HK1172862B - Micro-bubble generator and micro-bubble generation device - Google Patents
Micro-bubble generator and micro-bubble generation device Download PDFInfo
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- HK1172862B HK1172862B HK12113630.5A HK12113630A HK1172862B HK 1172862 B HK1172862 B HK 1172862B HK 12113630 A HK12113630 A HK 12113630A HK 1172862 B HK1172862 B HK 1172862B
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Description
Technical Field
The present invention relates to a microbubble generator and a microbubble generating apparatus.
Background
In recent years, a gas-liquid mixed fluid containing microbubbles (micro-bubbles) is used in various industries as a technique for supplying various gases in water as micro-bubbles into water, including: improvement of oxygen-deficient water masses in closed water areas, activation of microorganisms for wastewater treatment, promotion of growth of plants cultivated in water, and removal of pollutants on the surfaces of the plants.
For example, in japanese patent application laid-open No. 2003-182158, a preliminary swirl portion is provided to rectify a liquid introduced from a liquid inlet into a gas-liquid swirl chamber, and a swirl flow is generated with respect to a wall surface provided with a gas inlet perpendicular to the surface on which the liquid inlet is provided. Further, the gas is introduced by the negative pressure of the swirling flow and discharged to the discharge port toward the opposite wall surface where the discharge port is provided, while the swirling flow is generated and inverted by the wall surface where the gas introduction port is provided.
In jp 2008-272719 a, a plurality of annular grooves are provided so that the gas-liquid mixture fluid introduced into the gas-liquid swirling chamber does not expand in the axial direction, and a swirling flow of the gas-liquid mixture fluid is generated with respect to a wall surface perpendicular to the surface provided with the gas-liquid mixture fluid inlet and not provided with the gas-liquid mixture fluid inlet. Further, the wall surface is inverted, and the swirling speed is increased toward the opposite wall surface where the discharge port is provided, and the wall surface is discharged toward the discharge port.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2003-182158
Patent document 2: japanese patent laid-open No. 2008-272719
Disclosure of Invention
The above-described rotary type fine bubble generating apparatus is a type that performs fine processing of bubbles, but does not efficiently generate bubbles having a particle size of the order of nanometers.
The present invention has been made in view of the above-mentioned background art, and an object of the present invention is to provide a microbubble generator or the like capable of efficiently generating bubbles having a particle diameter of the order of nanometers.
Means for solving the problems
According to the present invention, the means described in the claims is adopted to achieve the above object. The present invention will be specifically described below.
The 1 st aspect of the present invention relates to a micro-bubble generator comprising:
a swirl chamber;
a fluid introduction port connected to the swirl chamber and introducing a fluid in a tangential direction of an inner surface of the swirl chamber;
a discharge cylinder that guides the fluid in a direction substantially perpendicular to a direction in which the fluid is introduced,
the discharge tube penetrates the wall surface of the swirl chamber and protrudes into the swirl chamber.
According to this aspect, by isolating the passage of the introduced fluid, the loss of kinetic energy of the swirling flow of the fluid can be reduced, and thus a microbubble generator capable of reducing the generated microbubbles can be obtained.
The invention according to claim 2 relates to the microbubble generator according to claim 1, wherein a central axis in the swirl chamber of the discharge cylinder is provided in a direction substantially perpendicular to a direction in which the fluid is introduced.
According to this aspect, the loss of kinetic energy of the swirling flow of the fluid can be reduced by isolating the passage of the introduced fluid, and thus a microbubble generator capable of reducing the generated microbubbles can be obtained.
The 3 rd aspect of the present invention relates to the micro-bubble generator of claim 1, wherein the micro-bubble generator comprises:
a swirl chamber;
a fluid introduction port connected to the swirl chamber and introducing a fluid in a tangential direction of an inner surface of the swirl chamber;
a discharge cylinder that guides the fluid in a direction substantially perpendicular to a direction in which the fluid is introduced,
the fluid introduced from the fluid inlet is discharged from one end of the discharge tube to the other end after rotating around the discharge tube.
According to this aspect, by isolating the passage of the introduced fluid, the loss of kinetic energy of the swirling flow of the fluid can be reduced, and thus a microbubble generator capable of reducing the generated microbubbles can be obtained.
The invention according to claim 4 relates to the microbubble generator according to claim 3, wherein one end of the discharge tube is located in the vicinity of a wall surface of the swirl chamber facing a wall surface through which the discharge tube penetrates.
According to this aspect, by isolating the passage of the introduced fluid, the loss of kinetic energy of the swirling flow of the fluid can be reduced, and thus a microbubble generator capable of reducing the generated microbubbles can be obtained.
The 5 th aspect of the present invention relates to a fine bubble generating apparatus, wherein the fine bubble generating apparatus comprises:
the microbubble generator as set forth in claim 4;
and a fluid storage tank which stores the fluid containing the fine bubbles, the fluid storage tank containing the fine bubble generator.
