WO2019202940A1 - Ultrasonic atomizing separation device and humidity controller - Google Patents

Ultrasonic atomizing separation device and humidity controller Download PDF

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Publication number
WO2019202940A1
WO2019202940A1 PCT/JP2019/013666 JP2019013666W WO2019202940A1 WO 2019202940 A1 WO2019202940 A1 WO 2019202940A1 JP 2019013666 W JP2019013666 W JP 2019013666W WO 2019202940 A1 WO2019202940 A1 WO 2019202940A1
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Prior art keywords
liquid
atomization
ultrasonic
bubbles
bubble
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PCT/JP2019/013666
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French (fr)
Japanese (ja)
Inventor
井出　哲也
豪 鎌田
惇 佐久間
奨 越智
洋香 濱田
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シャープ株式会社
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Publication of WO2019202940A1 publication Critical patent/WO2019202940A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification

Definitions

  • the present invention relates to an ultrasonic atomization separation device and a humidity control device.
  • ultrasonic atomizers are conventionally used in technical fields such as humidifiers and separators.
  • a lot of mist-like droplets are generated from a liquid by irradiating the liquid with ultrasonic waves.
  • Patent Document 1 discloses an ultrasonic wave including a container that stores a liquid, an ultrasonic vibrator that is installed in the container so as to be in contact with the liquid, and an air supply mechanism that supplies air into the liquid.
  • An atomization device is disclosed.
  • the ultrasonic atomizer When an ultrasonic atomizer is used as a separation device, it is required that, for example, two components present in a liquid are separated with a desired degree of separation. Therefore, the ultrasonic atomizer needs to have a high atomization capability.
  • Patent Document 1 “In the present invention, a large amount of bubbles are generated in a liquid column by applying ultrasonic vibration to a liquid in which air is dissolved, and the bubbles can be ruptured to scatter droplets. The amount of atomization can be increased. " However, when bubbles are generated in the liquid, the bubbles inhibit the propagation of ultrasonic waves in the liquid depending on the size and amount of the bubbles. As a result, the atomization amount may rather decrease compared to the case where bubbles are not generated.
  • Patent Document 1 since it is not assumed that an ultrasonic atomizer is used as a separator, no consideration is given to the size of bubbles suitable for increasing the degree of separation.
  • an ultrasonic atomizing / separating apparatus stores a processing liquid and generates a liquid column by ultrasonic waves on the liquid surface of the processing liquid to thereby generate the processing liquid.
  • An atomizing tank that generates mist-like droplets, an ultrasonic generator that generates the ultrasonic waves, and a bubble generator that contains bubbles in the processing liquid, the bubble generator
  • the bubbles having a diameter larger than the diameter of the cavitation bubbles generated by resonance at the frequency of the ultrasonic wave generating portion and 1 atm and smaller than the thickness of the liquid column are contained in the processing liquid.
  • the mist-like droplets include film droplets and jet droplets
  • the bubble generating unit has the generation probability of the film droplets.
  • the bubbles having a size higher than the probability of jet droplet generation may be generated.
  • a humidity control apparatus includes a moisture absorption tank that brings a liquid moisture absorbent material containing a hygroscopic substance into contact with air, and absorbs at least a part of moisture contained in the air into the liquid moisture absorbent material. And an atomization regeneration unit that regenerates the liquid moisture absorbent by atomizing and removing at least a portion of moisture contained in the liquid moisture absorbent supplied from the moisture absorbent.
  • the section is constituted by the ultrasonic atomizing / separating device according to one aspect of the present invention, and the liquid hygroscopic material in which at least a part of the moisture is absorbed is used as the treatment liquid.
  • the humidity control apparatus may further include a humidity reducing unit that reduces the humidity inside the bubbles.
  • the humidity lowering section may be configured by the bubble generating section disposed inside the moisture absorption tank.
  • the moisture absorption tank includes a gas-liquid contact portion including a structure that increases a contact area between the liquid moisture absorbent and the air, and the bubble generating portion is It may be provided on the upstream side of the gas-liquid contact portion in the flow direction of the liquid hygroscopic material.
  • the humidity reduction unit is configured by the bubble generation unit provided in the atomization tank, and the gas supplied to the bubble generation unit is the atomization tank. It may be a carrier gas introduced inside.
  • an ultrasonic atomization separation apparatus that can obtain a desired degree of separation.
  • one aspect of the present invention can provide a humidity control apparatus that can efficiently regenerate the liquid moisture absorbent.
  • FIG. 1 is a schematic configuration diagram of the ultrasonic atomization separation apparatus according to the first embodiment.
  • the scale of the size may be varied depending on the component.
  • the ultrasonic atomization separation device 10 includes an atomization tank 11, an ultrasonic wave generator 12, a bubble generator 13, a first air supply pipe 14, an exhaust pipe 15, and a liquid supply pipe. 16, a drainage pipe 17, and blowers 18 and 19.
  • the atomization tank 11 has an internal space 11a for storing the processing liquid S, an air supply port 11b, an exhaust port 11c, a liquid supply port 11d, and a liquid discharge port 11e.
  • the atomization tank 11 is a container formed from materials, such as a metal and resin, for example, and a constituent material is not specifically limited.
  • the atomizing tank 11 stores the processing liquid S in the internal space 11 a and generates a liquid column C by ultrasonic waves on the liquid surface of the processing liquid S to generate droplets D of the processing liquid S.
  • the ultrasonic atomizing / separating apparatus 10 of the present embodiment assumes that a liquid having a viscosity higher than that of water is used as the processing liquid S.
  • the treatment liquid S include a glycerin aqueous solution, an ethylene glycol aqueous solution, a sodium polyacrylate aqueous solution, a polyethylene glycol aqueous solution, a triethylene glycol aqueous solution, a calcium chloride aqueous solution, a lithium chloride aqueous solution, or a mixture thereof.
  • the liquid has a property of absorbing moisture in the air.
  • a case where water and glycerin are separated from the treatment liquid S will be described by using, as an example, a glycerin aqueous solution in a state where moisture has been absorbed.
  • a liquid having a viscosity higher than that of water is referred to as a high viscosity liquid.
  • the ultrasonic generator 12 is provided in the atomization tank 11 and generates droplets D from the processing liquid S by irradiating the processing liquid S with ultrasonic waves.
  • the ultrasonic generator 12 includes an ultrasonic transducer 21 provided on the bottom plate of the atomization tank 11.
  • the number and arrangement of the ultrasonic transducers 21 are not particularly limited.
  • the ultrasonic waves are concentrated at specific locations on the liquid surface of the treatment liquid S by adjusting the generation conditions of the ultrasonic waves.
  • the liquid column C can be generated.
  • the droplets D are generated from an arbitrary position on the liquid surface, but are particularly generated from the liquid column C and the vicinity of the liquid column C.
  • the ultrasonic vibrator 21 is installed such that the vibration generation surface is inclined with respect to the bottom surface of the atomization tank 11. Thereby, the liquid column C is formed to be inclined with respect to a direction (vertical direction) perpendicular to the liquid surface of the processing liquid S. If the liquid column C is formed along a direction perpendicular to the liquid surface of the processing liquid S, the processing liquid S once raised falls inside the liquid column C, and thus the liquid column C is not formed stably. There is. In addition, if the ultrasonic transducer 21 is not installed to be inclined with respect to the liquid surface, the ultrasonic wave reflected by the liquid surface returns directly to the ultrasonic transducer 21, which may cause damage to the ultrasonic transducer 21. is there. By forming the liquid column C so as to be inclined with respect to the direction perpendicular to the liquid surface of the processing liquid S, the above problems can be improved.
  • the bubble generating unit 13 is provided in the atomization tank 11 and generates a large number of bubbles K in the processing liquid S.
  • the bubble generation unit 13 includes a bubble generator 23 provided at the bottom of the internal space 11 a of the atomization tank 11, a second supply pipe 24 connected to the bubble generator 23, and a second supply pipe. And a blower 25 provided at 24. Air is supplied to the bubble generator 23 through the second air supply pipe 24.
  • the specific form and number of the bubble generators 23 are not particularly limited. For example, a sub-milli bubble generator using bubbling can be used.
  • the first air supply pipe 14 is connected to the air supply port 11 b of the atomization tank 11.
  • a blower 18 is provided in the middle of the first air supply pipe 14.
  • the exhaust pipe 15 is connected to the exhaust port 11 c of the atomization tank 11.
  • a blower 19 is provided in the middle of the exhaust pipe 15.
  • the air containing the droplets D is exhausted from the internal space 11a through the exhaust pipe 15.
  • the first air supply pipe 14 since the first air supply pipe 14 is provided, it is preferable in that an air flow from the air supply port 11b of the atomization tank 11 toward the exhaust port 11c is easily formed, but the first air supply pipe 14 is not necessarily provided. It does not have to be done.
  • the liquid supply pipe 16 is connected to the liquid supply port 11 d of the atomization tank 11.
  • the processing liquid S is supplied to the internal space 11 a through the liquid supply pipe 16.
  • the drainage pipe 17 is connected to the drainage port 11 e of the atomization tank 11.
  • the processing liquid S is discharged from the internal space 11 a through the drain pipe 17.
  • the ultrasonic atomizing / separating apparatus 10 of the present embodiment includes the liquid supply pipe 16 and the drainage pipe 17 and has a configuration in which the processing liquid S is continuously processed.
  • the ultrasonic atomizing / separating apparatus may not necessarily include the liquid supply pipe and the drain pipe, and may have a configuration in which the processing liquid is batch-processed.
  • the droplets D generated from the treatment liquid S include droplets D having various particle diameters, for example, from nano order to micron order.
  • the particle size of the droplet D can be obtained by measurement using a light scattering method, measurement using an electrostatic particle size measuring device (EAA: Electrical Aerosol Analyzer), or the like.
  • the particle diameter of the droplet D generated from the processing liquid S depends on the frequency of the ultrasonic wave, the input power to the ultrasonic vibrator 21, etc., depending on the type of the processing liquid S. Further, the intermolecular force between water molecules and hygroscopic substance molecules such as glycerin is weaker than the intermolecular force between water molecules. Therefore, it is considered that the droplet D having a relatively small particle size does not easily contain a hygroscopic substance. On the other hand, it is considered that the droplet D having a relatively large particle size is likely to contain a hygroscopic substance. That is, when the particle size of the droplet D is different, the content ratio of the water and the hygroscopic substance in one droplet D is also different.
  • the present inventors generate liquid columns by irradiating various liquids with ultrasonic waves, and the liquid column and the vicinity thereof are observed by a high-speed camera. Observed.
  • the liquids used are three types: water, 80 wt% glycerin aqueous solution, and 80 wt% ethylene glycol aqueous solution.
  • a liquid hygroscopic material when the concentration of hygroscopic substances such as glycerin and ethylene glycol exceeds 80 wt%, the atomization efficiency is low, and when the concentration is 60 wt% or less, the degree of separation between water and the hygroscopic substance decreases. . Based on this finding, the concentration of the hygroscopic substance was set to 80 wt%.
  • the atomization efficiency is a value defined by the ratio of the atomization amount to the power supplied to the ultrasonic transducer.
  • FIG. 2 is a photograph observing the state of the liquid column of water.
  • FIG. 3 is a photograph of the liquid column of the glycerin aqueous solution observed.
  • FIG. 4 is a photograph of the appearance of the liquid column of the ethylene glycol aqueous solution.
  • mist-like droplets As shown in FIG. 2, in the case of water, a fine scale-like pattern that appears to be caused by capillary waves is generated on the surface of the liquid column. In addition, a large amount of mist-like droplets having a small particle diameter are generated from the surface of the liquid column. In the photograph, the portion of the liquid column that appears black as if wrinkled is near the surface of the liquid column is a mist-like droplet.
  • the particle size of one droplet is, for example, on the order of submicrons.
  • glycerin aqueous solution and ethylene glycol aqueous solution are less likely to generate droplets having a smaller particle diameter than water. This is presumed to be due to the fact that the glycerin aqueous solution and the ethylene glycol aqueous solution have a higher viscosity than water.
  • sea salt particles are particles in which minute droplets released from the sea surface into the atmosphere remain in the state of droplets or float in the atmosphere as dry solid particles.
  • FIG. 5 is a diagram for explaining a generation model of sea salt particles.
  • air is taken into the seawater by waves or the like and exists as bubbles.
  • the seawater film G1 on the upper surface of the bubbles K1 becomes thin and bursts.
  • the particle diameter of the droplet Df is, for example, about 0.06 ⁇ m to 0.15 ⁇ m.
  • the droplets generated by the rupture of the liquid film when the bubbles rise to the liquid level are referred to as film droplets Df.
  • the seawater on the side surface flows toward the bottom of the depression K2, and the flowing seawater G rises at the center of the depression K2. Thereafter, the tip of the rising seawater G is torn off, and several droplets Dj having a particle size larger than the film droplet Df are generated one after another.
  • the particle diameter of the droplet Dj is, for example, about 70 ⁇ m to 100 ⁇ m (1/15 to 1/10 of a bubble having a diameter of 1 mm).
  • the droplet generated from the rising of the liquid level after the bubble bursts is referred to as a jet droplet Dj.
  • FIG. 6 is a graph showing the relationship between the diameter of bubbles contained in seawater and the amount of droplets generated.
  • the horizontal axis of the graph is the bubble particle size, and the vertical axis is the amount of droplets generated, both of which are relative values.
