METHOD OF DRYING LIGNOCELLULOSE MATERIAL

摘要

A method of drying lignocellulosic fibrous material in two steps in connecti on with the manufacture of fiberboard. The material is transported with the hel p of a first drying gas through a first drying line (11) to a first cyclone (1 3) where the first drying gas is conducted away from the material. Thereafter t he material is transported with the help to a second drying gas through a secon d drying line (17) of a second cyclone (19) where the second drying gas is conducted away while the material is advanced to a subsequent step. The seco nd drying gas, which is conducted away from the second cyclone (19), is moved t o the first drying step and used as a portion of the first drying gas. A porti on of the first drying gas, which is conducted away from the first cyclone (13) , is reclycled and used as drying gas at the first drying step.