JP5306187B2 - Gas-liquid mixing and circulation device - Google Patents

Abstract

[PROBLEMS] To provide a gas-liquid mixing and circulating device capable of efficiently mixing and stirring a gas and a fluid such as water, thereby preventing a gas-mixed liquid from stagnation of its circulation. [MEANS FOR SOLVING THE PROBLEMS] This gas-liquid mixing and circulating device (10, 100, 10a, 100a) comprises an inner tube (20) having a fluid guide part (25) at its central portion and an outer tube (11) so disposed as to provide a gap (26a) serving as a gas guide part (26) between itself and the inner tube. A mixing part (27) for mixing a gas (53) and a fluid (51) with each other is the portion of the outer tube (11) where the inner tube (20) is not disposed therein in the longitudinal direction. The mixed gas (53) and fluid (51) can flow out from one end (18) of the outer tube (11).

Description

  The present invention relates to a gas-liquid mixing / circulating device that circulates after being immersed in a fluid such as water or a mixed liquid of water and a solid, mixing and stirring a gas such as air to form a gas-liquid mixed fluid. In particular, the present invention relates to a gas-liquid mixing and circulation device that is installed in a tank containing liquid, mixes and circulates the liquid and gas, dissolves the gas in the liquid, and stirs the liquid in the tank.

2. Description of the Related Art Conventionally, gas-liquid mixing and circulation devices such as aerators, aeration devices, and aeration devices are known as devices that immerse in water and mix water and gas.
In these devices, for example, an air pipe is disposed in water, and a blowout port in which an air discharge hole is formed is provided in the pipe, and air is discharged into the water from the discharge hole of the blowout port. .
However, such a device has a problem that it is likely to be clogged because its outlet is thin and resistance is large.

Therefore, a mixing unit for mixing water and gas is provided in a cylindrical tube that opens at both ends, and air is sent from a gas nozzle tube provided below the mixing unit to mix the gas and water. A gas-liquid mixing and circulation device has been proposed (for example, Patent Document 1). And such an apparatus is immersed in water and used.
Further, in such an apparatus, a nozzle tube is disposed at a substantially central portion in a cylindrical tube, and gas is sent from the nozzle tube into the cylindrical tube. And water is drawn in from the inside of a cylindrical pipe | tube and between a nozzle pipe | tube by the levitation | floating force of the gas sent from this nozzle pipe | tube.
Then, the drawn water and gas are mixed and stirred by the mixing unit provided above the nozzle tube, and the mixed liquid of water and gas is discharged from one discharge hole in the cylindrical tube. And by the water flow of the liquid mixture discharge | released from such an apparatus, a convection arises in water and the inside of water is stirred.
According to such an apparatus, since the nozzle tube which sends gas is large, clogging does not occur. In addition, since the stirring efficiency is good and there is no need to lay pipes, the equipment cost and the like can be reduced.

And this gas-liquid mixing circulation apparatus is provided with the mixing part in the upper part of the nozzle tube for sending the gas provided in the approximate center part. The mixing portion is configured to turn and disperse the gas drawn from the nozzle tube outward from the substantially cylindrical central portion. The mixing portion has a substantially cylindrical central portion, and is provided with a core portion substantially on the same line as the nozzle tube, and a spiral wing is provided around the core portion. ing.
For this reason, after the gas sent from the nozzle tube is discharged from the opening of the nozzle tube, it collides with the core of the mixing unit. Then, the gas is dispersed and floats and rises while swirling along the spiral wings provided in the core.

And by this gas levitation force, water is drawn into the cylindrical interior of the device, the water and the gas are raised while being mixed, and discharged from the discharge hole at the cylindrical end as a mixed liquid.
JP 2001-62269 A (FIG. 1)

However, as described above, when the gas sent from the nozzle tube collides with the core portion of the mixing portion, the gas is once returned downward, and the ascending force due to levitation is reduced.
For this reason, when solid matter etc. are mixed in water, for example, it is necessary to suck water etc. into the cylindrical inside of such a device with the solid matter. However, since the force for sucking into the cylindrical interior of the device is weakened by the reduction of the rising force, the solid matter stagnates near the water suction port of the device. Moreover, the problem that the mixing ratio of gas and liquid also falls arises, and the problem that the circulation of a liquid mixture does not work arises.

  Therefore, an object of the present invention is to efficiently mix and agitate a fluid such as gas and water so that the circulation of the mixed solution is not delayed.

In the first invention, the above object is a gas-liquid mixing and circulating device for mixing and circulating a gas in a fluid, wherein an inner cylinder having a hole in the center thereof, an outer peripheral side surface of the inner cylinder, has an outer cylinder which is disposed with a gap, wherein the gap between the inner circumferential surface of the outer cylinder and the outer circumferential surface of said inner cylinder, a gas guide portion for guiding the gas, said The hole portion of the cylinder is a fluid guiding section that guides the fluid without arranging an object that obstructs the flow of the fluid, and the length of the inner cylinder in the longitudinal direction is the longitudinal direction of the outer cylinder The mixing portion that mixes the gas and the fluid is formed in a portion of the outer cylinder where the inner cylinder is not disposed on the inner side, and the mixture is mixed in the mixing section. the gas and the fluid being adapted to escape from one end of the outer cylinder, before in the mixing unit A plurality of protrusions are disposed on the inner peripheral side surface of the outer cylinder, and when the protrusions are directly opposed to the inner peripheral side surface, the protrusion has a drop shape that is tapered on the downstream side and circular on the upstream side. This is achieved by a gas-liquid mixing and circulation device characterized by

  According to the configuration of the first aspect of the present invention, the inner cylinder having the hole in the central portion, the outer cylinder side surface of the inner cylinder and the outer cylinder arranged with a gap, the outer cylinder side surface of the inner cylinder and the outer cylinder The gap on the inner peripheral side surface of the cylinder is a gas guiding part that guides the gas. And the hole of the center part of an inner cylinder is a fluid guide part which guides a fluid. Furthermore, the length in the longitudinal direction of the inner cylinder is shorter than the length in the longitudinal direction of the outer cylinder, and the mixing section that mixes gas and fluid is provided in the portion where the inner cylinder is not arranged inside the outer cylinder. Is formed. And the gas and fluid mixed by the mixing part come out from one edge part of an outer cylinder.

For this reason, the hole of the inner cylinder is used as a passage for fluid, and a large amount of fluid can be drawn. Then, the gas passes through the gap between the inner cylinder and the outer cylinder, enters the mixing portion formed in the portion of the outer cylinder where the inner cylinder is not disposed inside, and is mixed with the fluid. . Therefore, since there is no place that blocks the passage of gas, the buoyancy of gas is not disturbed.
Therefore, a large amount of fluid and gas can be drawn into the mixing unit, and the efficiency of mixing and stirring of the gas and fluid is increased. And since a large amount of fluid is drawn in, circulation does not stagnate.
Further, according to the configuration of the first invention, since the plurality of protrusions are arranged on the inner peripheral side surface of the outer cylinder in the mixing portion, the gas induced from the gas guiding portion hits this protrusion, The gas is finely crushed and the gas and fluid can be mixed efficiently.

