摘要
高密度沉淀池因占地面积小等优点,被广泛应用于污水处理厂深度处理与提标改造工程,但其复杂的流场分布特征也会影响处理效果。利用武汉市南太子湖污水处理厂高密度沉淀池的实际参数建立了高密度沉淀池的三维几何模型,并基于标准k-ε湍流模型与多重参考系方法等建立了相应高密度沉淀池计算流体力学(Computational Fluid Dynamics,CFD)模型,模拟了高密度沉淀池流场分布特征,最后采用实测流速结果对三维CFD模型的模拟结果进行了校验。结果表明:流速实测结果与模拟结果标准相对误差为7.66%,显示该高密度沉淀池三维CFD模型可以对流场分布进行准确模拟。研究成果可为高密度沉淀池基于数值模拟的设计与运行优化研究提供参考。
High-rate clarifiers are widely used in advanced treatment and upgrading projects of wastewater treat⁃ment plants because of their small footprint and other advantages.However,the complex characteristics of flow field distribution affect their treatment effects.This paper established a three-dimensional model of the high-rate clarifi⁃er based on the actual parameters of Nantaizi Lake wastewater treatment plant in Wuhan.Moreover,the correspond⁃ing computational fluid dynamics model of high-rate clarifier was established based on the standard k-εturbulence model and the Multiple Reference Frames.The established model could simulate the flow field distribution charac⁃teristics of high-rate clarifier.Finally,the developed CFD model was successfully validated against the experimen⁃tal results of velocities distribution.And the normalized standard errors of flow velocities were less than 7.66%which showed that the CFD model of the high-rate clarifier can accurately simulate the flow field distribution.This research lays the foundation for the design and operation optimization of high-rate clarifiers based on numerical sim⁃ulation.
作者
许琪
徐成剑
万艳雷
陈浩
周秋红
李迎喜
刘会娟
XU Qi;XU Chengjian;WAN Yanlei;CHEN Hao;ZHOU Qiuhong;LI Yingxi;LIU Huijuan(Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China;Key Laboratory of Changjiang Regula-tion and Protection of Ministry of Water Resources,Wuhan 430010,China;Hubei Key Laboratory of Basin Water Security,Wuhan 430010,China;Center for Water and Ecology,School of Environment,Tsinghua University,Beijing 100084,China;CISP-DR Corporation,Wuhan 430010,China)
出处
《水利水电快报》
2022年第6期117-124,共8页
Express Water Resources & Hydropower Information
基金
中国博士后科学基金资助项目(2021M692753)
湖北省自然科学基金(2021CFB159)
湖北省博士后创新实践岗位项目(265306)。
关键词
高密度沉淀池
数值模拟
CFD
流场分布
污水处理厂
high-rate clarifier
numerical simulation
computational fluid dynamics
flow field distribution
waste water treatment plant
