内循环流化床固体循环速率的研究  

INVESTIGATION OF PARTICLE CIRCULATING RATE IN A LOOP FLUIDIZED BED

作　　者：陈秉辉[1] 戴擎镰[1] 吕德伟[1] 

机构地区：[1]联合化学反应工程研究所浙江大学分所,杭州310027

出　　处：《化学反应工程与工艺》1993年第4期471-476,共6页Chemical Reaction Engineering and Technology

摘　　要：研究一种加料不独立的垂直气力输送装置,并以流化床作为料仓和混合区,两者构成固体循环系统。由于系统特性,加料喷嘴的插入高度与加料结构将会直接影响操作的稳定性,从力的平衡出发导出临界结构为 h_c/D_e<fH_L/R,其中 f 是颗粒特性的函数。在稳定操作条件下,建立循环系统模型并进行模拟计算,计算结果与实验吻合较好。The particle recycling system consists of an independently feeded vertical pneumatic conveyer and a fluidized bed as the mixing zone.The inserting height of the spray nozzle and feeding struc- ture affected the stability of the system directly.A critical structure h_c/D_e<f H_L/R was deduced from force balance. A model of the recycling system was obtained at steady state and the results of calculation by using the model agree with the experimental data fairly well.

关 键 词：内循环 流化床 固体循环 

分 类 号：TQ051.13[化学工程]