本文阐述了煤粉颗粒在O2/N2和O2/H2O气氛下着火的实验研究,氧气浓度为21％,30％,35％,40％和50％.实验在滴管炉中进行,采用高速摄像仪来记录煤粉颗粒在炉内的燃烧情况.实验中采用了烟煤(SF)和贫煤(XW)两种煤粉颗粒,粒径为97～105 μm.实验结果表明在相同的氧气浓度下,煤粉颗粒在水蒸气气氛下的着火点位置比在氮气气氛下提前,可能的原因是高水蒸气浓度下水蒸气气化反应和水气转换反应的存在.煤阶对着不同气氛下火点位置间隔有较大的影响.
参考文献
| [1] | Lei Chen;Sze Zheng Yong;Ahmed F. Ghoniem .Oxy-fuel combustion of pulverized coal: Characterization, fundamentals, stabilization and CFD modeling[J].Progress in energy and combustion science,2012(2):156-214. |
| [2] | P. Edge;M. Gharebaghi;R. Irons .Combustion modelling opportunities and challenges for oxy-coal carbon capture technology[J].Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers,2011(9):1470-1493. |
| [3] | B.J.P. Buhre;L.K. Elliott;C.D. Sheng;R.P. Gupta;T.F. Wall .Oxy-fuel combustion technology for coal-fired power generation[J].Progress in energy and combustion science,2005(4):283-307. |
| [4] | Terry Wdll;Yinghui Liu;Chris Spero .An overview on oxyfuel coal combustion-State of the art research and technology development[J].Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers,2009(8):1003-1016. |
| [5] | Reza Khatami;Chris Stivers;Yiannis A. Levendis .Ignition characteristics of single coal particles from three different ranks in O_2/N_2 and O_2/CO_2 atmospheres[J].Combustion and Flame,2012(12):3554-3568. |
| [6] | Paula A. Bejarano;Yiannis A. Levendis .Single-coal-particle combustion in O_2/N_2 and O_2/CO_2 environments[J].Combustion and Flame,2008(1/2):270-287. |
| [7] | Rastko Jovanovic;Aleksandra Milewska;Bartosz Swiatkowski;Adrian Goanta;Hartmut Spliethoff .Numerical investigation of influence of homogeneous/heterogeneous ignition/combustion mechanisms on ignition point position during pulverized coal combustion in oxygen enriched and recycled flue gases atmosphere[J].International Journal of Heat and Mass Transfer,2011(4):921-931. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%