BAI Hua-qing,ZHENG Shuang,LI Yu,et al.Optimized Design for High Turbidity Raw Water in Waterworks[J].China Water & Wastewater,2020,36(12):86-90.
净水厂应对高浊度原水的优化设计
- Title:
- Optimized Design for High Turbidity Raw Water in Waterworks
- 关键词:
- font-size: 10pt; ">净水厂; 高浊度水; 平流斜管沉淀池
- 摘要:
-
四川金堂新建一座净水厂，总设计规模为12×104 m3/d， 其中一期规模为6×104 m3/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/m3，加氯量约5.83 g/m3，千吨水电耗为270.83 kW·h。
- Abstract:
-
The new water treatment plant in Jintang, Sichuan Province, with a total design scale of 12 ×104 m3/d, the design scale of the first phase project is 6×104 m3/d, adopts combined process of conventional grid flocculation, horizontalflow inclinedtube 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 highturbidity 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 (GB 5749-2006). During operation, the PAC dosage was about 29.04 g/m3, the chlorine dosage was about 5.83 g/m3, and the power consumption per kiloton water was 270.83 kW·h.
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