JP2023009315A - Ultrasonic atomization and separation device - Google Patents

Abstract

To provide an ultrasonic atomization and separation device which can efficiently recover generated mist.SOLUTION: An ultrasonic atomization and separation device includes a container which has a space for storing a mixed solution containing water and other components other than the water, an ultrasonic radiation mechanism which radiates an ultrasonic wave in the mixed solution and scatters mist containing the water from the mixed solution, a coarsening part which coarsens the mist with a hydroscopic chemical species as a nucleus and generates coarsened mist, a charging part which charges the coarsened mist and generates charged mist, and an electrostatic collection part which electrostatically collects the charged mist.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to ultrasonic atomization separation devices.

In ultrasonic atomization separation, ultrasonic waves are radiated into a mixed solution containing a separated component and other components to generate a mist containing the separated component.

Patent Document 1 discloses that a target region made of air containing water vapor is irradiated with ultraviolet laser light having a wavelength of 270 nm to 180 nm to generate water droplets or ice grains in the target region.

Japanese Patent No. 4527020

Most of the mist generated by radiating ultrasonic waves into the mixed solution has a particle size of 1 micron or less. And mist with a particle size of 1 micron or less has a very short lifespan and evaporates before it can be collected. Therefore, it may be difficult to efficiently collect mist generated by radiating ultrasonic waves into the mixed solution.

The present disclosure has been made in view of this problem. An object of one aspect of the present disclosure is to provide an ultrasonic atomization separation device capable of efficiently collecting the generated mist.

An ultrasonic atomization separation device according to one aspect of the present disclosure includes a container having a space for accommodating a mixed solution containing water and other components other than water, and an ultrasonic wave radiating into the mixed solution. an ultrasonic radiation mechanism for scattering the water-containing mist from the mixed solution; a coarsening unit for coarsening the mist with a hygroscopic chemical species as a nucleus to generate coarse mist; and charging the coarse mist. A charging unit that generates charging mist, and an electrostatic collection unit that electrostatically collects the charging mist.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which illustrates the ultrasonic atomization separation apparatus of 1st Embodiment typically. 4 is a graph showing the relationship between relative moisture saturation RS and relative humidity RH when hydrogen peroxide concentrations are 40 ppm and 120 ppm. Fig. 2 is a cross-sectional view schematically illustrating a first example of a discharge structure provided in the ultrasonic atomization separation device of the first embodiment; FIG. 4 is a cross-sectional view schematically illustrating a second example of a discharge structure provided in the ultrasonic atomization separation device of the first embodiment; 5 is a graph illustrating changes in particle size distribution of mist according to the first example of the discharge structure provided in the ultrasonic atomization separation device of the first embodiment. 5 is a graph illustrating changes in particle size distribution of mist according to the first example of the discharge structure provided in the ultrasonic atomization separation device of the first embodiment. It is a sectional view showing typically the ultrasonic atomization separation device of a 2nd embodiment. It is a cross-sectional view schematically illustrating an ultrasonic atomization separation device of a third embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

1. First Embodiment 1.1 Outline of Ultrasonic Atomization/Separation Device FIG. 1 is a cross-sectional view schematically illustrating an ultrasonic atomization/separation device of a first embodiment.

The ultrasonic atomization separation device 1 of the first embodiment illustrated in FIG. 1 performs ultrasonic atomization separation. That is, the ultrasonic atomization separation device 1 atomizes at least part of the water contained in the mixed solution S into mist, and separates at least part of the water from other components other than water contained in the mixed solution S. do. The water separated from the other components may be all of the water contained in the mixed solution S, or may be part of the water contained in the mixed solution S.

The ultrasonic atomization separation device 1 may be used alone as a dehumidifier, or may be incorporated in a humidity control device that absorbs water in the air. When the ultrasonic atomization separation device 1 is incorporated in a humidity control device, the ultrasonic atomization separation device 1 separates water absorbed by the humidity control liquid from the humidity control liquid to regenerate the humidity control liquid. The ultrasonic atomization separation device 1 collects nano-mist from the water generated when the humidity control liquid is regenerated.

As shown in FIG. 1, the ultrasonic atomization separation device 1 includes an atomization tank 11, a gas flow generation unit 12, an eliminator 13, a coarsening unit 14, a charging unit 15, an electrostatic collection unit 16, and a water recovery unit. A tank 17 is provided.

