WO2023157060A1

WO2023157060A1 - Rearing water purification system and piping purification device

Info

Publication number: WO2023157060A1
Application number: PCT/JP2022/005875
Authority: WO
Inventors: 禎司齊藤; 清治野田; 幸大栗原; 惠裕中山
Original assignee: 三菱電機株式会社
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2023-08-24
Also published as: JP7130176B1; JPWO2023157060A1

Abstract

A rearing water purification system (1) comprises a water tank (10), water discharge piping (21), and a piping purification device (30). The water discharge piping (21) includes an opening end (21a) that is connected to a water discharge aperture (16) of the water tank (10). The piping purification device (30) is provided with a water introduction aperture (30a), a gas introduction aperture (30b), and a discharge aperture (30c). The piping purification device (30) includes a gas bubble-infused water generator (32). The gas bubble-infused water generator (32) generates gas bubble-infused water from the water that was introduced from the water introduction aperture (30a) and the gas that was introduced from the gas introduction aperture (30b). The gas bubble-infused water is discharged from the discharge aperture (30c). The discharge aperture (30c) is connected to the opening end (21a).

Description

Breeding water purification system and pipe purification device

The present disclosure relates to a breeding water purification system and a pipe purification device.

Japanese Patent Application Laid-Open No. 2020-68777 (Patent Document 1) discloses a breeding apparatus for aquatic organisms. This breeding apparatus for aquatic organisms includes a water tank for containing water and aquatic organisms, a filtering device for filtering water discharged from the water tank, and a drainage pipe connected to the water tank and the filtering device. The water in the aquarium is contaminated with leftover food, feces of aquatic organisms such as fish, and algae. Filters remove this dirt.

JP 2020-68777 A

In the apparatus for breeding aquatic organisms disclosed in Patent Document 1, dirt in the water in the aquarium accumulates in the drainage pipe connected to the aquarium and the filtering device. The present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a breeding water purification system and a pipe purification device that can reduce dirt adhering to drainage pipes connected to the drain port of an aquarium. to provide.

The breeding water purification system of the present disclosure includes a water tank, a drainage pipe, and a pipe purification device. The aquarium contains breeding water. A drain is provided in the tank. The drain line includes an open end connected to the drain of the aquarium. A pipe purification device is provided with a water inlet, a gas inlet, and an outlet. A plumbing purification system includes an aerated water supply system. The aerated water supply device includes an aerated water generator. The bubbly water generator generates bubbly water from water introduced from the water inlet and gas introduced from the gas inlet. Aerated water is discharged from the outlet. The outlet of the pipe clarifier is connected to the open end of the drain pipe.

The pipe cleaning device of the present disclosure is connected to the open end of the drainage pipe that is connected to the drain port of the aquarium containing the breeding water. A pipe cleaning system comprises an aerated water supply system. A pipe purification device is provided with a water inlet, a gas inlet, and an outlet. The aerated water supply device includes an aerated water generator. The bubbly water generator generates bubbly water from water introduced from the water inlet and gas introduced from the gas inlet. The aerated water is discharged from the outlet of the pipe cleaning device connected to the open end of the drain pipe.

In the breeding water purification system and the pipe purification device of the present embodiment, dirt adhering to the inner surface of the drainage pipe due to the breeding water flowing through the drainage pipe is removed by air bubbles contained in the bubbly water. Therefore, it is possible to reduce or eliminate dirt adhering to the drain pipe.

1 is a schematic diagram of a breeding water purification system according to Embodiment 1; FIG. FIG. 2 is a schematic partial enlarged view of region II shown in FIG. 1 of the breeding water purification system of Embodiment 1, and a schematic enlarged view of the pipe purification apparatus of Embodiment 1; 1 is a schematic diagram of an aerated water generator of Embodiment 1. FIG. FIG. 4 is a schematic enlarged view of a pipe purification device of a modified example of Embodiment 1; FIG. 3 is a schematic cross-sectional view of the breeding water purification system of Embodiment 1 taken along the cross-sectional line VV shown in FIG. 2; FIG. 4 is a schematic diagram of a breeding water purification system according to Embodiment 2; FIG. 10 is a schematic diagram of a breeding water purification system according to Embodiment 3; FIG. 8 is a schematic partially enlarged view of region VIII shown in FIG. 7 of the breeding water purification system of Embodiment 3; FIG. 9 is a schematic cross-sectional view of the breeding water purification system of Embodiment 3 taken along the cross-sectional line IX-IX shown in FIG. 8;

An embodiment of the present disclosure will be described below. In addition, the same reference numerals are given to the same configurations, and the description thereof will not be repeated.

