Generation method of gas containing solution and generation system 100 of gas containing solution

Abstract

To provide a generation method of a gas containing solution which effectively utilizes a gas and generates a solution containing the gas in a highly efficient manner, and to provide a generation system of the gas containing solution.SOLUTION: A generation method of a gas containing solution according to one embodiment of the invention includes: an atomization step in which a liquid stored in a first container is atomized; a generation step in which a gas is placed in contact with the atomized liquid to generate droplets in which the gas is dissolved; a moving step in which the droplets in which the gas is dissolved are moved into a second container through a first passage, the droplets in which the gas is dissolved are separated, and the residual gas is moved into the first container through a second passage; and a recovery step in which the separated droplets are recovered.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for producing a gas-containing solution and a system for producing a gas-containing solution 100 manufacturing system. [Background technology]

[0002] Conventionally, gas-containing solutions have been produced by dissolving gas components in a liquid phase, centering on bubbling technology. In the aquaculture industry, a typical example is bubbling air into a tank to suppress a decrease in the dissolved oxygen concentration. However, unlike air, there are issues with bubbling when it comes to expensive, rare, or harmful gases, and improvements are needed.

[0003] Patent Document 1 discloses a technique for dissolving ozone in water by using bubbling via an ejector, and discloses a technique for reusing the ozone released into the gas phase in an ozone dissolution tank. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4933206 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the gas-containing solution described in Patent Document 1 employs an ejector for dissolving the gas, but the gas dissolution efficiency per unit area is low.

[0006] In view of the above problems, an object of the present invention is to provide a method and system for producing a gas-containing solution that effectively utilizes gas and produces a solution containing gas with high efficiency. [Means for solving the problem]

[0007] A method for generating a gas-containing solution according to one embodiment of the present invention includes a method for generating a gas-containing solution, the method comprising: an atomization step of atomizing a liquid stored in a first container; a generation step of generating droplets having dissolved gas by contacting a gas with the atomized liquid; a transfer step of transferring the droplets having dissolved gas into a second container via a first flow path, separating the droplets having dissolved gas, and transferring the remaining gas into the first container via the second flow path; and a recovery step of recovering the separated droplets having dissolved gas. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a method for producing a gas-containing solution and a system 100 for producing a gas-containing solution that effectively utilizes gas and produces a solution containing a gas with high efficiency. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram for explaining a production system for producing a gas-containing liquid by circulating a gas. [Diagram 2] FIG. 1 is a diagram for explaining a production system for producing an ozone-containing gas-containing liquid by circulating an ozone-containing gas. [Diagram 3] FIG. 1 is a diagram for explaining a production system for producing an ozone-containing gas-containing liquid by circulating an ozone-containing gas using a fractionating tube as a separation mechanism. [Figure 4] FIG. 2 is a diagram for explaining a production system for producing an ozone-containing gas-containing liquid by circulating an ozone-containing gas using beads as a separation mechanism. [Diagram 5] FIG. 13 is a diagram for explaining a production system for producing an ozone-containing gas-containing liquid by circulating an ozone-containing gas using a mesh-type ultrasonic unit as an atomization unit. [Figure 6] A manufacturing system that produces liquid containing ozone-containing gas by circulating ozone-containing gas using a liquid pump type spray in the atomization unit. [Figure 7] FIG. 1 is a diagram for explaining a production system for producing an ozone-containing gas-containing liquid by circulating an ozone-containing gas equipped with an active oxygen generation unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the present disclosure will be described. Note that the following embodiments are merely examples and are not intended to limit the ideas of the present disclosure more than necessary.

[0011] In the present invention, the fine droplets generated through the atomization process refer to droplets having an average diameter of 1 mm or less. Although there is no particular limitation on the atomization unit applied to the atomization process, a device used for piezoelectric atomization is a preferred embodiment.

