A clog-resistant and low-maintenance constructed wetland system

Abstract

This invention belongs to the field of environmental pollution control technology, specifically relating to a clog-resistant and low-maintenance constructed wetland system. The clog-resistant and low-maintenance constructed wetland system is characterized by comprising a sludge removal system, a purification system, and water supply pipelines. The sludge removal system includes a perforated load-bearing plate, with the purification system installed on top of the plate. The bottom of the plate has a sedimentation layer, which is connected to the outside environment through a sludge removal channel. The purification system includes a packing layer, a collection channel, and a spiral sedimentation column. The packing layer is connected to the perforated load-bearing plate, and the collection channel contains the spiral sedimentation column. The water supply pipeline includes an inlet pipe and an outlet pipe, which are respectively located on both sides of the purification system. This invention can significantly improve the purification effect of constructed wetlands and reduce the difficulty and workload of their operation and maintenance.

Description

Technical Field

[0001] This invention belongs to the field of environmental pollution control technology, specifically relating to a blockage-resistant and low-maintenance constructed wetland system. Background Technology

[0002] Constructed wetlands refer to artificially built pools or ditches with a waterproof layer on the bottom, a substrate layer of a certain depth, and aquatic plants. They utilize the synergistic physical, chemical, and biological effects of the substrate, plants, and microorganisms to purify wastewater.

[0003] Constructed wetlands effectively remove suspended solids, organic matter, nitrogen, phosphorus, and other pollutants from wastewater through the synergistic effects of physical, chemical, and biological processes involving fillers, plants, and microorganisms. The seasonal arrangement of wetland plants also creates a pleasing landscape, making them excellent ecological education bases showcasing the functions of wetland ecosystems. Compared to traditional wastewater treatment plants, constructed wetlands have no complex architectural structures, resulting in lower construction costs. Furthermore, their operation relies primarily on the natural ecosystem, requiring minimal mechanical equipment and thus lower operating costs. Therefore, constructed wetlands are widely used in rural wastewater treatment, urban wastewater treatment plant effluent purification, and water quality improvement for slightly polluted water bodies.

[0004] In existing technologies, constructed wetland systems require regular maintenance to ensure stable operation. This includes weed removal, wetland plant harvesting, backwashing, or replacement of the packing material to prevent excessive plant growth from affecting the wetland's hydraulic conditions, secondary pollution from decaying plant debris, and severe clogging that impacts purification efficiency and lifespan. Traditional constructed wetland system designs have the following drawbacks: 1. The soil cover layer is prone to weed growth, which can migrate downwards and cause clogging; 2. Plants are planted directly on the packing material / soil, and only the above-ground parts are removed during harvesting, leaving underground residues that can easily cause clogging; 3. The packing material has a limited adsorption capacity, and its removal efficiency for pollutants such as ammonia nitrogen and total phosphorus decreases after long-term operation, requiring replacement of the packing material to improve purification efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a clog-resistant, low-maintenance constructed wetland system for purifying and filtering polluted water. It automatically and efficiently cleans up blockages accumulated during the purification process, facilitates the replacement of vegetation within the constructed wetland, enables resource recycling, and reduces the accumulation of residues and blockages within the system. This, in turn, improves the purification and filtration efficiency of the constructed wetland.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A clog-resistant, low-maintenance constructed wetland system is characterized by comprising a sludge removal system, a purification system, and water supply pipelines. The sludge removal system includes a perforated load-bearing plate, with the purification system mounted on top of the plate. The bottom of the plate has a sedimentation layer, which is connected to the outside environment via a sludge removal channel. The purification system includes a packing layer, a collection channel, and a spiral settling column. The packing layer is connected to the perforated load-bearing plate, and the collection channel contains the spiral settling column. The water supply pipelines include an inlet pipe and an outlet pipe, which are respectively located on opposite sides of the purification system.

[0008] Furthermore, the spiral settling column comprises a soft, semi-soft, or suspended packing column and settling vanes. The packing column is disposed inside the packing layer, and the bottom of the spiral settling column is movably connected to the collection channel. The spiral settling column can rotate freely. Settling vanes are fixedly surrounded on the arc surface of the packing column, and a gap is left between the outer edge of the settling vanes and the wall of the collection channel.

[0009] Furthermore, the packing column includes a multi-layered frame and multiple soft, semi-soft, or suspended lightweight packing blocks disposed within the frame. The multiple lightweight packing blocks are spaced apart by the frame along the length of the packing column. The frame is fixedly connected to the settling vanes and rotatably connected to the bottom of the collection channel.

