Abstract: Taking a tetrafluoroethylene metering tank leaking and exploding in a polymerization device of a fluorine chemical enterprise as an example, the consequences of tetrafluoroethylene leakage and explosion in the metering tank were studied quantitatively, and the tetrafluoroethylene vapor cloud explosion consequences under 3 scenarios (continuous leakage，instantaneous leakage under different wind speed, and different leakage amounts) were analyzed. Then, the impact of the domino accidents was calculated and the probability of damage to the surrounding tetrafluoroethylene polymerizer, hydrofluoric acid storage tank, and tetrafluoroethylene rectification tower caused by the initial explosion was obtained. The results showed that leakage is the key factor affecting the hazard of a vapor cloud explosion, followed by environmental wind speed. The simulated shock wave overpressure result is smaller since the ALOHA simulation considers factors such as the volume of the explosion source, which is more in line with the actual situation and has more engineering application value compared with the TNT method.

Key words: tetrafluoroethylene, ALOHA, vapor cloud explosion, Domino accidents