JP4128890B2 - Gas-liquid mixing reaction method and gas-liquid mixing reaction apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas-liquid mixing reaction apparatus.
[0002]
[Prior art]
Conventionally, as an example of a gas-liquid mixing reactor, treated water is put into a pressurized tank, and oxygen is supplied into the pressurized tank to dissolve the oxygen in the treated water. In addition, there is a gas-liquid mixing reaction apparatus in which oxygen dissolved in fine water is dissolved again in the treated water by making dissolved oxygen into fine bubbles and floating in the water by releasing the treated water into the atmosphere (for example, patents) Reference 1).
[0003]
As shown in FIG. 6, the gas-liquid mixing reaction apparatus forms a pressurized tank 100 in an upright cylindrical shape, and mixes oxygen mixed with air compressed by an air compressor 200. Supply from the top. On the other hand, to-be-treated water is ejected in a pressurized state from a nozzle 300 disposed on the inside upper part of the pressurized tank 100 with the tip inclined downward and tangential to the pressurized tank 100. Oxygen is dissolved in the water to be treated by generating and rotating an eddy current containing oxygen in the pressurized tank 100 while entraining oxygen in the upper part of the tank 100. Then, the valve 400 provided downstream of the pressurized tank 100 is opened to discharge the water to be treated in the pressurized tank 100 into the atmospheric pressure, whereby the undissolved oxygen is turned into fine bubbles, and the same minute When the bubbles float in the water to be treated for a long time, secondary oxygen movement occurs, and highly efficient oxygen dissolution is performed.
[0004]
The pressurized tank 100 is actually provided with a water level detection sensor and a pressure gauge (not shown) so that the amount and pressure of water to be treated supplied to the pressurized tank 100 can be adjusted. . In the figure, 500 is a pressurizing pump.
[0005]
[Patent Document 1]
JP-A-11-207162 [0006]
[Problems to be solved by the invention]
However, the conventional gas-liquid mixing reaction apparatus supplies a gas mixed with oxygen into the pressurized tank 100 from above and from the nozzle 300 disposed at the upper part of the outer periphery of the pressurized tank 100 to be treated water. Therefore, the undissolved gas stays in the upper portion of the pressurized tank 100.
[0007]
Therefore, water surface management, inflow gas amount management, inflow to-be-treated water amount and pressure management of the pressurized tank 100 are necessary, and it is difficult to sufficiently manage these, and depending on the quality of the to-be-treated water, There were problems such as requiring frequent maintenance. Furthermore, since the gas-liquid mixing reaction apparatus only involves a gas mixed with oxygen by the water to be treated discharged from the nozzle, the oxygen and the water to be treated are not sufficiently mixed, so There was a risk that efficiency would decrease.
[0008]
Further, when the treated water in which the gas is dissolved is opened to the atmosphere, the valve 400 provided downstream of the pressurized tank 100 is opened to release the treated water in the pressurized tank 100 to atmospheric pressure. Since the fine bubbles in which the gas dissolved in the treatment liquid is bubbled do not float sufficiently and evenly in the treatment liquid, there is a possibility that the gas-liquid mixing reaction cannot be performed efficiently.
[0009]
An object of this invention is to provide the gas-liquid mixing reaction method and gas-liquid mixing reaction apparatus which can solve the said subject.
[0010]
[Means for Solving the Problems]
Therefore, in the gas-liquid mixing reaction method according to the first aspect of the present invention, the gas is mixed into the water to be treated by the ejector effect, and the gas is mixed into the cylindrical pressurized tank at a predetermined interval in the circumferential direction of the lower portion of the tank. open the discharged tangentially of the tank bottom from the discharge nozzle in which a plurality arranged, said gas-liquid mixing Ru dissolved in the water to be treated with the gas while moving while turning upward from the bottom of the pressurized tank In the reaction method, the discharge nozzle is formed with a plurality of cuts at the end of a substantially cylindrical pipe body to form a plurality of cut pieces, and each tip of each cut piece is narrowed toward the center of the pipe, Each notch piece is twisted while making a predetermined angle with respect to the axial direction of the pipe body, and the adjacent notch pieces are spaced apart from each other in a certain direction. It is configured so as each other now.
