上流式厌氧反应器进水结构数值模拟分析

Flow Pattern Simulations of Water Distributor for Upflow Anaerobic Sludge Bed

在污水水力停留时间一定的条件下,为研究上流式厌氧反应器进水结构中喷口密度、进水管内径和喷口安装角度等因素对进水均匀度的影响,首先建立了进水结构的参数化模型,然后提出了平面内速度变异系数倒数作为进水均匀度评价指标,最后采用流体力学软件Fluent,结合单因素以及多因素正交分析方法,对进水结构进行三维流场数值仿真。仿真结果表明:当进水管内径为110 mm,喷口密度为6,喷口安装角度为30°时,进水均匀度效果较优,有利于提升污水处理效果。

To analyze the impacts of the nozzle density,inlet diameter and nozzle angle with fixed HRT(Hydraulic Retention Time),parameterized models of distributor were set up.The reciprocal of the velocity’s standard deviation in the selected plane was used as the reference index while the single factor and orthogonal analysis were carried out with Fluent software.The results showed that when the diameter of the inlet diameter was 110 mm,the nozzle number was 6,and the nozzle angle was 30°,the uniformity of the inlet water was optimized,and was helpful to improve the sewage treatment effect.