机械絮凝与折板絮凝冬季运行对比分析  

Comparative analysis between mechanical flocculation and folded-plate flocculation in winter

作　　者：王全勇 彭锦玉 赵晓菲 王小 解跃峰 Wang Quanyong;Peng Jinyu;Zhao Xiaofei;Wang Xiaomao;Xie Yuefeng(China Urban Construction Design&Research Institute Co.,Ltd.,Beijing 100120,China;School of Environment,State Key Joint Laboratory of Environmental Simulation and Pollution Control,Tsinghua University,Beijing 100084,China;Environmental Engineering Programs,The Pennsylvania State University,Pennsylvania 17057,America)

机构地区：[1]中国城市建设研究院有限公司,北京100120 [2]清华大学环境学院环境模拟与污染控制国家重点联合实验室,北京100084 [3]美国宾州州立大学,宾夕法尼亚17057

出　　处：《给水排水》2020年第5期62-67,共6页Water & Wastewater Engineering

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07501-002)。

摘　　要：为对比折板絮凝与机械絮凝对低温低浊水的处理效果,特选取黄河下游两个原水水质与混合工段相似的水厂。基于颗粒物粒径分布与浊度分析,表明相较于折板絮凝,机械絮凝可以为絮体的成长提供良好的水力条件,各级絮凝段颗粒物密度系数A和颗粒物粒径分布系数β均低于相应折板絮凝工段,大粒径颗粒物占比明显提高,出水中1μm以上颗粒物平均粒径为6.5μm,高于折板絮凝出水颗粒物平均粒径3.1μm。此外,经相同烧杯沉淀后,机械絮凝与折板絮凝出水浊度分别为(1.1±0.2)NTU与(2±0.3)NTU。研究结果表明机械絮凝在降低浊度和CODMn等方面,效果优于折板絮凝,为水厂运行优化及水质提标提供理论和实践基础。In order to compare the treatment effects of folded-plate flocculation and mechanical flocculation on low-temperature and low-turbidity water,two water plants with similar raw water taken from the lower Yellow River were selected to conduct a comparative analysis.Based on particle count and turbidity analysis,the study indicates that mechanical flocculation can provide better conditions for the growth of flocs than folded-plate flocculation.The power law density coefficient(A)and power law slope coefficient(β)of flocculation at each stage is lower than that of the corresponding folded-plate flocculation.The proportion of large particle size increased,and the average size of particles above 1μm in effluent was 6.5μm,which is higher than the average particle size of the folded-plate flocculation at 3.1μm.In addition,the turbidity values of mechanical flocculation and folded-plate flocculation after settling in the beaker test were(1.1±0.2)NTU and(2±0.3)NTU,respectively.The results show that mechanical flocculation performed better than foldedplate flocculation in reducing turbidity and CODMn.This study provides a theoretical and practical basis for the design and operation optimization and improvement in waterworks.

关 键 词：折板絮凝 机械絮凝 颗粒数 能量分布 

分 类 号：TU992[建筑科学—市政工程]