A device for collecting microplastics from rural domestic sewage

Abstract

The present invention discloses a microplastic collection device for rural domestic sewage, which belongs to the field of microplastic collection, and comprises a treatment tank, wherein the inner surface of the treatment tank is fixedly connected with a guide plate, the outer surface of the upper end of the treatment tank is fixedly connected with a feeding pipe, the lower end of the feeding pipe penetrates into the inner side of the treatment tank, and a feeding assembly is arranged outside the feeding pipe, wherein the feeding assembly comprises a rotating sleeve rotatably connected with the outer surface of the feeding pipe, the outer surface of the rotating sleeve is fixedly connected with a paddle, and the inner surface of the rotating sleeve is fixedly connected with a fixed frame. By setting a collection assembly, microplastics in sewage can be effectively adsorbed and collected through the porous structure of nano magnetic powder, and nano magnetic powder can have a good adsorption effect on microplastics of different shapes and sheets, and at the same time, nano magnetic powder is used in combination with a magnetic roller to effectively adsorb and collect microplastics in sewage, thereby effectively improving the quality of microplastic collection.

Description

Technical Field

[0001] The present invention relates to the field of microplastic collection, and more specifically, to a microplastic collection device for rural domestic sewage. Background Art

[0002] Microplastic pollution in rural sewage is an environmental issue that is receiving increasing attention. Agricultural plastic films, organic fertilizers and sewage sludge are the main sources of microplastics in farmland soil. Microplastics are difficult to degrade in the environment and will cause long-term pollution to soil and water bodies. They will also change the physical properties of the soil, affect the fertility and structure of the soil, and thus affect the growth of crops.

[0003] Therefore, it is necessary to strengthen the construction and management of rural sewage treatment facilities to improve the efficiency of sewage treatment and reduce the amount of microplastics discharged into natural water bodies with effluent. For example, a Chinese patent with announcement number CN118320498B discloses a microplastic recovery and treatment device, which effectively scrapes away the debris excluded from the outer side of the filter plate by preliminary filtration by setting a material removal mechanism, thereby avoiding clogging of the filter plate and reducing its filtration effect; by setting a conveying mechanism and a diversion mechanism, when particles of different diameters are separated, large particles can be effectively guided to a specific location, thereby facilitating the secondary transportation of the generated debris;

[0004] The microplastic collection device in the prior art absorbs and collects microplastics in sewage by setting up a filter plate. However, in actual operation, due to the great differences in the size and shape of microplastics in sewage, the filter plate is limited by its surface pore size and can only absorb and collect microplastics of corresponding particle size. Microplastics smaller than the mesh diameter will pass through the filter plate and continue to remain in the sewage, making it difficult to completely remove the microplastics, thereby affecting the collection quality of microplastics in sewage. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a device for collecting microplastics in rural domestic sewage, which can achieve effective adsorption and collection of microplastics in sewage by setting a collection component through the porous structure of nano-magnetic powder, and the nano-magnetic powder can have a good adsorption effect on microplastics of different shapes and sheets. At the same time, the nano-magnetic powder is used in combination with a magnetic roller to effectively adsorb and collect microplastics in sewage, thereby effectively improving the quality of microplastic collection.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A device for collecting microplastics in rural domestic sewage, comprising a treatment tank, a guide plate fixedly connected to the inner surface of the treatment tank, a feeding pipe fixedly connected to the outer surface of the upper end of the treatment tank, the lower end of the feeding pipe penetrates the inner side of the treatment tank, and a feeding assembly is arranged on the outer side of the feeding pipe;

[0008] The feeding assembly includes a rotating sleeve rotatably connected to the outer surface of the feeding tube, the outer surface of the rotating sleeve is fixedly connected with a paddle, the inner surface of the rotating sleeve is fixedly connected with a fixed frame, the outer surface of the fixed frame is spirally connected with a reciprocating screw, the upper end of the reciprocating screw is fixedly connected with a sliding rod, the upper end of the sliding rod is fixedly connected with a top plate, the top plate is in sliding contact with the inner surface of the feeding tube, the outer surface of the feeding tube is provided with a feeding trough, the inner surface of the feeding tube is fixedly connected with a sealing plate, the outer surface of the sliding rod is provided with a guide groove, and the sliding rod is slidably connected to the sealing plate through the guide groove.

