Marine microplastic interception and recovery device and method

Abstract

The present application belongs to the technical field of microplastic treatment, and discloses a marine microplastic interception and recovery device and a recovery method. The recovery cylinder is divided into a first separation chamber, a second separation chamber and a third separation chamber from top to bottom. The first separation assembly includes a first filter screen arranged in the first separation chamber, and a discharge module for discharging the filtered material is rotatably connected in the first filter screen. The second separation assembly includes a plurality of longitudinally rotating separation cylinders, the separation cylinders are drivingly connected with the discharge module, and the bottom end of the separation cylinder is provided with a separation module. The third separation assembly includes a plurality of separation tubes, and the separation cylinder is communicated with the separation tube through the discharge module to discharge the microplastics. The present application has compact structure, high degree of automation, can realize the separation and recovery of the microplastics in seawater in stages, effectively avoids the blockage of the equipment by marine organisms and large-volume garbage, does not need to frequently replace the filter module, can accelerate the separation efficiency, improve the separation effect rate, and reduce the separation cost.

Description

Technical Field

[0001] This invention relates to the field of microplastic treatment technology, and in particular to a marine microplastic interception and recycling device and recycling method. Background Technology

[0002] Microplastics, plastic particles with a diameter of less than 5 millimeters, are a major contributor to pollution. Their abundance in the ocean easily leads to ingestion by marine life, causing mass mortality. Through the food chain and food web, they can further harm other organisms, resulting in secondary marine pollution. Because many microplastics take hundreds of years to fully degrade, the artificial disposal of microplastics is becoming increasingly urgent.

[0003] In existing technologies, filtration is a common method for intercepting and recovering marine microplastics. It involves filtering seawater using filter screens with different pore sizes to separate microplastics. Large-scale filtration devices are often installed in nearshore areas or estuaries, typically equipped with multiple layers of filter screens with varying pore sizes to effectively intercept microplastics of different particle sizes. The advantages of filtration are its relatively simple operation, relatively low cost, and good interception effect on larger microplastics. However, this method also has significant drawbacks. Firstly, the filter screens are easily clogged by microplastics and other marine debris, requiring frequent cleaning and replacement, which not only increases labor and material costs but may also lead to equipment downtime. Secondly, the filtration effect is poor for smaller microplastics, especially nanoscale microplastics, making efficient interception and recovery difficult.

[0004] Therefore, this invention designs a marine microplastic interception and recycling device and recycling method to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a marine microplastic interception and recycling device and recycling method to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a marine microplastic interception and recycling device, comprising:

[0007] The recovery cylinder includes a first separation chamber, a second separation chamber, and a third separation chamber, which are divided from top to bottom.

[0008] A first separation component, the first separation component includes a first filter screen disposed in the first separation chamber, and a discharge module for discharging the filtered material is rotatably connected inside the first filter screen.

[0009] The second separation assembly includes a plurality of separation cylinders rotatably connected longitudinally within the second separation chamber. The top end of each separation cylinder communicates with the first separation chamber, and the separation cylinder is drivenly connected to the discharge module. The bottom end of each separation cylinder is provided with a separation module for discharging microplastics.

[0010] The third separation component includes several separation tubes disposed within the third separation chamber. The separation cylinder is connected to the separation tubes through the discharge module, collecting the separated microplastics and discharging them from the third separation chamber.

[0011] Preferably, the discharge module includes a discharge shaft that is rotatably connected to the first filter screen in the longitudinal direction, and a plurality of curved discharge plates are fixedly connected to the outer circumference of the discharge shaft at equal intervals, the edges of the discharge plates slidingly contacting the inner wall of the first filter screen.

[0012] Preferably, a first isolation plate is provided between the first separation chamber and the second separation chamber, and the top end of the separation cylinder is rotatably connected to the bottom end of the first isolation plate; a transmission module that is drivenly connected to the discharge shaft is provided inside the first isolation plate, and the transmission module is drivenly connected to the separation cylinder.

[0013] Preferably, the transmission module includes a transmission cavity formed in the first isolation plate, a drive wheel is rotatably connected to the middle of the transmission cavity, and a driven wheel is externally engaged with the drive wheel, the driven wheel being sleeved on the top of the separation cylinder.

[0014] Preferably, a cleaning shaft is rotatably connected inside the separation cylinder. The top end of the cleaning shaft is fixedly connected to the first isolation plate. A plurality of cleaning blades are axially spaced at equal intervals on the outer wall of the cleaning shaft. The end of the cleaning blade away from the cleaning shaft slides in contact with the inner wall of the cleaning cylinder. The bottom end of the cleaning blade sends the separated microplastics into the discharge module.

