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[1] Zheng Zhimin, Wang Hui, Yang Li, Wei Xing, et al. Comparative study on SO2 release and removalunder air and oxy-fuel combustion in a fluidized bed combustor [J]. Journal of Southeast University (English Edition), 2015, 31 (2): 232-237. [doi:10.3969/j.issn.1003-7985.2015.02.013]
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Comparative study on SO2 release and removalunder air and oxy-fuel combustion in a fluidized bed combustor()
流化床空气和富氧燃烧气氛下SO2的释放和脱除特性比较研究
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
31
Issue:
2015 2
Page:
232-237
Research Field:
Energy and Power Engineering
Publishing date:
2015-06-20

Info

Title:
Comparative study on SO2 release and removalunder air and oxy-fuel combustion in a fluidized bed combustor
流化床空气和富氧燃烧气氛下SO2的释放和脱除特性比较研究
Author(s):
Zheng Zhimin;  Wang Hui;  Yang Li;  Wei Xing;  Guo Yongjun;  Guo Shuai;  Wu Shaohua
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
郑志敏;  王辉;  杨利;  魏星;  郭永军;  郭帅;  吴少华
哈尔滨工业大学能源科学与工程学院, 哈尔滨150001
Keywords:
oxy-fuel combustion;  fluidized bed;  SO2 release;  limestone desulfuration
富氧燃烧;  流化床;  SO2释放;  石灰石脱硫
PACS:
TK224.1
DOI:
10.3969/j.issn.1003-7985.2015.02.013
Abstract:
SO2 release and removal were studied under both the air and oxy-fuel combustion conditions using an anthracite coal from the Jincheng mine in China on a bench-scale fluidized bed combustor(FBC). Special attention was paid to the effects of the combustion atmosphere, O2 concentration, bed temperature, and limestone addition. The released amount of SO2 was clearly higher under 30%O2/70%CO2 than that of the air atmosphere. As the O2 concentration in O2/CO2 mixture increased from 21% to 40%, the released amount of SO2 increased significantly, but then it decreased when the O2 concentration increased up to 50%. The bed temperature from 860 to 920 ℃ has no obvious influence on the the SO2 release but shows a strong influence on the desulfurization with limestone in both oxy-fuel and air conditions. The maximum SO2 removal efficiency appears to be at 880 to 900 ℃ for both the air and oxy-fuel combustion conditions.
在一个小型流化床试验台上比较了晋城无烟煤在空气和富氧燃烧下SO2的释放和脱除特性, 考察了燃烧气氛、氧浓度、床温和石灰石的添加等因素的影响.研究结果表明:在30% O2的富氧燃烧条件下SO2的释放量明显高于其在空气燃烧条件下的释放量;随着富氧燃烧气氛中O2浓度的增加(从21%增至40%), SO2的释放量显著增加, 当氧浓度达到50%时, SO2的释放量有下降的趋势.床温860~920 ℃对SO2的释放没有明显的影响, 但对其脱除有显著的影响.在空气和30% O2富氧气氛下, SO2的最佳脱硫温度均为880~900 ℃.

References:

