A concrete culture net cage for collecting biological sludge fuel at sea

Abstract

This invention discloses a concrete aquaculture cage for collecting bio-sludge fuel at sea; it includes a concrete aquaculture cage body, a flow circulation system, a transportation system, and a mooring system; the concrete aquaculture cage body includes concrete aquaculture cage sidewalls, a cage net, and a drainage outlet, etc.; the flow circulation system includes a water pump, a gear turbine, and circulation pipes, etc.; the transportation system includes a transport vessel and a conveyor belt, etc.; the mooring system includes a mooring anchor, a damper, and an anchor chain, etc.; this invention uses a concrete aquaculture cage as a carrier and can be used for a long time in a marine environment; the flow circulation system maintains water flow, promotes the formation and collection of bio-sludge, and ensures that organic waste is effectively transported to the transport vessel; the equipped sludge fuel transport vessel and conveyor belt provide efficient transportation capacity, quickly and safely transporting the collected bio-sludge from the aquaculture cage to the destination or treatment facility, while ensuring the stability of the bio-sludge during the journey.

Description

Technical Field

[0001] This invention belongs to the field of marine aquaculture, and specifically relates to a concrete aquaculture cage for collecting bio-sludge fuel at sea. Background Technology

[0002] In existing technologies, marine concrete aquaculture cages are aquaculture facilities constructed using concrete materials in the ocean for the cultivation of fish, shellfish, and other aquatic plants and animals. They typically consist of concrete cages and mooring systems. The concrete cage is a structure similar to a giant water cage, providing ample space to house the cultured organisms. Simultaneously, the concrete cage provides sufficient seawater circulation and oxygen supply to promote healthy growth. Furthermore, concrete materials are durable, wave-resistant, and stable, capable of withstanding the impacts and waves of the marine environment. To ensure the stability and safety of the concrete cages, mooring systems are designed to anchor them to the water surface. Additionally, mooring systems can be designed according to different marine conditions and aquaculture needs to ensure the stability and sustainability of the aquaculture facility.

[0003] However, existing offshore aquaculture platforms also have some drawbacks, including: ① Traditional offshore aquaculture platforms use net cages or rafts for aquaculture, which can impact the marine ecosystem. For example, emissions, chemicals, and feed residues can directly enter the seawater, potentially causing eutrophication and pollution, negatively affecting the surrounding environment. ② A large amount of biological sludge is generated during aquaculture, and traditional treatment methods typically involve discharging it into the ocean, which may pose a potential threat to the seabed and ecosystem. Furthermore, sludge treatment and disposal require corresponding costs and resources. ③ Traditional offshore aquaculture platforms are limited by hydrodynamic conditions and environmental factors, resulting in low aquaculture efficiency. ④ Traditional aquaculture net cages may lack sufficient structural stability under severe weather conditions such as strong winds and waves, making them susceptible to damage or capsizing, leading to the escape or loss of farmed fish. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to develop a concrete aquaculture cage for collecting and utilizing biosludge as a renewable energy fuel in a marine environment. This invention converts organic waste in the concrete aquaculture cage into biomass fuel while providing a stable environment for cultivating and collecting this biosludge.

[0005] The technical solution of this invention is: a concrete aquaculture cage for collecting bio-sludge fuel at sea, comprising a cylindrical concrete aquaculture cage body.

[0006] The concrete aquaculture cage body includes the concrete aquaculture cage sidewall (2), the flow circulation system gear turbine (3), the cage fishing net (4), the aquaculture sea surface (5), the cage aquaculture space (7), the transport ship (8), and the seabed (20);

[0007] The concrete aquaculture cage is placed on the sea surface (5) for aquaculture, including the side walls (2) of the concrete aquaculture cage and the netting (4) placed at the bottom of the cage.

[0008] The side wall (2) of the concrete aquaculture cage and the cage net (4) at the bottom together constitute the cage aquaculture space (7) of the main body of the concrete aquaculture cage.