The 6 th aspect of the present invention relates to a fine bubble generator, including:
a swirling chamber having a space in which the fluid can swirl;
a fluid inlet port for introducing a fluid in a tangential direction of an inner surface of the swirl chamber;
a discharge tube for discharging the waste water from the waste water tank,
the whirling chamber includes: a 1 st wall surface substantially perpendicular to a surface on which the fluid introduction port of the swirl chamber is provided; a 2 nd wall surface facing the 1 st wall surface,
the discharge tube penetrates the 2 nd wall surface and protrudes into the swirl chamber.
According to this aspect, by isolating the passage of the introduced fluid, the loss of kinetic energy of the swirling flow of the fluid can be reduced, and thus a microbubble generator capable of reducing the generated microbubbles can be obtained.
The 7 th aspect of the present invention relates to a fine bubble generator, characterized by comprising:
a swirling chamber having a space in which the fluid can swirl;
a fluid inlet port for introducing a fluid in a tangential direction of an inner surface of the swirl chamber;
a discharge tube for discharging the waste water from the waste water tank,
the whirling chamber is provided with: a 1 st wall surface perpendicular to a surface on which the fluid introduction port of the swirl chamber is provided; a 2 nd wall surface facing the 1 st wall surface,
the discharge tube is positioned on the basic central axis of the swirling chamber, penetrates the 2 nd wall surface, and extends to a position close to the 1 st wall surface.
According to this aspect, by isolating the passage of the introduced fluid, the loss of kinetic energy of the swirling flow of the fluid can be reduced, and thus a microbubble generator capable of generating microbubbles can be obtained.
The 8 th aspect of the present invention relates to a fine bubble generating apparatus comprising:
a microbubble generator, the microbubble generator comprising: a swirl chamber; a fluid introduction port connected to the swirl chamber and introducing a fluid in a tangential direction of an inner surface of the swirl chamber; a discharge tube for introducing a fluid in a direction substantially perpendicular to a direction in which the fluid is introduced, the discharge tube penetrating a wall surface of the swirling chamber and protruding into the swirling chamber;
a fluid storage tank which stores the fluid containing the fine bubbles by incorporating the fine bubble generator therein,
the device obtains a fluid containing fine bubbles, which is discharged vertically upward from a fluid reservoir.
The 9 th aspect of the present invention relates to a fine bubble generating apparatus comprising:
a microbubble generator, the microbubble generator comprising: a swirl chamber; a fluid introduction port connected to the swirling chamber and introducing a gas-liquid mixed fluid in a tangential direction of an inner surface of the swirling chamber; a discharge tube for guiding the gas-liquid mixed fluid in a direction substantially perpendicular to a direction in which the gas-liquid mixed fluid is introduced, the discharge tube penetrating a wall surface of the swirl chamber and protruding into the swirl chamber, the gas-liquid mixed fluid introduced from the fluid introduction port rotating around the discharge tube and then flowing from one end of the discharge tube to the other end;
a fluid storage tank which stores the fluid containing the fine bubbles by incorporating the fine bubble generator therein,
the device obtains a fluid containing fine bubbles, which is discharged vertically upward from a fluid reservoir.
The 10 th aspect of the present invention relates to a fine bubble generating apparatus comprising:
a microbubble generator, the microbubble generator comprising: a swirl chamber; a fluid introduction port connected to the swirling chamber and introducing a gas-liquid mixed fluid in a tangential direction of an inner surface of the swirling chamber; a discharge tube that guides the gas-liquid mixed fluid in a direction substantially perpendicular to a direction in which the gas-liquid mixed fluid is introduced, the discharge tube penetrating a wall surface of the swirl chamber and protruding into the swirl chamber, the gas-liquid mixed fluid introduced from the fluid introduction port rotating around the periphery of the discharge tube and then flowing from one end of the discharge tube to the other end, the gas-liquid mixed fluid being inverted by the wall surface and flowing from an open end of the discharge tube, the wall surface being a wall surface of the swirl chamber that faces the wall surface through which the discharge tube penetrates;
a fluid storage tank which stores the fluid containing the fine bubbles by incorporating the fine bubble generator therein,
the device obtains a fluid containing fine bubbles, which is discharged vertically upward from a fluid reservoir.
The 11 th aspect of the present invention relates to a fine bubble generating apparatus comprising:
a microbubble generator, the microbubble generator comprising: a cylindrical gas-liquid swirling chamber having a space in which a gas-liquid mixed fluid can swirl; a gas-liquid introduction cylinder having a gas-liquid introduction port for introducing a gas-liquid mixed fluid in a tangential direction of an inner surface of the gas-liquid swirling chamber; a 1 st wall surface perpendicular to a surface on which the gas-liquid introduction port is provided; a 2 nd wall surface facing the 1 st wall surface and located in the vicinity of the gas-liquid inlet; a gas-liquid discharge port which is located on the central axis of the cylindrical gas-liquid swirling chamber, penetrates the 2 nd wall surface, and extends to a position close to the 1 st wall surface;
a pump for supplying fluid to the micro-bubble generator;
a suction pipe connected to a suction port of the pump;
a discharge pipe connected to the discharge port of the pump and connected to the gas-liquid inlet port;
a cylindrical housing that forms a gas-liquid mixed fluid storage tank that stores the fluid containing the fine bubbles discharged from the fine bubble generator, with the fine bubble generator being housed therein;
a hemispherical 3 rd wall surface forming a top of the gas-liquid mixed fluid storage tank;
a reservoir discharge port located at the top of the central axis of the gas-liquid mixture reservoir and penetrating the 3 rd wall surface;
a hemispherical 4 th wall surface formed at the bottom of the gas-liquid mixed fluid storage tank;
a water outlet which is located at the bottom of the central axis of the gas-liquid mixed fluid storage tank and penetrates the 4 th wall surface;
a storage tank discharge pipe connected to the storage tank discharge port;
and a drain pipe connected to the drain port.
