Micro-nano bubble generating device

Abstract

The present application relates to a micro-nano bubble generating device, comprising a shell, a gas-liquid forced mixer and a pump for generating micro-nano bubbles are arranged in the shell; an inlet end and an air inlet end are connected to the input end of the pump; the output end of the pump is connected to the input end of the gas-liquid forced mixer; the output end of the gas-liquid forced mixer is connected to a liquid outlet end, a pressure stabilizing tank for stabilizing the gas-liquid ratio is arranged in the shell, the input end of the pressure stabilizing tank is connected to the pump through a pipeline, and the output end of the pressure stabilizing tank is connected to the gas-liquid forced mixer through a pipeline. By arranging the gas-liquid forced mixer in the shell, the gas-liquid forced mixer is connected to a water source and a gas source, and the gas source is one or more of air, oxygen, ozone, hydrogen, carbon monoxide, nitrogen or carbon dioxide. The gas can be accurately adjusted when entering, and nano bubbles can be generated during water treatment. The overall structure is simple, the volume is small, the processing capacity is more extensive, and the use is more convenient.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically to a micro / nano bubble generator. Background Technology

[0002] According to data from UNICEF and the World Health Organization, one-third of the world's population lacks access to safe drinking water. According to a UN report, approximately 1.5 million people die each year from contaminated drinking water. Although more than 70% of the Earth's surface is covered by water, people still have to fight for clean drinking water.

[0003] Water pollution can be defined as the pollution of streams, rivers, lakes, oceans, or any other body of water, reducing water quality and making it toxic to the environment and humans. There are two types of water pollution: one is organic pollution caused by microorganisms (bacteria and viruses) present in the water, such as feces and animal and plant waste; the other is chemical pollution caused by pesticides, human and animal drugs, household products, heavy metals, acids, and nitrates and phosphates of industrial hydrocarbons.

[0004] In many parts of the world, given the limited and concentrated processing capacity of large-scale water treatment equipment, there is a need for miniaturized water quality improvement equipment that can reduce more than 95% of organic pollutants in water. It is necessary to invent a miniaturized micro-nano bubble generator to achieve the purpose of treating water and improving water quality.

[0005] Existing miniaturized micro / nano bubble generators employing advanced oxidation processes often struggle to precisely determine gas volumes, such as the amount of ozone added. Micro / nano bubble devices require a range of precise parameters. Many commercially available microbubble devices, including those using dissolved gas pumps and centrifugal pumps for high-pressure dissolved gas, lack gas and liquid flow control and fail to meet the requirements for accurate quantity calculation. This results in poor reproducibility of most ozone microbubble advanced oxidation processes, with calculated gas dosages often differing significantly from theoretically calculated dosages. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a micro-nano bubble generator, which has the advantages of improving water quality and reducing organic pollutants in water, and solves the problems of limited and concentrated treatment capacity of traditional large-scale water treatment equipment.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a micro / nano bubble generator, comprising a housing, a door panel movably connected to the front of the housing, a top cover attached to the upper surface of the housing, a fixing mechanism between the top cover and the housing, and a gas-liquid forced mixer and a pump for generating micro / nano bubbles disposed inside the housing; the pump has an input end connected to a liquid inlet and a gas inlet; the pump's output end is connected to the input end of the gas-liquid forced mixer; and the gas-liquid forced mixer's output end is connected to a liquid outlet.

[0008] Furthermore, the housing is equipped with a pressure stabilizing tank for stabilizing the gas-liquid ratio. The input end of the pressure stabilizing tank is connected to the pump via a pipe, and the output end of the pressure stabilizing tank is connected to the gas-liquid forced mixer via a pipe.

[0009] Furthermore, the pump is one of the following: diaphragm pump, gear pump, positive displacement pump, dynamic pump, peristaltic pump, centrifugal pump, self-priming pump, or jet pump.

[0010] Furthermore, the air bubbles generated in the water at the discharge end under conditions of 0-50℃ and 0.1-0.8MPa have a volume ratio or number ratio of 50% or more and less than or equal to 10 micrometers or 72% or more and less than or equal to 50 micrometers.

[0011] Furthermore, the pump is connected to a pump power regulator to adjust the pump's output power, thereby regulating the water flow and air flow of the entire device to meet the requirements of various operating conditions. The modulation method of the pump power regulator includes, but is not limited to, one of DC PWM pulse width modulation, AC pump modulation, frequency converter modulation, and analog signal modulation.

