International Scientific Journal

Thermal Science - Online First

online first only

Numerical simulation on the emission of NOx from the combustion of natural gas in the sidewall burner

The NOx produced from industrial facilities is a serious environmental problem in China. In this work, the NOx emission from the combustion of natural gas in the sidewall burner was investigated by using computational fluid dynamics method. To achieve the low-NOx emission, the sidewall burner structure was optimized involving the width of the primary premixed gas outlet, the secondary fuel gas nozzles number and angular spacing. The mixing rate of fuel gas and air could be improved by increasing the width of primary premixed gas outlet, and the lowest NOx emission of 32.8 ppm was achieved at the width of 8 mm. The NOx emission was remarkably reduced with the increasing of nozzles number, where 28.33 ppm of NOx emission and 357.35 ppm of CO were obtained at 4 nozzles. The combustion performance and NOx emission was improved as well as NOx emission was reduced at the angular spacing of 55°, compared to that of 30°, 35°, 40°, 45°, 50° and 60°.
PAPER REVISED: 2020-12-01
PAPER ACCEPTED: 2020-12-03
  1. Wang, Y.Q., et al., Experimental investigation of the characteristics of NOx emissions with multiple deep air-staged combustion of lean coal, Fuel, 280 (2020), 118416
  2. Abbasi, T., et al., Acid rain: past, present, and future, International Journal of Environmental Engineering, 5 (2013), 3, pp. 229-272
  3. Su, Y., et al., An Overview of Low NOx Gas Combustion Technology and Burner Design, Industrial Boiler, 4 (2016), pp. 17-25
  4. Houshfar, E., et al., Effect of Excess Air Ratio and Temperature on NOx Emission from Grate Combustion of Biomass in the Staged Air Combustion Scenario, Energy & Fuels, 25 (2011), 10, pp. 4643-4654
  5. Li, Z., et al., Combustion and NOx emission characteristics of a retrofitted down-fired 660 MWe utility boiler at different loads, Applied Energy, 88 (2011), 7, pp. 2400-2406
  6. Changyeop, L., et al., An Experimental Study on Industrial Boiler Burners Applied Low NOx Combustion Technologies, Journal of Clean Energy Technologies, (2016), pp. 430-434
  7. Gupta, A.K., Lilley, D.G., Syred, N., Swirl Flows, Abacus Press, London, 1984
  8. Nhan, H.K., et al., CFD investigation of NOx reduction with a flue-gas internal recirculation burner in a mid-sized boiler, Journal of Mechanical ence and Technology, 33 (2019), 6, pp. 2967-2978
  9. Chen, S., et al., CFD investigation on Low-NOx strategy of folded flame pattern based on fuel-staging natural gas burner, Applied Thermal Engineering, 112 (2017), pp. 1487-1496
  10. Iyogun, C.O., et al., Experimental investigation of the effect of fuel nozzle geometry on the stability of a swirling non-premixed methane flame, Fuel, 90 (2011), 4, pp. 1416-1423
  11. Fan, C., et al., Experimental study of sidewall effect on flame characteristics of heptane pool fires with different aspect ratios and orientations in a channel, Proceedings of the Combustion Institute, 36 (2017), 2, pp. 3121-3129
  12. Eric, A., et al., Experimental and numerical study on combustion of baled biomass in cigar burners and effects of flue gas recirculation, Thermal Science, 20 (2016), Suppl. 1, pp. 151-165
  13. Guo, C., et al., Effect of fuel injection characteristics on the performance of a free-piston diesel engine linear generator: CFD simulation and experimental results, Energy Conversion and Management, 160 (2018), pp. 302-312
  14. 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
  15. Goh, E., et al., Modeling of Minimum NOx in Staged-Combustion Architectures at Elevated Temperatures, Asme Turbo Expo: Turbomachinery Technical Conference & Exposition, 2017
