机械旋转格网强化混凝处理低温低浊水研究  

Mechanical Rotating Grid for Enhanced Coagulation of Low Temperature and Low Turbidity Water

作　　者：马军[1] 江进[1] 杨友强[1] 刘胜利 王志军 王子林[1] 丁浩[1] 魏星际 郭忠凯[1] 史乐[1] 张剑桥[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]哈尔滨供水工程有限责任公司,黑龙江哈尔滨150060

出　　处：《中国给水排水》2012年第17期5-8,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07424-005)

摘　　要：针对北方寒冷地区水质、水量随季节变化大和低温、低浊的水质特点,发明了机械旋转格网强化混凝技术,利用超小孔间距的机械旋转格网在低能耗条件下创造较剧烈的微观水力条件,强化低温低浊水的混凝。该技术可随原水水质与水量的变化动态地调节微观水力条件并进行实时优化控制。以哈尔滨磨盘山水厂的原水为处理对象,开展了机械旋转格网强化混凝的工艺条件研究,结果表明其对低温低浊水的强化混凝效果显著,而且在适当调整转速和控制相同能耗的情况下可显著提高处理效果。通过生产性试验和工程示范运行,对比了加机械旋转格网和不加机械旋转格网两种情况下对低温低浊、有机物含量高地表水的强化处理效果。经过6个月以上的生产性对比运行,表明在相同能耗和沉后水水质条件下,采用机械旋转格网和优化混凝剂的工艺系统比水厂对照组节省混凝剂投量约19.6%,为解决磨盘山净水厂投药量大的难题找到了一条经济、高效和易于管理的技术途径。A novel mechanical rotating grid flocculator was invented to enhance the coagulation and flocculation of surface water characterized by low temperature and low turbidity. A rotating grid flocculator with very small mesh grid was used to create vigorous micro-hydraulic condition at low energy consumption. This technology can adjust the micro-hydraulic condition to optimal state according to the variation of raw water quantity and quality. The efficiency of this technology for treating the source water of Mopanshan Water Treatment Plant was investigated. Experiments found that a significant enhanced coagulation was achieved at low energy consumption and appropriate rotating speed. A comparative full scale test was conducted with and without the mechanical rotating grid. The coagulant dosage when using the mechanical rotating grid was 19.6% lower than the dosage required without the mechanical rotating grid.

关 键 词：机械旋转格网 强化混凝 低温低浊水 

分 类 号：TU991.2[建筑科学—市政工程]