Horizontal subsurface flow constructed wetland system capable of adding agricultural biomass carbon source

Abstract

The invention relates to a horizontal subsurface flow constructed wetland system capable of adding an agricultural biomass carbon source, and belongs to the technical field of environmental protection water treatment technologies, the horizontal subsurface flow constructed wetland system comprises an inflow water collecting area, a carbon source adding unit is arranged in the inflow water collecting area, the inflow water collecting area is connected with a ceramsite type wetland unit, the ceramsite type wetland unit is connected with a brick slag type wetland unit, and the brick slag type wetland unit is connected with an agricultural biomass carbon source. The ceramsite type wetland unit is connected with a brick residue type wetland unit, the brick residue type wetland unit is connected with a zeolite type wetland unit, the zeolite type wetland unit is connected with an oyster shell type wetland unit, the oyster shell type wetland unit is connected with an effluent collecting area, and plants are planted on the ceramsite type wetland unit, the brick residue type wetland unit, the zeolite type wetland unit and the oyster shell type wetland unit. Agricultural wastes are arranged in the carbon source adding unit, and water in the inlet water collecting area passes through the carbon source adding unit and the water passing assembly and then enters the ceramsite type wetland unit. The water treatment wetland system has the advantages that sufficient carbon sources are kept in the wetland system, agricultural waste is applied to the water treatment wetland system, and the utilization rate of the agricultural waste is increased.

Description

Technical Field

[0001] The present application relates to the technical field of environmental protection water treatment technology, and in particular to a horizontal subsurface flow artificial wetland system to which agricultural biomass carbon sources can be added. Background Art

[0002] With the acceleration of my country's urbanization process, the demand for water resources continues to increase. At the same time, sewage discharge is highly concentrated, and the water environment is under tremendous pressure. The discharge of nitrogen and phosphorus in sewage into water bodies without meeting the standards is one of the main reasons for the deterioration of the water environment. The discharge of a large amount of nitrogen and phosphorus pollutants into surface water will cause eutrophication of water bodies. Therefore, it is urgent to efficiently remove nitrogen and phosphorus pollutants in sewage. As an environmentally friendly biological sewage treatment technology, artificial wetlands rely on the synergistic effect of plants, substrates, and microorganisms to efficiently remove nitrogen, phosphorus and other pollutants in water, and are widely used in deep sewage treatment. However, there is a common problem of low carbon-nitrogen ratio (C / N) in sewage. The lack of carbon source prevents denitrifying bacteria from obtaining sufficient electron donors, limiting denitrification, thereby inhibiting the denitrification effect of artificial wetland systems.

[0003] Moreover, agricultural biomass such as straw, corn cobs, and rice straw are classified as agricultural waste in China, which is low-cost and has a large output. According to statistics, in 2015, the theoretical output of major crop straw in my country was 1.04 billion tons, and the amount of straw resources that can be collected was 900 million tons, of which only 36.9% was used off the field. The utilization rate of agricultural waste is low.

[0004] At the same time, the existing artificial wetland systems basically use expanded clay and zeolite for water treatment. The diversity and quantity of microbial communities in such wetland systems are relatively small, and the water treatment capacity of the entire system is relatively weak. Summary of the invention

[0005] In order to maintain sufficient carbon sources in wetland systems and apply agricultural waste to water treatment wetland systems, thereby increasing the utilization rate of agricultural waste and improving the water treatment capacity of wetland systems, the present application provides a horizontal subsurface flow artificial wetland system to which agricultural biomass carbon sources can be added.

[0006] The present application provides a horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source, which adopts the following technical solution: A horizontal subsurface artificial wetland system capable of adding an agricultural biomass carbon source comprises an inlet water catchment area, a carbon source adding unit is arranged in the inlet water catchment area, the inlet water catchment area is connected to a ceramsite wetland unit, the ceramsite wetland unit is connected to a brick slag wetland unit, the brick slag wetland unit is connected to a zeolite wetland unit, the zeolite wetland unit is connected to an oyster shell wetland unit, the oyster shell wetland unit is connected to an outlet water catchment area, the ceramsite wetland unit, the brick slag wetland unit, the zeolite wetland unit and the oyster shell wetland unit are connected to a water outlet water catchment area, the ceramsite wetland unit, the brick slag wetland unit, the zeolite wetland unit and the oyster shell wetland unit are connected to a water outlet water catchment area, and the ceramsite wetland unit, the brick slag wetland unit, the zeolite wetland unit and the oyster shell wetland unit are connected to a water outlet water catchment area. Plants are planted on the wetland units. Water-passing components are arranged between the water inlet catchment area and the expanded clay wetland unit, between the expanded clay wetland unit and the brick slag wetland unit, between the brick slag wetland unit and the zeolite wetland unit, between the zeolite wetland unit and the oyster shell wetland unit, and between the oyster shell wetland unit and the water outlet catchment area. Agricultural waste is built into the carbon source addition unit. Water in the water inlet catchment area passes through the carbon source addition unit and the water-passing component and then enters the expanded clay wetland unit.

