Prawn biological contact oxidation pond and lift assembly thereof

Abstract

The invention relates to the technical field of prawn culture, in particular to a prawn biological contact oxidation pond and a lift assembly thereof. According to the technical scheme, the device comprises a pond body, a positioning structure, a base, a sliding rod, a net cage and porous seats, a water inlet is formed in one side of the pond body, a water outlet is formed in the other side of the pond body, the porous seats are arranged in the pond body at equal intervals, the net cage is placed on the porous seats, and the net cage and the porous seats are provided with an aeration structure and a pollution discharge structure respectively. The net cage is arranged in the pond body, the net cage is filled with granular biological filler, the base is arranged above the pond body in a sliding mode through a sliding structure, a reel is rotationally arranged on the base through a driving structure, and the positioning structure is arranged at the end of the base. According to the invention, the fishing in the prawn culture process becomes efficient, and meanwhile, through the innovative distributed lift assembly design, the limitation of the traditional oxidation pond oxygenation technology is successfully solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prawn farming, and particularly relates to a prawn biological contact oxidation pond and its lift component. Background Art

[0002] During the prawn farming process, the management of the farming pond and the catching of prawns are important links affecting the farming efficiency and quality. Traditional prawn farming methods often face problems such as uneven water quality in the farming pond, unstable growth environment for prawns, and difficult catching operations. In large-scale farming ponds, how to efficiently separate prawns from water and carry out catching operations has always been a technical difficulty.

[0003] In existing prawn farming ponds, the overall farming method is usually adopted. When catching prawns after they mature, a large amount of manual operation is required, which is time-consuming and laborious.

[0004] Prawn farming has extremely high requirements for water quality conditions. In particular, the dissolved oxygen concentration is an important factor affecting the growth, survival, and yield of prawns. Traditional oxidation pond aeration methods mainly rely on mechanical aeration and surface aeration devices, but these methods have the following disadvantages: uneven oxygen distribution, high energy consumption and low efficiency, and difficult dynamic regulation of water quality.

[0005] Therefore, we propose a prawn biological contact oxidation pond and its lift component to solve the existing problems. Summary of the Invention

[0006] The purpose of the present invention is to propose a prawn biological contact oxidation pond and its lift component for the problems existing in the background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A prawn biological contact oxidation pond, comprising a pond body, a positioning structure, a base, a sliding rod, a net box, and a porous seat. An inlet is provided on one side of the pond body, and an outlet is provided on the other side of the pond body. Porous seats are equidistantly arranged inside the pond body. A net box is placed on the porous seats. Aeration structures and sewage discharge structures are respectively provided on the net box and the porous seats. The inside of the net box is filled with granular biological fillers;

[0008] The base is slidably arranged above the pond body through a sliding structure, and a reel is rotatably arranged on the base through a driving structure;

[0009] The positioning structure is arranged at the end of the base. The positioning structure is composed of a spiral ring, a ring block, an extrusion block, a spring, a U-shaped block, a rotating groove, a friction tube, and a rotating shaft. The friction tube is arranged on the outer wall of the base. The sliding rod penetrates through the inside of the friction tube. The rotating grooves are symmetrically opened on the inner wall of the friction tube. The rotating shaft is rotatably arranged in the rotating grooves. The middle part of the U-shaped block is arranged on the rotating shaft;

[0010] The spiral thread is provided on the outer wall of the friction tube. The ring block is coaxially rotatably arranged inside the spiral. The extrusion blocks are symmetrically arranged on the ring block. The extrusion blocks are located between the inner wall of the friction tube and the U-shaped block. The spring presses and positions the U-shaped block.

[0011] Preferably, the aeration structure is composed of an aeration pipe and aeration heads. The aeration pipe is provided at the lower end of the tank body. The aeration heads are equidistantly arranged on the aeration pipe. The aeration heads penetrate through the porous seat and insert into the inside of the net cage. The aeration structures of each row of net cages are interconnected.

[0012] The sewage discharge structure is composed of a sewage discharge pipe, a sewage discharge port and a valve. The sewage discharge pipe is provided at the lower end of the tank body. The sewage discharge port is opened at the bottom end of the inner wall of the porous seat. The valve is provided inside the sewage discharge port. The sewage discharge port is connected to the sewage discharge pipe. The sewage discharge structures of each row of net cages are interconnected.