[0009] Furthermore, the number of the feeding troughs is several groups and distributed in a ring array, the guide plate is spiral, the upper end of the feeding pipe is fixedly connected with a retaining ring, the outer surface of the top plate is conical, the number of the paddles is several groups and distributed in a ring array, the lower end of the processing tank is fixedly connected with a collecting hopper, the lower end of the collecting hopper is fixedly connected with a drain pipe, and the outer surface of the lower end of the processing tank is fixedly connected with a support leg.

[0010] Furthermore, the guide plate is fixedly connected to the feeding pipe on the side away from the treatment tank, and a collecting assembly is provided on the outer surface of the guide plate. The collecting assembly includes a collecting box fixedly connected to the outer surface of the lower end of the guide plate, and the upper end of the collecting box is open. A sewage pipe is fixedly connected to the outer surface of the treatment tank, and the sewage pipe is connected to the interior of the collecting box. A gate valve is fixedly connected to the inner surface of the sewage pipe.

[0011] Furthermore, a core shaft is fixedly connected to the inner surface of the collecting box, a magnetic roller is fixedly connected to the outer surface of the core shaft, a scraper is fixedly connected to the inner surface of the collecting box, the scraper is in rotational contact with the outer surface of the magnetic roller, a baffle is fixedly connected to the inner surface of the collecting box, and a block is fixedly connected to the outer surface of the upper end of the guide plate, and the blocks are distributed in a parallel array.

[0012] Furthermore, a water inlet pipe is fixedly connected to the outer surface of the upper end of the treatment tank, a feed hopper is fixedly connected to the upper end of the water inlet pipe, an adjusting component is arranged on the inner side of the water inlet pipe, the adjusting component includes a partition fixedly connected to the inner surface of the water inlet pipe, an adjusting cylinder is slidably connected to the outer surface of the partition, the lower end of the adjusting cylinder is open, and the water inlet pipe is located on the upper side of the guide plate.

[0013] Furthermore, a water inlet groove is provided on the outer surface of the regulating cylinder, and the number of the water inlet grooves is several groups and distributed in a ring array. A floating plate is fixedly connected to the outer surface of the lower end of the regulating cylinder, and the floating plate is in a circular ring shape. The floating plate is in sliding contact with the inner surface of the water inlet pipe.

[0014] Furthermore, a filter assembly is provided inside the treatment tank, and the filter assembly includes a filter screen fixedly connected to the lower side of the inner surface of the treatment tank, the filter screen is conical and located at the lower side of the guide plate, the upper end of the filter screen is fixedly connected to a base, the base is annular, and the outer surface of the base is rotatably connected to the rotating sleeve.

[0015] Furthermore, the outer surface of the upper end of the base is in rotational contact with the fixed frame, and the cleaning plate fixedly connected to the lower end of the rotating sleeve is in two groups and symmetrically distributed, and the outer surface of the lower end of the cleaning plate is in rotational contact with the upper end of the filter.

[0016] Furthermore, a filter assembly 2 is provided on the upper side of the guide plate, and the filter assembly 2 includes a filter net 2 fixedly connected to the outer surface of the upper end of the guide plate, and a connecting plate is fixedly connected to the rear side of the outer surface of the filter net 2. The connecting plates are in two groups and are distributed in parallel. A movable groove is provided on the outer surface of the connecting plate, and a movable rod is slidably connected to the inner side of the movable groove.

