Modular, movable seawater aquaculture tail water integrated treatment device and method

Abstract

This invention relates to the field of marine aquaculture wastewater treatment technology, and discloses a modular, mobile integrated marine aquaculture wastewater treatment device and method. A spiral tube is fixedly connected to the inner side of the coagulation cylinder, and a collection box is arranged at intervals along the pitch of one side of the spiral tube. This invention achieves a positive correlation between the deflection angle of the deflection plate and the water pressure; the higher the water pressure, the larger the deflection angle, and the wider the gap between the sealing plate and the box wall, thus increasing the amount of coagulant added. When the water pressure decreases, the torsion spring resets, the gap narrows, and the amount of coagulant added automatically decreases. Based on real-time water pressure feedback, the coagulant addition is dynamically controlled without external electrical control intervention, achieving dynamic adaptive control, significantly improving the efficiency of coagulation in removing colloids and fine suspended solids, reducing pollutant emissions from aquaculture wastewater, ensuring compliant discharge and resource reuse, and providing a guarantee for the green development of the marine aquaculture industry.

Description

Technical Field

[0001] This invention relates to the field of marine aquaculture wastewater treatment technology, specifically to a modular, mobile integrated marine aquaculture wastewater treatment device and method. Background Technology

[0002] With the continuous expansion of global mariculture, the issue of wastewater treatment has become increasingly prominent. It is crucial for maintaining the marine ecological balance and ensuring the sustainable development of the mariculture industry. Currently, with the continuous growth in demand for aquatic products, the scale of the mariculture industry is constantly expanding. The wastewater generated during the mariculture process contains unused feed residues, fish excrement, and other pollutants. If these substances are discharged directly into the sea without effective treatment, they will seriously affect the water quality of adjacent sea areas. Aquaculture wastewater is one of the main sources of pollution in nearshore waters, which may lead to frequent ecological disasters such as eutrophication and red tides. Therefore, it is necessary to treat mariculture wastewater to maintain the marine ecological balance. The use of coagulants can significantly improve the removal rate of colloids and fine suspended solids. However, the dosage of coagulants needs to be optimized according to the actual situation. Moreover, the coagulation effect is affected by a variety of factors such as the dosage of coagulants, stirring intensity, and reaction time. Optimizing these parameters can significantly improve the coagulation efficiency. Currently, in marine aquaculture environments lacking external power or electrical control systems, the dosage of coagulant is fixed when added, making it impossible to adapt to fluctuations in water quality and quantity, and thus impossible to match the optimal dosage. Furthermore, manual feeding is prone to interruption, and the distribution of the agent is uneven, making it impossible to achieve continuous and uniform drug supply. In addition, the coagulant is not fully mixed with the water flow, resulting in local concentrations that are too high or too low, which affects the coagulation treatment effect. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a modular and mobile integrated treatment device and method for marine aquaculture wastewater. It solves the problems of fixed dosage of coagulant in marine aquaculture environments lacking external power or electrical control systems, which cannot adapt to fluctuations in water quality and quantity, cannot match the optimal dosage, are prone to interruption of manual feeding, have uneven distribution of chemicals, cannot achieve continuous and uniform chemical supply, and have insufficient mixing of coagulant with water flow, resulting in local concentrations that are too high or too low, affecting the coagulation treatment effect.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a modular and mobile integrated treatment device for seawater aquaculture tailwater, comprising a coagulation cylinder and a treatment cylinder, wherein the treatment cylinder is installed on one side of the coagulation cylinder, the coagulation cylinder removes colloids and micro suspended solids through coagulation, the treatment cylinder degrades residual organic matter using a biofilm method, an inner rotating cylinder is rotatably connected to the inner side of the treatment cylinder, a sedimentation hopper is connected to the bottom end of the coagulation cylinder, and the coagulation cylinder and the treatment cylinder are connected by a connecting water pipe; A spiral tube is fixedly connected to the inner side of the coagulation cylinder. A collection box is provided at intervals along the pitch of one side of the spiral tube. A rotating cylinder is rotatably connected to the inner side of the collection box. The rotating cylinder rotates along the wall of the collection box through a movable shaft in the middle of its inner side. A torsion spring is sleeved on the outer side of the movable shaft. The torsion spring provides a preload force to resist the water flow pressure. A deflection plate is connected to the side of the rotating cylinder along its inclined direction. A sealing plate is connected to the bottom of the deflection plate along its horizontal direction. A connecting plate is connected to the bottom of the sealing plate. A water-receiving plate is connected to the bottom of the connecting plate. The water-receiving plate is located inside the spiral tube. Drainage holes are evenly opened inside the water-receiving plate. The top side of the collection box is connected to a connecting pipe, the inlet end of the connecting pipe is connected to a main pipe, and the top of the main pipe is connected to an accumulation cylinder.

[0005] As a preferred embodiment of the present invention, a water inlet pipe is connected to one side of the top of the coagulation cylinder, a sewage discharge pipe is connected to the bottom of the sedimentation hopper, and a water pump is installed at the water inlet end of the connecting water pipe.