[0009] Furthermore, the side wall (2) of the concrete aquaculture cage is a hollow side wall, and a drainage outlet (27) is provided on the side wall (2) of the concrete aquaculture cage near the aquaculture sea level (5);

[0010] Inside the side wall (2) of the concrete aquaculture cage, there are evenly distributed circulation pipes (6) of a flow circulation system. The lower end of the circulation pipes (6) passes through the side wall (2) of the concrete aquaculture cage and is connected to the gear turbine (3) of the flow circulation system located below the main body of the concrete aquaculture cage.

[0011] Inside the side wall (2) of the concrete aquaculture cage, at the upper end of the circulation pipe (6) of the circulation system, there is a water pump (1) of the circulation system. The other end of the water pump (1) of the circulation system is connected to a conveyor belt (18). The other end of the conveyor belt (18) is connected to the transport ships (8) floating on both sides.

[0012] Furthermore, a mooring anchor (22) is installed at the seabed (20);

[0013] A mooring system (21) is fixedly connected to the bottom of the outer wall of the concrete aquaculture cage body, and the other end of the mooring system (21) is connected to the mooring anchor (22).

[0014] Furthermore, the mooring anchor (22) is a heavy metal component.

[0015] Furthermore, the mooring system (21) includes a spring (23), a damper (24), a connector (25), and an anchor chain (26);

[0016] A damper (24) is installed inside the main body of the concrete aquaculture cage, and a spring (23) is installed around the damper (24). One end of the spring (23) and the damper (24) are connected to the main body of the concrete aquaculture cage.

[0017] A connector (25) is connected to the other end of the damper (24) and the spring (23), and the connector (25) is connected to the mooring anchor (22) via a connected anchor chain (26).

[0018] Furthermore, the connector (25) is a component used to connect the anchor chain (26), the spring (23) and the damper (24), all of which are made of high-strength, corrosion-resistant composite materials.

[0019] Furthermore, the water pump (1) of the circulating system includes a water pump inlet (9), a water pump body (10), a water pump outlet (11), a water pump motor (12), and a water pump mounting base (13).

[0020] A pump body (10) is installed on one side of the pump inlet (9), and a pump outlet (11) is opened at the upper end of the pump body (10). A pump fixing base (13) is connected to the other end of the pump body (10), and a pump motor (12) is connected to the other end of the pump fixing base (13).

[0021] The water pump inlet (9) is connected to the circulation pipe (6) of the flow circulation system, and the water pump outlet (11) is connected to the conveyor belt (18).

[0022] Furthermore, the flow circulation system gear turbine (3) includes a gear turbine impeller (14), gear turbine blades (15), a gear turbine power unit (16), a gear turbine motor (17), and a gear turbine mounting base (19).

[0023] The gear turbine mounting base (19) is located at the bottom. A gear turbine motor (17) is connected to the upper end of the gear turbine mounting base (19). A gear turbine power unit (16) is connected to the other end of the gear turbine motor (17). A gear turbine impeller (14) is mounted on the gear turbine power unit (16). Gear turbine blades (15) are mounted on the gear turbine impeller (14).

[0024] Furthermore, the main body of the concrete aquaculture cage is made of reinforced concrete or wire mesh, and is integrally cast with cement.

[0025] The bottom of the concrete aquaculture cage body is inclined inward;

[0026] The net cage (4) is a rigid net;

[0027] The aquaculture sea level (5) is the aquaculture height of the aquaculture cages, and the water level can be adjusted according to actual aquaculture needs;

[0028] The cage culture space (7) and the type of fish fry can be adjusted according to actual culture needs;

[0029] The amount of seawater replenished in the cage aquaculture space (7) is operated through the drainage outlet (27).

[0030] Furthermore, the number of the flow circulation system pumps (1) is 8, which are evenly distributed on the circumference of the circular concrete aquaculture cage body. Any number of flow circulation system pumps (1) can be turned on or off according to actual needs.

