摘要
为研究含硫气输送管道全管径断裂后的失效影响,提出管道泄漏后硫化氢扩散浓度的计算方法。将管道泄漏过程等效为多个瞬时泄漏气团等时间间隔的连续释放,考虑管道压力变化、风速对泄漏气团的质量、喷射高度的影响,基于高斯烟团模型,对泄漏气团扩散过程中变化的气体浓度进行叠加计算,建立任意时刻沿下风向硫化氢体积分数分布的计算方法。根据输气管道泄漏扩散规律,确定大气扩散参数、各气团质量和喷射高度等基本参数,并以含硫体积分数为10%的输气管进行实例计算。结果表明:地面空气中的硫化氢体积分数在管道泄漏后沿下风向先增大后减小,影响范围不断向下风向延伸;且管径、压力越大,硫化氢在地面的影响范围越广。
The paper was aimed at establishing a calculation method of sour gas＇ s release and dispersion from a pipeline in order that a sour pipeline＇s full diameter fracture effect can be estimated. The leakage process of pipeline was treated equivalently as multiple puff discharging from the pipe continuously in equal time steps. Using Gauss puff model to calculate a single puff＇s dispersion process,considering the effect of pipeline pressure decrease and wind speed on the leakage mass and release jet height,can be estimated calculation model was built through the superposition of multiple puffs. the puff mass,dispersion parameters,release jet height and other parameters were reasonably determined. Finally,according to the hydrogen sulfide volume fraction of 10%,the hydrogen sulfide volume fractions in the air were calculated as a function of both position and time. The results show that after the leakage,hydrogen sulfide volume fraction in the air increases first,then decreases,and that the affected area will expand with the diameter and pressure,accordingly.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2016年第5期118-123,共6页
China Safety Science Journal
关键词
含硫输气管道
扩散
全管径断裂
硫化氢
高斯烟团模型
sour pipeline
dispersion
full diameter fracture
hydrogen sulfide
Gauss puff model
