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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2012, Vol. 13 Issue (12): 969-978    DOI: 10.1631/jzus.A1200168
Environmental Engineering     
Method for determining effective flame emissivity in a rotary kiln incinerator burning solid waste
Jin-cai Du, Qun-xing Huang, Jian-hua Yan
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China
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Abstract  Temperature is the most important parameter for the improvement of combustion efficiency and the control of pollutants. In order to obtain accurate flame temperatures in a rotary kiln incinerator using non-intrusive thermographic method, the effective flame emissivity was studied. A combined narrow- and wide-band model and Mie scattering method were used to calculate the radiative properties for gases and fly-ash particles under different combustion conditions. The effects of the air/waste ratio and fly-ash particles on the effective flame emissivity were discussed. The results of numerical calculations showed that the effective emissivity decreased from 0.90 to 0.80 when the air/waste ratio increased from 1.0 to 1.8, and the effect of the fly-ash particles was ignorable under the conditions discussed in this paper. Experimental measurement results indicated that the accuracy of the thermographic temperature measurements improved significantly if the setting of the flame emissivity was adjusted according to the air/waste ratio.

Key wordsThermographic temperature measurement      Effective flame emissivity      Rotary kiln incinerator      Air/waste equivalence ratio     
Received: 04 July 2012      Published: 29 November 2012
CLC:  TK124  
Cite this article:

Jin-cai Du, Qun-xing Huang, Jian-hua Yan. Method for determining effective flame emissivity in a rotary kiln incinerator burning solid waste. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2012, 13(12): 969-978.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1200168     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2012/V13/I12/969

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