  • a solid line graph indicated by a symbol F indicates a film droplet Df
  • a one-dot chain line graph indicated by a symbol J indicates a jet droplet Dj.
  • the generation amount of the film droplet Df and the generation amount of the jet droplet Dj also change. Specifically, for the film droplet Df, the amount of film droplet Df generated increases as the bubble diameter increases. On the other hand, with respect to the jet droplet Dj, contrary to the film droplet Df, the amount of jet droplet Dj generated decreases as the bubble diameter increases. Therefore, it is assumed that the occurrence probability of each of the film droplet Df and the jet droplet Dj can be controlled by the bubble diameter.
  • the present inventors Since the order of the particle size of the droplet in the generation model of sea salt particles is close to the order of the particle size of the droplet by the above-described high-speed camera observation, the present inventors have an appropriate diameter in the treatment liquid S. It was conceived that by introducing the bubbles K and actively generating the film droplets Df, it is possible to generate droplets having a small particle diameter even with a high viscosity liquid.
  • FIG. 7 is a schematic diagram showing the liquid column C2 in the ultrasonic atomization separation device of the comparative example.
  • FIG. 8 is a schematic diagram showing the liquid column C in the ultrasonic atomization separation device 10 of the present embodiment.
  • the comparative example is an ultrasonic atomizing / separating device that does not include a bubble generating unit. Both treatment liquids are assumed to be highly viscous liquids.
  • the ultrasonic atomizing / separating apparatus of the comparative example does not include a bubble generating unit, the processing liquid contains minute bubbles due to cavitation or the like. Therefore, as shown in FIG. 7, film droplets Df and jet droplets Dj are generated by microbubbles existing inside the liquid column C2. However, the frequency of occurrence is not so high.
  • the ultrasonic atomization separation device 10 of the present embodiment includes the bubble generation unit 13
  • the bubbles K can be contained in the processing liquid S.
  • many bubbles K also exist inside the liquid column C.
  • these bubbles K burst on the surface of the liquid column C, many film droplets Df are generated, and jet droplets Dj are also generated as the film droplets Df are generated.
  • the diameter of the bubbles K contained in the treatment liquid S is larger than the diameter of the cavitation bubbles generated by resonance at the frequency of the ultrasonic wave generation unit 12 and 1 atmosphere, and smaller than the thickness of the liquid column C. That is, even if the ultrasonic atomizing / separating apparatus 10 does not include the bubble generating unit 13, cavitation bubbles are generated by resonance of the ultrasonic generating unit 12 at the frequency of 1 atm when the treatment liquid S is irradiated with ultrasonic waves. Will occur. It has already been confirmed by observation with the high-speed camera that the cavitation bubbles cannot generate many film droplets Df and jet droplets Dj.
  • the bubble generation unit 13 it is necessary for the bubble generation unit 13 to generate bubbles K that are larger than the diameter of the cavitation bubbles generated by resonance at the frequency of the ultrasonic generation unit 12 and 1 atm and smaller than the thickness of the liquid column C. Furthermore, it is preferable that the bubble generation unit 13 generates bubbles K having a size such that the generation probability of the film droplet Df is higher than the generation probability of the jet droplet Dj.
  • the droplet D with a small particle diameter can be produced
  • Water can be separated from the treatment liquid S such as a glycerin aqueous solution with a high degree of separation.
  • FIG. 9 is a schematic configuration diagram of a humidity control apparatus according to the second embodiment.
  • the humidity control apparatus 40 includes a moisture absorption part 41, an atomization regeneration part 42, a first liquid moisture absorbent transport pipe 43, a second liquid moisture absorbent transport pipe 44, A first air supply pipe 45, a first air discharge pipe 46, a second air supply pipe 47, and a second air discharge pipe 48 are provided.
  • the humidity control apparatus 40 is installed indoors, and an example in the case of reducing indoor humidity using the humidity control apparatus 40 will be described below.
  • the atomization reproduction unit 42 is composed of the ultrasonic atomization separation device of the present invention.
  • the atomization regeneration unit 42 separates moisture from the liquid moisture absorbent S1 (treatment liquid) such as a glycol aqueous solution that has absorbed moisture in the air in the moisture absorbent 41, thereby desorbing moisture from the liquid moisture absorbent S1 and The hygroscopic material S1 is regenerated.
  • the moisture absorption part 41 includes a moisture absorption tank 50, a nozzle 51, and a gas-liquid contact part 52.
  • the hygroscopic part 41 causes the liquid hygroscopic material S1 to absorb at least a part of moisture contained in the air by bringing the liquid hygroscopic material S1 containing a hygroscopic substance into contact with indoor air. Although it is desirable for the moisture absorption part 41 to absorb as much water as possible into the liquid moisture absorbent S1, the liquid moisture absorbent S1 may absorb at least a part of moisture contained in the air. Inside the moisture absorption tank 50, the liquid moisture absorbent S1 is stored. The liquid hygroscopic material S1 will be described later.
  • a first air supply pipe 45, a first air discharge pipe 46, a first liquid hygroscopic material transport pipe 43 and a second liquid hygroscopic material transport pipe 44 are connected to the moisture absorption tank 50.
  • the indoor air is supplied to the internal space of the moisture absorption tank 50 through the first air supply pipe 45 by the blower 54.
  • the nozzle 51 is disposed in the upper part of the internal space of the moisture absorption tank 50.
  • the liquid hygroscopic material S1 returned to the hygroscopic unit 41 via the second liquid hygroscopic material transport pipe 44 flows down from the nozzle 51 to the gas-liquid contact unit 52,
  • the liquid contacts 52 come into contact with air while flowing down.
  • This type of contact between the liquid hygroscopic material S1 and air is generally referred to as a “flow-down method”. Note that the contact form between the liquid hygroscopic material S1 and air is not limited to the flow-down method, and other methods such as a bubbling method may be used.
  • the gas-liquid contact part 52 includes a structure 55 that increases the contact area between the liquid hygroscopic material S1 and air as compared with a configuration in which the liquid hygroscopic material S1 is simply allowed to flow into the space.
  • a structure 55 for example, a structure having a honeycomb structure is used. In addition, a structure having a large number of fins or uneven shapes may be used.
  • the liquid hygroscopic material S1 flows down from the upper part of this type of structure 55, the liquid hygroscopic material S1 flows down along, for example, the honeycomb structure, so that the amount of moisture absorbed by the liquid hygroscopic material S1 can be increased.
  • the air in the moisture absorption tank 50 forms an air flow from the first air supply pipe 45 toward the first air discharge pipe 46 and comes into contact with the liquid hygroscopic material S ⁇ b> 1 flowing down from the nozzle 51 in the gas-liquid contact portion 52. At this time, at least part of the moisture contained in the air is removed by being absorbed by the liquid moisture absorbent S1. In the moisture absorption part 41, since the air from which the water
  • the first air discharge pipe 46 is provided with a blower 56 for discharging air.
  • the liquid hygroscopic material S1 is a liquid that exhibits a property of absorbing moisture (hygroscopicity), and for example, a liquid that exhibits hygroscopicity under conditions of a temperature of 25 ° C., a relative humidity of 50%, and atmospheric pressure is preferable.
  • the liquid hygroscopic material S1 contains a hygroscopic substance to be described later. Further, the liquid hygroscopic material S1 may include a hygroscopic substance and a solvent. Examples of this type of solvent include a solvent that dissolves the hygroscopic substance or is miscible with the hygroscopic substance, for example, water.
  • the hygroscopic substance may be an organic material or an inorganic material.
  • Examples of the organic material used as the hygroscopic substance include known materials used as raw materials for dihydric or higher alcohols, ketones, organic solvents having an amide group, sugars, moisturizing cosmetics, and the like. Among them, known organic materials that are used as raw materials for dihydric or higher alcohols, organic solvents having an amide group, saccharides, moisturizing cosmetics, and the like because of their high hydrophilicity. Is mentioned.
  • divalent or higher alcohol examples include glycerin, propanediol, butanediol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol, and triethylene glycol.
  • organic solvent having an amide group examples include formamide and acetamide.
  • saccharide examples include sucrose, pullulan, glucose, xylol, fructose, mannitol, sorbitol and the like.
  • Examples of known materials used as raw materials for moisturizing cosmetics include 2-methacryloyloxyethyl phosphorylcholine (MPC), betaine, hyaluronic acid, collagen, and the like.
  • MPC 2-methacryloyloxyethyl phosphorylcholine
  • betaine betaine
  • hyaluronic acid collagen, and the like.
  • inorganic materials used as hygroscopic substances include calcium chloride, lithium chloride, magnesium chloride, potassium chloride, sodium chloride, zinc chloride, aluminum chloride, lithium bromide, calcium bromide, potassium bromide, sodium hydroxide, pyrrolidone.
  • examples thereof include sodium carboxylate.
  • the hygroscopic substance has high hydrophilicity, for example, when the hygroscopic substance material and water are mixed, the ratio of water molecules near the surface (liquid surface) of the liquid hygroscopic material S1 increases.
  • the droplet D is generated from the surface vicinity of liquid hygroscopic material S1, and a water
  • the ratio of the hygroscopic substance in the vicinity of the surface of the liquid hygroscopic material S1 is relatively small, it is preferable in that the loss of the hygroscopic substance in the atomization reproduction unit 42 can be suppressed.
  • the concentration of the hygroscopic substance contained in the liquid hygroscopic material S1 used for the treatment in the hygroscopic portion 41 is not particularly limited, but is preferably 40% by mass or more.
  • the concentration of the hygroscopic substance is 40% by mass or more, the liquid hygroscopic material S1 can efficiently absorb moisture.
  • the viscosity of the liquid hygroscopic material S1 is preferably 25 mPa ⁇ s or less. Thereby, in the atomization reproduction
  • the atomization device of the present invention that provides a high degree of separation without depending on the viscosity of the liquid to be atomized is provided as the atomization regenerating unit 42, the viscosity of the liquid moisture absorbent S1 is high. Even if it is high, water can be separated more efficiently than in the past.
  • the atomization reproduction unit 42 is constituted by the ultrasonic atomization separation device of the present invention.
  • the bubble generation unit 13 is provided in the atomization tank 11, whereas in the present embodiment, the bubble generation unit 13 is in the moisture absorption tank 50. Is provided. Therefore, bubbles K are contained in the liquid moisture absorbent S1 stored in the lower part of the moisture absorption tank 50.
  • the bubble generating unit 13 of the present embodiment also functions as a humidity reducing unit 58 that reduces the humidity inside the bubble K (air in the bubble K).
  • the humidity control apparatus 40 according to the present embodiment further includes a humidity reduction unit 58 that reduces the humidity inside the bubble K, and the humidity reduction unit 58 is the bubble generation unit 13 disposed inside the moisture absorption tank 50. It is configured.
  • the second air supply pipe 24 branched from the first air supply pipe 45 is connected to the bubble generator 23.
  • the indoor air that is the subject of humidity adjustment is also supplied to the bubble generator 23 and becomes bubbles in the liquid hygroscopic material S1.
  • gas-liquid contact by bubbling occurs even inside the stored liquid hygroscopic material S1, and moisture in the bubbles supplied from the bubble generator 23 is absorbed by the liquid hygroscopic material S1. Thereby, the humidity inside the bubble K falls.
  • the hygroscopic part 41 and the atomization regeneration part 42 are connected by a first liquid hygroscopic material transport pipe 43 and a second liquid hygroscopic material transport pipe 44 that constitute a circulation channel of the liquid hygroscopic material S1.
  • a pump 60 for circulating the liquid hygroscopic material S1 is provided in the middle of the second liquid hygroscopic material transport pipe 44.
  • the first liquid hygroscopic material transport pipe 43 transports the liquid hygroscopic material S1 in which at least a part of moisture has been absorbed from the hygroscopic part 41 to the atomization regeneration part 42. At this time, the liquid hygroscopic material S1 to be transported already contains bubbles.
  • One end of the first liquid hygroscopic material transport pipe 43 is connected to the lower part of the hygroscopic tank 50.
  • the connection location of the first liquid absorbent material transport pipe 43 in the moisture absorbent tank 50 is located below the liquid level of the liquid absorbent material S 1 in the moisture absorbent tank 50.
  • the other end of the first liquid hygroscopic material transport pipe 43 is connected to the lower portion of the atomization tank 11.
  • the connection location of the first liquid absorbent material transport pipe 43 in the atomization tank 11 is located below the liquid surface of the liquid absorbent material S1 in the atomization tank 11.
  • the second liquid hygroscopic material transport pipe 44 transports the liquid hygroscopic material S1 regenerated by removing moisture from the atomization regenerating unit 42 to the hygroscopic unit 41.
  • One end of the second liquid hygroscopic material transport pipe 44 is connected to the lower part of the atomization tank 11.
  • the connection location of the second liquid hygroscopic material transport pipe 44 in the atomization tank 11 is located below the liquid level of the liquid hygroscopic material S1 in the atomization tank 11.
  • the other end of the second liquid hygroscopic material transport pipe 44 is connected to the upper portion of the hygroscopic tank 50.
  • the connection location of the second liquid absorbent material transport pipe 44 in the moisture absorbent tank 50 is located above the liquid surface of the liquid absorbent material S1 in the moisture absorbent tank 50 and is connected to the nozzle 51 described above.
