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Journal articles
Magazine articles
Open Access
Kraft recovery boiler operation with splash plate and/or beer can nozzles — a case study, TAPPI Journal Octobr 2021

ABSTRACT: In this work, we study a boiler experiencing upper furnace plugging and availability issues. To improve the situation and increase boiler availability, the liquor spray system was tuned/modified by testing different combinations of splash plate and beer can nozzles. While beer cans are typically used in smaller furnaces, in this work, we considered a furnace with a large floor area for the study. The tested cases included: 1) all splash plate nozzles (original operation), 2) all beer can nozzles, and 3) splash plate nozzles on front and back wall and beer cans nozzles on side walls. We found that operating according to Case 3 resulted in improved overall boiler operation as compared to the original condition of using splash plates only. Additionally, we carried out computational fluid dynamics (CFD) modeling of the three liquor spray cases to better understand the furnace behavior in detail for the tested cases. Model predictions show details of furnace combus-tion characteristics such as temperature, turbulence, gas flow pattern, carryover, and char bed behavior. Simulation using only the beer can nozzles resulted in a clear reduction of carryover. However, at the same time, the predicted lower furnace temperatures close to the char bed were in some locations very low, indicating unstable bed burning. Compared to the first two cases, the model predictions using a mixed setup of splash plate and beer can nozzles showed lower carryover, but without the excessive lowering of gas temperatures close to the char bed.

Journal articles
Open Access
Biofiltration of a-pinene and its application to the treatment of pulp and paper air emissions, TAPPI JOURNAL, August 1998, Vol. 81(8)

Biofiltration of a-pinene and its application to the treatment of pulp and paper air emissions, TAPPI JOURNAL, August 1998, Vol. 81(8)

Journal articles
Open Access
1997 tappi salary survey, TAPPI JOURNAL, August 1998, Vol. 81(8)

1997 tappi salary survey, TAPPI JOURNAL, August 1998, Vol. 81(8)

Journal articles
Open Access
The effects of coated magazines on deinking of newsprint after pulping and flotation, TAPPI JOURNAL, December 1998, Vol. 81(12)

The effects of coated magazines on deinking of newsprint after pulping and flotation, TAPPI JOURNAL, December 1998, Vol. 81(12)

Journal articles
Open Access
Deinking with enzymes: a review, TAPPI JOURNAL, December 1998, Vol. 81(12)

Deinking with enzymes: a review, TAPPI JOURNAL, December 1998, Vol. 81(12)

Journal articles
Open Access
New technology for papermaking: biopulping economics, TAPPI JOURNAL, December 1998, Vol. 81(12)

New technology for papermaking: biopulping economics, TAPPI JOURNAL, December 1998, Vol. 81(12)

Journal articles
Open Access
Quality control of high-consistency refiners, TAPPI JOURNAL, December 1998, Vol. 81(12)

Quality control of high-consistency refiners, TAPPI JOURNAL, December 1998, Vol. 81(12)

Journal articles
Open Access
21st century pulp mills, TAPPI JOURNAL, December 1998, Vol. 81(12)

21st century pulp mills, TAPPI JOURNAL, December 1998, Vol. 81(12)

Journal articles
Open Access
Global warming and climate change: strategic positioning for the pulp and paper industry, TAPPI JOURNAL, December 1998, Vol. 81(12)

Global warming and climate change: strategic positioning for the pulp and paper industry, TAPPI JOURNAL, December 1998, Vol. 81(12)

Journal articles
Open Access
Effect of Enzyme Pretreatments on Conventional Kraft Pulping, TAPPI JOURNAL, February 1998, Vol. 81(2)

Effect of Enzyme Pretreatments on Conventional Kraft Pulping, TAPPI JOURNAL, February 1998, Vol. 81(2)

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