不同泄漏条件下输油管道泄漏事故后果研究

Study on the consequence of oil pipeline leakage accident under different leakage conditions

关键词:  输油管道  池火  流淌火  FERC模型

Key words:  oil pipeline  pool fire  flowing fire  FERC model

摘要:

为了减轻输油管道泄漏燃烧时带来的破坏与损失,基于FERC模型与固体火焰模型对输油管道泄漏后流淌火及池火展开了研究。结果 发现,点火时间的延长及泄漏孔径的增大会加剧油品泄漏区域的发展,从而增强火灾时辐射热流密度的输出强度,扩大危险区域范围。泄漏孔径会改变流淌火中点火时间对辐射热流密度的影响效果。当辐射热流密度为12.5 kW/m²,点火时间为1 000 s与3 600 s时,中孔泄漏危险距离相差12.39 m,而大孔泄漏则为60.86 m。泄漏时间对流淌火的影响受流淌火稳定燃烧时间的限制,而池火则会持续受泄漏时间的影响,危险区域范围不断扩大。在相同泄漏条件下,池火的危害程度远高于流淌火。 

Abstract:

In order to reduce the damage and loss caused by the leakage and combustion of oil gathering pipeline, the flow fire and pool fire after oil pipeline leakage are studied based on FERC model and solid flame model. The results show that the extension of ignition time and the increase of leakage pore size can contribute to the development of oil leakage area, thus enhancing the output intensity of radiation heat flux in fire and expanding the scope of dangerous area. Besides, the effect of ignition time on radiation heat flux in flowing fire will be changed by leakage aperture. When the radiation heat flux is 12.5 kW/m² and the ignition time is 1 000 s and 3 600 s respectively, the dangerous distance difference of the middle hole leakage could reach 12.39 m while that of the large hole leakage is 60.86 m. The influence of the leakage time on the flow fire is limited by the steady burning time of the flow fire, while the pool fire can be continuously affected by the leakage time, leading to the continuous expansion of the danger area. Therefore, the harm degree of pool fire is much higher than that of flowing fire under the same conditions.