Search

Use the search bar or filters below to find any TAPPI product or publication.

Showing 1,371–1,380 of 1,846 results (Duration : 0.01 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Collections

Journal articles
Open Access
In-situ reduction of fibrous sludge in a pulp mill aerated stabilization basin, TAPPI JOURNAL May 2005, Vol. 4(5)

In-situ reduction of fibrous sludge in a pulp mill aerated stabilization basin, TAPPI JOURNAL May 2005, Vol. 4(5)

Journal articles
Open Access
Inorganic scale buildup in a bleach plant a mill case study, TAPPI JOURNAL, November 2005, Vol. 4(11) (168 KB)

Inorganic scale buildup in a bleach plant a mill case study, TAPPI JOURAL, November 2005, Vol. 4(11) (168 KB)

Journal articles
Open Access
Laboratory- and mill-scale study of surfactant spray flotation deinking, TAPPI JOURNAL, October 2005, Vol. 4(10) (216 KB)

Laboratory- and mill-scale study of surfactant spray flotation deinking, TAPPI JOURNAL, October 2005, Vol. 4(10) (216 KB)

Journal articles
Magazine articles
Open Access
Understanding the risks and rewards of using 50% vs. 10% strength peroxide in pulp bleach plants, TAPPI Journal November 2018

Authors: Alan W. Rudie and Peter W. Hart | ABSTRACT: The use of 50% concentration and 10% concentration hydrogen peroxide were evaluated for chemical and mechanical pulp bleach plants at storage and at point of use. Several dangerous occurrences have been documented when the supply of 50% peroxide going into the pulping process was not stopped during a process failure. Startup conditions and leaking block valves during maintenance outages have also contributed to explosions. Although hazardous events have occurred, 50% peroxide can be stored safely with proper precautions and engineering controls. For point of use in a chemical bleach plant, it is recommended to dilute the peroxide to 10% prior to application, because risk does not outweigh the benefit. For point of use in a mechanical bleach plant, it is recommended to use 50% peroxide going into a bleach liquor mixing system that includes the other chemicals used to maintain the brightening reaction rate. When 50% peroxide is used, it is critical that proper engineering controls are used to mitigate any risks.

Journal articles
Magazine articles
Open Access
Using multistage models to evaluate how pulp washing after the first extraction stage impacts elemental chlorine-free bleach demand, TAPPI Journal November 2018

Using multistage models to evaluate how pulp washing after the first extraction stage impacts elemental chlorine-free bleach demand, TAPPI Journal November 2018

Journal articles
Open Access
Nutrient limited biofilm pretreatment - an efficient way to upgrade activated sludge plants, TAPPI JOURNAL, June 2002 (131KB)

Nutrient limited biofilm pretreatment - an efficient way to upgrade activated sludge plants, Solutions! & TAPPI JOURNAL, June 2002 (131KB)

Journal articles
Subscription Access
Non-sulfur semichemical pulping of a red oak and wheat straw mixture, TAPPI JOURNAL, May 2002, Vol. 1(3) (322KB)

Non-sulfur semichemical pulping of a red oak and wheat straw mixture, TAPPI JOURNAL, May 2002, Vol. 1(3) (322KB)

Journal articles
Open Access
Production of acetate-grade pulps by organic acid pulping and TCF bleaching, Solutions! & TAPPI JOURNAL, May 2002 (118KB)

Production of acetate-grade pulps by organic acid pulping and TCF bleaching, Solutions! & TAPPI JOURNAL, May 2002 (118KB)

Journal articles
Open Access
Metals buildup in TCF bleach plant closure: laboratory simulation, SOLUTIONS! & TAPPI JOURNAL, May 2002 (208KB)

Metals buildup in TCF bleach plant closure: laboratory simulation, SOLUTIONS! & TAPPI JOURNAL, May 2002 (208KB)

Journal articles
Magazine articles
Open Access
Modeling of the energy of a smelt-water explosion in the recovery boiler dissolving tank, TAPPI Journal August 2020

ABSTRACT: The explosion energy generated as molten smelt droplets interact with water was evaluated as a function of smelt distribution, water temperature, and smelt temperature using a thermodynamic model. The results show that increasing smelt-to-water volume ratio and water temperature significantly increases the explosion energy, converting a larger proportion of the thermal energy of smelt into mechanical work. To reduce the chance of violent smelt-water explosions, it is important to: i) optimize the shatter jet design and operation to uniformly distribute the smelt over a large area in the dissolving tank; ii) avoid high green liquor temperature and ensure adequate liquor mixing; and iii) avoid upsets that may cause heavy smelt runoff or jellyroll smelt.

Inside this Section