二氯丙烷储罐全面积池火灾的FDS模拟

FDS Simulation of the Whole-area Pool Fire in Dichloropropane Tank Area

以某化工企业在役使用的二氯丙烷罐区为例,采用火灾模拟软件FDS对二氯丙烷储罐罐内池火灾场景下的全面积池火灾事故进行数值模拟,得出了池火灾燃烧过程中火焰以及火焰中心热辐射强度的变化规律,池火灾初期火焰较小,呈薄饼状,随着反应的进行,火焰明显增大,影响范围也迅速加大,随着燃烧过程进入稳定阶段,火焰的大小及形状基本不变,维持在相对稳定的状态;火焰中心热辐射强度随燃烧时间的增大而增强,最高值达100 kW/m2,最终火焰表面的热辐射强度随着燃烧过程趋于稳定而下降并维持在50 kW/m2左右.

The dichloropropane tank area in a chemical company in service was taken for an ex- ample, and the fire simulation software FDS was adopted to make numerical simulation for the whole- area pool fire accident. The variation of flame and the thermal radiation of the flame center in the com- bustion process of pool fire is obtained from the simulation. For the flame, in the early pool fire, the flame is small and pancake-like, and as the reaction progresses, the flame is significantly increasing, the influence sphere is also rapidly increasing, and ultimately with the combustion process into a stable stage, the size and shape of the flame basically remains unchanged and maintains in a relatively steady state. For the thermal radiation of the flame center, it is enhanced as the burning time goes on with the maximum value of 100 kW/m2. Finally, the thermal radiation intensity on the surface of the flame de- creases and maintains at about 50 kW/m2 when the combustion process is stabilized.