JPH07327547A - Method for supplying oxygen-mixed water and apparatus therefor - Google Patents

Abstract

PURPOSE:To provide a process and apparatus capable or surely and efficiently mixing oxygen into water to supply an oxygen-mixed water having increased dissolved oxygen content. CONSTITUTION:Water and oxygen sucked into a casing 10 by the rotation of a suction pressure impeller 17 are stirred and mixed by the rotation of a stirring impeller 9. The oxygen bubble is finely divided by colliding with opposite side walls of adjacent ridges 9b and the wall surface of a disk 9a, the produced fine oxygen bubbles are sufficiently contacted with water and sufficiently stirred and mixed in water to obtain an oxygen-mixed water having a prescribed dissolved oxygen concentration level. The oxygen-mixed water is transferred to a pressure tank by the rotation of an ejection pressure impeller 8 to again ensure the time for contacting water with oxygen and accelerate the mixing of oxygen into water. An oxygen-mixed water having increased dissolved oxygen concentration can be produced by this process.

Description

Detailed Description of the Invention

[0001]

The present invention is used for supplying oxygen-mixed water with a high level of dissolved oxygen in a facility such as a fish hatchery, live fish transportation, and other business facilities that use water such as seawater and freshwater. A method and an apparatus thereof.

[0002]

2. Description of the Related Art Conventionally, as an oxygen supply device used in the above facilities, there is one disclosed in, for example, Japanese Utility Model Laid-Open No. 2-78064. This device connects a mixing tank equipped with an oxygen supply port to the water intake port of a self-priming pump, connects a pumping pipe to the mixing tank, and connects an oxygen saturation tank to the discharge port of the pump. , A water discharge pipe equipped with this on-off valve is connected to the saturation tank, and water is pumped into the mixing tank by driving the pump and at the same time air is sucked from the oxygen supply port, and the water and the atmosphere are sent to the oxygen saturation tank. Also, it is configured to mix the oxygen in the atmosphere with water by pressurizing it with the discharge pressure of the pump to obtain water with a predetermined dissolved oxygen amount, and send the oxygen in the atmosphere into the water by scratching the water with a water wheel. Compared with the conventional method of supplying oxygen to water by aeration, it is possible to efficiently obtain water with a required amount of dissolved oxygen.

[0003]

However, according to the above-mentioned conventional device, the oxygen in the atmosphere is mixed with water by the pressure in the oxygen saturation tank, so that the water absorption from the pumping pipe is prevented. The amount of dissolved oxygen changes due to the change in the internal pressure of the oxygen saturation tank due to the increase or decrease in the amount or discharge amount to the water discharge pipe, and especially when the water absorption amount or discharge amount is increased, the water in the oxygen saturation tank and the atmosphere are in contact with each other. As a result of shortening the time, the mixing ability of oxygen is lowered and it becomes difficult to obtain water having a target amount of dissolved oxygen.
In order to solve such a problem, it is conceivable to lengthen the water supply path or increase the size of the mixing tank and the oxygen saturation tank, but in this case, the entire apparatus becomes large and the manufacturing cost of the apparatus, As the operating cost rises, new problems such as securing the installation area arise.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to make it possible to mix oxygen with water more reliably and efficiently, and An object of the present invention is to provide a method and an apparatus capable of supplying oxygen-mixed water with a higher level of dissolved oxygen without being affected by an increase / decrease in flowing water pressure or the like or increasing the size of the entire apparatus.

[0005]

In order to achieve the above object, the present invention provides, in claim 1, the water and oxygen sucked into the casing by the operation of the power pump, and is discharged from the supply port through the pressure tank. A method of supplying oxygen-mixed water, comprising a stirring impeller in which a plurality of ridges having a predetermined height extending in the disk radial direction are provided at predetermined intervals in the disk circumferential direction on a disk that is driven by a motor. The water and oxygen sucked into the casing are agitated and mixed by the rotation of the stirring impeller. At that time, oxygen bubbles are drawn from the disk center side between the adjacent ridges of the stirring impeller. The bubbles are sent out toward the outer circumference of the disk by the centrifugal force, and the oxygen bubbles are crushed into fine particles by colliding with the side wall surface of the adjacent ridge and the wall surface of the disk, and the crushed oxygen bubbles and water are mixed. The oxygen bubbles are brought into contact with each other and sufficiently stirred and mixed in water to obtain oxygen-mixed water, and the oxygen-mixed water is further secured in the pressure tank for a time for allowing water and oxygen to come into contact with each other to mix oxygen with water. It is characterized in that oxygen-mixed water having a predetermined dissolved oxygen content is obtained with further promotion.

