The utilization of low calorific gas contributes to the energy conservation and environment protection. In order to improve the utilization efficiency, a porous media burner combining the alumina pellets and ceramic foam was established. The effects of the pellets diameter and pore density of ceramic foam on the combustion characteristics were studied, and the burner starting was also investigated to optimize the porous structure. The results showed that the maximum temperature increased first and then decreased with the increasing of pore density, but it decreased with the increasing of pellets diameter with certain conditions. The smaller pore density of the ceramic foam and the larger diameter of the pellets were conducive to the rapid start-up of the burner. Through the combination of ceramic foam and pellets from the radical direction, the flame can propagate quickly to the inside of the burner. As the inlet velocity increased, the flame location moved to the downstream layer. However, the flame location moved to the upstream layer with a higher equivalence ratio.

低热值气体的利用有利于节能环保。为了提高利用效率，建立了氧化铝球团和泡沫陶瓷结合的多孔介质燃烧器。研究了泡沫陶瓷球团直径和孔密度对燃烧特性的影响，并研究了燃烧器的启动，以优化多孔结构。结果表明，在一定条件下，最高温度随着孔密度的增加先升高后降低，但随着球团直径的增加而降低。泡沫陶瓷较小的孔密度和较大的球团直径有利于燃烧器的快速启动。通过陶瓷泡沫和颗粒从根本方向的结合，火焰可以迅速传播到燃烧器内部。随着入口速度的增加，火焰位置​​移动到下游层。然而，火焰位置​​以更高的当量比移动到上游层。