THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Jinyu Sun

,

Xiaojun Zhao

,

Dongfa Xue

COMPUTATIONAL FLUID DYNAMICS MODELING OF BIOMASS CO-FIRING IN A 300 MW PULVERIZED COAL FURNACE

ABSTRACT
Biomass energy is one of the most accessible and readily available carbon-neutral energy options as a RES. It is regarded as a viable alternative fuel for coal combustion, particularly for biomass co-firing with pulverized coal, with numerous applications. The CFD can provide reasonably accurate solutions to complex thermo-chemical-fluid interactions, which is useful for understanding the design or retrofit of boilers and can save time, money, and effort. In this study, a CFD simulation of a 300 MW pulverized coal boiler with biomass co-firing was performed to investigate the impact of biomass co-firing with coal, considering the biomass co-firing ratio, mixing effect, and feeding temperature. The results show that the flow field in the furnace does not change significantly under different bio-mass blending ratio. Biomass co-firing can reduce peak temperatures in the furnace and make the temperature distribution more uniform. The concentration of unburned carbon in the furnace decreases as the biomass blending ratio increases. Furthermore, biomass blending has a significant impact on nitrogen oxide reduction, with NOx emissions reduced by 20% and 28%, respectively, when the biomass blending ratio is 15% and 30%. The change of parameters inside the furnace caused by the reduction of biomass powder feeding temperature about 80 K is not significant. On the other hand, co-firing biomass with coal, reduces the risk of biomass spontaneous combustion while maintaining the furnace combustion stability and boiler combustion efficiency. The optimum ratio of biomass co-firing ration is deduced in this study is up to 20%.
KEYWORDS
CFD, numerical simulation, biomass, coupling mixing firing, combustion characteristic
PAPER SUBMITTED: 2022-02-17
PAPER REVISED: 2022-05-25
PAPER ACCEPTED: 2022-06-05
PUBLISHED ONLINE: 2022-10-29
DOI REFERENCE: https://doi.org/10.2298/TSCI2205179S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 5, PAGES [4179 - 4191]
REFERENCES
  1. Bhuiyan, A. A., Naser, J., CFD Modelling of Co-Firing of Biomass with Coal under Oxy-Fuel Combustion in a Large Scale Power plant, Fuel, 159 (2015), Nov., pp. 150-168
  2. Xingang, Z., et al., Focus on Situation and Policies for Biomass Power Generation in China, Renewable and Sustainable Energy Reviews 16 (2012), 6, pp. 3722-3729
  3. Black, S., et al., Effects of Firing Coal and Biomass under Oxy-Fuel Conditions in a Power Plant Boiler Using CFD Modelling, Fuel 113 (2013), Nov., pp. 780-786
  4. Zi, J., et al., Slagging Behavior and Mechanism of High-Sodium-Chlorine Coal Combustion in a Full-Scale Circulating Fluidized Bed Boiler, Journal of the Energy Institute, 93 (2020), 6, pp. 2264-2270
  5. Zhang, J., et al., Hot Corrosion Behaviors of TP347H and HR3C Stainless Steel with KCl Deposit in Oxy-Biomass Combustion, Journal of Environmental Management, 263 (2020), June, ID 110411
  6. Zi, J., et al., Effects of Temperature and Additives on Ash Transformation and Melting of High-Alkali-Chlorine Coal, Thermal Science, 24 (2020), 6A, pp. 3501-3510
  7. Bhuiyan, A. A., Naser, J., Computational Modelling of Co-Firing of Biomass with Coal under Oxy-Fuel Condition in a Small Scale Furnace, Fuel, 143 (2015), Mar., pp. 455-466
  8. Zheng, S., et al., Experimental Investigation of the NOx Formation and Control during the Self-Sustaining Incineration Process of N-Containing VOCs (dimethylformamide), Fuel, 315 (2022), May, ID 123149
