River channel water body remediation device

Abstract

The utility model provides a riverway water body remediation device, relates to the technical field of water treatment, and solves the technical problems that a traditional riverway water body treatment method in the prior art is high in cost, easily causes secondary pollution and lacks sustainability. The riverway water body remediation device comprises a base used for being installed and placed in a riverway needing to be remedied; the advection frame is fixedly mounted on one side of the upstream face of the base and used for guiding water flow to flow horizontally, so that suspended particles are separated from water through gravity; the filtering device is fixedly mounted on the upstream face and is used for filtering river channel water body restoration in the water body in the river channel; and the floating bed device is mounted on the top surface of the base so as to absorb nitrogen and phosphorus elements in the water body by placing strong pollution-resistant aquatic plants. Through the ingenious combination of the base, the advection frame, the filtering device and the floating bed device, the technical problems that an existing traditional river channel water body treatment method is high in cost, secondary pollution is easily caused, and sustainability is lacked are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a river water body restoration device. Background Technology

[0002] With rapid urbanization and industrialization, river pollution has become increasingly serious, posing a significant threat to the ecological environment and human health. The main sources of river pollution include industrial wastewater, domestic sewage, and agricultural non-point source pollution. These pollutants contain large amounts of organic matter, nitrogen and phosphorus nutrients, heavy metals, and suspended particulate matter, severely impacting the ecological balance and self-purification capacity of water bodies.

[0003] Limitations of traditional governance methods

[0004] Traditional methods for river water management mainly include physical sedimentation and chemical treatment. While these methods can produce results in a short period of time, they have the following significant shortcomings:

[0005] The costly physical sedimentation method requires the construction of large sedimentation tanks and complex mechanical equipment, resulting in high operating and maintenance costs; the chemical treatment method requires the use of large amounts of reagents, which increases the treatment cost.

[0006] The use of chemicals that can cause secondary pollution may introduce new pollutants, such as residual chemicals or reaction byproducts, which can have long-term effects on aquatic ecosystems. Furthermore, improper handling of sludge can also lead to secondary pollution.

[0007] Traditional methods, lacking sustainability, rely heavily on external intervention and fail to fundamentally improve the self-purification capacity of water bodies, making it difficult to maintain the treatment effect in the long term.

[0008] Therefore, there is an urgent need to develop an economical, efficient, environmentally friendly and sustainable river water restoration technology to overcome the shortcomings of existing technologies. Utility Model Content

[0009] The purpose of this invention is to provide a river water body restoration device to solve the technical problems of high cost, easy secondary pollution, and lack of sustainability of traditional river water body treatment methods in the prior art. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A river water restoration device, comprising:

[0012] A base for installation in the river channel to be repaired, the base being arranged in a figure-7 shape, including a water-facing surface and a top surface;

[0013] A horizontal flow frame, at least one of which is a rectangular through-tube, is fixedly installed on one side of the water-facing side of the base to guide the water flow horizontally so that suspended particles can be separated from the water by gravity.

[0014] A filtration device is fixedly installed on the water-facing side to filter the water in the river for river water restoration.

[0015] The floating bed device is installed on the top surface of the base to absorb nitrogen and phosphorus elements in the water by placing pollution-resistant aquatic plants.

[0016] Furthermore, four advection frames are provided, arranged sequentially along the height of the base. One side of each advection frame faces the water-facing side of the base, while the other side extends horizontally along the river channel to divert water.

[0017] Furthermore, a flocculant inlet is provided at the corner connecting the water-facing surface and the top surface, and a drain outlet is provided on each of the horizontal flow frames. The four horizontal flow frames are arranged sequentially from low to high along the extension direction of the horizontal flow frames, that is, the four drain outlets are arranged in a stepped manner on the side section of the horizontal flow frames.

[0018] Furthermore, the filtration device includes at least one filter plate, which is fixedly installed on the water-facing side of the base, and a filter screen is installed on the filter plate.

[0019] Furthermore, the filter plate includes a first filter plate and a second filter plate, which are stacked on top of each other. The first filter plate is fixedly installed on the outer side of the water-facing side, and the second filter plate is fixedly installed on the side of the first filter plate facing away from the water-facing side. The mesh size of the filter screen on the second filter plate is larger than that on the first filter plate.