The atomization tank 11 scatters a mist M containing water from the mixed solution S. When the ultrasonic atomization separation device 1 is incorporated in a humidity control device, the atomization tank 11 functions as a regeneration tank for regenerating the humidity control liquid.

As illustrated in FIG. 1 , the atomization tank 11 includes a container 21 and an ultrasonic radiation mechanism 22 .

A space 21 s is formed in the container 21 . 21 s of spaces accommodate the mixed solution S. FIG.

The ultrasonic wave emitting mechanism 22 emits an ultrasonic wave U into the contained mixed solution S to scatter the mist M from the mixed solution S. The scattered mist M is a fine mist consisting only of water.

As illustrated in FIG. 1 , the ultrasonic radiation mechanism 22 includes a power source 31 , an oscillator circuit 32 and a transducer 33 .

A power supply 31 supplies power to the oscillation circuit 32 .

The oscillator circuit 32 operates using the supplied power. The oscillation circuit 32 oscillates a drive signal and supplies the oscillated drive signal to the vibrator 33 .

The vibrator 33 emits an ultrasonic wave U according to the supplied drive signal. Ultrasonic waves U are radiated from the radiation surface 33 a of the transducer 33 .

A vibrator 33 is fixed to the bottom of the container 21 . A radiation surface 33a of the vibrator 33 faces vertically upward. Therefore, the vibrator 33 radiates the ultrasonic waves U upward in the vertical direction. The radiated ultrasonic wave U propagates through the mixed solution S to the liquid surface Sa of the mixed solution S. As a result, the liquid column P rises from the liquid surface Sa of the mixed solution S. Mist M is scattered from the rising liquid column P.

The vibrator 33 has a flat plate shape. The vibrator 33 may have a shape other than a flat plate shape. For example, the vibrator 33 may have a lens-like shape.

The ultrasonic wave U desirably has a frequency of 1 MHz or more and 5 MHz or less.

The gas flow generation unit 12 passes through the gas flow generation unit 12, the atomization tank 11, the eliminator 13, the coarsening unit 14, the charging unit 15, and the electrostatic collection unit 16 in order from the outside of the ultrasonic atomization separation device 1. As a result, a gas flow F of the carrier gas that flows to the outside of the ultrasonic atomization separation device 1 is generated. The carrier gas is dry air or the like. The gas flow F carries the mist M from the atomization tank 11 to the coarsening section 14 via the eliminator 13, and carries the coarsened mist M2 generated in the coarsening section 14 from the coarsening section 14 to the charging section 15. , carries the charging mist M3 generated in the charging section 15 from the charging section 15 to the electrostatic collection section 16. As shown in FIG.

The eliminator 13 removes coarse mist containing other components scattered from the mixed solution S in the atomization tank 11 . As a result, it is possible to prevent other components from being mixed with the recovered water S1 generated by recovering the mist M.

The coarsening unit 14 coarsens the mist M with the hygroscopic chemical species as the nucleus to generate the coarsened mist M2.

The coarsening unit 14 generates radicals by electric discharge, reacts the generated radicals to generate hygroscopic chemical species, and generates coarse mist M2 using the generated hygroscopic chemical species as nuclei. Hygroscopic species include, for example, hydrogen peroxide. Formation of coarse mist M2 with hygroscopic species as nuclei is possible even in humid air with a relative humidity of less than 100 RH%. Therefore, the ultrasonic atomization separation device 1 can recover water from humid air having a relative humidity of less than 100 RH%. The discharge is accompanied by the creation of an atmospheric pressure plasma.

The mist M is a nano-mist having a nanometer-order size. Therefore, the mist M evaporates and decreases more easily than bulk water. For this reason, the mist M has a short lifetime compared to bulk water. Coarsification of the mist M by the coarsening unit 14 is selected from the group consisting of coarsening the mist remaining without being evaporated and re-misting the vapor generated by the evaporation of the mist M. At least one type is included. The generated coarsened mist M2 has a lifespan longer than the lifespan of the mist M. Thereby, the ultrasonic atomization separation apparatus 1 can collect the generated mist M efficiently.

An internal space 14 s is formed in the coarsened portion 14 . A gas flow F of carrier gas passes through the internal space 14s. Thereby, the mist M carried by the gas flow F of the carrier gas passes through the internal space 14s. The coarsening unit 14 generates a coarsened mist M2 in the internal space 14s where the mist M exists.

