JP6968405B2 - Gas-liquid mixing nozzle - Google Patents

Description

The present invention relates to a gas-liquid mixing nozzle having a function of generating a liquid containing a large amount of bubbles (nano bubbles) having a particle size of nanometer level.

As for an instrument or device having a function of generating microbubbles or nanobubbles in water or other liquids, those having various shapes and structures have been conventionally proposed, but are related to the present invention. For example, there are the "micro bubble generator" described in Patent Document 1 and the "device for producing a high-concentration gas solution" described in Patent Document 2.

The "fine bubble generator" described in Patent Document 1 includes a first cylindrical closed container, a second cylindrical open container having a swirling space for a gas-liquid mixed fluid, and a second cylindrical open container. An introduction port for introducing a gas-liquid mixed fluid along the tangential direction of the inner surface of one cylindrical closed container, a gas-liquid introduction port provided with an ejector introduction port, and an ejector introduction port for the first cylindrical closed container. It was located on the bottom wall orthogonal to the arranged surface, the ceiling wall facing the wall surface and located near the inlet, and the central axis of the second cylindrical open container, and penetrated the ceiling wall. It is composed of a second cylindrical open container provided with a gas / liquid discharge port, and has a function of applying a swirling force to the gas / liquid mixed fluid and making bubbles finer by a shearing force.

In the "device for producing a high-concentration gas solution" described in Patent Document 2, one end side of a container body having a cylindrical inner space is closed by a wall body, and the other end side is the cylindrical inner space in the central portion thereof. A container body covered with a wall having an opening with a diameter smaller than the inner diameter of the container body, a gas introduction hole to be dissolved provided in the wall body on one end side, and a part of the inner wall surface of the cylindrical portion of the container body. A wall body having an opening at one end and an opening at the other end of the opening at the center of the wall on the other end side of the swirl type gas melting device including a pressurized liquid introduction port opened in the tangential direction of the circumference. It is configured by connecting one end of another container for storing the liquid, and has a function of deriving a high-concentration gas solution from the opening of the other end of the other container.

Japanese Unexamined Patent Publication No. 2015-20165 Japanese Unexamined Patent Publication No. 2013-52319

The "fine bubble generator" described in Patent Document 1 has an advantage that bubbles having a particle size on the order of micrometers can be efficiently generated, but bubbles having a large particle size exceeding the micrometer level can be generated. May be mixed.

On the other hand, the "device for producing a high-concentration gas solution" described in Patent Document 2 has an advantage that a gas can be dissolved in a liquid with high efficiency, but it exceeds the micrometer level as described above. Bubbles with a large particle size may be mixed. Further, in this "device for producing a high-concentration gas solution", 0.3 MPa of pressurized water was introduced into the pressurized liquid introduction port as described in [Mode for carrying out the invention] of Patent Document 2. In this case, the high-concentration gas-dissolving liquid flow discharged from the high-concentration gas-dissolving liquid particle outlet may have too strong water force, and it may be difficult to use it as a shower or the like in the air.

In the technical field to which the present invention belongs, it is an important solution that is always required to improve the dissolution efficiency of a gas in a liquid and to suppress the mixing of bubbles having a large particle size exceeding the nanometer or micrometer level. It is an issue.

Therefore, an object to be solved by the present invention is to provide a gas-liquid mixing nozzle having high gas dissolution efficiency in a liquid and extremely little mixing of bubbles having a large particle size exceeding the nanometer or micrometer level. ..

The gas-liquid mixing nozzle of the present invention has a first swirling chamber that generates a liquid swirling flow by a liquid introduced from the outside via a liquid introduction path, and a liquid swirling flow in the first swirling chamber that is introduced from the outside. A second swirling chamber that mixes with a gas to generate a gas-liquid swirling flow mixed with fine bubbles, a gas-liquid mixing chamber that flows in the gas-liquid swirling flow in the second swirling chamber to turbulent flow, and the gas-liquid mixing chamber. It is characterized by being provided with a discharge hole having a predetermined diameter for discharging the gas-liquid mixed fluid mixed with fine bubbles in the room to the outside.

