气流床气化炉激冷环冷态流场数值模拟

Numerical simulation of cold flow field in quench ring of entrained-bed gasifier

针对气流床气化炉激冷室的工作特点,建立了一套激冷室激冷环的冷态流动数学模型,利用Fluent软件,对激冷环气相冷态流场进行数值模拟。通过模拟与实验对比,分析激冷环上不同位置喷嘴的流场分布;通过改变激冷环的进气方式,分析不同进气结构对激冷环上喷嘴速度的影响。结果表明:相比二进气道结构,四进气道结构使得激冷环喷嘴的速度分布相对均匀,能够达到激冷环对合成气强化换热的效果。

Based on the working principle of quench chamber of entrained flow gasifier,a quench chamber quench ring of cold flow mathematical model is established. Numerically simulated the cold flow field in quench ring with Fluent software. According to the comparison between simulation results and experimental ones, analyzed the flow field distribution in different locations of quench ring. Analyzed the influence of different intake structures on quench ring nozzle speed by changing ventilation methods. The results show that, compared with second inlet structure, the four inlet structure can effectively distribute the quench ring nozzle velocity, which can strengthen the heat transfer efficiency of synthetic gas.