[0017] Furthermore, a movable plate is fixedly connected to the outer surface of the movable rod, and the movable plate is in sliding contact with the second outer surface of the filter screen. A mounting block is fixedly connected to the outer surface of the movable rod, and the mounting block is fixedly connected to a buoyancy box at one end away from the movable rod, and a cavity is embedded inside the buoyancy box.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) This scheme sets up a collection component, and uses the porous structure of nano-magnetic powder to effectively adsorb and collect microplastics in sewage. Nano-magnetic powder can have a good adsorption effect on microplastics of different shapes and flakes. At the same time, nano-magnetic powder is used in conjunction with a magnetic roller to effectively adsorb and collect microplastics in sewage, thereby effectively improving the quality of microplastic collection.

[0020] (2) This scheme sets up a feeding component to match the amount of nano-magnetic powder added to the flow rate of sewage, so that there is enough nano-magnetic powder to adsorb microplastics in sewage, thereby ensuring the adsorption effect of microplastics to a certain extent, reducing the residual amount of microplastics in sewage, and thus improving the quality of sewage purification treatment;

[0021] (3) This scheme can realize automatic and flexible adjustment of the sewage inflow by setting up an adjustment component, so that the sewage inflow and the amount of nano-magnetic powder added are maintained within an appropriate range, thereby further improving the collection effect of microplastics in sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a top view of the overall structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 Middle AA section view;

[0025] Figure 4 For the present invention Figure 1 Middle BB section view;

[0026] Figure 5 For the present invention Figure 2 Middle CC section view;

[0027] Figure 6 For the present invention Figure 2 Middle DD section view;

[0028] Figure 7 For the present invention Figure 3 The enlarged schematic diagram at E in the middle;

[0029] Figure 8 For the present invention Figure 5 The enlarged schematic diagram at F in the middle;

[0030] Fig. 9 For the present invention Figure 3 The enlarged schematic diagram at G in the middle;

[0031] Fig.10 For the present invention Figure 6 Enlarged schematic diagram at H in the middle.

[0032] Description of the numbers in the figure:

[0033] 11. Processing tank; 12. Support legs; 13. Feeding pipe; 14. Water inlet pipe; 15. Feed hopper; 16. Collecting hopper; 17. Drain pipe; 18. Retaining ring; 19. Feeding trough; 20. Guide plate; 21. Collecting box; 22. Drain pipe; 23. Magnetic roller; 24. Mandrel; 25. Scraper; 26. Baffle; 27. Rotating sleeve; 28. Fixed frame; 29. ​​Base; 30. Reciprocating screw rod; 31. Paddle; 32. Cleaning plate; 33. Filter screen 1; 34. Top plate; 35. Guide groove; 36. Sealing plate; 37. Slide rod; 38. Block; 39. Partition; 40. Adjusting cylinder; 41. Float plate; 42. Water inlet groove; 43. Filter screen 2; 44. Movable plate; 45. Connecting plate; 46. Movable groove; 47. Float box; 48. Cavity; 49. Movable rod; 50. Mounting block; 51. Gate valve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 7 , a device for collecting microplastics in rural domestic sewage, comprising a treatment tank 11, a guide plate 20 is fixedly connected to the inner surface of the treatment tank 11, a feeding pipe 13 is fixedly connected to the outer surface of the upper end of the treatment tank 11, the lower end of the feeding pipe 13 penetrates the inner side of the treatment tank 11, and a feeding assembly is arranged on the outer side of the feeding pipe 13;

[0036] The feeding assembly includes a rotating sleeve 27 rotatably connected to the outer surface of the feeding pipe 13, the outer surface of the rotating sleeve 27 is fixedly connected to a paddle 31, the inner surface of the rotating sleeve 27 is fixedly connected to a fixing frame 28, the outer surface of the fixing frame 28 is spirally connected to a reciprocating screw 30, the upper end of the reciprocating screw 30 is fixedly connected to a slide bar 37, the upper end of the slide bar 37 is fixedly connected to a top plate 34, the top plate 34 is in sliding contact with the inner surface of the feeding pipe 13, the outer surface of the feeding pipe 13 is provided with a feeding trough 19, the inner surface of the feeding pipe 13 is fixedly connected to a sealing plate 36, the outer surface of the slide bar 37 is provided with a guide groove 35, and the slide bar 37 is slidably connected to the sealing plate 36 through the guide groove 35.