[0015] Preferably, a second isolation plate is provided between the second separation chamber and the third separation chamber, the separation cylinder is rotatably connected to the second isolation plate, and a plurality of water leakage holes are provided through the second isolation plate, through which the seawater separated by the separation cylinder is discharged into the third separation chamber.

[0016] Preferably, the separation module includes a bottom sealing plate fixed to the bottom end of the separation cylinder, the bottom sealing plate being rotatably connected to the second isolation plate; the top end of the bottom sealing plate is provided with an annularly arranged collection groove, the bottom end of the cleaning plate is in sliding contact with the side wall and bottom end of the collection groove, and the cleaning plate sends microplastics into the separation tube through a plurality of discharge holes at the bottom end of the collection groove.

[0017] Preferably, an installation block is provided in the discharge hole, and a separating wheel is rotatably connected inside the installation block. The outer wall of the separating wheel slides in a sealed manner with the inner wall of the installation block, and the top end of the separating wheel extends out of the installation block and contacts the bottom end of the cleaning plate for transmission.

[0018] Preferably, the bottom end of the cleaning plate is provided with an inclined relief groove on the side facing the rotation direction, and the top of the relief groove is higher than the top of the separating wheel.

[0019] This invention also discloses a method for recovering marine microplastics based on a marine microplastic interception and recovery device, comprising the following steps:

[0020] The seawater to be treated is pumped into the first separation chamber, where it is initially filtered by the first separation screen, and the separated impurities are discharged from the first separation chamber through the discharge module.

[0021] After initial filtration, the seawater enters the separation cylinder in the second separation component, while the discharge module drives the separation cylinder to rotate at high speed to achieve centrifugal separation of seawater and microplastics.

[0022] The seawater separated by the separator enters the third separation chamber, and after being collected, it is discharged to a designated location;

[0023] The microplastics separated inside the separation cylinder are separated from the inner wall of the separation cylinder by the separation module and discharged into the separation tube in the third separation chamber. After collection, they are discharged from the third separation chamber for recycling.

[0024] Compared with the prior art, the present invention has the following advantages and technical effects: The present invention discloses a marine microplastic interception and recovery device and recovery method, including a recovery cylinder, a first separation component, a second separation component, and a third separation component. These components cooperate with each other to treat seawater at different stages and in different ways, effectively separating and collecting microplastics, thus achieving the interception and recovery of marine microplastics. The recovery cylinder is divided into a first separation chamber, a second separation chamber, and a third separation chamber, providing independent spaces for different separation operations, allowing the entire microplastic interception and recovery process to proceed in an orderly manner. Each separation chamber can be equipped with different separation components according to the characteristics of the microplastics and separation requirements, achieving progressively finer separation and improving recovery efficiency and purity. The first filter screen of the first separation component is located in the first separation chamber, which can initially intercept larger impurities and organisms in the seawater, playing a coarse filtration role, reducing the burden on subsequent separation components, and improving the overall processing efficiency of the recovery device. The discharge module is rotatably connected to the first filter screen, which can promptly discharge the material filtered by the first filter screen, avoiding the discharge of impurities and microplastics. Plastic accumulates in the first separation chamber, affecting the filtration effect. Ensuring the continuous and stable operation of the first separation component is crucial. A longitudinally rotating separation cylinder is connected to the second separation chamber, with its top end communicating with the first separation chamber. This further separates the seawater after treatment by the first separation component. The rotating cylinder increases the contact area and time between the seawater and the inner wall of the cylinder, while centrifugal force enhances the separation effect, more effectively separating microplastics. The separation cylinder is driven by a discharge module, allowing for the smooth discharge of the separated microplastics. This drive connection design ensures the rotation of the separation cylinder and the operation of the discharge module work in tandem, guaranteeing the continuity and automation of the entire separation process. A separation module located at the bottom of the separation cylinder precisely separates and discharges the microplastics, achieving initial collection and laying the foundation for further processing and collection. A separation tube located in the third separation chamber, connected to the separation cylinder, collects the microplastics discharged from the separation cylinder, further separating and concentrating them for subsequent unified collection and processing.