[0012] Furthermore, a panel pressure gauge is installed on the pipeline between the gas-liquid forced mixer and the pressure stabilizing tank.

[0013] Furthermore, a solenoid valve is installed on the pipeline between the pump and the air inlet, and a gas flow meter is installed on the pipeline between the solenoid valve and the air inlet, which is far away from the pump.

[0014] Furthermore, a panel positive and negative pressure gauge is installed on the pipe between the gas flow meter and the inlet end, and a time relay is connected to the solenoid valve.

[0015] Furthermore, a first gas regulating valve is provided on the pipeline between the positive and negative pressure gauges on the panel and the air inlet, and a second gas regulating valve and a one-way valve are sequentially provided on the pipeline between the positive and negative pressure gauges on the panel and the solenoid valve.

[0016] Furthermore, the gas source at the air inlet is one of the following: air, oxygen, ozone, hydrogen, carbon monoxide, carbon dioxide, chlorine, methane, ethane, propane, ethylene, propylene, acetylene, propyne, ammonia, phosgene, nitrogen, natural gas, biogas, nitrogen oxides, hydrogen sulfide, hydrogen fluoride, sulfur dioxide, sulfur trioxide, or dimethyl sulfate, and the pressure of the gas source is 0-0.06 MPa, 0.05-1.12 MPa, 0.08-2.1 MPa, or 1.34-5 MPa.

[0017] Furthermore, the gas-liquid forced mixer is one or a combination of a conical structure, a venturi tube structure, and a cylindrical straight hole structure.

[0018] Furthermore, the gas-liquid forced mixer is made of a high-toughness metal or other high-toughness material, and its inner surface is modified to be hydrophilic or hydrophobic.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0020] 1. This micro-nano bubble generator has a gas-liquid forced mixer inside the shell. The gas-liquid forced mixer receives water and gas, and the gas source can be one of oxygen, ozone, hydrogen, carbon monoxide, nitrogen or carbon dioxide. The gas can be precisely adjusted when it enters the water. It can generate nano bubbles during water treatment. This micro-nano bubble generator has a simple overall structure and small size. Compared with traditional large water treatment equipment, it has a wider treatment capacity and is more convenient to use.

[0021] 2. This micro-nano bubble generator has a fixing mechanism and a filter on the shell. The fixing mechanism allows for quick disassembly and assembly of the top cover on the shell, while the filter allows for quick disassembly and assembly of the internal filter components, which facilitates filter maintenance and improves the service life of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a system flowchart of the present invention;

[0024] Figure 3 For the present invention Figure 1 Enlarged structural diagram at point A;

[0025] Figure 4 This is a top view schematic diagram of the connection between the top cover and the rotating shaft of the present invention;

[0026] Figure 5 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 6 For the present invention Figure 5Enlarged structural diagram at point B;

[0028] Figure 7 This is a schematic diagram of the sealing sleeve of the present invention;

[0029] Figure 8 This is a detection image of the micro-nano bubbles of the present invention.

[0030] In the diagram: 1. Housing, 2. Door panel, 301. Pressure stabilizing tank, 302. Pump, 303. Pump power regulator, 304. Panel pressure gauge, 305. Gas-liquid forced mixer, 306. Gas flow meter, 307. Panel positive and negative pressure gauges, 308. Solenoid valve, 309. Time relay, 310. First gas regulating valve, 311. Second gas regulating valve, 312. Check valve, 4. Casters, 5. Top cover, 6. Fixing mechanism, 601. Channel, 602. Bearing seat, 603. Shaft, 604. Locking block, 605. Locking slot, 606. Damping pad, 7. Liquid inlet, 8. Filter, 801. Housing, 802. Filter assembly, 803. Through hole, 804. Sealing sleeve, 805. Limiting protrusion, 806. Pull plate, 9. Air inlet, 10. Liquid outlet. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1, please refer to Figure 1 The micro / nano bubble generator in this embodiment includes a housing 1, with a door panel 2 movably connected to the front of the housing 1. The housing 1 is a rectangle with a hollow interior and an open top. Inside the housing 1 are a gas-liquid forced mixer 305 and a pump 302 for generating micro / nano bubbles. Casters 4 are fixed around the bottom of the housing 1. A top cover 5 is attached to the upper surface of the housing 1, and a fixing mechanism 6 is provided between the top cover 5 and the housing 1. The input end of the pump 302 is connected to a liquid inlet 7 and an air inlet 9, and the output end of the pump 302 is connected to the input end of the gas-liquid forced mixer 305. The output end of the forced gas-liquid mixer 305 is connected to a drain end 10, and the gas source of the inlet end 9 is one of the following: air, oxygen, ozone, hydrogen, carbon monoxide, carbon dioxide, chlorine, methane, ethane, propane, ethylene, propylene, acetylene, propyne, ammonia, phosgene, nitrogen, natural gas, biogas, nitrogen oxides, hydrogen sulfide, hydrogen fluoride, sulfur dioxide, sulfur trioxide, or dimethyl sulfate. The pressure of the gas source is 0-0.06 MPa, 0.05-1.12 MPa, 0.08-2.1 MPa, or 1.34-5 MPa.

