循环流化床锅炉选择性排渣装置  

A Selective Bottom Ash Discharging Device for Circulating Fluidized Bed Boilers

作　　者：曾兵[1] 卢啸风[1] 舒陈 甘露[1] 

机构地区：[1]低品位能源利用技术及系统教育部重点实验室(重庆大学),重庆市沙坪坝区400044 [2]东方锅炉股份有限公司技术中心研究所,四川省成都市611731

出　　处：《中国电机工程学报》2012年第17期51-56,143,共6页Proceedings of the CSEE

摘　　要：提出了一种选择性排渣装置,用于实现循环流化床锅炉底渣的选择性排放以及回收底渣中细颗粒以调节炉内床料粒径分布。在一个可视化冷态试验台上对其气固流动特性进行了试验研究,试验结果表明:运行时间、主床和分选室的流化风速以及隔墙高度对分选室的颗粒分选情况有较大影响,可以通过调节分选室和主床的流化风速来调节排渣分选情况;当分选室与主床的流化风速比>1.43时,该排渣装置才会有好的粗细颗粒分选效果。A selective bottom ash discharging device （SBADD） for the circulating fluidized bed （CFB） boiler was developed. The SBADD can be used to achieve the selective discharge on the bottom ash and to return the fine particles back to the furnace to improve the bed material size distribution. Experiments about the gas-solid flow characteristics were conducted in a visible cold test rig. The experimental results show that the operation time, the fluidized velocity and the partition height have important impact on the particle separation of the separation chamber. The particle separation effect can be controlled by the fluidized velocities of the separation chamber and the main bed. Only when the fluidized velocity ratio （~ between the separation chamber and the main bed isξ〉1.43, the SBADD can obtain a good particle separation effect.

关 键 词：循环流化床 排渣装置 气力分选 床料粒径分布 试验研究 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]