Wetland purification device with efficient regulation, storage and purification functions

Abstract

The utility model discloses a wetland purification device with efficient regulation, storage and purification functions. Comprising a water inlet channel, a facultative oxidation pond for performing oxidation pretreatment on runoff sewage, a transverse flow filtration wetland for performing transverse overflowing on the runoff sewage, a longitudinal flow filtration wetland for performing longitudinal filtration on the runoff sewage and an ecological lake for storing and purifying the filtered runoff sewage, one end of the water inlet channel is communicated to the runoff river and the other end is communicated to a water inlet of the facultative oxidation pond; one end of the transverse flow filtering wetland is communicated to a water outlet of the facultative oxidation pond, and the other end of the transverse flow filtering wetland is communicated to a water inlet of the longitudinal flow filtering wetland; a water outlet of the longitudinal flow filtering wetland is communicated with the ecological lake; an aeration device for adjusting the aeration intensity and the aeration time of the facultative oxidation pond is arranged in the facultative oxidation pond. The wetland purification device with the efficient regulation, storage and purification functions can coordinate and reduce the influence of urban rainwater on the whole sewer channel of the city while treating the urban runoff pollution.

Description

Technical Field

[0001] The utility model relates to a wetland purification device with high-efficiency regulating, storing and purifying functions. Background Art

[0002] At present, if urban runoff pollution is not handled properly, it will cause serious pollution to the water environment. At present, the runoff pollution treatment technologies are mainly divided into the following types: ① Sedimentation tanks and grit chambers: by extending the residence time, the suspended matter is allowed to settle to the bottom, thereby purifying the runoff; ② Biofilters: using microorganisms and plants to degrade organic pollutants and reduce the content of nutrients such as nitrogen and phosphorus; ③ Rain gardens and wetland treatment systems: through the combination of vegetation and soil, biological and physical processes are used to remove pollutants; ④ Separation reservoirs: by separating pollutants and runoff, the input of pollutants is reduced; ⑤ Membrane filtration and adsorption: using membrane filtration and adsorption materials to remove pollutants.

[0003] In addition to treating runoff pollution caused by initial rainwater in cities and towns, the actual runoff water treatment system also needs to treat waterlogging caused by long-term rainfall and pressure on river flood discharge. Among the above-mentioned prior arts, the existing runoff pollution treatment technology lacks the function of rainwater storage, and the existing rainwater storage tank lacks the ability to treat runoff pollution. Utility Model Content

[0004] The utility model provides a wetland purification device with high-efficiency regulation and purification functions to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0005] A wetland purification device with high-efficiency regulation, storage and purification functions, comprising: an inlet channel for runoff sewage to enter, a facultative oxidation pond for oxidative pretreatment of the runoff sewage, a cross-flow filtering wetland for horizontal flow of the runoff sewage, a longitudinal flow filtering wetland for longitudinal filtering of the runoff sewage and an ecological lake for storing and purifying the filtered runoff sewage; one end of the inlet channel is connected to the runoff river and the other end is connected to the water inlet of the facultative oxidation pond; one end of the cross-flow filtering wetland is connected to the water outlet of the facultative oxidation pond and the other end is connected to the water inlet of the longitudinal flow filtering wetland; the water outlet of the longitudinal flow filtering wetland is connected to the ecological lake; an aeration device for adjusting the aeration intensity and aeration time of the facultative oxidation pond is provided in the facultative oxidation pond; the cross-flow filtering wetland is provided in sequence in its horizontal extension direction: a water inlet layer connected to the water inlet of the cross-flow filtering wetland, a first coarse gravel layer connected to the water inlet layer for first layer filtration, a first coarse gravel layer connected to the first coarse gravel layer for second layer filtration The vertical filtering wetland comprises a first fine gravel layer for layer filtration, a quartz sand layer connected to the first fine gravel layer for the third layer filtration, a biological particle filler layer connected to the quartz sand layer for the fourth layer of biological decomposition filtration, a composite slow-release carbon source filler layer connected to the biological particle filler layer for the fifth layer of fine adsorption filtration, and an outlet layer connected to the composite slow-release carbon source filler layer and the outlet of the cross-flow filtration wetland; the longitudinal flow filtration wetland is provided with, from bottom to top in the vertical direction: a second fine gravel layer for fine filtration of runoff sewage, a biological filler layer for biological decomposition filtration of runoff sewage, a second coarse gravel layer for coarse filtration of runoff sewage, a soil layer for filtering pre-treatment of runoff sewage and a vegetation layer of filtering material for biological absorption of runoff sewage; the vegetation layer is provided with an inlet for introducing runoff sewage; the inlet is connected to the outlet of the cross-flow filtration wetland; the second fine gravel layer is provided with an outlet for outputting purified runoff sewage; the outlet is connected to the ecological lake.

