CN109731491A - A kind of double-current micro-nano bubble method for generation of jetting type and device of clashing - Google Patents
A kind of double-current micro-nano bubble method for generation of jetting type and device of clashing Download PDFInfo
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- CN109731491A CN109731491A CN201810950813.5A CN201810950813A CN109731491A CN 109731491 A CN109731491 A CN 109731491A CN 201810950813 A CN201810950813 A CN 201810950813A CN 109731491 A CN109731491 A CN 109731491A
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- 239000002101 nanobubble Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000009792 diffusion process Methods 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 239000006260 foam Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 14
- 230000008602 contraction Effects 0.000 description 5
- 238000005273 aeration Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005276 aerator Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 238000010943 off-gassing Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- 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
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention discloses a kind of micro-nano bubble method for generation of double fluid head-on collision jetting type and devices, including Venturi tube, there are two the Venturi tube settings, beneficial effect is: present invention employs the designs of the structure of double-current collision type, opposite hit occurs for two strands of fluids containing micro-nano bubble, produce 1.5-3 times of turbulence intensity higher than traditional single tube jet stream, promote micro-nano second-time breakage, generate micro-nano bubble more, partial size becomes uniform, the present invention passes through two bursts of foam stream head-on collisions, the diffusion way of micro-nano bubble is set to become 360 ° of annular disk-shaped forms, be conducive to the diffusion of micro-nano bubble, since special collision type structure designs, reaction force very little of the water body to it, therefore when the device works under water, without the fixed device of others, convenience greatly improves, the present invention and traditional Single tube venturi arrangement is compared, and to same particle size is generated, under identical micro-nano number of bubbles requires, required energy consumption is lower.
Description
Technical field:
The invention belongs to Water-quality treater technical fields, in particular to a kind of double fluid head-on collision micro-nano bubble generation side of jetting type
Method and device.
Background technique:
The concentration level of oxygen in water indicates that the self-purification capacity in waters uses exposure at present in comprehensive water body Ecological Restoration Project
The dissolved oxygen that device of air improves water body is a key point technological means.
Under the same conditions, micro-nano aeration is compared with common aeration method, and micro-nano aeration method is in the same time
The tolerance of Xiang Shuizhong input is more, and the range of effect is wider.Micro-nano aerator is small in size, uses than traditional aerator
It is more convenient to come, and energy consumption is lower, also, micro-nano bubble can be kept for a long time in water, can greatly improve the molten of water body
Oxygen is solved, and when bubble diameter is less than 50 microns, bubble interface is in elecrtonegativity, has very strong adsorption capacity, and air flotation effect is bright
It is aobvious, while adhering to some free radicals for having oxidability around micro-nano bubble, high concentration is provided for water restoration system
Active oxidizer can greatly improve the overall target of water body, so the present invention is novel to propose a kind of double fluid head-on collision jetting type micro-nano
Rice bubble method for generation and device, the present invention is based on venturi fluid jets, are designed, are realized using unique double-current collision type structure
The effect of more stable micro-nano bubble preparation.Before the present invention and this method are made, domestic and international other micro-nano bubbles
Method for generation have pressure air-dissolving outgassing method, water temperature difference method, electric field method, microwave method, venturi fluid jet etc., based on above several
Method cooperates the devices such as rotary-cut, centrifugation to prepare micro-nano bubble.
Wherein, pressure air-dissolving outgassing method and its relevant apparatus are by changing gas pressure, making in special dissolving
Solubility changes gas in a liquid, then analyses the gas of dissolution with micro-nano bubble form by unexpected pressure recovery
Out, the micro-nano number of bubbles of precipitation is more, uniform particle sizes, but the molten gas low efficiency of the dissolving of the device, whole operation are multiple
It is miscellaneous, manufacturing cost is high, energy consumption is high, and it is most of apply in air flotation technology, application field range is small.Water temperature difference method is bright using cold
When hot water mixes, water at low temperature has gas releasing, and to prepare generation nano bubble, but the method is unable to accurately control the temperature of water temperature
Difference, and prepared micro-nano number of bubbles is few, and the workpiece of this device is more, and cooperation is complicated, and energy consumption is high.Electric field method
It is to generate micro-nano bubble in positive/negative plate respectively by being powered in water.The microbubble diameter that this occurring mode generates is big
Mostly between 20~60 μm, the controllability of bubble size is good, but the disadvantages of there are bubbles volumes less, consumption of electrode, higher energy consumption,
There is strict demand to electrolysis unit in many practical applications.