[0011]
Moreover, in this invention of Claim 2, the cylindrical air release tank made into atmospheric pressure is arrange | positioned in the back | latter stage of the said pressurization tank, The to-be-processed water discharged | emitted from the upper part of the said pressurization tank, By discharging in the tangential direction of the tank bottom from the lower part of the air release tank, the gas component dissolved in the water to be treated is made into fine bubbles and suspended in the air release tank upward from the lower part to the water to be treated and the A gas-liquid mixed reaction was performed with gas.
[0012]
In the present invention according to claim 3, the gas is a gas containing at least ozone.
[0013]
In the gas-liquid mixing reactor according to the fourth aspect of the present invention, a plurality of tanks are disposed at a predetermined interval in the circumferential direction of the tank at a lower portion of the cylindrical pressurized tank, and are tangential to the tank bottom surface. A discharge nozzle that can discharge the liquid is disposed, and the discharge nozzle and a suction unit that sucks the water to be treated are connected to each other through the water supply path to be treated, and an ejector is disposed in the middle of the water supply path to be treated. In the gas-liquid mixing reaction apparatus provided with mixing means for mixing gas into the water to be treated by effect , the discharge nozzle forms a plurality of cut pieces by making a plurality of cuts at the tip of a substantially cylindrical pipe body. The notches are squeezed toward the center of the pipe, and the notches are twisted at a predetermined angle with respect to the axial direction of the pipe body, and are adjacent to each other. Interrupt pieces would configured to overlap in a predetermined direction at predetermined intervals.
[0014]
Further, in the present invention according to claim 5, a cylindrical atmospheric release tank having an atmospheric pressure is disposed downstream of the pressurized tank, and a tangential direction with respect to the tank bottom surface is provided at a lower portion of the atmospheric release tank. Discharge nozzles that can be discharged are disposed, and the treated water discharged from the upper part of the pressurized tank is discharged from the lower part of the atmospheric release tank in the tangential direction of the tank bottom, and dissolved in the treated water. The gas component was made into fine bubbles and configured to float in the atmosphere release tank from the bottom upward.
[0016]
Further, in the present invention according to claim 6 , a discharge nozzle having the same shape as the discharge nozzle is provided above each of the pressurization tank and the atmospheric release tank, and further, a predetermined distance is provided from the tank upper surface to the nozzle tip. Separated.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
In the gas-liquid mixing reaction method according to the present invention, gas is mixed into the water to be treated by the ejector effect, and discharged into the cylindrical pressurized tank from the bottom of the tank in the tangential direction of the tank bottom. The gas is dissolved in the water to be treated while moving while turning upward from the lower part of the tank.
[0019]
By the above method, when purification treatment of lakes, rivers, and other various wastewater is performed, the gas necessary for purification can be efficiently mixed into the water to be treated.
[0020]
In particular, a cylindrical atmospheric release tank having an atmospheric pressure is disposed downstream of the pressurized tank, and the water to be treated discharged from the upper part of the pressurized tank is disposed on the bottom surface of the tank from the lower part of the atmospheric release tank. When the gas component is discharged in a tangential direction and the gas component dissolved in the water to be treated is made into fine bubbles and suspended in the atmosphere release tank from the lower part to the upper part, the water to be treated and the gas are subjected to a gas-liquid mixed reaction. Good.
[0021]
In this way, by moving the water to be treated from the lower side to the upper side while swirling, it is easy to dissolve and mix the gas by the water pressure, and the fine bubbles are mixed in a narrow area in the air release tank. So the reactivity is improved. Therefore, the gas-liquid mixing reaction can be performed more efficiently by sufficiently dissolving the gas-liquid.
[0022]
The gas to be used is not particularly limited. For example, oxygen or the like can be preferably used to treat dissolved water by supplementing dissolved oxygen in water to promote the activity of microorganisms.
[0023]
In the present embodiment, a gas containing at least ozone is used as a gas used for water treatment, so that in the case of a lake, water can be decomposed and water to be treated containing livestock manure If so, the suspension can be decomposed, and if it is industrial wastewater, the suspension can be decomposed and decolored. In addition, it is also possible to adjust pH using, for example, carbon dioxide.
[0024]
As an apparatus for realizing the above method, a discharge means capable of discharging in a tangential direction with respect to the bottom surface of the tank is disposed at the lower part of a cylindrical pressurized tank, and the discharge means and the water to be treated are sucked. A gas-liquid mixing reaction apparatus having a structure in which a suction means is connected to and communicated via a to-be-treated water supply path, and a mixing means for mixing gas into the to-be-treated water by an ejector effect is provided in the middle of the to-be-treated water supply path. It can be.
