WO2020004653A1 - ファインバブル発生装置及びファインバブル発生方法 - Google Patents
ファインバブル発生装置及びファインバブル発生方法 Download PDFInfo
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- WO2020004653A1 WO2020004653A1 PCT/JP2019/025955 JP2019025955W WO2020004653A1 WO 2020004653 A1 WO2020004653 A1 WO 2020004653A1 JP 2019025955 W JP2019025955 W JP 2019025955W WO 2020004653 A1 WO2020004653 A1 WO 2020004653A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
- B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/234—Surface aerating
- B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
- B01F23/23412—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere using liquid falling from orifices in a gaseous atmosphere, the orifices being exits from perforations, tubes or chimneys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/234—Surface aerating
- B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
- B01F23/23413—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere using nozzles for projecting the liquid into the gas atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2373—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
- B01F23/23765—Nitrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
- B01F25/28—Jet mixers, i.e. mixers using high-speed fluid streams characterised by the specific design of the jet injector
- B01F25/281—Jet mixers, i.e. mixers using high-speed fluid streams characterised by the specific design of the jet injector the jet injector being of the explosive rapid expansion of supercritical solutions [RESS] or fluid injection of molecular spray [FIMS] type, i.e. the liquid is jetted in an environment (gas or liquid) by nozzles, in conditions of significant pressure drop, with the possible generation of shock waves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
- B01F25/4522—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through porous bodies, e.g. flat plates, blocks or cylinders, which obstruct the whole diameter of the tube
- B01F25/45221—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through porous bodies, e.g. flat plates, blocks or cylinders, which obstruct the whole diameter of the tube the porous bodies being cylinders or cones which obstruct the whole diameter of the tube, the flow changing from axial in radial and again in axial
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0418—Geometrical information
- B01F2215/0422—Numerical values of angles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0418—Geometrical information
- B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0436—Operational information
- B01F2215/045—Numerical flow-rate values
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0436—Operational information
- B01F2215/0481—Numerical speed values
Definitions
- the present disclosure relates to a fine bubble generation device and a fine bubble generation method for generating fine bubbles in a liquid.
- fine bubbles In recent years, the usefulness of liquids containing microbubbles called fine bubbles has attracted attention. That is, a technique related to a liquid (ie, a fine bubble liquid) in which microbubbles composed of various gases are contained in a liquid such as water has attracted attention.
- liquids containing microbubbles are used to clean various parts, such as cleaning parts and the like, disinfecting and deodorizing water, sterilizing with ozone gas, health and medical fields, water purification in lakes and farms, farms and livestock, etc.
- Applications for wastewater treatment, promotion of growth in the agricultural and fishery industries, and production of functional water such as hydrogen water are being studied.
- Patent Literature 1 discloses a technique in which a liquid is caused to flow inside a porous pipe (that is, a through hole) and a gas is supplied to the outside of the porous pipe at a high pressure to generate microbubbles in the liquid in the porous pipe. Is disclosed.
- Patent Literature 2 discloses a technique in which a porous pipe is submerged in a liquid and gas is supplied to the porous pipe at a high pressure to generate microbubbles in the liquid outside the porous pipe. .
- Patent Literatures 3 and 4 disclose techniques for miniaturizing bubbles contained in water in a preceding tank by using a porous portion made of resin or metal. This technology is a technology in which large bubbles contained in the water in the pre-stage tank are sheared (that is, the bubbles are finely cut to reduce the diameter) to form fine bubbles.
- the liquid is arranged inside the porous pipe and a high-pressure gas is supplied from the outside of the porous pipe, or the liquid is supplied to the outside of the porous pipe.
- the porous pipe supplies high-pressure gas from the inside to generate microbubbles in the liquid, but there is a problem that microbubbles cannot be generated efficiently.
- the amount of microbubbles that can be generated is smaller than the amount of gas (gas amount) mixed at a high pressure into a liquid in order to generate microbubbles.
- ⁇ ⁇ In one aspect of the present disclosure, it is desirable to provide a fine bubble generation device and a fine bubble generation method capable of efficiently generating microbubbles in a liquid.
- a fine bubble generating device relates to a fine bubble generating device that causes a liquid to pass through a porous element having a large number of pores to generate fine bubbles in the liquid.
- This fine bubble generator includes a differential pressure applying section and a bubble generating section.
- a differential pressure applying section applies a differential pressure between one side and the other side of the element.
- the liquid arranged on one side of the element is caused to pass through the other side and is ejected by the differential pressure applied by the differential pressure applying section to generate fine bubbles.
- the flow velocity when the liquid passes through the element is 0.009769 [m / s] or more.
- the bubble concentration of pure water (blank water) used in an experiment described later (that is, the bubble concentration of pure water before generation of fine bubbles) is, as can be seen from Table 8 described later, Max (maximum value). ) Is 2.98E + 06, and Ave (average value) is 1.22E + 06 [pieces / ml]. Incidentally, for example, E + 06 is to indicate 106, an index representation showing the multipliers 10 as is well known.
- the flow rate when the liquid passes through the porous element is 0.009769 [m / s] or more due to the differential pressure given by the gas.
- fine bubbles can be generated efficiently.
- a liquid having a high bubble concentration ie, a fine bubble liquid
- a liquid having a high bubble concentration can be easily produced without mixing a gas with a liquid at a high pressure as in the related art.
- the bubble concentration can be easily increased.
- fine bubbles can be efficiently generated by allowing the liquid arranged on one side of the element to pass through the other side and jetting the liquid, that is, in at least one pass.
- the flow velocity when the liquid passes through the pores of the porous element is equal to or higher than the predetermined flow rate.
- fine bubbles are efficiently generated, so that fine bubbles can be easily generated without using, for example, a conventional device equipped with a large pump or the like, that is, even with a small device.
- a differential pressure is generated using a gas supplied from a gas cylinder, a pump, a power supply, and the like can be omitted.
- Cavitation occurs locally in the pores when the liquid with a high flow velocity passes through the pores of the porous element (accordingly, within the minimum area), and rapid energy such as a change in pressure or a calorific value of the cavitation changes. It is presumed that many bubble nuclei (that is, sources of fine bubbles) are generated by the change, and many fine bubbles are generated from the bubble nuclei.
- the average pore diameter of the element may be 1.5 ⁇ m to 500 ⁇ m.
- the surface porosity of the element may be 24% to 47.7%.
- the contact angle of the liquid on the surface of the element may be 38.8 ° to 151.32 °.
- the element may be made of ceramic.
- the element is made of ceramic, impurities (so-called contamination) contained in the liquid in which fine bubbles are generated are small, which is preferable.
