CN211367145U - Constructed wetland rainwater collection and reuse combined system for residential community - Google Patents
Constructed wetland rainwater collection and reuse combined system for residential community Download PDFInfo
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- CN211367145U CN211367145U CN201921723175.XU CN201921723175U CN211367145U CN 211367145 U CN211367145 U CN 211367145U CN 201921723175 U CN201921723175 U CN 201921723175U CN 211367145 U CN211367145 U CN 211367145U
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Abstract
The utility model relates to a retrieval and utilization combined system is collected to residential district constructed wetland rainwater, it includes the rainwater collecting pit and distributes in the polylith constructed wetland of each low-lying department in the district earth's surface, constructed wetland includes plain soil layer from bottom to top layer in proper order, the gravel layer, plant the soil layer and grow in the wetland plant on planting the soil layer, rainwater collection branch pipe has all been buried underground in the gravel layer of every constructed wetland, a plurality of rainwater collection branch pipes all collect house steward intercommunication with the rainwater, rainwater collection house steward collects the rainwater that the branch pipe was collected with a plurality of rainwater and collects back gravity drainage to rainwater collecting pit. The artificial wetland is fragmented and distributed at each low-lying part of the residential district according to the characteristics of the residential district, and the rainwater subjected to the preliminary filtration of the artificial wetland is drained to the rainwater collecting tank according to the self gravity, so that the blockage can be reduced, and the service life of the rainwater collecting tank is prolonged; the rainwater is recycled, and the treated water can be used for greening irrigation and road watering; the artificial wetland is a component of the community landscape, and the attractiveness of the community is improved.
Description
Technical Field
The utility model belongs to the retrieval and utilization field is collected to small-size constructed wetland and rainwater in the residential district, concretely relates to retrieval and utilization combined system is collected to residential district constructed wetland rainwater.
Background
With the development of economic technology and the progress of construction technology, building structures are increasingly developed towards function diversification and structural form complication, and the high-rise buildings of the basements with large floors in newly-built cells are more and more, and some basements are even provided. The large chassis basement is a continuation of the upper structure in the foundation, which can provide reliable embedding for the upper structure and connect the upper structure and the basement into an organic whole.
The surface covering soil layer of the large-chassis basement is about 1 to 1.2m thick generally, so that the arrangement of larger rainwater filtering and treating equipment in the surface covering soil layer is difficult to realize, namely, special primary treatment facilities such as a filter screen, a rainwater well and a flow discarding device cannot be arranged like a common residential quarter or municipal rainwater collecting system to perform primary treatment on rainwater for recycling. However, because the large-chassis basement has a thin covering layer, the water retention is poor, green plants on the ground surface need to be watered relatively more frequently, and the water consumption is large.
SUMMERY OF THE UTILITY MODEL
The utility model provides a retrieval and utilization combined system is collected to residence community constructed wetland rainwater aims at overcoming big chassis basement rainwater and collects retrieval and utilization difficulty and the green watering water consumption of planting of earth's surface not enough greatly etc..
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a retrieval and utilization combined system is collected to residential district constructed wetland rainwater, its includes the rainwater collecting pit and distributes in the polylith constructed wetland of each low-lying department in the district earth's surface, constructed wetland includes plain soil layer, gravel layer, planting soil layer and grows in from bottom to top layer in proper order plant the wetland plant on the soil layer, every constructed wetland all bury the rainwater in the gravel layer and collect the branch pipe, it is a plurality of the rainwater is collected the branch pipe and all is collected house steward intercommunication with the rainwater, the rainwater is collected house steward and is collected the rainwater that the branch pipe was collected with a plurality of rainwater and collect back gravity drainage extremely the rainwater collecting pit, every constructed wetland plant the soil layer and all be equipped with irrigation equipment, the rainwater collecting pit pass through rainwater retrieval and utilization pipeline with irrigation equipment intercommunication, be equipped with the water pump in the rainwater collecting pit.
On the basis of the technical scheme, the utility model discloses can also have following further specific selection.
