The hazard of polyethylene dust during conveying process was analyzed in different aspects. Based on the necessary conditions of polyethylene dust explosion, the analysis method of acceptable safety degree during the process of polyethylene dust conveying was put forward. The method consists of five steps, which is concentration test of hydrocarbon gas, minimum ignition energy test of the polyethylene dust, minimum ignition energy calculation of the hybrid combustible gas and polyethylene dust, comparing the minimum ignition energy of the hybrid and electrostatic discharge and effectiveness assessment on existing safety measures. The method can be also used to assess the hazard of other poly-olefin dust, determine its hazard extent and provide some effective countermeasures, which can solve the poly-olefin dust explosion problem that puzzles the petrochemical industry for many years.

Polyethylene,    ,  Dust,    ,  Explosion,    ,  Electrostatic discharge