According to a second invention, in the configuration of the first invention , both ends of the inner cylinder and the outer cylinder are opened, and one end side of the inner cylinder and one end side of the outer cylinder are in substantially the same plane. The inner cylinder is disposed, and the gap between the one end side of the inner cylinder and the outer cylinder arranged in the substantially same plane is connected, and the fluid is arranged in the substantially same plane. It is guided to the hole of the inner cylinder from the one end side.

According to the structure of 2nd invention , the both ends of an inner cylinder and an outer cylinder are open | released, and the one end side is arrange | positioned in the substantially same surface. And the gap | interval of the inner cylinder and outer cylinder which are arrange | positioned in the substantially the same surface is connected. Then, the fluid is guided to the hole of the inner cylinder from one end side of the inner cylinder arranged in substantially the same plane.
For this reason, the fluid is drawn from the lower side of the inner cylinder so that the gas passes through the gap with the outer cylinder, and the gas is mixed in the upper mixing section without losing buoyancy. Yes.

According to a third aspect of the present invention, in the configuration of the first aspect , the other end of the outer cylinder is an outer cylinder bottomed part, and the inner cylinder is one end of the inner cylinder bottomed part, The bottom portion with the outer cylinder and the bottom portion with the inner cylinder are arranged to face each other with a gap therebetween, and a gas introduction portion for introducing the gas is provided in the vicinity of the bottom portion with the outer cylinder. A fluid introduction part for introducing the fluid is arranged in the vicinity of the inner cylinder bottomed part, and the gas introduced from the gas introduction part is disposed between the outer cylinder bottomed part and the inner cylinder bottomed part. It passes through the opposing surface side and is guided to the gas guiding part.

According to the configuration of the third aspect of the invention , one of the outer cylinders is opened so that the mixed liquid can escape, and the other is a bottomed portion of the outer cylinder. The inner cylinder has an inner cylinder bottom portion at one end. And the outer cylinder bottom part and the inner cylinder bottom part are arrange | positioned so that it may provide a space | interval and may be opposed. Further, a gas introduction part for introducing gas is arranged in the vicinity of the bottom part with the outer cylinder, and a fluid introduction part for introducing a fluid is arranged in the vicinity of the bottom part with the inner cylinder. And the gas introduce | transduced from the gas introduction part passes along the opposing surface side between an outer cylinder bottom part and an inner cylinder bottom part, and is induced | guided | derived to a gas induction | guidance | derivation part.
For this reason, the gas introduced from the gas introduction part passes through the space between the inner cylinder bottomed part and the outer cylinder bottomed part and is guided to the gas guiding part in the gap between the inner peripheral side surface of the outer cylinder and the outer peripheral side surface of the inner cylinder. When flowing, it flows uniformly. Accordingly, the buoyancy of the gas guided to the gas guiding portion is made uniform, and accordingly, the drawing of the fluid guided to the inner peripheral surface side of the inner cylinder is made uniform.

  According to the gas-liquid mixing and circulating apparatus of the present invention, gas and fluid can be mixed and stirred efficiently, and the circulation of the mixed liquid will not be delayed.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the examples described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. It is not restricted to these unless there is description of.

(First embodiment)
1 to 7 are schematic views showing a preferred embodiment of the gas-liquid mixing and circulating apparatus 10 according to the first embodiment of the present invention.
FIG. 1 is a schematic perspective view showing the entire gas-liquid mixing / circulation apparatus 10, and a part thereof is cut away so that the inside can be easily explained. FIG. 2 is a schematic perspective view for explaining the inner cylinder 20 disposed inside the outer cylinder 11 of the gas-liquid mixing and circulating apparatus 10, and FIG. 3 is a schematic front view from the X1 direction of FIG. 4 is a schematic front view from the X2 direction in FIG. 2, and FIG. 5 is a schematic top view from the Z1 direction in FIG.
FIG. 6 is a schematic explanatory diagram for explaining the state of the gas 53 and the fluid 51 in the operating state of the gas-liquid mixing and circulating apparatus 10. FIG. 7 is a schematic end view for explaining a state in which the gas-liquid mixing and circulating apparatus 10 of the present embodiment is installed and operated in the water tank 56. The gas-liquid mixing and circulating apparatus 10 is a schematic perspective view of FIG. It is the schematic end elevation cut | disconnected by the AA line in a figure.

FIG. 1 is a schematic explanatory view in which a part of the gas-liquid mixing and circulating apparatus 10 is cut away.
The gas-liquid mixing / circulating device 10 includes an inner cylinder 20 having a hole 25a at the center, and an outer cylinder 11 disposed with an inner cylinder outer peripheral surface 12 that is an outer peripheral surface of the inner cylinder 20 and a gap 26a. doing. The hole 25 a is a through hole that penetrates in the longitudinal direction of the inner cylinder 20.
The length of the inner cylinder 20 in the longitudinal direction is shorter than the length of the outer cylinder 11 in the longitudinal direction. That is, in the drawing, the length of the inner cylinder 20 in the Z direction is shorter than the length of the outer cylinder 11 in the Z direction, and is about half the length of the outer cylinder 11 in the Z direction. It has become.
And as for the inner cylinder 20 and the outer cylinder 11, the Z2 side in a Z direction is made into the upper side, and the Z1 side is made into the lower side. That is, the upper side, which is the Z2 side, is the side from which the gas and fluid are mixed to exit as a mixed liquid, and the lower side, which is the Z1 side, is the side from which the fluid and gas are drawn.

The lower side Z1 side is arranged so that the inner cylinder 20 and the outer cylinder 11 form substantially the same plane, and the gap 26a between the inner cylinder 20 and the outer cylinder 11 in this plane is connected to the connecting portion 17. It has become. That is, the inner cylinder 20 and the outer cylinder 11 being disposed in substantially the same plane means that the inner cylinder 20 and the outer cylinder 11 are easily connected to each other on the lower side. The connecting portion 17 is also a fixing portion that fixes the inner cylinder 20 inside the outer cylinder 11. The inner cylinder 20 is fixed to a position below about half of the length of the outer cylinder 11 in the longitudinal direction by the connecting portion 17. And the Z1 side which is the lower side of the inner cylinder 20 is opened, and serves as an inner cylinder lower side opening 21a. The inner cylinder lower opening 21 a serves as a fluid inlet 21 when the fluid is drawn into the hole 25 a of the inner cylinder 20.
The hole portion 25a of the inner cylinder 20 serves as a fluid guiding portion 25 for guiding the fluid drawn from the fluid drawing port 21 to the mixing portion 27 described later. The fluid drawn from the fluid drawing port 21 is guided to the mixing portion 27 through the hole portion 25a which is the inner cylinder inner peripheral surface side 22 of the inner cylinder 20. That is, the hole portion 25 a that is the inner cylinder inner peripheral surface side 22 of the inner cylinder 20 is a fluid guiding section 25.

