基于气泡碰撞的筛板曝气试验研究  

STUDY OF AERATION EXPERIMENT WITH SIEVE BASED ON BUBBLE COLLISION

作　　者：周欣[1] 宋宝华[1] 王中原[1] 张翔宇[1] 

机构地区：[1]中节能六合天融环保科技有限公司,北京100085

出　　处：《环境工程》2013年第S1期426-429,共4页Environmental Engineering

摘　　要：应用CFD对曝气过程的气泡分布进行模拟分析,并通过现场试验进行验证。模拟结果表明:增加筛板后的气泡粒径减小、比表面积有所增加,气泡粒径分布随时间较均匀,绝大多数分布在0.05 m以下,气泡净增数量和比表面积的降幅均减小。现场试验结果表明:氧化池增加筛板后经过15 h即可达到60%的氧化率,比无筛板时节约21 h工作时间。在1.6 m高度处设置36%开孔率的筛板,对提高氧化效率有明显作用。CFD was used for simulation and research of the bubble distribution in aeration process,and verified in a pilot. The results show that: at the aeration process with sieve,the bubble size decrease,BET increase,the bubble size distributes more uniform over time,the vast majority of distribution are located below 0. 05 m. The decline of bubble total number net increase and BET are reduced. Pilot results show that: the oxidation rate can reach 60% after 15h,which can save 21 h than that without sieve. The sieve setting at 1. 6 m height with 36% porosity plays a significant role in increasing oxidation efficiency.

关 键 词：气泡碰撞 数值模拟 曝气池 筛板 

分 类 号：X71[环境科学与工程—环境工程]