水力条件对聚硅酸铝铁絮体分形结构的影响研究  

Study on Effects of Hydraulic Condition on Fractal Dimension of Polysilicate Aluminum Ferric Flocculants

作　　者：吴春笃[1,2] 段明飞[1] 解清杰[1] 

机构地区：[1]江苏大学环境学院,江苏镇江212013 [2]扬州环境资源职业技术学院,江苏扬州225127

出　　处：《工业安全与环保》2011年第12期1-3,共3页Industrial Safety and Environmental Protection

基　　金：国家"十一五"重大水专项资助项目(2008ZX07317-001);江苏省社发项目(BE2008615)

摘　　要：制备聚硅酸铝铁复合絮凝剂,研究其絮体分形维数与絮凝效果之间的关系,并进一步分析了水力条件对絮体形态的影响,确定了絮体的动力学模型。结果表明,絮凝剂投加量过多或过少都会降低絮体分形维数;碱化度升高会使絮体更加密实,同时分形维数随搅拌强度的增加而增大,但搅拌条件过强会增大絮体破碎几率;在絮凝初期,分形维数随慢搅时间的增长而增大,之后趋于平缓;絮体粒径受破碎时间的影响,破碎时间越长,破碎后粒径越小。聚硅酸铝铁絮凝剂的动力学模型为反应控制聚集型。In this paper polyaluminum ferric silicate flocculants are prepared, the relationship between fractal dimension of flocs and the effect of fect of flocculation is studied, the influences d hydraulic condition on flocs pattern are analyzed and at last the dynamical mode d flocs is detemined. It turns out that fractal dimension will be lower if the flocculants dosing is too much or not enough; the increase of alkalinity makes the flocs to be more dense and fractal dimension increases with the incwase of the stirring intensity but decreases when it is excessive; at the early stage, fractal dimension increases accompanied by the increase of slow stirring time, then goes to drop off; the diameter of particles is influenced by broken time, and it decreases with the increase of broken time. The dynamical mode of flocs is reaction limited aggregation.

关 键 词：聚硅酸铝铁 分形 絮体 水力条件 

分 类 号：TU991.2[建筑科学—市政工程]