[0012] Piezoelectric atomizing devices are broadly divided into two types. One is a throw-in type that is installed in liquid and turns the liquid near the gas-liquid interface into fine droplets. The other is a mesh type in which piezoelectric elements are arranged around a mesh plate and fine liquid is supplied from the mesh holes via a liquid supply medium. In the present invention, both the throw-in type and the mesh type are preferred embodiments. The liquid atomizing unit is not limited to the above, and an atomizing unit that sprays high-pressure liquid and gas from a fine hole nozzle using a pump is also a preferred embodiment. There is no particular limitation on the method of moving the droplets suspended in the gas phase in the moving process, and a blowing mechanism such as a blower fan or a diaphragm pump is a preferred embodiment. There is also no particular limitation on the mechanism for separating the droplets and the gas, but a preferred embodiment is a glass filter that has an irregular flow path cross-sectional area for the gas phase and has gas-liquid separating properties. By making the flow path cross-sectional area irregular, the cross-sectional shape of the flow path changes, and the flow speed and pressure of the gas flowing through the flow path can be changed, thereby performing gas-liquid separation.

[0013] The method for producing a gas-containing solution and the system for producing a gas-containing volume according to the present embodiment will be described below with reference to the drawings.

[0014] [First embodiment] FIG. 1 is a diagram showing an example of a functional configuration of a gas-containing solution generation system 100. The gas-containing solution generation system 100 has a first container 103 separated from the outside air and having an atomization unit 102 arranged therein to atomize a liquid 101 stored therein, and a second container 104 separated from the outside air. The gas-containing solution generation system 100 also has a first flow path 105 and a second flow path 106 that communicate between the first container 103 and the second container 104. The gas-containing solution generation system 100 includes a supply mechanism 107 that supplies gas to the liquid atomized by the atomization unit 102, and a blower mechanism 108 that moves the gas in the second flow path to the first container 103 via the second flow path 106. The gas-containing solution generation system 100 further includes a separation mechanism 109 that separates the gas from the liquid containing the atomized gas.

[0015] The gas-containing solution generating system 100 in this embodiment has the above-mentioned functional configuration, and generates droplets 110 in which the gas is dissolved by contacting the gas supplied by the gas supply mechanism 107 with the atomized liquid. Furthermore, the system is characterized in that the droplets in which the gas is dissolved are separated by the separation mechanism 109, the remaining gas is moved by the blower mechanism 108 through the second flow path 106 into the first container 103, and the separated droplets are collected through the second container 104. Here, the method of storing the liquid in the first container 103 may be such that the liquid is supplied to the first container 103 by connecting to an external liquid supply source through a supply pipe.

[0016] Here, by generating droplets with an average diameter of 1 mm or less by the atomization unit 102, it becomes possible to float in the gas phase containing gas for a long time, and furthermore, the ratio of the gas-liquid interface per droplet volume can be increased. Therefore, it becomes possible to dissolve the gas efficiently. In other words, it is possible to produce a solution containing gas with high efficiency. The atomization unit 102 generates fine bubbles of 20 μm or less in the droplets. Fine bubbles mean small bubbles (foam) of gas less than 100 μm. It has been reported that the inclusion of fine bubbles stabilizes the dissolution of gas, and this is also a preferred embodiment of the present invention. In particular, ultra-fine bubbles (UFB) with a diameter of 1 μm or less are a preferred embodiment because they do not rise in the liquid. Here, the UFB number ratio refers to the number ratio of ultra-fine bubbles in fine bubbles of 20 μm or less, and in this embodiment, the ratio of ultra-fine bubbles in fine bubbles of 20 μm or less is 99% or more. In addition, it is preferable that the particle size distribution of fine bubbles of 20 μm or less generated by the atomization unit 102 is 5 or less. If the diameter is larger than this, the rate at which the bubbles rise will increase, which may hinder the efficient use of gas. The particle size distribution is defined as the ratio (dw / dn) of the volume average particle size (dw) and the number average particle size (dn). The particle size, particle shape distribution, and concentration of fine bubbles were measured using a measuring device manufactured by Shimadzu Corporation (model number SALD-7500 nano). In this specification, fine bubbles (abbreviated as FB) refer to small bubbles (foam) made of gas. Furthermore, fine bubble-containing liquid refers to a liquid containing fine bubbles, which are small bubbles. The gas (gas) of fine bubbles may be composed of one or multiple components, and the ratio of the gas components can be adjusted by controlling the gas components in the recovery mechanism of the fine bubble-containing liquid. The desired gas components may exist as fine bubbles in the liquid, or may exist in a dissolved state in the liquid.