And since the hole part 25a of this inner cylinder 20 is opened largely, the quantity which draws in fluid increases.
Further, the inner cylinder 20 and the outer cylinder 11 are disposed with a gap 26a from the lower connecting portion 17 toward the upper Z2 side. This gap 26 a serves as a gas guiding portion 26. The gas guiding portion 26 is formed over the same range as the height in the Z direction, which is the length of the inner cylinder 20 in the longitudinal direction. That is, the gas guide portion 26 is a surface where the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 and the outer cylinder inner peripheral side surface 12 of the outer cylinder 11 correspond with the gap 26 a. The gap 26a is formed as a slight gap and is preferably provided uniformly. For example, the gap 26a is smaller than the opening area of the inner cylinder upper opening 28a or the inner cylinder lower opening 21a, which is the size of the hole 25a of the inner cylinder 20. For example, the gap 26a is between the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 and the outer cylinder inner peripheral side surface 12 of the outer cylinder 11, and is considered as a cross-sectional area that is an area of a surface perpendicular to the Z direction, which will be described later. When the cross-sectional area which is the area of the surface along the Z direction of the air ventilation hole 13 is compared, it sets so that it may become the same magnitude | size or a small area.

That is, for example, when the air blowing hole 13 is a cylindrical pipe having a thickness of 2 mm and an outer diameter of 48.6 mm, the inner diameter of the air blowing hole 13 is 44.6 mm. And when the piping which is this air ventilation hole 13 is cut | disconnected by the surface which cross | intersects a longitudinal direction perpendicularly | vertically, a cross section becomes circular, and the cross-sectional area which is the area of this circle | round | yen will be about 1561.49 mm2. Here, the longitudinal direction is a direction extending perpendicularly to the outer diameter and inner diameter of the air blowing hole 13 and is a direction perpendicular to the Z direction on the drawing. That is, in the drawing, the air in the air blowing holes 13 is sent from the outside to the inside. Therefore, the cross-sectional area is a circle whose diameter is the inner diameter obtained by removing the thickness of the pipe from the outer diameter of the pipe which is the air blow hole 13 when the air blow hole 13 is cut in the direction along the Z direction on the drawing. It is an area.
When the outer diameter of the outer cylinder 11 is 139.8 mm and the thickness is 2 mm, the area of the surface surrounded by the inner peripheral side surface 12 of the outer cylinder, that is, the area of the circle is about 14519. 36 mm2. Here, the cross-sectional area of the outer cylinder 11 is an area of a surface perpendicular to the Z direction on the drawing, and is a surface surrounded by the inner peripheral side surface 12 of the outer cylinder.
Next, when the gap 26a is 2 mm, the area of the surface surrounded by the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 is about 13677.54 mm2.
Here, the surface surrounded by the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 has a circular shape, and the area of the cross section when the inner cylinder 20 is cut by a plane perpendicular to the longitudinal direction of the inner cylinder 20. It has become. That is, in the drawing, it is an area when cut along a plane perpendicular to the Z direction, and is an area of a circle whose diameter is the outer diameter of the inner cylinder 20.
When the gap 26a is considered as the area of the surface perpendicular to the Z direction between the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 and the outer cylinder inner peripheral side surface of the outer cylinder 11, it is about 841.52 mm2. Therefore, the area of the gap 26 a is about 53% with respect to about 1561.49 mm 2 which is the cross-sectional area of the air blowing hole 13.

  The gap 26a is such that the gas 53 is blown from the air blowing hole 13, passes through the gas guiding part 26, which is the gap 26a, and reaches the mixing part 27, and the pressure loss is suppressed to about 0.975 kilopascals or less. When the gas 53 is guided to the mixing unit 27 through the gas induction unit 26a, the gas velocity is set to a speed nearly double the velocity of the gas 53 flowing through the air blowing hole 13. It is preferable. Therefore, the cross-sectional area of the gap 26 a is preferably about half of the cross-sectional area of the air blowing hole 13.

A mixing unit 27 is formed above the gas guiding unit 26.
That is, a mixing portion 27 that mixes the gas 53 and the fluid 51 is formed in a portion of the outer cylinder 11 where the inner cylinder 20 is not disposed inside. That is, the mixing portion 27 is a portion other than a portion that coincides with the length in the longitudinal direction of the inner cylinder 20 in the length in the longitudinal direction of the outer cylinder 11, and is located above the position where the inner cylinder 20 is disposed. Is formed.
A plurality of protrusions 15 are arranged on the inner peripheral side surface 12 of the outer cylinder 11 where the mixing portion 27 is formed. The Z2 side above the outer cylinder 11 is an opening 18 and is a mixed liquid discharge part 19.

In addition, an air blowing hole 13 is provided below the outer cylinder 11. The air blowing hole 13 is provided in a portion where the inner cylinder 20 inside the outer cylinder 11 is disposed.
The air blowing hole 13 is provided with a support portion 14 for supporting the gas-liquid mixing and circulation device 10, and a support base 16 is provided so as to be connected to the support portion 14. This support base 16 is fixed to the installation location of the gas-liquid mixing and circulating apparatus 10 with, for example, screws.

As shown in FIGS. 3 to 5, the inner cylinder 20 has a spiral air guide portion 24 on the outer peripheral side surface 23 of the inner cylinder. The spiral air guide portion 24 is an example of a gas guide portion, and is also an example of a spiral protrusion.
Then, both end portions in the longitudinal direction of the inner cylinder 20 are open portions. And the open part of the both ends of this longitudinal direction of the inner cylinder 20 is made into the inner cylinder lower side opening part 21a and the inner cylinder upper side opening part 28a, respectively. That is, the inner cylinder lower opening 21 a and the inner cylinder upper opening 28 a are formed at both ends of the inner cylinder 20 in the Z direction.
The inner cylinder lower opening 21 a is a fluid inlet 21, and the inner cylinder upper opening 28 a is a fluid discharge part 28. And the inner cylinder lower side opening part 21a is made into the side close | similar to the installation surface at the time of installing the gas-liquid mixing and circulating apparatus 10.

Further, as shown in FIG. 2, the spiral air guide part 24 is provided as a spiral protrusion on the inner cylinder outer peripheral side surface 23 of the inner cylinder 20. That is, the spiral air guide 24 extends upward from the fluid inlet 21 which is the lower inner opening 21a of the inner cylinder 20 and then extends around the inner cylinder outer peripheral surface 23 of the inner cylinder 20 approximately. It forms to the vicinity of the upper inner cylinder upper side opening part 28a, making a round. That is, as shown in FIG. 3, when viewed from the X1 direction in FIG. 2, the spiral air guide portion 24 extends upward from the inner cylinder lower opening 21 a and then bends to the right side in the drawing. It is formed so as to extend slightly diagonally upward, and then extend around the rear again to extend from the left side toward the upper inner cylinder upper opening 28a. And as shown in FIG. 4, when it sees from the X2 direction of FIG. 2, the state of the spiral air guide part 24 at the time of turning back in FIG. 3 is shown. That is, in FIG. 4, the spiral air guide portion 24 is at a position that is about half of the length in the longitudinal direction that is the Z direction, and goes obliquely upward from the left side to the right side in the drawing. Is growing. Thereafter, the spiral air guide 24 is formed so as to extend from the left side in FIG. 4 toward the upper inner cylinder upper opening 28a. FIG. 5 is a schematic top view of the inner cylinder 20 as viewed from the Z1 side in the Z direction. That is, FIG. 5 is a view of the inner cylinder 20 as viewed from above, and has a substantially circular shape. The spiral air guide portion 24 described above is formed around the substantially circular shape so as to make a round.
The spiral air guide portion 24 is provided as a spiral protrusion formed on the inner cylinder outer peripheral surface 23 of the inner cylinder 20. For example, a wire-like member is provided on the inner cylinder outer peripheral surface 23 of the inner cylinder 20. It can also be formed by wrapping.
Moreover, the spiral air guide part 24 may be formed in the outer cylinder inner peripheral side surface 12 side of an outer cylinder.