Further, in the gas-liquid mixing nozzle,
The first swivel chamber has a first cylindrical body having partition walls at both ends, and a tubular liquid introduction path that penetrates one of the partition walls and is inserted toward the first tubular body. A liquid outflow hole is provided in the peripheral wall of the liquid introduction path along a direction forming a twisting position with the axis of the liquid introduction path.
The second swivel chamber has a partition wall at both ends, and at least one end side is located in the first tubular body and the second tubular body accommodated and held in the first tubular body. A liquid introduction hole formed in the peripheral wall of the second cylinder along a direction forming a twisting position with its axis, a gas introduction path for allowing gas to flow into the second cylinder, and the second cylinder. With a through hole opened in the partition wall at the other end of the shape,
The gas-liquid mixing chamber shall be provided with a mixing container that communicates with the second tubular body via the through hole, and a plurality of the discharging holes opened in the partition wall of the mixing container. Can be done.

Further, in the gas-liquid mixing nozzle,
The plurality of the discharge holes can be arranged in a state of being arranged along a plurality of radiation curves virtualized on the partition wall surface facing the through hole of the mixing container.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a gas-liquid mixing nozzle having high gas dissolution efficiency in a liquid and extremely little mixing of bubbles having a large particle size exceeding the nanometer or micrometer level.

It is a perspective view which shows the gas-liquid mixing nozzle which is an embodiment of this invention. It is sectional drawing in the SS line in FIG. It is sectional drawing in the TT line in FIG. It is sectional drawing in the U-U line in FIG. It is a bottom view of the gas-liquid mixing nozzle seen from the arrow V direction in FIG. It is a figure which shows the use example of the gas-liquid mixing nozzle shown in FIG.

Hereinafter, the gas-liquid mixing nozzle 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 6. As shown in FIGS. 1 to 4, the gas-liquid mixing nozzle 100 of the present embodiment includes a first swirl chamber 10 that generates a liquid swirl flow F1 by a liquid R introduced from the outside via the liquid introduction path 1. The second swirling chamber 20 that causes the liquid swirling flow F1 in the first swirling chamber 10 to flow in and mixes with the gas G introduced from the outside via the gas introduction path 50 to generate a gas-liquid swirling flow F2 mixed with fine bubbles AB. And, the gas-liquid mixing chamber 30 in which the gas-liquid swirling flow F2 in the second swirling chamber 20 is made to flow in and turbulent, and the gas-liquid mixing fluid F3 mixed with fine bubbles AB in the gas-liquid mixing chamber 30 are discharged to the outside. It is provided with a plurality of discharge holes 40 having a predetermined diameter.

As shown in FIGS. 2 and 3, the first swivel chamber 10 has a cylindrical first cylindrical body 11 having partition walls 11a and 11b at both ends, and a first cylinder penetrating one partition wall 11a. A plurality of liquids opened on the peripheral wall of the liquid introduction path 1 along the direction forming a twisting position with the cylindrical liquid introduction path 1 inserted into the body 11 and the axial center 1c of the liquid introduction path 1. It is provided with an outflow hole 2. The tip of the liquid introduction path 1 located in the first tubular body 11 is closed by the lid body 3. The circular tubular gas introduction path 50 penetrates the tubular peripheral wall of the liquid introduction path 1, is piped so as to be coaxial with the axis 1c, penetrates the lid 3, and communicates with the inside of the second swivel chamber 20. There is. In the present embodiment, six liquid outflow holes 2 of the liquid introduction path 1 are provided around the axis 1c at intervals of 60 degrees, but the present invention is not limited to this.

As shown in FIGS. 2 and 4, the second swivel chamber 20 has partition walls 21a and 21b at both ends, and one end side (partition wall 21a side) is housed in the first cylindrical body 11. It was opened on the peripheral wall of the held cylindrical second cylindrical body 21 and the second tubular body 21 located in the first tubular body 11 along the direction forming a twisting position with the axis 21c thereof. A plurality of liquid introduction holes 22, a gas introduction path 50 for allowing gas G to flow into the second cylindrical body 21, and a central portion (axis center 21c) of the partition wall 21b at the other end of the second cylindrical body 21. It is provided with a circular through hole 23 provided at the position).

In the present embodiment, the plurality of liquid introduction holes 22 of the second tubular body 21 have a diameter of 3 mm, and these liquid introduction holes 22 are spaced about 70 degrees around the axis 21c and have a shaft. They are arranged so as to be displaced by a predetermined distance along the direction of the center 21c. As a result, the plurality of liquid introduction holes 22 are arranged so as to be arranged at predetermined intervals along a spiral centered on the axis 21c, but the present invention is not limited to this.

