JP2000325767A - Apparatus for generating gas-liquid mixed stream and gas-liquid mixing unit pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide an apparatus and a mixing unit pipe simple in structure and certainly mixing finely divied air bubbles with a liquid and to supply a gas-liquid mixed stream mixed with fine air bubbles to a predetermined use machinery. SOLUTION: A mixing unit pipe 10 is arranged to a part of a liquid supply piping route and a partition plate 11 having at least two angled fine holes 12 bored therein is provided to the unit pipe 10. A liquid is ejected through the fine holes 12 of the unit pipe 10 to allow ejected liquid streams to collide with each other to finely divide air into fine air bubbles to generate gas-liquid mixed streams mixed with fine air bubbles on the downstream side of the partition wall 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for generating a gas-liquid mixed flow, and more particularly to a water treatment apparatus, an aeration apparatus, a heat exchange apparatus, a ground improvement apparatus, and the like. The present invention relates to an apparatus for supplying a flow and a unit pipe for gas-liquid mixing used in the apparatus.

[0002]

2. Description of the Related Art Conventionally, in the technical field of water treatment, aeration is generally performed using a blower to supply oxygen to an aeration tank in aerobic treatment. In addition, a large amount of air needs to be supplied in order to secure the amount of dissolved oxygen of the air dissolved in the tank by causing the bubbles to float quickly from the tank and cause gas-liquid separation in a short time. Further, in the ground improvement method, it is proposed that if the ground improvement chemical solution (injection material) is injected into the ground in a state where air bubbles are mixed therein, the penetration effect of the injection material can be increased and the improvement effect can be improved. However, when the bubbles are large, the effect is small. Therefore, it is required that the gas-liquid mixed flow generation device generate as fine bubbles as possible and mix them into the liquid.

On the other hand, as a conventional apparatus for generating fine bubbles, a cascade pump, a static mixer, a special nozzle using negative pressure, and a bubble generating apparatus using a fine porous body are known. However, these conventional devices do not provide the desired microbubbles or, even if they can, increase the size and complexity of the device and increase costs, as well as high running costs such as electricity costs and parts replacement. There was a defect.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention provides an apparatus and a mixing unit tube for reliably mixing a liquid in a state of finely divided bubbles with a simple structure at a low cost. It is an object of the present invention to improve the functions of these devices by supplying the gas-liquid mixed flow mixed with the components to predetermined devices.

[0005]

According to the apparatus for generating a gas-liquid mixed flow of the present invention, a mixing unit is disposed in a part of a piping path for supplying a liquid, and at least two reduced-diameter flows are provided in the unit. The path is provided so that the axis intersects the downstream side of the flow path, the liquid is jetted through the flow path of the unit and collides to form gas into fine bubbles, and the flow path is downstream of the flow path. It is characterized in that a gas-liquid mixed flow in which fine bubbles are mixed is generated. Here, the liquid includes a solution or suspension. Further, the reduced diameter flow path,
Specifically, the partition plate provided in the mixing unit section is constituted by pores opened at an angle (claim 2). Alternatively, the mixing unit section includes at least two ejection pipes and a mixing pipe connected to the tips of the ejection pipes, and the reduced-diameter flow path includes a thin tube section formed on the tip side of the ejection pipe. (Claim 3). The liquid supplied to the mixing unit may be either a case containing a gas in advance or a case not containing a gas. In the former case, the liquid is injected through the reduced diameter flow path of the unit and collides. When pulverized, the gas becomes fine bubbles (claim 4). In the latter case, a gas such as outside air is supplied to the liquid ejection side in the unit section, and the supplied gas is made into fine bubbles when the liquid is ejected. 5) Alternatively, the gas is supplied to the upstream side of the reduced-diameter flow path in the unit portion, and the gas is formed into fine bubbles when the gas is injected through the reduced-diameter flow path and crushed by collision. (Claim 6). In addition, even in the former case, a gas such as outside air may be further supplied to the liquid ejection side in the unit section (claim 5). Is mixed with the liquid. Similarly, even in the former case, a gas such as outside air may be further supplied to the upstream side of the reduced-diameter flow path in the unit (claim 6), or an upstream side of the flow path may be provided. The gas may be supplied to both the injection side and the injection side. The mixing unit may have any shape such as a round or square tubular member or a container type. However, by arranging this mixing unit detachably in a piping path, consumables, replacement members, It can also be used as
In that case, it is preferably a tubular member (claim 7).