Embodiment 1.
A breeding water purification system 1 according to a first embodiment will be described with reference to FIGS. 1 to 5. FIG. Referring to FIG. 1, a breeding water purification system 1 includes a water tank 10, a circulation pipe 20, a filter device 24, a water introduction pipe 40, a gas introduction pipe 45, a pipe purification device 30, and

pumps

23 and 25. and a pipe 26 .

The water tank 10 accommodates aquatic organisms such as fish and breeding water 14 for breeding the aquatic organisms. Water tank 10 includes a bottom wall 11 and side walls 12 . The water tank 10 is provided with a drain port 16 and a water supply port 17. - 特許庁The water supply port 17 is positioned above the water discharge port 16 . For example, the drain port 16 is provided on the bottom wall 11 of the water tank 10 and the water supply port 17 is provided on the side wall 12 of the water tank 10 . The water supply port 17 is formed, for example, in the upper half region of the side wall 12 in the height direction of the water tub 10 (the direction in which the side wall 12 rises from the bottom wall 11).

A circulation pipe 20 is attached to the water tank 10 . A filtering device 24 is provided in the circulation pipe 20 .

Specifically, the circulation pipe 20 includes a drain pipe 21 and a return water pipe 22. The drain pipe 21 is connected to the drain port 16 of the water tank 10 and the filtering device 24 . The drain pipe 21 includes an open end 21 a connected to the drain port 16 of the aquarium 10 . A pump 23 is provided in the drain pipe 21 . The pump 23 is, for example, a magnet pump. The pump 23 sends the breeding water 14 from the aquarium 10 to the filtering device 24 .

The filtration device 24 includes a filtration membrane (not shown) such as a hollow fiber membrane. The breeding water 14 is contaminated with leftover food, feces of aquatic organisms such as fish, and algae. The filtering device 24 filters the breeding water 14 to separate it into clean water from which dirt in the breeding water 14 has been removed and concentrated water from which dirt in the breeding water 14 has been concentrated. The return water pipe 22 is connected to the filtering device 24 and the water supply port 17 of the water tank 10 . A pump 25 is provided in the return water pipe 22 . Pump 25 is, for example, a magnet pump. The pump 25 sends clean water from the filtering device 24 to the water supply port 17 of the water tank 10 . The pipe 26 is connected to the filtering device 24 . The concentrated water is discharged outside the breeding water purification system 1 through the pipe 26 .

The water introduction pipe 40 includes a water inlet 41 into which the breeding water 14 flows. The water inlet 41 is arranged closer to the water inlet 17 of the water tank 10 than to the water outlet 16 of the water tank 10 . Therefore, less polluted water in the breeding water 14 flows into the water introduction pipe 40 . In the height direction of the water tank 10 (the direction in which the side wall 12 rises from the bottom wall 11), the water inlet 41 is positioned, for example, in the upper half region of the water tank 10. As shown in FIG. Since dirt in the breeding water 14 tends to settle, the dirt in the upper part of the breeding water 14 is less than the dirt in the lower part of the breeding water 14 . Therefore, less polluted water in the breeding water 14 flows into the water introduction pipe 40 from the water inlet 41 .

The gas introduction pipe 45 includes a gas inlet 46 into which gas flows. The gas inlet 46 is located above the surface of the breeding water 14 . The gas inlet 46 may be located above the water tank 10 . The gas includes air, nitrogen gas, oxygen gas or ozone gas, or a combination of at least two of these. Nitrogen gas reduces the concentration of dissolved oxygen in the breeding water 14 and suppresses oxidation of dirt in the breeding water 14 . Oxygen gas increases the dissolved oxygen concentration of the breeding water 14 . The ozone gas sterilizes the breeding water 14 .

1 and 2, the pipe cleaning device 30 is connected to the open end 21a of the drainage pipe 21. As shown in FIG. The pipe purification device 30 is provided with a water inlet 30a, a gas inlet 30b, and an outlet 30c. The water introduction pipe 40 is connected to the water introduction port 30a. Water is introduced through the water inlet pipe 40 and from the water inlet 30a. The gas introduction pipe 45 is connected to the gas introduction port 30b. Gas is introduced from the gas introduction port 30 b through the gas introduction pipe 45 . Bubbly water, which will be described later, is discharged from the discharge port 30c. The pipe cleaning device 30 includes an aerated water supply device 31 and a fixing member 35 .

The bubbly water supply device 31 is made of, for example, metal such as stainless steel (eg, SUS304 or SUS316) or titanium, or vinyl chloride resin, acrylic resin, acrylonitrile butadiene styrene (ABS) resin, or polytetrafluoroethylene tetrafluoride. It is made of resin such as ethylene (PTFE) resin. The aerated water supply device 31 includes an aerated water generator 32 and a water flow converter 33 .