[0010] Furthermore, the purification system includes a planting board and purified vegetation. The bottom of the planting board has a hydroponic layer, which is located on top of the filler layer. The purified vegetation is planted on the planting board, and its roots can penetrate into the filler layer as it grows.

[0011] Furthermore, the planting board includes multiple detachable planting blocks, each with a corresponding planting hole. The purified vegetation is planted in the planting holes, and the central axes of the multiple planting holes on each planting board are parallel to each other.

[0012] Furthermore, the purification system includes a baffle wall embedded in the packing layer, which divides the baffle wall into two parts. The baffle wall has through holes located within the packing layer.

[0013] Furthermore, the sludge removal system has multiple sludge removal channels placed within the packing material. It also includes sludge removal valves and sludge removal pipes, with the sludge removal valves installed at the corresponding ends of the sludge removal pipes. When the sludge removal valves are open, blockages in the sedimentation layer are either forced out of the wetland by static head pressure or sucked out of the wetland by the cleaning assembly.

[0014] Furthermore, the purification system includes multiple collection holes distributed on the wall of the collection channel.

[0015] Furthermore, the anti-clogging and low-maintenance constructed wetland system includes a cleaning component, which includes a suction pipe and a flexible end. The end of the suction pipe is sealed to the flexible end. One end of the suction pipe is detachably and sealed to the opening of the collection channel or the end of the sludge discharge channel, and the other end can also be connected to a power pump.

[0016] Furthermore, the material in the filler layer is one or more of crushed stone, gravel, volcanic rock, coal gangue, pebbles, or limestone.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This invention, through the combination of a packing layer, a collection channel, and a spiral settling column, achieves rapid and automatic settling of blockages within the constructed wetland system, reducing clogging during operation. It also enables omnidirectional, dead-angle-free filtration and purification of wastewater through rotation, significantly improving purification efficiency. Specifically, this invention first collects the blockages generated during wastewater purification and filtration in the constructed wetland system into the collection channel. As wastewater flows through the collection channel, the impact force of the water flow drives the spiral settling column within the channel to rotate. Under the rotational traction of the settling vanes of the spiral settling column, the blockages in the collection channel are accelerated to settle to the bottom of the packing layer. An open-ended load-bearing plate is located at the bottom of the packing layer. Through the openings on the open-ended load-bearing plate, the blockages are discharged to the sedimentation layer, thus achieving rapid and automatic settling of blockages within the constructed wetland system, reducing clogging during operation, and also reducing maintenance work on the constructed wetland system. Meanwhile, the spiral sedimentation column contained in the collection channel contains a packing column that can purify sewage. Therefore, while the blockage settles in the collection channel, the sewage can also be filtered and purified in all directions without dead angles through rotation, which greatly improves the purification efficiency.

[0019] 2. This invention can also promptly open the sludge discharge valve in the sludge discharge channel connected to the sedimentation layer when the constructed wetland system is severely clogged. Since the sedimentation layer is sealed, and during the operation of the constructed wetland system, blockages and some sewage continuously flow into the sedimentation layer, a pressure difference is formed between the sedimentation layer and the outside. The sludge discharge valve is a static pressure valve, which can use static pressure and the internal and external pressure difference to automatically discharge the blockages accumulated in the sedimentation layer through the sludge discharge pipe. Furthermore, the cleaning assembly can be used to pressure-pump clean the residual packing material and blockages in the collection channel. First, connect one end of the suction pipe in the cleaning assembly to the opening of the collection channel or the end of the sludge discharge channel to be cleaned in a sealed manner. Then, repeatedly squeeze the soft edge of the cleaning assembly to create a directional suction effect from top to bottom through the pressure difference. Alternatively, connect the other end of the suction pipe to a power pump, and use the pump to suction out the residual packing material and blockages in the collection channel, as well as the blockages in the sludge discharge channel, effectively solving the problem of blockage cleaning in the purification process of the constructed wetland system.

[0020] 3. The present invention has multiple planting blocks on the planting plate, and each planting block has multiple corresponding planting holes. The purified vegetation can be fixed on the planting holes. Each planting block can be disassembled as needed, and each time the planting block is disassembled, the planting block and the purified vegetation fixed on the planting block can be removed together. This facilitates the replacement and recycling of purified vegetation, reduces the residue left in the purification system when replacing purified vegetation, and makes the purification efficiency less affected by the residue left when replacing vegetation.

