Computational particle fluid dynamics modeling and design of in-situ catalytic deNOx in an industrial CFB boiler

Chang, Jian; Ma, Xinrui; Wang, Xin; Li, Xiaohang

doi:10.1016/j.ces.2023.118502

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…During simulation calculations, the solid and the gas phases are coupled. The main governing equations are listed in Table 1 [30][31][32][33].…”

Section: Governing Equationsmentioning

confidence: 99%

Computational Particle Fluid Dynamics Simulation on Combustion Characteristics of Blended Fuels of Coal, Biomass, and Oil Sludge in a 130 t h−1 Circulating Fluidized Bed Boiler

Wang,

Chen,

et al. 2023

Energies

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In this study, the co-combustion of coal and biomass, and the tri-combustion of coal, biomass, and oil sludge in a 130 t h−1 circulating fluidized bed (CFB) boiler are investigated via the computational particle fluid dynamics (CPFD) approach. Furthermore, the effect of biomass feeding position is also comprehensively evaluated. The results show that for the co-combustion of coal and biomass, the O2 mole fraction at the furnace outlet rises from 0.0541 to 0.0640 as the biomass blending ratio enhances from 40% to 100%, while the CO2 mole fraction reduces from 0.1357 to 0.1267. The mole fraction of NOx and SO2 at the furnace outlet decreases from 4.5867 × 10−5 to 3.9096 × 10−5 and 2.8253 × 10−4 to 4.6635 × 10−5, respectively. For the tri-combustion of three fuels, the average NOx mole fraction initially grows quickly and then declines gradually, ranging from 4.1173 × 10−5 to 4.2556 × 10−5. The mole fraction of SO2 at the furnace outlet increases from 3.5176 × 10−4 to 4.7043 × 10−4 when the ratio of oil sludge rises from 10% to 20%. The uniformity of temperature and gas components distribution is “new inlet > secondary air inlet > feed inlet”. As for the three inlet positions, the mole fractions of NOx at the furnace outlet are between 3.9096 × 10−5 and 5.1537 × 10−5, while those for SO2 are between 2.5978 × 10−4 and 2.5278 × 10−4.

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“…During simulation calculations, the solid and the gas phases are coupled. The main governing equations are listed in Table 1 [30][31][32][33].…”

Section: Governing Equationsmentioning

confidence: 99%

Computational Particle Fluid Dynamics Simulation on Combustion Characteristics of Blended Fuels of Coal, Biomass, and Oil Sludge in a 130 t h−1 Circulating Fluidized Bed Boiler

Wang,

Chen,

et al. 2023

Energies

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“…One type of boiler used in the plant is a Circulating Fluidized Bed (CFB) boiler. CFB boiler is one of the most mature clean coal combustion technologies [2]. The CFB boiler operation has excellent fuel flexibility, high combustion efficiency, low nitric oxide content, and high sulfur capture efficiency [3].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Coal Mixture Composition Effects on Combustion and Gas Emissions in CFB Boiler

Santoso,

Fauzun

2024

J. of App. Sci. & Adv. Eng.

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The combustion system in the CFB boiler had a high complexity, in order to identify and understand the combustion process that occurs in the CFB boiler, CFD analysis was applied. This study was conducted to analyze the combustion and gas emissions produced in a CFB boiler with several variations of coal mixture. Coal particles injected into the furnace were modeled with DPM, specifically the Euler-Lagrange approach. The coal used came from two coal mining industries and mixed with the percentages of 20% : 80%, 30% : 70% and 40% : 60%. The amounts and conditions of combustion air and coal had been determined. The simulation process in the CFB boiler was carried out at a maximum load (110 MWe) without involving bed material. The results showed that the energy and combustion temperature produced in the mixture of 20% : 80% reached the highest value, the mixture of 40% : 60% produced the highest concentration of H2O and produced the lowest concentrations of CO2, O2, NO and SO2. On the other hand, the distribution of pressure and gas velocity had relatively the same value in each mixture. This could be caused by the characteristics of coal mixture, the amount of air and coal injected, and the absence of bed material.

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Comparison of Fully 3-D, Simplified 3-D and 2-D Numerical Simulations on a Circulating Fluidized Bed Boiler

Li,

Cheng,

et al. 2023

J. Therm. Sci.

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Computational particle fluid dynamics modeling and design of in-situ catalytic deNOx in an industrial CFB boiler

Cited by 8 publications

References 34 publications

Computational Particle Fluid Dynamics Simulation on Combustion Characteristics of Blended Fuels of Coal, Biomass, and Oil Sludge in a 130 t h−1 Circulating Fluidized Bed Boiler

Computational Particle Fluid Dynamics Simulation on Combustion Characteristics of Blended Fuels of Coal, Biomass, and Oil Sludge in a 130 t h−1 Circulating Fluidized Bed Boiler

Numerical Analysis of the Coal Mixture Composition Effects on Combustion and Gas Emissions in CFB Boiler

Comparison of Fully 3-D, Simplified 3-D and 2-D Numerical Simulations on a Circulating Fluidized Bed Boiler

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