[0033] It should be noted that nanobubble technology can provide a cost-effective, reagent-free method. For example, during the collapse of oxygen-containing nanobubbles, a large amount of reactive oxygen species are generated, including hydroxyl radicals, superoxide anion radicals, and singlet oxygen. Nanobubbles are usually generated by forming cavities in the solution. Cavitation is caused by a pressure drop below a certain critical value. According to the decompression mechanism, cavitation mechanisms can be divided into four different types. Due to the system geometry, hydrodynamic changes in liquid flow rate and pressure, acoustic cavitation generated by ultrasound acting on the liquid, particles passing through the liquid via high-intensity photons, and short-pulse optical lasers focused in solutions with low absorption coefficients, nanobubbles are usually generated using the following methods: through pressure... The gas flow in the liquid is compressed, dissolving the gas in the liquid. The mixture is then released through a nano-nozzle to form nanobubbles. Low-pressure gas is injected into the liquid and broken into bubbles by focusing, fluid oscillation, or mechanical vibration. Using the OXYDEEP-0.3 micro / nano nozzle, nanobubbles are generated by hydrodynamic cavitation. This gas-liquid circulation method generates a water tank composed of microbubbles and nanobubbles in the liquid. First, water is pumped into the nozzle at an eccentric rate to create a vortex effect. The rotating water creates a vacuum at the nozzle outlet, where the required gas is injected at a controlled rate. The gas introduced into the swirling water by the vacuum is discharged from the outlet as a mixture of microbubbles and nanobubbles.

[0034] Please see Figure 2 The micro / nano bubble generator in this embodiment includes a pressure stabilizing tank 301 fixed to the bottom wall of the inner shell 1. The input end of the pressure stabilizing tank 301 is connected to a pump 302 via a pipe. A pump power regulator 303 is connected to the pump 302. The output end of the pressure stabilizing tank 301 is connected to a gas-liquid forced mixer 305 via a pipe. The gas-liquid forced mixer 305 is one or a combination of a conical structure, a Venturi tube structure, and a cylindrical straight hole structure. The gas-liquid forced mixer 305 is made of a high-toughness metal or other high-toughness material, and its surface has been modified to be hydrophilic or hydrophobic to adapt to fluids with different surface tensions. The gas-liquid forced mixer 305 and the pressure stabilizing tank 301 are connected to the pump 302 via a pipe. A panel pressure gauge 304 is installed on the pipeline between the pressure tank 301. A solenoid valve 308 is installed on the pipeline between the pump 302 and the air inlet 9. A gas flow meter 306 is installed on the pipeline between the solenoid valve 308 and the air inlet 9, which is away from the pump 302. A panel positive and negative pressure gauge 307 is installed on the pipeline between the gas flow meter 306 and the air inlet 9. A time relay 309 is connected to the solenoid valve 308. A first gas regulating valve 310 is installed on the pipeline between the panel positive and negative pressure gauge 307 and the air inlet 9. A second gas regulating valve 311 and a one-way valve 312 are installed sequentially on the pipeline between the panel positive and negative pressure gauge 307 and the solenoid valve 308.

[0035] In addition, pump 302 is one of diaphragm pump, gear pump, positive displacement pump, dynamic pump, peristaltic pump, centrifugal pump, self-priming pump or jet pump, and the air bubbles generated in water at the discharge end 10 under the conditions of 0-50℃ and 0.1-0.8MPa are 50% or more and less than or equal to 10 micrometers in volume ratio or number ratio, or 72% or more and less than or equal to 50 micrometers.

[0036] In this embodiment, oxygen or ozone and water are introduced into the pressure stabilizing tank 301, and then sprayed out from the drain end 10 by the gas-liquid forced mixer 305, thereby generating micro-nano bubbles. During this process, the pressure and flow rate can be controlled, and the gas regulation is more precise.