[0013] Preferably, the sliding structure is composed of a guide rail, a positioning rod, a sliding rod, a side plate and a slider. The guide rail is provided on the upper surface of the tank body. The slider is slidably arranged on the guide rail. The side plate is provided at the top end of the slider.

[0014] Preferably, the positioning rod and the sliding rod are arranged between the side plates. The positioning rod is directly below the sliding rod. The base is slidably inserted on the positioning rod and the sliding rod.

[0015] Preferably, the driving structure is composed of a gear, a toothed ring and an electric motor. One end of the toothed ring is provided on the outer wall of the reel and is rotatably connected to the base. The electric motor is provided on the base. The gear is provided at the output end of the electric motor. The gear meshes with the teeth of the toothed ring.

[0016] Preferably, the inner wall of the friction tube is designed in a square shape. The plane of the extrusion block is in sliding contact with the inner wall of the friction tube.

[0017] Preferably, one end of the spring is provided in the rotation groove. The other end of the spring is provided on the U-shaped block. The original length of the spring is greater than the depth of the rotation groove.

[0018] Preferably, hanging ears are symmetrically provided on the outer wall at the upper end of the net cage. A pull rope is wound on the reel. Two hooks are provided at the end of the pull rope. The hooks are adapted to the hanging ears.

[0019] Preferably, the inner diameters of the mesh holes of the net cage and the porous seat are smaller than the particle diameter of the biological filler.

[0020] A lift component for a prawn biological contact oxidation pond, comprising a distributed lift module, a water flow regulation system, a propeller-assisted oxygenation device, an intelligent control unit and a real-time monitoring system, which can dynamically adjust the dissolved oxygen concentration by optimizing the lift height and water flow rate;

[0021] The distributed lift module is composed of multiple independent lift units. Each lift unit is equipped with a water pump, a lift regulating valve and an oxygen sensor. By adjusting the opening degree of the valve, the lift height of the water pump is regulated to meet the dissolved oxygen requirements of different areas of the oxidation pond. The distributed lift modules operate in coordination through network communication. The information interaction of each module adjusts its own lift height through centralized calculation to optimize the overall system performance and effectively reduce the operation differences between modules;

[0022] The water flow regulation system combines water flow monitoring and automatic control functions. It can detect the water flow rate in the oxidation pond in real time and maintain the best water circulation conditions by adjusting the output power of the water pump to ensure the ecological balance of the prawn culture pond;

[0023] The propeller-assisted oxygenation device is arranged in the lift module. Through the high-speed rotation of the propeller, the water body is fully contacted with the air, thereby effectively increasing the dissolved oxygen content in the water. The propeller blades are designed in an inclined form to further increase the contact area between water and gas and improve the oxygenation efficiency;

[0024] The intelligent control unit has precise monitoring and regulation functions. It can collect key parameters such as dissolved oxygen concentration, water temperature, and water flow rate in the oxidation pond in real time, and perform dynamic regulation based on the difference between the preset target concentration and the actual concentration to achieve precise oxygen supply;

[0025] The intelligent control unit works in coordination with the distributed lift module to optimize the oxygen transfer rate in the water body in real time, ensure the uniform distribution of dissolved oxygen in different areas of the oxidation pond, and avoid the problems of hypoxia or over-oxygenation in local areas;

[0026] The real-time monitoring system collects data such as dissolved oxygen concentration, water flow rate, and water temperature in the oxidation pond in real time through a multi-parameter sensor network. The monitoring results are transmitted to the central control unit in digital signals for dynamic analysis and regulation to ensure the high efficiency and stability of the system operation;

[0027] The system has an energy consumption optimization function. By comprehensively considering the water pump power consumption, mass transfer efficiency and oxygen utilization rate in the water body, the operation state of the lift component is dynamically adjusted to achieve an efficient and energy-saving operation mode.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] Regional management of aquaculture ponds: The aquaculture ponds are divided into multiple regions, and live shrimp seedlings are cultured separately in each region. Physical isolation of the aquaculture regions is carried out through net cages. Each net cage can accommodate a certain number of shrimps, ensuring the independent growth of shrimps in different regions and avoiding the situation of uneven water quality or mutual interference among shrimps during the aquaculture process;

