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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

Reference

[1] Chen, S.L., Kramlich, J.C., 1989. Optimization of reburning for advanced NOx control on Coal-fired boilers. Control Technology, 39(10):1375-1379.

[2] Chen, S.L., Lyon, R.K., 1991. Advanced non-catalytic post combustion NOx control. Environmental Progress, 10(3):182-185.

[3] Furrer, J., Deuber, H., 1998. Balance of NH3 and behavior of polychlorinated dioxins and furans in the course of the selective non-catalytic reduction of nitric oxide at the TAMARA waste incineration plant. Waste Management, 18:417-422.

[4] Glarborg, P., Miller, J.A., 1994. Modeling the thermal DENOx process in flow reactions. surface effects and nitrogen oxide formation. International Journal of Chemical Kinetics, 26:421-436.

[5] Hampartsoumian, E., Folayan, O.O., 2003. Optimisation of NOx reduction in advanced coal reburning systems and the effect of coal type. Fuel, 82:373-384.

[6] Kasuya, F., Glarborg, P., 1995. The thermal DeNOx process: influence of partial pressures and temperature. Chemical Engineering Science, 50(9):1455-1466.

[7] Liu, H., Hampartsoumian, E., Gibbs, B.M., 1997. Evaluation of the optimal fuel characteristics for efficient NO reduction by coal reburning. Fuel, 76(11):985-993.

[8] Ljungdahl, B., Larfeldt, J., 2001. Optimised NH3 injection in CFB boilers. Powder Technology, 120:55-62.

[9] Miller, J.A., Bowman, G.T., 1989. Mechanism and modeling of nitrogen chemistry in combustion. Prog Energy Combust Sci, 15:287-338.

[10] Nimmo, W., Patsias, A.A., Hampartsoumian, E., Gibbs, B.M., Fairweather, M., Williams, P.T., 2004. Calcium magnesium acetate and urea advanced reburning for NO control with simultaneous SO2 reduction. Fuel, 83:1143-1150.

[11] Priddle, R., 1998. IEA World Engery Outlook, Paris. Radojevic, M., 1998. Reduction of nitrogen oxides in flue gases. Environmental Pollution, 102(s1):685-689.

[12] Rota, R., Zanoelo, E.F., 2000. Analysis of thermal DeNOx process at high partial pressure of reactants. Chemical Engineering Science, 55:1041-1051.

[13] Rota, R., Antos, D., 2002. Experimental and modeling analysis of the NOxOUT process. Chemical Engineering Science, 57:27-38.

[14] Smoot, L.D., 1998. NOx control through reburning. Prog Energy Combust Sci, 24:385-408.

[15] Stallings, J., 2000. Cardinal 1 Selective Non-Catalytic Reduction (SNCR) Demonstration Test Program. Report NO. 000000000001000154, EPRI, Palo, Alto, CA.

[16] Suhlmann, J., Rotzoll, G., 1993. Experimental characterization of the influence of CO on the high-temperature reduction of NO by NH3. Fuel, 72:175-179.

[17] Tree, D.R., Clark, A.W., 2000. Advanced reburning measurements of temperature and species in a pulverized coal flame. Fuel, 79:1687-1695.

[18] Zamansky, V.M., 1997. Second Generation Advanced Reburning for High Efficiency NOx Control. DOE Report No. DE-AC22-95PC95251, EER Corporation.

[19] Zamansky, V.M., Rusli, D., 1999. Reactions of sodium species in the promoted SNCR process. Combustion and Flame, 117:821-831.

[20] Zandaryaa, S., Gavasci, R., 2001. Nitrogen oxides from waste incineration: control by selective non-catalytic reduction. Chemosphere, 42:491-497.

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