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建立了高炉冷却壁三维物理模型。采用大型CFD软件FLUNT6.8中的欧拉多相流模型,对高炉冷却壁冷却水管内的液固两相流三维流动和污垢清洗特性进行了数值模拟研究。分析了流体的流速、固体颗粒的粒径、体积分数对流体的流动、清洗强度及清洗均匀的影响。结果表明:流体的湍流强度、壁面污垢清洗强度和压力降均随流速、颗粒粒径和体积分数的增加而增加;液固流态化清洗防垢除垢效果取决于流速、液固颗粒粒径和体积分数的合理组合;综合考虑节水节能及污垢清洗的均匀性,高炉冷却壁的最佳流速为2.0～2.5 m/s,固相颗粒粒径为3～4 mm,体积分数为5%～8%。研究结果为高炉冷却壁液固流态化污垢在线清洗的工业应用提供了理论基础。
A three-dimensional model of BF stave was established. Numerical simulation was used to simulate the three-dimensional flow and fouling characteristics of liquid-solid two-phase flow in the cooling pipe of blast furnace cooling stave with the Euler multiphase flow model of large-scale CFD software FLUNT6.8. The effects of the flow rate of the fluid, the particle size of the solid particles, the flow of the fluid, the cleaning intensity and the uniformity of the cleaning are analyzed. The results show that the fluid turbulence intensity, wall surface dirt cleaning strength and pressure drop increase with the increase of flow rate, particle size and volume fraction. The effect of liquid-solid fluidization cleaning scale inhibition and scale removal depends on the flow rate, liquid-solid particle size And the volume fraction of a reasonable combination; Considering the water saving and dirt cleaning uniformity, the best blast furnace cooling wall flow rate of 2.0 ~ 2.5 m / s, the solid particle size of 3 ~ 4 mm, the volume fraction of 5% ~ 8%. The results provide a theoretical basis for the industrial application of liquid-solid fouling on-line cleaning of blast furnace cooling stave.