3.2. Pinning, cavity and air lock in radial bed
Compared to rectangular bed, the gas processing capacity is further increased in the radial bed. It makes the radial bed has unique advantages in industrial utilization. Based on the above analysis, some abnormal phenomena are controlled by gas-solid baffles in rectangular bed. It may have similar effects in the radial bed. However, in the rectangular bed, the best location of the baffles will be in the middle of the bed for its gas symmetrical flows; in the radial bed, the best location is not in the middle of the bed for its gas asymmetrical flows.
Thus, the further research is mainly focused on the investigation of the gas-solid flow in the radial bed of type CA and CB, especially the best location of the baffles.
3.2.1 Pressure distribution under different gas flow rates
In the radial bed, the pressure drop increases with the gas superficial velocity, which can be roughly calculated by equation (9). In particular,in semi-cylindrical radial bed and in cylindrical radial bed.
(9)