The bubbly water generator 32 generates bubbly water from the gas introduced from the gas inlet 30b and the water introduced from the water inlet 30a. The aerated water generator 32 is, for example, an ejector as shown in FIG. The aerated water generator 32 is provided with a conduit 32r. The conduit 32r includes an inflow port 32a, an intake port 32b, an outflow port 32c, a narrowed portion 32d, and a gas-liquid mixing portion 32e. The constriction 32d is between the inlet 32a and the outlet 32c. The diameter of the conduit 32r gradually decreases from the inlet 32a toward the narrowed portion 32d. The narrowed portion 32d is the portion with the smallest diameter in the conduit 32r. The gas-liquid mixing portion 32e is located between the constricted portion 32d and the outflow port 32c. The intake port 32b communicates with the gas-liquid mixing section 32e. In this embodiment, the inlet port 32a of the bubbly water generator 32 is the water inlet port 30a of the pipe purification device 30, and the inlet port 32b of the bubbly water generator 32 is the gas inlet port 30b of the pipe purification device 30. be.

Water flows in from the inflow port 32a. The flow velocity of water increases in the narrowed portion 32d. Negative pressure is generated in the gas-liquid mixing section 32e by the water passing through the constricted section 32d and flowing into the gas-liquid mixing section 32e (Bernoulli's theorem). Due to this negative pressure, the gas flows into the gas-liquid mixing section 32e from the intake port 32b. In the gas-liquid mixing portion 32e, the water whose flow rate has increased mixes with the gas that has flowed in from the intake port 32b, and bubbles 36 are generated. The bubbles 36 may be, for example, microbubbles with a diameter of 1 μm or more and less than 1 mm, or fine bubbles with a diameter of less than 1 μm. Thus, the bubbly water generator 32 produces bubbly water.

The aerated water generator 32 is not limited to an ejector type, but may be a swirling liquid flow type, a static mixer type, a venturi type, a pressurized dissolution type, a fine hole type, or a steam type. It may be of a condensing type.

The water flow converter 33 is provided with an inlet (not shown) and an outlet (not shown). The water flow converter 33 disturbs the flow of water flowing into the water flow converter 33 . The flow of water flowing out from the outlet of the water flow converter 33 is, for example, turbulent flow or swirling flow. For example, the water flow converter 33 may be a cylindrical member having screw-shaped grooves formed on its inner surface, or a cylindrical member having a propeller or screw blades provided on its inner surface. In this embodiment, the water flow converter 33 is arranged downstream of the aerated water generator 32 . The bubbly water generated by the bubbly water generator 32 flows into the water flow converter 33 . A water flow converter 33 disrupts the flow of aerated water. The water flow converter 33 discharges the disturbed aerated water. In this embodiment, the outlet of the water flow converter 33 is the outlet 30c of the pipe cleaning device 30. As shown in FIG.

In a modification of the present embodiment shown in FIG. 4, the bubbly water generator 32 may be arranged downstream of the water flow converter 33. The water whose flow is disturbed by the water flow converter 33 flows into the bubbly water generator 32 . The aerated water generator 32 discharges the aerated water with disturbed flow. The inlet of the water flow converter 33 is the water inlet 30a of the pipe purification device 30, the inlet of the bubbly water generator 32 is the gas inlet 30b of the pipe purification device 30, and the flow of the bubbly water generator 32 is The outlet is the discharge port 30c of the pipe cleaning device 30 . In this variant, the aerated water generator 32 is, for example, an air diffuser. The air diffuser does not significantly attenuate the water flow turbulence produced by the water flow converter 33 . As such, the air diffuser may be placed downstream of the water flow converter 33 .

2, 4 and 5, the discharge port 30c of the pipe cleaning device 30 is connected to the open end 21a of the drainage pipe 21. As shown in FIG. Specifically, the fixing member 35 fixes the discharge port 30 c of the pipe cleaning device 30 to the open end 21 a of the drainage pipe 21 . The fixing member 35 includes a base 35a and a projection 35b projecting from the base 35a. A through hole 35c is provided in the base 35a and the projection 35b. The outer size (eg, outer diameter) of the base 35a is larger than the outer size (eg, outer diameter) of the projection 35b and the size (eg, diameter of the drain 16) of the drain 16 of the aquarium 10. Base 35 a may contact bottom wall 11 of aquarium 10 . The lower end of the pipe cleaning device 30 (the lower end of the water flow converter 33 in FIG. 2, and the lower end of the bubbly water generator 32 in FIG. 4) is fitted into the through hole 35c provided in the base 35a. The protrusion 35b is fitted to the drain port 16 of the water tank 10 and the open end 21a of the drain pipe 21 .

