化工罐区重质气体多源泄漏扩散实验研究

摘要

This is an experiment research about multi -source leakage and diffusion of heavy gas at tank farm on the simula-tion experiment platform .It is investigated the influence of the position of leakage source in tank farm and the distance between leakage sources on heavy gas leakage and diffusion process when in the multi -source leakage process .The results show that leakage points in tank farm are more closer to the edge ,the range of heavy gas diffusion is larger .More closer leakage points to the center region of the tank farm ,the greater hindering effect of the tank around and the concentration of heavy gas in cen-tral region is higher ;the smaller distance between leakage sources ,the greater the harm to the central region ;the larger dis-tance between leakage sources ,the larger range of gas diffusion ;when the total leakage pressure and volume rates are equal , in a certain range ,the heavy gas concentration at the space point of multi -source leakage and diffusion is basically the same with the sum of heavy gas concentration in corresponding positions of each single source leakage and diffusion .%在模拟实验平台开展了罐区重质气体多源泄漏扩散的实验研究，考察多泄漏源同时泄漏时，泄漏源在罐区的位置、泄漏源间距对罐区重质气体漏扩散过程的影响。结果表明：泄漏源越靠近罐区边缘，重质气体扩散范围越大；泄漏源越靠近罐区中心区域，周围罐的阻碍作用较大，中心区域的重质气体浓度越高；泄漏源间的间距越小，泄漏源中间区域的重气浓度越大，泄漏源间的间距增大，气体扩散范围也增大，事故影响范围越大；泄漏压力、体积速率总和相同时，在一定的距离范围内，多源同时泄漏时空间各点的重质气体浓度与各泄漏源单独泄漏时空间各点重质气体浓度总和基本一致。