LIU Zhenyu,YANG Shi,ZHANG Xin

(China Coal Academy Energy Conservation Co.Ltd.,State Key Laboratory of Coal Mining and Clean Utilization, National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control,Beijing 100013,China)

Abstract:In order to explore the reasonable width of the outlet baffle of the lock valve,the experimental equipment of 200 mm caliber air lock valve was made by 3D printer.The effects of groove depth,bottom shape,the density of coal filling,and the velocity of the groove on the discharge curve of the groove were investigated experimentally.The results indicate that the fluidity of pulverized coal used in the experiment from Shendong Bulianta pulverized coal is poor,and it is easy to aggregate and bridge.When the filling density exceeds the slack density,the peak value of the groove discharge curve moves to the right.The increase of groove depth will lead to the parallel expansion of the right half of the discharge curve.As the groove moving speed increases,the output curve moves to the right as a whole,and the dispersion increases.When the baffle is set on the left side of the outlet,the output curve will shift to the right as a whole.Since the effective discharge time on both sides of the groove is less than the center,the undischarged coal powder is concentrated on both sides of the outlet.In conclusion,ensuring that the coal filling density is less than the loose loading density,reducing the groove depth,reducing the groove moving speed,and reducing the width of the outlet baffle is conducive to the smooth unloading of the lock valve.

Keywords:air lock valve;discharge valve;discharge distribution;baffle;seal

中图分类号：TB44                               文献标志码：A

文章编号：1008-5548(2020)05-0048-06

DOI:10.13732/j.issn.1008-5548.2020.05.008

收稿日期： 2020-01-12，修回日期：2020-02-28，在线出版时间：2020-07-07 15:24。

基金项目：中国煤炭科工集团科技创新创业资金专项，编号：2018-TD-ZD001。

第一作者简介：刘振宇(1987—)，男，硕士研究生，研究方向为粉体流动。E-mail：lzy_13579@139.com。