The 12 th aspect of the present invention relates to a fine bubble generating apparatus comprising:
a microbubble generator, the microbubble generator comprising: a cylindrical gas-liquid swirling chamber having a space in which a gas-liquid mixed fluid can swirl; a gas-liquid introduction cylinder having a gas-liquid introduction port for introducing a gas-liquid mixed fluid in a tangential direction of an inner surface of the gas-liquid swirling chamber; a 1 st wall surface perpendicular to a surface on which the gas-liquid introduction port is provided; a 2 nd wall surface facing the 1 st wall surface and located in the vicinity of the gas-liquid inlet; a gas-liquid discharge port which is located on the central axis of the cylindrical gas-liquid swirling chamber, penetrates the 2 nd wall surface, and extends to a position close to the 1 st wall surface;
a pump for supplying fluid to the micro-bubble generator;
a suction pipe connected to a suction port of the pump;
a discharge pipe connected to the discharge port of the pump and connected to the gas-liquid inlet port;
a gas-liquid injection port located on a negative pressure shaft formed by a swirling flow of the fluid containing the fine bubbles discharged from the fine bubble generator;
a cylindrical housing that forms a gas-liquid mixed fluid storage tank that stores the fluid containing the fine bubbles ejected from the gas-liquid ejection port, the gas-liquid mixed fluid storage tank containing the fine bubble generator;
a hemispherical 3 rd wall surface forming a top of the gas-liquid mixed fluid storage tank;
a reservoir discharge port located at the top of the central axis of the gas-liquid mixture reservoir and penetrating the 3 rd wall surface;
a hemispherical 4 th wall surface formed at the bottom of the gas-liquid mixed fluid storage tank;
a water outlet which is located at the bottom of the central axis of the gas-liquid mixed fluid storage tank and penetrates the 4 th wall surface;
a storage tank discharge pipe connected to the storage tank discharge port;
a drain pipe connected to the drain port,
the gas-liquid mixed fluid introduced from the gas-liquid inlet rotates around the gas-liquid outlet, and then flows in from the open end of the gas-liquid outlet and flows from one end to the other end of the gas-liquid outlet due to the inversion of the 1 st wall surface.
As another example, the present invention may also be directed to a fine bubble generating apparatus including:
a microbubble generator, the microbubble generator comprising: a cylindrical gas-liquid swirling chamber having a space in which a gas-liquid mixed fluid can swirl; a cylindrical casing having the gas-liquid swirling chamber; a gas-liquid introduction cylinder having a gas-liquid introduction port for introducing a gas-liquid mixed fluid in a tangential direction of an inner surface of the gas-liquid swirling chamber; a 1 st wall surface perpendicular to a surface on which the gas-liquid introduction port is provided; a 2 nd wall surface facing the 1 st wall surface and located in the vicinity of the gas-liquid inlet; a gas-liquid discharge port which is located on the central axis of the cylindrical gas-liquid swirling chamber, penetrates the 2 nd wall surface, and extends to a position close to the 1 st wall surface;
a pump for supplying fluid to the micro-bubble generator;
a suction pipe connected to a suction port of the pump;
a discharge pipe connected to the discharge port of the pump and connected to the gas-liquid inlet port;
a gas-liquid injection port located on a negative pressure shaft formed by a swirling flow of the fluid containing the fine bubbles discharged from the fine bubble generator;
a cylindrical housing that forms a gas-liquid mixed fluid storage tank that stores the fluid containing the fine bubbles ejected from the gas-liquid ejection port, the gas-liquid mixed fluid storage tank containing the fine bubble generating device;
a hemispherical 3 rd wall surface forming a top of the gas-liquid mixed fluid storage tank;
a reservoir discharge port located at the top of the central axis of the gas-liquid mixture reservoir and penetrating the 3 rd wall surface;
a hemispherical 4 th wall surface formed at the bottom of the gas-liquid mixed fluid storage tank;
a water outlet which is located at the bottom of the central axis of the gas-liquid mixed fluid storage tank and penetrates the 4 th wall surface;
a storage tank discharge pipe connected to the storage tank discharge port;
and a drain pipe connected to the drain port.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, a microbubble generator or the like capable of reducing generated microbubbles can be obtained.
Further objects, features or advantages of the present invention will become apparent from the detailed description of the embodiments of the present invention based on the drawings described later.
