切圆燃烧反切风风量与位置对炉内流场的影响  

Fired Boiler Furnace with Changing the Flow Rat and Location of Opposing Tangential Circle of Air

作　　者：窦文宇[1] 廖晓炜[1] 郭元亮[1] 周屈兰[2] 惠世恩[2] 徐通模[2] 

机构地区：[1]中国特种设备检测研究院,北京100013 [2]西安交通大学,陕西710049

出　　处：《中国特种设备安全》2009年第3期10-15,共6页China Special Equipment Safety

摘　　要：本文采用数值分析技术对大容量切圆燃烧锅炉改变燃烧器二次风反切风量以及反切风位置时的炉内流场特性进行了全三维模拟和研究,研究结果表明在燃烧器上部二次风采用反切布置的情况下,无量纲数XJ在1左右时炉膛出口残余旋转较小,炉内气流湍动混合较好,炉内气流运动稳定;研究亦表明反切风位置对炉内流场影响较大。同时,对7个电厂13台大型锅炉进行了改造效果统计,验证了数值分析的结论。In this thesis, 3D numerical simulation is carried out to investigate the flow characteristics in the large tangentially fired boiler furnace with changing the flow rate and location of opposing tangential circle of air. The simulation results show that the residual swirl can be effectively weakened, the turbulent intensity in furnace is great and the flow is stable when XJ is about 1.0 with using opposing tangential circle of second air on upper burners. The simulation results also show that the location of opposing tangential circle of air influences the flow field in the furnace greatly. The practical verification is performed directing thirteen large tangentially fired boilers of seven power plants, the result is in accord with the conclusion of the numerical simulation.

关 键 词：切圆燃烧锅炉 烟气偏差 数值分析 反切 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程] TM621.2[电气工程—电力系统及自动化]