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Journal articles
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Open Access
Mill experience of calcium carbonate scale formation in green liquor pipelines, TAPPI Journal August 2020

ABSTRACT: Experience of hard calcite (CaCO3) scale formation in green liquor pipelines at four kraft pulp mills was systematically investigated to determine if there is any correlation between the severity of the scaling problem at each mill and the design and operating conditions of its causticizing plant. The results show that the high degree of supersaturation of calcium ions (Ca2+) in the liquor is the main contributing factor. Mills that operate at a lower green liquor total titratable alkali (TTA), higher causticity, and a larger liquor temperature drop are more likely to produce a green liquor that is supersaturated with Ca2+, and thus experience more severe scaling problems. In order to minimize CaCO3 scaling, the green liquor handling equipment should be operated as steady as possible to avoid conditions that allow Ca2+ to be supersaturated. The strategies include minimizing variations in liquor TTA, insulating the green liquor pipelines to reduce temperature gradients, and adding lime mud to weak wash to provide seeds for precipitation to occur on mud particles instead of on metal substrate.

Journal articles
Magazine articles
Open Access
Combustion behavior of kraft black liquor droplets from hot

Combustion behavior of kraft black liquor droplets from hot water pretreated hardwood and softwood chips, November 2016 TAPPI JOURNAL

Journal articles
Open Access
Impact of TMP refining line interruptions and reject refiner operations on pulp and paper variability, TAPPI JOURNAL December 2007

Impact of TMP refining line interruptions and reject refiner operations on pulp and paper variability, TAPPI JOURNAL December 2007

Journal articles
Open Access
Application of lipase to reduce ONP flotation rejects: Part 2. Reduction of flotation rejects, TAPPI JOURNAL, August 2008

Application of lipase to reduce ONP flotation rejects: Part 2. Reduction of flotation rejects, TAPPI JOURNAL, August 2008

Journal articles
Open Access
Influence of pulp refining on tissue paper properties, TAPPI JOURNAL August 2008

Influence of pulp refining on tissue paper properties, TAPPI JOURNAL August 2008

Journal articles
Open Access
Pressure Screen Capacity-Current Findings on the Role of Wire Width and Height, TAPPI JOURNAL, January 2007

Pressure Screen Capacity-Current Findings on the Role of Wire Width and Height, TAPPI JOURNAL, January 2007

Journal articles
Open Access
Filtration properties of lignin precipitated from black liquor, TAPPI JOURNAL, July 2007

Filtration properties of lignin precipitated from black liquor, TAPPI JOURNAL, July 2007

Journal articles
Open Access
Modeling pulp fiber suspension rheology, TAPPI JOURNAL, July 2007

Modeling pulp fiber suspension rheology, TAPPI JOURNAL, July 2007

Journal articles
Open Access
Optimization of the Enzymatic Activation of a Dissolving Pulp Before Viscose Manufacture, TAPPI JOURNAL, June 2007

Optimization of the Enzymatic Activation of a Dissolving Pulp Before Viscose Manufacture, TAPPI JOURNAL, June 2007

Journal articles
Open Access
Impact of Deadload Reduction in the Kraft Chemical Recovery System, TAPPI JOURNAL, June 2007

Impact of Deadload Reduction in the Kraft Chemical Recovery System, TAPPI JOURNAL, June 2007

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