旋流燃烧器颗粒分散特征研究

建立闪速炉旋流燃烧器试验模型,通过冷模试验方法研究旋流燃烧器颗粒分布特征。结果表明,反应塔内颗粒分布受控于风幕风和内旋风射流综合作用,风幕风射流使颗粒集中分布于燃烧器正下方区域,内旋风射流使颗粒远离燃烧器正下方区域分布;同轴多通道射流切向动量矩与按半径加权的轴向动量矩之比M与颗粒质量偏析度p_x和中心区域颗粒质量分数x_1拟合后的无量纲关联式分别为px=5.71e~(-0.262M)-0.34 M、x_1=68.66e!(-0.264M)-4.05 M;p_x与x_1近似线性相关。

Study on Characteristic of Particles Distribution for Swirling Burner

An experimental model of flash furnace with swirling burner was established and particle distribution characteristic was studied with cold experimental method. The results show that particle distribution in reaction tower is controlled by combined action of process air and inner cyclone. Particles are concentrated on central zone under the burner by process air and dispersed away from central zone by inner cyclone. The ratio M, tangential momentum moment to axial momentum moment weighted according to radius in coaxial multi-channel burner, is fitted as the nonlinear function with two characteristic indexes expressed particles distribution uniformity in tower of mass segregation function px and central mass fraction x1 within the scope of experiment data, and the dimensionless correlations are px=5.71e-0.262M-0.34M and x1=68.66e-0.264M-4.05M respectively. There is an approximated linear relationship between px and x1.