エアレート時におけるオリフィス付きスタンドパイプからの粉粒体排出

抄録

Injecting air into a atandpipe with an orifice, the aeration rate, the flow rate of granular materials and the air pressure distribution in the standpipe are measured. The relationship between the aeration rate and the flow rate of granular materials for different particle diameters, orifice diameters and the locations of air injection are examiend, and the following conclusion is drawn.
The flow rate of granular materials can be adjusted by aeration. For air injection closer to the orifice and for a smaller particle diameter, a higher flow rate of granular materials can be expected. These relationships are explained by the modified de Jong's and Crewdson's equation, and the experimental data are correlated by a computable equation with an error of ±30%, except for some of small particles for which these relationships are influenced by the adhesion of the particles. For small particles, these relationships are improved by aeration, but are insufficient.