CN114145251A

CN114145251A - Floating closed net cage type offshore pasture

Info

Publication number: CN114145251A
Application number: CN202111575508.0A
Authority: CN
Inventors: 陈建军; 刘鑫; 邱旭
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Guangdong Energy Development Co ltd; Huaneng Clean Energy Research Institute; Huaneng Guangdong Shantou Offshore Wind Power Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-03-08

Abstract

The invention discloses a floating closed net cage type offshore pasture, which comprises a plurality of floating net cages, wherein each floating net cage comprises a floating frame and a net cage body arranged below the floating frame, each net cage body comprises a top plate, an outer wall and a bottom plate which are fixedly connected, a water inlet is formed in the upper part of the outer wall, a water outlet is formed in the lower part of the outer wall, and a water inlet system is arranged on the outer wall; the water inlet system comprises a water inlet pipe, the lower end of the water inlet pipe penetrates out of the shell and is used for sucking seawater, and the outlet of the water inlet pipe is communicated with the water inlet; the invention can simulate the fluidity of the sea, provide a healthier and safer fish growth environment, reduce the dependence on the environment, reduce various fish health problems caused by interaction with shallow seawater, and improve the sand content of water by percolation, so that the net cage has better universality and safety; meanwhile, the closed net cage is helpful for solving the influence of the open type offshore pasture on the ecological environment.

Description

Floating closed net cage type offshore pasture

Technical Field

The invention belongs to the technical field of marine ranches, and particularly relates to a floating closed net cage type marine ranch.

Background

According to the prediction of world food and agriculture organization, the demand of aquaculture reaches over 9000 ten thousand tons by 2030 years, which is increased by about 30% compared with 2015, and the research and analysis of fish as excellent protein accounts for about 25% of the human protein demand. With the increasing environmental requirements and the lack of land and river resources, oceans become hot spots for worldwide development, so that the development of ocean energy and ocean products is continuously concerned all over the world, and a hot spot about 'blue revolution', 'blue economy' and 'blue growth' is raised all over the world.

Despite the widespread and intensive interest in the development of marine ranch, a series of systematic and intensive studies have shown that various new and integrated development models, such as 2020 horizon of the european union and most of the projects involved in the open sea, indicate that it is difficult to realize forward revenues in current development models, especially in marine clean energy (including offshore wind power, wave power, and temperature difference energy, etc.), unless marine products with high economic added value, such as certain shellfish and fish, are raised in marine ranch. Most of the traditional offshore pastures are open culture modes, and the interaction with seawater causes various fish health and environmental protection problems: the use of floating pens permeable to the surrounding sea area, the large amount of fish confined therein provides good conditions for the growth and spread of marine parasites within the net and in the local environment, while in order to prevent algae growth on the net, this requires the use of large amounts of drugs and pesticides which, together with fish excretions and uneaten feed, contaminate the nearby sea and seabed, resulting in eutrophication of the marine environment.

Disclosure of Invention

The invention provides a floating closed net cage type offshore pasture, which reduces the dependence on the environment and reduces the environmental pollution of the traditional breeding industry.

In order to achieve the purpose, the floating closed net cage type offshore pasture poured by concrete comprises a plurality of floating net cages, wherein each floating net cage comprises a floating frame and a net cage body arranged below the floating frame, each net cage body comprises a top plate, an outer wall and a bottom plate which are fixedly connected, a water inlet is formed in the upper part of the outer wall, a water outlet is formed in the lower part of the outer wall, and a water inlet system is arranged on the outer wall; the water inlet system comprises a water inlet pipe, the lower end of the water inlet pipe penetrates out of the shell and is used for sucking seawater, and an outlet of the water inlet pipe is communicated with the water inlet.

Furthermore, a particle filter and a sterilization device are arranged at the upper part of the water inlet pipe.

Further, an ozone generator is arranged at the upper part of the water inlet pipe.

Further, a layer of safety net is arranged at the bottom in the net cage body.

Furthermore, the bottom inside the body of the box body is provided with an oxygenation device.

Furthermore, a filtering system for filtering silt and impurities is arranged in the net cage body.

Furthermore, the floating frame is connected with a mooring buoy, the mooring buoy is connected with a first end of a tether, a second end of the tether is connected with a first end of an anchor chain, a second end of the anchor chain is connected with an anchor, and the anchor is inserted into the sea bottom.

Further, the outer wall comprises a shell and an inner layer, and the shell and the inner layer are enclosed to form a cavity; the main body portion of the water inlet pipe is disposed in the cavity.

Furthermore, the water inlet of the water inlet pipe is connected with the water outlet of the water inlet pump, and the water outlet is provided with a water outlet pump.

Furthermore, the outer shell and the inner layer are both formed by pouring concrete.