[0025]
In this case as well, a cylindrical atmospheric release tank having an atmospheric pressure is disposed downstream of the pressurized tank, and a discharge means capable of discharging in a tangential direction with respect to the bottom of the tank at the lower part of the atmospheric release tank. The treated water discharged from the upper part of the pressurized tank is discharged from the lower part of the atmospheric release tank in the tangential direction of the tank bottom, and the gas component dissolved in the treated water is made into fine bubbles. The atmosphere release tank may be configured to float upward from the lower part.
[0026]
Further, it is desirable that the discharge means is a discharge nozzle, and a plurality of the discharge nozzles are arranged at predetermined intervals in the circumferential direction of the tank. That is, by using a plurality of discharge nozzles, the water to be treated containing gas can be reliably swirled in the tank in the pressurized tank, and the water to be treated can be treated in a wide range and with a large capacity. The gas can be dissolved, and in the atmosphere release tank, the gas-liquid mixing reaction between the gas and the water to be treated can be performed efficiently while the fine bubbles are suspended for a long time.
[0027]
As described above, the gas-liquid mixing reaction apparatus according to the present embodiment mainly has a pressurized tank, an air release tank, and a discharge nozzle disposed in both tanks, and has a very simple structure. Although it is a compact system, it enables efficient water treatment.
[0028]
In addition, gas is not forcibly fed using a compressor, but is self-priming using the ejector effect, so maintenance and electricity costs are not required, resulting in a large cost reduction. Also, the water level is lowered in the tank. Therefore, there is no need for a level sensor for liquid level management, and maintenance can be facilitated and costs can be reduced. In addition, since it is known that the sensor function does not work if the level sensor is used for liquids with high viscosity or suspended matter, this device, which does not require liquid level management from this point, Therefore, it can be applied to water to be treated containing livestock manure, or water to be treated mainly including industrial wastewater.
[0029]
As described above, the gas-liquid mixing reaction apparatus according to this embodiment does not require management of the water level in the tank, management of the amount of gas to be introduced, and management of the amount of water to be treated. Can also be supported. In addition, since it is a device that does not require complicated facilities and operations, it is possible to reduce the size of the facilities, improve work efficiency, and simplify management.
[0030]
By the way, it is preferable that a discharge nozzle having the same shape as the discharge nozzle is provided above the pressurization tank and the atmosphere release tank, respectively, and further, the tank upper surface and the nozzle tip are separated by a predetermined distance.
[0031]
By adopting such a configuration, when the water to be treated moves upward from below while turning in both tanks, even if the gas that has risen together stays in the upper part of the tank, the water is caught in the water to be treated. Since it is discharged, the gas-liquid mixing reaction can be performed efficiently.
[0032]
As the configuration of the discharge nozzle described above, a plurality of cuts are formed at the tip of a substantially cylindrical pipe body to form a plurality of cut pieces, and each tip of each cut piece is narrowed toward the center of the pipe, Each of the cut pieces may be twisted while making a predetermined angle with respect to the axial direction of the pipe body, and adjacent cut pieces may be overlapped in a predetermined direction with a predetermined interval.
[0033]
That is, in the case of discharging, the water to be treated can be discharged while swirling in the nozzle, and the mixing of the gas and the water to be treated can be promoted in the nozzle, and further by swirling in the tank. In the pressurized tank, the dissolution of gas can be increased, and in the atmospheric release tank, the contact between the fine bubbles and the water to be treated can be increased, and the dissolution and mixing of the gas can be promoted. The gas-liquid mixing reaction efficiency can be further improved.
[0034]
Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings.
[0035]
FIG. 1 is a schematic explanatory view of a gas-liquid mixed reaction apparatus according to the present embodiment, FIG. 2 is an explanatory view in a cross-sectional view of the same gas-liquid mixed reaction apparatus, and FIG. 3 is a diagram of a nozzle used in the same gas-liquid mixed reaction apparatus. A perspective view and FIG. 4 are front views of the nozzle.
[0036]
As shown in FIG. 1, the gas-liquid mixing reaction apparatus according to the present embodiment has a discharge nozzle 2 as a discharge means at a lower portion of a cylindrical pressurized tank 1 with a tip tangential to a tank bottom surface 10. A gas dissolving part which is disposed and communicated with a discharge pump 2 and a pressure pump 3 as a suction means for supplying the water to be treated in a pressurized state via a water supply pipe 4 as a water supply path for water to be treated. A is connected in communication with the pressurized tank 1 via the communication pipe 5, and the discharge nozzle 2 is disposed at the lower portion with the tip tangential to the tank bottom surface 60 in the same manner as the pressurized tank 1. And a gas-liquid mixing part B having a cylindrical atmospheric release tank 6. 7 is a discharge pipe extended from the upper surface of the atmosphere release tank, and 50 is a flow rate adjusting valve provided in the middle of the communication pipe 5. The flow rate adjusting valve 50 can also adjust the pressure in the pressurized tank 1. it can.
