JP6334434B2 - Fine bubble generating apparatus and fine bubble generating method - Google Patents

Description

  The present invention relates to a fine bubble generating device for producing fine bubble water containing fine bubbles, for example.

  2. Description of the Related Art Conventionally, as a fine bubble generating device, a technique in which bubbles are included in a liquid by rotating a liquid mixed with a gas at high speed is widely known (see, for example, Patent Document 1).

Japanese Patent No. 4556396

  In the fine bubble generating apparatus having such a configuration, there is a demand for increasing the fine bubbles to be contained in the liquid.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a fine bubble generating apparatus and a fine bubble generating method capable of increasing the fine bubbles to be contained in a liquid.

In order to solve such a problem, the fine bubble generating device of the present invention generates a fine bubble liquid by a high-speed swirling method that generates nano-order fine bubbles in a medium liquid by a swirling flow that travels in a traveling direction substantially perpendicular to the swirling direction. A microbubble generator having a cylindrical member to be generated, and a storage tank for storing the microbubble liquid supplied from the cylindrical member and discharging the microbubble liquid from an upper discharge pipe ;
A supply pipe for supplying the medium liquid to the fine bubble generating unit;
When the cross sectional area of the radial cross section perpendicular to the longitudinal direction of the supply pipe connected to the discharge pipe is 1.0, the radial cross sectional area of the tubular member is is 0.1 to 0.6, the passed through a fine bubble solution to increase the hydraulic pressure in the micro bubble generating portion, when discharging the fine bubbles liquid from the discharge port, opening the elevated fluid pressure And an auxiliary part to
The auxiliary part is
The length is 1 to 7 m, and the increased hydraulic pressure is 0.46 MPa or more and 0.61 MPa or less.

  Thereby, the fine bubble production | generation apparatus can increase the fine bubble contained in a medium liquid.

Further, the fine bubble generating method of the present invention uses a high-speed swirling method in which a swirling flow is advanced in a traveling direction substantially perpendicular to the swirling direction to generate nano-order fine bubbles in the medium liquid . by storing after swirled and the medium liquid and gaseous state where 61MPa plus the following liquid pressure, after generating microbubbles liquid containing micro-bubbles by mixing the said liquid medium gases, Discharging the fine bubble liquid from the discharge pipe at the top of the storage tank;
Connected to the discharge pipe, the diameter in the radial direction is 6.0 to 9.0 mm, and the hydraulic pressure of 0.46 MPa or more and 0.61 MPa or less is released after passing through a tubular member of 1 to 7 m. It is characterized by.

  Thereby, the fine bubble production | generation method can increase the fine bubble contained in a medium liquid.

  Thereby, the fine bubble production | generation method can increase the fine bubble contained in a medium liquid.

INDUSTRIAL APPLICATION This invention can implement | achieve the fine bubble production | generation apparatus and fine bubble production | generation method which can increase the fine bubble contained in a medium liquid.

It is a basic diagram which shows the structure of a nano bubble production | generation apparatus. It is a graph which shows the relationship between a diameter and length, and DO value. It is a graph which shows the relationship between a water pressure and the amount of water. It is a graph which shows the relationship between a water pressure and DO value. It is a basic diagram which shows the structure (1) of the nano bubble production | generation apparatus in other embodiment. It is a basic diagram which shows the structure (1) of the nano bubble production | generation apparatus in other embodiment.

  Next, modes for carrying out the present invention will be described with reference to the drawings.

<Embodiment>
In FIG. 1, reference numeral 1 denotes a nanobubble generator as a whole. The nanobubble generating device 1 stores the medium liquid supplied from the medium liquid supply unit 3 in the liquid storage tank 2 and supplies the medium liquid to the nanobubble generator 5 by the pump 4.

  In the specification of the present application, nanobubble means a bubble of about nano-order (10 nm to 900 nm). The smaller the bubble particle size, the greater the surface area of the bubble and the greater the amount of dissolved gas.