[0037] The guide plate 20 is spiral-shaped, a retaining ring 18 is fixedly connected to the upper end of the feeding pipe 13, the outer surface of the top plate 34 is conical, the number of the blades 31 is several groups and distributed in a ring array, the lower end of the processing tank 11 is fixedly connected to the collecting hopper 16, the lower end of the collecting hopper 16 is fixedly connected to the drain pipe 17, and the outer surface of the lower end of the processing tank 11 is fixedly connected to the support leg 12.

[0038] By adopting the above technical solution, a large amount of microplastics exist in the domestic sewage after preliminary purification treatment, and the microplastics will remain in the effluent and continue to pollute the environment. Therefore, it is necessary to collect and treat the microplastics in the domestic sewage. The legs 12 support the treatment tank 11. When working, the nano magnetic powder is added to the inside of the feeding pipe 13, and then the sewage is injected into the treatment tank 11. After the sewage falls on the surface of the guide plate 20, it will flow in a spiral shape under the guidance of the guide plate 20. When the water flow falls from the surface of the guide plate 20, it will impact the blade 31, thereby driving the rotating sleeve 27 through the blade 31. The feeding tube 13 supports the rotating sleeve 27 for rotation. The rotating sleeve 27 drives the fixed frame 28 to rotate synchronously during the rotation. The fixed frame 28 is connected with the reciprocating screw 30 through a spiral transmission. As the fixed frame 28 rotates, the reciprocating screw 30 is driven to slide back and forth along the axial direction. The reciprocating screw 30 drives the sliding rod 37 to move synchronously during the movement. The sealing plate 36 separates and seals the inside of the feeding tube 13, and guides the sliding rod 37 through the guide groove 35, so that the sliding rod 37 can only slide linearly and cannot rotate. The sliding rod 37 will The top plate 34 is driven to move synchronously. When the top plate 34 moves upward, the nano magnetic powder on the upper side of the top plate 34 is driven to move into the feeding trough 19. Then the nano magnetic powder is discharged through the feeding trough 19 to the upper side of the guide plate 20 to mix with the sewage. The porous structure of the nano magnetic powder can effectively adsorb and collect micro plastics in the sewage. The nano magnetic powder can have a good adsorption effect on micro plastics of different shapes and sheets. The retaining ring 18 inside the feeding pipe 13 can reduce the probability of leakage of the nano magnetic powder inside the feeding pipe 13 to a certain extent. When the amount of sewage increases, the impact force of the sewage on the blade 31 will also increase. The rotation speed of the rotating sleeve 27 is increased, and the frequency of the up and down reciprocating motion of the reciprocating screw 30 is increased by increasing the rotation speed of the fixed frame 28. The reciprocating screw 30 drives the sliding rod 37 and the top plate 34 to increase the movement frequency, so that the amount of nano-magnetic powder added can be increased to a certain extent. By setting the feeding component, the amount of nano-magnetic powder added can be matched with the flow rate of sewage, so that there can be enough nano-magnetic powder to adsorb microplastics in the sewage, thereby ensuring the adsorption effect of microplastics to a certain extent, reducing the residual amount of microplastics in sewage, and thus improving the quality of sewage purification.

[0039] like Figure 1As shown, the guide plate 20 is fixedly connected to the feeding pipe 13 on the side away from the treatment tank 11, and a collecting assembly is provided on the outer surface of the guide plate 20. The collecting assembly includes a collecting box 21 fixedly connected to the outer surface of the lower end of the guide plate 20, and the upper end of the collecting box 21 is open. A sewage pipe 22 is fixedly connected to the outer surface of the treatment tank 11, and the sewage pipe 22 is connected to the inside of the collecting box 21. A gate valve 51 is fixedly connected to the inner surface of the sewage pipe 22.

