空气斜槽浓相煤粉输送的实验研究  

Experimental Study of Dense Phase Pneumatic Coal Conveying in an Airslide Conveyor

作　　者：李舟航[1] 吴玉新[1] 吕俊复[1] 杨海瑞[1] 岳光溪[1] 

机构地区：[1]清华大学热能工程系热科学与动力工程教育部重点实验室,北京100084

出　　处：《工程热物理学报》2011年第6期1058-1060,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51006062);973项目(No.2010CB227006)

摘　　要：在一个长7 m的空气斜槽内进行浓相输送煤粉的实验研究。实验结果表明,随着空气表观速度增加,煤粉饱和输送量先增加,随后达到稳定,约为0.25 kg/s。槽倾角低于5°时,煤粉不流动。倾角在5°～7°内,煤粉的饱和输送量和最大固气质量比随角度变化不明显,但随倾角增大,处于最大固气比下的工作空气速度范围增大。输送槽高度对煤粉的输送能力影响很大。随着空气表观速度的增加,斜槽内的流型的转变过程是从固定床、脉动式运动到充气流动。Systematic experimental work was carried out on a 7m long airslide conveying system to study the characteristics of dense phase coal conveying.Experimental results show that the maximum conveying capacity increases firstly and then reaches a steady value of 0.25 kg/s as the superficial air velocity increases.Pulverized coal cannot be conveyed when the inclination angle is less than 5°. When the inclination angle is in a range of 5°～7°,the saturated solid mass flow rate and the maximum solid/gas mass ratio do not show a big change.However,there is a larger range of air velocities when the maximum solid/gas ratio appears under a larger inclination angle.The height of the conveyor cross section has an important effect on the conveying capacity.The flow mode changes to pulsatory flow mode from fixed bed and finally reaches a sliding bed mode with the increase of air velocity.

关 键 词：空气斜槽 浓相煤粉输送 充气流动 气固两相流 

分 类 号：TK16[动力工程及工程热物理—热能工程]