[0020] Furthermore, the first filter plate has multiple slots arranged along the height extension direction of the first filter plate, and the second filter plate has multiple corresponding slot blocks fixedly installed. The second filter plate can adjust the position of the slot blocks in the slots along the height extension direction of the first filter plate to adjust the mesh on the first filter plate and the mesh on the second filter plate to form an adjustable mesh.

[0021] Furthermore, the floating bed device includes at least one pot base for planting cattails, reeds or canna plants. The top surface of the base is provided with a receiving groove for corresponding pot base and a through hole for contacting sewage. The pot base is embedded in the through hole so that nitrogen and phosphorus in the water can be absorbed by the plant roots, while providing an attachment substrate for microorganisms and enhancing biodegradation capacity.

[0022] Furthermore, the through holes are provided in multiple ways and are evenly arranged along the circumference. The basin base is provided with multiple water inlets, which are arranged corresponding to the through holes. Plant roots can enter the through holes through the water inlets and come into contact with sewage.

[0023] Furthermore, the basin base is rotatably disposed within the through hole, and the overlapping area of ​​the water inlet hole and the through hole is adjusted by rotating the angle to adjust the number of plant roots entering the sewage.

[0024] Furthermore, the top of the base is provided with a filling trough for accommodating ceramsite, volcanic rock or activated carbon filler, and the base is also provided with a connecting trough at the bottom of the filling trough for sewage to enter. The filling trough is arranged around the accommodating trough to provide a growth environment for microorganisms.

[0025] The river water restoration device provided by this utility model effectively solves the problems of high cost, easy secondary pollution, and lack of sustainability in existing river water treatment methods, and effectively reduces costs and improves sustainability. The specific technical effects are as follows:

[0026] Cost reduction

[0027] This utility model's river water restoration device eliminates the need for large sedimentation tanks and complex mechanical equipment. Compared to physical sedimentation methods, it cleverly utilizes the river's own space for water restoration through structural design such as a base and a horizontal flow frame, reducing the amount of civil engineering work and the cost of purchasing complex equipment.

[0028] It eliminates the need for large-scale use of chemical agents, avoiding the high costs associated with chemical treatments and thus significantly reducing overall treatment costs.

[0029] In terms of reducing secondary pollution

[0030] By eliminating the use of chemical agents, no new pollutants, such as residual agents or reaction byproducts, are introduced, thus preventing the long-term impact of chemical agents on the aquatic ecosystem from the source.

[0031] Advection frames utilize gravity to separate suspended particulate matter, which is a physical separation method that is more environmentally friendly than traditional methods that may generate pollution.

[0032] The floating bed device places pollution-resistant aquatic plants to absorb nitrogen and phosphorus elements. This bioremediation method does not produce harmful byproducts, further reducing the possibility of secondary pollution.

[0033] Enhancing sustainability

[0034] The aquatic plants in the floating bed device continuously absorb nitrogen and phosphorus nutrients from the water during their growth process. This not only effectively removes eutrophic substances from the water, but also, as the plants grow and reproduce, their absorption capacity continues, which helps to gradually improve the self-purification capacity of the water.

[0035] The advection framework guides the horizontal flow of water, allowing suspended particles to settle naturally. This design concept, based on the inherent characteristics of the water body and the effect of gravity, reduces reliance on external intervention, making the entire restoration process more in line with the natural laws of the ecosystem and possessing long-term sustainability.

[0036] The entire device has a simple structure and is easy to maintain. It can maintain a stable repair effect for a relatively long period of time, unlike traditional methods that require frequent human intervention and resource input to maintain the treatment results.

[0037] In summary, the river water restoration device provided by this utility model effectively solves the technical problems of high cost, easy secondary pollution, and lack of sustainability of existing traditional river water treatment methods through the ingenious combination of a base, a horizontal frame, a filtration device, and a floating bed device. This device utilizes gravity to separate suspended particulate matter and employs aquatic plants to absorb nitrogen and phosphorus elements. It eliminates the need for large-scale civil engineering facilities and large amounts of chemical agents, thereby reducing treatment costs, minimizing secondary pollution, and enhancing the self-purification capacity of the water body. It is an economical, efficient, environmentally friendly, and sustainable river water restoration solution. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model;

[0040] Figure 2 This is a schematic diagram of the filtration device structure provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the floating bed device provided in an embodiment of the present invention;

[0042] Figure 4 This is a cross-sectional view of the floating bed device provided in an embodiment of this utility model.

