WO2015072461A1 - Dispositif générant un liquide microbicide - Google Patents

Dispositif générant un liquide microbicide Download PDF

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Publication number
WO2015072461A1
WO2015072461A1 PCT/JP2014/079874 JP2014079874W WO2015072461A1 WO 2015072461 A1 WO2015072461 A1 WO 2015072461A1 JP 2014079874 W JP2014079874 W JP 2014079874W WO 2015072461 A1 WO2015072461 A1 WO 2015072461A1
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WIPO (PCT)
Prior art keywords
liquid
flow path
gas
plasma
channel
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PCT/JP2014/079874
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English (en)
Japanese (ja)
Inventor
沖野　晃俊
秀一 宮原
貴也 大下
洋輔 渡辺
利寛 高松
雅一 柏
平野　正浩
一寛 西原
前田　重雄
Original Assignee
沖野　晃俊
Idec株式会社
秀一 宮原
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Application filed by 沖野　晃俊, Idec株式会社, 秀一 宮原 filed Critical 沖野　晃俊
Publication of WO2015072461A1 publication Critical patent/WO2015072461A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • 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
    • 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
    • B01F23/23411—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere by cascading the liquid
    • 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
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31243—Eductor or eductor-type venturi, i.e. the main flow being injected through the venturi with high speed in the form of a jet
    • 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
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical

Definitions

  • the present invention relates to a sterilizing liquid generating apparatus.
  • the micro-plasma discharge is generated in the pressurized gas in the gas-liquid mixing tank in which the liquid is stored, thereby generating the effective mist generated by the discharge.
  • a gas-liquid mixture in which bubbles containing components are present is generated.
  • the gas-liquid mixed liquid is sent to the mist generating section as a functional liquid containing ultra fine bubbles after large bubbles are removed in the defoaming section.
  • the present invention is directed to a sterilizing liquid generating apparatus, and an object thereof is to provide a sterilizing liquid having sterilizing power.
  • the sterilizing liquid generating apparatus includes a plasma generating unit that generates a plasma-containing gas, which is a gas containing plasma from a gas, and a mixture fluid obtained by mixing the plasma-containing gas and the liquid from the plasma generating unit.
  • the sterilizing liquid generating apparatus can provide a sterilizing liquid having sterilizing power.
  • the gas is oxygen or air.
  • FIG. drawing shows the microbubble production
  • FIG. 1 is a cross-sectional view showing a fine bubble generating device 1 which is a sterilizing liquid generating device according to an embodiment of the present invention.
  • the fine bubble generating device 1 includes a fine bubble generating nozzle 2, a pressurized liquid generating unit 3, a pressurized liquid channel 4, a storage unit 5, and a circulation channel 6.
  • the pressurized liquid channel 4 connects the pressurized liquid generating unit 3 and the fine bubble generating nozzle 2.
  • the tip of the fine bubble generating nozzle 2 is connected to the side wall 51 of the reservoir 5.
  • the pressurizing liquid generating unit 3 generates a pressurizing liquid 71 obtained by pressurizing and dissolving a gas in the liquid, and supplies the pressurizing liquid 71 to the fine bubble generating nozzle 2 through the pressurizing liquid channel 4.
  • the fine bubble generating nozzle 2 generates a liquid containing fine bubbles from the pressurized liquid 71 and supplies the liquid containing fine bubbles to the liquid stored in the reservoir 5 (hereinafter referred to as “reserved liquid 91”).
  • the fine bubbles are ultra fine bubbles having a diameter of less than 1 ⁇ m (micrometer). In the pressurized liquid production
  • the pressurized liquid generating unit 3 generates a pressurized liquid 71 in which air is pressurized and dissolved in the liquid. Further, a liquid containing fine air bubbles (so-called ultra fine bubbles) having a diameter of less than 1 ⁇ m is generated by the fine bubble generating nozzle 2 and supplied into the storage liquid 91 in the storage unit 5.
  • fluids such as the pressurized liquid 71 and the reservoir liquid 91 are indicated by a parallel oblique line with a broken line.
  • the pressurized liquid generation unit 3 includes a mixing nozzle 31, a dissolution channel unit 32, a pump 33, and a plasma generation unit 34.