[0025] This invention features a compact structure and a high degree of automation, enabling the separation and recycling of microplastics in seawater in stages. It effectively prevents marine organisms and large-volume debris from clogging the equipment, eliminates the need for frequent filter module replacements, accelerates separation efficiency, improves separation effectiveness, and reduces separation costs. Attached Figure Description

[0026] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0027] Figure 1 This is an axial view of the marine microplastic interception and recovery device of the present invention;

[0028] Figure 2 This is a top view of the second separation cavity structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 A magnified view of part A in the image;

[0030] Figure 4 This is a top view of the transmission module of the present invention;

[0031] Figure 5 This is a schematic diagram of the discharge module of the present invention;

[0032] Figure 6 This is a schematic diagram of the separation cylinder structure of the present invention;

[0033] Figure 7 For the present invention Figure 6 A magnified view of part B in the image;

[0034] Figure 8 This is a side view of the separation wheel structure of the present invention;

[0035] In the diagram: 1. Recycling cylinder; 2. First separation chamber; 3. Second separation chamber; 4. Third separation chamber; 5. First filter screen; 6. Separation cylinder; 7. Separation pipe; 8. Discharge shaft; 9. Discharge plate; 10. Discharge motor; 11. Water inlet pipe; 12. First isolation plate; 13. Separation cover plate; 14. Liquid inlet hole; 15. Transmission chamber; 16. Drive wheel; 17. Driven wheel; 18. Cleaning shaft; 19. Cleaning plate; 20. Second isolation plate; 21. Drain hole; 22. 23. Bottom sealing plate; 24. Collection groove; 25. Discharge hole; 26. Mounting block; 27. Separating wheel; 28. Leaving groove; 29. ​​Rotating shaft; 20. Blade; 31. Water outlet pipe; 32. Discharge pipe; 33. Inner separation plate; 34. Outer separation plate; 35. Support spring plate; 36. Separation hole; 37. Second filter screen; 38. Elastic block; 39. Guide groove; 40. Guide rod; 41. Return spring; 42. Support foot; 43. Support frame; 44. Telescopic rod. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1-8 As shown, this embodiment provides a marine microplastic interception and recycling device, comprising:

[0039] The recycling cylinder 1 includes a first separation chamber 2, a second separation chamber 3, and a third separation chamber 4, which are divided from top to bottom.

[0040] The first separation component includes a first filter screen 5 disposed in the first separation chamber 2, and a discharge module for discharging the filtered material is rotatably connected inside the first filter screen 5.

[0041] The second separation assembly includes several separation cylinders 6 that are rotatably connected in the second separation chamber 3. The top end of the separation cylinder 6 is connected to the first separation chamber 2. The separation cylinder 6 is connected to the discharge module. The bottom end of the separation cylinder 6 is provided with a separation module for discharging microplastics.

[0042] The third separation component includes several separation tubes 7 disposed within the third separation chamber 4. The separation cylinder 6 is connected to the separation tubes 7 via a discharge module, which collects the separated microplastics and discharges them from the third separation chamber 4.

[0043] This invention discloses a marine microplastic interception and recovery device and method, including a recovery cylinder 1, a first separation component, a second separation component, and a third separation component. These components cooperate to treat seawater at different stages and in different ways, effectively separating and collecting microplastics, thus achieving the interception and recovery of marine microplastics. The recovery cylinder 1 is divided into a first separation chamber 2, a second separation chamber 3, and a third separation chamber 4, providing independent spaces for different separation operations, allowing the entire microplastic interception and recovery process to proceed in an orderly manner. Each separation chamber can be equipped with different separation components according to the characteristics of the microplastics and separation requirements, achieving progressively finer separation and improving recovery efficiency and purity. The first filter screen 5 of the first separation component is located in the first separation chamber 2, which can initially intercept larger impurities and organisms in the seawater, acting as a coarse filter, reducing the burden on subsequent separation components, and improving the overall processing efficiency of the recovery device. The discharge module is rotatably connected to the first filter screen 5, allowing for timely discharge of the filtered material, preventing the accumulation of impurities and microplastics in the first separation chamber 2, which would affect... The filtration effect ensures the continuous and stable operation of the first separation component. The separation cylinder 6 is longitudinally rotatably connected to the second separation chamber 3 and its top end is connected to the first separation chamber 2, further separating the seawater after it has been treated by the first separation component. The rotating separation cylinder 6 increases the contact area and time between the seawater and the inner wall of the separation cylinder 6, and at the same time, the centrifugal force improves the separation effect, more effectively separating microplastics. The separation cylinder 6 is drivenly connected to the discharge module, which can smoothly discharge the microplastics separated in the separation cylinder 6. At the same time, the design of the drive connection makes the rotation of the separation cylinder 6 and the operation of the discharge module work together to ensure the continuity and automation of the entire separation process. The separation module is located at the bottom of the separation cylinder 6, which can accurately separate the microplastics from the separation cylinder 6 and discharge them from the separation cylinder 6, realizing the initial collection of microplastics and laying the foundation for further processing and collection. The separation tube 7 is located in the third separation chamber 4. Through communication with the separation cylinder 6, it can collect the microplastics discharged from the separation cylinder 6, and further separate and concentrate the microplastics, which is convenient for the unified collection and processing of microplastics in the future. This invention features a compact structure and a high degree of automation, enabling the separation and recycling of microplastics in seawater in stages. It effectively prevents marine organisms and large-volume debris from clogging the equipment, eliminates the need for frequent filter module replacements, accelerates separation efficiency, improves separation effect, and reduces separation costs.