Compared with the prior art, the invention has at least the following beneficial technical effects:

the invention aims to provide a concrete pouring based floating closed type net cage marine ranch, which has the advantages that the fluidity of the sea can be simulated, a cleaner, healthier and safer fish growth environment can be provided, the dependence on the environment is reduced, various fish health problems caused by interaction with shallow seawater are reduced, safer high-value marine products are provided, and the sand content of water can be improved through percolation, so that the net cage has better universality and safety; meanwhile, the closed net cage is helpful for solving the influence of the open type offshore pasture on the ecological environment.

Meanwhile, the closed pasture can reduce the use of medicines, reduce the waste phenomenon of feed, collect residual feed and the like, and avoid influencing the ecological environment. The offshore pasture system is a high-energy-consumption system, and the space planning and use are comprehensively considered, so that the offshore pasture system and the space planning and use are considered to be fused and developed. The floating design can enable the floating type marine engineering.

Further, an ozone generator is arranged at the upper part of the water inlet pipe, and ozone is used for sterilization and disinfection.

Furthermore, a layer of safety net is arranged at the bottom in the net cage body, so that dead fishes and shrimps and other careless sundries can be collected conveniently.

Furthermore, an oxygen increasing device is arranged at the bottom inside the net cage body to keep the oxygen content in the water body.

Furthermore, a filtering system is arranged in the net cage body and used for collecting various foods, medicines and other impurities so as to reduce the influence on the in-situ pollution and eutrophication.

Furthermore, the concrete structure can avoid common problems such as corrosion and the like, has equivalent structural strength and durability, and is convenient to transport and install in an integrally cast structure.

Drawings

FIG. 1 is a closed cage structure for concrete placement;

FIG. 2 is a schematic diagram of a water intake system;

FIG. 3 is a schematic diagram of the arrangement of the floating net cage;

FIG. 4 is a schematic diagram of fusion development.

In the drawings: 1. the device comprises a net cage body, 2, a water inlet system, 3, a mooring buoy, 4, a tether, 5, an anchor chain, 6, an anchor, 7, a floating type fan, 10, a floating frame, 11, an inner layer, 12, a shell, 13, a water inlet, 14, a water outlet, 15, a cavity inlet, 21, a water inlet pipe, 22, a particle filter, 23, a sterilizing device, 24 and an ozone generator.

Detailed Description

In order to make the objects and technical solutions of the present invention clearer and easier to understand. The present invention will be described in further detail with reference to the following drawings and examples, wherein the specific examples are provided for illustrative purposes only and are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention provides a novel concrete-poured floating closed net cage type ocean pasture and offshore wind power fusion development mode. Mainly relates to the development of a floating concrete pouring closed net cage so as to realize safe and reliable cultivation with high added value. The integral hoisting and installation are convenient for later-stage dismantling and operation and maintenance, and the offshore wind power integration development is helpful for better and higher offshore resource development.

Referring to fig. 1 and 4, a concrete poured floating closed net cage type offshore pasture includes a plurality of floating net cages disposed at gaps between floating fans 7.

The floating type net cage comprises a net cage body 1 and a floating frame 2, wherein the net cage body 1 is arranged at the lower part of the floating frame 2 and is positioned at the inner side of the floating frame 2. The net cage body 1 is of a closed net cage structure. The net cage body 1 is cylindrical and comprises a top plate, an outer wall and a bottom plate which are fixedly connected; the outer wall is the ring post, including shell 12 and inlayer 11, encloses between shell 12 and the inlayer 11 and closes and form the cavity, and shell 12 and inlayer 11 are formed by concrete placement, can bear the high pressure level under the abominable weather condition, adapt to marine bad situation to can avoid the corruption scheduling problem.

The design concept of the net cage body 1 is mainly based on the circulation of water flow, and meanwhile, the uniform distribution of gravity and pressure is ensured through the uniform arrangement and effective control of a circulating water flow system. The box body and the net cage body 1 are of a double-layer structure, the outer edge of the upper portion of the net cage body 1 is provided with a walkway on a deck, and handrails are arranged on two sides of the walkway and can be used for observation and operation and temporary equipment arrangement.

Cavity entry 15 has been seted up at the outer wall top, and a plurality of water inlets 13 of evenly arranging have been seted up on 11 upper portions of inlayer, and a plurality of delivery ports 14 controlled by the delivery pump are evenly seted up to 1 lower part of box with a net body, and delivery port 14 department installs out the water pump, and the delivery pump is used for controlling rivers speed and direction to obtain suitable rivers environment. Meanwhile, the device is provided with a filtering system which comprises a biological filter and a sponge filter for filtering silt and impurities and is used for collecting various foods, medicines and other impurities so as to reduce the pollution to the original place and the eutrophication influence. The filtration system is also serviced from above.

The water inlet pump and the water outlet pump are connected with an energy system arranged in a cavity enclosed by the shell 12 and the inner layer 11, and the energy system provides energy for the water inlet pump and the water outlet pump and controls the water inlet pump and the water outlet pump.