According to a second aspect of the present invention, a water suction pipe and an oxygen inlet pipe are connected to a water suction port side of a power pump having an impeller, and a discharge pipe is connected to a discharge port side of the power pump. A device for supplying oxygen-mixed water, in which a pressure tank is arranged midway, in which the impeller equipped in the power pump is mounted on and fixed to a support shaft that is driven by a motor, on both the front and back sides or one side of the disc. , A plurality of protrusions having a predetermined height extending in the disc radial direction with a predetermined gap left between the support shaft outer periphery and the disc spindle direction are provided at predetermined intervals in the disc circumferential direction, and water is absorbed by the rotation of the impeller. Water and oxygen are sucked in from the mouth side, and the water and oxygen are stirred and mixed to obtain oxygen-mixed water and discharged from the discharge port, and this oxygen-mixed water is allowed to contact the water in the pressure tank for a period of time. Re-secure and secure oxygen against water With a more accelerate the case, characterized in that to obtain a given dissolved oxygen content of the oxygen mixing water.

Further, according to a third aspect of the present invention, a water suction pipe and an oxygen feeding pipe are connected to a water suction port side of a power pump having a suction pressure impeller, a discharge pressure impeller, and a stirring impeller, and the power pump has A supply device for oxygen-mixed water, wherein a discharge pipe is connected to a discharge port side, and a pressure tank is arranged in the middle of the discharge pipe.
The stirring impeller has a predetermined height extending in the radial direction of the disc, with a predetermined gap between the front and back surfaces or one side of the disc inserted and fixed to the support shaft that is rotated by the drive of the motor, leaving a predetermined gap with the outer circumference of the support shaft. Is provided at predetermined intervals in the circumferential direction of the disc, and the suction pressure impeller is rotated to suck water and oxygen from the water inlet side, and the water and oxygen are rotated by the stirring impeller. While stirring and mixing to obtain oxygen-mixed water, the oxygen-mixed water is discharged from the discharge port by the rotation of the discharge pressure impeller, and this oxygen-mixed water is again contacted with water in the pressure tank for a period of time. It is characterized in that the oxygen-mixed water having a predetermined amount of dissolved oxygen is obtained by ensuring the oxygen content and further promoting the mixing of oxygen with water.

[0008]

According to the method and apparatus of the present invention, the oxygen sucked into the pump is crushed into fine particles by colliding the side wall surfaces of the adjoining ridges and the wall surface of the disk, and the crushed oxygen bubbles. And water are sufficiently contacted, and the bubbles of oxygen are sufficiently stirred and mixed in water to obtain oxygen-mixed water having a predetermined level of dissolved oxygen, and this oxygen-mixed water is brought into contact with water in the pressure tank. The time is secured again to further promote the mixing of oxygen with water, and oxygen-mixed water having a high level of dissolved oxygen is obtained. Therefore, it is possible to mix oxygen with water more reliably and efficiently, and there is no need to increase or decrease the amount of flowing water or flowing water pressure in the flowing water path, or to increase the size of the entire device. The above-described object of supplying oxygen-mixed water in an oxygen amount can be achieved.

Further, in the apparatus according to the second aspect, water and oxygen are sucked from the water inlet by a single impeller, and the water and oxygen are stirred and mixed to obtain oxygen mixed water, and the oxygen mixed water is further added. Is discharged from the discharge port, the intended purpose can be achieved by a more compact device.