[0007] By adopting the above technical solution, agricultural waste contains rich cellulose and hemicellulose, which can be added to the artificial wetland system as an external carbon source, providing the required energy for denitrification and self-reproduction of denitrifying bacteria, and can also serve as a carrier for the growth and reproduction of microorganisms; At the same time, agricultural biomass carbon sources have a slow release rate and a long effective period, which can reduce secondary pollution and water quality fluctuations caused by multiple additions. Therefore, using agricultural waste as an additional carbon source for the artificial wetland system not only makes up for the low concentration of organic matter in the influent and the limited denitrification and denitrification of the system, but also improves the effective utilization rate of agricultural waste; In addition, brick slag has a porous structure, which can provide attachment points for microorganisms and effectively absorb pollutants, increasing the wetland system's ability to absorb pollutants, especially heavy metals, phosphates, and ammonia nitrogen. Oyster shells are rich in calcium carbonate, which can adjust the pH value of water bodies and help absorb phosphorus in water. Brick slag and oyster shells provide a good habitat for wetland microorganisms and increase the diversity of microbial populations.

[0008] In summary, this scheme maintains sufficient carbon sources in the wetland system and applies agricultural waste to the water treatment wetland system, thereby improving the utilization rate of agricultural waste and improving the water treatment capacity of the wetland system.

[0009] Optionally, the carbon source addition unit includes a plurality of storage tubes, the storage tubes are used to accommodate agricultural waste, and the storage tubes are provided with a plurality of first water holes.

[0010] Optionally, each of the storage tubes is covered with a cover plate, the storage tubes are square tubes, adjacent storage tubes are spliced ​​with each other, and adjacent cover plates are spliced ​​with each other.

[0011] By adopting the above technical solution, the cover plate isolates the carbon source from contact with oxygen, preventing direct sunlight from accelerating the drying degree of the carbon source and the influence of temperature on the carbon source.

[0012] Optionally, the particle size of the expanded clay in the expanded clay type wetland unit is 5-10mm, the particle size of the brick slag in the brick slag type wetland unit is 10-20mm, the particle size of the zeolite in the zeolite type wetland unit is 8-16mm, and the particle size of the oyster shell in the oyster shell type wetland unit is 20-30mm; the water flow component is a plurality of perforated water distribution pipes, and the plurality of perforated water distribution pipes are arranged in an array.

[0013] Optionally, the plants include reeds, cannas, calamus and irises, the reeds and cannas are planted on the expanded clay type wetland units, the calamus is planted on the brick slag type wetland units and the zeolite type wetland units, and the irises are planted on the oyster shell type wetland units.

[0014] By adopting the above technical solution, reeds have strong pollution resistance and a well-developed root system, which can effectively handle high concentrations of organic matter and pollutants in the incoming water. Its root system can provide more attachment points for denitrifying bacteria and has a strong oxygen transport capacity, which helps to provide initial purification of the water body.

[0015] Canna is not only ornamental, but also has a strong absorption capacity for nutrients such as nitrogen and phosphorus. It is suitable for planting in the ceramsite area after the water quality is slightly treated to further purify the water quality. Canna has a shallow root system and is suitable for planting in the middle and shallow areas.

[0016] Acorus calamus has strong adaptability and can grow well in areas with more minerals, especially in areas with adsorption capacity such as brick slag or zeolite. These areas are usually areas where plants need to further absorb nitrogen and phosphorus after treating some pollutants.

[0017] Iris is a plant that is very suitable for wetland environments and has a strong ability to absorb nitrogen and phosphorus in water. Its rhizomes can provide a good living environment for microorganisms on oyster shells, especially at the end of treatment, which can help further purify the water.

[0018] Optionally, an opening assembly for opening the cover is provided on the water inlet and water collection area, a discharging assembly for pushing agricultural waste out of the storage tube is provided in the storage tube, and a sealing assembly for blocking the first water hole is provided in the storage tube.

[0019] By adopting the above technical solution, agricultural waste is usually replaced within 3-6 months to ensure that sufficient carbon source is provided to the water body. When replacing agricultural waste, first use the opening component to separate the cover from the storage tube, and then install the sealing component to prevent the discharge component from being soaked in water and damaged during the discharge process. Then start the discharge component to push the agricultural waste out of the storage tube. After collecting the pushed agricultural waste, reset the discharge component, put new agricultural waste into the storage tube, and finally take out the sealing component and re-cover the cover to facilitate the replacement of agricultural waste.

