摘要
对300MW循环流化床锅炉(circulating fluidized bed,CFB)高温分离器入口长烟道和短烟道内的气固流动特性进行了试验研究及数值模拟。应用高速摄影机,拍摄了示踪粒子在2种结构的入口烟道中的运动轨迹,并进行了示踪粒子运动轨迹的数值模拟。通过示踪粒子的轨迹分析,得到不同结构的分离器入口烟道对固体颗粒的加速性能。分析结果表明,长烟道内颗粒速度的增幅性能比短烟道内颗粒的增幅性能好,但前者压降比后者要大。相同工况下,配长烟道的分离器的分离效率要高于配短烟道的分离器的分离效率,但前者的压降要高于后者。
Gas solid flow characteristics in separator inlet flue duct of 300 MW circulating fluidized bed （CFB） boiler were studied by experiment and numerical simulation. The motion trajectories of tracer particles in the two kinds of separator inlet flue ducts were photographed by high-speed camera and were simulated by computer. By the analysis on the motion trajectories of tracer particles, acceleration performance of particle phase in the two inlet flue ducts was obtained. Analysis results indicate that, velocity enhancement performance of particles in long inlet flue duct is better than that in short inlet flue duct, but the pressure drop of long inlet flue duct is higher. Meanwhile, under the same operating conditions, the efficiency of the separator connected with long inlet flue duct is higher than that with short inlet flue duct, but pressure drop of the separator connected with long flue inlet duct is higher.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2009年第32期6-11,共6页
Proceedings of the CSEE
基金
国家"十一五"科技支撑计划项目(2006BAA03B02-06)~~
关键词
分离器入口烟道
气固流动特性
颗粒速度增幅
压降
分离器性能
separator inlet flue duct
gas solid flow characteristics
velocity enhancement of particles
pressure drop
separator performance
