Scenario Construction Of A Heavy Accident In Tank Area

In recent years,chemical safety accidents occur frequently,especially the fire,explosion and other secondary accidents caused by sudden leakage.The tank area is an important part of chemical production enterprises,which is prone to sudden leakage accidents because of the large amount of chemical dangerous goods stored.The impact of sudden leakage accident is wide and dangerous,if the accident is not controlled in time,it will cause serious personnel,environmental pollution and property loss.Therefore,it is urgent for operators and technologists to carry out safety training on the simulation software of the leakage accident in the tank area.This paper mainly focuses on the simulation of disaster simulation of the tank area leakage,and a multi-model disaster model system is established by using the tank area as the research object and meshing of the terminal area.Disaster models include leakage source model,gas diffusion model,liquid diffusion model,pool fire model,heat transfer model and gas-liquid equilibrium model.This paper summarizes the commonly used three kinds of model solving method,the method of calculating the disaster model was given.Under the DSO platform independently developed by Beijing university of chemical technology,Microsoft Visual Studio is used to complete the compilation of relevant modules,and the results are visualized in conjunction with the most advanced virtual reality foundation.At last part of the paper,the accident consequences of leakage in the gasoline tank area are simulated and studied by using the disaster system of preparation and combining with the project background of a petrochemical company.The liquid pool radius varies with the leakage,the effect of leakage rate and wind speed on gas phase diffusion before the fire,and the influence of combustion duration and wind speed on gas phase temperature and gas phase concentration distribution after fire are simulated and studied in the leakage accident.After the finite leakage time of 15min was simulated,the distribution of gas phase concentration in the space and how long it spread could reach the safe concentration.