给水管网二次加氯条件下的水质可靠度分析

Water Quality Reliability Analysis of Booster Chlorination in Water Distribution Networks

摘要:

针对给水管网二次加氯条件下的水质可靠度问题，在线性叠加理论适用的范围内，引入节点用水量权重因子，对以余氯质量浓度期望值为评价指标的可靠度评价方法进行简化和改进，提出以余氯覆盖率为评价指标的可靠度评价方法.应用理论研究成果对算例管网进行水质可靠度评价，结果表明，二次加氯能在显著降低管网加氯量和提高余氯质量浓度均匀性的基础上维持较高的水质可靠度.

Abstract:

Two different methods of water quality reliability analysis under booster chlorination were presented，namely,a simplified method based on desired chlorine residual which brought in water demand variations and used the theory of linear superposition,and a new method based on chlorine residual coverage rate.The reliability analysis of water quality under booster chlorination was carried out within a water distribution network using these two methods.The results show that booster chlorination can maintain a high reliability without impairing its advantages in allowing a lower average chlorine and decreasing the variability of chlorine residuals which lead to a lower total dosage.