CN109260973B - Microbubble generating device based on sphere shearing effect - Google Patents
Microbubble generating device based on sphere shearing effect Download PDFInfo
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- CN109260973B CN109260973B CN201811200367.2A CN201811200367A CN109260973B CN 109260973 B CN109260973 B CN 109260973B CN 201811200367 A CN201811200367 A CN 201811200367A CN 109260973 B CN109260973 B CN 109260973B
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- 230000000694 effects Effects 0.000 title claims abstract description 22
- 238000010008 shearing Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000007787 solid Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 230000008602 contraction Effects 0.000 claims abstract description 21
- 238000009792 diffusion process Methods 0.000 claims abstract description 8
- 210000005239 tubule Anatomy 0.000 claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 241000251468 Actinopterygii Species 0.000 description 5
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- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
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- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- 238000006731 degradation reaction Methods 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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- 239000010865 sewage Substances 0.000 description 1
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- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
- B01F33/831—Devices with consecutive working receptacles, e.g. with two intermeshing tools in one of the receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
- B01F33/83612—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by crushing or breaking
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention discloses a microbubble generating device based on a sphere shearing effect, which is characterized in that a water storage system is sequentially connected with a circulating pump and a bubble generating device through pipelines to form a loop; the bubble generating device comprises a front diffusion section, a rectifying section, a contraction section, a bubble generating section and a rear contraction section which are sequentially connected, and a solid ball is fixedly arranged in the bubble generating section; a circle of equidistant gaps are formed between the solid ball and the pipe wall of the bubble generation section, a T-shaped thin pipe is arranged in the vertical direction of the solid ball and penetrates through the solid ball and the pipe wall, one end of the thin pipe is an air inlet pipeline, and the other end of the thin pipe is an air inlet pipeline; the spherical center of the solid sphere horizontally faces the water inlet end and is provided with a gas-liquid mixing pipeline; and a bubble breaker is arranged at one end of the air bag breaker; the invention fully utilizes the high water flow speed shear formed when the liquid passes through the area where the solid ball and the pipe wall are close to each other and the high-strength wake turbulence generated when the solid ball wakes, and has the advantages of high bubble generation efficiency, large quantity, no pollution and energy consumption saving.
Description
Technical Field
The invention belongs to the technical field of bubble generation, and particularly relates to a micro-bubble generation device based on a sphere shearing effect.
Background
The shortage of water resources and serious pollution are one of the important problems to be solved in China at present, and the pollution of water quality not only affects the physical health of human beings, but also causes the death of a large number of fishes and aquatic animals due to the excessively low dissolved oxygen in water. The water problem is highly emphasized by the state and governments in various places, and various methods and technologies are actively adopted to protect water resources and improve the recycling property of the water resources.
Because the micro-bubbles have small size, large specific surface area and negatively charged surface, electrostatic fields with strong specific force exist around the bubbles, the bubbles can be prevented from being fused to resist the buoyancy effect, the micro-bubbles can stay in water for a long time, the physical and chemical characteristics of the micro-bubbles are different from those of the bubbles with the conventional size, the interaction and mass transfer process between gas and liquid can be effectively promoted after the micro-bubbles are fully dissolved with the liquid phase, and the micro-bubbles play an important role in water purification, fish culture and engineering application. A large amount of microbubbles are introduced into the polluted water area, so that floating algae can be removed, various water area environments can be improved and repaired, and settled micro pollutants which are difficult to degrade can be carried to float upwards, so that good living environments of fishes and aquatic animals are ensured, and the method has a good application prospect.
