Anti-clogging less-maintenance artificial wetland system

Abstract

The invention belongs to the technical field of environmental pollution treatment, and particularly relates to an anti-blocking and less-maintenance constructed wetland system. The invention relates to an anti-clogging less-maintenance artificial wetland system which is characterized by comprising a sludge discharge system, a purification system and a water delivery pipeline. The sludge discharge system comprises a perforated bearing plate, a purification system is mounted at the top of the perforated bearing plate, a precipitation layer is arranged at the bottom of the perforated bearing plate, and the precipitation layer is communicated with the outside through a sludge discharge channel. The purification system comprises a filler layer, a collection channel and a spiral sedimentation column, the filler layer is connected with the perforated bearing plate, the collection channel is formed in the filler layer, and the spiral sedimentation column is contained in the collection channel. The water conveying pipeline comprises a water inlet pipeline and a water outlet pipeline which are arranged on the two sides of the purification system respectively. According to the invention, the purification effect of the constructed wetland can be obviously improved, and the operation and maintenance difficulty and workload of the constructed wetland can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental pollution treatment, and particularly relates to an artificial wetland system with anti-clogging and less maintenance. Background Art

[0002] An artificial wetland refers to a pool or trench built artificially, with an anti-seepage and water-proof layer laid on the bottom surface, filled with a substrate layer of a certain depth, planted with aquatic plants, and the sewage is purified by the triple synergistic effects of the substrate, plants, and microorganisms.

[0003] Through the triple synergistic effects of the filler, plants, and microorganisms, the artificial wetland can effectively remove pollutants such as suspended solids, organic matter, nitrogen, and phosphorus in the sewage. The wetland plants can also create a good landscape effect through seasonal collocation, and it is a good ecological education base for demonstrating the functions of the wetland ecosystem. Compared with traditional sewage treatment plants, the artificial wetland has no complex building structure and low construction cost; and its operation mainly relies on the role of the natural ecosystem, does not require a large number of mechanical equipment, and the operation cost is also relatively low. Therefore, artificial wetlands are widely used in scenarios such as rural sewage treatment, tail water purification of urban sewage treatment plants, and improvement of water quality of slightly polluted water bodies.

[0004] In the prior art, the artificial wetland system needs to be maintained regularly to ensure stable operation. This includes removing weeds, harvesting wetland plants, backwashing or replacing the filler, etc., to prevent the overgrowth of plants from affecting the hydraulic conditions of the wetland, the rotting of plant residues causing secondary pollution, serious clogging affecting the purification effect and service life, etc. The traditional artificial wetland system design has the following disadvantages: 1. The soil covering layer is prone to growing weeds and will migrate downward, resulting in clogging; 2. The plants are directly planted on the filler / soil, and only the above-ground part is removed during harvesting, and the underground residues are easy to cause clogging; 3. The adsorption capacity of the filler is limited, and the removal effect of pollutants such as ammonia nitrogen and total phosphorus decreases after long-term operation, and the filler needs to be replaced to improve the purification effect. Summary of the Invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides an artificial wetland system with anti-clogging and less maintenance, which is used for the purification and filtration of polluted water bodies, automatically and efficiently clears the clogging substances accumulated during the purification process of the artificial wetland system, and can also facilitate the replacement of the purification vegetation in the artificial wetland, carry out resource recycling, and reduce the accumulation of residues in the system to cause clogging. Thereby improving the purification and filtration efficiency of the artificial wetland.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An anti-clogging and low-maintenance constructed wetland system, characterized in that it includes a sludge discharge system, a purification system, and a water conveyance pipeline. The sludge discharge system includes an open-hole load-bearing plate, on the top of which the purification system is installed, and at the bottom of the open-hole load-bearing plate there is a sedimentation layer, and the sedimentation layer communicates with the outside through a sludge discharge channel. The purification system includes a filler layer, a collection channel, and a spiral settling column. The filler layer is connected to the open-hole load-bearing plate, and a collection channel is arranged inside the filler layer, and a spiral settling column is accommodated in the collection channel. The water conveyance pipeline includes a water inlet pipeline and a water outlet pipeline, and the water inlet pipeline and the water outlet pipeline are respectively arranged on both sides of the purification system.

[0008] Further, the spiral settling column includes a soft or semi-soft or suspended filler column and settling vanes. The filler column is arranged inside the filler layer. The bottom of the spiral settling column is movably connected to the collection channel, and the spiral settling column can rotate freely. The settling vanes are fixedly wound around the arc surface of the filler column, and there is a gap between the outer edge of the settling vanes and the wall surface of the collection channel.

[0009] Furthermore, the filler column includes a multi-layered frame body and a plurality of soft or semi-soft or suspended lightweight filler blocks arranged inside the frame body. The plurality of lightweight filler blocks are separated from each other by the frame body along the length direction of the filler column. The frame body is fixedly connected to the settling vanes, and the frame body is rotatably connected to the bottom of the collection channel.

[0010] Furthermore, the purification system includes a planting plate and purification vegetation. The bottom of the planting plate has a hydroponic layer, and the hydroponic layer is located on the top of the filler layer. The purification vegetation is planted on the planting plate, and the roots of the purification vegetation can grow and penetrate into the filler layer.

[0011] Furthermore, the planting plate includes a plurality of detachable planting blocks, and each planting block has a corresponding planting hole. The purification vegetation is planted in the planting holes, and the central axes of the plurality of planting holes on each planting plate are parallel to each other.

[0012] Furthermore, the purification system includes a retaining wall, which is embedded in the filler layer and divides it into two parts. Through holes are opened on the retaining wall, and the through holes are located in the filler layer.

[0013] Furthermore, the sludge discharge system has a plurality of the sludge discharge channels placed in the filler. Additionally, it includes a sludge discharge valve and a sludge discharge pipe, and the sludge discharge valve is installed at the end of the corresponding sludge discharge pipe. When the sludge discharge valve is configured to open, the blockages in the sedimentation layer are pressed out of the wetland by the static head pressure, or the blockages are sucked out of the wetland through the cleaning component.

[0014] Further, the purification system includes a plurality of collection small holes, and the plurality of collection small holes are distributed on the wall surface of the collection channel.

[0015] Further, the clogging - resistant and low - maintenance constructed wetland system includes a material - cleaning component, the material - cleaning component includes a material - suction pipe and a soft - edge end, the end of the material - suction pipe is hermetically connected to the soft - edge end, one port of the material - suction pipe is detachably and hermetically connected to the opening of the collection channel or the end of the sludge - discharging channel, and the other port can also be connected to a power pump.

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

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

[0018] 1. Through the cooperation of the filler layer, the collection channel and the spiral settling column, the present invention not only realizes the rapid automatic settlement of blockages in the constructed wetland system, reduces the blockage of the constructed wetland system during operation, but also can filter and purify sewage in all directions without dead angles by rotating, greatly improving the purification efficiency. Specifically, during the process of sewage purification and filtration in the constructed wetland system of the present invention, the blockages generated are first collected in the collection channel. When the sewage flows through the collection channel, the impact force of the water flow drives the spiral settling column placed in the collection 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 filler layer. The perforated load - bearing plate is located at the bottom of the filler layer. Through the openings on the perforated load - bearing plate, the blockages are discharged into the sedimentation layer, thus realizing the rapid automatic settlement of blockages in the constructed wetland system, reducing the blockage of the constructed wetland system during operation, and also reducing the maintenance work of the constructed wetland system. At the same time, the spiral settling column placed in the collection channel has a filler column that can purify sewage. Therefore, while settling the blockages in the collection channel, it can also filter and purify sewage in all directions without dead angles by rotating, greatly improving the purification efficiency.

[0019] 2. When the artificial wetland system is severely blocked, the sludge discharge valve in the sludge discharge channel connected to the sediment layer can be opened in time. Since the sediment layer is sealed and during the operation of the artificial wetland system, blocking substances and part of the sewage continuously flow into the sediment layer, a pressure difference is formed between the inside and the outside of the sediment layer. The sludge discharge valve is a static pressure valve, and the accumulated blocking substances in the sediment layer can be automatically discharged through the sludge discharge pipe by using the static pressure and the pressure difference between the inside and the outside. The residual fillers and blocking substances in the collection channel can also be cleaned by pressure suction using the material cleaning component. First, one end of the suction pipe in the material cleaning component is hermetically connected to the opening of the collection channel to be cleaned or the end of the sludge discharge channel, and then the soft edge end of the material cleaning component is repeatedly pinched. Through the pressure difference, a directional suction effect is formed from top to bottom, or the other end of the suction pipe is connected to a power pump, and suction is performed through the pump, so as to suck out the residual fillers and blocking substances in the collection channel and also suck out the blocking substances in the sludge discharge channel, effectively solving the problem of cleaning the blocking substances in the artificial wetland system during the purification process.

