JP5636173B2 - Distillation equipment - Google Patents

Description

  The present invention relates to a technique of a distillation apparatus that obtains distilled water by depressurizing a space in a main body and distilling raw water.

  Conventionally, a distillation apparatus that obtains distilled water by reducing the pressure in the space inside the main body and distilling the raw water is known. For example, an apparatus including a container capable of maintaining a space in the main body in a reduced pressure state, a container provided with a heating / cooling means for heating / cooling, and a container provided with a condensing means for condensing water vapor is known. (For example, refer to Patent Document 1). Also known is a method of producing raw material water by pressure feeding it to a densified filter.

On the other hand, in recent years, a technique using ultrafine bubbles has attracted attention. The ultrafine bubbles have characteristics such as a very large surface area and physicochemical characteristics such as a self-pressurizing effect, and by utilizing the characteristics, drainage purification, washing, body care in a bathtub, etc. The technology used for
The ultrafine bubbles have been found to have high thermal conductivity. It has been found that a liquid containing ultrafine bubbles changes more rapidly than a liquid not containing ultrafine bubbles.

JP 2002-239536 A

  However, the distillation apparatus requires a large amount of heat energy for heating and boiling the raw water. Here, when heating is performed by burning fossil energy as a heating method of raw material water, a large amount of carbon dioxide is generated, which may adversely affect the environment. In the method using a filter, large energy is used to pressurize the raw material water. In addition, it has been expensive to clean the clogged used filter.

  Therefore, in view of such a problem, the present invention is a distillation apparatus that obtains distilled water by reducing the internal space of the main body and distilling raw material water, and can distill raw material water efficiently with less energy. I will provide a.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in claim 1, a distillation apparatus main body capable of depressurizing the space in the main body, a raw water container for storing raw water provided in the distillation apparatus main body, and the distillation apparatus main body are provided. In the distillation apparatus comprising a distilled water container and a steam aggregator provided above the raw water container, the distillation apparatus generates ultrafine bubbles that protrude from the lower part of the raw water container to the inside. Provided with a heat source for heating a gas that becomes an ultrafine bubble around the ultrafine bubble generator, the ultrafine bubble generator includes a compressor for pumping a gas and the heat source. A bubble generating medium for releasing heated gas as ultrafine bubbles into the raw material water, and the bubble generating medium is formed of a porous body of a conductive carbon-based material and has a diameter of Fine holes of μm to several tens of μm are formed It is made .

According to a second aspect of the present invention, a liquid ejecting apparatus that ejects the same kind of liquid as the raw water is provided in a direction substantially orthogonal to the surface portion of the bubble generating medium.
Is.

  According to a third aspect of the present invention, the ultrafine bubble generating device includes an active oxygen generating device that generates active oxygen from oxygen in the air, and the gas released from the ultrafine bubble generating device into the raw material water is active oxygen. It is a thing.

  According to a fourth aspect of the present invention, the heat source is constituted by an electromagnetic induction device.

  In Claim 5, the said heat source is equipped with the condensing lens which condenses sunlight, and the optical fiber which guides the sunlight collected by this condensing lens to the said ultrafine-bubble generator. .

  As effects of the present invention, the following effects can be obtained.

  In claim 1, since the raw water is boiled at a low temperature by reducing the space in the distillation apparatus main body, the heat consumption energy can be reduced and the cost for distillation can be reduced. Can do. In addition, the maintenance cost can be reduced as compared with a method using a filter. Further, since the heated ultrafine bubbles generated from the ultrafine bubble generating device act on the temperature rise of the raw material water, the raw material water can be evaporated with a small amount of thermal energy. Further, since the heated ultrafine bubbles are contained in the raw material water, the evaporation speed of the raw material water is increased. In addition, since the ultrafine bubbles are cooled by transferring heat to the raw water while moving upward in the raw water, the volume continues to decrease, creating a space for generating new ultrafine bubbles, and more ultrafine bubbles. Bubbles can be generated. Further, the smaller the volume of the ultrafine bubbles, the longer the time existing in the liquid, and the number of the ultrafine bubbles present in the liquid can be increased. Further, when the ultrafine bubbles are released from the surface of the raw material water into the air, they burst, but at that time, the surface area becomes large, so that more raw material water can be evaporated.

