基于OH-PLIF测量技术的煤粉射流火焰着火燃烧特性
|
摘要
在光学诊断型煤粉燃烧器系统上研究煤粉着火燃烧特性,利用ICMOS相机捕捉射流火焰总光强信号、自发辐射信号以及PLIF荧光信号,根据获得信号的品质,判断各种测试手段的优缺点.计算射流火焰总光强和PLIF荧光信号的着火延迟时间,分析PLIF测量手段的可靠性,结合OH-PLIF技术的瞬态图像,以及着火延迟时间的变化规律,分析射流火焰挥发分着火及燃烧特性.研究结果表明,颗粒群着火是挥发分先析出着火燃烧,然后加热焦炭颗粒燃烧的过程.
The ignition and combustion characteristics of a pulverized coal(PC)reactor system were studied via optical diagnosis. The OH* spontaneous emission signal,total light intensity signal and the OH-PLIF fluorescence signal of the powder jet flame were captured by ICMOS. The advantages and disadvantages of different measurement techniques were analyzed,respectively. The ignition delay time of the latter two was simultaneously calculated,thereby analyzing the reliability of the PLIF measurement method. Based on the combination of the OHPLIF diagnostic fluorescence image and ignition delay time,the ignition and combustion characteristics of the volatile jet flame were elaborated. The results show that the PC cloud ignition is a process in which volatiles are burned first and then char particles are heated up.
The ignition and combustion characteristics of a pulverized coal(PC)reactor system were studied via optical diagnosis. The OH* spontaneous emission signal,total light intensity signal and the OH-PLIF fluorescence signal of the powder jet flame were captured by ICMOS. The advantages and disadvantages of different measurement techniques were analyzed,respectively. The ignition delay time of the latter two was simultaneously calculated,thereby analyzing the reliability of the PLIF measurement method. Based on the combination of the OHPLIF diagnostic fluorescence image and ignition delay time,the ignition and combustion characteristics of the volatile jet flame were elaborated. The results show that the PC cloud ignition is a process in which volatiles are burned first and then char particles are heated up.
引文
[1]Essenhigh R H.On the inter-influence of classical heterogeneous combustion research and related aerospace problems[J].Symposium on Combustion,1967,11(1):291-308.
[2]Azuhata S,Narato K,Kobayashi H,et al.A study of gas composition profiles for low NOx pulverized coal combustion and burner scale-up[J].Symposium on Combustion,1988,21(1):1199-1206.
[3]岑可法.高等燃烧学[M].杭州:浙江大学出版社,2002.Cen Kefa.Advanced Combustion Theory[M].Hangzhou:Zhejiang University Press,2002(in Chinese).
[4]Zhao Y,Kim H Y,Yoon S S.Transient group combustion of the pulverized coal particles in spherical cloud[J].Fuel,2007,86(7/8):1102-1111.
[5]Essenhigh R H,Howard J B.Repy to comments."Toward a unified combustion theory"[J].Industrial&Engineering Chemistry,1966,58(6):76.
[6]Gururajan V S,Wall T F,Gupta R P,et al.Mechanisms for the ignition of pulverized coal particles[J].Combustion&Flame,1990,81(2):119-132.
[7]Howard J B,Essenhigh R H.Mechanism of solidpartical combustion with simultaneous gas-phase volatiles combustion[J].Symposium on Combustion,1967,11(1):399-408.
[8]Schiemann M,Scherer V,Wirtz S.Optical coal particle temperature measurement under oxy-fuel conditions:Measurement methodology and initial results[J].Chemical Engineering&Technology,2010,32(12):2000-2004.
[9]Kim J D,Kim G B,Chang Y J,et al.Examination of flame length for burning pulverized coal in laminar flow reactor[J].Journal of Mechanical Science and Technology,2010,24(12):2567-2575.
[10]Levendis Y A,Joshi K,Khatami R,et al.Combustion behavior in air of single particles from three different coal ranks and from sugarcane bagasse[J].Combustion&Flame,2011,158(3):452-465.
