CN108671779B - A kind of fine gas bubbles generator - Google Patents
A kind of fine gas bubbles generator Download PDFInfo
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- CN108671779B CN108671779B CN201810596063.6A CN201810596063A CN108671779B CN 108671779 B CN108671779 B CN 108671779B CN 201810596063 A CN201810596063 A CN 201810596063A CN 108671779 B CN108671779 B CN 108671779B
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- micropore
- air inlet
- flow
- conveyor screw
- flow rotation
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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
-
- 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
- B01F23/2366—Parts; Accessories
-
- 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
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
- B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
-
- 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
- B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
- B01F25/72—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/305—Treatment of water, waste water or sewage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
It the invention discloses a kind of fine gas bubbles generator, is composed of air-flow Inlet Swirl accelerator, micropore diffuser plate (3), conveyor screw (2), nozzle body (1) sequential connection.The air-flow Inlet Swirl accelerator includes air inlet pipe (4.1), flow rotation accelerating tube (4), round estrade (5), and the cavity formed between round estrade (5) and flow rotation accelerating tube (4) is flow rotation inner cavity (4.3)；The body of micropore diffuser plate (3) is micropore (13) that is cylindric, being less than 0.5mm with multiple equally distributed diameters are laser machined out along axial direction on its cross section；The gas outlet of the nozzle body (1) is diffusing cone (1.1).The present invention can generate extremely small bubble, form small mist pearl in water and float in water, and be not easy to emerge, and meet the needs of aeration processing sewage.
Description
Technical field
The invention belongs to a kind of bubble generators, and in particular to a kind of microbubble generation of sewage treatment field aerator
Device can be widely applied in aeration processing trade effluent, municipal sewage.
Background technique
Currently, the water environment treatment technology in China mainly packet physical technique, chemical technology, biotechnology and complex art
Application etc..Wherein, aeration oxygen replenishing technology is technology most crucial in physical technique, especially handles the pollution of organic matter, is exposed
Gas method is most efficient method.
Aeration can be divided into blast aeration, mechanical aeration, deep well aeration, pure oxygen or oxygen-enriched aeration.No matter that aeration
All it be unable to do without bubble generator.The function of bubble generator is that air is filled into sewage, and the oxygen in air is enable to fill
It is dissolved into sewage with dividing.Bubble caused by generator is smaller, thinner, then solubility is higher, and aeration effect is better.At present
Bubble generator is various informative, many kinds of, all there is a problem that bubble is larger, solubility is lower mostly.
The bubble for generating bubble generator reaches the objective of the struggle that nanoscale is the art.Nearly 2 years,
Higher dissolved oxygen efficiency in order to obtain, micro-nano bubble generation technique is in water process, aquaculture, Rice Cropping, soilless cultivation
Equal fields are widely used to obtain tremendous development.And micro-nano bubble occurrence of equipment in the prior art it is generally existing it is following not
Foot: (1) its core component uses merely gas-liquid mixing pump, although dissolved efficiency, up to 80-100%, inspiratory capacity is only 8-
10%；(2) although increase inspiratory capacity can be used in series with gas-liquid mixing pump, increase equipment funds investment and equipment
Power increases equipment operating cost.
Chinese patent application 201611207780.2 disclose a kind of micro-nano bubble generator for sewage treatment and
Its working method, by water tank, micro-nano bubble generator, gasing pump, intelligent controller, appendix, gas flow control valve
Composition.Clear water is equipped with inside the water tank, baseplane is equipped with micro-nano bubble generator, the intelligent controller inside water tank
Positioned at water tank upper surface, the gasing pump is located at intelligent controller side, and gasing pump is connect with intelligent controller polygon control survey, defeated
Air pump hose is connected with external gas cylinder；Described appendix one end connects gasing pump, and the appendix other end is connected to micro-nano bubble
Generating device, the gas flow control valve are located at appendix external diameter surface, gas flow control valve and intelligent controller conducting wire
Control connection.But structure is complicated for the bubble generator, similarly there is a problem that manufacturing and being applicable at high cost.
Summary of the invention
The purpose of the present invention is being directed to the problem that bubble is larger, solubility is lower existing for existing emitting bubbles device, and mention
For a kind of generation bubble it is small, being capable of evenly dispersed fine gas bubbles generator in water.