[0037] Example 2, please refer to Figure 3-4 To facilitate the disassembly and assembly of the top cover 5, the fixing mechanism 6 in this embodiment includes a channel 601 formed around the top cover 5. The fixing mechanism 6 also includes a bearing seat 602 fixed around the upper surface of the housing 1. A rotating shaft 603 is fixed inside the bearing seat 602. A locking block 604 is fixed at both ends of the rotating shaft 603. The right end of the front side and the left end of the back side of the slot 605 are connected to a slot 605 formed inside the top cover 5. The slot 605 is a fan-shaped slot. The middle part of the channel 601 is cylindrical, and the two ends of the channel 601 are cuboid, allowing the rotating shaft 603 and the locking block 604 to pass through. A damping pad 606 is fixed to the inner wall of the slot 605.

[0038] The cross-section of the bottom middle part of the channel 601 is T-shaped to accommodate the bearing seat 602. The height of the rotating shaft 603 is greater than the thickness of the top cover 5, which facilitates the rotation of the rotating shaft 603, thereby driving the locking block 604 to rotate.

[0039] In this embodiment, the fixing mechanism 6 is driven by the rotating shaft 603 to rotate the card block 604, causing it to disengage from the card slot 605, so that the top cover 5 can be removed.

[0040] Example 3, please refer to Figure 5-7 A filter 8 is fixed on the inner wall of the housing 1 between the liquid inlet end 7 and the pump 302. In order to facilitate the maintenance of the filter assembly 802, the filter 8 in this embodiment includes a housing 801. The filter assembly 802 is inserted into the housing 801. A through hole 803 is opened on the upper surface of the housing 801. A sealing sleeve 804 is fixed on the inner wall of the through hole 803. The sealing sleeve 804 is an I-shaped sealing sleeve. Multiple limiting protrusions 805 are fixed on the outer surface of the sealing sleeve 804. The limiting protrusions 805 are semi-circular. Multiple semi-circular grooves are fixed on the inner wall of the sealing sleeve 804. The limiting protrusions 805 are located inside the semi-circular grooves. A pull plate 806 is fixed on the upper surface of the filter assembly 802.

[0041] Meanwhile, the filter assembly 802 includes a frame, the top of which extends through to the outside of the through hole 803. A limiting protrusion 805 is fixed to the top of the outer surface of the frame. Filter screens are fixed at both ends of the inner side of the frame. A pull plate 806 is fixed to the upper surface of the frame. The outer surface of the frame abuts against the inner wall of the outer shell 801. When water enters from the liquid inlet 7, it is initially filtered by the two layers of filter screens.

[0042] In this embodiment, the filter 8 can not only filter water, but also remove the filter assembly 802 located inside the housing 801 by pulling the pull plate 806 upward to disengage the limiting protrusion 805 from the semi-circular groove.

[0043] It is understandable that the applicability of this device is not limited to water, but can include water, sewage, water containing organic solvents, pulping black liquor, electroplating wastewater, C6-C18 olefin liquids, aromatic liquids, emulsions, alcohols, ethers, esters and one or more of the following:

[0044] Please see Figure 8 , Figure 8 This image shows the detection of micro-nanobubbles generated by the micro-nanobubble generator in this application. The Malvern Zetasize Nano ZS detector, based on the DLS laser scattering principle, has a resolution from 0.3 nm to 10 micrometers and can detect bubbles with a concentration as high as 10E9. At an ambient temperature of 30°C and an air pressure of 0.1 MPa, the micro-nanobubbles generated by the device in water initially consisted of bubbles ranging from 80 to 150 nm in size. Some of these bubbles gradually merged into micron-sized bubbles of 1-6 micrometers, while others decreased to ultra-small nanobubbles of approximately 1-10 or 20 nm. It is understandable that bubble size is related to air pressure and the type of gas. Different gases will show different measurement ranges at standard atmospheric pressure and 30°C, depending on the gas's properties and solubility.

[0045] The working principle of the above embodiments is as follows:

[0046] (1) Water enters through the inlet end 7, and is powered by the pump 302. The pump power regulator 303 controls the speed of water entry. The water enters the pressure tank 301. At the same time, oxygen and ozone enter the pump 302 through the gas flow meter 306 and the solenoid valve 308 and mix with the water. The positive and negative pressure gauges 307 and the pressure gauge 304 on the panel can observe the pressure. The gas flow meter 306 can be adjusted and controlled. By adjusting the first gas regulating valve 310 and the second gas regulating valve 311, the gas intake regulation can be made more precise. The time relay 309 can control the solenoid valve 308 to control the intake time and intake volume, and adjust and optimize the gas-liquid ratio. Then, the water in the pressure tank 301 is sprayed out through the gas-liquid forced mixer 305 and flows out from the drain end 10, realizing the generation of micro-nano bubbles for water treatment.

