Heavy gas leakage diffusion and control study experiment method

Abstract

The invention discloses a heavy gas leakage diffusion and control study experiment method. The method comprises the steps of executing control technologies via orthogonal experiments to obtain key factors influencing properties and influence degrees; performing fine control experiments according to the obtained key factors to confirm a quantitative relation between the key factors and the influence degrees; performing heavy gas leakage diffusion and control experiments via orthogonal experiments to determine key factors influencing the concentration and distribution of heavy gas cloud under different conditions and influence degrees, tracing the direction of mass energy, disclosing a control mechanism, and seeking an acting relation among the control technologies; and establishing a mathematical model according to the obtained acting relation among the control technologies, key factors and influence degrees, and predicting evaporation rates and down-wind LFL (Lower Flame Limit) longest distance under different environmental conditions, leakage conditions and corresponding control technologies. The method has a very good effect on controlling LNG (Liquefied Natural Gas) leakage harm by studying various control technologies.

Description

technical field [0001] The invention relates to the technical field of liquefied natural gas safety, in particular to an experimental method for researching heavy gas leakage diffusion and control. Background technique [0002] Heavy gases such as carbon dioxide and liquefied natural gas (LNG) are widely used for their special purposes and are growing rapidly. However, if this gas leaks, the vapor will spread along the surface, which will cause certain harm and even cause an explosion. Studying the characteristics of heavy gas diffusion and how to control the scope of leakage and diffusion, reduce the harmful consequences, and control the risk of leakage and diffusion have become one of the key issues in ensuring safety. [0003] According to the investigation of the current heavy gas leakage and diffusion research devices at home and abroad, it is found that the research at home and abroad is far from enough in the research of heavy gas leakage and diffusion. The main dom...

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Problems solved by technology

[0005] Chinese patent CN104318623A relates to a simulation display method for leakage and explosion accidents of LNG receiving stations, which mainly solves the problems in the prior art that the influence of complex environmental factors of LNG receiving stations on diffusion explosion is not considered, and strict simulation calculations are not carried out

[0009] (1) The above patents can study the distribution of heavy gas leakage and diffusion gas clouds and the characteristics of explosive combustion under different control methods, but the best control method or combination of control methods cannot be given through experiments

[0010] (2) The above patents are mainly used to study the leakage and diffusion of heavy gas under a single situation, without forming the key factors affecting the leakage and diffusion of heavy gas under different conditions, the degree of influence of factors, and the characteristics and mechanism of heavy gas leakage and diffusion under different control emergency technologies. simulation study

[0011] In short, the above patents are not comprehensive in small-scale experimental research on heavy gas leakage and the control technology adopted.

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