[0021] Ultimately, this constructed wetland system improves planting methods, facilitates harvesting of purified vegetation and reduces residue accumulation within the system, effectively collects and removes blockages generated within the system, and allows for convenient replacement of the packing material. These improvements significantly enhance the purification effect of the constructed wetland while reducing the difficulty and workload of its operation and maintenance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a clog-resistant and low-maintenance constructed wetland system provided in an embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of the structure of a planting board provided in an embodiment of this disclosure;

[0025] Figure 3This is a schematic diagram of the structure of a planting board provided in an embodiment of this disclosure;

[0026] Figure 4 This is a schematic diagram of the structure of a cleaning assembly provided in an embodiment of this disclosure.

[0027] The symbols in the diagram represent the following meanings:

[0028] 10. Sludge removal system;

[0029] 101. Perforated load-bearing plate; 102. Sedimentation layer; 103. Sludge discharge channel; 1031. Sludge discharge valve; 1032. Sludge discharge pipe;

[0030] 20. Purification system;

[0031] 201. Filler layer; 202. Collection channel; 203. Spiral sedimentation column; 2031. Filler column; 20311. Frame; 20312. Lightweight filler block; 2032. Sedimentation vane; 204. Planting board; 2041. Planting block; 2042. Planting hole; 205. Hydroponic layer; 206. Purifying vegetation; 207. Retaining wall; 208. Collection hole;

[0032] 30. Water supply pipelines;

[0033] 301. Inlet pipe; 302. Outlet pipe;

[0034] 40. Cleaning assembly;

[0035] 401. Suction pipe; 402. Flexible edge end. Detailed Implementation

[0036] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0037] according to Figures 1-4As shown, this disclosure provides a clog-resistant, low-maintenance constructed wetland system, including a sludge removal system 10, a purification system 20, and a water supply pipe 30. The sludge removal system 10 includes a perforated load-bearing plate 101, with the purification system 20 mounted on its top. The bottom of the perforated load-bearing plate 101 has a sedimentation layer 102, which communicates with the outside environment through a sludge removal channel 103. The purification system 20 includes a packing layer 201, a collection channel 202, and a spiral sedimentation column 203. The packing layer 201 is connected to the perforated load-bearing plate 101, and the top surface of the packing layer 201 has a collection channel 202, which houses the spiral sedimentation column 203. The water supply pipe 30 includes an inlet pipe 301 and an outlet pipe 302, which are respectively located on both sides of the purification system 20.

[0038] This invention, through the combination of the packing layer 201, the collection channel 202, and the spiral settling column 203, not only achieves rapid and automatic settling of blockages in the constructed wetland system, reducing blockages during operation, but also filters and purifies wastewater from all angles without dead zones through rotation, thus greatly improving purification efficiency; a detailed description will follow.

[0039] In this invention, wastewater flows into the packing layer 201 of the purification system 20 through the inlet pipe 301. The wastewater is purified and filtered under the action of the packing layer 201. During the wastewater purification and filtration process, the blockages generated are first collected in the collection channel 202. When the wastewater flows through the collection channel 202, the impact force of the water flow will drive the spiral settling column 203 contained in the collection channel 202 to rotate. Under the rotational traction of the spiral settling column 203, the blockages in the collection channel 202 are accelerated to settle to the bottom of the packing layer 201. The perforated load-bearing plate 101 is located at the bottom of the packing layer 201. Through the openings on the perforated load-bearing plate 101, the blockages are discharged to the sedimentation layer 102, thereby realizing the rapid and automatic settling of blockages in the constructed wetland system, reducing blockages in the constructed wetland system during operation, and also reducing the maintenance work of the constructed wetland system. Meanwhile, the spiral sedimentation column 203 contained in the collection channel 202 contains filler material that can purify sewage. Therefore, while the blockage settles in the collection channel, the sewage can also be filtered and purified in all directions without dead angles through rotation, which greatly improves the purification efficiency.

[0040] It is worth noting that the particle size of the packing layer 201 increases layer by layer from top to bottom, which can improve the water flow conditions when sewage flows through the packing layer, improve the purification and filtration efficiency, and make the blockage generated in the packing layer 201 settle to the bottom more easily.