- impurities so-called contamination
- the amount of impurities is small. Therefore, it is preferable to use a ceramic element in such a field.
- the above-described fine bubble generator may include a first tank integrally formed with the element and a second tank that receives the liquid ejected from the element.
- a liquid containing fine bubbles can be easily produced.
- a liquid is put into a first tank, and the liquid is supplied from the first tank to one side of the element. Then, fine bubbles are generated when the liquid is ejected from the other side of the element, and the liquid containing the fine bubbles can be received in the second tank.
- a gas supply unit that supplies the first tank with a gas that provides a differential pressure in the first tank as a differential pressure applying unit, and a liquid that supplies a liquid into the first tank.
- a supply unit a gas supply unit that supplies the first tank with a gas that provides a differential pressure in the first tank as a differential pressure applying unit, and a liquid that supplies a liquid into the first tank.
- the gas supply unit is an example of a differential pressure applying unit.
- a gas for applying a differential pressure in the first tank, can be supplied to the first tank by the gas supply unit, and the liquid is supplied to the first tank by the liquid supply unit. Can be.
- the second tank may be provided with a liquid extracting section for extracting the liquid after ejection to the outside.
- the liquid after ejection can be taken out of the second tank by the liquid take-out part.
- a method for generating fine bubbles relates to a method for generating fine bubbles by causing a liquid to pass through a porous element having many pores to generate fine bubbles in the liquid. .
- this fine bubble generation method by applying a pressure difference between one side of the element and the other side, the liquid arranged on one side of the element is allowed to pass through the other side and is ejected. , Causing fine bubbles. Then, when fine bubbles are generated, the flow velocity when the liquid passes through the element is set to 0.009769 [m / s] or more.
- This fine bubble generation method has the same effect as the fine bubble generation device described above.
- a porous element refers to a porous member in which a large number of pores (that is, communication holes through which a liquid can pass) are formed.
- the element include a tubular member through which liquid can pass from the inside to the outside or from the outside to the inside, such as a tubular member having a closed end or a tubular member having both ends open.
- a film-like (for example, plate-like) member that allows liquid to pass from one side to the other side may be used.
- a material made of ceramic for example, at least one of alumina, mullite, zirconia, titania, silica, magnesia, and calcia
- various resins for example, polyethylene, polypropylene, polyethylene terephthalate, Polytetrafluoroethylene
- metals for example, aluminum, titanium, iron, gold, silver, copper, and stainless steel.
- a sintered body of 97% by weight of alumina can be adopted.
- the above-mentioned material made of ceramic is preferable.
- water for example, pure water, tap water, deionized water
- alcohol seawater
- aqueous solution for example, an aqueous solution
- cleaning liquid for example, an organic solvent, or the like
- organic solvent for example, an organic solvent, or the like
- various gases such as ambient gases are slightly dissolved in the liquid.
- Fine bubbles are bubbles having a diameter of 100 ⁇ m (10 ⁇ 4 m) or less as defined by the International Organization for Standardization (ISO), and include microbubbles having a diameter of 1 ⁇ m or more and less than 100 ⁇ m and ultrafine bubbles having a diameter of less than 1 ⁇ m.
- the gas contained in the fine bubble include various gases such as hydrogen, oxygen, carbon dioxide, and air.
- a method of adjusting a differential pressure applied to a liquid that generates fine bubbles can be mentioned.
- the flow rate can be increased by increasing the differential pressure, for example, by increasing the pressure applied to the liquid before passing through the element.
- a method of applying the differential pressure for example, a method of increasing the pressure applied to one side (the liquid side) of the element by supplying a high-pressure gas (that is, a method of increasing the atmospheric pressure) is exemplified.
- a differential pressure can be applied using a gas supplied from a gas cylinder.
- a method of reducing the pressure (atmospheric pressure or the like) applied to the other side (fine bubble generating side) of the element by evacuation or the like may be used.
- the flow velocity [m / s] is, for example, the flow rate (Q [m 3 / s]) of the liquid flowing from one side (liquid side) of the element to the other side (fine bubble generation side) and the other side of the element. It can be obtained by the calculation of Q / S from the total (S [m 2 ]) of the areas of the openings (ie, the pores) on the side surface. Note that the maximum value of the flow velocity includes 1500 m / s, which is the maximum velocity transmitted when generating ultrasonic waves in water.
- the surface porosity of the element is the ratio of the total area of the opening (porosity) of the surface on the other side of the element to the total surface area of the other side of the element (fine bubble generation side).
- FIG. 5 is a graph showing the relationship between gas consumption and bubble concentration for the fine bubble generator of the first embodiment and a conventional microporous device. It is explanatory drawing which shows the fine bubble generator of 2nd Embodiment. It is explanatory drawing which shows the fine bubble generator of 3rd Embodiment. It is explanatory drawing which shows the fine bubble generator of 4th Embodiment.
- FIG. 5 is an explanatory diagram showing names of elements and elements used in Experimental Example 1.
- 7A is a graph showing the pH of the liquid property of each sample in Experimental Example 4
- FIG. 7B is a graph showing the electric conductivity of the liquid property of each sample in Experimental Example 4
- FIG. 8A is a graph showing the TOC of the liquid property of each sample in Experimental Example 4
- FIG. 8B is a graph showing the ICP-MS of the liquid property of each sample in Experimental Example 4.
- FIG. 9A is a graph showing the particle concentration before and after freezing, which is the characteristic of the liquid of each sample in Experimental Example 5, and
- FIG. 9B is the case where the value before defoaming, which is the characteristic of the liquid in each sample in Experimental Example 5, is 100.
- 5 is a graph showing the particle concentration of the sample.
- a fine bubble generation device 1 of the first embodiment is a device that generates fine bubbles in a liquid (for example, water such as pure water), and includes a first tank 3 and a second tank 5.
- gas for example, nitrogen gas
- a liquid supply unit 11 for supplying liquid to the first tank 3
- a liquid That is, a liquid take-out section 13 for taking out a liquid in which fine bubbles are generated: a fine bubble liquid
- the first tank 3 is a container that can store a liquid, and is configured to be able to pressurize the inside. That is, it has an airtight structure in which liquid and gas do not flow out except for supply and outflow of liquid and inflow of gas, which will be described later.
- the first tank 3 is provided on its side wall 15 with a gas inlet 17 for taking in the gas supplied from the gas supply unit 9, and an upper part 19 of which is provided with a liquid supplied from the liquid supply unit 11.
- a liquid inlet 21 is provided to take in the inside. Note that, when a liquid is put into the first tank 3, the gas inlet 17 is arranged at a position above the liquid level.