  • the ultra fine bubble generating unit includes at least the dissolution channel unit 32 and the fine bubble generating nozzle 2.
  • a gas hereinafter referred to as “plasma-containing gas” or simply “gas” including the liquid pumped by the pump 33 to the mixing nozzle 31 that is the mixing unit and the plasma generated by the plasma generating unit 34.
  • plasma-containing gas gas
  • the dissolution flow path portion 32 which is a dissolution portion is pressurized and in a state where the pressure is higher than the atmospheric pressure (hereinafter referred to as “pressurized environment”), and the liquid ejected from the mixing nozzle 31 and the plasma are contained. While the fluid mixed with the gas (hereinafter referred to as “mixed fluid 72”) flows through the dissolution flow path portion 32 in a pressurized environment, the plasma-containing gas is pressurized and dissolved in the liquid and pressurized. Liquid 71 is produced.
  • a counter electrode is provided as a discharge unit inside the plasma generation unit 34. For example, a high voltage of about 10 kV is applied to cause discharge between the counter electrodes. Due to the discharge, plasma is generated in the gas passing through the discharge part.
  • FIG. 2 is an enlarged cross-sectional view showing the mixing nozzle 31.
  • the mixing nozzle 31 includes a liquid inlet 311, a gas inlet 319, and a mixed fluid outlet 312.
  • the liquid pumped by the pump 33 flows from the liquid inlet 311.
  • the plasma generator 34 is disposed at the gas inlet 319 of the mixing nozzle 31.
  • Plasma-containing gas flows from the gas inlet 319.
  • a mixed fluid 72 (see FIG. 1) in which the liquid flowing in from the liquid inlet 311 and the plasma-containing gas flowing in from the gas inlet 319 are mixed is ejected.
  • the liquid inlet 311, the gas inlet 319, and the mixed fluid outlet 312 are each substantially circular.
  • the flow path section of the nozzle flow path 310 from the liquid inlet 311 to the mixed fluid outlet 312 and the flow path cross section of the gas flow path 3191 from the gas inlet 319 to the nozzle flow path 310 are also substantially circular.
  • the channel cross section means a cross section perpendicular to the central axis of the flow path such as the nozzle flow path 310 and the gas flow path 3191, that is, a cross section perpendicular to the flow of fluid flowing through the flow path.
  • the area of the channel cross section is referred to as “channel area”.
  • the nozzle flow path 310 is a Venturi tube having a flow path area that becomes smaller in the middle of the flow path.
  • the mixing nozzle 31 includes an introduction portion 313, a first taper portion 314, a throat portion 315, a gas mixing portion 316, and a second portion that are continuously arranged in order from the liquid inlet 311 toward the mixed fluid outlet 312. A tapered portion 317 and a lead-out portion 318 are provided.
  • the mixing nozzle 31 also includes a gas supply unit 3192 in which a gas flow path 3191 is provided.
  • the flow path area is substantially constant at each position in the central axis J1 direction of the nozzle flow path 310.
  • the flow path area gradually decreases in the liquid flow direction (that is, toward the downstream side).
  • the throat 315 the flow path area is substantially constant.
  • the channel area of the throat 315 is the smallest in the nozzle channel 310. In the nozzle channel 310, even if the channel area slightly changes in the throat 315, the entire portion having the smallest channel area is regarded as the throat 315.
  • the flow channel area is substantially constant and is slightly larger than the flow channel area of the throat 315.
  • the second taper portion 317 the flow path area gradually increases toward the downstream side.
  • the flow path area is substantially constant.
  • the channel area of the gas channel 3191 is also substantially constant, and the gas channel 3191 is connected to the gas mixing unit 316 of the nozzle channel 310.
  • the liquid that has flowed into the nozzle channel 310 from the liquid inlet 311 is accelerated by the throat portion 315 and the static pressure is lowered, and the pressure in the nozzle channel 310 is reduced in the throat portion 315 and the gas mixing portion 316.
  • the plasma-containing gas is sucked from the gas inlet 319, passes through the gas flow path 3191, flows into the gas mixing unit 316, and is mixed with the liquid to generate the mixed fluid 72 (see FIG. 1).