[0041] In this embodiment, the spiral settling column 203 includes a soft, semi-soft, or suspended packing column 2031 and settling vanes 2032. The packing column 2031 is disposed inside the packing layer 201. The bottom of the spiral settling column 203 is movably connected to the collection channel 202, and the spiral settling column 203 can rotate freely. The settling vanes 2032 are fixedly surrounded on the arc surface of the packing column 2031, and a gap is left between the outer edge of the settling vanes 2032 and the wall of the collection channel 202.

[0042] In this invention, when sewage flows through the collection channel 202, the impact force of the water flow will cause the spiral settling column 203 contained in the collection channel 202 to rotate. Under the rotational traction of the settling vanes 2032 of the spiral settling column 203, the blockage in the collection channel 202 will settle faster. At the same time, the spiral settling column 203 contained in the collection channel 202 has a packing column 2031 that can purify sewage, thereby realizing the rapid and automatic settling of blockage in the constructed wetland system, reducing blockage during the operation of the constructed wetland system, and reducing the frequency of manual maintenance.

[0043] In this embodiment, the packing column 2031 includes a multi-layered frame 20311 and multiple soft, semi-soft, or suspended lightweight packing blocks 20312 disposed within the frame. The multiple lightweight packing blocks 20312 are spaced apart by the frame 20311 along the length of the packing column 2031. The frame 20311 is fixedly connected to the settling vanes 2032 and rotatably connected to the bottom of the collection channel 202.

[0044] In this invention, because the frame 20311 is configured with a multi-layer structure, it includes both a vertical shaft that can be rotatably connected to the bottom of the collection channel 202 and several small horizontal discs for placing lightweight packing blocks 20312 to form a multi-layer structure. Therefore, multiple lightweight packing blocks 20312 can be arranged on the multi-layer structure of the frame 20311. The dense and compact arrangement of the lightweight packing blocks 20312 allows the sewage flowing into the collection channel 202 to fully contact the lightweight packing blocks 20312 on the frame 20311. Furthermore, because the lightweight packing blocks 20312 arranged on the frame 20311 are made of a lighter material, it facilitates the rotation of the spiral sedimentation column 203. The lightweight packing blocks 20312 can also be easily removed for cleaning, thus ensuring efficient filtration and purification of sewage within the collection channel 202. Additionally, the lightweight packing blocks 20312 on the frame 20311 can be replaced, facilitating maintenance.

[0045] In this embodiment, the purification system 20 includes a planting board 204 and purified vegetation 206. The bottom of the planting board 204 has a hydroponic layer 205, which is located on top of the filler layer 201. The purified vegetation 206 is planted on the planting board 204, and its roots can penetrate into the filler layer 201 as it grows.

[0046] In this embodiment, the planting board 204 includes a plurality of detachable planting blocks 2041, each of which has a corresponding planting hole 2042. The purified vegetation 206 is planted in the planting holes 2042. The central axes of the plurality of planting holes 2042 on each planting board 204 are parallel to each other.

[0047] In this invention, a plurality of planting blocks 2041 are provided on the planting plate 204, and each planting block 2041 is provided with a plurality of corresponding planting holes 2042. The purification plants 206 can be fixed on the planting holes 2042. Each planting block 2041 can be disassembled as needed, and each time the planting block 2041 is disassembled, the planting block 2041 and the purification plants 206 fixed on the planting block 2041 can be removed together. This facilitates the replacement and resource recycling of the purification plants 206, reduces the residue left in the purification system 20 when the purification plants 206 are replaced, and thus reduces the impact of the residue left when replacing the plants on the purification efficiency.

[0048] In this embodiment, the purification system 20 includes a baffle 207, which is embedded in the filler layer 201 and divides it into two parts. The baffle 207 has through holes located in the filler layer 201.

[0049] In this invention, during the process of filtration and purification of wastewater entering the purification system 20, the flow direction of wastewater in the packing layer 201 is as shown by the arrow in the figure. Since the baffle wall 207 is embedded in the packing layer 201 and separates the entire packing layer 201, it forces some of the wastewater flowing in the packing layer 201 to bypass the baffle wall 207 and flow into another part of the packing layer 201 through the through holes on the baffle wall 207. Therefore, the wastewater can flow through all parts of the packing layer 201 fully and comprehensively, achieving full purification and filtration of the wastewater and improving the purification and filtration effect.

[0050] In this embodiment, the sludge removal system 10 has multiple sludge removal channels 103 placed within the packing and sedimentation layer 102. It also includes a sludge removal valve 1031 and a sludge removal pipe 1032, with the sludge removal valve 1031 installed at the corresponding end of the sludge removal pipe 1032. When the sludge removal valve 1031 is configured to open, blockages in the sedimentation layer 102 are forced out of the wetland by static head pressure, or are sucked out of the wetland by the cleaning assembly 40.

