Three-dimensional constructed wetland device

Abstract

The invention discloses a three-dimensional constructed wetland device which comprises a plurality of groups of constructed wetland modules arranged in the vertical direction, each group of constructed wetland module comprises two constructed wetland boxes, namely a first constructed wetland box and a second constructed wetland box, and the first constructed wetland box and the second constructed wetland box are distributed in a stepped manner; the first artificial wetland box is higher than the second artificial wetland box; each of the first artificial wetland box and the second artificial wetland box comprises an outer frame and a filler frame body; the filler frame bodies in the first artificial wetland box and the second artificial wetland box are obliquely arranged in the corresponding outer frames in opposite directions; and each group of constructed wetland modules comprises two constructed wetland boxes which are arranged in a stepped manner at high and low positions, and the two constructed wetland boxes are matched with the inlet, the outlet and the filler frame body, so that the underflow filtration of the constructed wetland modules is realized, and meanwhile, the water flow of the surface flow can be guided to flow out of the second constructed wetland box from the first constructed wetland box in an S-shaped flowing manner.

Description

Technical Field

[0001] The invention relates to the technical field of artificial wetlands, and in particular to a three-dimensional artificial wetland device. Background Art

[0002] Artificial wetlands have the advantages of good sewage purification effect, low operating cost, and landscape effect. Therefore, artificial wetlands are widely promoted and used for the treatment of polluted water bodies, especially in the purification of polluted surface water or low-pollution water.

[0003] Since the problem with conventional artificial wetlands is that they occupy a large area and have a low utilization rate, the prior art uses a three-dimensional setting. For example, Chinese patent application number 202321400268.5 discloses a space-saving wetland system, including a support frame and one or more wetland system units, each of which includes several layers of artificial wetland modules arranged at intervals along the longitudinal direction of the support frame, and each artificial wetland module includes a filler frame and a filler filled in the filler frame. By arranging more than one wetland system unit in the form of an array distributed on a horizontal plane, the space utilization rate of each layer is improved, thereby improving the utilization rate of the entire longitudinal space. However, on the one hand, it is necessary to separately and alternately arrange surface flow artificial wetland units and subsurface flow artificial wetland units, which increases the three-dimensional occupied space. On the other hand, when water accumulates in a single artificial wetland unit due to blockage or accumulation of impurities, water flow cannot be quickly transferred and released, which reduces the efficiency of the entire device. Therefore, a three-dimensional artificial wetland device is urgently needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a three-dimensional artificial wetland device, which can effectively solve the problems existing in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a three-dimensional artificial wetland device, comprising a plurality of groups of artificial wetland modules arranged in a vertical direction, each group of the artificial wetland modules comprising two artificial wetland boxes, which are set as a first artificial wetland box and a second artificial wetland box, the first artificial wetland box and the second artificial wetland box are distributed in a stepped manner, and the first artificial wetland box is higher than the second artificial wetland box; the first artificial wetland box and the second artificial wetland box both comprise an outer frame and a filling frame body, and the filling frames in the first artificial wetland box and the second artificial wetland box are arranged in the corresponding outer frame in an inclined manner in opposite directions; and

[0006] The outer frame in the first artificial wetland box is provided with a first inlet and a first outlet, the first inlet corresponds to the corresponding high point of the packing frame and is configured to guide the water flow to the high point of the packing frame; the first outlet corresponds to the corresponding low point of the packing frame and is configured to receive the water flow flowing out from the low point of the packing frame;

[0007] The outer frame of the second artificial wetland box is provided with a second inlet and a second outlet, the second inlet corresponds to the corresponding high point of the filling frame and is connected to the first outlet through a pipeline, and the second outlet corresponds to the corresponding low point of the filling frame and is used to guide the water flow to flow out and fall to the first inlet of the corresponding first artificial wetland box below;

[0008] The first artificial wetland box and the second artificial wetland box also include a third outlet, which is arranged at the bottom of the first artificial wetland box and the first artificial wetland box and close to the corresponding low point of the filling frame. The third outlet is configured to lead out water seeping from the first artificial wetland box and the second artificial wetland box.