FIG. 6 is a schematic explanatory diagram for explaining the flow of the gas 53 and the fluid 51 and the state in which the gas 53 and the fluid 51 are mixed and stirred when the gas-liquid mixing and circulating apparatus 10 is operated.
FIG. 6 schematically shows the state of each flow with arrows in order to describe the swirl vortex 54 showing the mixed state of the gas 53, the fluid 51, and the gas 53 and the fluid 51, respectively. The gas 53, the fluid 51, the swirl vortex 54, etc. are not necessarily separated in this way, but are shown separately for convenience of explanation.
According to FIG. 6, the air blowing hole 13 is connected to a blower, an inverter, and a power source (not shown) disposed outside a water tank 56 (not shown) through a pipe 52 (not shown) (see FIG. 7). . When the power is turned on, the gas 53 is blown from the blower through the inverter.
Then, the gas 53 is sent through the pipe 52 (not shown) and through the air blowing hole 13 to the gas guiding portion 26 that is the gap 26 a between the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 and the outer cylinder inner peripheral side surface 12 of the outer cylinder 11. . Then, the sent gas 53 is guided by the spiral air guide portion 24 formed on the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 so as to turn around the outer cylinder inner peripheral side surface 12 of the outer cylinder 11, and rises. To do.

And the fluid 51 is drawn in from the inner cylinder lower side opening part 21a of the inner cylinder 20 with the buoyancy at the time of this gas 53 going up. Here, the inner cylinder lower opening 21 a serves as a fluid inlet 21, and a large amount of fluid 51 is guided from the inner cylinder lower opening 21 a to the inner cylinder inner peripheral surface side 22 of the inner cylinder 20. The inner cylinder 20 has a hole 25 a, and the hole 25 a which is a through hole penetrating the inner cylinder inner circumferential surface 22 along the longitudinal direction of the inner cylinder 20 is a fluid for inducing the fluid 51. The guidance unit 25 is used.
Therefore, the fluid 51 drawn from the fluid drawing port 21 flows through the fluid guiding portion 25 from the inner cylinder lower opening portion 21a of the inner cylinder 20 toward the inner cylinder upper opening portion 28a by gas buoyancy.
Then, the gas 51 passes through the gap 26a and is guided by the spiral air guide portion 24 formed on the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 to turn the outer cylinder inner peripheral side surface 12 of the outer cylinder 11. The Then, the gas 53 that has been induced and raised passes through the fluid guiding portion 25 of the inner cylinder 20, and is mixed and stirred in the mixing portion 27 with the fluid 51 that has been raised by the buoyancy of the gas 53.
At this time, the gas 53 is finely crushed by the plurality of protrusions 15 disposed on the outer peripheral surface 23 of the outer cylinder 11.
Therefore, the gas 53 that has risen so as to swirl the outer cylinder inner peripheral side surface 23 of the outer cylinder 11 as a lump of gas 53 hits the plurality of protrusions 15 and becomes fine particles, and further the inner cylinder inner circumference of the outer cylinder 11. The side 12 is raised so as to turn. Then, as the gas 53 rises, the fluid 51 is mixed and stirred with the gas 53 in the mixing unit 27, swirled and raised to be a mixed liquid of the gas 53 and the fluid 51, and the outer cylinder. The swirl vortex 54 is discharged from the mixed liquid discharge portion 19 which is the opening 18 of the eleventh portion.

That is, as shown in FIG. 7, the gas-liquid mixing and circulating apparatus 10 is installed and used near the bottom of the water tank 56 with the support base 16 fixed with, for example, screws. That is, the gas-liquid mixing and circulating device 10 is used by being immersed in the fluid 51.
When the gas 53 is blown from the pipe 52 connected to the air blowing hole 13 of the gas-liquid mixing / circulating device 10 as described above, the gas 53 passes through the gas guiding portion 26 of the gap 26a, and the gas 53 passes through the outer cylinder 11. It is guided to turn on the inner peripheral side surface 12 of the outer cylinder, and is sent to the mixing unit 27. Then, along with the upward flow due to the buoyancy of the gas 53, the fluid 51 is drawn from the fluid inlet 21 of the inner cylinder lower opening 21 a, and passes through the fluid guide portion 25, which is the hole 25 a of the inner cylinder 20. Guided to part 27. In the mixing unit 27, the gas 53 is swirled and mixed with the fluid 51. Then, the mixed gas 53 and fluid 51 become a swirl vortex 54 and are discharged from the mixed liquid discharge portion 19 of the opening 18. The discharged mixed solution of the gas 53 and the fluid 51 convects 55 in the water tank 56, and is again drawn from the fluid drawing port 21 of the inner cylinder 20, mixed with the gas 53, and stirred.

In the gas-liquid mixing / circulation apparatus 10, the inner cylinder lower side opening 21 a of the inner cylinder 20, which is the fluid inlet 21, is greatly opened so that a large amount of fluid 51 can be drawn.
Further, a gap 26a between the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 and the outer cylinder inner peripheral side surface 12 of the outer cylinder 11 serves as a gas guiding part 26, and the gas 53 passes through the gas guiding part 26 and is mixed. Sent to section 27.
And unlike the conventional gas-liquid mixing and circulating apparatus, the gas guiding part 26 is not formed in the central part, and when the gas 53 is sent to the mixing part 27, a swirling flow is applied to the central part of the gas guiding part 26. The core part provided with the wing | blade for forming is not formed. Therefore, when the gas 53 is sent from the gas guiding unit 26 to the mixing unit 27, the gas 53 is not disturbed, so that the buoyancy of the gas 53 is not weakened, and the gas is applied to the outer peripheral surface 12 of the outer cylinder 11. 53 can be sent while forming a swirling flow, so that the fluid 51 drawn in with the buoyancy of the gas 53 is drawn into the gas-liquid mixing and circulation device 10 smoothly.

Here, for example, the case where this gas-liquid mixing and circulating apparatus 10 is used in a water tank 56 for sewage treatment or the like will be described. In such sewage treatment, a method of decomposing sludge in sewage by microorganisms may be employed. In order for microorganisms to decompose sludge, it is necessary that a large amount of air such as oxygen or nitrogen is dissolved in water. Further, in order to propagate these microorganisms and form a colony which is a lump, solid particles such as resin particles having pores and sponges are dispersed in water. And this solid substance is a substantially square body of about 2 mm to 3 mm, or a spherical body of about 2 mm to 3 mm in diameter, etc., and has a specific gravity that is about the same as, slightly lighter or slightly heavier than water. About 30 to 70% of the volume is mixed. Preferably, about 40 to 50% is mixed, it is favorable for the growth of microorganisms.
For sewage treatment, it is preferable that microorganisms propagate well, and for that purpose, it is preferable that the mixing rate of air in water is high.

