CN217734263U - Sponge urban rainwater purifies recycling system - Google Patents

Abstract

The utility model relates to a rainwater purifies technical field, and discloses sponge city rainwater purifies recycling system, including cutting the flood ditch, grass planting ditch, formula greenery patches that sink, sedimentation tank and constructed wetland, the top both sides of cutting the flood ditch all are equipped with the first pavement that permeates water, pass through between cut flood ditch and the grass planting ditch the first connection of mating formation that permeates water, it permeates water to be equipped with the second between grass planting ditch and the formula greenery patches that sink and mat formation, be equipped with drainage channel between formula greenery patches and the sedimentation tank that sink, the sedimentation tank with be equipped with inlet channel between the constructed wetland, constructed wetland is kept away from one side of sedimentation tank is equipped with overflow pipe. The utility model discloses can realize the function of city rainwater purification retrieval and utilization, reduce waterlogging calamity and water pollution's phenomenon.

Description

Sponge urban rainwater purifies recycling system

Technical Field

The utility model relates to a rainwater purifies technical field, especially relates to sponge urban rainwater purifies recycling system.

Background

In the current rapid urbanization process, the urban construction achievement is remarkable, but the overall development strength is high, so that on one hand, the hardened area of an underlying surface is increased due to facility construction of roads, building roofs and the like of the city, the original hydrological environment of the urban area is changed, the natural permeability of the urban surface is reduced, and the total surface runoff amount is increased; on the other hand, the natural filtration and infiltration of grasslands and woodlands are lacked, so that the concentration of pollutants in surface runoff is higher, and the urban water quality is poor. Due to the influence of climate, the season distribution of rainfall is extremely uneven, and the urban drainage system is overwhelmed by sudden heavy rainfall and continuous heavy rain weather, thereby bringing serious loss to social economy. Therefore, the current problems of urban inland inundation disasters and water pollution are one of the nuclear problems restricting the urban ecological civilization development and ecological city construction in China, and the problems are caused because the urban underlay surface impervious area proportion is continuously improved, the rainwater infiltration amount is rapidly reduced, the surface runoff is gradually increased under the high urbanization condition in China, and finally the burden of a municipal drainage pipe network is continuously increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems of urban waterlogging disasters and water pollution, which is a problem restricting the urban ecological civilization development and ecological city construction in China, and providing a sponge urban rainwater purification and recycling system.

In order to realize the purpose, the utility model adopts the following technical scheme:

sponge city rainwater purifies recycling system, including cutting the flood ditch, grass planting ditch, formula greenery patches that sinks, sedimentation tank and constructed wetland, the top both sides of cutting the flood ditch all are equipped with the first permeable pavement, cut and pass through between flood ditch and the grass planting ditch the first permeable pavement is connected, it permeates water to be equipped with the second between grass planting ditch and the formula greenery patches that sink and paves, be equipped with drainage channel between formula greenery patches and the sedimentation tank, the sedimentation tank with be equipped with inlet channel between the constructed wetland, constructed wetland keeps away from one side of sedimentation tank is equipped with overflow pipe.

Preferably, the grass planting ditch comprises a first rubble layer, first permeable geotextile, a first planting soil layer and a first planting layer, wherein the first rubble layer, the first permeable geotextile and the first planting soil layer are sequentially laid from bottom to top, and the first planting layer is planted inside the first planting soil layer.

Preferably, the sunken greenbelt comprises a water storage ditch, a second gravel layer, a first ceramic particle layer, a second permeable geotextile, a sand-mixed vermiculite layer, a second planting soil layer and a second planting layer, wherein the water storage ditch, the second gravel layer, the first ceramic particle layer, the second permeable geotextile, the sand-mixed vermiculite layer and the second planting soil layer are sequentially laid from bottom to top, the second planting layer is planted inside the second planting soil layer, and the drainage channel is arranged inside the water storage ditch.

Preferably, the constructed wetland comprises a third rubble layer, a second ceramsite layer, a zeolite layer, a third permeable geotextile, a third planting soil layer, a bark covering layer, a water storage layer and a third planting layer, wherein the third rubble layer, the second ceramsite layer, the zeolite layer, the third permeable geotextile, the third planting soil layer, the bark covering layer and the water storage layer are laid in sequence from bottom to top, and the third planting layer is planted inside the third planting soil layer.

Preferably, the top of the sedimentation tank is provided with a trash rack and a third permeable pavement.

Preferably, the bottom of the artificial wetland is paved with a bentonite pad, and the inside of the water storage layer is provided with an aeration pump.

Preferably, rainwater grate and paving pebbles are arranged on two sides of the top of the sunken green land.

Compared with the prior art, the utility model provides a sponge city rainwater purifies recycling system possesses following beneficial effect:

(1) The runoff flow velocity is slowed down, the step flood intercepting ditches are arranged according to the topography to intercept the runoff of rainwater, the energy is dissipated layer by layer, the grass planting ditches and the sunken green land collect, regulate, store and discharge the rainwater step by step, and the runoff rainwater is primarily purified.

(2) The rainwater is purified deeply, the trash rack intercepts large-particle floating garbage, runoff after passing through the trash rack and runoff in the water storage ditch are collected to the sedimentation tank, silt in the runoff can be precipitated, and then the runoff is purified by each layer of the surface flow wetland and plants, the aeration device can promote the increase of the flow rate and the oxygen filling amount of the water body, and pollutants in the water body are effectively treated.

(3) Cut down the runoff peak value, in time the drainage sets up the gap with reference to municipal pipe network elevation, and in the great rainfall flood period of rainfall, the overflow is unified to the municipal pipe network and is digested the peak value water yield, keeps the interior water level line of place and is stable situation throughout the year. And the absorption reduction and rainwater purification are carried out on the peak flow in the hard field by combining permeable pavement.

(4) The rainwater recycling system has the function of storing rainwater, can reduce peak flow and reduce pressure of urban drainage facilities. Reasonably determining a rainwater collection area, ensuring water balance, and realizing sustainable utilization of resources, wherein the recovered rainwater can be used for municipal greening irrigation, road flushing, ground warehouse flushing and the like.

The part that does not relate to among the device all is the same with prior art or can adopt prior art to realize, the utility model discloses can realize the function of urban rainwater purification retrieval and utilization, reduce waterlogging calamity and water pollution's phenomenon.

Drawings

FIG. 1 is a schematic structural view of a sponge city rainwater purification and recycling system provided by the present invention;

FIG. 2 is a schematic view of the grass-planting trench of FIG. 1;

FIG. 3 is a schematic view of the structure of the sunken green land of FIG. 1;

fig. 4 is a schematic structural diagram of the artificial wetland in fig. 1.

In the figure: 1 section flood ditch, 2 grass planting ditch, 3 sinking type greenbelt, 4 sedimentation tank, 5 constructed wetland, 6 drainage channel, 7 water inlet pipe, 8 overflow pipe, 9 first rubble layer, 10 first permeable geotextile, 11 first planting soil layer, 12 first vegetable layer, 13 water storage ditch, 14 second rubble layer, 15 first ceramic particle layer, 16 second permeable geotextile, 17 sand mixed vermiculite layer, 18 second planting soil layer, 19 second vegetable layer, 20 third rubble layer, 21 second ceramic particle layer, 22 zeolite layer, 23 third permeable geotextile, 24 third planting soil layer, 25 bark covering layer, 26 third vegetable layer, 27 bentonite pad, 28 aeration pump, 29 dirt blocking net, 30 third permeable pavement, 31 rain grate pebble adding paving, 32 first permeable pavement and 33 second permeable pavement.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, the sponge urban rainwater purification and recycling system comprises a flood interception ditch 1, a grass planting ditch 2, a sunken green land 3, a sedimentation tank 4 and an artificial wetland 5, wherein first permeable pavements 32 are arranged on two sides of the top of the flood interception ditch 1, the flood interception ditch 1 is connected with the grass planting ditch 2 through the first permeable pavements 32, a second permeable pavement 33 is arranged between the grass planting ditch 2 and the sunken green land 3, a drainage channel 6 is arranged between the sunken green land 3 and the sedimentation tank 4, rainwater grate pebbles 31 are arranged on two sides of the top of the sunken green land 3, a water inlet pipeline 7 is arranged between the sedimentation tank 4 and the artificial wetland 5, and a sewage blocking net 29 and a third permeable pavement 30 are arranged on the top of the sedimentation tank 4; one side that sedimentation tank 4 was kept away from to constructed wetland 5 is equipped with overflow pipe 8, and overflow pipe 8 refers to municipal pipe network elevation setting, connects municipal pipe network or regulation pond and realizes the return water utilization.

Referring to fig. 2, the grass planting ditch 2 includes a first rubble layer 9, a first permeable geotextile 10, a first planting soil layer 11 and a first planting layer 12, the first rubble layer 9, the first permeable geotextile 10 and the first planting soil layer 11 are laid in sequence from bottom to top, and the first planting layer 12 is planted inside the first planting soil layer 11.

Referring to fig. 3, the subsidence type green land 3 comprises a water storage ditch 13, a second gravel layer 14, a first ceramic grain layer 15, a second permeable geotextile 16, a sand-mixed vermiculite layer 17, a second planting soil layer 18 and a second planting layer 19, wherein the water storage ditch 13, the second gravel layer 14, the first ceramic grain layer 15, the second permeable geotextile 16, the sand-mixed vermiculite layer 17 and the second planting soil layer 18 are sequentially laid from bottom to top, the second planting layer 19 is planted inside the second planting soil layer 18, a drainage channel 6 is arranged inside the water storage ditch 13, the second gravel layer 14 is 30-40cm in thickness, 35cm is taken as an example, the first ceramic grain layer 15 is 30-40cm in thickness, 35cm is taken as an example, the sand-mixed vermiculite layer 17 is 15-20cm in thickness, 18cm is taken as an example, and the second planting soil layer 18 is 15-20cm in thickness, 18cm is taken as an example.