[0043] Explanation of reference numerals in the attached drawings: 100, base; 110, flocculant inlet; 120, top surface; 130, water-facing surface; 200, floating bed device; 210, basin base; 220, water inlet; 230, receiving tank; 240, through hole; 250, packing tank; 260, connecting tank; 310, horizontal flow frame; 320, drain outlet; 400, filter device; 410, filter plate; 420, slot; 430, locking block. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0045] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," 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 utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] The following is in conjunction with the appendix Figure 1-4 To further illustrate this application, an embodiment of this application discloses a river water body restoration device.

[0048] Reference Figure 1 As shown, a river water body restoration device includes a base 100, a horizontal frame 310, a filter device 400, and a floating bed device 200.

[0049] The base 100 is placed or installed inside the river channel requiring repair. As the fundamental support structure for the entire device, the stability of the base 100 ensures the proper functioning of all components subsequently installed upon it. For example, the stable installation of the base 100 prevents displacement of the entire repair device when subjected to the impact of river currents, thus guaranteeing the continued effectiveness of the repair work.

[0050] At least one horizontal flow frame 310 is provided and fixedly installed on the base 100. Notably, the horizontal flow frame 310 has a rectangular cross-section and is a cylindrical body extending through the waterway, with its length horizontally aligned with the direction of the river's flow. This design allows the horizontal flow frame 310 to guide the river water flow smoothly, reducing turbulence as the water passes through the device. Technically, this helps prevent the redistribution of pollutants due to turbulent water flow and also facilitates the effective treatment of wastewater by the subsequent filtration device 400.

[0051] The filter device 400 is installed at the front end of the base 100 so that it can preferentially contact the water flow in the river and thus perform preliminary treatment on the sewage in the river.

[0052] The floating bed device 200 is installed on top of the base 100 and absorbs nitrogen and phosphorus from the water by placing highly resistant and pollution-tolerant aquatic plants on it. These aquatic plants are carefully selected for their strong adaptability and efficient nutrient absorption capacity. These plants can effectively reduce the nitrogen and phosphorus content in the water, thereby inhibiting excessive algae growth and improving water quality; furthermore, they can release some beneficial substances through their own metabolic processes, promoting the restoration and balance of the aquatic ecosystem.

[0053] Reference Figure 1 As shown, the base 100 includes a water-facing surface 130 and a top surface 120. One end of the water-facing surface 130 and the top surface 120 are fixedly connected to each other, thus making the base 100 as a whole inverted L-shape, similar to the shape of the number "7". This structural design has unique advantages. Its unique geometric shape can effectively enhance the overall stability of the base 100. Under the impact of river water flow, compared with a base 100 with a single planar structure, this inverted L-shaped base 100 can better disperse the impact force of the water flow and reduce the risk of device displacement.

[0054] The top surface 120 of the base 100 is set parallel to the water surface of the river channel. The main purpose of this design is to install the floating bed device 200. Because the top surface 120 is parallel to the water surface, it ensures that the aquatic plants on the floating bed device 200 receive uniform light, which is crucial for their healthy growth. Good lighting conditions help improve the absorption efficiency of nitrogen and phosphorus elements in the water by aquatic plants, thereby more effectively improving water quality.

[0055] The water-facing surface 130 is inclined, and the filter device 400 is mounted on the water-facing surface 130. The inclined water-facing surface 130 guides the water flow to contact the filter device 400 at a gentler angle, preventing direct vertical impact that could damage or clog it. This design significantly improves the service life and filtration efficiency of the filter device 400. Furthermore, the internal angle between the water-facing surface 130 and the top surface 120 is cleverly used to house the horizontal flow frame 310. Placing the horizontal flow frame 310 at this angle not only fully utilizes the space of the base 100 but also creates a natural water flow buffer zone, allowing the horizontal flow frame 310 to more efficiently guide the water flow smoothly, further optimizing the performance of the entire river water restoration device.

