摘要
为提高穿孔旋流絮凝池的絮凝效果,在竖井内加入网格板,增强其扰流作用。将竖井分为前段、中段、末段,以涡旋速度梯度G_0和湍动能耗散率ε作为絮凝评价指标,在穿孔旋流絮凝池前段、中段都加网格板的情况下,固定中段网格板的各参数,对前段网格板的层数和间距进行模拟,得到计算范围内前段的最佳网格板层数为4、最佳间距为40 cm,这与《栅条、网格絮凝池设计标准》给出的网格絮凝池前段网格板层数在16以上、网格板间距为60～70 cm的参考值不同。
To improve the flocculation effect of the revolving flow flocculation tank,grid plates were added in the shaft to enhance turbulence. The shaft was divided into front section,middle section and end section. The evaluation indices were vortex velocity gradient (G0) and turbulent kinetic energy dissipation rate (ε). The grid plate was added in the front and middle sections of the tank. The parameters of grid plates in the middle section were fixed in the simulation of the front section. The optimized grid plate number and space were 4 layers and 40 cm,respectively,which were below the requirement of 16 grade plates and 60-70 cm space for grid flocculation tank specified in Design Standards for Flocculation Tank with Rack and Screen.
作者
陈玉
王军
张培璇
CHEN Yu;WANG Jun;ZHANG Pei-xuan(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第1期48-51,共4页
China Water & Wastewater
基金
合肥工业大学创新训练项目(2018CXCY189)
关键词
穿孔旋流絮凝池
网格板
涡旋速度梯度
湍动能耗散率
revolving flow flocculation tank
grid plate
vortex velocity gradient
turbulent kinetic energy dissipation rate