The generation of a large amount of micro bubbles with high efficiency is a key for solving the problems in the nature and various engineering applications. In high-intensity turbulence disturbance and high-speed water flow shearing environments, large bubbles are difficult to maintain the basic shape of the large bubbles due to small surface tension, so that the large bubbles are broken into numerous tiny bubbles. Compared with the traditional stirring kettle which forms high-strength vortex to break large bubbles, the device for forming high-speed water flow and low-pressure environment to generate micro bubbles by utilizing spherical turbulence and wall shearing is simple, high in energy utilization rate, low in operation and maintenance cost, and has good economic benefit and wide application field. At the moment of breaking the micro-bubbles in the liquid phase environment, the accumulated chemical energy is released instantaneously by the high-concentration ions accumulated on the interface due to the intense change of the disappearance of the gas-liquid interface, and a large amount of hydroxyl free radicals can be excited to be generated at the moment. The hydroxyl radical has ultrahigh oxidation-reduction potential, and the super-strong oxidation effect generated by the hydroxyl radical can degrade pollutants which are difficult to eliminate under normal conditions in water, so that the purification effect on water quality is realized. Meanwhile, the dissolution of a large number of microbubbles can obviously improve the dissolved oxygen in rivers, lakes, reservoirs and oceans, promote the growth of aerobic organisms in water, accelerate the degradation of deposited garbage in water, and reduce the death of fishes and animals in water caused by the too low dissolved oxygen.
Disclosure of Invention
According to the defects and the shortcomings of the prior art, the invention provides a microbubble generating device based on a sphere shearing effect, which aims to generate a large amount of microbubbles efficiently and improve the sewage purifying effect and the fish culture quality of the microbubbles.
The micro-bubble generating device based on the sphere shearing effect comprises a circulating pump, a bubble generating device and a pipeline, wherein a water storage system is sequentially connected with the circulating pump and the bubble generating device through the pipeline to form a loop; the bubble generation device comprises a front diffusion section, a rectifying section, a contraction section, a bubble generation section and a rear contraction section which are sequentially connected, and a solid ball is fixedly arranged in the bubble generation section; a circle of equidistant gaps are formed between the solid balls and the pipe wall of the bubble generation section; a first tubule is arranged in the vertical direction of the solid sphere, the first tubule penetrates through the solid sphere and the pipe wall, one end of the first tubule is an air inlet pipeline, and the other end of the first tubule is an air inlet pipeline; the center of the solid ball horizontally faces the water inlet end, and is provided with a second tubule, one end of the second tubule is communicated with the first tubule, and a gas-liquid mixing pipeline is arranged in the second tubule; a bubble breaker is arranged at the tail end of the other end of the second tubule; and a rectifier is arranged in the rectifying section.
Further, the bubble breakers are distributed in a transverse plate array and a longitudinal plate array, parallel channels are formed in the horizontal direction, and the cross sectional area of each channel is the same;
further, the rectifier is composed of a plurality of small pipes with uniform cross sections in parallel, and the small pipes are fixed through damping nets. The cross section of the small pipeline can be square, round or hexagonal, and the uniformity of the water flow velocity distribution of the bubble generation section can be improved through the rectifier.
Further, the gap between the solid sphere and the tube wall of the bubble generating section should be kept at 0.0675D, wherein D is the tube wall inner diameter;
further, the first tubule and the second tubule adopt copper pipes with the same diameter;
further, the bubble generating device can be also provided with a dissolved oxygen detector for monitoring bubble parameters in the water storage system;
furthermore, the bubble generating device can be matched with a stirrer for better dispersing generated micro bubbles in the water environment;
further, a flowmeter is arranged in the pipeline and is used for monitoring the flow rate of the liquid in the pipeline in real time;
the invention has the beneficial effects that:
the microbubble generating device based on the sphere shearing effect provided by the invention fully utilizes high-intensity wake turbulence generated when the liquid passes through the solid sphere and the area near the tube wall and shearing at high water flow speed and solid sphere wake flow, has high bubble generating efficiency, large quantity and no pollution, and saves energy consumption; in addition, the flow meter, the valve and the circulating pump are all mature products, and the liquid flow speed in the pipeline can be adjusted by controlling the operating frequency of the valve and the circulating pump, so that the characteristics of generated bubbles and the effect of the bubbles on the liquid in the water storage system are controlled; the whole device has simple result, convenient installation and lower operation and maintenance cost.