[0030] Convenient and efficient fishing operation: After the shrimps mature, the net cage is lifted by a reel control, and only the mature shrimps are left. This design ensures that only the suitable shrimps for fishing are left during the fishing process, greatly facilitating the fishing operation of the personnel;

[0031] Optimizing the growth environment of shrimps: By regularly cleaning and replacing the biological fillers in each net cage, maintaining the activity of the biofilm and a healthy aquaculture environment, the lifting and cleaning design of the net cage helps to continuously optimize the water quality, improve the aquaculture efficiency, and avoid affecting the growth and yield of shrimps due to water quality deterioration;

[0032] Through the above, the fishing operation in the shrimp aquaculture process becomes more simple and efficient, greatly improving the management level and aquaculture efficiency of the aquaculture ponds;

[0033] At the same time, the lift component has the following advantages:

[0034] Precise oxygen supply and optimized oxygen distribution: The distributed lift component adopts dynamic lift adjustment technology. According to the real-time dissolved oxygen demand in different regions of the oxidation pond, by adjusting the lift height and water flow rate, it ensures the uniform distribution of oxygen in the pond body, effectively avoiding the problems of local hypoxia or excessive oxygen, and improving the ecological suitability of shrimp growth.

[0035] Significantly improving the oxygen transfer efficiency: Adopting a propeller-assisted aeration device and combining with an inclined blade design, it greatly increases the contact area of the water-gas interface, improves the oxygen dissolution efficiency, reduces oxygen loss, and significantly improves the dissolved oxygen supply capacity per unit energy consumption;

[0036] Reducing system energy consumption: By dynamically controlling the pump lift and water flow rate and introducing an optimized energy consumption algorithm, this component can minimize power consumption while maintaining efficient oxygen supply, thus achieving energy-saving operation and reducing aquaculture costs. Description of the drawings

[0037] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0038] Figure 2 It is a three-dimensional structure schematic diagram of the pool body cross-section of the present invention;

[0039] Figure 3 It is a schematic diagram of the net cage installation structure of the present invention;

[0040] Figure 4Schematic diagram of the drive structure of the present invention;

[0041] Figure 5 Schematic diagram of the positioning structure of the present invention;

[0042] Figure 6 Schematic diagram of the positioning structure of the present invention.

[0043] Reference numerals:

[0044] 1, pond body; 2, aeration pipe; 3, sewage discharge pipe; 4, guide rail; 5, positioning structure; 501, spiral ring; 502, ring block; 503, extrusion block; 504, spring; 505, U-shaped block; 506, rotating groove; 507, friction pipe; 508, rotating shaft; 6, base; 7, reel; 8, positioning rod; 9, sliding rod; 10, side plate; 11, slider; 12, net cage; 13, porous seat; 14, hanging ear; 15, aeration head; 16, sewage discharge port; 17, valve; 18, gear; 19, gear ring; 20, motor. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] Embodiment 1

[0047] As Figures 1-6 shown, a prawn biological contact oxidation pond and its lift assembly proposed by the present invention include a pond body 1, a positioning structure 5, a base 6, a sliding rod 9, a net cage 12 and a porous seat 13. An inlet is provided on one side of the pond body 1, and an outlet is provided on the other side of the pond body 1. The inlet and the outlet are connected to the lift assembly;

[0048] Porous seats 13 are equidistantly arranged inside the pond body 1, and a net cage 12 is placed on the porous seat 13. An aeration structure and a sewage discharge structure are respectively provided on the net cage 12 and the porous seat 13. The aeration structure is composed of an aeration pipe 2 and an aeration head 15. The aeration pipe 2 is arranged at the lower end of the pond body 1, and the aeration heads 15 are equidistantly arranged on the aeration pipe 2. The aeration heads 15 penetrate through the porous seat 13 and are inserted into the inside of the net cage 12. The aeration structures of each row of net cages 12 are interconnected. During the process of prawn cultivation, the lift assembly is connected so that air is aerated to the inside of the cultivation pond through the aeration heads 15;

