Abstract:

In order to analyze the explosion suppression performance of PVDF porous spherical material on methane-air premix gas in the pipeline, a self-built gas explosion test platform was used to explore the influence mechanism of factors such as filling density and filling method of spherical porous material on the explosion of methane-air premix gas. The results show that compared with air explosion, the explosion overpressure and the ratio of the maximum explosion overpressure in the pipeline are reduced after filling the porous material. The inhibition effect of methane-air is positively correlated with the filling density of the material. When the filling density is 0.077 g/cm³, the inhibition rate of the spherical porous material on the explosion overpressure reaches 54.7%, and the ratio of the maximum explosion overpressure decreases by 58.3%. The different methods of material filling obviously impact the pipe gas explosion overpressure. The dispersed filling method enhances the suppression effect of the porous material on the maximum explosion overpressure. When the filling density is the same, 0.038 5 g/cm³ of material reaches 66% of the suppression efficiency on the maximum explosion overpressure. The inhibition effect of porous materials on methane-air premixed gas explosion will be affected by changing the filling density and filling method.

Key words: polyvinylidene fluoride(PVDF), porous spherical material, explosion suppression performance, explosion overpressure, filling density, filling method