[11]Khatami R,Stivers C,Joshi K,et al.Combustion behavior of single particles from three different coal ranks and from sugar cane bagasse in O2/N2 and O2/CO2atmospheres[J].Combustion&Flame,2012,159(3):1253-1271.
[12]Riaza J,Khatami R,Levendis Y A,et al.Single particle ignition and combustion of anthracite,semianthracite and bituminous coals in air and simulated oxyfuel conditions[J].Combustion&Flame,2014,161(4):1096-1108.
[13]Molina A,Shaddix C R.Ignition and devolatilization of pulverized bituminous coal particles during oxygen/carbon dioxide coal combustion[J].Proceedings of the Combustion Institute,2007,31(2):1905-1912.
[14]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(2):2091-2098.
[15]Seung M H,Ryoichi Kurose,Fumiteru Akamatsu,et al.Application of optical diagnostics techniques to a laboratory-scale turbulent pulverized coal flame[J].Energy&Fuels,2005,19(2):382-392.
[16]Hayashi J,Hashimoto N,Nakatsuka N,et al.Soot formation characteristics in a lab-scale turbulent pulverized coal flame with simultaneous planar measurements of laser induced incandescence of soot and Mie scattering of pulverized coal[J].Proceedings of the Combustion Institute,2013,34(2):2435-2443.
[17]Balusamy S,Kamal M M,Lowe S M,et al.Laser diagnostics of pulverized coal combustion in O2/N2 and O2/CO2 conditions:Velocity and scalar field measurements[J].Experiments in Fluids,2015,56(5):1-16.
[18]K?ser J,Becker L G,Go?mann A K,et al.Investigation of ignition and volatile combustion of single coal particles within oxygen-enriched atmospheres using highspeed OH-PLIF[J].Proceedings of the Combustion Institute,2017,36(2):2103-2111.
[19]朱文堃,邹高鹏,张蕾,等.基于光学诊断技术的煤粉射流火焰着火燃烧特性研究[J].中国电机工程学报,2018,38(3):840-849.Zhu Wenkun,Zou Gaopeng,Zhang Lei,et al.Pulverized coal stream ignition and combustion characteristics based on multiple optical diagnostic techniques[J].Proceedings of the CSEE,2018,38(3):840-849(in Chinese).
[20]Li S,Marshall J S,Liu G,et al.Adhesive particulate flow:The discrete-element method and its application in energy and environmental engineering[J].Progress in Energy&Combustion Science,2011,37(6):633-668.
[21]Ye Y,Li S,Li G,et al.The transition of heterogeneous-homogeneous ignitions of dispersed coal particle streams[J].Combustion&Flame,2014,161(9):2458-2468.
[22]Du X,Annamalai K.The transient ignition of isolated coal particle[J].Combustion&Flame,1994,97(3/4):339-354.
[23]孙锐,张鑫,Kelebopile L,等.燃烧中气化半焦孔隙结构特性变化实验研究[J].中国电机工程学报,2012,32(11):35-40.Sun Rui,Zhang Xin,Kelebopile L,et al.Experimental study on pore structure changing of gasified coal char under combustion[J].Proceedings of the CSEE,2012,32(11):35-40(in Chinese).
[2]Azuhata S,Narato K,Kobayashi H,et al.A study of gas composition profiles for low NOx pulverized coal combustion and burner scale-up[J].Symposium on Combustion,1988,21(1):1199-1206.
[3]岑可法.高等燃烧学[M].杭州:浙江大学出版社,2002.Cen Kefa.Advanced Combustion Theory[M].Hangzhou:Zhejiang University Press,2002(in Chinese).
[4]Zhao Y,Kim H Y,Yoon S S.Transient group combustion of the pulverized coal particles in spherical cloud[J].Fuel,2007,86(7/8):1102-1111.
[5]Essenhigh R H,Howard J B.Repy to comments."Toward a unified combustion theory"[J].Industrial&Engineering Chemistry,1966,58(6):76.
[6]Gururajan V S,Wall T F,Gupta R P,et al.Mechanisms for the ignition of pulverized coal particles[J].Combustion&Flame,1990,81(2):119-132.
