JP2002059186A - Water-jet type fine bubble generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-jet type fine bubble generator which generates a large quantity of fine bubbles in a wide range together with a water current in water of a water tank, a pool, an aeration tank, a river, or the like, in water (seawater) of a culture pond, a nursery on the coast, or a fresh fish carrier, or in liquid of a gas-liquid reaction tank in a chemical factory. SOLUTION: This generator is provided with a fine bubble generator, an introducing pipe which has the lower side connected to an introducing hole, and a water current pipe which is connected to a prescribed part of the introducing pipe and has the lower side opened. The fine bubble generator has a generator body having a hollow part converging from the rear side toward the front end part on the inside, the introducing hole which is arranged on the rear side of the generator body in the tangential direction, and a gasliquid spray nozzle arranged in the front end part of the generator body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a water tank, pool, aeration tank, water (seawater) of aquaculture ponds, coastal aquaculture farms or fresh fish carriers, or a gas-liquid reaction tank in a chemical factory. The present invention relates to a water flow type fine bubble generator which generates a large amount of fine bubbles in a liquid phase and diffuses the bubbles by a water flow.

[0002]

2. Description of the Related Art In recent years, various micro-bubble generators have been researched and developed to purify water tanks, pools, rivers, etc., increase dissolved oxygen, and obtain a high massage effect in bathtubs by generating micro-bubbles. Have been. As a conventional microbubble generator, for example, JP-A-2000-4747 (hereinafter referred to as “A”) discloses “a container body having a conical space and a part of the inner wall circumferential surface of the space. It is composed of a pressurized liquid inlet port opened in the tangential direction, a gas inlet port opened at the bottom of the conical space, and a swirling gas-liquid outlet port opened at the top of the conical space. A revolving microbubble generator is disclosed. For example, Japanese Utility Model Laid-Open No. 63-74123 (hereinafter referred to as “B”) discloses that “a liquid supply hole of a jet pump for sending gas by a liquid jet is tangentially formed along a peripheral wall of an inlet of a nozzle, A suction massage bubble jet device in which a mixing chamber is connected to an outlet of a nozzle, the outlet is used as an injection port, and a plurality of cylindrical projections are provided around the mixing chamber is disclosed.

[0003]

However, the above-mentioned prior art has the following problems. (1) The techniques described in the publications A and B do not have a configuration for generating a water flow, and thus have a problem that fine bubbles cannot be diffused in a desired direction over a wide range. Was.

[0004] The present invention solves the above-mentioned conventional problems, and is used in water (seawater) of water tanks, pools, aeration tanks, rivers and the like, or in aquaculture ponds, coastal farms or fresh fish carriers, or in chemical plants. It is an object of the present invention to provide a water flow type fine bubble generator capable of generating a large amount of fine bubbles in a liquid in a gas-liquid reaction tank together with a water flow in a large amount and in a wide range.

[0005]

Means for Solving the Problems In order to solve the above problems, a water flow type microbubble generator of the present invention has the following configuration.

A water flow type microbubble generator according to claim 1 of the present invention comprises: a. A container having a hollow portion having a shape converging from the rear side toward the front end, an introduction hole disposed tangentially on the rear side of the container, and a front end of the container. A micro-bubble generator having a gas-liquid orifice; b. An introduction pipe whose downstream side is connected to the introduction hole,
c. A water flow pipe connected to a predetermined portion of the introduction pipe and having an open downstream side.

With this configuration, the following operation is obtained. (1) When a high-pressure gas-liquid mixed fluid flows into the housing from the introduction pipe, the gas-liquid mixed fluid flowing into the housing from the tangential direction turns along the inner wall surface of the housing and is violently mixed. While moving toward the gas-liquid orifice side. At this time, due to the difference in specific gravity between the liquid and the gas, a centrifugal force acts on the liquid, a centripetal force acts on the gas, and the gas is focused on the central axis to form a negative pressure axis. In addition, a force that tries to enter the microbubble generator acts on the liquid-phase liquid near the gas-liquid ejection hole due to the negative pressure axis (hereinafter, the liquid on which this force acts is referred to as a negative pressure liquid). On the other hand, as the gas-liquid mixed fluid in the microbubble generator approaches the gas-liquid orifice while swirling, the swirling speed increases and the pressure increases, and the swirling speed and pressure become maximum near the gas-liquid orifice, It comes into a state of pressing against the negative pressure liquid. The gas collected on the negative pressure axis passes through the gap formed by the negative pressure liquid and the swirling gas-liquid mixed fluid as compressed gas while being sheared, and as a large amount of fine bubbles along with the gas-liquid mixed fluid. It is ejected from the liquid ejection hole into the liquid phase. (2) The gas collected on the negative pressure axis is compressed / sheared by the gas-liquid mixed fluid and the negative pressure liquid ejected while rotating, and is ejected so as to be torn off. Of fine bubbles can be generated. (3) The gas-liquid mixed fluid that has flowed into the water flow pipe from the introduction pipe flows into the liquid phase and forms a water flow. The microbubbles are diffused over a wide area along the water flow. (4) It is not necessary to separately provide a pump for generating microbubbles and a pump for generating water flow, and a single pump can generate microbubbles and a water flow, so that productivity is excellent and maintenance is excellent. (5) Since a large amount of fine bubbles are generated, the contact area between the gas and the liquid can be increased, and the reaction in the gas-liquid reaction device and the purification in the purification device can be promoted. In addition, the amount of dissolved oxygen in the water (seawater) of the culture pond, the farm, or the live fish transport vehicle can be increased.