[0020] 3. The present invention is provided with a plurality of planting blocks on the planting plate, and each planting block is provided with a plurality of corresponding planting holes. The purification vegetation can be fixed in the planting holes. Each planting block can be disassembled according to needs, and each time a planting block is disassembled, the planting block and the purification vegetation fixed on the planting block can be removed together, which is convenient for the replacement and resource recovery and utilization of the purification vegetation, reduces the residues left in the purification system when replacing the purification vegetation, and enables the purification efficiency to be less affected by the residues left by the replaced vegetation.

[0021] Finally, the artificial wetland system can not only improve the plant planting method, facilitate the harvesting of the purification vegetation and reduce the accumulation of residues in the system, but also effectively collect and discharge the blocking substances generated in the system to the outside of the system, and can also realize the convenient replacement of the fillers. These improvements can significantly enhance the purification effect of the artificial wetland, achieving the effect of reducing the operation and maintenance difficulty and workload of the artificial wetland. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 is a schematic structural diagram of an anti-blocking and low-maintenance artificial wetland system provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic structural diagram of a planting plate provided by an embodiment of the present disclosure;

[0025] Figure 3It is a schematic structural diagram of a planting plate provided by an embodiment of the present disclosure;

[0026] Figure 4 It is a schematic structural diagram of a material cleaning component provided by an embodiment of the present disclosure.

[0027] The meanings of the symbols in the figure are as follows:

[0028] 10. Mud discharging system;

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

[0030] 20. Purification system;

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

[0032] 30. Water delivery pipeline;

[0033] 301. Water inlet pipeline; 302. Water outlet pipeline;

[0034] 40. Material cleaning component;

[0035] 401. Suction pipe; 402. Soft edge end. Detailed implementation manners

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

[0037] According to Figures 1 to 4As shown in the figure, an anti-blocking and low-maintenance constructed wetland system provided by an embodiment of the present disclosure includes a sludge discharge system 10, a purification system 20, and a water conveyance pipeline 30. The sludge discharge system 10 includes an open-hole load-bearing plate 101, the purification system 20 is installed on the top of the open-hole load-bearing plate 101, a sedimentation layer 102 is provided at the bottom of the open-hole load-bearing plate 101, and the sedimentation layer 102 communicates with the outside through a sludge discharge channel 103. The purification system 20 includes a filler layer 201, a collection channel 202, and a spiral settling column 203. The filler layer 201 is connected to the open-hole load-bearing plate 101, a collection channel 202 is provided on the top surface of the filler layer 201, and a spiral settling column 203 is accommodated in the collection channel 202. The water conveyance pipeline 30 includes a water inlet pipeline 301 and a water outlet pipeline 302, and the water inlet pipeline 301 and the water outlet pipeline 302 are respectively arranged on both sides of the purification system 20.

[0038] Through the cooperation of the filler layer 201, the collection channel 202, and the spiral settling column 203, the present invention not only realizes the rapid automatic settlement of blockages in the constructed wetland system, reduces the blockage of the constructed wetland system during operation, but also can filter and purify sewage in all directions without dead angles by rotating, greatly improving the purification efficiency; details will be described later.

[0039] In the present invention, sewage flows into the filler layer 201 of the purification system 20 through the water inlet pipeline 301, and the sewage is purified and filtered under the action of the filler layer 201. The blockages generated during the sewage purification and filtration process are first collected in the collection channel 202. When the sewage flows through the collection channel 202, the impact force of the water flow will drive the spiral settling column 203 accommodated 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 filler layer 201. The open-hole load-bearing plate 101 is located at the bottom of the filler layer 201. Through the openings on the open-hole load-bearing plate 101, the blockages are discharged into the sedimentation layer 102, thereby realizing the rapid automatic settlement of blockages in the constructed wetland system, reducing the blockage of the constructed wetland system during operation, and also reducing the maintenance work of the constructed wetland system. At the same time, the spiral settling column 203 accommodated in the collection channel 202 has fillers that can purify sewage, so while settling the blockages in the collection channel, it can also filter and purify sewage in all directions without dead angles by rotating, greatly improving the purification efficiency.