As shown in FIGS. 1 and 2, the gas-liquid mixing chamber 30 has a cylindrical mixing container 31 that communicates with the inside of the second tubular body 21 via a through hole 23, and a partition wall of the second tubular body 21. It is provided with a plurality of discharge holes 40 opened in the partition wall (bottom plate 41) of the mixing container 31 at a position facing the 21b. As shown in FIG. 5, the plurality of discharge holes 40 are arranged in a state of being arranged along a plurality of radiation curves L virtualized on the bottom plate 41 surface. In the present embodiment, 21 discharge holes 40 having a diameter of 2 mm are provided along the five radiation curves L, but the present invention is not limited to this.

As shown in FIGS. 1 and 2, in the gas-liquid mixing nozzle 100, the disk member 4 having the through hole 23 is fixed in one cylindrical member 5 in a state of crossing the inside of the cylindrical member 5. As a result, the first swivel chamber 10 and the gas-liquid mixing chamber 30 are partitioned. Further, in the first tubular body 11, the lower end opening 21d of the second tubular body 21 is fixed to the disc member 4 to form the second swivel chamber 20, so that the disc member 4 is first. It also has the functions of the partition wall 11b of the swivel chamber 10 and the partition wall 21b of the second swivel chamber 20. The above-mentioned structure is an example and is not limited to this.

Next, the usage and function of the gas-liquid mixing nozzle 100 shown in FIG. 1 will be described with reference to FIG. As shown in FIG. 6, the gas-liquid mixing nozzle 100 is immersed in the water W stored in the water tank 60, and the liquid introduction path 1 of the gas-liquid mixing nozzle 100 and the pump P are connected by a water pipe 62. There is. Further, a water absorption pipe 61 is piped from the pump P toward the water W in the water tank 60. The upstream side (gas feeding side) of the gas introduction path 50 of the gas-liquid mixing nozzle 100 protrudes from the water surface W1 and is arranged outside the water tank 60.

After setting the gas-liquid mixing nozzle 100 and the pump P as shown in FIG. 6, when the pump P is operated, the water W in the water tank 60 passes through the water absorption pipe 61 and the water supply pipe 62, and the gas-liquid mixing nozzle 100 It is supplied to the liquid introduction path 1 of. In parallel with this, air is supplied to the gas-liquid mixing nozzle 100 via the gas introduction path 50. In this case, the air supplied via the air body introduction path 50 is self-sucked by the intake pressure based on the decompression generated inside the second swirl chamber 20 (see FIG. 2), as will be described later.

As shown in FIG. 2, the water W supplied to the gas-liquid mixing nozzle 100 via the liquid introduction path 1 flows toward the lid 3 of the liquid introduction path 1 and then flows from the plurality of liquid outflow holes 2. It flows out into the first swivel chamber 10. As shown in FIG. 3, the plurality of liquid outflow holes 2 each have a twisting position with respect to the axis 1c (in the present embodiment, the tangential direction of the peripheral wall of the liquid introduction path 1 which is one of the above directions). The liquid swirling flow F1 is formed in the first swirling chamber 10 by the water flow flowing out from the plurality of liquid outflow holes 2.

After that, the liquid swirling flow F1 formed in the first swirling chamber 10 passes through the plurality of liquid introduction holes 22 while swirling around the second swirling chamber 20, as shown in FIGS. 2 and 4. And flows into the second swivel chamber 20. As shown in FIG. 4, the plurality of liquid introduction holes 22 each have a twisting position with respect to the axis 21c (in the present embodiment, the tangential direction of the peripheral wall of the liquid cylinder 21 which is one of the above directions). ), The water flow flowing from the plurality of liquid introduction holes 22 generates a swirling water flow around the axis 21c in the second swirl chamber 20, and also with the air introduced from the gas introduction path 50. A mixed gas-liquid swirling flow F2 is formed.

Since the gas-liquid swirling flow F2 formed in the second swirling chamber 20 rotates at high speed around the axis 21c, the decompression cavity portion X is located near the center of the gas-liquid swirling flow F2 (the region including the axis 21c). appear. The air introduced into the second swirling chamber 20 via the gas introduction path 50 flows into the decompression cavity portion X and is finely sheared by the gas-liquid swirling flow F2 rotating at high speed, so that the air is finely sheared in the gas-liquid swirling flow F2. A large amount of fine bubbles AB are generated in.

The gas-liquid swirling flow F2 containing a large amount of fine bubbles AB flows toward the partition wall 21b, passes through the through hole 23 in the center of the partition wall 21b, and becomes a turbulent flow of the gas-liquid mixed fluid F3 containing a large amount of fine bubbles AB. Then, it diffuses and flows in the gas-liquid mixing chamber 30. At this time, due to the stirring action of the turbulent flow, a large amount of fine bubbles AB are uniformly dispersed and mixed in the gas-liquid mixing fluid F3.

