Abstract: This invention relates to a device at presses for dewatering materials such as peat, digested sludge and other fiber material, which device comprises a belt, which in cooperation with at least one press roll is arranged to apply a press pressure to a material introduced between belt an roll. Certain problems exist here in achieving a high and evenly distributed press pressure over the whole belt width, but this and other problems are solved according to the invention in such a way that the belt consists of a number of separate belt elements (19) located beside each other, each with a cross sectional form decreasing from the side (20) facing the material and with edge portions (23) being in contact with each other, which portions are so elastic that they are opened by the material exposed to the press pressure for discharge of water pressed out of the material.

Abstract: This invention relates to a process and a device for treatment, comprising at least drying, of preferably peat and the object thereof is reduction of the moisture percentage to the lowest possible level with a low supply of energy and simultaneously making the peat so compact in dried state that it can be easily stored, conveyed and handled and does not give off dust. According to the invention the material (13) to be dried is heated to such an extent that the water therein will boil and vaporize, the vapour formed being carried away from the material by means of air (15) streaming through this, which air is led to a heat exchanger (20) for heating supply air from outside, which is utilized to form the air stream (15) through the material, and for heating of the combustion air to a combustion furnace (8), the fumes (11) of which are utilized for heating the material.