煤粉工业锅炉燃烧器和炉膛数值模拟与试验研究  

Numerical Simulation and Experimental Study of Burner and Furnace of Pulverized Coal-fired Industrial Boiler

作　　者：池俊杰[1] 池作和[1] 孙公钢[1] 王进卿[1] 张光学[1] 

机构地区：[1]中国计量学院

出　　处：《电站系统工程》2013年第5期1-4,共4页Power System Engineering

基　　金：浙江省大学生科研创新团队资助项目(2012R409041)

摘　　要：针对煤粉工业锅炉,首先利用Fluent对燃烧器和炉膛进行数值模拟,分别研究变二次风旋流强度和锅炉负荷变化对燃烧特性的影响,结果显示:炉内煤粉燃烧温度随着二次风旋流强度的增大而升高,当二次风旋流强度为2.14时煤粉具有最高的燃尽率;锅炉负荷降至40%时燃烧器依然能维持煤粉在炉内的稳定燃烧,并保证煤粉的燃尽率达到较高水平。随后基于模拟结果,制造了4 t/h的煤粉工业锅炉样机,并对其进行了燃烧试验,结果表明煤粉在炉内能被较好地引燃并稳定燃烧,炉内温度分布较理想,锅炉平均效率达到88.75%,且尾部烟气中NOx、SO2及烟尘排放量均大大低于国家I类地区排放标准。According to the pulverized coal fired industrial boiler, first of all the burner and furnace was carried on the numerical simulation by using Fluent. The numerical simulation was to study the influence on the combustion characteristic by changing the secondary air swirl strength and boiler operation load. Results showed that the burning temperature raised gradually with the secondary air swirl strength increased. The pulverized coal had the highest burning rate when the secondary air swirl strength was 2.14.Meanwhile, the pulverized coal could keep stable combustion in the furnace and the coal burnout rate could reach a high level when the boiler operation load was 40%.Then a 4t/h pulverized coal fired industrial boiler prototype was produced on the basis of the simulation results. Combustion experiment was carried out for it. The test results revealed that the pulverized coal was ignited smoothly and burn stably in the actual operation, and the temperature distribution was ideal. The average thermal efficiency of boiler reached 88.75%. Meanwhile, NOx, SO2 and Soot emissions in the tail flue gas were significantly lower than national I class area emissions standard.

关 键 词：煤粉工业锅炉 燃烧器 炉膛 数值模拟 燃烧试验 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]