[0017] Furthermore, when an ultrasonic vibrator is used as the atomization unit 102, it is preferable that the thickness of the liquid above the vibrator to the liquid surface is 15 cm or less, depending on the output strength. If the thickness of the liquid to the liquid surface exceeds 15 cm, the strength of the ultrasonic irradiation for atomization increases, raising concerns about the effect on the liquid medium. If water is taken as a specific example of a liquid, this is because there is a concern that water molecules become hydroxyl radicals and react with, for example, nitrogen dissolved in the air, generating nitrogen oxide ions.

[0018] The gas supply mechanism 107 includes, for example, a gas cylinder 1071 that is a gas supply source, and a valve 1072 for adjusting the supply of gas provided from the gas supply source through a gas supply pipe into the gas-containing solution generation system 100. The gas supply mechanism may also include a pressure reducing pump for exhausting the gas.

[0019] The blower mechanism 108 moves the gas and the droplets in which the gas is dissolved through the first flow path 105 to the second container 104 .

[0020] The separation mechanism 109 separates the gas from the droplets in which the gas is dissolved. The gas-containing droplets are collected into the second container 104 by the blower mechanism 108 and the separation mechanism 109, while the gas is moved again into the first container 103 via the second flow path 108. This configuration allows the gas to be effectively utilized. The droplets in which the gas is dissolved, separated by the separation mechanism 109, can be collected using a cock or the like provided in the second container 104. The method of collecting the droplets in the second container 104 is not limited to this, and it is also a preferred embodiment to provide a collection port in the second container 104 and collect the droplets from the collection port into a collection container.

[0021] The supply mechanism 107 for supplying gas is, for example, a gas cylinder filled with gas.

[0022] When a gas with an increased oxygen concentration is used as the gas, an oxygen generator for increasing the oxygen concentration in the atmosphere may be used as the supply mechanism 107. When a gas with an increased ozone concentration is used as the gas, it is also a preferred embodiment to use the supply mechanism 107 ozone generation unit 120 or the like. There is no particular limitation on the separation mechanism 108 for separating the droplets and the gas, but a preferred embodiment is a glass filter that has an irregular cross-sectional area of ​​the gas phase flow path and has gas-liquid separation properties.

[0023] In order to produce a gas-containing solution containing dissolved gas with high efficiency by the gas-containing solution production system 100, it is preferable to set the average relative humidity of the droplet components in the system to an environment of 90% or more. If this average value is less than 90%, there is a concern that the amount of liquid recovered will be small due to the mist evaporating before the gas and liquid are separated.

[0024] The method for producing a gas-containing solution is not limited to the above system configuration, as long as it includes an atomization step, a production step, a transfer step, and a recovery step, which are performed as described below. The atomization step is a step of atomizing a liquid stored in a first container, and the production step is a step of contacting a gas with the atomized liquid to produce droplets in which the gas is dissolved. The transfer step is a step of transferring the droplets in which the gas is dissolved into a second container via a first flow path, separating the droplets in which the gas is dissolved, and transferring the remaining gas into the first container via a second flow path. The recovery step is a step of recovering the separated droplets in which the gas is dissolved.

[0025] In this embodiment, the gas-containing solution production system 100 is configured as described above, and thus it is possible to effectively utilize gas and highly efficiently produce a gas-containing solution.

[0026] [Second embodiment] A gas-containing solution generating system 100 containing ozone as the gas will be described with reference to FIG. 2. Note that the description of the same functional configuration as in the first embodiment will be omitted as appropriate. In this embodiment, an ozone generating unit 120 is provided instead of the gas supply mechanism in the first embodiment. The ozone generating unit 120 generates ozone in the gas-containing solution generating system 100 by irradiating oxygen with ultraviolet light.