[0040] The inner surface of the collecting box 21 is fixedly connected with a core shaft 24, the outer surface of the core shaft 24 is fixedly connected with a magnetic roller 23, the inner surface of the collecting box 21 is fixedly connected with a scraper 25, the scraper 25 is in rotational contact with the outer surface of the magnetic roller 23, the inner surface of the collecting box 21 is fixedly connected with a baffle 26, the outer surface of the upper end of the guide plate 20 is fixedly connected with a block 38, and the blocks 38 are distributed in a parallel array.

[0041] By adopting the above technical scheme, the spiral flow of sewage on the upper side of the guide plate 20 can increase the flow time of sewage to a certain extent, so that the sewage has sufficient time to mix and contact with the nano-magnetic powder. At the same time, the block 38 on the upper surface of the guide plate 20 can interfere with the water flow to form turbulence, so that the water flow flows irregularly on the surface of the guide plate 20, which is conducive to the full mixing and contact of sewage and nano-magnetic powder. The collecting box 21 arranged on the lower side of the guide plate 20 fixedly supports the core shaft 24, and the magnetic roller 23 is rotatably supported by the core shaft 24, so that the magnetic roller 23 can rotate with the core shaft 24 as the fulcrum. During the flow, the sewage will flow through the outer surface of the magnetic roller 23, and the nano-magnetic powder in the sewage will be magnetically adsorbed by the magnetic roller 23, so that the microplastics in the sewage are adsorbed on the surface of the magnetic roller 23 by the nano-magnetic powder. The baffle 26 in the collection box 21 can block the water flow inside the collection box 21 to a certain extent, so that the water flow inside the collection box 21 remains stable. After the work is completed, the nano-magnetic powder and micro-plastics adsorbed on the surface of the magnetic roller 23 can be scraped into the collection box 21 by rotating the magnetic roller 23 in cooperation with the scraper 25, and then the gate valve 51 is opened to discharge the mixture of nano-magnetic powder and micro-plastics to the outside of the treatment tank 11, and then the nano-magnetic powder and micro-plastics are subsequently separated and processed, and the nano-magnetic powder can be recycled and reused. By setting up a collection component, nano-magnetic powder and the magnetic roller 23 are used to cooperate to effectively adsorb and collect micro-plastics in sewage, which can have a good collection effect on micro-plastics of different sizes and shapes, thereby effectively improving the quality of micro-plastic collection.

[0042] like Figure 1As shown, a water inlet pipe 14 is fixedly connected to the outer surface of the upper end of the treatment tank 11, a feed hopper 15 is fixedly connected to the upper end of the water inlet pipe 14, an adjusting component is arranged on the inner side of the water inlet pipe 14, the adjusting component includes a partition 39 fixedly connected to the inner surface of the water inlet pipe 14, an adjusting cylinder 40 is slidably connected to the outer surface of the partition 39, the upper end of the adjusting cylinder 40 is open, and the water inlet pipe 14 is located on the upper side of the guide plate 20.

[0043] The outer surface of the regulating cylinder 40 is provided with water inlet grooves 42 , which are arranged in several groups and are distributed in a ring array. A floating plate 41 is fixedly connected to the outer surface of the lower end of the regulating cylinder 40 . The floating plate 41 is in a circular ring shape and is in sliding contact with the inner surface of the water inlet pipe 14 .

[0044] By adopting the above technical solution, during operation, sewage is injected into the water inlet pipe 14 through the feed hopper 15. The water inlet pipe 14 supports the sliding of the regulating cylinder 40 through the partition 39. The sewage enters the regulating cylinder 40 from the upper end of the regulating cylinder 40, and then enters the treatment tank 11 through the water inlet groove 42 on the surface of the regulating cylinder 40. In order to keep the sewage inflow stable and reduce the influence of water volume changes on the microplastic adsorption effect, an adjustment component is set. When the sewage inflow is too much, the sewage will remain on the upper surface of the guide plate 20 and spread to Inside the water inlet pipe 14, the float plate 41 will slide upward along the inside of the water inlet pipe 14 due to the buoyancy of the water, and the float plate 41 will drive the adjusting cylinder 40 to move upward synchronously during the movement. At this time, the area of ​​the water inlet groove 42 on the upper side of the partition 39 will decrease accordingly, thereby causing the amount of sewage entering the water to decrease. The amount of sewage entering the water can be automatically and flexibly adjusted, so that the amount of sewage entering the water and the amount of nano-magnetic powder added are maintained within an appropriate range, thereby further improving the collection effect of microplastics in sewage.

