A river water purification system

Abstract

The application relates to a river water body purification system. The application is suitable for the technical field of water body purification. The technical scheme comprises the following: a first purification module, which can preliminarily filter and settle sewage to preliminarily filter impurities and suspended matters in the sewage; a second purification module, which can secondarily filter and settle the sewage preliminarily filtered and settled to filter and remove pollutants in the sewage; a third purification module, which can thirdly filter and settle the sewage secondarily filtered and settled to filter and remove organic matters in the sewage; a water storage and discharge module, which can store the sewage thirdly filtered and settled and discharge internal water bodies when the internal water level reaches a preset water level; and an artificial wetland module, which is connected with the water storage and discharge module and can perform plant absorption and microbial degradation treatment on water bodies introduced from the water storage and discharge module to obtain discharged water after purification.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, and in particular to a river water purification system. Background Technology

[0002] In the ex-situ remediation of polluted urban rivers, traditional bypass constructed wetland technology, while possessing advantages such as good ecological properties and low operating costs, suffers from the following prominent problems in practical applications:

[0003] (1) Long hydraulic retention time: In order to ensure the purification effect, constructed wetlands usually require a long hydraulic retention time, which limits the system's treatment capacity and efficiency.

[0004] (2) Prone to clogging: During long-term operation, wetland substrate is prone to clogging due to suspended solids deposition or excessive biofilm growth, resulting in poor water flow, reduced treatment efficiency, and frequent and complex maintenance.

[0005] (3) Large area required: When the amount of water to be treated is large, the area required for artificial wetlands increases significantly, making it difficult to implement in urban areas where space is limited.

[0006] (4) Low modularity and poor flexibility: Traditional artificial wetlands have fixed structures, making it difficult to arrange them flexibly according to site conditions, and are also not conducive to later maintenance and functional upgrades.

[0007] Therefore, there is an urgent need to provide a river water purification system that is structurally sound, highly modular, compact, efficient, resistant to clogging, and adaptable, in order to overcome the above problems and achieve efficient, stable, and sustainable treatment of polluted water bodies. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to provide a river water purification system to address the above-mentioned problems.

[0009] The technical solution adopted by this utility model is: a river water purification system, comprising:

[0010] The first purification module introduces sewage into its input end and can perform preliminary filtration and sedimentation treatment on the sewage to initially filter out impurities and suspended solids in the sewage.

[0011] The second purification module, located at the output end of the first purification module, is capable of performing secondary filtration and sedimentation on the wastewater that has undergone preliminary filtration and sedimentation treatment, so as to filter out pollutants in the wastewater.

[0012] The third purification module, located at the output end of the second purification module, can perform final filtration and sedimentation on the wastewater that has undergone secondary filtration and sedimentation treatment, so as to filter out organic matter in the wastewater.

[0013] The water storage and discharge module is located at the output end of the third purification module. It can store the sewage that has been treated by the final filtration and sedimentation stage, and discharge the internal water when the internal water level reaches the preset level.

[0014] An artificial wetland module is located above the first, second, and third purification modules and is connected to the water storage and discharge module. It can perform plant absorption and microbial degradation treatment on the water introduced from the water storage and discharge module to obtain purified discharge water.

[0015] By employing the aforementioned technical means, and sequentially arranging the first, second, and third purification modules, a multi-stage physicochemical filtration system is formed, which can quickly remove most pollutants, thereby reducing the residence time required by the constructed wetland module. By integrating the first to third purification modules into the lower structure, with the constructed wetland module positioned above, effective use of vertical space is achieved, reducing the overall floor space occupied by the system.

[0016] In some embodiments, the first purification module includes a screen and a sedimentation tank. The inlet end of the sedimentation tank is provided with a screen, which can screen out floating garbage in the sewage flowing into the sedimentation tank. The sedimentation tank can settle the soil or sand in the sewage filtered by the screen.

[0017] In some embodiments, the output end of the first purification module is provided with a water flow distribution pipe, and the water flow distribution pipe is provided with a flow divider plate inside, so that the water introduced into the water flow distribution pipe can flow to both ends through the divider. The output end of the water flow distribution pipe is provided with a plurality of delivery holes corresponding to the input end of the second purification module.