  • the humidity control apparatus 40 of this embodiment since the liquid hygroscopic material S1 is regenerated in the atomization regenerating unit 42, the moisture absorption performance of the liquid hygroscopic material S1 can be enhanced, and moisture separation in the atomizing regenerating unit 42 is possible. Since the degree is high, the atomization reproduction performance can be improved. Thereby, the energy saving of the humidity control apparatus 40 and the improvement of a processing speed can be aimed at.
  • the bubble K is already contained in the liquid absorbent material S1. Is contained.
  • the liquid hygroscopic material S1 has a high viscosity, the water vapor in the bubbles K is absorbed while the liquid hygroscopic material S1 is transported to the atomization tank 11, and the humidity inside the bubbles K decreases. Therefore, the introduction of the bubbles K having a reduced humidity can improve the atomization efficiency without reducing the atomization regeneration efficiency.
  • FIG. 10 is a schematic configuration diagram of a humidity control apparatus according to the third embodiment. 10, the same code
  • the bubble generation unit 13 is provided in a liquid reservoir 50 a provided in the upper part of the moisture absorption tank 50 of the moisture absorption unit 71.
  • the bubble generating unit 13 is provided on the upstream side of the gas-liquid contact unit 52 in the flow direction of the liquid hygroscopic material S1.
  • the nozzle 51 is provided below the liquid reservoir 50a. Therefore, in the present embodiment, the liquid hygroscopic material S ⁇ b> 1 containing the bubbles K flows down from the nozzle 51 toward the gas-liquid contact portion 52.
  • the bubble generating unit 13 and the nozzle 51 may be integrated.
  • Other configurations of the humidity control apparatus 70 are the same as those in the second embodiment.
  • the moisture absorption performance of the liquid moisture absorbent S1 can be enhanced and the atomization regeneration performance can be improved as in the second embodiment. Thereby, the energy saving of the humidity control apparatus 70 and the improvement of a processing speed can be aimed at.
  • the liquid hygroscopic material S1 including the bubbles K adheres to the surface of the structure 55 that constitutes the gas-liquid contact portion 52, so that in the gas-liquid contact portion 52, compared to the second embodiment. Apparent gas-liquid contact area increases. Thereby, moisture absorption performance can be improved.
  • FIG. 11 is a schematic configuration diagram of a humidity control apparatus according to the fourth embodiment.
  • the same components as those in FIG. 9 of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the bubble generation unit 13 is provided in the lower part of the atomization tank 11 of the atomization regeneration unit 82.
  • the bubble generating unit 13 of the present embodiment functions as a humidity reducing unit 58 that reduces the humidity inside the bubble K (air in the bubble K).
  • the humidity control apparatus 80 according to the present embodiment further includes a humidity reducing unit 58 that reduces the humidity inside the bubble K, and the humidity reducing unit 58 is disposed in the atomizing tank 11. It is comprised with the bubble generation part 13 containing.
  • the moisture absorption part 81 is configured to include a normal moisture absorption tank 50.
  • a second air supply pipe 24 branched from a second air supply pipe 47 that supplies air to the atomization tank 11 is connected to the bubble generator 23.
  • air as a carrier gas for transporting the droplets D inside the atomization tank 11 is also supplied to the bubble generator 23 to become bubbles K inside the liquid hygroscopic material S1.
  • the other structure of the humidity control apparatus 80 is the same as that of 2nd Embodiment.
  • the moisture absorption performance of the liquid moisture absorbent S1 can be enhanced and the atomization regeneration performance can be improved as in the second embodiment. Thereby, the energy saving of the humidity control apparatus 80 and the improvement of a processing speed can be aimed at.
  • the bubbles K having a high temperature and a low relative humidity can be introduced into the liquid moisture absorbent S1.
  • the condition that the equilibrium vapor pressure inside the bubble K that has reached the equilibrium temperature by the heat exchange between the liquid moisture absorbent S1 and the bubbles K in the atomization tank 11 is lower than the equilibrium vapor pressure of the regenerated liquid moisture absorbent S1.
  • the humidity control apparatus of the present invention may have not only a humidity adjustment function but also a temperature adjustment function.
  • the present invention can be used for an ultrasonic atomization separation device and a humidity control device.

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Abstract

Provided is an ultrasonic atomizing separation device capable of achieving a prescribed degree of separation. This ultrasonic atomizing separation device comprises: an atomization tank which stores a treatment solution, and generates a liquid column using ultrasonic waves on the liquid surface of the treatment solution to generate atomized droplets from the treatment solution; an ultrasonic wave generator which generates ultrasonic waves; and a bubble generator which incorporates bubbles in the treatment solution. The bubble generator incorporates, in the treatment solution, bubbles which have a diameter that is larger than the diameter of cavitation bubbles generated by resonance in the frequency of the ultrasonic wave generator and at 1 atmospheric pressure, and that is smaller than the thickness of the liquid column.

Description

超音波霧化分離装置および調湿装置Ultrasonic atomization separation device and humidity control device
　本発明は、超音波霧化分離装置および調湿装置に関する。
　本願は、２０１８年４月２０日に、日本に出願された特願２０１８－０８１４７７に優先権を主張し、その内容をここに援用する。 The present invention relates to an ultrasonic atomization separation device and a humidity control device.
This application claims priority to Japanese Patent Application No. 2018-081477 filed in Japan on April 20, 2018, the contents of which are incorporated herein by reference.
　例えば加湿装置、分離装置などの技術分野において、超音波霧化装置が従来から使用されている。超音波霧化装置では、液体に超音波を照射することによって液体から霧状の多数の液滴を発生させる。 For example, ultrasonic atomizers are conventionally used in technical fields such as humidifiers and separators. In an ultrasonic atomizer, a lot of mist-like droplets are generated from a liquid by irradiating the liquid with ultrasonic waves.
　例えば下記の特許文献１には、液体を貯留する容器と、液体に接触するように容器に設置された超音波振動子と、液体中に空気を供給する空気供給機構と、を備えた超音波霧化装置が開示されている。 For example, the following Patent Document 1 discloses an ultrasonic wave including a container that stores a liquid, an ultrasonic vibrator that is installed in the container so as to be in contact with the liquid, and an air supply mechanism that supplies air into the liquid. An atomization device is disclosed.
特開２０１６－１８５５０６号公報JP 2016-185506 A
　超音波霧化装置を分離装置として用いる場合、例えば液体中に存在する２つの成分同士が所望の分離度をもって分離されることが求められる。そのために、超音波霧化装置は、高い霧化能力を有している必要がある。 When an ultrasonic atomizer is used as a separation device, it is required that, for example, two components present in a liquid are separated with a desired degree of separation. Therefore, the ultrasonic atomizer needs to have a high atomization capability.
　特許文献１には、「本発明では、空気を溶解させた液体に超音波振動を加えることによって液柱内に大量の気泡を発生させ、気泡を破裂させて液滴を飛散させることができ、霧化量を増大させることができる」と記載されている。しかしながら、液体に気泡を発生させる場合、気泡のサイズや量によっては、気泡が液体内での超音波の伝播を阻害する。その結果、気泡を発生させない場合に比べて、霧化量がむしろ減少することがある。 In Patent Document 1, “In the present invention, a large amount of bubbles are generated in a liquid column by applying ultrasonic vibration to a liquid in which air is dissolved, and the bubbles can be ruptured to scatter droplets. The amount of atomization can be increased. " However, when bubbles are generated in the liquid, the bubbles inhibit the propagation of ultrasonic waves in the liquid depending on the size and amount of the bubbles. As a result, the atomization amount may rather decrease compared to the case where bubbles are not generated.
　さらに、特許文献１では、超音波霧化装置を分離装置として用いることを想定していないため、分離度を高めるために好適な気泡のサイズ等については、何ら考慮されていない。 Furthermore, in Patent Document 1, since it is not assumed that an ultrasonic atomizer is used as a separator, no consideration is given to the size of bubbles suitable for increasing the degree of separation.
　本発明の一つの態様は、上記の課題を解決するためになされたものであって、所望の分離度が得られる超音波霧化分離装置を提供することを目的の一つとする。また、本発明の一つの態様は、上記の超音波霧化分離装置を備え、液体吸湿材を効率的に再生することができる調湿装置を提供することを目的の一つとする。 One aspect of the present invention has been made to solve the above-described problems, and an object thereof is to provide an ultrasonic atomization separation apparatus that can obtain a desired degree of separation. Another aspect of the present invention is to provide a humidity control apparatus that includes the above-described ultrasonic atomization separation apparatus and can efficiently regenerate the liquid moisture absorbent.
　上記の目的を達成するために、本発明の一つの態様の超音波霧化分離装置は、処理液を貯留するとともに、前記処理液の液面に超音波による液柱を発生させて前記処理液の霧状液滴を発生させる霧化槽と、前記超音波を発生させる超音波発生部と、前記処理液の中に気泡を含有させる気泡発生部と、を備え、前記気泡発生部は、前記超音波発生部の周波数、１気圧での共振により発生するキャビテーション気泡の径よりも大きく、前記液柱の太さよりも小さい径を有する前記気泡を前記処理液の中に含有させる。 In order to achieve the above object, an ultrasonic atomizing / separating apparatus according to one aspect of the present invention stores a processing liquid and generates a liquid column by ultrasonic waves on the liquid surface of the processing liquid to thereby generate the processing liquid. An atomizing tank that generates mist-like droplets, an ultrasonic generator that generates the ultrasonic waves, and a bubble generator that contains bubbles in the processing liquid, the bubble generator The bubbles having a diameter larger than the diameter of the cavitation bubbles generated by resonance at the frequency of the ultrasonic wave generating portion and 1 atm and smaller than the thickness of the liquid column are contained in the processing liquid.
　本発明の一つの態様の超音波霧化分離装置において、前記霧状液滴は、フィルム液滴とジェット液滴とを含んでおり、前記気泡発生部は、前記フィルム液滴の発生確率が前記ジェット液滴の発生確率よりも高くなるサイズの前記気泡を発生させてもよい。 In the ultrasonic atomizing / separating device according to one aspect of the present invention, the mist-like droplets include film droplets and jet droplets, and the bubble generating unit has the generation probability of the film droplets. The bubbles having a size higher than the probability of jet droplet generation may be generated.
　本発明の一つの態様の調湿装置は、吸湿性物質を含む液体吸湿材と空気とを接触させる吸湿槽を備え、前記空気に含まれる水分の少なくとも一部を前記液体吸湿材に吸収させる吸湿部と、前記吸湿部から供給された前記液体吸湿材に含まれる水分の少なくとも一部を霧化し、除去することによって前記液体吸湿材を再生する霧化再生部と、を備え、前記霧化再生部は、本発明の一つの態様の超音波霧化分離装置から構成され、前記処理液として、前記水分の少なくとも一部が吸収された前記液体吸湿材が用いられる。 A humidity control apparatus according to one aspect of the present invention includes a moisture absorption tank that brings a liquid moisture absorbent material containing a hygroscopic substance into contact with air, and absorbs at least a part of moisture contained in the air into the liquid moisture absorbent material. And an atomization regeneration unit that regenerates the liquid moisture absorbent by atomizing and removing at least a portion of moisture contained in the liquid moisture absorbent supplied from the moisture absorbent. The section is constituted by the ultrasonic atomizing / separating device according to one aspect of the present invention, and the liquid hygroscopic material in which at least a part of the moisture is absorbed is used as the treatment liquid.
　本発明の一つの態様の調湿装置は、前記気泡の内部の湿度を低下させる湿度低下部をさらに備えていてもよい。 The humidity control apparatus according to one aspect of the present invention may further include a humidity reducing unit that reduces the humidity inside the bubbles.
　本発明の一つの態様の調湿装置において、前記湿度低下部は、前記吸湿槽の内部に配置された前記気泡発生部で構成されていてもよい。 In the humidity control apparatus according to one aspect of the present invention, the humidity lowering section may be configured by the bubble generating section disposed inside the moisture absorption tank.
　本発明の一つの態様の調湿装置において、前記吸湿槽は、前記液体吸湿材と前記空気との接触面積を増大させる構造体を含む気液接触部を備えており、前記気泡発生部は、前記液体吸湿材の流れ方向において前記気液接触部の上流側に設けられていてもよい。 In the humidity control apparatus according to one aspect of the present invention, the moisture absorption tank includes a gas-liquid contact portion including a structure that increases a contact area between the liquid moisture absorbent and the air, and the bubble generating portion is It may be provided on the upstream side of the gas-liquid contact portion in the flow direction of the liquid hygroscopic material.
　本発明の一つの態様の調湿装置において、前記湿度低下部は、前記霧化槽に設けられた前記気泡発生部で構成され、前記気泡発生部に供給される気体は、前記霧化槽の内部に導入されるキャリアガスであってもよい。 In the humidity control apparatus according to one aspect of the present invention, the humidity reduction unit is configured by the bubble generation unit provided in the atomization tank, and the gas supplied to the bubble generation unit is the atomization tank. It may be a carrier gas introduced inside.
　本発明の一つの態様によれば、所望の分離度が得られる超音波霧化分離装置を提供することができる。また、本発明の一つの態様は、液体吸湿材を効率的に再生することが可能な調湿装置を提供することができる。 According to one aspect of the present invention, it is possible to provide an ultrasonic atomization separation apparatus that can obtain a desired degree of separation. Moreover, one aspect of the present invention can provide a humidity control apparatus that can efficiently regenerate the liquid moisture absorbent.
