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Experimental study of the fuel jet combustion in high temperature and low oxygen content exhaust gases

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  • Lille, Simon
  • Blasiak, Wlodzimierz
  • Jewartowski, Marcin

Abstract

The performance of high temperature air combustion (HiTAC) depends on the heat regenerator efficiency and on the way fuel is mixed with furnace gases. In this work, combustion of a single fuel jet of gasol (>95% of propane) was investigated experimentally. Experiments were carried out in steady-state conditions using a single jet flame furnace. The jet of fuel was co-axially injected into high temperature exhaust gases generated by means of a gas burner also fired with gasol. Thus, instead of highly preheated and oxygen depleted air, which was normally used by other researches for such studies, this work has used high temperature and low oxygen content exhaust gases as the oxidiser. A water-cooled fuel nozzle was used to control fuel inlet temperature. Influence of the oxygen content in the oxidiser, at temperatures of 860–890 °C, on the flame visibility and the reactants composition was investigated. The combustion of gasol in hot flue gases appeared to be very stable and complete even at very low oxygen concentration. The oxygen concentration in the oxidiser was found to have a substantial effect on flame size, luminosity, colour, visibility and lift-off distance. Reduced oxygen concentration increases the flame size and lift-off distance, and decreases luminosity and visibility. The HiTAC flame first became bluish and then non-visible at sufficiently low concentration of oxygen in the oxidiser. In this work, results are presented for the constant ratio between fuel jet velocity and velocity of co-flowing flue gases. This ratio was equal to 26.

Suggested Citation

  • Lille, Simon & Blasiak, Wlodzimierz & Jewartowski, Marcin, 2005. "Experimental study of the fuel jet combustion in high temperature and low oxygen content exhaust gases," Energy, Elsevier, vol. 30(2), pages 373-384.
    • Handle: RePEc:eee:energy:v:30:y:2005:i:2:p:373-384
    DOI: 10.1016/j.energy.2004.05.008
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    Cited by:

    1. Ti, Shuguang & Kuang, Min & Wang, Haopeng & Xu, Guangyin & Niu, Cong & Liu, Yannan & Wang, Zhenfeng, 2020. "Experimental combustion characteristics and NOx emissions at 50% of the full load for a 600-MWe utility boiler: Effects of the coal feed rate for various mills," Energy, Elsevier, vol. 196(C).
    2. Zhou, Kun & Lin, Qizhao & Hu, Hongwei & Hu, Huiqing & Song, Lanbo, 2017. "The ignition characteristics and combustion processes of the single coal slime particle under different hot-coflow conditions in N2/O2 atmosphere," Energy, Elsevier, vol. 136(C), pages 173-184.
    3. Wang, Feifei & Li, Pengfei & Mei, Zhenfeng & Zhang, Jianpeng & Mi, Jianchun, 2014. "Combustion of CH4/O2/N2 in a well stirred reactor," Energy, Elsevier, vol. 72(C), pages 242-253.
    4. He, Yizhuo & Zou, Chun & Song, Yu & Liu, Yang & Zheng, Chuguang, 2016. "Numerical study of characteristics on NO formation in methane MILD combustion with simultaneously hot and diluted oxidant and fuel (HDO/HDF)," Energy, Elsevier, vol. 112(C), pages 1024-1035.
    5. Jou, Chih-Ju G. & Wu, Chung-Rung & Lee, Chien-Li, 2010. "Reduction of energy cost and CO2 emission for the furnace using energy recovered from waste tail-gas," Energy, Elsevier, vol. 35(3), pages 1232-1236.

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