JP7442846B2 - Gas solution generation device - Google Patents

Description

The present invention relates to a gas solution generating device that generates a gas solution by dissolving a gas such as oxygen or air in water or other liquid.

Similar to the gas-dissolved liquid generating device according to the present invention, an example of a device having a function of generating gas-dissolved water by dissolving a gas such as oxygen or air in water is the “fine bubble generating device” described in Patent Document 1. "It has been known.

The "fine bubble generator" described in Patent Document 1 includes a gas-liquid swirling chamber having a cylindrical space in which gas and liquid can swirl, and a liquid being introduced into the gas-liquid swirling chamber to generate liquid in the gas-liquid swirling chamber. a liquid introducing means arranged on the base end side of the gas-liquid swirling chamber to generate a swirling flow; and a gas introducing means provided in communication with the gas-liquid swirling chamber to supply gas to the gas-liquid swirling chamber. a gas-liquid discharge port disposed on the tip side of the gas-liquid swirling chamber for discharging the gas-liquid in the gas-liquid swirling chamber; and a gas-liquid contact chamber into which the gas-liquid discharged from the gas-liquid discharge port is introduced. and a gas-liquid outlet for discharging the gas-liquid in the gas-liquid contact chamber.

By using the "fine bubble generator" described in Patent Document 1, it is possible to generate gas-dissolved water in which gases such as air and oxygen are dissolved, and this gas-dissolved water can be used as water for plant cultivation or for fish and shellfish aquaculture. It can be widely used for purposes such as irrigation water, and has a positive impact on the growth of plants and seafood.

Patent No. 3765759

The "micro bubble generator" described in Patent Document 1 can efficiently generate a liquid in which micro bubbles are dissolved (gas solution), and can significantly reduce the space and piping materials required for installation. However, improving the production efficiency of gaseous solution will continue to be an important issue in the future.

Therefore, an object of the present invention is to provide a gas-dissolved liquid generating device that can efficiently and stably generate a liquid in which a large amount of gas is dissolved.

A gas-dissolved liquid generating device according to the present invention includes a gas-liquid contact tank having an airtight structure capable of containing a liquid, and a gas-liquid contact tank arranged in the gas-liquid contact tank and containing a liquid and a gas supplied from outside of the gas-liquid contact tank. a fine bubble generator that mixes and discharges a liquid containing fine bubbles into the gas-liquid contact tank; a liquid introduction path that supplies the liquid from outside the gas-liquid contact tank to the fine bubble generator; and the gas-liquid contactor. a check valve disposed in the liquid introduction path exposed to the outside of the tank; a gas introduction path that supplies gas from outside the gas-liquid contact tank to the fine bubble generator; and a gas introduction path from the fine bubble generator to the gas-liquid contact tank. a drainage path for discharging the gas solution formed from the liquid mixed with fine bubbles discharged into the gas-liquid contact tank to the outside of the gas-liquid contact tank;
The fine bubble generator includes a gas-liquid swirling chamber having a cylindrical space in which gas and liquid can swirl, and a plurality of liquid spouting ports that spout liquid supplied via the liquid introduction path into the gas-liquid swirling chamber. a gas jetting port for spouting the gas supplied via the gas introduction path into the gas-liquid swirling chamber; and a gas jetting port for spouting the liquid mixed with fine bubbles from the gas-liquid swirling chamber into the gas-liquid contact tank. A liquid discharge port is provided.

The liquid spout of the gas-dissolved liquid generating device is provided at a position for spouting the liquid in a direction that is twisted with respect to the central axis of the gas-liquid swirling chamber, and the liquid spout is provided in a position in which the liquid is spouted in a direction that is twisted with respect to the central axis of the gas-liquid swirling chamber. It forms a swirling flow that rotates around the

Further, the gas jetting port blows out the gas near the center of the swirling flow, thereby moving the liquid and the gas downward while swirling in the gas-liquid swirling chamber. Fine bubbles are generated by passing through the gas-liquid discharge port provided on the lower partition wall, and the liquid is caused to flow into the gas-liquid contact tank as a liquid mixed with the fine bubbles.