[0006] As a preferred embodiment of the present invention, the bottom of the treatment cylinder is connected to a storage cylinder, and a water outlet pipe is connected to one side bottom of the storage cylinder. An installation grid is installed on the inner side of the inner rotating cylinder, and a filler layer is embedded in the inner side of the installation grid. A filling groove is provided inside the installation grid, and the filler layer is tightly placed in the filling groove. Fine holes are evenly provided on both sides of the installation grid. The water inlet end of the spiral tube is connected to the water inlet pipe.

[0007] As a preferred embodiment of the present invention, guide strips are equidistantly connected on the inclined surface of the deflection plate, and a dispersion groove is provided on the top of the sealing plate between two adjacent guide strips. The end of the sealing plate is provided with a rounded convex structure, and the end of the sealing plate is in close contact with the wall of the collection box. A top cover is provided on the top of the collection box, and both the collection box and the storage cylinder are filled with coagulant. A solenoid valve is connected to the top of the main pipe. The deflection plate is deflected torsionally along the wall of the collection box via a rotating cylinder, a movable shaft, and a torsion spring.

[0008] As a preferred embodiment of the present invention, a connecting air box is provided at intervals along the pitch of the other side of the spiral tube. The connecting air box is arranged opposite to the collection box. An air pipe is connected to the top of the connecting air box, and one end of the air pipe is connected to the manifold. The bottom of the connecting air box is connected to a guide tube, and the inner side of the spiral tube is rotatably connected to a rotating shaft located directly below the connecting air box. Rotating blades are evenly arranged on the outer side of the rotating shaft.

[0009] As a preferred embodiment of the present invention, the air inlet of the manifold is connected to an external air pump, the air outlet of the guide tube is directly opposite the rotating blade, and the rotating blade rotates inside the spiral tube via a rotating shaft.

[0010] As a preferred technical solution of the present invention, a drive gear is provided at the top edge of the inner rotating cylinder, and a drive gear is connected to one side edge of the drive gear through gear meshing. The drive gear is connected to the transmission shaft of the motor, and the motor is fixedly installed at the top of the processing cylinder. The inner rotating cylinder has a connecting pipe seat at the outlet of the connecting water pipe in the middle of its inner side. The connecting pipe seat is stably supported by the support frame at the top of the treatment cylinder. The bottom of the connecting pipe seat is connected to a central pipe at the center of the packing layer. A diversion side plate is provided on the side of the central pipe along its circumference. Water spray heads are equidistantly connected to the side of the diversion side plate. An interception net is installed at the bottom of the inner rotating cylinder.

[0011] As a preferred embodiment of the present invention, the top and bottom of the processing cylinder are provided with annular tracks, and the top and bottom edges of the inner rotating cylinder are provided with guide blocks corresponding to the annular tracks. The inner rotating cylinder rotates stably along the inner side of the processing cylinder through the guide blocks and the annular tracks.

[0012] As a preferred embodiment of the present invention, the mounting grid and packing layer are provided in six sets, and multiple sets of mounting grids are installed on the inner wall of the inner rotating cylinder at equal angles along the circumferential direction. The mounting grid and packing layer are arranged in the inner rotating cylinder at a 60° angle with the horizontal plane. The diversion side plate is provided in three sets.

[0013] A modular and mobile integrated treatment method for marine aquaculture wastewater includes the following steps: Step 1, coagulation treatment: During the process of transporting aquaculture wastewater along the spiral tube, the coagulant in the collection box flows downwards, so that the coagulant and water flow are fully mixed when the water flows through the inside of the spiral tube. Step 2, mixing treatment: The water pressure inside the spiral tube drives the rotating blade to rotate, and the air pressure delivered by the guide tube helps to accelerate the rotation of the rotating blade and cooperate with the airflow to achieve mixing of coagulant and water. Step 3, sedimentation treatment: Use a sedimentation tank to accumulate sediment, and then discharge the waste through a drain pipe; Step 4, diversion and delivery: The tailwater is delivered to the central pipe through the connecting water pipe and water pump. Based on the diversion side plate and water nozzle, the water flow is then evenly sprayed onto the packing layer from multiple directions to ensure full contact. Step 5, Biofilm treatment: Based on the gear drive mechanism, the inner rotating cylinder rotates inside the treatment cylinder, so that the packing layer rotates synchronously and comes into contact with the water for treatment; Step 6, Filtration and Discharge: After water treatment, the wastewater is intercepted by a net and then stored in a collection tank before being discharged through an outlet pipe.

