An intelligent oxygenated aquaculture water tank for shipborne aquaculture and its oxygenation method

Abstract

The present invention relates to the field of aquaculture technology, and in particular to an intelligent oxygenated aquaculture water tank in a shipboard aquaculture mode and an oxygenation method thereof, comprising an aquaculture water tank body, an oxygen supply device being provided at the bottom of the aquaculture water tank body, a plurality of support pipes rotatably connected to the oxygen supply device, aeration devices being provided at the top of each support pipe and being connected to the support pipe, the aeration device comprising a rotating chamber consisting of a first mesh plate, a second mesh plate and a first annular plate, an aeration chamber consisting of a third mesh plate, a fourth mesh plate and a second annular plate being provided in the rotating chamber, the top of the support pipe being connected to one side of the bottom of the aeration chamber, an air inlet mesh plate being provided above the third mesh plate, the aeration device making full use of the advantages of the water depth of the aquaculture tank and the rotating flow of seawater, dispersing the high-pressure gas produced by the oxygen generator into a large number of tiny bubbles, with a larger distribution area in the horizontal direction, which is conducive to the dissolution of oxygen, and the small bubbles rising slowly, fully contacting with the seawater, and further dissolving the oxygen into the water.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture, and in particular to an intelligent oxygenated aquaculture water tank in a ship-borne aquaculture mode and an oxygenation method thereof. Background Art

[0002] Deep-sea waters have significant advantages such as rich fishery resources, high-quality water sources, suitable water temperature and being away from land-based pollution and diseases. They have excellent conditions for large-scale marine aquaculture and logistics processing and supply, and are a new space for the development of modern aquaculture and marine economy.

[0003] Aquaculture vessels are a core component of deep-sea aquaculture projects, possessing high economic, ecological, and social value. As a new type of deep-sea aquaculture equipment, compared to traditional aquaculture platforms, they offer the advantage of being able to navigate and avoid disasters such as typhoons and red tides. Currently, the world's first 100,000-ton aquaculture vessel is under construction. The vessel features 15 large, "jar-shaped" aquaculture tanks with smooth interiors. Each tank measures approximately 20m long, 20m wide, and 19m high, with a water depth of 14m and a capacity of approximately 5,600 cubic meters. As a highly intensive aquaculture model, aquaculture vessels offer high stocking density, a large number of adult fish, and are suitable for large-scale production of high-quality fish.

[0004] Due to the high stocking density and high oxygen demand in shipboard aquaculture, sufficient oxygen is crucial for the growth of fish in the aquaculture tanks. Failure to provide fresh oxygen to the aquaculture tanks in a timely manner can lead to widespread fish mortality, resulting in significant economic losses. Therefore, aeration devices are usually required to provide sufficient oxygen in the aquaculture tanks. Aeration is a method of creating strong contact between air and water, aiming to dissolve oxygen from the air into the water or expel unwanted gases and volatile substances from the water into the air. Oxygen from the air is transferred to the water through aeration, and oxygen is transferred from the gas phase to the liquid phase.

[0005] CN213202536U discloses a push-flow aeration device for aquaculture, comprising a fixed plate, a reinforcing rod, a floating plate, a mounting plate, an air compressor, a connecting pipe, a limiting plate, an aeration box, a connecting plate, a placement plate, a protective shell, a motor, a main gear, a sub-gear, a reinforcing ring, a first rotating plate, an adjusting plate, and a second rotating plate. The above patent can perform aeration through structures such as an air compressor and an aeration box, thereby aerating the aquaculture water area, which is convenient for aquaculture; the motor and other structures can drive the sub-gear to rotate, thereby driving the adjusting plate to rotate, so that the position of the bubble outlet of the aeration box can be changed by using the adjusting plate, thereby changing the position of the push-flow, which is convenient for adjusting the position of the airflow. Since the purpose of aeration is to dissolve oxygen in the air into water, the dissolution efficiency of oxygen is an important indicator of aeration, because the dissolution efficiency of oxygen is positively correlated with water pressure. When the floating push-flow aeration device is applied to the aquaculture cabin of an aquaculture ship, it cannot take advantage of the water depth advantage of the aquaculture cabin to improve the dissolution efficiency of oxygen.

[0006] Currently, most existing aeration systems directly introduce air into water, causing a significant amount of undissolved oxygen in the water to escape back into the air, resulting in low oxygen utilization. Another common method utilizes a water pump combined with an oxygen cone. The pump pressurizes water into the cone, where the oxygen and water mix, achieving efficient oxygen dissolution. However, this model consumes energy and requires significant investment.

