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Thesis Advisor李洪钟
Degree Grantor中国科学院研究生院
Other AbstractBy analyzing the average solids flow rate and pressure signals of Geldart's A powders flowing through the orifice of a hopper connected to a moving-bed standpipe with negative pressure drop, it was found that there existed pressure regime, bubble regime, plug regime and flow-stopping regime successively with the increase of the absolute values of total pressure drop in the standpipe and hopper. According to the properties of powders and operation condition, the arching in a standpipe with negative pressure drop has been classified into two types, i.e., bubble arching and particulate arching. The particulate arching in a standpipe can be subcatalogued into static arching and dynamic arching due to the process of their formation. Based on non-fluidized gas-solids two phase theory and particulate medium mechanics, both models, one of which is used to predict the width of static arching in a conical hopper and another to predict the width of arching of dynamic arching due to the effect of solids circulating rates, were presented and confirmed by experiments. Based on the above results, a new value, so called Hopper-Valve, which is connected to the bottom of a moving-bed standpipe with negative pressure drop for controlling solids circulating rate, was presented. The design method, the watching method, the range of operation and the points for attention for the new valve were given.
Document Type学位论文
Recommended Citation
GB/T 7714
景山. 在负压差移动床立管漏斗阀中A类物料流动和架拱特性研究[D]. 中国科学院研究生院,1997.
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在负压差移动床立管漏斗阀中A类物料流动和(6627KB) 限制开放CC BY-NC-SAApplication Full Text
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