METHOD AND SYSTEM FOR EFFICIENT PRODUCTION OF DISSOLVING PULP IN A KRAFT MILL PRODUCING PAPER GRADE PULP WITH A CONTINUOUS TYPE DIGESTER

摘要

A method for producing pulp using a continuous digester which includes supplying organic fiber-containing material to a vertical pressure vessel system. The method also includes performing pre-hydrolysis and neutralization in a batch mode on the organic fiber-containing material in the vertical pressure vessel system. The method further includes providing the contents of the vertical pressure vessel system to a continuous digester after pre-hydrolysis and neutralization, and performing kraft cooking with the continuous digester to produce a brownstock for dissolving pulp.