流化床多晶硅生产车间火灾模拟研究

Simulation on the fire of the fluidized bed polysilicon production

结合某工程实例,采用FLUENT软件对流化床车间生产单元氢气泄漏燃烧、硅烷泄漏燃烧时的火焰温度和热辐射进行模拟分析,确定影响火灾的相关因素,并使用TNT当量法分析可燃气体泄漏后车间的爆炸危险性。结果表明,泄漏孔径对火灾范围影响重大;环境风速能降低硅烷火焰温度;爆炸破坏半径随时间和泄漏孔径的增加呈现非线性增长。

Combined with an engineering example, the flame tern.- perature and heat radiation of hydrogen or silane leakage and com- bustion of fluidized bed workshop production unit were simulated using FLUENT software, to determine the related factors that af- fect the fire. Using the TNT equivalent method the explosion risk after the leakage was analyzed. The results showed that the aper- ture had a great influence on the fire range; the ambient wind speed will reduce the temperature of silane flame; the radius of the explo- sion damage represented a non-linear growth with the increasing of time and leakage diameter.