Referring to fig. 2, a plurality of water inlet systems 2 controlled by water inlet pumps independently are integrated on the upper part of the outer wall, each water inlet system 2 comprises a water inlet pipe 21, a water inlet pump is installed on each water inlet pipe 21, the main body part of each water inlet pipe 21 is arranged in the cavity, the lower end of each water inlet pipe 21 penetrates out of the outer shell 2 and is used for sucking seawater, and the outlet of each water inlet pipe 21 is communicated with the water inlet 13. To avoid floating algae and various marine parasites, the intake pipe 21 is extended to the lower part of the sea water to take water. The depth is adjusted and determined according to different water area environments and the water temperature suitable for each fish. The flow speed and the direction of the inlet water are controlled by the water inlet pump, and the water flow direction of the water inlet is downward flowing along the pipe wall to form a gentle flowing environment, so that the flowing environment can be simulated, and the complete turbulent flow is avoided.

The upper part of each inlet pipe 21 is provided with a particle filter 22, a sterilizing device 23 and an ozone generator. The particle filter 22 is a vertical particle filter 22 for removing sand and various impurities contained in the water; the sterilizing device 23 is a closed UV pressure-bearing type ultraviolet sterilizer for sterilizing; the sterilisation apparatus 23 and the particle filter 22 are placed in the upper part of the double deck structure, and access is gained from a special ladder above the chamber entrance 15.

Preferably, a layer of safety net is arranged at the bottom in the net cage body 1, so that dead fishes and shrimps and other carelessly entering sundries can be collected conveniently.

Preferably, an oxygen increasing device is installed at the bottom of the inner side of the net cage body 1 to keep the oxygen content in the water body.

Referring to fig. 3, the net cage of the present invention is of a floating type and mainly adapted to water areas with water depths exceeding 50 m, a net cage body 1 is mounted on a floating frame 10, the floating frame 2 is connected with a mooring buoy 3, the mooring buoy 3 is connected with a first end of a tether 4, a second end of the tether 4 is connected with a first end of an anchor chain 5, a second end of the anchor chain 5 is connected with an anchor 6, and the anchor 6 is inserted into the sea bottom.

Referring to fig. 4, because the closed net cage has the characteristic of high energy consumption, the mode development of 'green' plus 'blue' is realized by the integration of the closed net cage and an offshore wind field, and the closed net cage has important significance.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A floating closed net cage type offshore pasture is characterized by comprising a plurality of floating net cages, wherein each floating net cage comprises a floating frame (10) and a net cage body (1) arranged below the floating frame (10), each net cage body (1) comprises a top plate, an outer wall and a bottom plate which are fixedly connected, a water inlet (13) is formed in the upper part of the outer wall, a water outlet (14) is formed in the lower part of the outer wall, and a water inlet system (2) is arranged on the outer wall; the water inlet system (2) comprises a water inlet pipe (21), the lower end of the water inlet pipe (21) penetrates out of the shell (2) and is used for sucking seawater, and an outlet of the water inlet pipe (21) is communicated with the water inlet (13).

2. A floating closed-net cage offshore farm according to claim 1, characterized in that the inlet pipe (21) is fitted with a particle filter (22) and a sterilizing device (23) in its upper part.

3. A floating closed-net cage offshore farm according to claim 1, characterized in that the upper part of the intake pipe (21) is fitted with an ozone generator (24).

4. A floating closed net cage type offshore ranch according to claim 1, characterized in that a layer of safety net is arranged at the bottom inside the net cage body (1).

5. A floating closed net cage type offshore farm according to claim 1, characterized in that the body (1) of the cage is internally provided with an oxygen increasing device at the bottom.

6. A floating closed net cage type offshore ranch according to claim 1, characterized in that a filtering system for filtering silt and impurities is arranged in the net cage body (1).

7. A floating closed-box offshore farm according to claim 1, characterized in that the buoy (10) is connected to a mooring buoy (3), the mooring buoy (3) being connected to a first end of a tether (4), a second end of the tether (4) being connected to a first end of an anchor chain (5), a second end of the anchor chain (5) being connected to an anchor (6), the anchor (6) being inserted into the sea floor.

8. A floating closed-net-cage offshore farm according to claim 1, characterized in that the outer wall comprises an outer shell (12) and an inner layer (11), the outer shell (12) and the inner layer (11) enclosing a cavity; the main body part of the water inlet pipe (21) is arranged in the cavity.

9. A floating closed net cage offshore farm according to claim 1 or 8, characterized in that the inlet of the inlet pipe (21) is connected to the outlet of the inlet pump, and the outlet pump is arranged at the outlet (14).

10. A floating closed box offshore farm according to claim 8, characterized in that the outer shell (12) and the inner layer (11) are both cast of concrete.