中文摘要：

嘉兴某公司净水厂在扩容新建澄清池过程中使用涡流絮凝澄清技术，对《给水排水标准图》中320m^3／h水力循环澄清池S771（八）的内部构造作适当改造：缩短喉管长度，改变第一及第二反应室构造并在反应区加入涡流反应器，沉淀区加设斜管，外形尺寸及结构保持不变。改造后单池处理规模提高到500m^3／h，澄清池出水浊度稳定在3NTU以下，滤后水浊度小于1NTU，涡流投资在35元／m^3以下。实践表明，涡流絮凝澄清技术具有澄清效率高、出水质量优、适应变化能力强、施工方便等优点。

英文摘要：

The vortex flocculation clarification technology was employed in the reconstruction project of a water treatment plant in Jiaxing. The inter structure of 320 m^3/h circulator clarifier S771 was properly modified： the throat pipe was shortened; the first and second reaction chamber structure were changed and the vortex reactors were embedded in the reactor areas; the size and structure of the sedimentation area were remained the same but the tubes were installed. After the reconstruction, the processing capability of single tank increased to 500 m^3/h, the turbidity of the effluent from clarification tank and filtration was respectively below 3 NTU and 1 NTU respectively, and the invest for vortex was below 35 YUAN/m^3. The practical application showed that the vortex flocculation clarification technology had many advantages, such as high efficiency, high effluent quality, outstanding flexibility, and easy construction.