[0044] In one embodiment of the present invention, a plurality of support feet 41 are provided at the bottom end of the recycling cylinder 1 for fixing the recycling cylinder 1, thereby improving the stability of the equipment.

[0045] In one embodiment of the present invention, a water inlet pipe 11 is provided at the top of the recovery cylinder 1 to facilitate the delivery of seawater to be treated into the first separation chamber 2 to begin separation.

[0046] In one embodiment of the present invention, a water outlet pipe 30 is provided on the lower side wall of the third separation chamber 4 to discharge and recycle the filtered seawater.

[0047] In one embodiment of the present invention, the bottom end of the third separation chamber 4 is provided with a discharge pipe 31 for discharging microplastics, and the microplastics are discharged from the discharge pipe 31 after the separation pipe 7 is collected.

[0048] In one embodiment of the present invention, the side wall of the separation cylinder 6 includes an inner separation plate 32 and an outer separation plate 33 arranged coaxially. A support spring plate 34 is provided between the inner separation plate 32 and the outer separation plate 33 to provide support. Seawater containing microplastics is discharged after being filtered by the inner separation plate 32, thereby achieving the separation of seawater and microplastics.

[0049] In one embodiment of the invention, the inner separation plate 32 and the outer separation plate 33 are respectively provided with a plurality of separation holes 35, and a second filter screen 36 is slidably embedded in the separation holes 35 of the inner separation plate 32 for filtering seawater and realizing the separation of microplastics.

[0050] In one embodiment of the present invention, an elastic block 37 is provided between the inner separation plate 32 and the outer separation plate 33. The elastic block 37 realizes the elastic extension and contraction of the second filter screen 36 through the slidingly provided guide groove 38, guide rod 39 and reset spring 40. When the cleaning plate 19 scrapes over the second filter screen 36, it pushes the second filter screen 36 towards the outer separation plate 33. After the cleaning plate 19 passes, it is pushed back by the reset spring 40, thereby causing the second filter screen 36 to vibrate and increase the cleaning effect on microplastics.

[0051] In one embodiment of the present invention, a support frame 42 is provided inside the elastic block 37, and a telescopic rod 43 that can automatically rebound is provided between the support frame 42 and the second filter screen 36. Combined with the reset spring 40, the rebound force of the second filter screen 36 is increased, thereby increasing the vibration effect.

[0052] This invention is mainly used for the physical filtration of microplastics, while existing seawater microplastic treatment technologies also include the following methods:

[0053] Adsorption method: This method utilizes materials with adsorption properties, such as activated carbon and certain polymers, to adsorb microplastics from seawater. These adsorbent materials have a large specific surface area and special surface functional groups, enabling them to undergo physical or chemical adsorption with microplastics, thereby removing them from seawater. The adsorption method is highly efficient at removing microplastics, especially for tiny particles that are difficult to remove through filtration. However, this method also has limitations. The adsorption capacity of the adsorbent material is limited, and it needs to be regenerated or replaced after adsorption saturation. The regeneration process is usually complex and costly. Furthermore, some adsorbent materials may cause secondary pollution to the marine environment; for example, while adsorbing microplastics, they may release harmful substances into the seawater.

[0054] Flotation: Based on the density difference between microplastics and seawater, flotation involves adding a flotation agent to seawater, causing microplastics to adhere to air bubbles and float to the surface for collection. In some experiments and practical applications, flotation has proven effective in recovering microplastics, especially in treating large-scale microplastic pollution, where it can improve recovery efficiency to some extent. However, flotation also faces several challenges. The use of flotation agents may negatively impact marine ecosystems, altering the chemical properties of seawater and affecting the survival and reproduction of marine life. Furthermore, this method has limited selectivity for microplastics, potentially collecting other unwanted substances simultaneously, increasing the difficulty of subsequent processing.