[0056] A flocculant inlet 110 is located at the corner where the water-facing surface 130 and the top surface 120 meet. Positioning the flocculant inlet 110 at this corner creates natural eddies and turbulence when water flows onto the water-facing surface 130. This flow pattern helps the flocculant diffuse rapidly into the water, allowing it to quickly and evenly contact suspended particles, colloids, and other pollutants in the wastewater, accelerating the flocculation reaction. Furthermore, this layout allows the flocculant to flow smoothly into subsequent treatment areas under gravity.

[0057] Reference Figure 1 As shown, in this embodiment, four advection frames 310 are provided. These four advection frames 310 are arranged sequentially along the height direction of the base 100. From a technical point of view, this layout can form a layered water flow guidance system, which helps to treat water flows of different depths and properties separately. One end of each advection frame 310 is fixedly connected to one side of the water-facing surface 130 of the base 100, and the other end extends along the length of the river channel. This arrangement allows the advection frames 310 to cover the water flow area in the width direction of the river channel to the maximum extent, thereby guiding and regulating the water flow more comprehensively.

[0058] Each horizontal flow frame 310 is provided with a discharge port 320, and the discharge ports 320 on the four horizontal flow frames 310 are arranged sequentially from low to high along the extension direction of the horizontal flow frame 310. Specifically, the discharge ports 320 closer to the top surface 120 are further away from the water-facing surface 130, so that the four discharge ports 320 are arranged in a stepped manner on the side section of the horizontal flow frame 310. This design allows for the following effect: during the process of guiding the flow of sewage, since heavier sediments such as sludge are mainly concentrated in the lower layer of the water flow, these sediments in the lowest water flow are less affected by the water flow above; while the clearer water flow can move to the upper layer of the water flow with the help of the discharge ports 320. This is because the stepped arrangement of the discharge ports 320 forms an effective diversion channel between different layers of water flow. Meanwhile, the sediment in the upper layer can flow downwards along the outlet 320. This two-way flow pattern helps to further separate the solid particles and liquid components in the sewage, improve sewage treatment efficiency, and has a positive effect on improving river water quality.

[0059] Reference Figure 1 and Figure 2 As shown, the filtration device 400 includes at least one filter plate 410, which is fixedly installed on the water-facing surface 130 of the base 100 and positioned away from the horizontal flow frame 310. This allows the filter plate 410 to directly face the incoming water direction, ensuring that the water flow first undergoes preliminary treatment by passing through the filter plate 410, thereby effectively intercepting impurities in the water.

[0060] The filter plate 410 specifically includes a first filter plate 410 and a second filter plate 410. The first filter plate 410 is fixedly installed on the water-facing surface 130, with its surface parallel to the inclined water-facing surface 130. This design helps to evenly distribute the impact force of the water flow, reducing excessive scouring of local areas of the filter plate 410 and extending its service life. Multiple slots 420 are formed on the first filter plate 410, and these slots 420 are evenly arranged along the inclined direction of the water-facing surface 130. This even arrangement ensures that the filtration effect of each part is relatively balanced when water flows through the first filter plate 410.

[0061] Multiple locking blocks 430 corresponding to the locking slots 420 are fixedly installed on the second filter plate 410. During installation, the locking blocks 430 are engaged within the locking slots 420, causing the second filter plate 410 to overlap and adhere to the first filter plate 410. Furthermore, the mesh openings on the second filter plate 410 are larger than those on the first filter plate 410, achieving staggered filtration. This staggered filtration method has significant technical implications: large particles are first blocked by the second filter plate 410, while smaller particles are further filtered by the first filter plate 410, thereby improving filtration efficiency and precision.

[0062] When the filtration effect needs to be adjusted, the position of the adjusting block 430, which is engaged in the slot 420 along the height extension direction of the first filter plate 410, can be adjusted to create an adjustable mesh, thus forming an alternating pattern between the meshes on the first and second filter plates 410. This allows for flexible adjustment of the filtration precision according to the actual water quality. For example, in cases of poor water quality and high impurity levels, a smaller adjustable mesh can be selected to improve the filtration effect; while in cases of good water quality, a larger adjustable mesh can be selected to increase the water flow rate and improve overall efficiency.

