METHOD AND DEVICE FOR CONTROLLING THE SOLIDS PROFILE OF A WEB IN A WIRE SECTION OF A PAPER/BOARD MACHINE

摘要

The invention relates to a method for controlling the solids profile of a web in a paper/board machine in a wire section in which a slice jet of a headbox (10) of the paper/board machine is discharged to the wire section (12). The wire section comprises a wire/wires (16, 20) and dewatering units (13). In the method, the wire section (12) is provided with fibre mobility sensors (S) which are used for measuring the cross-direction fibre mobility profile in the wire section (12), and the solids profile of the web is determined based on the fibre mobility profile, said solids profils being adjusted based on the fiber mobility profile. The invention also relates to a device for controlling the solids profile of a web in a paper/board machine in a wire section which is provided with a dewatering profilign device (17). The dewatering profiling device (17) is arranged to control dewatering in the cross direction substantially across the width of the wire section (12) and that means for measuring fibre mobility are fitted in connection with the wire section (12).