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PM2.5细颗粒物凝并的计算流体力学模拟
CFD simulation on the aggregation of PM2.5 fine particles

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徐俊波 1   张丽 2   岳仁亮 1   赵月红 1   温浩 1 *  
文摘 随着我国城市化和工业化进程日益加快,PM2.5细颗粒物污染已成为突出的环境问题,采用凝并技术使小颗粒凝并为大颗粒成为提高除尘效率、降低PM2.5细颗粒物排放的主要途径。本文采用计算流体力学(CFD)群体平衡模型及自由分子凝并核模拟了细颗粒物的凝并过程,分析了凝并器出口粒径分布的动态演化规律,考察了停留时间及凝并器入口固含率对凝并效果的影响。模拟结果表明,凝并器出口处的平均粒径经历了一个从零开始逐渐增大后趋于稳定的演化过程;在入口固含率为10~(-6)的条件下,颗粒粒径越小,凝并效果越显著,当入口颗粒粒径增大至2.0 μm时,颗粒的凝并几乎可以忽略;凝并器出口平均粒径近似与入口固含率的1/3次方及细颗粒物在凝并器中的平均停留时间成正比。
其他语种文摘 Along with the fast urbanization and industrialization process of our country, the pollution of PM2.5 fine particles became a prominent environmental problem. The aggregation technology, which was used to make fine particles aggregate to larger particles, was the main way to improve the dust removal efficiency and reduce emissions of PM2.5 fine particles. In this paper, the aggregation process of fine particles was simulated by free molecular aggregation kernel and Population Balance Model of Computational Fluid Dynamics, the dynamic evolution of particle size distribution at the export of the aggregation reactor was analyzed, the effect of residence time and solid holdup to particles' aggregation was investigated. The simulation results show that the average particle size at the export of the aggregation reactor undergone a evolution process of increasing gradually from zero and then tending to be stable; when the solid holdup at the entrance was 10~(-6), the smaller the particle size, the more significant effect of particles' aggregation, when the particle size increased to 2.0 μm, the effect of aggregation was almost negligible; the average particle size at the export of the aggregation reactor was approximately proportional to 1/3 of the solid holdup at the entrance and the average residence time of particles in the aggregation reactor.
来源 计算机与应用化学 ,2013,30(8):831-834 【核心库】
关键词 细颗粒物 ; 计算流体力学 ; 群体平衡模型 ; 自由分子凝并核
地址

1. 中国科学院过程工程研究所, 多相复杂系统国家重点实验室, 北京, 100190  

2. 中科合成油技术有限公司, 北京, 101407

语种 中文
文献类型 研究性论文
ISSN 1001-4160
学科 自动化技术、计算机技术;化学工业;环境污染及其防治
基金 国家自然科学基金资助项目 ;  多相复杂系统国家重点实验室自主部署项目
文献收藏号 CSCD:4930001

参考文献 共 10 共1页

1.  . http://www.nasa.gov/topics/earth/features/health-sapping.html 被引 1    
2.  张会君. 控制PM2.5的除尘技术概述. 中国环保产业,2012,3:29-33 被引 2    
3.  Skodras G. Particulate removal via electrostatic precipitators-CFD simulation. Fuel Processing Technology,2006,87(7):623-631 被引 24    
4.  Dascalescu L. Numerical simulation of conductive particle behaviour at the surface of a plate electrode affected by a DC corona field. Journal of Electrostatics,2009,67(2/3):167-172 被引 3    
5.  李庆. 微细粉尘在静电除尘器中的运动状态分析. 环境工程,2011,29(2):73-77 被引 9    
6.  龙正伟. 静电除尘器数值模拟. 化工学报,2012,63(11):3393-3401 被引 13    
7.  Poon J M H. A three-dimensional population balance model of granulation with a mechanistic representation of the nucleation and aggregation phenomena. Chemical Engineering Science,2008,63(5):1315-1329 被引 3    
8.  Lister J D. Adjustable discretized population balance for growth and aggregation. AIChE Journal,1995,41(3):591-603 被引 14    
9.  Schiller L. A drag coefficient correlation. Zeit Ver Deutsch Ing,1935,77:318-325 被引 2    
10.  Schmoluchowski M. Versuch einen mathematischen theorie der koagulationstechnik kolloider losungen. Zeitschrift fur Physikalische Chemie,1917,92:129-168 被引 1    
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