【作者】 刘育林； 胡刚刚； 徐鸿；

【Author】 LIU Yu-lin;HU Gang-gang;XU Hong;North China Electric Power University;

【机构】 华北电力大学；

【摘要】 循环流化床锅炉在发展过程中出现了极具特色的裤衩腿式结构,解决了锅炉大型化中由于炉膛截面积增大而导致的二次风的射流问题,但两支腿由于流动不一致导致上部物料横向流动过大而经常容易发生"翻床"事故。本文以某台300MW CFB锅炉为研究对象,应用计算流体力学软件FLUENT,对循环流化床锅炉进行了数值模拟,得到了炉膛内部物料速度场和压力场,分析了一次风速和物料厚度时对炉膛内流动的影响,结果表明,较低的床料厚度和一次风速能减少翻床事故的发生。更多还原

【Abstract】 The design of pant-leg structure for CFB boiler is a huge advance in the large-scale process,which causes the "bed overturn" problem led by the difference of material flow in each leg.The Computational Fluid Dynamics(CFD) FLUENT software is employed to investigate numerically the flow in a300 MW circulation fluidized bed boiler.In comparison with a variety of operation condition by changing the velocity of wind and thickness of bed material,finally get some conclusion which can help reduce the opportunity of’’bed overtrun".更多还原