  The nanobubble generator 5 causes the medium liquid to contain nanobubbles (fine bubbles) made of gas by high-speed rotation, and then passes through the auxiliary unit 7 and supplies it to the liquid storage tank 2. As a result, the microbubble liquid containing nanobubbles is stored in the liquid storage tank 2 and supplied again to the nanobubble generator 5 as a medium liquid. The fine bubble liquid stored in the liquid storage tank 2 is discharged through the bubble liquid discharge portion 8.

  The amount of nanobubbles contained in the fine bubble liquid depends on the operation time of the nanobubble generator 1, the supply speed of the medium liquid supplied from the medium liquid supply unit 3, and the discharge of the fine bubble liquid discharged from the bubble liquid discharge unit 8. It can be adjusted in relation to the speed. The nanobubble generating device 1 may generate the fine bubble liquid in a batch manner without supplying the medium liquid and discharging the fine bubble liquid, or may discharge the fine bubble liquid while supplying the medium liquid. . At this time, more nanobubbles can be contained in the fine bubble liquid by making the discharge speed of the fine bubble liquid smaller than the supply speed of the medium liquid.

  The medium liquid is not particularly limited and is appropriately selected depending on the application. For example, various liquids such as water, an aqueous solution, and an organic solvent can be used, but water or an aqueous solution is preferable. Various kinds of water such as tap water, electrolyzed water, pure water, and purified water can be used. Moreover, you may use the water which removed unnecessary components, such as an impurity, by installing various filters in the front | former stage.

  The gas to be contained as nanobubbles is not particularly limited and is appropriately selected depending on the application. For example, air, hydrogen, oxygen, carbon dioxide and the like are preferable. These gases are mixed with the medium liquid via, for example, a port provided at the front stage or the rear stage of the pump 4 or a port included in the pump 4.

  The nanobubble generator 5 is supplied with the medium liquid or the fine bubble liquid from the liquid storage tank 2 through the supply pipe 11. In FIG. 1, for the sake of convenience, the traveling direction of the medium liquid is indicated by a broken line, and the turning direction is indicated by a solid line.

  The supply pipe 11 supplies the medium liquid to the cylindrical outer cylinder portion 12. The outer cylinder part 12 has the cylindrical inner cylinder part 13 in the inside, and sectional drawing cut | disconnected in the horizontal direction has a donut shape.

  The outer cylinder part 12 advances the medium liquid vertically downward while turning the medium liquid counterclockwise. The medium liquid collides with the end surface 12 b of the outer cylinder portion 12, and the traveling direction changes 180 ° vertically upward, and proceeds to the inner cylinder portion 13.

  The inner cylinder part 13 has the linear part 13a and the curve part 13b. The straight line portion 13a has an opening at the lower end, and advances the liquid medium entering from the opening portion in a vertically upward direction while turning the liquid medium counterclockwise.

  The curve portion 13 b causes the medium liquid to collide with the wall surface outside the curve, thereby changing the traveling direction of the medium liquid traveling vertically upward by 90 ° in the horizontal direction, and transferring the medium liquid to the third cylindrical portion 14. Make it progress.

  The third cylindrical portion 14 has a cylindrical shape. The medium liquid is supplied from the vicinity of the upper end of the third cylindrical portion 14 and has an opening 15 at the center of the lower end. Therefore, the third cylindrical part 14 advances the medium liquid supplied from the vertically upward direction in the vertically downward direction while turning along the wall surface, discharges it from the opening 15, and supplies the medium liquid to the storage tank 16. .

  That is, the nanobubble generator 5 creates a gas-liquid interface due to a specific gravity difference in a state where the gas and the medium liquid are swirled to generate a velocity, and generates nanobubbles by gas-liquid friction generated at the interface. Further, the nanobubble generator 5 collides the medium liquid with the wall surface and changes the traveling direction thereof, thereby disturbing the flow of the medium liquid and vigorously stirring and mixing the gas and the medium liquid. As a result, the bubbles become fine due to the physical collision action between the gas and the medium liquid, and more nanobubbles are formed.

