METHOD FOR CONTROLLING THE ADDITION OF BLEACHING REAGENTS TO OBTAIN A SUBSTANTIALLY CONSTANT PERCENTAGE OF PULP DELIGNIFICATION ACROSS THE FIRST BLEACHING/DELIGNIFYING STAGE

摘要

The present application describes a method for controlling the addition ofbleaching/delignifying reagents to obtain a substantially constant percentageof pulpdelignification across the first bleaching stage. The present method allowssubstantialimprovements in bleached pulp quality through proper addition of thebleaching/delignifying reagent flow rate. The efficiency of thebleaching/delignifyingreagent is therefore greatly improved. Further, reduction of pulp off-grades,equipmentcorrosion and effluent loading are additional beneficial effects resultingfrom the presentinvention.