CN106121005A - The urban rainwater collection of a kind of northern area and cleaning system - Google Patents

Abstract

The invention discloses an urban rainwater collection and purification system in the northern region, which includes two parts: a rainwater collection system for urban roads and a rainwater pond purification system, and filter rainwater outlets and rainwater outlets are respectively arranged in the green belts and green spaces on both sides of the urban roadway. The overflow rainwater outlet, the filter rainwater outlet and the overflow rainwater outlet are connected to the rainwater pipe by pipes, and the rainwater pipe is connected to the water inlet of the rainwater pond purification system, and the collected rainwater passes through the sedimentation tank, the front grille, the front pond, and the overflow weir in sequence , Seepage storage area, rear grille and water outlet. Aquatic plants and erosion-resistant plants are installed in the front pond and seepage storage area and on the shore respectively; the purified rainwater is used as a Class IV and Class V water body, with significant environmental benefits.

Description

A urban rainwater collection and purification system in the northern region

technical field

The invention belongs to the field of environmental ecological engineering and specifically relates to a rainwater collection and purification system for a sponge city in the northern region.

Background technique

With the increase of impermeable area and the influence of extreme weather in the process of urbanization, urban waterlogging problem is caused, which seriously threatens urban safety. The construction of sponge city with the main planning and design concepts of "slow discharge and slow release" and "source decentralized" control will effectively alleviate the urban waterlogging problem and effectively solve the situation that the city looks at the sea.

The specific implementation methods of the sponge city include sunken green spaces, rainwater infiltration ponds, rainwater gardens, infiltration wells, infiltration grounds, infiltration pipes, and grass planting ditches, etc. The rainwater is collected and purified by plants to improve the utilization efficiency of rainwater and effectively improve the urban waterlogging problem.

The current patents for rainwater collection, purification and utilization in sponge cities include: an environmentally friendly and energy-saving courtyard-style rainwater collection, treatment and reuse system (201410022505.8), a rainwater collection, diversion, and stratum conservation storage system (201510394497.4), a An initial rainwater collection and off-line processing system (201310726665.6), a rotary automatic flow-discarding rainwater collection and utilization system and its installation method (201310256642.3), a rainwater infiltration collection device based on concrete sand-based permeable bricks (201310237771.8), a rainwater Collection and utilization device (201310038375.2), design method of rainwater treatment and utilization facilities (201010195702.1), a rainwater collection and purification method and device (201010040064.6), a comprehensive utilization of rainwater seepage drainage pipe (200910249978.0), an urban rainwater collection Anti-flooding groundwater replenishment system for roads and roads (200610153088.6), integrated system of early rainwater collection, diversion and ecological purification in the lakeside area (200510023294.0), a rainwater collection and infiltration system (201510264399.9), rainwater collection and treatment system (201510234148.6), rainwater collection system (201510075589.6), a rainwater recovery system for urban residential areas (201510057011.8), a rainwater comprehensive utilization system (201510050775.4), and a dynamic infiltration rainwater pond system based on low-impact development (201510046182.0), etc. However, due to one or more disadvantages of the above-mentioned patents, such as complex production, high operating costs and low efficiency, the scope of application is greatly limited, the application effect is not obvious, and promotion is difficult.

Therefore, it will be of great significance to establish a system with simple operation, low operating cost, effective collection of rainwater and plant purification and treatment of rainwater.

Contents of the invention

The purpose of the present invention is to establish an urban rainwater collection and purification treatment system, improve the utilization rate of rainwater, and realize the purpose of rainwater control and effective utilization.

The technical scheme of the present invention is realized like this: the present invention comprises two parts of the rainwater collecting system of urban road and the rain pond purification system, a green belt is set on the sidewalk towards the roadway, and a green space is set on the side facing away from the roadway, The filter rainwater outlet is set in the green belt, and the overflow rainwater outlet is set in the green space. The filter rainwater outlet and the overflow rainwater outlet are connected to the rainwater pipe of the road through pipelines. The inspection well is set on the rainwater pipe, and the rainwater is collected through the filter rainwater outlet and the overflow rainwater outlet. The rainwater pipe is discharged into the rainwater pond purification system; the rainwater pipe is connected to the water inlet of the rainwater pond purification system, and the collected rainwater passes through the sedimentation tank, front grille, front pond, overflow weir, seepage storage area, rear grille and Aquatic plants are installed in the water outlet, front pond and seepage storage area, and erosion-resistant plants are installed on the bank; the purified rainwater discharged through the water outlet is used as a class IV or class V water body function in the "Surface Water Environmental Quality Standards" use.