Here, as the body, a conical shape, a truncated conical shape, a hemispherical shape, a shell shape or the like is used. When a conical or frustoconical vessel is used, the vessel has a shape that converges from the introduction hole to the gas-liquid ejection hole at a stretch, so a sharp shearing force is applied to the fluid circling inside the vessel. Working,
Even a fluid having a high viscosity can be sufficiently stirred. In addition, the shape of the gas-liquid vent is polygonal or circular, such as triangle or square,
An oval shape is used. When it is made circular, uniform fine bubbles can be obtained. The particle size of the gas bubbles ejected from the gas-liquid ejection holes and the flow velocity of the fluid ejected from the water flow tube are appropriately selected according to the ratio of the diameters of the introduction tube and the water flow tube and the swirling speed based on the shape of the vessel. As the shape of the water flow pipe, a simple tubular shape, a shape whose inner diameter gradually decreases toward the downstream side, or the like is used. In addition, the water flow pipe is disposed with its downstream end directed in the direction in which the fine bubbles are to be diffused. The split ratio of the gas-liquid mixed fluid between the inlet pipe and the water pipe depends on the pressure and flow rate of the fluid introduced into the inlet pipe, but the split ratio on the water pipe side is 5 to 5.
It is diverted in the range of 80%. When the flow ratio is less than 5%, the flow rate of the flow branch tube is weak, the diffusion range of the fine bubbles is narrow, and when it exceeds 80%, the generation amount of the fine bubbles tends to decrease, which is not preferable. The diameter ratio between the introduction hole and the gas-liquid ejection hole is appropriately selected depending on the pressure and flow velocity of the introduction fluid in the introduction pipe. However, when the generation amount and diffusion range of fine bubbles are large, the diameter of the introduction hole is set to the gas-liquid ejection hole. Larger than the caliber.

The second aspect of the present invention is the first aspect.
The water flow type microbubble generator according to the above, wherein the microbubble generator has a hollow body having a shape that converges from an intermediate portion toward both ends, and the intermediate portion of the container. A configuration comprising: an introduction pipe which is provided in a tangential direction and has an introduction hole which opens in the container, and a gas-liquid ejection hole which is drilled at a position substantially symmetrical with respect to the introduction pipe of the container. Have.

With this configuration, in addition to the function of claim 1,
The following operation is obtained. (1) Since the gas-liquid ejection holes are formed substantially symmetrically with respect to the introduction pipe of the container, a large amount of fine bubbles can be diffused from both sides of the container over a wider range. (2) Since two gas-liquid ejection holes are provided, it is possible to easily adjust the particle diameter of the fine bubbles. (3) The generation rate of fine bubbles can be significantly increased. Here, as the vessel, a shape in which the bottom surfaces of a cone or a truncated cone communicate with each other, a spherical shape, an egg shape, or the like is used. When a vessel having a shape in which the bottoms of a cone or a truncated cone are connected to each other is used, the fluid that swirls inside the vessel because the vessel has a shape that converges from the introduction hole toward the gas-liquid ejection hole at once. A sharp shearing force acts on the fluid, and even a fluid having a high viscosity can be sufficiently stirred. Further, the amount of air bubbles ejected from the gas-liquid ejection holes and the flow velocity of the fluid ejected from the water flow pipe are appropriately selected according to the ratio of the pipe diameters of the introduction pipe and the water flow pipe and the swirling speed based on the shape of the vessel.

The third aspect of the present invention is the first aspect.
The gas self-priming hole formed in the rear end or rear wall of the micro-bubble generator, one end is connected to the gas self-priming hole and the other end is open. And a self-priming gas tube.

With this configuration, in addition to the function of the first aspect,
The following operation is obtained. (1) Even if only a liquid, not a gas-liquid mixed fluid, flows into the container from the inlet pipe, the liquid flowing into the container from the tangential direction acts on the liquid by centrifugal force, so that the central portion becomes negative pressure and the central portion becomes negative pressure. The gas flows from the gas self-priming tube to form a negative pressure axis. (2) The gas self-priming tube is opened to the atmosphere, or a target absorption or reaction gas (for example, CO ₂ , HCl, HCN, SO
₂ , COCl ₂ , fluorine compound gas or other reaction gas), the gas can be absorbed or reacted with the liquid.

Here, the amount of gas suction into the pump is set outside the range in which cavitation of the pump occurs. Further, it is preferable that the gas is sucked in at a lower viscosity of the liquid because the gas can be more diffused. In addition, the water flow type microbubble generator is used for purification of water purification plants and rivers, purification of livestock urine, supply of oxygen during transportation of live fish and cultivation, increase in dissolved oxygen during hydroponic cultivation, and pollution caused by floating of sludge. Water treatment, removal of decals in water tanks, sterilization by ozone mixing, sterilization,
It is used for deodorization, promotion of blood circulation during bathing, washing machine, promotion of fermentation and culture of fermented foods, dissolution and neutralization by high-density contact of various chemicals and various gases, face washer, shower, fuel injector and the like. In particular, by installing a water flow type microbubble generator in the water tank for transporting live fish and generating water flow while supplying oxygen into the water tank, it is possible to delay the weakening of live fish, making it possible to transport for a long time . By appropriately selecting the inner diameter of the gas self-priming hole, the inner diameter of the gas self-priming tube, and the discharge pressure of the pump, the amount of bubbles to be ejected is determined. When the gas self-priming tube is connected to a gas tank having a pressure of a reaction gas or the like, the pressure is preferably set lower than the pressure of the fluid in the introduction tube. This is because it is difficult to miniaturize the gas. When a flow meter or a flow regulator is installed in the gas self-priming pipe, not only can the amount of ejected fine bubbles be adjusted freely, but also the particle size of the fine bubbles can be adjusted. It is preferable to be provided depending on the location.

