全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

加压O2/CO2气氛下煤粉着火特性的实验研究

, PP. 44-49

Keywords: 煤粉,O2/CO2,着火温度,压力,氧浓度,煤焦结构

Full-Text   Cite this paper   Add to My Lib

Abstract:

研究了加压O2/CO2气氛下压力、氧浓度、煤焦结构和煤种等因素对大同烟煤和神火无烟煤着火特性的影响,并采用可燃性指数和综合燃烧特性指数评价不同压力下煤的着火和燃烧特性。加压热重实验结果表明,压力从0.1MPa升高至2MPa,着火温度先降低后升高,在1MPa下着火温度最低,燃烧特性最佳。在常压和加压条件下,提高氧浓度均可加快煤的着火。在常压下,随氧浓度提高,着火温度下降的幅度较小,但在加压时,较高氧浓度会改变着火模式,着火温度降低明显。扫描电镜分析显示加压促进煤在脱挥发分过程的破碎,提高碳氧反应速率,降低着火温度。煤的着火与煤种有关,挥发分含量较高的煤,其着火越容易。结果反映了加压富氧燃烧比常压富氧燃烧更有优越性。

References

[1]  Wang C,Lei M,Yan W,et al.Combustion characteristics and ash formation of pulverized coal under pressurized oxy-fuel conditions[J].Energy and Fuels,2011,25(10):4333-4344.
[2]  雷鸣,王春波,阎维平,等.大同烟煤增压富氧燃烧的热重实验研究[J].中国电机工程学报,2012,32(5):21-26. Lei Ming,Wang Chunbo,Yan Weiping,et al.Thermogravimetric research on pressurized oxy-fuel combustion of datong bituminous coal[J].Proceedings of the CSEE,2012,32(5):21-26(in Chinese).
[3]  Wu H,Bryant G,Benfell K,et al.An Experimental Study on the Effect of System Pressure on Char Structure of an Australian Bituminous Coal[J].Energy and Fuels,2000,14(2):282-290.
[4]  岑可法,姚强,骆仲泱,等.高等燃烧学[M].杭州:浙江大学出版社,2002:254-280. Cen Kefa,Yao Qiang,Luo Zhongyang,et al.Advanced combustion theory[M].Hangzhou:Zhejiang University Press,2002:254-280(in Chinese).
[5]  孙学信.燃煤锅炉燃烧试验技术与方法[M].北京:中国电力出版社,2002. Sun Xuexin.Technology and method of combustion experiments of pulverized coal furnace[M].Beijing:China Electric Power Press,2002(in Chinese).
[6]  Li Q Z,Zhao C S,Chen X P,et al.Comparison of pulverized coal combustion in air and in O2/CO2 mixtures by thermo-gravimetric analysis[J].Journal of Analytical and Applied Pyrolysis,2009,85(1-2):521-528.
[7]  李庆钊,赵长遂,武卫芳,等.基于TG-FTIR研究O2/CO2气氛下烟煤的燃烧特性[J].东南大学学报:自然科学版,2007,37(6):990-995. Li Qingzhao,Zhao Changsui,Wu Weifang,et al.Investigation on Characteristics of Bituminous coal Combustion in O2/CO2 mixtures based on TG-FTIR coupled Technology[J].Journal of Southeast University:Natural Science Edition,2007,37(6):990-995(in Chinese).
[8]  Chen L,Yong S Z,Ghoniem A F.Oxy-fuel combustion of pulverized coal:Characterization, fundamentals, stabilization and CFD modeling[J].Progress in Energy and Combustion Science,2012,38(2):156-214.
[9]  Fassbender A.Pressurized oxy-fuel combustion for multi- pollutant capture[C]//The 30th International Technical Conference on Coal Utilization and Fuel Systems.Clearwater,FL,USA:IEEE,2005.
[10]  Zheng L,Pomalis R,Clements B,et al.Optimization of a high pressure oxy-fuel combustion process for power generation and CO2 capture[C]//The 35th International Technical Conference on Clean Coal and Fuel Systems.Clearwater,FL,USA:IEEE,2010.
[11]  Gazzino M,Riccio G,Rossi N,et al.Pressurized oxy-coal combustion Rankine-cycle for future zero emission power plants: technological issues[C]//The Third International Conference on Energy Sustainability.San Francisco,CA,USA:IEEE,2009.
[12]  Hong J S,Chaudhry G,Brisson J G,et al.Analysis of oxy-fuel combustion power cycle utilizing a pressurized coal combustor[J].Energy,2009,34(9):1332-1340.
[13]  Hong J S,Field R,Gazzino M,et al.Operating pressure dependence of the pressurized oxy-fuel combustion power cycle[J].Energy,2010,35(12):5391-5399.
[14]  李庆钊,赵长遂.O2/CO2气氛煤粉燃烧特性试验研究[J].中国电机工程学报,2007,27(35):39-43. Li Qingzhao,Zhao Changsui.Investigation on characteristics of pulverized coal combustion in O2/CO2 mixtures[J].Proceedings of the CSEE,2007,27(35):39-43(in Chinese).
[15]  Shaddix C R,Molina A.Particle imaging of ignition and devolatilization of pulverized coal during oxy-fuel combustion[J].Proceedings of the Combustion Institute,2009,32(Part 2):2091-2098.
[16]  Qiao Y,Zhang L A,Binner E,et al.An investigation of the causes of the difference in coal particle ignition temperature between combustion in air and in O2/CO2 [J].Fuel,2010,89(11):3381-3387.
[17]  Sun C L,Zhang M Y.Ignition of coal particles at high pressure in a thermogravimetric analyzer[J].Combustion and Flame,1998,115(1-2):267-274.
[18]  孙晨亮,章名耀.压力下各种因素对煤粒着火温度的影响[J].燃烧科学与技术,1999,5(3):313-318. Sun Chenliang,Zhang Mingyao.Effects of various factors on the ignition temperature of coal particles under Pressure[J].Journal of Combustion Science and Technology,1999,5(3):313-318(in Chinese).
[19]  Saastamoinen J J,Aho M J,Hamalainen J P,et al.Pressurized pulverized fuel combustion in different concentrations of oxygen and carbon dioxide[J].Energy and Fuels,1996,10(1):121-133.
[20]  Joutsenoja T,Saastamoinen J,Aho M,et al.Effects of pressure and oxygen concentration on the combustion of different coals[J].Energy and Fuels,1999,13(1):130-145.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133