Micro-nano bubble generating device with gas recycling function
By optimizing the fluid channel and gas supply structure design, and combining the gas recovery cycle of the cyclone degasser and buffer tank, the mixing efficiency and stability issues of the micro-nano bubble generator when scaling up were solved, realizing the efficient and stable generation of micro-nano bubbles and the recycling of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XI AN JIAOTONG UNIV
- Filing Date
- 2026-04-02
- Publication Date
- 2026-06-30
AI Technical Summary
When existing micro- and nano bubble generators are scaled up, the gas-liquid mixing efficiency decreases, energy consumption increases, and the size distribution and generation concentration of micro- and nano bubbles are difficult to stabilize, resulting in non-uniform dissolved gas performance and limiting their application in large-scale continuous flow systems.
A micro-nano bubble generator with gas recovery function was designed, including a water tank, a water pump, a liquid flow meter, a gas storage or generation module, a bubble generator, a cyclone degasser, and a computer. By optimizing the fluid channel geometry parameters and gas supply structure, and combining the cyclone degasser and buffer tank, the gas can be recycled and generated stably.
While maintaining the high efficiency of micro-nano bubble generation, it significantly improves the overall processing flow rate and system operation stability, achieves industrial-grade scale-up, overcomes the problems of bubble coalescence and fluid turbulence, and improves gas-liquid mixing uniformity and gas utilization.
Smart Images
Figure CN122298251A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of bubble generation technology, and in particular relates to a micro-nano bubble generator with gas recovery function. Background Technology
[0002] Microbubbles are gas dispersion systems whose bubble diameters typically range from several micrometers to hundreds of nanometers. Compared with traditional large bubbles, microbubbles have unique characteristics such as high specific surface area, high internal pressure, charged interface, high stability, and high solubility, which makes them significantly advantageous in various industrial scenarios.
[0003] For example, when micro- and nano-bubbles are applied in water treatment and environmental engineering, they can be widely used in processes such as wastewater purification, oxygen-enriched water preparation, and aquaculture. When applied in the chemical and energy fields, micro- and nano-bubbles can enhance mass transfer and save energy in processes such as water electrolysis for hydrogen production, catalytic oxidation, and coal-water slurry gasification. When applied in the biopharmaceutical and food industries, the high solubility of micro- and nano-bubbles can be used to improve the transport efficiency of oxygen or carbon dioxide in liquid media, thereby improving the cell culture environment, extending the shelf life of food, and improving drug delivery efficiency.
[0004] However, when the system containing the micro- and nano-bubble generator needs to be scaled up, it will cause a decrease in gas-liquid mixing efficiency, a significant increase in energy consumption, and difficulty in maintaining a stable size distribution and generation concentration of micro- and nano-bubbles. Furthermore, phenomena such as bubble coalescence, entrainment of larger bubbles, and local turbulence of fluid will occur, further leading to non-uniformity of dissolved gas performance, which limits the promotion and application of micro- and nano-bubble technology in large-scale continuous flow systems. Summary of the Invention
[0005] This application provides a micro / nano bubble generator with gas recovery function, which solves the problems in the prior art where the system containing the micro / nano bubble generator needs to be expanded, resulting in a decrease in gas-liquid mixing efficiency, a significant increase in energy consumption, and difficulty in maintaining a stable size distribution and generation concentration of micro / nano bubbles. Furthermore, phenomena such as bubble aggregation, entrainment of larger bubbles, and local turbulence of fluid occur, which further lead to the inhomogeneity of dissolved gas performance.