Drawings
FIG. 1 is an explanatory view showing the structure of a microbubble generator;
FIG. 2 is an explanatory view showing the structure of a microbubble generator;
FIG. 3 is an explanatory view showing the structure of the microbubble generator;
FIG. 4 is an explanatory view showing the structure of the rotary type microbubble generator;
FIG. 5 is a graph showing a particle size distribution of fine bubbles generated in the fine bubble generator.
Detailed Description
[ summary ]
The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a micro-bubble generator capable of efficiently generating bubbles having a particle size of nanometer with a further saving of energy, and a micro-bubble generator having the same.
For example, in the single microbubble generator 1 of the present embodiment, the gas-liquid discharge cylinder 9 having the gas-liquid discharge port 8 is provided, and the gas-liquid discharge cylinder 9 penetrates the 2 nd wall surface 7 located on the center axis of the cylindrical gas-liquid swirling chamber 3 and extends to a position close to the 1 st wall surface 6, whereby the gas-liquid mixed fluid 10 introduced from the fluid introduction port 4 is inverted by the 1 st wall surface 6 while generating the outer swirling flow 11 so as to extend along the inner surface of the cylindrical casing 2 between the gas-liquid discharge cylinder 9 and the cylindrical casing 2, and then the gas-liquid mixed fluid 10 passes through the inside of the gas-liquid discharge cylinder 9 having the gas-liquid discharge port 8 while generating the inner swirling flow 12 and is discharged from the cylindrical gas-liquid swirling chamber 3. This prevents the flows of opposite vectors from abutting, prevents the flow velocities of both the outer swirling flow 11 and the inner swirling flow 12 from decreasing, and generates the outer swirling flow 11 and the inner swirling flow 12 which are further rectified. Then, a rotational force is applied to the gas-liquid mixed fluid 10 in the gas-liquid swirling chamber 3 at a pressure lower than that of the conventional swirling type fine bubble generating apparatus with respect to the gas-liquid mixed fluid 10 introduced from the fluid inlet 4 with good efficiency, whereby a large shearing force is generated by the gas contained in the gas-liquid mixed fluid 10, and the miniaturization of bubbles is promoted.
In addition, the type of mixed gas contained in the liquid in the fluid; the type in which gas is dissolved in liquid, and the like. Examples of the liquid include water, a solvent, and gasoline. Examples of the gas include nitrogen, oxygen, carbon dioxide, ozone, ethylene, and hydrogen. Here, the case where the gas-liquid mixed fluid is introduced into the fine bubble generator will be mainly described.
Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.
[ micro-bubble generator ]
Fig. 1 shows a structure of a microbubble generator according to the present embodiment, fig. 1A shows a longitudinal sectional view, and fig. 1B shows a section taken along line a-a' shown in fig. 1.
In fig. 1, the microbubble generator 1 is constituted by: a cylindrical housing 2; a cylindrical gas-liquid swirling chamber 3 having a space in which a gas-liquid mixed fluid 10 can swirl; a fluid inlet 4 for introducing the gas-liquid mixed fluid 10 into the gas-liquid swirling chamber 3 along a tangential direction of an inner surface of the gas-liquid swirling chamber 4; a gas-liquid introduction cylinder 5, the gas-liquid introduction cylinder 5 having a fluid introduction port 4; a 1 st wall surface 6 perpendicular to a surface on which the fluid inlet 4 of the gas-liquid swirling chamber 3 is provided; a 2 nd wall surface 7 located in the vicinity of the fluid inlet 4 facing the wall surface 6; a gas-liquid discharge port 8 which is located on the central axis of the cylindrical gas-liquid swirling chamber 3, penetrates the 2 nd wall surface 7, and extends to a position close to the 1 st wall surface 6; and a gas-liquid discharge cylinder 9 having a gas-liquid discharge 8.
As shown in fig. 1, the gas-liquid discharge cylinder 9 is located inside the cylindrical gas-liquid swirling chamber 3 of the cylindrical casing 2 on the central axis of the cylindrical gas-liquid swirling chamber 3, penetrates the 2 nd wall surface 7, and extends to a position close to the 1 st wall surface 6, and the microbubble generator 1 has a double-cylinder structure by these two cylinders. The gas-liquid discharge 8 of the gas-liquid discharge cylinder 9 is provided at a position close to the 1 st wall surface 6.
The gas-liquid mixed fluid 10 introduced from the fluid inlet 4 of the microbubble generator 1 having the above-described structure flows so as to extend along the inner surface of the cylindrical casing between the gas-liquid discharge cylinder 9 positioned on the central axis of the cylindrical gas-liquid swirling chamber 3 and the cylindrical casing 2, whereby a rectified outer swirling flow 11 can be generated inside the cylindrical gas-liquid swirling chamber 3.
The outer swirling flow 11 travels along the 1 st wall surface 6 of the cylindrical gas-liquid swirling chamber 3, is inverted by the 1 st wall surface 6, and increases the swirling velocity in the gas-liquid discharge cylinder 9 having a smaller diameter than the cylindrical casing 2, thereby forming the inner swirling flow 12. The inner swirling flow 12 forms a high-speed backflow, and a negative pressure cavity 13 is formed near the center thereof by centrifugal force.