Further, in the apparatus according to claim 3, suction and stirring of suction and stirring of water and oxygen, stirring, mixing, and discharge of water and oxygen,
Since it is carried out by each dedicated impeller for discharge, it is preferably used when the amount of flowing water (the amount of water passing through the device) is relatively large.

The apparatus according to claim 2 is preferably used when the amount of flowing water (the amount of water passing through the device) is relatively small.

[0012]

EXAMPLES Examples will be described below. In FIG. 1, a water suction pipe 2 and an oxygen inlet pipe 3 are connected to a water suction port 1a side of a power pump 1 having three impellers, and a discharge pipe 4 is connected to a discharge port 1b side of the power pump 1. Then, a pressure tank 5 and an on-off valve 6 are arranged on the discharge pipe 4 in this order from the pump 1 side, and the three impellers are the suction pressure impeller 7, the discharge pressure impeller 8, and the stirring impeller 9. Is an oxygen supply device.

In the power pump 1, a water inlet 1a is opened at an arbitrary position in the casing 10 to connect the water inlet pipe 2, and a water outlet 1b is opened at a position opposite to the water inlet 1a to form a discharge pipe 4. The oxygen inlet pipe 3 is connected to the water intake pipe 2a in front of the water intake port 1a, and the inside of the casing 10 is divided into three chambers from the water intake port 1a side to the discharge port 1b side to sequentially from the water intake port 1a side. A water absorption chamber 11, a stirring chamber 12, and a discharge chamber 13 are provided, and the chambers 11, 12, and 13 are communicated with each other through communication ports 14 and 15, respectively. A suction pressure impeller 7 is installed in the water absorption chamber 11 and a stirring chamber 12
An impeller 9 for stirring is provided in the discharge chamber 13, and a pressure impeller 8 for discharge is provided in the discharge chamber 13, and the respective impellers 7, 8, 9 are provided.
Is fitted and fixed to a support shaft 16 which is rotatably supported so as to traverse the chambers 11, 12, 13 and one end of the support shaft 16 is connected to a motor M installed outside the casing 10. The rotation of the suction pressure impeller 7 driven by the motor M causes water and oxygen to be sucked from the water inlet 1a, and the stirring impeller 9
The water and oxygen are agitated and mixed by the rotation of to obtain oxygen mixed water, and the oxygen mixed water is further discharged from the discharge port 1b by the rotation of the discharge pressure impeller 8.

Pressure impeller 7 for suction, pressure impeller 8 for discharge
As shown in an enlarged scale in FIG. 2, is an impeller of a well-known structure such as a swirl type, a mixed flow type, and a mixed flow type (the swirl type is shown in the drawing). It is fixedly attached and supported so as to rotate integrally with the support shaft 16.

As shown in the enlarged view of FIG. 2, the stirring impeller 9 has the outer circumference of the support shaft 16 on both front and back surfaces (both left and right in the drawing) of a disk 9a in which the support shaft 16 is inserted and fixed in the center. A plurality of ridges 9b having a predetermined height extending in the radial direction of the disk 9a are provided at predetermined intervals in the circumferential direction of the disk 9a, leaving a predetermined gap S between them. By the rotation, the oxygen fed into the stirring chamber 12 is crushed into fine particles by colliding the side walls of the adjacent ridges 9b, 9b which face each other and the front wall surface or the back wall surface of the disk 9a, and the crushed oxygen bubbles. And water are sufficiently brought into contact with each other, and the bubbles of oxygen are sufficiently stirred and mixed in water to obtain oxygen-mixed water having a predetermined amount of dissolved oxygen.

The motor M is disposed outside the casing 10, and the rotation of the support shaft 16 driven by the motor M causes the suction pressure impeller 7, the stirring impeller 9, and the discharge pressure impeller 8 to be rotated. Is configured to rotate integrally with each other at a predetermined rotation speed.

The oxygen inlet pipe 3 is connected to a water absorption pipe 2 from a pure oxygen supply source (not shown), and a manual or electric supply stop valve 3a and supply amount control valve ( (Not shown), etc. are provided to enable the supply and stoppage of oxygen and to adjust the supply amount.