[0007] In addition, the air bubbles discharged from some of the current aeration holes are relatively large, and when the large air bubbles float up, they can easily cause the fish to become agitated, which is not conducive to the growth of the fish. Summary of the Invention

[0008] In response to the shortcomings of the above-mentioned existing technologies, an intelligent oxygenated aquaculture water tank and an oxygenation method for a ship-borne aquaculture mode are provided. The intelligent aeration aquaculture water tank and an oxygenation method thereof are provided, which fully utilize the advantages of the water depth of the aquaculture tank and the rotating flow of seawater, disperse the high-pressure gas produced by the oxygen generator into a large number of tiny bubbles, and release them at the bottom of the aquaculture tank. The high water pressure at the bottom is conducive to the dissolution of oxygen. In addition, the bubbles are small and rise slowly in the water. During the rising process, they fully contact with the seawater, further dissolving the oxygen into the water.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is an intelligent oxygen-enhanced aquaculture water tank in a ship-borne tank culture mode, comprising an aquaculture water tank body, an oxygen supply device at the bottom of the aquaculture water tank body, a plurality of support pipes rotatably connected to the oxygen supply device at the bottom, an aeration device connected to the support pipe is provided at the top of each support pipe, the aeration device comprises a rotating chamber composed of a first mesh plate, a second mesh plate and a first annular plate for connecting the first mesh plate and the second mesh plate, an aeration chamber composed of a third mesh plate, a fourth mesh plate and a second annular plate for connecting the third mesh plate and the fourth mesh plate is provided in the rotating chamber, the top of the support pipe is connected to the bottom side of the aeration chamber, and an air inlet mesh plate is provided above the third mesh plate.

[0010] In the above-mentioned intelligent oxygenated aquaculture water tank of the shipborne cabin culture mode, the mesh aperture on the air inlet mesh plate is larger than the mesh aperture on the fourth mesh plate, and the mesh aperture on the fourth mesh plate is larger than the mesh aperture on the second mesh plate.

[0011] The above-mentioned intelligent oxygenated aquaculture water tank in the shipborne aquaculture mode, the oxygen supply device includes a plurality of oxygen supply pipes fixed to the bottom of the aquaculture water tank body and interconnected, and an oxygen generator for transporting oxygen into the oxygen supply pipes, and each oxygen supply pipe is provided with a fixed bearing for connecting to the support pipe.

[0012] The above-mentioned intelligent oxygenated aquaculture water tank of the ship-borne cabin culture mode has a plurality of blades arranged along the circumference of the outer surface of the first annular plate.

[0013] The above-mentioned intelligent oxygenated aquaculture water tank of the ship-borne cabin culture mode is provided with a diversion mechanism in the aeration chamber for diverting seawater downward, and the diversion mechanism includes a drive motor and a paddle provided on the drive motor.

[0014] In the above-mentioned intelligent oxygen-enhancing aquaculture water tank of the ship-borne cabin culture mode, the oxygen supply pipes are arranged in a well shape, and an aeration device is provided at the connection point of each oxygen supply pipe.

[0015] The above-mentioned method for increasing oxygen in the intelligent aeration aquaculture water tank in the ship-borne aquaculture mode includes the following steps:

[0016] (1) An oxygen supply device is installed at the bottom of the aquaculture water tank body. A support pipe connected to the bottom side of the aeration chamber is rotated on the oxygen supply device to supply oxygen into the aeration chamber through the oxygen supply device and the support pipe to achieve aeration;

[0017] (2) During aeration, the rotating flow of seawater in the aquaculture tank is used to realize the eccentric rotation of the aeration device, so that the released bubbles are distributed over a larger area in the horizontal direction.

[0018] In the above-mentioned method for increasing oxygen in the intelligent oxygenated aquaculture water tank of the shipborne aquaculture mode, in step (2), the rising bubbles are subjected to multi-stage shearing to increase the number of bubbles.

[0019] In the above-mentioned method for increasing oxygen in the intelligent oxygenated aquaculture water tank of the shipborne aquaculture mode, in step (2), the rising speed of the sheared bubbles is reduced, the contact time with seawater is increased, the dissolution amount is increased, and the bubble dissolution efficiency is improved.

[0020] The beneficial effect of the intelligent oxygenated aquaculture water tank and oxygenation method of the shipboard aquaculture mode of the present invention is that, since the dissolution efficiency of oxygen is positively correlated with the water pressure, the oxygen supply device and the aeration device are arranged at the bottom of the aquaculture water tank body, which fully utilizes the advantage of the water depth of the aquaculture tank. Moreover, since the water in the aquaculture tank is rotating and flowing, the contact opportunity between oxygen bubbles and seawater is increased in the flowing water, thereby fundamentally improving the dissolution efficiency of oxygen.