Venturi fluid jet is to be allowed to gas crushing to form micro-nano bubble entrance by utilizing various shearing forces
In liquid phase, the method is easy to operate, and energy consumption is lower, and the micro-nano bubble generator of venturi jetting type has " structure because of it
It is compact, be not easy to plug, flux it is big " the advantages that have important application potentiality, still, traditional single tube venturi type fluidic device by
360 ° omni-directional jet stream cannot be formed in jet direction is single, and the diffusion when water bodies of rivers and lakes is applied of the micro-nano bubble of generation is uneven
It is even, diffusion is insufficient, while pressure needed for jet stream is larger causes energy consumption higher, and therefore, the present invention proposes a kind of to penetrate based on head-on collision
The 360 ° of micro-nano bubble method for generation and generating device of stream, can easily form the generation and diffusion of 360 ° of micro-nano bubbles,
Jet pressure needed for reducing simultaneously and energy consumption can obtain the micro-nano bubble of smaller particle size, this is that micro-nano bubble generation technique is wide
The general necessity applied to water bodies of rivers and lakes processing.
Summary of the invention:
The object of the invention is that providing a kind of micro-nano bubble of double fluid head-on collision jetting type to solve the above-mentioned problems and occurring
Method and device solves the disadvantage that the prior art.
To solve the above-mentioned problems, the present invention provides a kind of technical solutions:
A kind of double-current the clash micro-nano bubble method for generation of jetting type and device, including Venturi tube, the Venturi tube setting
There are two, the Venturi tube is set on fixed disc, and the Venturi tube upper end is provided with water inlet, the Venturi tube
Water inlet on the center location of fixed disc, the fixed disc intert be provided with several fixed links, the fixed link
On be arranged with screw, each fixed link is vertically connected with two fixed discs, be parallel to each other between each fixed link,
Two fixed discs are parallel to each other, and collapsible tube is connected with below the water inlet, and the water inlet and collapsible tube are one
Whole, the contraction pipe end side is provided with trunnion, air inlet is provided in the Venturi tube, and the Venturi tube is opposite
Water inlet one end is provided with water outlet, it is described to shrink the gap for having a spacing very little between pipe end and trunnion, the receipts
There is a gap between draw outer wall and air inlet, head-on collision gap is provided between two Venturi tubes.
Preferably, by fixed link and the removable connection of screw between the fixed disc, each fixed link away from
From being equidistant for fixed disc center, the distance between every two adjacent described fixed link is equal.
Preferably, the contraction pipe end is a bit of cylinder-like structure, do not have between the collapsible tube and air inlet
Directly it is connected to.
Preferably, the gap shunk between pipe outer wall and air inlet annularly surrounds collapsible tube lower end.
Preferably, the gap between the collapsible tube and trunnion and the gap phase between contraction pipe outer wall and air inlet
It is logical.
Preferably, the air inlet is located at outside venturi arrangement.
Preferably, being connected with diffuser between the water outlet and trunnion.
Preferably, the length range in the head-on collision gap is between 0.1cm-100cm.
Preferably, its bubble method for generation are as follows:
1) suction pump respectively, is connected to by the water inlet of two sides first, the air inlet in two symmetrical Venturi tubes is respectively
It is connected to a soft pipe, gas flowmeter can be installed on two soft pipes, detects the air inflow of two sides Venturi tube respectively,
And all with the device for adjusting air inflow on two soft pipes, it is ensured that the air inflow of two air inlets keeps identical.
2), high pressure water flow flows through water inlet and collapsible tube, and is tentatively mixed into larynx in collapsible tube end cavity and gas
Pipe, is sufficiently mixed collision in trunnion, is sprayed in the form of foam stream through diffuser, and two strands of gas liquid mixtures of ejection still have very big
Kinetic energy, collide in collision gap location, while obtaining more micro-nano bubbles, the diffusion path of micro-nano bubble is by straight
Line diffusion becomes 360 ° of disc shaped plane diffusion.