[0014] Compared with existing technologies, the present invention provides a modular and mobile integrated treatment device and method for marine aquaculture wastewater, which has the following advantages: 1. By integrating the coagulation cylinder and the treatment cylinder into a series structure, the coagulation cylinder removes colloids and fine suspended solids through coagulation. Then, the treatment cylinder uses a biofilm method to degrade residual organic matter through the packing layer inside. This integrated combination achieves synergistic treatment of physical coagulation and biodegradation. The spiral tube arranged in a spiral shape on the inner wall of the coagulation cylinder forms a flow channel that extends the hydraulic residence time. A collection box is set on the spiral tube. The deflection plate is limited by a torque response mechanism composed of a rotating cylinder, a movable shaft, and a torsion spring. Water pressure acts on the water-facing plate, driving it to deflect. The water-facing plate is linked to the deflection plate through a connecting plate, so that the deflection plate overcomes the pre-tightening torque of the torsion spring and drives the sealing plate to disengage from the opening of the collection box wall. This allows the coagulant stored in the collection box to be released downward through the opening and mix with the water flow in the pipe in real time. This allows the coagulant to be fully mixed with the water flow, improving the effect of subsequent coagulation treatment. Furthermore, the deflection angle of the deflector plate is positively correlated with the water pressure. The higher the water pressure, the larger the deflection angle, and the wider the gap between the sealing plate and the box wall. The amount of coagulant added increases accordingly. When the water pressure decreases, the torsion spring resets, the gap narrows, and the amount of coagulant added automatically decreases. Based on real-time water pressure feedback, the dynamic addition and control of coagulant can be achieved without external electrical control intervention, thus significantly improving the efficiency of coagulation in removing colloids and fine suspended solids, reducing pollutant emissions from aquaculture wastewater, ensuring compliance with emission standards and resource reuse, and providing a guarantee for the green development of the marine aquaculture industry.

[0015] 2. The collection box and the accumulation cylinder are connected by the connecting pipe and the main pipe, forming an automatic replenishment path for the accumulation cylinder, the main pipe, the connecting pipe, and the collection box. This allows the coagulant accumulated in the accumulation cylinder to be automatically replenished to the collection box under gravity, achieving timely replenishment and unattended continuous feeding, completely eliminating the risk of interruption in addition. Based on the guide strips evenly arranged on the inclined surface of the deflection plate, combined with the dispersion groove formed on the sealing plate, it is convenient for the coagulant to flow through the inclined surface during addition. The guide bar cuts and splits the flow into multiple fine streams, and the dispersion tank further divides the fine streams into even finer bundles, so that the coagulant falls into the spiral tube in a multi-evenly distributed form, rather than being poured in a concentrated manner, thereby improving the uniformity of the mixing between the coagulant and the water flow. The water-receiving plate has evenly distributed drainage holes inside. When the water carrying the coagulant passes through the drainage holes, the hole walls exert a cutting and shearing effect on the water flow, breaking the originally continuous stream into a fine turbulent flow, thereby achieving secondary homogenization of water and coagulant and ensuring the adequacy of subsequent coagulation.

[0016] 3. By setting a connecting air box on the side of the spiral tube corresponding to the collection box, the external air source is connected to the manifold through the air pipe and then introduced into the connecting air box. The connecting air box accurately sprays compressed gas onto the working surface of the rotating blade installed on the rotating shaft through the guide pipe. The rotating blade is installed inside the spiral tube through the rotating shaft. Its power source has a dual superposition mechanism of active power and auxiliary power: the active power is directly impacted by the water flow pressure in the spiral tube, driving the rotating blade to rotate. The auxiliary power is superimposed on the blade by the airflow pressure injected through the guide pipe, accelerating the rotation speed of the rotating blade. The rotation of the rotating blade realizes mechanical stirring, so that the blade rotation actively shears and stirs the water flow carrying coagulant, breaks the laminar flow boundary, and promotes full contact between water and coagulant. Based on the additional turbulence generated by the bubbles introduced by the guide pipe during the rising process, a three-phase mixing and strengthening zone of gas, water and coagulant is formed through airflow stirring. At the same time, the rotational resistance of the rotating blade slows down the water flow delivery speed, prolongs the effective reaction time of the coagulant in the spiral tube, and realizes flow rate regulation. By coupling air and water for stirring and actively controlling the flow rate, the three key parameters of stirring intensity, reaction time, and dosage are synergistically optimized, which significantly improves coagulation efficiency, ensures sufficient floc growth, and enhances overall treatment performance.

[0017] 4. An inner rotating cylinder is installed inside the treatment cylinder. The inner rotating cylinder is driven to rotate stably inside the treatment cylinder by means of a ring track, guide block, drive gear, drive gear and motor. Six sets of grids are evenly installed on the inner side of the inner rotating cylinder along the circumferential direction. Each set of grids is filled with a packing layer. The packing layer is arranged at an inclination. The pre-treated water from the coagulation cylinder is transported to the diversion side plate through the central pipe. The diversion side plate is set with three sets along the circumferential direction. Each set is arranged with multiple sets of water spray heads in the vertical direction. The water flows through the multiple sets of water spray heads and sprays evenly onto the surface of the rotating packing layer from multiple directions and multiple heights to achieve multi-directional and multi-point water distribution. When the inclined packing layer is impacted by the water flow, the kinetic energy of the water flow is converted into tangential thrust, which helps to drive the inner rotating cylinder to rotate. Together with the motor, it forms a composite drive mode of electric + hydraulic power to reduce energy consumption. By using rotating dynamic contact to improve biofilm utilization, multi-directional uniform water distribution to ensure balanced treatment load distribution, and hydraulic-assisted drive to reduce energy consumption, the packing layer is ensured to efficiently and synchronously treat water flow, thereby improving the treatment efficiency and operational economy of the biodegradation stage of marine aquaculture tailwater. At the same time, the three-group flow side plates correspond to six groups of packing layers in a 1:2 ratio. The multi-layer spray heads on each group flow side plate ensure that the water flow uniformly covers the entire height of the packing layer in the vertical direction, avoiding local short-circuiting or dead zones, and ensuring that multiple packing layers can simultaneously and effectively treat the water flow. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2This is a schematic diagram of the structure of the coagulation cylinder of the present invention.