[0009] Preferably, the second artificial wetland box in the artificial wetland module of the upper layer is located above the first artificial wetland box in the artificial wetland module of the lower layer, and the first inlet of the first artificial wetland box of the lower layer is located below the second outlet of the second artificial wetland box of the upper layer and is used to receive the water flow falling from the second outlet.

[0010] Preferably, a slot is provided in at least the first inlet of the first artificial wetland box of the second stage in a vertical downward direction, and the slot is used to store a fixed amount of water flow.

[0011] Preferably, the outer frame of the first artificial wetland box is provided with a first inlet and a first outlet at both ends of the inclined filling frame; the outer frame of the second artificial wetland box is provided with a second inlet and a second outlet at both ends of the inclined filling frame; and

[0012] The bottom of the filling frames in the first artificial wetland box and the second artificial wetland box are both provided with adjustment mechanisms, which are configured to switch the tilting direction of the filling frames regularly or as needed, and the corresponding outlet is sealed on one side of the upper side of the filling frames.

[0013] Preferably, the adjustment mechanism comprises:

[0014] The central axis is located at the center position below the packing frame. The central axis rotates or the packing frame rotates around the central axis to adjust the tilt direction of the packing frame.

[0015] Preferably, a top extension structure is installed in the outer frame below the filling frame body and on both sides of the central axis, and the top extension structure is configured to drive the filling frame body to rotate around the central axis.

[0016] Preferably, the lifting structure is an airbag structure, and the airbag structure is configured to lift the filler frame on the corresponding side when inflated; and the airbag structures on both sides of the central axis are in opposite states; and

[0017] A gas delivery device is installed between the airbag structures on both sides of the same filler frame, and the gas delivery device is configured to guide the gas in one airbag structure to flow into the other airbag structure.

[0018] Preferably, a drainage mechanism is installed at least in the second artificial wetland box, and the drainage mechanism includes:

[0019] The flexible guide plate is arranged below the soil layer in the second artificial wetland box, and includes an upward concave state and a downward concave state. When in the upward concave state, it receives and guides part of the water that seeps down from the soil layer to directly flow into the second outlet;

[0020] The driving structure controls the flexible guide plate to gradually switch from a concave state to an upward concave state when the water level in the second artificial wetland box rises.

[0021] Preferably, partitions are provided on both sides of the flexible guide plate, and the two partitions at least divide the area above the flexible guide plate into independent areas. The partitions are provided with notches at the flexible guide plate, and the side edges of the flexible guide plate are slidably installed in the notches through vertical plates, and the vertical plates are connected to the driving structure. The driving structure controls the vertical plates to rise or fall in the notches, and when the vertical plates rise, the flexible guide plates are pulled to gradually switch from a concave state to an upper concave state, while closing the notch; when the vertical plates descend, the flexible guide plates are pushed to gradually switch from an upper concave state to a concave state, while opening the notch.

[0022] Preferably, the driving structure comprises a vertical cylinder, the vertical cylinder is provided with an opening, the opening connects the inner cavity of the vertical cylinder and the filling frame, a buoy is placed in the inner cavity, the buoy is connected to the vertical plate, and drives the vertical plate to move synchronously with the floating or sinking of the buoy.

[0023] Beneficial effects: In the present invention, three-dimensional water treatment is achieved by vertically arranging several groups of artificial wetland modules, and each group of artificial wetland modules includes two artificial wetland boxes arranged in a stepped manner, which cooperate with the inlet, outlet and filler frame to achieve self-underwater filtration while guiding the surface flow of water to flow out of the second artificial wetland box along the S-shaped flow from the first artificial wetland box;

[0024] In addition, the upper and lower artificial wetland boxes are arranged, and the second outlet and the first outlet below are arranged. The first outlet receives the water flow falling from the second outlet, and the impact of the falling water flow is used to increase the oxygen in the water flow after the undercurrent, without the need for a separate aeration device.