[0018] In some embodiments, the second purification module includes a primary filter tank, a first mounting plate, and multiple primary filter layers. The primary filter tank is located adjacent to the output end of the first purification module. The primary filter tank contains a vertically arranged first mounting plate. The first side of the first mounting plate and the inner wall of the primary filter tank form a settling channel that connects to the output end of the first purification module, allowing the water flowing out of the first purification module to settle at the bottom of the primary filter tank via the settling channel. Multiple primary filter layers are installed between the second side of the first mounting plate and the inner wall of the primary filter tank, allowing the settled water to overflow into the multiple primary filter layers for adsorption, ion exchange, and biological oxidation treatment. The treated water can then flow to the third purification module.

[0019] In some embodiments, the multi-layer primary filter layer sequentially includes a first gravel layer, a zeolite layer, an activated carbon layer, and an activated alumina layer along the water flow direction. The first gravel layer can physically filter to intercept suspended particulate matter and impurities, the zeolite layer can remove ammonia nitrogen pollutants through cation exchange, the activated carbon layer can adsorb some organic matter and odor pollutants, and the activated alumina layer can remove phosphorus pollutants.

[0020] In some embodiments, the third purification module includes a secondary filter tank, a second mounting plate, and a ceramic particle filter layer. The secondary filter tank is located adjacent to the output end of the second purification module. The secondary filter tank contains a vertically arranged second mounting plate. The first side of the second mounting plate and the inner wall of the secondary filter tank form a sedimentation channel that connects to the output end of the second purification module, allowing the water flowing out of the second purification module to settle at the bottom of the secondary filter tank via the sedimentation channel. A ceramic particle filter layer is installed between the second side of the second mounting plate and the inner wall of the secondary filter tank, allowing the settled water to overflow into the ceramic particle filter layer for organic matter removal, nitrification, and denitrification reactions. The treated water can then flow to the water storage and discharge module.

[0021] In some embodiments, the bottom of the first purification module, the second purification module, and the third purification module are all provided with sludge discharge modules. The sludge discharge module includes a sludge collector and a sludge discharge pipe. The bottom of the first purification module, the second purification module, and the third purification module is provided with a correspondingly connected sludge collector, and the bottom of the sludge collector is provided with a correspondingly connected sludge discharge pipe, so that the sludge generated after the water inside the first purification module, the second purification module, and the third purification module is filtered and settled can accumulate in the sludge collector and be discharged to the outside through the sludge discharge pipe.

[0022] In some embodiments, the bottom of the second purification module is provided with a plurality of first air supply pipes, and the bottom of the third purification module is provided with a plurality of second air supply pipes. Both the first and second air supply pipes are connected to an external air source. The air source fills the second or third purification module with air through the first or second air supply pipes to clear the gaps in the filter media inside the second and third purification modules.

[0023] In some embodiments, the water storage and discharge module includes a storage tank, a pump, a level sensor, an automatic valve, and a controller. The pump, level sensor, and automatic valve are all communicatively connected to the controller. The storage tank is installed at the output end of the third purification module. The water output from the third purification module can flow into the storage tank. Drainage pipes are installed at the top and bottom of the side wall of the storage tank, and automatic valves are installed on the drainage pipes. The input end of the pump is connected to the storage tank through a supply pipe. A level sensor is installed inside the storage tank. The output end of the pump is connected to the input end of the artificial wetland module through a delivery pipe.

[0024] If the water level in the storage tank reaches the first preset water level threshold, the level sensor sends a low water level information to the controller, and the controller accordingly controls the opening of the automatic valve at the bottom to release water. If the water level in the storage tank reaches the second preset water level threshold, the level sensor sends a high water level information to the controller, and the controller accordingly controls the opening of the automatic valves at the top and bottom to release water.

[0025] In some embodiments, the constructed wetland module includes a shell, a porous ceramic layer, a soil layer, a second gravel layer, partitions, vegetation rolls, holes, and a deck. The shell is located above the first purification module, the second purification module, and the third purification module. The two side walls of the shell are provided with holes for water inlet and water outlet, respectively. The bottom of the shell is provided with a porous ceramic layer, a soil layer, a second gravel layer, and a vegetation roll in sequence from bottom to top. The deck is located above the shell. The shell is provided with a plurality of partitions arranged in an alternating pattern to adjust the flow channels inside the shell so that the water flows in a Z-shape.

