苯管线泄漏扩散过程的模拟研究

Simulation study on leakage and dispersion process of benzene from pipeline

石化企业经常发生的中低度污染随着人们对环境的日益重视而得到研究者的关注。本文针对某石化企业苯管线中度泄漏的情况,采用CFD模拟软件分析了泄漏时间及气象因素对苯污染物扩散过程的影响规律。模拟结果表明,苯管线泄漏后在泄漏口附近苯的浓度值较大,随着泄漏时间的增加,高浓度苯扩散范围变大并影响周边的居民区。随着风速的增加,泄漏扩散距离增加,居民区附近苯的浓度增大。大气稳定不利于苯的扩散。

Middle or low-level leakage of chemical materials from chemical factories has been concerned by researchers because the public begin pay more attention to environment protection. Middle-level leakage of benzene from pipeline was studied in this paper to analyze the effects of some key parameters such as leakage time and meteorology on dispersion process of benzene pollutant. The simulation results showed that the concentration of benzene was higher near the leakage position and the dispersion range of benzene began to increase with the increase of leakage time so as to affect the residence community. The dispersion distance and the concentration of benzene increased with the increase of wind speed. Steady atmosphere is adverse to dispersion of benzene pollutant.