[0037]
Further, an ejector 8 is provided as a mixing means in the middle of the water supply pipe 4 of the gas dissolving part A, and a gas containing, for example, ozone is mixed in the water to be treated sucked by the pressure pump 3 by the ejector effect. It is possible.
[0038]
Discharge nozzles 9 having the same shape as the discharge nozzles 2 are provided on the upper surfaces of the pressurized tank 1 and the air release tank 6, respectively, and a predetermined distance from each tank upper surface to the tip of the discharge nozzle 9. Just separated.
[0039]
With this configuration, in the dissolving portion A, the treated water is mixed with gas by the ejector 8, and the treated water mixed with gas is pressurized from the lower part of the pressurized tank 1 in the tank tangential direction. The mixed gas dissolves in the water to be treated as it is discharged in a state and ascends while rotating in the pressurized tank 1.
[0040]
Then, in the gas-liquid mixing part B at the subsequent stage, the water to be treated in which the gas is mixed in the dissolving part A is discharged from the lower part of the atmosphere release tank 6 in the tank tangential direction and into the water to be treated under atmospheric pressure. The dissolved gas is made into fine bubbles, and the fine bubbles are raised in the atmosphere release tank 6 while swirling together with the water to be treated.
[0041]
Therefore, the contact between the microbubbled gas and the water to be treated is increased, and since the gas, particularly the gas containing ozone in this case, the water to be treated can be effectively sterilized and purified.
[0042]
Moreover, the dissolved gas in the pressurized tank 1 and the fine gas bubbles in the atmospheric release tank 6 are discharged from the discharge nozzle 9 while being caught in water even if they stay in the upper part of the tank. Therefore, the gas does not stop in the tank and the efficiency of the gas-liquid mixing reaction can be increased.
[0043]
By the way, a plurality of the above-described discharge nozzles 2 are arranged in the circumferential direction of the tank 1 (6). In the present embodiment, as shown in FIG. In addition, the water to be treated can be discharged in a tangential direction in the same direction with respect to the tank bottom surface 10 (60). Therefore, a stronger swirl flow can be generated.
[0044]
Here, the discharge nozzle 2 and the discharge nozzle 9 used in this embodiment will be described in more detail.
[0045]
In the present embodiment, the discharge nozzle 2 and the discharge nozzle 9 are the same nozzle, and as shown in FIGS. 3 and 4, a plurality of cuts 21 are made at the tip of a substantially cylindrical pipe body 20. A plurality of cut pieces 22 are formed, the respective leading ends of the cut pieces 22 are squeezed toward the center of the pipe, and the cut pieces 22 are twisted while making a predetermined angle with respect to the axial direction of the pipe body 20. Moreover, the adjacent cut pieces 22 are configured to overlap each other at a predetermined interval in a certain direction.
[0046]
The length of the notch 21 is not particularly limited, but is set to a length of ¼ to ３ with respect to the entire length of the pipe body 20. Further, the number of the cut pieces 22 (cuts 21) is not particularly limited, but in the present embodiment, six cut pieces 22 are provided.
[0047]
By using the discharge nozzle 2 and the discharge nozzle 9 configured as described above, during discharge, a swirl force is applied to the water to be treated in the discharge nozzle 2, and the gas mixed by the ejector 8 is easily dissolved in the water to be treated. In addition, it is possible to increase the discharge pressure by narrowing the tip to facilitate turning in the pressurized tank 1 and to promote gas dissolution by turning. On the other hand, at the time of discharge, as described above, even if gas stays in the upper part of both tanks 1 and 6, when the water to be treated is entrained and enters the discharge nozzle 9 having the above-described configuration, When the gas is discharged from the pressurized tank 1, the amount of dissolved gas is not impaired and the gas is discharged from the air release tank 9 Similarly, the water treatment effect is improved by sufficiently bringing the gas to be treated into fine bubbles into contact with the water to be treated in the discharge nozzle 9.
