Horizontal fluidized-bed dryer with heat transfer tubes

摘要

In a horizontal fluidized-bed dryer, at least one rotatable hollow axle (8) extends horizontally through a drying chamber (1) over a porous supporting shelf (4) and has a heat transfer tube assembly (7) mounted on and around the holow axle (8) for fluid communication therewith. A spiral or screw-shaped blade (9) is mounted on the heat transfer tube assembly (7) so as to be disposed around the periphery of an imaginary cylindrical figure generated by rotation of the heat transfer tube assembly (7) about the hollow axle (8). This blade serves to push large particles of wet feed on the supporting shelf (4) from the inlet side to the outlet side as the hollow axle (8) and thus the heat transfer tube assembly (7) are rotated.