ZHANGWen-wen,HEMiao,XUChang-li,et al.Analysis of Yellowing Substances and Their Control in Water Supply Network System[J].China Water & Wastewater,2022,38(13):36-41.
Analysis of Yellowing Substances and Their Control in Water Supply Network System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第13期
Page:
36-41
Column:
Date of publication:
2022-07-01
- Keywords:
- water supply network system; yellowing substances; pipeline corrosion; hydraulic model; emergency dispatch
- Abstract:
- To determine how to effectively control the fluctuation of water quality when the pressure of water supply network changes, the water quality was monitored online in pipelines with different ages and pressure distribution, and water quality fluctuation was found to be easy to occur in pipelines with old water age and pipe age by taking the frequency of water quality fluctuation as the evaluation index. The composition and mechanism of corrosion in gray iron and ductile iron pipes with different ages were investigated. After 15 years of operation, the corrosion of gray iron pipe was more serious. The proportion of iron in the corrosion of the pipe inner wall reached 61.57%. When water pressure fluctuated or the flow was reversed, the release of iron rust was easy to cause the fluctuation of water quality. Based on the hydraulic model estimate, the head loss of each node in HWT area was calculated when the node flow of the pipeline changed, and the affected areas of water supply dispatching before and after the pipeline transformation were evaluated. This paper proposed an effective method to control the fluctuation of water quality in case of water pressure fluctuation and water flow reverse caused by pipeline construction, and accurately revealed the mechanism of controlling water quality stability in regional water supply network system, which laid a foundation for safe operation of the whole water supply network.
Last Update:
2022-07-01