第１実施形態の超音波霧化分離装置の概略構成図である。It is a schematic block diagram of the ultrasonic atomization separation apparatus of 1st Embodiment. ハイスピードカメラを用いて水の液柱の様子を観察した写真である。It is the photograph which observed the state of the liquid column of water using the high speed camera. ハイスピードカメラを用いてグリセリン水溶液の液柱の様子を観察した写真である。It is the photograph which observed the mode of the liquid column of glycerin aqueous solution using the high speed camera. ハイスピードカメラを用いてエチレングリコール水溶液の液柱の様子を観察した写真である。It is the photograph which observed the mode of the liquid column of ethylene glycol aqueous solution using the high speed camera. 海塩粒子の生成モデルを示す図である。It is a figure which shows the production | generation model of a sea salt particle. 海水中の気泡の径と液滴の発生量との関係を示すグラフである。It is a graph which shows the relationship between the diameter of the bubble in seawater, and the generation amount of a droplet. 比較例の超音波霧化分離装置における液柱を示す模式図である。It is a schematic diagram which shows the liquid column in the ultrasonic atomization separation apparatus of a comparative example. 本実施形態の超音波霧化分離装置における液柱を示す模式図である。It is a schematic diagram which shows the liquid column in the ultrasonic atomization separation apparatus of this embodiment. 第２実施形態の調湿装置の概略構成図である。It is a schematic block diagram of the humidity control apparatus of 2nd Embodiment. 第２実施形態の調湿装置の概略構成図である。It is a schematic block diagram of the humidity control apparatus of 2nd Embodiment. 第３実施形態の調湿装置の概略構成図である。It is a schematic block diagram of the humidity control apparatus of 3rd Embodiment.
［第１実施形態］
　以下、本発明の第１実施形態について、図１～図８を用いて説明する。
　図１は、第１実施形態の超音波霧化分離装置の概略構成図である。
　なお、以下の各図面においては各構成要素を見やすくするため、構成要素によって寸法の縮尺を異ならせて示すことがある。 [First Embodiment]
A first embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a schematic configuration diagram of the ultrasonic atomization separation apparatus according to the first embodiment.
In the following drawings, in order to make each component easy to see, the scale of the size may be varied depending on the component.
　図１に示すように、超音波霧化分離装置１０は、霧化槽１１と、超音波発生部１２と、気泡発生部１３と、第１給気管１４と、排気管１５と、給液管１６と、排液管１７と、ブロア１８，１９と、を備えている。 As shown in FIG. 1, the ultrasonic atomization separation device 10 includes an atomization tank 11, an ultrasonic wave generator 12, a bubble generator 13, a first air supply pipe 14, an exhaust pipe 15, and a liquid supply pipe. 16, a drainage pipe 17, and blowers 18 and 19.
　霧化槽１１は、処理液Ｓを貯留する内部空間１１ａと、給気口１１ｂと、排気口１１ｃと、給液口１１ｄと、排液口１１ｅと、を有している。霧化槽１１は、例えば金属、樹脂等の材料から形成された容器であり、構成材料は特に限定されない。霧化槽１１は、内部空間１１ａにおいて、処理液Ｓを貯留するとともに、処理液Ｓの液面に超音波による液柱Ｃを発生させて処理液Ｓの液滴Ｄを発生させる。 The atomization tank 11 has an internal space 11a for storing the processing liquid S, an air supply port 11b, an exhaust port 11c, a liquid supply port 11d, and a liquid discharge port 11e. The atomization tank 11 is a container formed from materials, such as a metal and resin, for example, and a constituent material is not specifically limited. The atomizing tank 11 stores the processing liquid S in the internal space 11 a and generates a liquid column C by ultrasonic waves on the liquid surface of the processing liquid S to generate droplets D of the processing liquid S.
　本実施形態の超音波霧化分離装置１０は、処理液Ｓとして、水の粘度よりも高い粘度を有する液体を用いることを想定している。処理液Ｓの例として、グリセリン水溶液、エチレングリコール水溶液、ポリアクリル酸ナトリウム水溶液、ポリエチレングリコール水溶液、トリエチレングリコール水溶液、塩化カルシウム水溶液、塩化リチウム水溶液、もしくはこれらの混合液などが挙げられる。 The ultrasonic atomizing / separating apparatus 10 of the present embodiment assumes that a liquid having a viscosity higher than that of water is used as the processing liquid S. Examples of the treatment liquid S include a glycerin aqueous solution, an ethylene glycol aqueous solution, a sodium polyacrylate aqueous solution, a polyethylene glycol aqueous solution, a triethylene glycol aqueous solution, a calcium chloride aqueous solution, a lithium chloride aqueous solution, or a mixture thereof.
　上記の液体は、空気中の水分を吸収する性質を有している。本実施形態では、一例として、水分を吸収した状態のグリセリン水溶液を処理液Ｓとして、この処理液Ｓから水とグリセリンとを分離する場合について説明する。
　以下、本明細書では、水の粘度よりも高い粘度を有する液体を高粘度液体と称する。 The liquid has a property of absorbing moisture in the air. In the present embodiment, as an example, a case where water and glycerin are separated from the treatment liquid S will be described by using, as an example, a glycerin aqueous solution in a state where moisture has been absorbed.
Hereinafter, in this specification, a liquid having a viscosity higher than that of water is referred to as a high viscosity liquid.
　超音波発生部１２は、霧化槽１１に設けられ、処理液Ｓに超音波を照射することにより処理液Ｓから液滴Ｄを発生させる。本実施形態において、超音波発生部１２は、霧化槽１１の底板に設けられた超音波振動子２１を備えている。超音波振動子２１の個数や配置は、特に限定されない。超音波振動子２１から処理液Ｓに超音波を照射する際、超音波の発生条件を調整することによって、処理液Ｓの液面の特定の個所に超音波を集中させて、処理液Ｓの液柱Ｃを発生させることができる。液滴Ｄは、液面の任意の個所から発生するが、液柱Ｃおよび液柱Ｃの近傍から特に多く発生する。 The ultrasonic generator 12 is provided in the atomization tank 11 and generates droplets D from the processing liquid S by irradiating the processing liquid S with ultrasonic waves. In the present embodiment, the ultrasonic generator 12 includes an ultrasonic transducer 21 provided on the bottom plate of the atomization tank 11. The number and arrangement of the ultrasonic transducers 21 are not particularly limited. When irradiating the treatment liquid S with ultrasonic waves from the ultrasonic transducer 21, the ultrasonic waves are concentrated at specific locations on the liquid surface of the treatment liquid S by adjusting the generation conditions of the ultrasonic waves. The liquid column C can be generated. The droplets D are generated from an arbitrary position on the liquid surface, but are particularly generated from the liquid column C and the vicinity of the liquid column C.
　超音波振動子２１は、振動発生面が霧化槽１１の底面に対して傾くように設置されている。これにより、液柱Ｃは、処理液Ｓの液面に垂直な方向（鉛直方向）に対して傾いて形成される。仮に液柱Ｃが処理液Ｓの液面に垂直な方向に沿って形成されたとすると、一旦上昇した処理液Ｓが液柱Ｃの内部を落下するため、液柱Ｃが安定して形成されない場合がある。また、超音波振動子２１が液面に対して傾いて設置されていないと、液面で反射した超音波が超音波振動子２１に直接戻るため、超音波振動子２１がダメージを受けるおそれがある。液柱Ｃを処理液Ｓの液面に垂直な方向に対して傾けて形成することによって、上記の不具合を改善することができる。 The ultrasonic vibrator 21 is installed such that the vibration generation surface is inclined with respect to the bottom surface of the atomization tank 11. Thereby, the liquid column C is formed to be inclined with respect to a direction (vertical direction) perpendicular to the liquid surface of the processing liquid S. If the liquid column C is formed along a direction perpendicular to the liquid surface of the processing liquid S, the processing liquid S once raised falls inside the liquid column C, and thus the liquid column C is not formed stably. There is. In addition, if the ultrasonic transducer 21 is not installed to be inclined with respect to the liquid surface, the ultrasonic wave reflected by the liquid surface returns directly to the ultrasonic transducer 21, which may cause damage to the ultrasonic transducer 21. is there. By forming the liquid column C so as to be inclined with respect to the direction perpendicular to the liquid surface of the processing liquid S, the above problems can be improved.
　気泡発生部１３は、霧化槽１１に設けられ、処理液Ｓの中に多数の気泡Ｋを発生させる。本実施形態において、気泡発生部１３は、霧化槽１１の内部空間１１ａの底部に設けられた気泡発生器２３と、気泡発生器２３に接続された第２給気管２４と、第２給気管２４に設けられたブロア２５と、を備えている。気泡発生器２３には、第２給気管２４を通じて空気が供給される。気泡発生器２３の具体的な形態や個数等については、特に限定されないが、例えばバブリングを用いたサブミリバブル発生器等を用いることができる。 The bubble generating unit 13 is provided in the atomization tank 11 and generates a large number of bubbles K in the processing liquid S. In the present embodiment, the bubble generation unit 13 includes a bubble generator 23 provided at the bottom of the internal space 11 a of the atomization tank 11, a second supply pipe 24 connected to the bubble generator 23, and a second supply pipe. And a blower 25 provided at 24. Air is supplied to the bubble generator 23 through the second air supply pipe 24. The specific form and number of the bubble generators 23 are not particularly limited. For example, a sub-milli bubble generator using bubbling can be used.
　第１給気管１４は、霧化槽１１の給気口１１ｂに接続されている。また、第１給気管１４の途中には、ブロア１８が設けられている。第１給気管１４を通じて霧化槽１１に空気が供給されることにより、内部空間１１ａにおいて給気口１１ｂから排気口１１ｃに向かう気流が形成される。 The first air supply pipe 14 is connected to the air supply port 11 b of the atomization tank 11. A blower 18 is provided in the middle of the first air supply pipe 14. By supplying air to the atomization tank 11 through the first air supply pipe 14, an air flow from the air supply port 11b to the exhaust port 11c is formed in the internal space 11a.
　排気管１５は、霧化槽１１の排気口１１ｃに接続されている。また、排気管１５の途中には、ブロア１９が設けられている。液滴Ｄを含む空気は、排気管１５を通じて内部空間１１ａから排出される。本実施形態では、第１給気管１４が設けられているため、霧化槽１１の給気口１１ｂから排気口１１ｃに向かう気流が形成されやすい点で好ましいが、第１給気管１４は必ずしも設けられていなくてもよい。 The exhaust pipe 15 is connected to the exhaust port 11 c of the atomization tank 11. A blower 19 is provided in the middle of the exhaust pipe 15. The air containing the droplets D is exhausted from the internal space 11a through the exhaust pipe 15. In this embodiment, since the first air supply pipe 14 is provided, it is preferable in that an air flow from the air supply port 11b of the atomization tank 11 toward the exhaust port 11c is easily formed, but the first air supply pipe 14 is not necessarily provided. It does not have to be done.
　給液管１６は、霧化槽１１の給液口１１ｄに接続されている。処理液Ｓは、給液管１６を通じて内部空間１１ａに供給される。排液管１７は、霧化槽１１の排液口１１ｅに接続されている。処理液Ｓは、排液管１７を通じて内部空間１１ａから排出される。このように、本実施形態の超音波霧化分離装置１０は、給液管１６と排液管１７とを備え、処理液Ｓが連続的に処理される構成を有しているが、本発明の超音波霧化分離装置は、必ずしも給液管と排液管とを備えていなくてもよく、処理液がバッチ処理される構成を有していてもよい。 The liquid supply pipe 16 is connected to the liquid supply port 11 d of the atomization tank 11. The processing liquid S is supplied to the internal space 11 a through the liquid supply pipe 16. The drainage pipe 17 is connected to the drainage port 11 e of the atomization tank 11. The processing liquid S is discharged from the internal space 11 a through the drain pipe 17. As described above, the ultrasonic atomizing / separating apparatus 10 of the present embodiment includes the liquid supply pipe 16 and the drainage pipe 17 and has a configuration in which the processing liquid S is continuously processed. The ultrasonic atomizing / separating apparatus may not necessarily include the liquid supply pipe and the drain pipe, and may have a configuration in which the processing liquid is batch-processed.
　処理液Ｓから発生する液滴Ｄには、例えばナノオーダーからミクロンオーダーまで様々な粒径を有する液滴Ｄが含まれている。液滴Ｄの粒径は、光散乱法による測定、静電式粒径測定器（ＥＡＡ：Electrical Aerosol Analyzer）を用いた測定などによって求めることができる。 The droplets D generated from the treatment liquid S include droplets D having various particle diameters, for example, from nano order to micron order. The particle size of the droplet D can be obtained by measurement using a light scattering method, measurement using an electrostatic particle size measuring device (EAA: Electrical Aerosol Analyzer), or the like.
　処理液Ｓから発生する液滴Ｄの粒径は、処理液Ｓの種類にもよるが、超音波の周波数、超音波振動子２１への投入電力などに影響される。また、水分子とグリセリン等の吸湿性物質分子との分子間力は、水分子同士の分子間力と比べて弱い。そのため、粒径が比較的小さい液滴Ｄには、吸湿性物質が含有されにくいと考えられる。これに対して、粒径が比較的大きい液滴Ｄには、吸湿性物質が含有されやすいと考えられる。すなわち、液滴Ｄの粒径が異なると、一つの液滴Ｄの水と吸湿性物質との含有比率も異なる。 The particle diameter of the droplet D generated from the processing liquid S depends on the frequency of the ultrasonic wave, the input power to the ultrasonic vibrator 21, etc., depending on the type of the processing liquid S. Further, the intermolecular force between water molecules and hygroscopic substance molecules such as glycerin is weaker than the intermolecular force between water molecules. Therefore, it is considered that the droplet D having a relatively small particle size does not easily contain a hygroscopic substance. On the other hand, it is considered that the droplet D having a relatively large particle size is likely to contain a hygroscopic substance. That is, when the particle size of the droplet D is different, the content ratio of the water and the hygroscopic substance in one droplet D is also different.
