立式稀土氟化炉温度场研究及其参数优化

摘要

In order to solve the problem of the poor fluorination rate caused by uneven temperature in current fixed bed rare earth fluoride furnace. A mathmatical model of new vertical furnace was established by reasonable simplication. The temperature distribution in the fixed bed reactor was obtained by using CFD software. Discussion was made on the main factors of uneven temperature combined with heat transfer theory, namely inlet diameter and material thickness.Making an optimized analysis to vertical rare earth of soil fluoride furnace reactor by single factor analysis, researching law of temperature with diameter and thickness,and thus getting the best size and thickness.An optimized model was established and solved, and the temperature field was much better than before.%为解决现行固定床稀土氟化炉内因温度分布不均而导致的氟化效果不佳问题,以新型立式氟化炉为研究对象,通过合理简化建立数学物理模型,采用CFD软件对模型进行计算分析,得到了不均匀的反应器温度场;结合传热理论讨论了导致温度场不均匀的主要因素,主要有气体入口直径和物料层厚度.采用单因素分析法对立式稀土氟化炉反应器进行优化分析,研究了反应器内温度场随气体入口直径与物料层厚度的变化规律,并获得最佳入口直径和物料层厚度值.根据优化结果建立几何模型并模拟计算,温度场较优化前有较大改善.