摘要
循环流化床锅炉的两裤衩腿炉膛之间存在床料存量平衡问题.基于两侧炉膛内物料浓度差引起气体携带颗粒横向流动的假设,建立了裤衩腿炉膛的复合压降模型,应用数值模拟方法对倒料现象进行动态仿真.结果表明:该模型可以预测裤衩腿之间的床料量不平衡现象;不进行主动调节时裤衩腿炉膛内的固体颗粒横向流动是一个正反馈过程,因此可以对两侧炉膛的风烟系统加一个操作,使两裤衩腿炉膛床料维持平衡.
The problem of bed material unbalance between the breeches-legs in the circulating fluidized bed （CFB） boiler is founded during the operation. Based on the assumption that the transverse flow is caused by the solid density difference between the legs, a compound pressure drop model for the furnace with breeches-legs is suggested for the dynamic simulation of the material-returning phenomenon by use of numerical simulation. The result indicates that the model can predict the unbalance phenomenon. If no initiative control is done, the transverse flow of the solid particles in the furnace with breeches-legs is a positive feedback process. Thus additional negative feedback control is necessary to keep balance of the bed materials between the legs.
出处
《动力工程》
EI
CSCD
北大核心
2008年第1期28-32,共5页
Power Engineering
基金
国家重点基础研究发展规划资助项目(G1999022204)
关键词
能源与动力工程
循环流化床锅炉
裤衩腿
床料量
不平衡
数值模拟
energy and power engineering
circulating fluidized bed boiler
breeches-leg
bed material
unbalance
numerieal simulation
作者简介
李金晶（1983-），男，贵州遵义人，博士研究生，从事循环流化床锅炉数值模拟与仿真研究．电话（Tel．）；010—62794129，13810091093；E-mail：lijinjingoo@mails．tsinghua．edu．cn．
