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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
Open Access
Optimizing Alkaline Extraction for Eucalyptus Kraft Pulp Bleaching, TAPPI JOURNAL January 2009

Optimizing Alkaline Extraction for Eucalyptus Kraft Pulp Bleaching, TAPPI JOURNAL January 2009

Journal articles
Open Access
An Assessment of Gasification-Based Biorefining at Kraft Pulp and Paper Mills in the United States, Part B: Results, TAPPI JOURNAL January 2009

An Assessment of Gasification-Based Biorefining at Kraft Pulp and Paper Mills in the United States, Part B: Results, TAPPI JOURNAL January 2009

Journal articles
Open Access
Reduction of Organic Pollutants with Recovery of Value-Added Products From Soda Black Liquor of Agricultural Residues by Electrolysis, TAPPI JOURNAL July 2009

Reduction of Organic Pollutants with Recovery of Value-Added Products From Soda Black Liquor of Agricultural Residues by Electrolysis, TAPPI JOURNAL July 2009

Journal articles
Open Access
The Effect of Dead Load Chemicals in the Kraft Pulping and Recovery System, TAPPI JOURNAL July 2009

The Effect of Dead Load Chemicals in the Kraft Pulping and Recovery System, TAPPI JOURNAL July 2009

Journal articles
Open Access
Modeling of the Solubility of Different Inorganic Sodium Salts in Black Liquor Under Varying Conditions, TAPPI JOURNAL March 2009

Modeling of the Solubility of Different Inorganic Sodium Salts in Black Liquor Under Varying Conditions, TAPPI JOURNAL March 2009

Journal articles
Open Access
The Nature of Single Fiber Kappa Distributions, TAPPI JOURNAL March 2009

The Nature of Single Fiber Kappa Distributions, TAPPI JOURNAL March 2009

Journal articles
Open Access
Evaluation of Various Mechanical Pulping Processes for Mature and Juvenile Loblolly Pine in Lightweight Coated Paper, TAPPI JOURNAL March 2009

Evaluation of Various Mechanical Pulping Processes for Mature and Juvenile Loblolly Pine in Lightweight Coated Paper, TAPPI JOURNAL March 2009

Journal articles
Open Access
09MAY03

Editor's Note: Some Fellows You Should Know, TAPPI JOURNAL May 2009

Journal articles
Open Access
Determination of Wet Fiber Strength, TAPPI JOURNAL May 2009

Determination of Wet Fiber Strength, TAPPI JOURNAL May 2009

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