[0045] like Figure 1 As shown, a filter assembly 1 is provided inside the treatment tank 11, and the filter assembly 1 includes a filter screen 33 fixedly connected to the lower side of the inner surface of the treatment tank 11, the filter screen 33 is conical and located at the lower side of the guide plate 20, and the upper end of the filter screen 33 is fixedly connected to a base 29, the base 29 is annular, and the outer surface of the base 29 is rotatably connected to the rotating sleeve 27.

[0046] The outer surface of the upper end of the base 29 is in rotational contact with the fixed frame 28, and the cleaning plate 32 is fixedly connected to the lower end of the rotating sleeve 27. The number of the cleaning plates 32 is two groups and they are symmetrically distributed. The outer surface of the lower end of the cleaning plate 32 is in rotational contact with the upper end of the filter screen 33.

[0047] By adopting the above technical scheme, the sewage falls from the upper side of the guide plate 20 to the outer surface of the filter screen 33, and the residual microplastics in the sewage are further collected and adsorbed by the filter screen 33. The treatment tank 11 supports the base 29 through the filter screen 33, so that the base 29 supports the fixed frame 28 for rotation. The rotating sleeve 27 will drive the cleaning plate 32 to rotate synchronously during the rotation process, and the microplastics attached to the upper surface of the filter screen 33 are scraped and cleaned by the cleaning plate 32, so as to ensure the permeability of the filter screen, and then the filtering quality of the filter screen 33 can be improved to a certain extent. After passing through the filter screen 33, the sewage will fall to the inside of the collecting hopper 16, and then be discharged to the outside of the treatment tank 11 through the drain pipe 17 for subsequent processing.

[0048] like Figure 1 As shown, a filter assembly 2 is arranged on the upper side of the guide plate 20, and the filter assembly 2 includes a filter screen 43 fixedly connected to the outer surface of the upper end of the guide plate 20, and a connecting plate 45 is fixedly connected to the rear side of the outer surface of the filter screen 43. The connecting plates 45 are in two groups and are distributed in parallel. A movable groove 46 is opened on the outer surface of the connecting plate 45, and a movable rod 49 is slidably connected to the inner side of the movable groove 46.

[0049] The outer surface of the movable rod 49 is fixedly connected with a movable plate 44, and the movable plate 44 is in sliding contact with the outer surface of the filter screen 43. The outer surface of the movable rod 49 is fixedly connected with a mounting block 50, and the mounting block 50 is fixedly connected with a buoyancy box 47 at one end away from the movable rod 49, and a cavity 48 is embedded inside the buoyancy box 47.

[0050] By adopting the above technical solution, the sewage gradually flows downward along the surface of the guide plate 20, and then the sewage will contact the filter screen 43, and the remaining microplastics in the sewage will be adsorbed and collected by the filter screen 43, and then the sewage will flow downward through the filter screen 43 and impact the paddle 31, and at the same time, the buoyancy box 47 will float upward under the buoyancy of the sewage, and the buoyancy box 47 will drive the movable rod 49 to move upward synchronously through the mounting block 50, and the cavity 48 inside the buoyancy box 47 can reduce the deadweight of the buoyancy box 47, and the connecting plate 45 slides and guides the movable rod 49 through the movable groove 46, so that the movable rod 49 can The movable plate 44 is driven to move synchronously with the movable rod 49 during the movement, and the microplastics attached to the surface of the filter screen 43 are scraped and collected by the movable plate 44. After the work is completed, the sewage stops being injected into the treatment tank 11. At this time, the movable plate 44 slides downward under the action of gravity, thereby driving the movable plate 44 to continue to scrape and clean the surface of the filter screen 43, so as to better collect and treat the microplastics in the sewage, thereby further improving the collection and adsorption quality of the microplastics in the sewage, and then reducing the impact of the microplastics in the sewage on the ecological environment.