[0006]

According to the present invention, the liquid supplied to the pipe route is
The fluid flows through the mixing unit, and the velocity is accelerated when passing through the reduced diameter flow path, and the liquid is ejected from the reduced diameter flow path to collide and pulverize the liquids in the unit at high speed, and also collide and pulverize to the inner wall of the unit. While flowing down. The liquid flow injected from the reduced diameter flow path has a part of the outer periphery in a spray form, but the contact particle diameter of the liquid is further reduced by collision pulverization, and the injection force is large, so that the gas contained in the liquid or introduced. The gas adheres to the fine liquid particles and is efficiently gas-liquid mixed, and at the same time becomes fine bubbles.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 illustrates a case of gas-liquid mixing in a water flow. In FIG. 1, reference numeral 1 denotes a piping path for supplying a water flow, and a mixing unit pipe 10 which is a tubular member is disposed as a mixing unit in a part thereof. The mixing unit tube 10 is made of plastic such as vinyl chloride, and has a partition plate 11 integrally formed at the center thereof. The mixing unit pipe 10 is connected to the water inlet pipe 1a of the pipe path 1 at one end thereof, and a water supply device 2 such as a pump is connected to the water inlet pipe 1a so that the water flow W1 is supplied to the mixing unit pipe. The other end is connected to a water pipe 1b for supplying a mixed flow W3 to a predetermined object 3, for example, a water treatment device, an aeration tank, a heat exchanger, or the like. The mixing unit pipe 10 is connected to the inlet pipe 1 of the pipe line 1.
a, It is preferable that the replacement member is detachable from the water pipe 1b.

In the partition plate 11, two or more pores 12 are opened in a penetrating manner to form a reduced-diameter flow path (in the drawing, four pores are illustrated). The water flow W1 flows through the inlet side 10a of the mixing unit tube 10 through the reduced diameter flow path).
To the injection side 10b (see FIGS. 2 and 3). Each of the fine holes 12 is opened at an angle such that the axes intersect on the injection side 10b of the mixing unit tube 10, in other words, so that the jet flows W2 injected from the fine holes 12 collide with each other. Note that in the figure, each axis of each pore 12 is
However, it is sufficient that at least two jets W2 and W2 collide with each other.

The water flow W1 shown in FIGS. 1 to 3 is preliminarily containing gas (air) by a blower or the like.
It shows the case where it is supplied to. The water flow W1 flows from the water inlet side 10a of the mixing unit pipe 10 to the pores 12, 12,.
To the injection side 10b, but the speed is accelerated when passing through each fine hole 12. Then, the water flow W1 is injected from each of the fine holes 12, and each of the injection flows W2 collides and pulverizes at high speed in the unit pipe on the injection side, and also crushes and pulverizes the inner wall of the unit pipe. Becomes fine water particles. Further, the gas contained in the jet stream W2 becomes finer in combination with the large jetting force. Therefore, since the fine gas adheres to the fine water particles of the jet flow W2, efficient gas-liquid mixing is performed to generate a gas-liquid mixed flow W3, and the gas in the mixed flow W3 is
It is mixed in a state in which fine bubbles are formed as compared with the water flow W1, that is, in a state where buoyancy is small and gas-liquid separation is difficult.

In the above embodiment, a mixing unit tube 10 having a diameter of 13 mm and a length of 80 mm is used.
In the case where the pore diameter of the pore 12 is 1 mm and 2 mm, the number of pores is 2, 3,
I prepared a plurality of samples with 4, 6, and 8 and tested them. According to the test results, it is best that all the jet streams W2 collide with a hole diameter of 2 mm and 8 holes, that is, a mixed stream W3 in which the most fine bubbles are dispersed in a uniform state can be generated. Was. In this case, the sectional area ratio between the mixing unit tube 10 and the eight pores 12 was 18.93%.

