WO2020179689A1 - Seawater desalination device and seawater desalination method - Google Patents

Seawater desalination device and seawater desalination method Download PDF

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Publication number
WO2020179689A1
WO2020179689A1 PCT/JP2020/008395 JP2020008395W WO2020179689A1 WO 2020179689 A1 WO2020179689 A1 WO 2020179689A1 JP 2020008395 W JP2020008395 W JP 2020008395W WO 2020179689 A1 WO2020179689 A1 WO 2020179689A1
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Prior art keywords
atomization
seawater
unit
atomized
solution
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PCT/JP2020/008395
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French (fr)
Japanese (ja)
Inventor
奨 越智
豪 鎌田
井出　哲也
洋香 濱田
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シャープ株式会社
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Publication of WO2020179689A1 publication Critical patent/WO2020179689A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

Definitions

  • the present invention relates to a seawater desalination apparatus and a seawater desalination method.
  • the present application claims priority based on Japanese Patent Application No. 2019-40458 filed in Japan on March 6, 2019, the contents of which are incorporated herein by reference.
  • Patent Document 1 discloses a technique for recovering fresh water by atomizing seawater, separating only atomized fine particles, cooling and condensing. Further, in Patent Document 2, seawater is electrostatically atomized to atomize seawater into a mist in a transport gas, and the atomized mist is classified by a mist classifier according to the particle size to be an extremely fine mist containing no salt. The technology for recovering fresh water is disclosed.
  • One aspect of the present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a seawater desalination apparatus and a seawater desalination method capable of efficiently desalinating seawater with energy saving. ..
  • the seawater desalination apparatus of the present invention includes an atomization separation unit that atomizes an atomizing solution composed of a mixed solution of seawater and polyhydric alcohol to generate atomized droplets substantially composed of water.
  • the atomization separation unit includes a storage unit for storing the seawater and the polyhydric alcohol supplied to the atomization separation unit, and an atomization droplet collection unit for collecting the atomized droplets, and the atomization separation unit is atomized. It has an atomization separation tank which stores a solution, and an ultrasonic wave generation part which is provided in the atomization separation tank and irradiates the atomized solution with ultrasonic waves.
  • the seawater desalination apparatus may be configured to include a filter unit that filters the atomized solution in the atomization separation unit to remove the precipitated salt.
  • the seawater desalination apparatus may also be configured to include a control unit that manages the concentration ratios of water, sea water-soluble and the polyhydric alcohol in the atomized solution stored in the atomization separation unit. Good.
  • the atomization separation tank has a supply port to which the seawater and the polyhydric alcohol are supplied from the storage unit, and the management unit is the supply port and the said. It may be configured so as to be provided apart from the ultrasonic wave generation unit.
  • the management unit includes a refractive index measuring device for measuring the refractive index of the atomizing solution, a viscometer measuring device for measuring the viscosity of the atomizing solution, and the atomizing device. It may be configured to include an electric conductivity measuring device for measuring the electric conductivity with respect to the solution.
  • At least a flow passage system that connects the atomization separation unit, the storage unit, and the atomized droplet collection unit is provided, and the flow channel system is the atomization device. It may be configured to have a discharge flow path for discharging the atomized solution from the separation portion.
  • the seawater desalination apparatus may be configured to include a heating device that heats the seawater or the atomized solution.
  • the heating device includes a heat pump having a heating unit and a cooling unit, the seawater or the atomizing solution is heated by the heating unit, and the atomization is performed by the cooling unit. It may be configured to cool the desalination droplets.
  • a sound wave generation unit that irradiates sound waves to the atomized droplets is disposed between the atomized separation unit and the atomized droplet collection unit. It may be configured.
  • an atomizing solution composed of a mixed solution of seawater and polyhydric alcohol is atomized at the atomization separation section to generate atomized droplets substantially composed of water, and the above-mentioned method.
  • the atomization separation section includes a step of supplying the seawater and the polyhydric alcohol and a step of collecting the atomized droplets, and the atomization separation section includes the step of being stored in the atomization separation tank.
  • a seawater desalination method in which ultrasonic waves are applied to an atomized solution to form a liquid column on the liquid surface of the atomized solution to generate the atomized droplets.
  • the seawater desalination method according to one aspect of the present invention may be a method including a step of filtering the atomized solution in the atomization separation unit.
  • the composition of the atomization solution is controlled during generation of the atomized droplets, and the supply ratio of the seawater and the polyhydric alcohol to the atomization separation unit is adjusted. It may be a method.
  • the seawater desalination method of one embodiment of the present invention may be a method of heating the seawater or the atomized solution to atomize.
  • the seawater desalination method according to one aspect of the present invention may be a method of forming droplets by irradiating the atomized droplets with sound waves.
  • FIG. 1 is a schematic view showing the overall configuration of the seawater desalination apparatus according to the first embodiment.
  • FIG. 2 is a graph showing the relationship between the concentration of the polyhydric alcohol and the refractive index.
  • FIG. 3 is a graph showing the relationship between the concentration of the polyhydric alcohol and the viscosity.
  • FIG. 4 is a graph showing the relationship between the electric conductivity of the polyhydric alcohol and the weight concentration.
  • FIG. 5 is a schematic view showing the configuration of the atomized droplet collecting portion.
  • FIG. 6 is a schematic view showing another configuration of the atomized droplet collecting portion.
  • FIG. 7 is a correlation diagram showing the composition conditions of the three components, and also shows the concentration ratio of the three components of the atomized solution W3, which is seawater (NaCl), water, and glycerin (polyhydric alcohol).
  • FIG. 8 is a schematic diagram which shows the whole structure of the seawater desalination apparatus of 2nd Embodiment.
  • FIG. 9 is a schematic view showing the overall configuration of the seawater desalination apparatus of the third embodiment.
  • FIG. 10 is a schematic diagram showing the overall configuration of the seawater desalination apparatus of the fourth embodiment.
  • FIG. 11 is an enlarged view showing the position of the sound wave generating portion.
  • FIG. 1 is a schematic diagram showing the overall configuration of a seawater desalination apparatus 100 according to the first embodiment.
  • FIG. 2 is a graph showing the relationship between the concentration of the polyhydric alcohol and the refractive index.
  • FIG. 3 is a graph showing the relationship between the concentration of polyhydric alcohol and the viscosity.
  • FIG. 4 is a graph showing the relationship between the electric conductivity of the polyhydric alcohol and the weight concentration.
  • FIG. 5 is a schematic diagram showing the configuration of the atomized droplet recovery unit 15.
  • FIG. 6 is a schematic diagram showing another configuration of the atomized droplet recovery unit 15.
  • a seawater desalination apparatus 100 includes a seawater storage unit (storage unit) 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit (storage unit) 14, and atomization. It is configured to have a droplet collection unit 15, a management unit 16, a flow path system 19 and a control unit 3.
  • the seawater storage unit 11 stores seawater W1.
  • the main component of seawater W1 is sodium chloride, and the salinity is 3.5%.
  • the seawater storage unit 11 is connected to the atomization separation unit 12 via the first supply flow path 19A, and is stored in the seawater storage unit 11 by driving the supply pump P1 arranged on the first supply flow path 19A.
  • the separated seawater W1 is supplied to the atomization separation unit 12.
  • the polyhydric alcohol storage unit 14 stores a predetermined polyhydric alcohol W2 added to the seawater W1.
  • the polyhydric alcohol storage unit 14 is connected to the atomization separation unit 12 via the second supply flow path 19B, and the polyhydric alcohol storage unit 14 is driven by the supply pump P2 arranged on the second supply flow path 19B.
  • the polyhydric alcohol W2 stored in the section 14 is supplied to the atomization separation section 12.
  • glycerin is used as the polyhydric alcohol W2. Since glycerin is a component that is also used in lotions and the like, it has an advantage that it is easy to handle without any problems even if it is touched by humans.
  • examples of the polyhydric alcohol W2 include propanediol, butanediol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol, triethylene glycol and the like.
  • glycerin, ethylene glycol, and triethylene glycol can be easily adjusted in viscosity, have high solubility in water, and can be separated from water.
  • the atomization separation unit 12 includes at least an atomization separation tank (storage tank) 121 and an ultrasonic vibrator (ultrasonic generation unit) 122.
  • an atomization separation tank (storage tank) 121 Into the internal space 121c of the atomization separation tank 121, the seawater W1 and the polyhydric water supplied from the seawater storage unit 11 and the polyhydric alcohol storage unit 14 through the first supply passage 19A and the second supply passage 19B, respectively.
  • An atomization solution W3 made of a mixed liquid with alcohol W2 is stored.
  • the first supply port (supply port) 121a to which the first supply flow path 19A is connected and the second supply port (supply port) to which the second supply flow path 19B is connected are connected.
  • it has two supply ports with 121b, it is supplied when a confluence point between the first supply flow path 19A and the second supply flow path 19B is provided on the front stage side (upstream side) of the atomization separation tank 121. You may have one mouth.
  • the ultrasonic vibrator 122 oscillates ultrasonic waves for generating a liquid column S.
  • only one ultrasonic vibrator 122 is shown, but the number of ultrasonic vibrators 122 can be changed as appropriate, and a plurality of ultrasonic vibrators 122 may be provided.
  • the ultrasonic transducer 122 is preferably provided so as to be inclined with respect to the bottom surface 121e of the atomization separation tank 121.
  • the axis perpendicular to the ultrasonic irradiation surface 122a from the center of the ultrasonic irradiation surface 122a of the ultrasonic vibrator 122 is defined as the ultrasonic radiation axis J. Since the ultrasonic transducer 122 is inclined with respect to the bottom surface 121e of the atomization separation tank 121, the ultrasonic waves are irradiated with ultrasonic waves so that the radiation axis J is inclined with respect to the liquid surface 9 of the atomization solution W3. It is propagated from the surface 122a toward the liquid surface 9. This has the advantage that the ultrasonic waves reflected by the liquid surface 9 are less likely to return to the ultrasonic vibrator 122, and the ultrasonic vibrator 122 is less likely to be damaged by the ultrasonic waves.
  • a liquid column S is formed on the liquid surface 9 of the atomized solution W3, and the liquid column S The water is separated from the surface of the to produce nano mist (atomized droplets).
  • the liquid level 9 of the atomizing solution W3 has a predetermined height by adjusting the ultrasonic wave generation conditions such as the output and frequency of the ultrasonic waves.
  • the liquid column S of the atomized solution W3 can be generated.
  • the atomization separation unit 12 atomizes the atomization solution W3 obtained by adding the polyhydric alcohol to the seawater to generate the nanomist (atomization droplets) N that is substantially water, and then the seawater W1. At least a part of the contained water is atomized and separated.
  • the generated nanomist N is sent to the atomized droplet collecting unit 15 via the flow path system 19.
  • the “nanomist consisting essentially of water” is a mist having a water specific weight fraction of 99.9% or more.
  • the management unit 16 includes a refractive index measuring device for measuring the refractive index of the atomizing solution W3 stored in the atomizing separation tank 121, a viscometer measuring device for measuring the viscosity of the atomizing solution W3, and electricity for the atomizing solution W3.
  • a monitoring instrument 161 having at least an electric conductivity measuring instrument for measuring the conductivity is provided.
  • the concentration of the polyhydric alcohol W2 in the atomized solution W3 can be identified by measuring the refractive index of the atomized solution W3 with the refractive index measuring device.
  • the concentration of the polyhydric alcohol W2 in the atomized solution W3 can be identified by measuring the viscosity of the atomized solution W3 with the viscosity meter.
  • the weight concentration of the salt (calcium chloride, lithium chloride) in the atomizing solution W3 tends to increase monotonically with respect to the electric conductivity, and the electric conductivity of the salt depends on the concentration. It fluctuates greatly. Therefore, it is possible to identify the salt concentration of the atomized solution W3 by providing the electric conductivity measuring device.
  • the main component of seawater W1 is sodium chloride, but calcium chloride and lithium chloride are also included.
  • the weight concentration of sodium chloride also tends to monotonically increase with respect to the electric conductivity.
  • the monitoring instrument 161 provided with such a plurality of measuring instruments monitors the composition state of the atomizing solution W3 stored in the atomizing separation unit 12 and feeds it back to the control unit 3 at least during the atomizing operation. ..
  • a database of the refractive index, viscosity, and electric conductivity of each composition of the atomizing solution W3 is constructed in advance, and the control unit 3 pumps according to the results of each measuring instrument in the monitoring instrument 161.
  • the concentration ratio of water, sea water soluble matter (salt content), and polyhydric alcohol in the atomized solution W3 is managed.