[0055] Biological methods: These methods utilize the uptake and accumulation of microplastics by certain marine organisms to achieve microplastic recycling. Some shellfish and plankton can ingest microplastics from seawater. By collecting and processing these organisms, the amount of microplastics in the ocean can be reduced to some extent. Biological methods are relatively environmentally friendly, as they do not introduce additional chemicals. However, this method is less efficient, the rate of microplastic uptake by organisms is slow, and it is difficult to apply on a large scale. In addition, while ingesting microplastics, the organisms themselves may also be harmed by the microplastics, affecting their growth and survival, and the process of separating microplastics from the organisms is also relatively complex.

[0056] Further optimizing the design, the discharge module includes a discharge shaft 8 longitudinally rotatably connected to the first filter screen 5. Several curved discharge plates 9 are fixedly connected at equal intervals along the outer circumference of the discharge shaft 8, and the edges of the discharge plates 9 slide in contact with the inner wall of the first filter screen 5. The discharge shaft 8 of the discharge module is located within the first filter screen 5, and several arc-shaped discharge plates 9 are fixedly connected to its outer wall. During operation, the discharge motor 10, located at the top of the recovery cylinder 1, drives the equally spaced curved discharge plates 9 to rotate via the discharge shaft 8. The edges of the discharge plates 9 slide against the inner wall of the first filter screen 5, which more effectively scrapes off the filtered material from the first filter screen 5 to prevent clogging and ensure the filtration efficiency of the first separation component. Simultaneously, the arc-shaped design of the discharge plates 9 forms a spiral conveyor between the first filter screen 5 and the separation plates, discharging the separated marine organisms and large impurities.

[0057] In one embodiment of the present invention, the first separation chamber 2 is connected to the outside through the discharge port to discharge the collected marine organisms and large-volume impurities.

[0058] In a further optimized design, a first isolation plate 12 is installed between the first separation chamber 2 and the second separation chamber 3. The top end of the separation cylinder 6 is rotatably connected to the bottom end of the first isolation plate 12. A transmission module, which is driven by the discharge shaft 8, is installed inside the first isolation plate 12. The transmission module is driven by the separation cylinder 6. The first isolation plate 12 separates the first separation chamber 2 and the second separation chamber 3, while providing rotational support for the separation cylinder 6. The transmission module inside the first isolation plate 12 enables the transmission connection between the discharge shaft 8 and the separation cylinder 6, allowing the rotation of the discharge module to drive the rotation of the separation cylinder 6, thus achieving coordinated work between different components and improving the overall operating efficiency of the device.

[0059] Further optimizing the design, the transmission module includes a transmission cavity 15 located within the first isolation plate 12. A drive wheel 16 is rotatably connected to the center of the transmission cavity 15, and a driven wheel 17 is externally meshed with the drive wheel 16. The driven wheel 17 is sleeved on the top of the separation cylinder 6. The transmission cavity 15 provides installation space for the transmission components. The discharge shaft 8 extends into the transmission cavity 15 and drives the drive wheel 16 to rotate. The external meshing of the drive wheel 16 and the driven wheel 17 transmits the power of the discharge shaft 8 to the separation cylinder 6, enabling multiple separation cylinders 6 to rotate at high speed simultaneously, achieving centrifugal separation of seawater and microplastics, and ensuring the high efficiency and stability of the separation process.

[0060] In a further optimized design, a cleaning shaft 18 is rotatably connected inside the separation cylinder 6. The top end of the cleaning shaft 18 is fixedly connected to the first isolation plate 12. A plurality of cleaning plates 19 are axially and evenly spaced on the outer wall of the cleaning shaft 18. The end of each cleaning plate 19 away from the cleaning shaft 18 slides in contact with the inner wall of the cleaning cylinder, while the bottom end of the cleaning plate 19 delivers the separated microplastics into the discharge module. The top end of the cleaning shaft 18 is fixed to the first isolation plate 12, thus keeping the cleaning shaft 18 and the cleaning plates 19 in a fixed position. When the separation cylinder 6 rotates, the cleaning shaft 18 and the separation cylinder 6 rotate relative to each other. The cleaning plates 19, axially and evenly spaced on the outer wall of the cleaning shaft 18, slide along the inner wall of the separation cylinder 6, promptly cleaning the separated microplastics adhering to the inner wall of the separation cylinder 6 and delivering them to the discharge module for discharge. This prevents the accumulation of microplastics on the inner wall of the separation cylinder 6, ensuring the separation effect and continuous working capacity of the separation cylinder 6.

