液氯储罐瞬时泄漏扩散质量浓度分布规律与中毒后果评价

发布时间：2018-09-10 10:11

【摘要】：液氯储罐一旦发生泄漏,容易在大气中快速扩散,其扩散速度受到泄漏量、外界风速等条件的影响。为了研究不同风速和泄漏量对氯气扩散规律的影响,分别在泄漏量为2 kg、5 kg,外界风速为2 m/s、5 m/s的条件下,采用Fluent软件模拟了氯气储罐瞬时泄漏后氯气质量浓度随时间的分布规律,并结合氯气的致死浓度,对氯气扩散区域最大质量浓度分布及其毒性致命损伤进行了分析。结果表明,氯气扩散初期,云团浓度较高,重气效应比较明显,随时间增加云团逐渐增大。泄漏量越大,氯气的扩散速度和致死区范围越大,毒性致命损伤时间越短;风速越大,致死区的影响距离越大,但致死区的影响时间大幅度缩短,能有效降低氯气的中毒危害。
[Abstract]:Once the liquid chlorine tank leaks, it is easy to spread rapidly in the atmosphere, and its diffusion velocity is affected by the leakage amount, the external wind speed and so on. In order to study the effect of different wind speed and leakage rate on the diffusion of chlorine gas, under the condition that the leakage rate is 2 kg,5 kg, the external wind speed is 2 m / s / s, The distribution of chlorine concentration with time after the instantaneous leakage of chlorine storage tank was simulated by Fluent software. Combined with the lethal concentration of chlorine gas, the distribution of maximum mass concentration in chlorine diffusion region and its toxic fatal damage were analyzed. The results show that in the early stage of chlorine diffusion, the cloud concentration is higher, the effect of heavy gas is obvious, and the cloud gradually increases with the increase of time. The larger the leakage, the larger the diffusion speed and the range of lethal zone of chlorine gas, and the shorter the time of lethal injury, the greater the wind speed, the greater the influence distance of lethal zone, but the shorter the influence time of lethal zone, which can effectively reduce the poisoning hazard of chlorine gas.
【作者单位】：重庆科技学院安全工程学院;重庆市安全生产科学研究院;
【基金】：国家自然科学基金项目(91024031) 重庆市教委科学技术研究项目(KJ1501313)
【分类号】：X928.5

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