All Title Author
Keywords Abstract


A2O氧化沟缺氧区三维流场模拟及结构形式优化

Keywords: A2O氧化沟缺氧区,流场模拟,水下推进器,导流墙

Full-Text   Cite this paper   Add to My Lib

Abstract:

以FLUENT软件为工具,选用三维RNGk-ε紊流数学模型对重庆井口污水厂A2O氧化沟缺氧区内的流场进行模拟,分析了缺氧区内流场分布不均匀及沉泥的原因,提出了水下推进器的合理设置位置与导流墙的合理设置方式,并对优化后的缺氧区进行了模拟计算。通过优化后模拟的结果可见,在相同的功率密度下,缺氧区内的流场得到了较均匀的分布,流速从原来的0.131m/s提升到0.204m/s,减少了能量的损失。底部的流速也从原来的0.140m/s提升到0.226m/s,有效的防止或减少了沟中的污泥沉积。优化的结果对实际工程的设计也有一定的指导意义。

References

[1]  刘广立;种云霄;樊青娟.氧化沟水力特性对处理效果和能耗的影响[J].环境科学,2006(11)
[2]  Lesage N;Sperandio M;Lafforgue C,Calibration and applitation of a 1-D model for oxidatiota ditches,Chel- laical Engineering Research & Design,2003(A9).
[3]  汪大晕;雷乐成,水处理新技术及工程设计,北京:化学工业出版社,2001.
[4]  杨玲霞;胡蓓蓓;范如琴.氧化沟流场数值模拟及其结构形式改进[J].郑州大学学报(工学版),2009(3)
[5]  Versteeg H.K;Malalasekera W,An Introduction to Computational Fluid Dynamics:The Finite Volume Meth- od,New York:wiley,1995.
[6]  许丹宇;张代钧;艾海男.氧化沟反应器流体力学特性的数值模拟与实验研究[J].环境工程学报,2007(12)
[7]  张羽;黄卫东;勾全增.计算流体力学在氧化沟设计中的应用[J].工业用水与废水,2009(1)
[8]  Bob De Clercq ;Filip Coen ;Bart Vanderhaegen ;Peter A. Vanrolleghem,Calibrating simple models for mixing and flow propagation in waste water treatment plants,Water Science and Technology?,1999, 39(4).
[9]  杨华展;王涛;邓荣森.一体化氧化沟弯道流态特性研究[J].重庆建筑大学学报,2007(3)
[10]  FanL;XuN;WangZ.Q,PDA experiments and CFD simulation of a lab-scale oxidation ditch with surface aerators,Chemical engineering Research and Design,2010(1).
[11]  许丹宇,张代钧,陈园,卡鲁塞尔氧化沟液-固两相流动混合物模型与两相水力特性模拟,环境科学学报,2008(12).
[12]  Fayolle Y;Cockx A;Gillot S,Oxyen transfer prediction in aeration tanks using CFD,Chemical Engineering Science,2007(09).
[13]  Helen X. Littleton ;Glen T. Daigger ;Peter F. Strom,Application of Computational Fluid Dynamics to Closed-Loop Bioreactors: Ⅰ. Characterization and Simulation of Fluid-Flow Pattern and Oxygen Transfer,Water Environment Research?,2007, 79(6).
[14]  Luo L;Li W.M;Deng Y.S,Numerical simuta- tion of a combined oxidation ditch flow using 3D k-6 turbu- lence model,Environmental Science,2005(5).

Full-Text

comments powered by Disqus