Combustion using high temperature and low oxygen content air is a new technique with many advantages such as larger energy saving and lower NOx pollution. In this new technique, air is preheated over the self-ignition point of the fuel and the volumetric oxygen content in combustion chamber is less than 15%. It can be implemented by utilizing high efficient regenerative heat exchanger and recycling exhaust gas in furnace. In this research, experiments were conducted to investigate the flame characteristics using nitrogen as diluting gas and adopting electric heating element to preheat air. The results show that on the condition of high temperature and low oxygen content air, the volume, the brightness, and the color of flame change significantly, the maximum temperature of flame decreases obviously, and the temperature distribution in furnace becomes uniform. A technique renovation is proposed for traditional radiant heating tube based on this new combustion scheme, and the advantages obtained by this renovation are evaluated. It is found that higher heat efficiency, uniform surface temperature, longer life expectancy, and lower NOx emission and combustion noise can be achieved. The calculation results show that the heat efficiency of radiant-tube can reach 85.3% and save energy up to 21.55% after the renovation. At the same time, the non-uniform coefficient of surface temperature is decreased to 0.02 or less. A small-scale test facility is being built to validate these results.
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ASME 2003 Heat Transfer Summer Conference
July 21–23, 2003
Las Vegas, Nevada, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-3694-0
PROCEEDINGS PAPER
Combustion Using High Temperature and Low Oxygen Content Air and Technique Renovation of Traditional Gas-Fired Radiant Heating Tube
Hao-Yi Peng,
Hao-Yi Peng
Central South University, Changsha, Hunan, China
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Jie-Min Zhou,
Jie-Min Zhou
Central South University, Changsha, Hunan, China
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Shao-Jian Jiang
Shao-Jian Jiang
Central South University, Changsha, Hunan, China
Search for other works by this author on:
Hao-Yi Peng
Central South University, Changsha, Hunan, China
Jie-Min Zhou
Central South University, Changsha, Hunan, China
Shao-Jian Jiang
Central South University, Changsha, Hunan, China
Paper No:
HT2003-47509, pp. 169-175; 7 pages
Published Online:
December 17, 2008
Citation
Peng, H, Zhou, J, & Jiang, S. "Combustion Using High Temperature and Low Oxygen Content Air and Technique Renovation of Traditional Gas-Fired Radiant Heating Tube." Proceedings of the ASME 2003 Heat Transfer Summer Conference. Heat Transfer: Volume 2. Las Vegas, Nevada, USA. July 21–23, 2003. pp. 169-175. ASME. https://doi.org/10.1115/HT2003-47509
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