Rainwater collecting, purifying and recycling system for sponge city planning and construction

Abstract

The invention provides a rainwater collecting, purifying and recycling system for sponge city planning and construction. The system comprises a drainage ditch, a road rainwater collecting and purifying area, a roof rainwater collecting and purifying area and a greenbelt rainwater collecting and purifying area, wherein the drainage ditch is provided with a sewage pipe connected to a water collecting pipe, rainwater in the road rainwater collecting and purifying area, the roof rainwater collecting and purifying area and the greenbelt rainwater collecting and purifying area flows into the water collecting pipe through a municipal pipe network, the water collecting pipe is connected to a primary purifying module, a secondary purifying module, an acid-base adjusting module, an aeration module,a photocatalysis module and a reservoir which are connected through pipelines are sequentially arranged behind the primary purifying module, and water in the reservoir is introduced into a municipal water area, a household water area and a garden irrigation area for use through a drainage pipe and a water pump. According to the system, urban rainwater is collected and purified in multiple directions, urban rainfall flood pressure is effectively relieved, the rainwater utilization efficiency is improved, water resources are saved, meanwhile, pollutants in water can be absorbed, and the urban non-point source pollution problem is relieved.

Description

technical field [0001] The invention belongs to the technical field of sponge city construction and rainwater resource utilization, and in particular relates to a rainwater collection, purification and reuse system oriented to sponge city planning and construction. Background technique [0002] my country is a country seriously short of water resources. According to statistics, more than 50% of the cities in the country are short of water, and nearly 20% of the cities are seriously short of water. In recent years, with the rapid development of urbanization, the area of ​​urban green space has gradually decreased, and most of the green spaces, wetlands, ditches and other areas that originally had the function of water conservation have evolved into hardened ground. The drainage of the pipe network has caused frequent waterlogging disasters and serious runoff pollution; but after the heavy rain, it has fallen into the dilemma of dryness and water shortage, and the heat island ...

AI Technical Summary

Problems solved by technology

[0004] There are many deficiencies in conventional rainwater harvesting and utilization: conventional rainwater utilization technologies generally have a single function, such as rainwater collection, rainwater purification and other functions, without a good connection between various comprehensive functions, and without consideration of comprehensive intelligent management, the system does not operate well. Stable, cannot make full use of rainwater resources; natural rainwater often carries a large amount of domestic garbage and pollutants on the ground, and the unpurified rainwater is discharged into the natural environment, which will aggravate the pollution of natural water bodies; when encountering heavy rain, it will As a result, the urban surface runoff has increased significantly, and the flood discharge capacity of the municipal pipe network is far from sufficient, causing road floods and waterlogging; conventional rainwater purification systems often do not consider the purification process from the time of collecting rainwater, resulting in high purification costs and low purification efficiency

[0005] In summary, the current rainwater collection and utilization system can no longer meet the needs of sponge city construction. Therefore, it is necessary to combine the concepts of natural accumulation, natural infiltration and natural purification of sponge city to develop a system that can not only green and beautify the urban environment, but also It can also relieve the pressure of urban rain and flood, absorb pollutants in rainwater, and realize the rainwater collection, purification and reuse system with comprehensive functions in order to realize the energy-saving utilization of rainwater in sponge cities and the control of urban non-point source pollution.

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