The diameter of the overflow rainwater outlet is 100-800mm, the spacing is 10-30m, and the height is 50-150mm above the ground. A filter cover is provided on the upper opening, and filter holes with an aperture of 3-6mm are arranged on the filter cover, and the hole spacing is 2-15mm. 4mm.

The distance between the filtering rainwater outlets is 10-30m, and the part above the ground is set such that the diameter of the upper opening is greater than the diameter of the lower opening, the diameter of the lower opening is 100-300mm, and the diameter of the upper opening is 150-500mm.

The sidewalk is a permeable pavement, which is one of permeable concrete pavement, permeable asphalt pavement and permeable brick pavement.

The grid gap width of the front grid is 5-15mm, the grid gap width of the rear grid is 3-6mm, and the rear grid is outsourced with a filter screen with an aperture of 1-2mm.

The erosion-resistant plants are one or more of Bagengrass, Rhizoma Cyperi, Tall Leymus, Zoysia and Bluegrass, and the planting width is 2.0-4.0m.

The aquatic plants are one or more of reeds, cattails, lotus, water lilies, quinces and juniper.

The thickness of the planting soil for the erosion-resistant plants is 300-600 mm, and the planting soil is prepared by mixing soil, peat soil and plant debris. The preparation method is to add peat soil with a weight ratio of 8-20% and 5-20 % of plant debris, the soil is made of silty clay, and the peat soil is prepared by anaerobic fermentation of sedimentation tank sedimentation sludge and crushed plant straw. The plant straw is anaerobically fermented for 12-20 days.

The overflow weir is piled with rubble, the stacking height is 500-1000mm lower than the bank, the diameter or side length of the rubble is 100-500mm, and the voids of the piled rubble are filled with gravel, and the diameter of the filled gravel is 20-50mm. 50mm.

The positive effect of the present invention is to improve the rainwater purification ability and rainwater utilization rate through sedimentation, two absorption and two filtrations. The present invention has extensive materials, simple method, convenient maintenance and remarkable environmental benefits.

Description of drawings

Fig. 1 is a schematic diagram of the planar structure of the rainwater collection system of the present invention;

Fig. 2 is the sectional structure schematic diagram of rainwater collecting system of the present invention;

Fig. 3 is a schematic plan view of the rainwater pond purification system of the present invention.

In the figure 1. Overflow stormwater outlet, 2. Green space, 3. Sidewalk, 4. Green belt, 5. Filter stormwater outlet, 6. Inspection well, 7. Rainwater pipe, 8. Roadway, 9. Water inlet, 10. Sedimentation tank, 11. Front grille, 12. Front pond, 13. Scour-resistant plants, 14. Aquatic plants, 15. Overflow weir, 16. Seepage storage area, 17. Rear grille, 18. Outlet , 19. Ground.

detailed description

Below in conjunction with accompanying drawing, the present invention will be further described

Embodiment 1, as shown in Figure 1, Figure 2 and Figure 3, a green belt 4 and a green space 2 are arranged on both sides of the sidewalk 3, and the rainwater passes through the filter rainwater outlet 5 in the green belt 4 and the overflow rainwater outlet 1 in the green belt 2 Drain into the rainwater pipe 7, the upper part of the rainwater pipe 7 is equipped with an inspection well 6, the rainwater pipe 7 is connected with the water inlet 9 of the rainwater pond purification system, and the collected rainwater passes through the sedimentation tank 10, the front grille 11, the front pond 12, and the overflow weir 15 in sequence , seepage storage area 16, rear grid 17 and water outlet 18, aquatic plants 14 are set in the front pond 12 and seepage storage area 16, and erosion-resistant plants 13 are set on the bank; the purified rainwater is discharged through the water outlet, Sprinkle water as city roads.