[0049] The inside of the net cage 12 is filled with granular biological fillers. The inner diameters of the mesh holes of the net cage 12 and the porous seat 13 are smaller than the particle diameters of the biological fillers. During the first batch of shrimp farming, the biological fillers are first filled into the net cage 12. The high-density biological fillers have a large specific surface area, which can provide a large amount of space for aerobic microorganisms to attach and grow. The microorganisms attach to the surface of the fillers to form a biofilm, which directly participates in the degradation reaction of organic pollutants in the water body, improving the purification efficiency of the oxidation pond. Through its special pore structure, the high-density fillers can promote gas-liquid exchange and increase the solubility of oxygen in the water body, enhancing the oxygen transfer rate and providing sufficient oxygen for the aerobic microorganisms on the biofilm, thereby enhancing the biochemical reaction rate.

[0050] Then, the live shrimp seedlings are respectively cultured in each net cage 12, and the culture pond is divided into various areas, which facilitates the personnel to carry out the fishing operation on the shrimp.

[0051] The base 6 is slidably arranged above the pond body 1 through a sliding structure. The sliding structure is composed of a guide rail 4, a positioning rod 8, a sliding rod 9, a side plate 10 and a slider 11. The guide rail 4 is arranged on the upper surface of the pond body 1, the slider 11 is slidably arranged on the guide rail 4, the side plate 10 is arranged at the top of the slider 11, the positioning rod 8 and the sliding rod 9 are arranged between the side plates 10, the positioning rod 8 is directly below the sliding rod 9, and the base 6 is slidably inserted on the positioning rod 8 and the sliding rod 9. After the shrimp in the culture pond mature, the water level in the culture pond is lowered. The personnel stand on the middle porous seat 13, and through the sliding cooperation of the guide rail 4 and the slider 11, the reel 7 moves to the designated position.

[0052] A reel 7 is rotatably arranged on the base 6 through a driving structure. The driving structure is composed of a gear 18, a gear ring 19 and a motor 20. One end of the gear ring 19 is arranged on the outer wall of the reel 7 and is rotationally connected to the base 6. The motor 20 is arranged on the base 6. The gear 18 is arranged at the output end of the motor 20. The gear 18 meshes with the teeth of the gear ring 19. Subsequently, an external power supply is connected, and the motor 20 works to drive the gear 18 to rotate, thereby controlling the reverse rotation of the reel 7. Hanging ears 14 are symmetrically arranged on the outer wall of the upper end of the net cage 12. A pulling rope is wound on the reel 7. Two hooks are arranged at the end of the pulling rope. The hooks are adapted to the hanging ears 14. Thereby, the pulling rope of the reel 7 is unwound, and the hooks are hung on the hanging ears 14. Subsequently, the reel 7 is controlled to rotate forward, thereby winding the pulling rope. At this time, the net cage 12 is lifted, and the biological fillers in the net cage 12 leak into the porous seat 13, that is, only the mature shrimp are left in the net cage 12, which facilitates the personnel to carry out the fishing operation on the shrimp.

[0053] The positioning structure 5 is provided at the end of the base 6. The positioning structure 5 is composed of a spiral ring 501, a ring block 502, a pressing block 503, a spring 504, a U-shaped block 505, a rotating groove 506, a friction tube 507 and a rotating shaft 508. The friction tube 507 is provided on the outer wall of the base 6. The sliding rod 9 penetrates through the inside of the friction tube 507. The rotating grooves 506 are symmetrically opened on the inner wall of the friction tube 507. The rotating shaft 508 is rotatably provided in the rotating groove 506. The middle part of the U-shaped block 505 is provided on the rotating shaft 508;

[0054] The spiral ring 501 is threadedly provided on the outer wall of the friction tube 507. The ring block 502 is coaxially rotatably provided in the spiral ring 501. The pressing blocks 503 are symmetrically provided on the ring block 502. The pressing blocks 503 are located between the inner wall of the friction tube 507 and the U-shaped block 505. The spring 504 presses and positions the U-shaped block 505. The positioning structure 5 can ensure the stable position of the base 6 on the sliding rod 9. The specific operation is as follows:

[0055] When the base 6 slides to the specified position, rotate the spiral ring 501. Through the threaded engagement action of the spiral ring 501 and the friction tube 507, the ring block 502 is driven to approach the friction tube 507, converting the rotational action of the spiral ring 501 into a linear action of the pressing block 503. At this time, the inclined surface of the pressing block 503 presses one end of the U-shaped block 505, and the U-shaped block 505 deflects along the rotating shaft 508, so that this end of the U-shaped block 505 abuts against the outer wall of the sliding rod 9. The positioning operation of the base 6 can be completed under the action of friction;

[0056] When the U-shaped block 505 deflects, the other end of the U-shaped block 505 presses the spring 504 to cause it to deform. When the pressing block 503 moves away from the U-shaped block 505, the U-shaped block 505 automatically resets and moves away from the sliding rod 9 under the elastic force of the spring 504.

[0057] The inner wall of the friction tube 507 is designed to be square. The plane of the pressing block 503 is in sliding contact with the inner wall of the friction tube 507. The pressing block 503 is restricted by the friction tube 507 and does not produce a deflection action.

[0058] One end of the spring 504 is provided in the rotating groove 506, and the other end of the spring 504 is provided on the U-shaped block 505. The original length of the spring 504 is greater than the depth of the rotating groove 506. By restricting the length of the spring 504, it is ensured that there is sufficient elastic force to make the U-shaped block 505 reset.

[0059] The sewage discharge structure consists of a sewage discharge pipe 3, a sewage discharge port 16, and a valve 17. The sewage discharge pipe 3 is provided at the lower end of the pond body 1. The sewage discharge port 16 is opened at the bottom end of the inner wall of the porous seat 13. The valve 17 is provided in the sewage discharge port 16. The sewage discharge port 16 is connected to the sewage discharge pipe 3. The sewage discharge structures of each row of cages 12 are interconnected. When the shrimps have been cultured for three to five batches, the biological filler needs to be replaced. At this time, the cage 12 is moved away from the porous seat 13 through the above-mentioned operation control. The biological filler is in the porous seat 13. At this time, the valve 17 of the sewage discharge port 16 is opened, and the biological filler in the porous seat 13 enters the sewage discharge pipe 3 through the sewage discharge port 16. The sewage discharge pipe 3 is connected to the flushing water flow to wash away the biological filler. By repeating this process, the cleaning of the biological filler is completed, and then new biological filler can be replaced.

[0060] Embodiment 2

[0061] A prawn biological contact oxidation pond and its lift component proposed by the present invention. Compared with Embodiment 1, this embodiment further includes: the lift component includes a distributed lift module, a water flow regulation system, a propeller-assisted oxygenation device, an intelligent control unit, and a real-time monitoring system, which can dynamically adjust the dissolved oxygen concentration by optimizing the lift height and water flow velocity.

[0062] The distributed lift module consists of multiple independent lift units. Each lift unit is equipped with a water pump, a lift regulating valve, and an oxygen sensor. By adjusting the opening degree change of the valve, the lift height of the water pump is controlled to meet the dissolved oxygen requirements of different areas of the oxidation pond. The formula is expressed as:

[0063]

[0064] Where:

[0065] Basic part: H base : Basic lift height. It represents the minimum lift required to maintain the water circulation of the system under standard conditions.

[0066] Dynamic adjustment part: ΔH i : Dynamic lift adjustment value. It is dynamically calculated based on the real-time monitoring data in the oxidation pond (such as dissolved oxygen concentration and water quality parameters). For example:

[0067] ΔH i =K d (C DO,i -C target )

[0068] C DO,i : Dissolved oxygen concentration monitored by the i-th lift module.

[0069] C target : Target dissolved oxygen concentration.

[0070] K d:Dynamic adjustment coefficient, used to adjust sensitivity.

[0071] Water flow velocity related term:

[0072] The influence term of water flow velocity on lift height.

[0073] Q i : The water flow rate of the i-th module.