[0026] The beneficial effects of this utility model are:

[0027] 1. By having the wastewater flow sequentially through the first purification module, the second purification module, and the third purification module, a multi-stage filtration structure is formed, which can quickly remove most pollutants, especially organic matter, ammonia, nitrogen, and phosphorus, significantly reducing the pollution load entering the constructed wetland module. This reduces the required residence time of the constructed wetland module and also lowers the risk of blockage, ensuring that the wastewater in the constructed wetland module is within its treatment capacity.

[0028] 2. By employing a tiered filtration method in each purification module, the entire load is avoided by a single medium, reducing the risk of clogging. Additionally, this application includes an air supply device that injects air into the purification modules, helping to prevent clogging of the medium's pores and enhancing water flow.

[0029] 3. By integrating the first to third purification modules into the lower structure and placing the artificial wetland module above it, the vertical space is effectively utilized, significantly reducing the overall floor space occupied by the system. This three-dimensional layout is particularly suitable for urban areas with limited space, improving water treatment capacity per unit area.

[0030] 4. This application features excellent modularity and scalability. Each purification module has a clearly defined function and independent structure, facilitating prefabrication, transportation, and on-site assembly. The constructed wetland is located at the top, allowing for easy disassembly and replacement, and convenient maintenance. Furthermore, it supports the series or parallel operation of multiple systems and can be flexibly configured according to water quality and quantity requirements. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this application.

[0032] Figure 2 This is a schematic diagram of the structure of the second and third purification modules in this application.

[0033] Figure 3 This is a schematic diagram of the water storage and discharge module in this application.

[0034] Figure 4 This is an exploded structural diagram of the artificial wetland module in this application.

[0035] Figure 5 This is a schematic diagram of the planting material structure of the artificial wetland module in this application.

[0036] Figure 6 This is a schematic diagram of the water flow distribution pipe in this application.

[0037] Figure 7 This is a schematic diagram of the flow channel structure within the constructed wetland module of this application.

[0038] Figure 8 This is a schematic diagram of the sludge discharge module in this application.

[0039] Figure 9 It is a layout diagram of the implementation of two or more river water purification systems.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Wastewater; 200. Screen; 300. Grit chamber; 400. Water distribution pipe; 401. Diversion plate; 402. Conveying hole; 500. Primary filter tank; 510. Settling channel; 520. First gravel layer; 530. Zeolite layer; 540. Activated carbon layer; 550. Activated alumina layer; 560. Multi-layer primary filter layer; 580. First air supply pipe; 585. Second air supply pipe; 590. Sludge discharge module; 595. Sludge discharge pipe; 600. Secondary filter tank; 610. Ceramic particle filter layer; 700. Storage tank; 710. Pump; 720. Liquid level sensor; 740. Automatic valve; 800. Constructed wetland module; 810. Vegetation roll; 810a. Vegetation mat; 820. Second gravel layer; 830. Soil layer; 840. Porous ceramic layer; 850. Partition; 860. Shell; 870. Deck; 880. Holes; 900. Purified effluent.

[0042] This specification includes references to "one embodiment" or "implementation". The use of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.

[0043] The term "comprising" is open-ended. As used in the appended claims, it does not exclude additional structures or steps.

[0044] "First," "second," etc. As used in this article, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0046] Combination Figures 1 to 9 As shown, this embodiment is a river water purification system, including a first purification module, a second purification module, a third purification module, a water storage and discharge module, and an artificial wetland module 800. The first purification module, the second purification module, the third purification module, and the water storage and discharge module are sequentially adjacent and connected end to end. The artificial wetland module 800 is located above the first purification module, the second purification module, and the third purification module, and the water storage and discharge module is connected to the artificial wetland module 800. Wastewater 100 is introduced into the input end of the first purification module, so that the wastewater 100 flows sequentially through the first purification module, the second purification module, and the third purification module, and is then stored in the water storage and discharge module. The water storage and discharge module can store the treated water or introduce the treated water into the artificial wetland module 800, and discharge the internal water when the internal water level reaches a preset level.

