基于两相流的氧化沟推流器分布特性研究  

Study on distribution characteristics of thruster in oxidation ditch based on two-phase flow

作　　者：王启瑞 荣红 郑源[1] 陈小翠 WANG Qirui;RONG Hong;ZHENG Yuan;CHEN Xiaocui(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China;NARI Water Conservancy and Hydropower Technology Co.,Ltd.,Nanjing 211106,China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100 [2]南京南瑞水利水电科技有限公司,江苏南京211106

出　　处：《水利水电科技进展》2024年第2期42-46,共5页Advances in Science and Technology of Water Resources

摘　　要：针对氧化沟污水处理技术中可能存在的能耗大、污泥淤积的问题,将活性污泥的黏度和沉降速率通过用户自定义函数导入Fluent软件,对某污水处理厂的标准氧化沟进行水-活性污泥两相流数值计算,得到氧化沟中推流器功率、速度分布情况及污泥分布情况,并对其进行分析比较,选出最优电机功率及推流器分布。对氧化沟内流场特性进行深入分析,将数值模拟及试验测得断面流速进行比较,结果表明各测点数据吻合程度较好,因此认为数值模拟能够较好地预测出真实流场中各点的流速,且速度死区率大的区域污泥质量浓度一般较高。Aiming at the problem of high energy consumption and sludge deposition that could occur in oxidation ditch sewage treatment technology,the viscosity and settling rate of activated sludge was imported into Fluent software through a user-defined function,and then the numerical simulation for water-activated sludge two-phase flow calculation of standard oxidation ditch in a sewage treatment plant was conducted.The power of thruster,the distribution of velocity and sludge in the oxidation ditch could be obtained.Compared with each other,the optimal motor power and velocity distribution was selected.The flow field characteristics of the oxidation ditch were further analyzed and compared the section flow velocity obtained by numerical simulation with the experiment measurements,showing that the data from the measuring points has good performance of consistency,and the velocity of each point in the real flow field can be well predicted by numerical simulation.The sludge mass concentration is generally higher in the area with high velocity dead zone rate.

关 键 词：氧化沟 推流器 计算流体力学 两相流 流速场 

分 类 号：X703[环境科学与工程—环境工程]