智能型次氯酸钠补加氯设备在二次供水中的应用

Application of Intelligent Sodium Hypochlorite Chlorination Equipment in Secondary Water Supply

建筑二次加压供水系统中,由于存在管道或水池(箱)内水体滞留时间较长等因素,容易造成管网末梢余氯浓度不达标或微生物滋生等水质安全问题。基于此,将智能型次氯酸钠发生器用于二次供水生活饮用水补加氯,并分析了补加氯的控制方式、效果和运行成本。此系统采用高、低位水箱进口端联合补加氯方式,当水箱出口端余氯含量低于0.2 mg/L时,智能型次氯酸钠发生器根据水箱水量按需制备次氯酸钠,并进行自动稀释投加。结果表明,该设备用于二次供水系统补加氯时,控制简单,管网末梢余氯稳定,提高了供水安全性。

In building secondary pressurized water supply systems, water quality safety problems such as residual chlorine lower than the standard value at the end of pipe network or microbial breeding take place easily due to the long retention time of water in pipes or pools(tanks). Based on this, an intelligent sodium hypochlorite generator was applied to supplement chlorine to the secondary water supply drinking water, and the operational control mode, performance and operational cost of chlorination were analyzed. In this system, chlorine was supplied at the inlets of upper and lower cisterns together.When the residual chlorine at the outlet of the cistern was lower than 0.2 mg/L, the intelligent sodium hypochlorite generator would produce sodium hypochlorite according to the volume of the cistern, and dilute and supplement sodium hypochlorite automatically. The equipment had the advantages of simple control and stable residual chlorine at the end of the pipe network and improves the safety of the water supply when it is applied in chlorination of the secondary water supply system.