摘要
结合某公司300 MW燃煤UP型直流锅炉低NOx燃烧改造实例,进行了水动力原始偏差测定。同时以70%BMCR作为基准负荷,控制包覆出口压力12 MPa,进水量632 t/h,以50%负荷与30%负荷作为校核试验,并对整个热态启动过程炉内温度状况和水动力情况进行了评述。试验结果表明,低NOx燃烧改造的燃烧系统设计可有效地保护水冷壁,并配合精细的水动力特性调整,使得UP型锅炉的水冷壁安全性大为提高。
Combining with low NOx combustion retrofit of a 300 MW boiler,the hydrodynamic characteristics of water cooled wall tubes was experimentally investigated.70% BMCR was defined as the reference load.The pressure of coating outlet was 12 MPa and water inflow was 632 t/h while 50% and 30% of reference load were used for check analysis.Finally,the temperature in the furnace during the whole process of start and the hydrodynamic characters were measured and analyzed.The results showed that the safety of the water wall was raised due to the well designed low NOx combustion system and the detailed hydrodynamic adjustments.
出处
《能源工程》
2010年第4期18-22,共5页
Energy Engineering
关键词
亚临界锅炉
水冷壁管
水动力特性
BMCR
once-through boiler
water-cooled wall
hydrodynamics characteristics
BMCR