[0061] In a further optimized design, a second isolation plate 20 is installed between the second separation chamber 3 and the third separation chamber 4. The separation cylinder 6 is rotatably connected to the second isolation plate 20. Several drainage holes 21 are drilled through the second isolation plate 20, through which the seawater separated by the separation cylinder 6 is discharged into the third separation chamber 4. The second isolation plate 20 separates the second separation chamber 3 and the third separation chamber 4 and supports the rotation of the separation cylinder 6; the drainage holes 21 allow the seawater separated by the separation cylinder 6 to be smoothly discharged into the third separation chamber 4, achieving further separation of seawater and microplastics, facilitating subsequent seawater discharge and microplastic recycling.

[0062] The scheme is further optimized. The separation module includes a bottom sealing plate 22 fixed to the bottom end of the separation cylinder 6, which is rotatably connected to the second isolation plate 20. The top of the bottom sealing plate 22 has an annularly arranged collection groove 23. The bottom end of the cleaning plate 19 slides in contact with the side wall and bottom end of the collection groove 23. The cleaning plate 19 sends microplastics into the separation tube 7 through several discharge holes 24 at the bottom end of the collection groove 23. The bottom sealing plate 22 of the separation module seals the bottom end of the separation cylinder 6 and rotates on the second isolation plate 20, realizing the rotational installation of the separation cylinder 6. The cross-section of the collection groove 23 is designed as an inverted trapezoid to collect the microplastics cleaned by the cleaning plate 19. At the same time, the bottom end of the cleaning plate 19 is adapted to the cross-section of the collection groove 23. The microplastics are sent into the discharge holes 24 by the pushing of the cleaning plate, and the discharge holes 24 send the microplastics into the separation tube 7, realizing the precise delivery of microplastics from the separation cylinder 6 to the separation tube 7 and ensuring the continuity of microplastic recycling.

[0063] In a further optimized design, a mounting block 25 is installed in the discharge hole 24. A separating wheel 26 is rotatably connected inside the mounting block 25. The outer wall of the separating wheel 26 slides in a sealed manner with the inner wall of the mounting block 25. The top end of the separating wheel 26 extends out of the mounting block 25 and contacts the bottom end of the cleaning plate 19 for transmission. The mounting block 25 is installed in the discharge hole 24 to provide mounting and rotational support for the separating wheel 26. The separating wheel 26 slides in a sealed manner with the inner wall of the mounting block 25, and its top end extends out of the mounting block 25 to contact the bottom end of the cleaning plate 19 for transmission. When the microplastics pass through the top end of the discharge hole 24, they fall into the gap between the mounting block 25 and the separating wheel 26. Then, the cleaning plate pushes the separating wheel 26, causing the microplastics that have fallen into the mounting block 25 to fall into the separation tube 7 below, thereby recycling the collected microplastics.

[0064] To further optimize the design, a recessed groove 27 is provided at the bottom of the cleaning plate 19 on the side facing the direction of rotation, with the top of the recessed groove 27 higher than the top of the separating wheel 26. The recessed groove 27 is located at the bottom of the cleaning plate 19, and its inclined arrangement with its top higher than the top of the separating wheel 26 allows it to push the microplastics during the rotation of the cleaning plate 19, thereby driving the separating wheel 26 to rotate. This ensures the normal operation of the cleaning plate 19 in pushing the microplastics into the separating wheel 26, and facilitates the smooth passage of the microplastics through the discharge hole 24 into the separating tube 7.

[0065] In one embodiment of the present invention, the separating wheel 26 includes a rotating shaft 28 rotatably connected within the mounting block 25. A plurality of blades 29 are fixedly connected at equal intervals to the outer wall of the rotating shaft 28. The outer edge of the blades 29 slides in contact with the inner cavity of the mounting block 25 to achieve separation of microplastics.