  According to the second aspect of the present invention, since the superfine bubbles are separated from the bubble generating medium by the water flow at the moment when the superfine bubbles are generated, they can be prevented from being combined to become large bubbles, so that the ultrafine bubbles are generated by a simple method. be able to. In addition, since the ultrafine bubbles are diffused by the jet flow of the liquid jet device, the temperature of the raw material water can be quickly increased.

  In Claim 3, since the raw material water will boil at a low temperature by reducing the pressure in the space inside the distillation apparatus main body, the consumed heat energy can be reduced and the cost for distillation can be reduced. Can do. Moreover, bacteria and the like in the raw water can be sterilized by active oxygen such as ozone.

  According to the fourth aspect of the present invention, heating of the bubble generating medium can be accelerated to generate ultrafine bubbles efficiently.

  In claim 5, use of sunlight, which is a natural energy, makes it possible to distill raw material water without using any fossil fuel. There is nothing.

The partial front sectional view showing the overall configuration of the distillation apparatus. The partial front sectional view which shows the structure of a raw material water container and a bubble generation medium. The front fragmentary sectional view which shows the distillation process by a distillation apparatus. The partial front sectional view which shows the distillation process by a distillation apparatus. The front fragmentary sectional view which shows a distillation apparatus and an active oxygen production | generation apparatus. FIG. 3 is a partial front sectional view showing a heat source including a condenser lens and an optical fiber. The partial front sectional view which shows a distillation apparatus and a heat exchanger.

  Next, embodiments of the invention will be described.

First, the structure of the distillation apparatus 1 is demonstrated using FIG.1 and FIG.2.
The distillation apparatus 1 is a distillation apparatus that obtains distilled water by depressurizing a space in the main body and distilling raw water.
As shown in FIG. 1, the distillation apparatus 1 includes a distillation apparatus main body 2 that can depressurize the space in the main body, and a raw water container 3 for storing raw water provided in the distillation apparatus main body 2. The distilled water container 4 provided in the distillation apparatus main body 2, the steam aggregator 5 provided above the raw water container 3, and the raw water container 3 project from the lower part into the raw water container 3. An ultrafine bubble generating device 6 is provided.

  The distillation apparatus main body 2 is a container that can store the raw water container 3, the distilled water container 4, the steam aggregator 5, and the ultrafine bubble generator 6, and the raw water container 3, the distilled water The space part 2a as the space part in the main body in which the container 4 and the vapor aggregator 5 are arranged is sealed so as to have an equal atmospheric pressure. An air intake hole 11 is provided in a wall surface surrounding the space 2a of the distillation apparatus body 2, and the air pressure in the space 2a is reduced by sucking air inside the space 2a from the air intake hole 11. It is possible to do. The intake hole 11 has a check valve structure and prevents air from flowing in from the intake hole 11. In the present embodiment, the intake hole 11 is provided above the raw water container 3 and below the steam aggregator 5, but is not limited to this, and is in contact with the space 2a. It is also possible to change the wall surface.

  The raw water container 3 is provided in the space 2 a of the distillation apparatus main body 2. A bubble generating medium 42 constituting the ultrafine bubble generating device 6 protrudes upward from the center of the lower surface of the raw water container 3. Further, a heat insulating material 15 is disposed around the raw water container 3 so as not to exchange heat with other portions in the distillation apparatus main body 2.

  The distilled water container 4 is provided in the space 2 a of the distillation apparatus main body 2 and is provided below the steam aggregator 5. The bottom surface of the distilled water container 4 is formed in a shape combining a square frustum and a rectangular parallelepiped, and the accumulated distilled water is stored in the rectangular parallelepiped portion along the inclined surface of the square frustum, and is placed at the lower end of the rectangular parallelepiped portion. It is configured to be able to take out from the water intake 26 through the provided water intake passage 25.

The steam aggregator 5 is provided in the space 2 a of the distillation apparatus main body 2 and above the raw water container 3. The vapor aggregator 5 is formed of a high-density composite, and a passage 5 a for passing a refrigerant is provided in the vapor aggregator 5. The high-density composite constituting the vapor aggregator 5 is made of a composite ceramic having a very high heat exchange efficiency. The steam aggregator 5 includes a flat plate portion 5b provided with the passage 5a and a plurality of protruding portions 5c protruding downward from the flat plate portion 5b. In other words, the vapor aggregator 5 is formed in a comb shape when viewed from the front. By providing the plurality of protrusions 5c, the entire surface area of the vapor aggregator 5 can be increased, and the area in contact with the rising vapor can be increased.
In the present embodiment, the vapor aggregator 5 is formed in a comb shape, but the present invention is not limited to this. For example, the vapor aggregator 5 is formed in a plate shape and is disposed inside the vapor aggregator 5. It is possible to provide a plurality of passages for allowing the refrigerant to pass therethrough.

  A collecting container 30 for collecting water droplets of distilled water adhering to the vapor aggregator 5 is provided below the vapor aggregator 5. Distilled water drops collected in the collection container 30 are sent to the distilled water container 4 through a distilled water pipe 31 connected to the bottom of the collection container 30.

The ultrafine bubble generating device 6 includes a compressor 41 that is a compressor for pumping gas, and a bubble generating medium 42 for releasing the pumped gas into the raw material water as ultrafine bubbles.
The compressor 41 is a device that pumps gas to the internal space 42 a of the bubble generating medium 42 through a gas supply path (not shown). The compressor 41 is provided outside the distillation apparatus main body 2.
Further, the compressor 41 is connected to an intake hole 11 provided in the distillation apparatus main body 2. Thereby, the compressor 41 also serves as a decompressor that decompresses by sucking the air in the distillation apparatus main body 2.

The bubble generating medium 42 has a configuration in which a part of the upper portion protrudes from the raw water container 3. The bubble generation medium 42 is formed of a high density composite. The high-density composite is a conductor. For example, the conductor is made of a carbon-based material.

  The bubble generating medium 42 is provided with a plurality of internal spaces 42a, 42a, 42a extending in the longitudinal direction. The internal space 42a is a passage for guiding the air pressure-fed from the compressor 41 to the bubble generating medium 42. The shape of the internal space 42a is not limited. For example, the internal space 42a includes a single large cavity extending in the longitudinal direction. It is also possible. Further, as shown in FIG. 2, the bubble generating medium 42 has a large number of fine holes 42b, 42b,... Having a diameter of several μm to several tens of μm, and the gas pumped from the compressor 41 is It is structured to be discharged into the liquid from the hole 42b. That is, the ultrafine bubbles are discharged from the holes 42b into the liquid by the gas pressure of the gas pumped from the compressor 41. Further, when a decompressor for reducing the pressure of the space 2a is provided separately, the gas present in the internal space 42a of the bubble generating medium 42 is reduced by reducing the pressure of the space 2a by the reducer. Is released through. That is, ultrafine bubbles are discharged into the liquid from the holes 42b by the suction pressure of the decompressor.

Further, a heat source 45 is disposed around a portion of the bubble generating medium 42 that does not protrude from the raw water container 3, and a portion of the bubble generating medium 42 that contacts the heat source 45 is covered with a coating material. The coating material is an inorganic material having hardness and activity and transmitting heat, and is made of, for example, silica glass. Further, the lower surface of the bubble generating medium 42 is open.
In addition, the bubble generating medium 42 itself receives heat from the heat source 45 as a heat medium, and releases heat from a portion protruding into the raw water container 3. Thereby, the temperature of the raw material water in the raw material water container 3 will rise.

  The heat source 45 is provided below the bubble generating medium 42 and around a portion that does not protrude from the raw water container 3. The heat source 45 is composed of, for example, an electric heater, which generates heat from the heat source 45 and conducts the heat to the bubble generating medium 42 so that the internal spaces 42a, 42a,. It transfers heat to the passing gas. A heat insulating material 15 is provided on the outer periphery of the heat source 45 to prevent heat exchange.

  The heat source 45 can also be configured by an electromagnetic induction device. In this case, current is passed through the heat source 45 to generate electromagnetic induction, and the bubble generating medium 42 is heated at a high frequency. By comprising in this way, the said bubble generation medium 42 can be heated rapidly and an ultrafine bubble can be generated efficiently.