As described above, the microbubble generator 1 is provided with the gas-liquid discharge cylinder 9 having the gas-liquid discharge port 8, and the gas-liquid discharge cylinder 9 penetrates the 2 nd wall surface 7 positioned on the center axis of the cylindrical gas-liquid swirling chamber 3 and extends to a position close to the 1 st wall surface 6, whereby the gas-liquid mixed fluid 10 introduced from the fluid introduction port 4 is inverted by the 1 st wall surface 6 while generating the outer swirling flow 11 so as to extend along the inner surface of the cylindrical casing 2 between the gas-liquid discharge cylinder 9 and the cylindrical casing 2, and then the gas-liquid mixed fluid 10 is discharged from the cylindrical gas-liquid swirling chamber 3 while generating the inner swirling flow 12 inside the gas-liquid discharge cylinder 9 having the gas-liquid discharge port 8. This prevents the flows of opposite vectors from abutting, prevents the flow velocities of the outer swirling flow 11 and the inner swirling flow 12 from decreasing, and generates the outer swirling flow 11 and the inner swirling flow 12 having further flow rectification. Accordingly, the pressure of the gas-liquid mixed fluid 10 introduced from the fluid inlet 4 can be lower than that of the conventional swirl type fine bubble generating device, and by applying a swirling force to the gas-liquid mixed fluid 10 in the gas-liquid swirling chamber 3 with good efficiency, a large shearing force is generated by the gas contained in the gas-liquid mixed fluid 10, and the miniaturization of bubbles is promoted.
[ micro-bubble generating apparatus ]
FIG. 4 is an explanatory diagram showing the structure of the microbubble generator 21 provided with the microbubble generator 1 shown in FIG. 1.
In this FIG. 4, the microbubble generator 21 having the microbubble generator 1 includes the microbubble generator 1; a pump 22 for supplying the gas-liquid mixed fluid 10 to the microbubble generator 1; a suction pipe 24 connected to the suction port 23 of the pump 22; and a discharge pipe 26, the discharge pipe 26 being connected to the discharge port 25 of the pump and to the fluid inlet 4 of the microbubble generator 1, and a fluid 27 containing microbubbles being supplied through the gas-liquid discharge port 8 of the microbubble generator 1.
The gas-liquid ejector 31 includes a discharge pipe 33 connected to the gas-liquid introduction port 32; and a gas-liquid injection port 36, wherein the gas-liquid injection port 36 is located on a negative pressure shaft 35, and the negative pressure shaft 35 is formed by a swirling flow 34 of the fluid 27 containing fine bubbles discharged from the fine bubble generator 1, and can efficiently diffuse the fluid 27 containing fine bubbles supplied from the fine bubble generator 1 into a gas-liquid mixed flow storage tank.
Setting: a cylindrical housing 43 including a gas-liquid mixture flow storage tank 42, the gas-liquid mixture flow storage tank 42 containing the fine bubble generating device 21 and storing the fine bubble fluid 27 ejected from the gas-liquid ejection port 36; a hemispherical 3 rd wall surface 44 located at the top of the gas-liquid mixture flow storage tank 42; a reservoir discharge port 45 which is located at the top of the center axis of the gas-liquid mixture flow reservoir 42 and penetrates the 3 rd wall surface 44; a hemispherical 4 th wall surface 46 located at the bottom of the gas-liquid mixed flow storage tank 42; and a drain port 47 which is positioned at the bottom of the center axis of the gas-liquid mixture flow reservoir tank 42 and penetrates the 4 th wall surface, whereby the fluid 27 containing fine bubbles can be obtained from the reservoir tank drain port 45. Further, a reservoir discharge pipe connected to the reservoir discharge port 45 and a drain pipe connected to the drain port 47 may be provided.
Further, in order to generate fine bubbles in the conventional rotary fine bubble generator, it is necessary to immerse the generator directly in water, but the fine bubble generator 1 of the present embodiment is provided with the fluid reservoir tank 42 containing fine bubbles, and thus the fluid 27 containing fine bubbles can be obtained without immersing the discharge port 47 of the reservoir tank discharge pipe 46 in water.
The gas supply port may be provided in a suction pipe portion opened in a predetermined portion of the suction pipe connected to the suction port of the pump or in a housing portion of the pump. Further, a gas supply pipe connected to the gas supply port and to the gas discharge port of the gas supply pump, or a gas supply pipe connected to the gas discharge port of the gas container may be provided.
[ particle size distribution of generated microbubbles ]
FIG. 5 is a graph showing a particle size distribution of fine bubbles generated in the fine bubble generator.
As shown in FIG. 5, many fine bubbles were observed in a particle size range of 10 to 300nm, and the number thereof was one hundred million or more. In addition, when many fine bubbles are generated, the particle diameter is in the range of 50 to 150nm, further in the range of 50 to 110nm, and further in the range of 100nm or so. This data indicates that effective generation of bubbles having a particle size on the order of nanometers can be achieved by the technique of the above embodiment.
