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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
Development and validation of an improved drainage testing, TAPPI JOURNAL, April 2000, Vol. 83(4)

Development and validation of an improved drainage testing, TAPPI JOURNAL, April 2000, Vol. 83(4)

Journal articles
Open Access
High temperature chlorine dioxide bleaching of hardwood kraft pulp, TAPPI JOURNAL, August 2000, Vol. 83(8)

High temperature chlorine dioxide bleaching of hardwood kraft pulp, TAPPI JOURNAL, August 2000, Vol. 83(8)

Journal articles
Open Access
Activation of alkaline peroxide delignification using a vanadium peroxo complex, TAPPI JOURNAL, June 2000, Vol. 83(6)

Activation of alkaline peroxide delignification using a vanadium peroxo complex, TAPPI JOURNAL, June 2000, Vol. 83(6)

Journal articles
Open Access
Chlorine dioxide bleaching kinetics of hardwood kraft pulp, TAPPI JOURNAL, June 2000, Vol. 83(6)

Chlorine dioxide bleaching kinetics of hardwood kraft pulp, TAPPI JOURNAL, June 2000, Vol. 83(6)

Journal articles
Open Access
Electrically switched ion exchange (esix) for the removal of potassium to enhance water recycle opportunities, TAPPI JOURNAL, June 2000, Vol. 83(6)

Electrically switched ion exchange (esix) for the removal of potassium to enhance water recycle opportunities, TAPPI JOURNAL, June 2000, Vol. 83(6)

Journal articles
Open Access
Effect of dtpa and edta on activated sludge reactors treating bleached kraft mill effluent, TAPPI JOURNAL, June 2000, Vol. 83(6)

Effect of dtpa and edta on activated sludge reactors treating bleached kraft mill effluent, TAPPI JOURNAL, June 2000, Vol. 83(6)

Journal articles
Open Access
Nox reduction in black liquor combustion — reaction mechanisms reveal novel operational strategy options, TAPPI JOURNAL, June 2000, Vol. 83(6)

Nox reduction in black liquor combustion — reaction mechanisms reveal novel operational strategy options, TAPPI JOURNAL, June 2000, Vol. 83(6)

Journal articles
Open Access
A study of gas holdup in a cocurrent air/water/fiber system, TAPPI JOURNAL, June 2000, Vol. 83(6)

A study of gas holdup in a cocurrent air/water/fiber system, TAPPI JOURNAL, June 2000, Vol. 83(6)

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