[0048]
In this embodiment, the gas used for the water to be treated includes at least ozone. However, the pH of the water to be treated can be adjusted using carbon dioxide, for example. It can be appropriately selected and used depending on the processing purpose.
[0049]
By the way, even if the discharge nozzle 9 is not provided, water treatment by gas-liquid mixing reaction is possible.
[0050]
For example, as shown in FIG. 5, one end of the communication pipe 4 and the discharge pipe 7 may be directly connected to the upper surfaces of the pressurized tank 1 and the atmosphere release tank 2. In this example, the diameters of the supply pipe 4, the communication pipe 5, and the discharge pipe 7 are different, and the amount of water to be treated and the communication pipe supplied with the diameter of the supply pipe 4 larger than that of the communication pipe 5. The amount of water to be treated discharged through 4 is made different so that the inside of the pressurized tank 1 becomes an atmosphere under high pressure. With this configuration, the formation of fine bubbles when the gas dissolved in the water to be treated under high pressure reaches the atmospheric pressure release tank 6 and becomes atmospheric pressure is promoted.
[0051]
【The invention's effect】
According to the present invention, the following effects occur.
[0052]
(1) In the present invention described in claim 1, gas is mixed in the water to be treated by the ejector effect, and a plurality of gas is disposed in the cylindrical pressurized tank at a predetermined interval in the circumferential direction at the bottom of the tank. discharged from the discharge nozzles set in the tangential direction of the tank bottom, the gas-liquid mixing reactions how the gas Ru is dissolved in the treatment water while moving while turning upward from the lower portion of the pressurizing tank, the discharge The nozzle is formed with a plurality of cuts at the tip of a substantially cylindrical pipe body to form a plurality of cut pieces, each tip of each cut piece is squeezed toward the center of the pipe, and each cut piece is twisting paying careful predetermined angle with respect to the axial direction of the pipe body, moreover, the cut pieces that are adjacent each configured to overlap in a predetermined direction at predetermined intervals That. Therefore, both water to be treated and gas can be mixed without limitation, and versatility is enhanced, and water treatment can be performed with a simple operation and at low cost.
[0053]
(2) In the present invention according to claim 2, a cylindrical atmospheric release tank having an atmospheric pressure is disposed downstream of the pressurization tank, and the water to be treated discharged from the upper part of the pressurization tank, Discharge from the lower part of the atmosphere release tank in the tangential direction of the tank bottom, make the gas component dissolved in the water to be treated into fine bubbles and float the inside of the atmosphere release tank upward from the lower part to The gas was subjected to a gas-liquid mixed reaction. Therefore, it is possible to perform water treatment by gas-liquid mixing reaction at a low cost with a simple operation, and the efficiency of the treatment can be improved.
[0054]
(3) In the present invention described in claim 3, the gas is a gas containing at least ozone. Therefore, even if the water to be treated has a high sterilizing effect and is severely suspended, it can be cleaned.
[0055]
(4) In the gas-liquid mixing reaction apparatus according to the present invention as set forth in claim 4, a plurality of tanks are disposed at a predetermined interval in the circumferential direction of the tank at the lower part of the cylindrical pressurized tank, the discharge nozzle is disposed which enables discharge tangentially Te, thereby communicatively connected through the treated water supply passage and a suction means for sucking the treated water and the discharge nozzle, midway of the water to be treated supply passage Further, in the gas-liquid mixing reaction apparatus provided with mixing means for mixing gas into the water to be treated by an ejector effect , the discharge nozzle is formed by making a plurality of cuts at a tip end of a substantially cylindrical pipe body. And squeeze the tip of each notch piece toward the center of the pipe, twist each notch piece with a predetermined angle with respect to the axial direction of the pipe body, and To cut pieces would configured to overlap in a predetermined direction at predetermined intervals. Therefore, since it becomes a compact and simple device, water treatment at low cost can be performed easily and efficiently.
[0056]
(5) In the present invention according to claim 5, a cylindrical atmospheric release tank having an atmospheric pressure is disposed downstream of the pressurized tank, and a tangent to the bottom of the tank is provided below the atmospheric release tank. Discharge nozzles that can be discharged in the direction are disposed, and the treated water discharged from the upper part of the pressurized tank is discharged from the lower part of the atmospheric release tank in the tangential direction of the tank bottom, and dissolved in the treated water The gas component was made into fine bubbles and configured to float in the atmosphere release tank from the bottom upward. Accordingly, it is possible to provide a gas-liquid mixing reaction apparatus having a compact and simple configuration, and water treatment by gas-liquid mixing reaction can be efficiently performed at low cost, and troublesome operations are not required.