[0040] It should be noted that the particle size of the filler layer 201 increases layer by layer from top to bottom, which can improve the water flow conditions when the sewage flows through the filler layer, enhance the purification and filtration efficiency, and make the blockages generated in the filler layer 201 easier to settle to the bottom.

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

[0042] In the present invention, when sewage flows through the collection channel 202, the impact force of the water flow will drive the spiral sedimentation column 203 placed in the collection channel 202 to rotate. Under the rotational traction of the sedimentation rotating vanes 2032 of the spiral sedimentation column 203, the blockages in the collection channel 202 are accelerated to settle. At the same time, the packing column 2031 capable of purifying sewage is provided in the spiral sedimentation column 203 placed in the collection channel 202, thereby realizing the rapid and automatic settlement of blockages in the constructed wetland system, reducing the blockage of the constructed wetland system during operation, and reducing the frequency of manual maintenance.

[0043] In this embodiment, the packing column 2031 includes a frame body 20311 with a multi-layer structure and a plurality of flexible or semi-flexible or suspended lightweight packing blocks 20312 arranged in the frame body. The plurality of lightweight packing blocks 20312 are separated from each other by the frame body 20311 along the length direction of the packing column 2031. The frame body 20311 is fixedly connected to the sedimentation rotating vanes 2032, and the frame body 20311 is rotatably connected to the bottom of the collection channel 202.

[0044] In the present invention, since the frame body 20311 is arranged in a multi-layer structure, the frame body 20311 includes both a vertical shaft that can be rotatably connected to the bottom of the collection channel 202 and several transverse small discs that can place the lightweight packing blocks 20312 to form a multi-layer structure. Therefore, a plurality of lightweight packing blocks 20312 can be arranged on the multi-layer structure of the frame body 20311. The dense and compact arrangement of the lightweight packing blocks 20312 can enable the sewage flowing into the collection channel 202 to fully contact with the lightweight packing blocks 20312 on the frame body 20311. Also, because the lightweight packing blocks 20312 arranged on the frame body 20311 are made of lighter materials, it is convenient for the spiral sedimentation column 203 to rotate. The lightweight packing blocks 20312 can also be easily taken out for cleaning, thereby ensuring efficient filtration and purification treatment of sewage in the collection channel 202, and also enabling the replacement of the lightweight packing blocks 20312 on the frame body 20311, which is convenient for maintenance.

[0045] In this embodiment, the purification system 20 includes a planting plate 204 and purification vegetation 206. The bottom of the planting plate 204 has a hydroponic layer 205, and the hydroponic layer 205 is located on top of the filler layer 201. The purification vegetation 206 is planted on the planting plate 204, and the root systems of the purification vegetation 206 can grow and penetrate into the filler layer 201 as they grow.

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

[0047] In the present invention, a plurality of planted blocks 2041 are provided on the planting plate 204, and a plurality of corresponding planting holes 2042 are provided on each planted block 2041. The purification vegetation 206 can be fixed in the planting holes 2042. Each planted block 2041 can be detached as needed, and each time a planted block 2041 is detached, the planted block 2041 and the purification vegetation 206 fixed on the planted block 2041 can be removed together. This facilitates the replacement and resource recovery and utilization of the purification vegetation 206, reduces the residues left in the purification system 20 when replacing the purification vegetation 206, and thus can reduce the impact of the residues left by replacing the vegetation on the purification efficiency.

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

[0049] In the present invention, during the process of sewage entering the purification system 20 for filtration and purification, the flow direction of the sewage in the filler layer 201 is as shown by the arrow in the figure. Since the retaining wall 207 is embedded in the filler layer 201 to separate the entire filler layer 201, a part of the sewage flowing in the filler layer 201 must bypass the retaining wall 207 and flow into the other part of the filler layer 201 through the through holes on the retaining wall 207. Therefore, the sewage can fully and comprehensively flow through each part of the filler layer 201, realizing the full purification and filtration of the sewage and improving the purification and filtration effect.

[0050] In this embodiment, the sludge discharge system 10 has a plurality of the sludge discharge channels 103 placed in the filler and sedimentation layer 102. It further includes a sludge discharge valve 1031 and a sludge discharge pipe 1032. The sludge discharge valve 1031 is installed at the end of the corresponding sludge discharge pipe 1032. When the sludge discharge valve 1031 is configured to open, the blockages in the sedimentation layer 102 are pressed out of the wetland by the static head pressure or sucked out of the wetland through the cleaning component 40.