[0074] A i : The cross-sectional area of the lift pipe. This term indicates the additional influence of water flow velocity on lift, usually increasing with the square of the velocity.

[0075] Pipeline loss related term:

[0076] k f L i : Pipeline resistance loss term.

[0077] k f : Friction coefficient, depending on the pipeline material and water flow state (such as laminar flow or turbulent flow).

[0078] L i : The pipeline length of the i-th module. It means that the longer the distance the water pump lifts water into the pool, the greater the resistance loss.

[0079] This formula comprehensively considers various factors such as the basic lift height, dynamic adjustment, flow velocity change, and pipeline loss. The basic lift provides the minimum guarantee for maintaining water circulation. The dynamic adjustment term flexibly responds to the oxygen supply requirements in different regions according to the real-time dissolved oxygen demand, ensuring uniform oxygen distribution in the pool. The flow velocity influence term simulates the additional demand of water flow velocity on lift, indicating that high-speed water flow will increase the lift burden of the system. The pipeline resistance loss term considers the consumption of the water pump lift by long-distance pipeline transportation, making the formula closer to the actual operating conditions.

[0080] The distributed lift modules achieve coordinated operation through network communication. The information interaction of each module adjusts its own lift height through centralized calculation to optimize the overall system performance and effectively reduce the operation differences between modules. The lift deviation between modules is minimized through the objective function:

[0081]

[0082] Where is the average lift of the whole pool.

[0083] The water flow regulation system combines water flow monitoring and automatic control functions. It can detect the water flow rate in the oxidation pond in real time and maintain the optimal water circulation conditions by adjusting the output power of the water pump to ensure the ecological balance of the shrimp farming pond. The water flow regulation system monitors the water flow rate Q in real time through a liquid flow meter and is based on the water pump power optimization formula:

[0084] P pump = ρgQH / η

[0085] Where:

[0086] P pump : Water pump power.

[0087] ρ: Density of water.

[0088] g: Acceleration due to gravity.

[0089] η: Water pump efficiency.

[0090] Automatically adjust the water flow speed and the output power of the pump.

[0091] The propeller-assisted aeration device is set in the head module. Through the high-speed rotation of the propeller, the water body is fully contacted with the air, thereby effectively increasing the dissolved oxygen content in the water; the propeller blades are designed in an inclined form to further increase the contact area between water and gas and improve the aeration efficiency. The blade surface area with an inclined angle θ satisfies the formula:

[0092] A interface = πR 2 sin(θ)

[0093] Where:

[0094] A interface : Water-gas interface area.

[0095] R: Propeller radius.

[0096] θ: Blade inclination angle.

[0097] The intelligent control unit has precise monitoring and regulation functions. It can collect key parameters such as dissolved oxygen concentration, water temperature, and water flow rate in the oxidation pond in real time and perform dynamic regulation based on the difference between the preset target concentration and the actual concentration to achieve precise oxygen supply. The intelligent control unit uses the PID control algorithm to adjust the deviation between the dissolved oxygen concentration and the target concentration in the oxidation pond in real time. Its control signal is expressed as:

[0098]

[0099] Where:

[0100] u(t): Control signal.

[0101] e(t): Deviation value (the difference between the target dissolved oxygen concentration and the actual concentration).

[0102] K p 、K i 、K d : Proportional, integral, and derivative coefficients.

[0103] The intelligent control unit and the distributed head module work together to optimize the oxygen transfer rate in the water body in real time, ensure uniform distribution of dissolved oxygen in different areas of the oxidation pond, and avoid hypoxia or over-oxygenation problems in local areas. The intelligent control unit and the distributed head module are combined to optimize the mass transfer rate formula:

[0104] R t =k L a(C s -C t )

[0105] Where:

[0106] k L a: Liquid film mass transfer coefficient.

[0107] C s : Saturated dissolved oxygen concentration in water.

[0108] C t : Real-time dissolved oxygen concentration.

[0109] The real-time monitoring system collects data such as dissolved oxygen concentration, water flow rate, and water temperature in the oxidation pond in real time through a multi-parameter sensor network. The monitoring results are transmitted to the central control unit as digital signals for dynamic analysis and adjustment to ensure the high efficiency and stability of the system operation. The data is processed through Fourier transform:

[0110]

[0111] Thereby used to analyze the dynamic changes in water quality.

