氧化沟流场数值模拟及其结构形式改进-《郑州大学学报(工学版)》

文章信息/Info

Title:: Numerical simulation of oxidation ditch flow field and improvement of its structure

作者:: 杨玲霞; 胡蓓蓓; 范如琴.; 郑州大学,水利与环境学院,河南,郑州,450001, 郑州大学,水利与环境学院,河南,郑州,450001, 郑州大学,水利与环境学院,河南,郑州,450001

Keywords:: oxidation ditch; curved diversion wall; Flow field simulation; Biological treatment

摘要:: 准确模拟城市污水处理厂氧化沟中的流态,对其优化设计以保证其稳定运行和生物处理效果至关重要.笔者以FLUENT软件为计算工具,建立一定水深下的氧化沟弯道水流平面二维数学模型,对弯道的流速分布进行模拟研究.结果表明导流墙的形状及位置对氧化沟流场流态影响较大.通过进一步的计算比较,提出了导流墙的优化形式以及最佳布设位置,改善了氧化沟流场的流速分布,防止或减少了沟中的污泥沉积,有利于降低能耗.模拟结果对实际工程的设计有一定的指导意义.

Abstract:: Accurately simulating the flow state in the oxidation ditch of the municipal wastewater treatment plant is essential to optimize its design to ensure its stable operation and biological treatment effect. The author uses FLUENT software as a calculation tool to establish a two-dimensional mathematical model of the water flow plane of the oxidation ditch bend at a certain water depth, and simulates the flow velocity distribution of the curve. The results show that the shape and position of the diversion wall have a great influence on the flow state of the oxidation trench flow field. Through further calculation and comparison, the optimized form and optimal layout position of the diversion wall are proposed, which improves the flow velocity distribution of the oxidation ditch flow field, prevents or reduces the sludge deposition in the trench, and is conducive to reducing energy consumption. The simulation results have certain guiding significance for the design of actual engineering.