection pipe 1 is vertically arranged with the air inlet pipe 3, the fluid injection pipe 1
Axis is overlapped with the axis of the foaming tube 5.Flow deflector 6, the water conservancy diversion are fixed in the end tube wall of the foaming tube 5
At least three pieces flaabellum shape component being symmetrically evenly distributed centered on piece 6；Preferably, angle between the adjacent flaabellum shape component
θ is between 30 °~60 °；Flow deflector 6 is used for the larger-size microbubble of broken portions, while by the impact force of gas-liquid mixed stream
It decomposes and generates the power along 5 tangential direction of foaming tube, incision convolution compressed pipe 7.It is equipped in the convolution compressed pipe 7 identical
The helicla flute 701 of diameter, 701 diameter of helicla flute is in 2~4mm.
The gas-liquid mixed room 2 is in cylinder cone, and the foaming tube 5 is cylindrical, the cylinder of the gas-liquid mixed room 2
Section diameter be greater than the foaming tube 5 diameter, it is described convolution compressed pipe 7 and the diffuser 9 longitudinal section it is tapered, convolution
The angle of throat α of compressed pipe 7 makes fluid generate the eddy flow along side wall between 11 °~14 °, enhances turbulence dissipation rate, improves gas-liquid
Interphase mass transfer efficiency, for the angle of flare β of diffuser 9 between 50 °~60 °, it is alternate to increase gas-liquid for the alternate cutting effect of enhancing gas-liquid
The spout 101 of shear action range, the fluid injection pipe 1 is conical nozzle of the cone angle gamma between 15 °~20 °, is conducive to
Form high-speed jet.
The preceding trunnion 4, foaming tube 5, convolution compressed pipe 7, rear trunnion 8 and diffuser 9 longitudinal length ratio be 1:5~6:
5~6:1:1.
The length of 101 conical section of spout of the fluid injection pipe 1 is identical as the entire length of the gas-liquid mixed room 2,
Driving fluid enters preceding trunnion 4.
The course of work of above-mentioned micro-nano bubble generating device is as follows: the formation of spout 101 that pressure (hydraulic) water passes through fluid injection pipe 1
High-speed jet is sucked air by air inlet pipe 3, to form negative pressure in gas-liquid mixed room 2 by between water boundary layer and gas
Viscous effect, by gas bring into before trunnion 4, water flow is at preceding trunnion 4 since the diminution of tube body cross section leads to pressure gradually
It is converted to kinetic energy, flow velocity is accelerated, and gas-liquid two-phase forms strong turbulent fluctuation energy in preceding trunnion 4, and turbulent flow is by gas in foaming tube 5
Shearing, tearing, blending form a large amount of microbubbles；
Biphase gas and liquid flow containing microbubble enters flow deflector 6 from foaming tube 5, forms tangential swirl and enters convolution compression
Pipe 7, the biggish microbubble of portion size strike flow deflector 6 and vanish, and fluid-mixing is in convolution compressed pipe 7 along the spiral of tube wall
Slot 701 circles round at a high speed compression, and is cut by the shearing force that the alternate collision of gas-liquid generates, and micro-nano bubble is formed；
Enter diffuser 9 using rear trunnion 8 is led to flows decrease, is contained due to the unexpected increase of 9 cross section of diffuser
The kinetic energy of the mixed flow of micro-nano bubble gradates the shearing generated by the alternate collision formation vortex of gas-liquid for pressure energy
Power, progress secondary cut form the smaller micro-nano stream that bubbles out and discharge.
Micro-nano bubble size detection uses clean water experiment.
Certain volume clear water is placed in glass flume, starting is connect with micro-nano bubble generation device and glass flume respectively
Centrifugal pump, pass through micro-nano bubble generation device manufacture micro-nano bubble.When detection, a glass slide is put into glass flume, is made
The micro-nano bubble of generation is attached on glass slide.Glass slide is taken out after standing several minutes, using high magnification great depth microscope
Respectively 2000 ×, 3000 ×, 4000 × and 5000 × multiple under the microbubble adhered on glass slide is observed.Such as Fig. 2-
Shown in Fig. 5, the bubble size observed is respectively less than 5 μm, and average-size is 1.74 μm, and largest air bubbles diameter is 4.42 μm, most
Small bubble size is 780nm.Quantity accounting having a size of 1~2 μm of bubble is 73.76%, is accounted for having a size of 3~5 μm of number of bubbles
Than being 4.95%.
The experiment of micro-nano bubble oxygen carrying capacity.
It is returned in drainage media in oil field fracturing, within the 30min time, micro-nano bubble oxygen carrying is increased to by 1.67mg/L
2.99mg/L, conventional bubble oxygen carrying are increased to 2.43mg/L by 1.67mg/L, and oxygen carrying capacity is higher by 33.53 percentage points；In
In the 60min time, micro-nano bubble oxygen carrying is increased to 3.57mg/L by 1.67mg/L, and conventional bubble oxygen carrying is increased to by 1.67mg/L
2.79mg/L, oxygen carrying capacity are higher by 46.7 percentage points.
Claims (6)
1. a kind of micro-nano bubble generating device, which is characterized in that including the preceding trunnion (4), foaming tube (5), convolution being sequentially connected to
The input end of compressed pipe (7), rear trunnion (8) and diffuser (9), the preceding trunnion (4) is connected to gas-liquid mixed room (2), described
Gas-liquid mixed room (2) is equipped with air inlet pipe (3) and fluid injection pipe (1), the fluid injection pipe (1) and the air inlet pipe (3)
It is vertically arranged, the axis of the fluid injection pipe (1) is overlapped with the axis of the foaming tube (5), at the end of the foaming tube (5)
It is fixed in end pipe wall flow deflector (6), at least three pieces flaabellum shape structure being symmetrically evenly distributed centered on the flow deflector (6)
Part is equipped with helicla flute (701) of same diameter in convolution compressed pipe (7), helicla flute (701) diameter in 2~4mm,
The gas-liquid mixed room (2) is in cylinder cone, and the foaming tube (5) is cylindrical, the circle of the gas-liquid mixed room (2)
Shell of column diameter is greater than the diameter of the foaming tube (5), and convolution compressed pipe (7) and the longitudinal section of the diffuser (9) are in
Taper, the angle of throat α of convolution compressed pipe (7) is between 11 °~14 °, and the angle of flare β of diffuser (9) is between 50 °~60 °.
2. a kind of micro-nano bubble generating device according to claim 1, which is characterized in that the fluid injection pipe (1)
Spout (101) is conical nozzle of the cone angle gamma between 15 °~20 °.
3. a kind of micro-nano bubble generating device according to claim 1, which is characterized in that the adjacent flaabellum shape component
Between angle, θ between 30 °~60 °.
4. a kind of micro-nano bubble generating device according to claim 1, which is characterized in that the preceding trunnion (4), foaming tube
(5), the longitudinal length ratio of convolution compressed pipe (7), rear trunnion (8) and diffuser (9) is 1:5~6:5~6:1:1.
5. a kind of micro-nano bubble generating device according to claim 1, which is characterized in that the fluid injection pipe (1)
The length of spout (101) conical section is identical as the entire length of the gas-liquid mixed room (2).
6. a kind of method for generating micro-nano bubble using described in any one of claim 1 to 55 described in any item micro-nano bubble generating devices, special
Sign is, comprising the following steps:
Pressure (hydraulic) water forms high-speed jet by the spout (101) of fluid injection pipe (1), to be formed in gas-liquid mixed room (2)
Negative pressure is sucked air by air inlet pipe (3), by the viscous effect between water boundary layer and gas, by gas from air inlet pipe (3) band
Enter preceding trunnion (4), water flow at preceding trunnion (4) due to the diminution of tube body cross section cause pressure energy gradually to kinetic energy convert, stream
Speed is accelerated, and gas-liquid two-phase forms strong turbulent fluctuation energy in preceding trunnion (4), and gas is sheared, torn by turbulent flow in foaming tube (5)
It splits, blend and form a large amount of microbubbles；
Biphase gas and liquid flow containing microbubble enters flow deflector (6) from foaming tube (5), forms tangential swirl and enters convolution compression
It manages (7), the biggish microbubble of portion size strikes flow deflector (6) and vanishes, and fluid-mixing is in convolution compressed pipe (7) along tube wall
Helicla flute (701) high speed convolution compression, and by gas-liquid it is alternate collision generate shearing force cut, formation it is micro-nano
Bubble；
Entering diffuser (9) using rear trunnion (8) leads to flows decrease due to the unexpected increase of diffuser (9) cross section,
The kinetic energy of the mixed flow containing micro-nano bubble gradates the shearing generated by the alternate collision formation vortex of gas-liquid for pressure energy
Power, progress secondary cut form the smaller micro-nano stream that bubbles out and discharge.
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