The charging unit 15 charges the generated coarsened mist M2 to generate charged mist M3.

The charging section 15 includes a charging electrode 41 and a power source 42 . A space 15 s is formed in the charging unit 15 . The charging electrode 41 is arranged in the space 15s. A gas flow F of carrier gas passes through the space 15s. Thereby, the coarsened mist M2 carried by the gas flow F of the carrier gas passes through the space 15s. The power supply 42 applies a voltage to the charging electrodes 41 to generate discharge between the charging electrodes 41 . Thereby, the charging unit 15 generates discharge in the space 15s where the coarsened mist M2 exists. Thereby, the charging unit 15 charges the coarse mist M2 in the space 15s where the coarse mist M2 exists to generate the charged mist M3.

The electrostatic collection unit 16 electrostatically collects the charged mist M3 to generate bulk water.

The electrostatic collector 16 includes a collector electrode 51 and a power source 52 . A space 16 s is formed in the electrostatic collector 16 . The collecting electrode 51 is arranged in the space 16s. A gas flow F of carrier gas passes through the space 16s. Thereby, the charged mist M3 carried by the gas flow F of the carrier gas passes through the space 16s. The power supply 52 applies a voltage to the collecting electrodes 51 to generate an electric field between the collecting electrodes 51 . Thereby, the electrostatic collector 16 generates an electric field in the space 16s where the charged mist M3 exists. Thereby, the electrostatic collection unit 16 electrostatically collects the charged mist M3 on the collector electrode 51 to generate bulk water on the collector electrode 51 .

The charged mist M3 is positively charged. For this reason, the electrostatic collection unit 16 electrostatically collects the charged mist M3 on the collection electrode 51 serving as the negative electrode.

Bulk water produced is directed to a water recovery tank 17 . As a result, the water recovery tank 17 is filled with the recovered water S1. This completes the water recovery flow.

The coarsening section 14 desirably generates radicals and hygroscopic chemical species by generating electric discharge in the internal space 14s where the mist M is present. The element for causing the electrostatic collection section 16 to generate discharge can also serve as the element for causing the coarsening section 14 to generate discharge. Therefore, when the coarsening section 14 generates electric discharge to generate radicals and hygroscopic chemical species, the structure of the ultrasonic atomization separation device 1 can be simplified. However, the coarsening unit 14 may generate radicals and hygroscopic chemical species by irradiating the internal space 14s where the mist M exists with ultraviolet rays. The coarsening unit 14 may supply radicals or hygroscopic chemical species from the outside of the internal space 14s where the mist M exists to the internal space 14s where the mist M exists.

1.2 Coarsification of Mist by Hydrogen Peroxide FIG. 2 is a graph showing the relationship between the relative moisture saturation RS and the relative humidity RH when the concentrations of hydrogen peroxide are 40 ppm and 120 ppm.

In FIG. 2, the horizontal axis represents the relative moisture saturation RS, and the vertical axis represents the relative humidity RH.

Water condensation or mist formation occurs when the relative moisture saturation RS reaches 100% RS, not when the relative humidity RH reaches 100% RH. From FIG. 2, when the hydrogen peroxide concentration is 40 ppm and 120 ppm, the relative humidity RH when the relative moisture saturation RS reaches 100% RS is 90% RH and 80% RH, respectively. can understand something. This means that if hydrogen peroxide is present, condensation of water will occur even if the relative humidity RH is less than 100% RH.

The coarsening unit 14 utilizes this fact to generate the coarsened mist M2 from high-humidity air having a relative humidity of less than 100% RH.

1.3 First Example of Discharge Structure FIG. 3 is a cross-sectional view schematically illustrating a first example of a discharge structure provided in the ultrasonic atomization/separation device of the first embodiment.

The discharge structure 61 illustrated in FIG. 3 generates a creeping discharge D1. A discharge structure 61 is arranged in the internal space 14s. Thereby, the coarsening part 14 generates creeping discharge D1 in the internal space 14s where the mist M exists. Thereby, the coarsening unit 14 generates radicals and hygroscopic chemical species in the internal space 14s where the mist M exists.