[0020] Figure 3 This is a schematic diagram of the spiral tube structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the air box connected to the present invention.

[0022] Figure 5 This is a schematic diagram of the material collection box of the present invention.

[0023] Figure 6 This is a schematic diagram of the deflection plate of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the processing cylinder of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the inner rotating cylinder of the present invention.

[0026] Figure 9 This is a schematic diagram of the structure of the centralized pipe of the present invention.

[0027] Figure 10 This is a cross-sectional view of the arrangement of the packing layer and the flow divider side plate of the present invention.

[0028] Figure 11 This is a flowchart of the processing method of the present invention.

[0029] In the diagram: 1. Coagulation cylinder; 2. Treatment cylinder; 3. Inlet pipe; 4. Outlet pipe; 5. Sedimentation hopper; 6. Sewage pipe; 7. Connecting water pipe; 8. Water pump; 9. Accumulation cylinder; 10. Spiral tube; 11. Collection box; 12. Top cover; 13. Rotary drum; 14. Movable shaft; 15. Torsion spring; 16. Deflection plate; 17. Sealing plate; 18. Connecting plate; 19. Water-receiving plate; 20. Drainage hole; 21. Guide bar; 22. Dispersion tank; 23. Connecting material pipe; 24. Main pipe; 25. Accumulation cylinder; 26. Connecting air box; 27. Air pipe; 28. Guide pipe; 29. ​​Rotating shaft; 30. Rotating blade; 31. Manifold; 32. Inner rotating cylinder; 33. Circular track; 34. Guide block; 35. Drive gear disc; 36. Drive gear; 37. Motor; 38. Mounting grid; 39. Packing layer; 40. Connecting pipe seat; 41. Support frame; 42. Central pipe; 43. Diverter side plate; 44. Spray head; 45. Interception net. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0031] In the description of this invention, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0032] In the description of this invention, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Example: Please refer to Figure 1-10The present invention provides the following technical solution: a modular and mobile integrated treatment device for seawater aquaculture tailwater, including a coagulation cylinder 1 and a treatment cylinder 2. The treatment cylinder 2 is installed on one side of the coagulation cylinder 1. The coagulation cylinder 1 removes colloids and micro suspended solids through coagulation. The treatment cylinder 2 degrades residual organic matter using a biofilm method. An inner rotating cylinder 32 is rotatably connected to the inner side of the treatment cylinder 2. A sedimentation hopper 5 is connected to the bottom end of the coagulation cylinder 1. The coagulation cylinder 1 and the treatment cylinder 2 are connected by a connecting water pipe 7. A spiral tube 10 is fixedly connected to the inner side of the coagulation cylinder 1. A collection box 11 is spaced along the pitch of the spiral tube 10 on one side of its top. The collection boxes 11 are spaced along the pitch of the spiral tube 10 and have an injection opening at the bottom. The ratio of the pitch of the spiral tube 10 to the spacing of the collection boxes 11 is 1:1-1:2, ensuring that the coagulant is added in stages throughout the tailwater transport process. A rotating cylinder 13 is rotatably connected to the inner side of the collection box 11. The rotating cylinder 13 rotates along the wall of the collection box 11 via a movable shaft 14 in its inner middle. A torsion spring 15 is sleeved on the outer side of the movable shaft 14. The torsion spring 15 is sleeved on the movable shaft 14, and its two ends abut against the side walls of the rotating cylinder 13 and the collection box 11, respectively. The torsion spring 15 provides... The preload force resisting water flow pressure keeps the sealing plate 17 sealed. The preload force of the torsion spring 15 is 0.05-0.1 MPa, ensuring that it remains sealed when the water flow pressure is below 0.05 MPa and fully opens when it is above 0.1 MPa. A deflection plate 16 is connected to the edge of the rotating drum 13 along its inclined direction. Guide strips 21 are equidistantly connected to the inclined surface of the deflection plate 16. A dispersion groove 22 is provided at the top of the sealing plate 17 between two adjacent guide strips 21. The end of the sealing plate 17 is set with a rounded convex structure. The sealing plate 17 abuts against the bottom opening of the collection box 11 through the rounded convex structure at its end, and the end of the sealing plate 17 is tightly attached to the box wall of the collection box 11. The top of the material box 11 is provided with a top cover 12, and both the material box 11 and the storage cylinder 25 are filled with coagulant, which is aluminum sulfate. The top of the main pipe 24 is connected to a solenoid valve. The deflection plate 16 is rotatably connected to the material box 11 through the rotating cylinder 13, and is provided with preload by the torsion spring 15 to maintain the sealing fit between the sealing plate 17 and the opening of the material box 11. The deflection plate 16 is torsionally deflected along the wall of the material box 11 through the rotating cylinder 13, the movable shaft 14 and the torsion spring 15, which limits the deflection of the deflection plate 16. The bottom of the deflection plate 16 is connected to the sealing plate 17 in the horizontal direction. The bottom of the sealing plate 17 is connected to the connecting plate 18, and the bottom of the connecting plate 18 is connected to the water-receiving plate 19. The water-receiving plate 19 is located inside the spiral tube 10 and extends into the spiral tube 10 to receive the water flow pressure inside the spiral tube 10, resist the pre-tightening force provided by the torsion spring 15, and drive the sealing plate 17 to disengage from the bottom opening of the collection box 11. The water-receiving plate 19 is impacted by the water flow and the pre-tightening force of the torsion spring 15 satisfies the relationship: F_water = kx•tanθ, where F_water is the water flow pressure, kx is the spring stiffness, and θ is the deflection angle, so that the opening of the injection opening is positively correlated with the water flow pressure. The water-receiving plate 19 is uniformly provided with drainage holes 20. The diameter of the drainage holes 20 is 2-5mm. The hole walls exert a shearing effect on the water flow containing coagulant, breaking the laminar flow into turbulent flow. A connecting pipe 23 is connected to the top side of the collection box 11. The feed end of the connecting pipe 23 is connected to a main pipe 24, and the top of the main pipe 24 is connected to an accumulation cylinder 25.

