城乡统筹供水管网加氯优化及水质均匀度评价

Optimization of chlorination and water quality uniformity evaluation of integrated urban and rural water distribution system

针对城乡统筹供水模式下乡镇供水管网的特点,构建了以合格水百分比和加氯总量为优化目标的供水管网二次加氯优化模型,采用NSGA-Ⅱ算法实现该优化问题的求解,在此基础上,提出了均匀系数实现对管网中余氯均匀度的量化评价,并以苏州北部某城乡统筹供水管网为实例进行了应用。结果表明,与传统加氯相比,二次加氯能显著提高管网中合格水的百分比和水质均匀度,从整体上改善管网水质。

An optimization model for the booster chlorination specific to the urban and rural water distribution system was established. The percentage of qualified water and the total dosage of chlorine were optimized with NSGA-II algorithm method. Then uniform coefficient was proposed to evaluate the uniformity of the residual chlorine in network. The results of application the optimi- zation model to an urban and rural water distribution system in north Suzhou indicates that com- pared with the traditional chlorination, booster chlorination can significantly increase the percent- age of qualified water and water quality uniformity which improves the overall water quality in wa- ter distribution system.