[0021] Since the water in the aquaculture chamber is rotating and flowing, the rotating seawater drives the aeration device to rotate synchronously. The top of the support pipe of the present application is connected to the bottom side of the aeration chamber, so that the eccentric rotation of the aeration device is achieved, so that the released bubbles are distributed over a larger area in the horizontal direction, the bubbles are distributed more evenly in the chamber, and the oxygen mass transfer rate is also improved. In addition, the aeration device is realized by utilizing the rotating flow of water in the aquaculture chamber, and no other energy-consuming devices are required to drive its rotation, which is more energy-efficient.

[0022] In this application, the mesh apertures on the air inlet screen are larger than those on the fourth screen, and the mesh apertures on the fourth screen are larger than those on the second screen. This achieves multi-stage shearing during the bubble rise process, increasing the number of bubbles and their specific surface area, thus increasing their contact area with seawater and facilitating their dissolution. Furthermore, after the bubbles are sheared, air dissolves in the water, increasing oxygen in the water and improving aeration efficiency. The sheared bubbles become smaller, less likely to agitate fish, and thus promoting their growth.

[0023] By providing a diversion mechanism within the aeration chamber to direct seawater downward, the downward force exerted by the blades accelerates the downward circulation of seawater, reduces the rising speed of sheared bubbles, increases their contact time with seawater, increases the amount of dissolved air, and improves bubble dissolution efficiency. Simultaneously, the downward force of the blades causes the surface seawater within the chamber to circulate downward. Undissolved oxygen in the seawater that rises to the surface circulates back into the chamber, further increasing oxygen utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a top view of Example 1;

[0025] Figure 2 Schematic diagram of the internal structure of the aeration device in Example 1;

[0026] Figure 3 Schematic diagram of the internal structure of the aeration device in Example 2;

[0027] Figure 4Schematic diagram of the structure of the aeration device in Example 2;

[0028] Figure 5 Schematic diagram of the internal structure of the aeration device in Example 4. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1-2 As shown, an intelligent oxygenated aquaculture water tank in a shipborne cabin culture mode includes an aquaculture water tank body 1, an oxygen supply device at the bottom of the aquaculture water tank body 1, a plurality of support pipes 3 rotatably connected to the oxygen supply device, and an aeration device 2 connected to the support pipe 3 is provided on the top of each support pipe. The aeration device 2 includes a rotating chamber composed of a first mesh plate 4, a second mesh plate 5 and a first annular plate 6 for connecting the first mesh plate 4 and the second mesh plate 5. An aeration chamber composed of a third mesh plate 7, a fourth mesh plate 8 and a second annular plate 9 for connecting the third mesh plate 7 and the fourth mesh plate 8 is provided in the rotating chamber. The top of the support pipe 3 is connected to the bottom side of the aeration chamber to realize eccentric rotation of the aeration device and expand the aeration range. The support pipe 3 can be welded to the bottom of the rotating chamber and the bottom of the aeration chamber. An air inlet mesh plate 10 is provided above the third mesh plate 7.

[0032] The oxygen supply device includes a plurality of interconnected oxygen supply pipes 11 fixed to the bottom of the aquaculture water tank body 1, and an oxygen concentrator for delivering oxygen into the oxygen supply pipes 11. The oxygen concentrator is conventional and will not be described in detail here. Each oxygen supply pipe 11 is provided with a fixed bearing 12 for connecting to the support pipe 3.

[0033] The oxygen supply pipes 11 are arranged in a well shape, and an aeration device 2 is provided at the connection point of each oxygen supply pipe 11.

[0034] Since the dissolution efficiency of oxygen is positively correlated with water pressure, the oxygen supply device and aeration device are set at the bottom of the aquaculture water tank body, which fully utilizes the advantage of the water depth of the aquaculture tank. Moreover, since the water in the aquaculture tank is rotating and flowing, the contact opportunity between oxygen bubbles and seawater is increased in the flowing water, thereby fundamentally improving the dissolution efficiency of oxygen.

[0035] Example 2

[0036] The same parts of this embodiment as those of embodiment 1 are not described in detail. The difference between the present embodiment and embodiment 1 is as follows: Figure 3-4 As shown, a plurality of blades 13 are provided along the circumference of the outer surface of the first annular plate 6. Taking advantage of the rotational flow of seawater, the plurality of blades 13 are provided to further improve the rotation efficiency of the rotating chamber.

[0037] Example 3

[0038] The parts of this embodiment that are identical to those of Example 1 will not be repeated. The differences are that the mesh apertures on the air inlet screen 10 are larger than those on the fourth screen 8, and the mesh apertures on the fourth screen 8 are larger than those on the second screen 5. This multi-stage shearing process during the bubble rise increases the number of bubbles, increases their specific surface area, and increases their contact area with seawater, facilitating dissolution. Furthermore, after the bubbles are sheared, air dissolves in the water, increasing oxygen in the water and improving aeration efficiency. The sheared bubbles become smaller, less likely to agitate fish, and thus promoting their growth.

