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基于欧拉-拉格朗日方法,建立水煤浆气化炉冷却管内合成气与熔渣颗粒流动、传热的相间耦合数学模型。采用O’Rourke方法处理熔渣碰撞聚并,采用离散坐标法模拟熔渣颗粒辐射传热。根据所建立的模型,对冷却管内合成气温度场进行了数值计算,与相关实验数据结果吻合较好。研究结果表明,由于熔渣的存在,使冷却管出口的温度提高;入口渣气比增大,一方面增强了整体辐射换热能力而强化辐射换热,另一方面提高了入口的总能而增大冷却管热负荷;熔渣在冷却管上半段内聚并现象显著,而下半段基本不发生聚并。
Based on the Eulerian-Lagrangian method, a mathematic model of interphase coupling between syngas and slag particles in a CWS cooling pipe was established. The O’Rourke method was used to deal with the collision and aggregation of slag, and the discrete coordinate method was used to simulate the radiation heat transfer of the slag particles. According to the established model, the temperature field of the synthesis gas in the cooling pipe is numerically calculated, which is in good agreement with the relevant experimental data. The results show that the temperature at the exit of the cooling pipe is increased due to the presence of slag. The increase of inlet slag ratio enhances the overall radiation heat transfer capacity and enhances the radiation heat transfer, and on the other hand increases the total energy of the inlet Increase the heat pipe cooling load; slag cohesion in the first half of the cooling tube and the phenomenon is significant, and the second half of the basic aggregation does not occur.