[0031] The beneficial effects of this invention are as follows: 1. Renewable energy utilization: This invention converts organic waste into biomass fuel by collecting and utilizing biological sludge from seawater as renewable energy fuel. This method can effectively recycle and utilize marine waste resources, reducing dependence on traditional energy sources; 2. Environmental friendliness: This invention provides a stable environment for cultivating and collecting biological sludge, reducing the impact of biological waste on the marine ecosystem; simultaneously, converting this waste into fuel can also reduce pollutant emissions, resulting in a smaller impact on the environment; 3. Durability and stability: The aquaculture cages made of concrete materials are water-resistant, wave-resistant, and durable, enabling long-term use in the marine environment and providing a stable environment for cultivating and collecting biological sludge; 4. High-efficiency energy conversion: Through a flowing circulation system, this invention can promote the formation and... Stable and improves energy conversion efficiency; this maximizes the extraction of energy from organic waste, providing a sustainable fuel source; 5. Adjustability and flexibility: The design of this invention can be adjusted and improved according to specific needs; the size, capacity, and internal structure of the aquaculture cages can be customized according to different marine environments and aquaculture projects to meet specific requirements to the greatest extent; the mooring system is commercially mature, with different sizes, structures, materials, and stiffnesses available; for example, large-scale smelt farming requires 10,000 cubic meters of aquaculture cage space, the rigid fishing net size of the cage is 10*10*2, and the mooring system adopts catenary mooring, etc. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the system structure according to an embodiment of the present invention;

[0033] Figure 2 This is a top view of the main body of the concrete aquaculture cage in this invention;

[0034] Figure 3 This is a top view of the net cage fishing net in this invention;

[0035] Figure 4 This is a top view of the water pump in the flow circulation system of this invention;

[0036] Figure 5 This is a side view of the water pump in the flow circulation system of this invention;

[0037] Figure 6 This is a front view of the water pump in the circulating system of this invention;

[0038] Figure 7 This is a top view of the gear turbine in the flow circulation system of this invention;

[0039] Figure 8 This is a front view of the gear turbine in the flow circulation system of this invention;

[0040] Figure 9 This is a side view of the gear turbine in the flow circulation system of the present invention;

[0041] Figure 10 This is a bottom view of the main body of the concrete aquaculture cage in this invention;

[0042] Figure 11 This is a side view of the main body of the concrete aquaculture cage in this invention;

[0043] Figure 12 This is a schematic diagram of the mooring system in this invention;

[0044] Among them, 1 is the water pump of the circulating system, 2 is the side wall of the concrete aquaculture cage, 3 is the gear turbine of the circulating system, 4 is the cage net, 5 is the aquaculture sea surface, 6 is the circulation pipe of the circulating system, 7 is the cage aquaculture space, 8 is the transport ship, 9 is the water pump inlet, 10 is the water pump body, 11 is the water pump outlet, 12 is the water pump motor, 13 is the water pump mounting base, 14 is the gear turbine impeller, 15 is the gear turbine blade, 16 is the gear turbine power unit, 17 is the gear turbine motor, 18 is the conveyor belt, 19 is the gear turbine mounting base, 20 is the seabed, 21 is the mooring system, 22 is the mooring anchor, 23 is the spring, 24 is the damper, 25 is the connector, 26 is the anchor chain, and 27 is the drain outlet. Detailed Implementation

[0045] The specific technical solution of the present invention will be further described in detail below with reference to specific examples.