[0063] Reference Figure 1 and Figure 3 As shown, the floating bed device 200 includes at least one basin seat 210, wherein the top surface 120 of the base 100 has a receiving groove 230 corresponding to the basin seat 210, and the basin seat 210 is embedded in the receiving groove 230. This structural design enables the basin seat 210 to be stably mounted on the base 100, avoiding displacement of the basin seat 210 due to water flow impact, thereby ensuring the stability of the entire floating bed device 200.

[0064] The top surface 120 of the base 100 extends through the bottom surface of the receiving tank 230 and has multiple through holes 240 connecting to its interior. The function of these through holes 240 is to introduce sewage from the riverbed into the receiving tank 230. This design creates a channel for sewage to enter the basin 210, allowing the sewage to reach the vicinity of the plant roots planted in the basin 210 smoothly, providing the basic conditions for the subsequent sewage treatment process.

[0065] Reference Figure 3 and Figure 4 As shown, the bottom surface of the basin 210 has multiple water inlet holes 220, which are connected to multiple through holes 240. This arrangement allows the plants grown in the basin 210 to absorb wastewater, or allows the plant roots to extend into the riverbed through the through holes 240 and water inlet holes 220. This not only allows the plants to directly contact the wastewater for absorption and treatment, but also allows the plant roots to extend further into the riverbed, expanding the range of wastewater treatment by the plants and improving wastewater treatment efficiency.

[0066] The basin 210 is primarily used for planting plants such as cattails, reeds, or canna lilies. These plants absorb nitrogen and phosphorus from the water through their roots, while simultaneously providing a substrate for microorganisms to attach to, thus enhancing biodegradation capabilities. Plant absorption of nitrogen and phosphorus effectively reduces eutrophication, while the provision of a substrate promotes the development of the microbial community. Microorganisms play a crucial role in decomposing organic matter, and the synergistic effect of both significantly improves the biodegradation of wastewater.

[0067] When it is necessary to adjust the biodegradation capacity of wastewater, the corresponding angle between the inlet hole 220 and the through hole 240 can be adjusted by rotating the basin base 210, thereby changing the number of plant roots extending from the overlapping stage of the inlet hole 220 and the through hole 240. This adjustability can be improved when the wastewater volume is large or the pollutant concentration is high, by increasing the number of overlapping inlet holes 220 and through holes 240, allowing more plant roots to come into contact with the wastewater, thus enhancing the biodegradation capacity; while when the wastewater volume is small or the pollutant concentration is low, the number of overlapping can be reduced to adapt to different wastewater treatment needs and achieve flexible control.

[0068] The base 100 is also provided with a packing trough 250 on its top, which is arranged circumferentially around the receiving tank 230. This effectively utilizes the space of the base 100 to form a surrounding sewage treatment area around the receiving tank 230, which helps to improve the sewage purification capacity of the entire floating bed device 200.

[0069] The packing tank 250 is used to hold ceramsite, volcanic rock, or activated carbon packing materials. Ceramsite, with its porous structure and moderate density, can adsorb suspended solids in wastewater as it flows through the packing tank 250, providing a favorable habitat for microorganisms and thus promoting the degradation of organic matter. Volcanic rock, as a packing material, effectively removes pollutants such as ammonia nitrogen from wastewater due to its natural mineral composition and unique pore structure, while also serving as a good carrier for microorganisms. Activated carbon, known for its strong adsorption capacity, can adsorb heavy metal ions and organic pollutants in wastewater. The selection of these three packing materials depends on different wastewater treatment needs, greatly enriching the treatment functions of the floating bed device 200.

[0070] Furthermore, the base 100 is provided with a connecting channel 260 that communicates with the bottom of the packing trough 250 for sewage to enter. This design guides sewage from the riverbed into the packing trough 250 through the connecting channel 260, allowing the sewage to fully contact the various packing materials in the packing trough 250. This ensures sufficient contact time and contact area between the sewage and the packing materials, thereby improving the pollutant removal efficiency and further enhancing the overall sewage treatment performance of the floating bed device 200.