  • the management unit 16 in the present embodiment preferably includes a water level measurement unit 18 that measures the water level of the atomized solution W3 stored in the atomization separation tank 121.
  • the water level of the atomization solution W3 may be adjusted according to the composition of the atomization solution W3 so as to maximize the atomization efficiency, or may be adjusted by the number of ultrasonic transducers 122, the output, and the like.
  • the management unit 16 may separately include a stirring unit that stirs the atomized solution W3 stored in the atomization separation tank 121.
  • the atomizing solution W3 is also agitated by the ultrasonic vibrator 122 described above, but the concentration unevenness of the polyhydric alcohol W2 can be further suppressed by actively agitating the atomizing solution W3 by the stirring unit 163.
  • the first supply port (supply port) 121a in which the concentration of the polyhydric alcohol W2 tends to be lowered by the supplied seawater W1 and the polyhydric alcohol W2 supplied are used. It is preferable that the alcohol W2 is arranged at a location away from the second supply port (supply port) 121b where the concentration of the alcohol W2 tends to increase. Further, it is preferable to be arranged at a position away from the ultrasonic transducer 122 where the salt concentration is likely to increase due to atomization. For example, in the atomization separation tank 121, it is more preferable that the atomization separation tank 121 is provided in the vicinity of the above-mentioned stirring portion. Thereby, the composition of the atomized solution W3 can be measured more accurately.
  • the filtration unit 13 is connected to the rear side of the atomization separation tank 121.
  • the filtration unit 13 is connected to the atomization separation tank 121 via the discharge circulation flow path 19C and the supply circulation flow path 19D, and filters and deposits the atomization solution W3 stored in the atomization separation tank 121. It has the function of removing the salt.
  • the removed salt E is recovered in the salt recovery unit 7 via the salt discharge flow path 19J connected to the filtration unit 13.
  • the recovered salt E can be reused for other purposes.
  • At least the discharge circulation flow path 19C is the bottom side of the atomization separation tank 121, and the liquid level of the atomization solution W3 stored in the atomization separation tank 121. It is provided at a position that is always lower than 9. Thereby, the atomized solution W3 can be efficiently taken out from the atomization separation tank 121 and filtered.
  • control unit 3 individually operates the plurality of pumps P1, P2, P3, P4 provided in the flow path system 19 based on the previously constructed database. It is possible to control the composition of the atomized solution W3 by controlling and adjusting the supply amount, filtration speed, and drainage amount of seawater and polyhydric alcohol W2 stored in the atomization separation tank 121, respectively.
  • the atomization separation tank 121 is connected to the atomization droplet collection unit 15 arranged on the rear side of the atomization separation tank 121.
  • the atomized droplet collecting unit 15 collects the nanomist generated in the atomizing separation unit 12 and returns it to a liquid to obtain fresh water.
  • the atomized droplet recovery unit 15 is connected to the atomization separation tank 121 via the mist delivery flow path 19G.
  • the mist delivery flow path 19G is connected to a portion on the upper side of the wall portion 121d of the atomization separation tank 121 and always higher than the water level of the atomization solution W3 stored in the atomization separation tank 121. There is.
  • the gas A1 containing the generated nanomist N can be efficiently sent out to the atomized droplet collecting unit 15 without causing the atomized solution W3 stored in the atomization separation tank 121 to flow in.
  • a hydrophilic adsorbent 151 may be used as the atomized droplet collecting unit 15, for example, as shown in FIG. 5, a hydrophilic adsorbent 151 may be used.
  • the hydrophilic adsorbent 151 is a dispersion of nanoporous silica particles or titania particles having high hydrophilicity for adsorbing water molecules, and a plurality of hydrophilic adsorbents 151 are provided in the housing 152.
  • the gas A1 containing nanomist N sent from the atomization separation unit 12 flows between the plurality of hydrophilic adsorbents 151 arranged apart from each other, whereby in the above-mentioned nanopore silica particles and the like. Moisture is recovered and fresh water W is obtained.
  • a freshwater storage tank 8 is connected to the subsequent stage of the atomized droplet collection unit 15 via a freshwater discharge flow path 19E, and in the freshwater storage tank 8, the freshwater W obtained by the atomized droplet collection unit 15 is It is stored. Further, the atomized droplet collecting unit 15 is connected to the atomizing separation tank 121 via the air supply flow path 19F, and the dry air A2 from which moisture has been removed and dehumidified is passed through the air supply flow path 19F. It is configured to be sent to the atomization separation unit 12.
  • the atomized droplet collecting unit 15 is not limited to the configuration provided with the hydrophilic adsorbent 151.
  • a plurality of fins 153 arranged at predetermined intervals and the plurality of fins 153 are provided.
  • a configuration may be adopted in which the nanomist N is cooled by circulating the refrigerant in the heat exchange pipe 154 using the heat exchange pipe 154 arranged so as to straddle the heat exchange pipe 154 and the compressor 155 to obtain fresh water W.
  • nanomist is liquefied by mechanical collision action such as sacron, chevron and demista to obtain fresh water.
  • mechanical collision action such as sacron, chevron and demista to obtain fresh water.
  • the cooling heat exchange action and the mechanical collision action may be combined.
  • FIG. 7 is a correlation diagram showing the concentration ratios of the three components of the atomized solution W3: seawater (NaCl), water, and glycerin (polyhydric alcohol).
  • the salt of seawater W1 is mainly composed of sodium chloride (NaCl).
  • NaCl sodium chloride
  • the inventor performed ultrasonic atomization of a sodium chloride aqueous solution having a seawater concentration of 3.5% and a sodium chloride aqueous solution having a saturation concentration of 26.5%, which reproduced seawater W1, and tested whether only water could be separated.
  • Sodium chloride leaked into the generated micromist, and it was found that it was difficult to recover only water.
  • FIG. 7 shows the range of the “micromist generation region R3”. Therefore, in order to ultrasonically atomize the sodium chloride aqueous solution to obtain fresh water, a separation process for further separating only water from the micromist is required in the subsequent stage.
  • the seawater desalination apparatus 100 of one aspect of the present invention can adjust the concentration balance of the polyhydric alcohol W2 of the atomized solution W3 in the atomization separation unit 12.
  • FIG. 7 shows the range of the “nanomist generation region R1”.
  • composition condition of the atomized solution W3 in the “nano mist generation region R1" is referred to as "initial condition”.
  • seawater desalination method Next, a seawater desalination method using the seawater desalination apparatus 100 will be described.
  • the seawater W1 is supplied from the seawater storage unit 11 to the atomization separation tank 121 by driving the pumps P1 and P2 arranged on the first supply flow path 19A and the second supply flow path 19B,
  • Polyhydric alcohol W2 such as glycerin is supplied from the polyhydric alcohol storage unit 14 to the atomization separation tank 121.
  • the monitoring instrument 161 of the control unit 16 determines the refractive index, viscosity, and electrical conductivity of the mixed solution of seawater W1 and polyhydric alcohol W2 supplied into the atomization separation tank 121, that is, the atomization solution W3. Measure and monitor the concentration of polyhydric alcohol W2. Seawater W1 and polyhydric alcohol W2 are supplied until the composition of the atomizing solution W3 reaches the above-mentioned "initial conditions".
  • the fan 17 provided in the air supply flow path 19F is driven to supply air into the atomization separation tank 121, and the liquid column is supplied.
  • nanomist N is generated.
  • the generated nanomist N is almost composed of water, and only water is separated from the atomized solution W3.
  • the gas A1 containing the generated nanomist N is sent to the atomized droplet collection unit 15 via the mist delivery flow path 19G.
  • the atomized droplet collecting unit 15 when the gas A1 passes between the plurality of arranged hydrophilic adsorbents 151, the nanomist N contained in the gas A1 is adsorbed by a large number of nanopore silica particles.
  • the fresh water W that has been collected and turned into a liquid is discharged to the fresh water storage tank 8 through the fresh water discharge flow path 19E and collected.
  • the dry air that has been dehumidified by removing water in the atomized droplet recovery unit 15 is sent to the atomization separation unit 12 via the air supply flow path 19F.
  • the concentration ratio of each composition in the atomized solution W3 is monitored by the monitoring instrument 161 and the seawater W1 is constantly supplied and supplied from the seawater storage unit 11 to the atomization separation tank 121.
  • the polyhydric alcohol W2 corresponding to the amount of the seawater W1 is appropriately supplied from the polyhydric alcohol storage unit 14.
  • the composition of the atomizing solution W3 is an "unsaturated region" even in the "initial conditions". It is limited to the boundary line K with "R2".
  • Nanomist N produced by ultrasonic atomization contains almost no seawater, and almost freshwater mist is generated.
  • the seawater desalination apparatus 100 of the present embodiment by adding the polyhydric alcohol W2 to the seawater, it is possible to generate nanomist N almost composed of water at the stage of ultrasonic atomization. Therefore, it is not necessary to further separate the fresh water from the mist by using the conventional separation device, and it becomes possible to recover the fresh water more efficiently with energy saving.
  • the control unit 16 constantly monitors the composition of the atomized solution W3, and the concentration ratio of the seawater-soluble substance and the polyhydric alcohol W2 is kept in the "nano mist generation region R1".
  • the liquid column S is satisfactorily formed in the atomization separation section 12, and the production efficiency of nanomist N by atomization Can be enhanced.
  • the seawater desalination apparatus 100 can be continuously operated while maintaining the atomization efficiency, a large amount of seawater W1 can be efficiently desalinated.
  • the seawater storage unit 11 and the multivalent alcohol storage unit 14 are provided, respectively, and the atomization separation unit 12 mixes the seawater W1 and the multivalent alcohol W2.
  • the initial condition liquid supply unit in which the polyhydric alcohol W2 is mixed in advance and the initial condition liquid adjusted to the “initial condition” is stored may be provided in place of the seawater storage unit 11 and the polyhydric alcohol storage unit 14.
  • the flow path system 19 of the present embodiment has an atomized solution discharge flow path (discharge flow path) 19H for discharging the atomized solution W3 from the atomization separation unit 12.
  • discharge flow path discharge flow path
  • the concentration ratio of the seawater-soluble substance and the polyhydric alcohol W2 in the atomizing solution W3 can be controlled more efficiently.
  • seawater desalination apparatus 200 of the second embodiment of the present invention will be described.
  • the basic configuration of the seawater desalination device 200 of the present embodiment shown below is substantially the same as that of the first embodiment, except that the heating device 21 is provided. Therefore, in the following description, points different from the previous embodiment will be described in detail, and description of common points will be omitted. Moreover, in each drawing used for the description, the same reference numerals are given to the constituent elements common to the above-described embodiment.
  • FIG. 8 is a schematic diagram which shows the whole structure of the seawater desalination apparatus 200 of 2nd Embodiment.
  • the seawater desalination apparatus 200 of the present embodiment includes a seawater storage unit 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit 14, an atomized droplet collection unit 15, a management unit 16, a flow path system 19, and The controller 3 is provided, and the heating device 21 is further provided.
  • the warming device 21 is arranged on the first supply flow path 19A between the seawater storage unit 11 and the atomization separation unit 12, and heats the seawater W1 supplied from the seawater storage unit 11 to the atomization separation unit 12. To do.
  • the heating device 21 in the present embodiment uses, for example, solar heat, but is not limited to this.
  • the heating device 21 may be arranged on the second supply flow path 19B between the polyhydric alcohol W2 and the atomization separation unit 12. Both the seawater W1 and the polyhydric alcohol W2 may be heated, or only one of them may be heated.
  • a heating device 21 may be added to the atomization separation unit 12 to heat the atomization solution W3.
  • a heating device 21 may be added to the atomization separation unit 12 to heat the atomization solution W3.
  • FIG. 9 is a schematic diagram showing the overall configuration of the seawater desalination apparatus 300 of the third embodiment.
  • the seawater desalination apparatus 300 of this embodiment includes a seawater storage unit 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit 14, an atomized droplet collection unit 15, a management unit 16, a flow path system 19, and
  • the heat pump 31 is further provided in addition to the control unit 3.
  • the atomized droplet collecting unit 15 of the present embodiment collects nanomist N as droplets by a cooling action in the cooling unit 33 of the heat pump 31 to obtain fresh water.
  • the gas containing nanomist N is cooled by circulating the refrigerant through the heat exchange pipe 154 as shown in FIG. 6, and in the present embodiment, the cooling heat (endothermic) obtained at this time is used. Then, the seawater W1 is heated.