[0046] This invention uses a concrete aquaculture cage as the carrier, which has strong water resistance and durability, enabling long-term use in marine environments and providing a stable environment for the cultivation and collection of biological sludge. It is equipped with a powerful flow circulation system to maintain water flow and promote the formation and collection of biological sludge, while ensuring that organic waste in the concrete aquaculture cage is effectively transported to the transport vessel 8 without causing blockages or pollution of the aquaculture space. The transport vessel 8, equipped with specialized sludge fuel and a conveyor belt 18, provides efficient transportation capabilities, quickly and safely transporting the collected biological sludge from the concrete aquaculture cage to its destination or treatment facility, while ensuring the quality and stability of the biological sludge during transit. The biological sludge collection and treatment steps are: sludge collection → preliminary filtration → sedimentation and separation → secondary filtration → dewatering → purification → compression → packaging and transportation.

[0047] Specifically, such as Figure 1 , Figure 10 , Figure 11 , Figure 12 As shown, the present invention includes a concrete aquaculture cage body, a flow circulation system, a transportation system, and a mooring system 21.

[0048] The main body of the concrete aquaculture cage includes a concrete aquaculture cage side wall 2, a cage net 4, a drainage outlet 27, an aquaculture sea level 5, and a cage aquaculture space 7.

[0049] The side wall 2 of the concrete aquaculture cage is a hollow side wall, which can balance the buoyancy and gravity of the main body of the concrete aquaculture cage;

[0050] The main body of the concrete aquaculture cage is constructed by integral pouring reinforced concrete or steel wire mesh cement. A mooring system 21 is installed at the bottom of the cage and is connected and fastened to the main body of the concrete aquaculture cage.

[0051] When the main body of the concrete aquaculture cage is submerged, the mooring system 21 controls the main body of the concrete aquaculture cage to submerge to a preset depth to ensure the wind and wave resistance and the safety of the aquaculture organisms in the cage.

[0052] The net cage 4 is a rigid net, which can ensure that biological sludge can pass through the net cage 4, and also ensure that the net cage 4 is not affected by the suction of the gear turbine 3 of the flow circulation system.

[0053] The aquaculture sea level 5 is the aquaculture height of the aquaculture cages, and the water level can be adjusted according to actual aquaculture needs;

[0054] The cage culture space 7 and the types of fish fry can be adjusted according to actual culture needs;

[0055] The bottom of the concrete aquaculture cage is inclined inward, making it easier for biological sludge to accumulate.

[0056] When seawater needs to be added to the main body of the concrete aquaculture cage, it can be done through the drain outlet 27.

[0057] The flow circulation system includes a flow circulation system pump 1, a flow circulation system gear turbine 3, and a flow circulation system circulation pipe 6;

[0058] The water pump 1 of the circulating system is a centrifugal pump, which is a common and widely used liquid conveying device with advantages such as high efficiency, adjustability and easy maintenance. It includes a water pump body 10, a gear turbine impeller 14, a gear turbine blade 15, a water pump inlet 9 and a water pump outlet 11, a guide pipe and a water pump fixed base 13, and a water pump motor 12, etc.

[0059] The aforementioned flow circulation system gear turbine is an energy conversion device that combines gear transmission and turbine principles. It generates power by converting rotational motion into centrifugal force. It features high-efficiency energy conversion, adjustability, and wide application, playing an important role in the energy field. It includes gear turbine blades 15, turbine disc, pump wheel, and support structure (i.e., gear turbine impeller 14, gear turbine power unit 16, gear turbine motor 17, gear turbine fixed base 19), etc.

[0060] The circulating pipe 6 of the flow circulation system is a galvanized steel pipe, which has high corrosion resistance and strength. It can resist corrosion from salt and moisture in seawater and provide reliable performance under various environmental conditions.

[0061] The transportation system includes a transport ship 8, a conveyor belt 18, and a shore-side sludge treatment plant.

[0062] The advantages of the transport vessel 8 are: Transport vessels 8 typically have a large load capacity, capable of accommodating large quantities of biological sludge, reducing the number of transport trips, improving transport efficiency, and saving time and costs; Sealing and leak-proof design: biological sludge is a special type of cargo, requiring measures to ensure its secure sealing and prevent leakage and environmental pollution; Corrosion resistance and durability: due to the potential corrosiveness of biological sludge, the materials and coatings of the transport vessel 8 should be selected based on their corrosion resistance, such as stainless steel or anti-corrosion coatings, to ensure the durability and lifespan of the hull; Environmental friendliness: transport vessels 8 typically employ designs and technologies that meet environmental protection requirements to minimize adverse impacts on marine and aquatic ecosystems.

