OUTLET DEVICE WITH AN INTRASEAL FOR A PRESSURIZED VESSEL

摘要

A shaft outlet assembly for a digester is disclosed that includes: a rotatable shaft extending from the outlet assembly into a pressurized of the digester; a pack box mounted on the digester and having packing around the shaft, and a sealing ring mounted on a movable assembly inside of the pressure vessel, the sealing ring encircling the shaft, said movable assembly having a first position providing a nominal clearance between the sealing ring and shaft, and a second position at which the sealing ring is against the shaft and pack box to provide a substantially fluid-tight seal between said pack box and the shaft.