Gasification temperature measurement with flame emission spectroscopy
Gasification temperature measurement with flame emission spectroscopy
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DOI：
10.1016/j.fuel.2014.06.016
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发表时间：
2014-10
期刊：
影响因子：
7.4
通讯作者：
T. Parameswaran;R. Hughes;P. Gogolek;P. Hughes
中科院分区：
文献类型：
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作者：
T. Parameswaran;R. Hughes;P. Gogolek;P. Hughes
本文介绍了CanmetENERGY中试规模气流床气化设备内的温度测量结果，通过基于火焰发射光谱（FES）的光学传感器。在目前的工作中，冷却，净化，光纤探头插入到气化炉反应器，通过一端的接入端口，并耦合到一个小型便携式商业光谱仪在另一端，从气化炉火焰收集辐射。分析所获得的光谱以产生代表位于包围探针中心轴的8.8°角内的反应室区域的温度。在没有火焰时，仅从热外壳获得辐射，光谱导出的温度与壁装热电偶（TE）记录的温度范围相同。当火焰存在时，光谱温度通常不同于TE温度。运行后的光谱分析在数据采集的某些时段期间产生非常高的温度，表明各种类型的气化器燃烧器故障。在任何气化炉燃烧器故障事件期间，热电偶均未记录到类似的高温。由于热电偶故障，关闭后对气化炉进行检查，确认在运行期间发生了故障。这些结果表明，FES导出的温度是有用的监测气化炉的性能。进一步分析了数据，以探索其他火焰光谱特征，如Na和OH排放气化炉火焰诊断的有用性。
This paper presents the results of temperature measurements inside the CanmetENERGY pilot scale entrained flow gasification facility by means of an optical sensor based on flame emission spectroscopy (FES). In the present work a cooled, purged, fibre optic probe inserted into the gasifier reactor, through an access port at one end and coupled to a small portable commercial spectrometer at the other end, collected radiation from the gasifier flame. The acquired spectra were analyzed to yield temperatures representing the reaction chamber region lying within an angle of 8.8° enclosing the central axis of the probe. In the absence of a flame when radiation was acquired only from the hot enclosure, spectrally derived temperatures were in the same range as those recorded by wall mounted thermocouples (TE). When a flame was present spectral temperatures generally differed from the TE temperatures. Analysis of the spectra after the run yielded very high temperatures during certain periods of data acquisition indicating various types of gasifier burner malfunction. The thermocouples did not record similar high temperatures during any of the gasifier burner malfunction events. Examination of the gasifier after shut down, due to failure of a thermocouple, confirmed a malfunction had occurred during the operational period. These results show that FES derived temperatures are useful for monitoring gasifier performance. The data was further analyzed to explore the usefulness of other flame spectral features such as Na and OH emission for gasifier flame diagnostics.