The invention described in claim 4 of the present invention is claim 1.
4. The water flow type microbubble generator according to any one of Items 3 to 3, further comprising a water flow generation nozzle disposed downstream of the water flow pipe.

According to this configuration, the following operation can be obtained in addition to the operation of any one of the first to third aspects. (1) Since the water flow generation nozzle is extended, the flow velocity of the liquid or the gas-liquid mixed fluid flowing out of the water flow pipe can be increased, and the fine bubbles can be diffused over a wider range. (2) The liquid phase can be mixed and agitated, and the dissolution spot of gas can be suppressed.

Here, as the water flow generating nozzle, a tapered nozzle or a nozzle which takes in gas as an accompanying flow is used. When a tapered nozzle is used, fine bubbles can be transported to a distant place. In addition, when a gas that takes in a gas as an accompanying flow is used, a mixing and stirring effect of a liquid phase can be obtained.

According to a fifth aspect of the present invention, there is provided a water flow type fine bubble generator according to any one of the first, second and fourth aspects, wherein the apparatus has a suction port and a discharge port. A pump in which the upstream side of the introduction pipe is connected to the discharge port, a suction pipe in which the downstream side is connected to the suction port of the pump, and one end connected to a predetermined portion of the suction pipe and the other end opened in gas. And a gas self-priming tube.

According to this configuration, the following operation is obtained in addition to the operation of any one of the first, second, and fourth aspects. (1) When the pump is driven, gas is sucked from the gas self-priming pipe into the suction pipe as an accompanying flow of the fluid flowing through the suction pipe, and flows into the body as a gas-liquid mixed fluid. (2) Since the gas sucked from the gas self-priming pipe is diffused to some extent by the impeller in the pump and then flows into the container, finer bubbles can be generated. (3) It is not necessary to separately provide a pump for generating microbubbles and a pump for generating water flow, and a single pump can generate microbubbles and a water flow, so that productivity and maintenance are excellent. (4) Since gas flows not only into the fine bubble generator but also into the water flow tube, it is possible to blow out fine bubbles blown out from the fine bubble generator and large bubbles blown out from the water flow tube. The large bubbles float relatively quickly after being ejected from the water flow tube, and the fine bubbles float after traveling a longer distance than the large bubbles after being ejected. Therefore, large bubbles can be diffused near the microbubble generator and fine bubbles can be diffused far away.

Here, by changing the diameter of the suction pipe and the capacity of the pump, the flow rate of the liquid flowing in the suction pipe changes, so that the amount of gas sucked into the suction pipe can be changed. Further, the amount of gas suctioned into the pump is set outside the range in which cavitation of the pump occurs. When the flow regulator or the flow meter is provided in the gas self-priming pipe, the above-described effects can be obtained.

The invention described in claim 6 of the present invention is claim 3.
Or the water flow type microbubble generator according to 4, wherein a pump having a suction port and a discharge port, wherein the upstream side of the introduction pipe is connected to the discharge port, and the downstream side is connected to the suction port of the pump. And a suction pipe provided.

According to this configuration, the following operation is obtained in addition to the operation of the third or fourth aspect. (1) When the pump is driven, the fluid flows from the suction pipe through the pump to the introduction pipe or the water flow pipe. (2) It is not necessary to separately provide a pump for generating microbubbles and a pump for generating water flow, and a single pump can generate microbubbles and a water flow, so that productivity is excellent and maintenance is excellent. (3) Since air or reactive gas is not sucked into the impeller or casing of the pump, it is possible to prevent the pump from cavitation. (4) Since active reaction gas (for example, HCl, a fluorine compound, COCl _2, etc.) does not enter the casing of the pump, the durability of the pump can be improved. (5) The selection of the pump can be made only by the type of the liquid, which is excellent in versatility. (6) When the microbubble generator and the suction tube are put in the same liquid phase, the gas dissolution rate can be significantly increased, and the liquid phase can be stirred to significantly increase the gas absorption efficiency and the reaction rate.

[0022]

(Embodiment 1) A water flow type microbubble generator according to Embodiment 1 of the present invention will be described below with reference to the drawings.

