原水水源切换对供水管网中铁释放的影响  

Influence of Switchover of Raw Water Sources on Iron Release in Water Supply Pipelines Network

作　　者：吕东晓 张克峰[1] 宋武昌 贾瑞宝 张亚光 宋宁宁 LÜDongxiao;ZHANG Kefeng;SONG Wuchang;JIA Ruibao;ZHANG Yaguang;SONG Ningning(School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Municipal Water Supply and Drainage Water Quality Monitoring Center,Jinan 250021,China;Tongyuan Design Group Co.,Ltd.,Jinan 250101,China;Jining Zhongshan Public Water Co.,Ltd.,Jining 272000,China)

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101 [2]山东省城市供排水水质监测中心,山东济南250021 [3]同圆设计集团有限公司,山东济南250101 [4]济宁中山公用水务有限公司,山东济宁272000

出　　处：《净水技术》2021年第11期35-40,共6页Water Purification Technology

摘　　要：针对不同水质水源切换引起管道腐蚀导致管网出水水质不达标的问题,对济宁市地下水和南水北调水的水质进行了检测,利用中试管网系统探究了两水源切换及管网水中不同浓度的硫酸根、氯离子对中试管网出水总铁浓度的影响。结果表明,南水北调水水质较差,Langelier饱和指数(LSI)和Larson指数(LR)明显高于济宁市地下水,水源切换后,管网铁释放量明显升高,出水总铁含量和浑浊度无法满足标准限值。在管网铁释放的影响因素中,和碱度相比,硫酸根和氯离子含量是首要影响因素。管网出水总铁释放量与硫酸根离子和氯离子含量呈正相关性,控制硫酸根质量浓度小于150 mg/L,氯离子质量浓度小于100 mg/L,可减缓管网铁腐蚀。Water quality of the pipeline network is not complied with standard due to pipeline corrosion caused by the switchover of different water quality and water source.The water quality of groundwater in Jining City and the South-North Water Diversion was tested.Pilot test pipelines network system was used to explore the influence of the switchover of two water sources and the different concentrations of sulfate radical and chloride ions in the pipelines network water on the total iron concentration of the outflow from the pilot test pipe network.Results showed that the water quality of the South-North Water Diversion Project was poorer.Langelier saturation index(LSI)and Larson index(LR)were significantly higher than the Jining City groundwater.After the water source was switched,the iron release from the pipelines network increased significantly,and the total iron content and turbidity of the outflow could not meet standard limits.Among the influencing factors of iron release in pipelines network,compared with alkalinity,sulfate radical and chloride ion concentrations were primary influencing factors.Total iron release of pipelines network outflow was positively correlated with sulfate radical and chloride ion content.Controlling sulfate radical concentration was less than 150 mg/L and chloride ion concentration was less than 100 mg/L could slow down the iron corrosion of pipelines network.

关 键 词：供水管网 铁释放 氯离子(Cl^(-)) 硫酸根(SO^(2-)_(4)) 浑浊度 

分 类 号：TU991.38[建筑科学—市政工程]