[0027] Here, the ozone generating unit 120 is preferably an Xe excimer lamp or an ozone lamp that converts oxygen into ozonium using ultraviolet light. It is also a preferred embodiment to convert oxygen into ozonium using a discharge type ozone generating unit 120. It is also a preferred embodiment to provide an electrolysis type ozone generating unit 120 and incorporate ozone into water by electrolysis. It is preferable to provide the ozone generating unit 120 in the path until the atomized droplets are collected in the second container, for example, in the first flow path 105 or in the second container 104.

[0028] Furthermore, the gas-containing solution generating system can decompose ozone by irradiating ultraviolet light after generating the ozone-containing solution, thereby enabling waste ozone treatment.

[0029] Modifications of the first and second embodiments will be described below. The following modifications may be configured independently or in appropriate combination.

[0030] [Variation 1] A mechanism for separating the droplets in which the gas is dissolved from the gas phase will be described with reference to Figures 1, 3, and 4. There is no particular limitation on the separation mechanism. For example, in Figure 1, a glass filter that makes the cross-sectional area of ​​the gas phase flow path irregular and has gas-liquid separation properties is provided as a separation mechanism 109 constituting a gas-containing solution production system 100. In Figure 3, a fractionation tube 130 used in a distillation operation is provided as a separation mechanism 130 constituting a gas-containing solution production system. Note that the separation mechanism may be any mechanism that can separate the droplets in which the gas is dissolved from the gas phase, and a cooling tube used for reflux, or a fractionation tube provided with a filler that makes the cross-sectional area of ​​the gas phase flow path irregular and causes aggregation, as in the separation mechanism 140 in Figure 4, are preferred embodiments.

[0031] [Variation 2] An example of the atomization unit constituting the gas-containing solution generation system 100 will be described with reference to Figs. 1, 5, and 6. The atomization unit is not particularly limited, but a device used for piezoelectric atomization is a preferred embodiment. Piezoelectric atomization devices are broadly divided into two types. One is a throw-in type atomization unit 102 that is installed in liquid and turns the liquid near the gas-liquid interface into fine droplets, as in the atomization unit 102 constituting the gas-containing solution generation system 100 of Fig. 1. The other is a mesh type atomization unit 151 that supplies fine liquid from mesh holes through a liquid supply medium 152, as in the atomization unit 151 constituting the gas-containing solution generation system of Fig. 5, in which piezoelectric elements are arranged around a mesh plate. Both are preferred embodiments of the atomization unit constituting the present invention. In addition, as in the atomization unit of the gas-containing solution generation system of Fig. 6, an atomization unit that sprays high-pressure liquid or liquid and gas from a fine hole nozzle 161 by a pump 162 is also a preferred embodiment.

[0032] [Other variations] Furthermore, for the purpose of improving the gas-containing solution generation system 100 of the present invention, it is of course possible to add useful mechanisms, such as, for example, a stirring mechanism, a liquid level sensor, a liquid supply mechanism and a liquid drainage mechanism, an intake pump, an exhaust pump, a temperature control mechanism, and the like.

[0033] The liquid to be atomized by the atomization unit is not particularly limited to water, organic liquid, ionic liquid, etc., but water is preferred. There is no particular limit to the means for supplying the liquid to be atomized by ultrasonic irradiation. For example, when water is used as the liquid to be atomized, water may be supplied to the tank in a batch manner, water may be supplied through a pipe from a water pipe, or moisture in the air may be supplied as condensed water using a Peltier element or the like. If the liquid to be atomized by ultrasonic irradiation is shaken and stirred in a desired gas atmosphere, water with the desired gas dissolved therein is generated according to Henry's law. In an oxygen atmosphere, the water contains 45 ppm of oxygen. On the other hand, in the atmosphere, water with approximately 8.4 ppm of oxygen dissolved therein can be generated at room temperature.

[0034] Examples of water include purified water with a high purity (ultrapure water), tap water, and hard water. Water may also contain solutes that dissolve in these waters (electrolytes formed by dissociation of sodium chloride, silver nitrate, etc., free chlorine, amino acids, sugars, buffers, dyes, etc.), and may also contain dispersants (pigments, dispersants, cells, bubbles, emulsions, titanium oxide, emulsifiers, etc.).