- the first tank 3 is provided at its bottom 23 with a liquid supply port 25 for supplying liquid to the second tank 5 side.
- a cylindrical communication pipe 27 made of stainless steel and extending vertically downward is attached so as to communicate with the tank 5 side. The liquid in the first tank 3 is supplied to the second tank 5 through the communication pipe 27.
- a first pressure sensor 29 is disposed in the first tank 3 to detect an internal pressure (atmospheric pressure).
- the first tank 3 having the airtight structure and the gas supply unit 9 constitute a configuration for applying a differential pressure (that is, a differential pressure applying unit 10).
- the second tank 5 is a container capable of storing a liquid (that is, a fine bubble liquid), and includes a bubble generation unit 31 that generates fine bubbles therein.
- the bubble generating section 31 includes a communication pipe 27 and a porous element 33 connected to a lower end of the communication pipe 27. Therefore, the element 33 is configured integrally with the first tank 3 via the communication pipe 27.
- the element 33 is a pipe-shaped (specifically, cylindrical) member having a closed lower end (that is, a distal end).
- the upper end of the element 33 is externally fitted to the communication pipe 27, and is provided with an adhesive and a joint fitting (not shown). ), And closely adheres to the communication pipe 27 without any gap.
- the lower end side of the element 33 is closed by a bottom 35 which is a part of the element 33.
- the element 33 is mainly composed of, for example, alumina (Al 2 O 3 ) which is a ceramic (eg, 97% by weight of alumina), and the remaining 3% by weight is composed of silica (SiO 2 ), calcia (CaO), and magnesia (MgO). Etc., and a large number of pores (that is, communication holes through which liquid can pass) are formed in the entire sintered body. That is, the element 33 is a porous sintered body made of ceramic.
- the sintered body has a single-layer structure (ie, a symmetric structure) in which many pores are present in a similar state (for example, a similar average pore diameter).
- the average pore diameter of the element 33 is in the range of 1.5 ⁇ m to 500 ⁇ m, and the surface porosity of the element 33 is in the range of 24% to 47.7%.
- the contact angle of the liquid (for example, water) on the surface of the element 33 is in the range of 38.8 ° to 151.32 °.
- the second tank 5 is provided with a liquid outlet 39 for taking out the liquid from the second tank 5 to the outside at a lower portion of the side wall 37, and the liquid outlet 13 is connected to the liquid outlet 39. I have.
- a second pressure sensor 41 is disposed to detect the internal pressure (atmospheric pressure).
- the gas supply unit 9 includes a gas cylinder 43 filled with gas, a first pipe 45 connecting the gas cylinder 43 and the gas inlet 17, a first on-off valve 47 for opening and closing the flow path of the first pipe 45, a gas cylinder. And a third pressure sensor 49 for detecting a pressure in the pressure sensor 43.
- the liquid supply unit 11 includes a second pipe 51 connected to the liquid introduction port 21 to supply liquid to the first tank 3 side, and a second on-off valve 53 for opening and closing the flow path of the second pipe 51.
- a tank or the like for storing a liquid is arranged upstream of the second pipe 51, for example.
- the liquid extracting section 13 includes a third pipe 55 connected to the liquid outlet 39 for extracting liquid to the outside, and a third on-off valve 57 for opening and closing the flow path of the third pipe 55.
- the second on-off valve 53 is opened, and a predetermined amount (for example, VO [ml]) of liquid is introduced into the first tank 3 from the second pipe 51. Supply. Thereafter, the second on-off valve 53 is closed. At this time, the liquid in the first tank 3 flows through the communication pipe 27 into the element 33 (that is, flows into the inner space 59).
- a predetermined amount for example, VO [ml]
- the first on-off valve 47 is opened, and high-pressure gas is supplied from the gas cylinder 43 into the first tank 3.
- the pressure in the first tank 3 becomes higher than the atmosphere (for example, 0.4 MPa).
- the liquid in the first tank 3 is pressed by the pressure, and the liquid in the element 33 is also pressed.
- the liquid in the element 33 passes through the pores of the wall surface 61 of the element 33 and goes out of the element 3 (that is, the outer space 63 in the second tank). Injected at high speed.
- the flow velocity when the liquid passes through the element 33 is 0.009769 m / s or more, and many fine bubbles are generated when the liquid passes through the element 33 at such a high speed. That is, a fine bubble liquid containing fine bubbles is obtained.
- alumina powder having an average particle diameter of 5 ⁇ m and 3% by weight of sintering aid powder such as SiO 2 and MgO powder were prepared.
- methyl cellulose, water and a release agent were added to these solid powders to prepare a kneaded material, and a cylinder with a bottom was formed using the kneaded material.
- the formed body was fired in an air atmosphere at 1500 ° C. for 3 hours to obtain the element 33 having the above-described configuration.
- the average pore diameter can be adjusted by controlling the particle size of the raw material powder, as is well known.
- the surface porosity can be adjusted by controlling the amount of solid powder, the amount of organic matter, and the amount of water, as is well known.
- the fine bubble is formed by setting the flow velocity when the liquid passes through the porous element 33 to 0.009769 [m / s] or more by the differential pressure given by the gas. Can be generated efficiently.
- the fine bubble generator 1 (That is, in the present method), a higher gas bubble concentration can be obtained with a smaller gas consumption than in a microporous method apparatus.
- the gas consumption of this method in FIG. 2 is the consumption of gas used for pressurization.
- a liquid having a high bubble concentration ie, a fine bubble liquid
- a liquid having a high bubble concentration can be easily produced without mixing a gas with a liquid at a high pressure as in the related art.
- the bubble concentration can be easily increased.
- the liquid arranged on one side of the element 33 is allowed to pass through the other side and is ejected, that is, the fine bubbles can be efficiently generated in at least one pass. it can.
- the average pore diameter of the element 33 is in the range of 1.5 ⁇ m to 500 ⁇ m. Therefore, fine bubbles can be generated efficiently. In addition, a high bubble concentration can be realized.
- the surface porosity of the element is in the range of 24% to 47.7%. Therefore, fine bubbles can be generated efficiently. In addition, a high bubble concentration can be realized.
- the contact angle of the liquid on the surface of the element 33 is in the range of 38.8 ° to 151.32 °. Therefore, fine bubbles can be generated efficiently. In addition, a high bubble concentration can be realized.
- the element 33 is made of a material mainly composed of ceramic. Therefore, since the amount of impurities (so-called contamination) contained in the liquid in which fine bubbles are generated is small, it is suitable for fields where the amount of impurities is better, such as the medical field.
