Modern Digester Configurations – SuperBatch Cooking. Conventional Batch Cooking Problems. Poor cooking uniformity Cannot cook to a desired (low) kappa number without sacrificing pulp strength and/or yield. Basis for improvements:.
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Intensive HBL treatment allows for improved H-factor/kappa relationship
SuperBatch pulps exhibit higher strength properties than conventional batch pulps.
Lower kappas can be expected at the same relative H-factors.
Improved within-chip kappa variability