湖南怀化梅子湾水厂过滤系统的技术改造

Renovation of Filtration System in Meiziwan Waterworks in Huaihua City of Hunan Province

对湖南怀化梅子湾水厂过滤系统进行了技术改造,采用反向过滤气水冲洗滤池技术和闭池反冲洗、翻板阀排水方式,解决了出水量达不到设计要求、水质无法满足新标准,以及初滤水水质差等问题。改造后的滤池过滤速度大大提高,日产水量增加了200%,在进水浊度<5 NTU的情况下,出水浊度<0.5 NTU,出水合格率>95%,冲洗效果好且冲洗水耗由日产水量的10%降为1.2%。

Technical renovation was conducted to the filtration system of Meiziwan waterworks in Huaihua City of Hunan Province. The renovation measures of siphon filter were taken as follows ： air-wa- ter back-washing, closure back-washing and flap valve for draining. As a result, the effluent yield could meet the design capacity, the effluent quality could meet the new standard, and the effluent quality of the beginning filtration was improved. The filtration speed of the renovated filter was enhanced, and the daily water yield was increased by 200%. Under the conditions of influent water turbidity below 5 NTU, the effluent turbidity was less than 0.5 NTU, the acceptable rate of effluent was more than 95%. The back- washing effect was great, and the filter wash-water consumption was reduced from 10% to 1.2% of daily water yield.