| 计算流体力学法臭氧接触池水力条件优化 |
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| 引用本文： | 袁蓉芳,周北海,施春红,顾军农. 计算流体力学法臭氧接触池水力条件优化[J]. 土木建筑与环境工程, 2012, 34(Z1): 228-231 |
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| 作者姓名： | 袁蓉芳 周北海 施春红 顾军农 |
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| 作者单位： | 北京科技大学土木与环境工程学院 北京 100083;北京科技大学土木与环境工程学院 北京 100083;北京科技大学土木与环境工程学院 北京 100083;北京自来水集团水质监测中心 北京 100085 |
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| 基金项目： | 国家自然科学基金资助项目(51178043);水体污染控制与治理科技重大专项资助项目(2009ZX07424-003) |
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| 摘 要： | 采用计算流体力学技术，模拟了北京某水厂臭氧接触池中水的流态分布及水力效率。通过流体停留时间分布（RTD）的分析，得知臭氧接触池的T10 /HRT为0.466，短流现象明显，水力效率低。在臭氧接触池中增加导流板后，T10 /HRT值可提高20.38%，但T90 /HRT高达1.316，回流现象明显；设置横挡板，可将T10 /HRT提高15.88%，同时T90 /HRT降至0.821，RTD更为集中，流场更接近理想活塞流。因此，增加横挡板有利于臭氧接触池水力效率的提高。
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| 关 键 词： | 计算流体力学 臭氧接触池 水处理 水力效率 停留时间分布 |
Application of computational fluid dynamics for optimizationof hydraulic efficiency of ozone contactor |
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| YUAN Rongfang,ZHOU Beihai,SHI Chunhong and GU Junnong. Application of computational fluid dynamics for optimizationof hydraulic efficiency of ozone contactor[J]. Journal of Civil,Architectrual & Environment Engineering, 2012, 34(Z1): 228-231 |
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| Authors: | YUAN Rongfang ZHOU Beihai SHI Chunhong GU Junnong |
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| Affiliation: | School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, P.R.China;School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, P.R.China;School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, P.R.China;Water Quality Monitoring Center, Beijing Waterworks Group, Beijing 100085, P.R.China |
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| Abstract: | Computational fluid dynamics is used to simulate the hydraulic efficiency of the ozone contactor in A water plant in Beijing and to optimize the contactor by calculating the retention time distribution (RTD) of the fluid. The result shows that the value of T10 /HRT of the existing contactor is 0.466, and the phenomenon of obvious short circuiting and backflow which result in low hydraulic efficiency exists in the contactor. After optimization, the value of T10 /HRT of the contactor in the presence of guide plates is 0.561, making the hydraulic efficiency increased by 20.38%. However, the value of T90 /HRT is 1.316, which means that the phenomenon of backflow existed. The value of T10 /HRT of the contactor in the presence of horizontal baffles is 0.540, making the hydraulic efficiency increased by 15.88%, and the value of T90 /HRT reduces to 0.821. That means the concentration ratio of RTD increased, and the hydraulic efficiency of whole flow field is improved significantly in the presence of horizontal baffles. |
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| Keywords: | computational fluid dynamics ozone contactor water treatment hydraulic efficiency retention time distribution |
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