Experimental study of the blockage boundary for dense-phase pneumatic conveying of powders through a horizontal slit  

作　　者：Shengyong Hu Fubao Zhou Yingke Liu Jianhong Kang Yifan Zhang Tongqiang Xia 

机构地区：[1]Faculty of Safety Engineering,China University of Mining and Technology [2]College of Mining Technology,Taiyuan University of Technology [3]Key Laboratory of Gas and Fire Control for Coal Mines,China University of Mining and Technology

出　　处：《Particuology》2015年第4期128-134,共7页颗粒学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51174199);the Jiangsu Province Outstanding Youth Scientific Fund(BK2012003);the Program for Innovative Research Team in University(IRT13098);the Science and Technology Invocation Team of Qinglan Project of Jiangsu;a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions

摘　　要：The estimation of the blockage boundary for pneumatic conveying through a slit is of significant importance. In this paper, we investigate the characteristics for blockage of powder （48 gLm average diameter） through a horizontal slit （1.6 m × 0.05 m × 0.002 m）. The results show that the required critical solid mass flow rate increases as the superficial air velocity increases superficial air velocity. The solid loading ratio and superficial air velocity displayed a decreasing power law relationship. This finding agrees with existing theory and experimental results. However, a minimum inlet solid loading ratio exists. When the air velocity is greater than the corresponding air velocity of the minimum solid loading ratio, the solid loading ratio exhibits an increasing trend in power law. We also found that when the inlet conveying pressure increased, the critical solid mass flow rate required for blockage, the inlet solid loading ratio, and the minimum inlet solid loading ratio increased.The estimation of the blockage boundary for pneumatic conveying through a slit is of significant importance. In this paper, we investigate the characteristics for blockage of powder （48 gLm average diameter） through a horizontal slit （1.6 m × 0.05 m × 0.002 m）. The results show that the required critical solid mass flow rate increases as the superficial air velocity increases superficial air velocity. The solid loading ratio and superficial air velocity displayed a decreasing power law relationship. This finding agrees with existing theory and experimental results. However, a minimum inlet solid loading ratio exists. When the air velocity is greater than the corresponding air velocity of the minimum solid loading ratio, the solid loading ratio exhibits an increasing trend in power law. We also found that when the inlet conveying pressure increased, the critical solid mass flow rate required for blockage, the inlet solid loading ratio, and the minimum inlet solid loading ratio increased.

关 键 词：Dense phase Pneumatic conveying Blockage boundaw Horizontal slit 

分 类 号：TQ022[化学工程]