The drain pipe 21 fluidly communicates with the outlet 30c of the pipe cleaning device 30. The bubbly water flows into the drain pipe 21 through the outlet 30c. The drain pipe 21 fluidly communicates with the space of the aquarium 10 in which the breeding water 14 is stored through the portion 21b of the open end 21a of the drain pipe 21 that is not blocked by the pipe purification device 30 and the projection 35b. The breeding water 14 flows into the drain pipe 21 through the drain port 16 of the water tank 10 and the portion 21b.

The channel of the breeding water 14 toward the open end 21a of the drain pipe 21 and the channel of the bubbly water toward the open end 21a of the drain pipe 21 are separated from each other. Therefore, it is possible to suppress the occurrence of a failure of the aerated water supply device 31, such as clogging of the aerated water supply device 31 due to dirt in the breeding water 14 flowing into the aerated water supply device 31. The outlet 30c of the pipe cleaning device 30 is flush with the open end 21a of the drain pipe 21, for example. The size (eg, diameter D ₂ ) of the outlet 30c of the pipe purification device 30 is smaller than the size (eg, diameter D ₁ ) of the open end 21a of the drain pipe 21 . The size of the outlet 30c of the pipe purification device 30 is, for example, 50% or more of the size of the open end 21a of the drain pipe 21. As shown in FIG. Therefore, the air bubbles 36 contained in the bubbly water are supplied to a wider area of the inner surface of the drain pipe 21 . The size of the outlet 30c of the pipe purification device 30 is, for example, 90% or less of the size of the open end 21a of the drain pipe 21. As shown in FIG.

The operation of the breeding water purification system 1 and the pipe purification device 30 of this embodiment will be described.
The pump 23 sends the breeding water 14 from the drain port 16 of the water tank 10 to the filtering device 24 through the drain pipe 21 . The filtering device 24 filters the breeding water 14 to separate it into clean water from which dirt in the breeding water 14 has been removed and concentrated water from which dirt in the breeding water 14 has been concentrated. The pump 25 sends clean water from the filtering device 24 to the water supply port 17 of the water tank 10 through the return water pipe 22 . The concentrated water is discharged outside the breeding water purification system 1 through the pipe 26 .

The force of the pump 23 sucking the breeding water 14 from the water tank 10 into the drainage pipe 21 causes water to flow from the water inlet 41 into the water introduction pipe 40 . Water flows into the pipe cleaning device 30 from the water inlet 30 a of the pipe cleaning device 30 through the water inlet pipe 40 . The water that flows into the pipe cleaning device 30 is, for example, the water in the upper part of the breeding water 14 that is less polluted than the breeding water 14 . Due to the force of the pump 23 sucking the breeding water 14 from the water tank 10 into the drainage pipe 21 , gas flows from the gas inlet 46 into the gas introduction pipe 45 . The gas flows into the pipe purification device 30 from the gas introduction port 30 b of the pipe purification device 30 through the gas introduction pipe 45 .

The pipe purification device 30 includes a bubbly water supply device 31 . The aerated water supply device 31 includes an aerated water generator 32 and a water flow converter 33 . The bubbly water generator 32 generates bubbly water from the water introduced from the water inlet 30a and the gas introduced from the gas inlet 30b. The aerated water contains air bubbles 36 (see FIG. 3). A water flow converter 33 disrupts the flow of water. The bubbly water whose flow is disturbed by the water flow converter 33 is discharged from the discharge port 30 c of the pipe cleaning device 30 .

The discharge port 30c of the pipe purification device 30 is connected to the open end 21a of the drainage pipe 21. The bubbly water discharged from the outlet 30 c of the pipe cleaning device 30 flows into the drain pipe 21 . The surface area of the bubble 36 is large compared to the volume of the bubble 36 . Moreover, the surfaces of the bubbles 36 are hydrophobic and can adsorb dirt. Dirt adhering to the inner surface of the drain pipe 21 due to the breeding water 14 flowing through the drain pipe 21 is absorbed by the air bubbles 36 and removed.

Since the specific gravity of the air bubbles 36 is lighter than that of water, the air bubbles 36 collect on the upper inner surface of the drainage pipe 21 while the air-bubbled water passes through the drainage pipe 21 and come into contact with the lower inner surface of the drainage pipe 21. tend to disappear. However, bubbly water whose flow is disturbed by the water flow converter 33 is flowing into the drain pipe 21 . The disturbed aerated water contacts not only the upper inner surface of the drain line 21 but also the lower inner surface of the drain line 21 during its passage through the drain line 21 . Dirt adhering to the inner surface of the drain pipe 21 is removed by the air bubbles 36 over a wider area of the inner surface of the drain pipe 21 .

