F风下倾对W型炉内燃烧及NOx排放的影响  

EFFECTS OF DECLINATION OF F SECONDARY AIR ON COAL COMBUSTION AND NO_x EMISSION IN AN ARCH FIRED FURNACE

作　　者：汪华剑[1] 方庆艳[1] 姚斌[1] 雷霖[2] 段学农[2] 赵云辉 汪毅刚 周怀春[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [2]湖南省电力公司试验研究院,湖南长沙410007 [3]大唐华银分公司株洲电厂,湖南株洲412005

出　　处：《工程热物理学报》2009年第6期1055-1058,共4页Journal of Engineering Thermophysics

基　　金：国家863专题课题(No.2006AA05Z301);国家自然科学基金资助项目(No.50721005)

摘　　要：本文通过数值模拟和在实际锅炉上的试验,研究了310 MW Foster Wheeler技术W型火焰锅炉F层二次风下倾15°对炉内燃烧过程的影响。通过对模拟和试验的分析表明,F层二次风下倾后对炉内燃烧的影响主要表现在火焰行程延长,煤粉停留时间增加,还原区扩大,一次风与二次风的混合推迟等方面。试验和模拟结果都表明,F层二次风下倾后锅炉的火焰中心下降,飞灰含碳量降低,锅炉效率提高且NO_x排放明显减少。The work studies the effects of declination of F secondary air with the angle of 15 degree on coal combustion and NOx emission in an 310 MW arch fired furnace by numerical simulation and field tests. The simulation results are verified by field experiments and it shows that F secondary air declination prolongs the flame path of primary coal/air flows, extends the reduction zones, increases the residence time of coal particles in the flame, and delays the mixing of primary air with the secondary air. The simulation and the experiments both demonstrate that declination of F secondary air makes the flame center moved down, unburnt carbon content decreased, and the combustion efficiency increased with NOx emission decreased at the same time.

关 键 词：W型火焰锅炉 F层二次风下倾 煤粉燃烧 提高效率 降低NOx 

分 类 号：TK16[动力工程及工程热物理—热能工程]