[0112] The head component has an energy consumption optimization function. By comprehensively considering the pump power consumption, mass transfer efficiency, and oxygen utilization rate in the water body, it dynamically adjusts the operating state of the head component to achieve an energy-efficient operation mode. It is based on the Lagrangian optimization function:

[0113] L=P pump +λ(C s -C DO )

[0114] Where:

[0115] λ: Lagrange multiplier, used to balance power and dissolved oxygen demand.

[0116] Automatically balance the power consumption and dissolved oxygen demand of the lift component.

[0117] The overall performance of this lift component is evaluated by the net energy efficiency ratio (NER):

[0118]

[0119] Where:

[0120] C removal : The concentration of pollutants removed per unit time.

[0121] P total : The total power consumption of the system.

[0122] This lift component design significantly improves the oxygen supply efficiency and energy consumption ratio of the prawn biological contact oxidation pond by combining mathematical optimization, distributed regulation, and intelligent control technologies, while ensuring stable water quality and meeting the requirements of modern aquaculture.

[0123] The above specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0124] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A prawn biological contact oxidation tank, comprising a tank body (1), a positioning structure (5), a base (6), a sliding rod (9), a net box (12) and a porous seat (13), characterized in that: One side of the pool body (1) is provided with a water inlet, and the other side of the pool body (1) is provided with a water outlet. Porous seats (13) are equidistantly arranged inside the pool body (1). A net box (12) is placed on the porous seats (13). Aeration structures and sewage discharge structures are respectively arranged on the net box (12) and the porous seats (13). The inside of the net box (12) is filled with granular biological fillers; The base (6) is slidably arranged above the pool body (1) through a sliding structure, and a reel (7) is rotatably arranged on the base (6) through a driving structure; The positioning structure (5) is arranged at the end of the base (6). The positioning structure (5) is composed of a spiral ring (501), a ring block (502), an extrusion block (503), a spring (504), a U-shaped block (505), a rotating groove (506), a friction tube (507) and a rotating shaft (508). The friction tube (507) is arranged on the outer wall of the base (6). The sliding rod (9) penetrates through the inside of the friction tube (507). The rotating grooves (506) are symmetrically arranged on the inner wall of the friction tube (507). The rotating shaft (508) is rotatably arranged in the rotating grooves (506). The middle part of the U-shaped block (505) is arranged on the rotating shaft (508); The spiral ring (501) is threadedly arranged on the outer wall of the friction tube (507). The ring block (502) is coaxially rotatably arranged in the spiral ring (501). The extrusion blocks (503) are symmetrically arranged on the ring block (502). The extrusion blocks (503) are located between the inner wall of the friction tube (507) and the U-shaped block (505). The spring (504) squeezes and positions the U-shaped block (505).

2. The biological contact oxidation pond for penaeid prawn according to claim 1, wherein: The aeration structure is composed of an aeration pipe (2) and an aeration head (15). The aeration pipe (2) is arranged at the lower end of the pool body (1). The aeration heads (15) are equidistantly arranged on the aeration pipe (2). The aeration heads (15) penetrate through the porous seats (13) and are inserted into the inside of the net box (12). The aeration structures of each row of net boxes (12) are interconnected; The sewage discharge structure is composed of a sewage discharge pipe (3), a sewage discharge port (16) and a valve (17). The sewage discharge pipe (3) is arranged at the lower end of the pool body (1). The sewage discharge port (16) is opened at the bottom end of the inner wall of the porous seat (13). The valve (17) is arranged in the sewage discharge port (16). The sewage discharge port (16) is connected to the sewage discharge pipe (3). The sewage discharge structures of each row of net boxes (12) are interconnected.

3. The biological contact oxidation pond for penaeid prawn according to claim 1, characterized in that: The sliding structure is composed of a guide rail (4), a positioning rod (8), a sliding rod (9), a side plate (10) and a slider (11). The guide rail (4) is arranged on the upper surface of the pool body (1). The slider (11) is slidably arranged on the guide rail (4). The side plate (10) is arranged at the top of the slider (11).