  However, if a core portion is formed at the center of the gas guiding portion as in the prior art, the gas hits the core portion and is pushed back once, thereby reducing the buoyancy of the gas. Therefore, since the fluid is drawn into the apparatus along with the buoyancy of the gas, when the buoyancy of the gas is weakened, the force of drawing the fluid is also weakened. Therefore, when solids are mixed in water, if the amount of solids increases, if the pulling force is weak, water is drawn and circulated, but the solids are not circulated, It will begin to accumulate below. Then, the propagation of microorganisms that decompose sludge is hindered, and the treatment of sewage does not proceed smoothly.

On the other hand, in the case of the gas-liquid mixing and circulating apparatus 10 according to the first embodiment, the gas guiding part 26 is not the center part but the gap 26a between the outer cylinder 11 and the inner cylinder 20 as described above. Therefore, the gas is sent to the mixing unit 27 so as to turn around the outer peripheral surface 12 of the outer cylinder 11. The fluid passes through the fluid guiding portion 25 of the hole portion 25 a of the inner cylinder 20 and is sent to the mixing portion 27.
The gas sent so as to swivel on the outer cylinder inner peripheral surface 12 of the outer cylinder 11 is not obstructed and pushed back as in the prior art. Therefore, the force of the drawn fluid is drawn by the buoyancy of the gas. There is no weakening. Moreover, the inner cylinder inner peripheral surface side 22 of the inner cylinder 20 that is largely opened is a fluid guiding portion 25 for guiding fluid.

For this reason, even if the water contains a large amount of solid matter as described above, the hole 25a is a through-hole penetrating in the longitudinal direction of the inner cylinder 20 on the inner peripheral surface side of the inner cylinder 20. The water containing solid matter is drawn into the fluid guiding portion 25. And since the fluid guide | induction part 25 is the inner cylinder inner peripheral surface side 22 of the inner cylinder 20 opened largely, even if it is the water in which the solid substance is contained, it can draw in in large quantities.
In the mixing unit 27, the air as the gas thus induced and the water containing the solid matter are mixed, stirred, turned into a swirl vortex 54, discharged from the mixed solution discharge port 19, and stored in the water tank 56. Convection 55 occurs. And the water containing this solid substance is suck | inhaled from the fluid inlet 21, and comes to circulate. Accordingly, a large amount of air for propagating microorganisms is dissolved in the water, so that wastewater can be treated efficiently. Moreover, since the force which draws in a fluid is strong, the water in which the solid substance is contained can be drawn in, and only a solid substance does not accumulate.

And the gas-liquid mixing and circulating apparatus 10 of this embodiment induces gas from the conventional central part, and when compared with the gas-liquid mixing and circulating apparatus in which the core part is provided on the upper part, for example, the following When measured by the experimental method, the mixing ratio of the air mixed in the liquid is improved by about 30%.
For example, the fluid is prepared by dissolving cobalt chloride (CoCl2) in well water as a catalyst and then dissolving a suitable amount of sodium sulfite (Na2SO3). Next, this liquid is put in the water tank 56, and the dissolved oxygen concentration (hereinafter referred to as “DO value”) in the liquid put in the water tank 56 is set to 0 ppm. Then, for example, an aerator as the gas-liquid mixing and circulating device 10 is installed in the water tank 56 containing the liquid. And the ventilation to the gas-liquid mixing circulation apparatus 10 is started, the change with time of the DO value in the tank is measured, and the change of the oxygen absorption efficiency due to the water depth and the amount of ventilation is grasped. Here, the oxygen absorption efficiency is the oxygen dissolution efficiency and is the mixing ratio of air mixed in the liquid. Further, the water tank 56 is a tank having an effective volume of 30.4 m 3, and a liquid is placed so as to have a water depth of 5 m. The measurement result when the amount of air blown to the aerator, which is a gas-liquid mixing / circulation device, is 1 Nm 3 / min, the oxygen dissolution efficiency was 10% in the conventional type, whereas the gas-liquid mixing of the present embodiment In the circulation device 10, it is 13.6%, which is improved by about 30% compared to the conventional type.

  Here, at least a portion of the outer cylinder 11 of the gas-liquid mixing and circulating apparatus 10 according to the first embodiment in which the inner cylinder 20 is disposed is formed of, for example, a metal such as stainless steel. And the air ventilation hole 13, the support stand 14, and the support part 16 may be similarly formed with metals, such as stainless steel. Further, the inner cylinder 20 may also be formed of a metal such as stainless steel.

  And the part in which the inner cylinder 20 of the outer cylinder 11 is not arrange | positioned at least is formed with resin, such as a polypropylene, for example, The some cylinder 15 is arrange | positioned at least with the inner cylinder 20 of this outer cylinder 11. It is preferable that it is made of the same material as the non-existing portion. The plurality of protrusions 15 are arranged alternately in the longitudinal direction of the outer cylinder 11. That is, between the protrusion 15 and the protrusion 15 that are arranged at a certain interval in the circumference of the inner cylinder side surface 12 of the outer cylinder 11 and further arranged at a certain interval in the circumference. Then, the next protrusion 15 is arranged at a certain interval in the longitudinal direction from the position.

  The arrangement of the plurality of protrusions 15 is appropriately adjusted in number and arrangement according to the properties of the gas and fluid, the size of the gas-liquid mixing and circulation device, etc., so as to increase the mixing and stirring efficiency of the gas and fluid. Can be set. Further, in the drawing, the shape of the plurality of projecting portions 15 is a substantially conical shape in which the head portion is slightly larger and rounded, and the neck portion supporting the head portion has a slightly narrower tip than the head portion. . In other words, the protrusion 15 has a substantially mushroom shape. However, this shape or the like is also an example, and the protrusion 15 is not limited to this shape, and is a substantially hemispherical protrusion 15, a substantially columnar shape, a substantially prismatic shape, a substantially conical shape, a substantially pyramidal shape, or the like. It may be. The number and arrangement of the protrusions 15 are appropriately determined according to the properties of the gas 53 and the fluid 51, the size of the gas-liquid mixing and circulation device 10 and the like so as to increase the mixing and stirring efficiency of the gas 53 and the fluid 51. Etc. can be set.

Further, the gas-liquid mixing / circulation device 10 may be entirely formed of a metal such as stainless steel, or may be formed of a resin such as propylene.
That is, the material of the gas-liquid mixing and circulating apparatus 10 is appropriately selected according to the properties of the fluid or the like that uses the gas-liquid mixing and circulating apparatus 10.

