Based On The CFD Numerical Simulation Of Ammonia Leakage Diffusion Research

Ammonia as one of important inorganic chemical products,has a wide range of applications,because of its features is compressed,usually stored in liquid in the tank.Liquid ammonia during production,storage and transportation and so on each link has the possibility of accidental spill,and most of the small and medium enterprises often lack the physical and chemical characteristics of ammonia,ammonia leakage diffusion mechanism,improper disposal for the accident,the resulting vicious failed to effectively control pollution accident,cause unnecessary environment pollution and casualties.Paper on the basis of analysis of liquid ammonia leakage diffusion mechanism,under the condition of limited space on FLUENT ammonia leakage diffusion in numerical simulation of the analysis of three kinds of velocity field and concentration field characteristics under different working condition of ventilation,summed up the ammonia leakage diffusion regularity,that three ventilation mode ammonia leakage diffusion under the limited space of IDLH region,PC-STEL region changes over time,the choice of ventilation for the plant,offer corresponding reference to the layout of the equipment.For open space under the condition of liquid ammonia tank farm,because the liquid ammonia leakage diffusion regularity of heavy gas dispersion model,so using gauss smoke cloud model to simulate the diffusion scope of numerical analysis,it is concluded that different wind speed,surface roughness,atmospheric stability to the influence degree of the gas cloud downwind diffusion range;In the research on the diffusion range,the influence of the factory layout using the FLUENT software for numerical simulation of the research on the diffusion of two different factory layout,reasonable layout for the terminal planning and emergency response to provide the corresponding reference.