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Journal articles
Open Access
Image classification of the furnace bed height in recovery boilers, TAPPI Journal July 2026

ABSTRACT: The goal of this study is to develop an approach for classifying char bed height in a recovery boiler during operation. The resulting classified images form a dataset that can be used by the mill to support operational improvements. The study integrates data from the digester, evaporation plant, recovery boiler, and recausticizing plant, along with the classified image data. A convolutional neural network (CNN) was trained on bed camera images that were manually annotated to classify furnace bed height. The model was then used to generate a binary bedheight parameter over a 16-month period, and an extreme gradient boosting (XGBoost) model was applied to identify relationships with operating parameters across the recovery cycle. The outcomes of this research may offer deeper insights into the processes underlying bed dynamics. Ultimately, the developed system may serve as a tool for optimizing bed conditions and supporting stable combustion.

Journal articles
Open Access
Guest Editorial: Carrying forward the tradition of fundamental research, TAPPI Journal June 2026

Since its first symposium in 1957, the Fundamental Research Symposium has evolved around fundamental research themes aimed at scientifically understanding papermaking. The symposium is organized by the Fundamental Research Committee (FRC), which is operated by the Fundamental Research Society (FRS). The unique format of the symposium, held at universities such as Oxford and Cambridge where participants stay together, fosters intensive academic exchange and collegial interaction.

Journal articles
Open Access
Dimensioning a recovery boiler furnace using mathematical optimization 15FEB119

Dimensioning a recovery boiler furnace using mathematical optimization, TAPPI JOURNAL February 2015

Journal articles
Open Access
Mill study on improving lime kiln efficiency 15FEB133

Mill study on improving lime kiln efficiency, TAPPI JOURNAL February 2015

Journal articles
Open Access
Editorial: 2014 International Conferences • Fiber processing

Editorial: 2014 International Conferences • Fiber processing, chemicals & energy, asset management, regulations, and industry sustainability issues, TAPPI JOURNAL February 2015

Journal articles
Open Access
Improved steady-state models for chlorine dioxide delignification sequences that include washer carryover effects 15-Feb-93

Improved steady-state models for chlorine dioxide delignification sequences that include washer carryover effects, TAPPI JOURNAL February 2015

Journal articles
Open Access
Life cycle assessment of ECF bleaching sequences with ocus on carbon footprint 15-Jan-17

Life cycle assessment of ECF bleaching sequences with focus on carbon footprint, TAPPI JOURNAL January 2015

Journal articles
Open Access
Understanding recovery boiler smelt runoff phenomena 15-Jan-41

Understanding recovery boiler smelt runoff phenomena, TAPPI JOURNAL January 2015

Journal articles
Open Access
Editorial: 2014 International Conferences • Part 2: Focus on the Liquor Cycle, TAPPI JOURNAL July 2015

Editorial: 2014 International Conferences • Part 2: Focus on the Liquor Cycle, TAPPI JOURNAL July 2015

Journal articles
Open Access
Flexible pretreatment technology supports production of biobased co-products at pulp and paper mills, TAPPI JOURNAL 2015 March - 15MAR179

Flexible pretreatment technology supports production of biobased co-products at pulp and paper mills, TAPPI JOURNAL March 2015

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