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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。
Once a liquid chlorine tank leaks, it is easy to rapidly diffuse in the atmosphere, and its diffusion rate is affected by the amount of leakage and external wind speed conditions. In order to study the influence of different wind speed and leakage on the diffusion of chlorine, Fluent software was used to simulate the instantaneous chlorine storage tank instantaneous leakage at 2 kg / 5 kg and outside wind speed of 2 m / s and 5 m / s, respectively After the leakage of chlorine concentration distribution over time, combined with the lethal concentration of chlorine, the distribution of the maximum concentration of chlorine gas diffusion region and its toxic lethal damage were analyzed. The results showed that in the early stage of chlorine diffusion, the cloud concentration was higher and the heavy gas effect was more obvious. The cloud volume increased with time. The larger the leakage rate, the larger the diffusion rate and lethal zone of chlorine, the shorter the deadly toxicity. The greater the wind speed, the greater the impact zone of lethal zone, but the time of lethal zone greatly shortened, which can effectively reduce the chlorine Poisoning hazard.