利用双流体模型研究不同煤种对煤气化激冷过程的影响

Two-Fluid Model for Quench Chamber of Coal Gasifier

利用双流体模型 ,对气化炉激冷室下降管内的合成气和灰份传热与流动进行了数值计算 ,分析了不同煤种———黄陵煤和华亭煤对气化炉下降管性能的影响 ,并和生产数据进行了比较 .研究表明 ,采用激冷流程的德士古气化炉更适合灰份质量分数较低的煤种 .计算结果也表明 ,煤的灰份不利于合成气在下降管内的冷却降温 .由于灰份的存在 ,使合成气在下降管的出口温度提高了 ,显示出灰份浓度越高 。

A two fluid model is used to simulate the flow and heat transfer of vertical pipe in quench chamber. Calculated are the synthetic gas, ash heat transfer and flow in vertical pipe of coal gasifier. The influence of different ash concentration of coal shows that the cooling of synthetic gas is affected by the ash concentration. The gas temperature can be improved by increasing the ash concentration while low ash concentration coal is more suitable for coal gasifier.