Patent ID: 6618956
Filing Date: 2003-09-16
Classification: B04B,F26B

Abstract:
A device for dewatering and drying suspensions, comprising:a base frame; a centrifuge mounted on the base frame and having a rotating drum with a rotating jacket surface, an entrance zone and a discharge zone, wherein the suspension is supplied as a thin mass to the entrance zone, and a pre-dewatered suspension is spun, as a solid in dispersed-particle form with a dry-substance content in a range of about 15 to about 35 weight percent, to the discharge zone, a drying device for convection-drying the spun solid particles, the drying device including a stationary drier housing at least partially surrounding the rotating drum of the centrifuge and having two axial ends, and a hot-gas generator adapted for conducting hot gas through the stationary drier housing in order to subject dispersed solid particles to a brief drying of a few seconds on their flight path until they exit the drier housing, wherein the stationary drier housing is limited on its radial inside by the rotating jacket surface of the centrifuge, on its radial outside by a cylinder wall and on its end sides by radial end walls; and a multi-stage sealing system comprising rotary seals and elastic or displaceable sealing elements, against the stationary end walls of the drier housing, a sealing ring disposed at each of two axial ends of the drier housing, thereby forming an axial gap from the respectively-adjacent end wall of the drier housing, the sealing ring is being mounted to the base frame, thereby forming a seal gap that extends around the rotating jacket surface of the centrifuge, with each seal gap being sealed by one of the rotary seals, and the axial gap between each sealing ring and the respectively-adjacent end wall of the drier housing is being sealed by the elastic or displaceable sealing elements.