The discharge pipe 4 is for supplying the oxygen-mixed water to a predetermined facility (eg, a hatching tank, a fish pond, a live fish carrier, etc.), and a middle portion thereof in order from the power pump 1 side. A pressure tank 5 and an opening / closing valve 6 are provided. The pressure tank 5 obtains the oxygen-mixed water obtained by the rotation of the stirring impeller 9 and is discharged by the discharge pressure impeller 8 in the pressure tank 5 again to secure a time for the water and oxygen to come into contact with each other. It is for further promoting the mixing of oxygen with respect to. The on-off valve 6 is a valve for supplying or stopping the supply of the oxygen-mixed water to the predetermined facility, and opens and supplies the supply, and closes and stops the supply. In the figure, 2'is a water supply source provided at the base end of the water suction pipe 2.

According to the above configuration, the suction pressure impeller 7
Rotation of water feeds water and oxygen from the casing 1
The oxygen is sucked into the inside, and the oxygen is stirred and mixed by the rotation of the stirring impeller 9. At that time, the stirring impeller 9
In this case, the oxygen bubbles are drawn between the adjacent ridges 9b and 9b in the disk 9a from the central gap S of the disk 9a, and the bubbles are sent to the outer peripheral direction of the disk 9a by the rotational centrifugal force, and the oxygen bubbles are adjacent to each other. Side wall surfaces 9b-1 and 9b of 9 and 9b facing each other
b-1 collides with the front wall surface 9a-1 or the back wall surface 9a-2 of the disk 9a and finely crushes them, and the crushed oxygen bubbles and water are sufficiently brought into contact with each other and the oxygen bubbles are sufficiently stirred in water. , To obtain oxygen-mixed water with a predetermined level of dissolved oxygen. Further, this oxygen-mixed water is sent to the discharge pipe 4 by the rotation of the discharge pressure impeller 8, and the time for the water and oxygen to come into contact with each other in the pressure tank 5 provided in the middle of the discharge pipe 4 is secured again to mix oxygen with water. By further promoting the above, it is possible to obtain oxygen-mixed water having an extremely high level of dissolved oxygen.

In Table 1, the oxygen-mixed water obtained using the apparatus of this embodiment shown in FIGS. 1 and 2 and the oxygen-mixed water obtained using the conventional apparatus described in the section of the prior art are shown. The measurement results of the dissolved oxygen amount (DO value) and the nitrogen gas content of each of the above are shown. Water temperature of used water, PH value, amount of water passing through the device,
Various conditions such as room temperature are also shown in the table.

[0021]

[Table 1]

From the above results, while the dissolved oxygen content of the oxygen-mixed water obtained by using the conventional apparatus is 9.45 ppm,
The dissolved oxygen content of the oxygen-mixed water obtained by using the apparatus of this example was 27.17 ppm, which was about three times the numerical value, which was confirmed to be extremely useful as water for fish farming. At the same time, it was also confirmed that the amount of nitrogen gas, which is an unfavorable existence for the survival of seafood, is reduced.

To give an example of a specific dimensional relationship in the impeller 9 for stirring used in the above-mentioned embodiment, the diameter of the disk 9a is given.
The length of the ridge 9b is 30 mm and the thickness of the ridge 9b is 3 mm.
Height of ridge 9b is 5mm, distance between adjacent ridges 9b, 9b
5 mm, the number of ridges 9b provided on one side of the disk 9a is 40 (ie, 80 on both sides). The diameter of the disk 9a and the ridge 9b
The length, thickness, height, distance between adjacent ridges 9b, 9b, the number of ridges 9b provided on one side of the disk 9a, etc., are the dissolved oxygen amount of the oxygen-mixed water to be obtained, the flowing water amount (apparatus Flow rate), the performance of the motor M, the conditions of the site where the device is installed, etc.
It is set appropriately.

