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应用FLUENT软件中的Mixture模型对某给水厂平流式沉淀池运行状况进行模拟。在沉淀池容积一定时改变沉淀池构造尺寸,得到不同工况沉淀去除效率并分析沉淀池尺寸变化对沉淀去除率影响,模拟结果表明池容积一定时沉淀池长宽变化对沉淀去除率影响较小,有效水深变化对沉淀去除率影响显著。应用MATLAB软件拟合出沉淀去除效率曲线、沉淀池费用曲线,构建较为合理的沉淀池优化设计模型,得出沉淀池最经济尺寸,在保证沉淀效率前提下实现年费用最小。
Applying the Mixture model in FLUENT software to simulate the operation status of advection settling tank in a water supply plant. When the volume of sedimentation tank is constant, the sedimentation tank structure size is changed, the removal efficiency of sedimentation under different conditions is obtained, and the influence of sedimentation tank size change on sedimentation removal rate is analyzed. The simulation results show that the change of sedimentation tank length and width has little effect on sedimentation removal rate The change of effective water depth has a significant effect on the removal rate of sediment. The software MATLAB software was used to fit the curve of sedimentation removal efficiency and sedimentation tank cost, and a reasonable design model of sedimentation tank was established. The most economical size of sedimentation tank was obtained and the annual cost was minimized under the premise of ensuring the sedimentation efficiency.