Effect of the concentration of Al (OH)_3 ultrafine powder on the pressure of methane explosion
WEN Hu
WANg Qiu-hong
DENG Jun
LUO Zhen-min
Abstract：A trial system of 20 L spherical stainless explosion container was used to investigate the effect of Al(OH)_3 ultrafine powder with different concentration suppressing gas explosion. The experimental results show that with the increase of the concentration of Al( OH)_3 powder, the maximum explosion pressure of methane first decreases then increases, that is, existing the best concentration of powder which can control methane explosion. When the concentration of methane is 9. 5% , the best concentration of Al(OH)_3 ultrafine powder with 1. 3 μm is about 250 g/m~3, the maximum explosion pressure, the rise speed of maximum pressure and the time from collecting pressure to arriving the maximum explosion pressure is 0. 583 Mpa, 9. 082 Mpa/s, 190 ms respectively. When the concentration of methane is 7. 0% , the best concentration is about 200 g/m~3, the maximum explosion pressure, the rise speed of maximum pressure and the time from collecting pressure to arriving the maximum explosion pressure is 0.474 Mpa, 3. 76 Mpa/s, 400 ms respectively.
Keywords：ultrafine powderAl(OH)_3methane explosionexplosion suppression
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1479-1482 )