  The nanobubble generator 5 rapidly changes the traveling direction of the medium liquid while rotating the medium liquid at high speed. Thereby, the nanobubble generator 5 can apply a larger acceleration to the medium liquid, and can disperse the bubbles and make them fine by a physical collision action between the gas and the medium liquid.

  The nanobubble generator 5 changes the turning direction of the medium liquid at a steep angle of 80 ° or more by causing the medium liquid that rotates at high speed to collide with the end surface 12b or the curved portion 13b that is the wall surface.

  That is, the nanobubble generator 5 is provided in the vicinity of one end in the vertically upward direction, the supply pipe 11 serving as a liquid supply unit that supplies the medium liquid and the gas, and the vertically downward direction that is the other direction from the vertically upward direction. An outer cylindrical portion 12 that generates a swirling flow toward the inner side, a cylindrical inner cylindrical portion 13 that is provided inside the outer cylindrical portion 12 and that is open in a state where an end portion in a vertically downward direction is opened, and an inner cylindrical portion 13 A curved portion 13b extending from the inner cylindrical portion 13 for changing the turning direction of the medium liquid, a third cylindrical portion 14 for turning the medium liquid supplied from the curved portion 13b, and a third cylinder. And a storage tank 16 for storing the medium liquid supplied from the unit 14.

  Thereby, since the nanobubble generator 5 can change the advancing direction of the swirl flow over 3 degrees, the bubbles are effectively crushed and more nanobubbles are generated in the medium liquid, and the fine bubble liquid is generated. It can be generated and stored in the storage tank 16.

  The storage tank 16 supplies the medium liquid to the discharge pipe 19 connected vertically upward. The discharge pipe 19 supplies the fine bubble liquid to the auxiliary unit 7.

  The auxiliary portion 7 is a tubular member having a smaller diameter than the supply pipe 11. The auxiliary section 7 is formed to have a smaller cross-sectional area than the supply pipe 11 that supplies the medium liquid to the nanobubble generator 5, and the pressure is larger than that of the supply pipe 11 inside the auxiliary section 7. The auxiliary unit 7 can apply a large pressure to the fine bubble liquid inside, increase the nanobubbles in the fine bubble liquid by the effect of the high pressure, and discharge the supplied fine bubble liquid to the liquid storage tank 2.

  According to Henry's Law, the solubility of a gas improves when the pressure applied to the liquid is large. Therefore, it is known that when a pressure is applied to a liquid in the presence of gas and the pressure is rapidly decreased, the dissolved gas becomes fine bubbles in the liquid.

  That is, in the nanobubble generator 5, gas is diffused into the medium liquid by high-speed rotation, and a fine bubble liquid is generated. This fine bubble liquid contains not only nano-order but also micro-order and milli-order bubbles. The auxiliary portion 7 releases the high-pressure fine bubble liquid to the atmospheric pressure at once by discharging the fine bubble liquid in a state where the gas solubility is improved by the high pressure to the liquid storage tank 2. As a result, it is thought that nanobubbles contained in the fine bubble liquid may increase. Moreover, the effect that the bubbles are crushed and reduced by the high pressure inside the auxiliary portion 7 can be considered.

  The shape of the auxiliary portion 7 is not particularly limited, and various shapes such as a circular tube and a square tube can be used. The material is not limited, and various materials such as plastic, glass, and metal can be used. The cross-sectional area of the auxiliary portion 7 is formed smaller than the cross-sectional area of the supply pipe 11. Preferably, when the cross-sectional area of the supply pipe 11 is 1, the cross-sectional area of the auxiliary portion 7 is preferably 0.1 to 0.6 (0.1 or more, 0.6 or less, hereinafter the same meaning is used) More preferably 0.15 to 0.5, and still more preferably 0.2 to 0.45. If the cross-sectional area is too small, the flow rate of the medium liquid and the fine bubble liquid in the entire nanobubble generator 1 is reduced, and the effect of generating fine bubbles due to high-speed rotation is reduced. On the other hand, if the cross-sectional area is large, the number of fine bubbles increases due to high pressure. This is because the effect cannot be obtained.