  • the mixed fluid 72 is decelerated at the second tapered portion 317 and the outlet portion 318 to increase the static pressure, and is ejected into the dissolution channel portion 32 via the mixed fluid ejection port 312.
  • the dissolution channel section 32 includes a first horizontal channel 321, a second horizontal channel 322, a third horizontal channel 323, and a fourth horizontal channel 324 that are stacked in the vertical direction. And a fifth horizontal flow path 325.
  • first horizontal flow path 321, the second horizontal flow path 322, the third horizontal flow path 323, the fourth horizontal flow path 324, and the fifth horizontal flow path 325 are collectively indicated, “horizontal flow path 321”. ⁇ 325 ".
  • the horizontal flow paths 321 to 325 are portions that form an internal space through which liquid flows.
  • the horizontal flow paths 321 to 325 are pipe lines extending in the horizontal direction, and the cross section perpendicular to the longitudinal direction of the horizontal flow paths 321 to 325 is substantially rectangular. In the present embodiment, the width of the horizontal flow paths 321 to 325 is about 40 mm.
  • the mixing nozzle 31 is attached to the upstream end of the first horizontal flow path 321 (that is, the left end in FIG. 1), and the mixed fluid 72 after being ejected from the mixing nozzle 31 is It flows toward the right side in FIG. 1 under a pressurized environment.
  • the mixed fluid 72 immediately after being ejected from the mixing nozzle 31 is ejected from above the liquid level of the mixed fluid 72 in the first horizontal flow path 321, and is downstream of the first horizontal flow path 321. It collides directly with the liquid surface before colliding with the wall surface (that is, the right wall surface in FIG. 1).
  • the length of the first horizontal flow path 321 is set to the center of the mixed fluid ejection port 312 (see FIG. 2) of the mixing nozzle 31. It is preferable to make it larger than 7.5 times the vertical distance between the lower surface of one horizontal flow path 321.
  • a part or the whole of the mixed fluid ejection port 312 of the mixing nozzle 31 may be positioned below the liquid level of the mixed fluid 72 in the first horizontal flow path 321.
  • the mixed fluid 72 immediately after being ejected from the mixing nozzle 31 directly collides with the mixed fluid 72 flowing in the first horizontal flow channel 321 in the first horizontal flow channel 321 as described above.
  • a substantially circular opening 321 a is provided on the lower surface of the downstream end portion of the first horizontal flow path 321, and the mixed fluid 72 flowing through the first horizontal flow path 321 is located below the first horizontal flow path 321. It falls to the 2nd horizontal flow path 322 located through the opening 321a.
  • the fluid flowing through the horizontal flow paths 321 to 325 is not necessarily in a gas-liquid mixed state, but is simply referred to as “mixed fluid 72” hereinafter.
  • the mixed fluid 72 that has dropped from the first horizontal flow path 321 flows from the right side to the left side in FIG. 1 in a pressurized environment, and the downstream end of the second horizontal flow path 322.
  • the mixed fluid 72 dropped from the second horizontal flow path 322 flows from the left side to the right side in FIG. It drops to a fourth horizontal flow path 324 located below the third horizontal flow path 323 through a substantially circular opening 323a provided on the lower surface of the first horizontal flow path.
  • the mixed fluid 72 includes a liquid layer containing bubbles and a gas (ie, plasma-containing gas) layer positioned above the liquid layer. It is divided into.
  • the mixed fluid 72 that has dropped from the third horizontal flow path 323 flows from the right side to the left side in FIG. 1 in a pressurized environment, and the downstream end of the fourth horizontal flow path 324. It flows into the fifth horizontal flow path 325 located below the fourth horizontal flow path 324 (that is, falls) through a substantially circular opening 324a provided on the lower surface of the first horizontal flow path.
  • the fifth horizontal flow path 325 unlike the first horizontal flow path 321 to the fourth horizontal flow path 324, there is no gas layer, and in the liquid filling the fifth horizontal flow path 325, In the vicinity of the upper surface of the five horizontal flow paths 325, there are few bubbles of a size that can be visually recognized.
