Real-time monitoring of flue gas parameters in combustion processes is central to the optimization of the process efficiency and reduction of pollutants emission. We report simultaneous measurement of the average water vapor temperature and concentration over a 9 m distance in a full-scale industrial boiler by broadband lidar employing a custom supercontinuum source covering the wavelengths of ro-vibrational absorption of water molecules at 1.2 – 1.55 µm. The measured average temperature and concentration are in excellent agreement with reference measurements. We also take advantage of the backscattering from the aerosol particles present in the boiler to map the water vapor concentration profile in the boiler up to a distance of 2.7 m with a spatial resolution of 30 cm. Our results open novel perspectives for 3D profiling of temperature and gas concentration in industrial environments.

中文翻译：

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用于工业过程分析的超连续谱激光雷达

燃烧过程中烟气参数的实时监测对于优化过程效率和减少污染物排放至关重要。我们报告了使用覆盖 1.2 – 1.55 µm 水分子振动吸收波长的定制超连续谱源的宽带激光雷达同时测量全尺寸工业锅炉中 9 m 距离内的平均水蒸气温度和浓度。测得的平均温度和浓度与参考测量值非常吻合。我们还利用锅炉中存在的气溶胶颗粒的反向散射来绘制锅炉中最远 2.7 m 的水蒸气浓度分布图，空间分辨率为 30 cm。