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基于DLVO胶体稳定理论和分形理论,通过对絮团中颗粒间相互作用的分析,提出了一种计算絮团极限粒径的方法,在此基础上,分析了絮团的受力情况,从微观的角度提出了一种非均匀沙絮凝形成的清浑界面的初始段沉降速度的计算方法.结合直线段、过渡段和压缩段清浑界面的沉降理论,计算了不加絮凝剂、添加50和100mg/L絮凝剂时清浑界面的沉降速度,利用取自黄河花园口的泥沙样品,进行清浑界面的沉降速度验证试验,试验结果和计算结果较为一致.研究成果对黄河等高浊度细颗粒含沙水流的治理与处理有一定的理论和实际应用价值.
Based on the theory of DLVO colloid stability and fractal theory, a method of calculating the ultimate particle size of flocs was proposed by analyzing the interaction among particles in the flocs. On the basis of this, the force of the flocs was analyzed, A method to calculate the initial settlement velocity of clear muddy interface formed by flocculation of nonuniform sand was proposed. Combining with the settlement theory of clear muddy interface between straight section, transition section and compression section, 100mg / L flocculant settling velocity of muddy interface, the use of sediment samples taken from the Yellow River Huayuankou settling velocity interface validation test, the test results and calculated results are more consistent with the results of the Yellow River turbidity The treatment and treatment of fine-grained sandy water have certain theoretical and practical value.