[0063] The transport vessel 8 must have the ability to perform preliminary filtration of the mixture of seawater and sludge.

[0064] The equipment used in the sludge treatment plant on the shore, such as filter presses, centrifuges, belt dewatering machines, and generators, are all mature commercial equipment.

[0065] The mooring system 21 includes a mooring anchor 22, a spring 23, a damper 24, a connector 25, and an anchor chain 26; the mooring system 21 refers to the equipment and technology used to fix and stabilize the main body of the concrete aquaculture cage, which is a catenary mooring, including a mooring anchor 22, a buoy or float and an anchor chain 26, etc.

[0066] The mooring anchor 22 is typically a heavy metal component that provides drag by embedding itself underwater into the seabed 20;

[0067] The spring 23 is an important component of the mooring system 21, used to reduce the impact force on the concrete aquaculture cage body;

[0068] It can absorb and mitigate external impacts on the concrete aquaculture cage body, such as wind, waves, tides, or waves generated by other ships passing by. The elastic properties of spring 23 can absorb the impact force and pull the concrete aquaculture cage body back to its original position after it recovers its shape.

[0069] The damper 24 is also a key component in the mooring system 21, used to reduce the vibration and swaying of the concrete aquaculture cage body. The damper 24 can suppress the movement of the concrete aquaculture cage body by providing additional resistance, so as to reduce the swaying and shaking of the concrete aquaculture cage body.

[0070] The connector 25 is a component used to connect the mooring anchor 22, the spring 23 and the damper 24. They are typically made of high-strength, corrosion-resistant composite materials to ensure the reliability and stability of the system.

[0071] Since the mooring system 21 is commercially mature and available in different sizes, structures, materials, and stiffnesses, the main difference of this invention is that when the concrete aquaculture cage body is in operation, the mooring anchor 22 is deployed and connected to the seabed 20, the damper 24 and spring 23 reduce impact and vibration, the connector 25 connects the various components together, and the anchor chain 26 is responsible for transmitting tension and keeping the concrete aquaculture cage body in the designated position.

[0072] like Figure 2 , Figure 3 As shown, the net cage net 4 is a rigid net that must meet three requirements: biological sludge can pass through, fish fry cannot pass through, and it is not affected by the suction of the gear turbine of the flow circulation system. At the same time, it can be customized according to different marine environments and aquaculture projects to meet specific requirements to the greatest extent.

[0073] The circulating system has eight pumps 1, which are evenly distributed around the circumference of the circular concrete aquaculture cage. Any number of the circulating system pumps 1 can be turned on or off according to actual needs.

[0074] like Figure 4 , Figure 5 , Figure 6 The diagram shows a three-view drawing of the pump 1 in the flow circulation system, with key components including the pump inlet 9, pump body 10, pump outlet 11, pump motor 12, and pump mounting base 13 clearly marked. Its working principle is as follows: Seawater enters the center of the pump body 10 and passes through the inlet pipe; the rotating gear turbine impeller 14 is driven by the gear turbine motor 17, generating centrifugal force as it rotates; this centrifugal force causes the seawater to be thrust on the gear turbine impeller 14, moving it outwards along its axial direction; the seawater is pushed into the outer casing of the pump body 10 and discharged through the outlet pipe; the design and shape of the pump body 10 can increase the velocity and pressure of the seawater to meet specific flow rate and head requirements.

