长江科学院院报2017，Vol.34Issue(3)：8-13,6.DOI:10.11988/ckyyb.20150724
一种改进的聚合模型在污泥絮凝-沉降模拟中的应用
An Improved Aggregation Model to SimulateFlocculation-Settling of Sludge
摘要
Abstract
Since the particle size distribution of sludge is difficult to observe, and the fractal structure and the efficiency of flocculation are rarely considered in previous simulations, we established an improved aggregation model to simulate the mechanism of sludge particle aggregation and finally carried out three-dimensional simulation of flocculation-settling of sludge based on population balance model and two-phase flow mixture model.Results revealed that the established mathematical model and simulation method could well reflect the regularity of flocculation-settling of sludge.Furthermore, the particle size distribution range of floccules is widened with the decrease of fractal dimension, the number of large diameter floccules grows rapidly, and the number of small diameter floccules reduces gradually;the decay rate of initial particle number increases with the rising of fractal dimension, and the number of floccules generally increases and then decreases with time, but the maximum floccules number increases with the rising of fractal dimension, the occurence time of the maximum floccule number is shortened with the rising of fractal dimension.关键词
改进聚合模型/群体平衡模型/污泥絮凝/沉降/絮团粒径分布/分形维数/数值模拟Key words
improved aggregation model/population balance model/sludge flocculation/settling/particle size distribution/fractal dimension/numerical simulation分类
建筑与水利引用本文复制引用
黄忠钊,谭立新..一种改进的聚合模型在污泥絮凝-沉降模拟中的应用[J].长江科学院院报,2017,34(3):8-13,6.基金项目
陕西省重点学科建设专项资助项目(106-00X92) （106-00X92）
