Investigation of gas-solid flow characteristics in a novel internal fluidized bed combustor by experiment and CPFD simulation

Ding, Hanfeng; Ouyang, Zhen; Su, Kun; Zhang, Jinyang

doi:10.1016/j.apt.2023.103962

Cited by 7 publications

(1 citation statement)

References 56 publications

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“…Compared with traditional computational fluid dynamics (CFD), the CPFD method could model particles with diverse particle size distributions as well as the background of a massive number of particles in the engineering industry, which provides an efficient technological method for simulating CFB boilers employed in industrial settings [23]. Recently, some researchers [24][25][26][27][28] have applied the CPFD method to conduct various numerical simulations. Their main focus was on the simulation of the reaction process in coal gasification, combustion process, and other related concerns.…”

Section: Introductionmentioning

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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