The generation quantity of bubbles can be realized by increasing the ventilation flow, and the size of micro bubbles can be controlled by adjusting the water flow speed of the main pipeline. The whole device is simple to operate and easy to process, and meanwhile, the dissolved oxygen amount in the liquid can be monitored in the water storage system.
Drawings
FIG. 1 is a schematic view of the overall structure of the device of the present invention;
FIG. 2 is a schematic view of a bubble generating apparatus of the present invention;
FIG. 3 is a cross-sectional view of a bubble generating section of the present invention;
FIG. 4 is a schematic diagram of the operation of the bubble generating section of the present invention;
FIG. 5 is a cross-sectional view of a bubble breaker of the present invention;
FIG. 6 is a cross-sectional view of a rectifier of the present invention;
in the figure, 1, a circulating pump, 2, a front diffusion section, 3, a rectifying section, 4, a contraction section, 5, a valve A,6, an air inlet pipe, 7, an air inlet pipe, 8, a pipe wall, 9, a bubble generation section, 10, a rear contraction section, 11, a flowmeter, 12, a valve B,13, a pipe, 14, a valve C,15, micro-bubbles, 16, a dissolved oxygen monitor, 17, a stirrer, 18, a solid sphere, 19, a fixer, 20, a gas-liquid mixing pipe, 21, a bubble breaker, 22, a mother bubble, 23, a wall surface, 24, a rectifier, 25, a damping net.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a micro-bubble generating device based on sphere shearing effect is communicated with a water storage system, a circulating pump 1 and the bubble generating device through pipelines to form a loop; a valve C14 and a valve B12 are respectively arranged at a water inlet and a water outlet which are connected with the water storage system through pipelines and are used for controlling the operation of the whole device; as shown in fig. 2, the bubble generating device comprises a front diffusion section 2, a rectifying section 3, a contraction section 4, a bubble generating section 9 and a rear contraction section 10 which are sequentially connected through flanges, wherein the front diffusion section 2 is a gradual flow channel, one end of the gradual flow channel is connected with a pipeline, the other end of the gradual flow channel is connected with the rectifying section 3, smooth transition between the pipeline and the rectifying section 3 is realized, and as liquid enters the rectifying section 3 through the front diffusion section 2, the speed distribution on the axial section is uneven, as shown in fig. 6, a rectifier 24 is arranged in the rectifying section 3, the rectifier 24 is formed by a plurality of small pipelines with square, round or hexagonal cross sections in parallel, and the small pipelines are fixed through a damping net 25, so that large-scale vortexes possibly existing in the original large flow channel are divided into small-scale vortexes, the small-scale vortexes have higher attenuation speeds, the attenuation of vortexes in the water flow can be accelerated, and the smooth transition to the stability and the reduction of the turbulence degree of the downstream water flow are very favorable, so that the effects of the vortexes are reduced. The other end of the rectifying section 3 is connected with the contraction section 4, the contraction section 4 is also a gradual change pipe, the contraction section 4 is smoothly connected with the bubble generation section 9, water flow enters the bubble generation section 9 after being uniformly accelerated by the contraction section 4, and the contraction section 4 uniformly accelerates the water flow, reduces flow noise and saves energy consumption; as shown in fig. 3, the bubble generating section 9 is a uniform straight tube, a solid ball 18 is arranged in the bubble generating section 9 near the water inlet, that is, near the contraction section 4, the solid ball 18 is fixedly connected with the tube wall 8 of the bubble generating section 9 through a fixing device 19, the fixing device 19 can penetrate through the tube wall 8 by adopting bolts to be fixed with the solid ball 18, a circle of equidistant gaps are formed between the solid ball 18 and the tube wall 8 of the bubble generating section 9, and the gaps between the solid ball and the tube wall of the bubble generating section should be kept at 0.0675D, wherein D is the inner diameter of the tube wall.