  Although the length of the auxiliary | assistant part 7 does not have a restriction | limiting in particular, Preferably it is 0.5-10m, More preferably, it is 1-8m, More preferably, it exists in the range of 2-7m. If it is too short, the time required for high pressure is also shortened, so that the effect of increasing the fine bubbles cannot be sufficiently obtained. If it is too long, the flow rates of the medium liquid and the fine bubble liquid in the entire nanobubble generator 1 are reduced. It is. The cross-sectional area and length of the auxiliary portion 7 are appropriately selected according to the performance of the pump 4 and the nanobubble generator 5.

  The nanobubble generating device 1 circulates the microbubble liquid stored in the liquid storage tank 2 over a plurality of times to generate a microbubble liquid containing a sufficient amount of nanobubbles. The fine bubble liquid is discharged through the bubble liquid discharge unit 8. The nanobubble generating device 1 has a storage tank (not shown) in the subsequent stage of the bubble liquid discharge unit 8 and supplies the fine bubble liquid from the storage tank according to the user's request. You may make it produce | generate a fine bubble liquid according to a capacity | capacitance.

  Next, the result of the experiment performed on the nanobubble generator 1 will be described.

  A blade hose made of soft vinyl chloride was connected as the auxiliary part 7 to the nanobubble generator 5 (MN-20, manufactured by Tech Corporation) and operated for 10 minutes. In this example, the experiment was performed by changing the diameter and length of the auxiliary portion 7. As a medium liquid, 20 liters of water obtained by filtering foreign matter with a filter was used, and oxygen gas was used as a gas. The diameter (inner diameter) of the supply pipe 11 was 15 mm. Oxygen gas was taken in from a port provided at the rear stage of the pump 4.

  As the pump 4, a SUS general-purpose vortex turbine pump 20NPD07Z (manufactured by Nikuni Co., Ltd.) is used, and the fine bubble liquid is extracted from the storage tank 2 when the operation time is 0 minutes, 5 minutes, and 10 minutes, and the dissolved oxygen amount Was measured. The dissolved oxygen amount was measured using a portable dissolved oxygen-based DO-31P (high concentration type, manufactured by Toa DKK Corporation). Table 1 and FIG. 2 show the amount of dissolved oxygen when the diameter (inner diameter) and length of the auxiliary portion 7 are changed. FIG. 2 shows the relationship between the length of the auxiliary portion 7 and when the nanobubble generator 1 is operated for 10 minutes, and the diameter of the auxiliary portion 7 is indicated by the shape of the plot mark.

  As can be seen from Table 1 and FIG. 2, when the operating time is 10 minutes, the DO (Dissolved Oxygen) value that was 38.2 mg / l when the diameter was 12 mm was irrespective of the length of the auxiliary unit 7. By using the auxiliary part 7 having a diameter of 9 mm or less, it was abnormally increased by 43.0 mg / l. In particular, when the auxiliary part 7 having a diameter of 8 mm and 9 mm was used, the DO value was as high as 49 mg / l or higher.

  Since the diameter of the supply pipe 11 is 15 mm, when the cross-sectional area when the supply pipe 11 is cut in the radial direction is “1”, the cross-sectional areas of the auxiliary portions 7 having diameters of 12 mm, 9 mm, 8 mm, and 6 mm are respectively “0.64”, “0.36”, “0.28”, and “0.16”. Therefore, when the cross-sectional area of the supply pipe 11 is “1”, the cross-sectional area of the auxiliary portion 7 is 0.1 to 0.6, more preferably 0.15 to 0.5, and still more preferably 0.2 to 0. It was found that the DO value can be improved by setting to .45.