- Fine bubble generator 1 First tank 3, second tank 5, gas supply unit 9, differential pressure applying unit 10, liquid supply unit 11, liquid take-out unit 13, bubble generation unit 31, element 33 of the first embodiment.
- a fine bubble generator a first tank, a second tank, a gas supply unit, a differential pressure applying unit, a liquid supply unit, a liquid extraction unit, a bubble generation unit, and an element of the present disclosure.
- an element 75 similar to that of the first embodiment is disposed in a single tank 73, and an upper end of the element 75 is The communication pipe 77 is connected.
- This communication pipe 77 extends outside the tank 73, and an open / close bubble 79 is arranged outside the tank 73 in the communication pipe 77.
- the opening and closing bubble 79 is opened, and a liquid (for example, water) to which a predetermined pressure is applied is supplied from the communication pipe 77 to the inside of the element 75 (that is, the inner space 81), whereby the first embodiment is performed.
- a liquid for example, water
- fine bubbles can be generated in the liquid. That is, the fine bubble liquid can be supplied to the outer space 83 around the element 75.
- the configuration for taking out the fine bubble liquid from the tank 73 is the same as in the first embodiment.
- the second embodiment has the same effects as the first embodiment. Further, there is an advantage that the configuration can be simplified as compared with the first embodiment.
- the third embodiment is different from the first embodiment only in the configuration of the bubble generation unit, and therefore, the bubble generation unit will be described.
- the bubble generating portion 93 of the fine bubble generating device 91 of the third embodiment has a cylindrical element 97 connected to the lower end of the communication pipe 95.
- the element 97 is open at both ends in its axial direction (vertical direction in FIG. 4), has an upper end connected to the communication pipe 95, and has a lower end closed by a cap 99.
- the cap 99 has a columnar shape and is a dense sintered body made of, for example, alumina.
- the third embodiment has the same effects as the first embodiment.
- a plate-shaped member is used as an element.
- the fine bubble generator 101 of the fourth embodiment has a configuration in which a second tank 105 is disposed below a first tank 103, as in the first embodiment.
- a flat plate-shaped element 107 is horizontally arranged between the first tank 103 and the second tank 105 so as to divide the first tank 103 and the second tank 105. Note that the element 107 is positioned and fixed by a support member 111 provided on the side wall 109.
- FIG. 5 other configurations (for example, a configuration for supplying gas or liquid to the first tank 103) are omitted.
- the liquid can pass through the element 107 and generate fine bubbles in the liquid. That is, the fine bubble liquid can be supplied into the second tank 105 below the element 107.
- the configuration for taking out the fine bubble liquid from the second tank 105 is the same as in the first embodiment.
- the fourth embodiment has the same effect as the first embodiment.
- Example Nos. 1 to 59 samples (Sample Nos. 1 to 59) as shown in Tables 1 to 6 were prepared as elements used in the experiment.
- the samples of Examples (Examples 1 to 32) are samples within the range of the present disclosure
- the samples of Comparative Examples (Comparative Examples 1 to 27) are samples outside the range of the present disclosure. is there.
- the symmetric structure of the element structure indicates that the structure of the element is a single structure.
- the asymmetric structure indicates that the inside and outside of the element are different structures.
- the asymmetric structure is a two-layer structure in which the average pore diameter is smaller on the outside (ie, the outer layer) of the element than on the inside (ie, the inner layer).
- the element material indicates the material (material) that constitutes the element. Accordingly, the element is a porous member made of this material.
- the contact angle is, as is well known, the angle between the liquid surface and the wall at the point where the free surface of the stationary liquid contacts the wall.
- the maximum pore diameter DBP [m] of the pores, the surface tension ⁇ [N / m] of the liquid, the contact angle ⁇ [radra], and the bubble point pressure P [Pa] have the relationship shown in the following equation (1). .
- the maximum pore diameter DBP [m] of the pore is a diameter when the pore is a circular hole.
- DBP 4 ⁇ cos ⁇ / P (1) (4) Bubble point pressure
- a plate-like element is immersed in a liquid such as isopropyl alcohol to make it horizontal, air is supplied from below and the pressure of the air is increased, the maximum value is first reached when a certain value is reached. Bubbles are generated from the pores of the pore size. The pressure at this time is called a bubble point pressure. The maximum pore diameter can be obtained from the bubble point pressure by using the above equation (1).
- Pure water In this experimental example 1, pure water was used as the liquid.
- This pure water generally indicates a liquid that has been subjected to a desalination / deionization treatment with an ion exchange resin or the like, and has a predetermined range of electric conductivity and TOC (total organic carbon).
- the pH and the electric conductivity were measured using a pH water quality meter D-74 manufactured by HORIBA.
- TOC was measured using TOC-VWP manufactured by Shimadzu Corporation.
- ICP-MS was measured using ⁇ SCIENTIFIC iCAP ⁇ Q manufactured by ThermoFisher.
- DO was measured using ⁇ -71 manufactured by Horiba, Ltd.
- ATP was measured using Lumitester PD-30.
- NanoSight NS-300 (hereinafter simply referred to as nanosite), the bubble diameter [nm], bubble concentration [pieces / ml], and bubble concentration [pieces / frame] were examined.
- [pieces / frame] indicates the number of particles reflected per screen in the measurement of nanosites, and 1500 frames are acquired for one measurement. That is, the average value of the number of particles reflected in 1500 frames is represented as [number / frame].
- the pure water used in this experiment had an electric conductivity of 47.9 to 83.2 [ ⁇ S / m] and a TOC of 5 to 40.1 [ ⁇ g / L]. is there. Water in this range can be referred to as pure water.
- the element length is the length of the element in the axial direction
- the element outer diameter is the diameter of the outer periphery of the element as viewed from the axial direction. Therefore, the element effective area can be determined from the element length and the element outer diameter.
- the film thickness is the thickness (dimension in the radial direction) of the cylindrical element.
- the surface porosity is the surface ratio of pores occupying the element effective area.
- the surface porosity can be determined by acquiring an image of the element surface with a scanning electron microscope (SEM) or the like, binarizing the image (black and white), and calculating the area ratio between black and white (specifically, black indicating pores in the element effective area). Ratio).
- Pore size is a diameter when the pores are circular holes (specifically, an average value of many pores: average pore diameter).
- the pore diameter was measured using mercury porosimetry.
- Solvent type is a liquid that generates fine bubbles, and here pure water is used.
- solvent amount indicates the amount (VO [ml]) of the liquid supplied to the first tank.
- the applied pressure indicates the pressure of the gas supplied from the gas cylinder to the first tank (therefore, the pressure in the first tank).
