PDA在黄河高浊度水处理中的应用研究

Study on application of PDA in treating Yellow River high-turbid water

根据光散射颗粒分析仪 (PDA)的检测原理 ,通过理论分析把平均透光强度 (对应于DC值UD)确定为原水特性的表征参数。并通过试验得到 ,单位体积水中泥沙颗粒总表面积SP 与DC值具有幂函数关系 :SP =c(UD) d ,且与原水中颗粒性质有关 ,对于黄河青铜峡泥沙来说 ,c =38 35 8,d =- 0 791 ,R2 =0 977。建立了高分子絮凝剂投药量D与原水DC值之间的幂函数关系 ,即在一定的浑液面沉速下D =f(UD) =e(UD) f ,平均相关系数达到 0 981 。

The average transmitted light intensity ( U D correspond to DC value) is determined as the characteristic parameter of raw water by theoretic analysis on the basis of theory of photometric dispersion analyzer(PDA). The experimental results show that there is an exponential function relation between DC and surface area of sand clay ( S P) in unit volume water: S P =c(U D ) d,in which c and d are empirical coefficients related to the character of particles, for sand particles of Qingtongxia, c =38 358, d =-0 791 and R 2=0 977. There is an exponential function relation between macromolecule flocculant dosage ( D ) and DC value under condition of fixed interface level settling velocity: D=e(U D ) f. The average correlation coefficient equal to 0.981. So the new formula of macromolecule flocculant dosage is established.