  • the mixed fluid 72 flowing in from the fourth horizontal flow path 324 flows from the left side to the right side in FIG.
  • the horizontal flow paths 321 to 325 of the dissolution flow path section 32 flow down from top to bottom while repeating steps gradually (that is, the flow in the horizontal direction and the flow in the downward direction are reduced).
  • the gas is gradually dissolved in the liquid under pressure.
  • the concentration of the gas dissolved in the liquid is approximately equal to 60% to 90% of the (saturated) solubility of the gas under a pressurized environment.
  • dissolve in the liquid exists in the 5th horizontal flow path 325 as a bubble of the magnitude
  • the dissolution channel unit 32 further includes an excess gas separation unit 326 extending upward from the upper surface on the downstream side of the fifth horizontal channel 325, and the excess gas separation unit 326 is filled with the mixed fluid 72.
  • the cross section perpendicular to the vertical direction of the surplus gas separation part 326 is substantially rectangular, and the upper end of the surplus gas separation part 326 is opened to the atmosphere via a pressure adjustment throttle part 327.
  • the bubbles of the mixed fluid 72 flowing through the fifth horizontal flow path 325 rise in the surplus gas separation unit 326 and are released into the atmosphere.
  • the pressurized liquid 71 dissolves a gas that is about twice or more the gas (saturated) solubility under atmospheric pressure.
  • the liquid of the mixed fluid 72 that flows through the horizontal flow paths 321 to 325 in the dissolution flow path section 32 can also be regarded as the pressurized liquid 71 that is being generated.
  • the fine bubble generating device 1 further includes a regulating valve 61, a pressure sensor 62, and a valve control unit 63.
  • the adjustment valve 61 is provided in the pressurizing fluid channel 4 and adjusts the pressure of the pressurizing fluid 71 in the pressurizing fluid channel 4.
  • the pressure sensor 62 is disposed above the first horizontal flow path 321 and measures the pressure in the dissolution flow path section 32 of the pressurized liquid generating section 3.
  • An exhaust valve 64 is also provided above the first horizontal flow path 321.
  • the measured value of the pressure in the dissolution flow path portion 32 output from the pressure sensor 62 is set to a predetermined pressure (preferably 0.1 MPa to 0.45 MPa).
  • the regulating valve 61 is controlled by the valve control unit 63.
  • the valve control unit 63 controls the adjustment valve 61 based on the output from the pressure sensor 62. Thereby, even if the viscosity of the mixed fluid 72 changes due to a temperature change or the like, the pressure change in the dissolution flow path portion 32 is reduced.
  • the adjusting valve 61 may be manually operated.
  • the pressurizing liquid 71 guided from the dissolution channel portion 32 to the pressurizing liquid channel 4 flows into the fine bubble generating nozzle 2.
  • FIG. 3 is an enlarged sectional view showing the fine bubble generating nozzle 2.
  • the fine bubble generating nozzle 2 includes a pressurized liquid inlet 21 through which the pressurized liquid 71 flows from the connection pipe 4 and a pressurized liquid outlet 22 that opens toward the stored liquid 91.
  • the pressurized liquid inlet 21 and the pressurized liquid outlet 22 are each substantially circular, and the cross section of the nozzle flow path 20 from the pressurized liquid inlet 21 toward the pressurized liquid outlet 22 is also substantially circular.
  • the fine bubble generating nozzle 2 includes an introduction portion 23, a taper portion 24, and a throat portion 25 that are sequentially arranged from the pressurized liquid inlet 21 toward the pressurized liquid outlet 22.
  • the flow channel area is substantially constant at each position in the direction of the central axis J ⁇ b> 2 of the nozzle flow channel 20.
  • the flow path area gradually decreases in the direction in which the pressurized liquid 71 (see FIG. 1) flows (that is, toward the downstream side).
  • the inner surface of the tapered portion 24 is a part of a substantially conical surface with the central axis J2 of the nozzle channel 20 as the center.
  • the angle ⁇ formed by the inner surface of the tapered portion 24 is preferably 10 ° or more and 90 ° or less.
  • the throat part 25 connects the taper part 24 and the pressurized liquid ejection port 22.