4. The biological contact oxidation pond for prawns according to claim 3, characterized in that: The positioning rod (8) and the sliding rod (9) are arranged between the side plates (10). The positioning rod (8) is directly below the sliding rod (9). The base (6) is slidably inserted on the positioning rod (8) and the sliding rod (9).

5. A prawn biological contact oxidation pond according to claim 1, characterized in that: The driving structure is composed of a gear (18), a gear ring (19) and a motor (20). One end of the gear ring (19) is arranged on the outer wall of the reel (7) and is rotatably connected to the base (6). The motor (20) is arranged on the base (6). The gear (18) is arranged at the output end of the motor (20). The gear (18) is in meshing engagement with the gear teeth of the gear ring (19).

6. The biological contact oxidation pond for penaeid prawn according to claim 1, characterized in that: The inner wall of the friction tube (507) is designed to be square. The plane of the extrusion block (503) is in sliding contact with the inner wall of the friction tube (507).

7. The biological contact oxidation pond for penaeid prawns according to claim 1, wherein: One end of the spring (504) is arranged in the rotating groove (506). The other end of the spring (504) is arranged on the U-shaped block (505). The original length of the spring (504) is greater than the depth of the rotating groove (506).

8. The biological contact oxidation pond for penaeid prawn according to claim 1, wherein: Hanging ears (14) are symmetrically arranged on the outer wall at the upper end of the net cage (12). A pulling rope is wound on the reel (7). Two hooks are arranged at the end of the pulling rope. The hooks are adapted to the hanging ears (14).

9. The biological contact oxidation pond for prawns according to claim 1, characterized in that: The inner diameters of the mesh holes of the net cage (12) and the porous seat (13) are smaller than the particle diameter of the biological filler.

10. A lift component of a prawn biological contact oxidation pond, characterized in that: The lift component includes a distributed lift module, a water flow regulation system, a propeller-assisted oxygenation device, an intelligent control unit and a real-time monitoring system, which can dynamically adjust the dissolved oxygen concentration by optimizing the lift height and water flow rate; The distributed lift module is composed of multiple independent lift units. Each lift unit is equipped with a water pump, a lift regulating valve and an oxygen sensor. The lift height of the water pump is regulated by adjusting the opening of the valve, so as to meet the dissolved oxygen requirements of different areas of the oxidation pond. The distributed lift modules operate in coordination through network communication. The information interaction of each module adjusts its own lift height by means of centralized calculation to optimize the overall system performance and effectively reduce the operation differences between modules; The water flow regulation system combines water flow monitoring and automatic control functions, can detect the water flow rate in the oxidation pond in real time, and maintains the best water circulation conditions by adjusting the output power of the water pump to ensure the ecological balance of the shrimp farming pond; The propeller-assisted oxygenation device is arranged in the lift module. Through the high-speed rotation of the propeller, the water body is fully contacted with the air, so as to effectively increase the dissolved oxygen content in the water. The propeller blades are designed in an inclined form to further increase the contact area between water and gas and improve the oxygenation efficiency; The intelligent control unit has precise monitoring and adjustment functions, can collect key parameters such as dissolved oxygen concentration, water temperature, water flow rate, etc. in the oxidation pond in real time, and performs dynamic adjustment based on the difference between the preset target concentration and the actual concentration to achieve precise oxygen supply; The intelligent control unit works in coordination with the distributed lift module to optimize the oxygen transfer rate in the water body in real time, ensure the uniform distribution of dissolved oxygen in different areas of the oxidation pond, and avoid the problems of hypoxia or over-oxygenation in local areas; The real-time monitoring system collects data such as dissolved oxygen concentration, water flow rate, water temperature, etc. in the oxidation pond in real time through a multi-parameter sensor network. The monitoring results are transmitted to the central control unit in digital signals for dynamic analysis and adjustment to ensure the high efficiency and stability of the system operation; The system has an energy consumption optimization function. By comprehensively considering the pump power consumption, mass transfer efficiency, and oxygen utilization rate in the water body, it dynamically adjusts the operating state of the lift component to achieve an energy-efficient operation mode.

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