- the time required until the entire amount of the solvent passes means that the liquid in the first tank (therefore, the liquid in the space inside the element) is entirely in the second tank ( Therefore, it is the time [sec] required to move to the outer space of the element).
- the flow rate Q [m 3 / s] is the amount [m 3 ] of the liquid that has moved from the inside to the outside of the element per unit time [sec].
- the flow rate Q can be determined by dividing the “solvent amount” by the “time required until the entire amount of the solvent passes”.
- Pore area A indicates the total pore area on the outer surface of the element. That is, the pore area A is the sum of the pore areas in the element effective area.
- the total pore area can be determined by acquiring an image of the element surface by SEM or the like, binarizing the image (black and white), and calculating the total area of black indicating pores.
- Flow velocity V is the flow velocity of the liquid passing through the pores of the element, and can be obtained by calculating the flow rate Q [m 3 / s] / pore area A [m 2 ].
- Bubble diameter and bubble concentration The bubble diameter and bubble concentration are measured by nanosite.
- Each sample of the present embodiment has a flow rate of 0.009769 [m / s] or more, and all of these samples have a high bubble concentration and are suitable.
- the bubble concentration is 7.30 ⁇ 10 7 [pieces / ml], which is preferable.
- each sample of this example has a pore diameter of the element (that is, an average pore diameter) of 1.5 ⁇ m to 500 ⁇ m. Is obtained.
- the lower limit of the average pore diameter of 1.5 ⁇ m is described in Sample Nos. 1 to 3, and the upper limit of 500 ⁇ m is described in Samples No. 50, 51, 52 and the like.
- each sample of the present example has a surface porosity of the element of 24% to 47.7%, and within this range, the sample has a high porosity as described above. It can be seen that a bubble concentration is obtained.
- the contact angle of the liquid (pure water) on the surface of the element is 38.8 ° to 151.32 °, and this range Then, as described above, it can be seen that a high bubble concentration can be obtained.
- the bubble diameter of the bubble contained in the first tank and the bubble contained in the second tank hardly change. That is, in the present disclosure, for example, when the liquid in the first tank passes through the pores of the porous element, a sudden change in pressure is caused to generate fine bubbles. The bubble diameter hardly changes before and after passage. In order to cause this phenomenon, as described above, a flow velocity of 0.009769 [m / s] or more is required.
- the average value of the bubble diameter of the fine bubbles was 100.26 nm.
- the average value of the bubble diameter of the fine bubbles was 100.80 nm (see Table 4: Ave value of the example).
- the nozzle method is a method in which a liquid (pure water) is flowed into a pipe having pores formed on the wall surface by a pump, and air is supplied from the outside through the pores in the middle of the pipe.
- Experimental Example 4 In Experimental Example 4, as shown in FIGS. 7 and 8, pure water was used as the liquid, and the fine bubble generator of the embodiment in Experimental Example 1 and various fine bubble generators other than the present disclosure were used. Then, fine bubbles are generated, and various characteristics of the fine bubble liquid (specifically, fine bubble water) are examined. When the characteristics were examined, the same type of glass was used as a container for containing the fine bubble liquid, and the measurement environment was adjusted as much as possible.
- the micro-porous device means a micro-porous fine bubble generator using a ceramic element of Company C (that is, a comparative example).
- This fine bubble generator is a device that submerges a porous element (ie, a pipe) whose tip is closed in a liquid, supplies gas into the pipe, and generates fine bubbles outside the pipe.
- the first time refers to the properties of the fine bubble liquid after the first generation of the fine bubbles under the following conditions
- the fifth time refers to the fine bubble liquid after the fifth generation of the fine bubbles under the same conditions. Shows the characteristics of
- FIG. 7A shows the result of examining the pH of the fine bubble liquid. From FIG. 7A, it can be seen that each sample of the example is close to the pH of pure water. On the other hand, in the first time of the microporous method, the pH value is as large as 7 or more.
- FIG. 7B shows the result of examining the electric conductivity of the fine bubble liquid. From FIG. 7B, it is understood that each sample of the example is close to the electric conductivity of pure water. On the other hand, in the first time of the microporous method, the value of the electric conductivity is as very large as 738 [ ⁇ S / m]. Other generation methods also show an increase in electrical conductivity.
- FIG. 7C shows the result of examining the ATP of the fine bubble liquid. From FIG. 7C, it is understood that each sample of the example is close to ATP of pure water. On the other hand, in the first time of the microporous method, the value of ATP is as very large as 55.
- FIG. 8A shows the result of examining the TOC of the fine bubble liquid. From FIG. 8A, it can be seen that each sample (T26, T55) of the example is close to the TOC of pure water. In the sample (T59), the circulating pressure melting apparatus and the circulating gas-liquid shearing apparatus of the embodiment, the TOC has a large value. Further, TOC could not be measured by the microporous method.
- FIG. 8B shows the result of examining the ICP-MS of the fine bubble liquid. From FIG. 8B, it is understood that each sample of the example is close to ICP-MS of pure water. On the other hand, in the first time of the microporous method, the value of ICP-MS is as large as 548 [ppb].
- the liquid for which the particle concentration is to be measured is substantially the same as in Experimental Example 4. Specifically, pure water, a fine bubble liquid of T26, a fine bubble liquid obtained by a micropore type apparatus (however, the first time), each obtained by a circulating pressure dissolution apparatus and a circulating gas-liquid shearing apparatus, Fine bubble liquid, and fine bubble liquids of T55 and T59. In addition, a liquid in which Latex particles were dispersed in a solvent (pure water) was also used.
- the method of distinguishing between bubbles and solid particles by the slow freeze-thaw method disclosed at the 8th International Fine Bubble Symposium was used. Specifically, after cooling each sample at a predetermined cooling rate (for example, 0.57 ⁇ 10 ⁇ 2 [K / s]) and freezing it, a predetermined heating rate (for example, 0.76 ⁇ 10 ⁇ 2 [K / s]) / S]) and the liquid was melted, and the particle concentration of the liquid before and after freezing was measured.
- a predetermined cooling rate for example, 0.57 ⁇ 10 ⁇ 2 [K / s]
- a predetermined heating rate for example, 0.76 ⁇ 10 ⁇ 2 [K / s]
- FIG. 9A shows the particle concentration of each sample obtained in Experimental Example 5 before and after freezing.
- a pair of bar graphs shows the particle concentration of each sample
- the left side shows the particle concentration before freezing
- the right side shows the particle concentration after freezing.
- FIG. 9B shows the particle concentration of each sample after freezing when the particle concentration before freezing (that is, before defoaming) is set to 100 in the graph of FIG. 9A.
