驻极体纤维层捕集颗粒过程的LB-DEM模拟

发布时间：2018-01-13 18:11

  本文关键词：驻极体纤维层捕集颗粒过程的LB-DEM模拟　出处：《工程热物理学报》2017年11期 　论文类型：期刊论文

  更多相关文章： 微细颗粒 驻极体滤料 格子玻尔兹曼 离散单元法 纤维排布

【摘要】：由于同时具备机械捕获和静电吸附两种除尘机制,驻极体滤料具有更高的过滤效率,在微细颗粒物净化中得到越来越广泛的应用。本文利用格子波尔兹曼耦合离散单元法模拟研究了顺排、叉排、随机排列三种纤维排布方式下清洁和含尘驻极体滤料过滤性能的差异。模拟过程中详细考虑了颗粒和纤维间的粘附碰撞过程。研究结果表明,较普通滤料,驻极体滤料对大尺度中性颗粒捕获能力的促进作用更强;随着颗粒在纤维表面的沉积,驻极体滤料和普通滤料对中性颗粒捕集效率的差异逐步趋小。对于布朗扩散为主的细颗粒,均匀排布(顺排和叉排)时滤料捕集效率较随机排布时更大;而对于惯性和拦截效应为主的较大尺度颗粒,叉排排布时滤料捕集效率较顺排和随机排列大。
[Abstract]:At the same time as with mechanical and electrostatic adsorption of two kinds of dust capture mechanism, electret filter material has higher filtration efficiency, has been widely used in the purification of fine particles. The discrete element method simulation of the lattice along the row, Pohl Seidman coupling using staggered difference, cleaning and filtration performance of dust containing electret the random arrangement of three kinds of fiber filter arrangement. The simulation process are taken into account in the process of collision between the particles and the adhesion of fiber. The results show that, compared with ordinary filter, electret material capture capability of large scale neutral particles promote stronger; as the particles deposited on the surface of the fiber, and the difference of electret material the common filter of the neutral particle capture efficiency gradually. For Brown spread the fine particles, evenly distributed (in-line and staggered) filter when the trapping efficiency is greater when the random arrangement of; In the larger scale particles with the main inertia and the intercepting effect, the filter collection efficiency of the filter material is larger than that of the random and random arrangement when the fork row is arranged.

【作者单位】： 华南理工大学化学与化工学院;
【基金】：国家自然科学基金青年基金(No.51506058) 广东省自然科学基金(No.B6150120)
【分类号】：O347.7
【正文快照】： 0前言微细颗粒物污染是当前我国面临的最严峻的大气环境问题之一。驻极体过滤器依靠驻极体滤料的永久荷电,在过滤器内部形成静电场,在传统过滤器机械过滤的基础上,增加了静电吸附除尘作用。因而它可以在过滤压降基本不变的情况下,大大提高过滤效率,被认为是最经济有效的颗粒，

本文编号：1419955