[0047] The system comprises three main components: a first purification module for preliminary filtration and sedimentation of wastewater 100 to remove impurities and suspended solids; a second purification module for secondary filtration and sedimentation of the wastewater 100 to remove pollutants; and a third purification module for final filtration and sedimentation of the wastewater 100 to remove organic matter. An artificial wetland module 800 absorbs water introduced from the storage and discharge module through plant absorption and microbial degradation, and discharges purified wastewater 900.

[0048] In some implementation schemes, such as Figure 1 As shown, the first purification module includes a screen 200 and a sedimentation tank 300. The inlet end of the sedimentation tank 300 is equipped with a screen 200. The screen 200 can screen out floating garbage or large particles in the sewage 100 flowing into the sedimentation tank 300. The sedimentation tank 300 can settle the soil or sand in the sewage 100 after it has been filtered by the screen 200.

[0049] The screen 200 effectively intercepts large floating debris such as plastic bags and tree branches in the sewage 100, preventing blockage of subsequent treatment units. The grit chamber 300 is used to remove sand and soil with a higher specific gravity from the sewage 100, reducing wear and sedimentation on subsequent filter media. The first purification module realizes the first step of sewage 100 pretreatment, laying the foundation for subsequent efficient treatment.

[0050] Furthermore, such as Figure 5 As shown, the output end of the first purification module is provided with a water flow distribution pipe 400, and the water flow distribution pipe 400 is provided with a diversion plate 401 inside, so that the water introduced into the water flow distribution pipe 400 can flow to both ends through the separation. The output end of the water flow distribution pipe 400 is provided with multiple delivery holes 402 corresponding to the input end of the second purification module.

[0051] Considering that uneven distribution of the incoming water within the primary filter tank 500 would result in significant head loss and reduced treatment efficiency, uniform water flow across the entire surface is crucial. By utilizing the water distribution pipe 400, the diversion plate 401 splits the internal water flow into two streams, which are then evenly introduced into the primary filter tank 500 via the delivery holes 402, thus improving water distribution uniformity.

[0052] In some implementation schemes, such as Figure 1 and Figure 2 As shown, the second purification module includes a primary filter tank 500, a first mounting plate, and multiple primary filter layers 560. The primary filter tank 500 is located adjacent to the output end of the grit chamber 300. The primary filter tank 500 has a vertically arranged first mounting plate inside. The first side of the first mounting plate and the inner wall of the primary filter tank 500 form a sedimentation channel 510 that connects to the output end of the grit chamber 300, so that the water flowing out of the grit chamber 300 settles at the bottom of the primary filter tank 500 through the sedimentation channel 510. Multiple primary filter layers 560 are installed between the second side of the first mounting plate and the inner wall of the primary filter tank 500, so that the settled water overflows into the multiple primary filter layers 560 for adsorption, ion exchange, and biological oxidation treatment. The treated water can then flow to the third purification module.

[0053] Furthermore, such as Figure 2As shown, the multi-layer primary filter layer 560 includes, from bottom to top, a first gravel layer 520, a zeolite layer 530, an activated carbon layer 540, and an activated alumina layer 550. The first gravel layer 520 can physically filter to intercept suspended particulate matter and impurities. The zeolite layer 530 can remove ammonia nitrogen pollutants through cation exchange. The activated carbon layer 540 can adsorb some organic matter and odor pollutants. The activated alumina layer 550 can remove phosphorus pollutants. In this embodiment, a single medium is filled in a module housing 860 made of a porous plate to reduce the mixing between different medium layers. Specifically, in this embodiment, the thickness of the first gravel layer 520 is 60cm~70cm and the particle size is 4cm~5cm, the thickness of the zeolite layer 530 is 30cm~45cm and the particle size is 3cm~4cm, the thickness of the activated carbon layer 540 is 10cm~15cm and the particle size is 1cm~3cm, and the thickness of the activated alumina layer 550 is 2cm~5cm and the particle size is 0.5cm~1cm.

[0054] The primary filtration layer 560 consists of multiple layers, with the thickness and particle size of the filling medium gradually decreasing from bottom to top. The first gravel layer 520 intercepts large particles of impurities, providing preliminary filtration. The cation exchange capacity of zeolite removes ammonia nitrogen, reducing the risk of eutrophication. The activated carbon layer 540 adsorbs organic matter, odors, and pollutants. Activated alumina removes phosphorus (dephosphorization). All layers work together to achieve multi-level removal of pollutants, improving the quality of the effluent.