[0051] Instructions for use: During operation, the sewage is injected into the water inlet pipe 14, and the sewage enters the treatment tank 11 through the water inlet groove 42 on the surface of the regulating cylinder 40. After the sewage falls on the surface of the guide plate 20, it will flow in a spiral shape under the guidance of the guide plate 20. When the water flows down from the surface of the guide plate 20, the rotating sleeve 27 is driven to rotate by the paddle 31. The reciprocating screw 30 drives the top plate 34 to move synchronously through the sliding rod 37. When the top plate 34 moves upward, it drives the nano-magnetic powder on the upper side of the top plate 34 to move into the feeding trough 19, and then the nano-magnetic powder is discharged through the feeding trough 19 to the upper side of the guide plate 20 to mix with the sewage. The porous structure of the nano-magnetic powder is used to effectively adsorb and collect microplastics in the sewage, and the sewage is removed. During the flow process, water will flow through the outer surface of the magnetic roller 23, and the nano-magnetic powder in the sewage will be magnetically adsorbed by the magnetic roller 23, so that the microplastics in the sewage will be adsorbed on the outer surface of the magnetic roller 23 by the nano-magnetic powder, and the water inlet of the sewage will be adjusted by the adjusting component. Then the sewage will contact the filter mesh 43, and the remaining microplastics in the sewage will be adsorbed and collected by the filter mesh 43, and the microplastics attached to the surface of the filter mesh 43 will be scraped and collected by the movable plate 44. The sewage falls from the upper side of the guide plate 20 to the outer surface of the filter mesh 33, and the residual microplastics in the sewage will be further collected and adsorbed by the filter mesh 33, thereby improving the filtration quality of the filter mesh 33 to a certain extent.

[0052] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for collecting microplastics in rural domestic sewage, comprising a treatment tank (11), characterized in that: The inner surface of the processing tank (11) is fixedly connected to a guide plate (20), the outer surface of the upper end of the processing tank (11) is fixedly connected to a feeding pipe (13), the lower end of the feeding pipe (13) penetrates the inner side of the processing tank (11), and a feeding assembly is arranged on the outer side of the feeding pipe (13); The feeding assembly comprises a rotating sleeve (27) rotatably connected to the outer surface of the feeding pipe (13), the outer surface of the rotating sleeve (27) is fixedly connected to a paddle (31), the inner surface of the rotating sleeve (27) is fixedly connected to a fixing frame (28), the outer surface of the fixing frame (28) is spirally connected to a reciprocating screw (30), the upper end of the reciprocating screw (30) is fixedly connected to a slide bar (37), the upper end of the slide bar (37) is fixedly connected to a top plate (34), the top plate (34) is in sliding contact with the inner surface of the feeding pipe (13), the outer surface of the feeding pipe (13) is provided with a feeding trough (19), the inner surface of the feeding pipe (13) is fixedly connected to a sealing plate (36), the outer surface of the sliding rod (37) is provided with a guide groove (35), and the sliding rod (37) is slidably connected to the sealing plate (36) via the guide groove (35); The guide plate (20) is spiral-shaped, and a second filter assembly is arranged on the upper side of the guide plate (20). The second filter assembly comprises a second filter screen (43) fixedly connected to the outer surface of the upper end of the guide plate (20). A connecting plate (45) is fixedly connected to the rear side of the outer surface of the second filter screen (43). The connecting plates (45) are in two groups and are arranged in parallel. A movable groove (46) is formed on the outer surface of the connecting plate (45), and a movable rod (49) is slidably connected to the inner side of the movable groove (46). The outer surface of the movable rod (49) is fixedly connected to a movable plate (44), and the movable plate (44) is in sliding contact with the outer surface of the second filter screen (43). The outer surface of the movable rod (49) is fixedly connected to a mounting block (50), and the mounting block (50) is fixedly connected to a buoyancy box (47) at one end away from the movable rod (49), and a cavity (48) is embedded in the inner side of the buoyancy box (47).