In FIG. 3, one side (on the left side in the drawing) of the disk 9a having a support shaft 16 rotatably supported in the stirring chamber 12 and rotated by the drive of the motor M is inserted and fixed in the center portion. , A plurality of ridges 9b having a predetermined height extending in the radial direction of the disk 9a with a predetermined gap S left between the support shaft 16 and the outer periphery of the support shaft 16 are provided at predetermined intervals in the circumferential direction of the disk 9a. car
Shows 20. Even when using this stirring impeller 20, the stirring chamber
Oxygen sent into 12 is crushed finely by colliding the side walls 9b-1 and 9b-1 of the adjacent ridges 9b and 9b, which face each other, and the front wall 9a-1 of the disk 9a, and finely crushed oxygen. The oxygen-mixed water having a predetermined amount of dissolved oxygen can be obtained by sufficiently bringing the bubbles and the water into contact with each other and sufficiently stirring and mixing the bubbles of oxygen in water.

In FIG. 4, the water suction pipe 2 and the oxygen inlet pipe 3 are connected to the water suction port 30a side of the power pump 30 having one impeller, and the discharge pipe is connected to the discharge port 30b side of the power pump 30. 4, the pressure tank 5 and the opening / closing valve 6 are arranged on the discharge pipe 4 in this order from the pump 30 side, and the one impeller is configured in the same manner as the stirring impeller 9 in the above-described embodiment. The oxygen supply device which is an impeller 9'for suction, discharge and stirring is shown.

The power pump 30 of this embodiment is a casing
A suction port 30a is opened at an arbitrary position in 31 and the suction pipe 2
The discharge port 30b at the location facing the water suction port 30a.
Is connected to the discharge pipe 4, a connection port 2a is opened at a position in front of the power pump 30 in the water absorption pipe 2 to connect the oxygen inlet pipe 3, and the inside of the casing 31 for suction and discharge. , An impeller 9'also used for stirring is provided, water and oxygen are sucked from the water inlet 30a by the rotation of the impeller 9 ', and the water and oxygen are stirred and mixed to obtain oxygen-mixed water, Further, the oxygen-mixed water is discharged from the discharge port 30b.

The impeller 9'has the same structure as the stirring impeller 9 in the above-described embodiment, that is, a central portion of a support shaft 32 rotatably supported so as to traverse the casing 31 and rotated by the drive of the motor M. The disc 9a inserted and fixed in the disc 9a has a predetermined gap S between the outer periphery of the support shaft 32 and the outer surface of the disc 9a.
A plurality of ridges 9b having a predetermined height extending in the radial direction of 9a are provided at predetermined intervals in the circumferential direction of the disk 9a. The rotation of the impeller 9'reduces the oxygen sucked into the casing 31. Side wall surfaces 9b-1 and 9b of the adjacent ridges 9b and 9b facing each other
b-1 collides with the front wall surface 9a-1 or the back wall surface 9a-2 of the disk 9a and finely crushes them, and the crushed oxygen bubbles and water are brought into close contact with each other and the oxygen bubbles are sufficiently stirred in water. By mixing, oxygen-mixed water with a predetermined dissolved oxygen content can be obtained. The motor M is arranged outside the casing 31, and the impeller 9 ′ is rotated at a predetermined rotation speed by the rotation of the support shaft 32 due to the driving of the motor M.

The oxygen inlet pipe 3 is connected to a water absorption pipe 2 from a pure oxygen supply source (not shown), but a manual or electric supply stop valve 3a and a supply amount control valve (not shown) are connected to the connection port 2a. (Shown in the figure) and the like are provided so that the supply of oxygen, the stop of supply, etc. can be performed, and the supply amount can be adjusted.

The discharge pipe 4 is used to supply oxygen-mixed water to a predetermined facility (eg, a hatching tank, a fish pond, a live fish carrier, etc.), and a power pump 30 side in the middle thereof in order. A pressure tank 5 and an opening / closing valve 6 are provided. The pressure tank 5 is for further ensuring the time for the oxygen-mixed water obtained by the rotation of the impeller 9 ′ to come into contact with water in the pressure tank 5 to further promote the mixing of oxygen with water. is there. The on-off valve 6 is a valve for supplying or stopping the supply of oxygen-mixed water to the predetermined facility,
Open and supply, close and stop supply.