Further, in the gas-liquid contact tank, the upstream side of the drainage path is arranged vertically, and the opening of the drainage path is oriented in the anti-gravity direction. By arranging the fine bubble generator, the liquid containing fine bubbles flowing into the gas-liquid contact tank is caused to rise in the gas-liquid contact tank, and during this rise, the liquid in the fine bubbles is While dissolving the gas in the liquid, separating the excess gas and causing the gas-dissolved liquid to flow into the drainage path from the opening located below the water surface in the gas-liquid contact tank. and lowering the inside of the drainage path.

Furthermore, by adjusting the flow rate in the drainage path with a flow rate adjustment valve provided in the middle of the drainage path, the water pressure in the gas-liquid contact tank is maintained at a constant value, and the gas of the gas solution is The dissolution rate is maintained constant.

According to the present invention, it is possible to provide a gas-dissolved liquid generating device that can efficiently and stably generate a liquid in which a large amount of gas is dissolved.

1 is a partially omitted vertical cross-sectional view showing an oxygen-dissolved water generating device according to an embodiment of the present invention. 2 is a partially omitted horizontal sectional view taken along line AA in FIG. 1. FIG. FIG. 2 is a partially omitted schematic diagram showing how the oxygen-dissolved water generating device shown in FIG. 1 is used.

Hereinafter, an oxygen-dissolved water generating apparatus 100, which is one embodiment of a gas-dissolved liquid generating apparatus according to the present invention, will be described based on FIGS. 1 to 3.

As shown in FIG. 1, the oxygen-dissolved water generating device 100 includes a gas-liquid contact tank 1 capable of accommodating oxygen-dissolved water OW, and water disposed inside the gas-liquid contact tank 1 and supplied from outside the gas-liquid contact tank 1. A fine bubble generator 2 mixes W and oxygen O ₂ and discharges water MBW mixed with fine bubbles MB into the gas-liquid contact tank 1, and a fine bubble generator 2 supplies water W from outside the gas-liquid contact tank 1 to the fine bubble generator 2. A gas introduction path 4 supplies oxygen O 2 from outside the gas-liquid contact tank 1 to the fine bubble generator 2, and a gas introduction path 4 supplies oxygen O ₂ from the outside of the gas-liquid contact tank 1 to the gas-liquid contact tank 1. A drain path 5 is provided for discharging oxygen-dissolved water OW formed from water MBW mixed with air bubbles MB to the outside of the gas-liquid contact tank 1. A check valve 7 is arranged in the middle of the liquid introduction path 3 exposed to the outside of the gas-liquid contact tank 1, and a flow rate adjustment valve 8 is arranged in the middle of the liquid drainage path 5 exposed to the outside of the gas-liquid contact tank 1. There is.

The gas-liquid contact tank 1 includes a cylindrical peripheral wall portion 1a, a bottom plate portion 1b that closes the lower surface of the peripheral wall portion 1a, and a top plate portion 1c that closes the upper surface of the peripheral wall portion 1a, and has an airtight structure. There is. An elbow-shaped exhaust pipe 6a is connected to a portion of the peripheral wall 1a of the gas-liquid contact tank 1 near the top plate 1c, and an exhaust means 6 is provided above the upright portion of the exhaust pipe 6a. The exhaust means 6 communicates with the inside of the gas-liquid contact tank 1 via an exhaust pipe 6a. As will be described later, the exhaust means 6 has a function of discharging undissolved gas remaining in the upper part of the gas-liquid contact tank 1 (the part near the top plate 1c) to the outside of the gas-liquid contact tank 1.

The fine bubble generator 2 includes a gas-liquid swirling chamber 21 having a cylindrical space in which gas and liquid can swirl, and a plurality of gas-liquid swirling chambers 21 that eject water W supplied via the liquid introduction path 3 into the gas-liquid swirling chamber 21. A liquid spout 22 , a gas spout 4 a that spouts oxygen O ₂ supplied via the gas introduction path 4 into the gas-liquid swirling chamber 21 , and a gas spout 4 a that spouts oxygen O 2 supplied via the gas introduction path 4 into the gas-liquid swirling chamber 21 . A gas-liquid discharge port 23 for discharging water MBW into the gas-liquid contact tank 1 is provided.