[ Material ]
As the material of the above-mentioned members such as the microbubble generator, a metal material or various plastics can be used. For example, it can be made of an alloy of iron, chromium, and nickel, stainless steel, SUS304, and SUS 316. Resin materials such as teflon (registered trademark) and polycarbonate can be prepared. Further, the microbubble generator or the like may be subjected to treatment such as teflon coating, surface coating, electrostatic coating, plating, or the like.
[ use ]
The use of the above techniques is contemplated. For example, there is a possibility that it can be used in the following fields.
As applications in the fields of food and agriculture, the method is used for inactivation of norwalk virus by microbubble generation, inactivation of virus in oyster bodies, sterilization and purification of an underwater culture solution using microbubble ozone, sterilization of a culture solution and roots by microbubble ozone generation, and agricultural use of nanobubbles. The applications in the medical field include clinical applications of microbubble ultrasound contrast agents and the like, liver disease diagnosis applications of contrast ultrasound, microbubble ultrasound contrast agents, clinical diagnoses, angiogenesis therapy utilizing destruction of microbubbles, mechanisms based on angiogenesis by ultrasound and microbubble generation, ultrasound manipulation of microbubbles, audio radiation pressure acting on microbubbles in ultrasound, capture of microbubbles by ultrasound, ultrasound capture of yeast by microbubbles, introduction of genetic factors by ultrasound and microbubbles, cavitation enhancement by ultrasound and microbubbles (contrast agents) in combination, introduction of genetic factors by ultrasound stimulation and microbubbles, applications to animal models, and skin disease treatment and skin cleansing of pets based on microbubbles. The applications as the environmental field include a mixed type environmental treatment technique using a micro-bubble method, introduction of excited oxygen micro-bubbles into a liquid phase, purification of oil-contaminated soil by generation of micro-bubbles, purification of contaminated site by entrainment of bubbles, purification of water quality, decomposition of organic matter and harmful matter in water by micro-bubbles, decomposition of chemical substances such as organic matter, decomposition of harmful matter by ozone, improvement of oxygen-poor water mass by micro-bubbles, generation of micro-bubbles in canals, application of micro-bubbles to artificial soda lakes, application of micro-bubbles to waterways, water purification and increase of dissolved oxygen concentration in lakes and rivers, oil-water separation technique of oil-water emulsification, treatment of dyeing plant drainage using a biofilter using carbon fibers and micro-bubbles, and cleaning technique using micro-bubbles, An environmental concern type cleaning technique using micro-bubbles, removal of oil contamination using micro-bubbles, a washing and drying machine that realizes water saving by injecting micro-bubble ozone, utilization of ships, a hull resistance reduction technique using micro-bubbles, and development of a ship underwater noise prediction method using bubble mechanics. The device development includes a low-power microbubble generator, a bubble jet type air lift pump (バブルジエツト: registered trademark), a combination of generation of microbubbles through holes, and a household cleaning device using microbubbles. Further, the present invention may be applied to an environmental improvement of a semi-closed water area using fine bubbles, a gas mixing generation using fine bubbles, a water treatment technique using crushing of fine bubbles, a preservative-free fish cake based on oxygen nanobubbles, and the like.
[ conclusion ]
The rotary micro-bubble generator of the present embodiment includes a cylindrical housing; a cylindrical gas-liquid swirling chamber having a space in which a gas-liquid mixed fluid can swirl; a fluid introduction port for introducing the gas-liquid mixed fluid in a tangential direction of an inner surface of the gas-liquid swirling chamber; a gas-liquid introduction cylinder having a fluid introduction port; a 1 st wall surface perpendicular to a surface on which a fluid introduction port of the gas-liquid swirling chamber is provided; a 2 nd wall surface located in the vicinity of the fluid inlet port facing the 1 st wall surface; a gas-liquid discharge port which is located on the central axis of the cylindrical gas-liquid swirling chamber, penetrates the 2 nd wall surface, and extends to a position close to the 1 st wall surface; a gas-liquid discharge cylinder having a gas-liquid discharge port.
According to the present embodiment, the gas-liquid discharge cylinder having the gas-liquid discharge port is provided so as to penetrate the 2 nd wall surface located on the center axis of the cylindrical gas-liquid swirl chamber and extend to a position close to the 1 st wall surface, whereby the gas-liquid mixed fluid introduced from the fluid introduction port flows along the 1 st wall surface while generating the swirl flow so as to extend along the inner surface of the cylindrical casing between the gas-liquid discharge cylinder and the cylindrical casing, and therefore, even if the structure for rectification is not provided on the inner wall surface of the cylindrical gas-liquid swirl chamber, the swirl flow having been rectified can be generated.