[0035] A mixture of water and an organic liquid may also be used. The water-soluble organic solvent to be used is not particularly limited, but specific examples include the following: C1-4 alkyl alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, and tert-butyl alcohol; Amides such as N-methyl-2-pyrrolidone, 2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, N,N-dimethylformamide, and N,N-dimethylacetamide; Ketones or ketoalcohols such as acetone and diacetone alcohol; Cyclic ethers such as tetrahydrofuran and dioxane; Ethylene glycol, 1,2-propylene glycol, and 1,3-propylene glycol.

[0036] 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, and glycols such as 1,5-pentanediol, 1,2-hexanediol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, diethylene glycol, triethylene glycol, and thiodiglycol.

[0037] Ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, and lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, and triethylene glycol monobutyl ether.

[0038] Polyalkylene glycols such as polyethylene glycol and polypropylene glycol. Triols such as glycerin, 1,2,6-hexanetriol, and trimethylolpropane. The water-soluble organic solvents listed above may be used alone or in combination of two or more kinds.

[0039] Furthermore, as the gas dissolving liquid, it is also possible to use a liquid derived from a living body, specifically blood, cerebrospinal fluid, or the like.

[0040] The ultrasonic irradiation unit for atomization is not particularly limited, but a piezoelectric material is preferable. Piezoelectric materials are widely used in applications such as actuators, ultrasonic vibrators for irradiating ultrasonic waves, micro power sources, and high voltage generators. Many of the piezoelectric bodies used in these devices are materials known as PZT, which are oxides containing lead (Pb), zirconium (Zr), and titanium (Ti). For this reason, due to environmental concerns, development of lead-free piezoelectric materials is being promoted. Here, it is preferable that the lead content in the piezoelectric material is less than 1000 ppm, and materials that satisfy this content are defined as lead-free piezoelectric materials. Examples of lead-free piezoelectric materials include Ba-based perovskite oxides represented by the general formula BaM'O3. However, M' represents a mixed crystal of one type of element or two or more types of elements in a certain composition ratio, but it is necessary to satisfy that the charge of the general formula BaM'O3 is neutral. Examples of piezoelectric materials represented by BaM'O3 include BaTiO3, which has a tetragonal structure near room temperature.

[0041] As the ultrasonic irradiation unit, a commercially available unit can be used. Examples include, but are not limited to, the throw-in ultrasonic atomization unit IM1-24 manufactured by Seiko Giken Co., Ltd. and the cordless aroma diffuser MJ-CAD1 44486320 manufactured by MUJI Co., Ltd., which is marketed as a humidifier. A nebulizer is also a suitable example of a commercially available ultrasonic atomization generator. In addition, a mode in which the liquid that is the raw material of the fine bubble-containing liquid is separated from a liquid phase provided with a piezoelectric atomization unit that irradiates ultrasonic waves, and indirectly piezoelectric atomized, is also suitable. The liquid phase provided with the piezoelectric atomization unit that irradiates ultrasonic waves is not particularly limited, but is preferably a Quaba Mini manufactured by Kaijo Co., Ltd. In addition, the oscillator frequency is not particularly limited, but is preferably 1.6 MHz.

[0042] In the case of a spray-type atomizer, although there are no particular limitations, a preferred embodiment is one that comprises a unit having fine holes at the end of a hose through which liquid is pressurized and sent by a liquid pump.

[0043] In this study, an electric sprayer (product name: Ozone Nano Mist Sprayer) manufactured by HOLDWELL was used to produce microdroplets in the spray-only mode that does not generate ozone. During production, the 420 ml water storage tank was removed, and the liquid 101 before treatment was supplied from the water supply pipe 162 containing a liquid pump, which was installed in the first container 103, to produce microdroplets.

[0044] As an example of improving the acid resistance, alkali resistance, solvent resistance, and corrosion resistance (to ozone water, etc.), it is preferable to cover the liquid-contacting parts of the piezoelectric element with a fluorine-based resin, a titanium-based material, or a glass material such as quartz.

