【摘要】 通过在实验室搭建小型管网,模拟了自来水及海水淡化水在已有市政管网中的输配过程,并选取pH、碱度、Langelier饱和指数和Ryznar指数作为控制指标来评价其化学稳定性。结果表明,海水淡化水的碱度极低,具有不饱和性(Langelier饱和指数为-3.25)和强腐蚀倾向(Ryznar指数为13.92),即化学不稳定性,进入既有管网后易溶解原先积存的管垢,并加速金属管道内壁腐蚀。更多还原

【Abstract】 In the laboratory,a small-scale pipe network was set up to simulate the distribution process of tap water and desalinated seawater in existing municipal pipe networks. The pH,alkalinity,Langelier saturation index and Ryznar index were chosen as the evaluation indexes of chemical instability. The results show that the desalinated seawater is chemically instable,since its alkalinity is much lower than the tape water,and it is non-saturated (Langelier saturation index of -3.25) and strong corrosive (Ryznar index of 13.92). The accumulated pipe scale is easily dissolved and the corrosion of the inner pipe wall is accelerated when the desalinated seawater enters the existing water distribution systems.更多还原