非溶解性危险化学品在内河中的泄漏扩散规律

Leakage and diffusion rule of insoluble dangerous chemicals in inland rivers

为研究内陆河流运输中危险化学品(危化品)泄漏后的扩散规律,建立了一种数值模拟方法,利用地图软件获得地理信息,建立对应模型后进行数学计算。以长江南京段八卦洲北汊为例,模拟3000 t级非溶解性危化品运输船舶的泄漏扩散过程,分析不同时刻危化品泄漏扩散的形态变化。模拟结果表明,泄漏后27.5 min时,泄漏团数量超过40个,最大泄漏团面积接近1800 m2,次生事故风险显著增加。

In order to study the diffusion rule of dangerous chemicals leaked in inland river,a numerical simulation method was established by using map software to obtain geographic information to establish corresponding model and then performing mathematical calculations.Taking the north branch of Baguazhou in Nanjing section of the Yangtze River as an example,the leakage and diffusion process of insoluble dangerous chemicals in a 3000 t class transport ship is simulated,and the morphological changes of the leakage and diffusion of dangerous chemicals at different times are analyzed.The simulation results show that 27.5 min after the leak,the number of leakage areas exceede 40,the largest leakage area is close to 1800 m2,and the risk of secondary accidents increases significantly.