As shown in FIG. 2, the gas-liquid mixing fluid F3 stirred and mixed in the gas-liquid mixing chamber 30 is discharged through a plurality of discharge holes 40 provided in the bottom plate 41, and the water W in the water tank 60 is discharged. It spreads and flows in. This makes it possible to dissolve a large amount of air in the water W.

In the gas-liquid mixing nozzle 100 of the present embodiment, since the diameter of the discharge hole 40 is set to 2 mm, bubbles having a large particle size exceeding 2 mm are contained in the gas-liquid mixing fluid F3 in the gas-liquid mixing chamber 30. Even if B is generated, it is not discharged to the outside (inside the water W) of the gas-liquid mixing nozzle 100. Since the diameter of the discharge hole 40 is not limited to 2 mm, it can be set to an appropriate diameter according to the usage situation and the like.

Further, in the gas-liquid mixing nozzle 100 of the present embodiment, air is sent to the second swirl chamber 20 via the gas introduction path 50 due to the intake pressure based on the decompression generated inside the second swirl chamber 20 (see FIG. 2). Although it is self-sucked inward, it can also be pumped using an air pump (not shown) if necessary.

In the gas-liquid mixing nozzle 100 of the present embodiment, the liquid swirling flow F1 is generated in the first swirling chamber 10 and flows into the second swirling chamber 20, so that the gas-liquid swirling flow F2 rotates at high speed. Therefore, a large amount of fine bubbles AB can be efficiently generated, and the gas dissolution efficiency is increased. By introducing the liquid swirling flow F1 generated in the first swirling chamber 10 into the second swirling chamber 20, the swirling flow velocity of the gas-liquid swirling flow F2 in the second swirling chamber 20 can be increased. Therefore, even a pump P smaller than the conventional one can generate a large amount of fine bubbles AB.

Further, in the gas-liquid mixing nozzle 100, the gas-liquid mixed fluid F3 mixed with fine bubbles AB is discharged through the plurality of outflow holes 40 provided in the bottom plate 41 of the gas-liquid mixing chamber 30, so that the gas-liquid mixing fluid F3 is discharged from the discharge holes 40. It is possible to prevent bubbles B having a large particle size from being mixed in the gas-liquid mixed fluid F3 mixed with fine bubbles AB. As described above, by using the gas-liquid mixing nozzle 100, the dissolution efficiency of the gas (for example, air) in the liquid (for example, water) can be significantly increased.

As shown in FIG. 6, since a large amount of air is dissolved in the water W in the water tank 60 treated by using the gas-liquid mixing nozzle 100, when this water W is used as water for plant cultivation, the growing state of the plant Can be greatly improved. For example, the water W treated using the gas-liquid mixing nozzle 100 was used as water for hydroponic cultivation of tomatoes, or the sweet potato seedlings were immersed in the water W for a certain period of time and planted in a medium. We were able to significantly increase the yield.

Note that FIG. 6 describes a case where the gas-liquid mixing nozzle 100 is used to dissolve air in the water W in the water tank 60, but the application of the gas-liquid mixing nozzle 100 is not limited. The liquid mixing nozzle 100 can also be used in the field of dissolving various gases other than air in a liquid other than water W.

The gas-liquid mixing nozzle 100 according to the present embodiment is a gas self that passes through the gas introduction path 50 even if the pressure of the liquid R introduced from the outside via the liquid introduction path 1 is as low as about 0.02 MPa. Suction starts and fine bubbles can be generated. Therefore, it can be used with tap water and inexpensive pumps that save power, and the fields of application are greatly expanded.

Further, since the gas-liquid mixing nozzle 100 can be used even if the pressure (water pressure) of the liquid R introduced via the liquid introduction path 1 is 0.1 MPa or less, it can be safely used as a shower or the like. can do.

By providing the first swivel chamber 10 in the gas-liquid mixing nozzle 100, it is possible to provide a plurality of liquid introduction holes 22 into the second swivel chamber 20, and even with a water pressure of about 0.02 MPa, the second swirl chamber 20 can be provided. The swirling flow in 20 is generated without being disturbed. On the other hand, in the invention described in Patent Document 2, as shown in FIG. 1 in the same document, since the pressurized liquid introduction port 4 is provided at one place, the swirling flow is not disturbed in the cylindrical portion 2a. Inevitably, it is necessary to increase the pressure of the liquid supplied to the pressurized liquid introduction port 4.

