煤粉着火燃烧过程光学诊断研究发展  

Research progress on the optical diagnostics of pulverized coal ignition and combustion process

作　　者：齐洪亮 孙锐[1] 彭江波[2] 于欣[2] 朱文堃 曹振 于杨 高龙[2] 张泽岳 QI Hongliang;SUN Rui;PENG Jiangbo;YU Xin;ZHU Wenkun;CAO Zhen;YU Yang;GAO Long;ZHANG Zeyue(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;National Key Laboratory of Science and Technology on Tunable Laser,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《洁净煤技术》2021年第1期95-107,共13页Clean Coal Technology

基　　金：国家重点研发计划资助项目(2017YFB0602002);国家自然科学基金重点资助项目(51536002)。

摘　　要：煤炭储量丰富,尽管新能源和可再生能源快速发展,煤炭资源在未来几十年仍将作为我国一次能源重要组成部分。同时煤炭利用带来很多环境污染问题,因此未来煤炭资源的利用逐渐向高效、低碳、低污染物排放利用方式转变。随着光学技术的不断发展,涌现出多种适用于煤粉燃烧诊断的原位非接触式光学诊断技术,极大地促进了燃烧学的发展,为煤炭清洁高效利用提供了更多试验手段。介绍了国内外煤粉着火、不同方式下燃烧特性的光学诊断研究进展,对煤粉单颗粒和煤粉颗粒流的着火燃烧过程的光学诊断研究进行总结。目前常用的煤粉燃烧光学诊断技术主要包括全光谱成像、CH*/C2*化学发光成像、平面激光诱导荧光(PLIF)、双色/三色高温计、米氏散射、激光诱导白炽光、相干反斯托克斯-拉曼光谱、激光诱导击穿光谱等多种先进的光学诊断技术,可对煤粉单颗粒、颗粒流的着火延迟、脱挥发分、挥发分燃烧、着火模式、环境因素(环境温度、氧浓度、气氛)、富氧燃烧、水-氧燃烧、煤中碱金属释放等多方面关键问题进行光学诊断研究,为煤炭清洁高效利用提供了理论和试验基础。采用OH-PLIF和三色高温计对热解半焦和神华烟煤混合燃料共燃的着火和燃烧特性进行研究。综合考虑着火延迟和混合物的燃尽率,热解半焦的最佳掺混比为20%,为热解半焦的实际工业应用提供了参考。同时采用500 Hz、5 k Hz高时间、空间分辨率的OH-PLIF技术探究煤粉颗粒流中单颗粒挥发分燃烧的发展过程和挥发分着火的时序演变过程,通过二者的结合获得煤粉颗粒流从着火到挥发分燃烧的时间特性。采用OH-PLIF技术对烟煤和褐煤煤粉颗粒流燃烧火焰的脱挥发分和挥发分燃烧行为进行探究,提出采用OH信号径向分布的相对标准偏差探究火焰稳定性的方法。相同燃烧条件下,烟煤煤粉�Coal,as an important fossil fuel,has abundant reserves.Despite the rapid development of new and renewable energy,coal resources will continue to be an important part of China's primary energy in the coming decades.However,the utilization of coal brings a lot of environmental pollution problems.As a result,the utilization of China's coal resources gradually transforms to the high efficiency,low carbon,and low NO x technology.With the rapid development of optical diagnostics technology,a variety of in situ non-invasive optical diagnostic techniques that is suitable for pulverized coal combustion diagnosis have emerged,which greatly promotes the development of the combustion science and provides more experimental methods for the clean and efficient utilization of coal.In this paper,the research progress of optical diagnosis on ignition and combustion characteristics of pulverized coal in different ways at home and abroad was introduced.The optical diagnostics research progress on ignition and combustion process of pulverized coal for both single particle and particle streams was summarized.At present,the optical diagnostic techniques used for pulverized coal combustion includes:full spectrum imaging,CH*/C*2 chemiluminescence imaging,planar laser induced fluorescence(PLIF),double color/three-color pyrometer,Mie scattering,laser induced incandescence(LII),coherent anti stokes Raman spectroscopy(CARS),laser-induced breakdown spectroscopy(LIBS)and so on.The optical diagnosis research on ignition delay,devolatilization,volatile combustion,ignition mode,environmental factors(ambient temperature,oxygen concentration,atmosphere),oxy-fuel combustion,oxy-steam combustion,the release of alkali metals for both single particle and particle streams was analyzed to provide theoretical and experimental foundation for clean and efficient utilization of coal.The ignition and combustion characteristics of pyrolyzed char and Shenhua bituminous coal blended fuel were studied by using OH-PLIF and three-color pyrometer.Considering the ign

关 键 词：煤粉着火 煤粉热解 单颗粒 颗粒流 光学诊断技术 

分 类 号：TK229.63[动力工程及工程热物理—动力机械及工程] TK224.11