Numerical study on characteristics of combustion and pollutant formation in a reheating furnace

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.

[1]  B. Sundén,et al.  Analysis of slab heating characteristics in a reheating furnace , 2017 .

[2]  Daejun Chang,et al.  Radiative slab heating analysis for various fuel gas compositions in an axial-fired reheating furnace , 2012 .

[3]  Determination of flow pattern and its effect on NOx emission in a tangentially fired single chamber square furnace , 2010 .

[4]  Chao Zhang,et al.  Effects of NO Models on the Prediction of NO Formation in a Regenerative Furnace , 2000 .

[5]  Daejun Chang,et al.  A numerical analysis of slab heating characteristics in a walking beam type reheating furnace , 2010 .

[6]  Man Young Kim,et al.  A heat transfer model for the analysis of transient heating of the slab in a direct-fired walking beam type reheating furnace , 2007 .

[7]  Seung Wook Baek,et al.  Transient radiative heating characteristics of slabs in a walking beam type reheating furnace , 2009 .

[8]  Chao Zhang,et al.  NUMERICAL MODELING OF THE THERMAL PERFORMANCE OF REGENERATIVE SLAB REHEAT FURNACES , 1997 .

[9]  Mei-Jiau Huang,et al.  Numerical Modeling of a Walking-Beam-Type Slab Reheating Furnace , 2008 .

[10]  Daejun Chang,et al.  Efficiency analysis of radiative slab heating in a walking-beam-type reheating furnace , 2011 .

[11]  Numerical simulations of turbulent non-premixed combustion in a regenerative furnace. , 1999 .

[12]  P. V. Barr,et al.  Computer Simulation of the Slab Reheating Furnace , 1988 .

[13]  M. Luomala,et al.  Numerical study of the pusher-type slab reheating furnace , 2002 .

[14]  Kang Y. Huh,et al.  Prediction of Transient Slab Temperature Distribution in the Re-heating Furnace of a Walking-beam Type for Rolling of Steel Slabs , 2000 .

[15]  G. Soete.  Overall reaction rates of NO and N2 formation from fuel nitrogen , 1975 .

[16]  P. Dutta,et al.  Heat transfer analysis of pusher type reheat furnace , 2005 .