[7]Howard J B,Essenhigh R H.Mechanism of solidpartical combustion with simultaneous gas-phase volatiles combustion[J].Symposium on Combustion,1967,11(1):399-408.
[8]Schiemann M,Scherer V,Wirtz S.Optical coal particle temperature measurement under oxy-fuel conditions:Measurement methodology and initial results[J].Chemical Engineering&Technology,2010,32(12):2000-2004.
[9]Kim J D,Kim G B,Chang Y J,et al.Examination of flame length for burning pulverized coal in laminar flow reactor[J].Journal of Mechanical Science and Technology,2010,24(12):2567-2575.
[10]Levendis Y A,Joshi K,Khatami R,et al.Combustion behavior in air of single particles from three different coal ranks and from sugarcane bagasse[J].Combustion&Flame,2011,158(3):452-465.
[11]Khatami R,Stivers C,Joshi K,et al.Combustion behavior of single particles from three different coal ranks and from sugar cane bagasse in O2/N2 and O2/CO2atmospheres[J].Combustion&Flame,2012,159(3):1253-1271.
[12]Riaza J,Khatami R,Levendis Y A,et al.Single particle ignition and combustion of anthracite,semianthracite and bituminous coals in air and simulated oxyfuel conditions[J].Combustion&Flame,2014,161(4):1096-1108.
[13]Molina A,Shaddix C R.Ignition and devolatilization of pulverized bituminous coal particles during oxygen/carbon dioxide coal combustion[J].Proceedings of the Combustion Institute,2007,31(2):1905-1912.
[14]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(2):2091-2098.
[15]Seung M H,Ryoichi Kurose,Fumiteru Akamatsu,et al.Application of optical diagnostics techniques to a laboratory-scale turbulent pulverized coal flame[J].Energy&Fuels,2005,19(2):382-392.
[16]Hayashi J,Hashimoto N,Nakatsuka N,et al.Soot formation characteristics in a lab-scale turbulent pulverized coal flame with simultaneous planar measurements of laser induced incandescence of soot and Mie scattering of pulverized coal[J].Proceedings of the Combustion Institute,2013,34(2):2435-2443.
[17]Balusamy S,Kamal M M,Lowe S M,et al.Laser diagnostics of pulverized coal combustion in O2/N2 and O2/CO2 conditions:Velocity and scalar field measurements[J].Experiments in Fluids,2015,56(5):1-16.
[18]K?ser J,Becker L G,Go?mann A K,et al.Investigation of ignition and volatile combustion of single coal particles within oxygen-enriched atmospheres using highspeed OH-PLIF[J].Proceedings of the Combustion Institute,2017,36(2):2103-2111.
[19]朱文堃,邹高鹏,张蕾,等.基于光学诊断技术的煤粉射流火焰着火燃烧特性研究[J].中国电机工程学报,2018,38(3):840-849.Zhu Wenkun,Zou Gaopeng,Zhang Lei,et al.Pulverized coal stream ignition and combustion characteristics based on multiple optical diagnostic techniques[J].Proceedings of the CSEE,2018,38(3):840-849(in Chinese).
[20]Li S,Marshall J S,Liu G,et al.Adhesive particulate flow:The discrete-element method and its application in energy and environmental engineering[J].Progress in Energy&Combustion Science,2011,37(6):633-668.
[21]Ye Y,Li S,Li G,et al.The transition of heterogeneous-homogeneous ignitions of dispersed coal particle streams[J].Combustion&Flame,2014,161(9):2458-2468.
[22]Du X,Annamalai K.The transient ignition of isolated coal particle[J].Combustion&Flame,1994,97(3/4):339-354.
[23]孙锐,张鑫,Kelebopile L,等.燃烧中气化半焦孔隙结构特性变化实验研究[J].中国电机工程学报,2012,32(11):35-40.Sun Rui,Zhang Xin,Kelebopile L,et al.Experimental study on pore structure changing of gasified coal char under combustion[J].Proceedings of the CSEE,2012,32(11):35-40(in Chinese).
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |