混流式流化床冷渣器返料特性的试验研究  

Experimental Study of the Material Return Characteristics of a Mixed-flow Type Fluidized Bed Slag Cooler

作　　者：赵鹏[1] 卢啸风[1] 曾兵[1] 梅琳[1] 

机构地区：[1]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044

出　　处：《热能动力工程》2011年第4期420-423,492-493,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：在新型混流式流化床冷渣器的半工业冷态试验台上,采取分选仓、冷却仓单独运行的方式,针对分选仓隔墙在900～1100 mm高度下、流化风速在2～6 m/s之间,冷却仓静止床高在400～650 mm下、流化风速在0.1～0.7 m/s之间及分选时间在4～12 min之间变化时分别对细灰返料特性的影响进行了试验研究,并对两仓同时运行时的返料特性进行了试验和分析。结果表明:分选仓在固定隔墙高度下返料量随流化风速线性增加,1 000 mm隔墙高度下、分选风速4 m/s时的返料量约占进料量的20%;冷却仓返料量随静止床高、流化风速、流化时间的增加而增加;两仓在1 000 mm隔墙高度下同时运行,分选仓及冷却仓的流化风速分别为5和0.6 m/s时,返料粒径中80%以上的颗粒小于0.15 mm,基本在外循环灰粒径范围内。On a new type semi-industrial cold state test rig for mixed-flow type fluidized bed slag coolers,experimentally studied was the influence of the fine ash material return characteristics when the partition wall height of the elutriation chamber was 900~1100 mm,fluidized air speed changed in a range of 2~6 m/s,the static bed height of the cooling chamber,400~650 mm,the fluidized air speed,0.1~0.7 m/s and the elutriation time duration changed in 4~12 min.Moreover,the above-mentioned material return characteristics were tested and analyzed when both chambers were in operation simultaneously.It has been found that the material return quantity from the elutriation chamber will linearly increase with an increase of the fluidized air speed at a fixed partition wall height,occupying 20% of the material intaking quantity at a partition wall height of 1 000 mm and an elutriation air speed of 4 m/s,while that of the cooling chamber will increase with an increase of the static bed height,fluidized air speed and fluidization time duration.When both chambers are in operation simultaneously at a partition wall height of 1 000 mm and the fluidization air speeds in both elutriation and cooling chamber are 5 m/s and 0.6 m/s respectively,more than 80% of the particles in the material returned are less than 0.15 mm in diameter,basically in the range of the particle diameters of the ash cycled to the outside.

关 键 词：循环流化床 流化床冷渣器 细颗粒 返料特性 

分 类 号：TK223.2[动力工程及工程热物理—动力机械及工程]