[0075] like Figure 7 , Figure 8 , Figure 9 The diagram shows a three-view drawing of the gear turbine in the flow circulation system, including important components such as the gear turbine impeller 14, gear turbine blades 15, gear turbine power unit 16, gear turbine motor 17, and gear turbine mounting base 19. Its working principle is as follows: The input shaft transmits rotational energy to the output shaft via gear transmission. The gear system regulates and increases the speed or torque. One or more gear turbine blades 15 are connected to the output shaft. When the gear transmission drives the output shaft to rotate, the gear turbine blades 15 are pushed and generate centrifugal force. The environment in which the gear turbine blades 15 are located is filled with seawater. The seawater, through the gear turbine blades 15, generates centrifugal force, propelling the seawater and converting it into mechanical energy. After passing through the gear turbine blades 15, the seawater converts its kinetic energy into mechanical energy, thereby driving the load or generator on the output shaft.

[0076] The concrete aquaculture cage for collecting bio-sludge fuel at sea, as described in this invention, has the following operation process:

[0077] When concrete aquaculture cages used for collecting bio-sludge fuel at sea are in operation, their stability at sea is ensured by the mooring anchor 22, spring 23, damper 24, connector 25, anchor chain 26, etc. in the mooring system 21.

[0078] In the cage culture space 7, marine fish are normally raised. The biological sludge produced by the fish sinks to the bottom through the cage net 4. Because the bottom of the concrete culture cage body is inclined inward, the biological sludge is more likely to accumulate.

[0079] Every so often, the gear turbine 3 of the flow circulation system starts to work, and the impeller 14 of the gear turbine rotates, carrying the seawater carrying biological sludge through the circulation pipe 6 of the flow circulation system.

[0080] At the same time, the circulating system pump 1 starts to work, drawing seawater from the pump inlet 9, and through the pump body 10, the seawater carrying biological sludge is drawn from the pump outlet 11 onto the conveyor belt 18.

[0081] A mechanical filter is provided at the inlet of the conveyor belt 18 to remove impurities;

[0082] The mixture after preliminary filtration is directed to the sedimentation tank or separation equipment of transport ship 8 to allow solid particles to settle and water to be separated.

[0083] Transport ship 8 then transports the mixture to the shore sludge treatment plant for further processing.

[0084] In shore sludge treatment plants, the separated supernatant is further filtered through screens or centrifugal filters to remove smaller solid particles and impurities, and dewatering equipment (such as filter presses, centrifuges or belt dewatering machines) is used to reduce the water content of the liquid to the required level.

[0085] Appropriate extraction techniques (such as precipitation, centrifugation or chemical treatment) are used to extract and separate biofuels from the mixture. Then, a compressor or press is used to compress the purified biofuels into blocks for easy storage and transportation.

[0086] Finally, the compressed biofuel is packed into appropriate packaging containers (such as corrosion-resistant containers) and transported by truck to where it is needed (such as power plants or fertilizer plants).

Claims

1. A concrete aquaculture cage for collecting bio-sludge fuel at sea, characterized in that: Includes the main body of a cylindrical concrete aquaculture cage. The main body of the concrete aquaculture cage includes the concrete aquaculture cage sidewall (2), the flow circulation system gear turbine (3), the cage fishing net (4), the aquaculture sea level (5), the cage aquaculture space (7), the transport ship (8), and the seabed (20). The concrete aquaculture cage is placed on the sea surface (5) for aquaculture, including the side wall (2) of the concrete aquaculture cage and the cage net (4) placed at the bottom. The side wall (2) of the concrete aquaculture cage and the cage net (4) at the bottom together constitute the cage aquaculture space (7) of the main body of the concrete aquaculture cage. The side wall (2) of the concrete aquaculture cage is a hollow side wall, and a drainage outlet (27) is provided on the side wall (2) of the concrete aquaculture cage near the sea level (5). Inside the side wall (2) of the concrete aquaculture cage, there are evenly distributed circulation pipes (6) of the flow circulation system. The lower end of the circulation pipes (6) of the flow circulation system passes through the side wall (2) of the concrete aquaculture cage and is connected to the gear turbine (3) of the flow circulation system located below the main body of the concrete aquaculture cage. Inside the side wall (2) of the concrete aquaculture cage, at the upper end of the circulation pipe (6) of the circulation system, there is a water pump (1) of the circulation system. The other end of the water pump (1) of the circulation system is connected to a conveyor belt (18). The other end of the conveyor belt (18) is connected to the transport ships (8) floating on both sides. The circulating system water pump (1) includes a water pump inlet (9), a water pump body (10), a water pump outlet (11), a water pump motor (12), and a water pump mounting base (13). A pump body (10) is installed on one side of the pump inlet (9), and a pump outlet (11) is opened at the upper end of the pump body (10). A pump mounting base (13) is connected to the other end of the pump body (10), and a pump motor (12) is connected to the other end of the pump mounting base (13). The water pump inlet (9) is connected to the circulation pipe (6) of the flow circulation system, and the water pump outlet (11) is connected to the conveyor belt (18).

