In this paper, a new NOx removal control technique coupled with energy recovery in a sintering plant is proposed. On the basis of energy calculation, it was found that the energy of sintered ore was large enough to supply the energy necessary to heat effluent flue gas to the catalytic temperature window. Moreover, the experimental results showed that sintered ore had a significant effect on catalytic reducing NO with adding NH3. The maximum NO catalytic reduction efficiency could reach 38% at 673 K, which means that the effluent flue gas from a sinter machine did not need further treatment to reach the limit of national pollutants emission standard of China.
Get full access to this article
View all access options for this article.
References
1.
HanJKimH and WataruM: ‘The synergetic effect of plasma and catalyst on simultaneous removal of SO2 and NOx’, Asia-Pac. J. Chem. Eng., 2010, 5, 441–446.
2.
statisticsN b o (ed.): ‘China statistical yearbook on environment’; Beijing, China Statistic Press.
3.
‘Emission standard of air pollutants for sintering and pelletizing of iron and steel industry’, GB 28662-2012, Beijing, China, 2012.
4.
HanJKimHSakaguchiY and MinamiW: ‘Reduction of NOx and SO2 in a non-thermal plasma reactor combined with catalyst and methanol’, J. Phys. D, 2008, 41D, 205213.
5.
MokYS and NamI.-S: ‘Positive pulsed corona discharge process for simultaneous removal of SO2 and NOx from iron-ore sintering flue gas’, IEEE Trans. Plasma Sci., 1999, 27, (4), 1188–1196.
6.
JangS.-DSonY.-GOHJ.-S and ChoiM.-H: ‘Pulsed plasma process for flue gas removal from an industrial incinerator by using a peak 200-kV, 10-kA pulse modulator’, J. Korean Phys. Soc., 2004, 44, (5), 1157–1162.
7.
ChenY.-GGuoZ.-C and WangZ: ‘Application of modified coke to NOx reduction with recycling flue gas during iron ore sintering process’, ISIJ Int., 2008, 48, (11), 1517–1523.
8.
MaS.-CJinY.-JJinXYaoJ.-JZhangBDongS and ShiR.-X: ‘Influences of co-existing components in flue gas on simultaneous desulfurization and NOx removal using microwave irradiation over activated carbon’, J. Fuel Chem. Technol., 2011, 39, (6), 460–464.
9.
SumathiSBhatiaSLeeKT and MohamedAR: ‘Performance of an activated carbon made from waste palm shell in simultaneous adsorption of SOx and NOx of flue gas at low temperature’, Sci. China E, 2009, 52E, (1), 198–203.
10.
LiNZhangYLiYMChenMXDongXY and ZhouJT: ‘Reduction of Fe(II)EDTA-NO using Paracoccus denitrificans and changes of Fe(II)EDTA in the system’, J. Chem. Technol. Biotechnol., 2013, 88, 311–316.
11.
DongXZhangYZhouJChenMWangX and ShiZ: ‘Fe(II)EDTA–NO reduction coupled with Fe(II)EDTA oxidation by a nitrate- and Fe(III)-reducing bacterium’, Bioresour. Technol., 2013, 138, 339–344.
12.
SmithKLaniDBeriskoDSchultzCCarlsonW and BensonLB: ‘Enhanced NOx removal in wet scrubbers using chelates’, Report DOE/PC/90362-T1, U.S.Department of Energy Pittsburgh Energy Technology Center, Dravo lime, USA,1992.
13.
ManCLeeZYoungC and SungY: ‘Application of SCR catalyst to sinter plant for NO/dioxin removal’, J. Wuhan Univ., 2012, 45, (6).
14.
YaoGWangFLuF and GuiK.-T: ‘Selective catalytic reduction of de-NOx from gas on iron based catalyst with magnetically fluizided beds’, J. Eng. Therm., 2011, 30, (6), 202–206.
15.
LeeG.-CCharngC.-T and LeeC.-S: ‘De-NOx system in sinter plant of china steel in taiwan’, Ironmaking Proc., Baltimore, USA, 2001, paper 79, 951–952.
16.
LiHXuQ and ZhangD: ‘Analysis on practical application problems of SCR technology in coal-fired power plants’, Adv. Mater. Res., 2011, 356–360, 1423–1426.
17.
LongRQ and YangRT: ‘Reaction mechanism of selective catalytic reduction of NO with NH3 over Fe-ZSM-5 catalyst’, J. Catal., 2002, 207, 224–231.
18.
BiXLiaoJXiongWZhouG and FengZ: ‘Catalytic effect of iron ores on the removal of nitrogen oxides in sintering exhaust gases’, Environ. Eng., 2006, 24, (6), 42–44.
19.
QiGYangR and ChangR: ‘Low-temperature SCR of NO with NH3 over USY-supported manganese oxide-based catalysts’, Catal. Lett., 2003, 87, (1–2), 67–71.
