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基于搭建的多孔介质燃烧实验台,研究了相应工况下,二次回热对低浓度瓦斯在多孔介质内燃烧特性的影响。实验表明,壁温可以定性判断火焰位置区间;二次回热可以增大相同当量比下的燃烧速度,扩展了调节范围;二次回热使贫燃极限下探到0.35,说明二次回热有助于扩展泡沫陶瓷燃烧器的燃烧范围;二次回热对污染物排放的改善不太明显,但仍处于较低水平。实验结果为设计低浓度瓦斯燃烧器提供参考数据。
Based on the constructed porous media combustion experiment bench, the effect of secondary recuperation on the combustion characteristics of low concentration gas in porous media under the corresponding operating conditions was studied. Experiments show that the wall temperature can qualitatively determine the location of the flame position; secondary heat recovery can increase the same equivalent ratio of the combustion rate, expanding the adjustment range; secondary heat back to the lean burn limit to 0.35, indicating the second heat helps Expansion of foam ceramic burner combustion range; secondary heat recovery of pollutant emissions is not obvious improvement, but still at a low level. The experimental results provide reference data for designing low concentration gas burner.