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Journal articles
Effects of variability of wood chip composition on recovery cycle operation, TAPPI Journal January 2026
ABSTRACT: Fluctuations in wood chip properties in kraft pulp mills, which often follow seasonal patterns, can lead to changes or disruptions in the operation of the recovery cycle whereby the root causes are not immediately obvious. In some cases, these changes are attributed to operational adjustments in the digester or brownstock washing areas resulting from the variability in wood characteristics. Varying wood chip characteristics that have the most significant impact on the recovery cycle operation include the content of non-process elements (NPEs), extractives, and properties influenced by chip storage conditions. Elevated levels of NPEs, often associated with a higher influx of wood bark into the digester, can negatively affect the entire recovery cycle. Increased levels of chlorine and potassium can lead to severe fouling and corrosion in the recovery boiler. Higher concentrations of silicon, aluminum, phosphorus, magnesium and calcium in the chips may accelerate scaling in the evaporation plant, impair dregs and lime mud settling and filtering, reduce lime mud solids content and lime availability, and increase the amounts of dregs, grits, and purged lime mud. This technical review provides an overview of the most significant effects that changes in wood chip quality can potentially exert on various processes within the kraft recovery cycle.
Journal articles
The use of xylanases in kraft pulp bleaching: a review, TAPPI JOURNAL, June 1994, Vol. 77(6)
The use of xylanases in kraft pulp bleaching: a review, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Stainless steel piping for pulp handling and chemical recovery, TAPPI JOURNAL, June 1994, Vol. 77(6)
Stainless steel piping for pulp handling and chemical recovery, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Bleaching Mixed Office Waste to High Brightness, TAPPI JOURNAL, March 1994, Vol. 77(3)
Bleaching Mixed Office Waste to High Brightness, TAPPI JOURNAL, March 1994, Vol. 77(3)
Journal articles
Initial validation of a mathematical model of cold flow in a recovery boiler, TAPPI JOURNAL, May 1994, Vol. 77(5)
Initial validation of a mathematical model of cold flow in a recovery boiler, TAPPI JOURNAL, May 1994, Vol. 77(5)
Journal articles
Bleach plant closeup and conversion to tcf: a case study using mill data and computer simulation, TAPPI JOURNAL, November 1994, Vol. 77(11)
Bleach plant closeup and conversion to tcf: a case study using mill data and computer simulation, TAPPI JOURNAL, November 1994, Vol. 77(11)
Journal articles
Pilot-plant experience with ozone in tcf bleaching of eucalypt pulp, TAPPI JOURNAL, November 1994, Vol. 77(11)
Pilot-plant experience with ozone in tcf bleaching of eucalypt pulp, TAPPI JOURNAL, November 1994, Vol. 77(11)
Journal articles
Catalytic oxygen bleaching of wood pulp with metal porphyrin and phthalocyanine complexes, TAPPI JOURNAL, November 1994, Vol. 77(11)
Catalytic oxygen bleaching of wood pulp with metal porphyrin and phthalocyanine complexes, TAPPI JOURNAL, November 1994, Vol. 77(11)
Journal articles
A comparison of chlorinated phenolic compound concentrations and loadings in bleach-plant and treatment-system samples at eight mills, TAPPI JOURNAL, November 1994, Vol. 77(11)
A comparison of chlorinated phenolic compound concentrations and loadings in bleach-plant and treatment-system samples at eight mills, TAPPI JOURNAL, November 1994, Vol. 77(11)
Journal articles
The impact of web oven parameters on 20 degrees print gloss, TAPPI JOURNAL, October 1994, Vol. 77(10)
The impact of web oven parameters on 20 degrees print gloss, TAPPI JOURNAL, October 1994, Vol. 77(10)