[0055] In some implementation schemes, such as Figure 2 As shown, the third purification module includes a secondary filter tank 600, a second mounting plate, and a ceramic particle filter layer 610. The secondary filter tank 600 is located adjacent to the output end of the primary filter tank 500. The secondary filter tank 600 has a vertically arranged second mounting plate. The first side of the second mounting plate and the inner wall of the secondary filter tank 600 form a sedimentation channel 510 that connects to the output end of the primary filter tank 500. This allows the water flowing out of the primary filter tank 500 to settle at the bottom of the secondary filter tank 600 through the sedimentation channel 510. The ceramic particle filter layer 610 is installed between the second side of the second mounting plate and the inner wall of the secondary filter tank 600. This allows the settled water to overflow into the ceramic particle filter layer 610 for organic matter removal, nitrification, and denitrification. The treated water can then flow to the water storage and discharge module.

[0056] Furthermore, in this embodiment, the ceramic particle filter layer 610 has a thickness of 80cm~90cm and a particle size of 1cm~2cm. The ceramic particle filter layer 610 can filter, adsorb, and bio-oxidize to remove residual pollutants. Specifically, the medium in the ceramic particle filter layer 610 is a homogeneous medium, housed within a separate mounting housing 860 for easy maintenance.

[0057] Furthermore, in this embodiment, both the primary filter tank 500 and the secondary filter tank 600 are installed at a height of about 1m or more above the ground, thereby reducing the damage to the facility caused by icing in winter.

[0058] The water undergoes physical sedimentation again in the secondary filter tank 600 to remove residual particles. The ceramic particles in the ceramic particle filter layer 610 have good permeability and biological adhesion, which can promote nitrification and denitrification reactions, thereby effectively removing residual organic matter and nitrogen pollutants and further improving water quality.

[0059] In some implementation schemes, such as Figure 2 and Figure 8 As shown, the bottom of the first, second, and third purification modules is equipped with a sludge discharge module 590. The sludge discharge module 590 includes a sludge collector and a sludge discharge pipe 595. The bottom of the grit chamber 300 in the first purification module, the primary filter tank 500 in the second purification module, and the secondary filter tank 600 in the third purification module are equipped with corresponding connected sludge collectors. The bottom of each sludge collector is equipped with a corresponding connected sludge discharge pipe 595, allowing the sludge generated after filtration and sedimentation in the grit chamber 300, primary filter tank 500, and secondary filter tank 600 to accumulate in the corresponding sludge collector and be discharged externally through the sludge discharge pipe 595. Specifically, in this embodiment, the sludge collector has a conical structure, facilitating the centralized discharge of sludge.

[0060] As wastewater 100 moves downward in the settling channel 510, particulate matter gradually settles and is aggregated by the conical structure of the sludge collector, and then transported to a specific site for centralized treatment through the sludge discharge pipe 595.

[0061] In some implementation schemes, such as Figure 2 As shown, the bottom of the primary filter tank 500 in the second purification module is provided with multiple first air supply pipes 580, which are located below the multi-layer primary filter layer 560. The bottom of the secondary filter tank 600 in the third purification module is provided with multiple second air supply pipes 585, which are located below the ceramic particle filter layer 610. Both the first air supply pipes 580 and the second air supply pipes 585 are connected to an external air source. The air source fills the primary filter tank 500 or the secondary filter tank 600 with air through the first air supply pipe 580 or the second air supply pipe 585, respectively, to clear the gaps between the filter media of the multi-layer primary filter layer 560 and the ceramic particle filter layer 610.

[0062] Introducing air increases the oxygen content of the water, thus improving purification efficiency. Simultaneously, it clears pores in the medium, alleviating clogging problems.

[0063] In some implementation schemes, such as Figure 3As shown, the water storage and discharge module includes a storage tank 700, a pump 710, a level sensor 720, an automatic valve 740, and a controller. The pump 710, level sensor 720, and automatic valve 740 are all communicatively connected to the controller. The storage tank 700 is installed at the output end of the secondary filter tank 600. The water output from the secondary filter tank 600 can flow into the storage tank 700. Drainage pipes are installed at the top and bottom of the side wall of the storage tank 700, and automatic valves 740 are installed on the drainage pipes. The input end of the pump 710 is connected to the storage tank 700 through a supply pipe. A level sensor 720 is installed inside the storage tank 700. The output end of the pump 710 is connected to the input end of the artificial wetland module 800 through a delivery pipe.