The discharge structure 61 comprises an insulator plate 71 , a planar electrode 72 , a linear electrode 73 and a high voltage power supply 74 .

The planar electrode 72 is embedded in the insulator plate 71 and arranged parallel to the main surface 71 a of the insulator plate 71 .

The linear electrodes 73 are arranged on the main surface 71 a of the insulator plate 71 .

A high-voltage power supply 74 applies a high voltage between the planar electrode 72 and the linear electrode 73 . Thereby, the discharge structure 61 generates creeping discharge D1 along the main surface 71 a of the insulator plate 71 around the linear electrode 73 . The generated creeping discharge D1 generates ozone from oxygen. The generated ozone becomes a precursor of radicals and hygroscopic species.

1.4 Second Example of Discharge Structure FIG. 4 is a cross-sectional view schematically illustrating a second example of the discharge structure provided in the ultrasonic atomization separation device of the first embodiment.

A discharge structure 81 illustrated in FIG. 4 generates a corona discharge D2. A discharge structure 81 is arranged in the internal space 14s. Thereby, the coarsening part 14 generates a corona discharge in the internal space 14s where the mist M exists. Thereby, the coarsening unit 14 generates radicals and hygroscopic chemical species in the internal space 14s where the mist M exists.

The discharge structure 81 comprises a rod electrode 91 , a rod electrode 92 , an insulator plate 93 and a high voltage electrode 94 .

The insulator plate 93 is arranged between the rod-shaped electrode 91 and the rod-shaped electrode 92 .

The high voltage electrode 94 applies a high voltage between the rod electrodes 91 and 92 . Thereby, the discharge structure 61 generates a corona discharge D<b>2 between the rod-shaped electrode 91 and the insulator plate 93 and between the rod-shaped electrode 92 and the insulator plate 93 . The generated corona discharge D2 produces ozone from oxygen. The generated ozone becomes a precursor of radicals and hydrogen peroxide.

1.5 Particle Size Distribution of Coarse Mist FIGS. 5 and 6 are graphs illustrating changes in the particle size distribution of mist according to the first example of the discharge structure provided in the ultrasonic atomization separation apparatus of the first embodiment.

5 and 6 show the initial state (initial value), immediately after discharging for 2 minutes (immediately after discharging for 2 minutes), 5 minutes after discharging for 2 minutes (after 5 minutes), and 2 minutes after discharging. It shows the particle size distribution of the mist after 10 minutes (10 minutes) after the discharge for 10 minutes. In FIGS. 5 and 6, the horizontal axis indicates the particle size, and the vertical axis indicates the number of particles.

The particle size distribution is such that the voltage value of the high voltage applied between the planar electrode 72 and the linear electrode 73 is 4.7 kV, the frequency of the high voltage is 1 to 10 kHz, and the power consumption of the discharge structure 61 is The power is about 95 W, the amount of ozone generated is 10 g/h, the ozone concentration is 1540 ppm when discharging is performed for 2 minutes, the volume of the internal space 14s is 184 liters, and the relative humidity is 95% RH. is the case where The particle size distribution was measured by an aerosol monitor. However, since it was not possible to simultaneously measure the particle size distribution in the range of 0 to 400 nm in particle size shown in FIG. 5 and the particle size distribution in the range of 300 to 1000 nm in particle size shown in FIG. and the particle size distribution of the latter are not continuous.

From FIGS. 5 and 6, it can be understood that the amount of mist having a small particle size decreases and the amount of mist having a large particle size increases as time passes after two minutes of discharge. That is, it can be understood from FIGS. 5 and 6 that coarsening of the mist is progressing.

1.6 Other Components Contained in Mixed Solution Other components contained in the mixed solution S include, for example, a hygroscopic substance.

A hygroscopic substance is a substance that dissolves in or is miscible with water. As a hygroscopic substance,
One kind of hygroscopic substance may be used alone, or two or more kinds of hygroscopic substances may be mixed and used. Hygroscopic substances include one or both of organic and inorganic materials.

The organic material includes, for example, at least one selected from the group consisting of dihydric or higher alcohols, ketones, organic solvents having an amide group, sugars, and materials used as raw materials for moisturizing cosmetics. It contains at least one selected from the group consisting of the above alcohols, organic solvents having an amide group, sugars, and materials used as raw materials for moisturizing cosmetics and the like. Bivalent or higher alcohols, organic solvents having amide groups, sugars, and materials used as raw materials for moisturizing cosmetics have high hydrophilicity. Therefore, when the organic material contains at least one selected from the group consisting of these, the hygroscopic property of the hygroscopic substance can be increased.

