气化炉激冷室结构优化及数值模拟

Structural Optimization and Numerical Simulation of Gasifier Chilling Chamber

为改善气化炉内合成气带液现象,对气化炉激冷室结构进行了优化改进,将激冷室下降管出口由竖直筒体结构改为喇叭形外扩结构,并在下降管外壁与激冷室内壁之间增设破泡器。采用Fluent软件在冷态工况下对激冷室内流动情况进行数值仿真模拟,研究外扩结构开口角度和破泡器对激冷室内气液两相流动状态的影响。结果表明,随着外扩结构开口角度的增大,合成气带液现象不断得到改善;增设破泡器的激冷室上部气泡比无破泡器激冷室的明显减少,破泡器破泡效果显著。

In order to improve the phenomenon of liquid entrainment in the syngas in the gasifier,the structure of the chilling chamber of the gasifier was optimized and improved.The outlet of the descending pipe of the chilling chamber was changed from a vertical cylinder structure to flared structure and a bubble breaker was added between the outer wall and the inner wallof the chilling chamber.The Fluent software was used to simulate the flow in the chilling chamber under cold conditions,and the effects of the opening angle of the expanded structure and the bubble breaker on the gas-liquid two-phase flow in the chilling chamber were studied.The results show that with the increase of the opening angle of the external expansion structure,the phenomenon of liquid entrainment in the syngas is continuously improved,the bubbles in the upper part of the chilling chamber with a bubble breaker are significantly reduced compared with those without a bubble breaker,and the bubble breaking effect of the bubble breaker is obviously.