文献类型：期刊文献

英文题名：Discharge characteristics of cohesive fine coal from aerated hopper

作者：Huang, Wanjie[1];Gong, Xin[1];Guo, Xiaolei[1];Dai, Zhenghua[1];Liu, Haifeng[1];Zheng, Lijiao[1];Zhao, Jinchao[1];Xiong, Yanjun[1]

机构：[1]E China Univ Sci & Technol, Inst Clean Coal Technol, Minist Educ, Key Lab Coal Gasificat, Shanghai 200237, Peoples R China

年份：2009

卷号：194

期号：1-2

起止页码：126

外文期刊名：POWDER TECHNOLOGY

收录：;EI(收录号：20092212101770);WOS:【SCI-EXPANDED(收录号:WOS:000267634400016)】；

基金：This work was supported by the National key Program of Basic Research in China (2004CB217703), and Program for Changjiang Scholars and Innovative Research Team in University (IRT0620).

语种：英文

外文关键词：Aeration hopper; Fine cohesive coal; Discharge rate

摘要：This paper presents some experimental results of discharge characteristic of cohesive fine coal from aerated hopper. A plexiglas hopper was used to visualize the flow pattern of the coal discharge. Arch can be easily formed during the gravity discharge. The addition of gas can improve the stability and the flow rate of the discharge. At low gas flow rate, two kinds of flow pattern existed at the same time, mass flow and swirl flow. As the gas flow rate increased up to a high level, gas balanced arch occurred, and the discharge rate decreased sharply. In addition, the effect of aeration pattern and outlet diameter on the coal discharge has been studied. Different aeration position results in different flow pattern and stability. Controlling the gas flow rate can realize maximum discharge rate. During the aerated discharge, the influence of outlet diameter and bulk status is changed with the gas flow rate compared with the gravity discharge. According to this law, a new model has been developed to predict the mass flow rate. (C) 2009 Elsevier B.V. All rights reserved.