Dihydric or higher alcohols include, for example, at least one selected from the group consisting of glycerin, propanediol, butanediol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol and triethylene glycol.

Organic solvents having an amide group include, for example, at least one selected from the group consisting of formamide and acetamide.

Sugars include, for example, at least one selected from the group consisting of sucrose, pullulan, glucose, xylose, fructose, mannitol and sorbitol.

Materials used as raw materials for moisturizing cosmetics and the like contain at least one selected from the group consisting of 2-methacryloyloxyethylphosphorylcholine (MPC), betaine, hyaluronic acid and collagen.

Inorganic materials are, for example, the group consisting of calcium chloride, lithium chloride, magnesium chloride, potassium chloride, sodium chloride, zinc chloride, aluminum chloride, lithium bromide, calcium bromide, potassium bromide, sodium hydroxide and sodium pyrrolidonecarboxylate. at least one selected from

2. Second Embodiment In the following, points of difference between the second embodiment and the first embodiment will be described. As for the points that are not explained, the same configuration as that employed in the first embodiment is also employed in the second embodiment.

FIG. 7 is a cross-sectional view schematically illustrating the ultrasonic atomization separation device of the second embodiment.

The ultrasonic atomization separation device 2 of the second embodiment illustrated in FIG. 7 includes a recirculation path 18 and a variable flow valve 19.

An inlet 101 and an outlet 102 are formed in the coarsening portion 14 . An internal space 14 s formed in the coarsened portion 14 communicates with the inlet 101 and the outlet 102 . Inlet 101 receives gas flow F of carrier gas and mist M. FIG. From the outlet 102, a gas flow F of carrier gas and a coarsened mist M2 are emitted.

The recirculation path 18 returns a portion of the gas flow F of the carrier gas exiting from the outlet 102 to the inlet 101 without passing through the internal space 14s. Thereby, the humidity of the internal space 14s can be increased. Thereby, the efficiency of generating the coarsened mist M2 can be improved.

A variable flow valve 19 is inserted in the recirculation path 18 . The variable flow valve 19 adjusts the flow rate of the gas flow F of the carrier gas flowing through the recirculation path 18 to adjust the amount of carrier gas returned to the inlet 101 . This makes it possible to adjust the extent to which the humidity in the internal space 14s is increased.

3 Third Embodiment In the following, points of difference between the third embodiment and the first embodiment will be described. For points that are not explained, the same configuration as that employed in the first embodiment is also employed in the third embodiment.

FIG. 8 is a cross-sectional view schematically illustrating the ultrasonic atomization separation device 3 of the third embodiment.

In the ultrasonic atomization separation device 3 of the third embodiment illustrated in FIG. 8, the charging section 15 includes a negative corona discharge section 111 and a positive corona discharge section 112.

The negative corona discharge section 111 is arranged before the charging section 15 . The positive corona discharge section 112 is arranged after the charging section 15 . A front stage of the charging section 15 is located near the atomization tank 11 . The rear stage of the charging section 15 is located near the electrostatic collection section 16 .

The negative corona discharge portion 111 also serves as the coarsening portion 14 . Therefore, the negative corona discharge unit 111 generates radicals by negative corona discharge, reacts the generated radicals to generate hygroscopic chemical species, and generates coarse mist M2 using the generated hygroscopic chemical species as nuclei. do.

Further, the negative corona discharge unit 111 generates a negative corona discharge to negatively charge the first coarse mist contained in the coarse mist M2 to generate the first charged mist M31.

The positive corona discharge unit 112 generates a positive corona discharge to positively charge the second coarse mist contained in the coarse mist M2 to generate the second charged mist M32.

The positive corona discharge section 112 produces less ozone and hydrogen peroxide, reducing residual amounts of ozone and hydrogen peroxide.

As illustrated in FIG. 8 , the strip electrode 41 comprises a first rod-shaped electrode 121 and a second rod-shaped electrode 122 .