　そのため、本実施形態において、処理液Ｓ（水分を吸収したグリセリン水溶液）から水分を分離するためには、粒径が小さい液滴Ｄを形成する必要がある。 Therefore, in this embodiment, in order to separate the water from the treatment liquid S (aqueous glycerin solution that has absorbed water), it is necessary to form droplets D having a small particle size.
　そこで、本発明者らは、液滴が実際に形成される様子を確認するため、各種の液体に超音波を照射して液柱を発生させ、液柱とその近傍の様子をハイスピードカメラによって観察した。 Therefore, in order to confirm how droplets are actually formed, the present inventors generate liquid columns by irradiating various liquids with ultrasonic waves, and the liquid column and the vicinity thereof are observed by a high-speed camera. Observed.
　使用した液体は、水、８０ｗｔ％グリセリン水溶液、８０ｗｔ％エチレングリコール水溶液の３種類である。液体吸湿材において、グリセリン、エチレングリコール等の吸湿性物質の濃度が８０ｗｔ％を超えると、霧化効率が低く、濃度が６０ｗｔ％以下であると、水と吸湿性物質との分離度が低下する。この知見に基づき、吸湿性物質の濃度を８０ｗｔ％に設定した。なお、霧化効率は、超音波振動子への供給電力に対する霧化量の比で定義される値である。 The liquids used are three types: water, 80 wt% glycerin aqueous solution, and 80 wt% ethylene glycol aqueous solution. In a liquid hygroscopic material, when the concentration of hygroscopic substances such as glycerin and ethylene glycol exceeds 80 wt%, the atomization efficiency is low, and when the concentration is 60 wt% or less, the degree of separation between water and the hygroscopic substance decreases. . Based on this finding, the concentration of the hygroscopic substance was set to 80 wt%. The atomization efficiency is a value defined by the ratio of the atomization amount to the power supplied to the ultrasonic transducer.
　図２は、水の液柱の様子を観察した写真である。図３は、グリセリン水溶液の液柱の様子を観察した写真である。図４は、エチレングリコール水溶液の液柱の様子を観察した写真である。 Fig. 2 is a photograph observing the state of the liquid column of water. FIG. 3 is a photograph of the liquid column of the glycerin aqueous solution observed. FIG. 4 is a photograph of the appearance of the liquid column of the ethylene glycol aqueous solution.
　図２に示すように、水の場合、液柱の表面にキャピラリー波に起因すると思われる鱗状の微細なパターンが生じている。また、粒径が小さい霧状の液滴が液柱の表面から大量に発生している。写真において、液柱の表面近傍に靄が掛かったように黒く見える部分が霧状の液滴である。一つの液滴の粒径は、例えばサブミクロンオーダー程度である。 As shown in FIG. 2, in the case of water, a fine scale-like pattern that appears to be caused by capillary waves is generated on the surface of the liquid column. In addition, a large amount of mist-like droplets having a small particle diameter are generated from the surface of the liquid column. In the photograph, the portion of the liquid column that appears black as if wrinkled is near the surface of the liquid column is a mist-like droplet. The particle size of one droplet is, for example, on the order of submicrons.
　これに対して、図３に示すように、グリセリン水溶液の場合、液柱の表面に水の場合のような微細なパターンは生じていない。また、液柱の表面の液体が引きちぎられるようにして、粒径が比較的大きい液滴が所々で発生している。一つの液滴の粒径は、例えば百ミクロンオーダー程度である。 In contrast, as shown in FIG. 3, in the case of the glycerin aqueous solution, a fine pattern as in the case of water does not occur on the surface of the liquid column. In addition, droplets having a relatively large particle size are generated in some places so that the liquid on the surface of the liquid column is torn off. The particle size of one droplet is, for example, about 100 microns.
　図４に示すように、エチレングリコール水溶液の場合も、グリセリン水溶液と同様、粒径が比較的大きい液滴が所々で発生している。また、粒径が比較的大きい液滴の発生頻度は、グリセリン水溶液よりも高い。 As shown in FIG. 4, in the case of an ethylene glycol aqueous solution, as in the case of the glycerin aqueous solution, droplets having a relatively large particle size are generated in some places. In addition, the frequency of occurrence of droplets having a relatively large particle size is higher than that of the glycerin aqueous solution.
　以上の観察結果から、本発明者らは、グリセリン水溶液やエチレングリコール水溶液は、水に比べて粒径が小さい液滴が発生しにくいことを確認した。これは、グリセリン水溶液やエチレングリコール水溶液が、水に比べて高い粘度を有していることが影響していると推察される。 From the above observation results, the present inventors have confirmed that glycerin aqueous solution and ethylene glycol aqueous solution are less likely to generate droplets having a smaller particle diameter than water. This is presumed to be due to the fact that the glycerin aqueous solution and the ethylene glycol aqueous solution have a higher viscosity than water.
　ここで、本発明者らは、グリセリン水溶液等の高粘度液体から粒径が小さい液滴を発生させる手段を模索するため、海塩粒子が生成されるモデルに着目した。海塩粒子は、海面から大気中に放出された微小な液滴が液滴の状態のまま、もしくは乾燥した固体粒子として大気中に浮遊する粒子である。 Here, the present inventors focused on a model in which sea salt particles are generated in order to search for means for generating droplets having a small particle diameter from a high viscosity liquid such as a glycerin aqueous solution. Sea salt particles are particles in which minute droplets released from the sea surface into the atmosphere remain in the state of droplets or float in the atmosphere as dry solid particles.
　海塩粒子の生成モデルによれば、３通りのモデルで生成される液滴が存在するが、そのうちの一つである、海面から引きちぎられた飛沫から生成される液滴の粒径は大きく、直ちに海面に落下するため、本発明の参考にはならない。
　したがって、他の２つのモデルについて以下、説明する。 According to the generation model of sea salt particles, there are droplets generated by three types of models, but one of them, the particle size of droplets generated from splashes torn from the sea surface is large, Since it falls to the sea surface immediately, it is not a reference for the present invention.
Therefore, the other two models will be described below.
　図５は、海塩粒子の生成モデルを説明するための図である。
　通常、波等によって海水の内部には空気が取り込まれ、気泡として存在している。
　図５に示すように、海水Ｇに存在する気泡Ｋ１は海面Ｇａまで浮上した後、気泡Ｋ１の上面の海水膜Ｇ１が薄くなって破裂する。この際、海面Ｇａを上方から見ると、気泡Ｋ１を中心として円環状に吹き上げられた数百個程度の微細な液滴Ｄｆが生成される。液滴Ｄｆの粒径は、例えば０．０６μｍ～０．１５μｍ程度である。以下、このように、気泡が液面に上昇した際に液膜が破裂して生成される液滴をフィルム液滴Ｄｆと称する。 FIG. 5 is a diagram for explaining a generation model of sea salt particles.
Normally, air is taken into the seawater by waves or the like and exists as bubbles.
As shown in FIG. 5, after the bubbles K1 existing in the seawater G rise to the sea surface Ga, the seawater film G1 on the upper surface of the bubbles K1 becomes thin and bursts. At this time, when the sea surface Ga is viewed from above, about several hundreds of fine droplets Df blown in an annular shape around the bubble K1 are generated. The particle diameter of the droplet Df is, for example, about 0.06 μm to 0.15 μm. Hereinafter, the droplets generated by the rupture of the liquid film when the bubbles rise to the liquid level are referred to as film droplets Df.
　次に、海面Ｇａに窪みＫ２ができた際に、側面の海水が窪みＫ２の底部に向けて流れ込み、流れ込んだ海水Ｇが窪みＫ２の中央で盛り上がる。その後、盛り上がった海水Ｇの先端が引きちぎられ、フィルム液滴Ｄｆよりも粒径が大きい数個程度の液滴Ｄｊが次々と生成される。液滴Ｄｊの粒径は、例えば７０μｍ～１００μｍ（直径が１ｍｍの気泡の１／１５～１／１０）程度である。以下、このように、気泡が破裂した後の液面の盛り上がりから生成される液滴をジェット液滴Ｄｊと称する。 Next, when the depression K2 is formed in the sea surface Ga, the seawater on the side surface flows toward the bottom of the depression K2, and the flowing seawater G rises at the center of the depression K2. Thereafter, the tip of the rising seawater G is torn off, and several droplets Dj having a particle size larger than the film droplet Df are generated one after another. The particle diameter of the droplet Dj is, for example, about 70 μm to 100 μm (1/15 to 1/10 of a bubble having a diameter of 1 mm). Hereinafter, the droplet generated from the rising of the liquid level after the bubble bursts is referred to as a jet droplet Dj.
　また、フィルム液滴Ｄｆおよびジェット液滴Ｄｊの各々の発生量は、気泡Ｋ１の径に影響を受ける。
　図６は、海水に含まれる気泡の径と液滴の発生量との関係を示すグラフである。グラフの横軸は気泡の粒径であり、縦軸は液滴の発生量であり、ともに相対値である。符号Ｆで示す実線のグラフはフィルム液滴Ｄｆを示し、符号Ｊで示す１点鎖線のグラフはジェット液滴Ｄｊを示している。 Further, the generation amount of each of the film droplet Df and the jet droplet Dj is affected by the diameter of the bubble K1.
FIG. 6 is a graph showing the relationship between the diameter of bubbles contained in seawater and the amount of droplets generated. The horizontal axis of the graph is the bubble particle size, and the vertical axis is the amount of droplets generated, both of which are relative values. A solid line graph indicated by a symbol F indicates a film droplet Df, and a one-dot chain line graph indicated by a symbol J indicates a jet droplet Dj.
　図６に示すように、海水に含まれる気泡の径が変化すると、フィルム液滴Ｄｆの発生量およびジェット液滴Ｄｊの発生量も変化する。具体的に、フィルム液滴Ｄｆについては、気泡の径が大きくなるにつれてフィルム液滴Ｄｆの発生量が多くなる。一方、ジェット液滴Ｄｊについては、フィルム液滴Ｄｆとは逆に、気泡の径が大きくなるにつれてジェット液滴Ｄｊの発生量が少なくなる。したがって、フィルム液滴Ｄｆおよびジェット液滴Ｄｊの各々の発生確率は気泡の径によって制御が可能であると推察される。 As shown in FIG. 6, when the diameter of the bubbles contained in the seawater changes, the generation amount of the film droplet Df and the generation amount of the jet droplet Dj also change. Specifically, for the film droplet Df, the amount of film droplet Df generated increases as the bubble diameter increases. On the other hand, with respect to the jet droplet Dj, contrary to the film droplet Df, the amount of jet droplet Dj generated decreases as the bubble diameter increases. Therefore, it is assumed that the occurrence probability of each of the film droplet Df and the jet droplet Dj can be controlled by the bubble diameter.
　本発明者らは、海塩粒子の生成モデルにおける液滴の粒径のオーダーが、前述のハイスピードカメラ観察による液滴の粒径のオーダーと近いことから、処理液Ｓ中に適切な径の気泡Ｋを導入し、フィルム液滴Ｄｆを積極的に発生させることによって、高粘度液体であっても粒径が小さい液滴を発生させることができることに想到した。 Since the order of the particle size of the droplet in the generation model of sea salt particles is close to the order of the particle size of the droplet by the above-described high-speed camera observation, the present inventors have an appropriate diameter in the treatment liquid S. It was conceived that by introducing the bubbles K and actively generating the film droplets Df, it is possible to generate droplets having a small particle diameter even with a high viscosity liquid.
　すなわち、本発明者らは、本発明の超音波霧化分離装置に海塩粒子の生成モデルを応用したときに生じる作用を以下のように考えた。
　図７は、比較例の超音波霧化分離装置における液柱Ｃ２を示す模式図である。図８は、本実施形態の超音波霧化分離装置１０における液柱Ｃを示す模式図である。なお、比較例は、気泡発生部を備えていない超音波霧化分離装置である。処理液は、ともに高粘度液体を想定している。 That is, the present inventors considered the action that occurs when the sea salt particle generation model is applied to the ultrasonic atomization separation apparatus of the present invention as follows.
FIG. 7 is a schematic diagram showing the liquid column C2 in the ultrasonic atomization separation device of the comparative example. FIG. 8 is a schematic diagram showing the liquid column C in the ultrasonic atomization separation device 10 of the present embodiment. The comparative example is an ultrasonic atomizing / separating device that does not include a bubble generating unit. Both treatment liquids are assumed to be highly viscous liquids.
　比較例の超音波霧化分離装置は、気泡発生部を備えていないとは言え、処理液の中にはキャビテーション等に起因する微小な気泡が含まれている。そのため、図７に示すように、液柱Ｃ２の内部に存在する微小気泡によりフィルム液滴Ｄｆおよびジェット液滴Ｄｊが発生する。ただし、発生頻度はそれ程多くない。 Although the ultrasonic atomizing / separating apparatus of the comparative example does not include a bubble generating unit, the processing liquid contains minute bubbles due to cavitation or the like. Therefore, as shown in FIG. 7, film droplets Df and jet droplets Dj are generated by microbubbles existing inside the liquid column C2. However, the frequency of occurrence is not so high.