[0051] In the present invention, when the artificial wetland system is severely blocked, the sludge discharge valve 1031 in the sludge discharge channel 103 communicating with the sediment layer 102 can be opened in time. Since the sediment layer 102 is sealed and during the operation of the artificial wetland system, blocking substances and part of the sewage continuously flow into the sediment layer 102, a pressure difference is formed between the inside of the sediment layer 102 and the outside. The sludge discharge valve 1031 is a static pressure valve, and the blocking substances accumulated in the sediment layer 102 can be automatically discharged through the sludge discharge pipe 1032 by using the static pressure and the internal and external pressure differences. When there are more blocking substances accumulated in the sediment layer 102, the cleaning component 40 can also be used to suck out the blocking substances from the wetland. First, one end of the material suction pipe 401 in the cleaning component 40 is hermetically connected to the end of the sludge discharge channel 103 to be cleaned, and then the soft edge end of the cleaning component 40 is repeatedly pinched. Through the pressure difference, a directional suction effect is formed from top to bottom, or the other end of the material suction pipe 401 is connected to a power pump, and the blocking substances in the sludge discharge channel 103 or the sediment layer 102 are sucked out by pumping.

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

[0053] In the present invention, a plurality of collection small holes 208 are provided on the wall surface of each collection channel 202. Since the collection small holes 208 are embedded in the packing layer 201, the sewage flowing into the packing layer 201 can further flow into the collection channel 202 through the collection small holes 208. In the channel, soft or semi-soft or suspended packing with strong purification performance can be set according to specific purification index requirements.

[0054] Figure 4 is a schematic structural diagram of a cleaning component provided by an embodiment of the present disclosure. Refer to Figure 4 In this embodiment, the anti-blocking and less-maintenance artificial wetland system includes a cleaning component 40. The cleaning component 40 includes a material suction pipe 401 and a soft edge end 402. The end of the material suction pipe 401 is hermetically connected to the soft edge end 402. One end port of the material suction pipe 401 is detachably and hermetically connected 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 the present invention, the residue filler and blockage in the collection channel 202 can be cleaned by pressure suction using the material cleaning component 40. First, one end of the suction pipe 401 in the material cleaning component 40 is hermetically connected to the soft edge end 402, and then the other end of the suction pipe 401 is hermetically connected to the opening of the collection channel 202 to be cleaned. Then, repeatedly squeeze the soft edge end 402 of the material cleaning component 40 to form a directional suction effect from top to bottom through the pressure difference, so as to suck out the residue filler and blockage in the collection channel 202. Alternatively, the blockage in the sludge discharge channel 103 can be sucked and cleaned using the material cleaning component 40. Similarly, first, one end of the suction pipe 401 in the material cleaning component 40 is hermetically connected to the soft edge end 402, and then the other end of the suction pipe 401 is hermetically connected to the end of the sludge discharge channel 103 to be cleaned. Then, repeatedly squeeze the soft edge end 402 of the material cleaning component 40 to form a directional suction effect from top to bottom through the pressure difference, so as to suck out the blockage in the sludge discharge channel 103. In addition, the soft edge end hermetically connected to the end of the suction pipe 401 can be directly replaced with a power pump connection, and the power pump is enabled for efficient suction. Thus, the problem of cleaning blockages in the purification process of the constructed wetland system can be efficiently solved.

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

[0057] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and deviations to this specification. Such modifications, improvements and deviations are suggested in this specification, so such modifications, improvements and deviations still belong to the spirit and scope of the exemplary embodiments of this specification.

[0058] In addition, those skilled in the art can understand that various aspects of this specification can be described and illustrated by several patentable types or situations, including any new and useful process, machine, product or combination of substances, or any new and useful improvement to them. 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. The above hardware or software can all be referred to as "data block", "module", "engine", "unit", "component" or "system". In addition, various aspects of this specification may be embodied as a computer product located in one or more computer-readable media, which includes computer-readable program codes.

[0059] It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or uses of terms in the supplementary materials of this specification and the content described in this specification, the descriptions, definitions, and / or uses of terms in this specification shall prevail.

[0060] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be regarded as consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to those explicitly presented and described in this specification.

