半径方向に粒度分布があるときの向流移動層の圧力損失
1973 年 59 巻 1 号 p. 46-54
詳細
1973 年 59 巻 1 号 p. 46-54
Characteristics of pressure drop, gas velocity distribution and solids movement in countercurrent moving bed with radial distribution were studied.
Following results were obtained:
1. Radial mixing of particles in bed was not observed up to the channeling state. The effect of descend ing motion of particles on the pressure drop was not observed clearly. However, the pressure drop was found to be remarkably affected by the variation of radial distribution of void fraction.
2. Except for the upper layer, the pressure drop per unit bed height was found to be constant along the height of bed.
3. The pressure drop was found to vary considerably depending on the size combination of charged in center and periphery. It seemed that radial distribution of gas velocity was built up so as to realize uni form radial distribution of pressure and minimum pressure drop.
4. The gas velocity distribution was observed to correspond to radial distribution of particle size and to become more uniform with increasing rate of gas flow.
