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以 4种单一组分、3种混合组分为实验物料 ,研究了射流流化床不同环隙气速下射流深度的变化规律。利用 6支Pitot管组成的电磁阀循环切换装置 ,考察了射流动量的轴向分散。结果表明 ,射流深度随射流气速的增大而增大 ;当射流气速相同时 ,喷口直径增大射流深度增加。射流周围环隙气速由 0变为 2 .5倍最小流化气速时 ,射流深度降低 ;射流周围环隙气速由 2 .5增为 3倍最小流化气速时 ,射流深度不变。提出了预测混合物床层不同环隙气速下射流深度的关系式
Four kinds of single components and three kinds of mixed components were used as experimental materials to study the variation of jet depth under different annular velocity of jet fluidized bed. A solenoid valve cyclic switching device consisting of six Pitot tubes was used to investigate the axial dispersion of jet momentum. The results show that the depth of jet increases with the increase of jet velocity. When the jet velocity is the same, the jet diameter increases and the jet depth increases. When the gas velocity around the jet increases from 0 to 2.5 times the minimum fluidized gas velocity, the jet depth decreases. When the gas velocity around the jet increases from 2.5 to 3 times the minimum fluidized gas velocity, the jet depth remains constant . The relationship between the jet depth at different annulus gas velocities of the mixture bed is proposed