2. The concrete aquaculture cage for collecting bio-sludge fuel at sea according to claim 1, characterized in that: A mooring anchor (22) is placed at the seabed (20); A mooring system (21) is fixedly connected to the bottom of the outer wall of the concrete aquaculture cage body, and the other end of the mooring system (21) is connected to the mooring anchor (22).

3. A concrete aquaculture cage for collecting bio-sludge fuel at sea according to claim 2, characterized in that: The mooring anchor (22) is a heavy metal component.

4. A concrete aquaculture cage for collecting bio-sludge fuel at sea according to claim 2, characterized in that: The mooring system (21) includes a spring (23), a damper (24), a connector (25), and an anchor chain (26). A damper (24) is installed inside the main body of the concrete aquaculture cage, and a spring (23) is installed around the damper (24). One end of the spring (23) and the damper (24) are connected to the main body of the concrete aquaculture cage. A connector (25) is connected to the other end of the damper (24) and the spring (23), and the connector (25) is connected to the mooring anchor (22) via the connected anchor chain (26).

5. A concrete aquaculture cage for collecting bio-sludge fuel at sea according to claim 4, characterized in that: The connector (25) is a component used to connect the anchor chain (26), the spring (23) and the damper (24), all of which are made of high-strength, corrosion-resistant composite materials.

6. A concrete aquaculture cage for collecting bio-sludge fuel at sea according to claim 1, characterized in that: The flowing circulation system gear turbine (3) includes a gear turbine impeller (14), gear turbine blades (15), a gear turbine power unit (16), a gear turbine motor (17), and a gear turbine mounting base (19). The gear turbine mounting base (19) is located at the bottom. A gear turbine motor (17) is connected to the upper end of the gear turbine mounting base (19). A gear turbine power unit (16) is connected to the other end of the gear turbine motor (17). A gear turbine impeller (14) is mounted on the gear turbine power unit (16). Gear turbine blades (15) are mounted on the gear turbine impeller (14).

7. A concrete aquaculture cage for collecting bio-sludge fuel at sea according to claim 1, characterized in that: The main body of the concrete aquaculture cage is made of reinforced concrete or wire mesh and is integrally cast with cement. The bottom of the concrete aquaculture cage body is inclined inward; The net cage (4) is a rigid net; The aquaculture sea level (5) is the aquaculture height of the aquaculture cages, and the water level can be adjusted according to actual aquaculture needs; The cage culture space (7) and the type of fish fry can be adjusted according to actual culture needs; The amount of seawater replenished in the cage aquaculture space (7) is operated through the drainage outlet (27).

8. A concrete aquaculture cage for collecting bio-sludge fuel at sea according to claim 1, characterized in that: The number of the flow circulation system pumps (1) is 8, which are evenly distributed on the circumference of the circular concrete aquaculture cage body. Any number of flow circulation system pumps (1) can be turned on or off according to actual needs.

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