[0064] If the water level in the storage tank 700 reaches the first preset water level threshold, which is low, the level sensor 720 sends a low water level information to the controller. The controller then opens the automatic valve 740 at the bottom to release water. If the water level in the storage tank 700 reaches the second preset water level threshold, which is close to the top inlet and results in a large input flow rate, the automatic valve 740 at the top may not be able to discharge the water. In this case, the level sensor 720 sends a high water level information to the controller. The controller then simultaneously opens both the top and bottom automatic valves 740 to release water, discharging the water in the storage tank 700 into a river or lake through a drainage pipe. When the controller receives both low and high water level information, it stops the pump 710.

[0065] The treated water is stored in the storage tank 700, which regulates the water volume. The level sensor 720 and the automatic valve 740 are linked to control the automatic drainage, opening the bottom or top valves under different water level conditions to ensure safe system operation. The water is then transported to the constructed wetland module 800 by the pump 710 for further deep treatment to reduce water pollutants.

[0066] In some implementation schemes, such as Figure 4 As shown, the constructed wetland module 800 includes a shell 860, a porous ceramic layer 840, a soil layer 830, a second gravel layer 820, a partition 850, a vegetation roll 810, holes 880, and a deck 870. The shell 860 is located above the sedimentation tank 300, the primary filtration module, and the secondary filtration module. The two end sidewalls of the shell 860 have holes 880 for water inlet and outlet, respectively. The bottom of the shell 860 contains, from bottom to top, the porous ceramic layer 840, the soil layer 830, the second gravel layer 820, and the vegetation roll 810. The deck 870 has openings that allow the vegetation roll 810 to be exposed. The deck 870 is located above the shell 860 and on top of each filtration tank. Figure 5As shown, the planting materials within the constructed wetland module 800 also include a vegetation mat 810a, which can replace the vegetation roll 810. For example... Figure 7 As shown, the shell 860 has multiple staggered baffles 850 inside to adjust the flow channels inside the shell 860 so that the water flows in a Z-shape.

[0067] The vegetation roll 810 absorbs nutrients such as nitrogen and phosphorus, thus exerting an ecological purification function. The rational arrangement of partitions 850 causes the water flow inside the constructed wetland module 800 to be in a Z-shape, which helps to increase the retention time and improve the wastewater purification efficiency.

[0068] Furthermore, in this embodiment, the particle size of the second gravel layer 820 is approximately 10mm to 20mm, and the particle size of the porous ceramic layer 840 is 5mm to 10mm.

[0069] Furthermore, in this embodiment, the deck 870 is primarily made of lightweight material and installed in a predetermined space. When it is necessary to replace the filter media, the prefabricated deck 870 can be disassembled for replacement.

[0070] In some implementation schemes, such as Figure 9 As shown, depending on factors such as site area and landscape requirements, two or more river water purification systems can be connected in series or in parallel.

[0071] The implementation principle of the river water purification system in this embodiment is as follows:

[0072] Wastewater 100 enters the river water purification system. Wastewater 100 first enters the first purification module, where it is intercepted by screen 200 to remove large pieces of floating garbage. After passing through screen 200, it enters the sedimentation tank 300 to remove inorganic particles with a higher specific gravity (such as sand and soil).

[0073] The pre-purified wastewater 100 is evenly introduced into the second purification module through the water distribution pipe 400. The wastewater 100 undergoes secondary sedimentation at the bottom of the primary filter tank 500 via the sedimentation channel 510, and then flows upward through multiple primary filter layers 560. Suspended particles are filtered through the first gravel layer 520, ammonia nitrogen is removed through the zeolite layer 530, organic matter and odors are adsorbed through the activated carbon layer 540, and phosphorus is removed through the activated alumina layer 550. Simultaneously, the first air supply pipe 580 provides oxygen to prevent clogging of the multiple primary filter layers 560.