[0058]
(6) In the present invention according to claim 6 , a discharge nozzle having the same shape as the discharge nozzle is provided above each of the pressurized tank and the atmospheric release tank, and a predetermined distance is provided from the tank upper surface to the nozzle tip. Only separated. Therefore, even if the gas stays in the upper part of the tank, the gas-liquid mixing reaction can be performed efficiently because the gas is discharged while being caught in the water to be treated.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view of a gas-liquid mixing reaction apparatus according to the present embodiment.
FIG. 2 is an explanatory view of the same gas-liquid mixing reaction apparatus in a cross-sectional view.
FIG. 3 is a perspective view of a nozzle used in the same gas-liquid mixing reaction apparatus.
FIG. 4 is a front view of the nozzle.
FIG. 5 is an explanatory view showing a modification example of the gas-liquid mixing reaction apparatus.
FIG. 6 is an explanatory view showing a conventional gas-liquid mixing reaction apparatus.
[Explanation of symbols]
A Dissolving part B Gas-liquid mixing part 1 Pressurized tank 2 Discharge nozzle 6 Atmospheric release tank 8 Ejector 9 Discharge nozzle

Claims (6)

Gas is mixed into the water to be treated by the ejector effect and discharged into a cylindrical pressurized tank from a plurality of discharge nozzles arranged at predetermined intervals in the circumferential direction at the bottom of the tank in the tangential direction of the tank bottom. are allowed, in the gas-liquid mixing reactions how the gas Ru is dissolved in the treatment water while moving while turning upward from the bottom of the pressure tank,
The discharge nozzle is formed with a plurality of cuts at the tip of a substantially cylindrical pipe body to form a plurality of cut pieces, and each tip of the cut pieces is squeezed toward the center of the pipe, Gas-liquid mixing characterized in that each is twisted while making a predetermined angle with respect to the axial direction of the pipe body, and the adjacent cut pieces overlap each other at a predetermined interval in a predetermined direction Reaction method.   A cylindrical atmospheric release tank having an atmospheric pressure is disposed at the subsequent stage of the pressurized tank, and the water to be treated discharged from the upper part of the pressurized tank is tangential to the bottom of the tank from the lower part of the atmospheric release tank. The gas component dissolved in the water to be treated is made into fine bubbles and suspended in the atmosphere release tank from the lower part to the upper part to cause the water to be treated and the gas to undergo a gas-liquid mixed reaction. The gas-liquid mixing reaction method according to claim 1.   The gas-liquid mixed reaction method according to claim 1 or 2, wherein the gas is a gas containing at least ozone. The bottom of the cylindrical pressure tank, is plurality disposed at predetermined intervals in the circumferential direction of the tank, it is disposed an ejection nozzles can eject tangentially to the tank bottom, and the discharge nozzle A suction means for sucking water to be treated is connected in communication with the water supply path to be treated, and a mixing means for mixing gas into the water to be treated by an ejector effect is provided in the middle of the water supply path to be treated. In the gas-liquid mixing reactor,
The discharge nozzle is formed with a plurality of cuts at the tip of a substantially cylindrical pipe body to form a plurality of cut pieces, and each tip of the cut pieces is squeezed toward the center of the pipe, A gas-liquid mixing reaction apparatus characterized in that each is twisted while making a predetermined angle with respect to the axial direction of the pipe body, and the adjacent cut pieces are overlapped in a predetermined direction with a predetermined interval. . A cylindrical atmospheric release tank at atmospheric pressure is disposed downstream of the pressurized tank, and a discharge nozzle capable of discharging in a tangential direction with respect to the tank bottom is disposed at the lower part of the atmospheric release tank. The treated water discharged from the upper part of the pressurized tank is discharged from the lower part of the atmosphere release tank in the tangential direction of the tank bottom, and the gas component dissolved in the treated water is made into fine bubbles to form the atmosphere released tank. 5. The gas-liquid mixing reaction apparatus according to claim 4, wherein the gas-liquid mixing reaction apparatus is configured to float inside from below to above.   6. A discharge nozzle having the same shape as the discharge nozzle is provided above the pressurization tank and the atmosphere release tank, respectively, and further, the tank upper surface and the nozzle tip are separated by a predetermined distance. The gas-liquid mixing reactor described in 1.

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