FORFARANDE FOR METNING AV FIBER- OCH FYLLMEDELSKONCENTRATIONEN I EN PAPPERSMASKINS VATDEL SAMT FORFARANDET UTNYTTJANDE REGLERSYSTEM

摘要

Optical transducer output signals from each concentration measurement are combined on the basis of characteristics determined experimentally prior to measurement. This produces a separate valve of the fibre concentration/solid matter concentration concentration and a separate valve of the filler concentration. - The addition of retention agent to the head box of the paper machine is controlled as function of the calculated retention values.