CN113087291A - Ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment - Google Patents
Ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment Download PDFInfo
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- CN113087291A CN113087291A CN202110331562.4A CN202110331562A CN113087291A CN 113087291 A CN113087291 A CN 113087291A CN 202110331562 A CN202110331562 A CN 202110331562A CN 113087291 A CN113087291 A CN 113087291A
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- 238000005273 aeration Methods 0.000 title claims abstract description 50
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 20
- 230000008878 coupling Effects 0.000 title claims description 14
- 238000010168 coupling process Methods 0.000 title claims description 14
- 238000005859 coupling reaction Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000005276 aerator Methods 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 25
- 239000002101 nanobubble Substances 0.000 abstract description 11
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- 230000009471 action Effects 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
- C02F1/505—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses ship-borne microalgae in-situ treatment equipment with ultrasonic cavitation coupled micro-nano aeration, which consists of a micro-nano aeration device, an ultrasonic cavitation device and a guide cylinder assembly; the micro-nano aeration device comprises a jet aerator and an aeration pump, the ultrasonic cavitation device comprises a power supply and an ultrasonic transducer, and the guide cylinder assembly comprises a water inlet, a straight cylinder, a rotational flow fan blade and a support rod. The micro-nano aeration device continuously supplements dissolved oxygen to the water body, the water body at the water inlet end continuously flows into the guide cylinder through the formed negative pressure, micro-nano bubbles are provided for a subsequent ultrasonic area, and the cavitation effect is enhanced; the ultrasonic cavitation device can destroy the air bag structure in the microalgae, so that the microalgae can sink to the water bottom due to the loss of the buoyancy of bubbles and can not carry out photosynthesis to lose survival and reproductive capacity, and the high energy released by the collapse of the micro-nano bubbles under the action of ultrasonic waves can inactivate the algae cells. The invention has simple structure, convenient maintenance and good treatment effect, and has great advantages compared with other process equipment.
Description
Technical Field
The invention belongs to the field of lake microalgae treatment, and particularly relates to shipborne microalgae in-situ treatment equipment with ultrasonic cavitation coupled micro-nano aeration.
Background
In the production development of industry and agriculture and the daily life of human beings, a large amount of wastewater rich in nitrogen and phosphorus elements is generated, and the wastewater can cause eutrophication of water bodies after being discharged into the water bodies. The microalgae in the water body can be rapidly propagated by means of sufficient nutrient substances, so that the nutrient salts in the water are gradually exhausted until the microalgae die due to insufficient nutrition in the later period. The dead algae cells float to the water surface to form a layer of 'membrane' covering on the water surface, so that the reoxygenation process of the water body is blocked. Because the content of dissolved oxygen in water is continuously reduced, an anoxic environment is formed, and the growth of aquatic organisms is inhibited. In addition, the putrefactive decomposition of dead algae cells consumes a large amount of dissolved oxygen in water, generates toxic and harmful substances such as hydroxylamine, hydrogen sulfide and the like, and accelerates the death of aquatic organisms and the deterioration of water quality; especially in bodies of water in which aquatic organisms are cultivated, massive death of the aquatic organisms may result. In addition, microalgae produce toxic metabolites, such as algal toxins, during growth and propagation. Algal toxins not only pose a threat to the growth of aquatic organisms, but also can enter human bodies through direct introduction or the enrichment effect of food chains, and finally harm the health of human bodies.
At present, how to effectively treat microalgae becomes one of the most urgent tasks in the treatment of freshwater eutrophic water body. The ultrasonic algae removal technology has the characteristics of simple treatment process, no need of adding chemical agents, quick reaction and the like, is considered to be an efficient environment-friendly technology, and is widely researched and concerned. However, the existing ultrasonic algae removal technology mostly adopts lake covering type treatment, so that the microalgae is not thoroughly treated and is very easy to rapidly propagate and regenerate, dissolved oxygen in a water body cannot be recovered, vicious circle is easy to form, the workload of microalgae treatment is increased, and time and labor are consumed. Therefore, there is a need for structural and technological improvements to the current ultrasonic in-situ treatment device for microalgae, and a more low-consumption and high-efficiency integrated device is sought to solve the existing problems.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides ship-borne microalgae in-situ treatment equipment based on ultrasonic cavitation coupling micro-nano aeration, which solves the problems of low treatment efficiency and difficult lake ecological restoration of the existing lake microalgae by coupling based on ultrasonic cavitation and jet aeration technologies.
In order to solve the technical problems and achieve the technical effects, the invention is realized by the following technical scheme:
a ship-borne microalgae in-situ treatment device with ultrasonic cavitation coupled micro-nano aeration is composed of a ship body, a micro-nano aeration device, an ultrasonic cavitation device and a guide cylinder assembly, wherein the micro-nano aeration device, the ultrasonic cavitation device and the guide cylinder assembly are installed on the ship body; the micro-nano aeration device is used for supplementing air to a water body and forming micro-nano bubbles; the ultrasonic cavitation device is used for enabling the algae-containing water body to form a cavitation effect, and breaking the wall of microalgae cells and preliminarily oxidizing the microalgae cells; the guide cylinder assembly is used for guiding the flow, improving the gas-liquid mixing efficiency and strengthening the cavitation effect; the micro-nano aeration device comprises a jet aerator and an aeration pump, the ultrasonic cavitation device comprises a power supply and an ultrasonic transducer, and the guide cylinder assembly comprises a water inlet, a straight cylinder, a rotational flow fan blade and a support rod.
The straight cylinder is fixedly arranged on the bottom surface of the shell of the ship body through the front supporting rod and the rear supporting rod, the water inlet is connected with the front end opening of the straight cylinder, the top end of the water inlet is positioned above a water level line, the jet aerator is arranged in the water inlet and is aligned to the inside of the straight cylinder inwards, the aeration pump is arranged inside or outside the ship body, and the aeration pump is connected with the jet aerator through an air duct; the top in the straight cylinder is uniformly provided with a plurality of ultrasonic transducers, all the ultrasonic transducers form an ultrasonic region in the straight cylinder, the power supply is arranged inside or outside the ship body and is connected with each ultrasonic transducer through a lead; the cyclone fan blades are arranged at the middle section position in the straight cylinder and are arranged opposite to the jet aerator, and the cyclone fan blades obtain thrust to realize rotation through fluid entering the straight cylinder so as to improve the gas-liquid mixing effect and prolong the retention time of microalgae in the straight cylinder.
Furthermore, the jet aerator is positioned on the central axis of the straight cylinder, so that the generated micro-nano bubbles are further cavitated under the action of ultrasonic waves.
Furthermore, the flow rate of the jet aerator is 25-50L/min, different flow rates can be adjusted according to different working conditions, and under the action of jet aeration, a negative pressure can be formed in an ultrasonic area, so that fluid in the straight cylinder flows to a tail area, and a water body can still flow even when the ship body stops.
Further, the diameter of bubbles generated by the jet aerator reaches the micro-nano level.
Further, the total length of the ultrasonic area formed by all the ultrasonic transducers is 60-150 cm.
Further, the spacing distance between two adjacent ultrasonic transducers is 10-30 cm.
Furthermore, the frequency of the ultrasonic transducer is 20-80 kHz, the power of the ultrasonic transducer is 40-120W, the ultrasonic transducer can adapt to different working conditions by adjusting the power, and compared with single waves, the cluster type ultrasonic waves have a better cavitation effect.
Furthermore, the top of the water inlet is located above the water level line and is about 3-5 cm away from the water level line, so that the suspended microalgae can be effectively drained into the straight cylinder.
Further, the inner diameter of the straight cylinder is 30-60 cm.
Furthermore, the residence time of the water body in the straight cylinder is not less than 10s, and the running speed of the ship body can be adjusted according to the length of the straight cylinder and the power of the ultrasonic transducer.
Furthermore, the cyclone fan blade and the jet aerator are positioned on the same central axis, and the fluid has certain thrust on the cyclone fan blade, so that the cyclone fan blade rotates, the retention time of the microalgae in the straight cylinder is prolonged, and the gas-liquid mixing effect and the cavitation effect are improved.
Furthermore, the bracing piece is adjustable support bar, a straight section of thick bamboo passes through the bracing piece can go up and down to be fixed with adjusting the casing bottom surface of hull, a straight section of thick bamboo can be through adjusting the bracing piece changes different degree of depth and angle, reaches better aeration and water exchange effect.