　これに対して、本実施形態の超音波霧化分離装置１０は、気泡発生部１３を備えているため、処理液Ｓ中に気泡Ｋを含有させることができる。これにより、図８に示すように、液柱Ｃの内部にも多くの気泡Ｋが存在する。これらの気泡Ｋが液柱Ｃの表面で破裂することにより、多くのフィルム液滴Ｄｆが発生し、フィルム液滴Ｄｆの発生に伴ってジェット液滴Ｄｊも発生する。 On the other hand, since the ultrasonic atomization separation device 10 of the present embodiment includes the bubble generation unit 13, the bubbles K can be contained in the processing liquid S. Thereby, as shown in FIG. 8, many bubbles K also exist inside the liquid column C. When these bubbles K burst on the surface of the liquid column C, many film droplets Df are generated, and jet droplets Dj are also generated as the film droplets Df are generated.
　この場合、処理液Ｓに含有させる気泡Ｋの径は、超音波発生部１２の周波数、１気圧での共振により発生するキャビテーション気泡の径よりも大きく、液柱Ｃの太さよりも小さい。すなわち、仮に超音波霧化分離装置１０が気泡発生部１３を備えていなかったとしても、処理液Ｓに超音波を照射した際に超音波発生部１２の周波数、１気圧での共振によってキャビテーション気泡が発生する。このキャビテーション気泡では、フィルム液滴Ｄｆおよびジェット液滴Ｄｊを多く発生させることができないことは、先のハイスピードカメラによる観察で確認済みである。 In this case, the diameter of the bubbles K contained in the treatment liquid S is larger than the diameter of the cavitation bubbles generated by resonance at the frequency of the ultrasonic wave generation unit 12 and 1 atmosphere, and smaller than the thickness of the liquid column C. That is, even if the ultrasonic atomizing / separating apparatus 10 does not include the bubble generating unit 13, cavitation bubbles are generated by resonance of the ultrasonic generating unit 12 at the frequency of 1 atm when the treatment liquid S is irradiated with ultrasonic waves. Will occur. It has already been confirmed by observation with the high-speed camera that the cavitation bubbles cannot generate many film droplets Df and jet droplets Dj.
　したがって、気泡発生部１３は、超音波発生部１２の周波数、１気圧での共振により発生するキャビテーション気泡の径よりも大きく、液柱Ｃの太さよりも小さい気泡Ｋを発生させる必要がある。さらに、気泡発生部１３は、フィルム液滴Ｄｆの発生確率がジェット液滴Ｄｊの発生確率よりも高くなるサイズの気泡Ｋを発生させることが好ましい。 Therefore, it is necessary for the bubble generation unit 13 to generate bubbles K that are larger than the diameter of the cavitation bubbles generated by resonance at the frequency of the ultrasonic generation unit 12 and 1 atm and smaller than the thickness of the liquid column C. Furthermore, it is preferable that the bubble generation unit 13 generates bubbles K having a size such that the generation probability of the film droplet Df is higher than the generation probability of the jet droplet Dj.
　このように、本実施形態の超音波霧化分離装置１０によれば、フィルム液滴Ｄｆを優先的に発生させることで粒径が小さい液滴Ｄを生成することができるため、水分を吸収したグリセリン水溶液等の処理液Ｓから高い分離度で水分を分離することができる。 Thus, according to the ultrasonic atomization separation apparatus 10 of this embodiment, since the droplet D with a small particle diameter can be produced | generated by generating the film droplet Df preferentially, it absorbed the water | moisture content. Water can be separated from the treatment liquid S such as a glycerin aqueous solution with a high degree of separation.
［第２実施形態］
　以下、本発明の第２実施形態について、図９を用いて説明する。
　本実施形態では、本発明の超音波霧化分離装置を備えた調湿装置について説明する。
　図９は、第２実施形態の調湿装置の概略構成図である。 [Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
This embodiment demonstrates the humidity control apparatus provided with the ultrasonic atomization separation apparatus of this invention.
FIG. 9 is a schematic configuration diagram of a humidity control apparatus according to the second embodiment.
　図９に示すように、本実施形態の調湿装置４０は、吸湿部４１と、霧化再生部４２と、第１液体吸湿材輸送管４３と、第２液体吸湿材輸送管４４と、第１空気供給管４５と、第１空気排出管４６と、第２空気供給管４７と、第２空気排出管４８と、を備えている。調湿装置４０は、室内に設置されており、調湿装置４０を用いて室内の湿度を低下させる場合の例について以下、説明する。 As shown in FIG. 9, the humidity control apparatus 40 according to the present embodiment includes a moisture absorption part 41, an atomization regeneration part 42, a first liquid moisture absorbent transport pipe 43, a second liquid moisture absorbent transport pipe 44, A first air supply pipe 45, a first air discharge pipe 46, a second air supply pipe 47, and a second air discharge pipe 48 are provided. The humidity control apparatus 40 is installed indoors, and an example in the case of reducing indoor humidity using the humidity control apparatus 40 will be described below.
　霧化再生部４２は、本発明の超音波霧化分離装置から構成されている。霧化再生部４２は、吸湿部４１において空気中の水分を吸収したグリコール水溶液等の液体吸湿材Ｓ１（処理液）から水分を分離することにより、液体吸湿材Ｓ１から水分を脱離させ、液体吸湿材Ｓ１を再生する。 The atomization reproduction unit 42 is composed of the ultrasonic atomization separation device of the present invention. The atomization regeneration unit 42 separates moisture from the liquid moisture absorbent S1 (treatment liquid) such as a glycol aqueous solution that has absorbed moisture in the air in the moisture absorbent 41, thereby desorbing moisture from the liquid moisture absorbent S1 and The hygroscopic material S1 is regenerated.
　吸湿部４１は、吸湿槽５０と、ノズル５１と、気液接触部５２と、を備えている。吸湿部４１は、吸湿性物質を含む液体吸湿材Ｓ１と室内の空気とを接触させることにより、空気に含まれる水分の少なくとも一部を液体吸湿材Ｓ１に吸収させる。吸湿部４１は、できるだけ多くの水分を液体吸湿材Ｓ１に吸収させることが望ましいが、空気に含まれる水分のうちの少なくとも一部の水分を液体吸湿材Ｓ１に吸収させればよい。吸湿槽５０の内部には、液体吸湿材Ｓ１が貯留されている。液体吸湿材Ｓ１については後述する。 The moisture absorption part 41 includes a moisture absorption tank 50, a nozzle 51, and a gas-liquid contact part 52. The hygroscopic part 41 causes the liquid hygroscopic material S1 to absorb at least a part of moisture contained in the air by bringing the liquid hygroscopic material S1 containing a hygroscopic substance into contact with indoor air. Although it is desirable for the moisture absorption part 41 to absorb as much water as possible into the liquid moisture absorbent S1, the liquid moisture absorbent S1 may absorb at least a part of moisture contained in the air. Inside the moisture absorption tank 50, the liquid moisture absorbent S1 is stored. The liquid hygroscopic material S1 will be described later.
　吸湿槽５０には、第１空気供給管４５、第１空気排出管４６、第１液体吸湿材輸送管４３および第２液体吸湿材輸送管４４が接続されている。室内の空気は、ブロア５４によって第１空気供給管４５を介して吸湿槽５０の内部空間に供給される。 A first air supply pipe 45, a first air discharge pipe 46, a first liquid hygroscopic material transport pipe 43 and a second liquid hygroscopic material transport pipe 44 are connected to the moisture absorption tank 50. The indoor air is supplied to the internal space of the moisture absorption tank 50 through the first air supply pipe 45 by the blower 54.
　ノズル５１は、吸湿槽５０の内部空間の上部に配置されている。後述する霧化再生部４２によって再生された後、第２液体吸湿材輸送管４４を介して吸湿部４１に戻された液体吸湿材Ｓ１は、ノズル５１から気液接触部５２に流下し、気液接触部５２を流下する間に空気と接触する。この種の液体吸湿材Ｓ１と空気との接触の形態は、一般に「流下方式」と呼ばれる。なお、液体吸湿材Ｓ１と空気との接触形態は、流下方式に限らず、バブリング方式等の他の方式を用いてもよい。 The nozzle 51 is disposed in the upper part of the internal space of the moisture absorption tank 50. After being regenerated by the atomization regenerating unit 42 described later, the liquid hygroscopic material S1 returned to the hygroscopic unit 41 via the second liquid hygroscopic material transport pipe 44 flows down from the nozzle 51 to the gas-liquid contact unit 52, The liquid contacts 52 come into contact with air while flowing down. This type of contact between the liquid hygroscopic material S1 and air is generally referred to as a “flow-down method”. Note that the contact form between the liquid hygroscopic material S1 and air is not limited to the flow-down method, and other methods such as a bubbling method may be used.
　気液接触部５２は、液体吸湿材Ｓ１を空間中に流下させただけの構成に比べて、液体吸湿材Ｓ１と空気との接触面積を増大させる構造体５５を備えている。構造体５５は、例えばハニカム構造を有する構造体などが用いられる。その他、多数のフィンや凹凸形状を有する構造体などが用いられてもよい。この種の構造体５５の上部から液体吸湿材Ｓ１を流下させた際、液体吸湿材Ｓ１は、例えばハニカム構造に沿って流れ落ちるため、液体吸湿材Ｓ１への水分の吸収量を増やすことができる。 The gas-liquid contact part 52 includes a structure 55 that increases the contact area between the liquid hygroscopic material S1 and air as compared with a configuration in which the liquid hygroscopic material S1 is simply allowed to flow into the space. As the structure 55, for example, a structure having a honeycomb structure is used. In addition, a structure having a large number of fins or uneven shapes may be used. When the liquid hygroscopic material S1 flows down from the upper part of this type of structure 55, the liquid hygroscopic material S1 flows down along, for example, the honeycomb structure, so that the amount of moisture absorbed by the liquid hygroscopic material S1 can be increased.
　吸湿槽５０内の空気は、第１空気供給管４５から第１空気排出管４６に向かう気流を形成し、気液接触部５２においてノズル５１から流下する液体吸湿材Ｓ１と接触する。このとき、空気中に含まれる水分の少なくとも一部は、液体吸湿材Ｓ１に吸収されることによって除去される。吸湿部４１では、室内の空気から水分が除去された空気が得られるため、この空気は室内の空気よりも乾燥した状態となる。このように、乾燥した空気が第１空気排出管４６を介して室内に排出される。第１空気排出管４６には、空気を排出するためのブロア５６が設けられている。 The air in the moisture absorption tank 50 forms an air flow from the first air supply pipe 45 toward the first air discharge pipe 46 and comes into contact with the liquid hygroscopic material S <b> 1 flowing down from the nozzle 51 in the gas-liquid contact portion 52. At this time, at least part of the moisture contained in the air is removed by being absorbed by the liquid moisture absorbent S1. In the moisture absorption part 41, since the air from which the water | moisture content was removed from indoor air is obtained, this air will be in the state dried rather than indoor air. Thus, the dried air is discharged into the room through the first air discharge pipe 46. The first air discharge pipe 46 is provided with a blower 56 for discharging air.
　液体吸湿材Ｓ１は、水分を吸収する性質（吸湿性）を示す液体であり、例えば温度が２５℃、相対湿度が５０％、大気圧下の条件で吸湿性を示す液体が好ましい。液体吸湿材Ｓ１は、後述する吸湿性物質を含んでいる。また、液体吸湿材Ｓ１は、吸湿性物質と溶媒とを含んでいてもよい。この種の溶媒としては、吸湿性物質を溶解させる、または吸湿性物質と混和する溶媒が挙げられ、例えば水が挙げられる。吸湿性物質は、有機材料であってもよいし、無機材料であってもよい。 The liquid hygroscopic material S1 is a liquid that exhibits a property of absorbing moisture (hygroscopicity), and for example, a liquid that exhibits hygroscopicity under conditions of a temperature of 25 ° C., a relative humidity of 50%, and atmospheric pressure is preferable. The liquid hygroscopic material S1 contains a hygroscopic substance to be described later. Further, the liquid hygroscopic material S1 may include a hygroscopic substance and a solvent. Examples of this type of solvent include a solvent that dissolves the hygroscopic substance or is miscible with the hygroscopic substance, for example, water. The hygroscopic substance may be an organic material or an inorganic material.
　吸湿性物質として用いられる有機材料としては、例えば２価以上のアルコール、ケトン、アミド基を有する有機溶媒、糖類、保湿化粧品などの原料として用いられる公知の材料などが挙げられる。それらの中でも、親水性が高いことから、吸湿性物質として好適に用いられる有機材料としては、２価以上のアルコール、アミド基を有する有機溶媒、糖類、保湿化粧品等の原料として用いられる公知の材料が挙げられる。 Examples of the organic material used as the hygroscopic substance include known materials used as raw materials for dihydric or higher alcohols, ketones, organic solvents having an amide group, sugars, moisturizing cosmetics, and the like. Among them, known organic materials that are used as raw materials for dihydric or higher alcohols, organic solvents having an amide group, saccharides, moisturizing cosmetics, and the like because of their high hydrophilicity. Is mentioned.
　２価以上のアルコールとしては、例えばグリセリン、プロパンジオール、ブタンジオール、ペンタンジオール、トリメチロールプロパン、ブタントリオール、エチレングリコール、ジエチレングリコール、トリエチレングリコールなどが挙げられる。 Examples of the divalent or higher alcohol include glycerin, propanediol, butanediol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol, and triethylene glycol.