[0071] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A river water body restoration device, characterized in that, include: A base (100) is used for installation in the river channel to be repaired. The base (100) is arranged in the shape of a "7" and includes a water-facing surface (130) and a top surface (120). The horizontal flow frame (310) has at least one cylindrical body that is rectangular and runs through the water. It is fixedly installed on one side of the water-facing surface (130) of the base (100) to guide the water flow to flow horizontally so as to use gravity to separate suspended particles from the water. A filter device (400) is fixedly installed on the water-facing side (130) for filtering the water in the river channel for river water restoration. A floating bed device (200) is installed on the top surface (120) of the base (100) to absorb nitrogen and phosphorus elements in the water by placing pollution-resistant aquatic plants.

2. The river water body restoration device according to claim 1, characterized in that, Four advection frames (310) are provided. The four advection frames (310) are arranged sequentially along the height direction of the base (100). One side port of each advection frame (310) faces the water-facing surface (130) of the base (100), and the other side port extends horizontally along the river channel to divert water.

3. The river water body restoration device according to claim 2, characterized in that, The corner end connecting the water-facing surface (130) and the top surface (120) is provided with a flocculant inlet (110). Each of the advection frames (310) is provided with a drain outlet (320). The four advection frames (310) are arranged sequentially from low to high along the extension direction of the advection frame (310), that is, the four drain outlets (320) are arranged in a stepped manner on the side section of the advection frame (310).

4. The river water body restoration device according to claim 1, characterized in that, The filtration device (400) includes at least one filter plate (410), which is fixedly installed on the water-facing surface (130) of the base (100), and a filter screen is installed on the filter plate (410).

5. A river water body restoration device according to claim 4, characterized in that, The filter plate (410) includes a first filter plate (410) and a second filter plate (410). The first filter plate (410) and the second filter plate are stacked on top of each other. The first filter plate (410) is fixedly installed on the outside of the water-facing surface (130). The second filter plate (410) is fixedly installed on the side of the first filter plate (410) facing away from the water-facing surface (130). The mesh size of the filter screen on the second filter plate (410) is larger than that on the first filter plate (410).

6. A river water body restoration device according to claim 5, characterized in that, The first filter plate (410) has multiple slots (420) arranged along the height extension direction of the first filter plate (410). The second filter plate (410) has multiple corresponding slot blocks (430) fixedly installed. The second filter plate (410) can adjust the position of the slot blocks (430) in the slots (420) along the height extension direction of the first filter plate (410) to adjust the mesh on the first filter plate (410) and the mesh on the second filter plate (410) to form an adjustable mesh.

7. A river water body restoration device according to claim 1, characterized in that, The floating bed device (200) includes at least one pot base (210) for planting cattail, reed or canna plants. The top surface (120) of the base (100) is provided with a receiving groove (230) for corresponding pot base (210) and a through hole (240) for contacting sewage. The pot base (210) is embedded in the through hole (240) so that nitrogen and phosphorus in the water can be absorbed by the plant roots, while providing an attachment substrate for microorganisms and enhancing biodegradation capacity.

8. A river water body restoration device according to claim 7, characterized in that, The through holes (240) are provided in multiple ways and are evenly arranged along the circumference. The basin base (210) is provided with multiple water inlets (220) and the multiple water inlets (220) are provided in correspondence with the through holes (240). Plant roots can enter the through holes (240) through the water inlets (220) and come into contact with sewage.

9. A river water body restoration device according to claim 8, characterized in that, The basin base (210) is rotatably disposed within the through hole (240), and the overlapping area of ​​the water inlet hole (220) and the through hole (240) is adjusted by rotating the angle to adjust the number of plant roots entering the sewage.

10. A river water body restoration device according to claim 7, characterized in that, The base (100) has a filling trough (250) at the top for accommodating ceramsite, volcanic rock or activated carbon filler. The base (100) also has a connecting trough (260) at the bottom of the filling trough (250) for sewage to enter. The filling trough (250) is arranged around the receiving trough (230) to provide a growth environment for microorganisms.

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