[0039] Example 4

[0040] The same parts of this embodiment as those of embodiment 1 are not described in detail. The difference between the present embodiment and embodiment 1 is as follows: Figure 5 As shown, a diversion mechanism for directing seawater downward is provided within the aeration chamber. This diversion mechanism includes a drive motor 14 and paddles 15 mounted on the drive motor 14. By providing this diversion mechanism within the aeration chamber, the downward force exerted by the paddles accelerates the downward circulation of seawater, reduces the rising velocity of sheared bubbles, increases their contact time with seawater, increases the amount of dissolved air, and improves bubble dissolution efficiency. Simultaneously, the downward force of the paddles causes the surface seawater within the chamber to circulate downward. Undissolved oxygen within the seawater that rises to the surface recirculates downward into the chamber, further increasing oxygen utilization.

[0041] A method for increasing oxygen in a smart aeration aquaculture water tank in a shipborne aquaculture mode comprises the following steps:

[0042] (1) An oxygen supply device is installed at the bottom of the aquaculture water tank body. A support pipe connected to the bottom side of the aeration chamber is rotated on the oxygen supply device to supply oxygen into the aeration chamber through the oxygen supply device and the support pipe to achieve aeration;

[0043] (2) During aeration, the rotating flow of seawater in the aquaculture tank is used to realize the eccentric rotation of the aeration device, so that the released bubbles are distributed over a larger area in the horizontal direction.

[0044] In the step (2), the rising bubbles are subjected to multi-stage shearing to increase the number of bubbles.

[0045] In the step (2), the rising speed of the sheared bubbles is reduced, the contact time with seawater is increased, the dissolution amount is increased, and the bubble dissolution efficiency is improved.

[0046] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An intelligent oxygenated aquaculture water tank for shipboard aquaculture, comprising an aquaculture water tank body, characterized in that: An oxygen supply device is provided at the bottom of the aquaculture water tank body, and a plurality of support pipes are rotatably connected to the oxygen supply device, and an aeration device connected to the support pipe is provided on the top of each support pipe. The aeration device includes a rotating chamber composed of a first mesh plate, a second mesh plate and a first annular plate for connecting the first mesh plate and the second mesh plate. An aeration chamber composed of a third mesh plate, a fourth mesh plate and a second annular plate for connecting the third mesh plate and the fourth mesh plate is provided in the rotating chamber. The top of the support pipe is connected to one side of the bottom of the aeration chamber, and an air inlet mesh is provided above the third mesh plate. plate; the mesh aperture on the air inlet mesh plate is larger than the mesh aperture on the fourth mesh plate, and the mesh aperture on the fourth mesh plate is larger than the mesh aperture on the second mesh plate; the oxygen supply device includes a plurality of oxygen supply pipes fixed to the bottom of the aquaculture water tank body and interconnected, and an oxygen generator for transporting oxygen into the oxygen supply pipes, and each oxygen supply pipe is provided with a fixed bearing for connecting to a support pipe; a plurality of blades are provided along the circumference of the outer surface of the first annular plate; a diversion mechanism for diverting seawater downward is provided in the aeration chamber, and the diversion mechanism includes a drive motor and blades provided on the drive motor.

2. The intelligent oxygenated aquaculture water tank for shipborne aquaculture according to claim 1 is characterized in that: The oxygen supply pipes are arranged in a well shape, and an aeration device is provided at the connecting point of each oxygen supply pipe.

3. A method for increasing oxygen in a smart aeration aquaculture water tank in a shipborne aquaculture mode according to any one of claims 1 to 2, characterized in that: The steps include: (1) An oxygen supply device is provided at the bottom of the aquaculture water tank body. A support pipe connected to the bottom side of the aeration chamber is rotated on the oxygen supply device to supply oxygen into the aeration chamber through the oxygen supply device and the support pipe to achieve aeration; (2) During aeration, the rotating flow of seawater in the aquaculture tank is used to realize the eccentric rotation of the aeration device, so that the released bubbles are distributed over a larger area in the horizontal direction.

4. The oxygenation method for the intelligent oxygenation aquaculture water tank in the ship-borne aquaculture mode according to claim 3 is characterized in that: In the step (2), the rising bubbles are subjected to multi-stage shearing to increase the number of bubbles.

5. The oxygenation method for the intelligent oxygenation aquaculture water tank in the ship-borne aquaculture mode according to claim 4 is characterized in that: In the step (2), the rising speed of the sheared bubbles is reduced, the contact time with seawater is increased, the dissolution amount is increased, and the bubble dissolution efficiency is improved.

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