Further, every overflow pipe and rainwater collection branch pipe have all been buried underground in the constructed wetland, the upper end of overflow pipe extends to the follow the surface of constructed wetland, or extend more than the surface and with the peripheral district road surface of constructed wetland keeps level, the lower extreme of overflow pipe with branch pipe one end intercommunication is collected to the rainwater, the other end and the rainwater of branch pipe are collected to the rainwater and are collected house steward intercommunication, the rainwater collect house steward with rainwater collecting pit or municipal rainwater pipe network intercommunication.
The further scheme has the advantages that when the primary rainfall is large, the artificial wetland pool can be filled with rainwater, and redundant rainwater flows to the rainwater collection pool or the municipal rainwater pipe network directly through the overflow pipe, so that water accumulation on the pavement of a community is avoided; the upper end of the overflow pipe is positioned on the surface of the artificial wet ground, so that the artificial wetland is ensured to be a subsurface flow type wetland, namely, no obvious accumulated water appears on the surface of the artificial wetland, the subsurface flow type wetland is adopted, firstly, mosquito breeding and stink caused by the fact that sewage covers the surface of the wetland are avoided, secondly, the surface is not easy to freeze in winter, and the influence of temperature on the purification effect of the wetland is reduced.
Furthermore, a filter screen is arranged at an opening at the upper end of the overflow pipe.
Adopt above-mentioned further scheme's beneficial effect to be, set up the debris that the filter screen can effectively avoid great volume and get into the overflow pipe and block up overflow pipe, rainwater collection branch pipe etc..
Further, the thickness of the gravel layer is 30-50cm, and the thickness of the planting soil layer is 20-40 cm.
The beneficial effect of adopting the further scheme is that the normal growth of wetland plants and the effects of wetland filtration and primary rainwater purification can be better ensured.
Further, the gravel layer has an average gravel particle diameter of 1.5 to 2 cm.
The beneficial effect who adopts above-mentioned further scheme is that, drainage effect is good.
Furthermore, the artificial wetland is in a circular, oval or polygonal pool shape, and the depth of the groove of the artificial wetland is 5-25 cm.
The beneficial effect of adopting above-mentioned further scheme is that, the artificial wetland pond of above-mentioned degree of depth is more applicable to the big chassis basement district that earthing layer thickness only has 1 to 1.2m, can guarantee that the wetland of bottom of the pool has suitable filler thickness, guarantees the filtration purification effect to the rainwater.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the characteristics of residential districts are fully considered, the artificial wetland is fragmented and distributed at each low-lying position of the residential district, rainwater is collected to the artificial wetland at the low-lying position in rainy days, rainwater surface source pollution can be effectively reduced after initial rainwater is treated by the artificial wetland, special rainwater primary treatment facilities are not needed, the hydraulic load of a rainwater collecting pool can be reduced, blockage is reduced, and the service life of the rainwater collecting pool is prolonged;
2. the rainwater is recycled, and the treated water can be used for greening irrigation and road watering.
3. The artificial wetland has a certain function of purifying sewage, and more importantly, the artificial wetland is a component of community landscape, and plants planted on the artificial wetland can keep coordination with the community landscape, so that the attractiveness of the community is improved;
4. the utility model provides a combined system can regard as the component in the sponge city in the district.
Drawings
Fig. 1 is a schematic view of a constructed wetland rainwater collection and reuse combination system for a residential community provided by the utility model;
fig. 2 is a schematic structural view of a certain constructed wetland in the system shown in fig. 1.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a plain soil layer; 2. a gravel layer; 3. planting a soil layer; 4. an overflow pipe; 5. a rainwater collection branch pipe; 6. a rainwater collection header.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, if terms indicating orientation such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in figures 1 and 2, the utility model provides a rainwater collecting and recycling combined system for constructed wetlands in residential districts, the artificial wetland comprises a rainwater collection tank and a plurality of artificial wetlands distributed at each low-lying position of the earth surface of a residential area, wherein each artificial wetland comprises a vegetable soil layer 1, a gravel layer 2, a planting soil layer 3 and wetland plants growing on the planting soil layer 3 from the bottom layer to the surface layer in sequence, a rainwater collection branch pipe is buried in each gravel layer of each artificial wetland, a plurality of rainwater collection branch pipes 5 are communicated with a rainwater collection header pipe 6, the rainwater collecting main pipe 6 collects rainwater collected by the plurality of rainwater collecting branch pipes 5 and then drains the rainwater to the rainwater collecting pool by gravity, an irrigation device is arranged on the planting soil layer 3 of each artificial wetland, the rainwater collecting tank is communicated with the irrigation device through a rainwater recycling pipeline, and a water pump communicated with the rainwater recycling pipeline is arranged in the rainwater collecting tank.
