气固循环流化床负压差下料立管的压力脉动特性  

Characteristics of pressure fluctuation in standpipe at negative pressure gradient in circulating fluidized bed

作　　者：张毅[1] 魏耀东[1] 时铭显[1] 

机构地区：[1]中国石油大学(北京)化学科学与工程学院,北京102249

出　　处：《化工学报》2007年第6期1417-1420,共4页CIESC Journal

基　　金：国家自然科学基金项目(20576074)。~~

摘　　要：The characteristics of pressure fluctuation in a standpipe at negative pressure gradient were investigated based on measurement in the gas-solid two-phase circulating fluidized bed(CFB).When the solid particles flowed downward from low pressure part to high pressure part in the standpipe, the particles compressed the gas entrained by them, which resulted in the instability of gas-solid two-phase flow.This instability was shown as pressure fluctuation, undulating particle velocity and uneven concentration.The range of pressure fluctuation was related to the negative pressure gradient in the standpipe.The characteristics of pressure fluctuation in a standpipe at negative pressure gradient were investigated based on measurement in the gas-solid two-phase circulating fluidized bed （CFB） . When the solid particles flowed downward from low pressure part to high pressure part in the standpipe, the particles compressed the gas entrained by them, which resulted in the instability of gas-solid two-phase flow. This instability was shown as pressure fluctuation, undulating particle velocity and uneven concentration. The range of pressure fluctuation was related to the negative pressure gradient in the standpipe.

关 键 词：循环流化床 负压差 立管 压力脉动 

分 类 号：TQ021[化学工程]