[0006] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, embodiments of this application provide a micro / nano bubble generator with gas recovery function, characterized in that the device includes: a water tank, a water pump, a liquid flow meter, a gas storage or generation module, a gas flow meter, a bubble generator, a cyclone degasser, and a computer; The water tank is connected to the bubble generator in sequence via the water pump and the liquid flow meter, so that the liquid in the water tank is mixed with the micro-nano bubbles generated by the bubble generator to obtain dissolved gas liquid; The gas storage or generation module is connected to the bubble generator via a gas flow meter, so that the gas output by the gas storage or generation module generates the micro-nano bubbles through the bubble generator; The bubble generator is connected to the cyclone degasser, which is used to separate undissolved micro-nano bubbles from the dissolved gas liquid. The computer is connected to the liquid flow meter and the gas flow meter respectively, so as to monitor the flow rates of the liquid and the gas respectively through the computer.
[0007] Optionally, the bubble generator includes: a liquid inlet, a first rectifier section, a contraction section, a throat, a support structure, a gas supply structure, an expansion section, a second rectifier section, a blunt body, a liquid outlet, and a gas inlet; The liquid inlet, the first rectifying section, the contraction section, the throat, the expansion section, the second rectifying section, and the liquid outlet are connected in sequence; The blunt body is disposed in the space corresponding to the expansion section and the second rectifier section to form the liquid outlet; The gas supply structure is disposed in the space corresponding to the throat through the support structure, the gas inlet is located on the side wall corresponding to the throat, and the gas enters the bubble generator through the gas inlet and the gas supply structure.
[0008] Optionally, the gas supply structure includes: a gas channel, an inner gas supply port, and an outer gas supply port, wherein the gas channel is connected to the inner gas supply port and the outer gas supply port respectively.
[0009] Optionally, the support structure is a cross structure, and the center of the support structure is located at the axis of the throat; The support structure is connected to the gas supply structure through a central hole.
[0010] Optionally, the cyclone degasser includes: a liquid inlet, a liquid outlet, a gas outlet, a conical separation section, a cylindrical section, and a gas collection chamber; The dissolved gas liquid enters the cylindrical section through the liquid inlet and forms a rotating flow field in the conical separation section, so that the undissolved gas in the dissolved gas liquid enters the gas collection chamber through the gas outlet and is discharged from the dissolved gas liquid through the liquid outlet.
[0011] Optionally, the device further includes: a buffer tank; The buffer tank is positioned between the gas storage or generation module and the gas flow meter to stabilize the pressure and buffer fluctuations in the gas flow rate.
[0012] Optionally, the buffer tank is connected to the gas outlet of the cyclone degasser to receive the gas separated by the cyclone degasser.
[0013] Optionally, a one-way valve is provided between the buffer tank and the bubble generator.
[0014] Optionally, the device further includes: a dissolved gas concentration analyzer; The dissolved gas concentration measuring instrument is located between the cyclone degasser and the computer, and is used to send the detected solubility of the gas in the dissolved gas liquid to the computer.
[0015] Optionally, the gas storage or generation module is a gas storage tank or a gas generator, used to supply the gas to the bubble generator.
[0016] This application provides a micro / nano bubble generator with gas recovery function, which achieves industrial-scale scaling in terms of structural design and system size. By optimizing the geometric parameters of the fluid channel and the gas supply structure, the overall processing flow rate and system operation stability are significantly improved while maintaining the high efficiency of micro / nano bubble generation. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a micro / nano bubble generator with gas recovery function proposed in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a bubble generator according to an embodiment of this application; Figure 3 This is a schematic diagram of a gas supply structure proposed in an embodiment of this application. Attached image description: 1-Water tank, 2-Water pump, 3-Liquid flow meter, 4-Gas storage or generating module, 5-Gas flow meter, 6-Bubble generator, 7-Swirl degasser, 8-Computer, 9-Buffer tank, 10-Dissolved gas concentration meter, 601-Liquid inlet, 602-First rectifier section, 603-Contraction section, 604-Throat, 605-Support structure, 606-Gas supply structure, 607-Expansion section, 608-Second rectifier section, 609-Blunt body, 610-Liquid outlet, 611-Gas inlet, 606a-Gas channel, 606b-Internal gas supply port and 606c-External gas supply port. Detailed Implementation
[0019] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known technologies, algorithms, and devices are omitted so as not to obscure the description of this application with unnecessary detail.