  16. Álvarez, L., et al., Oxy-coal combustion in an entrained flow reactor: Application of specific char and volatile combustion and radiation models for oxy-firing conditions, Energy, 62 (2013), pp. 255-268
  17. Soete, G.G.D. Overall reaction rates of NO and N2 formation from fuel nitrogen, Symposium on Combustion, 15 (1975), 1, pp. 1093-1102
  18. Kim, J.P., et al.,2008. Comparison of different global reaction mechanisms for mild combustion of natural gas, Combustion Science and Technology, 180 (2008), 4, pp. 565-592.
  19. Novosselov, I.V., et al., Development and Application of an Eight-Step Global Mechanism for CFD and CRN Simulations of Lean-Premixed Combustors, Journal of Engineering for Gas Turbines & Power, 130 (2008), 2, pp. 769-779
  20. Taniguchi, M., et al., Comparison of staged combustion properties between bituminous coals and a low-rank coal; Fiber-shaped crystallized carbon formation, NOx emission and coal burnout properties at very high temperature, Combustion & Flame, 160 (2013), 10, pp. 2221-2230
  21. Shih, T.H., et al., A new eddy k-ε viscosity model for high Reynolds number turbulent flows, Computer & Fluids, 24 (1995), 3, pp. 227-238
  22. Jovanovic, R., et al., Experimental and numerical investigation of flame characteristics during swirl burner operation under conventional and oxy-fuel conditions, Thermal Science, 21 (2016), pp. 325-325
  23. Farokhi, M., Birouk M., A new EDC approach for modeling turbulence/chemistry interaction of the gas-phase of biomass combustion, Fuel, 220 (2018), pp. 420-436
  24. Lupant, D., Lybaert, P., Assessment of the EDC combustion model in MILD conditions with in-furnace experimental data, Applied Thermal Engineering, 75 (2015), pp. 93-102
  25. García, A.M., et al., Combustion model evaluation in a CFD simulation of a radiant-tube burner, Fuel, 276 (2020), 118013
  26. Vaid, H.S., et al., A run time combustion zoning technique towards the EDC approach in large-scale CFD simulations, International Journal of Numerical Methods for Heat & Fluid Flow, 24 (2013), 1, pp. 21-35
  27. Habibi, A., et al., Multiscale modeling of turbulent combustion and NOx emission in steam crackers, AIChE Journal, 53 (2010), 9, pp. 2384-2398
  28. Bulysova, L.A., et al., Parametric Computational Studies of NOx Emission Reduction in Staged Combustion of Ideal Fuel-Air Mixtures, Power Technology and Engineering 52 (2018), 2, pp. 1-7
  29. Terasaki, T., et al., The effects of fuel-air mixing on NOx formation in non-premixed swirl burners, Symposium on Combustion, 26 (1996), 2, pp. 2733-2739
  30. Cuoci, A., et al., The ignition, combustion and flame structure of carbon monoxide/hydrogen mixtures. Note 2: Fluid dynamics and kinetic aspects of syngas combustion, International Journal of Hydrogen Energy, 32 (2007), 15, pp. 3486-3500
  31. Yang, X., et al., Numerical investigation on the mixing process in a steam ejector with different nozzle structures, International Journal of Thermal Sciences, 56 (2013) , pp. 95-106
  32. Fu, Z., et al., Generation characteristics of thermal NOx in a double-swirler annular combustor under various inlet conditions, Energy, 200 (2020), 117487
  33. Schluckner, C., et al., Fast and accurate CFD-model for NOx emission prediction during oxy-fuel combustion of natural gas using detailed chemical kinetics, Fuel, 264 (2020), 15, 116841
  34. Chen, H., et al., Combustion and NOx Emission Behavior of Chinese Coals, Chinese Journal of Chemical Engineering, 10 (2002), 3, pp. 333-338
  35. Yan, Y., et al., Influence of oxygen concentration on combustion characteristics of inferior coal and sludge mixture, Journal of Fuel Chemistry and Technology, 41 (2013) , pp. 430-435