The overflow rainwater outlet 1 has a diameter of 100mm, a distance of 10m, and is 50mm above the ground. A filter cover is provided on the upper opening, and filter holes with a diameter of 3mm are arranged on the filter cover, and the hole spacing is 2mm; the distance between the filter rainwater outlets is 10m, which is higher than The diameter of the lower opening is 100mm and the diameter of the upper opening is 150mm in the part above the ground; the sidewalk 3 is a permeable pavement, which adopts a permeable concrete pavement.

The grid gap width of the front grid 11 is 5mm, the grid gap width of the rear grid 17 is 3mm, the rear grid 17 is outsourced with a filter screen, and the filter screen aperture is 1mm.

The scour-resistant plant 13 adopts barkgrass with a planting width of 2.0m, the aquatic plant 14 uses reeds and cattails, and the overflow weir 15 is piled with rubble, the height of which is 500mm lower than the bank, and the diameter or side length of the rubble is 100~ 500mm, the gaps of piled rubble are filled with crushed stones, and the diameter of the filled crushed stones is 20~50mm.

The thickness of the planting soil of the erosion-resistant plant 13 is 300mm, and the planting soil is prepared by mixing soil, peat soil and plant debris. The preparation method is to add peat soil and 5% plant debris in the weight ratio to the soil, and the soil adopts The silty clay and peat soil are prepared by anaerobic fermentation of sedimentation tank 10 and crushed plant straw mixed by anaerobic fermentation for 12 days by adding 15% of crushed plant straw less than 15 mm long to the sedimentation bottom mud.

Embodiment 2, as shown in Figures 1 to 3, a rainwater collection system and a rainwater pond purification system are set, wherein the overflow rainwater outlet 1 has a diameter of 800mm, a distance of 30m, and a height of 150mm above the ground. Filter holes with an aperture of 6mm are set on the top, and the hole spacing is 4mm; the distance between the filter rainwater outlets 5 is 30m, the diameter of the lower opening above the ground is 300mm, and the diameter of the upper opening is 500mm; the sidewalk 3 is a permeable pavement, using permeable bricks pavement.

The grid gap width of the front grid 11 is 15mm, the grid gap width of the rear grid 17 is 6mm, and the rear grid 17 is outsourced with a filter screen with a filter screen aperture of 2mm.

The scour-resistant plants 13 are barkgrass and zoysia with a planting width of 4.0m, and the aquatic plants 14 are reeds and water lilies.

The overflow weir 15 is piled with rubble, the height of the pile is 1000mm lower than the bank, the diameter or side length of the rubble is 100-500mm, and the voids of the piled rubble are filled with gravel, and the diameter of the filled gravel is 20-50mm.

The thickness of the planting soil for erosion-resistant plants 13 is 600mm. The planting soil preparation method is to add 20% peat soil and 20% plant debris in the soil by weight. The soil adopts silty clay. Add 30% of crushed plant straws less than 15 mm in length to the sediment sediment of 10 for anaerobic fermentation for 20 days.

Embodiment 3, as shown in Figures 1 to 3, a rainwater collection system and a rainwater pond purification system are set, wherein the overflow rainwater outlet 1 has a diameter of 500mm, a distance of 20m, and a height of 100mm above the ground. Filter holes with a diameter of 5mm are set on the top, and the hole spacing is 3mm; the distance between the filter rainwater outlets 5 is 20m, the diameter of the lower opening above the ground is 200mm, and the diameter of the upper opening is 400mm; the sidewalk 3 is a permeable pavement, using permeable asphalt pavement.

The grid bar gap width of the front grid 11 is 10mm, the grid bar gap width of the rear grid 17 is 5mm, and the rear grid 17 is outsourced with a filter screen with a filter screen aperture of 1mm.

The erosion-resistant plants 13 are bacon grass and bluegrass with a planting width of 3.0m, and the aquatic plants 14 are cattails and water lilies.

The overflow weir 15 is piled with rubble, the height of the pile is 800mm lower than the bank, the diameter or side length of the rubble is 100-500mm, and the voids of the piled rubble are filled with gravel, and the diameter of the filled gravel is 20-50mm.

The thickness of the planting soil of the erosion-resistant plant 13 is 400mm, and the preparation method of the planting soil is to add 12% peat soil and 10% plant debris in the soil by weight ratio, and the soil adopts silty clay, and the peat soil preparation method is Add 20% of crushed plant stalks less than 15mm in length to the settled bottom mud in pond 10 for anaerobic fermentation for 15 days.

Claims (6)

1. the urban rainwater collection of northern area and a cleaning system, is characterized in that including the rain water collecting system of urban road With rainpool cleaning system two parts, in footpath (3), greenbelt (4), driveway dorsad are set to driveway (8) side (8) side arranges greenery patches (2), arranges filtration inlet for stom water (5), arrange overflowing rain water mouth (1), mistake in greenery patches (2) in greenbelt (4) Filter inlet for stom water (5) is connected with the rain pipe (7) of road by pipeline with overflowing rain water mouth (1), and rain pipe arranges inspection shaft on (7) (6), rainwater enters rainpool cleaning system in collecting rain pipe (7) by filtration inlet for stom water (5) and overflowing rain water mouth (1), Rain pipe (7) is connected with the water inlet (9) of rainpool cleaning system, and the rainwater of collection passes sequentially through sedimentation tank (10), prepositional case Grid (11), the preposition pool (12), downflow weir (15), Xu Shen district (16), rearmounted grid (17) and outlet (18), the preposition pool (12) and Arranging water plant (14) in Xu Shen district (16), bank arranges resistance to erosion plant (13).

Urban rainwater collection the most according to claim 1 and cleaning system, is characterized in that overflowing rain water mouth (1) is a diameter of 100 ~ 800mm, spacing is 10 ~ 30m, and be above the ground level 50 ~ 150mm, the filtering cover that arranges suitable for reading, filtering cover is arranged aperture be 3 ~ The filtering holes of 6mm, pitch of holes is 2 ~ 4mm.

Urban rainwater collection the most according to claim 1 and cleaning system, is characterized in that filtering inlet for stom water (5) spacing is 10 ~ 30m, (19) above section that is above the ground level is set to back cut diameter and is more than lower port diameter, and lower port diameter is 100 ~ 300mm, suitable for reading A diameter of 150 ~ 500mm, footpath (3) is permeable pavement road surface.

The grizzly bar gap width of the most preposition grid (11) is 5 ~ 15mm, between rearmounted grid (17) grizzly bar Gap length degree is 3 ~ 6mm, rearmounted grid (17) outsourcing filter screen, and aperture of filter screen is 1 ~ 2mm.

Urban rainwater collection the most according to claim 1 and cleaning system, is characterized in that resistance to erosion plant (13) uses bar One or more in root grass, Rhizoma Cyperi, high Leymus chinensis (Trin.) Tzvel., Korea lawn grass and annual bluegrass, its plantation width is 2.0 ~ 4.0m, water plant (14) one or more in phragmites communis, Herba Typhae, Flos Nelumbinis, Flos nymphaeae (Nymphaea teragona Georgi), Herba Lythri Salicariae and spatterdock, the plantation of resistance to erosion plant (13) are used Soil thickness is 300 ~ 600mm, and planting soil is that soil, peat soil and canebreak are mixed with, and preparation method is for add in soil Entering peat soil and the canebreak of 5 ~ 20% that weight ratio is 8 ~ 20%, soil uses silty clay, and peat soil uses sedimentation tank (10) prepared by the straw hybrid anaerobic fermentation of precipitation bed mud and pulverizing, and preparation method is to add 15 ~ 30% in precipitation bed mud Pulverize the straw anaerobic fermentation 12 ~ 20 days less than 15mm length.

Urban rainwater collection the most according to claim 1 and cleaning system, is characterized in that downflow weir (15) uses rubble Building, pile up height and be less than bank 500 ~ 1000mm, rubble diameter or the length of side are 100 ~ 500mm, fill in the rubble space piled up Rubble, the stone sizes of filling is 20 ~ 50mm.