摘要
以预测静态拱宽度模型为基础，结合立管中气固之间相互作用特征，推导出散体颗粒循环量突变对料斗中形成的动态拱宽度影响的理论模型．利用散体颗粒在无压差条件下通过孔口流落来模拟其循环量突变，实验证明模型可以预测立管中散体颗粒循环量突变时料斗中动态拱宽度，指出了今后工作的主要方向．
Based on the model employed to predict the width of the static arching, a new model considering the effect of the collision stress due to sudden change of solids circulating rate on the surface of powder in a movingbed standpipe with negative pressure gradient, on the width of dynamic arching is derived. In experiments, the sudden change of solids circulating rate is controlled by powder flowing through the orifice of a slide valve. The experimental results show that the model can predict the width of dynamic arching due to sudden change of solids circulating rate and future work is also suggested.
出处
《化工冶金》
CSCD
北大核心
1998年第1期31-37,共7页
基金
中国石油化工总公司赞助
关键词
负压差
循环量突变
动态拱宽度
立管
Sudden change of solids circulating rate, Negative pressure gradient, Width of dynamic arching