[0025] The present invention is provided with an adjustment mechanism, which can adjust the tilt direction of the filling frame regularly or as needed, so as to avoid serious deviation of the filling pattern in the filling frame due to the flow of water due to tilt, thereby reducing maintenance costs and increasing service life.

[0026] In the present invention, through the action of the drainage mechanism, when the water level in the artificial wetland box is too high, rapid drainage can be achieved, thereby accelerating the flow of water in the entire artificial wetland device, avoiding the situation where the water level in the upper artificial wetland box is accumulated due to slow infiltration in the upper artificial wetland box and too little water in the lower artificial wetland box, and comprehensively utilizing the overall utilization efficiency of the entire artificial wetland device to improve the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0028] In the attached picture:

[0029] Figure 1 It is a structural schematic diagram of the three-dimensional artificial wetland device of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure inside the first artificial wetland box of the present invention;

[0031] Figure 3 is a schematic diagram of the structure inside the second artificial wetland box of the present invention;

[0032] Figure 4 is a schematic structural diagram of a second artificial wetland box of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the flexible guide plate of the present invention;

[0034] Figure 6 It is the autumn and winter A1-A4 of the present invention. Concentration variation over time;

[0035] Figure 7 The A1 and B1 water outlets of the present invention in autumn and winter Concentration versus time graph;

[0036] Figure 8 The A2 and B2 water outlets of the present invention in autumn and winter Concentration versus time graph;

[0037] Fig. 9 The A3 and B3 water outlets of the present invention in autumn and winter Concentration versus time graph;

[0038] Fig.10 It is the A4 and B4 outlets of the present invention in autumn and winter Concentration versus time graph;

[0039] Fig.11is a graph showing the change in concentration of various pollutants at the water outlet of the present invention over time;

[0040] Numbers in the figure: 1. first artificial wetland box; 2. second artificial wetland box; 3. outer frame; 4. packing frame; 5. first inlet; 6. first outlet; 7. second inlet; 8. second outlet; 9. third outlet; 10. notch; 11. center axis; 12. top extension structure; 13. flexible guide plate; 14. partition; 15. notch; 16. vertical plate; 17. vertical tube; 18. opening; 19. buoy; 20. rubber pad; 21. arc block. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described below in conjunction with the drawings in the embodiments of the present invention. The terms used in the implementation mode of the present invention are only used to explain the specific embodiments of the present invention, and are not intended to limit the present invention. The embodiments of the present application are described below in conjunction with the drawings.

[0042] like Figure 1 As shown, a three-dimensional artificial wetland device includes a plurality of groups of artificial wetland modules arranged in a vertical direction, each group of artificial wetland modules includes two artificial wetland boxes, which are set as a first artificial wetland box 1 and a second artificial wetland box 2. The first artificial wetland box 1 and the second artificial wetland box 2 are arranged in a stepped manner, and the first artificial wetland box 1 is higher than the second artificial wetland box 2. In the vertical direction, the positions of the first artificial wetland box 1 and the second artificial wetland box 2 of each layer are alternately arranged; for example, referring to Figure 1 As shown, the first artificial wetland box 1 of the first layer corresponds to the second artificial wetland box 2 of the second layer below, and the second artificial wetland box 2 of the first layer corresponds to the first artificial wetland box 1 of the second layer below; the first artificial wetland box 1 and the second artificial wetland box 2 both include an outer frame 3 and a stuffing frame 4, and the stuffing frames 4 in the first artificial wetland box 1 and the second artificial wetland box 2 are arranged in the corresponding outer frame 3 in an inclined manner in opposite directions; a first inlet 5 and a first outlet 6 are arranged on the outer frame 3 in the first artificial wetland box 1, the first inlet 5 corresponds to the high position of the corresponding stuffing frame 4, and is configured to guide the water flow to the high position of the stuffing frame 4; the first outlet 6 corresponds to the low position of the corresponding stuffing frame 4, and is configured to receive The outer frame 3 of the second artificial wetland box 2 is provided with a second inlet 7 and a second outlet 8, the second inlet 7 corresponds to the corresponding high point of the filling frame 4, and is connected with the first outlet 6 through a pipe, and the second outlet 8 corresponds to the corresponding low point of the filling frame 4, and is used to guide the water to flow out and fall to the first inlet 5 of the corresponding first artificial wetland box 1 below; the first artificial wetland box 1 and the second artificial wetland box 2 also include a third outlet 9, which is arranged at the bottom end of the first artificial wetland box 1 and the second artificial wetland box 2 and close to the corresponding low point of the filling frame 4, and the third outlet 9 is configured to lead out the water that seeps down from the first artificial wetland box 1 and the second artificial wetland box 2.

