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Optical Coal Particle Temperature Measurement under Oxy-Fuel Conditions: Measurement Methodology and Initial Results

机译：氧气条件下的光学煤粉温度测量：测量方法和初步结果

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摘要

Coal combustion under oxy-fuel conditions shows significant differences to combustion in air. Examinations on the single-grain level give detailed insight into the combustion phenomena of ignition, volatile combustion, and char burnout and, therefore, provide the fundamentals for the development of large-scale oxy-fuel facilities. The combustion of a hard coal in a size fraction of d_p = 90-125 μm was investigated in a laminar flow reactor at a temperature of 1500 K. The gaseous fuel oxidizer contained 3 % O2 by volume and CO2 or N2 as diluents. A third measurement in a CO2-rich atmosphere containing 9 % O2 is also presented to show the influence of O2 concentration. Particle temperatures were measured for three residence times with an imaging two-color pyrometer.
机译：含氧燃料条件下的煤炭燃烧显示出与空气燃烧的显着差异。单粒级考试可以深入了解点火，挥发燃烧和焦炭烧尽的燃烧现象，因此，为大型含氧燃料设施的开发提供了基础。在层流反应器中在1500 K的温度下研究了d_p = 90-125μm尺寸分数的硬煤燃烧。气态燃料氧化剂包含3％体积的O2和CO2或N2作为稀释剂。还提出了在含9％O2的富含CO2的气氛中进行的第三次测量，以显示O2浓度的影响。用成像双色高温计测量颗粒温度三个停留时间。

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