  In addition, regarding the fine bubble liquid with an operation time of 10 minutes when the diameter and length of the auxiliary part 7 are changed, the number of particles is measured using a particle measuring device (Nano Particle Analysis System Nono Sight, manufactured by Nippon Quantum Design Co., Ltd.). Went. In Table 2, the raw water is tap water that has been passed through a filter for removing foreign substances, and serves as a medium liquid supplied to the nanobubble generator 1.

  As can be seen from Table 2, as the DO value increases, the number of particles also increases, and the DO value increases due to the increase in the number of particles, not the size of the particles, and the nanobubbles increase reliably. confirmed.

Tables 3 and 4 show the relationship between the water pressure and the amount of water when the diameter and length of the auxiliary portion 7 are changed in the nanobubble generator 1. The operating conditions of the pump are as follows.
Pump A: 60Hz
Pump B: 55Hz
The pump B is the same as that used in the experiment of Table 1, and also shows the DO value when operated for 10 minutes.

  FIG. 3 shows the relationship between the water pressure and the amount of water. In both pump A and pump B, it can be seen that the amount of water decreases as the water pressure increases regardless of the diameter or length of the auxiliary portion 7. In the graph, “8A” means that the diameter is 8 mm and the pump A is used.

  As shown in FIG. 4, when the diameter of the auxiliary portion 7 is 12 mm, the water pressure is 0.43 MPa and the DO value is 38.2 mg / l. However, when the diameter is 6 mm and 8 mm, both are DO values. Was 40 mg / l or more and the water pressure was as high as 0.5 MPa or more. This shows that the DO value can be increased by setting the water pressure high. In addition, as shown in FIG. 3, although the amount of water fell with a raise of a water pressure, it was confirmed that a water pressure influences more than a water amount and raises DO value.

According to the above configuration, the fine bubble generating device (nanobubble generating device 1) of the present invention is
A fine bubble generating part (nanobubble generator 5) for generating fine bubbles by containing a gas in the medium liquid by a physical collision action;
A supply pipe (supply pipe 11) for supplying the medium liquid to the fine bubble generating section;
It has an auxiliary part (auxiliary part 7) for increasing the hydraulic pressure in the fine bubble generating part and releasing the increased hydraulic pressure.

  As a result, the micro-bubble generating device increases the hydraulic pressure in a state where the micro-bubbles are contained by the physical collision action and the contact area between the gas and the medium liquid is increased, and more gas is dissolved in the medium liquid. By forming a fine bubble liquid and releasing this pressure, fine bubbles can be further generated, and the nanobubble content in the fine bubble liquid can be increased.

  The fine bubble generating unit can effectively generate a fine bubble liquid containing many nanobubbles by generating fine bubbles in the medium liquid using high-speed rotation.

  In the fine bubble generating part, the increased hydraulic pressure is 0.46 MPa or more. Thereby, the nanobubble content in the fine bubble liquid can be increased by the effect of high hydraulic pressure.

  The auxiliary part is formed of a tubular member that allows the fine bubble liquid generated by the fine bubble generation part to pass through. When the cross-sectional area of the cross section perpendicular to the length direction of the supply pipe is 1.0, the fine bubble liquid The area of the discharge port for discharging is 0.1 to 0.6.

  Thereby, the fine bubble generating apparatus can increase the hydraulic pressure with respect to the fine bubble generating unit with a simple configuration, and can release the hydraulic pressure at once from the discharge port.

  The auxiliary part has a length of 0.5 to 10 m. Thereby, the fine bubble production | generation apparatus can earn time for fine bubble water to stay in a fine bubble production | generation apparatus using the length of an auxiliary | assistant part, can raise the amount of dissolved oxygen, and can increase a nano bubble.

  The auxiliary unit increases the hydraulic pressure applied to the medium liquid by 10% or more when the medium liquid is supplied to the supply pipe. Thereby, the fine bubble generating apparatus can reliably obtain the effect of increasing the nanobubbles regardless of the performance of the pump 4.

  A cooling unit for cooling the fine bubble liquid is provided. Thereby, the fine bubble production | generation apparatus can raise the amount of dissolved oxygen in fine bubble water, and can increase a nano bubble.

  It has a storage tank (liquid storage tank 2) for storing the medium liquid, and the auxiliary part circulates the fine bubble liquid to the fine bubble generating part and the auxiliary part by supplying the fine bubble liquid to the storage tank. Let Thereby, since the fine bubble generating apparatus circulates the fine bubble liquid as the medium liquid to the fine bubble generation unit and the auxiliary part over a plurality of times, the nanobubbles in the fine bubble liquid can be increased.

  The auxiliary unit supplies the fine bubble liquid to the open tank (liquid storage tank 2) provided in the subsequent stage. Thereby, the auxiliary | assistant part can open | release the liquid pressure of fine bubble liquid with a simple structure.

  The auxiliary portion is a tubular member having a cross-sectional area of 0.1 to 0.6 when the cross-sectional area of the cross section perpendicular to the length direction of the supply pipe is 1.0. Thereby, the fine bubble generating apparatus can increase the hydraulic pressure with respect to the fine bubble generating unit with a simple configuration, and can release the hydraulic pressure at once from the discharge port.

Further, the fine bubble generating device, by a physical collision action, mixes the medium liquid and the gas to generate a fine bubble liquid containing fine bubbles,
A supply pipe for supplying the medium liquid to the fine bubble generating unit,
When the cross-sectional area of the cross section perpendicular to the length direction of the supply pipe is 1.0, the area of the discharge port for discharging the fine bubble liquid is 0.1 to 0.6.

  Thereby, the microbubble production | generation apparatus can increase nanobubble content in a microbubble liquid.

Furthermore, the fine bubble generating device mixes the medium liquid and the gas by a physical collision action to generate a fine bubble liquid containing fine bubbles,
A supply pipe for supplying a medium liquid to the fine bubble generating unit;
The microbubble liquid is allowed to pass through, and the cross-sectional area is smaller than that of the supply pipe, and the auxiliary part is formed of a tubular member having a thickness of 1.0 to 10 m.

  As a result, the fine bubble generating device can increase the amount of dissolved gas by bringing the gas and the medium liquid into contact with each other for a long time during which the fine bubbles pass through the auxiliary part, and as a result, the nanobubbles in the fine bubble liquid can be increased. it can. Further, since a tubular member having a small cross-sectional area is used, the residence time of the fine bubble liquid can be shortened, and gas separation can be hardly caused. A plurality of supply pipes and tubular members may be used in parallel.

In addition, the fine bubble generation method generates a fine bubble liquid containing fine bubbles by mixing the medium liquid and the gas by a physical collision action.
The fine bubbles are contained in a state where the liquid pressure of the fine bubble liquid is higher than the liquid pressure applied when the medium liquid is supplied, and the liquid pressure is released.

  Thereby, more fine bubbles can be generated at a hydraulic pressure higher than the pump capacity.

  Furthermore, in the fine bubble generation method, after adding a liquid pressure of 0.46 MPa or more and causing a physical collision action, the medium liquid and the gas are mixed to contain fine bubbles, Release fluid pressure.

  Thereby, gas can be dissolved effectively in the medium liquid, and many fine bubbles can be generated.

<Other embodiments>
In the above-described embodiment, the case where the auxiliary unit 7 is arranged linearly has been described. The present invention is not limited to this. For example, as shown in FIG. 2, the auxiliary portion 27 may be arranged in a coiled state, may be meandered, or may be arranged zigzag. Depending on the characteristics such as the space in which the auxiliary part can be arranged and the material of the auxiliary part, the auxiliary part can be arranged freely. Further, as the auxiliary portion 7, a plurality of tubular members can be used. The same applies to the supply pipe 11.

  Moreover, in the above-mentioned embodiment, the case where the nanobubble generator 5 which changes the angle abruptly three times was used as the nanobubble generator by high-speed turning was described. The present invention is not limited to this. For example, as shown in FIG. 2, a nanobubble generator 25 that does not have the third cylindrical portion 14 may be used. In short, it has a configuration capable of generating nanobubbles using high-speed rotation. Just do it. Further, it is not always necessary to rotate at high speed. For example, fine bubbles may be generated by causing a physical collision effect by meandering the medium liquid a plurality of times.

  Furthermore, in the above-described embodiment, the medium liquid and the fine bubble liquid are stored in the liquid storage tank 2, and the nanobubble generator 5 and the auxiliary unit 7 are circulated for a certain time, so-called batch type method. The case of generating is described. The present invention is not limited to this, for example, as shown in FIG. 2, the medium liquid is supplied to the nanobubble generator 25 and the auxiliary unit 27, and is discharged from the bubble liquid discharge unit 8 as it is, so-called continuous type fine bubble liquid. It may be generated. Of course, it is also possible to connect two or more sets of the nanobubble generator 25 and the auxiliary unit 27. In this case, in order to release pressure from the auxiliary portion 27 at a stretch, it is preferable to provide an open tank 28. The open tank 28 may be sealed, for example, the upper part may be opened. The fine bubble liquid supplied from the auxiliary unit 27 may be released into the fine bubble liquid stored in the open tank 28 or may be solved by an air layer formed on the upper part of the fine bubble liquid.

  Moreover, in the above-mentioned embodiment, the case where generation of nanobubbles was performed at room temperature and adjustment for water temperature was not performed was described. The solubility of gas increases as the liquid temperature decreases. For this reason, a cooling function can be added so that the liquid temperature in the auxiliary | assistant part 7 may be reduced. For example, a cooling device can be provided around the auxiliary unit 7, or a cooling device can be provided in the liquid storage tank 2. In this case, the part to be cooled is preferably formed of a material having high thermal conductivity such as metal or glass. Thereby, more gas can be dissolved in a medium liquid and the effect of the auxiliary | assistant part 7 can be improved further.

  Moreover, in the above-mentioned embodiment, the case where the auxiliary | assistant part 7 was provided as an auxiliary | assistant part was described. The present invention is not limited to this. For example, as shown in FIG. 6, the area of the discharge port at the tip of the discharge pipe 19 connected to the nanobubble generator 5 may be limited. Can be obtained. In this case, the discharge pipe 19 serves as an auxiliary part. As a limitation of the area, a plurality of holes can be provided, such as a single or shower. Further, a movable valve may be formed at the discharge port, and the area of the discharge port may be set freely. Thereby, the content of nanobubbles can be adjusted according to the situation.

  Furthermore, in the above-described embodiment, the case where the nanobubble generator 1 is used alone has been described. The present invention is not limited to this. For example, the nanobubble generator 1 may be used in combination with the electrolyzed water generator, and nanobubble electrolyzed water may be generated using the generated electrolyzed water as a medium liquid.

  Furthermore, in the above-described embodiment, the nanobubble generator 1 as the microbubble generator is constituted by the nanobubble generator 5 as the microbubble generator, the supply pipe 11 as the supply pipe, and the auxiliary section 7 as the auxiliary section. The case where it is configured is described. The present invention is not limited to this, and the microbubble generating device of the present invention may be configured by a microbubble generating unit, a supply pipe, and an auxiliary unit having various configurations.

  The present invention can be used, for example, in a nanobubble generating device that generates nanobubble water containing nanobubbles.

