Search

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.

ASPI News, Paper360º September/October 2023

SetPoint: Be Fascinated, Tissue360º Spring/Summer 2023

SetPoint: Be Fascinated, Tissue360º Spring/Summer 2023

Tissue Industry News, Tissue360º Spring/Summer 2023

Tissue Industry News, Tissue360º Spring/Summer 2023

Building Information Modeling for Projects in the Tissue Industry, Tissue360º Spring/Summer 2023

Tissue Industry News, Tissue360º Fall/Winter 2022

Tissue Industry News, Tissue360º Fall/Winter 2022

Cascades Tissue Group Sees Continued Growth in Private Labels, Tissue360º Fall/Winter 2022

iT’s Tissue 2022—The Review, Tissue360º Fall/Winter 2022

iT’s Tissue 2022—The Review, Tissue360º Fall/Winter 2022

Aiming Toward Energy-efficient and Economical Tissue Production, Tissue360º Fall/Winter 2022

Thai Tiger: BJC Cellox Aiming to be No.1 in Tissue, Tissue360º Fall/Winter 2022