Above-mentioned purpose to realize the present invention, a kind of fine gas bubbles generator of the present invention use following technical scheme:
A kind of fine gas bubbles generator of the present invention, be by air-flow Inlet Swirl accelerator, micropore diffuser plate, conveyor screw,
Nozzle body sequential connection is composed.The air-flow Inlet Swirl accelerator includes air inlet pipe, flow rotation accelerating tube, circle
Stage body, air inlet pipe tangentially connect with the internal cavity of flow rotation accelerating tube and constitute overall structure, the conical section of round estrade
It is inserted into the centre in flow rotation accelerating tube, the bottom seat board of round estrade and the air inlet end flanges of flow rotation accelerating tube
It being connected and fixed by end bolt group, the cavity formed between round estrade and flow rotation accelerating tube is flow rotation inner cavity, by
In being additionally arranged round estrade, the section of flow rotation inner cavity is further reduced, improves gas rotating flow velocity, make gas in high pressure
The lower rotation of turbulent flow；The nozzle body) gas outlet be diffusing cone, the inlet end of nozzle body is end flange, nozzle body it is interior
Chamber is respectively micropore diffuser plate installation cavity, conveyor screw installation cavity from inlet end to outlet side；Micropore diffuser plate installation cavity is provided with
Micropore diffuser plate, the body of micropore diffuser plate be it is cylindric, multiple uniformly divided along axial with laser machining out on its cross section
The diameter of cloth is less than the micropore of 0.5mm；Conveyor screw installation cavity is provided with conveyor screw；The outlet side of the conveyor screw installation cavity
End face is that conveyor screw installs resonator end surface, installs in conveyor screw and is equipped with fumarole between resonator end surface and diffusing cone, in actual use,
By adjusting the admission pressure of external high pressure gas pipeline, the injection pressure of fumarole is controlled between 0.2-0.7Mpa；Nozzle body
The end flange of inlet end and the outlet end flanges of flow rotation accelerating tube connect the connection of bolt group by intermediate.The air inlet
The basal area of the inlet channel of pipe is gradually reduced, and accelerates for air-flow.
In order to ensure the sealing of connecting portion, in the bottom seat board of round estrade and the air inlet end flanges of flow rotation accelerating tube
Between gap location be equipped with O-ring；Between between the outlet end flanges of flow rotation accelerating tube and the end flange of nozzle body
O-ring also is provided at gap.
In micropore of multiple equally distributed diameters less than 0.5mm, the spacing between adjacent micropore is not more than
1.5mm is advisable with 0.9-1.4mm；The diameter of micropore is preferred between 0.42- 0.48mm
The cone angle of the diffusing cone is 50-70 °, is advisable with 55-65 °.
The air inlet flange of the air inlet pipe uses square flange, and air inlet flange passes through side bolt group and external high pressure
The hemispherical dome connector of appendix connects.
A kind of fine gas bubbles generator of the present invention will be pressed into the air of generator by accelerating convolution again using physical method
By micropore diffuser plate, become small bubble after air is spread, be allowed to become high pressure turbulent flow gas using accelerating to circle round,
High pressure gas depressurizes to spread through diffusing cone using small spray apparatus mouth suddenly again to be sprayed, and such high pressure gas is formed subtle
Bubble sprays generator.
A kind of fine gas bubbles generator of the present invention has the positive effect that after the above technical solution is adopted:
(1) it is composed of air-flow Inlet Swirl accelerator, micropore diffuser plate, conveyor screw, nozzle body sequential connection, gas
Stream is by spinning up, micropore is spread, secondary rotating accelerates, and sprays from fumarole, using diffusing cone bubble meeting after diffusing cone
Become smaller, more carefully spray into sewage.
(2) extremely small bubble is generated, small mist pearl is formed in water and floats in water, and be not easy to emerge,
Meet the needs of aeration processing sewage.
(3) microbubble generator is reasonable in design, reliable for operation, adaptable.
(4) operational efficiency is high, has the characteristics that energy-efficient.
