污水厂二维沉淀池水流和悬浮物运动数值模拟

Numerical modeling on the movement of water and SS in two-dimensional sedimentation tanks of sewage factory.

以典型城市污水处理厂平流矩形沉淀池速度和浓度分布计算为例,利用涡量-流函数法建立控制方程,并以有限差分法中的控制容积法对方程进行了离散,求出速度分布场后,利用二维浓度迁移方程对沉淀池浓度分布进行了计算.通过与实验数据的对比,验证了方法的有效性与可行性.另外还对沉淀池数值模拟的应用进行了初步探索.

Using the distributing calculation of velocity and concentration in sedimentation tank of strato-rectangle of municipal sewage factory as an example, governing equations were established with vorticiy-stream function method, and dispersed the equations with volume control technique of the finite differencing method. After figuring out the distribution field of velocity, the concentration distribution in sedimentation tank was calculated using two-dimensional concentration transport equation. The validity and feasibility of the method was verified through comparing with experimental data. Furthermore, tentative exploration of applying the numerical simulation of sedimentation tanks was also carried out.