[0035] A water inlet pipe 3 is connected to the top side of the coagulation cylinder 1, a sewage pipe 6 is connected to the bottom of the sedimentation hopper 5, and a water pump 8 is installed at the water inlet end of the connecting water pipe 7.

[0036] The bottom of the treatment cylinder 2 is connected to the accumulation cylinder 9, and the bottom of one side of the accumulation cylinder 9 is connected to the outlet pipe 4. The inner side of the inner rotating cylinder 32 is equipped with an installation grid 38, and the inner side of the installation grid 38 is embedded with a filler layer 39. The filler layer 39 is a plastic filler, forming a biofilm with a multi-layer structure. The inside of the installation grid 38 is provided with a filling groove, and the filler layer 39 is tightly placed in the filling groove. Fine holes are evenly provided on both sides of the installation grid 38. The water inlet end of the spiral pipe 10 is connected to the water inlet pipe 3.

[0037] On the other side of the spiral tube 10, a connecting air box 26 is provided at intervals along its pitch. The connecting air box 26 is arranged opposite to the collection box 11. An air pipe 27 is connected to the top of the connecting air box 26. One end of the air pipe 27 is connected to the manifold 31. A guide tube 28 is connected to the bottom of the connecting air box 26. The guide tube 28 is connected to the air outlet end at the bottom of the air pipe 27 to guide and transport the gas delivered by the air pipe 27. A rotating shaft 29 is rotatably connected to the inner side of the spiral tube 10, located directly below the connecting air box 26. Rotating blades 30 are evenly arranged on the outer side of the rotating shaft 29. The air inlet end of the manifold 31 is connected to an external air pump. The air outlet direction of the guide tube 28 is directly opposite the rotating blades 30. The rotating blades 30 rotate inside the spiral tube 10 through the rotating shaft 29, so that the external pressure air source can be evenly distributed into the air pipe 27 by the manifold 31. Based on the airflow pressure delivered by the guide tube 28, the rotating blades 30 are accelerated to rotate.

[0038] The top and bottom of the processing cylinder 2 are provided with annular tracks 33. The top and bottom edges of the inner rotating cylinder 32 are provided with guide blocks 34 corresponding to the annular tracks 33. The inner rotating cylinder 32 rotates stably along the inner side of the processing cylinder 2 through the guide blocks 34 and the annular tracks 33, which facilitates the stable rotation of the inner rotating cylinder 32 inside the processing cylinder 2. The top edge of the inner rotating cylinder 32 is provided with a drive gear 35. One side of the drive gear 35 is connected to a drive gear 36 through gear teeth meshing. The drive gear 36 is connected to the transmission shaft of the motor 37. The motor 37 is fixedly installed on the top of the processing cylinder 2. A connecting pipe seat 40 is connected to the outlet end of the connecting water pipe 7 at the inner center of the inner rotating cylinder 32. The connecting pipe seat 40 is stably supported by the support frame 41 at the top of the treatment cylinder 2. A central pipe 42 is connected to the bottom of the connecting pipe seat 40 at the center of the packing layer 39. A diversion side plate 43 is provided along the circumference of the side of the central pipe 42. Water spray heads 44 are equidistantly connected to the side of the diversion side plate 43, and the water spray heads 44 face the packing layer 39. Six sets of grids 38 and packing layers 39 are installed. Multiple sets of mounting grids 38 are installed on the inner wall of the inner rotating cylinder 32 at equal angles along the circumference. The mounting grids 38 and the packing layer 39 are arranged at a 60° angle to the horizontal plane inside the inner rotating cylinder 32, converting the impact kinetic energy of the water flow into the tangential driving force of the rotation of the inner rotating cylinder 32. Three sets of diversion side plates 43 are provided so that after the water flow is sprayed out by the spray head 44, it is evenly contacted with multiple packing layers 39, so that multiple packing layers 39 process the water flow simultaneously. An interception net 45 is installed at the bottom of the inner rotating cylinder 32.

