低浓度煤矿瓦斯气多孔介质超焓燃烧试验研究

Experimental Study on Hyper-enthalpy Combustion of Low Concentration Coal Mine Gas in Porous Media

针对低浓度瓦斯气无法直接燃烧的问题,利用多孔介质超焓燃烧原理设计了低浓度瓦斯氧化系统,探究了不同浓度瓦斯的燃烧特性及污染物排放水平,结果表明:多孔介质超焓燃烧技术拓宽了常温常压下瓦斯的燃烧极限,可实现浓度高于3.5%的瓦斯气安全、稳定燃烧。多孔介质可强化气体的混合及弥散效应,强化燃烧并使燃烧区域温度迅速趋于均匀,避免局部高温,减少CO与NO_(x)生成量。本技术响应了国家“双碳”战略,拥有巨大的经济效益和社会效益。

Aiming at the problem that low-concentration gas cannot be directly combusted,a low-concentration gas oxidation system was designed using the principle of porous media hyper-enthalpy combustion,and the combustion characteristics and pollutant emission levels of different concentrations of gas were explored.The results showed that:porous media hyper-enthalpy combustion The technology broadens the combustion limit of gas under normal temperature and pressure,and can realize safe and stable combustion of gas with a concentration higher than 3.5%.Porous media can strengthen the mixing and dispersion effect of gas,enhance combustion and make the temperature in the combustion area quickly become uniform,avoid local high temperature,and reduce the generation of CO and NO_(x).This technology responds to the national"double carbon"strategy and has huge economic and social benefits.