3) when, using this device, which should be vertically placed in water body, the diffusingsurface for keeping micro-nano bubble initial with
Water surface keeping parallelism can according to circumstances come vertical position of the free regulating device in water body since the device is separated with pump machine
It sets, to guarantee that quantity and micro-nano final diffusion way, the suction pump of the micro-nano bubble of generation are booster pump, water pump
Lift is 30-40m, and soft pipe uses PVC material hose, and the gas flow is calculated as electronic flowmeter, the diffuser
11 diffusion angle is 5 ° -15 °, clashes clearance distance between 0.1-100cm.
Beneficial effects of the present invention:
Present invention employs the design of the structure of double-current collision type, opposite shock occurs for two strands of fluids containing micro-nano bubble, generates
Higher than traditional single tube jet stream 1.5-3 times of turbulence intensity, promotes micro-nano second-time breakage, the number for generating micro-nano bubble
Amount is more, and partial size becomes uniformly, and the present invention makes the diffusion way of micro-nano bubble become 360 ° by two bursts of foam stream head-on collisions
Annular disk-shaped form is conducive to the diffusion of micro-nano bubble, since special collision type structure designs, anti-work of the water body to it
Firmly very little, the therefore when device works under water, without other fixed devices, convenience is greatly improved, and the present invention and is passed
The single tube venturi arrangement of system is compared, and to same particle size is generated, under identical micro-nano number of bubbles requires, required energy consumption is more
It is low.
Detailed description of the invention:
Detailed description will be given by the following detailed implementation and drawings by the present invention for ease of explanation,.
Fig. 1 is schematic diagram of internal structure of the invention；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 is work flow diagram of the invention.
In figure: 1, screw；2, water inlet；3, air inlet；4, head-on collision gap；5, water outlet；6, Venturi tube；7, fixed
Bar；8, fixed disc；9, collapsible tube；10, trunnion；11, diffuser.
Specific embodiment:
As shown in Figure 1-3, present embodiment uses following technical scheme: a kind of micro-nano bubble hair of double fluid head-on collision jetting type
Generation method and device, including Venturi tube 6, there are two the settings of Venturi tube 6, and the Venturi tube 6 is set in fixed circle
On disk 8,6 upper end of Venturi tube is provided with water inlet 2, and the water inlet 2 of the Venturi tube 6 is in the circle of fixed disc 8
Heart position interts on the fixed disc 8 and is provided with several fixed links 7, is arranged with screw 1 in the fixed link 7, each described
Fixed link 7 is vertically connected with two fixed discs 8, is parallel to each other between each fixed link 7, two fixed discs 8
It is parallel to each other, collapsible tube 9 is connected with below the water inlet 2, the water inlet 2 is an entirety, the contraction with collapsible tube 9
9 end side of pipe is provided with trunnion 10, is provided with air inlet 3 in the Venturi tube 6, and the Venturi tube 6 is relative to water inlet
2 one end of mouth are provided with water outlet 5, there is the gap of a spacing very little, the contraction between 9 end of collapsible tube and trunnion 10
There is a gap between 9 outer wall of pipe and air inlet 3, head-on collision gap 4 is provided between two Venturi tubes 6.
Wherein, between the fixed disc 8 by fixed link 7 and the removable connection of screw 1, each fixed link 7 away from
From being equidistant for 8 center of fixed disc, the distance between every two adjacent described fixed link 7 is equal.
Wherein, 9 end of collapsible tube is a bit of cylinder-like structure, without straight between the collapsible tube 9 and air inlet 3
Lead in succession.
Wherein, the gap between 9 outer wall of collapsible tube and air inlet 3 annularly surrounds 9 lower end of collapsible tube.
Wherein, the gap phase between the gap between the collapsible tube 9 and trunnion 10 and 9 outer wall of collapsible tube and air inlet 3
It is logical.