[0066] This invention also discloses a method for recovering marine microplastics based on a marine microplastic interception and recovery device, comprising the following steps:

[0067] Seawater to be treated is pumped into the first separation chamber 2, where it undergoes preliminary filtration through the first separation screen. The separated impurities are discharged from the first separation chamber 2 via the discharge module. First, check that the support feet 41 at the bottom of the recovery cylinder 1 are stable to ensure the equipment is placed stably. Then, connect the inlet pipe 11 to the seawater extraction equipment to prepare for seawater extraction. Simultaneously, check that the outlet pipe 30 on the lower side wall of the third separation chamber 4 and the discharge pipe 31 at the bottom are unobstructed to facilitate the subsequent discharge of filtered seawater and collection of microplastics. Start the seawater extraction equipment and pump the seawater to be treated through… The water is pumped into the first separation chamber 2 of the recovery cylinder 1 through the inlet pipe 11; the first filter screen 5 in the first separation chamber 2 begins to perform preliminary filtration of the seawater, intercepting larger impurities and organisms in the seawater; at this time, the discharge motor 10 set at the top of the recovery cylinder 1 starts, driving the discharge shaft 8 to rotate, and the curved discharge plates 9 fixed at equal intervals on the outer circumference of the discharge shaft 8 rotate accordingly. The edge of the discharge plate 9 slides against the inner wall of the first filter screen 5, scraping off the filtered impurities and discharging them to the outside through the discharge port of the first separation chamber 2, preventing impurities from accumulating in the first separation chamber 2 and affecting the filtration effect;

[0068] After preliminary filtration, the seawater enters the separation cylinder 6 within the second separation assembly. Simultaneously, the discharge module drives the separation cylinder 6 to rotate at high speed, achieving centrifugal separation of seawater and microplastics. The pre-filtered seawater passes through the channel between the first separation chamber 2 and the second separation chamber 3, entering the separation cylinder 6 within the second separation chamber 3. Due to the action of the transmission module within the first isolation plate 12, the rotation of the discharge shaft 8 drives the separation cylinder 6 to rotate at high speed via the drive wheel 16 and the driven wheel 17. The sidewall of the separation cylinder 6 includes an inner separation plate 32 and an outer separation plate 33. Seawater containing microplastics is discharged after being filtered by the inner separation plate 32. The second filter screen 36 on the inner and outer separation plates 32 further filters the seawater, achieving separation of seawater and microplastics. During the rotation of the separation cylinder 6, the cleaning shaft 18 remains fixed, and the cleaning plate 19 on its outer wall slides along the inner wall of the separation cylinder 6, cleaning off the microplastics adhering to the inner wall of the separation cylinder 6.

[0069] The seawater separated by the separator 6 enters the third separator 4, is collected, and discharged to a designated location. The microplastics separated in the separator 6 are separated from the inner wall of the separator 6 by the separation module and discharged into the separation pipe 7 in the third separator 4. After collection, they are discharged from the third separator 4 for recycling. The seawater separated by the separator 6 is discharged into the third separator 4 through the water leakage hole 21 on the second isolation plate 20. After collection, it is discharged to a designated location through the outlet pipe 30. The microplastics cleaned off by the cleaning plate 19 in the separator 6 are sent into the collection groove 23 at the top of the bottom sealing plate 22 at the bottom of the separator 6. The clearance groove 27 at the bottom of the cleaning plate 19 pushes the microplastics, causing them to fall into the gap between the mounting block 25 and the separation wheel 26 in the discharge hole 24. As the cleaning plate 19 rotates, it pushes the separation wheel 26 to rotate, and the microplastics fall into the separation pipe 7 below through the discharge hole 24. The separation pipe 7 collects the microplastics discharged from each separator 6. Finally, the microplastics are discharged through the discharge pipe 31 at the bottom of the third separator 4 for unified collection and processing.

[0070] After the equipment has been running for a period of time, check whether the first filter screen 5 is damaged and replace it in time if necessary; check whether the rotation of the separator 6 is smooth and whether the cleaning shaft 18 and the cleaning plate 19 are working properly; check whether each transmission component, such as the drive wheel 16, the driven wheel 17, the discharge shaft 8, etc., is worn, and repair or replace it in time if there is a problem.