According to the above construction, water and oxygen are sucked into the casing 31 from the water inlet 1a by the rotation of the impeller 9 ', and the oxygen is agitated by the rotation of the impeller 9'.
Let it mix. At that time, oxygen bubbles are drawn between the adjacent ridges 9b, 9b in the impeller 9'from the gap S on the center side of the disc 9a, and the bubbles are sent to the outer circumferential direction of the disc 9a by the centrifugal force of the rotation. Oxygen crushed by crushing bubbles into finely crushed side walls 9b-1 and 9b-1 of adjacent ridges 9b and 9b facing each other and the front wall surface 9a-1 or back wall surface 9a-2 of the disk 9a. The bubbles of water and the water are thoroughly contacted and the bubbles of oxygen are sufficiently stirred and mixed in water to obtain oxygen-mixed water having a predetermined level of dissolved oxygen. Further, this oxygen-mixed water is sent to the discharge pipe 4 by the rotation of the impeller 9 ', and the time for the water and oxygen to contact with each other in the pressure tank 5 provided in the middle of the discharge pipe 4 is secured again to further mix oxygen with water. With the promotion, an oxygen-mixed water having an extremely high level of dissolved oxygen can be obtained.

The apparatus of this embodiment is used when suction (water absorption), agitation, and discharge are performed by one impeller 9'as described above. Although suitable, the same effect as that of the above embodiment can be obtained at the level of the dissolved oxygen amount.

FIG. 5 shows a modification of the power pump in the apparatus shown in FIG. That is, the power pump 1'in this embodiment divides the inside of the casing 40 into three chambers from the side of the water inlet 1a to the side of the outlet 1b to form a water absorption chamber 41, a stirring chamber 42, and a discharge chamber 43 in order from the water inlet 1a side. , Each room
Communication ports 44 and 45 are opened in the partition walls that divide 41, 42 and 43, respectively, and a suction pressure impeller 7 is provided in the water absorption chamber 41, a stirring impeller 9 is provided in the stirring chamber 42, and a discharge chamber 43 is provided in the discharge chamber 43. Each has a pressure impeller 8 for discharge, and the suction port 1a is rotated by the rotation of the pressure impeller 7 for suction.
Water and oxygen are sucked from the water, and the water and oxygen are stirred and mixed by the rotation of the stirring impeller 9 to obtain oxygen-mixed water,
Further, the oxygen mixed water is discharged from the discharge port 1b by the rotation of the discharge pressure impeller 8.

The suction pressure impeller 7, the discharge pressure impeller 8 and the stirring impeller 9 have the same configurations as described above, but as shown in FIG. 5, the water absorption chamber 41, the stirring chamber 42, and the discharge chamber 41 Chamber 43
A spindle that is rotatably installed vertically and is rotated by the drive of a motor M
46, 47 and 48 are inserted and fixed in the central portion and supported so as to rotate integrally with the support shafts 46, 47 and 48.

The motor M is disposed outside the casing 40, and the rotation of the support shafts 46, 47, 48 by the drive of the motor M causes the suction pressure impeller 7, the stirring impeller 9, and the discharge pressure impeller 8 to rotate.
Is configured to rotate integrally with each other at a predetermined rotation speed l.

According to the above construction, the same function and effect as those of the embodiment shown in FIG. 1, that is, the rotation of the suction pressure impeller 7 sucks water and oxygen into the casing 40, and the oxygen is agitated by the stirring impeller 9. Stir and mix by rotation, at that time
Oxygen bubbles are crushed finely by colliding the side walls of the adjacent ridges 9c, 9c which face each other and the front wall surface or the back wall surface of the disk 9b, and the crushed oxygen bubbles and water are sufficiently brought into contact with each other. The bubbles of oxygen are thoroughly stirred and mixed in water to obtain oxygen-mixed water having a predetermined level of dissolved oxygen. Further, this oxygen-mixed water is sent to the discharge pipe 4 by the rotation of the discharge pressure impeller 8, and the time for the water and oxygen to come into contact with each other in the mixing tank 5 provided in the middle of the discharge pipe 4 is secured again to mix oxygen with water. By further promoting the above, it is possible to obtain oxygen-mixed water having an extremely high level of dissolved oxygen.

