process and device for wet to dry materials such as paper, cellulose fiber, and other materials, and other products of the same kind

摘要

A method and means for drying moist material in which heat from a source of heat is supplied at least partially to one side of a porous layer, the pores of which are capable of conducting vapor. The moist material is in contact with the opposite side of the porous layer, so that due to the heat from the source of heat the moisture in said moist material is vaporized to vapor which thus is generated as a result of evaporation of moisture in said moist material and is at least partially forced into and through said porous layer in a direction opposite to that of the temperature gradient caused by heat supplied mainly by means of thermal conductivity from the source of heat to the porous layer through a homogeneous, heat-conducting wall. The wall is arranged in at least partial heat-conducting contact with the porous layer and defines a partition between the porous layer and the source of heat, blocking the passage of steam through said porous layer. The generated vapor is discharged in direction mainly perpendicular to said temperature gradient.