2. A device for collecting microplastics in rural domestic sewage according to claim 1, characterized in that: The number of the feeding troughs (19) is a plurality of groups and they are distributed in a ring array; the upper end of the feeding pipe (13) is fixedly connected to a retaining ring (18); the outer surface of the top plate (34) is conical; the number of the paddles (31) is a plurality of groups and they are distributed in a ring array; the lower end of the processing tank (11) is fixedly connected to a collecting hopper (16); the lower end of the collecting hopper (16) is fixedly connected to a drainage pipe (17); and the outer surface of the lower end of the processing tank (11) is fixedly connected to a support leg (12).

3. A device for collecting microplastics in rural domestic sewage according to claim 2, characterized in that: The guide plate (20) is fixedly connected to the feeding pipe (13) at a side away from the treatment tank (11); a collecting assembly is provided on the outer surface of the guide plate (20); the collecting assembly comprises a collecting box (21) fixedly connected to the outer surface of the lower end of the guide plate (20); the upper end of the collecting box (21) is open; a sewage pipe (22) is fixedly connected to the outer surface of the treatment tank (11); the sewage pipe (22) is connected to the inside of the collecting box (21); and a gate valve (51) is fixedly connected to the inner surface of the sewage pipe (22).

4. A device for collecting microplastics in rural domestic sewage according to claim 3, characterized in that: The inner surface of the collecting box (21) is fixedly connected to a core shaft (24), the outer surface of the core shaft (24) is fixedly connected to a magnetic roller (23), the inner surface of the collecting box (21) is fixedly connected to a scraper (25), the scraper (25) is in rotational contact with the outer surface of the magnetic roller (23), the inner surface of the collecting box (21) is fixedly connected to a baffle (26), and the outer surface of the upper end of the guide plate (20) is fixedly connected to a stopper (38), and the stoppers (38) are distributed in a parallel array.

5. A device for collecting microplastics from rural domestic sewage according to claim 4, characterized in that: The upper outer surface of the treatment tank (11) is fixedly connected to a water inlet pipe (14), the upper end of the water inlet pipe (14) is fixedly connected to a feed hopper (15), an adjustment component is arranged inside the water inlet pipe (14), the adjustment component comprises a baffle (39) fixedly connected to the inner surface of the water inlet pipe (14), an adjustment cylinder (40) is slidably connected to the outer surface of the baffle (39), the lower end of the adjustment cylinder (40) is open, and the water inlet pipe (14) is located on the upper side of the guide plate (20).

6. A device for collecting microplastics in rural domestic sewage according to claim 5, characterized in that: The outer surface of the regulating cylinder (40) is provided with water inlet grooves (42), the number of the water inlet grooves (42) being several groups and distributed in a ring-shaped array, the outer surface of the lower end of the regulating cylinder (40) is fixedly connected with a floating plate (41), the floating plate (41) is in a circular ring shape, and the floating plate (41) is in sliding contact with the inner surface of the water inlet pipe (14).

7. A device for collecting microplastics in rural domestic sewage according to claim 6, characterized in that: A filter assembly 1 is arranged inside the processing tank (11), and the filter assembly 1 comprises a filter screen 1 (33) fixedly connected to the lower side of the inner surface of the processing tank (11), the filter screen 1 (33) is conical and located below the guide plate (20), and a base (29) is fixedly connected to the upper end of the filter screen 1 (33), the base (29) is annular, and the outer surface of the base (29) is rotatably connected to the rotating sleeve (27).

8. The device for collecting microplastics from rural domestic sewage according to claim 7, characterized in that: The outer surface of the upper end of the base (29) is in rotational contact with the fixing frame (28), and the cleaning plate (32) is fixedly connected to the lower end of the rotating sleeve (27). The number of the cleaning plates (32) is two groups and they are symmetrically distributed. The outer surface of the lower end of the cleaning plate (32) is in rotational contact with the upper end of the filter screen (33).

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