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Facing the Pressures of Cutting the Maintenance Budget, Paper360º July/August 2023

Evaluating the effect of recovery boiler operation on green liquor dregs concentration using multivariate analysis, TAPPI Journal June 2023

ABSTRACT: Poor settling and filterability of green liquor dregs has been a persistent problem in many kraft pulp mills. While the concentration and settling/filtering behaviors of dregs are expected to be related to how black liquor is burned in recovery boilers, the effect of boiler operation is not well understood. A systematic study was conducted to examine how recovery boiler operation may affect the dregs concentration in the raw green liquor (RGL) at three kraft pulp mills using SIMCA, a multivariate data analysis (MVDA) program. Daily average boiler operating data from three kraft mills were analyzed over a 3-year period. Results of both principal component analysis (PCA) and partial least squares regression (PLS) suggest that the main boiler operations contributing to high dregs concentrations in RGL are low liquor firing load, low bed temperature, poor char burning, and unstable char bed.

Water chemistry challenges in pulping and papermaking • fundamentals and practical insights: Part 2: Conductivity, charge, and hardness, TAPPI Journal June 2023

ABSTRACT: Although water is essential to the papermaking process, papermakers often overlook its importance and focus on fibers, fillers, and chemical additives. A better understanding of water properties and chemical interactions associated with water at the wet end leads to a sound foundation for high-quality paper production and smooth operation. Water is an excellent solvent for ionic substances, both organic and inorganic. These substances contribute to system conductivity, charge, and hardness and significantly impact the papermaking process. Part 1 of this paper, published in TAPPI J. 21(6): 313(2022), discussed fundamental water properties, water chemistry, and the impact of pH on pulping and papermaking operations. In this paper, we review definitions, sources, and the typical symptoms of the effect of conductivity, charge, and hardness on the productivity of the papermaking process. Sources of conductivity, charge, and hardness impacting these factors, measurement methods, and available correction strategies for their control are also discussed.

TAPPI Journal Summaries, Paper360º March/April 2023

TAPPI Journal Summaries, Paper360º March/April 2023

Small Jobs in Maintenance, Paper360º March/April 2023

FBB vs SBS: What Will Demand Look Like in the Next 5 Years?, Paper360º March/April 2023

New Kneading, Washing Technologies Open Door to Advanced Fib

New Kneading, Washing Technologies Open Door to Advanced Fiber Recycling for Tissue Industry, Tissue360º Spring/Summer 2016

TAPPI Journal 2016 Best Research Paper Award: Mining Big Dat

TAPPI Journal 2016 Best Research Paper Award: Mining Big Data to improve pulping and papermaking operations, TAPPI JOURNAL April 2017

Novel thin functional coatings for paper by foam coating, T

Novel thin functional coatings for paper by foam coating, TAPPI JOURNAL April 2017

Guest Editorial: From rocket science to innovation in bioenergy & bioproducts, TAPPI JOURNAL February 2017

Guest Editorial: From rocket science to innovation in bioenergy & bioproducts, TAPPI JOURNAL February 2017