Abstract
In the cross-flow moving bed, the gas-solid cross-flow pattern
facilitates its high gas process capacity under relatively low pressure
drop. In this paper, a structural optimization of gas-solid baffles, is
proposed to enhance the bed operating flexibility by controlling the
abnormal phenomena of cavity, pinning and air lock. According to
experimental data, the relevant equations for predicting the occurrence
of the abnormal phenomena are derived to explain the effects of the
gas-solid baffles. It turns out that, with this proposed optimization,
the cavity and pinning are weakened in both rectangular and radial beds;
the air lock can be easily controlled by increasing the height and
diameter of feed tube. The preferred gas-solid baffles is in the middle
position (x/L=0.5) of the rectangular bed and/or
(r-r1)/(r2-r1)<0.5 of the radial bed under different gas
superficial velocities, particle diameters and bed voidages.