  • the temperature of the refrigerant is raised by compressing the refrigerant with the compressor 34, and the heated refrigerant is supplied to the heating unit 32 and circulated through the heat exchange pipe 154 to move from the seawater storage unit 11 to the atomization separation unit 12.
  • the seawater W1 to be sent is heated.
  • the nano mist N can be efficiently liquefied by utilizing the respective actions of the heating unit 32 and the cooling unit 33 of the heat pump 31, and the cooling heat at this time is used to heat the seawater W1. , Energy saving can improve atomization efficiency.
  • FIG. 10 is a schematic diagram which shows the whole structure of the seawater desalination apparatus 400 of 4th Embodiment.
  • FIG. 11 is an enlarged view showing the arrangement position of the sound wave generator 41.
  • the seawater desalination apparatus 400 of the present embodiment includes a seawater storage unit 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit 14, an atomized droplet collection unit 15, a management unit 16, a flow path system 19, and A control unit 3 and a heat pump 31 are provided, and a sound wave generating unit 41 is further provided.
  • a sound wave generating unit 41 is provided on the mist sending flow path 19G between the atomizing separation unit 12 and the atomized droplet collecting unit 15 with respect to the gas A1 containing nanomist N.
  • nanomist N can be coarsened by vibration of sound.
  • the nanomist can be aggregated in the region shown by the alternate long and short dash line in FIG. 11, and the atomized droplet collecting unit 15 is supplied with the gas containing the mist coarsened in this way. It is possible to save energy in the process of recovering fresh water at 15.
  • a speaker as the sound wave generating unit 41, for example, to generate a sound wave having a sound range of 100 to 1000 Hz.

Abstract

Provided are a seawater desalination device and seawater desalination method that can desalinate seawater with less energy consumption and high efficiency. This seawater desalination device has: an atomization separation unit that atomizes an atomization solution including a liquid mixture of seawater and a polyhydric alcohol, to generate atomized droplets containing substantially only water; a retention unit that retains seawater and the polyhydric alcohol to be supplied to the atomization separation unit; and an atomized droplet collection unit that collects the atomized droplets, wherein the atomization separation unit has an atomization separation tank that retains the liquid mixture, and an ultrasonic wave generation unit that is provided in the atomization separation tank and that applies ultrasonic waves to the atomization solution.

Description

海水淡水化装置および海水淡水化方法Seawater desalination equipment and seawater desalination method
　本発明は、海水淡水化装置および海水淡水化方法に関するものである。
　本願は、２０１９年３月６日に日本で出願された特願２０１９－４０４５８号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a seawater desalination apparatus and a seawater desalination method.
The present application claims priority based on Japanese Patent Application No. 2019-40458 filed in Japan on March 6, 2019, the contents of which are incorporated herein by reference.
　従来、海水淡水化技術として、加熱蒸発させた水蒸気を凝縮させる蒸留法や、水分子のみを選択透過させる逆浸透膜法が適用されているが、蒸留法の場合は、潜熱変換による消費エネルギーが大きく、逆浸透膜法の場合は、イニシャルコストがかかるとともに高圧プロセスのため大規模装置に用途限定されるといった課題があった。
　そこで、海水を霧化し、霧中のナノミストのみを分離した後、液体を回収することで淡水を得る方法が存在する（例えば、特許文献１，２）。 Conventionally, as a seawater desalination technology, a distillation method of condensing steam that has been heated and evaporated, and a reverse osmosis membrane method of selectively permeating water molecules have been applied, but in the case of the distillation method, energy consumption due to latent heat conversion is reduced. In the case of the reverse osmosis membrane method, there are problems that the initial cost is high and the application is limited to large-scale equipment due to the high-pressure process.
Therefore, there is a method of obtaining fresh water by atomizing seawater, separating only nanomist in the mist, and then recovering the liquid (for example, Patent Documents 1 and 2).
　特許文献１では、海水を霧化した後、霧化微粒子のみを分離して冷却凝縮し、淡水を回収する技術が開示されています。また、特許文献２では、静電霧化して海水を搬送気体中にミストに霧化すると共に、霧化されたミストを粒径でミスト分級器で分級して、塩分を含まない極めて微細なミストを回収して淡水を得る技術が開示されています。 Patent Document 1 discloses a technique for recovering fresh water by atomizing seawater, separating only atomized fine particles, cooling and condensing. Further, in Patent Document 2, seawater is electrostatically atomized to atomize seawater into a mist in a transport gas, and the atomized mist is classified by a mist classifier according to the particle size to be an extremely fine mist containing no salt. The technology for recovering fresh water is disclosed.
特開２０１６－１６５６７６号公報JP, 2016-165676, A 国際公開第２０１２／１０５６５４号International Publication No. 2012/105654
　しかしながら、従来の方法では、マイクロサイズの霧化液滴が生成される。マイクロミスト中には海水成分が漏洩しているため、淡水のみを分離させる分離プロセスが別途必要になる。この分離プロセス時にマイクロミストが蒸発してしまい、後段での淡水回収効率を低下させてしまうという問題があった。また、蒸発して気体の状態になった水蒸気を再び液体に戻すために冷却凝縮による回収プロセスが必要になり、その分のエネルギーロスが大きくなってしまう。さらに、引用文献１，２では、霧に海水成分が漏洩している可能性が高く、淡水のみを回収するのは難しい。 However, in the conventional method, micro-sized atomized droplets are generated. Since seawater components leak into the micro mist, a separate process for separating only fresh water is required. There is a problem that the micro mist evaporates during this separation process, which lowers the freshwater recovery efficiency in the subsequent stage. In addition, a recovery process by cooling and condensation is required to return the vaporized water vapor to the liquid again, resulting in a large energy loss. Further, in References 1 and 2, there is a high possibility that seawater components are leaking into the fog, and it is difficult to recover only fresh water.
　本発明の一つの態様は、上記従来技術の問題点に鑑み成されたものであって、省エネルギーで効率よく海水を淡水化できる海水淡水化装置および海水淡水化方法を提供することを目的とする。 One aspect of the present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a seawater desalination apparatus and a seawater desalination method capable of efficiently desalinating seawater with energy saving. ..
　本発明における一態様の海水淡水化装置は、海水と多価アルコールとの混合液からなる霧化溶液を霧化させて、ほぼ水からなる霧化液滴を生成する霧化分離部と、前記霧化分離部に供給する前記海水および前記多価アルコールを貯留する貯留部と、前記霧化液滴を回収する霧化液滴回収部と、を備え、前記霧化分離部は、前記霧化溶液を貯留する霧化分離槽と、前記霧化分離槽に設けられ、前記霧化溶液に対して超音波を照射する超音波発生部と、を有している。 One aspect of the seawater desalination apparatus of the present invention includes an atomization separation unit that atomizes an atomizing solution composed of a mixed solution of seawater and polyhydric alcohol to generate atomized droplets substantially composed of water. The atomization separation unit includes a storage unit for storing the seawater and the polyhydric alcohol supplied to the atomization separation unit, and an atomization droplet collection unit for collecting the atomized droplets, and the atomization separation unit is atomized. It has an atomization separation tank which stores a solution, and an ultrasonic wave generation part which is provided in the atomization separation tank and irradiates the atomized solution with ultrasonic waves.
　本発明の一態様の海水淡水化装置において、前記霧化分離部内の前記霧化溶液を濾過して析出した塩を除去する濾過部を備えている構成としてもよい。 The seawater desalination apparatus according to one aspect of the present invention may be configured to include a filter unit that filters the atomized solution in the atomization separation unit to remove the precipitated salt.
　本発明の一態様の海水淡水化装置において、前記霧化分離部に貯留された前記霧化溶液における水、海水溶質および前記多価アルコールの濃度比を管理する管理部を備えている構成としてもよい。 The seawater desalination apparatus according to one aspect of the present invention may also be configured to include a control unit that manages the concentration ratios of water, sea water-soluble and the polyhydric alcohol in the atomized solution stored in the atomization separation unit. Good.
　本発明の一態様の海水淡水化装置において、前記霧化分離槽は、前記貯留部から前記海水および前記多価アルコールが供給される供給口を有し、前記管理部は、前記供給口および前記超音波発生部から離れたところに設けられている構成としてもよい。 In the seawater desalination apparatus of one aspect of the present invention, the atomization separation tank has a supply port to which the seawater and the polyhydric alcohol are supplied from the storage unit, and the management unit is the supply port and the said. It may be configured so as to be provided apart from the ultrasonic wave generation unit.
　本発明の一態様の海水淡水化装置において、前記管理部は、前記霧化溶液の屈折率を測定する屈折率測定器と、前記霧化溶液の粘度を測定する粘度測定器と、前記霧化溶液に対する電気伝導率を測定する電気伝導率測定器と、を有する構成としてもよい。 In the seawater desalination apparatus of one aspect of the present invention, the management unit includes a refractive index measuring device for measuring the refractive index of the atomizing solution, a viscometer measuring device for measuring the viscosity of the atomizing solution, and the atomizing device. It may be configured to include an electric conductivity measuring device for measuring the electric conductivity with respect to the solution.
　本発明の一態様の海水淡水化装置において、少なくとも、前記霧化分離部、前記貯留部および前記霧化液滴回収部を接続する流路系を有し、前記流路系は、前記霧化分離部から前記霧化溶液を排出する排出流路を有している構成としてもよい。 In the seawater desalination apparatus according to one aspect of the present invention, at least a flow passage system that connects the atomization separation unit, the storage unit, and the atomized droplet collection unit is provided, and the flow channel system is the atomization device. It may be configured to have a discharge flow path for discharging the atomized solution from the separation portion.
　本発明の一態様の海水淡水化装置において、前記海水あるいは前記霧化溶液を加温する加温装置を備えている構成としてもよい。 The seawater desalination apparatus according to one aspect of the present invention may be configured to include a heating device that heats the seawater or the atomized solution.
　本発明の一態様の海水淡水化装置において、前記加温装置は、加熱部および冷却部を有するヒートポンプを備え、前記加熱部により前記海水あるいは前記霧化溶液を加熱し、前記冷却部により前記霧化液滴を冷却する構成としてもよい。 In the seawater desalination device of one aspect of the present invention, the heating device includes a heat pump having a heating unit and a cooling unit, the seawater or the atomizing solution is heated by the heating unit, and the atomization is performed by the cooling unit. It may be configured to cool the desalination droplets.
　本発明の一態様の海水淡水化装置において、前記霧化分離部と前記霧化液滴回収部との間に、前記霧化液滴に対して音波を照射する音波発生部が配置されている構成としてもよい。 In the seawater desalination apparatus according to one aspect of the present invention, a sound wave generation unit that irradiates sound waves to the atomized droplets is disposed between the atomized separation unit and the atomized droplet collection unit. It may be configured.
　本発明における一態様の海水淡水化方法は、霧化分離部において海水と多価アルコールとの混合液からなる霧化溶液を霧化させてほぼ水からなる霧化液滴を生成するとともに、前記霧化分離部に前記海水および前記多価アルコールを供給する工程と、前記霧化液滴を回収する工程と、を備えており、前記霧化分離部では、霧化分離槽に貯留された前記霧化溶液に対して超音波を照射し、前記霧化溶液の液面に液柱を形成することで前記霧化液滴を生成している、海水淡水化方法。 In the seawater desalination method of one aspect of the present invention, an atomizing solution composed of a mixed solution of seawater and polyhydric alcohol is atomized at the atomization separation section to generate atomized droplets substantially composed of water, and the above-mentioned method. The atomization separation section includes a step of supplying the seawater and the polyhydric alcohol and a step of collecting the atomized droplets, and the atomization separation section includes the step of being stored in the atomization separation tank. A seawater desalination method in which ultrasonic waves are applied to an atomized solution to form a liquid column on the liquid surface of the atomized solution to generate the atomized droplets.
　本発明の一態様の海水淡水化方法は、前記霧化分離部内の前記霧化溶液を濾過する工程を有している方法としてもよい。 The seawater desalination method according to one aspect of the present invention may be a method including a step of filtering the atomized solution in the atomization separation unit.
　本発明の一態様の海水淡水化方法は、前記霧化液滴の生成中は前記霧化溶液の組成を管理し、前記霧化分離部に対する前記海水および前記多価アルコールの供給比率を調整する方法としてもよい。 In the seawater desalination method according to one aspect of the present invention, the composition of the atomization solution is controlled during generation of the atomized droplets, and the supply ratio of the seawater and the polyhydric alcohol to the atomization separation unit is adjusted. It may be a method.