[0045] The humidity of the gas-containing solution generation system 100 will be described below. The humidity described in this specification is relative humidity, and an atmosphere in which the gas component to be obtained does not exist at all in the collection mechanism is set to 0%, and an atmosphere in which the gas component condenses in the collection mechanism is set to 100%. If the target liquid is water, it can be observed with a general-purpose hygrometer. However, if the target liquid is something other than water, it is necessary to confirm that the component of the liquid does not exist in the collection container at the start of production. In this confirmation, a method of confirming using a gas detector tube for the component of the target liquid is useful. After confirmation, the production of the gas-containing solution is started, and a state in which condensation occurs in the gas-containing solution generation system 100 is set to a state in which the relative humidity of the target liquid is 100%. Therefore, after this state, the state of 100% relative humidity will continue while atomization is generated. In this specification, the "average relative humidity" refers to the average relative humidity in the space of the gas-containing solution generation system 100 from the start of production of the gas-containing solution to the end of production.

[0046] Relative humidity was measured using a temperature and humidity data logger (model number KT-255F) manufactured by Fujita Electric Manufacturing Co., Ltd.

[0047] (Example) Hereinafter, the fine bubble-containing liquid produced by the gas-containing solution producing system 100 under various production conditions was examined, and the results are described.

[0048] A Shimadzu measuring device (model number SALD-7500 nano) was used to measure the particle size distribution of the fine bubbles in the fine bubble-containing liquid produced. For comparison, the raw liquid before fine bubbles were generated was used. The average particle size (converted into number), concentration (cumulative number of bubbles with a particle size of 20 um or less per ml) and particle size distribution (ratio (dw / dn) of the number-converted average molecular weight (dn) to the volume-converted average particle size (dw), minimum value is 1) of the fine bubbles contained in the fine bubble-containing liquid were measured.

[0049] A Pack Test made by Kyoritsu Chemical Research Institute was used to quantify the components in the liquid to be analyzed. A DO meter (HQ30D) made by Hack was used to measure the amount of dissolved oxygen. A LAQUA pH meter made by HORIBA was used to measure pH. In the experiment under atmospheric conditions, the gas atmosphere was set to 21% oxygen and 79% nitrogen, and the concentration of the dissolved gas components was calculated based on the measurement results of the oxygen concentration.

[0050] The evaluation items and evaluation criteria are as follows.

[0051] Productivity: The productivity was evaluated based on the ratio of the amount of liquid recovered per unit time to the amount of liquid recovered by the method of Example 1, according to the following criteria. A: 90% or more B: Between 80% and 90% C: 50% or more but less than 80% D: Less than 50%

[0052] Ozone-containing gas solubility: The dissolved ozone concentration was determined based on a color reaction caused by oxidative coupling with Trinder's reagent. When the upper limit of the concentration was reached, the concentration was calculated by diluting with ultrapure water. The determination was based on the following criteria. A...25ppm or more B: 10 ppm or more and less than 25 ppm C: 5 ppm or more and less than 10 ppm D Less than 5 ppm

[0053] Dissolved ozone concentration storage stability: The rate of change after 2 days at room temperature in a sealed container compared to the initial state was evaluated according to the following criteria. A: 90% or more B: Between 70% and 90% C: 50% or more but less than 70% D: Less than 50%

[0054] Gas solubility: For gases that do not contain ozone, oxygen gas and nitrogen gas were used, and the mixing ratio was adjusted to verify the gas dissolution efficiency. Quantitative analysis was performed using an oxygen gas concentration meter (JIKCO oxygen monitor JKO-25Ver.3) and a dissolved oxygen concentration meter (Hack fluorescent dissolved oxygen meter), and the concentration was adjusted with degassed water as necessary. Evaluation was based on the following criteria. A: 90% or more B: Between 70% and 90% C: 50% or more but less than 70% D: Less than 50%

[0055] Example 1 As the atomization unit, a piezoelectric atomization element (1.6 MHz) manufactured by Seiko Giken was used as the piezoelectric element of the atomization FB generator 101 for generating ultrasonic waves. The piezoelectric element was placed in a 500 ml beaker, and 300 ml of ultrapure water was poured into it. The height at which the piezoelectric element was placed was adjusted so that the distance between the gas-liquid interface and the piezoelectric element surface was 3.5 cm. An ozone gas-containing gas-containing solution was produced using the production system shown in Figure 2.