(Modification)
The breeding water purification system 1 may not include the return water pipe 22 , and may include only the drainage pipe 21 instead of the circulation pipe 20 . The water flow converter 33 may be omitted from the pipe purification device 30 . The water inlet 41 of the water introduction pipe 40 may be connected to a water tank (not shown) outside the aquarium 10, and water other than the breeding water 14 (for example, water contained in the water tank) may be The water may flow into the pipe purification device 30 from the water inlet 41 of the water introduction pipe 40 . A pump may be provided in the water introduction pipe 40 to cause water to flow into the water introduction pipe 40 from the water inlet 41 . A pump may be provided in the gas introduction pipe 45 to cause the gas to flow into the gas introduction pipe 45 from the gas inlet 46 .

Effects of the breeding water purification system 1 and the pipe purification device 30 of the present embodiment will be described.
A breeding water purification system 1 of the present embodiment includes a water tank 10 , a drainage pipe 21 , and a pipe purification device 30 . The aquarium 10 contains breeding water 14 . A drain port 16 is provided in the water tank 10 . The drain pipe 21 includes an open end 21 a connected to the drain port 16 of the aquarium 10 . The pipe purification device 30 is provided with a water inlet 30a, a gas inlet 30b, and an outlet 30c. The pipe cleaning device 30 includes an aerated water supply device 31 . The aerated water supply device 31 includes an aerated water generator 32 . The bubbly water generator 32 generates bubbly water from the water introduced from the water inlet 30a and the gas introduced from the gas inlet 30b. The bubbly water is discharged from the discharge port 30c. An outlet 30 c of the pipe cleaning device 30 is connected to the open end 21 a of the drain pipe 21 .

Dirt adhering to the inner surface of the drain pipe 21 due to the breeding water 14 flowing through the drain pipe 21 is removed by the air bubbles 36 contained in the bubbly water. Therefore, dirt adhering to the inner surface of the drain pipe 21 can be reduced or eliminated. Clogging of the drainage pipe 21 due to dirt is prevented, and failure of the breeding water purification system 1 is prevented. The burden of maintenance work for the breeding water purification system 1 is reduced.

In the breeding water purification system 1 of the present embodiment, the bubbly water supply device 31 further includes a water flow converter 33 that disturbs the water flow. The pipe cleaning device 30 discharges the bubbly water whose flow is disturbed by the water flow converter 33 from the discharge port 30c.

Therefore, the air bubbles 36 come into contact with the inner surface of the drainage pipe 21 more vigorously and over a wider area. Dirt adhering to the inner surface of the drain pipe 21 is further removed. Dirt adhering to the drain pipe 21 can be reduced or eliminated.

In the breeding water purification system 1 of the present embodiment, the pipe purification device 30 further includes a fixing member 35 that fixes the discharge port 30c of the pipe purification device 30 to the open end 21a of the drainage pipe 21 .

The fixing member 35 ensures that the bubbly water discharged from the outlet 30c of the pipe cleaning device 30 flows into the drain pipe 21 more reliably. Dirt adhering to the inner surface of the drain pipe 21 can be stably reduced or eliminated.

The breeding water purification system 1 of the present embodiment further includes a filtering device 24 , a return water pipe 22 and a water introduction pipe 40 . The filtering device 24 filters the breeding water 14 and is connected to the drainage pipe 21 . The water inlet pipe 40 is connected to the water inlet port 30a of the pipe cleaning device 30 and includes a water inlet port 41 into which the breeding water 14 flows. The water tank 10 is provided with a water supply port 17 located above the drain port 16 . The return water pipe 22 is connected to the water supply port 17 of the water tank 10 and the filtering device 24 . A water inlet 41 of the water inlet pipe 40 is arranged closer to the water inlet 17 of the water tank 10 than the water outlet 16 of the water tank 10 .

The breeding water purification system 1 includes a drainage pipe 21, a filtering device 24, and a water return pipe 22, so the breeding water 14 is reused. Therefore, the amount of water used as breeding water 14 can be reduced. In addition, less polluted water in the breeding water 14 flows into the pipe purification device 30 from the water inlet 41 of the water introduction pipe 40 . Failure of the aerated water supply device 31, such as clogging of the aerated water supply device 31, can be prevented. Also, since the breeding water 14 is used to generate the bubbly water, the amount of water used to generate the bubbly water can be reduced.

In the breeding water purification system 1 of the present embodiment, the size of the outlet 30c of the pipe purification device 30 is smaller than the size of the open end 21a of the drainage pipe 21.

Therefore, the breeding water 14 and the bubbly water flow into the drainage pipe 21 . Dirt adhering to the inner surface of the drain pipe 21 due to the breeding water 14 flowing through the drain pipe 21 is removed by the air bubbles 36 contained in the bubbly water. Therefore, dirt adhering to the inner surface of the drain pipe 21 can be reduced or eliminated.