The micro bubble generator 2 includes a cylindrical casing 20 and a cylindrical liquid introduction part 24 that is disposed so as to pass through an upper partition wall 20a that closes the upper surface of the casing 20 and hang down into a gas-liquid swirling chamber 21. , is equipped with. The lower surface of the casing 20 is closed by a lower partition wall 20b, and a gas-liquid discharge port 23 is opened at the center of the lower partition wall 20b. The inner diameter of the casing 20 is larger than the outer diameter of the liquid introduction part 24, the central axis (not shown) of the liquid introduction part 24 is the same as the central axis 21c of the gas-liquid swirling chamber 21, and the liquid introduction part 24 is larger than the outer diameter of the liquid introduction part 24. It is arranged coaxially with 20.

The lower surface of the liquid introduction part 24 is closed by a lower partition wall 24b, and the upper part of the liquid introduction part 24 is connected to a liquid introduction path 3 that penetrates the peripheral wall 1a of the gas-liquid contact tank 1 and is arranged in the gas-liquid contact tank 1. It is connected to the elbow part 3a of. A plurality of liquid jet ports 22 are provided in a portion of the peripheral wall portion 24a of the cylindrical liquid introducing portion 24 near the lower partition wall 24b. As shown in FIG. 2, the plurality of liquid ejection ports 22 are opened at positions for ejecting liquid along a direction that is twisted with respect to the central axis 21c of the gas-liquid swirling chamber 21 of the micro bubble generator 2. ing.

The gas introduction path 4 penetrates the top plate 1c of the gas-liquid contact tank 1 and hangs down into the gas-liquid contact chamber 1, penetrates the peripheral wall 3b of the liquid introduction path 3 and enters the liquid introduction part 24, It is arranged coaxially with the central axis 21c of the gas-liquid swirling chamber 21, and the lower end side of the gas introduction path 4 (the side of the gas jet port 4a) penetrates the lower partition wall 24b of the liquid introduction part 24 to form the gas-liquid swirling chamber. The gas jet port 4 a protrudes into the gas-liquid swirling chamber 21 and is located on the central axis 21 c within the gas-liquid swirling chamber 21 .

As shown in FIG. 1, in the oxygen-dissolved water generation device 100, the fine bubble generator 2 has a gas-liquid discharge port 23 in a portion of the gas-liquid contact tank 1 near the bottom plate 1b in the direction of gravity (in the direction of the bottom plate 1b). ). In addition, in the oxygen-dissolved water generating device 100, the upstream side of the liquid drainage path 5 is arranged vertically in the gas-liquid contact tank 1, and the opening 5a of the liquid drainage path 5 is arranged in the gas-liquid contact tank 1. A downward flow bubble separation path is formed by arranging it in the anti-gravity direction (towards the top plate 1c) in a portion near the top plate 1c.

Next, an example of use of the oxygen-dissolved water generating apparatus 100 shown in FIG. 1 will be described based on FIG. 3. As shown in FIG. 3, the upstream side of the liquid introduction path 3 of the oxygen-dissolved water generation device 100 is connected to a water source (not shown) such as irrigation water or a well via a water pump 9, and the downstream side of the liquid drainage path 5 The sides are extended to designated irrigation facilities (not shown). Further, the upstream side of the gas introduction path 4 is connected to an oxygen cylinder 10 via an oxygen gas regulator 11.

The water supply pump 9 is operated to supply water W via the liquid introduction path 3 to the oxygen-dissolved water generation device 100 shown in FIG. When oxygen O ₂ is supplied via the introduction path 4, water W flows into the liquid introduction part 24 of the micro bubble generator 2, and then flows through the plurality of liquid jet ports 22, as shown in FIGS. 1 and 2. The oxygen O 2 passes through and is ejected into the gas-liquid swirling chamber 21 , and oxygen O ₂ is ejected into the gas-liquid swirling chamber 21 from the gas ejection port 4 a at the lower end portion of the gas introduction path 4 .