FIG. 1 is a state diagram showing a state in which the water-flow type microbubble generator according to Embodiment 1 of the present invention is installed in a fish cage. In FIG. 1, 1 is a water flow type microbubble generator according to Embodiment 1 of the present invention, 2 is a pump having a suction port 2a and a discharge port 2b, and 3 is an inlet pipe whose upstream side is connected to a discharge port 2b of the pump 2. Reference numeral 4 denotes a microbubble generator connected to the downstream side of the introduction pipe 3, 5 denotes a water flow pipe whose upstream side is branched at a predetermined portion of the introduction pipe 3, and 6 denotes a gas self-suction hole 6 for water flow.
a, a water flow generation nozzle connected to the downstream side of the water flow pipe 5;
A water flow gas self-priming pipe having one end connected to the water flow gas self-priming hole 6b of the water flow generation nozzle 6 and the other end opened in the atmosphere;
Reference numeral 8 denotes a suction pipe whose downstream side is connected to the suction port 2 a of the pump 2, 9 denotes a strainer disposed upstream of the suction pipe 8,
Reference numeral 0 denotes a gas self-priming pipe having one end branched and connected to a predetermined portion of the suction pipe 8 and the other end open to the atmosphere, 10a denotes a gas flow regulator disposed at a predetermined portion of the gas self-priming pipe 10, and 11 denotes a gas flow regulator. It is a liquid phase of a water tank in which the microbubble generator 1 is provided, a fish cage 11a, or the like.

FIG. 2A is a perspective view of a main part of the microbubble generator according to the first embodiment of the present invention, FIG. 2B is a front view thereof, and FIG. 2C is a main part thereof. It is a side view.
In FIG. 2, 3 is an introduction pipe, 4 is a fine bubble generator, 4a
Is a vessel having a hollow portion (in a substantially hollow spherical shape) whose inside converges from an intermediate portion toward both ends, 4b is an introduction hole of the introduction pipe 3 opened tangentially to the vessel 4a, and 4c is a vessel. 4a
Is a gas-liquid ejection hole formed at both ends in a diameter direction orthogonal to a straight line from the introduction hole 4b toward the center and the center.

FIG. 3 is a side sectional view showing an example of the water flow generating nozzle according to the first embodiment of the present invention. In FIG. 3, 5 is a water flow pipe, 6 is a water flow generation nozzle, and 7 is a water flow gas self-priming tube. These are the same as those in FIG. 6a is a water flow body for accelerating the fluid flowing from the rear and discharging from the front,
Reference numeral b denotes a water flow suction pipe which is disposed and fixed to the rear end of the water flow vessel 6a and has a shape whose opening area is gradually narrowed toward the front side. The downstream end of the water flow pipe 5 is connected to the water suction pipe 6b. Reference numeral 6c denotes a water flow gas self-suction hole formed in a side wall of the water flow device 6a, and reference numeral 6d denotes a water flow ejection hole formed substantially coaxially with the water flow suction pipe 6b at the front end of the water flow device 6a. is there. The fluid flowing from the water flow pipe 5 to the water flow generation nozzle 6 passes through the water flow suction pipe 6b while accelerating, flows into the water flow body 6a, and is ejected from the water flow discharge hole 6d.
As an accompanying flow of this fluid, air flows from the water flow gas self-priming pipe 7 through the water flow gas self-priming hole 6c into the water flow body 6a, and flows from the water flow discharge hole 6d together with the fluid from the water flow suction pipe 6b. It is gushing.

The operation of the water flow type microbubble generator according to the first embodiment of the present invention having the above-described configuration will be described below with reference to the drawings. FIG. 4 is a main part front view showing the state of the fluid inside the fine bubble generator according to Embodiment 1 of the present invention. In FIG. 4, 3 is an introduction tube, 4 is a fine bubble generator, 4a is a body, 4b is an introduction hole,
Reference numeral 4c denotes gas-liquid ejection holes, which are the same as those shown in FIG. 2 and are denoted by the same reference numerals and description thereof is omitted. X is a negative pressure axis formed by the specific gravity difference between the gas and the liquid of the gas-liquid mixed fluid circling in the fine bubble generator 4. In FIG. 1, when the pump 2 is driven, the liquid in the liquid phase 11 flows into the suction pipe 8 via the strainer 9. At the connection between the suction pipe 8 and the gas self-priming pipe 10, air is sucked into the suction pipe 8 from the gas self-priming pipe 10 as an accompanying flow of liquid, becomes a gas-liquid mixed fluid, and flows from the suction port 2 a of the pump 2 into the pump 2. Sucked into. The gas-liquid mixed fluid sucked into the pump 2 is discharged from the discharge port 2b of the pump 2 into the introduction pipe 3 by the impeller (not shown) of the pump 2 while bubbles are diffused. The gas-liquid mixed fluid that has flowed into the introduction pipe 3 branches out to the fine bubble generator 4 and the water flow pipe 5 and flows out.

In FIG. 4, the high-pressure gas-liquid mixed fluid flowing into the fine bubble generator 4 from the introduction pipe 3 through the introduction hole 4b from the tangential direction and vibrates along the inner wall surface of the body 4a. The gas-liquid mixture moves toward the gas-liquid ejection hole 4c while being mixed. At this time, due to the difference in specific gravity between the liquid and the gas, centrifugal force acts on the liquid, centripetal force acts on the air,
A negative pressure axis X composed of the depressurized air phase is formed. Further, due to the negative pressure axis X, the liquid in the liquid phase 11 near the gas-liquid ejection hole 4c has a force acting to enter the fine bubble generator 4 (hereinafter, the liquid on which this force acts is referred to as a negative pressure liquid). ). On the other hand, as the gas-liquid mixed fluid in the fine bubble generator 4 approaches the gas-liquid ejection hole 4c while swirling, the swirling speed increases, the swirling speed becomes maximum near the gas-liquid ejection hole 4c, and the negative pressure liquid and It becomes a state of pushing. Therefore, the gas collected on the negative pressure axis X passes between the negative pressure liquid and the swirling gas-liquid mixed fluid while being compressed and sheared, and a large amount of gas flows along the spherical surface of the fine bubble generator 4. The gas bubbles are ejected from the gas-liquid ejection holes 4c to the liquid phase 11 as fine bubbles of the order of nanometers to micrometers.

