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工程科学与技术:2014,46(1):147-152
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热泳力协同作用下气液交叉流脱除PM2.5的研究
(四川大学 化工学院)
Experimental and Numerical Study by a PM2.5Separation Using Gas-liquid Cross Flow System
(College of Chemical Eng.,Sichuan Univ.)
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投稿时间:2013-08-04    修订日期:2013-11-14
中文摘要: 针对气相中PM2.5的高效脱除,对横掠过自由流动的连续液柱表面的含PM2.5气体洗涤净化过程进行了实验研究和数值模拟。采用平均粒径0.3 μm的二氧化钛颗粒生成含尘气体,以Euler-Lagrange模型对PM2.5粒子在气液交叉流中的流场特征进行数学描述。研究分别考察了不同气液温差所导致的热泳力,液相流速等因素对PM2.5颗粒脱除的影响。结果表明液相环境温度维持室温20 ℃,气液相温差从0 ℃增加到30 ℃时,PM2.5粒子的脱除率从6.8%增大至20%。同时,液相流速增大,将有助于PM2.5粒子的脱除。模拟结果与实验结果表现出一致趋势。
中文关键词: PM2.5  气液交叉流  数值模拟  热泳力
Abstract:In order to separate PM2.5 from air efficiently, PM2.5 separating by the surface of falling liquid cylinders from the aerosol contaminated fluid was studied experimentally and numerically.Titanium dioxide whose particle size was 0.3 μm was used as the experimental particles.An Euler-Lagrange model was employed to describe the gas-liquid cross flow and the trap of particles.The influencing factors of purifying process, such as thermophoresis force caused by temperature difference between gas and liquid, gas and liquid flow rate were investigated.The results showed that when liquid temperature kept 20 ℃, the PM2.5trap efficiencies were 6.8%~20% in a four-row liquid columns array with a temperature difference of 0~30 ℃ in the experiments.The experimental data showed a similar trend with the numerical simulation results.
文章编号:201300848     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(20806048;21276161);科技部国际科技合作与交流项目(S2013GR0379)
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引用文本:
余徽,李涵默,魏文韫,朱家骅.热泳力协同作用下气液交叉流脱除PM2.5的研究[J].工程科学与技术,2014,46(1):147-152.
Yu Hui,Li Hanmo,Wei Wenyun,Zhu Jiahua.Experimental and Numerical Study by a PM2.5Separation Using Gas-liquid Cross Flow System[J].Advanced Engineering Sciences,2014,46(1):147-152.