The working principle of the invention is as follows:
the micro-nano aeration device supplements dissolved oxygen to the water body, provides micro-nano bubbles for a subsequent ultrasonic area, enables the water body at the water inlet end of the guide cylinder to continuously flow into the guide cylinder through formed negative pressure, and further enhances the cavitation effect through local high temperature and high pressure generated after the micro-nano bubbles are collapsed under the action of ultrasound; when the microalgae enters the guide cylinder and flows through the ultrasonic area, the ultrasonic action of the ultrasonic cavitation device can destroy the airbag structure in the microalgae, so that the microalgae sinks to the water bottom due to the loss of the buoyancy of bubbles, and the microalgae cannot be subjected to photosynthesis and loses survival and reproductive capacity; after the structure of the air bag is damaged, microalgae settle at the bottom of the water after being discharged by the guide cylinder, unconsumed micro-nano bubbles can continuously exist in the water for a long time, and can provide required dissolved oxygen for further degradation and metabolism of microorganisms, increase the activity of the dissolved oxygen and the microorganisms in the lake and be beneficial to the restoration of the ecology of the lake.
The invention has the beneficial effects that:
1. the cluster type ultrasonic cavitation method adopted by the invention has better cavitation effect and can effectively destroy the air bag structure of the microalgae cells.
2. According to the invention, the jet aerator is arranged in the water inlet area of the guide cylinder, the water body at the water inlet end of the guide cylinder continuously flows into the guide cylinder through the formed negative pressure, an additional water conservancy driving device is not needed, and the generated micro-nano bubbles are further cavitated to form a secondary cavitation effect, so that the microalgae can be removed more completely.
3. The unconsumed residual micro-nano bubbles released by the invention can exist in the water body for a long time, so that the activity of dissolved oxygen and microorganisms in the lake is increased, and the ecological restoration of the lake is facilitated.
4. The invention has simple structure, convenient maintenance, good treatment effect and higher cost and energy consumption compared with other process technologies.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a ship-mounted microalgae in-situ treatment device with ultrasonic cavitation coupled with micro-nano aeration.
The reference numbers in the figures illustrate: 1. the device comprises a water inlet, 2, a jet aerator, 3, a straight cylinder, 4, swirl fan blades, 5, an ultrasonic transducer, 6, a support rod, 7, a ship body, 8, a power supply, 9 and an aeration pump.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. The description set forth herein is intended to provide a further understanding of the invention and forms a part of this application and is intended to be an exemplification of the invention and is not intended to limit the invention to the particular embodiments illustrated.
Referring to fig. 1, the ship-borne microalgae in-situ treatment equipment with ultrasonic cavitation coupled micro-nano aeration is composed of a ship body 7, a micro-nano aeration device, an ultrasonic cavitation device and a guide cylinder assembly, wherein the micro-nano aeration device, the ultrasonic cavitation device and the guide cylinder assembly are installed on the ship body 7; the micro-nano aeration device comprises a jet aerator 2 and an aeration pump 9, and is used for supplementing air to a water body and forming micro-nano bubbles; the ultrasonic cavitation device comprises a power supply 8 and an ultrasonic transducer 5, and is used for enabling the algae-containing water body to form a cavitation effect, breaking the wall of microalgae cells and primarily oxidizing the microalgae cells; the guide cylinder assembly comprises a water inlet 1, a straight cylinder 3, cyclone fan blades 4 and a support rod 6, and is used for drainage, improving gas-liquid mixing efficiency and enhancing cavitation effect.
The straight cylinder 3 is fixedly arranged on the bottom surface of the shell of the ship body 7 through the front support rod and the rear support rod 6, the water inlet 1 is connected with the front end opening of the straight cylinder 3, the top end of the water inlet 1 is positioned above a water level line, the jet aerator 2 is arranged in the water inlet 1, the jet aerator 2 is aligned to the inside of the straight cylinder 3 inwards, the aeration pump 9 is arranged inside or outside the ship body 7, and the aeration pump 9 is connected with the jet aerator 2 through an air guide pipe; the top in the straight cylinder 3 is uniformly provided with a plurality of ultrasonic transducers 5, all the ultrasonic transducers 5 form an ultrasonic region in the straight cylinder 3, the power supply 8 is arranged inside or outside the ship body 7, and the power supply 8 is connected with each ultrasonic transducer 5 through a lead; the rotational flow fan blades 4 are installed at the middle section position in the straight cylinder 3, the rotational flow fan blades 4 are arranged opposite to the jet aerator 2, and the rotational flow fan blades 4 can rotate by obtaining thrust through fluid entering the straight cylinder 3.
