Abstract:

A guide plate grit chamber was constructed based on the different influent flow rate. The wastewater treatment efficiency of the reduced model was also discussed under different initial boundary conditions. Based on the COMSOL Multiphysics numerical simulation platform, the flow field distribution of the swirling grit chamber under different boundaries was simulated. The state of the flow field clarifies the influence of the guide plate on the water treatment efficiency of the swirling grit chamber. The results show that the presence of the guide plate can effectively improve the sand removal performance of the swirling grit chamber, which strengths the effective separation of sand particles and organic matter. Moreover, when the influent flow rate was 0.32 m/s, the gravel reached the maximum removal rate. Thus, the guide plate can not only effectively restrain the internal flow characteristics of the grit chamber, but also maintain the capability of subsequent biochemical treatment of sewage.

Key words: guide plate swirl grit chamber, boundary condition, wastewater treatment efficiency, numerical simulation, flow field states

摘要：

构建了导流板旋流沉砂池，探讨了缩小模型在不同的初始边界条件下的水处理效能，并基于COMSOL Multiphysics数值模拟平台，模拟了不同边界下旋流沉砂池内部的流场状态，明确了导流板的存在对于旋流沉砂池水处理效能的影响趋势。结果表明，导流板的存在可有效地提高旋流沉砂池的除砂性能，强化砂粒与有机物的有效分离，且当进水流速为0.32 m/s时，系统获得的最大砂砾去除率为71.1%，导流板的存在可有效地约束沉砂池内部流态特征且不影响污水的后续生化处理。

关键词: 导流板旋流沉砂池, 边界条件, 水处理效能, 数值模拟, 流场分布

CLC Number: 

• X703