In the breeding water purification system 1 of the present embodiment, the discharge port 30c of the pipe purification device 30 is on the same plane as the open end 21a of the drainage pipe 21 .

Therefore, the air bubbles 36 contained in the bubbly water are supplied to a wider area of the inner surface of the drain pipe 21. Dirt adhering to the drain pipe 21 can be reduced or eliminated. Further, the channel of the breeding water 14 toward the open end 21a of the drain pipe 21 and the channel of the bubbly water toward the open end 21a of the drain pipe 21 are separated from each other. Therefore, it is possible to suppress the occurrence of a failure of the aerated water supply device 31, such as clogging of the aerated water supply device 31 due to dirt in the breeding water 14 flowing into the aerated water supply device 31.

The pipe cleaning device 30 of the present embodiment is connected to the open end 21a of the drain pipe 21 connected to the drain port 16 of the aquarium 10 containing the breeding water 14 . The pipe cleaning device 30 includes a bubbly water supply device 31 . The pipe purification device 30 is provided with a water inlet 30a, a gas inlet 30b, and an outlet 30c. The aerated water supply device 31 includes an aerated water generator 32 . The bubbly water generator 32 generates bubbly water from the water introduced from the water inlet 30a and the gas introduced from the gas inlet 30b. The bubbly water is discharged from the discharge port 30c of the pipe cleaning device 30 connected to the open end 21a of the drain pipe 21 .

Dirt adhering to the inner surface of the drain pipe 21 due to the breeding water 14 flowing through the drain pipe 21 is removed by the air bubbles 36 contained in the bubbly water. Therefore, dirt adhering to the drain pipe 21 can be reduced or eliminated. Clogging of the drain pipe 21 due to dirt is prevented. The burden of maintenance work on the drain pipe 21 is reduced.

The pipe purification device 30 of the present embodiment further includes a water flow converter 33 that disturbs water flow. The pipe cleaning device 30 discharges the bubbly water whose flow is disturbed by the water flow converter 33 from the discharge port 30c.

The pipe purification device 30 of the present embodiment further includes a fixing member 35 that fixes the discharge port 30c of the pipe purification device 30 to the open end 21a of the drainage pipe 21 .

Embodiment 2.
A breeding water purification system 1b according to Embodiment 2 will be described with reference to FIG. The breeding water purification system 1b of the present embodiment has the same configuration as the breeding water purification system 1 of the first embodiment, but differs mainly in the following points. The breeding water purification system 1 b further includes a turbidity sensor 50 , a water flow control valve 52 , a gas flow control valve 54 and a controller 56 .

The turbidity sensor 50 detects the turbidity of the breeding water 14 . Turbidity sensor 50 is, for example, an optical turbidity sensor. An optical turbidity sensor includes a light emitting element such as a light emitting diode and a light receiving element such as a photodiode. Light emitted from the light-emitting element passes through the breeding water 14 and enters the light-receiving element. The light emitted from the light emitting elements is scattered or absorbed by dirt contained in the breeding water 14 . The turbidity of the breeding water 14 can be measured from the intensity of light detected by the light receiving element.

The water flow rate adjustment valve 52 is provided on the water introduction pipe 40 . The water flow rate adjustment valve 52 is a valve that adjusts the flow rate of water passing through the water introduction pipe 40 . The water flow control valve 52 is, for example, an electric valve.

The gas flow rate adjustment valve 54 is provided on the gas introduction pipe 45 . The gas flow rate adjustment valve 54 is a valve that adjusts the flow rate of gas passing through the gas introduction pipe 45 . The gas flow control valve 54 is, for example, an electric valve.

The controller 56 is, for example, a microcomputer. The controller 56 is connected to the turbidity sensor 50, the water flow control valve 52, and the gas flow control valve 54 through electrical wiring or the like. Controller 56 receives a turbidity signal regarding the turbidity of breeding water 14 from turbidity sensor 50 . The controller 56 transmits a water flow rate signal corresponding to the turbidity of the breeding water 14 to the water flow rate control valve 52 and transmits a gas flow rate signal corresponding to the turbidity of the breeding water 14 to the gas flow rate control valve 54 .

For example, when the turbidity of the breeding water 14 detected by the turbidity sensor 50 is low, the controller 56 sends a water flow rate signal to the water flow rate adjustment valve 52 to set the water flow rate adjustment valve 52 to a half-open state, and the gas flow rate is A gas flow signal is sent to the gas flow control valve 54 to set the control valve 54 in a half-open state. When the turbidity of the breeding water 14 detected by the turbidity sensor 50 is low, the water flow control valve 52 and the gas flow control valve 54 are half-opened, and the water and gas supplied to the bubbly water supply device 31 decrease. . The bubbly water discharged from the bubbly water supply device 31 is reduced.