[0043] Based on the above, reference Figure 1 As shown, sewage enters from the first inlet 5 of the first artificial wetland box 1 of the first layer, and flows into the high place of the filling frame 4 corresponding to the first artificial wetland box 1 through the first inlet 5. The filling frame 4 is filled with fillers, including soil for planting plants, and the lower layer of the soil includes a gravel layer and / or a zeolite layer; a part of the sewage infiltrates into the filling frame 4, and continuously infiltrates along the fillers to the corresponding third outlet 9, and is discharged from the third outlet 9; based on this, it can be directly discharged from the third outlet 9 and fall into the second artificial wetland box 2 of the lower layer, or the third outlet 9 of the first artificial wetland box 1 is connected to the second outlet 8 of the second artificial wetland of the same layer through a pipeline, or a drip structure is set at the third outlet 9 to introduce it into the second artificial wetland box 2 of the next layer;

[0044] Another part of the sewage flows on the surface, enters the first outlet 6, and enters the second inlet 7 through the pipe between the first outlet 6 and the second inlet 7, and then enters the filler frame 4 in the second artificial wetland box 2 from the second inlet 7. Also through the seepage or surface flow, a part of the sewage is discharged through the third outlet 9 of the second artificial wetland box 2. The water flow method of the third outlet 9 can be set in the same way as above, and the other part is discharged along the second outlet 8;

[0045] refer to Figure 1 As shown, the second artificial wetland box 2 in the artificial wetland module of the upper layer is located above the first artificial wetland box 1 in the artificial wetland module of the lower layer, and the first inlet 5 of the first artificial wetland box 1 of the lower layer is located below the second outlet 8 of the second artificial wetland box 2 of the upper layer, and is used to receive the water flow falling from the second outlet 8, and a notch 10 is provided in the first inlet 5 of at least the first artificial wetland box 1 of the second stage downward in the vertical direction, and the notch 10 is used to store a fixed amount of water flow; the impact of the falling water flow can increase the oxygen in the water flow after the undercurrent, without the need for a separate aeration device;

[0046] In a specific embodiment, based on the above, a first inlet 5 and a first outlet 6 are provided on the outer frame 3 of the first artificial wetland box 1 at both ends of the inclined filling frame 4; a second inlet 7 and a second outlet 8 are provided on the outer frame 3 of the second artificial wetland box 2 at both ends of the inclined filling frame 4; and an adjusting mechanism is provided at the bottom of the filling frame 4 in the first artificial wetland box 1 and the second artificial wetland box 2, and the adjusting mechanism is configured to switch the inclination direction of the filling frame 4 regularly or as needed. Similarly, when the water level in the artificial wetland box is too high, rapid drainage can be achieved to accelerate the flow of water in the entire artificial wetland device, avoid the situation where the water level in the upper artificial wetland box is too slow to seep in, resulting in accumulation of water in the upper artificial wetland box and too little water in the lower artificial wetland box, comprehensively consider the overall utilization efficiency of the entire artificial wetland device, improve the purification effect, and the corresponding outlet is sealed on the high side of the filling frame 4.