It should be noted that the rainwater collecting branch pipes are pipes with through holes uniformly arranged on pipe walls, rainwater infiltrates through gaps in a gravel layer formed by large-particle gravels and enters the rainwater collecting branch pipes through the through holes to be collected to the rainwater collecting main pipe, and proper height differences are formed among the rainwater collecting branch pipes, the rainwater collecting main pipe and the rainwater collecting pool, so that the collected rainwater can automatically drain downwards according to the set requirement by means of the gravity of the rainwater collecting branch pipes.
Further, every overflow pipe 4 and rainwater collection branch pipe 5 have all been buried underground in the constructed wetland, the upper end of overflow pipe 4 extends to the follow the surface of constructed wetland, or upwards extend to with the peripheral district road surface of constructed wetland keeps level, the lower extreme of overflow pipe 4 with branch pipe 5 end intercommunication is collected to the rainwater, branch pipe 5's the other end and rainwater collection house steward 6 intercommunication are collected to the rainwater, rainwater collection house steward 6 with rainwater collection pool intercommunication.
Furthermore, a filter screen is arranged at an opening at the upper end of the overflow pipe 4.
Further, the thickness of the gravel layer 2 is 30-50cm, and the thickness of the planting soil layer 3 is 20-40 cm.
Further, the gravel layer 2 has an average gravel particle diameter of 1.5 to 2 cm.
It should be noted that the average particle size of the gravel is within the above range, so that a good water filtering effect can be ensured, and the gravel does not enter the rainwater collecting branch pipe through the through holes on the pipe wall of the rainwater collecting branch pipe.
Furthermore, the artificial wetland is in a circular, oval or polygonal pool shape, and the depth of the groove of the artificial wetland is 5-25cm, namely the maximum depth of pool water in the wetland pool.
The total area of the artificial wetland in the rainwater collection and reuse combined system for the residential district and the volume of the rainwater collection pool are determined by the following method:
1. determination of total area of constructed wetland
The calculation formula of the subsurface flow type constructed wetland surface area is as follows: in the formula of A ═ Q (lnC0-lnCe)/(Kr ^ d ^ ψ), A is the surface area of the wetland bed, m2
Q-mean design flow, m3/d
BOD5, mg/L of Co, Ce-influent and effluent
The rate constant at Kr-temperature T ℃,d-1
d-depth of wetland bed, m
Psi-porosity of wetland bed packing.
Q-mean design flow, m3/d
First order reaction rate constant Kr ═ k20 × 1.06(T-20)Wherein K20 is the rate constant at a temperature of 20 ℃ and d-1T is water temperature, DEG C.
The average design flow Q is determined by the water amount required by daily greening irrigation and road sprinkling and the water amount evaporated and permeated every day; the inlet water BOD5 is determined according to the result of water quality monitoring, the water quality detection can be carried out according to the rainwater entering the artificial wetland, the outlet water BOD5 is determined according to the requirements of greening irrigation and road sprinkling on the water quality, and the porosity psi of the wetland bed filler is determined by simulating the filler structure of the artificial wetland through experiments.
For example, the porosity psi is 0.554, the inlet water quality C0 is about 140mg/L, the outlet water quality Ce is about 10mg/L, and the average design flow (treatment water quantity) Q is 100m3(d) the depth d of the filler is 1.2m, and the KT is 0.9277d-1Substituting the correlation data into the above formula, and processing 220m per day3The required artificial wetland area A is 100(ln140-ln10)/(0.9277 × 1.2 × 0.554) ═ 428m2Taking A as 430m2。
2. Determination of rainwater reuse pool volume
The volume of the rainwater recycling pool is determined by taking residential districts with the total planned land area of 10 ten thousand, the greening rate of 30 percent and the land area of 2 ten thousand as an example.