[0020] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “the,” “the,” and “the” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.
[0021] Microbubbles and nanobubbles are gas dispersion systems with bubble diameters typically ranging from several micrometers to hundreds of nanometers. Compared to traditional large bubbles, microbubbles and nanobubbles possess unique characteristics such as high specific surface area, high internal pressure, charged interface, high stability, and high solubility. Thanks to these properties, microbubbles and nanobubbles exhibit significant advantages in various industrial applications. In water treatment and environmental engineering, microbubbles and nanobubbles can significantly improve the dissolution efficiency of gases such as oxygen and ozone in liquids, promoting aeration, oxidation, and degradation reactions, and are widely used in processes such as wastewater purification, oxygen-enriched water preparation, and aquaculture. In the chemical and energy sectors, microbubbles and nanobubbles, with their excellent mass transfer properties, can accelerate gas-liquid reaction kinetics, such as enhancing mass transfer and saving energy in water electrolysis for hydrogen production, catalytic oxidation, and coal-water slurry gasification reactions. In the biopharmaceutical and food industries, the high solubility of microbubbles can improve the transport efficiency of oxygen or carbon dioxide in liquid media, thereby improving cell culture environments, extending food shelf life, and enhancing drug delivery efficiency.
[0022] However, the engineering scale-up of micro- and nano-bubble technology still faces significant challenges. As the system size of traditional micro- and nano-bubble generators increases, gas-liquid mixing efficiency decreases, energy consumption increases significantly, and the size distribution and concentration of micro- and nano-bubbles are difficult to maintain stably. Furthermore, phenomena such as bubble coalescence, entrainment of larger bubbles, and localized fluid turbulence further contribute to the inhomogeneity of dissolved gas properties, limiting the widespread application of micro- and nano-bubble technology in large-scale continuous flow systems.
[0023] Therefore, this application proposes a micro / nano bubble generator with gas recovery function, which achieves industrial-scale scaling in terms of structural design and system size. By optimizing the geometric parameters of the fluid channel and the gas supply structure, the overall processing flow rate and system operation stability are significantly improved while maintaining the efficient generation characteristics of micro / nano bubbles.
[0024] See Figure 1 , Figure 1 This is a schematic diagram of a micro / nano bubble generator with gas recovery function proposed in an embodiment of this application. The device may include: a water tank 1, a water pump 2, a liquid flow meter 3, a gas storage or generation module 4, a gas flow meter 5, a bubble generator 6, a cyclone degasser 7, and a computer 8.
[0025] The water tank 1 can be connected to the bubble generator 6 in sequence via the water pump 2 and the liquid flow meter 3, so that the liquid in the water tank 1 can be mixed with the micro-nano bubbles generated by the bubble generator 6 to obtain dissolved gas liquid.
[0026] Furthermore, the gas storage or generation module 4 can be connected to the bubble generator 6 via the gas flow meter 5, so that the gas output from the gas storage or generation module 4 generates micro-nano bubbles through the bubble generator 6. Correspondingly, the bubble generator 6 can be connected to the cyclone degasser 7, which is used to separate undissolved micro-nano bubbles from the dissolved gas liquid.
[0027] In addition, the computer 8 is connected to the liquid flow meter 3 and the gas flow meter 5 respectively, so as to monitor the flow rates of the liquid and the gas respectively through the computer 8.
[0028] Specifically, the water tank 1 can be connected to the outside via a pre-set solenoid valve to obtain and store the liquid (such as water) needed to dissolve micro-nano bubbles through the liquid inlet (such as one located at the top of the water tank 1). Moreover, the water tank 1 can also be provided with a liquid outlet, such as a removable filter element assembly located at the bottom of the water tank 1.
[0029] Correspondingly, the outlet of water tank 1 can be connected to the liquid inlet of water pump 2 through a pressure-resistant pipe, so that the liquid in water tank 1 can be transferred to liquid flow meter 3 through the liquid inlet of liquid flow meter 3 by water pump 2. Liquid flow meter 3 monitors the liquid flow and sends the monitoring data to computer 8 through signal output interface.