[0074] Wastewater 100, after primary filtration, continues into the third purification module. After settling again in the secondary filtration tank 600 via the settling channel 510, wastewater 100 then enters the ceramic particle filter layer 610. The ceramic particles have excellent permeability and bio-adhesion, supporting nitrification and denitrification reactions, further removing residual organic matter and nitrogen pollutants. The treated water then flows into the water storage and discharge module.

[0075] The purified water is temporarily stored in the storage tank 700. When the liquid level reaches the set threshold, the controller controls the pump 710 to run or opens the automatic valve 740 to drain the water according to the water level information. The pump 710 then transports the water to the artificial wetland module 800 for final ecological treatment.

[0076] In the constructed wetland module 800, water flows through a Z-shaped path formed by baffles 850, extending the residence time. It absorbs nutrients such as nitrogen and phosphorus through vegetation rolls 810, and uses the combined action of soil layer 830, gravel layer and porous ceramic layer 840 to adsorb, precipitate and filter micro pollutants. Microorganisms form a biofilm on the substrate surface to degrade organic matter, and finally the purified effluent 900 is discharged into natural water bodies.

[0077] The filtration process of the river water purification system in this application employs upward water flow, supplemented by air input through air pipes, which effectively reduces substrate clogging. A cone-shaped sludge collector promotes sediment collection and deposition, facilitating cleaning. In winter, when wetlands cannot hold more water due to pipe freezing, the treated water can be directly discharged into rivers or lakes using the storage tank 700, simplifying winter maintenance. Furthermore, the vertical layout of this application significantly saves land area, making it suitable for urban areas with limited space.

[0078] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A river water purification system, characterized in that, include: The first purification module introduces sewage (100) into its input end and can perform preliminary filtration and sedimentation treatment on the sewage (100) to preliminarily filter impurities and suspended solids in the sewage (100); The second purification module is located at the output end of the first purification module and can perform secondary filtration and sedimentation on the wastewater (100) that has undergone preliminary filtration and sedimentation treatment in order to filter out pollutants in the wastewater (100). The third purification module is located at the output end of the second purification module and can perform final filtration and sedimentation on the wastewater (100) that has undergone secondary filtration and sedimentation treatment in order to filter out organic matter in the wastewater (100). The water storage and discharge module is located at the output end of the third purification module. It can store the sewage (100) that has been treated by the final filtration and sedimentation, and discharge the internal water when the internal water level reaches the preset water level. An artificial wetland module (800) is located above the first purification module, the second purification module and the third purification module, and is connected to the water storage and discharge module. It can perform plant absorption and microbial degradation treatment on the water introduced from the water storage and discharge module to obtain purified discharge water (900).

2. The river water purification system according to claim 1, characterized in that: The first purification module includes a screen (200) and a sedimentation tank (300). The inlet end of the sedimentation tank (300) is equipped with a screen (200). The screen (200) can screen out floating garbage in the sewage (100) flowing into the sedimentation tank (300). The sedimentation tank (300) can settle the soil or sand in the sewage (100) filtered by the screen (200).

3. A river water purification system according to claim 2, characterized in that: The output end of the first purification module is provided with a water flow distribution pipe (400), and the inside of the water flow distribution pipe (400) is provided with a diversion plate (401), so that the water introduced into the water flow distribution pipe (400) can flow to both ends through the separation. The output end of the water flow distribution pipe (400) is provided with multiple delivery holes (402) corresponding to the input end of the second purification module.

4. A river water purification system according to claim 1, characterized in that: The second purification module includes a primary filter tank (500), a first mounting plate, and multiple primary filter layers (560). The primary filter tank (500) is located adjacent to the output end of the first purification module. The primary filter tank (500) is provided with a vertically arranged first mounting plate. The first side of the first mounting plate and the inner wall of the primary filter tank (500) form a sedimentation channel (510) that can connect to the output end of the first purification module. This allows the water flowing out of the first purification module to settle at the bottom of the primary filter tank (500) through the sedimentation channel (510). Multiple primary filter layers (560) are installed between the second side of the first mounting plate and the inner wall of the primary filter tank (500). This allows the settled water to overflow into the multiple primary filter layers (560) for adsorption, ion exchange, and biological oxidation treatment. The treated water can then flow to the third purification module.