[0020] Optionally, the opening component includes a walking plank road, which is arranged at the top of the water inlet and water collection area. A sliding groove is provided in the walking plank road, and the sliding groove passes through the side of the walking plank road facing the cover plate. A baffle is provided on the side of the sliding groove close to the cover plate, and the cover plate is connected to a limiting plate. The cover plate passes through the baffle and extends into the sliding groove, and the limiting plate is located in the sliding groove. When the cover plate is covered on the storage tube, the limiting plate abuts against the baffle, and a number of pull-out grooves are provided on each of the cover plates.

[0021] By adopting the above technical solution, the staff can stand on the walking path, then grab the pull-out groove with their hands, and gradually push the cover plate into the sliding groove, so as to separate the cover plate from the storage tube. When the cover plate needs to be re-covered, it is only necessary to grab the pull-out groove and push the cover plate back out of the sliding groove until the limit plate abuts against the baffle plate, so that the cover plate is re-covered on the storage tube.

[0022] Optionally, the discharging assembly includes a mounting frame, which is rotatably connected to a turntable, and the turntable is driven by a driving member, the mounting frame is hinged with a plurality of first connecting rods, each of the first connecting rods is connected to the turntable through a connecting member, a plurality of the first connecting rods are hinged with a second connecting rod, the middle parts of a plurality of the second connecting rods are hinged with a connecting ring, a plurality of the second connecting rods are hinged with another second connecting rod at one end away from the second connecting rod, and so on, a plurality of connecting rings are stacked above the mounting frame, each of the connecting rings is connected to a plurality of second connecting rods, adjacent second connecting rods are hinged with each other, a plurality of the second connecting rods away from the turntable are connected with a third connecting rod, and all the third connecting rods are hinged with a push plate together, and when the turntable rotates, the driving member drives the first connecting rod to swing.

[0023] By adopting the above technical solution, when discharging, the driving member drives the turntable to rotate, and the rotation drives the first connecting rod to swing, so as to realize the swing of the second connecting rod, and the second connecting rod drives the third connecting rod to swing, so that the push plate and the connecting ring are pushed upward synchronously, and the push plate gradually pushes the agricultural waste out of the storage tube until the push plate is located at the storage tube mouth. At this time, the staff can stand on the walking plank road and the push plate to facilitate the cleaning of agricultural waste; After the agricultural waste is cleaned, the driving member drives the turntable to rotate in the opposite direction, so that the first connecting rod, the second connecting rod and the third connecting rod swing to a folded state. At this time, the connecting ring and the push plate are re-located to the bottom of the storage tube, making it convenient for the staff to add new agricultural waste into the storage tube.

[0024] Optionally, the driving member includes a driving shaft, the driving shaft passes through all the storage tubes, one end of the driving shaft is connected to a motor, a first bevel gear is arranged in each of the storage tubes, the first bevel gear is coaxially fixed on the driving shaft, a second bevel gear is coaxially fixed to the rotating disk, and the first bevel gear is meshed with the corresponding second bevel gear; The linkage includes a spur gear, which is rotatably connected to the mounting frame, and the spur gear corresponds to the first connecting rod one by one. An outer gear ring is arranged on the circumference of the turntable, and the spur gear meshes with the outer gear ring. The spur gear is coaxially connected to a third bevel gear, and a fourth bevel gear is arranged on the first connecting rod, and the fourth bevel gear meshes with the third bevel gear.

[0025] By adopting the above technical solution, the motor drives the drive shaft to rotate, the drive shaft drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear, the turntable and the outer ring gear to rotate synchronously, the outer ring gear drives the spur gear and the third bevel gear to rotate synchronously, and the third bevel gear drives the fourth bevel gear to rotate, so that when the turntable rotates, the first connecting rod is driven to swing, and the second connecting rod and the third connecting rod are swung at the same time to drive the push plate to rise and fall.

[0026] Optionally, the sealing assembly includes an inner nest, which is located in the storage tube, with a sealing space left between the outer wall of the inner nest and the inner wall of the storage tube, the inner nest and the storage tube are connected via a connecting plate, the drive shaft passes through the storage tube, the connecting plate and the inner nest, the agricultural waste, the mounting frame and the push plate are all located in the inner nest, a sealing plate is inserted in the sealing space between the outer wall of the inner nest and the inner wall of the storage tube, the push plate is adapted to the inner nest, a plurality of second water holes are opened on the circumference of the inner nest, and before the push plate pushes the material, all of the second water holes are located above the push plate.

