Numerical Simulation Study on the Venting Characteristics of Dust Collectors Under Dust Explosion Loading

Dust explosion accidents in dust collectors occur frequently in industrial production. Explosion venting is a critical technical measure to mitigate overpressure within dust collectors. Based on the explosion characteristics of coking coal dust, this study employs the DESC simulation tool to numerically investigate the venting dynamics in coking coal dust collectors. The results indicate that as the coking coal dust concentration increases, both the explosion overpressure and flame propagation speed inside the dust collector initially rise and then decline, peaking at 1000 g/m³. Without venting measures, the explosion overpressure in the dust collector is significantly higher than in vented scenarios. The maximum explosion pressure inside the dust collector decreases with an increase in venting area, whereas the maximum explosion overpressure increases as the venting activation pressure decreases.