移动颗粒层过滤除尘的数值模拟及实验对比  

Numerical Simulation and Experimental Contrast of the Dust Filtration of a Moving Granule Bed

作　　者：袁竹林[1] 许世森[2] 

机构地区：[1]东南大学洁净煤发电及燃烧技术教育部重点实验室,江苏南京210096 [2]国家电力公司热工研究院,陕西西安710032

出　　处：《热能动力工程》2002年第1期62-64,72,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究专项经费基金资助项目 (G19990 2 2 10 4-4 )

摘　　要：采用离散颗粒运动数学模型 ,对移动颗粒层过滤除尘器中粉尘颗粒与过滤介质颗粒碰撞以及对除尘效率的影响进行了初步研究。模拟计算了碰撞次数与系统风速之间的变化关系。与实验结果对比发现 ,随系统风速的变化 ,颗粒碰撞频次与除尘效率之间存在定性的一致。研究结果表明颗粒间碰撞作用对移动颗粒层除尘性能起着重要作用。With the use of a mathematical model featuring discrete particle movement a preliminary study was conducted of the collision of dust particles in the dust filter of a moving granule bed with filter media particles and its effect on the dust removal efficiency. The variation relationship of the number of times of collision with the system air speed was simulated and calculated. After comparison with the experimental results it has been found that with the change in the system air speed there exists a qualitative agreement between the particle collision frequency and the dust removal efficiency. The study results show that the action of collision between particles plays a major role in influencing the dust removal performance of the moving granule bed.

关 键 词：离散颗粒 数值模拟 过滤除尘 移动颗粒层 实验对比 燃烧系统 燃汽轮机 发电厂 

分 类 号：TM621.2[电气工程—电力系统及自动化]