220t/h循环流化床锅炉布风板风帽的数值模拟及改造  

Numerical simulation and reconstruction of air caps for 220t/h circulating fluidized bed

作　　者：宋长志 李瑞宇 李树学 鲍俊涛 SONG Chang-zhi;LI Rui-yu;LI Shu-xu

机构地区：[1]广东省特种设备检测研究院,广东佛山528251

出　　处：《节能》2018年第1期75-79,共5页Energy Conservation

基　　金：广东省质量技术监督局科技项目(项目编号:2015ZT02)

摘　　要：某自备电厂的220t/h循环流化床锅炉由于炉膛内燃烧特性不稳定导致锅炉效率降低,为提高其热效率,采用计算流体力学分析软件Fluent对锅炉布风板风帽进行数值模拟分析,通过改造布风板结构达到合理的燃烧工况,提出并确定新型风帽的改造方案。对比分析了不同工况下2种布风板风帽阻力系数的变化及其自身结构对锅炉燃烧特性的影响。试验结果表明:炉床漏料减少,改造后的布风板风帽风阻减小并能很好的将床料流化,折算后的热效率提高约4%,节省一次能源提高能源的利用率,为我国节能减排工作做出重要贡献。For Guangdong Province self-owned power plant 220T/h circulating fluidized bed boiler furnace,instable combustion characteristic leads to inefficiency.Analysis software of Fluent was adopted for numerically analyzing the boiler air distributing plate numerical simulation analysis of fluid mechanics to improve the thermal efficiency of the calculation.The reasonable combustion condition was reached through the transformation of air distribution plate structure,and the transformation plan model hood was proposed and determined.Under different conditions of two air caps analyzed resistance coefficient and its effect of structure on combustion characteristics.Results showed that the air distributing plate drag can be decreased after transformation and material flow well,Thermal efficiency increases by about 4%after conversion.It not only saves primary energy,improve energy utilization,but it can make important contributions to China's energy saving and emission reduction work as well.

关 键 词：循环流化床 结构改造 数值模拟 风帽结构 节能减排 热效率 

分 类 号：TK01[动力工程及工程热物理]