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西江原水相对于置换前西部水厂原水水质有着质的飞跃。如何防止置换期间和置换后,由于水质变化对管网环境造成冲击,导致管网水质恶化,是值得关注的问题。通过对西江原水和西部原水进行腐蚀性指标分析,计算两种原水混合使用时的腐蚀情况,并通过小区管网水源置换试验,确定水源置换模式为一步置换;提出确保管网水质平稳置换的两大措施,即保持管网供水流态不变,并在置换过程中优化水厂内控指标,控制出厂水pH值在7.4～8.0,提高了水质的稳定性,也保护了供水管网。经过3个月的实践,西江原水置换后管网未出现大面积黄水浊水现象,管网水质稳定性进一步提高。
The water quality of the Xijiang River has a qualitative leap compared with that of the western waterworks before the replacement. How to prevent the replacement of the period and replacement, due to changes in water quality impact on the pipe network environment, leading to deterioration of water quality pipe network is a concern. By analyzing the corrosiveness of the raw water in the Xijiang River and the raw water in the west of China, the corrosion conditions of the two kinds of raw water mixed with each other were calculated, and the water source replacement test was conducted to determine the replacement mode of the water source as a one-step replacement. Large measures, that is, to maintain the flow of water supply pipe network unchanged, and in the replacement process to optimize the water quality control indicators, control the pH of the factory water at 7.4 ~ 8.0, improve water quality stability, but also to protect the water supply network. After 3 months of practice, the Xijiang water replaced the pipe network does not appear a large area of yellow water turbidity phenomenon, pipe network water quality stability further improved.