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

Yang Wang, Xiangyu Chen, Liping Xu, Mingwei Ma, Xiaole Huang, Feng Han, Yong Zhou, Chen Du, Yaodong Da () and Lei Deng
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Yang Wang: Engineering Technology Research Institute (Supervision Company), PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Xiangyu Chen: Engineering Technology Research Institute (Supervision Company), PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Liping Xu: Engineering Technology Research Institute (Supervision Company), PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Mingwei Ma: Engineering Technology Research Institute (Supervision Company), PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Xiaole Huang: State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Feng Han: Engineering Technology Research Institute (Supervision Company), PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Yong Zhou: Engineering Technology Research Institute (Supervision Company), PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Chen Du: Engineering Technology Research Institute (Supervision Company), PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Yaodong Da: State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Lei Deng: State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Energies, 2023, vol. 17, issue 1, 1-17

Abstract: 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 O 2 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 CO 2 mole fraction reduces from 0.1357 to 0.1267. The mole fraction of NO x and SO 2 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 NO x mole fraction initially grows quickly and then declines gradually, ranging from 4.1173 × 10 ?5 to 4.2556 × 10 ?5 . The mole fraction of SO 2 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 NO x at the furnace outlet are between 3.9096 × 10 ?5 and 5.1537 × 10 ?5 , while those for SO 2 are between 2.5978 × 10 ?4 and 2.5278 × 10 ?4 .

Keywords: tri-combustion; CPFD; CFB boiler; combustion characteristics; NO x emission (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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