氯胺消毒饮用水中消毒剂分解途径与预测模型构建  

Decomposition Pathway and Prediction Model Construction of Disinfectant in Chloramine Disinfection of Drinking Water

作　　者：马凯[1,2] 贾霞珍 赵林 胡建坤[2] 韩宏大 MA Kai;JIA Xia‑zhen;ZHAO Lin;HU Jian‑kun;HAN Hong‑da(School of Environmental Science and Engineering,Tianjin University,Tianjin 300350,China;Tianjin Water Group Co.Ltd.,Tianjin 300042,China)

机构地区：[1]天津大学环境科学与工程学院,天津300350 [2]天津水务集团有限公司,天津300042

出　　处：《中国给水排水》2023年第21期34-39,共6页China Water & Wastewater

摘　　要：采用水质模型预测管网水余氯值是管网水质管控的重要手段之一。基于前期开发的总氯胺衰减模型(TCDM),耦合自由氯分解反应模块开发得到了优化的总氯胺衰减模型(RTCDM)。同时,分别以南水北调原水、水厂出厂水、管网水为实验用水,研究不同条件下主体水的余氯衰减过程。对相同初始条件下RTCDM模型的预测结果与实验结果进行比较,发现RTCDM模型能够高精度再现实验测定值,各组实验的平均相对误差为0.2%~9%,该模型同时具有良好的实验条件敏感性。因此,对于氯胺消毒给水系统,不宜单纯考虑氯胺的分解过程,还应将水中存在的自由氯分解过程纳入衰减反应体系中,从而提高模型应用能力。The application of water quality model in prediction of residual chlorine of pipe network is one of the important means for water quality control.Based on the previously developed total chlorine decay model(TCDM),a refined total chlorine decay model(RTCDM)was developed by coupling the free chlorine decomposition reaction module.In addition,the residual chlorine decay process of raw water from South‑to‑North Water Diversion Project,effluent from water treatment plant and pipe network water were investigated under different experimental conditions.The prediction results of RTCDM were compared with the experimental results under the same initial conditions,which indicated that the RTCDM was capable of predicting the experimental results with high accuracy.The mean relative error of each experiment was in the range of 0.2%-9%,and the model had good sensitivity to experimental conditions.Consequently,for chloramine disinfection water supply system,it is not appropriate to consider the decomposition process of chloramine alone,and the free chlorine decomposition process existing in water should be included in the chloramine decay reactions,so as to improve the adaptive capacity of the model.

关 键 词：水质预测模型 余氯衰减 总氯胺衰减模型 反应动力学 

分 类 号：TU991[建筑科学—市政工程]