回转窑预热段温度优化及数值模拟

Temperature Optimization and Numerical Simulation of Preheating Section of Rotary Kiln

为改善回转窑内部温度分布不均的问题,建立了一个基于FLUENT的回转窑预热段三维数值模型,通过正交试验对回转窑主要操作参数进行优化,给出了正常运行工况下回转窑预热段的最佳参数组合方案。结果表明:回转窑进气口高温气体流速3m/s,回转窑转速0.2r/min,回转窑抬起角度2°时,仿真模拟结果为窑内最低温度1092.206K,与窑内最高温度的温差为30.794K,与初始方案相比,窑内最低温度提升了3.35%,温差降低了53.54%,改善了回转窑内温度分布不均的问题。

In order to improve the uneven temperature distribution in the rotary kiln,a three-dimensional numerical model of the preheating section of the rotary kiln based on FLUENT was established.The main operating parameters of the rotary kiln were optimized through orthogonal tests,and the optimal parameter combination scheme of the preheating section of the rotary kiln under normal operating conditions was given.The results show that when the flow rate of high temperature gas at the inlet of the rotary kiln is 3 m/s,the rotating speed of the Rotary kiln is 0.2 r/min,and the lifting angle of the rotary kiln is 2°,the simulation results areas follows:the lowest temperature in the kiln is 1092.206 K,and the temperature difference from the highest temperature in the kiln is 30.794 K.Compared with the initial scheme,the lowest temperature in the kiln is increased by 3.35%,and the temperature difference is reduced by 53.54%,improving the uneven temperature distribution in the rotary kiln.