[0006] Furthermore, the facultative oxidation pond is in the shape of a fish with a fish head and a fish tail; the water inlet of the facultative oxidation pond is arranged at the fish head shape; the water outlet of the facultative oxidation pond is arranged at the fish tail shape; a plurality of drainage channels for guiding runoff sewage to flow to both sides of the facultative oxidation pond are arranged at intervals between the fish head shape and the fish tail shape on the center line of the facultative oxidation pond; the lengths of the plurality of drainage channels increase successively from the water inlet of the facultative oxidation pond to the water outlet of the facultative oxidation pond; a reflux channel for connecting the water outlet of the facultative oxidation pond is arranged on the center line of the facultative oxidation pond.

[0007] Furthermore, mud collection pits for collecting mud and sand in runoff sewage are arranged on both sides of the fishtail shape.

[0008] Furthermore, the water inlet of the cross-flow filtration wetland is connected to the upper end of the water inlet layer; the water inlet layer is connected to the lower end of the first coarse gravel layer through the drainage baffle; the first coarse gravel layer is connected to the upper end of the first fine gravel layer through the drainage baffle; the first fine gravel layer is connected to the lower end of the quartz sand layer through the drainage baffle; the quartz sand layer is connected to the upper end of the biological particle filler layer through the drainage baffle; the biological particle filler layer is connected to the lower end of the composite slow-release carbon source filler layer through the drainage baffle; the composite slow-release carbon source filler layer is connected to the upper end of the water outlet layer through the drainage baffle; the water outlet of the cross-flow filtration wetland is connected to the upper end of the water outlet layer.

[0009] Furthermore, the cross-flow filtration wetland is in the form of an intestinal tract with a plurality of continuous bends; the water inlet of the cross-flow filtration wetland is an inlet weir capable of regulating the water inlet flow rate; and the water outlet of the cross-flow filtration wetland is an overflow weir capable of settling overflow.

[0010] Furthermore, the longitudinal flow filtering wetland is provided with a main pipe for introducing runoff sewage on its center line; one end of the main pipe is connected to the outlet of the cross-flow filtering wetland; the main pipe is provided with a plurality of parallel branch pipes for diverting the runoff sewage at intervals in its extension direction; the branch pipes are provided with outlet holes for evenly distributing the runoff sewage on the vegetation layer at intervals in its extension direction.

[0011] Furthermore, the pool body of the longitudinal flow filtration wetland is a square concrete pool body.

[0012] Furthermore, the vegetation layer of the longitudinal flow filtration wetland adopts a mixed planting of canna, zetai, cattail, umbrella, ginger flower, red water hyacinth and sedge.

[0013] Furthermore, the ecological lake is provided with an emergent vegetation layer consisting of reeds, cattails, water chestnuts, lotus, water celery, wild rice stem, lotus and cattail.

[0014] Furthermore, the ecological lake is provided with a return pipe; the return pipe is connected to the water inlet of the cross-flow filtration wetland; the return pipe is provided with a water pump for pumping water in the ecological lake into the water inlet of the cross-flow filtration wetland.

[0015] The utility model is beneficial in that the provided wetland purification device with efficient regulation, storage and purification function can not only efficiently treat and purify runoff sewage, but also effectively regulate and store rainwater. While controlling urban pollution, it can also coordinate and reduce the impact of urban rainwater on the overall urban sewage channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of a wetland purification device with high-efficiency regulating and purifying functions of the utility model;

[0018] Figure 2 yes Figure 1 Schematic diagram of a facultative oxidation pond of a wetland purification device with high-efficiency storage and purification functions;

[0019] Figure 3 yes Figure 1 A schematic plan view of a cross-flow filtration wetland of a wetland purification device with high-efficiency storage and purification functions;

[0020] Figure 4 yes Figure 3 A cross-sectional view of a cross-flow filtration wetland of a wetland purification device with high-efficiency storage and purification functions;

[0021] Figure 5 yes Figure 1 A schematic plan view of a longitudinal flow filtration wetland of a wetland purification device with high efficiency storage and purification functions;

[0022] Figure 6 yes Figure 5 A cross-sectional view of a longitudinal flow filtration wetland of a wetland purification device with high efficiency storage and purification functions;

[0023] A wetland purification device 10 with high-efficiency regulation and purification functions, an inlet channel 11, a facultative oxidation pond 12, an aeration device (not shown), a diversion channel 121, a return channel 122, a mud collection pit 123, a cross-flow filtration wetland 13, an inlet layer 131, a first coarse gravel layer 132, a first fine gravel layer 133, a quartz sand layer 134, a biological particle filler layer 135, a composite slow-release carbon source filler layer 136, and a water outlet layer 137. Inlet weir 138, overflow weir 139, drainage baffle 140, longitudinal flow filtration wetland 14, second fine gravel layer 141, biological filler layer 142, second coarse gravel layer 143, soil layer 144, vegetation layer 145, inlet end 146, outlet end 147, main pipe 148, branch pipe 149, outlet hole 1491, ecological lake 15, emergent vegetation layer 151, return pipe (not shown), water pump (not shown). DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0025] like Figures 1 to 6 As shown, a wetland purification device 10 with high-efficiency regulation and purification functions of the present application includes: an inlet channel 11, a facultative oxidation pond 12, a cross-flow filtration wetland 13, a longitudinal flow filtration wetland 14 and an ecological lake 15, wherein: the inlet channel 11 is used to introduce runoff sewage, the facultative oxidation pond 12 is used to pre-oxidize the runoff sewage, the cross-flow filtration wetland 13 is used to horizontally flow the runoff sewage, the longitudinal flow filtration wetland 14 is used to vertically filter the runoff sewage, and the ecological lake 15 is used to store and purify the filtered runoff sewage. During installation, one end of the water inlet channel 11 is connected to the runoff river and the other end is connected to the water inlet of the facultative oxidation pond 12, one end of the cross-flow filter wetland 13 is connected to the water outlet of the facultative oxidation pond 12 and the other end is connected to the water inlet of the longitudinal filter wetland 14, and the water outlet of the longitudinal filter wetland 14 is connected to the ecological lake 15, so that the runoff sewage is introduced into the water inlet channel 11, the facultative oxidation pond 12, the cross-flow filter wetland 13, the longitudinal filter wetland 14 and the ecological lake 15 at one time, so that efficient purification and filtration can be achieved. As a specific plan:

[0026] An aeration device is provided in the facultative oxidation pond 12 for adjusting the aeration intensity and aeration time of the facultative oxidation pond 12, thereby increasing the oxidation rate of runoff sewage in the facultative oxidation pond 12 and promoting oxidative decomposition.

[0027] The cross-flow filtration wetland 13 is provided with: an inlet layer 131, a first coarse gravel layer 132, a first fine gravel layer 133, a quartz sand layer 134, a biological particle filler layer 135, a composite slow-release carbon source filler layer 136 and a water outlet layer 137 in the horizontal extension direction. The inlet layer 131 is connected to the water inlet of the cross-flow filtration wetland 13 to introduce runoff sewage, the first coarse gravel layer 132 is connected to the inlet layer 131 for the first layer of filtration of the runoff sewage, and the first fine gravel layer 133 is connected to the first coarse gravel layer 132 for filtering the runoff sewage. The runoff sewage is subjected to a second layer of filtration, the quartz sand layer 134 is connected to the first fine gravel layer 133 for the third layer of filtration of the runoff sewage, the biological particle filler layer 135 is connected to the quartz sand layer 134 for the fourth layer of biological decomposition filtration of the runoff sewage, the composite slow-release carbon source filler layer 136 is connected to the biological particle filler layer 135 for the fifth layer of fine adsorption filtration of the runoff sewage, and the outlet water layer 137 is connected to the composite slow-release carbon source filler layer 136 and the outlet of the cross-flow filtration wetland 13 to precipitate and output the runoff sewage.

[0028] The longitudinal flow filtering wetland 14 is provided with the following from bottom to top in the vertical direction: the second fine gravel layer 141, the biological filler layer 142, the second coarse gravel layer 143, the soil layer 144 and the vegetation layer 145. The filtering principle from top to bottom is: the vegetation layer 145 is used for biological absorption of the filtering material of the runoff sewage, the soil layer 144 is used for filtering and pre-treating the runoff sewage absorbed and filtered by the vegetation layer 145, the second coarse gravel layer 143 is used for coarse filtration of the runoff sewage, the biological filler layer 142 is used for biological decomposition and filtration of the runoff sewage, and the second fine gravel layer 141 is used for fine filtration of the runoff sewage. The vegetation layer 145 is provided with an inlet end 146, which is connected to the outlet of the cross-flow filtering wetland 13 for the introduction of runoff sewage. The second fine gravel layer 141 is provided with an outlet end 147, which is connected to the ecological lake 15 for outputting the purified runoff sewage to the ecological lake 15 for storage and use.

[0029] When the wetland purification device 10 with high-efficiency regulation and purification function is actually used, the polluted water body of the source runoff, that is, the runoff sewage, enters the facultative oxidation pond 12, the cross-flow filtering wetland 13, the longitudinal flow filtering wetland 14 in sequence through the water inlet channel 11, and finally enters the ecological lake 15. First, the runoff sewage enters the facultative oxidation pond 12 from the water inlet channel 11. In the facultative oxidation pond 12, the aeration device controls the aeration amount and aeration time according to the dissolved oxygen concentration in the influent. The effluent of the facultative oxidation pond 12 enters the cross-flow filtering wetland 13. The hydraulic retention time in the cross-flow filtering wetland 13 is 0.5-1.0d, and the surface load is 0.2-0.4m 3 / m 2 .h, the design flow velocity is 0.6~1.0m / s. The effluent from the cross-flow filter wetland 13 enters the longitudinal filter wetland 14, the hydraulic retention time in the longitudinal filter wetland 14 is 0.3~1.5d, and the surface load is 0.3~0.6m 3 / m 2 .h, the water flow velocity is designed to be 0.2-0.6 m / s, and the planting density of the vegetation layer 145 is 10-20 plants / m 2 The effluent from the longitudinal flow filtering wetland 14 enters the ecological lake 15 for storage and can be used for landscape use, etc.

[0030] Furthermore, the ecological lake 15 is provided with a return pipe, which is connected to the water inlet of the cross-flow filter wetland 13. The return pipe is provided with a water pump for pumping the water in the ecological lake 15 into the water inlet of the cross-flow filter wetland 13. In this way, if the water quality in the ecological lake 15 does not meet the requirements of landscape water use, the water pump can be turned on to lift the water in the ecological lake 15 to the water inlet of the cross-flow filter wetland 13, so as to recirculate the water until it meets the water quality requirements.

[0031] The wetland purification device 10 with efficient regulation and purification function can not only efficiently purify the sewage of urban runoff by setting the facultative oxidation pond 12, the cross-flow filtering wetland 13, the longitudinal flow filtering wetland 14 and the ecological lake 15, but also the urban rainwater can be collected through the pipeline and flow into the device for efficient regulation and filtering. In other words, the wetland purification device 10 with efficient regulation and purification function can filter and treat the runoff pollution efficiently, stably, safely and controllably, and can also effectively regulate and store rainwater. While treating the urban runoff pollution, the water storage of the ecological lake 15 can also coordinate and reduce the impact of urban rainwater on the overall urban sewer channel.

[0032] As a specific implementation method, the facultative oxidation pond 12 is in the shape of a fish head and a fish tail. The water inlet of the facultative oxidation pond 12 is arranged at the fish head shape, and the water outlet of the facultative oxidation pond 12 is arranged at the fish tail shape. A plurality of drainage channels 121 are arranged between the fish head shape and the fish tail shape on the center line of the facultative oxidation pond 12 to guide the runoff sewage to flow to both sides of the facultative oxidation pond 12. The lengths of the plurality of drainage channels 121 increase successively from the water inlet of the facultative oxidation pond 12 to the water outlet of the facultative oxidation pond 12. A reflux channel 122 is arranged on the center line of the facultative oxidation pond 12 to connect the water outlet of the facultative oxidation pond 12, so as to output the pretreated runoff sewage. Through such a structure, the runoff sewage entering the facultative oxidation pond 12 flows to both sides, and then flows back to the middle into the reflux channel 122 after sedimentation and oxidation treatment, and finally discharged from the outlet of the facultative oxidation pond 12, which can improve the treatment efficiency and quality of the incoming runoff sewage.

