Explosion suppression of porous materials in a pipe-connected spherical vessel. (May 2020) - Zhuang, Chunji
Abstract: To study the suppression of different porous materials on the explosion of combustible gas, some experiments were implemented. The porous materials were categorized into three kinds, including six subcategories, and the explosion suppression characteristics of the thin iron hoop, one-layer porous materials, two-layer composite porous materials, and three-layer composite porous materials were studied and analyzed. The results show that a rarefaction wave appears in the spherical vessel during the rapid development stage of combustion explosion. Further, the thin iron hoop could enhance the gas explosion intensity. And the explosion intensity suppression effect of the porous materials is obvious, the best effects of one-layer, two-layer and three-layer porous materials are from Fe–Ni 10 mm/40 PPI, Fe–Ni 10 mm/90 PPI + Al2 O3 10 mm/30 PPI, and Al2 O3 10 mm/50 PPI + Fe–Ni 10 mm/40 PPI + SiC 20 mm/20 PPI, respectively. According to the surface morphology of the porous materials, the anti-sintering ability of the three categories of porous materials follows the order of Al2 O3 > SiC > Fe–Ni. Besides, the thickness and pore size of the combined porous material was changed, which has a great influence on the explosion pressure and the explosion intensity. Highlights: The explosion pressure before the thin iron hoop reduced and lagged, and the explosion pressure after the thin iron hoop increased. The surface morphology of the porous materials was observed after explosion suppression experiment, it was found that the porous materials had the good anti-sintering ability and impact resistance. According to the explosion intensity parameter K and explosion intensity trend, the best explosion intensity suppressive effect of the composite porous material is obtained. The thickness and pore size of the porous material was changed, which has a great influence on the explosion pressure and the explosion intensity.