(Second Embodiment)
8 and 9 are a schematic perspective view in which a part of the gas-liquid mixing / circulation apparatus 100 according to the second embodiment is cut away for explanation, and a state of use of the gas-liquid mixing / circulation apparatus 100. It is a schematic perspective view.
Since the second embodiment is identical in many configurations to the first embodiment, the same configurations are denoted by the same reference numerals, description thereof is omitted, and differences are mainly described.
Further, the materials of the outer cylinder 11 and the inner cylinder 20, and the materials of the support portion 14, the support base 16, the air blowing holes 13, and the like are the same as those in the first embodiment. The protrusion 15 is the same as that in the first embodiment. In addition, in FIG. 9, the fluid 51, the gas 53, the swirl vortex 54, and the like are also indicated by arrows for convenience of explanation, and are the same as in the first embodiment.
Further, the spiral air guide portion 240 is different from the spiral air guide portion 24 in the first embodiment only in the arrangement, and other materials, formation methods, functions, etc. are the first. This is the same as the embodiment. That is, the spiral air guide portion 240 is formed as a spiral protrusion over the inner cylinder outer peripheral side surface 23 between both ends in the longitudinal direction of the inner cylinder 20. The spiral air guide portion 24 of the first embodiment is formed on the inner cylinder outer peripheral side surface 23 of the inner cylinder 20 for about one revolution, whereas it is formed on about two revolutions.

The difference from the first embodiment is that the inner cylinder 20 and the outer cylinder 11 are not open at both ends, and the lower sides of the inner cylinder 20 and the outer cylinder 11 are not arranged in the same plane. is there.
In the first embodiment, the hole portion 25a of the inner cylinder 20 is a through-hole penetrating along the longitudinal direction of the inner cylinder 20, whereas in the second embodiment, the hole 20a of the inner cylinder 20 is formed. The hole portion 250a has an inner cylinder bottomed portion 210 and is not a through hole.
That is, in the first embodiment, the inner cylinder lower opening 21a is the fluid drawing port 21, whereas the second perspective view shown in FIG. In the embodiment, the inner cylinder lower side opening portion 21 a is not provided, and instead an inner cylinder bottomed portion 210 is provided. Instead of the fluid inlet port 21, a fluid drawing portion 212 provided near the inner cylinder bottomed portion 210 is provided. The fluid inlet 211 is provided.
The fluid drawing portion 212 is provided on the opposite side of the air blowing hole 13 of the outer cylinder 11. That is, the fluid drawing-in part 212 is a position on an extension line passing through the substantially central part of the outer cylinder 11 and the inner cylinder 20 from the position where the air blowing hole 13 is provided, and is substantially symmetric with the position of the air blowing hole 13. It is provided in the inner cylinder 20 so that it may become a position.
And the fluid drawing-in part 212 is provided so that the outer cylinder 11 may be penetrated, and the fluid around the gas-liquid mixing circulation apparatus 100 can be drawn in now.
Here, the fluid drawing-in part 212 is an example of a fluid introducing part.

  Further, the Z1 side in the Z direction, which is the lower side of the outer cylinder 11, is also an outer cylinder bottomed portion 110. And the support part 14 is provided in the outer side of this outer cylinder bottomed part 110 and the side in which the inner cylinder 20 is not arrange | positioned. The gas-liquid mixing and circulating apparatus 100 can be supported and installed by the support base 16 at the other end of the support part 14. In the vicinity of the outer cylinder bottomed portion 110, an air blowing hole 13 which is an example of a gas introducing portion is provided.

And the inner cylinder bottomed part 210 and the outer cylinder bottomed part 110 are arrange | positioned facing each other at intervals.
For this reason, in the gas-liquid mixing and circulating apparatus 100 in the second embodiment, the gas 53 sent from the air blowing hole 13 passes through the opposing surface side of the inner cylinder bottomed portion 210 and the outer cylinder bottomed portion 110. Yes. That is, after the gas 53 is sent from the air blowing hole 13, it passes between the inner cylinder bottomed portion 210 and the outer cylinder bottomed portion 110 side, and is in all directions of the gap 26 a between the outer cylinder 11 and the inner cylinder 20. It begins to flow over.
Then, the gas 53 passes through the gas guiding portion 26 that is the gap 26a and is guided and sent upward. That is, the gas 53 is sent toward the Z2 side in the Z direction on the drawing. At this time, the gas 53 is reliably swirled by the spiral air guide part 24 formed in the gas guiding part 26, swirled on the outer cylinder inner peripheral side surface 12 of the outer cylinder 11, and supplied to the mixing part 27. Sent.

Then, due to the buoyancy of the gas 53, the fluid 51 is drawn from the fluid drawing port 211 of the fluid drawing portion 212 into the hole portion 250 a inside the inner cylinder 20, rises through the inner cylinder inner peripheral surface side 22, and is mixed Guided to part 27. That is, the fluid 51 passes through the fluid guide portion 25 that is the hole 250 a inside the inner cylinder 20 and is guided from the fluid discharge portion 28 to the mixing portion 27.
As in the first embodiment, the gas 53 and the fluid 51 are mixed and stirred by the mixing unit 27 and discharged from the mixed liquid discharge unit 19 which is the opening 18 of the outer cylinder 11. .

That is, in FIG. 9, the gas 53, the fluid 51, and the swirl vortex 54 are respectively sent from the air blowing holes 13 into the outer cylinder 11 as schematically indicated by arrows. Then, since the outer cylinder bottomed part 110 and the inner cylinder bottomed part 210 are arranged so as to face each other with a gap, the gas 53 sent from the air blowing hole 13 is separated from the outer cylinder bottomed part 110. The distance from the inner cylinder bottomed portion 210 is entered. The gas 53 passes through the surface of the inner tube bottomed portion 210 facing the bottomed portion 110 of the outer tube and turns the gas guide portion 26 in the gap 26a in a spiral air guide so as to turn on the inner peripheral side surface 12 of the outer tube. It turns reliably along the part 240 and is guided to the mixing part 27.
With the buoyancy of the gas 53, the fluid 51 is drawn into the inner cylinder 20 from the fluid drawing port 211. Then, the fluid 51 passes through the fluid guide portion 25 and is discharged from the fluid discharge portion 28 and guided to the mixing portion 27 along with the rising force due to the buoyancy of the gas 53.
In the mixing unit 27, the gas 53 and the fluid 51 are mixed and stirred. At that time, the gas 53 swirls on the inner peripheral side surface 12 of the outer cylinder, and the gas 53 hits the protrusion 15 formed on the inner peripheral side surface 12 of the outer cylinder, so that the gas 53 is finely crushed. Then, the fluid 51 and the gas 53 are further easily mixed. This is the same as in the first embodiment described above. Then, the fluid 51 and the gas 53 are mixed in the mixing unit 27, become a swirl vortex 54, discharged from the mixed liquid discharge unit 19 that is the opening 18 of the outer cylinder 11, and becomes a convection 55, thereby forming the water tank 56. Is the same as in the first embodiment.
Therefore, similarly to the first embodiment, according to the gas-liquid mixing and circulation device 100 of the second embodiment, the force to draw the fluid 51 is strong, and is disturbed when the gas 53 is guided to the mixing unit 27. Therefore, even a fluid 51 such as water containing solids or the like can be drawn into the gas-liquid mixing and circulation device 100 and mixed with the gas 53 and stirred. .