[0033] Furthermore, mud pits 123 are provided on both sides of the fishtail shape to collect the silt in the runoff sewage. When the runoff sewage flows, the silt deposited therein also enters the mud pits 123 under the action of scouring, which facilitates the cleaning of the deposited silt.

[0034] As a specific implementation manner, the water inlet of the cross-flow filtration wetland 13 is connected to the upper end of the water inlet layer 131, the water inlet layer 131 is connected to the lower end of the first coarse gravel layer 132 through the drainage baffle 140, the first coarse gravel layer 132 is connected to the upper end of the first fine gravel layer 133 through the drainage baffle 140, the first fine gravel layer 133 is connected to the lower end of the quartz sand layer 134 through the drainage baffle 140, the quartz sand layer 134 is connected to the upper end of the biological particle filler layer 135 through the drainage baffle 140, the biological particle filler layer 135 is connected to the lower end of the composite slow-release carbon source filler layer 136 through the drainage baffle 140, the composite slow-release carbon source filler layer 136 is connected to the upper end of the water outlet layer 137 through the drainage baffle 140, and the water outlet of the cross-flow filtration wetland 13 is connected to the upper end of the water outlet layer 137. Through such a design, the runoff sewage can be drained and filtered upward and downward to improve the filtering effect.

[0035] As a specific implementation, the cross-flow filter wetland 13 is in an intestinal shape with multiple continuous bends, the water inlet of the cross-flow filter wetland 13 is an inlet weir 138 capable of adjusting the water inlet flow rate, and the water outlet of the cross-flow filter wetland 13 is an overflow weir 139 capable of sedimentation overflow. In this way, the filtration stroke can be increased within a limited space, the filtration efficiency can be improved, and the filtration flow rate can be effectively controlled by the inlet weir 138 according to the specific sewage situation, thereby improving the filtration quality.

[0036] As a specific implementation method, the longitudinal flow filtering wetland 14 is provided with a main pipe 148 on its center line, one end of the main pipe 148 is connected to the outlet of the cross-flow filtering wetland 13 for introducing runoff sewage, the main pipe 148 is provided with a plurality of branch pipes 149 at intervals in its extension direction, the plurality of branch pipes 149 are distributed in parallel for diverting the runoff sewage, and the branch pipes 149 are provided with outlet holes 1491 at intervals in its extension direction. Through such a structural design, the runoff sewage can be evenly distributed on the vegetation layer 145, thereby improving the uniformity of the longitudinal filtration.

[0037] As a specific implementation, the pool body of the longitudinal flow filtration wetland 14 is a square concrete pool body, so as to avoid water leakage.

[0038] As a specific implementation, the vegetation layer 145 of the longitudinal flow filtering wetland 14 adopts a vegetation layer 145 planted by a mixture of canna, zetai, cattail, umbrella, ginger flower, red water hyacinth and sedge, which has a better filtering effect on the water body.