As a further embodiment, the jet aerator 2 is located on the central axis of the straight cylinder 3, so that the generated micro-nano bubbles are further cavitated under the action of ultrasonic waves.
As a further embodiment, the flow rate of the jet aerator 2 is 25-50L/min, different flow rates can be adjusted according to different working conditions, and under the action of jet aeration, a negative pressure can be formed in an ultrasonic area, so that the fluid in the straight cylinder 3 flows to a terminal area, and the water body can still flow even when the ship body stops.
As a further example, the diameter of the bubbles generated by the jet aerator 2 reaches the micro-nano level.
As a further embodiment, the interval distance between two adjacent ultrasonic transducers 5 is 10-30 cm.
As a further embodiment, the total length of the ultrasonic region formed by all the ultrasonic transducers 5 is 60-150 cm.
As a further embodiment, the frequency of the ultrasonic transducer 5 is 20-80 kHz, the power is 40-120W, different powers can be adjusted to adapt to different working conditions, and compared with single waves, clustered ultrasonic waves have a better cavitation effect.
As a further embodiment, the top end of the water inlet 1 is located above the water level line and is about 3-5 cm away from the water level line, so that the suspended microalgae can be effectively guided into the straight cylinder 3.
In a further embodiment, the inner diameter of the straight cylinder 3 is 30 to 60 cm.
As a further example, the residence time of the water body in the straight cylinder 3 should not be less than 10s, and the running speed of the hull 7 can be adjusted according to the length of the straight cylinder 3 and the power of the ultrasonic transducer 5.
As a further embodiment, the swirl fan blades 4 and the jet aerator 2 are located on the same central axis, and the fluid has a certain thrust on the swirl fan blades 4, so that the swirl fan blades 4 rotate, the residence time of the microalgae in the straight cylinder 3 is prolonged, and the gas-liquid mixing effect and the cavitation effect are improved.
As a further embodiment, the supporting rod 6 is an adjustable supporting rod, the straight cylinder 3 is fixed on the bottom surface of the hull 7 through the supporting rod 6 in a lifting adjustable manner, and the straight cylinder 3 can change different depths and angles by adjusting the supporting rod 6, so as to achieve better aeration and water body exchange effects.
The following is a detailed description of a preferred embodiment of the invention:
the straight cylinder 3 is a cylindrical cylinder body, the inner diameter of the straight cylinder is 40 cm, the supporting rod 6 is fixed on the bottom surface of the shell of the ship body 7 in a height-adjustable manner, the water inlet 1 is installed at the opening at the front end of the straight cylinder 3, and the top end of the water inlet 1 is ensured to be 3 cm higher than the water outlet line.
5 ultrasonic transducers 5 with the frequency of 30 kHz and the power of 50W are uniformly arranged at the top in the straight cylinder 3, the interval distance between two adjacent ultrasonic transducers 5 is 20 cm, so that an ultrasonic area with the total length of 100 cm is formed, and the 5 ultrasonic transducers 5 are simultaneously connected with the aeration pump 9 through leads.
The jet aerator 2 is arranged at the water inlet 1, and the jet aerator 2 is ensured to be at the position of the central axis of the straight cylinder 3. The jet aerator 2 is connected with the aeration pump 9 through an air duct, and the flow rate of the jet aerator 2 is set to be 25L/min. Under the action of the jet aerator 2, negative pressure can be formed in the ultrasonic area, so that the fluid in the straight cylinder 3 flows towards the tail end opening, and the water body can still flow even when the ship body 7 stops.
The cyclone fan blade 4 is installed in the middle position in the straight cylinder 3, the cyclone fan blade 4 and the jet aerator 2 are located on the same central axis, and the fluid is right the cyclone fan blade 4 has certain thrust, so that the cyclone fan blade 4 rotates, thereby prolonging the residence time of microalgae in the straight cylinder 3 and improving the gas-liquid mixing effect and the cavitation effect.
The running speed of the ship body 7 is set to 360 m/h, and the staying time of the water body in the straight cylinder 3 is about 10 s.
