THERMAL SCIENCE

International Scientific Journal

NUMERICAL STUDY ON CHARACTERISTICS OF COMBUSTION AND POLLUTANT FORMATION IN A REHEATING FURNACE

ABSTRACT
Energy consumption of fuel-fired industrial furnace accounts for about 23% of the national total energy consumption every year in China. Meanwhile, the reduction of combustion-generated pollutants in furnace has become very important due to the stringent environment laws and policy introduced in the recent years. It is therefore a great challenge for the researchers to simultaneously enhance the fuel efficiency of the furnace while controlling the pollution emission. In this study, a transient 3-D mathematical combustion model coupled with heat transfer and pollution formation model of a walking-beam-type reheating furnace has been developed to simulate the essential combustion, and pollution distribution in the furnace. Based on this model, considering nitrogen oxides formation mechanism, sensitivity study has been carried out to investigate the influence of fuel flow rate, air-fuel ratio on the resultant concentration of nitrogen oxides in the flue gas. The results of present study provide valuable information for improving the thermal efficiency and pollutant control of reheating furnace.
KEYWORDS
PAPER SUBMITTED: 2018-01-18
PAPER REVISED: 2018-05-15
PAPER ACCEPTED: 2018-05-25
PUBLISHED ONLINE: 2018-09-29
DOI REFERENCE: https://doi.org/10.2298/TSCI180118277Q
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE 5, PAGES [2103 - 2112]
REFERENCES
  1. Yao, W. L., Xing, T., Analysis of Energy Situation and Corresponding Strategy of China, Energy Research and Information, 22 (2006), 4, pp. 187-193
  2. Li, Z. Y., et al., Computer Simulation of the Slab Reheating Furnace, Canadian Metallurgical Quarterly, 27 (1988), 3, pp. 187-196
  3. Kim, J. G., Huh, K. Y., Three Dimensional Analysis of the Walking Beam Type Reheating Furnace in Hot Strip Mills, Numerical Heat Transfer, Part A, 38 (2000), 7, pp. 589-609
  4. Kim, J. G., Huh, K. Y., Prediction of Transient Slab Temperature Distribution in the Reheating Furnace of a Walking-beam Type for Rolling of Steel Slabs, ISIJ International, 40 (2000), 11, pp. 1115-1123
  5. Kim, M. Y., A Heat Transfer Model for the Analysis of Transient Heating of the Slab in a Direct-fired Walking Beam Type Reheating Furnace, International Journal of Heat and Mass Transfer, 50 (2007), 19-20, pp. 3740-3748
  6. Han, S. H., et al., Transient Radiative Heating Characteristics of Slabs in a Walking Beam Type Reheating Furnace, International Journal of Heat and Mass Transfer, 52 (2009), 3-4, pp. 1005-1011
  7. Han, S. H., et al., A Numerical Analysis of Slab Heating Characteristics in a Walking Beam Type Reheating Furnace, International Journal of Heat and Mass Transfer, 53 (2010), 19-20, pp. 3855-3861
  8. Han, S. H., et al., Efficiency Analysis of Radiative Slab Heating in a Walking-beam-type Reheating Furnace, Energy, 36 (2011), 2, pp. 1265-1272
  9. Han, S. H., Chang, D. J., Radiative Slab Heating Analysis for Various Fuel Gas Compositions in an Axial-fired Reheating Furnace, International Journal of Heat and Mass Transfer, 55 (2012), 15-16, pp. 4029-4036
  10. Zhang, C., et al., Numerical Modeling of the Thermal Performance of Regenerative Slab Reheat Furnaces, Numerical Heat Transfer, Part A, 66 (1997), 32, pp. 613-631
  11. Stockwell, N., et al., Numerical Simulations of Turbulent Non-premixed Combustion in a Regenerative Furnace, ISIJ International, 41 (2001), 10, pp. 1272-1281
  12. Maki, A. M., et al., Numerical Study of the Pusher-type Slab Reheating Furnace, Scandinavian Journal of Metallurgy, 31 (2002), 2, pp. 81-87
  13. Tang, Y., et al., The Modeling of the Gas Flow and its Influence on the Scale Accumulation in the Steel Slab Pusher-Type Reheating Furnace, ISIJ International, 43 (2003), 11, pp. 1333-1341
  14. Harish, J., Dutta, P., Heat Transfer Analysis of Pusher Type Reheat Furnace, Ironmaking Steelmaking, 32 (2005), 2, pp. 151-158
  15. Hsieh, C. T., et al., Numerical Modeling of a Walking-beam-type Slab Reheating Furnace, Numerical Heat Transfer, Part A, 53 (2008), 9, pp. 966-981
  16. Wang, J., et al., Analysis of Slab Heating Characteristics in a Reheating Furnace, Energy Conversion and Management, 149 (2017), Oct., pp. 928-936
  17. Ishii, T., et al., Effects of NO Models on the Prediction of NO Formation in a Regenerative Furnace, Journal Energy Resources Technology, 122 (2000), 4, pp. 224-228
  18. Khalilarya, S., Lotfiani, A., Determination of Flow Pattern and its Effect on NOx Emission in a Tangentially Fired Single Chamber Square Furnace, Thermal Science, 14 (2010), 2, pp. 493-503
  19. DeSoete, G. G., Overall Reaction Rates of NO and Formation from Fuel Nitrogen, in: 15th Symp. on Combustion, The Combustion Institute, 1975, pp. 1093-1102

© 2018 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, 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