At this time, the water W ejected from the plurality of liquid ejection ports 22 is ejected along the direction of the twisting position with respect to the central axis 21c of the gas-liquid swirling chamber 21. A swirling flow S rotating around the axis 21c is formed, and oxygen O ₂ ejected from the gas jet port 4a is supplied near the center of the swirling flow S.

In this way, when oxygen O ₂ is supplied from the gas jet port 4a to the swirling flow S formed in the gas-liquid swirling chamber 21, the water W that moves downward while swirling in the gas-liquid swirling chamber 21 When oxygen O ₂ and oxygen O 2 pass through the gas-liquid discharge port 23 of the lower partition wall 20b of the gas-liquid swirling chamber 21, a large amount of microbubbles MB containing oxygen O ₂ are generated in the water W, and the microbubbles MB formed thereby Water MBW mixed with air bubbles MB flows into the gas-liquid contact tank 1.

The water MBW mixed with microbubbles MB that has flowed into the gas-liquid contact tank 1 rises in the gas-liquid contact tank 1, but in this process, the oxygen O ₂ in the microbubbles MB dissolves into the water W. The water becomes oxygen-dissolved water OW, flows into the drainage path 5 from the opening 5a at the upper end of the drainage path 5, descends inside the drainage path 5, and flows inside the drainage path 5 outside the gas-liquid contact tank 1. The water is then fed to a predetermined irrigation facility (not shown).

The use of the oxygen-dissolved water OW generated by the oxygen-dissolved water generation device 100 is not limited, so it can be widely used as water for plant cultivation, water for fish and shellfish cultivation, etc. It is possible to improve the growth condition of.

When water MBW mixed with fine bubbles MB flows in the gas-liquid contact tank 1, excess oxygen O ₂ gas becomes large bubbles 12 with buoyancy and is separated from the oxygen-dissolved water OW descending in the drainage path 5. The gas rises and is stored in a gas reservoir 1d on the lower surface of the top plate portion 1c of the gas-liquid contact tank 1. When the volume of undissolved oxygen O ₂ gas stored in the gas reservoir 1d increases and the water level 13 in the gas-liquid contact tank 1 becomes lower than the connecting portion between the exhaust pipe 6a and the peripheral wall portion 1a, the gas reservoir 1d The undissolved oxygen O ₂ gas present in the exhaust gas passes through the exhaust pipe 6a and is discharged from the exhaust means 6 into the atmosphere.

In this way, when the undissolved oxygen O ₂ gas present in the gas reservoir 1d exceeds a certain amount, it passes through the exhaust pipe 6a and is discharged from the exhaust means 6 into the atmosphere. Dissolved oxygen O ₂ gas can be prevented from becoming a gas mass and being discharged from the opening 5 a of the drain path 5 .

In the oxygen-dissolved water generation device 100, the check valve 7 is disposed in the middle of the liquid introduction path 3, so that the oxygen cylinder 10 is supplied to the fine bubble generator 2 in a pressurized state via the gas introduction path 4. It is possible to prevent the oxygen O ₂ gas from flowing back to the upstream side of the liquid introduction path 3.

In the oxygen-dissolved water generation device 100, the flow rate adjustment valve 8 is disposed in the middle of the drain path 5, so by adjusting the flow rate in the drain path 5 with the flow rate adjustment valve 8, the gas-liquid contact tank 1 The water pressure inside can be maintained at a constant value, and thereby the oxygen dissolution rate of the oxygen-dissolved water OW can be maintained constant. In this way, by using the oxygen-dissolved water generating device 100, oxygen-dissolved water OW in which a large amount of oxygen is dissolved can be efficiently and stably generated.

Note that the oxygen-dissolved water generating device 100 has a function of dissolving oxygen O ₂ gas in water W to generate oxygen-dissolved water OW, but is not limited to this, and can be used with other than oxygen O ₂ gas. It is also possible to generate gas-dissolved water by dissolving gas in a liquid other than water W. Further, the oxygen-dissolved water generating device 100 described based on FIGS. 1 to 3 is an example of the gas-dissolved water generating device according to the present invention, and the gas-dissolved water generating device according to the present invention is similar to the one described above. The present invention is not limited to the oxygen-dissolved water generating device 100.