Claims

1. An anti-clogging and low-maintenance constructed wetland system, characterized in that, It includes a sludge discharge system (10), a purification system (20) and a water conveyance pipeline (30); The sludge discharge system (10) includes an open-hole load-bearing plate (101). The purification system (20) is installed on the top of the open-hole load-bearing plate (101). A sedimentation layer (102) is provided at the bottom of the open-hole load-bearing plate (101), and the sedimentation layer (102) communicates with the outside through a sludge discharge channel (103); The purification system (20) includes a packing layer (201), a collection channel (202) and a spiral settling column (203). The packing layer (201) is connected to the open-hole load-bearing plate (101). A collection channel (202) is provided inside the packing layer (201), and a spiral settling column (203) is accommodated in the collection channel (202); The water conveyance pipeline (30) includes a water inlet pipeline (301) and a water outlet pipeline (302). The water inlet pipeline (301) and the water outlet pipeline (302) are respectively arranged on both sides of the purification system (20).

2. The anti-clogging and low-maintenance constructed wetland system according to claim 1, wherein, The spiral settling column (203) includes a flexible or semi-flexible or suspended packing column (2031) and settling vanes (2032). The packing column (2031) is arranged 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; Settling vanes (2032) are fixedly wound around 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 surface of the collection channel (202).

3. The anti-clogging and low-maintenance constructed wetland system according to claim 2, characterized in that, The packing column (2031) includes a multi-layered frame body (20311) and a plurality of flexible or semi-flexible or suspended lightweight packing blocks (20312) arranged inside the frame; A plurality of the lightweight packing blocks (20312) are separated from each other by the frame body (20311) along the length direction of the packing column (2031); The frame body (20311) is fixedly connected to the settling vanes (2032), and the frame body (20311) is rotatably connected to the bottom of the collection channel (202).

4. The anti-clogging and low-maintenance constructed wetland system according to claim 1, characterized in that, The purification system (20) includes a planting plate (204) and purification vegetation (206). A hydroponic layer (205) is provided at the bottom of the planting plate (204), and the hydroponic layer (205) is located on the top of the packing layer (201); The purification vegetation (206) is planted on the planting plate (204), and the roots of the purification vegetation (206) can grow and penetrate into the packing layer (201).

5. The anti-clogging and low-maintenance constructed wetland system according to claim 4, characterized in that, The planting plate (204) includes a plurality of detachable planting blocks (2041), and each planting block (2041) has a corresponding planting hole (2042); The purification vegetation (206) is planted in the planting holes (2042); The central axes of the plurality of planting holes (2042) on each planting plate (204) are parallel to each other.

6. The anti-clogging and low-maintenance constructed wetland system according to claim 1, wherein The purification system (20) includes a retaining wall (207) which is embedded in the filler layer (201) and divides it into two parts; The retaining wall (207) is provided with through holes which are located in the filler layer (201).

7. The clogging-preventing and low-maintenance constructed wetland system according to claim 1, characterized in that, The sludge discharging system (10) has a plurality of the sludge discharging channels (103) placed in the filler layer (201) and the sedimentation layer (102); and further includes a sludge discharging valve (1031) and a sludge discharging pipe (1032), and the sludge discharging valve (1031) is installed at the end of the corresponding sludge discharging pipe (1032); When the sludge discharging valve (1031) is configured to open the valve, the blockage in the sedimentation layer (102) is pressed out of the wetland by the static head pressure, or the blockage is sucked out of the wetland by the material cleaning component (40).

8. The anti-clogging and low-maintenance constructed wetland system according to claim 1, characterized in that, The purification system (20) includes a plurality of collecting small holes (208), and the plurality of collecting small holes (208) are distributed on the wall surface of the collecting channel (202).

9. The anti-clogging and low-maintenance constructed wetland system according to claim 1, characterized in that It includes a material cleaning component (40), and the material cleaning component (40) includes a material suction pipe (401) and a soft edge end (402). The end of the material suction pipe (401) is hermetically connected to the soft edge end (402). One port of the material suction pipe (401) is detachably and hermetically connected to the opening of the collecting channel (202) or the end of the sludge discharging channel (103), and the other port can also be connected to a power pump.

10. The anti-clogging and low-maintenance constructed wetland system according to claim 1, characterized in that, The material in the filler layer (201) is one or more of gravel, gravel, volcanic rock, coal gangue, cobblestone or limestone.

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