　アミド基を有する有機溶媒としては、例えばホルムアミド、アセトアミドなどが挙げられる。 Examples of the organic solvent having an amide group include formamide and acetamide.
　糖類としては、例えばスクロース、プルラン、グルコース、キシロール、フラクトース、マンニトール、ソルビトールなどが挙げられる。 Examples of the saccharide include sucrose, pullulan, glucose, xylol, fructose, mannitol, sorbitol and the like.
　保湿化粧品などの原料として用いられる公知の材料としては、例えば２－メタクリロイルオキシエチルホスホリルコリン（ＭＰＣ）、ベタイン、ヒアルロン酸、コラーゲンなどが挙げられる。 Examples of known materials used as raw materials for moisturizing cosmetics include 2-methacryloyloxyethyl phosphorylcholine (MPC), betaine, hyaluronic acid, collagen, and the like.
　吸湿性物質として用いられる無機材料としては、例えば塩化カルシウム、塩化リチウム、塩化マグネシウム、塩化カリウム、塩化ナトリウム、塩化亜鉛、塩化アルミニウム、臭化リチウム、臭化カルシウム、臭化カリウム、水酸化ナトリウム、ピロリドンカルボン酸ナトリウムなどが挙げられる。 Examples of inorganic materials used as hygroscopic substances include calcium chloride, lithium chloride, magnesium chloride, potassium chloride, sodium chloride, zinc chloride, aluminum chloride, lithium bromide, calcium bromide, potassium bromide, sodium hydroxide, pyrrolidone. Examples thereof include sodium carboxylate.
　吸湿性物質の親水性が高いと、例えば吸湿性物質の材料と水とを混合させたときに、液体吸湿材Ｓ１の表面（液面）近傍における水分子の割合が多くなる。霧化再生部４２では、液体吸湿材Ｓ１の表面近傍から液滴Ｄを発生させ、液体吸湿材Ｓ１から水分を分離する。そのため、液体吸湿材Ｓ１の表面近傍における水分子の割合が多いと、水分を効率的に分離できる点で好ましい。また、液体吸湿材Ｓ１の表面近傍における吸湿性物質の割合が相対的に少なくなるため、霧化再生部４２での吸湿性物質の損失を抑えられる点で好ましい。 If the hygroscopic substance has high hydrophilicity, for example, when the hygroscopic substance material and water are mixed, the ratio of water molecules near the surface (liquid surface) of the liquid hygroscopic material S1 increases. In the atomization reproduction | regeneration part 42, the droplet D is generated from the surface vicinity of liquid hygroscopic material S1, and a water | moisture content is isolate | separated from liquid hygroscopic material S1. Therefore, a large proportion of water molecules in the vicinity of the surface of the liquid hygroscopic material S1 is preferable in that water can be efficiently separated. Moreover, since the ratio of the hygroscopic substance in the vicinity of the surface of the liquid hygroscopic material S1 is relatively small, it is preferable in that the loss of the hygroscopic substance in the atomization reproduction unit 42 can be suppressed.
　液体吸湿材Ｓ１のうち、吸湿部４１での処理に用いられる液体吸湿材Ｓ１に含まれる吸湿性物質の濃度は、特に限定されないが、４０質量％以上であることが好ましい。吸湿性物質の濃度が４０質量％以上である場合、液体吸湿材Ｓ１は、効率良く水分を吸収することができる。 Of the liquid hygroscopic material S1, the concentration of the hygroscopic substance contained in the liquid hygroscopic material S1 used for the treatment in the hygroscopic portion 41 is not particularly limited, but is preferably 40% by mass or more. When the concentration of the hygroscopic substance is 40% by mass or more, the liquid hygroscopic material S1 can efficiently absorb moisture.
　液体吸湿材Ｓ１の粘度は、２５ｍＰａ・ｓ以下であることが好ましい。これにより、後述する霧化再生部４２において、液体吸湿材Ｓ１の液面に液体吸湿材Ｓ１の液柱Ｃを生じさせやすい。そのため、液体吸湿材Ｓ１から効率良く水分を分離することができる。ただし、本実施形態では、霧化再生部４２として、霧化させる液体の粘度に依らずに高い分離度が得られる本発明の霧化装置を備えているため、たとえ液体吸湿材Ｓ１の粘度が高くても、従来に比べて効率良く水分を分離することができる。 The viscosity of the liquid hygroscopic material S1 is preferably 25 mPa · s or less. Thereby, in the atomization reproduction | regeneration part 42 mentioned later, it is easy to produce the liquid column C of liquid hygroscopic material S1 on the liquid level of liquid hygroscopic material S1. Therefore, moisture can be efficiently separated from the liquid hygroscopic material S1. However, in this embodiment, since the atomization device of the present invention that provides a high degree of separation without depending on the viscosity of the liquid to be atomized is provided as the atomization regenerating unit 42, the viscosity of the liquid moisture absorbent S1 is high. Even if it is high, water can be separated more efficiently than in the past.
　上述したように、霧化再生部４２は、本発明の超音波霧化分離装置から構成されている。第１実施形態の超音波霧化分離装置１０においては、気泡発生部１３が霧化槽１１の内部に設けられていたのに対し、本実施形態では、気泡発生部１３が吸湿槽５０の内部に設けられている。したがって、吸湿槽５０の下部に貯留された液体吸湿材Ｓ１に気泡Ｋが含有される。 As described above, the atomization reproduction unit 42 is constituted by the ultrasonic atomization separation device of the present invention. In the ultrasonic atomization separation device 10 of the first embodiment, the bubble generation unit 13 is provided in the atomization tank 11, whereas in the present embodiment, the bubble generation unit 13 is in the moisture absorption tank 50. Is provided. Therefore, bubbles K are contained in the liquid moisture absorbent S1 stored in the lower part of the moisture absorption tank 50.
　後述するように、本実施形態の気泡発生部１３は、気泡Ｋの内部（気泡Ｋ内の空気）の湿度を低下させる湿度低下部５８としても機能する。換言すると、本実施形態の調湿装置４０は、気泡Ｋの内部の湿度を低下させる湿度低下部５８をさらに備え、湿度低下部５８は、吸湿槽５０の内部に配置された気泡発生部１３で構成されている。 As will be described later, the bubble generating unit 13 of the present embodiment also functions as a humidity reducing unit 58 that reduces the humidity inside the bubble K (air in the bubble K). In other words, the humidity control apparatus 40 according to the present embodiment further includes a humidity reduction unit 58 that reduces the humidity inside the bubble K, and the humidity reduction unit 58 is the bubble generation unit 13 disposed inside the moisture absorption tank 50. It is configured.
　本実施形態の場合、第１空気供給管４５から分岐された第２給気管２４が気泡発生器２３に接続されている。この構成では、湿度調整の対象である室内の空気が気泡発生器２３にも供給され、液体吸湿材Ｓ１において気泡となる。また、この構成によれば、貯留された液体吸湿材Ｓ１の内部でもバブリングによる気液接触が生じ、気泡発生器２３から供給された気泡内の水分が液体吸湿材Ｓ１に吸収される。これにより、気泡Ｋの内部の湿度が低下する。 In the case of the present embodiment, the second air supply pipe 24 branched from the first air supply pipe 45 is connected to the bubble generator 23. In this configuration, the indoor air that is the subject of humidity adjustment is also supplied to the bubble generator 23 and becomes bubbles in the liquid hygroscopic material S1. Further, according to this configuration, gas-liquid contact by bubbling occurs even inside the stored liquid hygroscopic material S1, and moisture in the bubbles supplied from the bubble generator 23 is absorbed by the liquid hygroscopic material S1. Thereby, the humidity inside the bubble K falls.
　吸湿部４１と霧化再生部４２とは、液体吸湿材Ｓ１の循環流路を構成する第１液体吸湿材輸送管４３と第２液体吸湿材輸送管４４とによって接続されている。第２液体吸湿材輸送管４４の途中には、液体吸湿材Ｓ１を循環させるためのポンプ６０が設けられている。 The hygroscopic part 41 and the atomization regeneration part 42 are connected by a first liquid hygroscopic material transport pipe 43 and a second liquid hygroscopic material transport pipe 44 that constitute a circulation channel of the liquid hygroscopic material S1. A pump 60 for circulating the liquid hygroscopic material S1 is provided in the middle of the second liquid hygroscopic material transport pipe 44.
　第１液体吸湿材輸送管４３は、水分の少なくとも一部が吸収された液体吸湿材Ｓ１を吸湿部４１から霧化再生部４２に輸送する。このとき、輸送される液体吸湿材Ｓ１には既に気泡が含有されている。第１液体吸湿材輸送管４３の一端は、吸湿槽５０の下部に接続されている。吸湿槽５０における第１液体吸湿材輸送管４３の接続箇所は、吸湿槽５０内の液体吸湿材Ｓ１の液面よりも下方に位置している。一方、第１液体吸湿材輸送管４３の他端は、霧化槽１１の下部に接続されている。霧化槽１１における第１液体吸湿材輸送管４３の接続箇所は、霧化槽１１内の液体吸湿材Ｓ１の液面よりも下方に位置している。 The first liquid hygroscopic material transport pipe 43 transports the liquid hygroscopic material S1 in which at least a part of moisture has been absorbed from the hygroscopic part 41 to the atomization regeneration part 42. At this time, the liquid hygroscopic material S1 to be transported already contains bubbles. One end of the first liquid hygroscopic material transport pipe 43 is connected to the lower part of the hygroscopic tank 50. The connection location of the first liquid absorbent material transport pipe 43 in the moisture absorbent tank 50 is located below the liquid level of the liquid absorbent material S 1 in the moisture absorbent tank 50. On the other hand, the other end of the first liquid hygroscopic material transport pipe 43 is connected to the lower portion of the atomization tank 11. The connection location of the first liquid absorbent material transport pipe 43 in the atomization tank 11 is located below the liquid surface of the liquid absorbent material S1 in the atomization tank 11.
　第２液体吸湿材輸送管４４は、水分が除去されて再生された液体吸湿材Ｓ１を霧化再生部４２から吸湿部４１に輸送する。第２液体吸湿材輸送管４４の一端は、霧化槽１１の下部に接続されている。霧化槽１１における第２液体吸湿材輸送管４４の接続箇所は、霧化槽１１内の液体吸湿材Ｓ１の液面よりも下方に位置している。一方、第２液体吸湿材輸送管４４の他端は、吸湿槽５０の上部に接続されている。吸湿槽５０における第２液体吸湿材輸送管４４の接続箇所は、吸湿槽５０内の液体吸湿材Ｓ１の液面よりも上方に位置し、上述のノズル５１に接続されている。 The second liquid hygroscopic material transport pipe 44 transports the liquid hygroscopic material S1 regenerated by removing moisture from the atomization regenerating unit 42 to the hygroscopic unit 41. One end of the second liquid hygroscopic material transport pipe 44 is connected to the lower part of the atomization tank 11. The connection location of the second liquid hygroscopic material transport pipe 44 in the atomization tank 11 is located below the liquid level of the liquid hygroscopic material S1 in the atomization tank 11. On the other hand, the other end of the second liquid hygroscopic material transport pipe 44 is connected to the upper portion of the hygroscopic tank 50. The connection location of the second liquid absorbent material transport pipe 44 in the moisture absorbent tank 50 is located above the liquid surface of the liquid absorbent material S1 in the moisture absorbent tank 50 and is connected to the nozzle 51 described above.
　本実施形態の調湿装置４０によれば、霧化再生部４２において液体吸湿材Ｓ１を再生するため、液体吸湿材Ｓ１の吸湿性能を高めることができるとともに、霧化再生部４２における水分の分離度が高いため、霧化再生性能を向上させることができる。これにより、調湿装置４０の省エネルギー化および処理速度の向上を図ることができる。 According to the humidity control apparatus 40 of this embodiment, since the liquid hygroscopic material S1 is regenerated in the atomization regenerating unit 42, the moisture absorption performance of the liquid hygroscopic material S1 can be enhanced, and moisture separation in the atomizing regenerating unit 42 is possible. Since the degree is high, the atomization reproduction performance can be improved. Thereby, the energy saving of the humidity control apparatus 40 and the improvement of a processing speed can be aimed at.
　特に本実施形態の場合、気泡発生部１３が吸湿槽５０の内部に設置され、吸湿槽５０の内部に液体吸湿材Ｓ１が貯留されている時点で、液体吸湿材Ｓ１の中には既に気泡Ｋが含有されている。ところが、液体吸湿材Ｓ１の粘度が高いため、液体吸湿材Ｓ１が霧化槽１１に輸送される間に気泡Ｋ内の水蒸気が吸湿され、気泡Ｋの内部の湿度が低下する。したがって、湿度が低下した気泡Ｋが導入されることによって、霧化再生効率を低下させることがなく、霧化効率を向上させることができる。 In particular, in the case of the present embodiment, when the bubble generating unit 13 is installed inside the moisture absorbing tank 50 and the liquid absorbent material S1 is stored in the moisture absorbing tank 50, the bubble K is already contained in the liquid absorbent material S1. Is contained. However, since the liquid hygroscopic material S1 has a high viscosity, the water vapor in the bubbles K is absorbed while the liquid hygroscopic material S1 is transported to the atomization tank 11, and the humidity inside the bubbles K decreases. Therefore, the introduction of the bubbles K having a reduced humidity can improve the atomization efficiency without reducing the atomization regeneration efficiency.