Further, in this embodiment, a drive motor for the suction pressure impeller 7 and the discharge pressure impeller 8 and a drive motor for the stirring impeller 9 are individually provided, and the suction pressure impeller is provided. 7 and the rotation of the discharge pressure impeller 8 and the rotation of the stirring impeller 9 are separately controllable, the water absorption amount (discharge amount) and the dissolved oxygen amount are independently increased / decreased. can do.

FIG. 6 shows a modification of the power pump in the apparatus shown in FIG. That is, in the power pump 30 'in this embodiment, a support shaft 51 which is rotated by the drive of the motor M is rotatably provided vertically in the casing 50, and the impeller 9'is inserted into the center of the support shaft 51. It is fixed.

Also in this embodiment, the same effect as that of the device shown in FIG. 4, that is, the rotation of the impeller 9'sucks water and oxygen into the casing 50 and causes the bubbles of oxygen to adjoin each other. 9c, 9c side wall and disk facing each other
9b is crushed finely by colliding with the front wall surface or the back wall surface of 9b, the crushed oxygen bubbles and water are brought into close contact with each other, and the oxygen bubbles are sufficiently stirred and mixed in water to obtain a predetermined level of dissolved oxygen amount. Oxygen-mixed water is obtained, and this oxygen-mixed water is further sent to the discharge pipe 4, and the time for contact between water and oxygen is again secured in the mixing tank 5 provided in the middle of the discharge pipe 4 to further promote the mixing of oxygen with water. Thus, it is possible to obtain oxygen-mixed water having an extremely high level of dissolved oxygen.

In the apparatus shown in FIGS. 1 and 5, it is preferable to use the stirring impeller 9 having the protrusions 9b on both the front and back surfaces of the disk 9a because the amount of flowing water is large. Since the amount of flowing water is small in the device shown in FIG. 6, almost the same effect can be obtained by using either the impeller 9 ′ having the protrusions 9b on both front and back surfaces or the impeller 20 having the protrusions 9b on both front and back surfaces. It was confirmed that

Further, the explanation of the apparatus of each embodiment shown in FIGS. 1 to 6 will be made as the explanation of the embodiment of the method of the present invention according to claim 1. However, for example, in the embodiment shown in FIG. 1 or 5, the position of the stirring impeller is arranged before the suction pressure impeller or after the discharge pressure impeller, or in FIG. 1, FIG. 4, FIG. In each embodiment shown in FIG. 6, changes such as providing a plurality of respective impellers are arbitrary, and they are appropriately selected according to the water supply amount and the dissolved oxygen amount required in the equipment used.

[0041]

As described above, the method and apparatus for supplying oxygen-mixed water according to the present invention absorbs oxygen sucked into the casing from the side walls of the agitating impeller which are adjacent to each other and the wall surfaces of the disk. And crush it into small pieces,
The pulverized oxygen bubbles were brought into close contact with water, and the oxygen bubbles were sufficiently stirred and mixed in water to obtain water having a predetermined dissolved oxygen amount. Compared with the method of mixing the oxygen in the water with water, the mixing of oxygen with water becomes more reliable and more efficient, and it depends on the increase and decrease of the flowing water amount and flowing water pressure in the flowing water path, etc. Oxygen-mixed water having a higher level of dissolved oxygen can be obtained without such a need.

According to the apparatus described in claim 2,
Since a single impeller obtains the functions of suction, stirring, and discharge to obtain oxygen-mixed water having a predetermined amount of dissolved oxygen, the above effect can be achieved by a more compact device.

According to the apparatus described in claim 3,
Since the suction impeller, the stirring impeller, and the discharge impeller are individually provided, they are suitable for use in, for example, fish farms and other facilities that require a large amount of oxygen-mixed water.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the suction pressure impeller, the discharge pressure impeller, and the stirring impeller shown in FIG.

FIG. 3 is a perspective view showing another example of a stirring impeller.

