Patent ID: 6266895
Filing Date: 2001-07-31
Classification: F26B

Abstract:
An apparatus for drying a particulate material in superheated steam comprising:a closed vessel (1) configured as a body of rotation, said vessel (1) having a lower cylindrical part having a conical transition piece connected to an upper cylindrical part of larger diameter than the lower cylindrical part, said vessel (1) having a central part with a heat exchanger (3) having thereunder a transport element for steam in the form of a blower (6), the vessel having a number of upwardly open, elongated and substantially vertical processing cells (2) which are placed around the central part with the heat exchanger (3), a last (4) of these processing cells (2) having a closed bottom and being a discharge cell (4), the remaining cells (2) having a bottom (5) through which steam can permeate, the processing cells (2) which lie at the side of one another being open at a top opposite a common transfer zone (13), and at the bottom being in mutual connection through openings (11) at the lowermost ends of the cells, the particulate material introduced into the first of the processing cells (2) passing by the superheated steam, which is blown up through the steam-permeable bottoms (5), the particulate material being dried during its passage through the processing cells (2), the particulate material passing from one processing cell (2) to the next through said openings (11), said discharge cell (4) and/or said processing cell or cells (2), which lie adjacent to the discharge cell (4), having baffle means for restraining the amount of particulate material which passes from one processing cell (2) to the next processing cell(2) or to the discharge cell (4).