[0047] refer to Figure 2 As shown, when the filling frame 4 is tilted toward the left, the right side of the filling frame 4 will be higher than the right outlet on the outer frame 3, and the left side will be lower than the left outlet on the outer frame 3. Figure 3 As shown, when the filling frame 4 is tilted toward the right, the right side of the filling frame 4 will be lower than the outlet on the right side of the outer frame 3, and the left side will be higher than the outlet on the left side of the outer frame 3, and the high part of the filling frame 4 will block the outlet;

[0048] Furthermore, a rubber pad 20 may be provided on the outer surface of the filling frame 4, so as to dynamically fill the gap between the filling frame 4 and the outer frame 3 and better shield the outlet when the filling frame 4 is at a high place.

[0049] Among them, reference Figure 2-Figure 3 As shown, the adjustment mechanism includes a central axis 11, which is located at the center position below the filling frame 4. The central axis 11 rotates or the filling frame 4 rotates around the central axis 11 to adjust the inclination direction of the filling frame 4. A driving motor can be set at the end of the central axis 11 to drive the central axis 11 to rotate to adjust the orientation of the filling frame 4.

[0050] In order to prevent the packing frame 4 from rigidly changing its state and affecting the internal packing state, a top extension structure 12 is installed below the packing frame 4 in the outer frame 3 and on both sides of the central axis 11. The top extension structure 12 is configured to drive the packing frame 4 to rotate around the central axis 11. In a specific embodiment, refer to Figure 2-Figure 3 As shown, the extension structure 12 is an airbag structure, which is configured to lift the stuffing frame 4 on the corresponding side when inflated; and the airbag structures on both sides of the central axis 11 are in opposite states; and the airbag structures on both sides of the same stuffing frame 4 can be connected by installing an air delivery device, such as a pump structure, etc., so that the gas can be delivered from one area to another area, and the air delivery device is configured to guide the gas in one airbag structure to flow into another airbag structure.

[0051] For example, refer to Figure 2 As shown, gas is transported from the right airbag structure of the central axis 11 to the left airbag structure through the air delivery device, so that the right airbag structure gradually collapses downward and the right airbag structure gradually bulges upward, thereby slowly and steadily adjusting the tilt direction of the filling frame 4.

[0052] Based on the above, the position of the gas transmission device can be optionally set: between the first artificial wetland box 1 and the second artificial wetland box 2 on the same layer. Specifically, in the same layer, by connecting the two air bag structures on the same side of the first artificial wetland box 1 to the gas transmission device through a pipeline, when working, the gas in the air bag structure in the first artificial wetland box 1 is transported to the inner air bag structure on the same side of the second artificial wetland box 2. At the same time, the air bag structures on both sides perform the above operations at the same time, thereby achieving synchronous and relative adjustment in the first artificial wetland box 1 and the second artificial wetland box 2.

[0053] In a specific embodiment, based on the above content, reference Figure 4 As shown, a drainage mechanism is also installed at least in the second artificial wetland box 2, and the drainage mechanism includes: a flexible guide plate 13 and a driving structure. The flexible guide plate 13 is arranged below the soil layer in the second artificial wetland box 2, including an upward concave state and a downward concave state. An arc block 21 can be arranged below the flexible guide plate 13, and the flexible guide plate 13 is supported in the downward concave state by the arc block 21. The center of the flexible guide plate 13 is fixedly connected to the arc block 21, and in the upward concave state, it receives and guides part of the water seeping from the soil layer to directly flow into the second outlet 8; when the water level in the second artificial wetland box 2 rises, the driving structure controls the flexible guide plate 13 to gradually switch from the downward concave state to the upward concave state.

[0054] Partitions 14 are provided on both sides of the flexible guide plate 13. The two partitions 14 at least divide the area above the flexible guide plate 13 into independent areas. The partitions 14 are provided with gaps 15 at the flexible guide plate 13. The side of the flexible guide plate 13 is slidably installed in the gap 15 through a vertical plate 16. The vertical plate 16 is connected to a driving structure. The driving structure controls the vertical plate 16 to rise or fall in the gap 15, and pulls the flexible guide plate 13 to gradually switch from a concave state to an upper concave state when the vertical plate 16 rises, and closes the gap 15 at the same time. When the vertical plate 16 falls, the flexible guide plate 13 is pushed to gradually switch from an upper concave state to a concave state, and open the gap 15 at the same time.