On the other hand, when the turbidity of the breeding water 14 detected by the turbidity sensor 50 is high, the controller 56 sends a water flow rate signal to the water flow rate adjustment valve 52 to fully open the water flow rate adjustment valve 52, A gas flow rate signal is sent to the gas flow rate adjustment valve 54 to fully open the gas flow rate adjustment valve 54 . When the turbidity of the breeding water 14 detected by the turbidity sensor 50 is high, the water flow control valve 52 and the gas flow control valve 54 are fully opened, and the amount of water and gas supplied to the bubbly water supply device 31 increases. . The bubbly water discharged from the bubbly water supply device 31 increases.

The water inlet 41 of the water introduction pipe 40 may be positioned near the surface of the breeding water 14 as in the present embodiment. Since the dirt in the breeding water 14 tends to settle, the dirt near the surface of the breeding water 14 is less. Therefore, less polluted water in the breeding water 14 flows into the water introduction pipe 40 . Failure of the aerated water supply device 31, such as clogging of the aerated water supply device 31, can be prevented.

The breeding water purification system 1b of the present embodiment has the following effects in addition to the effects of the breeding water purification system 1 of the first embodiment.

The breeding water purification system 1b of the present embodiment further includes a turbidity sensor 50, a water introduction pipe 40, a water flow rate adjustment valve 52, a gas introduction pipe 45, a gas flow rate adjustment valve 54, and a controller 56. . Turbidity sensor 50 detects the turbidity of breeding water 14 . The water introduction pipe 40 is connected to the water introduction port 30 a of the pipe cleaning device 30 . The water flow control valve 52 is provided on the water introduction pipe 40 . The gas introduction pipe 45 is connected to the gas introduction port 30 b of the pipe cleaning device 30 . A gas flow control valve 54 is provided in the gas introduction pipe 45 . Controller 56 is connected to turbidity sensor 50 , gas flow control valve 54 and water flow control valve 52 .

Therefore, a suitable amount of bubbly water is supplied to the drainage pipe 21 to remove dirt adhering to the drainage pipe 21 . The amount of water and gas used to generate the aerated water is reduced. The service life of the bubbly water supply device 31 is extended, and the burden of maintenance work for the bubbly water supply device 31 is reduced.

Embodiment 3.
A breeding water purification system 1c according to Embodiment 3 will be described with reference to FIGS. 7 to 9. FIG. A breeding water purification system 1c of the present embodiment has a configuration similar to that of the breeding water purification system 1 of Embodiment 1, but differs mainly in the following points. In this embodiment, the pipe cleaning device 30 further includes a supply pipe 38 and a support base 39 .

The supply pipe 38 is a pipe for supplying bubbly water. The supply pipe 38 is, for example, a flexible hose. The supply pipe 38 is connected to the bubbly water supply device 31 and the open end 21 a of the drain pipe 21 . The supply pipe 38 includes an outlet 30 c of the pipe cleaning device 30 . The outflow port of the supply pipe 38 is the discharge port 30 c of the pipe cleaning device 30 . The fixing member 35 fixes the supply pipe 38 to the open end 21 a of the drain pipe 21 . The outflow port of the supply pipe 38 is fitted in the through hole 35 c of the fixing member 35 .

Since the pipe purification device 30 includes a supply pipe 38, the aerated water supply device 31 need not be installed on the bottom wall 11 of the water tank 10, but can be placed outside the water tank 10. For example, the aerated water supply device 31 rests on a support base 39, which is fixed, for example, to the floor of the fish breeder's house.

The breeding water purification system 1c of the present embodiment has the following effects in addition to the effects of the breeding water purification system 1 of the first embodiment.

In the breeding water purification system 1c of the present embodiment, the pipe purification device 30 is connected to the bubbly water supply device 31 and further includes a supply pipe 38 through which the bubbly water flows. The supply pipe 38 includes an outlet 30 c of the pipe cleaning device 30 . The fixing member 35 fixes the supply pipe 38 to the open end 21 a of the drain pipe 21 .

The pipe purification device 30 of the present embodiment further includes a supply pipe 38 connected to the bubbly water supply device 31 and through which the bubbly water flows. The supply pipe 38 includes an outlet 30 c of the pipe cleaning device 30 . The fixing member 35 fixes the supply pipe 38 to the open end 21 a of the drain pipe 21 .

In the breeding water purification system 1c and the pipe purification device 30 of the present embodiment, the supply pipe 38 improves the degree of freedom in installing the bubbly water supply device 31.