[0027] By adopting the above technical solution, water can pass through the first water hole and the second water hole through the receiving tube and the inner nesting. Before discharging, the sealing plate is first inserted into the sealing space to effectively prevent water from flowing into the inner nesting.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. Agricultural waste contains rich cellulose and hemicellulose. When added to the artificial wetland system as an external carbon source, it can provide the energy required for denitrification and self-reproduction of denitrifying bacteria, and can also serve as a carrier for the growth and reproduction of microorganisms; At the same time, agricultural biomass carbon sources have a slow release rate and a long effective period, which can reduce secondary pollution and water quality fluctuations caused by multiple additions. Therefore, using agricultural waste as an additional carbon source for the artificial wetland system not only makes up for the low concentration of organic matter in the influent and the limited denitrification and denitrification of the system, but also improves the effective utilization rate of agricultural waste; 2. Brick slag has a porous structure, which can provide attachment points for microorganisms and effectively absorb pollutants, increasing the wetland system's ability to absorb pollutants, especially heavy metals, phosphates, and ammonia nitrogen. Oyster shells are rich in calcium carbonate, which can adjust the pH value of water bodies and help absorb phosphorus in water. Brick slag and oyster shells provide a good habitat for wetland microorganisms and increase the diversity of microbial populations; 3. The cover isolates the carbon source from oxygen, preventing direct sunlight from accelerating the drying degree of the carbon source and the influence of temperature on the carbon source; 4. Agricultural waste is usually replaced within 3-6 months to ensure sufficient carbon source for the water body. When replacing agricultural waste, first use the opening component to separate the cover from the storage tube, and then install the sealing component to prevent the discharge component from being soaked in water and damaged during the discharge process. Then start the discharge component to push the agricultural waste out of the storage tube. After collecting the pushed agricultural waste, reset the discharge component and put new agricultural waste into the storage tube. Finally, take out the sealing component and replace the cover to facilitate the replacement of agricultural waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the structure of the discharge assembly and the sealing assembly according to the embodiment of the present application.

[0031] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0032] Figure 4 It is a schematic diagram of the structure of the cover plate and the walking path according to the embodiment of the present application.

[0033] Figure 5 It is a schematic diagram of the structure of the push plate, inner nesting, connecting plate and sealing plate used in the embodiment of the present application.

[0034] Figure 6 It is a schematic diagram of the structure of the linkage member used to reflect the embodiment of the present application.

[0035] Figure 7 It is a schematic diagram of the structure of the second water hole used in the embodiment of the present application.

[0036] Explanation of reference numerals: 11, water inlet catchment area; 111, water inlet pipe; 12, carbon source dosing unit; 121, storage pipe; 1211, first water hole; 1212, pull-out groove; 122, cover plate; 13, ceramsite wetland unit; 14, brick slag wetland unit; 15, zeolite wetland unit; 16, oyster shell wetland unit; 17, water outlet catchment area; 171, water outlet pipe; 18, plant; 181, reed; 182, canna; 183, calamus; 184, iris; 19, partition; 2, water flow assembly; 21, perforated water pipe; 3, opening assembly; 31, walking plank road; 311, sliding groove; 312, baffle; 313, limit plate; 4, discharging assembly; 41, mounting frame; 42, turntable; 43, driving member; 431, driving shaft; 432, motor; 433, first bevel gear; 434, second bevel gear; 44, first connecting rod; 45, connecting member; 451, spur gear; 452, outer gear ring; 453, third bevel gear; 454, fourth bevel gear; 46, second connecting rod; 47, connecting ring; 48, third connecting rod; 49, push plate; 5, sealing assembly; 51, inner nesting; 511, second water hole; 52, connecting plate; 53, sealing plate. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 This application is described in further detail.

[0038] Example 1 The embodiment of the present application discloses a horizontal subsurface flow artificial wetland system to which an agricultural biomass carbon source can be added.

[0039] like Figure 1 The horizontal subsurface artificial wetland system to which agricultural biomass carbon sources can be added comprises an inlet catchment area 11, in which a carbon source adding unit 12 is arranged, the inlet catchment area 11 is connected to a ceramsite wetland unit 13, the ceramsite wetland unit 13 is connected to a brick slag wetland unit 14, the brick slag wetland unit 14 is connected to a zeolite wetland unit 15, the zeolite wetland unit 15 is connected to an oyster shell wetland unit 16, and the oyster shell wetland unit 16 is connected to an outlet catchment area 17; Plants 18 are planted on the ceramsite wetland unit 13, the brick slag wetland unit 14, the zeolite wetland unit 15 and the oyster shell wetland unit 16, and water passing components 2 are arranged between the water inlet catchment area 11 and the ceramsite wetland unit 13, between the ceramsite wetland unit 13 and the brick slag wetland unit 14, between the brick slag wetland unit 14 and the zeolite wetland unit 15, between the zeolite wetland unit 15 and the oyster shell wetland unit 16, and between the oyster shell wetland unit 16 and the water outlet catchment area 17; The carbon source adding unit 12 has agricultural wastes built in, and the water in the water inlet catchment area 11 passes through the carbon source adding unit 12 and the water passing component 2 and then enters the ceramsite type wetland unit 13 .

