Patent ID: 6792331
Filing Date: 2004-09-14
Classification: D21F

Abstract:
A method for controlling the drying process taking place in a dryer section of a paper machine comprising the steps of:calculating a total amount of drying power required in the dryer section; dividing the dryer section into at least a first drying segment, and a second drying segment, which differ in their drying action and apportioning the total amount of drying power between said first drying segment and said second drying segment so as to provide a drying distribution for providing a drying process maximizing quality, wherein at least said second drying segment includes two dryer units using different forms of energy; and wherein the proportion of the total amount of drying power apportioned to said second of said drying segments is divided according to said two different forms of energy between the at least two dryer units therein so that the sum of energy costs in said second drying segment is minimized.