城市供水系统的水质化学稳定性变化规律研究

Research on Change Regularity of Water Chemical Stability in Urban Water Supply Systems

提出了适合我国城市供水系统的水质化学稳定性评价体系,重点研究了水处理及输配过程中水质化学稳定性的变化规律。研究发现,混凝沉淀、过滤、消毒等工艺均会增加水的腐蚀倾向,而投加臭氧则可缓解其腐蚀倾向;在输配过程中,管网水的化学稳定性变化不大,因而改善管网水水质化学稳定性的关键是提高出厂水的化学稳定性。

An evaluation system for the water chemical stability within urban water supply systems in China was proposed. The change regularity of water chemical stability during the water treatment and distribution process was studied mainly. Research results show that coagulation, sedimentation, filtration, and disinfection techniques can enhance corrosion of water, whereas ozonization can relieve the corrosion phenomenon. During the water distribution process, changes in water chemical stability are not apparent in the pipe networks. Therefore, the key of improving the water chemical stability in the pipe networks is improving the chemical stability of treated water.