On the other hand, in FIG. 3, the gas-liquid mixed fluid that has flowed into the water flow pipe 5 is accelerated by the water flow generation nozzle 6 and jetted into the liquid phase 11. As a result, a water flow is generated in the liquid phase 11, and the fine bubbles ejected from the gas-liquid ejection holes 4c of the fine bubble generator 4 are carried to the water flow to a far distance and diffused over a wide range.

In the first embodiment, the spherical microbubble generator 4 having two gas-liquid ejection holes 4c is used. However, one gas-liquid ejection hole has a hemispherical shape and a shell-shaped shape. The present invention can be similarly implemented by using a fine bubble generator having a truncated conical shape or a conical shape. In the first embodiment, the gas is introduced into the water flow generation nozzle 6 by using the water flow generation nozzle 6 having the water flow gas self-priming hole 6c. However, the gas is simply directed from the rear side to the front side. Even if a pipe whose inner diameter gradually becomes smaller is connected, the fluid from the water flow pipe 5 can be accelerated, so that the present invention can be similarly implemented. In some cases, the fluid may directly flow into the liquid phase 11 from the water flow pipe 5 without using the water flow generation nozzle 6, but even in this case, the inner diameter of the downstream end of the water flow pipe 5 is made smaller than that of the upstream side. By performing the processing, the fluid can be accelerated and diffused over a wide range to a distant place. In the first embodiment, the fish cage has been described. However, various facilities and apparatuses such as a septic tank, a sedimentation tank, a chemical reaction device, and an aeration tank can be similarly implemented.

According to the water-flow type microbubble generator of the first embodiment of the present invention configured as described above, the following operations can be obtained. (1) The gas introduction hole 4 is provided in the body 4a of the fine bubble generator 4.
gas-liquid orifice 4 at the center line of the symmetrical position on both sides about b
c, the microbubbles are generated by the microbubble generator 1
Can erupt widely from both sides. (2) When the gas collected on the negative pressure axis X is blown out, it is sheared while being compressed by the negative pressure liquid, so that finer and more bubbles can be blown out. (3) The gas sucked from the gas self-priming pipe 10 is diffused to some extent by the impeller in the pump 2 and then the vessel 4
Since it flows into a, finer bubbles can be generated. (4) The gas-liquid mixed fluid that has flowed into the water flow pipe 5 from the introduction pipe 3 is injected into the liquid phase, and forms a water flow in the liquid phase. With this water flow, the fine bubbles ejected from the gas-liquid ejection holes 4c of the fine bubble generator 4 are diffused over a wide range. (5) Since the water flow generating nozzle 6 extends downstream of the water flow pipe 5, the water flow of the liquid or the gas-liquid mixed fluid flowing out of the water flow pipe 5 can be energized, and fine bubbles can be generated in a wider range. It can be spread far away. (6) It is not necessary to separately provide a pump for generating microbubbles and a pump for generating a water flow, and a single pump 2 can generate microbubbles and a water flow, so that productivity is excellent and maintenance is excellent. . (7) The fluid ejected from the water flow generation nozzle 6 contains bubbles larger than the fine bubbles ejected from the microbubble generator 4, and these bubbles are not diffused farther than the microbubbles. Bubbles can be diffused also in the vicinity of. (8) When the microbubble generator 4 is used in a gas-liquid reaction device or a sewage treatment device, even if the fluid flows backward due to the residual pressure (negative pressure) in the device when the pump is turned on / off, the microbubble is generated. Since the generator 4 does not have pores or the like for taking in gas, clogging due to reactants and dirt does not occur. (9) Since the microbubble generator 4 has no pores or the like for taking in gas, even if the inside of the body 4a is at a high pressure, a backflow does not occur at the time of stoppage, and finer and more bubbles can be ejected. it can. (10) Since a large amount of fine bubbles are generated, the contact area between the gas and the liquid can be increased, and the reaction in the gas-liquid reaction device and the purification in the purification device can be promoted. In addition, the amount of dissolved oxygen in the water (seawater) of a culture pond, a farm, or a fresh fish carrier can be significantly increased. (11) When the liquid phase 11 is an aquarium for transporting live fish,
By causing air flow while supplying air and oxygen into the water tank, fine (μm order) air and oxygen bubbles can be diffused throughout the water tank, and the dissolved oxygen content in the liquid phase (water) can be increased. Therefore, the weakening of the live fish can be slowed down, and long-time transportation is possible. (12) Since fine bubbles can be diffused far away, water purification of ponds and rivers can be performed with high efficiency. (13) Since the gas can be made ultra-fine and highly dispersed in the liquid phase, it is possible to easily clean, absorb, and remove the reaction gas and the exhaust gas in a fine chemical plant. (14) Since the gas flow controller 10 is provided, it is possible to freely adjust the ejection amount of the fine bubbles and also adjust the particle diameter of the fine bubbles.