Embodiments 1 to 3 disclosed this time and their modifications should be considered as examples in all respects and not restrictive. As long as there is no contradiction, at least two of Embodiments 1 to 3 disclosed this time and their modifications may be combined. The scope of the present disclosure is indicated by the scope of claims rather than the above description, and is intended to include all changes within the meaning and scope of equivalence to the scope of claims.

1, 1b, 1c Breeding water purification system, 10 Water tank, 11 Bottom wall, 12 Side wall, 14 Breeding water, 16 Drain port, 17 Water supply port, 20 Circulation pipe, 21 Drainage pipe, 21a Open end, 21b Part, 22 Return water Piping, 23, 25 Pump, 24 Filtration device, 26 Piping, 30 Piping purification device, 30a Water inlet, 30b Gas inlet, 30c Outlet, 31 Bubbly water supply device, 32 Bubbly water generator, 32a Inlet , 32b inlet, 32c outlet, 32d constriction, 32e gas-liquid mixing section, 32r pipeline, 33 water flow converter, 35 fixing member, 35a base, 35b projection, 35c through hole, 36 air bubble, 38 supply pipe, 39 Support stand, 40 water introduction pipe, 41 water inlet, 45 gas introduction pipe, 46 gas inlet, 50 turbidity sensor, 52 water flow rate adjustment valve, 54 gas flow rate adjustment valve, 56 controller.

Claims

a water tank provided with a drain port and containing breeding water;
a drain pipe including an open end connected to the drain;
and a pipe purification device,
The pipe purification device is provided with a water inlet, a gas inlet, and an outlet,
The pipe purification device includes an aerated water supply device,
The bubbly water supply device includes a bubbly water generator that generates bubbly water from the water introduced from the water inlet and the gas introduced from the gas inlet,
The bubbly water is discharged from the discharge port,
The breeding water purification system, wherein the outlet is connected to the open end.
The aerated water supply device further comprises a water flow converter for disrupting the water flow,
2. The breeding water purification system according to claim 1, wherein said pipe purification device discharges said bubbly water whose flow is disturbed by said water flow converter from said outlet.
The breeding water purification system according to claim 1 or claim 2, wherein the pipe purification device further includes a fixing member that fixes the outlet to the open end.
The pipe purification device further includes a supply pipe connected to the bubbly water supply device and through which the bubbly water flows,
The supply pipe includes the outlet,
4. The breeding water purification system according to claim 3, wherein said fixing member fixes said supply pipe to said open end.
a filtering device that filters the breeding water and is connected to the drainage pipe;
return water piping;
a water inlet pipe connected to the water inlet and including a water inlet into which the breeding water flows;
The water tank is provided with a water supply port located above the drain port,
The return water pipe is connected to the water supply port and the filtering device,
5. The breeding water purification system according to any one of claims 1 to 4, wherein the water inlet of the water introduction pipe is arranged closer to the water supply port than the drain port.
a turbidity sensor that detects turbidity of the breeding water;
a water inlet pipe connected to the water inlet;
a water flow rate adjustment valve provided in the water introduction pipe;
a gas introduction pipe connected to the gas introduction port;
a gas flow control valve provided in the gas introduction pipe;
5. The breeding water purification system according to any one of claims 1 to 4, further comprising a controller connected to said turbidity sensor, said gas flow control valve and said water flow control valve.
The breeding water purification system according to any one of claims 1 to 6, wherein the size of the outlet is smaller than the size of the open end.
The breeding water purification system according to any one of claims 1 to 7, wherein the outlet is flush with the open end.
The breeding according to any one of claims 1 to 8, wherein the gas introduced from the gas inlet is air, nitrogen gas, oxygen gas, ozone gas, or a combination of at least two of them. water purification system.
A pipe purification device connected to an open end of a drainage pipe connected to a drain port of an aquarium containing breeding water, the pipe purification device comprising:
Equipped with an aerated water supply,
The pipe purification device is provided with a water inlet, a gas inlet, and an outlet,
The bubbly water supply device includes a bubbly water generator that generates bubbly water from the water introduced from the water inlet and the gas introduced from the gas inlet,
The pipe purification device, wherein the bubbly water is discharged from the discharge port connected to the open end.
It also has a water flow converter that disturbs the water flow,
11. The pipe purification device according to claim 10, wherein the pipe purification device discharges the bubbly water whose flow is disturbed by the water flow converter from the outlet.
The pipe purification device according to claim 10 or 11, further comprising a fixing member fixing said outlet to said open end.
further comprising a supply pipe connected to the bubbly water supply device and through which the bubbly water flows;
The supply pipe includes the outlet,
13. The pipe purification device according to claim 12, wherein said fixing member fixes said supply pipe to said open end.