Patent ID: 6415527
Filing Date: 2002-07-09
Classification: F26B

Abstract:
A steam dryer, in particular a steam dryer intended for drying of concentrate materials, which dryer comprises a cylindrical, rotatable drum (11), in whose interior a set of steam pipes (12) having a number of pipe elements has been fitted to revolve along with the drum, which pipe elements can be separately detached from the drum (11) and separately installed into the drum, into which set of steam pipes (12) the steam intended for drying of the material has been arranged to be supplied by means of a steam distributor header (17) fitted at a first end (10A) of the dryer coaxially with the drum (11), and in which steam dryer (10), at an opposite end (10B), a conveyor (16) has been installed to supply the material to be dried into the drum (11) interior, from where the dried material (25) has been arranged to be discharged through the first end (10A) of the dryer, characterized in that each of the pipe elements in the set of steam pipes (12) is composed of two axial pipes (12a, 12aâ€²) parallel to a longitudinal direction of the drum (11) and of a number of pipe arcs (12b) fitted in a cross direction of the drum (11) and at a distance from one another in the longitudinal direction of the drum, which pipe arcs interconnect the two axial pipes of each pipe element, and the axial pipes (12a, 12aâ€²) of each pipe element have been connected to the steam header (17) so as to feed steam meant for drying into the pipe elements, and, in a corresponding way, to remove a condensate from the pipe elements through the steam header (17).