FIGS. 4 and 5 show another embodiment of the mixing unit tube. The mixing unit tube 20 is of a self-priming type in which a plurality of outside air introduction holes 22 are opened in the peripheral wall of the injection side 20b. Yes,
Other configurations are the same as those of the above-described embodiment. The introduction hole 22 is
When the water flow W1 supplied to the water inlet side 20a is opened to the injection side 20b through the small holes 12 when the water flow W1 is opened to the injection side peripheral wall in the vicinity of the partition plate 11 where the negative pressure is likely to be generated by the injection flow W2, Outside air is introduced from the introduction hole 22 by the generated negative pressure. The introduced outside air is pulverized by collision and pulverization of the jet stream W2, and is gas-liquid mixed while adhering to fine water particles. In this embodiment, since the water stream W1 also contains a gas in advance, the gas content in the mixed stream W3 'further increases as compared with the embodiment shown in the previous embodiment. However, in the present embodiment, since the outside air is introduced, it is not always necessary to make the water flow supplied to the mixing unit tube 20 contain a gas in advance.

Next, the mixing unit tube illustrated in FIGS.
30 will be described. The mixing unit tube 30 is provided with a partition plate 1 instead of the outside air introduction hole 22 in the mixing unit tube 20.
One or more outside air introduction holes 32 are formed in the peripheral wall on the upstream side of
Is opened, and the gas compressed by the air compressor A is introduced into the outside air introduction hole 32. The other configuration is the same as the above two embodiments. In this embodiment, the ratio of the cross-sectional area in the mixing unit tube 30 to the cross-sectional area in all the pores 12 in the partition plate 11 is preferably set to 25% or less based on test results described later.

The outside air introduction hole 32 is opened on the peripheral wall on the upstream side of the partition plate 11, and is provided on the water inlet side 30 which is pressurized by the water supply device 2.
The gas pressurized by the air compressor A is introduced to a pressure higher than at least the water flow W1 so as to supply gas to the water flow W1 of a. The introduced gas is pulverized by collision and pulverization of the jet stream W2 on the jet side 30b and gas-liquid mixed while adhering to the fine water particles, and becomes a mixed stream W3 ″ on the jet side 30b.

According to the mixing unit tube 30 of this embodiment, the gas introduced from the outside air introduction hole 32 is rapidly accelerated in the pores 12 of the partition plate 11 together with the water flow W1 to become fine bubbles. The bubbles are further pulverized by collision on the ejection side 30b, so that the bubbles are further refined, and a part or all of the gas is dispersed or dissolved in the liquid in a state where it is difficult to perform gas-liquid separation.

Next, the mixing unit tube 40 illustrated in FIG. 9 will be described. The mixing unit pipe 40 is provided with the inlet pipe 1a.
And a mixing tube 43 connected to the tip of each of the ejection tubes 41. In addition, water inlet pipe 1a
The configuration on the upstream side and the downstream side on the mixing pipe 43 are the same as those in the above-described embodiments.

The jetting tube 41 is made of plastic such as vinyl chloride as in the above-described embodiment, and has a narrow tube portion whose diameter is reduced toward the distal end.
41a are formed. The tip of the thin tube portion 41a is connected to a rear end wall 43a of the mixing tube 43 described later. The mixing pipe 43 has a bottomed tubular shape in which the rear end opening is closed by the rear end wall 43a, and the narrow pipe sections 41a of the plurality of ejection pipes 41 cross the axis in the mixing pipe 43 on the rear end wall 43a. The water supply pipe (not shown) similar to the above embodiment is connected to the distal end side.