[0039] Please see Figure 11 A modular and mobile integrated treatment method for seawater aquaculture wastewater includes the following steps: Step 1, coagulation treatment: During the process of transporting aquaculture wastewater along the spiral tube 10, the coagulant in the collection box 11 flows downwards so that the coagulant and water flow are fully mixed when the water flows through the inside of the spiral tube 10. Step 2, stirring treatment: The water pressure inside the spiral tube 10 drives the rotating blade 30 to rotate. With the help of the air pressure delivered by the guide tube 28, the rotation of the rotating blade 30 is accelerated and stirred with the airflow to achieve the mixing of coagulant and water. Step 3, sedimentation treatment: Use sedimentation tank 5 to accumulate sediment, and discharge the waste through drain pipe 6; Step 4, diversion and delivery: The tailwater is delivered to the central pipe 42 through the connecting water pipe 7 and water pump 8. Based on the diversion side plate 43 and the spray head 44, the water flow is then evenly sprayed onto the packing layer 39 from multiple directions to achieve full contact. Step 5, biofilm treatment: The inner rotating cylinder 32 is driven by a gear drive mechanism to rotate inside the treatment cylinder 2, so that the packing layer 39 rotates synchronously and comes into contact with water for treatment; Step 6, Filtration and Discharge: After water treatment, the wastewater is intercepted by the interception net 45, and the effluent is stored in the accumulation tank 9 and discharged through the outlet pipe 4.

[0040] The working principle and usage process of this invention are as follows: First, the aquaculture wastewater is transported to the spiral tube 10 on the inner wall of the coagulation cylinder 1 through the inlet pipe 3. The collection box 11 and the storage cylinder 25 are filled with coagulant. During the process of the wastewater being transported in the spiral tube 10, the water-receiving plate 19 is deflected under the action of the water flow pressure in the spiral tube 10. The torsion spring 15 restricts the deflection plate 16 from deflecting. Under the action of pressure, the water-receiving plate 19 overcomes the torsion and drives the connecting plate 18 and the deflection plate 16 to deflect, so that the sealing plate 17 is separated from the box wall of the collection box 11, and the coagulant in the collection box 11 flows downward, so that the coagulant and the water flow are fully mixed when the water flows through the inside of the spiral tube 10. When the water pressure is high, the deflection angle of the deflection plate 16 increases accordingly, and the drop gap of the coagulant increases. Based on the water pressure, the dosage of coagulant is controlled. By using the connecting pipe 23 and the main pipe 24, the coagulant accumulated in the accumulation cylinder 25 is automatically replenished into the collection box 11, timely replenishment, and avoidance of interruption in the coagulation process. The guide strip 21 on the inclined surface of the deflection plate 16, combined with the dispersion groove 22, accelerates the fall of the coagulant and ensures that the coagulant falls evenly into the spiral tube 10, improving the uniformity of coagulant and water mixing. With the help of the drainage holes 20 in the water-receiving plate 19, the water carrying the coagulant passes through the drainage holes 20 to further disperse the water flow. Based on the real-time water pressure, the mechanical adaptive adjustment of the coagulant dosage is realized, which can achieve continuous and uniform drug supply without external electrical control intervention and ensure that the coagulant and water are fully mixed during the transportation process. During the flow of tailwater and mixing with coagulant, the rotating blade 30 is rotatably installed inside the spiral tube 10 via the rotating shaft 29, causing the rotating blade 30 to rotate under the pressure of the water flow. At the same time, the air pipe 27 and the manifold 31 are connected to an external air source, and the gas pressure is directed to the rotating blade 30 by the guide pipe 28. With the help of the air pressure delivered by the guide pipe 28, the rotation of the rotating blade 30 is further accelerated. Through the rotation of the rotating blade 30, the water flow carrying coagulant in the spiral tube 10 is fully stirred and mixed, improving the fullness of the mixing between the coagulant and the water flow. The air flow is stirred by the pressure air flow delivered by the guide pipe 28, improving the mixing effect of the coagulant. During the mixing and flow of the effluent carrying coagulant, it is transported to the bottom of the coagulation cylinder 1 through the spiral tube 10 for flocculation and sedimentation. The coagulant destabilizes colloidal particles and tiny suspended solids and forms flocculent precipitates. After hydrolysis, the coagulant generates positively charged hydroxide colloids, which neutralize and adsorb negatively charged particles in the effluent, thereby promoting particle aggregation and sedimentation. The sediment is accumulated in the sedimentation hopper 5, and the sewage pipe 6 facilitates the discharge of waste. After sedimentation, the effluent after preliminary treatment in the coagulation cylinder 1 is transferred and transported through the connecting water pipe 7 and the water pump 8. The effluent is transported to the central pipe 42 through the connecting water pipe 7. The motor 37 is started to drive the drive gear 36 to rotate, which in turn drives the drive gear disk 35 to rotate, so that the inner rotating cylinder 32 rotates in the treatment cylinder 2. With the help of the annular track 33 and the guide block 34, the inner rotating cylinder 32 rotates stably in the treatment cylinder 2, and the packing layer 39 installed in the grid 38 inside the inner rotating cylinder 32 rotates synchronously. After the tailwater is transported into the central pipe 42, the water flow can be evenly sprayed onto the packing layer 39 from multiple directions based on the diversion side plate 43 on the side of the central pipe 42 and the water spray head 44 evenly arranged on the diversion side plate 43. This allows the water flow to fully contact the dynamically rotating packing layer 39, ensuring that multiple packing layers 39 can fully treat the water flow and improve the treatment effect of the packing layer 39. The packing layer 39 utilizes a biofilm fixed on the surface of the carrier to adsorb, decompose, and transform pollutants in the effluent. When the effluent flows through the surface of the carrier, microorganisms grow and reproduce by taking in pollutants, forming a biofilm with a multi-layered structure. This biofilm is responsible for degrading organic matter, decomposing recalcitrant organic matter, and producing biogas as a byproduct. The biofilm method has the advantages of strong resistance to shock loads and low sludge production. Furthermore, by using the water flow to impact the inclined packing layer 39, the water flow pressure is converted into the driving force for the rotation of the packing layer 39 and the inner rotating cylinder 32, thereby achieving auxiliary drive and reducing energy consumption. After treatment, the wastewater is intercepted by the interception net 45 and flows into the accumulation tank 9 at the bottom of the coagulation tank 1 for accumulation. Finally, it is discharged through the outlet pipe 4. By combining the coagulation tank 1 and the treatment tank 2 in a modular design, it is convenient to select and combine them flexibly according to different aquaculture needs and water quality conditions to achieve the best treatment effect. The coagulation tank 1 and the treatment tank 2 are easy to move and can be applied to seawater aquaculture facilities in different locations without having to be fixed in one place for a long time. After the coagulation tank 1 removes colloids and small suspended solids through coagulation, the residual organic matter is degraded by the biofilm method using the packing layer 39 on the inner side of the treatment tank 2. In this way, the effect of seawater aquaculture wastewater treatment is improved through integrated combined treatment, thereby removing harmful substances such as suspended solids, ammonia nitrogen, and nitrite contained in the aquaculture wastewater.