As shown in fig. 4, a first tubule is arranged in the vertical direction of the solid sphere 18, the tubule penetrates through the sphere center of the solid sphere 18 and the tube wall 8 of the bubble generation section 9, one end of the first tubule is an air inlet pipeline 6, the other end of the first tubule is an air inlet pipeline 7, and valves A5 are respectively arranged on the air inlet pipeline 6 and the air inlet pipeline 7; the sphere center of the solid sphere 18 horizontally faces the water inlet end and is provided with another thin pipe II, one end of the thin pipe II is communicated with the thin pipe I, and a gas-liquid mixing pipeline 20 is arranged inside the thin pipe II; a bubble breaker 21 is arranged in the other end of the second tubule; as shown in fig. 5, the bubble breaker 21 is arranged in a transverse and longitudinal array of transverse plates, and parallel channels are formed in the horizontal direction; the other end of the bubble generation section 9 is smoothly connected with a pipeline through a gradual-change type back contraction section 10; a flowmeter 11 is also arranged on the pipeline behind the rear contraction section 10; a dissolved oxygen detector 16 and a stirrer 17 can also be arranged in the water storage system.
For a clearer explanation of the technical solution of the present invention, the following is further explained in connection with the working process of the present invention:
in the working process, firstly, the valve B12 and the valve C14 are opened, when the whole circulation loop is filled with liquid, the circulation pump 1 is started, at this time, the liquid starts to move, enters the rectifying section 3 through the gradual-change front diffusion section 2, and the large-scale vortex possibly existing in the original pipeline is divided into small-scale vortices through the rectifying section 3, so that the turbulence is reduced, stable water flow is obtained and enters the contraction section 4, and the water flow enters the bubble generation section 9 after being uniformly accelerated through the contraction section 4;
simultaneously, the valve A5 is opened, gas is introduced from the air inlet pipeline 6, water flow is introduced from the water inlet pipeline 7, the gas-liquid mixture is discharged from the gas-liquid mixing pipeline 20 towards the water inlet end, the initial size of bubbles can be smaller through the bubble breaker 21 at the tail end of the gas-liquid mixing pipeline 20, the first-stage breaking is realized, and the mother bubbles 22 are generated; under the action of water flow flowing in a pipeline, the gas-liquid mixture flows down in a concurrent way, when the gas-liquid mixture passes through a gap between the solid ball 18 and the pipe wall 8, according to the fluid dynamics principle, as the distance between the solid ball 18 and the pipe wall 8 is smaller, the speed of the liquid flow is rapidly increased when the liquid flow passes through the area, the environmental pressure at the downstream of the solid ball 18 is rapidly reduced, strong shear flow can be formed under the condition that high water flow speed is not needed, and bubbles are crushed in the second stage under the shearing action of high-speed water flow at the area where the solid ball and the pipe wall are close; the downstream back wake area of the solid sphere 18 is provided with high-intensity turbulence pulsation and vortex shearing, the third-stage crushing of bubbles is realized under the effect of the high-intensity turbulence disturbance of the wake of the solid sphere 18, the bubbles are rapidly crushed into a series of atomized state crushed bubbles when entering the area, the sizes of the bubbles reach micron-level or even nano-level at the moment, the micro-bubbles 15 are obtained, when the bubbles enter a water storage system, the bubbles are better dispersed in the water environment due to the stirring effect of the stirrer 17, and the dissolved oxygen monitor 16 is used for monitoring the parameters of the bubbles in water. The water purifying effect of the bubbles can be obtained by detecting the quality of a small amount of water extracted from the water storage system.
The above embodiments are merely for illustrating the design concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, the scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications according to the principles and design ideas of the present invention are within the scope of the present invention.
