组合型多孔材料对容器管道系统内甲烷/空气的抑爆效果

The combinations which were structured from three categories of porous materials including six sub-categories, were tested for studying the suppression effects of the porous materials on the explosion of the combustible gas. The combustible gas was the methane-air mixture. The porous materials were fixed in a closed container piping system by using a self-made thin iron hoop, then the explosion suppression effects of a thin iron hoop, single-layer porous materials, double-layer combination porous materials and three-layer combination porous materials were compared. The results show that the thin iron hoop could enhance the gas explosive intensity and the maximum explosion pressure was achieved behind the iron hoop. The explosion suppression effects of the porous materials were obvious, and the explosion suppression effects of the double-layer combination porous materials were more stable compared to those of the single-type porous materials and the three-layer combination porous materials. The optimized combination of the porous materials for explosion suppression turned out to be Al₂O₃ 10 mm/30 PPI+SiC 20 mm/20 PPI, and the optimized combination of the porous materials for explosion pressure suppression turned out to be Al₂O₃ 10 mm/30 PPI+Fe-Ni 10 mm/90 PPI+SiC 20 mm/10 PPI.