[0041] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular, mobile integrated treatment device for seawater aquaculture wastewater, comprising a coagulation cylinder (1) and a treatment cylinder (2), characterized in that: A treatment cylinder (2) is installed on one side of the coagulation cylinder (1). The coagulation cylinder (1) removes colloids and small suspended solids through coagulation. The treatment cylinder (2) degrades residual organic matter using a biofilm method. An inner rotating cylinder (32) is rotatably connected to the inside of the treatment cylinder (2). A sedimentation hopper (5) is connected to the bottom of the coagulation cylinder (1). The coagulation cylinder (1) and the treatment cylinder (2) are connected by a water pipe (7). The inner side of the coagulation cylinder (1) is fixedly connected to a spiral tube (10). A collection box (11) is provided at intervals along the pitch of one side of the spiral tube (10). A rotating cylinder (13) is embedded and rotatably connected to the inner side of the collection box (11). The rotating cylinder (13) rotates along the wall of the collection box (11) through a movable shaft (14) in the middle of its inner side. A torsion spring (15) is sleeved on the outer side of the movable shaft (14). The torsion spring (15) provides a preload force to resist the water flow pressure. A deflection plate (16) is connected to the side of the rotating cylinder (13) along its inclined direction. A sealing plate (17) is connected to the bottom of the deflection plate (16) along its horizontal direction. A connecting plate (18) is connected to the bottom of the sealing plate (17). A water-receiving plate (19) is connected to the bottom of the connecting plate (18). The water-receiving plate (19) is located inside the spiral tube (10). Drainage holes (20) are evenly opened inside the water-receiving plate (19). The top side of the collection box (11) is connected to a connecting pipe (23), the feed end of the connecting pipe (23) is connected to a main pipe (24), and the top of the main pipe (24) is connected to an accumulation cylinder (25).

2. The modular, mobile integrated treatment device for marine aquaculture wastewater according to claim 1, characterized in that: The top side of the coagulation cylinder (1) is connected to a water inlet pipe (3), the bottom of the sedimentation hopper (5) is connected to a sewage pipe (6), and the water inlet end of the connecting water pipe (7) is equipped with a water pump (8).

3. The modular, mobile integrated treatment device for seawater aquaculture wastewater according to claim 2, characterized in that: The bottom of the treatment cylinder (2) is connected to the storage cylinder (9), and the bottom of one side of the storage cylinder (9) is connected to the water outlet pipe (4). The inner side of the inner rotating cylinder (32) is equipped with an installation grid (38), and the inner side of the installation grid (38) is filled with a filler layer (39). The inside of the installation grid (38) is provided with a filling groove, and the filler layer (39) is tightly placed in the filling groove. Fine holes are evenly provided on both sides of the installation grid (38). The water inlet end of the spiral pipe (10) is connected to the water inlet pipe (3).

