XIANGFan,MA Zong-kai,QIU Bin-bin.Design Key Points of Pipe Network Extension for Integration of Urban and Rural Water Supply in County[J].China Water & Wastewater,2024,40(22):47-52.
Design Key Points of Pipe Network Extension for Integration of Urban and Rural Water Supply in County
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第22期
Page:
47-52
Column:
Date of publication:
2024-11-17
- Keywords:
- urban and rural water supply; water supply pipe network extension; design peak flow; residual chlorine; integrated pumping station
- Abstract:
- The extension of urban water supply pipe network to rural areas is one of the important means to achieve integration of urban and rural water supply. The significant differences in water usage patterns between rural and urban residents and the expansion of the water supply area have brought about new challenges in determining pipeline flow rates, maintaining residual chlorine in pipelines, and water pressure guarantees for the design of pipeline extensions. Taking the rural-urban integrated water supply pipe network extension project in Country A as an example, this paper discusses the key design points in the design of the network extension from three aspects: water volume determination, residual chlorine maintenance, and water pressure assurance, and provides corresponding solutions. For instance, this paper investigates the combined use of the maximum daily and hourly peak flow and the design peak flow in the building water supply to predict the pipeline design flow. It also proposes the use of a chlorine decay kinetics formula to judge the chlorine consumption pattern in the water supply pipe network, thereby determining the recommended residual chlorine value in finished water of waterworks and the location of supplementary chlorination facilities. Furthermore, it clarifies the use of small water tanks and integrated pumping stations to address insufficient water pressure at the endpoints of a pipeline, and suggests the installation of pressure-reducing valves to ensure the safety of pipelines and sanitary appliances when the static water pressure exceeds 60 meters.
Last Update:
2024-11-17