(Embodiment 2) A water flow type microbubble generator according to Embodiment 2 of the present invention will be described below with reference to the drawings.

FIG. 5 is a configuration diagram of a water flow type microbubble generator according to Embodiment 2 of the present invention. In FIG. 5, 2
Is a pump, 2a is a suction port, 2b is a discharge port, 5 is a water flow pipe,
7 is a gas self-priming pipe for water flow, 8 is a suction pipe, 9 is a strainer,
Reference numeral 11 denotes a liquid phase, which is the same as that in the first embodiment.
6 'is a tapered water flow generation nozzle, 20 is a water flow type microbubble generator according to Embodiment 2 of the present invention, 21 is an introduction pipe whose upstream side is connected to the discharge port 2b of the pump 2, and 22 is an introduction hole 22b. The fine bubble generator 23 according to the second embodiment of the present invention connected to the downstream side of the pipe 21 has one end connected to the gas self-priming hole 22d of the fine bubble generator 22 and the other end in the atmosphere (gas phase). This is an open gas self-priming tube.

FIG. 6 (a) is a perspective view of a main part of a microbubble generator according to Embodiment 2 of the present invention, FIG. 6 (b) is a front view thereof, and FIG. 6 (c) is a main part thereof. It is a side view.
21 is an introduction pipe, 22 is a water flow type microbubble generator, 22a is a vessel having a hollow part (substantially frustoconical or substantially conical) that converges from the rear to the front end, and 22b is vessel 2
Inlet pipe 2 tangentially opened inside trapezoidal portion 2a
Reference numeral 22c denotes a gas-liquid ejection hole formed at the tip of the container 22a, and reference numeral 22d denotes a gas self-priming hole formed at the rear wall of the container 22a and connected to the gas self-priming tube 23.

The operation of the water flow type microbubble generator according to the second embodiment of the present invention having the above-described configuration will be described below with reference to the drawings. FIG. 7 is a cross-sectional view of a main part showing a state of a fluid inside a fine bubble generator according to Embodiment 2 of the present invention. In FIG. 7, 21 is an introduction pipe, 22 is a microbubble generator, 22a is a body, 22b is an introduction hole, 22c is a gas-liquid ejection hole, 22d is a gas self-priming hole,
Numeral 3 denotes a gas self-priming tube, which is the same as that shown in FIG. Y is a negative pressure axis formed by a specific gravity difference between the gas and the liquid of the gas-liquid mixed fluid circling in the fine bubble generator 22. In FIG. 5, when the pump 2 is driven, the liquid in the liquid phase 11
It flows into the introduction pipe 3 through the strainer 9, the suction pipe 8, and the pump 2. The gas-liquid mixed fluid that has flowed into the introduction pipe 3 branches into the fine bubble generator 22 and the water flow pipe 5 and flows therein. In FIG. 7, the high-pressure gas-liquid mixed fluid that has flowed into the microbubble generator 22 from the introduction pipe 21 through the introduction hole 22b from the tangential direction,
While moving along the inner wall surface of the container 22a, it moves toward the gas-liquid ejection hole 22c. At this time, centrifugal force acts on the liquid, and air flows into the center of the container 22 from the gas self-priming tube 23 to form a negative pressure axis Y. In addition, the negative pressure axis Y exerts a force on the liquid in the liquid phase 11 near the gas-liquid ejection hole 22c to enter the microbubble generator 22 by squeezing the gas self-priming tube 23 (hereinafter, this force). The liquid that works is called a negative pressure liquid). On the other hand, as the gas-liquid mixed fluid in the fine bubble generator 22 approaches the gas-liquid ejection hole 22c while turning,
The swirling speed increases, and the swirling speed becomes maximum near the gas-liquid ejection hole 22c, so that the swirling speed is pressed against the negative pressure liquid. Therefore,
The gas collected on the negative pressure axis Y passes through the gap formed by the negative pressure liquid and the swirling gas-liquid mixed fluid as compressed gas, and as a large amount of fine bubbles, the liquid phase is discharged from the gas-liquid ejection hole 22c. It is jetted to 11.

On the other hand, the gas-liquid mixed fluid that has flowed into the water flow pipe 5 is mixed with the air from the water flow gas self-priming pipe 7 at the water flow nozzle 6 and jetted out, as in the first embodiment. The fine bubbles generated and ejected from the gas-liquid ejection holes 22c of the fine bubble generator 22 are diffused over a wide range.