Referring to fig. 4, the artificial wetland 5 comprises a third rubble layer 20, a second ceramsite layer 21, a zeolite layer 22, a third permeable geotextile 23, a third planting soil layer 24, a bark covering layer 25, a water storage layer 34 and a third planting layer 26, wherein the third rubble layer 20, the second ceramsite layer 21, the zeolite layer 22, the third permeable geotextile 23, the third planting soil layer 24, the bark covering layer 25 and the water storage layer 34 are sequentially laid from bottom to top, and the third planting layer 26 is planted in the third planting soil layer 24; the bottom of the artificial wetland 5 is paved with a bentonite pad 27, the inside of the water storage layer 34 is provided with an aeration pump 28, and the aeration pump 28 can increase the flow of the water body and improve the oxygen content of the water body. The thickness of the third crushed stone layer 20 is 30-40cm, here exemplified by 35cm, the thickness of the second ceramic particle layer 21 is 30-40cm, here exemplified by 35cm, the thickness of the zeolite layer 22 is 15-20cm, here exemplified by 18cm, the thickness of the third vegetation layer 24 is 30-40cm, here exemplified by 35cm, and the thickness of the bark cover layer 25 is 3-5cm, here exemplified by 5 cm.

When the rainwater runoff collecting and storing device is used, the step flood intercepting ditches 1 are arranged according to topography, rainwater runoff can be intercepted, energy can be dissipated layer by layer, the grass planting ditches 2 and the sunken greenbelts 3 collect, regulate, convey and discharge rainwater step by step, and the runoff rainwater is purified preliminarily. The large granule planktonic waste of trash rack 29 interception, runoff behind trash rack 29 is to sedimentation tank 4, can deposit silt in the runoff, again through 5 layers of surface current constructed wetland and plant purification, thereby can reduce the runoff peak value, in time the drainage, refer to municipal pipe network elevation and set up the gap, in the great rainfall flood season of rainfall, the overflow is to the unified digestion peak value water yield of municipal pipe network, it is stable situation to keep the water line in the place to be the year round, combine permeable pavement, reduce absorption and rainwater purification to peak flow in the stereoplasm place.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims (8)

1. Sponge city rainwater purifies recycling system, including cutting flood ditch (1), grass planting ditch (2), formula greenery patches that sinks (3), sedimentation tank (4) and constructed wetland (5), its characterized in that, the top both sides of cutting flood ditch (1) all are equipped with first permeable pavement (32), cut and pass through between flood ditch (1) and the grass planting ditch (2) first permeable pavement (32) are connected, it permeates water pavement (33) to be equipped with the second between grass planting ditch (2) and the formula greenery patches that sink (3), be equipped with drainage channel (6) between formula greenery patches that sink (3) and sedimentation tank (4), sedimentation tank (4) with be equipped with inlet channel (7) between constructed wetland (5), constructed wetland (5) are kept away from one side of sedimentation tank (4) is equipped with overflow pipe (8).

2. The sponge urban rainwater purification and recycling system according to claim 1, wherein the grass planting ditch (2) comprises a first gravel layer (9), a first permeable geotextile (10), a first planting soil layer (11) and a first planting layer (12), the first gravel layer (9), the first permeable geotextile (10) and the first planting soil layer (11) are laid in sequence from bottom to top, and the first planting layer (12) is planted inside the first planting soil layer (11).

3. The sponge urban rainwater purification and recycling system according to claim 1, wherein the sunken greenbelt (3) comprises an impoundment ditch (13), a second gravel layer (14), a first ceramic grain layer (15), a second permeable geotextile (16), a sand-mixed vermiculite layer (17), a second planting soil layer (18) and a second planting layer (19), the impoundment ditch (13), the second gravel layer (14), the first ceramic grain layer (15), the second permeable geotextile (16), the sand-mixed vermiculite layer (17) and the second planting soil layer (18) are sequentially laid from bottom to top, the second planting layer (19) is planted inside the second planting soil layer (18), and the drainage channel (6) is arranged inside the impoundment ditch (13).

4. The sponge urban rainwater purification and recycling system according to claim 3, wherein 3-8 impoundment channels (13) are arranged on the sunken greenbelt (3).

5. The sponge urban rainwater purification and recycling system according to claim 1, wherein the artificial wetland (5) comprises a third gravel layer (20), a second ceramic particle layer (21), a zeolite layer (22), a third permeable geotextile (23), a third planting soil layer (24), a bark cover layer (25), an aquifer (34) and a third planting layer (26), wherein the third gravel layer (20), the second ceramic particle layer (21), the zeolite layer (22), the third permeable geotextile (23), the third planting soil layer (24), the bark cover layer (25) and the aquifer (34) are sequentially laid from bottom to top, and the third planting layer (26) is planted inside the third planting soil layer (24).

6. The sponge city rainwater purification and reuse system according to claim 1, wherein a trash rack (29) and a third permeable pavement (30) are provided on the top of said sedimentation tank (4).

7. The sponge city rainwater purification and reuse system according to claim 5, characterized in that a bentonite pad (27) is laid at the bottom of said artificial wetland (5), and an aeration pump (28) is arranged inside said water-storage layer (34).

8. The sponge urban rainwater purification and recycling system according to claim 1, wherein rainwater grate plus paving pebbles (31) are arranged on both sides of the top of the sunken green land (3).

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