  9. ***, IEA Bioenergy Task 32: Biomass Combustion and Co-Firing, Database of Biomass Co-Firing, www.ieabcc.nl/ (last visit May 2022)
  10. Alvarez, L., et al., Biomass Co-Firing under Oxy-Fuel Conditions: A Computational Fluid Dynamics Modelling Study and Experimental Validation, Fuel Processing Technology, 120 (2014), Apr., pp. 22-33
  11. Wang, X., et al., Experimental Study and Design of Biomass Co-Firing in a Full-Scale Coal-Fired Furnace with Storage Pulverizing System, Agronomy, 11 (2021), 4, ID 810
  12. Li, J., et al., Studies of Ignition Behaviour of Biomass Particles in a Down-Fire Reactor for Improving Co-Firing Performance, Energy & Fuels, 30 (2016), 7, pp. 5870-5877
  13. Momeni, M., et al., Experimental Study on Effects of Particle Shape and Operating Conditions on Com-bustion Characteristics of Single Biomass Particles, Energy & Fuels, 27 (2013), 1, pp. 507-514
  14. Magalhaes, D., et al., Comparison of Single Particle Combustion Behaviours of Raw and Torrefied Bio-mass with Turkish Lignites, Fuel, 241 (2019), Apr., pp. 1085-1094
  15. Tu, Y., et al., Effect of Biomass Co-Firing Position on Combustion and NOx Emission in a 300 MWe Coal-Fired Tangential Boiler, Asia-Pacific Journal of Chemical Engineering, 17 (2021), 1, ID e2743
  16. Tabet, F., Gokalp, I., Review on CFD Based Models for Co-Firing Coal and Biomass, Renewable and Sustainable Energy Reviews, 51 (2015), Nov., pp. 1101-1114
  17. Asotani, T., et al., Prediction of Ignition Behavior in a Tangentially Fired Pulverized Coal Boiler Using CFD, Fuel, 87 (2008), 4, pp. 482-490
  18. Zhou, H., et al., Numerical Simulation of the NOx Emissions in a 1000 MW Tangentially Fired Pulverized-Coal Boiler: Influence of the Multi-Group Arrangement of the Separated over Fire Air, Energy & Fuels, 25 (2011), 5, pp. 2004-2012
  19. Belosevic, S., et al., Three-Dimensional Modeling of Utility Boiler Pulverized Coal Tangentially Fired Furnace, International Journal of Heat and Mass Transfer, 49 (2006), 19, pp. 3371-3378
  20. Backreedy, R. I., et al., Co-Firing Pulverized Coal and Biomass: A Modeling Approach, Proceedings, of the Combustion Institute, 30 (2005), 2, pp. 2955-2964
  21. Johansson, R., et al., Account for Variations in the H2O to CO2 Molar Ratio when Modelling Gaseous Radiative Heat Transfer with the Weighted-Sum-Of-Grey-Gases Model, Combustion and Flame, 158 (2011), 5, pp. 893-901
  22. Ghenai, C., Janajreh, I., CFD Analysis of the Effects of Co-Firing Biomass with Coal, Energy Conversion and Management, 51 (2010), 8, pp. 1694-1701
  23. Gubba, S. R., et al., Numerical Modelling of the Co-Firing of Pulverized Coal and Straw in a 300 MWe Tangentially Fired Boiler, Fuel Processing Technology, 104 (2012), Dec., pp. 181-188
  24. Yin, C., et al., Use of Numerical Modeling in Design for Co-Firing Biomass in Wall-Fired Burners, Chem-ical Engineering Science, 59 (2004), 16, pp. 3281-3292
  25. Gera, D., et al., Effect of Large Aspect Ratio of Biomass Particles on Carbon Burnout in a Utility Boiler, Energy & Fuels, 16, (2002), 6, pp. 1523-1532
  26. Ma, L., et al., Modelling Methods for Co-Fired Pulverized Fuel Furnaces, Fuel, 88 (2009), 12, pp. 2448-2454
  27. Wang, X., et al., Numerical Study of Biomass Co-Firing Under Oxy-MILD Mode, Renewable Energy, 146 (2020), Feb., pp. 2566-2576
PDF VERSION [DOWNLOAD]
Computational fluid dynamics modeling of biomass co-firing in a 300 MW pulverized coal furnace

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence