液排渣粉煤燃烧器空气动力特性的试验

对液排渣粉煤燃烧器内气流运动规律和混合过程进行了冷态模拟研究,分析了结构参数和动力参数对流动的影响。试验表明:燃烧室轴向速度可分成6个不同的的区域,存在4个回流区;简单环形挡渣板也能产生环形回流区,在旋风燃烧室设计中可取代锥形缩口挡渣板。最佳参数为:1次风旋流数S₁为1.78~2.0;1次风口和2次风口距离L₁₂=(0.75~1.15)D;一次风量为15%~20%。

Experiment Research on Aerodynamics of the Entrained Slagging Pulverized Coal Combustor

An new type of entrained slagging pulverized coal combustor is developed based on cold state model experiment, the velocity distribution and mixing process in the combustor are researched. The results of the experiments show that for the axial velocity distribution, 6 different zones can be found, 4 of which are reverse flow zones. Annular reverse flow zone can be found too in the combustor with the flat-straight slag baffle. The flat-straight slag baffle can replace the cone-convergent one in the design of cyclone combustor. The optimum parameters are that the swirl number of primary air is 1.78 to 2.0, the ratio of primary air is 15% to 20%, the distance between primary air inlet and the secondary one is (0.75-1.15)D.