　本発明の一態様の海水淡水化方法は、前記海水あるいは前記霧化溶液を加熱して霧化を行う方法としてもよい。 The seawater desalination method of one embodiment of the present invention may be a method of heating the seawater or the atomized solution to atomize.
　本発明の一態様の海水淡水化方法は、前記霧化液滴に対して音波を照射することで液滴にする方法としてもよい。 The seawater desalination method according to one aspect of the present invention may be a method of forming droplets by irradiating the atomized droplets with sound waves.
　本発明の一態様によれば、省エネルギーで効率よく海水を淡水化できる海水淡水化装置および海水淡水化方法を提供することができる。 According to one aspect of the present invention, it is possible to provide a seawater desalination apparatus and a seawater desalination method capable of efficiently desalinating seawater with energy saving.
図１は、第１実施形態における海水淡水化装置の全体構成を示す概略図である。FIG. 1 is a schematic view showing the overall configuration of the seawater desalination apparatus according to the first embodiment. 図２は、多価アルコールの濃度と屈折率との関係を示すグラフである。FIG. 2 is a graph showing the relationship between the concentration of the polyhydric alcohol and the refractive index. 図３は、多価アルコールの濃度と粘度の関係を示すグラフである。FIG. 3 is a graph showing the relationship between the concentration of the polyhydric alcohol and the viscosity. 図４は、多価アルコールの電気伝導率と重量濃度との関係を示すグラフである。FIG. 4 is a graph showing the relationship between the electric conductivity of the polyhydric alcohol and the weight concentration. 図５は、霧化液滴回収部の構成を示す概略図である。FIG. 5 is a schematic view showing the configuration of the atomized droplet collecting portion. 図６は、霧化液滴回収部の他の構成を示す概略図である。FIG. 6 is a schematic view showing another configuration of the atomized droplet collecting portion. 図７は、三成分の組成条件を示す相関図である、また、霧化溶液Ｗ３の海水溶質（ＮａＣｌ）、水、グリセリン（多価アルコール）の三成分の濃度比を示す相関図である。FIG. 7 is a correlation diagram showing the composition conditions of the three components, and also shows the concentration ratio of the three components of the atomized solution W3, which is seawater (NaCl), water, and glycerin (polyhydric alcohol). 図８は、第２実施形態の海水淡水化装置の全体構成を示す概略図である。FIG. 8: is a schematic diagram which shows the whole structure of the seawater desalination apparatus of 2nd Embodiment. 図９は、第３実施形態の海水淡水化装置の全体構成を示す概略図である。FIG. 9 is a schematic view showing the overall configuration of the seawater desalination apparatus of the third embodiment. 図１０は、第４実施形態の海水淡水化装置の全体構成を示す概略図である。FIG. 10 is a schematic diagram showing the overall configuration of the seawater desalination apparatus of the fourth embodiment. 図１１は、音波発生部の位置を拡大して示す図である。FIG. 11 is an enlarged view showing the position of the sound wave generating portion.
[第1実施形態]
　以下、本発明の第1実施形態の海水淡水化装置１００について説明する。
　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]
Hereinafter, the seawater desalination apparatus 100 according to the first embodiment of the present invention will be described.
In each of the following drawings, in order to make each component easy to see, the scale of dimensions may be different depending on the component.
　図１は、第１実施形態における海水淡水化装置１００の全体構成を示す概略図である。図２は、多価アルコールの濃度と屈折率との関係を示すグラフである。図３は、多価アルコールの濃度と粘度の関係を示すグラフである。図４は、多価アルコールの電気伝導率と重量濃度との関係を示すグラフである。図５は、霧化液滴回収部１５の構成を示す概略図である。図６は、霧化液滴回収部１５の他の構成を示す概略図である。 FIG. 1 is a schematic diagram showing the overall configuration of a seawater desalination apparatus 100 according to the first embodiment. FIG. 2 is a graph showing the relationship between the concentration of the polyhydric alcohol and the refractive index. FIG. 3 is a graph showing the relationship between the concentration of polyhydric alcohol and the viscosity. FIG. 4 is a graph showing the relationship between the electric conductivity of the polyhydric alcohol and the weight concentration. FIG. 5 is a schematic diagram showing the configuration of the atomized droplet recovery unit 15. FIG. 6 is a schematic diagram showing another configuration of the atomized droplet recovery unit 15.
　図１に示すように、本実施形態の海水淡水化装置１００は、海水貯留部（貯留部）１１、霧化分離部１２、濾過部１３、多価アルコール貯留部（貯留部）１４、霧化液滴回収部１５、管理部１６、流路系１９および制御部３を有して構成されている。 As shown in FIG. 1, a seawater desalination apparatus 100 according to the present embodiment includes a seawater storage unit (storage unit) 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit (storage unit) 14, and atomization. It is configured to have a droplet collection unit 15, a management unit 16, a flow path system 19 and a control unit 3.
　海水貯留部１１は、海水Ｗ１を貯留する。海水Ｗ１の主成分は塩化ナトリウムであり、塩分濃度は３．５％である。海水貯留部１１は、第１供給流路１９Ａを介して霧化分離部１２に接続されており、第１供給流路１９Ａ上に配置された供給ポンプＰ１の駆動によって、海水貯留部１１に貯留された海水Ｗ１が霧化分離部１２へと供給されるようになっている。 The seawater storage unit 11 stores seawater W1. The main component of seawater W1 is sodium chloride, and the salinity is 3.5%. The seawater storage unit 11 is connected to the atomization separation unit 12 via the first supply flow path 19A, and is stored in the seawater storage unit 11 by driving the supply pump P1 arranged on the first supply flow path 19A. The separated seawater W1 is supplied to the atomization separation unit 12.
　多価アルコール貯留部１４は、海水Ｗ１に添加する所定の多価アルコールＷ２を貯留する。多価アルコール貯留部１４は、第２供給流路１９Ｂを介して霧化分離部１２に接続されており、第２供給流路１９Ｂ上に配置された供給ポンプＰ２の駆動によって、多価アルコール貯留部１４に貯留された多価アルコールＷ２が霧化分離部１２へと供給されるようになっている。 The polyhydric alcohol storage unit 14 stores a predetermined polyhydric alcohol W2 added to the seawater W1. The polyhydric alcohol storage unit 14 is connected to the atomization separation unit 12 via the second supply flow path 19B, and the polyhydric alcohol storage unit 14 is driven by the supply pump P2 arranged on the second supply flow path 19B. The polyhydric alcohol W2 stored in the section 14 is supplied to the atomization separation section 12.
　本実施形態では、多価アルコールＷ２として、例えばグリセリンを用いている。グリセリンは、化粧水等にも用いられる成分であるため、人が触れても問題はなく扱いやすいという利点がある。これ以外にも、多価アルコールＷ２として、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等が挙げられる。これら多価アルコールＷ２のなかでも、グリセリン、エチレングリコール、トリエチレングリコールは、粘度調整が容易で水との溶解度も高く、水との分離も可能である。 In this embodiment, for example, glycerin is used as the polyhydric alcohol W2. Since glycerin is a component that is also used in lotions and the like, it has an advantage that it is easy to handle without any problems even if it is touched by humans. Other than this, examples of the polyhydric alcohol W2 include propanediol, butanediol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol, triethylene glycol and the like. Among these polyhydric alcohols W2, glycerin, ethylene glycol, and triethylene glycol can be easily adjusted in viscosity, have high solubility in water, and can be separated from water.
　霧化分離部１２は、霧化分離槽（貯留槽）１２１と超音波振動子（超音波発生部）１２２とを少なくとも備えている。
　霧化分離槽１２１の内部空間１２１ｃには、これら海水貯留部１１および多価アルコール貯留部１４のそれぞれから第１供給流路１９Ａおよび第２供給流路１９Ｂを通じて供給される、海水Ｗ１と多価アルコールＷ２との混合液からなる霧化溶液Ｗ３が貯留される。 The atomization separation unit 12 includes at least an atomization separation tank (storage tank) 121 and an ultrasonic vibrator (ultrasonic generation unit) 122.
Into the internal space 121c of the atomization separation tank 121, the seawater W1 and the polyhydric water supplied from the seawater storage unit 11 and the polyhydric alcohol storage unit 14 through the first supply passage 19A and the second supply passage 19B, respectively. An atomization solution W3 made of a mixed liquid with alcohol W2 is stored.
　本実施形態の霧化分離槽１２１は、第１供給流路１９Ａが接続される第１供給口（供給口）１２１ａと、第２供給流路１９Ｂが接続される第２供給口（供給口）１２１ｂとの２つの供給口を有しているが、霧化分離槽１２１よりも前段側（上流側）に第１供給流路１９Ａと第２供給流路１９Ｂとの合流点を設ける場合は供給口を１つにしてもよい。 In the atomization separation tank 121 of the present embodiment, the first supply port (supply port) 121a to which the first supply flow path 19A is connected and the second supply port (supply port) to which the second supply flow path 19B is connected are connected. Although it has two supply ports with 121b, it is supplied when a confluence point between the first supply flow path 19A and the second supply flow path 19B is provided on the front stage side (upstream side) of the atomization separation tank 121. You may have one mouth.
　超音波振動子１２２は、液柱Ｓを発生させるための超音波を発振する。本実施形態では、１つの超音波振動子１２２のみ図示しているが、超音波振動子１２２の数は適宜変更でき、複数設けてもよい。 The ultrasonic vibrator 122 oscillates ultrasonic waves for generating a liquid column S. In the present embodiment, only one ultrasonic vibrator 122 is shown, but the number of ultrasonic vibrators 122 can be changed as appropriate, and a plurality of ultrasonic vibrators 122 may be provided.
　超音波振動子１２２は、霧化分離槽１２１の底面１２１ｅに対して傾斜して設けられていることが好ましい。超音波振動子１２２の超音波照射面１２２ａの中心から超音波照射面１２２ａに対して垂直な軸を超音波の放射軸Ｊと定義する。超音波振動子１２２が霧化分離槽１２１の底面１２１ｅに対して傾斜していることにより、超音波は、放射軸Ｊが霧化溶液Ｗ３の液面９に対して傾くように、超音波照射面１２２ａから液面９に向けて伝搬される。これにより、液面９で反射した超音波が超音波振動子１２２に戻りにくくなり、超音波振動子１２２が超音波によるダメージを受けにくくなるという利点がある。 The ultrasonic transducer 122 is preferably provided so as to be inclined with respect to the bottom surface 121e of the atomization separation tank 121. The axis perpendicular to the ultrasonic irradiation surface 122a from the center of the ultrasonic irradiation surface 122a of the ultrasonic vibrator 122 is defined as the ultrasonic radiation axis J. Since the ultrasonic transducer 122 is inclined with respect to the bottom surface 121e of the atomization separation tank 121, the ultrasonic waves are irradiated with ultrasonic waves so that the radiation axis J is inclined with respect to the liquid surface 9 of the atomization solution W3. It is propagated from the surface 122a toward the liquid surface 9. This has the advantage that the ultrasonic waves reflected by the liquid surface 9 are less likely to return to the ultrasonic vibrator 122, and the ultrasonic vibrator 122 is less likely to be damaged by the ultrasonic waves.
　霧化分離槽１２１に貯留されている霧化溶液Ｗ３に対して超音波振動子１２２から超音波が照射されると、霧化溶液Ｗ３の液面９に液柱Ｓが形成され、液柱Ｓの表面から水分が分離されてナノミスト（霧化液滴）が発生する。超音波振動子１２２から霧化溶液Ｗ３に超音波が照射される際、超音波の出力および周波数など、超音波発生条件を調整することにより、霧化溶液Ｗ３の液面９に所定の高さの霧化溶液Ｗ３の液柱Ｓを生じさせることができる。 When ultrasonic waves are applied to the atomized solution W3 stored in the atomized separation tank 121 from the ultrasonic transducer 122, a liquid column S is formed on the liquid surface 9 of the atomized solution W3, and the liquid column S The water is separated from the surface of the to produce nano mist (atomized droplets). When the atomizing solution W3 is irradiated with ultrasonic waves from the ultrasonic transducer 122, the liquid level 9 of the atomizing solution W3 has a predetermined height by adjusting the ultrasonic wave generation conditions such as the output and frequency of the ultrasonic waves. The liquid column S of the atomized solution W3 can be generated.