[0047] (2) By rotating the shaft 603, the shaft 603 drives the locking block 604 to rotate, and the locking block 604 disengages from the slot 605, so that it no longer restricts the position of the top cover 5. The top cover 5 can then be moved upward. Then, the pull plate 806 is pulled upward. Due to the elastic effect of the sealing sleeve 804, the limiting protrusion 805 moves out of the semi-circular groove, and the filter assembly 802 can be taken out from the housing 801. The inside of the housing 1 and the filter assembly 802 can be maintained, improving the service life of the device. The overall operation is relatively simple.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A micro / nano bubble generator, characterized in that, The device includes a housing (1), a door panel (2) movably connected to the front of the housing (1), a top cover (5) attached to the upper surface of the housing (1), a fixing mechanism (6) between the top cover (5) and the housing (1), and a gas-liquid forced mixer (305), a pressure stabilizing tank (301), and a pump (302) for generating micro-nano bubbles inside the housing (1); the pump (302) has an input end connected to a liquid inlet (7) and an air inlet (9); the output end of the pump (302) is connected to the input end of the gas-liquid forced mixer (305); and the output end of the gas-liquid forced mixer (305) is connected to a drain end (10). The input end of the pressure stabilizing tank (301) is connected to the pump (302), and the output end is connected to the gas-liquid forced mixer (305). A panel pressure gauge (304) is provided on the pipeline between the gas-liquid forced mixer (305) and the pressure stabilizing tank (301). A solenoid valve (308) is provided on the pipeline between the pump (302) and the air inlet (9), and a time relay (309) is connected to the solenoid valve (308). A panel positive and negative pressure gauge (307) is also provided on the pipeline between the pump (302) and the air inlet (9), and a first gas regulating valve (310) and a second gas regulating valve (311) are respectively provided on the pipeline between the panel positive and negative pressure gauge (307) and the air inlet (9) and the solenoid valve (308).

2. The micro / nano bubble generator according to claim 1, characterized in that: The pump (302) is one of the following: diaphragm pump, gear pump, positive displacement pump, dynamic pump, peristaltic pump, centrifugal pump, self-priming pump, or jet pump.

3. The micro / nano bubble generator according to claim 1, characterized in that: The air bubbles generated in the water by the drain end (10) under the conditions of 0-50℃ and 0.1-0.8MPa are 50% or more and less than or equal to 10 micrometers in volume ratio or number ratio, or 72% or more and less than or equal to 50 micrometers.

4. The micro / nano bubble generator according to claim 1, characterized in that: A pump power regulator (303) is connected to the pump (302).

5. The micro / nano bubble generator according to claim 1, characterized in that: The solenoid valve (308) is located away from the pump (302) and a gas flow meter (306) is installed on the pipe between it and the air inlet (9).

6. The micro / nano bubble generator according to claim 1, characterized in that: A one-way valve (312) is also provided on the pipeline between the positive and negative pressure gauges (307) on the panel and the solenoid valve (308).

7. The micro / nano bubble generator according to claim 1, characterized in that: The gas source of the air inlet (9) is one or more of the following: air, oxygen, ozone, hydrogen, carbon monoxide, carbon dioxide, chlorine, methane, ethane, propane, ethylene, propylene, acetylene, propyne, ammonia, phosgene, nitrogen, natural gas, biogas, nitrogen oxides, hydrogen sulfide, hydrogen fluoride, sulfur dioxide, sulfur trioxide, or dimethyl sulfate. The pressure of the gas source is 0-0.06 MPa, 0.05-1.12 MPa, 0.08-2.1 MPa, or 1.34-5 MPa.

8. The micro / nano bubble generator according to claim 1, characterized in that: The gas-liquid forced mixer (305) is one or a combination of a conical structure, a venturi tube structure, and a cylindrical straight hole structure.

9. The micro / nano bubble generator according to claim 1, characterized in that: The gas-liquid forced mixer (305) is made of high-toughness metal or other high-toughness material, and its inner surface is modified to be hydrophilic or hydrophobic.

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