  • the inner surface of the throat portion 25 is a substantially cylindrical surface, and the flow path area is substantially constant in the throat portion 25.
  • the diameter of the channel cross section in the throat 25 is the smallest in the nozzle channel 20, and the channel area of the throat 25 is the smallest in the nozzle channel 20.
  • the length of the throat 25 is preferably 1.1 to 10 times the diameter of the throat 25, and more preferably 1.5 to 2 times. In the nozzle channel 20, even if the channel area slightly changes in the throat portion 25, the entire portion having the smallest channel area is regarded as the throat portion 25.
  • the fine bubble generating nozzle 2 is also provided continuously to the throat portion 25 and encloses the periphery of the pressurizing liquid jet port 22 away from the pressurizing liquid jet port 22, and the end of the enlarging unit 27
  • An enlarged portion opening 28 provided in the portion is provided.
  • the flow path 29 between the pressurized liquid jet port 22 and the enlarged portion opening 28 is a flow path provided outside the pressurized liquid jet port 22 and is hereinafter referred to as an “external flow path 29”.
  • the channel cross section of the external channel 29 and the enlarged portion opening 28 are substantially circular, and the channel area of the external channel 29 is substantially constant.
  • the diameter of the external flow path 29 is larger than the diameter of the throat portion 25 (that is, the diameter of the pressurized liquid ejection port 22).
  • an annular surface between the edge of the inner peripheral surface of the enlarged portion 27 on the side of the pressurized liquid jet port 22 and the edge of the pressurized liquid jet port 22 is referred to as a “jet port end surface 221”.
  • the angle formed by the central axis J2 of the nozzle flow path 20 and the external flow path 29 and the jet end face 221 is about 90 °.
  • the diameter of the external channel 29 is 10 mm to 20 mm, and the length of the external channel 29 is approximately equal to the diameter of the external channel 29.
  • an external channel 29 that is a recess is formed at the end opposite to the pressurizing liquid inlet 21, and the pressurizing liquid that is an opening smaller than the bottom at the bottom of the recess. It can be understood that the spout 22 is formed.
  • the flow path area of the pressurized liquid 71 between the pressurized liquid ejection port 22 and the stored liquid 91 in the storage unit 5 is expanded.
  • the flow rate of the pressurizing liquid 71 in the throat 25 is preferably 10 m to 30 m per second, and in this embodiment is about 20 m per second.
  • the plasma-containing gas in the pressurizing liquid 71 becomes supersaturated and precipitates in the liquid as fine bubbles.
  • the fine bubbles pass through the external flow path 29 of the enlarged portion 27 together with the pressurized liquid 71 and diffuse into the stored liquid 91 in the stored section 5.
  • the fine bubbles are deposited while the pressurized liquid 71 passes through the external flow path 29.
  • the fine bubbles generated by the fine bubble generating nozzle 2 include so-called ultra fine bubbles having a diameter of less than 1 ⁇ m as described above.
  • the storage liquid 91 in the storage section 5, that is, a liquid containing ultrafine bubbles (hereinafter referred to as “UFB liquid”) is a pressurized liquid from the storage section 5 through the circulation channel 6. It is returned to the pump 33 of the generator 3 and circulates to the reservoir 5 via the pressurized liquid generator 3 and the pressurized liquid channel 4. Thereby, the density of the ultra fine bubble in UFB liquid increases.
  • a plasma-containing gas of about 0.2 L / min is supplied from the mixing nozzle 31 while circulating the UFB liquid at a rate of about 4 L (liter) / min for a predetermined time. As a result, the UFB liquid is generated.
  • the density of the ultra fine bubbles in the UFB liquid is about 3.58 ⁇ 10 8 pieces / cm 3 .
  • the diameter of the ultra fine bubbles in the UFB liquid is distributed in a range of less than 1 ⁇ m with a center of about 100 nm (nanometers). The density and diameter of the ultra fine bubble can be measured by NS500 of NanoSight Limited.
  • the UFB liquid generated by the fine bubble generating device 1 exhibits high bactericidal power when the density of ultrafine bubbles in the liquid is 1.0 ⁇ 10 8 pieces / cm 3 or more.
