摘要
针对多层平板单元组合沉淀池,使用计算流体力学软件建立三维模型,对固液两相流进行了数值模拟,并从理论上解析了平板单元内部流场和污泥颗粒浓度场的情况。结果表明,平板单元的理论最佳平板数目为4,此时同等水量下可使沉淀池面积缩小为原面积的66%。在不同污泥浓度和不同池长情况下,该工艺理论上可使沉淀池面积缩小为原面积的59%~68%,并且能够发挥较好的强化沉淀效果。
Sedimentation tank combined with multi-layer plates unit is a newly developed process.A three-dimensional numerical simulation of the solid-liquid two-phase flow was performed using computational fluid dynamics( CFD) software. The flow field of wastewater and the concentration field of the activated sludge inside the plates unit were analyzed theoretically. The simulation results demonstrated that the optimal layer of the plates unit was four,and the sedimentation tank area could be reduced to 66%under the same wastewater flow rate. Under different activated sludge concentrations and tank lengths,this process could reduce the sedimentation tank area to 59%-68%,and stimulate enhanced sedimentation effects.
出处
《中国给水排水》
CAS
CSCD
北大核心
2018年第7期60-64,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2013ZX07314-003-04)
关键词
沉淀池
多层平板单元
三维数值模拟
计算流体力学
sedimentation tank
multi-layer plates unit
three-dimensional numerical simulation
computational fluid dynamics(CFD)
