摘要
目前在城市供水领域中,次氯酸钠消毒已逐渐替代了原有的液氯消毒,但是在实际使用过程中存在管道易结垢堵塞、次氯酸钠稳定性较差、出水余氯波动等技术瓶颈。为提高次氯酸钠投加的安全可靠性,W市Z水厂对次氯酸钠投加系统进行了优化改造。改造方案包括:增设离子交换树脂软水装置,降低了稀释水体的硬度;优化次氯酸钠投加管道,提高加药系统的备用系数;对加药泵重新选型,便于精准投加和智能化管理。改造完成后,水质软化效果较好,管道结垢现象明显减少;投加管道可实现1用1备和管道冲洗的功能;出水余氯较为稳定,出水水质符合《生活饮用水卫生标准》(GB 5749—2006)。本次改造保障了水厂的水质安全,实现了精准加药和稳定运行。
At present,sodium hypochlorite disinfection has gradually replaced the original liquid chlorine disinfection in the field of urban water supply.However,there are some technical bottlenecks in the actual use,such as pipe scaling,poor stability of sodium hypochlorite and fluctuation of residual chlorine.In order to improve the safety and reliability of sodium hypochlorite dosing,the sodium hypochlorite dosing system of Z water treatment plant(WTP)in W City was optimized and reconstruction.The transformation plan included:Adding an ion exchanger resin water softener to reduce the hardness of dilution water;optimizing dosing pipelines to improve the reserve factor of dosing system;re-selecting pump to achieve accurate dosing and intelligent management.After the reconstruction,the water softening effect was better,and the phenomenon of pipe scaling was significantly reduced;the dosing pipelines could realize the function of pipeline backup and pipeline flushing;the residual chlorine of the effluent water was relatively stable,and the quality of the effluent meet the Standards for Drinking Water Quality(GB 5749-2006).This optimization ensured the water quality safety of the WTP,and achieved accurate dosing and stable operation of the WTP.
作者
钱斌
汪晋舟
张江涛
袁可心
孙倩雯
QIAN Bin;WANG Jinzhou;ZHANG Jiangtao;YUAN Kexin;SUN Qianwen(Wuxi Water Group Co.,Ltd.,Wuxi214000,China)
出处
《净水技术》
CAS
2022年第9期180-186,共7页
Water Purification Technology
基金
无锡市水务集团科研项目(KY202101B)。
关键词
自来水
次氯酸钠
优化改造
离子交换树脂
备用管道
数字计量泵
tap water
sodium hypochlorite
optimization and reconstruction
ion exchange resin
standby pipeline
digital metering pump