　本実施形態では、霧化分離部１２において、海水に多価アルコールを添加してなる霧化溶液Ｗ３を霧化させてほぼ水からなるナノミスト（霧化液滴）Ｎを生成し、海水Ｗ１に含まれる水分の少なくとも一部を霧化分離する。生成されたナノミストＮは、流路系１９を介して霧化液滴回収部１５へと送られる。
　ここで、「ほぼ水からなるナノミスト」とは、水比重量分率が９９．９％以上のミストである。 In the present embodiment, the atomization separation unit 12 atomizes the atomization solution W3 obtained by adding the polyhydric alcohol to the seawater to generate the nanomist (atomization droplets) N that is substantially water, and then the seawater W1. At least a part of the contained water is atomized and separated. The generated nanomist N is sent to the atomized droplet collecting unit 15 via the flow path system 19.
Here, the “nanomist consisting essentially of water” is a mist having a water specific weight fraction of 99.9% or more.
　管理部１６は、霧化分離槽１２１に貯留された霧化溶液Ｗ３の屈折率を測定する屈折率測定器と、霧化溶液Ｗ３の粘度を測定する粘度測定器と、霧化溶液Ｗ３に対する電気伝導率を測定する電気伝導率測定器と、を少なくとも有するモニタリング計器１６１を備えている。 The management unit 16 includes a refractive index measuring device for measuring the refractive index of the atomizing solution W3 stored in the atomizing separation tank 121, a viscometer measuring device for measuring the viscosity of the atomizing solution W3, and electricity for the atomizing solution W3. A monitoring instrument 161 having at least an electric conductivity measuring instrument for measuring the conductivity is provided.
　図２に示すように、多価アルコールＷ２において、屈折率はその濃度に対して単調に増加する傾向にあり、多価アルコールＷ２の濃度によって霧化溶液Ｗ３の屈折率が変動する。このため、屈折率測定器により霧化溶液Ｗ３の屈折率を測定することで、霧化溶液Ｗ３における多価アルコールＷ２の濃度を識別することが可能となる。 As shown in FIG. 2, in the polyhydric alcohol W2, the refractive index tends to increase monotonically with respect to the concentration, and the refractive index of the atomizing solution W3 fluctuates depending on the concentration of the polyhydric alcohol W2. Therefore, the concentration of the polyhydric alcohol W2 in the atomized solution W3 can be identified by measuring the refractive index of the atomized solution W3 with the refractive index measuring device.
　また、図３に示すように、多価アルコールＷ２において、粘度はその濃度に対して単調に増加する傾向にあり、多価アルコールＷ２の濃度によって霧化溶液Ｗ３の粘度が変動する。このため、粘度測定器によって霧化溶液Ｗ３の粘度を測定することで、霧化溶液Ｗ３における多価アルコールＷ２の濃度を識別することが可能となる。 Further, as shown in FIG. 3, in the polyhydric alcohol W2, the viscosity tends to increase monotonically with respect to the concentration, and the viscosity of the atomizing solution W3 fluctuates depending on the concentration of the polyhydric alcohol W2. Therefore, the concentration of the polyhydric alcohol W2 in the atomized solution W3 can be identified by measuring the viscosity of the atomized solution W3 with the viscosity meter.
　さらに、図４に示すように、霧化溶液Ｗ３における塩分（塩化カルシウム、塩化リチウム）の重量濃度は、その電気伝導率に対して単調に増加する傾向にあり、塩分は濃度によって電気伝導率が大きく変動する。このため、電気伝導率測定器を設けることによって霧化溶液Ｗ３の塩分濃度を識別することが可能となる。海水Ｗ１の主成分は塩化ナトリウムであるが、塩化カルシウム、塩化リチウムも含まれる。図４には記載していないが、塩化ナトリウムにおいても重量濃度は電気伝導率に対して単調に増加する傾向にある。 Further, as shown in FIG. 4, the weight concentration of the salt (calcium chloride, lithium chloride) in the atomizing solution W3 tends to increase monotonically with respect to the electric conductivity, and the electric conductivity of the salt depends on the concentration. It fluctuates greatly. Therefore, it is possible to identify the salt concentration of the atomized solution W3 by providing the electric conductivity measuring device. The main component of seawater W1 is sodium chloride, but calcium chloride and lithium chloride are also included. Although not shown in FIG. 4, the weight concentration of sodium chloride also tends to monotonically increase with respect to the electric conductivity.
　このような複数の測定器を備えたモニタリング計器１６１は、少なくとも霧化動作中において、霧化分離部１２内に貯留されている霧化溶液Ｗ３の組成状態をモニタリングし、制御部３にフィードバックする。本実施形態では、霧化溶液Ｗ３の各組成における屈折率、粘度、電気伝導率のデータベースを予め構築しておき、モニタリング計器１６１における各測定器によるそれぞれの結果に応じて、制御部３においてポンプＰ１，Ｐ２，Ｐ３，Ｐ４の出力を制御することにより、霧化溶液Ｗ３における水、海水溶質（塩分）、多価アルコールの濃度比を管理している。 The monitoring instrument 161 provided with such a plurality of measuring instruments monitors the composition state of the atomizing solution W3 stored in the atomizing separation unit 12 and feeds it back to the control unit 3 at least during the atomizing operation. .. In the present embodiment, a database of the refractive index, viscosity, and electric conductivity of each composition of the atomizing solution W3 is constructed in advance, and the control unit 3 pumps according to the results of each measuring instrument in the monitoring instrument 161. By controlling the outputs of P1, P2, P3, and P4, the concentration ratio of water, sea water soluble matter (salt content), and polyhydric alcohol in the atomized solution W3 is managed.
　本実施形態における管理部１６は、霧化分離槽１２１内に貯留されている霧化溶液Ｗ３の水位を測定する水位測定部１８を備えていることが好ましい。霧化溶液Ｗ３の水位は、霧化効率が最大になるように霧化溶液Ｗ３の組成に応じて調整してもよいし、超音波振動子１２２の数、出力等によって調整してもよい。 The management unit 16 in the present embodiment preferably includes a water level measurement unit 18 that measures the water level of the atomized solution W3 stored in the atomization separation tank 121. The water level of the atomization solution W3 may be adjusted according to the composition of the atomization solution W3 so as to maximize the atomization efficiency, or may be adjusted by the number of ultrasonic transducers 122, the output, and the like.
　また、管理部１６は、霧化分離槽１２１内に貯留されている霧化溶液Ｗ３を撹拌する撹拌部を別途備えていてもよい。上述した超音波振動子１２２によっても霧化溶液Ｗ３は撹拌されるが、撹拌部１６３によって霧化溶液Ｗ３を積極的に撹拌することで、多価アルコールＷ２の濃度ムラをより抑えることができる。 Further, the management unit 16 may separately include a stirring unit that stirs the atomized solution W3 stored in the atomization separation tank 121. The atomizing solution W3 is also agitated by the ultrasonic vibrator 122 described above, but the concentration unevenness of the polyhydric alcohol W2 can be further suppressed by actively agitating the atomizing solution W3 by the stirring unit 163.
　モニタリング計器１６１は、霧化分離槽１２１のうち、供給される海水Ｗ１によって多価アルコールＷ２の濃度が低くなりやすい第１供給口（供給口）１２１ａや、供給される多価アルコールＷ２によって多価アルコールＷ２の濃度が高まりやすい第２供給口（供給口）１２１ｂから離れたところに配置されていることが好ましい。また、霧化によって塩分濃度が高まりやすい超音波振動子１２２からも離れたところに配置されていることが好ましい。例えば、霧化分離槽１２１のうち、上述した撹拌部の近傍に設けられていることがより好ましい。これにより、霧化溶液Ｗ３の組成をより正確に測定することができる。 In the monitoring instrument 161, among the atomization separation tank 121, the first supply port (supply port) 121a in which the concentration of the polyhydric alcohol W2 tends to be lowered by the supplied seawater W1 and the polyhydric alcohol W2 supplied are used. It is preferable that the alcohol W2 is arranged at a location away from the second supply port (supply port) 121b where the concentration of the alcohol W2 tends to increase. Further, it is preferable to be arranged at a position away from the ultrasonic transducer 122 where the salt concentration is likely to increase due to atomization. For example, in the atomization separation tank 121, it is more preferable that the atomization separation tank 121 is provided in the vicinity of the above-mentioned stirring portion. Thereby, the composition of the atomized solution W3 can be measured more accurately.
　霧化分離槽１２１の後段側には、濾過部１３が接続されている。
　濾過部１３は、排出循環流路１９Ｃおよび供給循環流路１９Ｄを介して霧化分離槽１２１に接続されており、霧化分離槽１２１内に貯留されている霧化溶液Ｗ３を濾過して析出した塩を取り除く機能を有する。取り除いた塩Ｅは、濾過部１３に接続された塩排出流路１９Ｊを介して塩回収部７において回収される。回収した塩Ｅは他の用途において再利用することも可能である。 The filtration unit 13 is connected to the rear side of the atomization separation tank 121.
The filtration unit 13 is connected to the atomization separation tank 121 via the discharge circulation flow path 19C and the supply circulation flow path 19D, and filters and deposits the atomization solution W3 stored in the atomization separation tank 121. It has the function of removing the salt. The removed salt E is recovered in the salt recovery unit 7 via the salt discharge flow path 19J connected to the filtration unit 13. The recovered salt E can be reused for other purposes.
　排出循環流路１９Ｃおよび供給循環流路１９Ｄのうち少なくとも排出循環流路１９Ｃは、霧化分離槽１２１の底部側であって、霧化分離槽１２１内に貯留される霧化溶液Ｗ３の液面９よりも常に下位になる箇所に設けられる。これにより、霧化分離槽１２１内から霧化溶液Ｗ３を効率よく取り出して濾過を行うことができる。 Of the discharge circulation flow path 19C and the supply circulation flow path 19D, at least the discharge circulation flow path 19C is the bottom side of the atomization separation tank 121, and the liquid level of the atomization solution W3 stored in the atomization separation tank 121. It is provided at a position that is always lower than 9. Thereby, the atomized solution W3 can be efficiently taken out from the atomization separation tank 121 and filtered.
　制御部３は、管理部１６から計測結果がフィードバックされると、予め構築しておいた上記データベースに基づいて、流路系１９に設けられた複数のポンプＰ１，Ｐ２，Ｐ３，Ｐ４を個々に制御し、霧化分離槽１２１内に貯留する海水および多価アルコールＷ２の供給量、濾過スピード、排水量をそれぞれ調整することで、霧化溶液Ｗ３の組成を管理することが可能である。 When the measurement result is fed back from the management unit 16, the control unit 3 individually operates the plurality of pumps P1, P2, P3, P4 provided in the flow path system 19 based on the previously constructed database. It is possible to control the composition of the atomized solution W3 by controlling and adjusting the supply amount, filtration speed, and drainage amount of seawater and polyhydric alcohol W2 stored in the atomization separation tank 121, respectively.
　霧化分離槽１２１には、これよりも後段側に配置された霧化液滴回収部１５が接続されている。霧化液滴回収部１５では、霧化分離部１２において生成されたナノミストを回収し、液体に戻すことで淡水を得ている。霧化液滴回収部１５は、ミスト送出流路１９Ｇを介して霧化分離槽１２１に接続されている。ミスト送出流路１９Ｇは、霧化分離槽１２１の壁部１２１ｄの上部側であって、霧化分離槽１２１内に貯留される霧化溶液Ｗ３の水位よりも常に上位になる箇所に接続されている。これにより、霧化分離槽１２１内に貯留された霧化溶液Ｗ３を流入させることなく、生成されたナノミストＮを含む気体Ａ１を効率よく霧化液滴回収部１５へ送り出すことができる。 The atomization separation tank 121 is connected to the atomization droplet collection unit 15 arranged on the rear side of the atomization separation tank 121. The atomized droplet collecting unit 15 collects the nanomist generated in the atomizing separation unit 12 and returns it to a liquid to obtain fresh water. The atomized droplet recovery unit 15 is connected to the atomization separation tank 121 via the mist delivery flow path 19G. The mist delivery flow path 19G is connected to a portion on the upper side of the wall portion 121d of the atomization separation tank 121 and always higher than the water level of the atomization solution W3 stored in the atomization separation tank 121. There is. As a result, the gas A1 containing the generated nanomist N can be efficiently sent out to the atomized droplet collecting unit 15 without causing the atomized solution W3 stored in the atomization separation tank 121 to flow in.
　霧化液滴回収部１５としては、例えば、図５に示すように、親水性吸着材１５１を利用した構成としてもよい。親水性吸着材１５１は、水分子を吸着させる親水性能の高いナノ細孔シリカ粒子やチタニア粒子が分散されたもので、筐体１５２内に複数設けられている。互いに離間して配置された複数の親水性吸着材１５１どうしの間を、霧化分離部１２から送られてきたナノミストＮを含む気体Ａ１が流動することで、上述したナノ細孔シリカ粒子等において水分が回収され、淡水Ｗが得られる。 As the atomized droplet collecting unit 15, for example, as shown in FIG. 5, a hydrophilic adsorbent 151 may be used. The hydrophilic adsorbent 151 is a dispersion of nanoporous silica particles or titania particles having high hydrophilicity for adsorbing water molecules, and a plurality of hydrophilic adsorbents 151 are provided in the housing 152. The gas A1 containing nanomist N sent from the atomization separation unit 12 flows between the plurality of hydrophilic adsorbents 151 arranged apart from each other, whereby in the above-mentioned nanopore silica particles and the like. Moisture is recovered and fresh water W is obtained.
　霧化液滴回収部１５の後段には淡水排出流路１９Ｅを介して淡水貯留槽８が接続されており、当該淡水貯留槽８において、霧化液滴回収部１５で得られた淡水Ｗが貯留される。さらに、霧化液滴回収部１５は、空気供給流路１９Ｆを介して霧化分離槽１２１に接続されており、水分が除去されて除湿された乾燥空気Ａ２を、空気供給流路１９Ｆを介して霧化分離部１２へと送られる構成となっている。 A freshwater storage tank 8 is connected to the subsequent stage of the atomized droplet collection unit 15 via a freshwater discharge flow path 19E, and in the freshwater storage tank 8, the freshwater W obtained by the atomized droplet collection unit 15 is It is stored. Further, the atomized droplet collecting unit 15 is connected to the atomizing separation tank 121 via the air supply flow path 19F, and the dry air A2 from which moisture has been removed and dehumidified is passed through the air supply flow path 19F. It is configured to be sent to the atomization separation unit 12.
　霧化液滴回収部１５は、親水性吸着材１５１を備えた構成に限られず、例えば、図６に示すように、所定の間隔で配置された複数のフィン１５３と、これら複数のフィン１５３を跨ぐようにして配置された熱交換パイプ１５４と、コンプレッサー１５５とを用いて、熱交換パイプ１５４で冷媒を循環させることによってナノミストＮを冷却し、淡水Ｗを得る構成を採用してもよい。 The atomized droplet collecting unit 15 is not limited to the configuration provided with the hydrophilic adsorbent 151. For example, as shown in FIG. 6, a plurality of fins 153 arranged at predetermined intervals and the plurality of fins 153 are provided. A configuration may be adopted in which the nanomist N is cooled by circulating the refrigerant in the heat exchange pipe 154 using the heat exchange pipe 154 arranged so as to straddle the heat exchange pipe 154 and the compressor 155 to obtain fresh water W.
　また、サクロン、シェブロンおよびデミスタなどの機械衝突作用によってナノミストを液体化し、淡水を得る構成を採用してもよい。
　なお、冷却熱交換作用と機械衝突作用とを組み合わせた構成にしてもよい。 Further, a configuration may be adopted in which nanomist is liquefied by mechanical collision action such as sacron, chevron and demista to obtain fresh water.
The cooling heat exchange action and the mechanical collision action may be combined.
　次に、海水淡水化装置１００の運転時における霧化溶液Ｗ３の組成条件について述べる。
　図７は、霧化溶液Ｗ３の海水溶質（ＮａＣｌ）、水、グリセリン（多価アルコール）の三成分の濃度比を示す相関図である。 Next, composition conditions of the atomized solution W3 during operation of the seawater desalination apparatus 100 will be described.
FIG. 7 is a correlation diagram showing the concentration ratios of the three components of the atomized solution W3: seawater (NaCl), water, and glycerin (polyhydric alcohol).
　　海水Ｗ１の塩分は、塩化ナトリウム（ＮａＣｌ）が主成分である。発明者は、海水Ｗ１を再現した海水濃度３．５％の塩化ナトリウム水溶液、飽和濃度２６．５％の塩化ナトリウム水溶液に対してそれぞれ超音波霧化を行い、水だけを分離できるか試したが、生成されるマイクロミスト中には塩化ナトリウムが漏洩してしまい、水だけを回収するのは難しいことが分かった。図７に「マイクロミスト発生領域Ｒ３」の範囲を示す。
　このため、塩化ナトリウム水溶液を超音波霧化して淡水を得るためには、マイクロミストからさらに水のみを分離する分離プロセスが後段において必要となってしまう。 The salt of seawater W1 is mainly composed of sodium chloride (NaCl). The inventor performed ultrasonic atomization of a sodium chloride aqueous solution having a seawater concentration of 3.5% and a sodium chloride aqueous solution having a saturation concentration of 26.5%, which reproduced seawater W1, and tested whether only water could be separated. , Sodium chloride leaked into the generated micromist, and it was found that it was difficult to recover only water. FIG. 7 shows the range of the “micromist generation region R3”.
Therefore, in order to ultrasonically atomize the sodium chloride aqueous solution to obtain fresh water, a separation process for further separating only water from the micromist is required in the subsequent stage.
　そこで、発明者は、塩化ナトリウム水溶液（海水）に多価アルコールＷ２を混合することで三成分系にし、霧化溶液Ｗ３の粘度をうまく調整できる状態にして霧化を行ったところ、ほぼ水のみからなるナノミストＮを生成することが可能となり、水だけを分離して回収することができた。このように、水だけを回収するためには、霧化溶液Ｗ３の組成条件が重要となる。本発明の一態様の海水淡水化装置１００は、霧化分離部１２における霧化溶液Ｗ３の多価アルコールＷ２の濃度バランスを調整することが可能である。 Therefore, the inventor made a three-component system by mixing a polyhydric alcohol W2 with an aqueous sodium chloride solution (seawater), and atomized the solution W3 in a state where the viscosity could be adjusted well. As a result, almost only water was used. It became possible to generate nanomist N composed of, and only water could be separated and recovered. As described above, in order to recover only water, the composition conditions of the atomizing solution W3 are important. The seawater desalination apparatus 100 of one aspect of the present invention can adjust the concentration balance of the polyhydric alcohol W2 of the atomized solution W3 in the atomization separation unit 12.
　そこで、塩化ナトリウム水溶液に対してグリセリンを加えていくと、ある領域からマイクロミストが減少し、ナノミストＮが多く生成されるようになった。つまり、霧化溶液Ｗ３におけるグリセリンの割合が増えていくと、生成されるミストに漏洩する塩化ナトリウムの量が少なくなって、ほぼ水のみからなるナノミストＮだけを生成することができた。図７に「ナノミスト発生領域Ｒ１」の範囲を示す。 Then, when glycerin was added to the sodium chloride aqueous solution, the micromist decreased from a certain area, and a large amount of nanomist N was generated. That is, as the proportion of glycerin in the atomizing solution W3 increased, the amount of sodium chloride leaked to the produced mist decreased, and only nanomist N consisting almost exclusively of water could be produced. FIG. 7 shows the range of the “nanomist generation region R1”.
　海水Ｗ１から淡水Ｗを得るためには、海水淡水化装置１００の運転中、霧化溶液Ｗ３の組成条件を、上述した「ナノミスト発生領域Ｒ１」内に維持することが重要である。この「ナノミスト発生領域Ｒ１」における霧化溶液Ｗ３の組成条件を「初期条件」とする。 In order to obtain freshwater W from seawater W1, it is important to maintain the composition conditions of the atomizing solution W3 within the above-mentioned "nano mist generation region R1" during the operation of the seawater desalination apparatus 100. The composition condition of the atomized solution W3 in the "nano mist generation region R1" is referred to as "initial condition".
（海水淡水化方法）
　次に、海水淡水化装置１００を用いた海水淡水化方法について述べる。
　まず、第１供給流路１９Ａおよび第２供給流路１９Ｂ上に配置されたポンプＰ１，Ｐ２を駆動させることで、海水貯留部１１から霧化分離槽１２１に対して海水Ｗ１を供給するとともに、多価アルコール貯留部１４から霧化分離槽１２１に対してグリセリンなどの多価アルコールＷ２を供給する。 (Seawater desalination method)
Next, a seawater desalination method using the seawater desalination apparatus 100 will be described.
First, the seawater W1 is supplied from the seawater storage unit 11 to the atomization separation tank 121 by driving the pumps P1 and P2 arranged on the first supply flow path 19A and the second supply flow path 19B, Polyhydric alcohol W2 such as glycerin is supplied from the polyhydric alcohol storage unit 14 to the atomization separation tank 121.
　このとき、管理部１６のモニタリング計器１６１によって、霧化分離槽１２１内に供給された海水Ｗ１と多価アルコールＷ２との混合液、つまり、霧化溶液Ｗ３における屈折率、粘度、電気伝導率を計測し、多価アルコールＷ２の濃度をモニタリングする。霧化溶液Ｗ３の組成が上述した「初期条件」になるまで、海水Ｗ１および多価アルコールＷ２の供給を行う。 At this time, the monitoring instrument 161 of the control unit 16 determines the refractive index, viscosity, and electrical conductivity of the mixed solution of seawater W1 and polyhydric alcohol W2 supplied into the atomization separation tank 121, that is, the atomization solution W3. Measure and monitor the concentration of polyhydric alcohol W2. Seawater W1 and polyhydric alcohol W2 are supplied until the composition of the atomizing solution W3 reaches the above-mentioned "initial conditions".
　次に、超音波振動子１２２を駆動することで、霧化分離槽１２１内に貯留された初期条件の霧化溶液Ｗ３に対して超音波を照射し、液柱Ｓを形成することで、霧化溶液Ｗ３を高く持ち上げる。 Next, by driving the ultrasonic transducer 122, ultrasonic waves are applied to the atomized solution W3 stored in the atomization separation tank 121 under the initial condition, and the liquid column S is formed. Lift the chemical solution W3 high.
　また、超音波振動子１２２を駆動させるのとほぼ同時期に、空気供給流路１９Ｆ内に被設けられたファン１７を駆動させることで、霧化分離槽１２１内に空気を供給し、液柱Ｓに接触させることでナノミストＮを生じさせる。生成されるナノミストＮはほぼ水からなり、霧化溶液Ｗ３から水のみが分離される。 Further, at about the same time as driving the ultrasonic vibrator 122, the fan 17 provided in the air supply flow path 19F is driven to supply air into the atomization separation tank 121, and the liquid column is supplied. By contacting with S, nanomist N is generated. The generated nanomist N is almost composed of water, and only water is separated from the atomized solution W3.
　生成されたナノミストＮを含む気体Ａ１は、ミスト送出流路１９Ｇを介して霧化液滴回収部１５へと送られる。霧化液滴回収部１５において、複数配列された親水性吸着材１５１どうしの間を上記気体Ａ１が通過する際に、気体Ａ１に含まれるナノミストＮが多数のナノ細孔シリカ粒子に吸着されて集められ、液体となった淡水Ｗは淡水排出流路１９Ｅを介して淡水貯留槽８に排出されて回収される。 The gas A1 containing the generated nanomist N is sent to the atomized droplet collection unit 15 via the mist delivery flow path 19G. In the atomized droplet collecting unit 15, when the gas A1 passes between the plurality of arranged hydrophilic adsorbents 151, the nanomist N contained in the gas A1 is adsorbed by a large number of nanopore silica particles. The fresh water W that has been collected and turned into a liquid is discharged to the fresh water storage tank 8 through the fresh water discharge flow path 19E and collected.
　一方、霧化液滴回収部１５において水分が除去されて除湿された乾燥空気は、空気供給流路１９Ｆを介して霧化分離部１２へと送られる。 On the other hand, the dry air that has been dehumidified by removing water in the atomized droplet recovery unit 15 is sent to the atomization separation unit 12 via the air supply flow path 19F.
　海水淡水化装置１００では、連続運転によって霧化分離を継続していくと、霧化溶液Ｗ３から水分が徐々に分離されて組成条件が初期条件から変動してくる。 In the seawater desalination apparatus 100, when atomization separation is continued by continuous operation, water is gradually separated from the atomization solution W3, and the composition condition changes from the initial condition.
　霧化溶液Ｗ３の組成が「初期条件」から外れてしまうと、水のみを分離、回収するのが難しくなってしまう。また、霧化溶液Ｗ３の組成が「初期条件」から外れていなくても、水の分離、回収に伴って塩分濃度が高まり、霧化溶液Ｗ３の組成バランスが変動して図２に示す「不飽和領域Ｒ２」との境界ラインＫ上に到達すると、液柱ＳによってナノミストＮが生成されるのと同時に塩が析出されるという現象が生じる。つまり、霧化溶液Ｗ３における塩分濃度が高い状況下で液柱Ｓが形成されると、部分的にさらに高濃度になっていくので、局所的に塩が析出される。そのため、析出した塩を常に濾過しながら霧化を行わなければならず、霧化効率が低下してしまう。 If the composition of the atomizing solution W3 deviates from the "initial conditions", it becomes difficult to separate and recover only water. Further, even if the composition of the atomizing solution W3 does not deviate from the "initial conditions", the salt concentration increases with the separation and recovery of water, and the composition balance of the atomizing solution W3 fluctuates, which is shown in FIG. When it reaches the boundary line K with the saturated region R2", a phenomenon occurs in which the liquid mist S produces the nanomist N and at the same time the salt is precipitated. That is, when the liquid column S is formed under the condition where the salt concentration in the atomized solution W3 is high, the concentration is further increased locally, so that salt is locally deposited. Therefore, the precipitated salt must be atomized while being constantly filtered, and the atomization efficiency is lowered.
　そのため、霧化を行っている間、モニタリング計器１６１によって霧化溶液Ｗ３における各組成の濃度比率をモニタリングし、海水貯留部１１から海水Ｗ１を霧化分離槽１２１へ定常的に供給するとともに、供給した海水Ｗ１の量に対応する多価アルコールＷ２を多価アルコール貯留部１４から適宜供給する。 Therefore, during the atomization, the concentration ratio of each composition in the atomized solution W3 is monitored by the monitoring instrument 161 and the seawater W1 is constantly supplied and supplied from the seawater storage unit 11 to the atomization separation tank 121. The polyhydric alcohol W2 corresponding to the amount of the seawater W1 is appropriately supplied from the polyhydric alcohol storage unit 14.
　一方、多価アルコールＷ２を供給することなく海水Ｗ１のみを定常的に供給し、濾過を行いながら霧化を行う場合は、霧化溶液Ｗ３の組成が、「初期条件」の中でも「不飽和領域Ｒ２」との境界ラインＫ上に制限されてしまう。 On the other hand, when only seawater W1 is constantly supplied without supplying the polyhydric alcohol W2 and atomization is performed while filtering, the composition of the atomizing solution W3 is an "unsaturated region" even in the "initial conditions". It is limited to the boundary line K with "R2".
　そのため、「初期条件」の中でより霧化効率を高めたい場合は、霧化溶液Ｗ３の組成が「不飽和領域Ｒ２」との境界ラインＫ側に傾いてきたときに、所定量の多価アルコールＷ２を供給する。このとき、多価アルコールＷ２の供給量だけでなく、海水Ｗ１の供給量、超音波の出力、濾過スピードも管理することで、霧化溶液Ｗ３の組成を、上記境界ラインＫ上の条件から離れる方向、例えば、図７に示した「ナノミスト発生領域Ｒ１」の中央に向かう方向へ戻しながら霧化を行う。 Therefore, when it is desired to further increase the atomization efficiency under the "initial conditions", when the composition of the atomization solution W3 is inclined toward the boundary line K side with the "unsaturated region R2", a predetermined amount of multivalued value is obtained. Supply alcohol W2. At this time, by controlling not only the supply amount of the polyhydric alcohol W2 but also the supply amount of seawater W1, the output of ultrasonic waves, and the filtration speed, the composition of the atomizing solution W3 is separated from the condition on the boundary line K. Atomization is performed while returning to the direction, for example, the direction toward the center of the "nano mist generation region R1" shown in FIG.
　超音波霧化によって生成されるナノミストＮには、海水溶質がほとんど含まれておらず、ほぼ淡水のミストが生成される。 Nanomist N produced by ultrasonic atomization contains almost no seawater, and almost freshwater mist is generated.
　このように、本実施形態の海水淡水化装置１００によれば、海水に多価アルコールＷ２を添加することで、超音波霧化を行った段階でほぼ水からなるナノミストＮを生成することができることから、従来のような分離装置を用いてミストから淡水をさらに分離する必要もなくなり、省エネルギーでより効率よく淡水を回収することが可能となる。 As described above, according to the seawater desalination apparatus 100 of the present embodiment, by adding the polyhydric alcohol W2 to the seawater, it is possible to generate nanomist N almost composed of water at the stage of ultrasonic atomization. Therefore, it is not necessary to further separate the fresh water from the mist by using the conventional separation device, and it becomes possible to recover the fresh water more efficiently with energy saving.
　また、装置運転中、管理部１６により霧化溶液Ｗ３の組成を常時モニタリングしながら、海水溶質および多価アルコールＷ２の濃度比を「ナノミスト発生領域Ｒ１」に留めるよう、海水と多価アルコールとの供給比率および濾過スピード等を制御し、霧化溶液Ｗ３の組成を「初期条件」に維持することによって、霧化分離部１２において液柱Ｓが良好に形成され、霧化によるナノミストＮの生成効率を高めることができる。このように、霧化効率を維持しながら海水淡水化装置１００を連続運転することが可能なため、多量の海水Ｗ１を効率よく淡水化することができる。 In addition, during the operation of the apparatus, the control unit 16 constantly monitors the composition of the atomized solution W3, and the concentration ratio of the seawater-soluble substance and the polyhydric alcohol W2 is kept in the "nano mist generation region R1". By controlling the supply ratio, filtration speed, etc., and maintaining the composition of the atomizing solution W3 in the "initial conditions", the liquid column S is satisfactorily formed in the atomization separation section 12, and the production efficiency of nanomist N by atomization Can be enhanced. As described above, since the seawater desalination apparatus 100 can be continuously operated while maintaining the atomization efficiency, a large amount of seawater W1 can be efficiently desalinated.
　なお、本実施形態では、海水貯留部１１および多価アルコール貯留部１４をそれぞれ備え、霧化分離部１２において海水Ｗ１と多価アルコールＷ２とが混合される構成となっているが、海水Ｗ１および多価アルコールＷ２を予め混合させておき、「初期条件」に調整した初期条件液を貯留する初期条件液供給部を、海水貯留部１１および多価アルコール貯留部１４に代えて設けてもよい。 In the present embodiment, the seawater storage unit 11 and the multivalent alcohol storage unit 14 are provided, respectively, and the atomization separation unit 12 mixes the seawater W1 and the multivalent alcohol W2. The initial condition liquid supply unit in which the polyhydric alcohol W2 is mixed in advance and the initial condition liquid adjusted to the “initial condition” is stored may be provided in place of the seawater storage unit 11 and the polyhydric alcohol storage unit 14.
　また、本実施形態の流路系１９は、霧化分離部１２から霧化溶液Ｗ３を排出する霧化溶液排出流路（排出流路）１９Ｈを有している。霧化分離部１２からの霧化溶液Ｗ３の排出量を調整することによって、霧化溶液Ｗ３における海水溶質と多価アルコールＷ２との濃度比をより効率よく管理することができる。 Further, the flow path system 19 of the present embodiment has an atomized solution discharge flow path (discharge flow path) 19H for discharging the atomized solution W3 from the atomization separation unit 12. By adjusting the discharge amount of the atomizing solution W3 from the atomizing separation unit 12, the concentration ratio of the seawater-soluble substance and the polyhydric alcohol W2 in the atomizing solution W3 can be controlled more efficiently.
［第２実施形態］
　次に、本発明の第２実施形態の海水淡水化装置２００について説明する。
　以下に示す本実施形態の海水淡水化装置２００の基本構成は、上記第１実施形態と略同様であるが、加温装置２１を備えた点において異なる。よって、以下の説明では、先の実施形態と異なる点について詳しく説明し、共通な箇所の説明は省略する。また、説明に用いる各図面において、先の実施形態と共通する構成要素には同一の符号を付すものとする。 [Second Embodiment]
Next, the seawater desalination apparatus 200 of the second embodiment of the present invention will be described.
The basic configuration of the seawater desalination device 200 of the present embodiment shown below is substantially the same as that of the first embodiment, except that the heating device 21 is provided. Therefore, in the following description, points different from the previous embodiment will be described in detail, and description of common points will be omitted. Moreover, in each drawing used for the description, the same reference numerals are given to the constituent elements common to the above-described embodiment.
　図８は、第２実施形態の海水淡水化装置２００の全体構成を示す概略図である。
　本実施形態の海水淡水化装置２００は、海水貯留部１１、霧化分離部１２、濾過部１３、多価アルコール貯留部１４、霧化液滴回収部１５、管理部１６、流路系１９および制御部３を備えるとともに、さらに加温装置２１を備えている。 FIG. 8: is a schematic diagram which shows the whole structure of the seawater desalination apparatus 200 of 2nd Embodiment.
The seawater desalination apparatus 200 of the present embodiment includes a seawater storage unit 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit 14, an atomized droplet collection unit 15, a management unit 16, a flow path system 19, and The controller 3 is provided, and the heating device 21 is further provided.
　加温装置２１は、海水貯留部１１と霧化分離部１２との間の第１供給流路１９Ａ上に配置され、海水貯留部１１から霧化分離部１２へ供給される海水Ｗ１を加温する。本実施形態における加温装置２１は、例えば太陽熱を利用したものであるが、これに限らない。 The warming device 21 is arranged on the first supply flow path 19A between the seawater storage unit 11 and the atomization separation unit 12, and heats the seawater W1 supplied from the seawater storage unit 11 to the atomization separation unit 12. To do. The heating device 21 in the present embodiment uses, for example, solar heat, but is not limited to this.
　また、多価アルコールＷ２と霧化分離部１２との間の第２供給流路１９Ｂ上にも加温装置２１を配置してもよい。海水Ｗ１および多価アルコールＷ２の両方を加温させてもよいし、どちらか一方だけでもよい。 Further, the heating device 21 may be arranged on the second supply flow path 19B between the polyhydric alcohol W2 and the atomization separation unit 12. Both the seawater W1 and the polyhydric alcohol W2 may be heated, or only one of them may be heated.
　また、霧化分離部１２に加温装置２１を付加し、霧化溶液Ｗ３を加温させるようにしてもよい。
　海水Ｗ１、多価アルコールＷ２、霧化溶液Ｗ３のうちのいずれかを加温させることにより、霧化分離部１２における霧化効率を高めることができる。 Further, a heating device 21 may be added to the atomization separation unit 12 to heat the atomization solution W3.
By heating any one of seawater W1, polyhydric alcohol W2, and atomization solution W3, the atomization efficiency in the atomization separation unit 12 can be increased.
［第３実施形態］
　次に、本発明の第３実施形態の海水淡水化装置３００について説明する。
　以下に示す本実施形態の海水淡水化装置３００の基本構成は、上記第１実施形態と略同様であるが、ヒートポンプ３１を備えた点において異なる。よって、以下の説明では、先の実施形態と異なる点について詳しく説明し、共通な箇所の説明は省略する。また、説明に用いる各図面において、先の実施形態と共通する構成要素には同一の符号を付すものとする。 [Third Embodiment]
Next, a seawater desalination apparatus 300 according to the third embodiment of the present invention will be described.
The basic configuration of the seawater desalination apparatus 300 of the present embodiment shown below is substantially the same as that of the first embodiment, except that the heat pump 31 is provided. Therefore, in the following description, points different from the previous embodiment will be described in detail, and description of common points will be omitted. Further, in each of the drawings used for the description, the same reference numerals are given to the components common to the above-described embodiments.
　図９は、第３実施形態の海水淡水化装置３００の全体構成を示す概略図である。
　本実施形態の海水淡水化装置３００は、海水貯留部１１、霧化分離部１２、濾過部１３、多価アルコール貯留部１４、霧化液滴回収部１５、管理部１６、流路系１９および制御部３を備えるとともに、さらにヒートポンプ３１を備えている。本実施形態の霧化液滴回収部１５は、ヒートポンプ３１の冷却部３３における冷却作用によってナノミストＮを液滴にして回収し、淡水を得ている。 FIG. 9 is a schematic diagram showing the overall configuration of the seawater desalination apparatus 300 of the third embodiment.
The seawater desalination apparatus 300 of this embodiment includes a seawater storage unit 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit 14, an atomized droplet collection unit 15, a management unit 16, a flow path system 19, and The heat pump 31 is further provided in addition to the control unit 3. The atomized droplet collecting unit 15 of the present embodiment collects nanomist N as droplets by a cooling action in the cooling unit 33 of the heat pump 31 to obtain fresh water.
　具体的には、図６で示したような熱交換パイプ１５４で冷媒を循環させることによってナノミストＮを含む気体を冷却しており、本実施形態では、この際得られる冷却熱（吸熱）を利用して海水Ｗ１を加温させる構成となっている。 Specifically, the gas containing nanomist N is cooled by circulating the refrigerant through the heat exchange pipe 154 as shown in FIG. 6, and in the present embodiment, the cooling heat (endothermic) obtained at this time is used. Then, the seawater W1 is heated.
　コンプレッサー３４で冷媒を圧縮することで冷媒の温度を上昇させ、加熱された冷媒を加熱部３２に供給して熱交換パイプ１５４で循環させることにより、海水貯留部１１から霧化分離部１２へと送られる海水Ｗ１を加温させている。 The temperature of the refrigerant is raised by compressing the refrigerant with the compressor 34, and the heated refrigerant is supplied to the heating unit 32 and circulated through the heat exchange pipe 154 to move from the seawater storage unit 11 to the atomization separation unit 12. The seawater W1 to be sent is heated.
　本実施形態では、ヒートポンプ３１の加熱部３２および冷却部３３におけるそれぞれの作用を利用することにより、ナノミストＮを効率よく液体化できるとともに、このときの冷却熱を利用して海水Ｗ１を加熱するため、省エネルギーで霧化効率を高めることができる。 In the present embodiment, the nano mist N can be efficiently liquefied by utilizing the respective actions of the heating unit 32 and the cooling unit 33 of the heat pump 31, and the cooling heat at this time is used to heat the seawater W1. , Energy saving can improve atomization efficiency.
［第４実施形態］
　次に、本発明の第４実施形態の海水淡水化装置４００について説明する。
　以下に示す本実施形態の海水淡水化装置３００の基本構成は、上記第３実施形態と略同様であるが、音波発生部４１を備えた点において異なる。よって、以下の説明では、先の実施形態と異なる点について詳しく説明し、共通な箇所の説明は省略する。また、説明に用いる各図面において、先の実施形態と共通する構成要素には同一の符号を付すものとする。 [Fourth Embodiment]
Next, the seawater desalination apparatus 400 according to the fourth embodiment of the present invention will be described.
The basic configuration of the seawater desalination apparatus 300 of the present embodiment shown below is substantially the same as that of the third embodiment, except that the sound wave generating unit 41 is provided. Therefore, in the following description, points different from the previous embodiment will be described in detail, and description of common points will be omitted. Moreover, in each drawing used for the description, the same reference numerals are given to the constituent elements common to the above-described embodiment.
　図１０は、第４実施形態の海水淡水化装置４００の全体構成を示す概略図である。図１１は、音波発生部４１の配置位置を拡大して示す図である。
　本実施形態の海水淡水化装置４００は、海水貯留部１１、霧化分離部１２、濾過部１３、多価アルコール貯留部１４、霧化液滴回収部１５、管理部１６、流路系１９および制御部３、ヒートポンプ３１を備えるとともに、音波発生部４１をさらに備えている。 FIG. 10: is a schematic diagram which shows the whole structure of the seawater desalination apparatus 400 of 4th Embodiment. FIG. 11 is an enlarged view showing the arrangement position of the sound wave generator 41.
The seawater desalination apparatus 400 of the present embodiment includes a seawater storage unit 11, an atomization separation unit 12, a filtration unit 13, a polyhydric alcohol storage unit 14, an atomized droplet collection unit 15, a management unit 16, a flow path system 19, and A control unit 3 and a heat pump 31 are provided, and a sound wave generating unit 41 is further provided.
　図１０および図１１に示すように、霧化分離部１２と霧化液滴回収部１５との間のミスト送出流路１９Ｇ上に音波発生部４１を設け、ナノミストＮを含む気体Ａ１に対して音波を照射することで、音の振動によってナノミストＮを粗大化することができる。例えば、図１１の一点鎖線で示す領域においてナノミストを凝集させることができ、このようにして粗大化したミストを含む気体を霧化液滴回収部１５へ供給することによって、霧化液滴回収部１５において淡水を回収するプロセスを省エネ化することが可能である。 As shown in FIGS. 10 and 11, a sound wave generating unit 41 is provided on the mist sending flow path 19G between the atomizing separation unit 12 and the atomized droplet collecting unit 15 with respect to the gas A1 containing nanomist N. By irradiating sound waves, nanomist N can be coarsened by vibration of sound. For example, the nanomist can be aggregated in the region shown by the alternate long and short dash line in FIG. 11, and the atomized droplet collecting unit 15 is supplied with the gas containing the mist coarsened in this way. It is possible to save energy in the process of recovering fresh water at 15.
　音波発生部４１としてスピーカーを用い、例えば音域が１００～１０００Ｈｚの音波を発生させることが好ましい。 It is preferable to use a speaker as the sound wave generating unit 41, for example, to generate a sound wave having a sound range of 100 to 1000 Hz.
　以上、添付図面を参照しながら本発明に係る好適な実施形態について説明したが、本発明は係る例に限定されないことは言うまでもない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。

  The preferred embodiment of the present invention has been described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to the example. It is obvious to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims, and naturally, the technical scope of the present invention is also applicable to them. Be understood to belong to.

Claims (14)

  1. 　海水と多価アルコールとの混合液からなる霧化溶液を霧化させて、ほぼ水からなる霧化液滴を生成する霧化分離部と、
    　前記霧化分離部に供給する前記海水および前記多価アルコールを貯留する貯留部と、
    　前記霧化液滴を回収する霧化液滴回収部と、
    を備え、
    　前記霧化分離部は、前記霧化溶液を貯留する霧化分離槽と、前記霧化分離槽に設けられ、前記霧化溶液に対して超音波を照射する超音波発生部と、を有している、
    海水淡水化装置。     An atomization separation unit that atomizes an atomization solution composed of a mixed solution of seawater and a polyhydric alcohol to generate atomized droplets composed of almost water,
    A storage unit for storing the seawater and the polyhydric alcohol supplied to the atomization separation unit,
    An atomized droplet collecting unit that collects the atomized droplets and
    Equipped with
    The atomization separation unit includes an atomization separation tank for storing the atomization solution and an ultrasonic generation unit provided in the atomization separation tank for irradiating the atomization solution with ultrasonic waves. ing,
    Seawater desalination equipment.
  2. 　前記霧化分離部内の前記霧化溶液を濾過して析出した塩を除去する濾過部を備えている、
    請求項１に記載の海水淡水化装置。     The atomizing and separating unit is provided with a filtering unit for filtering the atomized solution to remove precipitated salt.
    The seawater desalination apparatus according to claim 1.
  3. 　前記霧化分離部に貯留された前記霧化溶液における水、海水溶質および前記多価アルコールの濃度比を管理する管理部を備えている、
    請求項１または２に記載の海水淡水化装置。     Water in the atomization solution stored in the atomization separation unit, a sea water-soluble substance, and a management unit for managing the concentration ratio of the polyhydric alcohol are provided.
    The seawater desalination apparatus according to claim 1 or 2.
  4. 　前記霧化分離槽は、前記貯留部から前記海水および前記多価アルコールが供給される供給口を有し、
    　前記管理部は、前記供給口および前記超音波発生部から離れたところに設けられている、
    請求項３に記載の海水淡水化装置。     The atomization separation tank has a supply port to which the seawater and the polyhydric alcohol are supplied from the storage section,
    The management unit is provided at a location away from the supply port and the ultrasonic wave generation unit.
    The seawater desalination apparatus according to claim 3.
  5. 　前記管理部は、前記霧化溶液の屈折率を測定する屈折率測定器と、前記霧化溶液の粘度を測定する粘度測定器と、前記霧化溶液に対する電気伝導率を測定する電気伝導率測定器と、を有する、
    請求項３または４に記載の海水淡水化装置。     The management unit is a refractive index measuring device for measuring the refractive index of the atomized solution, a viscosity measuring device for measuring the viscosity of the atomized solution, and an electrical conductivity measurement for measuring the electrical conductivity of the atomized solution. And a container,
    The seawater desalination apparatus according to claim 3 or 4.
  6. 　少なくとも、前記霧化分離部、前記貯留部および前記霧化液滴回収部を接続する流路系を有し、
    　前記流路系は、前記霧化分離部から前記霧化溶液を排出する排出流路を有している、
    請求項１から５のいずれか一項に記載の海水淡水化装置。     At least a flow path system connecting the atomization separation section, the storage section and the atomized droplet collection section,
    The flow path system has a discharge flow path for discharging the atomized solution from the atomization separation unit,
    The seawater desalination apparatus according to any one of claims 1 to 5.
  7. 　前記海水あるいは前記霧化溶液を加温する加温装置を備えている、
    請求項１から６のいずれか一項に記載の海水淡水化装置。     A heating device for heating the seawater or the atomized solution is provided,
    The seawater desalination apparatus according to any one of claims 1 to 6.
  8. 　前記加温装置は、加熱部および冷却部を有するヒートポンプを備え、
    　前記加熱部により前記海水あるいは前記霧化溶液を加熱し、
    　前記冷却部により前記霧化液滴を冷却する構成とされている、
    請求項７に記載の海水淡水化装置。     The heating device includes a heat pump having a heating unit and a cooling unit,
    The seawater or the atomized solution is heated by the heating unit,
    It is configured to cool the atomized droplets by the cooling unit,
    The seawater desalination apparatus according to claim 7.
  9. 　前記霧化分離部と前記霧化液滴回収部との間に、前記霧化液滴に対して音波を照射する音波発生部が配置されている、
    請求項１から８のいずれか一項に記載の海水淡水化装置。     Between the atomization separation unit and the atomized droplet collection unit, a sound wave generation unit that emits sound waves to the atomized liquid droplets is disposed.
    The seawater desalination apparatus according to any one of claims 1 to 8.
  10. 　霧化分離部において海水と多価アルコールとの混合液からなる霧化溶液を霧化させて
    ほぼ水からなる霧化液滴を生成するとともに、前記霧化分離部に前記海水および前記多価アルコールを供給する工程と、
    　前記霧化液滴を回収する工程と、を備えており、
    　前記霧化分離部では、霧化分離槽に貯留された前記霧化溶液に対して超音波を照射し、前記霧化溶液の液面に液柱を形成することで前記霧化液滴を生成している、
    海水淡水化方法。     In the atomization separation unit, an atomization solution consisting of a mixed liquid of seawater and polyhydric alcohol is atomized to generate atomized droplets consisting of almost water, and in the atomization separation unit, the seawater and the polyhydric alcohol. And the process of supplying
    And a step of collecting the atomized droplets,
    In the atomization separation section, the atomization solution stored in the atomization separation tank is irradiated with ultrasonic waves to form a liquid column on the liquid surface of the atomization solution to generate the atomized droplets. doing,
    Seawater desalination method.
  11. 　前記霧化分離部内の前記霧化溶液を濾過する工程を有している、
    請求項１０に記載の海水淡水化方法。     The method has a step of filtering the atomized solution in the atomization separation unit,
    The seawater desalination method according to claim 10.
  12. 　前記霧化液滴の生成中は前記霧化溶液の組成を管理し、
    　前記霧化分離部に対する前記海水および前記多価アルコールの供給比率を調整する、
    請求項１０または１１に記載の海水淡水化方法。     Managing the composition of the atomized solution during the generation of the atomized droplets,
    Adjusting the supply ratio of the seawater and the polyhydric alcohol to the atomization separation section.
    The seawater desalination method according to claim 10 or 11.
  13. 　前記海水あるいは前記霧化溶液を加熱して霧化を行う、
    請求項１０から１２のいずれか一項に記載の海水淡水化方法。     Atomization is performed by heating the seawater or the atomization solution,
    The seawater desalination method according to any one of claims 10 to 12.
  14. 　前記霧化液滴に対して音波を照射することで液滴にする、
    請求項１０から１３のいずれか一項に記載の海水淡水化方法。     By irradiating the atomized droplets with sound waves, they are made into droplets.
    The seawater desalination method according to any one of claims 10 to 13.
PCT/JP2020/008395 2019-03-06 2020-02-28 Seawater desalination device and seawater desalination method WO2020179689A1 (en)

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JP2003535223A (en) * 2000-05-25 2003-11-25 マイクロリス・コーポレイシヨン Regeneration of plating bath
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JP2001314724A (en) * 2000-02-28 2001-11-13 Honke Matsuura Shuzojo:Kk Alcohol separator from alcoholic solution
JP2003535223A (en) * 2000-05-25 2003-11-25 マイクロリス・コーポレイシヨン Regeneration of plating bath
JP2007237140A (en) * 2006-03-13 2007-09-20 Matsushita Electric Ind Co Ltd Desalination device
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