- a bar flag on the left side of each pair of bar graphs indicates before defoaming
- a bar graph on the right side indicates after defoaming.
- the particle concentration is significantly reduced after freezing.
- the defoaming rate of the sample of T26 in the example is 88.36%, and it can be seen that most of the samples are bubbles.
- the defoaming rate is an index indicating how much of the detected particles are bubbles, and is defined by “(particle concentration of liquid after freezing / particle concentration of liquid before freezing) ⁇ 100”. Is done.
- the defoaming rate of the sample of T56 in the example was 82.35%, and it was found that almost all of the samples were air bubbles.
- the defoaming rate of the sample of T59 in the example is 7.37%, and it can be seen that most of the samples are bubbles.
- the defoaming rate was 15.20%, and it can be seen that most were solid particles.
- the defoaming rate was 72.74%, but the particle concentration before defoaming was as low as 2.59E + 07 [particles / ml] (see FIG. 9A).
- the defoaming rate was 65.98% in the circulating pressure dissolution apparatus of the comparative example, which indicates that there are more solid particles than in the examples.
- the defoaming rate was 78.95%, indicating that there were more solid particles than in the examples.
- the defoaming rate was 11.15%.
- the shape of the element various shapes such as a cylindrical shape with a bottom, a cylindrical shape with both ends opened in the axial direction, and a plate shape can be adopted.
- the supply amount and the flow rate of the liquid supplied into the first tank are measured by a sensor, the pressure in the first tank is measured by a sensor, and based on the value measured by the sensor, the flow rate of the liquid and the like are determined.
- the opening and closing operation of the on-off valve may be controlled so that the pressure in the tank becomes a target value. Therefore, the configuration for generating fine bubbles can be inlined.
- each of the above embodiments may be assigned to a plurality of components, or the function of a plurality of components may be exerted by one component. Further, a part of the configuration of each of the above embodiments may be omitted. Further, at least a part of the configuration of each of the above embodiments may be added to or replaced with the configuration of another embodiment. Note that all aspects included in the technical idea specified by the language described in the claims are embodiments of the present disclosure.
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Abstract
Description
・多孔質のエレメントとは、多数の細孔(即ち液体が通過可能な連通孔)が形成された多孔質の部材を示している。このエレメントとしては、例えば内側から外側、或いは、外側から内側に液体が通過可能な筒状の部材、例えば先端が閉塞された筒状の部材や両端が開放された筒状の部材が挙げられる。また、一方の側から他方の側に液体の通過が可能な膜状(例えば板状)の部材などが挙げられる。
3、103…第1タンク
5、105…第2タンク
9…ガス供給部
10…差圧付与部
11…液体供給部
13…液体取出部
31…バブル発生部
33、75、97、107…エレメント
[1-1.全体構成]
まず、第1実施形態のファインバブル発生装置の構成について説明する。
第1タンク3は、液体を収容することができる容器であり、内部を加圧できるように構成されている。つまり、後述する、液体の供給や流出、気体の流入部分以外は、液体や気体が流出しないような気密構造となっている。
第2タンク5は、液体(即ちファインバブル液)を収容することができる容器であり、その内部には、ファインバブルを発生させるバブル発生部31を備えている。
ガス供給部9は、ガスが充填されたガスボンベ43と、ガスボンベ43とガス導入口17とを接続する第1パイプ45と、第1パイプ45の流路を開閉する第1開閉弁47と、ガスボンベ43内の圧力を検出する第3圧力センサ49と、を備えている。
次に、ファインバブル発生装置1の動作について説明する。
ここで、エレメント33の製造方法について説明する。なお、このエレメント33については、定法により製造できるので、簡単に説明する。
(1)本第1実施形態では、気体によって付与された差圧によって、液体が多孔質のエレメント33を通過する際の流速を、0.009769[m/s]以上とすることにより、ファインバブルを効率良く発生させることができる。
第1実施形態の、ファインバブル発生装置1、第1タンク3、第2タンク5、ガス供給部9、差圧付与部10、液体供給部11、液体取出部13、バブル発生部31、エレメント33は、それぞれ、本開示の、ファインバブル発生装置、第1タンク、第2タンク、ガス供給部、差圧付与部、液体供給部、液体取出部、バブル発生部、エレメントの一例に相当する。
次に、第2実施形態について説明するが、第1実施形態と同様な内容については、その説明は省略又は簡略化する。
次に、第3実施形態について説明するが、第1実施形態と同様な内容については、その説明は省略又は簡略化する。
次に、第4実施形態について説明するが、第1実施形態と同様な内容については、その説明は省略又は簡略化する。
次に、本開示の効果を確認するために行った実験例について説明する。なお、液体としては、純水を用いた。
<実験内容>
この実験例1では、ファインバブルを発生させる装置として、前記第3実施形態と同様なエレメントを採用し、第1実施形態と同様な構造のファインバブル発生装置を用いた。
エレメント構造の対称構造とは、エレメントの構造が単一の構造であることを示している。非対称構造とは、エレメントの内側と外側とが異なる構造であることを示している。詳しくは、非対称構造は、2層構造であり、エレメントの外側(即ち外側の層)の方が内側(即ち内側の層)よりも平均細孔径が小さくなっている。
