De-inking
Parason Oxidative Bleach Tower - POBT
The Parason Oxidative Bleach Tower (POBT) is designed to hold high-consistency stock for an adequate retention time, ensuring effective bleaching.
The Parason Oxidative Bleach Tower (POBT) is designed to hold high-consistency stock for an adequate retention time, ensuring effective bleaching.
Oxidative bleaching with controlled retention time
The Parason Oxidative Bleach Tower holds high consistency stock for adequate retention time, enabling effective oxidative bleaching with reduced chemical consumption.
Pulp fed at 24-30% consistency from upstream disperser equipment
Adequate retention time for homogeneous chemical reaction
Stock extracted at 4-4.5% consistency via 4 dilution zones
POBT in combination with Hot Disperser system
0.8 - 1.2% Consistency
Thickening up to 12% consistency with least fibre loss, very efficient deaeration, and slow RPM for less maintenance.
Re-pulps the thickened stock for further processing in the dispersion system.
Achieves high consistency output of 38% - 42% with single piece casting screw design.
Uniformly shreds thickened stock to increase surface area for better steam penetration.
Prevents steam escape, reducing steam consumption and improving dispersing effect.
Heats stock to 90°C - 100°C with steam nozzles throughout for uniform heating.
Feeds the heated stock uniformly to the disperser for consistent processing.
Disperses contaminants in microns at 30% consistency and 100°C with 0.01mm gap control.
Holds high-consistency stock for adequate retention time, ensuring effective oxidative bleaching and brightness improvement.
Newsprint, Writing & Printing, White Grades
Ideal for various paper grades requiring brightness
Connect with our process engineers to explore how the Parason Oxidative Bleach Tower can improve brightness and reduce chemical consumption.