  • the UFB liquid having a density of ultra fine bubbles of 1.0 ⁇ 10 8 pieces / cm 3 or more is also referred to as “sterilizing liquid”. That is, the fine bubble generating apparatus 1 is a sterilizing liquid generating apparatus that generates a sterilizing liquid having high sterilizing power.
  • FIG. 4 is an experimental result showing the sterilizing power of the UFB liquid generated by the fine bubble generating device 1.
  • 990 ⁇ L of the UFB solution immediately after being generated by the microbubble generator 1 was added to 10 ⁇ L (microliter) of the bacterial solution containing E. coli, and the decrease in the number of bacteria was measured.
  • the horizontal axis in FIG. 4 indicates the generation time of the UFB liquid.
  • the circulation flow rate of the pressurized liquid 71 and the supply flow rate of the plasma-containing gas when generating the UFB liquid are the same as described above.
  • the liquid and gas used for the production of the UFB liquid are pure water and oxygen.
  • the vertical axis in FIG. 4 indicates the number of bacteria (CFU (colony forming unit) / mL).
  • the plot with a generation time of 0 minutes indicates the number of bacteria when 990 ⁇ L of pure water is added to 10 ⁇ L of the bacterial solution.
  • the number of bacteria is about 1.0 ⁇ 10 6 CFU / mL.
  • the density of the ultra fine bubbles in the UFB liquid when the generation time is 1 minute, 5 minutes, 10 minutes, and 30 minutes is 0.62 ⁇ 10 8 pieces / cm 3 , 1.71 ⁇ 10 8 pieces / cm 3 , and 1.31 ⁇ 10 respectively. 8 pieces / cm 3 , 3.58 ⁇ 10 8 pieces / cm 3 .
  • the production time of the UFB liquid is 1 minute (that is, when the density of ultra fine bubbles is 0.62 ⁇ 10 8 cells / cm 3 )
  • the number of bacteria is up to about 0.5 ⁇ 10 6 CFU / mL. Decrease.
  • the generation time of the UFB solution is 5 minutes or more, the number of bacteria decreases to about 0 CFU / mL. From these, as described above, it can be seen that the UFB liquid having an ultrafine bubble density of 1.0 ⁇ 10 8 particles / cm 3 or more in the liquid is a sterilizing liquid having a high sterilizing power.
  • the liquid and the gas used for generating the UFB liquid in the fine bubble generating apparatus 1 are pure water and air
  • the UFB liquid having a density of ultrafine bubbles in the liquid of 1.0 ⁇ 10 8 pieces / cm 3 or more is Experiments confirmed that the sterilizing solution had a high sterilizing power.
  • FIG. 5 is a diagram showing the results of an experiment to reduce the number of bacteria when the UFB solution generated by the microbubble generator 1 is left for a predetermined time and then added to the bacterial solution.
  • the experimental conditions are the same as the experiment shown in FIG. 4 except that the UFB solution is allowed to stand after generation.
  • generation time of UFB liquid is 30 minutes.
  • the liquid and gas used for generating the UFB liquid are pure water and oxygen.
  • the horizontal axis in FIG. 5 indicates the time for which the UFB solution is left, and the vertical axis indicates the number of bacteria.
  • the UFB solution with a standing time after generation of 20 minutes or less shows a high sterilizing power like the UFB solution immediately after generation.
  • FIG. 6 shows the experimental results showing the bactericidal power of the UFB liquid generated by the microbubble generator 1 against various bacteria.
  • FIG. 6 shows the bactericidal power of the UFB solution against each of the above-mentioned Escherichia coli, Pseudomonas aeruginosa, enterococci and S. aureus.
  • 990 ⁇ L of the UFB solution immediately after being generated by the microbubble generator 1 was added to 10 ⁇ L of the bacterial solution containing Escherichia coli, Pseudomonas aeruginosa, enterococci, and Staphylococcus aureus, and the decrease in the number of bacteria was measured. did.
  • the number of bacteria contained in 10 ⁇ L of the bacterial solution before the addition of the UFB solution is about 1.0 ⁇ 10 6 .