[0056] A chemical pump (LIQUIPORT (registered trademark) NF 1.100 RC manufactured by KNF) was used as the air blowing mechanism.

[0057] The ozone gas concentration in the gas-containing solution generation system 100 was adjusted to 150 ppm by intermittently lighting a Xe excimer lamp.

[0058] A glass filter with a filter hole diameter of 20 to 30 μm was used for the separation mechanism.

[0059] The average value of the relative humidity in the collection container during production (referred to as the average relative humidity) was 99%. In the following examples, unless otherwise specified, the average relative humidity is 80% or more.

[0060] Example 2 6, an electric sprayer (product name: Ozone Nano Mist Sprayer) manufactured by HOLDWELL was used as the atomizing unit for the spray type atomizing machine, and microdroplets were produced in a mode of spray only that does not generate ozone. An ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that the 420 ml capacity water storage tank was removed during production, and the liquid 101 before treatment was supplied from the water supply pipe 162 containing a liquid pump, which was installed in the first container 103, to produce microdroplets.

[0061] Example 3 A gas-containing solution was produced in the same manner as in Example 1, except that an oxygen cylinder was used as a supply mechanism for supplying gas with reference to FIG. 1, the oxygen concentration of the gas atmosphere in the system was adjusted to 50%, and ethanol was used as the liquid 101.

[0062] Example 4 A gas-containing solution was produced in the same manner as in Example 3, except that the gas atmosphere in the gas-containing solution production system was pure oxygen and the liquid in 101 was water.

[0063] Example 5 A gas-containing solution was produced in the same manner as in Example 3, except that the gas atmosphere in the gas-containing solution production system was pure nitrogen and the liquid in 101 was water.

[0064] Example 6 An ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that the height at which the piezoelectric element was installed was adjusted so that the distance between the gas-liquid interface and the surface of the piezoelectric element, which is the atomization unit, was 15 cm.

[0065] Example 7 An ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that the height at which the piezoelectric element was installed was adjusted so that the distance between the gas-liquid interface and the surface of the piezoelectric element, which is the atomization unit, was 16 cm.

[0066] Example 8 With reference to Fig. 7, an ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that an ultraviolet lamp 171 having a peak wavelength in the vicinity of 254 nm was provided. Conventionally, the ozone gas concentration in the system was measured 30 minutes after production and was about 120 ppm, but after turning on the ultraviolet lamp 171 for 30 minutes, the ozone gas concentration was 0.1 ppm, and the ozone was discharged.

[0067] Example 9 An ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that the gas-containing solution was intermittently atomized so that the relative humidity in the gas-containing solution production system was 85%.

[0068] Example 10 With reference to Fig. 5, except that a float-type mesh-type atomizer (Life on Products, Inc., Rechargeable Cordless Floating Humidifier PR-HF043) was used as the atomization generating unit, an ozone gas-containing gas-containing solution was produced in the same manner as in Example 1. Although the productivity was lower than that of Example 1, the result was that the specifications as an atomization unit were followed.

[0069] Comparative Example 1 An ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that no electricity was applied to the atomization unit.

[0070] Comparative Example 2 A desired gas-containing solution was produced in the same manner as in Example 4, except that no electricity was applied to the atomization unit.

[0071] Comparative Example 3 An ozone-containing gas-containing solution was produced in the same manner as in Example 1, except that no electricity was applied to the blower mechanism.

[0072] Comparative Example 4 A desired gas-containing solution was produced in the same manner as in Example 4, except that no electricity was applied to the blower mechanism.

[0073] Comparative Example 5 An ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that no separation mechanism was provided in the gas-containing solution production system in Example 1.

