Research On Numerical Simulation Of Typical Fire Accidents In Petrochemical Industry

Due to the particularity of petrochemical industry, fire and explosion accidents are easily happened. In various types of disasters and accidents, fire accident occupies a considerable proportion. Fire mainly by leakage of flammable liquids and gases encountered after the occurrence of ignition sources caused by burning, these took place in an open environment could be devastating fires, cause casualties and property losses. Relative to the bombings and gas leak, flammable liquids and gases direct damage range is not big fire. But the flame direct contact with equipment and tank surface, and thermal radiation of adjacent equipment and container influence make accidents range and extent of damage to upgrade. According to petrochemical fires burning characteristics, this paper adopts computer numerical simulation technology to typical pool fire and jet fire numerical simulation.Based on the present research situation and development of the current pool fire and jet fire both at home and abroad, comparison and analysis of the existing pool fire and jet fire on theoretical model, contrast analysis of various experience model applicable scope, describe pool fire and jet fire burning characteristics and damage model. A series of governing equations describing the process of pool fire are formulated by elemental rule of chemical fluid mechanics, and radiation models are selected according to appropriate conditions. Physical model is established and rational assumption is made to determine preliminary and boundary conditions. Using CFD technology simulating open environment medium-large liquid pools the pool fire and high pressure occurred caused pipeline gas leakage of jet fire caused accident type. Among them, are researched for pool fire with no-wind, often wind and change wind, three working conditions of wind simulation study; The fire in natural wind to jet fire that under the influence of the external influence factors on different simulation research of pressure pipeline. Analysis the simulation results obtained under two kinds of disasters form flame shape, the flame temperature and flow and thermal radiation change tendency. On this basis, discusses the distribution law and fire radiation effects of different factors on it. According to the research results of petrochemical industry, the reasonable design and layout device, prediction, prevent and control the fire accident and emergency rescue measures under fire scenario, and reduce the formulation of fire, explosion, etc accident casualties and property losses provide guidance. It has important economic and realistic significance to ensure the safety of petrochemical industry production and maintain social stability.