Wherein, the air inlet 3 is located at outside 6 device of Venturi tube.
Wherein, diffuser 11 is connected between the water outlet 5 and trunnion 10.
Wherein, the length range in the head-on collision gap 4 is between 0.1cm-100cm.
Wherein, bubble method for generation are as follows:
1) suction pump respectively, is connected to by the water inlet 2 of two sides first, the air inlet 3 in two symmetrical Venturi tubes 6 is each
From a soft pipe is connected to, gas flowmeter can be installed on two soft pipes, detect the air inlet of two sides Venturi tube 6 respectively
Amount, and all with the device for adjusting air inflow on two soft pipes, it is ensured that the air inflow of two air inlets 3 keeps identical.
2), high pressure water flow flows through water inlet 2 and collapsible tube 9, and is tentatively mixed into 9 end cavity of collapsible tube with gas
Trunnion 10 is sufficiently mixed collision in trunnion 10, is sprayed in the form of foam stream through diffuser 11, two strands of gas liquid mixtures of ejection
Still there is very big kinetic energy, collides at collision gap 4, while obtaining more micro-nano bubbles, the expansion of micro-nano bubble
Dissipating path is become 360 ° of disc shaped plane diffusion from straight line diffusion.
3) when, using this device, which should be vertically placed in water body, the diffusingsurface for keeping micro-nano bubble initial with
Water surface keeping parallelism can according to circumstances come vertical position of the free regulating device in water body since the device is separated with pump machine
It sets, to guarantee that quantity and micro-nano final diffusion way, the suction pump of the micro-nano bubble of generation are booster pump, water pump
Lift is 30-40m, and soft pipe uses PVC material hose, and the gas flow is calculated as electronic flowmeter, the diffuser
11 diffusion angle is 5 ° -15 °, and gap 4 of clashing is apart between 0.1-100cm.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, the technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
- The micro-nano bubble method for generation of jetting type and device 1. a kind of double fluid clashes, including Venturi tube (6), which is characterized in that There are two Venturi tube (6) settings, and the Venturi tube (6) is set on fixed disc (8), the Venturi tube (6) Upper end is provided with water inlet (2), and the water inlet (2) of the Venturi tube (6) is in the center location of fixed disc (8), described Intert on fixed disc (8) and be provided with several fixed links (7), is arranged with screw (1) on the fixed link (7), it is each described solid Fixed pole (7) is vertically connected with two fixed discs (8), is parallel to each other between each fixed link (7), two fixed circles Disk (8) is parallel to each other, and is connected with collapsible tube (9) below the water inlet (2), and the water inlet (2) and collapsible tube (9) are one Whole, collapsible tube (9) the end side is provided with trunnion (10), is provided with air inlet (3), institute on the Venturi tube (6) Venturi tube (6) is stated to be provided with water outlet (5) relative to water inlet (2) one end, collapsible tube (9) end and trunnion (10) it Between have the gap of a spacing very little, have a gap, two texts between collapsible tube (9) outer wall and air inlet (3) Head-on collision gap (4) is provided between venturi (6).
- 2. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: pass through fixed link (7) and screw (1) removable connection, each fixed link (7) distance between the fixed disc (8) Fixed disc (8) center is equidistant, and the distance between every two adjacent described fixed link (7) is equal.
- 3. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: collapsible tube (9) end is a bit of cylinder-like structure, is not connected directly between the collapsible tube (9) and air inlet (3) It is logical.
- 4. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: the gap between collapsible tube (9) outer wall and air inlet (3) annularly surrounds collapsible tube (9) lower end.
- 5. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: the gap between the collapsible tube (9) and trunnion (10) is communicated with the gap between collapsible tube (9) outer wall and air inlet (3).
- 6. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: the air inlet (3) is located at outside Venturi tube (6) device.
- 7. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: diffuser (11) are connected between the water outlet (5) and trunnion (10).
- 8. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: the length range of head-on collision gap (4) is between 0.1cm-100cm.