Detailed description of the invention
Fig. 1 is a kind of fine gas bubbles generator architecture assembling schematic diagram of the present invention；
Fig. 2 is the schematic diagram in A-A direction in Fig. 1；
Fig. 3 is the conveyor screw schematic perspective view that the present invention uses；
Fig. 4 is the nozzle body schematic cross-sectional view that the present invention uses；
Fig. 5 is the micropore diffuser plate cross-section diagram that the present invention uses；
Fig. 6 is the round estrade structural schematic diagram that the present invention uses.
1- nozzle body；1.1- diffusing cone；1.2- fumarole；1.3- conveyor screw installs resonator end surface；The installation of 1.4- conveyor screw
Chamber；1.5- end flange；1.6- micropore diffuser plate installs resonator end surface；1.7- micropore diffuser plate installation cavity；2- conveyor screw；3- is micro-
Hole diffuser plate；4- flow rotation accelerating tube；4.0- air inlet flange；4.1- air inlet pipe；4.2- inlet channel；4.3- flow rotation
Inner cavity；5- round estrade；6-O type circle；7- end bolt group；The side 8- bolt group；Bolt group is connected among 9-；10- square flange；
The bottom 11- seat board；12- air inlet end flanges；12 '-outlet end flanges；13- micropore.
Specific embodiment
To better describe the present invention, a kind of fine gas bubbles generator of the present invention is made with reference to the accompanying drawing further detailed
Explanation.
A kind of fine gas bubbles generator architecture assembling schematic diagram of the present invention and combination Fig. 2, Fig. 3, Fig. 4, figure as shown in Figure 1
5, Fig. 6 finds out, a kind of fine gas bubbles generator of the present invention is by air-flow Inlet Swirl accelerator, micropore diffuser plate 3, conveyor screw
2, the sequential connection of nozzle body 1 is composed.The air-flow Inlet Swirl accelerator includes that air inlet pipe 4.1, flow rotation add
Fast pipe 4, round estrade 5；Air inlet pipe 4.1 tangentially connects with the internal cavity of flow rotation accelerating tube 4 and constitutes overall structure, by not
The welding of rust steel is cast, and the basal area of the inlet channel 4.2 of air inlet pipe 4.1 is gradually reduced, and is accelerated for gas；Rotary table
The conical section of body 5 is inserted into the centre in flow rotation accelerating tube 4, the bottom seat board 11 and flow rotation of round estrade 5
The air inlet end flanges 12 of accelerating tube 4 are connected and fixed by end bolt group 7, are formed between round estrade 5 and flow rotation accelerating tube 4
Cavity be flow rotation inner cavity 4.3, allow the air-flow basal area of walking to further reduce, and then accelerate gas flow rate for the second time.
The gas outlet of the nozzle body 1 is diffusing cone 1.1, and the cone angle of diffusing cone 1.1 is 50-70 °, generally 60 ° or so.Nozzle body
1 inlet end is end flange 1.5, and the inner cavity of nozzle body 1 is respectively micropore diffuser plate installation cavity from inlet end to outlet side
1.7, conveyor screw installation cavity 1.4, the internal diameter of micropore diffuser plate installation cavity 1.7 is slightly larger than the internal diameter of conveyor screw installation cavity 1.4, micro-
Hole diffuser plate installation cavity 1.7 and 1.4 junction of conveyor screw installation cavity are that micropore diffuser plate installs resonator end surface 1.6；Micropore diffuser plate
Installation cavity 1.7 is provided with micropore diffuser plate 3, and micropore diffuser plate 3 is made of stainless steel, and the body of micropore diffuser plate 3 is cylinder
Shape, along the axial micropore 13 for being less than 0.5mm with multiple equally distributed diameters are laser machined out on its cross section, adjacent is micro-
Spacing between hole 13 is not more than 1.5mm.Conveyor screw installation cavity 1.4 is provided with conveyor screw 2；The conveyor screw installation cavity 1.4
Outlet side end face be that conveyor screw installs resonator end surface 1.3, installed in conveyor screw and be equipped with spray between resonator end surface 1.3 and diffusing cone 1.1
Stomata 1.2；The end flange 1.5 of 1 inlet end of nozzle body is connected with the outlet end flanges 12 ' of flow rotation accelerating tube 4 by centre
Connecting bolt group 9 connects.Gap between the bottom seat board 11 of round estrade 5 and the air inlet end flanges 12 of flow rotation accelerating tube 4
Place is equipped with O-ring 6；Gap between the outlet end flanges 12 ' of flow rotation accelerating tube 4 and the end flange 1.5 of nozzle body 1
Place also is provided with O-ring 6.
