Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Event Type
Collections
Journal articles
Magazine articles
Kraft recovery boiler operation with splash plate and/or beer can nozzles — a case study, TAPPI Journal October 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.
Energy Management Optimizations Using Multi-Variable Fuzzy Logic Control, 1997 Engineering Conference Proceedings
Energy Management Optimizations Using Multi-Variable Fuzzy Logic Control, 1997 Engineering Conference Proceedings
Energy Reduction at a Kraft Mill: Examining the Effects of Process Integration, Benchmarking, and Water Reduction, 2004 Engineering, Pulping, and PCE&I Conference
Energy Reduction at a Kraft Mill: Examining the Effects of Process Integration, Benchmarking, and Water Reduction, 2004 Engineering, Pulping, and PCE&I Conference
Analysis of the Potential of Photochemical and Electrochemical Techniques for Decolorization of Bleached Kraft Mill Effluent, 1992 Environmental Conference Proceedings
Analysis of the Potential of Photochemical and Electrochemical Techniques for Decolorization of Bleached Kraft Mill Effluent, 1992 Environmental Conference Proceedings
Courses
Events
Kraft Recovery Operations Course
One of TAPPI's highest rated, longest running events! You'll learn ways to improve pulp production efficiency, minimize operating costs and reduce environmental impact. This course is designed for pulp mill operations personnel.
Dissolving Pulp Manufacture with Continuous Cooking Technology Using Auto-Hydrolysis, 2012 TAPPI PEERS Conference
Dissolving Pulp Manufacture with Continuous Cooking Technology Using Auto-Hydrolysis, 2012 TAPPI PEERS Conference
Meeting the Reporting Challenges of the MACT Standards Defined Under 40CFR Part 63 Subpart S Throught the Use of an Event Logging/Reporting Software, 2002 Environmental Conference Proceedings
Meeting the Reporting Challenges of the MACT Standards Defined Under 40CFR Part 63 Subpart S Throught the Use of an Event Logging/Reporting Software, 2002 Environmental Conference Proceedings
Improved Ozone Bleaching by Impregntion of Chemical Pulps with an Acidified Mixture of 1,4 Dioxane and Water, 1996 International Pulp Bleaching Conference Proceedings
Improved Ozone Bleaching by Impregntion of Chemical Pulps with an Acidified Mixture of 1,4 Dioxane and Water, 1996 International Pulp Bleaching Conference Proceedings
Production of Neutral Saltcake in Sub-Atmospheric Chlorine Dioxide Plants, 2010 TAPPI PEERS Conference
Production of Neutral Saltcake in Sub-Atmospheric Chlorine Dioxide Plants, 2010 TAPPI PEERS Conference
Dynamic Modeling of Hydrogen Peroxide Decomposition in Pressurized Peroxide Bleaching, 1996 International Pulp Bleaching Conference Proceedings
Dynamic Modeling of Hydrogen Peroxide Decomposition in Pressurized Peroxide Bleaching, 1996 International Pulp Bleaching Conference Proceedings