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为降低淡化海水对供水管网的腐蚀性,研究了淡化海水Cl~-含量、pH与碱度、硬度以及与自来水的掺混比对管网腐蚀性和出水水质的影响。结果表明,控制淡化海水Cl~-的质量浓度为130 mg/L左右,然后加入NaHCO_3调节碱度为80 mg/L(pH增大到8.5),加入CaCl_2调节硬度为80 mg/L左右对淡化海水进行调质,最后将自来水与调质后的淡化海水掺混,掺混体积比优选3.0~3.5,可满足输水管网水质稳定性,不会引起总铁、浊度、色度大的变化,且符合GB 5749-2006要求。
In order to reduce the corrosiveness of desalinated seawater on the water supply network, the influence of desalinated seawater on Cl ~ - content, pH and alkalinity, hardness and mixing ratio of tap water on pipeline corrosion and effluent quality was studied. The results showed that the concentration of Cl ~ - controlling desalinated seawater was about 130 mg / L, then adding NaHCO 3 to adjust the alkalinity to 80 mg / L (pH increased to 8.5), adding CaCl 2 to adjust the hardness to about 80 mg / L, Seawater for quenching and tempering, and finally mixing the tap water and the desalinated seawater after the quenching and tempering, with the mixing volume ratio being preferably 3.0-3.5, which can meet the water quality stability of the water delivery network and can not cause total iron, turbidity and large chromaticity Change, and meet the requirements of GB 5749-2006.