5. A river water purification system according to claim 4, characterized in that: The multi-layer primary filter layer (560) includes, in sequence along the water flow direction, a first gravel layer (520), a zeolite layer (530), an activated carbon layer (540), and an activated alumina layer (550). The first gravel layer (520) can physically filter to intercept suspended particulate matter and impurities. The zeolite layer (530) can remove ammonia nitrogen pollutants through cation exchange. The activated carbon layer (540) can adsorb some organic matter and odor pollutants. The activated alumina layer (550) can remove phosphorus pollutants.

6. A river water purification system according to claim 1, characterized in that: The third purification module includes a secondary filter tank (600), a second mounting plate, and a ceramic particle filter layer (610). The secondary filter tank (600) is located adjacent to the output end of the second purification module. The secondary filter tank (600) is provided with a vertically arranged second mounting plate. The first side of the second mounting plate and the inner wall of the secondary filter tank (600) form a sedimentation channel (510) that can connect to the output end of the second purification module. This allows the water flowing out of the second purification module to settle at the bottom of the secondary filter tank (600) through the sedimentation channel (510). A ceramic particle filter layer (610) is installed between the second side of the second mounting plate and the inner wall of the secondary filter tank (600). This allows the settled water to overflow into the ceramic particle filter layer (610) for organic matter removal, nitrification, and denitrification. The treated water can then flow to the water storage and discharge module.

7. A river water purification system according to claim 1, characterized in that: The bottom of the first purification module, the second purification module and the third purification module are all provided with sludge discharge modules (590). The sludge discharge module (590) includes a sludge collector and a sludge discharge pipe (595). The bottom of the first purification module, the second purification module and the third purification module are provided with corresponding connected sludge collectors. The bottom of the sludge collectors is provided with corresponding connected sludge discharge pipes (595), so that the sludge generated after the water inside the first purification module, the second purification module and the third purification module is filtered and settled can be accumulated in the sludge collector and discharged to the outside through the sludge discharge pipe (595).

8. A river water purification system according to claim 1, characterized in that: The bottom of the second purification module is provided with multiple first air supply pipes (580), and the bottom of the third purification module is provided with multiple second air supply pipes (585). Both the first air supply pipes (580) and the second air supply pipes (585) are connected to an external air source. The air source fills the second purification module or the third purification module with air through the first air supply pipes (580) or the second air supply pipes (585) respectively, so as to clear the gaps in the filter media inside the second purification module and the third purification module.

9. A river water purification system according to claim 1, characterized in that: The water storage and discharge module includes a storage tank (700), a pump (710), a level sensor (720), an automatic valve (740), and a controller. The pump (710), level sensor (720), and automatic valve (740) are all connected to the controller. The storage tank (700) is installed at the output end of the third purification module. The water output from the third purification module can flow into the storage tank (700). Drainage pipes are installed at the top and bottom of the side wall of the storage tank (700). Automatic valves (740) are installed on the drainage pipes. The input end of the pump (710) is connected to the storage tank (700) through a supply pipe. A level sensor (720) is installed inside the storage tank (700). The output end of the pump (710) is connected to the input end of the artificial wetland module (800) through a delivery pipe. If the water level in the storage tank (700) reaches the first preset water level threshold, the level sensor (720) sends a low water level information to the controller, and the controller controls the opening of the automatic valve (740) at the bottom to release water. If the water level in the storage tank (700) reaches the second preset water level threshold, the level sensor (720) sends a high water level information to the controller, and the controller controls the opening of the automatic valves (740) at the top and bottom to release water.

10. A river water purification system according to claim 1, characterized in that: The constructed wetland module (800) includes a shell (860), a porous ceramic layer (840), a soil layer (830), a second gravel layer (820), a partition (850), a vegetation roll (810), holes (880), and a deck (870). The shell (860) is located above the first purification module, the second purification module, and the third purification module. The two side walls of the shell (860) are provided with holes (880) for water inlet and water outlet, respectively. The bottom of the shell (860) is provided with a porous ceramic layer (840), a soil layer (830), a second gravel layer (820), and a vegetation roll (810) in sequence from bottom to top. The deck (870) is located above the shell (860). The shell (860) is provided with a plurality of partitions (850) arranged in an alternating manner to adjust the flow channels inside the shell (860) so that the water flows in a Z-shape.

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