The Operating Experience after Continuous Digester Improvement

Abstract

Hachinohe Mill, Mitsubishi Paper has the capacity 900,000 ton of papers per year. We have one continuous digester and four batch digester to produce kraft pulp in Hachinohe Mill. The continuous digester can supply about 80% of the kraft pulp produced at the mill.
We improved the continuous digester to increase production in August, 2007 and introduced the new chip bin and other equipment.
This report is described about the operating experience after continuous digester improvement.