冷放空气体扩散对海洋平台群影响分析

Analysis of the Influence of Cold Vent Gas Diffusion on Offshore Platform Group

冷放空系统是海上生产设施不可或缺的安全系统。为评估冷放空管位置改造后对平台群影响程度,运用CFD有限元软件进行冷放空气体扩散分析,结果表明:外界空气流动的介入有效地加强了对可燃气体的稀释;高风速有利于可燃气体的稀释;改造后冷放空口的位置对扩散距离影响不大;W平台冷放空管口在目前位置或上移10m,都不会引起爆炸等安全隐患;当在ESE风向(频率3%)时,冷放空口延长10m后排放气体会扩散至D平台上层甲板。该研究成果可为今后类似冷放空管位置改造及制定应急措施等提供借鉴。

Cold vent system is an indispensable safety system for offshore production facilities.In order to evaluate the influence of the reconstruction of the position of the cooling vent pipes on the platform group,CFD finite element software was used to analyze the diffusion of the cooling vent gas.The result shows that the mix of external air flow effectively strengthens the dilution of combustible gas,and high wind speed is beneficial to the dilution of combustible gas.After modification,the location of the cold vent has little effect on the diffusion distance.No explosion or other safety hazards will be caused whether the cooling vent of platform W moves upward 10 m from the current position or not.With the ESE wind direction(frequency 3%),the exhaust gas will spread to the upper deck of platform D after the cold vent is extended by 10 m.The results of this study provide a reference for the reconstruction of the position of the cold discharge air pipes and the formulation of emergency measures in the future.