[0051] In this invention, when the constructed wetland system is severely clogged, the sludge discharge valve 1031 in the sludge discharge channel 103 connected to the sedimentation layer 102 can be opened in a timely manner. Since the sedimentation layer 102 is sealed, and during the operation of the constructed wetland system, blockages and some sewage continuously flow into the sedimentation layer 102, a pressure difference is formed between the sedimentation layer 102 and the outside. The sludge discharge valve 1031 is a static pressure valve, which can use static pressure and the pressure difference between the inside and outside to automatically discharge the blockages accumulated in the sedimentation layer 102 through the sludge discharge pipe 1032. When there is a lot of blockage accumulated in the sedimentation layer 102, the cleaning component 40 can be used to suck the blockage out of the wetland. First, connect one end of the suction pipe 401 in the cleaning component 40 to the end of the sludge discharge channel 103 to be cleaned in a sealed manner. Then, repeatedly squeeze the soft edge of the cleaning component 40. Through the pressure difference, a directional suction effect is formed from top to bottom. Alternatively, connect the other end of the suction pipe 401 to a power pump. Through pumping, the blockage in the sludge discharge channel 103 or sedimentation layer 102 can be sucked out.

[0052] In this embodiment, the purification system 20 includes a plurality of collection holes 208, which are distributed on the wall of the collection channel 202.

[0053] In this invention, a number of collection holes 208 are provided on the wall of each collection channel 202. Because the collection holes 208 are embedded in the packing layer 201, the sewage flowing into the packing layer 201 can flow further into the collection channel 202 through the collection holes 208. The channel can be equipped with highly effective soft, semi-soft or suspended packing material according to the specific purification index requirements.

[0054] Figure 4 This is a schematic diagram of the structure of a cleaning assembly provided in an embodiment of this disclosure. See also... Figure 4 In this embodiment, the anti-clogging and low-maintenance constructed wetland system includes a cleaning component 40, which includes a suction pipe 401 and a flexible end 402. The end of the suction pipe 401 is sealed to the flexible end 402. One port of the suction pipe 401 is detachably and sealed to the opening of the collection channel 202 or the end of the sludge discharge channel 103, and the other port can also be connected to a power pump.

[0055] In this invention, the cleaning component 40 can be used to clean the residual filler and blockages in the collection channel 202 by pressure suction. First, one end of the suction pipe 401 in the cleaning component 40 is sealed to the soft edge end 402. Then, the other end of the suction pipe 401 is sealed to the opening of the collection channel 202 to be cleaned. Then, the soft edge end 402 of the cleaning component 40 is repeatedly squeezed. Through the pressure difference, a directional suction effect is formed from top to bottom, thereby sucking out the residual filler and blockages in the collection channel 202. Alternatively, the cleaning assembly 40 can be used to suction and clean the blockages in the sludge discharge channel 103. Similarly, first, one end of the suction pipe 401 in the cleaning assembly 40 is sealed to the flexible end 402, and then the other end of the suction pipe 401 is sealed to the end of the sludge discharge channel 103 to be cleaned. Then, the flexible end 402 of the cleaning assembly 40 is repeatedly squeezed, and through the pressure difference, a directional suction effect is formed from top to bottom, thereby sucking out the blockages in the sludge discharge channel 103. Furthermore, the flexible end sealed to the end of the suction pipe 401 can be directly replaced with a power pump for efficient suction. This can effectively solve the problem of cleaning blockages in the purification process of constructed wetland systems.

[0056] In this embodiment, the material in the filler layer 201 is one or more of crushed stone, gravel, volcanic rock, coal gangue, pebbles, or limestone.

[0057] The basic concepts have been described above. It is clear that the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, various modifications, improvements, and deviations may be made to this specification by those skilled in the art. Such modifications, improvements, and deviations are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0058] Furthermore, those skilled in the art will understand that various aspects of this specification can be described and illustrated in several patentable ways, including any new and useful combinations of processes, machines, products, or substances, or any new and useful improvements thereto. Accordingly, various aspects of this specification can be executed entirely by hardware, entirely by software including firmware, resident software, microcode, etc., or by a combination of hardware and software. All of the above hardware or software may be referred to as a “data block,” “module,” “engine,” “unit,” “component,” or “system.” Furthermore, various aspects of this specification may be represented as a computer product located on one or more computer-readable media, including computer-readable program code.

