水厂沉淀池运行参数对沉淀效果影响的数值模拟  

Numerical study on operational parameter effect on settling in horizontal flow sedimentation tank

作　　者：龚然[1] 汪德爟[2] 

机构地区：[1]南京工程学院环境工程系,江苏南京211167 [2]河海大学环境科学与工程学院,江苏南京210098

出　　处：《水资源保护》2009年第6期4-7,共4页Water Resources Protection

摘　　要：运用已建立的二维沉淀池数学模型以及k-ε紊流模型,采用非正交同位网格下SIMPLE算法求解水动力和悬浮物沉降的耦合模型,模拟平流沉淀池中悬浮物的沉降过程,在平流沉淀池不同进水浊度和产水量Q(或停留时间T)下进行计算,得出不同运行工况下沉淀池进水浊度与出水浊度之间的定量关系,分析水厂运行管理控制对沉淀池出水质量产生的影响,为水厂提高产水效率和控制沉淀池出水水质提供参考依据。Using non-orthogonal collocated grids and an established two-dimensional mathematical model that consists of the κ-ε turbulent model and suspended solid settling model, and employing the solution algorithm SIMPLE, the settling and transport processes of suspended solids in a rectangular horizontal flow sedimentation tank were simulated. The quantitative relationship between iafluent and effluent turbidity was obtained after a large amount of computations for different operation conditions with different values of influent turbidity and water production Q （or retention time T）. Based on the results, the influence of operational management and control on the effluent water quality from a horizontal flow sedimentation tank was analyzed, and a reference basis was also provided for raising the water production efficiency and effluent water quality.

关 键 词：平流沉淀池 数值模拟 SIMPLE算法 

分 类 号：TU991.2[建筑科学—市政工程]