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CFD Simulation of Biomass Combustion in an Industrial Circulating Fluidized Bed Furnace

Yang, Miao LU ; Zhong, Shenghui LU ; Xu, Shijie LU orcid ; Xu, Leilei LU ; Ottosson, Peter ; Fatehi, Hesameddin LU and Bai, Xue Song LU (2023) In Combustion Science and Technology 195(14). p.3310-3340
Abstract

In this study, a three-dimensional computational fluid dynamics (CFD) model is employed to investigate the hydrodynamic and combustion characteristics of biomass particles in an industrial-scale circulating fluidized bed (CFB) furnace. The CFD model considered here is based on the Eulerian-Lagrangian framework, the multi-phase particle-in-cell (MP-PIC) collision model, the coarse grain method (CGM), and a recently developed distribution kernel method (DKM). The challenge of simulating industrial-scale CFB furnaces using CFD lies in the large number of particles in the system. MP-PIC and CGM showed that local particle overloading could occur, causing the numerical simulation to diverge. The combination of MP-PIC with CGM and DKM was... (More)

In this study, a three-dimensional computational fluid dynamics (CFD) model is employed to investigate the hydrodynamic and combustion characteristics of biomass particles in an industrial-scale circulating fluidized bed (CFB) furnace. The CFD model considered here is based on the Eulerian-Lagrangian framework, the multi-phase particle-in-cell (MP-PIC) collision model, the coarse grain method (CGM), and a recently developed distribution kernel method (DKM). The challenge of simulating industrial-scale CFB furnaces using CFD lies in the large number of particles in the system. MP-PIC and CGM showed that local particle overloading could occur, causing the numerical simulation to diverge. The combination of MP-PIC with CGM and DKM was shown to overcome this problem. The CFD predictions werecompared with onsite temperature experiments in the furnace, and the predicted furnace temperature agreed fairly well with the measured data. Using the CFD results, the study analyzed the transient solids mixing and fluidization characteristics, as well as the thermochemical process in biomass combustion. The simulated individual particle provided insight into the physical and chemical processes of the granular flow in the dilute/dense regions of the CFB furnace. The simulated results revealed the CO and NOx emission processes in the furnace.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CFD simulation, combustion, formation and emission of pollutants, Hydrodynamic, industrial-scale CFB
in
Combustion Science and Technology
volume
195
issue
14
pages
31 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85171984619
ISSN
0010-2202
DOI
10.1080/00102202.2023.2260553
language
English
LU publication?
yes
id
cb4ee73f-c3ad-4dc8-9b1d-b4165443c02d
date added to LUP
2024-01-12 11:22:25
date last changed
2024-01-12 11:24:28
@article{cb4ee73f-c3ad-4dc8-9b1d-b4165443c02d,
  abstract     = {{<p>In this study, a three-dimensional computational fluid dynamics (CFD) model is employed to investigate the hydrodynamic and combustion characteristics of biomass particles in an industrial-scale circulating fluidized bed (CFB) furnace. The CFD model considered here is based on the Eulerian-Lagrangian framework, the multi-phase particle-in-cell (MP-PIC) collision model, the coarse grain method (CGM), and a recently developed distribution kernel method (DKM). The challenge of simulating industrial-scale CFB furnaces using CFD lies in the large number of particles in the system. MP-PIC and CGM showed that local particle overloading could occur, causing the numerical simulation to diverge. The combination of MP-PIC with CGM and DKM was shown to overcome this problem. The CFD predictions werecompared with onsite temperature experiments in the furnace, and the predicted furnace temperature agreed fairly well with the measured data. Using the CFD results, the study analyzed the transient solids mixing and fluidization characteristics, as well as the thermochemical process in biomass combustion. The simulated individual particle provided insight into the physical and chemical processes of the granular flow in the dilute/dense regions of the CFB furnace. The simulated results revealed the CO and NOx emission processes in the furnace.</p>}},
  author       = {{Yang, Miao and Zhong, Shenghui and Xu, Shijie and Xu, Leilei and Ottosson, Peter and Fatehi, Hesameddin and Bai, Xue Song}},
  issn         = {{0010-2202}},
  keywords     = {{CFD simulation; combustion; formation and emission of pollutants; Hydrodynamic; industrial-scale CFB}},
  language     = {{eng}},
  number       = {{14}},
  pages        = {{3310--3340}},
  publisher    = {{Taylor & Francis}},
  series       = {{Combustion Science and Technology}},
  title        = {{CFD Simulation of Biomass Combustion in an Industrial Circulating Fluidized Bed Furnace}},
  url          = {{http://dx.doi.org/10.1080/00102202.2023.2260553}},
  doi          = {{10.1080/00102202.2023.2260553}},
  volume       = {{195}},
  year         = {{2023}},
}