[0059] It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terms used in the supplementary materials to this manual and the contents of this manual, the descriptions, definitions, and / or terms used in this manual shall prevail.

[0060] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to the implementations explicitly introduced and described herein.

Claims

1. A clog-resistant, low-maintenance constructed wetland system, characterized in that, It comprises a sludge discharge system (10), a purification system (20) and a water delivery pipeline (30); The sludge discharge system (10) comprises an open-hole bearing plate (101), the top of which is provided with the purification system (20), and the bottom of which is provided with a sedimentation layer (102) which is communicated with the outside through a sludge discharge channel (103); The purification system (20) comprises a filler layer (201), a collection channel (202) and a spiral settling column (203), the filler layer (201) is connected with the open-hole bearing plate (101), the inside of the filler layer (201) is provided with the collection channel (202), and the collection channel (202) is provided with the spiral settling column (203); The water delivery pipeline (30) comprises a water inlet pipeline (301) and a water outlet pipeline (302), and the water inlet pipeline (301) and the water outlet pipeline (302) are arranged on the two sides of the purification system (20) respectively; The spiral settling column (203) comprises a soft or semi-soft or suspended filler column (2031) and a settling spiral blade (2032), the filler column (2031) is arranged in the filler layer (201), the bottom of the spiral settling column (203) is movably connected with the collection channel (202), the spiral settling column (203) can rotate freely, the settling spiral blade (2032) is fixedly arranged on the arc surface of the filler column (2031), and a gap is formed between the outer edge of the settling spiral blade (2032) and the wall surface of the collection channel (202); The filler column (2031) comprises a frame (20311) with a multi-layer structure and a plurality of soft or semi-soft or suspended light filler blocks (20312) arranged in the frame, the plurality of light filler blocks (20312) are separated by the frame (20311) along the length direction of the filler column (2031), the frame (20311) is fixedly connected with the settling spiral blade (2032), and the frame (20311) is movably connected with the bottom of the collection channel (202); The sludge discharge system (10) is provided with a plurality of sludge discharge channels (103) arranged in the filler layer (201) and the sedimentation layer (102), and further comprises a sludge discharge valve (1031) and a sludge discharge pipeline (1032), the sludge discharge valve (1031) is arranged at the end of the corresponding sludge discharge pipeline (1032); When the sludge discharge valve (1031) is opened, the blockage in the sedimentation layer (102) is pressed out of the wetland by the hydrostatic pressure, or the blockage is sucked out of the wetland by the material cleaning assembly (40).

2. The anti-clogging low-maintenance constructed wetland system according to claim 1, characterized in that, The purification system (20) comprises a planting plate (204) and purification vegetation (206), the bottom of the planting plate (204) is provided with a water culture layer (205), and the water culture layer (205) is located at the top of the filler layer (201); The purification vegetation (206) is planted on the planting plate (204), and the root system of the purification vegetation (206) can grow into the filler layer (201).

3. The anti-clogging low-maintenance constructed wetland system according to claim 2, wherein, The planting plate (204) comprises a plurality of detachable planting blocks (2041), and each planting block (2041) is provided with a corresponding planting hole (2042); The purification vegetation (206) is planted in the planting hole (2042); The central axes of the plurality of planting holes (2042) on each planting plate (204) are parallel to each other.

4. The anti-clogging, low-maintenance constructed wetland system of claim 1, wherein, The purification system (20) comprises a retaining wall (207) embedded in the filler layer (201) and separating the filler layer (201) into two parts. The retaining wall (207) is provided with a through hole in the filler layer (201).

5. The anti-clogging, low-maintenance constructed wetland system of claim 1, wherein, The purification system (20) comprises a plurality of collection small holes (208) distributed on the wall surface of the collection channel (202).

6. The anti-clogging, low-maintenance constructed wetland system of claim 1, wherein, The material cleaning assembly (40) comprises a material suction pipe (401) and a soft edge end (402), the end of the material suction pipe (401) is in close connection with the soft edge end (402), one end of the material suction pipe (401) is detachably and closely connected with the opening of the collection channel (202) or the end of the sludge discharge channel (103), and the other end is also connected with a power pump.

7. The anti-clogging, low-maintenance constructed wetland system of claim 1, wherein, The material in the filler layer (201) is one or more of gravel, pebble, volcanic rock, coal gangue, cobble or limestone.

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