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

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

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

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.
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
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
CountryCroatia
CityDubrovnik
Period04/10/201708/10/2017
Internet address

Fingerprint

Wood wastes
Flue gases
Boilers
Computational fluid dynamics
Air
Momentum
Heat transfer
Gases
Temperature

Keywords

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

Cite this

Rajh, B., Yin, C., Samec, N., Hriberšek, M., Kokalj, F., & Zadravec, M. (2017). Advanced air/flue gas staging based on CFD modelling for enhanced combustion and burnout in a waste-wood fired boiler. In Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems SDEWES Centre.
Rajh, Boštjan ; Yin, Chungen ; Samec, Niko ; Hriberšek, Matjaž ; Kokalj, Filip ; Zadravec, Matej. / Advanced air/flue gas staging based on CFD modelling for enhanced combustion and burnout in a waste-wood fired boiler. Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems. SDEWES Centre, 2017.
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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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Rajh, B, Yin, C, Samec, N, Hriberšek, M, Kokalj, F & Zadravec, M 2017, Advanced air/flue gas staging based on CFD modelling for enhanced combustion and burnout in a waste-wood fired boiler. in Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems. SDEWES Centre, 12th Conference on Sustainable Development of Energy, Water and Environment Systems , Dubrovnik, Croatia, 04/10/2017.

Advanced air/flue gas staging based on CFD modelling for enhanced combustion and burnout in a waste-wood fired boiler. / Rajh, Boštjan; Yin, Chungen; Samec, Niko; Hriberšek, Matjaž; Kokalj, Filip; Zadravec, Matej.

Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems. SDEWES Centre, 2017.

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

TY - GEN

T1 - Advanced air/flue gas staging based on CFD modelling for enhanced combustion and burnout in a waste-wood fired boiler

AU - Rajh, Boštjan

AU - Yin, Chungen

AU - Samec, Niko

AU - Hriberšek, Matjaž

AU - Kokalj, Filip

AU - Zadravec, Matej

PY - 2017/10

Y1 - 2017/10

N2 - 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.

AB - 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.

KW - Waste-fired grate boiler

KW - Computational Fluid Dynamics (CFD)

KW - Air/flue gas staging

KW - Boiler performance

KW - Flow uniformity

KW - Mixing process

M3 - Article in proceeding

BT - Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems

PB - SDEWES Centre

ER -

Rajh B, Yin C, Samec N, Hriberšek M, Kokalj F, Zadravec M. Advanced air/flue gas staging based on CFD modelling for enhanced combustion and burnout in a waste-wood fired boiler. In Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems. SDEWES Centre. 2017