エレメント材質は、エレメントを構成する材質(材料)を示す。従って、エレメントは、この材料から構成された多孔質の部材である。
接触角とは、周知のように、静止液体の自由表面が壁に接する点において、液面と壁とのなす角である。
(4)バブルポイント圧
例えば板状のエレメントをイソプロピルアルコールなどの液体に浸して水平とし、下側から空気を供給するとともに空気の圧力を上げてゆくと、ある値に達したときに最初に最大孔径の孔から気泡が発生する。このときの圧力をバブルポイント圧と呼ぶ。なお、前記式(1)を用い、バブルポイント圧から最大孔径を求めることができる。
この実験例1では、液体として純水を用いた。この純水は、通常、イオン交換樹脂などによって、脱塩・脱イオン処理を行った液を示し、所定の範囲の電気伝導率、TOC(全有機炭素)を有している。
この実験例1では、図6に示すように、円筒形状のエレメントを用いるので、液体の通過が可能なエレメントの側面(即ち円筒の外周面)の面積を、エレメント有効面積としている。
表面気孔率は、エレメント有効面積に占める細孔の表面比率である。この表面気孔率は、走査型電子顕微鏡(SEM)等により、エレメント表面の画像を取得し、その画像を二値化(白黒)し、白黒の面積比率(詳しくエレメント有効面積における細孔を示す黒の割合)により求めることができる。
細孔径とは、細孔を円孔とした場合の直径(詳しくは多数の細孔の平均値:平均細孔径)である。ここでは、水銀ポロシメトリを用いて、細孔径を測定した。なお、水銀ポロシメトリとして、オートポアIV9510(島津製作所製)を用いた。
溶媒種とは、ファインバブルを発生させる液体を示しており、ここでは純水を用いている。
溶媒量とは、第1タンクに供給する液体の量(VO[ml])を示している。
印加圧力とは、ガスボンベから第1タンクに供給される気体の圧力(従って第1タンク内の圧力)を示している。
溶媒全量が通過するまでに要した時間とは、第1タンク内の液体(従ってエレメントの内側空間の液体)が、全て、第2タンク内(従ってエレメントの外側空間)に移動するまでの時間[sec]である。
流量Q[m3/s]とは、単位時間[sec]当たりに、エレメントの内側から外側に移動した液体の量[m3]である。この流量Qは、前記「溶媒量」を前記「溶媒全量が通過するまでに要した時間」で除すことにより求めることができる。
細孔面積A[m2]とは、エレメントの外側表面における全細孔面積を示している。つまり、細孔面積Aは、エレメント有効面積における細孔の面積の合計である。この全細孔面積は、SEM等により、エレメント表面の画像を取得し、その画像を二値化(白黒)し、細孔を示す黒の面積の合計により求めることができる。
流速V[m/s]とは、エレメントの細孔を通過する液体の流速であり、流量Q[m3/s]/細孔面積A[m2]の演算により求めることができる。
気泡径、気泡濃度は、ナノサイトによって測定したものである。
本実施例の各試料は、流速が0.009769[m/s]以上であり、これらの試料は、いずれも気泡濃度が高く好適である。例えば最も流速が小さな試料No.54でも、気泡濃度が7.30×107[個/ml]であり、好適である。
前記特許文献3、4の先行技術は、上述したように、本開示とは全く異なる技術である。つまり、前段タンクの水に含有されている大きい気泡をせん断して微細気泡とする技術であり、気泡のせん断が必要な技術である。
本実験例3は、市販の2社のノズル方式のファインバブル発生装置を用いて、ファインバブルの発生状態を調べたものである。
本実験例4は、図7及び図8に示すように、液体として純水を採用し、前記実験例1における実施例のファインバブル発生装置や、本開示以外の各種のファインバブル発生装置を用いて、ファインバブルを発生させ、そのファインバブル液(詳しくはファインバブル水)の各種の特性を調べたものである。なお、特性を調べる際には、ファインバブル液を入れる容器としては同種のガラス製のものを用い、できる限り測定環境を揃えた。
図7及び図8において、「T26:セラミックス」とは、試料No.26の実施例を示し、「T55:金属」とは、試料No.55の実施例を示し、「T59:樹脂」とは、試料No.59の実施例を示す。
設定圧力:0.11MPa
処理時間:1時間
溶媒 :純水 500ml
ガス種 :窒素ガス
ガス流量:600ml/min
さらに、他の比較例として、周知の循環型加圧溶解装置及び循環型気液せん断装置を用いて、ファインバブルを発生させて、ファインバブル液の特性を調べた。
図7Aに、ファインバブル液のpHを調べた結果を示す。この図7Aから、実施例の各試料は、純水のpHに近いことが分かる。それに対して、微細孔方式の1回目では、pHの値が7以上と大きくなっている。
本実験例5は、ファインバブル発生装置にて発生したファインバブルが、実際にファインバブルであるのか、或いは、微細な塵等の粒子(即ち固体粒子)であるか否かを確認したものである。つまり、ナノサイトは、微細な粒子をファインバブルとしてカウントすることがあるので、実際に測定された粒子濃度(即ち、気泡の場合は気泡濃度)が、どの程度ファインバブルの濃度を示しているかを確認したものである。
粒子濃度を測定する対象の液体は、前記実験例4とほぼ同様である。具体的には、純水、T26のファインバブル液、微細孔方式の装置で得られたファインバブル液(但し1回目)、循環型加圧溶解装置及び循環型気液せん断装置で得られた各ファインバブル液、T55及びT59の各ファインバブル液である。なお、それ以外に、Latex粒子を溶媒(純水)に分散させた液体も用いた。
本実験例5では、各試料の液体を、一旦凍結させた後に融解し、その凍結前後の液体における粒子濃度を、ナノサイトを用いて調べた。
図9Aは、本実験例5によって得られた各試料の凍結前後の粒子濃度を示している。このグラフでは、一対の棒グラフで、各試料の粒子濃度を示しており、左側が凍結前の粒子濃度、右側が凍結後の粒子濃度である。なお、図9Bは、図9Aのグラフを、凍結前(即ち消泡前)の粒子濃度を100とした場合の各試料の凍結後の粒子濃度を示している。なお、図9A及び図9Bにおいて、各一対の棒グラフの左側に棒フラグが消泡前を示し、右側の棒グラフが消泡後を示している。
尚、本開示は、前記実施形態等に何ら限定されるものではなく、本開示の技術的範囲に属する限り種々の形態を採り得ることはいうまでもない。
Claims (9)
- 多数の細孔を有する多孔質のエレメントに、液体を通過させて、前記液体中にファインバブルを発生させるファインバブル発生装置であって、
前記エレメントの一方の側と他方の側との間に差圧を付与する差圧付与部と、
前記差圧付与部によって付与された差圧によって、前記エレメントの一方の側に配置した前記液体を、前記他方の側に通過させるとともに噴射させて、前記ファインバブルを発生させるバブル発生部と、
を備え、
前記液体が前記エレメントを通過する際の流速が、0.009769[m/s]以上である、
ファインバブル発生装置。 - 前記エレメントの平均細孔径は、1.5μm~500μmである、
請求項1に記載のファインバブル発生装置。 - 前記エレメントの表面気孔率は、24%~47.7%である、
請求項1又は2に記載のファインバブル発生装置。 - 前記エレメントの表面における前記液体の接触角は、38.8°~151.32°である、
請求項1~3のいずれか1項に記載のファインバブル発生装置。 - 前記エレメントは、セラミックからなる、
請求項1~4のいずれか1項に記載のファインバブル発生装置。 - 前記エレメントと一体に構成された第1タンクと、前記エレメントから噴射された前記液体を受ける第2タンクと、を備えた、
請求項1~5のいずれか1項に記載のファインバブル発生装置。 - 前記第1タンクに、前記差圧付与部として前記第1タンク内に前記差圧を付与するガスを供給するガス供給部と、前記第1タンク内に前記液体を供給する液体供給部と、を備えた、
請求項6に記載のファインバブル発生装置。 - 前記第2タンクに、前記噴射後の液体を外部に取り出す液体取出部を備えた、
請求項6又は7に記載のファインバブル発生装置。 - 多数の細孔を有する多孔質のエレメントに、液体を通過させて、前記液体中にファインバブルを発生させるファインバブル発生方法であって、
前記エレメントの一方の側と他方の側との間に差圧を付与することにより、前記エレメントの一方の側に配置された前記液体を、前記他方の側に通過させるとともに噴射させて、前記ファインバブルを発生させる工程を有し、
前記液体が前記エレメントを通過する際の流速を、0.009769[m/s]以上とする、
ファインバブル発生方法。