[0030] Moreover, after the liquid passes through the liquid outlet of the gas flow meter 5, it can enter the bubble generator 6 through the liquid inlet of the bubble generator 6, so that the gas generated by the gas storage or generation module 4 forms micro-nano bubbles in the bubble generator 6 and dissolves in the corresponding liquid.
[0031] Correspondingly, the gas storage or generation module 4 can control the gas to enter the gas flow meter 5 through the gas inlet according to the pre-set pressure reducing valve and check valve, thereby monitoring the gas flow rate, and then sending the monitored data to the computer 8 through the signal output interface of the gas flow meter 5.
[0032] Subsequently, the gas can be transmitted to the bubble generator 6 through the gas outlet of the gas flow meter 5, so that the gas can enter the bubble generator 6 through the gas inlet of the bubble generator 6 and be converted into micro-nano bubbles. The micro-nano bubbles then merge with the liquid in the bubble generator 6 to obtain dissolved gas liquid.
[0033] Finally, dissolved gas liquid can be transferred to the cyclone degasser 7 through the liquid outlet of the bubble generator 6 and the liquid inlet of the cyclone degasser 7, so that the dissolved gas liquid can separate the undissolved gas in the cyclone degasser 7, and the separated gas can be output to the gas storage or generation module 4 through the gas outlet of the cyclone degasser 7 to realize the recycling of gas.
[0034] Further, see Figure 2 , Figure 2 This is a schematic diagram of the structure of a bubble generator proposed in an embodiment of this application. The bubble generator 6 may include: a liquid inlet 601, a first rectifier section 602, a contraction section 603, a throat 604, a support structure 605, a gas supply structure 606, an expansion section 607, a second rectifier section 608, a blunt body 609, a liquid outlet 610, and a gas inlet 611.
[0035] The liquid inlet 601, the first rectifier section 602, the contraction section 603, the throat 604, the expansion section 607, the second rectifier section 608, and the liquid outlet 610 can be connected in sequence to form a bubble generator 6 with a closed space.
[0036] For example, the angle between the contraction section 603 and the axis of the bubble generator 6 can be from 10 degrees (°) to 30°, and the angle between the expansion section 607 and the axis of the bubble generator 6 can be from 5° to 25°.
[0037] Furthermore, the blunt body 609 can be disposed in the space corresponding to the expansion section 607 and the second rectifier section 608 to divert the dissolved gas liquid, thereby forming a liquid outlet 610.
[0038] In addition, the gas supply structure 606 can be set in the space corresponding to the throat 604 through the support structure 605, and the gas inlet 611 can be located on the side wall corresponding to the throat 604, so that gas can enter the bubble generator 6 through the gas inlet 611 and the gas supply structure 606.
[0039] Further, see Figure 3 , Figure 3 This is a schematic diagram of a gas supply structure proposed in an embodiment of this application. The gas supply structure 606 may include: a gas channel 606a, an inner gas supply hole 606b, and an outer gas supply hole 606c.
[0040] The gas channel 606a is connected to the inner gas supply port 606b and the outer gas supply port 606c respectively. After the gas enters through the gas channel 606a, it can form micro-nano bubbles through the inner gas supply port 606b and the outer gas supply port 606c, thereby outputting micro-nano bubbles into the liquid, so that the micro-nano bubbles dissolve in the liquid.
[0041] For example, the air supply structure 606 can be a double-layer structure with an inner and outer ring. The inner air supply hole 606b is located in the inner ring structure, and the outer air supply hole 606c is located in the outer ring structure. The embodiments of this application do not specifically limit the type of air supply structure 606.
[0042] Furthermore, the support structure 605 can be a cross structure, and the center of the support structure 605 can be located at the axis of the throat 604. Correspondingly, the support structure 605 can be connected to the air supply structure 606 through a central hole, that is, the center of the support structure 605 coincides with the center of the air supply structure 606.
