摘 要：运用数值模拟的方法，通过求解非线性联立的质量、动量、能量及组分守恒偏微分方程组，借助多物理场祸合软件Comsol和模拟软件FLUENT模拟出竖式炉内气体流动，换热特性以及料层阻力特性。模拟结果表明：冷却段高度是影响竖式炉内气固流动换热的因素之一，高度增加，烧结矿温度降低，冷却风的温度升高，空气出口携带火用值先增加后趋于平缓，气固比也影响着竖式炉内气体流动和换热，气固比增加，烧结矿的出口温度和循环空气的平均出口温度逐渐降低，热空气携带的火用值先增加后减小；竖式炉直径也是影响因素之一，但相比于冷却高度和气固比影响不是很大。由模拟的结果给出的冷却段高度为7 m，气固比1 400 m3/t，竖式炉直径12 m时，竖式炉炉内的气固换热最强，与现场实际的结构参数和操作参数比较吻合。

Abstract:The resistance characteristics of the inner layer of the vertical tank and the heat transfer of the solid flow are the key factors in determining whether or not the heat balance of the burning tank can be recovered.In this paper,the numerical simulation is performed by solving the nonlinear simultaneous group of energy and mass and momentum conservation and the partial differential equations,and using the multiphysics coupling software Comsol to simulate the gas flow in the vertical tank,heat transfer and material layer resistance characteristics.Simulation results show that the vertical tank height is one of the factors affecting the heat transfer of gas-solid flow in a vertical tank.When the height increases,the sinter temperature decreases and the cooling air temperature rises,and the air carrying capacity increases first before it is flattened out.Air solid ratio,that is,the air volume,also affects the gassolid flow and heat transfer in the vertical tank.With the increase of the gas solid ratio,the outlet temperature of the sinter and the average outlet temperature of the circulating air gradually decrease,and the exergy of the hot air will increase first and then decrease.The diameter of the vertical tank is also one of the factors,but the effect is not significant compared to the height and the gas to solid ratio.The simulation results show that with the height of the vertical tank at 7 m the ratio of gas to solid at 1 400 m3/t,and the tank diameter at 12 m,the heat transfer reaches the maximum.This is in agreement with the actual structural parameters and operating parameters.