Claims (6)
1. The microbubble generating device based on the sphere shearing effect is characterized by comprising a circulating pump (1), a bubble generating device and a pipeline, wherein a water storage system is sequentially connected with the circulating pump (1) and the bubble generating device through the pipeline to form a loop; the bubble generation device comprises a front diffusion section (2), a rectifying section (3), a contraction section (4), a bubble generation section (9) and a rear contraction section (10) which are sequentially connected, and a solid ball (18) is fixedly arranged in the bubble generation section (9); a circle of equidistant gaps are formed between the solid balls (18) and the pipe wall (8) of the bubble generation section (9); a first tubule is arranged in the vertical direction of the solid sphere (18), the first tubule penetrates through the solid sphere (18) and the pipe wall (8), one end of the first tubule is an air inlet pipeline (6), and the other end of the first tubule is an air inlet pipeline (7); the sphere center of the solid sphere (18) horizontally faces the contraction section (4) and is provided with another thin pipe II, one end of the thin pipe II is communicated with the thin pipe I, the tail end of the other end of the thin pipe II is provided with a bubble breaker (21), and the inside of the thin pipe II is provided with a gas-liquid mixing pipeline; a rectifier (24) is arranged in the rectifying section (3);
the bubble breakers (21) are distributed in a transverse and longitudinal transverse plate array, parallel channels are formed in the horizontal direction, and the cross sectional area of each channel is the same;
the clearance between the solid sphere (18) and the pipe wall (8) of the bubble generation section (9) is 0.0675D, wherein D is the inner diameter of the pipe wall (8).
2. Microbubble generating device based on the shearing effect of spheres as claimed in claim 1, characterized in that said rectifier (24) consists of a number of small tubes of constant section side by side, fixed between them by damping nets (25); the cross section of the small pipeline is square, round or hexagonal, and the uniformity of the water flow velocity distribution of the bubble generation section (9) is improved through the rectifier (24).
3. The microbubble generating device based on the sphere shearing effect as set forth in claim 1, wherein the first tubule and the second tubule are copper tubes with the same diameter.
4. Microbubble generating device based on the shearing effect of spheres as claimed in claim 1, characterized in that it is equipped with an oxygen dissolution detector (16) for monitoring the parameters of the bubbles in the water storage system.
5. The microbubble generating device based on the sphere shearing effect as claimed in claim 1, characterized in that the bubble generating device is provided with a stirrer (17) in a matching way for better dispersing the generated microbubbles (15) in the water environment.
6. The microbubble generating device as defined in claim 1, further comprising a flow meter in the pipeline for real-time monitoring of the flow rate of the liquid in the pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811200367.2A CN109260973B (en) | 2018-10-16 | 2018-10-16 | Microbubble generating device based on sphere shearing effect |
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| CN201811200367.2A CN109260973B (en) | 2018-10-16 | 2018-10-16 | Microbubble generating device based on sphere shearing effect |
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| CN109260973B true CN109260973B (en) | 2024-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009274045A (en) * | 2008-05-16 | 2009-11-26 | Royal Electric Co Ltd | Micro nano-bubble generating method, and micro nano-bubble generation apparatus |
| CN202226721U (en) * | 2011-10-12 | 2012-05-23 | 山东德利环保工程有限公司 | Improved disc jet flow aerator |
| CN103342420A (en) * | 2013-06-27 | 2013-10-09 | 张力钧 | Efficient energy-saving jet aerator |
| CN104211197A (en) * | 2013-05-31 | 2014-12-17 | 无锡市兴盛环保设备有限公司 | Novel high-efficiency multi-nozzle type jet aerator |
| CN209076444U (en) * | 2018-10-16 | 2019-07-09 | 江苏大学 | A kind of micro bubble generation device based on sphere shearing effect |
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- 2018-10-16 CN CN201811200367.2A patent/CN109260973B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009274045A (en) * | 2008-05-16 | 2009-11-26 | Royal Electric Co Ltd | Micro nano-bubble generating method, and micro nano-bubble generation apparatus |
| CN202226721U (en) * | 2011-10-12 | 2012-05-23 | 山东德利环保工程有限公司 | Improved disc jet flow aerator |
| CN104211197A (en) * | 2013-05-31 | 2014-12-17 | 无锡市兴盛环保设备有限公司 | Novel high-efficiency multi-nozzle type jet aerator |
| CN103342420A (en) * | 2013-06-27 | 2013-10-09 | 张力钧 | Efficient energy-saving jet aerator |
| CN209076444U (en) * | 2018-10-16 | 2019-07-09 | 江苏大学 | A kind of micro bubble generation device based on sphere shearing effect |
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