Consequence Simulation and Risk Assessment Model of Liquid Ammonia Leakage Accident Based on PHAST Software

In recent years, liquid ammonia leakage has occurred repeatedly all over the country, causing casualties and huge losses to people's lives and property. In this paper, PHAST software is used to simulate the consequences of liquid ammonia leakage accident in all equipment and pipelines in a certain area of a chemical plant under various scenarios, and the lethal rate and diffusion concentration range of liquid ammonia leakage accident in typical scenarios are analyzed. At the same time, based on Gaussian plume model, the damage range of liquid ammonia in different leakage modes of liquid ammonia storage tank is simulated by risk assessment software, and the change law of damage range of liquid ammonia in different modes is obtained, and the influence of wind speed on liquid ammonia diffusion is analyzed. The research conclusion of this paper will also be a reference for safety and environmental protection departments to master the consequences and impacts of such accidents and the environmental pollution caused by them, and also an important basis for solving accident treatment and pollution hazards, which has practical significance from the perspective of environmental protection and industrial safety.