[0071] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0072] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A marine microplastic interception and recovery device, characterized in that, The application relates to a recycling cylinder (1) comprising a first separation cavity (2), a second separation cavity (3) and a third separation cavity (4) separated from top to bottom; a first separation assembly comprising a first filter screen (5) arranged in the first separation cavity (2), wherein a discharging module for discharging filtered materials is rotationally connected in the first filter screen (5); a second separation assembly comprising a plurality of separation cylinders (6) rotationally connected longitudinally in the second separation cavity (3), wherein the top end of the separation cylinder (6) is communicated with the first separation cavity (2), the separation cylinder (6) is drivingly connected with the discharging module, and the bottom end of the separation cylinder (6) is provided with a separation module for discharging micro plastics; a third separation assembly comprising a plurality of separation pipes (7) arranged in the third separation cavity (4), wherein the separation cylinder (6) is communicated with the separation pipe (7) through the discharging module, the separated micro plastics are collected and discharged from the third separation cavity (4); the discharging module comprises a discharging shaft (8) rotationally connected longitudinally in the first filter screen (5), a plurality of curve-shaped discharging sheets (9) are fixedly connected at equal intervals on the outer periphery of the discharging shaft (8), and the edges of the discharging sheets (9) are in sliding contact with the inner wall of the first filter screen (5); a first isolation plate (12) is arranged between the first separation cavity (2) and the second separation cavity (3), the top end of the separation cylinder (6) is rotationally connected to the bottom end of the first isolation plate (12), a transmission module drivingly connected with the discharging shaft (8) is arranged in the first isolation plate (12), and the transmission module is drivingly connected with the separation cylinder (6); a cleaning shaft (18) is rotationally connected in the separation cylinder (6), the top end of the cleaning shaft (18) is fixedly connected with the first isolation plate (12), a plurality of cleaning sheets (19) are arranged at equal intervals on the outer wall of the cleaning shaft (18) in the axial direction, one end of the cleaning sheet (19) away from the cleaning shaft (18) is in sliding contact with the inner wall of the separation cylinder, and the bottom end of the cleaning sheet (19) sends the separated micro plastics into the discharging module; a second isolation plate (20) is arranged between the second separation cavity (3) and the third separation cavity (4), the separation cylinder (6) is rotationally connected on the second isolation plate (20), a plurality of water leakage holes (21) are formed through the second isolation plate (20), and the seawater separated by the separation cylinder (6) is discharged into the third separation cavity (4) through the water leakage holes (21). The transmission module comprises a transmission cavity (15) formed in the first isolation plate (12), a driving wheel (16) is rotationally connected to the middle part of the transmission cavity (15), a plurality of driven wheels (17) are drivingly engaged with the outer periphery of the driving wheel (16), and the driven wheels (17) are sleeved on the top end of the separation cylinder (6). ​ ​ ​ ​ ​ ​ ​ 2. The marine microplastics interception and recovery device according to claim 1, characterized in that: ​ 3. The marine microplastics interception and recovery device of claim 1, wherein: The separation module comprises a bottom sealing plate (22) fixed at the bottom end of the separation cylinder (6), and the bottom sealing plate (22) is rotationally connected to the second isolation plate (20); the top end of the bottom sealing plate (22) is provided with a ring-shaped collection groove (23), the bottom end of the cleaning sheet (19) is in sliding contact with the side wall and the bottom end of the collection groove (23), and the cleaning sheet (19) sends the microplastics into the separation pipe (7) through a plurality of discharge holes (24) at the bottom end of the collection groove (23).

4. The marine microplastic interception and recovery device of claim 3, wherein: The discharge hole (24) is provided with a mounting block (25), the mounting block (25) is rotationally connected with a separation wheel (26), the outer wall of the separation wheel (26) is in sealing sliding contact with the inner wall of the mounting block (25), and the top end of the separation wheel (26) extends out of the mounting block (25) and is in contact transmission with the bottom end of the cleaning sheet (19).

5. The marine microplastic interception and recovery device of claim 4, wherein: The bottom end of the cleaning sheet (19) is provided with an inclined arrangement of a giving-up groove (27) on one side in the rotation direction, and the top end of the giving-up groove (27) is higher than the top end of the separation wheel (26).

6. A method for recovering marine microplastics, based on the marine microplastics interception and recovery device according to any one of claims 1-5, characterized in that The method comprises the following steps: The seawater to be treated is pumped into the first separation cavity (2), the seawater is preliminarily filtered through the first separation net, and the separated sundries are discharged from the first separation cavity (2) through the discharge module; The preliminarily filtered seawater enters the separation cylinder (6) in the second separation assembly, and the discharge module drives the separation cylinder (6) to rotate at high speed to realize centrifugal separation of the seawater and the microplastics; The seawater separated by the separation cylinder (6) enters the third separation cavity (4) and is discharged to a designated position after being collected; The microplastics separated in the separation cylinder (6) are separated from the inner wall of the separation cylinder (6) by the separation module and then discharged into the separation pipe (7) in the third separation cavity (4), and are collected and discharged from the third separation cavity (4) for recycling.

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