[0040] The carbon source addition unit 12 includes a plurality of storage tubes 121, which are square tubes and are provided with a plurality of first water holes 1211. The side walls of adjacent storage tubes 121 fit together, and agricultural waste is filled in the storage tubes 121. The top of each storage tube 121 is covered with a cover plate 122, which is a square plate. The sides of adjacent cover plates 122 fit together. The water flow component 2 includes a plurality of perforated water distribution pipes 21, and adjacent perforated water distribution pipes 21 fit together.

[0041] The top elevation of the storage pipe 121 is higher than the top elevations of the expanded clay wetland unit 13, the brick slag wetland unit 14, the zeolite wetland unit 15 and the oyster shell wetland unit 16. The top of the inlet water collection area 11 is connected to the inlet pipe 111. The bottom elevation of the inlet pipe 111 is higher than the top elevations of the expanded clay wetland unit 13, the brick slag wetland unit 14, the zeolite wetland unit 15 and the oyster shell wetland unit 16. The bottom of the outlet water collection area 17 is connected to the outlet pipe 171, and a partition 19 is installed on the top of each perforated water distribution pipe 21.

[0042] Plants 18 include reeds 181, cannas 182, calamus 183 and irises 184. Reeds 181 and cannas 182 are planted on expanded clay type wetland units 13, calamus 183 is planted on brick slag type wetland units 14 and zeolite type wetland units 15, and irises 184 are planted on oyster shell type wetland units 16.

[0043] The particle size of the ceramsite in the ceramsite type wetland unit 13 is 5-10 mm, the particle size of the brick slag in the brick slag type wetland unit 14 is 10-20 mm, the particle size of the zeolite in the zeolite type wetland unit 15 is 8-16 mm, and the particle size of the oyster shell in the oyster shell type wetland unit 16 is 20-30 mm.

[0044] Agricultural waste contains rich cellulose and hemicellulose. When added to the artificial wetland system as an external carbon source, it can provide the energy required for denitrification and self-reproduction of denitrifying bacteria, and can also serve as a carrier for the growth and reproduction of microorganisms. At the same time, agricultural biomass carbon sources have a slow release rate and a long effective period, which can reduce secondary pollution and water quality fluctuations caused by multiple additions. Therefore, using agricultural waste as an additional carbon source for the artificial wetland system not only makes up for the low concentration of organic matter in the influent and the limited denitrification and denitrification of the system, but also improves the effective utilization rate of agricultural waste; In addition, brick slag has a porous structure, which can provide attachment points for microorganisms and effectively absorb pollutants, increasing the wetland system's ability to absorb pollutants, especially heavy metals, phosphates, and ammonia nitrogen. Oyster shells are rich in calcium carbonate, which can adjust the pH value of water bodies and help absorb phosphorus in water. Brick slag and oyster shells provide a good habitat for wetland microorganisms and increase the diversity of microbial populations. The cover plate 122 isolates the carbon source from oxygen, preventing direct sunlight from accelerating the drying degree of the carbon source and the influence of temperature on the carbon source; Reed 181 has strong pollution tolerance and a well-developed root system, which can effectively handle high concentrations of organic matter and pollutants in the incoming water. Its root system can provide more attachment points for denitrifying bacteria and has a strong oxygen transport capacity, which helps to provide initial purification of the water body.

[0045] Canna 182 is not only ornamental, but also has a strong absorption capacity for nutrients such as nitrogen and phosphorus. It is suitable for planting in ceramsite areas where the water quality has been slightly treated to further purify the water quality. Canna 182 has a shallow root system and is suitable for placement in the middle and shallow areas.

[0046] Acorus 183 has strong adaptability and can grow well in areas with more minerals, especially in areas with materials with adsorption capacity such as brick slag or zeolite. These areas are usually areas where plants 183 need to further absorb nitrogen and phosphorus after treating some pollutants.

[0047] Iris 184 is a plant that is very suitable for wetland environments. It has a strong ability to absorb nitrogen and phosphorus in water. Its rhizomes can provide a good living environment for microorganisms on oyster shells, especially at the end of the treatment period, which can help further purify the water. In summary, this scheme maintains sufficient carbon sources in the wetland system and applies agricultural waste to the water treatment wetland system, thereby improving the utilization rate of agricultural waste and improving the water treatment capacity of the wetland system.

[0048] Example 2 Reference Figure 2-Figure 7 The difference between this embodiment and embodiment 1 is that an opening component 3 for opening the cover plate 122 is provided on the water inlet and water collection area 11, a discharging component 4 for pushing agricultural waste out of the storage tube 121 is provided in the storage tube 121, and a sealing component 5 for blocking the first water hole 1211 is provided in the storage tube 121.