[0039] As a specific implementation, an emergent vegetation layer 151 is provided in the ecological lake 15. The emergent vegetation layer 151 is composed of reeds, cattails, water chestnuts, lotus, water celery, wild rice stem, lotus, and cattail, which can further purify the water.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A wetland purification device with high-efficiency storage and purification functions, characterized in that: include: Inlet channels for runoff sewage, facultative oxidation ponds for oxidation pretreatment of runoff sewage, cross-flow filtration wetlands for lateral flow of runoff sewage, longitudinal filtration wetlands for longitudinal filtration of runoff sewage, and ecological lakes for storing and purifying filtered runoff sewage; One end of the water inlet channel is connected to the runoff river and the other end is connected to the water inlet of the facultative oxidation pond; One end of the cross-flow filtration wetland is connected to the water outlet of the facultative oxidation pond and the other end is connected to the water inlet of the longitudinal flow filtration wetland; The water outlet of the longitudinal flow filtering wetland is connected to the ecological lake; The facultative oxidation pond is provided with an aeration device for adjusting the aeration intensity and aeration time of the facultative oxidation pond; The cross-flow filtration wetland is provided with, in its horizontal extension direction, an inlet layer connected to the water inlet of the cross-flow filtration wetland, a first coarse gravel layer connected to the inlet layer for first-layer filtration, a first fine gravel layer connected to the first coarse gravel layer for second-layer filtration, a quartz sand layer connected to the first fine gravel layer for third-layer filtration, a biological particle filler layer connected to the quartz sand layer for fourth-layer biological decomposition filtration, a composite slow-release carbon source filler layer connected to the biological particle filler layer for fifth-layer fine adsorption filtration, and an outlet layer connected to the composite slow-release carbon source filler layer and the water outlet of the cross-flow filtration wetland; The longitudinal flow filtering wetland is provided with: a second fine gravel layer for fine filtering of runoff sewage, a biological filler layer for biological decomposition and filtration of runoff sewage, a second coarse gravel layer for coarse filtering of runoff sewage, a soil layer for filtering and pre-treating runoff sewage, and a vegetation layer for biological absorption of filtering materials of runoff sewage in sequence from bottom to top in the vertical direction; The vegetation layer is provided with a water inlet for introducing runoff sewage; The water inlet is connected to the water outlet of the cross-flow filtration wetland; The second fine gravel layer is provided with a water outlet for outputting the purified runoff sewage; The water outlet is connected to the ecological lake.

2. The wetland purification device with high-efficiency storage and purification function according to claim 1 is characterized in that: The water inlet of the cross-flow filtration wetland is connected to the upper end of the water inlet layer; The water inlet layer is connected to the lower end of the first coarse gravel layer through a drainage baffle; The first coarse gravel layer is connected to the upper end of the first fine gravel layer through a drainage baffle; The first fine gravel layer is connected to the lower end of the quartz sand layer through a drainage baffle; The quartz sand layer is connected to the upper end of the biological particle filler layer through a drainage baffle; The biological particle filler layer is connected to the lower end of the composite slow-release carbon source filler layer through a drainage partition; The composite slow-release carbon source filler layer is connected to the upper end of the water-yielding layer through a drainage partition; The water outlet of the cross-flow filtration wetland is connected to the upper end of the water outlet layer.

3. The wetland purification device with high-efficiency storage and purification function according to claim 1 is characterized in that: The cross-flow filtration wetland is in the form of an intestinal tract with a plurality of continuous bends; The water inlet of the cross-flow filtering wetland is an inlet weir capable of regulating the water inlet flow rate; the water outlet of the cross-flow filtering wetland is an overflow weir capable of settling overflow.

4. The wetland purification device with high-efficiency storage and purification function according to claim 1 is characterized in that: The longitudinal flow filtration wetland is provided with a main pipe for introducing runoff sewage on its center line; One end of the main pipe is connected to the water outlet of the cross-flow filtration wetland; The main pipe is provided with a plurality of parallel branch pipes for diverting runoff sewage at intervals in its extending direction; The branch pipes are provided with water outlet holes spaced apart in the extending direction thereof for evenly distributing the runoff sewage on the vegetation layer.

5. The wetland purification device with high-efficiency storage and purification function according to claim 1 is characterized in that: The pool body of the longitudinal flow filtration wetland is a square concrete pool body.

6. The wetland purification device with high-efficiency regulating and purifying function according to claim 1 is characterized in that: The vegetation layer of the longitudinal flow filtration wetland is a mixed planting of canna, zetai, cattail, umbrella, ginger flower, red water hyacinth and sedge.

7. The wetland purification device with high-efficiency storage and purification function according to claim 1 is characterized in that: The ecological lake is provided with an emergent vegetation layer consisting of reeds, cattails, water chestnuts, lotus, water celery, wild rice stem, lotus and cattail.

8. The wetland purification device with high-efficiency regulating and purifying function according to claim 1 is characterized in that: The ecological lake is provided with a return pipe; The return pipe is connected to the water inlet of the cross-flow filtration wetland; The reflux pipe is provided with a water pump for pumping the water in the ecological lake into the water inlet of the cross-flow filtering wetland.

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