［第３実施形態］
　以下、本発明の第３実施形態について、図１０を用いて説明する。
　本実施形態の調湿装置の基本構成は第２実施形態と同様であり、気泡発生部の構成が第２実施形態と異なる。
　図１０は、第３実施形態の調湿装置の概略構成図である。
　図１０において、第２実施形態の図９と共通の構成要素には同一の符号を付し、詳細な説明を省略する。 [Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described with reference to FIG.
The basic configuration of the humidity control apparatus of the present embodiment is the same as that of the second embodiment, and the configuration of the bubble generation unit is different from that of the second embodiment.
FIG. 10 is a schematic configuration diagram of a humidity control apparatus according to the third embodiment.
10, the same code | symbol is attached | subjected to the same component as FIG. 9 of 2nd Embodiment, and detailed description is abbreviate | omitted.
　図１０に示すように、本実施形態の調湿装置７０において、気泡発生部１３は、吸湿部７１の吸湿槽５０の上部に設けられた液溜まり部５０ａに設けられている。換言すると、気泡発生部１３は、液体吸湿材Ｓ１の流れ方向において気液接触部５２の上流側に設けられている。 As shown in FIG. 10, in the humidity control apparatus 70 of the present embodiment, the bubble generation unit 13 is provided in a liquid reservoir 50 a provided in the upper part of the moisture absorption tank 50 of the moisture absorption unit 71. In other words, the bubble generating unit 13 is provided on the upstream side of the gas-liquid contact unit 52 in the flow direction of the liquid hygroscopic material S1.
　ノズル５１は、液溜まり部５０ａの下方に設けられている。したがって、本実施形態の場合、気泡Ｋが含有された液体吸湿材Ｓ１がノズル５１から気液接触部５２に向けて流下する。なお、気泡発生部１３とノズル５１とは、一体化されていてもよい。
　調湿装置７０のその他の構成は、第２実施形態と同様である。 The nozzle 51 is provided below the liquid reservoir 50a. Therefore, in the present embodiment, the liquid hygroscopic material S <b> 1 containing the bubbles K flows down from the nozzle 51 toward the gas-liquid contact portion 52. The bubble generating unit 13 and the nozzle 51 may be integrated.
Other configurations of the humidity control apparatus 70 are the same as those in the second embodiment.
　本実施形態の調湿装置７０においても、第２実施形態と同様、液体吸湿材Ｓ１の吸湿性能を高めることができるとともに、霧化再生性能を向上させることができる。これにより、調湿装置７０の省エネルギー化および処理速度の向上を図ることができる。 Also in the humidity control apparatus 70 of the present embodiment, the moisture absorption performance of the liquid moisture absorbent S1 can be enhanced and the atomization regeneration performance can be improved as in the second embodiment. Thereby, the energy saving of the humidity control apparatus 70 and the improvement of a processing speed can be aimed at.
　また、本実施形態の場合、気液接触部５２を構成する構造体５５の表面に気泡Ｋを含む液体吸湿材Ｓ１が付着することにより、第２実施形態に比べて、気液接触部５２における見かけ上の気液接触面積が増加する。これにより、吸湿性能を向上させることができる。 Further, in the case of the present embodiment, the liquid hygroscopic material S1 including the bubbles K adheres to the surface of the structure 55 that constitutes the gas-liquid contact portion 52, so that in the gas-liquid contact portion 52, compared to the second embodiment. Apparent gas-liquid contact area increases. Thereby, moisture absorption performance can be improved.
［第４実施形態］
　以下、本発明の第４実施形態について、図１１を用いて説明する。
　本実施形態の調湿装置の基本構成は第２実施形態と同様であり、気泡発生部の構成が第２実施形態と異なる。
　図１１は、第４実施形態の調湿装置の概略構成図である。
　図１１において、第２実施形態の図９と共通の構成要素には同一の符号を付し、詳細な説明を省略する。 [Fourth Embodiment]
Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG.
The basic configuration of the humidity control apparatus of the present embodiment is the same as that of the second embodiment, and the configuration of the bubble generation unit is different from that of the second embodiment.
FIG. 11 is a schematic configuration diagram of a humidity control apparatus according to the fourth embodiment.
In FIG. 11, the same components as those in FIG. 9 of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
　図１１に示すように、本実施形態の調湿装置８０において、気泡発生部１３は、霧化再生部８２の霧化槽１１の下部に設けられている。後述するように、本実施形態の気泡発生部１３は、気泡Ｋの内部（気泡Ｋ内の空気）の湿度を低下させる湿度低下部５８として機能する。換言すると、本実施形態の調湿装置８０は、気泡Ｋの内部の湿度を低下させる湿度低下部５８をさらに備え、湿度低下部５８は、霧化槽１１の内部に配置された気泡発生器２３を含む気泡発生部１３で構成されている。吸湿部８１は、通常の吸湿槽５０を含む構成である。 As shown in FIG. 11, in the humidity control apparatus 80 of the present embodiment, the bubble generation unit 13 is provided in the lower part of the atomization tank 11 of the atomization regeneration unit 82. As will be described later, the bubble generating unit 13 of the present embodiment functions as a humidity reducing unit 58 that reduces the humidity inside the bubble K (air in the bubble K). In other words, the humidity control apparatus 80 according to the present embodiment further includes a humidity reducing unit 58 that reduces the humidity inside the bubble K, and the humidity reducing unit 58 is disposed in the atomizing tank 11. It is comprised with the bubble generation part 13 containing. The moisture absorption part 81 is configured to include a normal moisture absorption tank 50.
　本実施形態の場合、霧化槽１１に空気を供給する第２空気供給管４７から分岐された第２給気管２４が気泡発生器２３に接続されている。この構成では、霧化槽１１の内部の液滴Ｄを輸送するキャリアガスとしての空気が気泡発生器２３にも供給され、液体吸湿材Ｓ１の内部で気泡Ｋとなる。
　調湿装置８０のその他の構成は、第２実施形態と同様である。 In the case of the present embodiment, a second air supply pipe 24 branched from a second air supply pipe 47 that supplies air to the atomization tank 11 is connected to the bubble generator 23. In this configuration, air as a carrier gas for transporting the droplets D inside the atomization tank 11 is also supplied to the bubble generator 23 to become bubbles K inside the liquid hygroscopic material S1.
The other structure of the humidity control apparatus 80 is the same as that of 2nd Embodiment.
　本実施形態の調湿装置８０においても、第２実施形態と同様、液体吸湿材Ｓ１の吸湿性能を高めることができるとともに、霧化再生性能を向上させることができる。これにより、調湿装置８０の省エネルギー化および処理速度の向上を図ることができる。 Also in the humidity control apparatus 80 of the present embodiment, the moisture absorption performance of the liquid moisture absorbent S1 can be enhanced and the atomization regeneration performance can be improved as in the second embodiment. Thereby, the energy saving of the humidity control apparatus 80 and the improvement of a processing speed can be aimed at.
　また、本実施形態の場合、気泡発生器２３に供給する空気を加熱しておけば、高温で相対湿度が低い気泡Ｋを液体吸湿材Ｓ１に導入することができる。このとき、霧化槽１１における液体吸湿材Ｓ１と気泡Ｋとの熱交換によって平衡温度に達した気泡Ｋの内部の平衡蒸気圧は、再生した液体吸湿材Ｓ１の平衡蒸気圧よりも低いという条件を満たす。これにより、霧化再生効率を低下させることなく、霧化効率を向上させることができる。 In the case of this embodiment, if the air supplied to the bubble generator 23 is heated, the bubbles K having a high temperature and a low relative humidity can be introduced into the liquid moisture absorbent S1. At this time, the condition that the equilibrium vapor pressure inside the bubble K that has reached the equilibrium temperature by the heat exchange between the liquid moisture absorbent S1 and the bubbles K in the atomization tank 11 is lower than the equilibrium vapor pressure of the regenerated liquid moisture absorbent S1. Meet. Thereby, atomization efficiency can be improved, without reducing atomization reproduction | regeneration efficiency.
　なお、本発明の技術範囲は上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
　例えば上記実施形態では、気泡発生部としてバブリングを用いたサブミリバブル発生器を用いる例を挙げたが、その他、キャビテーションを用いた低周波超音波発生器、撹拌時の空気の巻き込みを利用した撹拌装置等を用いることができる。 The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, an example using a sub-milli bubble generator using bubbling as a bubble generation unit has been given. In addition, a low-frequency ultrasonic generator using cavitation, an agitation device using air entrainment during agitation Etc. can be used.
　その他、超音波霧化分離装置および調湿装置を構成する各構成要素の数、形状、配置、材料等については適宜変更が可能である。
　また、本発明の調湿装置は、湿度調整機能だけでなく、温度調節機能を兼ね備えていてもよい。 In addition, the number, shape, arrangement, material, and the like of each component constituting the ultrasonic atomizing separation device and the humidity control device can be appropriately changed.
The humidity control apparatus of the present invention may have not only a humidity adjustment function but also a temperature adjustment function.
　本発明は、超音波霧化分離装置および調湿装置に利用が可能である。 The present invention can be used for an ultrasonic atomization separation device and a humidity control device.

Claims (7)

  1. 　処理液を貯留するとともに、前記処理液の液面に超音波による液柱を発生させて前記処理液の霧状液滴を発生させる霧化槽と、
    　前記超音波を発生させる超音波発生部と、
    　前記処理液の中に気泡を含有させる気泡発生部と、
    　を備え、
    　前記気泡発生部は、前記超音波発生部の周波数、１気圧での共振により発生するキャビテーション気泡の径よりも大きく、前記液柱の太さよりも小さい径を有する前記気泡を前記処理液の中に含有させる、超音波霧化分離装置。     An atomization tank that stores a processing liquid and generates a liquid column by ultrasonic waves on a liquid surface of the processing liquid to generate a mist-like droplet of the processing liquid;
    An ultrasonic generator for generating the ultrasonic waves;
    A bubble generating part for containing bubbles in the treatment liquid;
    With
    The bubble generating unit is configured to cause the bubbles having a diameter larger than the diameter of the cavitation bubble generated by resonance at the frequency of the ultrasonic wave generating unit and 1 atm to be smaller than the thickness of the liquid column into the processing liquid. Ultrasonic atomization separation device to be included.
  2. 　前記霧状液滴は、フィルム液滴とジェット液滴とを含み、
    　前記気泡発生部は、前記フィルム液滴の発生確率が前記ジェット液滴の発生確率よりも高くなるサイズの前記気泡を発生させる、請求項１に記載の超音波霧化分離装置。     The mist droplets include film droplets and jet droplets,
    The ultrasonic atomizing and separating apparatus according to claim 1, wherein the bubble generating unit generates the bubbles having a size such that a generation probability of the film droplet is higher than a generation probability of the jet droplet.
  3. 　吸湿性物質を含む液体吸湿材と空気とを接触させる吸湿槽を備え、前記空気に含まれる水分の少なくとも一部を前記液体吸湿材に吸収させる吸湿部と、
    　前記吸湿部から供給された前記液体吸湿材に含まれる水分の少なくとも一部を霧化し、除去することによって前記液体吸湿材を再生する霧化再生部と、を備え、
    　前記霧化再生部は、請求項１に記載の超音波霧化分離装置から構成され、
    　前記処理液として、前記水分の少なくとも一部が吸収された前記液体吸湿材が用いられる、調湿装置。     A hygroscopic tank comprising a liquid hygroscopic material containing a hygroscopic substance and air in contact with the air, and a hygroscopic part that absorbs at least a portion of moisture contained in the air into the liquid hygroscopic material;
    An atomization regeneration unit that regenerates the liquid moisture absorbent by atomizing and removing at least part of the moisture contained in the liquid moisture absorbent supplied from the moisture absorbent,
    The atomization reproduction unit is configured by the ultrasonic atomization separation device according to claim 1,
    The humidity control apparatus in which the liquid hygroscopic material in which at least a part of the water is absorbed is used as the treatment liquid.
  4. 　前記気泡の内部の湿度を低下させる湿度低下部をさらに備えた、請求項３に記載の調湿装置。 The humidity control apparatus according to claim 3, further comprising a humidity reducing unit that reduces the humidity inside the bubbles.
  5. 　前記湿度低下部は、前記吸湿槽の内部に配置された前記気泡発生部で構成されている、請求項４に記載の調湿装置。 The humidity control apparatus according to claim 4, wherein the humidity reducing unit is configured by the bubble generating unit disposed inside the moisture absorption tank.
  6. 　前記吸湿槽は、前記液体吸湿材と前記空気との接触面積を増大させる構造体を含む気液接触部を備え、
    　前記気泡発生部は、前記液体吸湿材の流れ方向において前記気液接触部の上流側に設けられている、請求項５に記載の調湿装置。     The moisture absorption tank includes a gas-liquid contact portion including a structure that increases a contact area between the liquid moisture absorbent and the air.
    The humidity control apparatus according to claim 5, wherein the bubble generating unit is provided on the upstream side of the gas-liquid contact unit in the flow direction of the liquid hygroscopic material.
  7. 　前記湿度低下部は、前記霧化槽に設けられた前記気泡発生部で構成され、
    　前記気泡発生部に供給される気体は、前記霧化槽の内部に導入されるキャリアガスである、請求項４に記載の調湿装置。     The humidity reduction part is composed of the bubble generating part provided in the atomization tank,
    The humidity control apparatus according to claim 4, wherein the gas supplied to the bubble generation unit is a carrier gas introduced into the atomization tank.
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