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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.3 P.187-194

http://doi.org/10.1631/jzus.2005.B0187


Experiment and mechanism investigation on advanced reburning for NOx reduction: influence of CO and temperature


Author(s):  WANG Zhi-hua, ZHOU Jun-hu, ZHANG Yan-wei, LU Zhi-min, FAN Jian-ren, CEN Ke-fa

Affiliation(s):  Clean Energy & Environment Engineering Key Laboratory of Ministry of Education, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   wangzh@sun.zju.edu.cn

Key Words:  NO reduction, Advanced burning, Coal reburning, Selective Non-catalytic NOx Reduction (SNCR), CO


WANG Zhi-hua, ZHOU Jun-hu, ZHANG Yan-wei, LU Zhi-min, FAN Jian-ren, CEN Ke-fa. Experiment and mechanism investigation on advanced reburning for NOx reduction: influence of CO and temperature[J]. Journal of Zhejiang University Science B, 2005, 6(3): 187-194.

@article{title="Experiment and mechanism investigation on advanced reburning for NOx reduction: influence of CO and temperature",
author="WANG Zhi-hua, ZHOU Jun-hu, ZHANG Yan-wei, LU Zhi-min, FAN Jian-ren, CEN Ke-fa",
journal="Journal of Zhejiang University Science B",
volume="6",
number="3",
pages="187-194",
year="2005",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2005.B0187"
}

%0 Journal Article
%T Experiment and mechanism investigation on advanced reburning for NOx reduction: influence of CO and temperature
%A WANG Zhi-hua
%A ZHOU Jun-hu
%A ZHANG Yan-wei
%A LU Zhi-min
%A FAN Jian-ren
%A CEN Ke-fa
%J Journal of Zhejiang University SCIENCE B
%V 6
%N 3
%P 187-194
%@ 1673-1581
%D 2005
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2005.B0187

TY - JOUR
T1 - Experiment and mechanism investigation on advanced reburning for NOx reduction: influence of CO and temperature
A1 - WANG Zhi-hua
A1 - ZHOU Jun-hu
A1 - ZHANG Yan-wei
A1 - LU Zhi-min
A1 - FAN Jian-ren
A1 - CEN Ke-fa
J0 - Journal of Zhejiang University Science B
VL - 6
IS - 3
SP - 187
EP - 194
%@ 1673-1581
Y1 - 2005
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2005.B0187


Abstract: 
Pulverized COal reburning%29&ck%5B%5D=abstract&ck%5B%5D=keyword'>COlor=#2f4a8b>COal reburning, ammonia injection and advanced reburning in a pilot scale drop tube furnace were investigated. Premix of petroleum gas, air and NH3 were burned in a porous gas burner to generate the needed flue gas. Four kinds of pulverized COal were fed as reburning fuel at COnstant rate of 1 g/min. The COal reburning%29&ck%5B%5D=abstract&ck%5B%5D=keyword'>COlor=#2f4a8b>COal reburning process parameters including 15%~25% reburn heat input, temperature range from 1100 °C to 1400 °C and also the carbon in fly ash, COal fineness, reburn zone stoichiometric ratio, etc. were investigated. On the COndition of 25% reburn heat input, maximum of 47% COlor=#2f4a8b>NO reduction with Yanzhou COal was obtained by pure COal reburning%29&ck%5B%5D=abstract&ck%5B%5D=keyword'>COlor=#2f4a8b>COal reburning. Optimal temperature for reburning is about 1300 °C and fuel-rich stoichiometric ratio is essential; COal fineness can slightly enhance the reburning ability. The temperature window for ammonia injection is about 700 °C~1100 °C. CO can improve the NH3 ability at lower temperature. During advanced reburning, 72.9% COlor=#2f4a8b>NO reduction was measured. To achieve more than 70% COlor=#2f4a8b>NO reduction, COlor=#2f4a8b>selective Non-catalytic NOx Reduction (SNCR) should need NH3/NO stoichiometric ratio larger than 5, while advanced reburning only uses COmmon dose of ammonia as in COnventional SNCR technology. Mechanism study shows the oxidization of CO can improve the deCOmposition of H2O, which will rich the radical pools igniting the whole reactions at lower temperatures.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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