Scaling and Bleaching Chemicals Consumption: A Mill Case, 2002 International Pulp Bleaching Conference Proceedings

Paulo A. Barata and Isabel S. Marques

Portucel changed the filtrate washing circuit in bleach plant from separate acidic/alkaline lines to a countercurrent system with a jump from the last to the first chlorine dioxide stage. This modification resulted in a decrease in scaling in wash diffusers of the Eop stage, improvements in final bleached pulp brightness (0.7% increase), and reduction of bleaching chemical consumption (7-8% less oxidant and a 25% reduction of soda in extraction stages). The pulp acidification prior to D1 stage is no longer needed, which resulted in a decrease of 60% in sulfuric acid consumption. With an investment of 250 thousand euros, an annual return of around 2 million euros was achieved.

Author: Barata, P.A.
Scaling and Bleaching Chemicals Consumption: A Mill Case, 20
Scaling and Bleaching Chemicals Consumption: A Mill Case, 2002 International Pulp Bleaching Conference Proceedings
35.00

New Releases

TAPPI PRESS Catalog eBook 2024


Experience the Power of Publications in the 2024 TAPPI Press Catalog


Open


 

Kraft Recovery Boilers, Third Edition  


Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.


Purchase


 

Handbook For Pulp and Paper Technologists (The SMOOK Book), Fourth Edition

The best-selling text to introduce the entire technology of pulp and paper manufacture.

Purchase

 

Guidelines for Safe Assessment and Operation of Yankee Dryers  


A project of the Yankee Dryer Safety & Reliability Committee.

Purchase

 

Check our newest additions.


TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. 

See More

   
 

Available for Purchase – Conference Proceedings


TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.

See More