[0055] The driving structure includes a vertical cylinder 17, which is provided with an opening 18, which connects the inner cavity of the vertical cylinder 17 and the filling frame 4. A buoy 19 is placed in the inner cavity, and the buoy 19 is connected to the vertical plate 16. As the buoy 19 floats up or down, it drives the vertical plate 16 to move synchronously.

[0056] Based on the above, when working, refer to Figure 5 and take the second artificial wetland box 2 as an example, when the water level in the second artificial wetland box 2 is too high due to reasons such as too slow infiltration, or blocked outlet, or too fast water inflow, at this time, the buoy 19 (a structure with an air bag and can float on the water) rises and pulls the vertical plate 16 below to move upward. When the vertical plate 16 moves upward, on the one hand, the gap 15 is closed by the vertical plate 16 itself, and on the other hand, it can synchronously drive the end of the flexible guide plate 13 to move upward. Since the flexible center of the arc support is fixedly connected to the arc block 21, when the two ends of the flexible guide plate 13 move upward at different times, it can switch to an upward concave state. The flexible guide plate 13 in the upward concave state can intercept part of the water that seeps from the soil and flows directly to the second artificial wetland box 20 along with the inclined state. In the second outlet 8, the sewage flows directly downward to the artificial wetland box below through the second outlet 8. This part of sewage does not need to pass through the filler under the soil for the infiltration process, thereby realizing rapid drainage, accelerating the flow of water in the entire artificial wetland device, and avoiding the situation where the upper artificial wetland box infiltrates too slowly, resulting in water accumulation in the upper artificial wetland box and too little water in the lower artificial wetland box. The overall utilization efficiency of the entire artificial wetland device is comprehensively considered to improve the purification effect; when the water level drops, the buoy 19 drops synchronously, the vertical plate 16 resets under the action of gravity, and opens the gap 15, the flexible guide plate 13 resets to a concave state, and the sewage that infiltrates onto the flexible guide plate 13 flows along the flexible guide plate 13 to the gaps 15 on both sides, and flows into the filler under the soil, realizing adaptive dynamic adjustment.

[0057] Based on the above, in a specific experimental simulation case:

[0058] Test water:

[0059] Referring to the initial rainstorm runoff concentration in the Yangtze River Delta Basin of my country, simulated rainwater was used for the test [65,66], and glucose, NH4Cl, and KH2PO4 were added to tap water to prepare artificial wastewater. The specific water quality of the inlet is shown in the following table:

[0060]

[0061] Experimental matrix:

[0062] The filler matrix is ​​gravel, sand and soil. After being screened, washed and dried, the gravel and sand are filled in accordance with the principle of decreasing particle size from bottom to top. The thickness and particle size of each layer are shown in the table below. The multi-layer matrix setting can improve the purification efficiency of the wetland and effectively prevent clogging:

[0063]

[0064] Test method:

[0065] Trial period: October 2022-August 2023;

[0066] Experimental content: (1) It is divided into two stages. The first stage is from October to November 2022. The hydraulic load is set to 280 mm / d. The wetland filler is cleaned and divided into two parts, and one part is retained for preparation for the next stage of the experiment. Clean water is introduced into the wetland, and the experiment begins after 15 days of operation. The configured sewage is pumped into the wetland inlet through a peristaltic pump. The wetland is operated in a manner of running for 2 days and stopping water for 1 day. Water samples are taken every 3 days for measurement, 8 to 9 times of sampling, and a control group is set up. This stage mainly explores the removal rules of pollutants by artificial wetland devices under low temperature conditions and their advantages over traditional wetlands. After the first stage of the experiment, all substrates in the device are removed and the device is cleaned; (2) The second stage is from July to August 2023. The hydraulic load of the second stage is set to 280 mm / d, the wetland substrate is refilled for experiment, and a control group is set up. This stage explores the changes in the removal rules of pollutants by artificial wetland devices under high temperature conditions and their advantages over traditional wetlands.