FIG. 4 is a vertical sectional front view showing another embodiment of the present invention.

FIG. 5 is a vertical sectional front view showing another embodiment of the present invention.

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

[Explanation of symbols]

1, 1 ', 30, 30': Power pump 2: Water absorption pipe 3: Oxygen inlet pipe 4: Discharge pipe 5: Pressure tank 7: Pressure impeller for suction 8: Pressure impeller for discharge 9,20: For stirring Impeller 9a: Spindle 9b: Disk 9c: Ridge S: Gap M: Motor 9 ': Impeller for suction, stirring, and discharge

Claims (3)

[Claims] 1. A method of supplying oxygen-mixed water in which water and oxygen sucked into a casing by the operation of a power pump are discharged from a supply port through a pressure tank, the disk being rotated by a motor. A stirring impeller provided with a plurality of ridges of a predetermined height extending in the radial direction at predetermined intervals in the disk circumferential direction is provided, and water and oxygen sucked into the casing are stirred by rotation of the stirring impeller. , Mixing, at that time, the bubbles of oxygen are drawn from the center side of the disc between the adjacent protrusions of the impeller for stirring, and the bubbles are sent out toward the outer periphery of the disc by the centrifugal force, and the bubbles of the oxygen are arranged next to each other. Collide with the side wall surface of the ridge and the wall surface of the disk to finely pulverize, sufficiently contact the pulverized oxygen bubbles with water, and sufficiently stir the oxygen bubbles in water,
Oxygen-mixed water having a predetermined dissolved oxygen content is obtained by further mixing the oxygen-mixed water to obtain oxygen-mixed water and further securing the time for the water and oxygen to come into contact with each other in the pressure tank to further promote the mixing of oxygen with water. And a method for supplying oxygen-mixed water. 2. A water suction pipe and an oxygen inlet pipe are connected to a water suction port side of a power pump having an impeller, and a discharge pipe is connected to a discharge port side of the power pump, and a pressure is applied to a middle portion of the discharge pipe. A device for supplying oxygen-mixed water having a tank, wherein an impeller equipped in the power pump is mounted on and fixed to a support shaft that is rotated by driving a motor, on both front and back surfaces, or on one side,
A plurality of protrusions having a predetermined height extending in the disc radial direction with a predetermined gap left between the support shaft outer periphery and a plurality of protrusions are provided at predetermined intervals in the disc circumferential direction, and the water suction port is provided by rotation of the impeller. The water and oxygen are sucked in from the side, and the water and oxygen are stirred and mixed to obtain oxygen-mixed water and discharged from the discharge port, and this oxygen-mixed water is again contacted with water in the pressure tank for a period of time. An oxygen-mixed water supply device, characterized in that the oxygen-mixed water having a predetermined amount of dissolved oxygen is obtained while securing the oxygen content and further promoting the mixing of oxygen with water. 3. A water suction pipe and an oxygen inlet pipe are connected to a water suction port side of a power pump having a suction pressure impeller, a discharge pressure impeller and an agitation impeller, and the power pump discharge port side is connected to the power pump discharge port side. A supply device for oxygen-mixed water, wherein a discharge tank is connected, and a pressure tank is provided in the middle of the discharge pipe, wherein the stirring impeller is a disk that is fixedly inserted and fixed to a spindle that is driven by a motor. On both front and back surfaces or on one side, a plurality of ridges with a predetermined height extending in the disk radial direction with a predetermined gap left between the support shaft outer periphery and a predetermined height in the disk circumferential direction are provided at predetermined intervals for suction. Water and oxygen are sucked from the water inlet side by the rotation of the pressure impeller, the water and oxygen are stirred and mixed by the rotation of the stirring impeller to obtain oxygen mixed water, and the oxygen mixed water is discharged for pressure impeller. The oxygen is discharged from the discharge port by the rotation of An oxygen mixture characterized in that the mixed water is provided with a predetermined dissolved oxygen amount by further securing the time for the water and oxygen to come into contact with each other in the pressure tank to further promote the mixing of oxygen with water. Water supply device.