Greening area of 100000 × 30%: 30000m2
The annual average water consumption of greening and sprinkling in the residential district (secondary maintenance) is 0.28 x 30000m 8400m3/a
The annual spray irrigation days are 140 days, the average daily greening spraying amount is 8400/140-60 m3/d
Average daily water consumption of road is 0.5 x 10 x 20000 x 10m3Once/time
The average daily water consumption is 60+ 10-70 m3/d
Rainwater recycling poolThe effective volume of the rainwater recycling pool is not less than 3d, so that the rainwater recycling pool V is 3 x 70 x 210m3。
The utility model provides a retrieval and utilization combined system is collected to residence community constructed wetland rainwater has successfully been applied to a plurality of big chassis basement districts, and the practical application effect is better, and effectual rainwater of having utilized has saved a large amount of green plants and has irrigated and the district road sprays the water consumption.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides a retrieval and utilization combined system is collected to residential quarter constructed wetland rainwater, its characterized in that, includes rainwater collecting pit and the polylith constructed wetland that distributes in each low-lying department of residential quarter earth's surface, constructed wetland includes plain soil layer (1), gravel layer (2), planting soil layer (3) and grows in from bottom to top layer in proper order plant the wetland plant on soil layer (3), every constructed wetland has all buried rainwater collection branch pipe (5) in gravel layer (2) underground, and is a plurality of rainwater collection branch pipe (5) all communicate with rainwater collection house steward (6), rainwater collection house steward (6) collect the rainwater that a plurality of rainwater collection branch pipe (5) were collected the back gravity drainage extremely rainwater collecting pit, every constructed wetland plant soil layer (3) and all be equipped with irrigation equipment, the rainwater collecting pit pass through rainwater retrieval and utilization pipeline with irrigation equipment communicates, and a water pump is arranged in the rainwater collecting tank.
2. The residential community constructed wetland rainwater collection and reuse combined system according to claim 1, characterized in that an overflow pipe (4) and a rainwater collection branch pipe (5) are buried in each constructed wetland, the upper end of the overflow pipe (4) extends to the surface of the constructed wetland, the lower end of the overflow pipe (4) is communicated with one end of the rainwater collection branch pipe (5), the other end of the rainwater collection branch pipe (5) is communicated with a rainwater collection header pipe (6), and the rainwater collection header pipe (6) is communicated with the rainwater collection pool or a municipal rainwater pipe network.
3. The combined system for collecting and recycling rainwater of the constructed wetland in the residential district according to claim 2, characterized in that a filter screen is arranged at the opening of the upper end of the overflow pipe (4).
4. The combined system for collecting and recycling rainwater of the constructed wetlands of the residential community as claimed in claim 1, wherein the thickness of the gravel layer (2) is 30-50cm, and the thickness of the planting soil layer (3) is 20-40 cm.
5. The combined system for collecting and recycling rainwater of artificial wetlands of residential districts as claimed in claim 4, wherein the average particle size of gravels in said gravel layer (2) is 1.5-2 cm.
6. The combined system for collecting and recycling rainwater of artificial wetlands of residential districts according to any one of claims 1 to 5, wherein the artificial wetlands are in a shape of a circular, oval or polygonal pool, and the depth of the artificial wetland ditches is 5-25 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723175.XU CN211367145U (en) | 2019-10-15 | 2019-10-15 | Constructed wetland rainwater collection and reuse combined system for residential community |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723175.XU CN211367145U (en) | 2019-10-15 | 2019-10-15 | Constructed wetland rainwater collection and reuse combined system for residential community |
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| Publication Number | Publication Date |
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| CN211367145U true CN211367145U (en) | 2020-08-28 |
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| CN201921723175.XU Active CN211367145U (en) | 2019-10-15 | 2019-10-15 | Constructed wetland rainwater collection and reuse combined system for residential community |
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| CN (1) | CN211367145U (en) |
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