The Numerical Simulation Of Coal Gas Leakage And Dispersion In Industrial Place

China's economy has been developing rapidly ever since its entering into the WTO, which in return spurs industrialization in our country. Trades in such areas as chemical industry, metallurgy, machine-building, etc. increase sharply and demands for industrial coal gas and relevant products increases correspondingly. Due to its cheap price, Coal gas has extensive applications in industrial areas. The coal gas has a bigger risk to have a leakage accident in the process of producing, transporting, using which will lead to personnel and property injuries and deaths. There were many accidents of the coal gas leakage happened Between 2005 and 2006 in our country ,Capital Iron and Steel Co. had two great accidents to leak the coal gas in dynamics factory in 8 months especially, which lead to serious consequence that 11 people death and many people severely injury, alarm was sounded. So it has a significance to simulate the leakage accident of coal gas.Firstly, this paper has analyzed both the toxic area that the coal gas causes and the dangerous area of the fire explosion after the leakage in industrial places, and also confirmed the division of the dangerous area of toxicity. Then chooses a suitable gas dispersion model to quantitatively analyzed the possible consequences of coal gas dispersion when the leakage gets out of control, so as to grasp the law that The distribution situation of density after the coal gas leakage ,the changing of dispersion over time, the relevant factors affects dispersion of coal gas and the influence that the coal gas exerts to people, etc. Finally, the dissertation carries on the analysis of numerical simulation based on the data on-site coal gas leakage in methanol project of Jiantao Chemical Industry Co. Ltd.This dissertation gives enterprises some guidelines on the accident of coal gas leakage happens, so they can grasp diffusion range and density that coal gas distributes, ensure safety distance, guide the person in danger how to escape for one's life, avoid being poisoned or suffocated by sucking such gas, reduce injuries and deaths of staff members or residents around caused by the leakage of coal gas in the industrial places.Additionally, the dissertation has also probed into and set up the in the industrial place, which will offer guidance and consulation for enterprises or relevant departments of the government to make emergency rescue plan for the coal gas leakage. Once the accident of coal gas leakage happens, the achievement of this dissertation will be a reference for the security and environmental protection department to consider the consequences, influence, pollution caused by the accident. It also can be an important basis for dealing with the accident and handling the pollution. So there is a realistic meaning from the viewpoint of environmental protection and for the construction of urban security.