燃气管道泄漏原因及扩散影响因素分析

Analysis of the causes and diffusion influencing factors of gas pipeline leakage

通过燃气管道泄漏原因及燃气泄漏扩散影响因素的分析,针对燃气泄漏事故提出防范措施,对于减少火灾和爆炸事故危害具有重要的意义。本文分别从人为管理和设备设施方面总结了燃气管道系统泄漏的原因,通过建立燃气泄漏数学模型,对泄漏过程采用数值模拟分析的手段,分别从气体泄漏条件、气体种类和外界风场三个方面得出燃气泄漏后浓度场的变化规律,并结合泄漏扩散规律为预防燃气管道泄漏事故提出了消除爆炸必要条件、合理规范燃气设施和加强安全用气宣传等一些有效措施。

Through the analysis of the causes and diffusion influencing factors of gas pipeline leakage, preventive measures aimed at gas leakage accidents are proposed, which is of great significance to re- duce the risk of fire and explosion hazards. This paper summarizes the reasons for the leakage of the gas pipeline system in terms of human management, equipment and facilities. By establishing the mathematical model of gas leakage, by means of numerical simulation analysis of the leakage process, variation of the concentration field after gas leak is derived from the three aspects of gas leak condi- tions, gas species and external wind field. In order to prevent the leakage of gas pipeline, some effec- tive measures are proposed according to the leakage diffusion law, including eliminating necessary conditions of explosion, specifying reasonably gas facilities and strengthening gas safety propaganda.