[0074] Comparative Example 6 In Example 1, the first and second flow paths were blocked, and the ozone gas-containing gas-containing solution was produced only in the first container.

[0075] Comparative Example 7 In Example 2, the nozzle part of the electric sprayer was disassembled, the fine-hole nozzle was removed, and the ozone gas-containing gas-containing solution was produced in the same manner as in Example 1, except that the water was sprayed into the first container as a water flow rather than as droplets.

[0076] Below, a table summarizing the above-mentioned Examples and Comparative Examples is provided.

[0077] [Table 1]

[0078] [Table 2] [Explanation of symbols]

[0079] 100 Gas-containing solution generating system 101 Liquid before processing 102 Atomization unit 103 First Container 104 Second Container 105 First Channel 106 Second Channel 107 Gas supply mechanism 108 Blower mechanism 109 Separation mechanism for separating gas and atomized liquid (glass filter) 110 Gas-containing solution 120 Gas supply mechanism (ozone generation unit) 130 Separation mechanism for separating gas and atomized liquid (fractionation tube) 140 Separation mechanism for separating gas and atomized liquid (filled with glass beads) 151 Atomization unit (mesh type) 152 Liquid supply medium 161 Atomization unit (spray) 162 Water supply pipe containing liquid transfer pump 171 Active oxygen generating unit

Claims

1. an atomization step of atomizing the liquid stored in the first container; a generating step of contacting a gas with an atomized liquid to generate droplets having the gas dissolved therein; a transferring step of transferring the droplets having the dissolved gas into a second container via a first flow path, separating the droplets having the dissolved gas, and transferring the remaining gas into the first container via a second flow path; a recovery step of recovering the separated droplets in which the gas is dissolved; A method for producing a gas-containing solution, comprising:

2. 2. The method for producing a gas-containing solution according to claim 1, wherein the atomization step atomizes the liquid by ultrasonic waves generated by vibration of an ultrasonic vibrator disposed in the first container.

3. The method for producing a gas-containing solution according to claim 1, wherein the liquid contains at least water.

4. 2. The method for producing a gas-containing solution according to claim 1, wherein the gas is a gas containing at least ozone.

5. 5. The method for producing a gas-containing solution according to claim 1, wherein the liquid with dissolved gas recovered by the recovery process contains fine bubbles of 20 μm or less in the liquid.

6. 6. The method for producing a gas-containing solution according to claim 5, wherein the proportion of ultrafine bubbles in the fine bubbles having a size of 20 μm or less is 99% or more.

7. The method for generating a gas-containing solution according to claim 6, characterized in that the ultra-fine bubbles have a ratio (dw / dn) of the volume average particle diameter (dw) to the number average particle diameter (dn) of bubbles of 20 μm or less of 5 or less.

8. 3. The method for producing a gas-containing solution according to claim 2, wherein a thickness of the liquid from the liquid surface to the ultrasonic transducer in the atomization step is 15 cm or less.

9. 2. The method for producing a gas-containing solution according to claim 1, wherein the producing step produces droplets in which the gas is dissolved in an environment having an average relative humidity of 90% or more.

10. 5. The method for producing a gas-containing solution according to claim 1, further comprising irradiating the solution with ultraviolet light in a subsequent step.

11. A first container is separated from outside air and has an atomization unit disposed therein for atomizing liquid stored therein; a second container isolated from the atmosphere; a first flow path and a second flow path communicating the first container and the second container; A supply mechanism for supplying a gas to the atomized liquid; a blowing mechanism that moves the gas in the second flow path to the first container through the second flow path; A separation mechanism for separating the gas from the atomized liquid, The gas supplied by the gas supply mechanism is brought into contact with the atomized liquid to generate droplets in which the gas is dissolved; Separating the droplets having the dissolved gas by the separation mechanism; A system for generating a gas-containing solution, characterized in that the remaining gas is moved into the first container through the second flow path by the blowing mechanism, and droplets in which the separated gas is dissolved are collected through the second container.

12. The system for generating a gas-containing solution according to claim 11, wherein the atomization unit includes an ultrasonic vibrator.

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