[1] Kuivalainen R, Pikkarainen T, Leino T, et al. Development of CFB technology to provide flexible air/oxy operation for a power plant with CCS[C]//The 34th International Technical Conference on Coal Utilization & Fuel Systems. Clearwater, FL, USA, 2009.
[2] Nsakala N, Liljedahl G N, Turek D G, et al. Oxygen-fired circulating fluidized bed boilers for greenhouse gas emissions control and other applications [C]//The Second Annual National Conference on Carbon Sequestration. Alexandria, VA, USA, 2004.
[3] Jia L, Tan Y, Anthony E J, et al. Emissions of SO2 and NOxx during oxy-fuel CFB combustion tests in a mini-circulating fluidized bed combustion reactor [J]. Energy & Fuels, 2009, 24(2): 910-915.
[4] Jia L, Tan Y, Wang C, et al. Experimental study of oxy-fuel combustion and sulfur capture in a mini-CFBC [J]. Energy & Fuels, 2007, 21(6): 3160-3164.
[5] Duan L, Zhao C, Zhou W, et al. O2/CO2 coal combustion characteristics in a 50 kWth circulating fluidized bed [J]. International Journal of Greenhouse Gas Control, 2011, 5(4): 770-776.
[6] Tan Y, Croiset E, Douglas M A, et al. Combustion characteristics of coal in a mixture of oxygen and recycled flue gas [J]. Fuel, 2006, 85(4): 507-512.
[7] Wang L. Experimental and modeling study of SO2 behavior during oxy combustion in fluidized beds [D]. Salt Lake City, USA: Department of Chemical Engineering of the University of Utah, 2012.
[8] Duan L, Zhou W, Li H, et al. Sulfur fate during bituminous coal combustion in an oxy-fired circulating fluidized bed combustor [J]. Korean Journal of Chemical Engineering, 2011, 28(9): 1952-1955.
[9] Zheng L, Furimsky E. Assessment of coal combustion in O2+CO2 by equilibrium calculations [J]. Fuel Processing Technology, 2003, 81(1): 23-34.
[10] Mao Y, Fang M, Luo Z, et al. Calcination and desulfurization of limestone under O2/CO2 atmosphere [J]. Journal of Fuel Chemistry and Technology, 2004, 32(3):323-328.
[11] Liu H, Katagiri S, Kaneko U, et al. Sulfation behavior of limestone under high CO2 concentration in O2/CO2 coal combustion [J]. Fuel, 2000, 79(8):945-953.
[12] Dong X, Wang H, Liu H, et al. Study on SO2 emission under various atmospheres during coal combustion [J]. Journal of Environmental Sciences, 2003, 23(3):322-326.
[13] Du Y, Wang J, Wang X, et al. Analysis of pollutant discharge of coal combustion in oxygen-enriched atmosphere [J]. Coal Conversion, 2011, 34(3):75-78.
[14] Liu H, Qiu J, Xu Z, et al. Release of NO and SO2 in high-concentration CO2 atmosphere during coal combustion [J]. Journal of Engineering Thermophysics, 2008, 29(2): 354-356.
[15] Fleig D, Normann F, Andersson K, et al. The fate of sulphur during oxy-fuel combustion of lignite [J]. Energy Procedia, 2009, 1(1): 383-390.
[16] Ahn J, Okerlund R, Fry A, et al. Sulfur trioxide formation during oxy-coal combustion[J]. International Journal of Greenhouse Gas Control, 2011, 5(S1): 127-135.
[17] Anthony E J, Granatstein D L. Sulfation phenomena in fluidized bed combustion systems [J]. Progress in Energy and Combustion Science, 2001, 27(2): 215-236.
[18] Miura K, Mae K, Shimada M, et al. Analysis of formation rates of sulfur-containing gases during the pyrolysis of various coals [J]. Energy & Fuels, 2001, 15(3): 629-636.
[19] de Diego L F, Rufas A, García-Labiano F, et al. Optimum temperature for sulphur retention in fluidized beds working under oxy-fuel combustion conditions [J]. Fuel, 2013, 114:106-113.
[20] Chen C, Zhao C, Liang C, et al. Calcination and sintering characteristics of limestone under O2/CO2 combustion atmosphere [J]. Fuel Processing Technology, 2007, 88(2):171-178.
[21] Borgwardt R. Calcium oxide sintering in atmospheres containing water and carbon dioxide [J]. Industrial & Engineering Chemistry Research, 1989, 28(4): 493-500.

Memo

Memo:
Biographies: Zheng Zhimin(1983—), male, graduate; Wang Hui(corresponding author), male, associate professor, wanghui_hb@hit.edu.cn.
Foundation items: The National Natural Science Foundation for Young Scholars of China(No.51106038), the National Key Technology R& D Program of China during the 12th Five-Year Plan Period(No.2012BAA02B01-04).
Citation: Zheng Zhimin, Wang Hui, Yang Li, et al. Comparative study on SO2 release and removal under air and oxy-fuel combustion in a fluidized bed combustor[J].Journal of Southeast University(English Edition), 2015, 31(2):232-237.[doi:10.3969/j.issn.1003-7985.2015.02.013]
Last Update: 2015-06-20