CAJ | 학술논문

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.
통과재실험실탑건소형관망,모의료자래수급해수담화수재이유시정관망중적수배과정,병선취pH、감도、Langelier포화지수화Ryznar지수작위공제지표래평개기화학은정성.결과표명,해수담화수적감도겁저,구유불포화성(Langelier포화지수위-3.25)화강부식경향(Ryznar지수위13.92),즉화학불은정성,진입기유관망후역용해원선적존적관구,병가속금속관도내벽부식.
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.