A gas-liquid discharge cylinder having a gas-liquid discharge port is provided, and the gas-liquid discharge cylinder penetrates a 2 nd wall surface located on the central axis of the cylindrical gas-liquid swirl chamber and extends to a position close to a 1 st wall surface, whereby the gas-liquid mixed fluid introduced from the fluid introduction port is inverted by the 1 st wall surface while generating a swirl flow so as to extend along the inner surface of the cylindrical casing between the gas-liquid discharge cylinder and the cylindrical casing, and then the gas-liquid mixed fluid is passed through the gas-liquid discharge cylinder having the gas-liquid discharge port while generating a swirl flow, and discharged from the cylindrical gas-liquid swirl chamber. This prevents the opposite vector flows from abutting each other, and prevents the swirling flow from being generated in the gas-liquid discharge cylinder having the gas-liquid discharge port, and the flow velocity of the gas-liquid mixed fluid passing therethrough from decreasing.
As described above, in the conventional apparatus, a mechanism for rectifying flow to generate a swirling flow is provided, and a swirling flow is generated with respect to a wall surface away from an inlet port perpendicular to a surface on which the inlet port for introducing a liquid or the like is provided, and after the swirling flow collides with the wall surface, the swirling flow is inverted, and the swirling flow is generated by reversing toward the inner side of the swirling flow flowing from the wall surface away from the inlet port toward the wall surface having the outlet port, and at the same time, the swirling flow flows toward the outlet port, and flows with opposite vectors are adjacent to each other, so that loss occurs in flow velocities of both.
Further, the above loss reduces the swirling flow velocity of the swirling flow of the fluid, and the fluid is pressurized by the pump and fed under pressure into the gas-liquid swirling chamber to generate the swirling flow.
However, according to the present embodiment, the gas-liquid discharge cylinder having the gas-liquid discharge port is provided, the gas-liquid discharge cylinder penetrates the 2 nd wall surface located on the center axis of the cylindrical gas-liquid swirling chamber and extends to a position close to the 1 st wall surface, and the mixed fluid introduced from the fluid introduction port so as to extend along the inner surface of the cylindrical casing between the gas-liquid discharge cylinder and the cylindrical casing is inverted by the 1 st wall surface while generating a swirling flow, and then the gas-liquid mixed fluid passes through the gas-liquid discharge cylinder having the gas-liquid discharge port while generating a swirling flow in the interior thereof, and is discharged from the cylindrical gas-liquid swirling chamber as a fluid containing fine bubbles. This prevents the opposite vector flows from abutting, prevents the flow velocities of both flows from decreasing, and promotes the miniaturization of the bubbles with a small energy.
Further, according to the present embodiment, by isolating the passage of the introduced fluid, the loss of the kinetic energy of the swirling flow of the fluid can be reduced, and thereby the microbubble generator capable of reducing the generated microbubbles can be obtained. Further, according to the present embodiment, by isolating the passage of the introduced fluid, the loss of the kinetic energy of the swirling flow of the fluid can be reduced, and thereby the microbubble generator capable of reducing the generated microbubbles can be obtained.
Further, by providing a fluid reservoir containing fine bubbles, fine bubbles can be generated even if not in, for example, a water tank.
[ interpretation of the claims, etc. ]
The present invention has been described above with reference to specific embodiments. However, it is apparent to those skilled in the art that modifications and substitutions can be made in the embodiments without departing from the spirit and scope of the invention. That is, the present invention is disclosed by way of examples, but the contents described in the present specification should not be construed as being limited thereto. For the purpose of judging the nature of the present invention, reference should be made to the claims recited at the outset.
It is obvious that the embodiments for describing the present invention achieve the above object, but it is understood that many modifications and other embodiments can be made by those skilled in the art. The portions or components of the embodiments used in the claims, specification, drawings and description may also be used in combination with one or more other. The claims are intended to cover such modifications and other embodiments as may be included within the scope of the present invention, which are within the technical spirit and scope of the present invention.
Industrial applicability of the invention
The above-described technique is useful for efficiently generating fine bubbles having a particle size of the order of nanometers in a fluid, and for example, the fluid containing fine bubbles supplied by a fine bubble generator including the fine bubble generator of the present invention increases the possibility of efficiently utilizing fine bubbles in a wide range of fields such as oxygen supply to an aqueous environment, medical treatment, welfare, cleaning, chemical industry, drainage treatment, biological activity, aquaculture, agriculture, and the like.
Description of reference numerals:
reference numeral 1 denotes a micro bubble generator;
reference numeral 2 denotes a housing;
reference numeral 3 denotes a gas-liquid swirl chamber;
reference numeral 4 denotes a fluid introduction port;
reference numeral 5 denotes a gas-liquid introduction cylinder;
reference numeral 6 denotes a 1 st wall surface;
reference numeral 7 denotes a 2 nd wall surface;
reference numeral 8 denotes a gas-liquid discharge port;
reference numeral 9 denotes a gas-liquid discharge cylinder;
reference numeral 10 denotes a gas-liquid mixed fluid;
reference numeral 11 denotes an outside swirling flow;
reference numeral 12 denotes an inside swirling flow;
reference numeral 13 denotes a negative pressure cavity;
reference numeral 21 denotes a fine bubble generating means;
reference numeral 22 denotes a pump;
reference numeral 23 denotes a suction port;
reference numeral 24 denotes a suction pipe;
reference numeral 25 denotes a discharge port;
reference numeral 26 denotes a discharge pipe;
reference numeral 27 denotes a fluid containing minute bubbles;
reference numeral 31 denotes a gas-liquid ejector;
reference numeral 32 denotes a gas-liquid inlet;
reference numeral 33 denotes a discharge pipe;
reference numeral 34 denotes a swirling flow;
reference numeral 35 denotes a negative pressure shaft;
reference numeral 36 denotes a gas-liquid ejection port;
reference numeral 42 denotes a gas-liquid mixed fluid storage tank;
reference numeral 43 denotes a housing;
reference numeral 44 denotes a 3 rd wall surface;
reference numeral 45 denotes a reservoir discharge port;
reference numeral 46 denotes a 4 th wall surface;
reference numeral 47 denotes a drain port.