DESCRIPTION OF SYMBOLS 1: Nano bubble production | generation apparatus 2: Liquid storage tank 3: Medium liquid supply part 4: Pump 5,25: Nano bubble generator 7,27: Auxiliary part 8: Bubble liquid discharge part 11: Supply pipe 12: Outer cylinder part 12b: End surface 13: Inner cylinder part 13a: Straight line part 13b: Curve part 14: Third cylindrical part 15: Opening part 16: Storage tank 19: Discharge pipe 28: Open tank

Claims (13)

A cylindrical member that generates a fine bubble liquid by a high-speed swirling method that generates nano- sized fine bubbles in a medium liquid by a swirling flow that travels in a direction substantially perpendicular to the swirling direction, and a fine bubble liquid that is supplied from the cylindrical member And a fine bubble generating part having a storage tank for discharging the fine bubble liquid from an upper discharge pipe ,
A supply pipe for supplying the medium liquid to the fine bubble generating unit;
When the cross sectional area of the radial cross section perpendicular to the longitudinal direction of the supply pipe connected to the discharge pipe is 1.0, the radial cross sectional area of the tubular member is is 0.1 to 0.6, the passed through a fine bubble solution to increase the hydraulic pressure in the micro bubble generating portion, when discharging the fine bubbles liquid from the discharge port, opening the elevated fluid pressure And an auxiliary part to
The auxiliary part is
A microbubble generator characterized by having a length of 1 to 7 m and an increased hydraulic pressure of 0.46 MPa or more and 0.61 MPa or less. The increased hydraulic pressure is
It is 0.50 MPa or more. The fine bubble generating apparatus according to claim 1, wherein The auxiliary part is
It consists of resin hoses. The microbubble production | generation apparatus in any one of Claims 1-2 characterized by the above-mentioned. The auxiliary part is
The fine bubble generating device according to claim 1, wherein when the fine bubble liquid is discharged from the discharge port, the increased liquid pressure is released to atmospheric pressure all at once. The auxiliary section has a radial cross-sectional area of the tubular member of 0.4 to 0.6 when a cross-sectional area of a radial cross-section of the supply pipe is 1.0. The fine bubble generating apparatus according to 1 or 2. The cooling device for cooling the fine bubble liquid is provided. The fine bubble generation device according to any one of claims 1 to 5. A storage tank for storing the medium liquid;
The auxiliary part is
By supplying the fine bubble liquid to the storage tank,
The microbubble generator according to any one of claims 1 to 6, wherein the microbubble liquid is circulated through the microbubble generator and the auxiliary unit. The storage tank is
It is an open tank. The microbubble production | generation apparatus of Claim 7 characterized by the above-mentioned. The auxiliary part is
The microbubble generator according to any one of claims 1 to 8, wherein the microbubble generator is a tubular member whose diameter does not change. The auxiliary part is
The diameter is 6.0 to 9.0 mm. The fine bubble generating device according to any one of claims 1 to 9, wherein The cylindrical member is
It is provided in the inside of the said storage tank. The microbubble production | generation apparatus in any one of Claims 1-10 characterized by the above-mentioned. The cylindrical member is
It has a plurality of cylindrical parts and changes the direction of travel of the swirl flow at a steep angle between the plurality of cylindrical parts
The fine bubble generating apparatus according to any one of claims 1 to 11. In a state where a liquid pressure of 0.46 MPa or more and 0.61 MPa or less is applied by a high-speed swirling method in which a swirling flow is advanced in a traveling direction substantially perpendicular to the swirling direction to generate nano-order fine bubbles in the medium liquid. by storing after swirling the liquid medium and the gas, after generating microbubbles liquid containing micro-bubbles by mixing the said liquid medium gas discharged at the top of the storage tank the fine air bubble liquid Drain from the tube,
It is connected to the discharge pipe, the diameter in the radial direction is 6.0 to 9.0 mm, and the hydraulic pressure of 0.46 MPa or more and 0.61 MPa or less is released after passing through a tubular member of 1 to 7 m. A method for generating fine bubbles.

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