(Third embodiment)
FIG. 10 is a schematic perspective view in which a part of the gas-liquid mixing and circulating apparatus 10a according to the third embodiment is cut out for explanation, and is a schematic explanatory diagram for explaining a use state. In addition, in FIG. 10, the points where the fluid 51, the gas 53, the mixed flow 57, and the like are indicated by arrows are the same as in the first embodiment. That is, the fluid 51, the gas 53, the mixed flow 57, and the like are not necessarily in this manner, and are schematically illustrated separately for convenience in order to easily understand the flow and the like.
Since the third embodiment is identical in many configurations to the first embodiment, the same configurations are denoted by the same reference numerals, description thereof is omitted, and differences will be mainly described.
The materials of the outer cylinder 11 and the inner cylinder 200 and the materials of the support portion 14, the support base 16, the air blowing holes 13, and the like are the same as those in the first embodiment. The protrusion 15 is the same as that in the first embodiment.

The difference from the first embodiment is that a spiral air guide portion is not provided on the inner cylinder outer peripheral surface 23 of the inner cylinder 200 according to the third embodiment.
Other configurations are the same as those of the first embodiment.
For this reason, as shown in FIG. 10, in the gas-liquid mixing and circulating apparatus 10 a, when the gas 53 is sent from the air blowing hole 13, the gas 53 passes through the gap 26 a between the inner cylinder 200 and the outer cylinder 11.
At this time, since the spiral air guide portion is not provided on the inner cylinder outer peripheral side surface 23 of the inner cylinder 200, the gas 53 passing through the gap 26 a and the gas 53 sent from the air blowing hole 13 and the gas 53 Due to the buoyancy and the like, the air passes through the gap 26a between the outer peripheral side surface 23 of the inner cylinder and the inner peripheral side surface 12 of the outer cylinder and rises to the Z2 side. That is, the gas 53 passes through the gap 26 a that is the gas guiding portion 26 and is released to the mixing portion 27 side.

Then, along with the ascending force due to the buoyancy of the gas 53, the fluid 51 is guided from the fluid inlet 21 which is the inner cylinder lower opening 21a to the fluid guiding part 25 which is the hole 25a at the center of the inner cylinder 200. Is done. The fluid 51 is sent from the fluid discharge unit 28 to the mixing unit 27.
Then, in the mixing unit 27, the gas 53 and the fluid 51 that have been fed in are mixed and discharged upward from the mixing and discharging unit 19. At this time, the gas 53 sent to the mixing unit 27 hits the plurality of protrusions 15 of the mixing unit 27, and the gas 53 is crushed and becomes finer. Then, the fluid 51 that has been drawn in by the ascending force of the buoyancy of the gas 53 is guided to the mixing unit 27, stirred and mixed with the gas 51 that has been made fine, and becomes a mixed flow 57. It rises toward the part 18 and is discharged.

Thus, the hole portion 25a of the inner cylinder 200 is a passage for the fluid 51, and a large amount of the fluid 51 can be drawn. The gas 53 passes through the gap 26 a between the inner cylinder 200 and the outer cylinder 11, enters the mixing portion 27 formed in a portion of the outer cylinder 11 where the inner cylinder 200 is not disposed inside, and enters the fluid 51. Stir and mix. Therefore, since there is no place that blocks the passage of the gas 53, the buoyancy of the gas 53 is not disturbed.
Therefore, a large amount of the fluid 51 and the gas 53 are drawn into the mixing unit 27, and the mixing and stirring efficiency of the gas 53 and the fluid 51 is increased. Since the hole 25a of the inner cylinder 200 can draw a large amount of fluid 51, the circulation is not delayed. Therefore, similarly to the first embodiment, according to the gas-liquid mixing and circulating apparatus 10a of the third embodiment, the force to draw the fluid 51 is strong, and is disturbed when the gas 53 is guided to the mixing unit 27. Therefore, even a fluid 51 such as water containing solids or the like can be drawn in a large amount into the gas-liquid mixing / circulation device 10a, and mixed and stirred with the gas 53. .

(Fourth embodiment)
FIG. 11 is a schematic perspective view in which a part of the gas-liquid mixing and circulating apparatus 100a according to the fourth embodiment is cut out for explanation, and is a schematic explanatory diagram for explaining a use state. In addition, in FIG. 11, the points where the fluid 51, the gas 53, the mixed flow 57, and the like are indicated by arrows are the same as in the first embodiment. That is, the fluid 51, the gas 53, the mixed flow 57, and the like are not necessarily in this manner, and are schematically illustrated separately for convenience in order to easily understand the flow and the like.
In the fourth embodiment, since many configurations thereof are the same as those in the first embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and differences will be mainly described.
The materials of the outer cylinder 11 and the inner cylinder 200 and the materials of the support portion 14, the support base 16, the air blowing holes 13, and the like are the same as those in the first embodiment.

  And the inner cylinder 200 of 4th Embodiment is the same as that of 3rd Embodiment. The difference from the first embodiment or the third embodiment is that the shape of the plurality of protrusions 15 a provided on the outer cylinder inner peripheral surface 12 of the mixing part 27 of the outer cylinder 11 is the other configuration. This is the same as the first embodiment or the third embodiment.

  The shape of the protruding portion 15a is different from that of the other embodiments, and the outer shape is a slightly sharp tapered shape on the upper side, and a slightly wider circular shape on the lower side, and has a droplet shape. ing. The protruding portion 15a is a line that passes through the top end of the upper tapered shape and the top end portion of the lower circular shape, and has a substantially symmetrical shape on the left and right, and a convex shape that forms a gradient toward the line. It has become. In other words, the protrusion 15 a has a drop-shaped surface in contact with the inner peripheral surface 12 of the outer cylinder, and has a mountain shape from the installation surface with the inner peripheral surface 12 of the outer cylinder toward the core of the outer cylinder 11. It has a shape.

  For this reason, as shown in FIG. 11, the gas 53 that has risen to the Z2 side that has passed through the gap 26a is released to the mixing unit 27 side, for example, as indicated by the arrow in the schematic diagram, and this As the gas 53 rises due to the buoyancy, the fluid 51 that is guided from the fluid inlet 21 to the fluid guiding portion 25 is sent to the mixing portion 27 side, for example, as indicated by arrows in the schematic diagram. Here, similarly to the third embodiment, since the spiral air guide portion is not provided on the inner cylinder outer peripheral side surface 23 of the inner cylinder 200, the gas 53 passing through the gap 26 a passes through the air blowing hole 13. Due to the air flow at the time of sending, the buoyancy of the gas 53, etc., it passes through the gap 26a between the inner cylinder outer peripheral side surface 23 and the outer cylinder inner peripheral side surface 12, and rises to the Z2 side.