4. The modular, mobile integrated treatment device for marine aquaculture wastewater according to claim 1, characterized in that: The deflection plate (16) has guide strips (21) connected at equal intervals on its inclined surface, and the top of the sealing plate (17) is provided with a dispersion groove (22) between two adjacent guide strips (21). The end of the sealing plate (17) is provided with a rounded convex structure, and the end of the sealing plate (17) is in close contact with the box wall of the collection box (11). The top of the collection box (11) is provided with a top cover (12), and the inside of the collection box (11) and the storage cylinder (25) are filled with coagulant. The top of the main pipe (24) is connected with a solenoid valve. The deflection plate (16) is deflected torsionally along the wall of the collection box (11) by means of the rotating cylinder (13), the movable shaft (14) and the torsion spring (15).

5. The modular, mobile integrated treatment device for seawater aquaculture wastewater according to claim 1, characterized in that: A connecting air box (26) is provided at intervals along the pitch on the top of the other side of the spiral tube (10). The connecting air box (26) is arranged opposite to the collection box (11). An air pipe (27) is connected to the top of the connecting air box (26). One end of the air pipe (27) is connected to the manifold (31). The bottom of the connecting air box (26) is connected to a guide tube (28), and the inner side of the spiral tube (10) is rotatably connected to a rotating shaft (29) located directly below the connecting air box (26). Rotating blades (30) are evenly arranged on the outer side of the rotating shaft (29).

6. The modular, mobile integrated treatment device for seawater aquaculture wastewater according to claim 5, characterized in that: The air inlet of the manifold (31) is connected to an external air pump, and the air outlet of the guide pipe (28) is directly opposite the rotating blade (30). The rotating blade (30) rotates inside the spiral tube (10) via the rotating shaft (29).

7. The modular, mobile integrated treatment device for seawater aquaculture wastewater according to claim 1, characterized in that: The top edge of the inner rotating cylinder (32) is provided with a drive gear disk (35), and a drive gear (36) is connected to one side edge of the drive gear disk (35) through gear meshing. The drive gear (36) is connected to the transmission shaft of the motor (37), and the motor (37) is fixedly installed on the top of the processing cylinder (2). The inner rotating cylinder (32) is connected to the outlet end of the connecting water pipe (7) at the middle of its inner side. The connecting pipe seat (40) is stably supported by the support frame (41) at the top of the treatment cylinder (2). The bottom of the connecting pipe seat (40) is connected to the central pipe (42) at the center of the packing layer (39). The side of the central pipe (42) is provided with a diversion side plate (43) along its circumference. The side of the diversion side plate (43) is equidistantly connected with water spray heads (44). The bottom of the inner rotating cylinder (32) is equipped with an interception net (45).

8. The modular, mobile integrated treatment device for seawater aquaculture wastewater according to claim 7, characterized in that: The top and bottom of the processing cylinder (2) are provided with annular tracks (33), and the top and bottom edges of the inner rotating cylinder (32) are provided with guide blocks (34) corresponding to the annular tracks (33). The inner rotating cylinder (32) rotates stably along the inner side of the processing cylinder (2) through the guide blocks (34) and the annular tracks (33).

9. A modular, mobile integrated treatment device for seawater aquaculture wastewater according to claim 7, characterized in that: The installation grid (38) and the packing layer (39) are provided in six sets. Multiple sets of installation grids (38) are installed on the inner wall of the inner rotating cylinder (32) at equal angles along the circumferential direction. The installation grids (38) and the packing layer (39) are arranged in the inner rotating cylinder (32) at a 60° angle with the horizontal plane. The diversion side plate (43) is provided in three sets.

10. A treatment method for a modular, mobile integrated treatment device for marine aquaculture wastewater according to claim 1, characterized in that: Includes the following steps: Step 1, coagulation treatment: During the process of transporting aquaculture wastewater along the spiral tube (10), the coagulant in the collection box (11) flows downward so that the coagulant and water flow are fully mixed when the water flows through the spiral tube (10); Step 2, stirring treatment: The water pressure inside the spiral tube (10) drives the rotating blade (30) to rotate. With the help of the air pressure delivered by the guide tube (28), the rotating blade (30) is accelerated to cooperate with the air flow stirring, so as to achieve the mixing of coagulant and water flow. Step 3, sedimentation treatment: use sedimentation tank (5) to accumulate sediment, and discharge the waste through drain pipe (6); Step 4, diversion and delivery: The tailwater is delivered to the central pipe (42) through the connecting water pipe (7) and water pump (8). Based on the diversion side plate (43) and the spray head (44), the water flow is then evenly sprayed from multiple directions onto the packing layer (39) for full contact. Step 5, biofilm treatment: The inner rotating cylinder (32) is driven by a gear drive mechanism to rotate inside the treatment cylinder (2), so that the packing layer (39) rotates synchronously and comes into contact with water for treatment; Step 6, Filtration and Discharge: After water treatment, the tailwater is intercepted by the interception net (45), and the effluent is stored in the accumulation tank (9) and discharged through the outlet pipe (4).

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