According to the water flow type microbubble generator of the second embodiment of the present invention configured as described above, the following operation can be obtained. (1) Even if only a liquid, not a gas-liquid mixed fluid, flows into the container 22a from the introduction pipe 21, centrifugal force acts on the liquid flowing into the container 22a from the tangential direction, and the central part is depressurized accordingly. , And self-primed from the gas self-priming tube 23 to flow therethrough to form the negative pressure axis Y. (2) The gas-liquid mixed fluid that has flowed into the water flow pipe 5 from the introduction pipe 21 flows into the liquid phase and forms a water flow. The microbubbles jetted from the gas-liquid jet holes 22c of the microbubble generator 22 can be diffused over a wide range along the water flow. (3) Only one pump 2 is used as the driving unit,
Fine bubbles and water flow can be generated. (4) When air or a reaction gas is used in the impeller or casing of the pump 2, the reaction gas is not sucked, so that cavitation of the pump can be prevented. (5) The gas is directly supplied from the gas self-priming tube 23 to the fine bubble generator 2.
2 so that it is activated when used in a reactor (for example, HCl, fluorine compounds, COCl 2).
₂ ) does not enter the casing of the pump 2, so that the durability of the pump can be improved even when used in a chemical reaction device. (6) The selection of the pump 2 can be made only by the type of the liquid, which is excellent in versatility. (7) When the liquid phase 11 is in an aquarium for transporting live fish,
By creating a water flow while supplying oxygen into the aquarium,
The live fish can be prevented from weakening, and long-time transportation is possible. (8) By appropriately selecting the ratio of the inner diameter of the suction side to the discharge side of the tapered water flow generation nozzle 6 'and the distance between the suction side and the discharge side, it is possible to discharge at a desired discharge amount and discharge pressure. (9) The tapered water flow generation nozzle 6 'has a simple structure in which the inner diameter decreases toward the discharge side, so that it is excellent in maintenance and durability.

[0037]

As described above, according to the water flow type microbubble generator of the present invention, the following advantageous effects can be obtained.
According to the first aspect of the present invention, the following effects are obtained. (1) When a high-pressure gas-liquid mixed fluid flows into the housing from the introduction pipe, the gas-liquid mixed fluid flowing into the housing from the tangential direction turns along the inner wall surface of the housing and is violently mixed. While moving toward the gas-liquid orifice side. At this time, due to the difference in specific gravity between the liquid and the gas, a centrifugal force acts on the liquid, a centripetal force acts on the gas, and the gas is focused on the central axis to form a negative pressure axis. In addition, a force that tries to enter the microbubble generator acts on the liquid-phase liquid near the gas-liquid ejection hole due to the negative pressure axis (hereinafter, the liquid on which this force acts is referred to as a negative pressure liquid). On the other hand, as the gas-liquid mixed fluid in the microbubble generator approaches the gas-liquid orifice while swirling, the swirling speed increases and the pressure increases, and the swirling speed and pressure become maximum near the gas-liquid orifice, It comes into a state of pressing against the negative pressure liquid. The gas collected on the negative pressure axis passes through the gap formed by the negative pressure liquid and the swirling gas-liquid mixed fluid as compressed gas while being sheared, and as a large amount of fine bubbles along with the gas-liquid mixed fluid. It is ejected from the liquid ejection hole into the liquid phase. (2) The gas collected on the negative pressure axis is compressed / sheared by the gas-liquid mixed fluid and the negative pressure liquid ejected while rotating, and is ejected so as to be torn off. Of fine bubbles can be generated. (3) The gas-liquid mixed fluid that has flowed into the water flow pipe from the introduction pipe flows into the liquid phase and forms a water flow. The microbubbles are diffused over a wide area along the water flow. (4) It is not necessary to separately provide a pump for generating microbubbles and a pump for generating water flow, and a single pump can generate microbubbles and a water flow, so that productivity is excellent and maintenance is excellent. (5) Since a large amount of fine bubbles are generated, the contact area between the gas and the liquid can be increased, and the reaction in the gas-liquid reaction device and the purification in the purification device can be promoted. In addition, the amount of dissolved oxygen in the water (seawater) of the culture pond, the farm, or the live fish transport vehicle can be increased.

According to the invention described in claim 2, according to claim 1
In addition to the effects described above, the following effects are provided. (1) Since the gas-liquid ejection holes are formed substantially symmetrically with respect to the introduction pipe of the container, a large amount of fine bubbles can be diffused from both sides of the container over a wider range. (2) Since two gas-liquid ejection holes are provided, it is possible to easily adjust the particle diameter of the fine bubbles. (3) The generation rate of fine bubbles can be significantly increased.

According to the invention described in claim 3, according to claim 1
In addition to the effects described above, the following effects are provided. (1) Even if only a liquid, not a gas-liquid mixed fluid, flows into the container from the inlet pipe, the liquid flowing into the container from the tangential direction acts on the liquid by centrifugal force, so that the central portion becomes negative pressure and the central portion becomes negative pressure. The gas flows from the gas self-priming tube to form a negative pressure axis. (2) The gas self-priming tube is opened to the atmosphere, or a target absorption or reaction gas (for example, CO ₂ , HCl, HCN, SO
₂ , COCl ₂ , fluorine compound gas or other reaction gas), the gas can be absorbed or reacted with the liquid.

According to the invention described in claim 4, according to claim 1 of the present invention,
The following effects are obtained in addition to the effects described in any one of (3) to (3). (1) Since the water flow generation nozzle is extended, the flow velocity of the liquid or the gas-liquid mixed fluid flowing out of the water flow pipe can be increased, and the fine bubbles can be diffused over a wider range. (2) The liquid phase can be mixed and agitated, and the dissolution spot of gas can be suppressed.