The gas-dissolved water generating device according to the present invention can be widely used in industrial fields such as agriculture and forestry, livestock farming, and fisheries.

1 Gas-liquid contact tank 1a, 3b, 24a Peripheral wall portion 1b Bottom plate portion 1c Top plate portion 1d Gas reservoir 2 Fine bubble generator 3 Liquid introduction path 3a Elbow portion 4 Gas introduction path 4a Gas spout 5 Drainage path 5a Opening 6 Exhaust means 6a Exhaust pipe 7 Check valve 8 Flow rate adjustment valve 9 Water pump 10 Oxygen cylinder 11 Oxygen gas regulator 12 Large bubble 13 Water surface 20 Casing 20a Upper partition 20b, 24b Lower partition 21 Gas-liquid swirling chamber 21c Central axis 22 Liquid jet Outlet 23 Gas-liquid discharge port 24 Liquid introduction part 100 Oxygen-dissolved water generator MB Microbubbles MBW Water mixed with microbubbles OW Oxygen-dissolved water S Swirling flow W Water

Claims (1)

A gas-liquid contact tank with an airtight structure capable of containing liquid;
a fine bubble generator disposed in the gas-liquid contact tank that mixes a liquid and gas supplied from outside the gas-liquid contact tank and discharges a liquid containing fine bubbles into the gas-liquid contact tank;
a liquid introduction path for supplying liquid to the microbubble generator from outside the gas-liquid contact tank;
a check valve disposed in the liquid introduction path exposed outside the gas-liquid contact tank;
a gas introduction path for supplying gas to the fine bubble generator from outside the gas-liquid contact tank;
a drainage path for discharging a gas solution formed from a liquid mixed with fine bubbles discharged from the fine bubble generator into the gas-liquid contact tank to the outside of the gas-liquid contact tank;
Equipped with
The fine bubble generator is
a gas-liquid swirling chamber having a cylindrical space in which gas and liquid can swirl;
a plurality of liquid ejection ports that eject the liquid supplied via the liquid introduction path into the gas-liquid swirling chamber;
a gas ejection port that ejects the gas supplied via the gas introduction path into the gas-liquid swirling chamber;
a gas-liquid discharge port for discharging the liquid containing fine bubbles in the gas-liquid swirling chamber into the gas-liquid contact tank;
The liquid spout is provided at a position that spouts liquid in a direction that is twisted with respect to the central axis of the gas-liquid swirling chamber, and creates a swirling flow that rotates around the central axis within the gas-liquid swirling chamber. form,
The gas spout is configured to eject the gas near the center of the swirling flow, thereby moving the liquid and the gas downward while swirling within the gas-liquid swirling chamber, thereby creating a lower part of the gas-liquid swirling chamber. Generating fine bubbles by passing through the gas-liquid discharge port provided in the partition wall, and causing the fine bubbles to flow into the gas-liquid contact tank as a liquid mixed with the fine bubbles,
In the gas-liquid contact tank, the upstream side of the drainage path is arranged in a vertically standing manner, and the opening of the drainage path is arranged in the gas-liquid contact tank with the opening facing in the anti-gravity direction. By doing so, the liquid containing fine bubbles that has flowed into the gas-liquid contact tank from the fine bubble generator is raised in the gas-liquid contact tank, and during this rise, the gas in the fine bubbles is removed. Dissolving the gas in the liquid and causing separation of the excess gas, causing the gas-dissolved liquid to flow into the drainage path from the opening located below the water surface in the gas-liquid contact tank. , lowering the liquid in the drainage path;
By adjusting the flow rate in the drainage path with a flow rate adjustment valve provided in the middle of the drainage path, the water pressure in the gas-liquid contact tank is maintained at a constant value, and the gas dissolution rate of the gas-dissolved liquid is adjusted. A gas solution generating device that maintains a constant state.

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