Advanced air/flue gas staging based on CFD modelling for enhanced combustion and burnout in a waste-wood fired boiler

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

  • Boštjan Rajh
  • Chungen Yin
  • Niko Samec
  • Matjaž Hriberšek
  • Filip Kokalj
  • Matej Zadravec

Abstract

The paper presents the impacts of the jet momentum, position and orientation of air and Recycled Flue Gas (RFG) streams on the performance of a grate-fired boiler burning waste wood via a comprehensive CFD-based parametric study. It is found that the air and RFG jets can be optimized to enhance mixing and improve combustion in the boiler. For instance, the optimized air and RFG jets can extend the residence time of the gas and entrained fine particles in the hot zones effectively, make the temperature and velocity profiles more uniform, and enhance heat transfer. The findings of this study can serve as useful guidelines for innovative design and optimization of the secondary air and RFG for this type of grate boilers.
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Details

The paper presents the impacts of the jet momentum, position and orientation of air and Recycled Flue Gas (RFG) streams on the performance of a grate-fired boiler burning waste wood via a comprehensive CFD-based parametric study. It is found that the air and RFG jets can be optimized to enhance mixing and improve combustion in the boiler. For instance, the optimized air and RFG jets can extend the residence time of the gas and entrained fine particles in the hot zones effectively, make the temperature and velocity profiles more uniform, and enhance heat transfer. The findings of this study can serve as useful guidelines for innovative design and optimization of the secondary air and RFG for this type of grate boilers.
Original languageEnglish
Title of host publicationProceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems
Number of pages14
PublisherSDEWES Centre
Publication dateOct 2017
Publication statusPublished - Oct 2017
Publication categoryResearch
Peer-reviewedYes
Event12th Conference on Sustainable Development of Energy, Water and Environment Systems - Dubrovnik, Croatia
Duration: 4 Oct 20178 Oct 2017
http://www.dubrovnik2017.sdewes.org/

Conference

Conference12th Conference on Sustainable Development of Energy, Water and Environment Systems
LandCroatia
ByDubrovnik
Periode04/10/201708/10/2017
Internetadresse

    Research areas

  • Waste-fired grate boiler, Computational Fluid Dynamics (CFD), Air/flue gas staging, Boiler performance, Flow uniformity, Mixing process

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