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针对含硫油气田开发生产中,硫化氢(H_2S)在振动筛房等密集作业空间内泄漏扩散造成的潜在人员毒害问题,从确定H_2S扩散规律、建立事故控制措施的角度展开分析。根据海洋平台空间环境特点,采取计算流体动力学(CFD)建立用于分析H_2S扩散过程的理论模型和数值模拟方案。就某海洋平台振动筛房在舱门关闭、打开和房内安装换气机3种条件下的H_2S扩散过程进行分析,确定H_2S浓度变化和分布规律。通过对比不同舱室条件下的H_2S影响程度,推荐在平台生产过程中封闭可能出现H_2S泄漏的舱室并安装换气机。进一步分析了换气机的工作效率,建立了简化数学模型以快速预测换气机工作时间,并与CFD结果进行了验证。
Aiming at the problem of potential personnel poisoning caused by the leak and diffusion of hydrogen sulfide (H 2 S) in dense operation room such as vibrating screen room during the development and production of sulfur-containing oil and gas fields, the paper analyzes the determinations of H 2 S diffusion and the establishment of accident control measures. According to the characteristics of the space environment of the offshore platform, a theoretical model and a numerical simulation scheme for analyzing the H 2 S diffusion process are established by computational fluid dynamics (CFD). The H 2 S diffusion process under the three conditions of closing, opening and installation of ventilator in a marine platform vibrating sieve room was analyzed to determine the variation and distribution of H 2 S concentration. By comparing the influence of H 2 S under different cabin conditions, it is recommended to close the cabin in which H 2 S leakage may occur during the production of the platform and to install the ventilator. The working efficiency of the ventilator is further analyzed, and a simplified mathematical model is established to predict the working time of the ventilator quickly. The CFD results are also validated.