- 9. a kind of double fluid according to claim 1 clashes, the micro-nano bubble method for generation of jetting type and device, feature exist In: its bubble method for generation are as follows:1) suction pump respectively, is connected to by the water inlet 2 of two sides first, the air inlet 3 in two symmetrical Venturi tubes 6 is each From a soft pipe is connected to, gas flowmeter can be installed on two soft pipes, detect the air inlet of two sides Venturi tube 6 respectively Amount, and all with the device for adjusting air inflow on two soft pipes, it is ensured that the air inflow of two air inlets 3 keeps identical；2), high pressure water flow flows through water inlet 2 and collapsible tube 9, and is tentatively mixed into trunnion in 9 end cavity of collapsible tube and gas 10, it is sufficiently mixed collision in trunnion 10, is sprayed in the form of foam stream through diffuser 11, two strands of gas liquid mixtures of ejection still have Very big kinetic energy collides at collision gap 4, while obtaining more micro-nano bubbles, the diffusion road of micro-nano bubble Diameter is become 360 ° of disc shaped plane diffusion from straight line diffusion；3) when, using this device, which should be vertically placed in water body, the diffusingsurface and the water surface for keeping micro-nano bubble initial Keeping parallelism can according to circumstances carry out vertical position of the free regulating device in water body, be since the device is separated with pump machine Guarantee the quantity for generating micro-nano bubble and micro-nano final diffusion way, the suction pump are booster pump, pump head For 30-40m, soft pipe uses PVC material hose, and the gas flow is calculated as electronic flowmeter, the diffuser 11 Diffusion angle is 5 ° -15 °, and gap 4 of clashing is apart between 0.1-100cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810950813.5A CN109731491A (en) | 2018-08-21 | 2018-08-21 | A kind of double-current micro-nano bubble method for generation of jetting type and device of clashing |
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| CN201810950813.5A CN109731491A (en) | 2018-08-21 | 2018-08-21 | A kind of double-current micro-nano bubble method for generation of jetting type and device of clashing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109225115A (en) * | 2018-09-17 | 2019-01-18 | 沈阳化工大学 | A kind of impact flow reactor of adjustable nozzle spacing |
| WO2020038310A1 (en) * | 2018-08-21 | 2020-02-27 | 深圳源域生态科创中心有限公司 | Dual-fluid colliding jet-type micro-nano-bubble generation device |
| CN111056610A (en) * | 2019-12-30 | 2020-04-24 | 上海交通大学 | Device and method for reinforcing contaminated acid heavy metal vulcanization by utilizing hydrogen sulfide micro-nano bubbles |
| CN113750830A (en) * | 2021-08-30 | 2021-12-07 | 扬州大学 | Method for preparing nano-bubble dispersion liquid by intensive mixing of gas phase and liquid phase |
| CN114042390A (en) * | 2021-10-28 | 2022-02-15 | 石河子大学 | Venturi suction device |
| CN117046335A (en) * | 2023-10-11 | 2023-11-14 | 青岛朗兹环保科技有限公司 | Opposite-impact micro-nano bubble generation device |
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| CN109225115A (en) * | 2018-09-17 | 2019-01-18 | 沈阳化工大学 | A kind of impact flow reactor of adjustable nozzle spacing |
| CN109225115B (en) * | 2018-09-17 | 2024-04-16 | 沈阳化工大学 | Impinging stream reactor with adjustable nozzle spacing |
| CN111056610A (en) * | 2019-12-30 | 2020-04-24 | 上海交通大学 | Device and method for reinforcing contaminated acid heavy metal vulcanization by utilizing hydrogen sulfide micro-nano bubbles |
| CN113750830A (en) * | 2021-08-30 | 2021-12-07 | 扬州大学 | Method for preparing nano-bubble dispersion liquid by intensive mixing of gas phase and liquid phase |
| CN114042390A (en) * | 2021-10-28 | 2022-02-15 | 石河子大学 | Venturi suction device |
| CN117046335A (en) * | 2023-10-11 | 2023-11-14 | 青岛朗兹环保科技有限公司 | Opposite-impact micro-nano bubble generation device |
| CN117046335B (en) * | 2023-10-11 | 2024-01-12 | 青岛朗兹环保科技有限公司 | Opposite-impact micro-nano bubble generation device |
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