摘要
进行了高浓度悬浮液的混凝实验研究。为研究混合阶段渐变剪切速率对混凝沉降效果的影响,在混合阶段分别采用固定搅拌转速和渐变搅拌转速进行实验。在混合阶段采用固定搅拌转速,当搅拌转速为210 r/min时,絮体二维分形维数最高为1.884 7,悬浮液浊度最低为118 NTU。采用渐变搅拌转速的方法,由210 r/min开始逐渐降低搅拌转速,絮体二维分形维数最大,为1.920 5,处理后悬浮液浊度最小,为107 NTU。在一般混凝沉降过程的规律及模型的基础上,提出了高浓度悬浮液混凝沉降过程的物理模型。
The experiment on coagulation of high concentration suspension was carried out.The effects of gradual shear rate on coagulation and settling at the mixing stage were studied by mixing with fixed and graded stirring speed respectively.With fixed stirring,when the stirring speed is 210 r/min,the highest two-dimensional fractal dimension is 1.884 7,and the lowest turbidity of the suspension is 118 NTU.With graded stirring,when the stirring speed is gradual reduced from 210 r/min,the highest two-dimensional fractal dimension is 1.920 5,and the lowest turbidity is 107 NTU.A physical model applied to the coagulation and settling process of high concentration suspension is put forward based on the basic law and model for general coagulation process.
出处
《化工环保》
CAS
CSCD
北大核心
2013年第3期198-201,共4页
Environmental Protection of Chemical Industry
基金
江苏省水利科技资助项目(2012054)
关键词
悬浮液
剪切力
絮体
分形维数
混凝机理
模型
废水处理
suspension
shear stress
floc
fractal dimension
coagulation mechanism
model
wastewater treatment
