Urban water supply&drainage

The urban drainage system is an engineering facility system that treats and drains urban sewage and rainwater, and is an integral part of urban public facilities. Urban drainage system planning is an integral part of the overall urban design. The urban drainage system usually consists of drainage pipes and sewage treatment plants. In the case of processing the sewage and rainwater diversion system, the sewage is collected by the drainage pipe and sent to the sewage treatment before being discharged into the water body or recycled; the rainwater is collected by the drainage pipe and discharged into the nearby water body.

The drainage method of collecting, transporting, processing and discharging urban sewage and rainwater by the city.

The goal of urban drainage system is to make the sewage and rainwater of the whole city drain out smoothly, to treat the sewage well, and to meet the requirements of environmental protection. The main contents of the plan include: estimating urban drainage, selecting drainage systems, designing drainage pipelines, determining sewage treatment methods and the location of urban sewage treatment plants, etc.

Drainage system is an important infrastructure of a modern city. How to economically and technically optimize the design and rebuild and expand the urban drainage system is an important research topic. In the construction of municipal projects and environmental treatment projects, the drainage system often occupies a relatively large proportion of investment. Kitzm valve has rich experience in design for the city water system. How to rationally design urban drainage systems under various technical requirements is an important issue in planning and design. In response to this, the government has issued urban drainage permit management measures to solve such problems.

Drainage channels are generally divided into several levels, such as principle ditch, main ditch, and branch ditch. When the drainage area is large or the terrain is complicated, the number of drainage channels can be appropriately increased. It is mainly used for drainage, and sometimes also plays a role in water storage and stagnation. Normally, open ditch is used to drain waterlogged (flooded) water into the drainage area by gravity. However, in some areas, the water level of the outer river during the flood season is higher than the water level of the channel in the drainage area, and the waterlogged water cannot be discharged by itself, and pumping stations must be set up for drainage. In order to save drainage costs and energy, the lakes and depressions in the drainage area should also be used as much as possible to store part of the waterlogged water.

Main function

1. From the perspective of environmental protection, drainage works have the effect of protecting and improving the environment and eliminating sewage hazards. Eliminating pollution and protecting the environment is an indispensable condition for economic construction, and it is a major task to protect the health of the people and benefit future generations.

2. From the perspective of sanitation, the construction of drainage projects has far-reaching significance for protecting people's health.

3. From an economic point of view, first of all, water is a very precious natural resource, and it is indispensable in all sectors of the national economy. Secondly, the proper treatment of sewage and the timely removal of rain and snow are one of the necessary conditions to ensure the normal operation of industry and agriculture. At the same time, whether wastewater can be properly treated has an important impact on the development of new industrial production processes.

4. Sewage itself also has great economic value. For example, the recovery of valuable raw materials in industrial wastewater not only eliminates pollution, but also creates wealth for the country and reduces product costs.