[0067] Phase I: The experiment was conducted from October 13 to November 9, with water taken 9 times, the highest temperature was 18°C, the lowest temperature was 5°C, and the average temperature was 12.5°C. A control experiment was set up, and the experiment took the sewage from the fourth level of the wetland according to the time gradient and conducted and TP, and draw a graph of the pollutant concentration at each water intake versus wetland level and a graph of the pollutant concentration at a specific level in the wetland versus time; refer to Figure 6 As shown, the NH4+-N concentration of A1 to A4 in autumn and winter changes with time; yellow represents the concentration of NH4+-N in group A (artificial wetland device of the present invention). concentration, green represents group B (traditional wetlands) concentration;

[0068] It can be seen that the exits of A1 and A2 The concentrations have the same trend; the A1 and A2 outlets The concentration changes significantly with time. The concentration also changes significantly with time. This shows that in the winter experiment, The removal of water is concentrated in the first, second and third levels. The purification efficiency of the first level wetland is 98.34% at the highest and 0% at the lowest; the purification efficiency of the first two levels of wetlands is 99.04% at the highest and 0.34% at the lowest; the purification efficiency of the first three levels of wetlands is 99.10% at the highest and 86.90% at the lowest; the final purification efficiency of each water intake is above 96.84%; reference Figure 7-Figure 10 As shown, in order to more intuitively compare the concentration changes between Group A and Group B at different water extraction times, the outlets of each level of wetland The concentration changes over time for comparison; the final effluent shows that the purification efficiency of the artificial wetland device of the present invention is still very high.

[0069] Phase I: The experiment was conducted from July 16 to August 9, with water taken 8 times, the highest temperature was 36°C, the lowest temperature was 28°C, and the average temperature was 31.7°C. The outlet pollutant concentration data were collected, and the concentration of various pollutants after purification by the entire artificial wetland device was plotted over time, such as Fig.11 As shown in the figure, the concentration of various pollutants at the outlet changes with time; Fig.11 It can be seen that COD and The purification efficiency has been maintained at a high level, with an average COD purification efficiency of 82.54%. The purification efficiency reached almost 100%, which is higher than that of many existing wetlands. The TP concentration was relatively small in the early stage of the experiment. After the second water extraction, the TP purification efficiency decreased. At this time, the adsorption of phosphorus by the wetland matrix has gradually stabilized, but the adsorption capacity of phosphorus is still at a relatively high level. In the subsequent water extractions, the adsorption capacity of the matrix continued to decline, and the final concentration reached a peak.

[0070] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this technical field, after knowing the contents recorded in the present invention, they can make several equivalent changes and substitutions without departing from the principle of the present invention. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A three-dimensional artificial wetland device, characterized in that: The invention comprises a plurality of groups of artificial wetland modules arranged in a vertical direction, each group of artificial wetland modules comprises two artificial wetland boxes, which are set as a first artificial wetland box and a second artificial wetland box, the first artificial wetland box and the second artificial wetland box are arranged in a stepped manner, and the first artificial wetland box is higher than the second artificial wetland box; the first artificial wetland box and the second artificial wetland box each comprise an outer frame and a filling frame body, and the filling frames in the first artificial wetland box and the second artificial wetland box are arranged in the corresponding outer frame in an inclined manner in opposite directions; and The outer frame in the first artificial wetland box is provided with a first inlet and a first outlet, the first inlet corresponds to the corresponding high point of the packing frame and is configured to guide the water flow to the high point of the packing frame; the first outlet corresponds to the corresponding low point of the packing frame and is configured to receive the water flow flowing out from the low point of the packing frame; The outer frame of the second artificial wetland box is provided with a second inlet and a second outlet, the second inlet corresponds to the corresponding high point of the filling frame and is connected to the first outlet through a pipeline, and the second outlet corresponds to the corresponding low point of the filling frame and is used to guide the water flow to flow out and fall to the first inlet of the corresponding first artificial wetland box below; The first artificial wetland box and the second artificial wetland also include a third outlet, which is arranged at the bottom end of the first artificial wetland box and the second artificial wetland and close to the corresponding lower part of the filling frame, and the third outlet is configured to lead out water seeping from the first artificial wetland box and the second artificial wetland box.