  • the circulation flow rate of the pressurized liquid 71 and the supply flow rate of the plasma-containing gas when generating the UFB liquid are the same as described above.
  • the liquid and gas used for the production of the UFB liquid are pure water and oxygen.
  • the generation time of the UFB liquid is 5 minutes, and the density of the ultra fine bubbles in the UFB liquid is 1.0 ⁇ 10 8 pieces / cm 3 or more.
  • the UFB solution is added to each bacterial solution immediately after being generated by the fine bubble generating device 1. That is, the above UFB solution for 0 minutes is added to each bacterial solution.
  • FIG. 6 shows the target bacteria, and the vertical axis shows the number of bacteria remaining after the addition of the UFB solution (CFU / mL).
  • FIG. 6 also shows the number of remaining bacteria when 990 ⁇ L of pure water is added to 10 ⁇ L of each bacterial solution described above.
  • the number of bacteria increases from 1.0 ⁇ 10 6 CFU / mL or only slightly decreases.
  • UFB solution is added, the number of bacteria decreases to about 0 to 1.0 ⁇ 10 1 CFU / mL.
  • the UFB solution having an ultrafine bubble density of 1.0 ⁇ 10 8 cells / cm 3 or more is various bacteria such as Escherichia coli, Pseudomonas aeruginosa, enterococci and Staphylococcus aureus. It can be seen that the sterilizing liquid has a high sterilizing power.
  • the fine bubble generating device 1 can easily generate and provide a sterilizing liquid having an ultrafine bubble density of 1.0 ⁇ 10 8 pieces / cm 3 or more formed by the plasma-containing gas. .
  • the sterilizing liquid generated by the microbubble generator 1 has a high sterilizing power against various bacteria for a predetermined time, and after the predetermined time has passed, the sterilizing power of the sterilizing liquid will increase over time. It decreases with it. For this reason, such as when the sterilizing liquid is applied to the skin, the sterilizing liquid exhibits a desired sterilizing effect, and after a relatively short period of time, it has no sterilizing power (or has reduced sterilizing power). It can prevent (or suppress) long-term irritation to the skin.
  • the fine bubble generating apparatus 1 various gases other than oxygen and air may be used for generating the sterilizing liquid. Moreover, in the fine bubble production
  • the generation nozzle 2 other various structures may be provided.

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Abstract

L'invention concerne un dispositif (1) générant des bulles de gaz minute contenant: une unité de génération de plasma (34) pour générer un gaz contenant du plasma, qui est un gaz qui contient du plasma, à partir d'un gaz; une buse de mélange (31), qui est une section de mélange pour mélanger le gaz contenant du plasma à partir de l'unité de génération de plasma (34) avec un liquide pour générer un fluide mixte ; et une unité (32) de canal de flux de dissolution, qui est une section de dissolution pour générer un liquide sous pression par pressurisation du fluide mixte à partir de la buse de mélange (31) pour pressuriser et dissoudre le gaz contenant du plasma dans le liquide et pour générer un liquide microbicide contenant 1,0 x 108/cm3 ou plus de bulles ultrafines, qui sont formées en utilisant le gaz contenant du plasma par libération du liquide sous pression. Le dispositif de génération de bulles de gaz minute (1) fournit un liquide microbicide qui a la capacité de tuer les microbes.
PCT/JP2014/079874 2013-11-18 2014-11-11 Dispositif générant un liquide microbicide WO2015072461A1 (fr)

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JP2020033294A (ja) * 2018-08-29 2020-03-05 学校法人 名城大学 酸素ラジカル活性化水溶液とその製造方法および農作物の生産方法
CN112742225A (zh) * 2019-10-31 2021-05-04 佳能株式会社 超细气泡生成装置和元件基板制造方法
US11877378B2 (en) 2021-10-08 2024-01-16 National Yang Ming Chiao Tung University Plasma fine bubble liquid generating apparatus

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US11492274B2 (en) 2020-05-28 2022-11-08 National Chiao Tung University Liquid treatment apparatus
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CN112742225A (zh) * 2019-10-31 2021-05-04 佳能株式会社 超细气泡生成装置和元件基板制造方法
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