One or a plurality of outside air introduction holes 42 are opened in the peripheral wall of the water inlet pipe 1a, and the gas compressed by the air compressor A is introduced into the outside air introduction holes 42. is there. The pressure of the gas introduced from the outside air introduction hole 42 is set to be at least higher than the pressure of the water flow W1, similarly to the above-described mixing unit tube 30. Also,
The position of the outside air introduction hole 42 may be on the upstream side of the thin tube portion 41a of the ejection pipe 41, and in this case, the plurality of ejection pipes 41
It is preferable to provide the outside air introduction hole 42 for each of the above.

According to the mixing unit tube 40,
Outside air introduced from the outside air introduction hole 42 of the water inlet pipe 1a is mixed into the water flow W1 supplied from the water supply device 2, and the water flow W
1 is a branch flow W1 ', W1' by a plurality of ejection pipes 41. These branch flows W1 ′, W1 ′ are supplied to the thin tube portions 41a, 41a on the tip side.
The jets W2 and W2 are accelerated within the mixing pipe 43,
Collision crushing within. Then, the mixed flow W3 ″ containing the finely divided gas is discharged to the downstream side of the mixing pipe 43. In the mixing unit pipe 40, the partition plate 11 configured in the above-described three embodiments is used. Since it does not have a pressure loss in the branch flow W1 'in each ejection pipe 41, a gas-liquid mixed flow having a higher flow rate can be supplied.

In each of the above embodiments, the case where water (water stream) is used as the liquid has been described. However, any liquid may be used as long as it is necessary to mix a gas, and is not particularly limited to water. For example, in the case of a ground improvement injection device in which the target object 3 injects a ground injection material from an injection pipe inserted into the ground and penetrates into a soil particle gap, air bubbles are injected into the ground injection material such as cement milk. When mixing, the mixing unit tubes 10, 20, 30, 40 can also be used. In addition, for the mixing unit tube 10, its diameter,
Although the length, the pore diameter and the number of pores of the pores 12 have been exemplified, they are appropriately set according to various conditions according to the purpose of use. Further, although the material of the mixing unit tube 10 is described as being made of plastic, the material is not limited to metal or glass such as a steel tube or a stainless steel tube.

In the mixing unit tube 40 having the above structure,
Although the plurality of ejection pipes 41, 41 are configured to branch off from the water inlet pipe 1a, they are different from each other in place of the branched ejection pipes 41, 41 like a mixing unit pipe 40 'shown in FIG. Are configured such that the discharge pipes 41 ′ and 41 ″ of the two merge into the mixing pipe 43 via the respective narrow pipe sections 41a ′ and 41a ″, thereby omitting the outside air introduction hole 42 and generating bubbles by mixing. The liquids X1 and X2 may be separately circulated through the jet pipes 41 'and 41 ". In this case, for example, the liquid X1 circulated through one jet pipe 41' may be a sodium bicarbonate solution, and the other. If the liquid X2 flowing through the jet pipe 41 ″ is an acidic solution such as phosphoric acid or sulfuric acid, these liquids X1,
The flow of X2 is the flow of each of the thin tube portions 41a 'and 41a "on the tip side.
And accelerated into jets X1 'and X2'. And
In the mixing pipe 43, the jet streams X1 'and X2' collide with each other to generate bubbles, and at the same time, the generated bubbles are pulverized and miniaturized. Therefore, in the mixing unit tube 40 ', the mixed flow X3 including the finely divided gas can be generated without forcibly introducing the outside air as in the above-described embodiment.

Next, with respect to the mixing unit tube 30 of the above embodiment, the state of generation of bubbles was measured by changing the hole diameter and the number of the holes 12 of the partition plate 11, the water supply pressure, the air pressure, the air supply amount, and the like. The test will be described. As shown in FIG. 11, the test apparatus used for this test was a water absorption container 51, a ground pump
52, a flow meter 53, a mixing unit tube 30, an opening / closing valve 54, a bubble measuring device 60, a discharge hose 55, and a water receiving container 56 are sequentially connected to a pipe, and an air compressor A is connected to the outside air introduction hole 32 of the mixing unit tube 30. It is configured to supply outside air. The grout pump 52 is a pump that can supply and drain a mixed liquid such as a ground improvement chemical. In addition, water receiving container
The water stored in 56 is drained to a drainage container 73 by a drainage pump 71 and a drainage hose 72. Water remaining in the test apparatus after the test is drained to a drain container 83 by a drain valve 81 and a drain hose.

In the air bubble measuring device 60, the downstream side of the flange 60a connected to the opening / closing valve 54 side is branched in two directions in the horizontal direction in order to reduce the flow velocity to half, and each of them is parallel. First and fourth vertical transparent tubes 61 and 6
2,63,64 are connected by horizontal transparent tubes 65,66,67. Since the branched front side and the rear side have the same configuration, only the front side will be described below.

The first vertical transparent tube 61 and the second vertical transparent tube 62 are connected by a horizontal connecting tube 65 at an intermediate portion in the longitudinal direction, and the second vertical transparent tube 62 and the third vertical transparent tube 62 are connected to each other. The vertical transparent tube 63 is connected at the lower end by a horizontal connecting tube 66, and the third vertical transparent tube 63 and the fourth vertical transparent tube 64 are horizontally connected at an intermediate portion at substantially the same height as the horizontal connecting tube 65. They are connected by a pipe 67. In the illustrated example, the horizontal connecting pipe 66 is formed by connecting two transparent pipes with a flange 66a. In addition, the first to fourth vertical transparent tubes 61, 62, 63, 64 and the horizontal connecting tube 65,
For 66 and 67, a φ100 mm transparent tube is used.
The lower end of the fourth vertical transparent tube 64 joins the other branched fourth vertical transparent tube 64 and is connected to the discharge hose 55 by a flange 60b. Also, for each of the first to fourth vertical transparent tubes 61, 62, 63, 64, at the upper end thereof,
A transparent measurement bin 60d is attached via an opening / closing valve 60c with its opening facing downward.

Before performing the test, the bubble measuring instrument 60 having the above-described structure absorbs water with the measuring bin 60d removed and the head of the discharge hose 55 positioned higher than the upper end opening of the open / close valve 60c. By doing so, each vertical transparent tube 61, 6
The air in 2, 63 and 64 is evacuated, and then the filled measurement bin 60d is connected to the upper end of each of the open / close valves 60c. That is, the test preparation is completed in a state where each pipe, each valve, and each bin are all filled with water.

When conducting the test, the discharge hose 55
Is lowered to the lower end of the opening / closing valve 60c, the glow pump 52 and the air compressor A are started, and the opening / closing valve 54 is opened for a certain time. And vertical transparent tube
Bubbles floating in 61, 62, 63, 64 and horizontal connecting pipes 65, 66,
Bubbles and the like moving laterally in 67 are visually observed. That is,
If the bubble is large, the bubble floats in the vertical transparent tube on the upstream side and its floating speed is high, and if the bubble is small, the floating speed decreases, so that the bubble flows in the horizontal connecting pipe. It moves sideways and floats in the vertical transparent tube on the downstream side.

The following table shows an example of test data from the above test.

[Table 1]

[Table 2]

[Table 3]

The test data shown in Tables 1 and 2 show
The measurement is performed by changing the hole diameter and the number of the pores 12 of the partition plate 11 in the mixing unit tube 30, the water supply pressure, and the air pressure while the air supply amount is constant. The water supply amount and the air supply amount were set as follows. Water supply amount: 16L Air supply amount: 500cc / min (scale of air flow meter), 647cc / min
(Measured supply)

The test data shown in Table 3 were obtained by changing the air supply amount based on the above-mentioned constant hole diameter and number of holes, water supply pressure and air pressure. The water supply amount and the air supply amount were set as follows. Water supply amount: 16L Air supply amount (Condition 1): 500cc / min (scale of air flow meter), 6
47cc / min (actually measured supply amount) Air supply amount (condition 2): 100cc / min (scale of air flow meter), 1
53cc / min (actually measured supply)

The term “pore diameter−number of pores” in the table indicates the pore diameter and the number of pores 12 of the partition plate 11 in the mixing unit tube 30.
"Sending pressure-Air pressure" refers to the inlet side of the mixing unit tube 30
The water pressure of the water flow W1 sent to 30a and the pressure of the gas supplied to the outside air introduction hole 32 are shown. In this test, the fluid to be sent is fresh water (tap water), and the supplied gas is outside air.

The term "bubble size" in the table means that the diameter of a bubble measured visually is classified into each size range, and the size of the bubble is ultrafine, fine, minute, small, medium, or large. The classification of the dimensional range is as follows. Ultra fine: less than about 0.1 mm Small bubbles: about 1.0 to less than 2.0 mm Fine: about 0.1 to less than 0.5 mm Medium bubbles: less than about 2.0 to 5.0 mm Fine: about 0.5 to less than 1.0 mm Large bubbles: about 5.0 mm or more

The “floating state of mainstream bubbles” in the table means that the speed of bubbles rising in the first to fourth vertical transparent tubes 61, 62, 63, 64 is visually observed, It is expressed as fast and fast. In the table, "how to be swept, state" means the first to fourth.
The presence and state of air bubbles in the vertical transparent tubes 61, 62, 63, 64, and the state of air bubbles at the outlet at the tip of the discharge hose 55 are visually confirmed and described. In the table, "-" means the first to fourth vertical transparent tubes 61, 62, 63 and 64. In addition, "there is a small amount of restored fine bubbles" in the table means that a part of the gas injected from the mixing unit tube 30 is atomized and dissolved in the liquid, and the dissolved gas is dissolved in the bubble measuring device 60. Means that the air bubbles were restored downstream and were visually recognized as fine bubbles.

The term "water supply time" in the table indicates the time from when the open / close valve 54 is opened to when it is closed. In this test, the water supply time is 5 minutes. The “remaining time” in the table means that the air bubbles mixed in the liquid in the air bubble measuring device 60 immediately after the water supply time (5 minutes) has elapsed and the opening / closing valve 54 has been closed are changed. Vertical transparent tubes 61, 62, 63, 64
Shows the time until disappearing by ascending inside. The “substantial air bubble holding time” in the table is the value of the air bubble meter 60 after water supply.
Since the passage time of the gas mixture in the vessel is 4 minutes, a difference of 1 minute from the above water supply time of 5 minutes is referred to as “measurement pipe correction time”, and “water supply time (5 minutes) + remaining time−measurement pipe correction time ( 1
Minutes) ”.

The following tendency was confirmed by the above test. 1. As for the pore diameter, as the diameter increases, the proportion of fine bubbles decreases, and the proportion of larger bubbles increases. 2. Regarding the number of holes, the bubble holding time was prolonged as a result of increasing the number of holes in the case of the hole diameter φ2, but was slightly shorter in other holes. 3. Regarding the water supply pressure, the higher the water supply pressure, the more the amount of fine bubbles generated. 4. As for the air supply amount, the smaller the air supply amount, the more fine bubbles were generated. 5. Regarding the amount of water sent, the larger the amount of water sent, the more fine bubbles were generated. 6. Regarding the ratio of the cross-sectional area in the mixing unit tube 30 to the cross-sectional area in all the pores 12, when the cross-sectional area ratio was 25% or less, the number of fine bubbles tended to increase.

Thus, it was confirmed from the above test that the mixing unit tube 30 of the present embodiment has an effect of generating ultrafine bubbles and dissolving air in the liquid.

By the above operation, the mixing unit pipes 10, 20, 30, 40, and 40 'are provided with a water treatment device, an aeration device, a heat exchange device, a ground improvement device, or a light-weighted heat-insulated building by mixing air bubbles. Equipment for manufacturing foamed parts for use, manufacturing equipment for food mixed with air bubbles such as whipped cream, ozone treatment equipment for ozone sterilization of circulating water or replenishing water in circulating bathtubs and pools, and supply of ultra-fine air bubbles to the bathtub By doing so, it can be effectively used in various technical fields such as a device for increasing a warm bath effect.