[0043] Specifically, the throat 604 of the bubble generator 6 has a gas inlet 611 on its side wall for introducing high-pressure gas. A cross-shaped support structure 605 is located at the center of the throat 604 to support and fix the gas supply structure 606 in the form of inner and outer gas supply rings, while ensuring the stability and symmetry of the fluid channel. The cross-shaped support structure 605 has a central hole and communicates with the inner gas supply hole 606b and the outer gas supply hole 606c in the annular inner and outer double-layer gas supply structure through a gas channel 606a.
[0044] The circular inner and outer double-layer gas supply structure 606 consists of an inner ring gas channel and an outer ring gas channel arranged coaxially. The inner ring gas channel is connected to the high-speed fluid region inside the throat through several evenly distributed inner gas supply holes 606b, and the outer ring gas channel is connected to the outer shear layer region of the throat 604 through outer gas supply holes 606c, thereby realizing a double-layer uniform gas supply to the high-speed liquid flow.
[0045] Gas can enter gas channel 606a through gas inlet 611 and be injected into the throat region through inner gas supply hole 606b and outer gas supply hole 606c respectively. This allows the gas to be simultaneously mixed into the liquid in the mainstream fluid region and the shear layer, forming a gas-liquid mixing shear effect, which significantly improves the generation rate and dispersion uniformity of micro- and nano-bubbles. Compared with a single-layer gas supply structure, this dual-layer gas supply method can effectively improve the gas supply uniformity during large-scale gas-liquid mixing, prevent gas aggregation and backflow, and thus achieve stable and continuous generation of micro- and nano-bubbles under industrial-scale conditions.
[0046] For example, the air supply structure 606 in the form of a double-layered inner and outer ring can have 8 nozzles evenly distributed radially, and the diameter of the nozzles can be 0.2 to 1 mm. The embodiments of this application do not specifically limit the number and diameter of the nozzles.
[0047] It should be noted that in practical applications, the gas storage or generation module 4 can be a gas storage tank, a gas generator, or other equipment used to supply gas to the bubble generator 6. This application embodiment does not specifically limit the type of the gas storage or generation module 4.
[0048] In one alternative embodiment, the cyclone degasser 7 may include: a liquid inlet, a liquid outlet, a gas outlet, a conical separation section, a cylindrical section, and a gas collection chamber.
[0049] Specifically, the dissolved gas liquid can enter the cylindrical section at high speed through the liquid inlet, and form a rotating flow field in the conical separation section. This allows undissolved gas in the dissolved gas liquid to rise along the center to the gas outlet at the top, and then enter the gas collection chamber through the gas outlet. The dissolved gas liquid can then be discharged or returned to the water tank 1 through the liquid outlet at the bottom.
[0050] In another alternative embodiment, see Figure 1 The device may also include: a buffer tank 9.
[0051] The buffer tank 9 can be installed between the gas storage or generation module 4 and the gas flow meter 5 to stabilize the gas pressure and buffer gas flow fluctuations.
[0052] Furthermore, the buffer tank 9 can also be connected to the gas outlet of the cyclone degasser 7 to receive the gas separated by the cyclone degasser 7, so as to realize gas recovery and complete the recycling of gas.
[0053] In addition, a one-way valve can be installed between the buffer tank 9 and the bubble generator 6 to prevent liquid backflow from damaging the equipment.
[0054] It should be noted that, see Figure 1 The apparatus may also include: a dissolved gas concentration meter 10.
[0055] The dissolved gas concentration meter 10 is located between the cyclone degasser 7 and the computer 8, and is used to send the detected gas solubility in the dissolved liquid to the computer 8.
[0056] For example, the dissolved gas concentration analyzer 10 may include an electrode detection end and a signal output end. The electrode detection end of the dissolved gas concentration analyzer 10 is connected to the liquid outlet of the cyclone degasser 7 to detect the solubility of gas in the dissolved gas liquid. The detected gas solubility is then sent to the computer 3 through the signal output end of the dissolved gas concentration analyzer 10.
[0057] It should also be noted that the water pump 1, liquid flow meter 3, buffer tank 9 and bubble generator 6 can be connected by pressure-resistant stainless steel pipe or polytetrafluoroethylene hose, and the interface can be connected by flange or thread to ensure the system's sealing and corrosion resistance. This application embodiment does not specifically limit the connection method between the various devices.
[0058] The following is combined Figures 1 to 3 The usage process of the micro / nano bubble generator with gas recovery function provided in this application is described, including the following steps: Step 1: Inject the liquid to be treated into the water tank. A water pump delivers the liquid to a liquid flow meter, and the flow rate is adjusted according to set parameters to ensure a stable flow velocity and inlet pressure for the liquid entering the bubble generator. The liquid flow meter monitors the fluid flow signal in real time and transmits the data to a computer for controlling and recording system operating parameters.
[0059] Step 2: Adjust the output pressure and flow rate of the gas in the gas storage tank using a gas flow meter. After the gas flow meter is adjusted, the gas enters the buffer tank. Once the pressure in the buffer tank is stabilized and balanced, it is delivered to the annular gas supply structure at the throat of the bubble generator via a connecting pipeline.
[0060] Alternatively, the gas storage tank can be replaced by a gas generator for on-site preparation of working gases such as oxygen, hydrogen, carbon dioxide, or ozone.
[0061] Step 3: When the liquid forms a high-speed jet at the throat of the bubble generator, gas is uniformly injected into the liquid flow through the inner and outer gas supply holes of the double-layered gas supply structure. Due to the significant negative pressure and strong shearing effect generated in the throat, the gas is rapidly dispersed into a large number of micro- and nano-sized bubbles. After the high-speed gas-liquid two-phase flow mixes at the throat, it forms a gas-containing mixed liquid flow.
[0062] Step 4: The gas-containing liquid mixture flows into the cyclone degasser. Under the strong centrifugal field inside the cyclone degasser, the liquid and undissolved gas are separated. The separated undissolved gas is introduced into a buffer tank through the return gas channel for pressure regulation and reuse, realizing a closed-loop gas recovery process.
[0063] Step 5: After degassing, the dissolved gas concentration of the liquid is measured by a dissolved gas concentration meter to evaluate the gas-liquid mixing and gas dissolution effect.
[0064] Optionally, the separated dissolved gas liquid can be returned to the water tank to form a continuous circulation system, achieving the goal of long-term stable preparation of highly soluble micro-nano bubble liquid.
[0065] In summary, the micro / nano bubble generator with gas recovery function proposed in this application has achieved industrial-scale scaling in terms of structural design and system size. By optimizing the geometric parameters of the fluid channel and the gas supply structure, the overall processing flow rate and system operation stability are significantly improved while maintaining the efficient generation characteristics of micro / nano bubbles.
[0066] Furthermore, an innovative double-layered gas supply structure with inner and outer rings is designed in the throat region of the bubble generator, combined with a cross-shaped supporting hollow channel. This allows gas to be uniformly injected into the high-speed liquid flow from multiple directions. Under the action of the expansion section and the blunt body, sufficient gas-liquid shearing and mixing are achieved. This structure effectively overcomes the problems of uneven gas supply and insufficient shearing in traditional Venturi bubble generators during scale-up, making the generated bubble particle size more controllable and significantly improving the dissolution efficiency. This enables the large-scale, energy-saving, and high-performance development of micro-nano bubble generation technology.
[0067] Furthermore, this application introduces a cyclone degasser and a closed-loop gas recovery and circulation path at the back end of the gas-liquid mixing system, achieving efficient gas recovery and reuse. By setting up a connection structure between the cyclone degasser and the buffer tank, undissolved gas is separated by cyclone separation, and then its pressure and flow rate are regulated in the buffer tank before being returned to the bubble generator, realizing the recycling of gas resources. This design not only significantly improves the gas utilization rate but also avoids energy waste and resource pollution caused by the direct emission of undissolved gas. At the same time, the reuse of the recovered gas can maintain the stability and pressure balance of the gas-liquid flow within the system, further improving the mixing uniformity and dissolution performance, thereby achieving continuous and stable preparation of micro-nano bubbles and green and sustainable operation.
[0068] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0070] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0071] In the embodiments provided in this application, it should be understood that the disclosed apparatus / devices and methods can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0072] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.
[0073] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0074] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."
[0075] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0076] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A micro / nano bubble generator with gas recovery function, characterized in that, The device includes: a water tank, a water pump, a liquid flow meter, a gas storage or generation module, a gas flow meter, a bubble generator, a cyclone degasser, and a computer; The water tank is connected to the bubble generator in sequence via the water pump and the liquid flow meter, so that the liquid in the water tank is mixed with the micro-nano bubbles generated by the bubble generator to obtain dissolved gas liquid; The gas storage or generation module is connected to the bubble generator via the gas flow meter, so that the gas output by the gas storage or generation module generates the micro-nano bubbles through the bubble generator; The bubble generator is connected to the cyclone degasser, which is used to separate undissolved micro-nano bubbles from the dissolved gas liquid. The computer is connected to the liquid flow meter and the gas flow meter respectively, so as to monitor the flow rates of the liquid and the gas respectively through the computer.
2. The apparatus according to claim 1, characterized in that, The bubble generator includes: a liquid inlet, a first rectifier section, a contraction section, a throat, a support structure, a gas supply structure, an expansion section, a second rectifier section, a blunt body, a liquid outlet, and a gas inlet; The liquid inlet, the first rectifying section, the contraction section, the throat, the expansion section, the second rectifying section, and the liquid outlet are connected in sequence; The blunt body is disposed in the space corresponding to the expansion section and the second rectifier section to form the liquid outlet; The gas supply structure is disposed in the space corresponding to the throat through the support structure, the gas inlet is located on the side wall corresponding to the throat, and the gas enters the bubble generator through the gas inlet and the gas supply structure.
3. The apparatus according to claim 2, characterized in that, The gas supply structure includes a gas channel, an inner gas supply hole, and an outer gas supply hole, wherein the gas channel is connected to the inner gas supply hole and the outer gas supply hole respectively.
4. The apparatus according to claim 2, characterized in that, The support structure is a cross structure, and the center of the support structure is located at the axis of the throat. The support structure is connected to the gas supply structure through a central hole.
5. The apparatus according to claim 1, characterized in that, The cyclone degasser includes: a liquid inlet, a liquid outlet, a gas outlet, a conical separation section, a cylindrical section, and a gas collection chamber; The dissolved gas liquid enters the cylindrical section through the liquid inlet and forms a rotating flow field in the conical separation section, so that the undissolved gas in the dissolved gas liquid enters the gas collection chamber through the gas outlet and is discharged from the dissolved gas liquid through the liquid outlet.
6. The apparatus according to any one of claims 1 to 5, characterized in that, The device further includes: a buffer tank; The buffer tank is positioned between the gas storage or generation module and the gas flow meter to stabilize the pressure and buffer fluctuations in the gas flow rate.
7. The apparatus according to claim 6, characterized in that, The buffer tank is connected to the gas outlet of the cyclone degasser and is used to receive the gas separated by the cyclone degasser.
8. The apparatus according to claim 6, characterized in that, A one-way valve is provided between the buffer tank and the bubble generator.
9. The apparatus according to any one of claims 1 to 5, characterized in that, The device also includes: a dissolved gas concentration analyzer; The dissolved gas concentration measuring instrument is located between the cyclone degasser and the computer, and is used to send the detected solubility of the gas in the dissolved gas liquid to the computer.
10. The apparatus according to any one of claims 1 to 5, characterized in that, The gas storage or generation module is a gas storage tank or a gas generator, used to supply the gas to the bubble generator.