Claims (2)
1. A micro-bubble generating device, comprising:
a microbubble generator, the microbubble generator comprising: a cylindrical gas-liquid swirling chamber having a space in which a gas-liquid mixed fluid can swirl; a gas-liquid introduction cylinder having a gas-liquid introduction port for introducing a gas-liquid mixed fluid in a tangential direction of an inner surface of the gas-liquid swirling chamber; a 1 st wall surface perpendicular to a surface on which the gas-liquid introduction port is provided; a 2 nd wall surface facing the 1 st wall surface and located in the vicinity of the gas-liquid inlet; a gas-liquid discharge port which is located on the central axis of the cylindrical gas-liquid swirling chamber, penetrates the 2 nd wall surface, and extends to a position close to the 1 st wall surface;
a pump for supplying a gas-liquid mixed fluid to the fine bubble generator;
a suction pipe connected to a suction port of the pump;
a discharge pipe connected to the discharge port of the pump and connected to the gas-liquid inlet port;
a cylindrical housing that forms a gas-liquid mixed fluid storage tank that stores the fluid containing the fine bubbles discharged from the fine bubble generator, with the fine bubble generator being housed therein;
a hemispherical 3 rd wall surface forming a top of the gas-liquid mixed fluid storage tank;
a reservoir discharge port located at the top of the central axis of the gas-liquid mixture reservoir and penetrating the 3 rd wall surface;
a hemispherical 4 th wall surface formed at the bottom of the gas-liquid mixed fluid storage tank;
a water outlet which is located at the bottom of the central axis of the gas-liquid mixed fluid storage tank and penetrates the 4 th wall surface;
a storage tank discharge pipe connected to the storage tank discharge port;
and a drain pipe connected to the drain port.
2. A micro-bubble generating device, comprising:
a microbubble generator, the microbubble generator comprising: a cylindrical gas-liquid swirling chamber having a space in which a gas-liquid mixed fluid can swirl; a gas-liquid introduction cylinder having a gas-liquid introduction port for introducing a gas-liquid mixed fluid in a tangential direction of an inner surface of the gas-liquid swirling chamber; a 1 st wall surface perpendicular to a surface on which the gas-liquid introduction port is provided; a 2 nd wall surface facing the 1 st wall surface and located in the vicinity of the gas-liquid inlet; a gas-liquid discharge port which is located on the central axis of the cylindrical gas-liquid swirling chamber, penetrates the 2 nd wall surface, and extends to a position close to the 1 st wall surface;
a pump for supplying fluid to the micro-bubble generator;
a suction pipe connected to a suction port of the pump;
a discharge pipe connected to the discharge port of the pump and connected to the gas-liquid inlet port;
a gas-liquid injection port located on a negative pressure shaft formed by a swirling flow of the fluid containing the fine bubbles discharged from the fine bubble generator;
a cylindrical housing that forms a gas-liquid mixed fluid storage tank that stores the fluid containing the fine bubbles ejected from the gas-liquid ejection port, the gas-liquid mixed fluid storage tank containing the fine bubble generator;
a hemispherical 3 rd wall surface forming a top of the gas-liquid mixed fluid storage tank;
a reservoir discharge port located at the top of the central axis of the gas-liquid mixture reservoir and penetrating the 3 rd wall surface;
a hemispherical 4 th wall surface formed at the bottom of the gas-liquid mixed fluid storage tank;
a water outlet which is located at the bottom of the central axis of the gas-liquid mixed fluid storage tank and penetrates the 4 th wall surface;
a storage tank discharge pipe connected to the storage tank discharge port;
a drain pipe connected to the drain port,
the gas-liquid mixed fluid introduced from the gas-liquid inlet rotates around the gas-liquid outlet, and then turns around the 1 st wall surface, flows in from the open end of the gas-liquid outlet, and flows from one end to the other end of the gas-liquid outlet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009243930A JP4563496B1 (en) | 2009-10-22 | 2009-10-22 | Microbubble generator |
| JP2009-243930 | 2009-10-22 | ||
| PCT/JP2010/067356 WO2011048935A1 (en) | 2009-10-22 | 2010-10-04 | Micro-bubble generator and micro-bubble generation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| HK1172862A1 HK1172862A1 (en) | 2013-05-03 |
| HK1172862B true HK1172862B (en) | 2015-07-10 |
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