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为了研究输送带速度和光谱仪安装高度对近红外在线检测秸秆-煤混燃物的影响。该研究收集并制备秸秆样品80个、煤样品9个,制备秸秆质量分数为70%～99%的秸秆-煤混燃物样品120个(质量分数增量为1%)、秸秆质量分数为1%～30%的秸秆-煤混燃物样品120个(质量分数增量为1%)。在输送带速度分别为300、600、1 000和1 400 mm/s,光谱仪安装高度分别为50、56、59和65 mm的条件下,使用Thermo Fisher Scientific Antaris Target FT-NIR型光谱仪获取样品近红外光谱。使用线性判别分析法建立定性分析模型,使用偏最小二乘法建立定量分析模型。结果表明,光谱仪安装高度建议为50～65 mm,输送带速度建议小于300 mm/s。该研究可为近红外光谱法在线定性和定量检测生物质-煤混燃物的方法学研究和相关仪器设计提供参考。
In order to study the influence of conveyer speed and spectrometer installation height on near-infrared on-line detection of straw-coal mixture. In this study, 80 straw samples and 9 coal samples were collected and analyzed. 120 samples of straw-coal mixed fuel with straw mass fraction of 70% -99% (mass fraction increment of 1%) and straw mass fraction of 1 120% (mass fraction increment is 1%) of% ~ 30% straw-coal mixed fuel samples. Samples were taken using a Thermo Fisher Scientific Antaris Target FT-NIR spectrometer at conveyor velocities of 300, 600, 1 000, and 1 400 mm / s, respectively, at a spectrometer mounting height of 50, 56, 59 and 65 mm IR. A linear discriminant analysis method is used to establish the qualitative analysis model and the partial least squares method is used to establish the quantitative analysis model. The results show that the recommended installation height of the spectrometer is 50 ~ 65 mm, and the recommended speed of the conveyor belt is less than 300 mm / s. This study can provide a reference for the qualitative and quantitative detection of biomass-coal mixed-fuel methodologies and related instrumental design by near-infrared spectroscopy.