The first rod-shaped electrode 121 and the second rod-shaped electrode 122 form a bipolar structure. The first rod-shaped electrode 121 is the negative electrode. The second rod-shaped electrode 122 is a positive electrode. The first rod-shaped electrode 121 is arranged across the front and rear stages of the charging section 15 . The second rod-shaped electrode 122 is arranged across the front and rear stages of the charging section 15 .

As illustrated in FIG. 8 , the first rod-shaped electrode 121 has a tip portion 131 and a non-tip portion 132 . The second rod-like electrode 122 has a tip portion 141 and a non-tip portion 142 .

The tip portion 131 and the non-tip portion 142 are arranged in front of the charging section 15 . As a result, the tip portion 131 forming the negative electrode and the non-tip portion 132 forming the positive electrode face each other before the charging portion 15 . A negative corona discharge is generated between the tip portion 131 and the non-tip portion 142 facing each other. As a result, a negative corona discharge is generated in the front stage of the charging section 15 .

The non-tip portion 132 and the tip portion 141 are arranged behind the charging portion 15 . As a result, the non-tip portion 132 that forms the negative electrode and the tip portion 141 that forms the positive electrode face each other behind the charging portion 15 . A positive corona discharge is generated between the non-tip portion 132 and the tip portion 141 facing each other. As a result, a positive corona discharge is generated in the rear stage of the charging section 15 .

The first charged mist M31 is negatively charged. The second charged mist M32 is positively charged. Therefore, the electrostatic collection unit 16 electrostatically collects the first charged mist M31 on the collector electrode 51 serving as the positive electrode, and electrostatically collects the second charged mist M32 on the collector electrode 51 serving as the negative electrode. Electro-collect.

The present disclosure is not limited to the above embodiments, but has substantially the same configuration, the same effect, or the same purpose as the configuration shown in the above embodiment. can be replaced with

1 ultrasonic atomization separation device, 11 atomization tank, 12 gas flow generation unit, 13 eliminator, 14 coarsening unit, 14s internal space, 15 charging unit, 15s space, 16 electrostatic collection unit, 17 water recovery tank, 18 Recirculation path 19 Flow rate variable valve 31 Power supply 32 Oscillation circuit 33 Oscillator 41 Band electrode 42 Power supply 51 Collecting electrode 52 Power supply 61 Discharge structure 71 Insulator plate 72 Planar electrode 73 Linear electrode 74 High voltage power supply 81 Discharge structure 91 Rod electrode 92 Rod electrode 93 Insulator plate 94 High voltage electrode 101 Entrance 102 Exit 111 Negative corona discharge part 112 Positive corona discharge part 121 First rod-shaped electrode, 122 second rod-shaped electrode, 131 tip, 132 non-tip, 141 tip, 142 non-tip, S mixed solution, M mist, M2 coarsening mist, M3 electrified mist, F gas flow, U Ultrasonic, D1 creeping discharge, D2 corona discharge.

Claims (5)

a container formed with a space in which a mixed solution containing water and other components other than water is accommodated;
an ultrasonic emission mechanism that emits ultrasonic waves into the mixed solution to scatter mist containing the water from the mixed solution;
a coarsening unit that coarsens the mist with the hygroscopic chemical species as a nucleus to generate coarsened mist;
a charging unit that charges the coarsened mist to generate charged mist;
an electrostatic collection unit that electrostatically collects the charged mist;
An ultrasonic atomization separation device comprising: 2. The ultrasonic atomization separator of claim 1, wherein the hygroscopic species comprises hydrogen peroxide. 3. The ultrasonic atomization separation apparatus according to claim 1, wherein the coarsening section generates the hygroscopic chemical species by generating electric discharge in the space where the mist exists. The coarsening section is formed with an inlet for receiving the mist, an outlet for the coarsening mist, and an internal space communicating with the inlet and the outlet,
The coarsening unit generates the coarsening mist in the internal space,
4. The ultrasonic atomization separation device according to any one of claims 1 to 3, further comprising a recirculation path for returning the gas flow coming out of the outlet to the inlet without passing through the internal space. The charging unit includes a negative corona discharge unit that negatively charges the first coarse mist contained in the coarse mist by generating a negative corona discharge, and a positive corona discharge that charges the coarse mist to the coarse mist. a positive corona discharge unit that positively charges the contained second coarsened mist,
The ultrasonic atomization separation device according to any one of claims 1 to 4, wherein the negative corona discharge section also serves as the coarsening section.

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