[0049] like Figure 2 and Figure 3 The opening assembly 3 includes a walking plank road 31, which is arranged at the top of the water inlet and water collection area 11, and the walking plank road 31 is arranged on the side of the water inlet and water collection area 11 away from the ceramsite type wetland unit 13, the water inlet pipe 111 is located below the walking plank road 31, and a plurality of storage pipes 121 are arranged in parallel with the walking plank road 31, and the storage pipes 121 are located between the walking plank road 31 and the ceramsite type wetland unit 13, and a sliding groove 311 is opened in the walking plank road 31, and the sliding groove 311 passes through the side of the walking plank road 31 facing the cover plate 122, and the sliding groove 311 is close to the cover plate 122. A baffle plate 312 is arranged on the side, the cover plate 122 is connected to the limit plate 313, the cover plate 122 passes through the baffle plate 312 and extends into the sliding groove 311, the limit plate 313 is located in the sliding groove 311, adjacent limit plates 313 fit each other, several limit plates 313 are spliced ​​together and the two limit plates 313 located on the outermost side are respectively abutted against the two inner side walls of the sliding groove 311, when the cover plate 122 is covered on the storage tube 121, the limit plate 313 is abutted against the baffle plate 312, and a plurality of pull-out grooves 1212 are opened on the top surface of each cover plate 122, and the plurality of pull-out grooves 1212 are arranged equidistantly.

[0050] The staff can stand on the walking plank road 31, then grab the pull-out groove 1212 with their hands, and gradually push the cover 122 into the sliding groove 311, so as to separate the cover 122 from the storage tube 121. When the cover 122 needs to be covered again, it is only necessary to grab the pull-out groove 1212 and push the cover 122 out of the sliding groove 311 again until the limit plate 313 abuts against the baffle plate 312, so that the cover 122 is covered on the storage tube 121 again.

[0051] like Figure 5 and Figure 7 The sealing assembly 5 includes an inner nest 51, which is located in the storage tube 121. A sealing space is left between the outer wall of the inner nest 51 and the inner wall of the storage tube 121. The inner nest 51 and the storage tube 121 are connected by two connecting plates 52. The two connecting plates 52 are arranged along the arrangement direction of the storage tube 121, and the sealing space is divided into two and symmetrically arranged about the center line of the connecting plate 52 in the horizontal direction. The agricultural waste and the discharge assembly 4 are both located in the inner nest 51. Before pushing the material, a sealing plate 53 is inserted into the sealing space between the outer wall of the inner nest 51 and the inner wall of the storage tube 121. The sealing plate 53 is adapted to the sealing space, and the inner nest 51 is provided with a plurality of second water holes 511.

[0052] Water can pass through the first water hole 1211 and the second water hole 511 through the receiving tube 121 and the inner nest 51 . Before discharging the material, the blocking plate 53 is first inserted into the blocking space to effectively prevent water from flowing into the inner nest 51 .

[0053] like Figure 4 , Figure 5 and Figure 6 The discharging assembly 4 includes a mounting frame 41, which is located at the bottom of the inner nesting 51. A turntable 42 is rotatably connected to the mounting frame 41, and the turntable 42 is driven by a driving member 43. The mounting frame 41 is hinged with a plurality of first connecting rods 44, each of which is connected to the turntable 42 through a connecting member 45. A plurality of first connecting rods 44 are hinged with a second connecting rod 46, and a plurality of second connecting rods 46 are hinged with a connecting ring 47 at their middle parts. Another second connecting rod 46 is hinged at one end of the plurality of second connecting rods 46 away from the turntable 42, and so on. A plurality of connecting rings 47 are stacked, each connecting ring 47 is connected to a plurality of second connecting rods 46, adjacent second connecting rods 46 are hinged to each other, a plurality of second connecting rods 46 away from the rotating disk 42 are connected to a third connecting rod 48, all the third connecting rods 48 are hinged to a push plate 49, the push plate 49 is in contact with the inner wall of the inner nest 51, when the rotating disk 42 rotates, the driving member 43 drives the first connecting rod 44 to swing, the first connecting rod 44 drives the second connecting rod 46 to swing, the second connecting rod 46 drives the third connecting rod 48 to swing, so that the connecting ring 47 and the push plate 49 are lifted and lowered synchronously; When the first connecting rod 44 swings toward the inner wall of the inner nest 51, the push plate 49 gradually rises and gradually pushes the agricultural waste out of the storage tube 121; When the first connecting rod 44 swings in a direction away from the inner wall of the inner nest 51, the push plate 49 gradually descends.