The magnitude of the algae cell of the ship-borne microalgae in-situ treatment equipment set by the working parameters is 107The lake surface is treated, and after 1 hour of treatment, the magnitude of the algae cells on the lake surface can be reduced to 105And the number of algal cells decreases continuously as the algal cells settle down. The transparency of the lake water is increased along with the sedimentation of the algae cells, the value is increased from 0cm to 40 cm after 1 hour, and the treatment effect is better.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A ship-borne microalgae in-situ treatment equipment for ultrasonic cavitation coupling micro-nano aeration is characterized in that: the device comprises a ship body (7), a micro-nano aeration device, an ultrasonic cavitation device and a guide cylinder assembly, wherein the micro-nano aeration device, the ultrasonic cavitation device and the guide cylinder assembly are arranged on the ship body (7), the micro-nano aeration device comprises a jet aerator (2) and an aeration pump (9), the ultrasonic cavitation device comprises a power supply (8) and an ultrasonic transducer (5), and the guide cylinder assembly comprises a water inlet (1), a straight cylinder (3), a rotational flow fan blade (4) and a support rod (6);
the straight barrel (3) is fixedly arranged on the bottom surface of a shell of the ship body (7) through the front supporting rod and the rear supporting rod (6), the water inlet (1) is connected with the front end of the straight barrel (3) in an open mode, the top end of the water inlet (1) is positioned above a water level line, the jet aerator (2) is arranged in the water inlet (1), the jet aerator (2) is aligned to the inside of the straight barrel (3) inwards, the aeration pump (9) is arranged inside or outside the ship body (7), and the aeration pump (9) is connected with the jet aerator (2) through an air guide pipe; the top in the straight cylinder (3) is uniformly provided with a plurality of ultrasonic transducers (5), all the ultrasonic transducers (5) form an ultrasonic region in the straight cylinder (3), the power supply (8) is arranged inside or outside the ship body (7), and the power supply (8) is connected with each ultrasonic transducer (5) through a lead; the cyclone fan blades (4) are installed at the middle section position in the straight cylinder (3), the cyclone fan blades (4) and the jet aerator (2) are arranged oppositely, and the cyclone fan blades (4) obtain thrust through fluid entering the straight cylinder (3) to realize rotation so as to prolong the residence time of microalgae in the straight cylinder (3).
2. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 1, which is characterized in that: the jet aerator (2) is positioned on the central axis of the straight cylinder (3).
3. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 2, which is characterized in that: the flow rate of the jet aerator (2) is 25-50L/min.
4. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 3, which is characterized in that: the diameter of the bubbles generated by the jet aerator (2) reaches the micro-nano level.
5. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 1, which is characterized in that: the total length of the ultrasonic areas formed by all the ultrasonic transducers (5) is 60-150 cm.
6. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 5, which is characterized in that: the spacing distance between two adjacent ultrasonic transducers (5) is 10-30 cm.
7. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 6, which is characterized in that: the frequency of the ultrasonic transducer (5) is 20-80 kHz, the power is 40-120W, and the ultrasonic transducer (5) adapts to corresponding working conditions by adjusting the power.
8. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 1, which is characterized in that: the inner diameter of the straight cylinder (3) is 30-60 cm.
9. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 8, which is characterized in that: the retention time of the water body in the straight cylinder (3) is not less than 10 s.
10. The ultrasonic cavitation coupling micro-nano aeration shipborne microalgae in-situ treatment equipment according to claim 2, which is characterized in that: the rotational flow fan blades (4) and the jet aerator (2) are positioned on the same central axis.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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2021
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| CN2633880Y (en) * | 2003-09-24 | 2004-08-18 | 游穆彬 | Multifunction water purifying device |
| US20080257830A1 (en) * | 2007-04-17 | 2008-10-23 | The Research Foundation Of State University Of New York | Apparatus and method for ultrasound treatment of aquatic organisms |
| WO2017178710A1 (en) * | 2016-04-14 | 2017-10-19 | Nofa Oy | Cavitation arrangement for removing harmful substance from fluid |
| CN207483463U (en) * | 2017-11-03 | 2018-06-12 | 樊利华 | A kind of micro-nano bubble aeration oxygen-increasing generator of ultrasonic wave |
| CN208500535U (en) * | 2018-09-07 | 2019-02-15 | 大江环境股份有限公司 | The micro-nano aerator of pulling flow type for river regulation |
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