大跨度厂房气体运移与火灾风险评估研究

he leakage of toxic and harmful gases in large-span plant will cause poisoning, fire, explosion and other problems, which will not only pollute the environment, but also may cause a large number of casualties and property losses. Therefore, we take a natural gas plant as an example, based on Fluent software and SST k-omega turbulence model, to simulate the law of air flow in the plant. The results show that the simulation of SST k-omega turbulence model can effectively simulate the diffusion phenomenon after gas leakage, and at the same time can quickly define the dangerous range of gas leakage and diffusion, so as to bring correct guidance for the emergency relief operation of fire accidents, and thus reduce the property losses of casualty accidents to the greatest extent. At the same time, FRAME risk assessment is used to evaluate the fire risk of large-span factory buildings and other structures, and the relevant factors leading to fire evolution are analyzed in detail, and then relevant fire control policies are suggested from multiple perspectives.