In the gas-liquid mixing nozzle 100, when the gas in the gas-liquid flowing from the second swirl chamber 20 into the gas-liquid mixing chamber 30 becomes excessive and stays in the gas-liquid mixing chamber 30, the decompression cavity in the second swirl chamber 20 When the depressurization is eliminated by communicating with the part X, the intake pressure is also eliminated and the supply of the gas G from the gas introduction path 50 is stopped, so that the excess state of the gas G is prevented and the generation of large-diameter bubbles is prevented. can do. Therefore, in the gas-liquid mixing fluid F3 discharged from the discharge hole 40 of the gas-liquid mixing nozzle 100, the mixture of bubbles having a large particle size is extremely small. Further, in the gas-liquid mixing nozzle 100, since the supply amount of the gas G is always automatically adjusted, a cock (on-off valve) for adjusting the supply amount of the gas G is unnecessary.

When the gas-liquid mixing nozzle 100 is used as a shower or the like, the water pressure supplied to the liquid introduction path 1 is weakened, and the water flow discharged from the discharge hole 40 of the gas-liquid mixing nozzle 100 is positively used. Since pulsation can be generated in (gas-liquid mixed fluid F3), a comfortable massage effect can be obtained.

Further, the gas-liquid mixing nozzle 100 described with reference to FIGS. 1 to 6 and its usage and use are shown as examples, and the gas-liquid mixing nozzle of the present invention and its usage and use are described above. It is not limited to the nozzle 100.

The gas-liquid mixing nozzle according to the present invention is widely used in industrial fields such as agriculture, forestry and fisheries and livestock industry as a means for producing nanobubble water used as water for cultivation of agricultural products, drinking water for livestock animals, and water for aquaculture of fish and shellfish. can do.

1 Liquid introduction path 1c, 21c Axial center 2 Liquid outflow hole 3 Lid 4 Disc member 5 Cylindrical member 10 First swivel chamber 11 First tubular body 11a, 11b, 21a, 21b Partition wall 20 Second swivel chamber 21 Second Cylindrical body 21d Lower end opening 22 Liquid introduction hole 23 Through hole 30 Gas-liquid mixing chamber 31 Mixing container 40 Discharge hole 41 Bottom plate 50 Gas introduction route 60 Water tank 61 Water absorption pipe 62 Water supply pipe 100 Gas-liquid mixing nozzle AB Fine bubbles B Bubbles F1 Liquid swirling flow F2 Gas-liquid swirling flow F3 Gas-liquid mixed fluid G Gas L Radiation curve P Pump R Liquid W Water W1 Water surface X Decompression cavity

Claims (2)

The first swirling chamber that generates a liquid swirling flow by the liquid introduced from the outside via the liquid introduction path and the liquid swirling flow in the first swirling chamber are mixed with the gas introduced from the outside and mixed with fine bubbles. A second swirling chamber that generates a swirling flow of gas and liquid, a gas-liquid mixing chamber that flows in the swirling flow of gas and liquid in the second swirling chamber to form a turbulent flow, and a gas-liquid mixing mixture of fine bubbles in the swirling chamber. Equipped with a discharge hole of a predetermined diameter for discharging the liquid to the outside ,
The first swivel chamber has a first cylindrical body having partition walls at both ends, and a tubular liquid introduction path that penetrates one of the partition walls and is inserted toward the first tubular body. A liquid outflow hole is provided in the peripheral wall of the liquid introduction path along a direction forming a twisting position with the axis of the liquid introduction path.
The second swivel chamber has a partition wall at both ends, and at least one end side is located in the first tubular body and the second tubular body accommodated and held in the first tubular body. A liquid introduction hole formed in the peripheral wall of the second cylinder along a direction forming a twisting position with its axis, a gas introduction path for allowing gas to flow into the second cylinder, and the second cylinder. With a through hole opened in the partition wall at the other end of the shape,
A gas-liquid mixing nozzle provided with a mixing container in which the gas-liquid mixing chamber communicates with the second tubular body via the through hole, and a plurality of the discharging holes provided in the partition wall of the mixing container. .. A plurality of said discharge hole, the through hole facing the gas-liquid mixing nozzle of claim 1, wherein arranged in a state aligned along a plurality of radiation curve is virtually a partition wall surface of the mixing vessel.

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