2. A three-dimensional artificial wetland device according to claim 1, characterized in that: The second artificial wetland box in the artificial wetland module of the upper layer is located above the first artificial wetland box in the artificial wetland module of the lower layer, and the first inlet of the first artificial wetland box of the lower layer is located below the second outlet of the second artificial wetland box of the upper layer and is used to receive the water flow falling from the second outlet.

3. A three-dimensional artificial wetland device according to claim 2, characterized in that: A slot is provided in the first inlet of at least the first artificial wetland box of the second stage in the vertical downward direction, and the slot is used to store a fixed amount of water flow.

4. The three-dimensional artificial wetland device according to claim 1, characterized in that: The outer frame of the first artificial wetland box is provided with a first inlet and a first outlet at both ends of the inclined filling frame; the outer frame of the second artificial wetland box is provided with a second inlet and a second outlet at both ends of the inclined filling frame; and The bottom of the filling frames in the first artificial wetland box and the second artificial wetland box are both provided with adjustment mechanisms, which are configured to switch the tilting direction of the filling frames regularly or as needed, and the corresponding outlet is sealed on one side of the upper side of the filling frames.

5. The three-dimensional artificial wetland device according to claim 4, characterized in that: The regulating mechanism comprises: The central axis is located at the center position below the packing frame. The central axis rotates or the packing frame rotates around the central axis to adjust the tilt direction of the packing frame.

6. A three-dimensional artificial wetland device according to claim 5, characterized in that: The outer frame is located below the filling frame body and is provided with a top extension structure on both sides of the central axis. The top extension structure is configured to drive the filling frame body to rotate around the central axis.

7. The three-dimensional artificial wetland device according to claim 6, characterized in that: The lifting structure is an airbag structure, which is configured to lift the filler frame on the corresponding side when inflated; and the airbag structures on both sides of the central axis are in opposite states; and A gas delivery device is installed between the airbag structures on both sides of the same filler frame, and the gas delivery device is configured to guide the gas in one airbag structure to flow into the other airbag structure.

8. The three-dimensional artificial wetland device according to claim 1, characterized in that: A drainage mechanism is installed at least in the second artificial wetland box, and the drainage mechanism includes: The flexible guide plate is arranged below the soil layer in the second artificial wetland box, and includes an upward concave state and a downward concave state. When in the upward concave state, it receives and guides part of the water that seeps down from the soil layer to directly flow into the second outlet; The driving structure controls the flexible guide plate to gradually switch from a concave state to an upward concave state when the water level in the second artificial wetland box rises.

9. The three-dimensional artificial wetland device according to claim 8, characterized in that: Partitions are provided on both sides of the flexible guide plate, and the two partitions at least divide the area above the flexible guide plate into independent areas. The partitions are provided with notches at the flexible guide plate, and the side edges of the flexible guide plate are slidably installed in the notches through vertical plates, and the vertical plates are connected to the driving structure. The driving structure controls the vertical plates to rise or fall in the notches, and when the vertical plates rise, the flexible guide plates are pulled to gradually switch from a concave state to an upper concave state, and the notches are closed at the same time, and when the vertical plates are lowered, the flexible guide plates are pushed to gradually switch from an upper concave state to a concave state, and the notches are opened at the same time.

10. The three-dimensional artificial wetland device according to claim 9, characterized in that: The driving structure includes a vertical cylinder, which is provided with an opening, the opening connecting the inner cavity of the vertical cylinder and the filler frame, a buoy is placed in the inner cavity, the buoy is connected to the vertical plate, and drives the vertical plate to move synchronously with the floating or sinking of the buoy.

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