基于離散元法的煤礦井下護(hù)孔篩管防堵性顆粒流分析
發(fā)布時間:2018-09-11 16:24
【摘要】:基于離散單元法,用PFC3D軟件建立了煤粉顆粒通過篩管的顆粒流模型,通過對煤粉顆粒穿過篩眼體積量的模擬,研究了護(hù)孔篩管的防煤粉堵塞性能,分析了篩眼直徑、粒徑比和圍壓等參數(shù)對煤粉顆粒通過篩管性能的影響規(guī)律。結(jié)果表明:穿過篩眼的顆粒體積隨著篩眼和粒徑比的增大而增大,且隨著篩眼直徑的增大其趨勢逐步加大,總體上講,穿過篩眼的顆粒體積整體上隨著圍壓的增大而增大,但存在著"激變"區(qū)間,即圍壓增長到某一范圍時,煤粉顆粒通過篩眼的體積量突然增大。
[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.
【作者單位】: 中煤科工集團(tuán)西安研究院有限公司;
【基金】:中煤科工集團(tuán)西安研究院有限公司科技創(chuàng)新基金資助項(xiàng)目(2016XAYQN04)
【分類號】:TD712.63
本文編號: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.
【作者單位】: 中煤科工集團(tuán)西安研究院有限公司;
【基金】:中煤科工集團(tuán)西安研究院有限公司科技創(chuàng)新基金資助項(xiàng)目(2016XAYQN04)
【分類號】:TD712.63
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