局部富氧喷煤直吹管内气-固两相流动及传热数值模拟

Numerical Modeling of Gas-solid Flow and Heat Transfer in Blowpipe of BF Oxy-coal Injection

以气一固两相的动量、热量、物质守衡为基础,用多流体模型描述气体和颗粒两相的运动,用气相湍流模型和颗粒湍流代数模型分别描述气相和颗粒相的湍流特性,建立了高炉局部富氧喷煤直吹管内气-固两相流动及传热的数学模型.数值模拟了9种工况下的气相流场、温度场以及煤粉颗粒相的速度场、浓度场和温度场,并研究了富氧率、风温、固气比、插枪角度等喷吹参数对各种场量的影响.数值模拟结果与实测值符合良好.

A mathematical model of the gas-solid flow and heat transfer in blowpipe of BF oxy-coal injection has been developed by the multi-flow model and turbulence model. Then the velocity and temperature of both gas and pulverized coal as well as its concentration have been calculated in industrial scale blowpipe under different injection conditions. The theoretical predictions are in qualitative agreement with experiments.