気中攪拌型微粒子分散機の分散性能に対する粉体供給流量およびインペラー回転数の影響

抄録

An experimental study of the performance of a mixer-type particle disperser was carried out with particular attention to the effect of the rotational speed of the impeller and powder feed rate. The operational ranges for obtaining fully dispersed aerosol flow were also investigated.
The aerosol flow discharged from the disperser was classified into three modes: homogeneous, degenerate, and slug-flow depending on the operational conditions. It was found that fully dispersed aerosol was obtained only when the flow was homogeneous. It was also found that the amount of particles deposited on the inside wall increased with decrease in the impeller's rotational speed and/or increase in the powder feed rate, and the mode of the deposition gradually changed from speckled to layered deposition through wavy deposition. The disperser should be operated under the speckled deposition-mode so as to obtain fully dispersed aerosol flow.