According to the fifth aspect of the present invention, the following effects are obtained in addition to the effects of any one of the first, second, and fourth aspects. (1) When the pump is driven, gas is sucked from the gas self-priming pipe into the suction pipe as an accompanying flow of the fluid flowing through the suction pipe, and flows into the body as a gas-liquid mixed fluid. (2) Since the gas sucked from the gas self-priming pipe is diffused to some extent by the impeller in the pump and then flows into the container, finer bubbles can be generated. (3) It is not necessary to separately provide a pump for generating microbubbles and a pump for generating water flow, and a single pump can generate microbubbles and a water flow, so that productivity and maintenance are excellent. (4) Since gas flows not only into the fine bubble generator but also into the water flow tube, it is possible to blow out fine bubbles blown out from the fine bubble generator and large bubbles blown out from the water flow tube. The large bubbles float relatively quickly after being ejected from the water flow tube, and the fine bubbles float after traveling a longer distance than the large bubbles after being ejected. Therefore, large bubbles can be diffused near the microbubble generator and fine bubbles can be diffused far away.

According to the invention of claim 6, according to claim 3,
Or, in addition to the effects of 4, the following effects are obtained. (1) When the pump is driven, the fluid flows from the suction pipe through the pump to the introduction pipe or the water flow pipe. (2) It is not necessary to separately provide a pump for generating microbubbles and a pump for generating water flow, and a single pump can generate microbubbles and a water flow, so that productivity is excellent and maintenance is excellent. (3) Since air or reactive gas is not sucked into the impeller or casing of the pump, it is possible to prevent the pump from cavitation. (4) Since active reaction gas (for example, HCl, a fluorine compound, COCl _2, etc.) does not enter the casing of the pump, the durability of the pump can be improved. (5) The selection of the pump can be made only by the type of the liquid, which is excellent in versatility. (6) When the microbubble generator and the suction tube are put in the same liquid phase, the gas dissolution rate can be significantly increased, and the liquid phase can be stirred to significantly increase the gas absorption efficiency and the reaction rate.

[0043]

[Brief description of the drawings]

FIG. 1 is a state diagram showing a state in which a water flow type microbubble generator according to Embodiment 1 of the present invention is installed in a fish cage.

FIG. 2A is a perspective view of a main part of the fine bubble generator according to the first embodiment of the present invention. FIG. 2B is a front view of a main part of the fine bubble generator according to the first embodiment of the present invention. Side view of main part of microbubble generator in embodiment 1

FIG. 3 is a side sectional view showing an example of a water flow generation nozzle according to the first embodiment of the present invention.

FIG. 4 is an essential part front view showing the state of the fluid inside the fine bubble generator according to Embodiment 1 of the present invention.

FIG. 5 is a configuration diagram of a water flow type microbubble generator according to Embodiment 2 of the present invention.

FIG. 6A is a perspective view of a main part of a microbubble generator according to a second embodiment of the present invention. FIG. 6B is a front view of a main part of the microbubble generator according to the second embodiment of the present invention. Side view of main part of microbubble generator in embodiment 2

FIG. 7 is a sectional view of a main part showing a state of a fluid inside a microbubble generator according to Embodiment 2 of the present invention.

[Explanation of symbols]

 Reference Signs List 1 water flow type fine bubble generator 2 pump 2a suction port 2b discharge port 3 introduction pipe 4 fine bubble generator 4a body 4b introduction hole 4c gas-liquid ejection hole 5 water flow pipe 6 water flow generation nozzle 6 'tapered water flow generation nozzle 6a water flow Apparatus 6b Water flow suction pipe 6c Water flow gas self-priming hole 6d Water flow gas ejection hole 7 Water flow gas self-priming pipe 8 Suction pipe 9 Strainer 10 Gas self-priming pipe 10a Gas flow regulator 11 Liquid phase 11a Water-flow type 20 Fine water bubbles Generator 21 Inlet tube 22 Water flow type fine bubble generator 22a Body 22b Inlet hole 22c Gas-liquid ejection hole 22d Gas self-priming hole 23 Gas self-priming tube

Claims (6)

[Claims] 1. A method comprising: a. A container having a hollow portion having a shape converging from the rear side toward the front end, an introduction hole disposed tangentially on the rear side of the container, and a front end of the container. A micro-bubble generator having a gas-liquid orifice; b. An inlet pipe having a downstream side connected to the inlet hole; c. A water flow pipe connected to a predetermined portion of the introduction pipe and having an open downstream side. 2. A container having therein a hollow portion having a shape converging from an intermediate portion toward both ends, and a container tangentially disposed in the intermediate portion of the container. 2. An introduction tube having an introduction hole opened in a body, and a gas-liquid ejection hole drilled at a position substantially symmetric about the introduction tube of the vessel. Water flow type fine bubble generator. 3. A gas self-priming hole formed in a rear end portion or a rear wall of the microbubble generator, and a gas self-priming tube having one end connected to the gas self-priming hole and the other end opened. The water flow type fine bubble generator according to claim 1, further comprising: 4. The apparatus according to claim 1, further comprising a water flow generation nozzle disposed downstream of said water flow pipe.
The water flow type fine bubble generator according to any one of the above. 5. A pump having a suction port and a discharge port, wherein the upstream of the introduction pipe is connected to the discharge port, a suction pipe downstream of which is connected to the suction port of the pump, and one end of the suction pipe is connected to the suction port. A water flow type microbubble according to any one of claims 1, 2, and 4, further comprising: a gas self-priming tube connected to a predetermined portion of the tube and having the other end opened in gas. Generator. 6. A pump having a suction port and a discharge port, wherein the discharge port has an upstream side of the introduction pipe connected to the discharge port, and a downstream side has a suction pipe connected to the suction port of the pump. The water flow type fine bubble generator according to claim 3 or 4, wherein: