基于离散元法的煤矿井下护孔筛管防堵性颗粒流分析
发布时间：2018-09-11 16:24
【摘要】：基于离散单元法,用PFC3D软件建立了煤粉颗粒通过筛管的颗粒流模型,通过对煤粉颗粒穿过筛眼体积量的模拟,研究了护孔筛管的防煤粉堵塞性能,分析了筛眼直径、粒径比和围压等参数对煤粉颗粒通过筛管性能的影响规律。结果表明:穿过筛眼的颗粒体积随着筛眼和粒径比的增大而增大,且随着筛眼直径的增大其趋势逐步加大,总体上讲,穿过筛眼的颗粒体积整体上随着围压的增大而增大,但存在着"激变"区间,即围压增长到某一范围时,煤粉颗粒通过筛眼的体积量突然增大。
[Abstract]:Based on discrete element method and PFC3D software, the particle flow model of pulverized coal particles passing through sieve tube is established. By simulating the volume of pulverized coal particles passing through the sieve hole, the performance of preventing coal powder plugging and analyzing the diameter of sieve hole are studied. The effect of particle size ratio and confining pressure on the performance of pulverized coal particles through the sieve tube. The results showed that the volume of particles passing through the sieve increased with the increase of the sieve hole and the ratio of particle diameter, and the trend gradually increased with the increase of the diameter of the sieve. As a whole, the volume of particles passing through the sieve increased with the increase of confining pressure. However, there exists a "shock zone", that is, when the confining pressure increases to a certain range, the volume of pulverized coal particles passing through the sieve suddenly increases.
【作者单位】： 中煤科工集团西安研究院有限公司;
【基金】：中煤科工集团西安研究院有限公司科技创新基金资助项目(2016XAYQN04)
【分类号】：TD712.63
本文编号：2237207
[Abstract]:Based on discrete element method and PFC3D software, the particle flow model of pulverized coal particles passing through sieve tube is established. By simulating the volume of pulverized coal particles passing through the sieve hole, the performance of preventing coal powder plugging and analyzing the diameter of sieve hole are studied. The effect of particle size ratio and confining pressure on the performance of pulverized coal particles through the sieve tube. The results showed that the volume of particles passing through the sieve increased with the increase of the sieve hole and the ratio of particle diameter, and the trend gradually increased with the increase of the diameter of the sieve. As a whole, the volume of particles passing through the sieve increased with the increase of confining pressure. However, there exists a "shock zone", that is, when the confining pressure increases to a certain range, the volume of pulverized coal particles passing through the sieve suddenly increases.
【作者单位】： 中煤科工集团西安研究院有限公司;
【基金】：中煤科工集团西安研究院有限公司科技创新基金资助项目(2016XAYQN04)
【分类号】：TD712.63
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