THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Mingfang Jin

,

Feng He

,

Junlin Xie

,

Shuxia Mei

NUMERICAL SIMULATION ON NOX REDUCTION IN THE FLOAT GLASS FURNACE WITH GRADIENT OXYGEN-ENHANCED COMBUSTION

ABSTRACT
To reveal the influence of using gradient oxygen-enhanced combustion on the gas-flow, combustion status, heat transfer and NOx emission in glass furnace, numerical simulation on the flame space of an actual float glass furnace with air combustion was conducted. The streamline of combustion-supporting gas and flue gas was displayed, the temperature distribution and heat transfer performance in the flame space were analyzed, and the mechanism of NOx emission reduction by gradient oxygen-enhanced combustion was explored. The comparative study between air combustion and gradient oxygen-enhanced combustion showed that there is not much difference in the streamline and temperature distribution in flame space, which ensures the stability of working state in furnace. Compared with air combustion, the temperature of the batch zone was increased by using gradient oxygen-enhanced combustion, and the high temperature combustion zone was closer to the glass surface, which increases the radiant heat flux to the glass surface. In addition, the NOx emission concentration in flue gas at the outlets was reduced by 17.1%. The results obtained in this study not only provide important theoretical guidance for gradient oxygen-enhanced combustion in glass furnace, but also lay a foundation for further research about advanced combustion mode to save energy and reduce emissions.
KEYWORDS
float glass furnace, flame space, gradient oxygen-enhanced combustion, numerical simulation, NOx emission reduction
PAPER SUBMITTED: 2024-10-01
PAPER REVISED: 2024-11-21
PAPER ACCEPTED: 2024-11-30
PUBLISHED ONLINE: 2025-01-09
DOI REFERENCE: https://doi.org/10.2298/TSCI241001280J
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 4, PAGES [2627 - 2640]
REFERENCES
  1. Wang, J., Application and Comparison of SCR, SNCR and SNCR/SCR Flue Gas Denitration Technology (in Chinese), Electric Power Technology and Environmental Protection, 34 (2018), 5, pp. 35-36
  2. Beerkens, R., et al., Reduction of NOx Emissions in Regenerative Fossil Fuel Fired Glass Furnaces: a Review of Literature and Experimental Studies, Glass Technology, 49 (2008), 6, pp. 279-288
  3. Zhao, E., et al., A Section Gradient Oxygen-increasing Combustion Assistance Technology Of Float Glass Furnace for Reducing Emission of NOx (in Chinese), Glass, (2013), 5, pp. 12-15
  4. Pedel, J., et al., Oxygen Enhanced NOx Reduction (OENR) Technology for Glass Furnaces, Proceedings, 75th Conference on Glass Problem, Greater Columbus Convention Center, Columbus, O., USA, 2014, pp. 3-6
  5. Huang, Z., Mu, Z., The Improve Design for Glass Furnace Melter End and Working End of Gradient Increase Combustion Oxygen (in Chinese), Glass, (2019), 4, pp. 21-26
  6. Huang, Z., Mu, Z., The Improve Design for Glass Furnace Regenerator of Gradient Increase Combustion Oxygen (in Chinese), Glass, (2018), 9, pp. 17-21
  7. Alan Pools, W., Mathematical Modeling of Glass Melting Systems, Am Ceram Soc Bul, 83 (2004), 1, pp. 25-27
  8. Dankert, T. K., Tuson, G. B., Demonstration on an Ultra-Low-NOx Oxygen-fuel Glass Melting System, Ceram Eng Sci Proc, 17 (1996), 2, pp. 47-54
  9. Boineau, P., et al., Numerical Simulation of a Batch Metallurgy Furnace Equipped with Flameless Oxidation Regenerative Burners, Revue De Metallurgie, 104 (2007), 3, pp. 142-148
  10. Manoj, K. C., et al., Mathematical Modeling of Flow and Heat Transfer Phenomena in Glass Melting, Delivery, and Forming Processes, International Journal of Applied Glass Science, 1 (2010), 2, pp. 45-48
  11. Karimi, H. J., Saidi, M. H., Heat Transfer and Energy Analysis of a Pusher Type Reheating Furnace Using Oxygen Enhanced Air for Combustion, Iron and Steel Research International, 17 (2010), 4, pp. 12-17
  12. Mette, B., et al., Numerical Simulations of Staged Biomass Grate Fired Combustion with an Emphasis on NOx Emissions, Energy Procedia, 75 (2015), Aug., pp. 156-161
  13. Hou, X., et al., CFD Simulation of Combustion in Gas Turbine Engine, Proceedings, 5th International Conference on Frontiers of Manufacturing Science and Measuring Technology, Taiyuan, China, 2017, Vol. 6, pp. 890-896
  14. Dekterev, A. A., et al., Numerical Simulation of Liquid Hydrocarbon Fuel Burning in a Direct-flow Evaporation Burner in a Jet of Superheated Steam, Proceedings, 35th Siberian Thermophysical Seminar (STS), Novosibirsk, Russia, 2019, pp. 8
  15. Fordoei, E. E., et al., Numerical Study on the Heat Transfer Characteristics, Flame Structure, and Pollutants Emission in the MILD Methane-air, Oxygen-enriched and Oxy-methane Combustion, Energy, 218 (2021), 119524
  16. Mei, S., et al., Numerical Simulation of the Complex Thermal Processes in a Vortexing Precalciner, Applied Thermal Engineering, 125 (2017), Oct., pp. 652-661
  17. Mei, Z., et al., Influences of Reactant Injection Velocities on Moderate or Intense Low-Oxygen Dilution Coal Combustion, Energy & Fuels, 28 (2014), 1, pp. 369-384
  18. Weber, R., et al., On the (MILD) Combustion of Gaseous, Liquid, and Solid Fuels in High Temperature Preheated Air, Proceedings of the Combustion Institute, 30 (2005), 2, pp. 2623-2629
  19. Diaz-Ibarra, O., et al., Design of a Day Tank Glass Furnace Using a Transient Model and Steady-State Computation Fluid Dynamics, Applied Thermal Engineering, 52 (2013), 2, pp. 555-565
  20. Szymczyk, J., et al., Improvement of Energy Efficiency of Natural Gas Combustion by Applying a Homogeneous Combustion, E3S Web of Conferences, 17 (2017), May, pp. 93-96
  21. Banerjee, A., et al., Simulation of Combustion Space Heat Transfer of Glass Melting Furnace, Heat Transfer-Asian Research, 46 (2016), 6, pp. 569-584
  22. Abbassi, A., Khoshmanesh, K., Numerical Simulation and Experimental Analysis of an Industrial Glass Melting Furnace, Applied Thermal Engineering, 28 (2008), 5-6, pp. 450-459
  23. Simcik, M., Ruzicka, M. C., CFD Model for Pneumatic Mixing with Bubble Chains: Application to Glass Melts, Chemical Engineering Science, 127 (2017), May, pp. 344-361
PDF VERSION [DOWNLOAD]
Numerical simulation on NOx reduction in the float glass furnace with gradient oxygen-enhanced combustion

2025 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