Clean high pressure gas is transported to by high pressure gas pipeline and is located under water by the high pressure gas after secondary filter
Fine gas bubbles generator in.The schematic diagram in A-A direction in Fig. 1 as shown in Figure 2 finds out, the air inlet of the air inlet pipe 4.1
To be rectangular, the air inlet flange 4.0 of air inlet pipe 4.1 uses square flange, air inlet flange 4.0 by side bolt group 8 with it is external
The hemispherical dome connector of high pressure gas pipeline connects.The structure and wind power rotational flow device of air-flow Inlet Swirl accelerator are somewhat like,
Air-flow is to enter flow rotation inner cavity 4.3 by the inlet channel 4.2 of air inlet pipe 4.1 from side with near-tangential direction, due to circle
The effect of stage body 5 reduces the section of flow rotation inner cavity 4.3 further, improves gas rotating flow velocity, makes gas in high pressure
The lower rotation of turbulent flow, then gas enters in micropore diffuser plate 3.Micropore diffuser plate 3 is made of stainless steel, and body is cylindric, In
Along the axial micropore 13 for being less than 0.5mm with diameter is laser machined out on its cross section, the gas outlet of micropore 13 is equipped with miniature diffusion
Cone mouth.
It can be spread rapidly after the air-flow of high-pressure rotary flows through micropore 13 and split into small bubble, these small bubbles
Into in the conveyor screw installation cavity 1.4 being located in nozzle body 1, once spun up by fumarole again by conveyor screw 2
1.2 spray, and after diffusing cone 1.1, bubble can become smaller, more carefully spray into sewage.In actual use, pass through tune
The admission pressure of external high pressure gas pipeline is saved, controls the injection pressure of fumarole 1.2 between 0.2-0.7Mpa.
The nozzle body schematic cross-sectional view that the present invention as shown in Figure 4 uses finds out, 60 ° of left sides of cone angle of diffusing cone 1.1
The right side, diffusing cone 1.1 can make to spray the gas flow optimized expanded suddenly from fumarole 1.2 can make air-flow spray more in certain angle
Far, the injection pressure of fumarole 1.2 should be between 0.2-0.7Mpa, and the micro-bubble of ejection is all in 1mm or less or smaller, by this
Slightly small bubble is dispersed in sewage.The conveyor screw installation cavity 1.4 designed in nozzle body 1 is for accommodating conveyor screw 2
Accommodation chamber, the micropore diffuser plate installation cavity 1.7 designed in nozzle body 1 are the accommodation chambers for accommodating micropore diffuser plate 3.
The schematic perspective view of conveyor screw 2 is as shown in figure 3, the helical blade direction of rotation of conveyor screw 2 should add with rotation
The air-flow rotation direction of speed is identical, all uses dextrorotation.
The cross-section diagram of micropore diffuser plate 3 is as shown in figure 5, it is process by stainless steel, it is also possible to which other microwell plates replace
Such as metal sintering porous plate.
Claims (6)
1. a kind of fine gas bubbles generator, it is characterised in that: it be by air-flow Inlet Swirl accelerator, micropore diffuser plate (3),
Conveyor screw (2), nozzle body (1) sequential connection are composed；The air-flow Inlet Swirl accelerator includes air inlet pipe
(4.1), flow rotation accelerating tube (4), round estrade (5), air inlet pipe (4.1) and the internal cavity of flow rotation accelerating tube (4) are cut
To connecting and constituting overall structure, the conical section of round estrade (5) is inserted into the centre in flow rotation accelerating tube (4),
The bottom seat board (11) of round estrade (5) and the air inlet end flanges (12) of flow rotation accelerating tube (4) are connected by end bolt group (7)
Fixation is connect, the cavity formed between round estrade (5) and flow rotation accelerating tube (4) is flow rotation inner cavity (4.3)；The spray
The gas outlet of mouth body (1) is diffusing cone (1.1), and the cone angle of the diffusing cone (1.1) is 50-70 °, the air inlet of nozzle body (1)
End be end flange (1.5), the inner cavity of nozzle body (1) be respectively from inlet end to outlet side micropore diffuser plate installation cavity (1.7),
Conveyor screw installation cavity (1.4)；Micropore diffuser plate installation cavity (1.7) is provided with micropore diffuser plate (3), the shape of micropore diffuser plate (3)
Body be it is cylindric, along axial with laser machining out multiple equally distributed diameters between 0.42-0.5mm on its cross section
Micropore (13)；Conveyor screw installation cavity (1.4) is provided with conveyor screw (2)；The outlet side end face of the conveyor screw installation cavity (1.4)
Resonator end surface (1.3) are installed for conveyor screw, fumarole is equipped between conveyor screw installation resonator end surface (1.3) and diffusing cone (1.1)
(1.2), by adjusting the admission pressure of external high pressure gas pipeline, the injection pressure of fumarole (1.2) is controlled in 0.2-0.7Mpa
Between；During the end flange (1.5) of nozzle body (1) inlet end and the outlet end flanges (12 ') of flow rotation accelerating tube (4) pass through
Between connection bolt group (9) connection；The basal area of the inlet channel (4.2) of the air inlet pipe (4.1) is gradually reduced；It is described into
The air inlet of tracheae (4.1) be it is rectangular, the air inlet flange (4.0) of air inlet pipe (4.1) uses square flange, air inlet flange
(4.0) it is connect by side bolt group (8) with the hemispherical dome connector of external high pressure gas pipeline.
2. a kind of fine gas bubbles generator as described in claim 1, it is characterised in that: in the bottom seat board of round estrade (5)
(11) gap location between the air inlet end flanges (12) of flow rotation accelerating tube (4) is equipped with O-ring (6)；In flow rotation plus
Gap location between the outlet end flanges (12 ') of speed pipe (4) and the end flange (1.5) of nozzle body (1) also is provided with O-ring (6).
3. a kind of fine gas bubbles generator as claimed in claim 2, it is characterised in that: the spacing between adjacent micropore (13)
No more than 1.5mm.
4. a kind of fine gas bubbles generator as claimed in claim 1,2 or 3, it is characterised in that: between adjacent micropore
Away from 0.9-1.4mm；The diameter of micropore is between 0.42-0.48mm.
5. a kind of fine gas bubbles generator as claimed in claim 4, it is characterised in that: the cone angle of the diffusing cone is 55-
65°。
6. a kind of fine gas bubbles generator as claimed in claim 5, it is characterised in that: the gas outlet of the micropore (13) is equipped with
Miniature diffusion cone mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596063.6A CN108671779B (en) | 2018-06-11 | 2018-06-11 | A kind of fine gas bubbles generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596063.6A CN108671779B (en) | 2018-06-11 | 2018-06-11 | A kind of fine gas bubbles generator |
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| Publication Number | Publication Date |
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| CN108671779A CN108671779A (en) | 2018-10-19 |
| CN108671779B true CN108671779B (en) | 2019-10-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109550418B (en) * | 2018-12-04 | 2021-02-05 | 浙江大学 | Spiral-flow type microbubble generator and gas-liquid reactor |
| CN109502780B (en) * | 2019-01-18 | 2020-09-11 | 清华大学 | Multi-stage cyclone microbubble releaser and dissolved gas release system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203513375U (en) * | 2013-11-14 | 2014-04-02 | 川源(中国)机械有限公司 | Jet aeration stirrer |
| TWM487134U (en) * | 2014-06-06 | 2014-10-01 | Ching-Ho Lai | Micro-bubble generating device |
| CN204803094U (en) * | 2015-05-30 | 2015-11-25 | 四川省凯明机械制造有限公司 | Aerator suitable for jet aerator |
| CN204779078U (en) * | 2015-05-30 | 2015-11-18 | 四川省凯明机械制造有限公司 | A multi nozzle formula aerator for efflux aeration machine |
| CN106732057A (en) * | 2016-12-23 | 2017-05-31 | 徐州工程学院 | A kind of micro-nano bubble generator and its method of work for sewage disposal |
| CN107744732B (en) * | 2017-11-27 | 2021-06-01 | 北京石油化工学院 | Tubular micro-bubble generator |
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2018
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