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US17/256,050 US20210146318A1 (en) | 2018-06-28 | 2019-06-28 | Fine bubble generation device and fine bubble generation method |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021154262A (ja) * | 2020-03-30 | 2021-10-07 | 日本特殊陶業株式会社 | ファインバブル液生成装置 |
WO2023079812A1 (ja) * | 2021-11-04 | 2023-05-11 | キヤノン株式会社 | ウルトラファインバブル含有液の製造方法およびウルトラファインバブル含有液の製造装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11179684B2 (en) * | 2017-09-20 | 2021-11-23 | New Jersey Institute Of Technology | System, device, and method to manufacture nanobubbles |
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TWI813188B (zh) * | 2022-03-03 | 2023-08-21 | 謝志欽 | 外氣式微細氣泡產生裝置 |
TWI813189B (zh) * | 2022-03-03 | 2023-08-21 | 謝志欽 | 內氣式微細氣泡生成裝置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6382426U (ja) * | 1986-11-18 | 1988-05-30 | ||
JP2002301345A (ja) | 2001-02-05 | 2002-10-15 | Teruji Sasaki | 気泡水製造装置 |
JP2007237161A (ja) * | 2006-02-09 | 2007-09-20 | Hiroshima Kasei Ltd | 加水素水の製造方法及び製造装置 |
JP2017047374A (ja) | 2015-09-02 | 2017-03-09 | S.P.エンジニアリング株式会社 | 多孔質体アッセンブリおよびその製造方法 |
US20170259218A1 (en) * | 2015-06-30 | 2017-09-14 | Kechuang Lin | Bubble-generation apparatus and system |
JP2017170278A (ja) | 2016-03-18 | 2017-09-28 | 株式会社ノリタケカンパニーリミテド | 微小気泡発生装置 |
JP2017217585A (ja) | 2016-06-03 | 2017-12-14 | 株式会社テクノアート | ファインバブル液製造装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1840433U (de) * | 1961-08-08 | 1961-11-02 | Friedrich Hueber | Geraet zum zufuehren von gas, insbesondere luft in stroemende fluessigkeiten, insbesondere in bier. |
GB9930322D0 (en) * | 1999-12-22 | 2000-02-09 | Univ Leeds | Rotating membrane |
US7255332B2 (en) * | 2004-05-25 | 2007-08-14 | The Board Of Trustees Of The University Of Arkansas | System and method for dissolving gases in liquids |
JP4151681B2 (ja) * | 2005-07-19 | 2008-09-17 | 株式会社日立製作所 | 微細気泡生成装置及びその方法 |
JP4910322B2 (ja) * | 2005-07-19 | 2012-04-04 | 株式会社日立製作所 | 微細気泡を利用した水処理設備 |
DE502007000947D1 (de) * | 2006-03-29 | 2009-08-06 | Carbotek Holding Gmbh | Imprägnierer |
US20090124945A1 (en) * | 2007-11-08 | 2009-05-14 | Reich Bonnie E | High Efficiency Water Pick Cleaning Apparatus and Showerhead |
JP4914399B2 (ja) * | 2008-04-17 | 2012-04-11 | 株式会社オ−ラテック | ナノバブル発生方法およびナノバブル発生装置 |
JP5885376B2 (ja) * | 2008-07-30 | 2016-03-15 | 株式会社西研デバイズ | 超微細気泡発生装置 |
JP6093928B2 (ja) * | 2011-04-22 | 2017-03-15 | 国立大学法人東北大学 | 口腔洗浄装置 |
US20140191425A1 (en) * | 2011-12-16 | 2014-07-10 | Panasonic Corporation | System and method for generating nanobubbles |
JP2016123925A (ja) * | 2014-12-26 | 2016-07-11 | ライオン株式会社 | ナノバブル生成促進剤及びナノバブル生成方法 |
KR102587718B1 (ko) * | 2016-01-25 | 2023-10-12 | 가부시키가이샤 노리타께 캄파니 리미티드 | 미소 기포 함유 액체의 생성 장치 |
-
2019
- 2019-06-28 JP JP2019563644A patent/JP7464390B2/ja active Active
- 2019-06-28 CN CN201980043316.XA patent/CN112313000A/zh active Pending
- 2019-06-28 US US17/256,050 patent/US20210146318A1/en not_active Abandoned
- 2019-06-28 WO PCT/JP2019/025955 patent/WO2020004653A1/ja active Application Filing
- 2019-06-28 EP EP19825692.7A patent/EP3815774A4/en not_active Withdrawn
-
2020
- 2020-12-24 IL IL279742A patent/IL279742A/en unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6382426U (ja) * | 1986-11-18 | 1988-05-30 | ||
JP2002301345A (ja) | 2001-02-05 | 2002-10-15 | Teruji Sasaki | 気泡水製造装置 |
JP2007237161A (ja) * | 2006-02-09 | 2007-09-20 | Hiroshima Kasei Ltd | 加水素水の製造方法及び製造装置 |
US20170259218A1 (en) * | 2015-06-30 | 2017-09-14 | Kechuang Lin | Bubble-generation apparatus and system |
JP2017047374A (ja) | 2015-09-02 | 2017-03-09 | S.P.エンジニアリング株式会社 | 多孔質体アッセンブリおよびその製造方法 |
JP2017170278A (ja) | 2016-03-18 | 2017-09-28 | 株式会社ノリタケカンパニーリミテド | 微小気泡発生装置 |
JP2017217585A (ja) | 2016-06-03 | 2017-12-14 | 株式会社テクノアート | ファインバブル液製造装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3815774A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021154262A (ja) * | 2020-03-30 | 2021-10-07 | 日本特殊陶業株式会社 | ファインバブル液生成装置 |
WO2023079812A1 (ja) * | 2021-11-04 | 2023-05-11 | キヤノン株式会社 | ウルトラファインバブル含有液の製造方法およびウルトラファインバブル含有液の製造装置 |
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