微旋流沉降器分离效率的准数模型

通过因次分析和实验数据回归建立了新型微旋流沉降器的无因次准数模型。用模拟悬浮液通过改变流体流量?原水浊度?絮凝剂量?沉降器波纹板斜槽的直径进行沉降实验,测定进水流量、絮凝体沉速、进出水及澄清器内各点溢流水的浊度。结果表明:絮凝体沉速对出水浊度的影响最大;流体流速较小时,增大流速出水浊度减小,流速较大时,增大流速出水浊度增大;波纹斜槽直径越小分离效率越高。实验数据回归的分离效率准数模型与实验及工业数据吻合良好。

Model of dimensionless numbers for predicting clarifying efficiency of micro-cyclone clarifier

A model of dimensionless numbers for a novel micro-cyclone clarifier was established through the method of dimensional analysis and regression of experimental data.Experiments were performed on simulated suspensions by varying flow rates and turbidities of the suspensions,doses of flocculants and diameters of the inclined troughs of corrugated plates in the clarifier.Inlet flow rate of the suspensions,settling rate of the flocs and turbidities of inlet suspensions,outlet clarified liquors,and the overflow in the clarifier at different points were measured.The results show that the turbidity of clarified liquor is most influenced by the settling rate of flocs;the turbidity of clarified liquor decreases with the increase of the flow rate when it is low but increases with the increase of the flow rate when it is high;the clarifying efficiency increases with the decrease of the diameter of the inclined trough.The regressed model of dimensionless numbers with experimental data shows a good agreement with both the experimental and industrial data.