[0036]

According to the present invention, the gas contained in the liquid or the introduced gas is formed into fine liquid particles by injecting the liquid from the reduced-diameter flow path and crushing the liquids at high speed in the unit. Attach and efficiently mix gas and liquid, and at the same time, form fine bubbles. Therefore, the gas can be surely mixed with the liquid in a finely divided state, and since a simple and small mixing unit tube is used, it is possible to provide an apparatus having a low production cost, It is possible to reduce running costs such as electricity costs and parts replacement required for operations such as heat exchange and heat exchange. Then, the gas-liquid mixed flow in which the fine bubbles are mixed, that is, the mixed flow in which bubbles having a small buoyancy and difficult to perform gas-liquid separation are supplied to the equipment to be used, such as a water treatment apparatus or an aeration apparatus, is used. Function and performance can be improved.

According to the seventh aspect, since the mixing unit pipe has a detachable pipe structure, it can be used as a consumable item and a replacement member for a gas-liquid mixed flow generator.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an outline of a device of the present invention.

FIG. 2 is an enlarged sectional view of a mixing unit tube which is a main part of the apparatus of the present invention.

FIG. 3 is a sectional view taken along line (3)-(3) in FIG.

FIG. 4 is a sectional view showing another embodiment of the mixing unit tube.

FIG. 5 is a sectional view taken along line (5)-(5) in FIG.

FIG. 6 is a sectional view showing another embodiment of the device of the present invention.

FIG. 7 is an enlarged sectional view of a mixing unit tube which is a main part of the apparatus of the present invention.

FIG. 8 is a sectional view taken along line (8)-(8) in FIG. 7;

FIG. 9 is a sectional view showing another embodiment of the device of the present invention.

FIG. 10 is a sectional view showing another embodiment of the device of the present invention.

FIG. 11 is a piping system diagram of a test apparatus for measuring a state of generation of bubbles.

[Explanation of symbols]

1: Piping route 2: Water supply device 3: Object 10, 20, 30, 40,
40 ': Mixing unit pipe 10a: Inlet side 10b: Injection side 11: Partition plate 12: Micropore (reduced flow path) 20: Mixing unit pipe 10a: Inlet side 10b: Injection side 22, 32, 42: Outside air introduction hole 41 ： Ejection tube 41a ： Narrow tube part (reduced flow channel) 43 ： Mixing tube 60 ： Bubble meter W1 ： Water flow W1 ′ ： Branch flow W
1 'W2, X1', X2 ': jet flow W3, W3', W
3 ", X3: mixed flow

Claims (7)

[Claims] 1. A mixing unit portion is disposed in a part of a piping path for supplying a liquid, and at least two reduced-diameter flow passages are provided in the unit portion so that axes intersect at a downstream side of the flow passage. Generating a gas-liquid mixed flow in which a gas is formed into fine bubbles by injecting and colliding liquid through the flow path of the unit, and a gas-liquid mixed flow in which the fine bubbles are mixed downstream of the flow path. apparatus. 2. The gas-liquid mixed flow generating device according to claim 1, wherein the reduced-diameter flow path is composed of a fine hole opened at an angle to a partition plate provided in the mixing unit. 3. The mixing unit section includes at least two ejection pipes and a mixing pipe connected to the tip of the ejection pipe, and the reduced-diameter flow path is a thin tube formed on the tip side of the ejection pipe. The gas-liquid mixed flow generating device according to claim 1, comprising a portion. 4. The gas-liquid mixed flow generator according to claim 1, wherein the liquid contains a gas in advance, and the gas is formed into fine bubbles. 5. The gas-liquid mixed flow generating apparatus according to claim 1, wherein a gas is supplied to the liquid injection side in the mixing unit, and the gas is made into fine bubbles. 6. The gas-liquid mixed flow generating apparatus according to claim 1, wherein a gas is supplied into the mixing unit upstream of the reduced diameter flow path, and the gas is made into fine bubbles. . 7. A gas-liquid mixing unit pipe in which a partition plate is provided in a pipe of a predetermined length, and at least two pores are opened at an angle so that axes intersect with each other in the partition plate.