净水厂应对高浊度原水的优化设计  

Optimized Design for High Turbidity Raw Water in Waterworks

作　　者：白华清 郑爽 李煜 陆振飞 BAI Hua-qing;ZHENG Shuang;LI Yu;LU Zhen-fei(Southwest Municipal Engineering Design&Research Institute of China,Chengdu 610081,China;Chengdu Xingrongtuoyuan Waterworks Co.Ltd,Chengdu 610400,China)

机构地区：[1]中国市政工程西南设计研究总院有限公司,四川成都610081 [2]成都兴蓉沱源自来水有限责任公司,四川成都610400

出　　处：《中国给水排水》2020年第12期86-90,共5页China Water & Wastewater

摘　　要：四川金堂新建一座净水厂,总设计规模为12×104m^3/d,其中一期规模为6×104m^3/d,采用常规网格絮凝—平流斜管沉淀—过滤—消毒工艺,并辅以应急处理措施。为保证城市供水的安全可靠,针对主水源北河汛期高浊度原水(高浊度时一般大于3 000 NTU),通过双水源合理调配、在原水输水管道设置沉砂器、采用平流斜管沉淀池等优化设计,实现利用一级混凝沉淀工艺将出水浊度控制在0.3 NTU以下,出水水质达到《生活饮用水卫生标准》(GB 5749—2006)的要求。运行期间,PAC投加量约29.04 g/m^3,加氯量约5.83 g/m^3,千吨水电耗为270.83 kW·h。The new water treatment plant in Jintang,Sichuan Province,with a total design scale of12 × 104 m^3/d,the design scale of the first phase project is 6 × 104 m^3/d,adopts combined process of conventional grid flocculation,horizontal-flow inclined-tube sedimentation,filtration and disinfection process,supplemented by emergency treatment measures.In order to ensure a safe and reliable water supply in the city,and to deal with the high-turbidity raw water of the main source,Beihe River,during flood season( generally more than 3 000 NTU at high turbidity),the design was based on the rational allocation of dual water sources,the application of a sand setter in the raw water pipeline,and the usage of a horizontal-flow inclined-tube sedimentation tank to optimize the design,which has controlled the effluent turbidity below 0.3 NTU by adopting the first-stage coagulation sedimentation process.The quality of the effluent water could meet the requirements of the Standards for Drinking Water Quality( GB5749-2006).During operation,the PAC dosage was about 29.04 g/m^3,the chlorine dosage was about5.83 g/m^3,and the power consumption per kiloton water was 270.83 kW·h.

关 键 词：净水厂 高浊度水 平流斜管沉淀池 

分 类 号：TU991[建筑科学—市政工程]