In the mixing unit 27, the gas 53 and the fluid 51 that have been fed in are mixed and discharged upward from the mixing and discharging unit 19.
When the gas 53 sent into the mixing unit 27 hits the plurality of projections 15a of the mixing unit 27, the gas 53 is crushed and becomes finer, and rises along the projections 15a.
At this time, since the shape of the protruding portion 15a is a drop shape, the gas 53 is first crushed into a slightly wide circular shape on the lower side and rises along the left and right outer peripheral surfaces of the protruding portion 15a. Is done. Then, the gas 53 that has turned from the left and right with a slightly acute tapered shape on the upper side further hits the next protrusion 15a, and the bubbles of the gas 53 are crushed and become finer.
Since the shape of the protruding portion 15a is a drop shape, the gas 53 can be efficiently crushed and formed into fine bubbles, so that the gas 53 is efficiently mixed with the fluid 51 and efficiently taken into the fluid 51. become.
Then, the fluid 51 that has been drawn in by the ascending force of the buoyancy of the gas 53 is guided to the mixing unit 27, stirred and mixed with the gas 51 that has been made fine, and becomes a mixed flow 57. It rises toward the part 18 and is discharged.

Thus, the hole portion 25a of the inner cylinder 200 is a passage for the fluid 51, and a large amount of the fluid 51 can be drawn. The gas 53 passes through the gap 26 a between the inner cylinder 200 and the outer cylinder 11, enters the mixing portion 27 formed in a portion of the outer cylinder 11 where the inner cylinder 200 is not disposed inside, and enters the fluid 51. Stir and mix. Therefore, since there is no place that blocks the passage of the gas 53, the buoyancy of the gas 53 is not disturbed. Therefore, a large amount of the fluid 51 and the gas 53 are drawn into the mixing unit 27, and the mixing and stirring efficiency of the gas 53 and the fluid 51 is increased. And since the hole part 25a of the inner cylinder 200 can draw in a lot of fluid 51, circulation does not stagnate.
Therefore, similarly to the first embodiment, according to the gas-liquid mixing and circulating apparatus 100a of the fourth embodiment, the force to draw the fluid 51 is strong, and the protrusion is formed when the gas 53 is guided to the mixing unit 27. By 15a, it can be efficiently crushed, fined and made into small bubbles. And when drawing the fluid 51 into the hole 25a of the inner cylinder 200, it is not disturbed. Therefore, even if the fluid 51 is water or the like containing solids or the like, the gas-liquid mixing and circulating device 10a. It is possible to mix and agitate with the gas 53 by being drawn in a large amount.

  By the way, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the claims. In addition, a part of each configuration of the above embodiment may be omitted, or may be arbitrarily combined so as to be different from the above.

It is the schematic perspective view which notched a part of gas-liquid mixing circulation apparatus concerning a 1st embodiment. It is a schematic perspective view which shows the inner cylinder of the gas-liquid mixing circulation apparatus which concerns on 1st Embodiment. It is a schematic front view from the X1 direction of the schematic perspective view of FIG. It is a schematic front view from the X2 direction of FIG. It is a schematic top view from the Z1 direction of FIG. It is a schematic explanatory drawing for demonstrating the state of the gas and fluid in the operation state of the gas-liquid mixing circulation apparatus which concerns on 1st Embodiment. It is a schematic end view for demonstrating the state which has installed and operated the gas-liquid mixing and circulation apparatus which concerns on 1st Embodiment in the water tank. It is the schematic perspective view which notched some gas-liquid mixing circulation apparatuses which concern on 2nd Embodiment. It is a schematic explanatory drawing for demonstrating the state of the gas and fluid in the operation state of the gas-liquid mixing circulation apparatus which concerns on 2nd Embodiment. It is a schematic explanatory drawing for demonstrating the state of the gas and fluid in the operation state of the gas-liquid mixing circulation apparatus which concerns on 3rd Embodiment. It is a schematic explanatory drawing for demonstrating the state of the gas and fluid in the operation state of the gas-liquid mixing circulation apparatus which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,10a, 100,100a ... Gas-liquid mixing circulation apparatus 11 ... Outer cylinder 12 ... Outer cylinder inner peripheral side surface 13 ... Air ventilation hole 14 ... Support part 15, 15a ... Protrusion Part 16: Supporting base 17 ... Connecting part 18 ... Opening part 19 ... Mixed liquid discharge part 20, 200 ... Inner cylinder 21, 211 ... Fluid inlet 21a ... Inner cylinder Lower opening 22 ... Inner cylinder inner peripheral surface 23 ... Inner cylinder outer peripheral side 24, 240a ... Spiral air guide 25 ... Fluid guide 25a, 250a ... Hole 26 ..Gas induction part 26a ... Gap 27 ... Mixing part 28 ... Fluid discharge part 28a ... Upper side opening of inner cylinder 110 ... Bottom part of outer cylinder 210 ... Bottom part of inner cylinder 212.・ ・ Fluid draw-in part 51 ... Fluid 52 ... Piping 53 ... Gas 54 ... Rotation Swirl 55 ... Convection 56 ... Water tank 57 ... Mixed flow

Claims (3)

A gas-liquid mixing and circulation device for mixing and circulating a gas in a fluid,
An inner cylinder having a hole at the center thereof, and an outer cylinder arranged with a gap between the outer peripheral side surface of the inner cylinder, and
The gap between the inner circumferential surface of the outer cylinder and the outer circumferential surface of said inner cylinder, a gas guide portion for guiding the gas,
The hole portion of the inner cylinder is a fluid guiding portion that guides the fluid without arranging an object that obstructs the flow of the fluid,
The length of the inner cylinder in the longitudinal direction is shorter than the length of the outer cylinder in the longitudinal direction, and the gas and the fluid are mixed in a portion of the outer cylinder where the inner cylinder is not disposed inside. A mixing part is formed,
The gas and the fluid mixed in the mixing part are adapted to come out from one end of the outer cylinder ,
A plurality of protrusions are disposed on the inner peripheral side surface of the outer cylinder in the mixing unit,
The gas-liquid mixing and circulation device according to claim 1, wherein when the protrusion is directly opposed to the inner peripheral side surface, the protrusion has a drop shape with a tapered shape on the downstream side and a circular shape on the upstream side . Both ends of the inner cylinder and the outer cylinder are opened, and one end side of the inner cylinder and one end side of the outer cylinder are arranged in substantially the same plane, and are arranged in the substantially same plane. The gap between the inner cylinder and the outer cylinder on the one end side is connected, and the fluid is guided to the hole of the inner cylinder from the one end side of the inner cylinder arranged in the substantially same plane. The gas-liquid mixing and circulating apparatus according to claim 1, wherein the gas-liquid mixing and circulating apparatus is configured as described above. The other end of the outer cylinder is an outer cylinder bottomed part, and the inner cylinder has one end of an inner cylinder bottomed part, and the outer cylinder bottomed part and the inner cylinder bottomed part are: It is arranged to face each other with an interval,
  A gas introduction part for introducing the gas is disposed in the vicinity of the bottomed part of the outer cylinder,
  A fluid introduction part for introducing the fluid is arranged in the vicinity of the inner cylinder bottomed part,
  The gas introduced from the gas introduction part passes through the opposing surface side of the bottomed part with the outer cylinder and the bottomed part with the inner cylinder, and is guided to the gas guiding part.
  The gas-liquid mixing and circulating apparatus according to claim 1.

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