[0054] The driving member 43 includes a driving shaft 431, which passes through all the storage tubes 121, the connecting plate 52 and the inner nest 51. One end of the driving shaft 431 is connected to a motor 432. A first bevel gear 433 is provided in each storage tube 121. The first bevel gear 433 is coaxially fixed on the driving shaft 431. A second bevel gear 434 is coaxially fixed to the rotating disk 42. The first bevel gear 433 and the second bevel gear 434 are both located in the inner nest 51, and the first bevel gear 433 is meshed with the corresponding second bevel gear 434. The linkage 45 includes a spur gear 451, which is rotatably connected to the mounting frame 41, and the spur gear 451 corresponds to the first connecting rod 44 one by one. The outer gear ring 452 is provided on the circumference of the rotating disk 42, and the spur gear 451 meshes with the outer gear ring 452. The spur gear 451 is coaxially connected with the third bevel gear 453, and the first connecting rod 44 is provided with a fourth bevel gear 454, which meshes with the third bevel gear 453. The central axis of the fourth bevel gear 454 is located on a horizontal plane, and the central axis of the fourth bevel gear 454 does not intersect with the central axis of the rotating disk 42. Before the push plate 49 pushes the material, all the second water holes 511 are located above the push plate 49.

[0055] When discharging, the outer gear ring 452 drives the spur gear 451 and the third bevel gear 453 to rotate synchronously, and the third bevel gear 453 drives the fourth bevel gear 454 to rotate, so that the turntable 42 drives the first connecting rod 44 to swing when rotating, so that the second connecting rod 46 and the third connecting rod 48 swing at the same time to drive the connecting ring 47 and the push plate 49 to push upward synchronously, and the push plate 49 gradually pushes the agricultural waste out of the storage tube 121 until the push plate 49 is located at the mouth of the storage tube 121. At this time, the staff can stand on the walking plank road 31 and the push plate 49 to facilitate the cleaning of agricultural waste; After the agricultural waste is cleaned, the motor 432 drives the turntable 42 to rotate in the opposite direction, so that the first connecting rod 44, the second connecting rod 46 and the third connecting rod 48 swing to a folded state. At this time, the connecting ring 47 and the push plate 49 are re-located to the bottom of the storage tube 121, making it convenient for the staff to add new agricultural waste into the storage tube 121.

[0056] The implementation principle of Example 2 is as follows: agricultural waste is usually replaced within 3-6 months to ensure that sufficient carbon source is provided for the water body. When replacing agricultural waste, first use the opening component 3 to separate the cover 122 from the storage tube 121, and then install the sealing component 5 to prevent the discharge component 4 from being soaked in water and damaged during the discharge process. Then start the discharge component 4 to push the agricultural waste out of the storage tube 121. After collecting the pushed agricultural waste, reset the discharge component 4, put new agricultural waste into the storage tube 121, and finally take out the sealing component 5 and re-cover the cover 122 to facilitate the replacement of agricultural waste.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source, characterized in that: The invention comprises an inlet water collection area (11), wherein a carbon source addition unit (12) is arranged in the inlet water collection area (11), the inlet water collection area (11) is connected to a ceramsite-type wetland unit (13), the ceramsite-type wetland unit (13) is connected to a brick slag-type wetland unit (14), the brick slag-type wetland unit (14) is connected to a zeolite-type wetland unit (15), the zeolite-type wetland unit (15) is connected to an oyster shell-type wetland unit (16), the oyster shell-type wetland unit (16) is connected to an outlet water collection area (17), and the ceramsite-type wetland unit (13), the brick slag-type wetland unit (14), the zeolite-type wetland unit (15) and the oyster shell-type wetland unit (16) are all planted with plants. (18) A water-passing component (2) is provided between the water inlet catchment area (11) and the ceramsite-type wetland unit (13), between the ceramsite-type wetland unit (13) and the brick slag-type wetland unit (14), between the brick slag-type wetland unit (14) and the zeolite-type wetland unit (15), between the zeolite-type wetland unit (15) and the oyster shell-type wetland unit (16), and between the oyster shell-type wetland unit (16) and the water outlet catchment area (17). The carbon source addition unit (12) has agricultural waste built in. The water in the water inlet catchment area (11) passes through the carbon source addition unit (12) and the water-passing component (2) and then enters the ceramsite-type wetland unit (13).

2. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 1, characterized in that: The carbon source dosing unit (12) comprises a plurality of storage tubes (121), wherein the storage tubes (121) are used to contain agricultural waste, and a plurality of first water holes (1211) are provided on the storage tubes (121).

3. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 2, characterized in that: Each of the storage tubes (121) is covered with a cover plate (122); the storage tubes (121) are square tubes; adjacent storage tubes (121) are spliced ​​together; and adjacent cover plates (122) are spliced ​​together.

4. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 1, characterized in that: The particle size of the ceramsite in the ceramsite-type wetland unit (13) is 5-10 mm, the particle size of the brick slag in the brick slag-type wetland unit (14) is 10-20 mm, the particle size of the zeolite in the zeolite-type wetland unit (15) is 8-16 mm, and the particle size of the oyster shell in the oyster shell-type wetland unit (16) is 20-30 mm; the water flow component (2) is a plurality of perforated water distribution pipes (21), and the plurality of perforated water distribution pipes (21) are arranged in an array.

5. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 1, characterized in that: The plants (18) include reeds (181), cannas (182), calamus (183) and irises (184); the reeds (181) and cannas (182) are planted on the expanded clay type wetland unit (13); the calamus (183) is planted on the slag type wetland unit (14) and the zeolite type wetland unit (15); and the irises (184) are planted on the oyster shell type wetland unit (16).

6. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 3, characterized in that: An opening component (3) for opening the cover plate (122) is provided on the water inlet and water collection area (11), a discharging component (4) for pushing agricultural waste out of the storage tube (121) is provided in the storage tube (121), and a sealing component (5) for blocking the first water hole (1211) is provided in the storage tube (121).

7. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 6, characterized in that: The opening assembly (3) comprises a walking plank road (31), the walking plank road (31) being arranged at the top of the water inlet and water collection area (11), a sliding groove (311) being provided in the walking plank road (31), the sliding groove (311) being connected to a side of the walking plank road (31) facing the cover plate (122), a baffle (312) being provided on a side of the sliding groove (311) close to the cover plate (122), and the cover plate ( The cover plate (122) is connected with a limit plate (313), the cover plate (122) passes through the baffle plate (312) and extends into the sliding groove (311), the limit plate (313) is located in the sliding groove (311), when the cover plate (122) is covered on the storage tube (121), the limit plate (313) abuts against the baffle plate (312), and each of the cover plates (122) is provided with a plurality of pull-out grooves (1212).

8. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 6, characterized in that: The discharging assembly (4) comprises a mounting frame (41), a turntable (42) is rotatably connected to the mounting frame (41), the turntable (42) is driven by a driving member (43), the mounting frame (41) is hinged with a plurality of first connecting rods (44), each of the first connecting rods (44) is connected to the turntable (42) by a connecting member (45), a plurality of the first connecting rods (44) are hinged with a second connecting rod (46), a connecting ring (47) is hinged at the middle of a plurality of the second connecting rods (46), and a plurality of the second connecting rods (46) are away from the second connecting rod (43). 6), and another second connecting rod (46) is hinged at one end thereof. Similarly, a plurality of connecting rings (47) are stacked above the mounting frame (41), each of the connecting rings (47) is connected to a plurality of the second connecting rods (46), and adjacent second connecting rods (46) are hinged to each other. A plurality of the second connecting rods (46) away from the rotating disk (42) are connected to a third connecting rod (48), and all the third connecting rods (48) are hinged to a push plate (49) together. When the rotating disk (42) rotates, the driving member (43) drives the first connecting rod (44) to swing.

9. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 8, characterized in that: The driving member (43) comprises a driving shaft (431), the driving shaft (431) passes through all the storage tubes (121), one end of the driving shaft (431) is connected to a motor (432), each of the storage tubes (121) is provided with a first bevel gear (433), the first bevel gear (433) is coaxially fixed on the driving shaft (431), the rotating disk (42) is coaxially fixed with a second bevel gear (434), and the first bevel gear (433) is meshed with the corresponding second bevel gear (434); The linkage (45) comprises a spur gear (451), the spur gear (451) is rotatably connected to the mounting frame (41), the spur gear (451) corresponds to the first connecting rod (44) one by one, an outer gear ring (452) is arranged on the circumference of the rotating disk (42), the spur gear (451) meshes with the outer gear ring (452), the spur gear (451) is coaxially connected with a third bevel gear (453), a fourth bevel gear (454) is arranged on the first connecting rod (44), and the fourth bevel gear (454) meshes with the third bevel gear (453).

10. The horizontal subsurface flow artificial wetland system capable of adding agricultural biomass carbon source according to claim 9, characterized in that: The sealing assembly (5) comprises an inner nest (51), the inner nest (51) is located in the storage tube (121), a sealing space is left between the outer wall of the inner nest (51) and the inner wall of the storage tube (121), the inner nest (51) and the storage tube (121) are connected via a connecting plate (52), the driving shaft (431) passes through the storage tube (121), the connecting plate (52) and the inner nest (51), agricultural waste, the safety The mounting frame (41) and the push plate (49) are both located in the inner nest (51); a blocking plate (53) is inserted into the blocking space between the outer wall of the inner nest (51) and the inner wall of the storage tube (121); the push plate (49) is adapted to the inner nest (51); a plurality of second water holes (511) are opened on the circumference of the inner nest (51); and before the push plate (49) pushes the material, all of the second water holes (511) are located above the push plate (49).

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