CN203256980U - Roof rainwater collection and resource utilization system - Google Patents

Abstract

The utility model discloses a roof rainwater collection and resource utilization system, which comprises a green roof system and a rainwater collection system; root layer, storage and drainage layer, filter layer, lightweight filler layer, planting soil layer and vegetation layer; the lightweight filler layer is a mixed layer of perlite and vermiculite; the storage and drainage layer is a lightweight storage and drainage board. The rainwater is treated by the green roof system and stored in the reservoir, and then pumped to the outdoor green space or landscape facilities by the water pump. The utility model can purify the air and beautify the environment. Compared with the prior art, the investment cost is low, the economic benefit is high, and the environmental and social benefits are improved.

Description

Roof rainwater collection and resource utilization system

technical field

The utility model belongs to the field of urban water supply and drainage, and in particular relates to the application of green roofs and a roof rainwater collection and utilization system.

Background technique

With the development of society and the increase of population, the contradiction between the increase of demand for water resources and the shortage of water resources in our country is increasing day by day. Therefore, it is very important to make full use of all available water resources to improve the situation of water resources in our country. Existing studies have shown that the water quality of roof rainwater is relatively clean and can be directly used after simple treatment. The traditional roof rainwater utilization process is: roof rainwater collection→initial waste flow device→regulation pond→rainwater treatment device→clean water pond→greening use, groundwater recharge, etc. The problems faced by the utilization of roof rainwater are: the initial waste flow device must be installed and the investment cost is relatively high. The application of green roofs can not only reduce rainwater runoff and reduce flood peaks, but also purify water quality and play a certain role in pretreatment. At the same time, it also has ecological effects such as purifying air and beautifying the environment. The utility model aims to add a specific and improved green roof system to the traditional rainwater utilization process, and proposes a new utilization process according to the later utilization purpose: green roof→rainwater collection→reservoir→directly used for greening, etc. Thereby eliminating the initial waste flow, treatment and other devices, greatly reducing the size of the structure, and can purify the air and beautify the environment. Therefore, the utility model has considerable economic benefits, environmental and social benefits, and has positive significance in roof rainwater collection and resource utilization.

Contents of the invention

The purpose of this utility model is to optimize the roof rainwater utilization process and provide a roof rainwater collection and resource utilization system that can purify the air, beautify the environment, have low investment costs, high economic benefits, and improve environmental and social benefits.

The utility model is realized through the following technical solutions:

A roof rainwater collection and resource utilization system, including a green roof system and a rainwater collection system composed of a vegetation layer, a planting layer, a storage and drainage layer and a roof structure layer; it is characterized in that the bottom layer of the green roof system is Roof structure layer 1, on top of the roof structure layer 1, a waterproof layer 2, a root separation layer 3, a storage and drainage layer 4, a filter layer 5, a lightweight filler layer 6, a planting soil layer 7 and a vegetation layer 8 are sequentially arranged on top of the roof structure layer 1; The light filler layer 6 is a mixed layer with a volume ratio of perlite and vermiculite of 2:1; the storage and drainage layer 4 is a light storage and drainage board; the filter layer 5 is a non-woven fabric structure;

The vegetation layer 8 of the green roof system is planted with Sage grass; on both sides of the green roof system, an overflow pipe A9 is set at 1 cm above the planting soil layer 7, and a drain pipe 10 is set at the storage and drainage layer 4;

The rainwater collection system is connected with the green roof system through the gutter 15, the rainwater passes through the gutter 15, and then enters the reservoir 12 through the rainwater collection pipe 11; An overflow pipe B14 is provided, and a water pump 13 is provided beside the reservoir 12, through which the rainwater collected by the reservoir 12 is pumped to outdoor green space or landscape facilities.

The material of the waterproof layer 2 is polyether polyurethane waterproof blanket.

The material of the root-separating layer 3 is T-99 anti-root paint.

The planting soil layer 7 is porous clay.

The thicknesses of the waterproof layer 2, the root-separating layer 3, the storage and drainage layer 4, the filter layer 5, the lightweight filler layer 6 and the planting soil layer 7 are 1.2mm, 0.2mm, 25mm, 1mm, 100mm, and 70mm, respectively.

Through the above technical proposal, the utility model realizes the optimization of roof rainwater utilization process, reduces investment, improves economic benefits, increases urban greening area, purifies air, beautifies environment, and improves environmental and social benefits. The beneficial effects of the utility model are as follows:

1. Compared with the existing technology, the green roof system adds light filler layers of perlite and vermiculite structure, and selects light storage and drainage boards to replace commonly used pebbles and block stones, which not only enhances the purification effect of green roofs on water quality , and will not cause major changes in the weight and height of the green roof.

2. Compared with the existing technology, devices such as initial rainwater abandonment and rainwater treatment are omitted, and the quality of the effluent water after the rainwater passes through the green roof is better; the green roof can collect rainwater and reduce runoff, so the size of the storage tank is greatly reduced It is small, about 1/3 of the ordinary roof, and produces considerable economic benefits.

3. Green roofs can not only increase the green area of the city, but also protect the roof materials from erosion, purify the air, beautify the environment, improve the comprehensive utilization effect of buildings, and further increase environmental and social benefits.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the greening roof system of the present utility model;

Fig. 2 is a structural schematic diagram of the utility model applied to a roof rainwater collection and resource utilization system of a building.

The utility model reference sign is as follows:

1——Roof structure layer 2——Waterproof layer

3——root layer 4——storage and drainage layer

5——filter layer 6——light packing layer

7——planting soil layer 8——vegetation layer

9——Overflow pipe A 10——Drain pipe

11——Rainwater collection pipe 12——Reservoir

13——Water pump 14——Overflow pipe B

15——Eaves

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

The technical scheme of the utility model consists of two parts: a green roof system and a rainwater collection system.

1. Green roof system

The green roof system is a grass planting system installed on the roof. Its bottom layer is the roof structure layer 1, and the top of the roof structure layer 1 is sequentially provided with a waterproof layer 2, a root layer 3, a storage and drainage layer 4, and a filtration layer. Layer 5, light filler layer 6, planting soil layer 7 and vegetation layer 8; the light filler layer 6 is a mixed layer with a volume ratio of perlite and vermiculite of 2:1; the storage and drainage layer 4 is a light Mass storage drainage board; the filter layer 5 is a non-woven fabric structure;

The vegetation layer 8 and the planting soil layer 7 intercept and utilize rainwater, and the lightweight filler layer 6 can effectively regulate rainwater runoff and purify the quality of rainwater. Existing studies have shown that the runoff coefficient of ordinary roofs is about 0.9, while the runoff coefficient of green roofs can be reduced to about 0.3, which greatly reduces the amount of rainwater runoff; at the same time, green roofs can also be reduced by internal interception, adsorption, and filtration Pollutants in rainwater, the removal rate of COD _cr can reach more than 50%, and the green roof can 100% eliminate the pollution of rainwater caused by roofing materials.

The vegetation layer 8 of the greening roof system is selected from Sageria grass with strong growth adaptability, the planting soil layer 7 is porous clay; the filter layer 5 is made of non-woven fabric; the waterproof layer 2 is polyether polyurethane waterproof blanket; the root layer 3 is T -99 anti-root coating, its function is to prevent the root system of the upper layer of plants from causing damage to the building.

The thicknesses of the waterproof layer 2, the root-separating layer 3, the storage and drainage layer 4, the filter layer 5, the lightweight filler layer 6 and the planting soil layer 7 are 1.2mm, 0.2mm, 25mm, 1mm, 100mm, and 70mm, respectively.

Greening roof system is the core part of the utility model, the purpose of this part is to carry out pretreatment to rainwater, purify water quality as far as possible; Add light filler layer 6 between planting soil layer 7 and filter layer 5, light filler layer The structure of 6 is perlite and vermiculite, and its volume ratio is 2:1; the lightweight packing layer 6 has the characteristics of low density and large porosity, when rainwater passes through the light packing layer 6, the packing can intercept and absorb the rainwater Impurities reduce the burden on the filter layer 5, while the lightweight filler layer 6 can also store a part of rainwater to supply moisture to the vegetation layer 8. The storage and drainage layer 4 of the green roof system uses lightweight storage and drainage boards to replace the previous pebbles and block stones, which reduces the weight and height of the green roof system.

2. Rainwater collection system

The roof rainwater collection system of the present utility model is an external collection system, which is connected with the green roof system through the gutter 15, and the rainwater passes through the gutter 15, and then enters the reservoir 12 through the rainwater collection pipe 11; before the rainy season, especially Pay attention to the cleaning of the gutter 15 and the reservoir 12 to ensure the rainwater quality of the first rainfall. The water storage tank 12 is arranged on the lowest floor of the building, and an overflow pipe B14 is arranged on its upper part, and a water pump 13 is arranged beside the water storage tank 12, through which the rainwater collected by the water storage tank 12 is pumped to the outdoor green space or replenishes the landscape Facility water.

The research results show that the green roof system has obvious removal effects on SS (suspended solids), COD (chemical oxygen demand), TN (total nitrogen) and TP (total phosphorus) in rainwater, and the removal rates can reach 80%~ 90%, 50%-70%, 50%-70% and 40%-70%, the effluent water quality of the green roof system can meet the requirements of "Urban Sewage Recycling and Utilization of Urban Miscellaneous Water Quality" (GB/T18920-2002). Therefore, through the roof rainwater collection and resource utilization system of the present utility model, the quality of collected rainwater can meet the requirements of greening and landscape water use.

Claims (5)

1. A roof rainwater collection and resource utilization system, including a green roof system and a rainwater collection system composed of a vegetation layer, a planting layer, a storage and drainage layer and a roof structure layer; it is characterized in that the most of the green roof system The bottom layer is the roof structure layer (1), and the top of the roof structure layer (1) is sequentially provided with a waterproof layer (2), a root separation layer (3), a storage and drainage layer (4), a filter layer (5), a light quality filler layer (6), planting soil layer (7) and vegetation layer (8); the described storage and drainage layer (4) is a lightweight storage and drainage board; the filter layer (5) is a non-woven fabric structure; An overflow pipe A (9) is arranged at 1 cm above the planting soil layer (7) on both sides of the green roof system, and a drainage pipe (10) is arranged on the storage and drainage layer (4); The rainwater collection system is connected with the green roof system through the gutter (15), and the rainwater passes through the gutter (15), and then enters the reservoir (12) through the rainwater collection pipe (11); the reservoir (12) is arranged in the building The lowermost layer, the upper part of the reservoir (12) is provided with an overflow pipe B (14), and a water pump (13) is arranged next to the reservoir (12), and the water collected by the reservoir (12) is collected by the pump (13). Rainwater is pumped to outdoor green space or landscape facilities. the 2. The roof rainwater collection and resource utilization system according to claim 1, characterized in that, the material of the waterproof layer (2) is a polyether polyurethane waterproof blanket. the 3. The roof rainwater collection and resource utilization system according to claim 1, characterized in that, the material of the root-separating layer (3) is T-99 anti-root coating. the 4. The roof rainwater collection and resource utilization system according to claim 1, characterized in that, the planting soil layer (7) is porous clay. the 5. The roof rainwater collection and resource utilization system according to claim 1, characterized in that, the waterproof layer (2), the root layer (3), the storage and drainage layer (4), the filter layer (5), the lightweight The thicknesses of the filler layer (6) and the planting soil layer (7) are 1.2mm, 0.2mm, 25mm, 1mm, 100mm, and 70mm respectively. the

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