A method for producing distilled water using the thus configured distillation apparatus 1 will be described with reference to FIGS. 1, 2, 3 and 4.
Raw water is introduced into the raw water container 3. Here, the raw water is, for example, river water, groundwater, seawater, or the like. Next, while the pressure of the space 2 a in the distillation apparatus main body 2 is reduced by the compressor 41, air is pumped to the bubble generating medium 42 constituting the ultrafine bubble generating device 6. In addition, it is also possible to separately provide a decompressor for reducing the pressure in the space 2a in the distillation apparatus main body 2. The air pressure-fed to the bubble generating medium 42 by the compressor 41 is heated by the heat source 45 when passing through the bubble generating medium 42 and is heated. The heated air is ejected as ultrafine bubbles from the portion 42 b of the bubble generating medium 42 protruding into the raw water container 3 and mixed into the raw water. As a result, the raw material water is heated and boiled by receiving heat energy from the heated ultrafine bubbles. Since the atmospheric pressure in the space 2a is reduced, the temperature at which the raw material water boils is lower than 100 degrees Celsius, which is the boiling point at normal pressure.
As shown in FIG. 3, the evaporated water vapor is cooled and condensed by the vapor aggregator 5, and falls into the collection container 30 through the protrusion 5c. The drops of distilled water that have fallen into the collection container 30 drop into the distilled water container 4 through the distilled water pipe 31 connected to the bottom of the collection container 30. Here, the vapor aggregator 5 is cooled by flowing a refrigerant in the passage 5a. In this way, distilled water accumulated to some extent in the distilled water container 4 can be taken out from the water intake 26.

Further, as shown in FIG. 4, the ultrafine bubbles ejected from the holes 42b of the portion of the bubble generating medium 42 protruding into the raw water container 3 have a temperature higher than the temperature of the raw water. For this reason, the ultrafine bubbles are cooled by transferring heat to the raw water and the volume is reduced. In other words, the ultrafine bubbles are cooled by transferring heat to the raw water while moving upward in the raw water, and the volume continues to decrease. Therefore, a space for generating new ultrafine bubbles is created, and more ultrafine bubbles are created. Bubbles can be generated. Further, the smaller the volume of the ultrafine bubbles, the longer the time existing in the liquid, and the number of the ultrafine bubbles present in the liquid can be increased.
In addition, the ultrafine bubbles burst when released from the surface of the raw material water into the air, but the surface area increases at that time, so that more raw material water can be evaporated.

  Next, means for separating the ultrafine bubbles generated from the ultrafine bubble generator 6 provided in the raw water container 3 from the surface of the ultrafine bubble generator 6 will be described.

As an example of means for separating the ultrafine bubbles from the surface of the ultrafine bubble generating device 6, the liquid flow is perpendicular to the upper surface of the bubble generating medium 42 from above the bubble generating medium 42 constituting the ultrafine bubble generating device 6. The means by the liquid ejecting apparatus 51 for firing the will be described.
As shown in FIGS. 1 and 2, the liquid ejecting apparatus 51 is an apparatus for separating ultrafine bubbles generated on the surface portion 42 c of the bubble generating medium 42 by a liquid flow. The liquid ejecting apparatus 51 ejects the same type of liquid as the liquid from which the ultrafine bubbles are released. That is, the raw water is sucked up by the pump 53 from the raw water suction hole 52 opened in the side surface of the raw water container 3 and the raw water is injected through the injection pipe 54. By comprising in this way, another kind of liquid is not mixed, and an ultrafine bubble can be spaced apart by a liquid flow, without affecting the component of a liquid.

  The liquid pumped by the liquid ejecting device 51 passes through the surface portion 42c of the bubble generating medium 42 at a high speed at the moment when the ultrafine bubbles are generated from the holes 42b of the bubble generating medium 42, thereby generating the bubbles. The ultrafine bubbles are separated from the surface portion 42c of the medium 42. As a result, the ultrafine bubbles on the surface portion 42c move independently into the liquid without being combined with the ultrafine bubbles generated later and the ultrafine bubbles generated from the peripheral holes 42b. With this configuration, it is possible to generate ultrafine bubbles by a simple method. Moreover, the freedom degree of the installation method of the ultrafine bubble generator 6 can be improved, and the design according to an installation place and a function request | requirement can be enabled.

In addition, as shown in FIG. 5, the gas released from the bubble generating medium 42 can be active oxygen such as ozone.
A decompression compressor 61 for reducing the pressure in the space 2a in the distillation apparatus main body 2 is provided. In addition to the decompression compressor 61, a pumping compressor 62, which is a pumping means for air, is provided. An active oxygen generator 63 that generates active oxygen such as ozone from the air fed from the pressure compressor 62 is provided.
The active oxygen generator 63 is an apparatus that generates active oxygen such as ozone from oxygen in the air. Active oxygen such as ozone generated by the active oxygen generator 63 is pumped to the bubble generating medium 42.
Active oxygen, such as ozone, pumped to the bubble generating medium 42 by the pressure-feeding compressor 62 is heated by the heat source 45 when passing through the bubble generating medium 42 and is heated. Then, active oxygen such as hot ozone is ejected as ultrafine bubbles from the hole 42 b of the bubble generating medium 42 protruding into the raw water container 3 and mixed into the raw water. As a result, the raw material water is heated and evaporated by passing heat energy from the heated superfine bubbles.

  Moreover, bacteria and the like in the raw material water can be sterilized and washed with active oxygen such as ozone. Since the distillation apparatus 1 mixes ultrafine bubbles into the raw water, the raw water evaporates at a lower temperature than the conventional distillation apparatus. Therefore, there are cases where the bacteria and the like that have been sterilized by heat cannot be completely sterilized, but even in such a case, the bacteria or the like in the raw water can be sterilized by active oxygen such as ozone. This makes it possible to reduce the amount of heat necessary for distillation.

In addition, as shown in FIG. 6, the heat source 45 guides the sunlight collected by the condenser lens 71 to the periphery of the ultrafine bubble generating device 6. An optical fiber 72 may be included.
The condensing lens 71 is a convex lens and condenses natural light such as sunlight. The condensing lens 71 is fixed to the condensing lens base 73 so that the angle of the lens surface can be changed. When condensing sunlight, the angle of the lens surface of the condensing lens 71 is adjusted according to the movement of the sun. It is possible to change. By storing the position of the sun every hour in the control device, the control device calculates the angle of the lens surface facing the sun from the current time, and operates the actuator to move the lens surface of the condenser lens 71. By changing the angle, the condenser lens 71 can also track the movement of the sun. An incident end 72 a of the optical fiber 72 is disposed at the focal point of the condenser lens 71. The optical fiber 72 is made of, for example, quartz glass fiber, and the sunlight incident from the incident end is emitted from the emission end 72 b while repeating total reflection in the optical fiber 72. The exit end 72b is provided in the heat medium 74, and the heat medium 74 is heated by sunlight emitted from the exit end 72b.

Moreover, as shown in FIG. 7, raw material water can also be preheated using the calorie | heat amount of the refrigerant | coolant used for cooling of the vapor aggregator 5. As shown in FIG.
The raw water is temporarily stored in the water storage tank 81 before being introduced into the raw water container 3. The raw water is pumped up from the water storage tank 81 by the supply pump 82 and charged into the raw water container 3. A heater 83 for warming the raw water is provided inside the water storage tank 81. The heater 83 is hollow and warms raw material water by heat conduction by passing a heating medium.
The heating medium passed through the heater 83 transfers heat to the raw water, and then enters the heat exchanger 84 to exchange heat with the refrigerant used for cooling the vapor aggregator 5. Accordingly, the raw material water can be warmed by warming the heating medium and passing it again through the heater 83. Then, the heated raw water is pumped up from the water storage tank 81 by the supply pump 82 and charged into the raw water container 3.
Thus, by preheating raw material water, it becomes possible to evaporate raw material water efficiently, and energy required in order to raise the raw material water in the raw material water container 3 can be decreased.

  As described above, the distillation apparatus 1 includes a distillation apparatus main body 2 that can depressurize the space 2a, a raw water container 3 for storing raw water provided in the distillation apparatus main body 2, and the distillation A distilled water container 4 provided in the apparatus main body 2, and one or a plurality of steam aggregators 5 provided above the raw water container 3 and inclined downward toward the distilled water container 4 side. In the distillation apparatus 1, the distillation apparatus 1 includes an ultrafine bubble generation device 6 that protrudes from the lower side of the raw water container 3 to the inside, and the ultrafine bubble generation device 6 has ultrafine bubbles around the ultrafine bubble generation device 6. A heat source 45 for heating the gas to be formed is provided, and the ultrafine bubble generating device 6 includes a compressor 41 that is a compressor for pumping the gas, and raw water using the gas heated by the heat source 45 as ultrafine bubbles. Bubble generation medium for release 42, comprising a said bubble generating medium 42 is formed of a high-density complex, the high density composites are those a conductor. By comprising in this way, since the raw | natural raw material water boils at low temperature because the space part 2a in the distillation apparatus main body 2 is pressure-reduced, a heat consumption energy can be made small and the cost concerning distillation. Can be reduced. In addition, the maintenance cost can be reduced as compared with a method using a filter. Further, the heated ultrafine bubbles generated from the ultrafine bubble generator 6 act on the temperature rise of the raw material water, whereby the raw material water can be evaporated with a small amount of thermal energy. Further, since the heated ultrafine bubbles are contained in the raw material water, the evaporation speed of the raw material water is increased. In addition, since the ultrafine bubbles are cooled by transferring heat to the raw water while moving upward in the raw water, the volume continues to decrease, creating a space for generating new ultrafine bubbles, and more ultrafine bubbles. Bubbles can be generated. Further, the smaller the volume of the ultrafine bubbles, the longer the time existing in the liquid, and the number of the ultrafine bubbles present in the liquid can be increased. Further, when the ultrafine bubbles are released from the surface of the raw material water into the air, they burst, but at that time, the surface area becomes large, so that more raw material water can be evaporated.

  The steam aggregator 5 is formed of a high density composite. By configuring in this way, the high-density composite has fast heat conduction, so that a large amount of water vapor evaporated upward from the raw water container 3 can be condensed and led to the distilled water container 4.

  A liquid ejecting device 51 that ejects the same kind of liquid as the raw water is provided in a direction substantially orthogonal to the surface portion 42c of the bubble generating medium 42. By configuring in this way, it is possible to prevent the formation of large bubbles by separating them from the bubble generation medium 42 by the water flow at the moment when the ultrafine bubbles are generated. Can be generated. Further, since the ultrafine bubbles are diffused by the jet flow of the liquid jet device 51, the temperature of the raw material water can be quickly raised.

  The ultrafine bubble generating device 6 includes an active oxygen generating device that generates active oxygen from oxygen in the air, and the gas discharged from the ultrafine bubble generating device 6 to the raw water is active oxygen. is there. Since the space in the distillation apparatus main body 2 is depressurized, the raw water is boiled at a low temperature, so that the heat consumption energy can be reduced and the cost for distillation can be reduced. Moreover, bacteria and the like in the raw water can be sterilized by active oxygen such as ozone.

  The heat source 45 is configured by an electromagnetic induction device. By comprising in this way, the said bubble generation medium 42 can be heated rapidly and an ultrafine bubble can be generated efficiently.

  The heat source 45 can also include a condenser lens 71 that collects sunlight and an optical fiber 72 that guides the sunlight collected by the condenser lens 71 to the ultrafine bubble generator 6. . With this configuration, using sunlight, which is a natural energy, makes it possible to distill raw water without using fossil fuels at all. You wo n’t be charged.

DESCRIPTION OF SYMBOLS 1 Distillation apparatus 2 Distillation apparatus main body 3 Raw material water container 4 Distilled water container 5 Steam aggregator 6 Fine bubble generation apparatus 41 Compressor 42 Bubble generation medium 45 Heat source 51 Liquid injection apparatus 63 Active oxygen generation apparatus 71 Condensing lens 72 Optical fiber

Claims (5)

A distillation apparatus main body capable of depressurizing the internal space, a raw water container for storing raw water provided in the distillation apparatus main body, a distilled water container provided in the distillation apparatus main body, In a distillation apparatus comprising a steam aggregator provided above the raw water container,
The distillation apparatus includes an ultrafine bubble generating device that protrudes from below to the inside of the raw water container, and a heat source is provided around the ultrafine bubble generating device to heat a gas that becomes ultrafine bubbles. ,
The ultrafine bubble generating device comprises a compressor for pumping gas, and a bubble generating medium for releasing the gas heated by the heat source into the raw material water as ultrafine bubbles,
The bubble generating medium is formed of a porous body of a conductive carbon-based material, and fine pores having a diameter of several μm to several tens of μm are formed .   The distillation apparatus according to claim 1, further comprising a liquid ejecting apparatus that ejects the same kind of liquid as the raw material water in a direction substantially orthogonal to the surface portion of the bubble generating medium.   The ultrafine bubble generator comprises an active oxygen generator that generates active oxygen from oxygen in the air, and the gas released from the ultrafine bubble generator into the raw water is active oxygen. The distillation apparatus according to claim 1 or 2.   The distillation apparatus according to any one of claims 1 to 3, wherein the heat source is configured by an electromagnetic induction device.   The heat source includes a condensing lens that condenses sunlight and an optical fiber that guides the sunlight collected by the condensing lens to the ultrafine bubble generating device. The distillation apparatus according to claim 4.

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