煤流化床燃烧过程中大颗粒的碎裂行为(英文)  

Fragmentation Behavior of the Large Particles during Coal Combustion in Fluidized Bed

作　　者：辛建[1] 吕俊复[1] 路霁鸰[1] 刘青[1] 岳光溪[1] 

机构地区：[1]清华大学热能工程系,煤清洁燃烧国家重点实验室,北京100084

出　　处：《应用基础与工程科学学报》2002年第2期182-189,共8页Journal of Basic Science and Engineering

基　　金：aMajorResearchProjectofthetenth FivePlan ( 2 0 0 1 2 0 0 6 )ofChina ( 2 0 0 1 1 3A4 0 1A03)andthenationalkeyfundamentalresearchplan (G1 9990 2 2 2 0 4 )

摘　　要：流化床燃烧中破碎特性影响了焦炭的燃烧 .利用下行气流振动床代替流化床 ,研究了煤的碎裂特性 .根据岩相的不同 ,把大同煤分为亮煤 (C)和暗煤 (D) ,以了解床温、停留时间和振动强度对碎裂特性的影响 .实验结果表明 ,不同煤岩的碎裂不同 ;较高的温度、较长的停留时间、较大的振动强度可以强化碎裂 .The fragmentation influences the char combustion behavior in a fluidized bed combustor. A vibration bed rig with gas down flow was used to investigate the coal fragmentation instead of a fluidized bed. The Datong Bituminous coal was divided into clarain coal (C) and dull coal (D) according to their lithotypes to understand its fragmentation under different bed temperature, resident time, and vibrating frequency and amplitude. The results show that the fragmentation is different for different lithotype. The higher the bed temperature, longer the resident time, and stronger the vibration, the more intensive the fragmentation process is.

关 键 词：流化床 燃烧过程 大颗粒 碎裂行为 振动床 煤 

分 类 号：TQ534[化学工程—煤化学工程] TQ051.