Results and discussions
In the cross-flow moving bed, gas phases exert forces on particles from
gas upstream to gas downstream. The cavity appears at the upstream of
the Johnson net, wherein no particles; the pinning occurs in the
downstream of the bed, wherein particle stop moving downward; the air
lock is seen near the feed tube, when particles cannot feed into bed. In
particular, the theoretical equation of pinning and cavity are
summarized or derived in Appendix . Considering the differences
between the rectangular and radial beds, the abnormal phenomena are
analyzed respectively in this paper.