Patent ID: 8349136

Claim:
A method for optimizing an energy balance in a forming section in a machine for producing a web of fibrous material, the web being one of a paper web, a cardboard web, and a tissue web, said method comprising the steps of: providing a plurality of dewatering units; feeding a fibrous stock suspension into the forming section through a headbox; passing said fibrous stock suspension, after having reached an immobility point, through at least two of said plurality of dewatering units, and then passing said fibrous stock suspension to a transfer area and then to a following functional unit, said at least two of said plurality of dewatering units being inside a compression zone following said immobility point; predefining, depending upon a theoretically achievable maximum dry content achievable during a plurality of operational conditions in said transfer area where the web is transferred to said following functional unit, and based on available ones of said plurality of dewatering units, a desired value for a target dry content which is adjustable and which is selected so that said target dry content is smaller than said theoretically achievable maximum dry content but one of equal to and greater than a minimum dry content required in an area of the machine associated with said transfer area; and controlling said target dry content by reducing an incoming dry content on one of a last three ones of said plurality of dewatering units viewed in a direction of travel of said fibrous stock suspension inside said compression zone.