(511a) Effect of Parameters on Sweet Potato Dust Explosion

Explosion experiments of sweet potato dust were conducted in a 20 L spherical explosion test apparatus to study the effects of four single factors (particle size, dust concentration, ignition energy and ignition delay time) on explosion characteristics. Furthermore, a four-factor-three-level Box-Behnken design consisting of 29 experiments was conducted to analyze the degree of influence of the four factors on explosion. The results showed that the maximum explosion pressure and explosion index of sweet potato dust increased with the increase in ignition energy, but the explosion parameters decreased as the dust particle size increased. Moreover, the effects of ignition delay time and dust concentration on dust explosion displayed a trend of initial increase followed by decrease. The optimal ignition delay time was found to be 80 ms and the explosion was most sensitive to a dust concentration of 1200 g/m³. Furthermore, it was found that the degree of influence of the four factors on dust explosion followed the order of: dust concentration>ignition energy>particle size>ignition delay time.