配风方式对600MW“W”型火焰锅炉爆管的影响  

Impact of Air Distribution Mode on Pipe Burst in 600 MW W-flame Boiler

作　　者：曹小玲[1] 李帆[1] 刘永文[2] 苏明[2] 

机构地区：[1]长沙理工大学能源与动力工程学院,长沙市410076 [2]上海交通大学机械与动力工程学院,上海市200030

出　　处：《电力建设》2013年第3期59-63,共5页Electric Power Construction

基　　金：国家自然科学基金(51276023);湖南省高校创新平台基金(09K069);湖南省科技厅计划项目(2011GK3111)

摘　　要：为研究某超临界600MW"W"型火焰锅炉受热面频繁爆管的原因,对锅炉炉内燃烧过程进行了数值模拟,以分析不同配风方式对锅炉受热面爆管的影响。计算结果表明:实际工况下,炉膛中心截面温度场整体上呈"W"型分布,温度场比较对称;当前、后拱上一次风量和内二次风量比为5/6、6/5时,炉内温度场变化不敏感,炉内没有出现高温火焰冲刷受热面;当前、后拱上外二次风量比和前、后墙上分级风为5/6和6/5时,炉内温度场出现偏斜,炉内高温火焰冲刷冷灰斗严重,这可能会导致冷灰斗受热面爆管。In order to study the reason of frequent pipe burst of heating surface in a 600 MW supercritical W-flame boiler, the numerical simulation of combustion process in boiler is carried out to study the impact of air distribution modes on pipe burst of boiler heating surface. The results show that the temperature field at furnace center is in W shape distribution and symmetric under actual operation conditions. The change of temperature field is not sensitive in the furnace when the ratios of primary air and inside secondary air are 5/6 and 6/5 in front and back arch, and the temperature flame doesnt sweep over the heating surface; however, when the ratios of outside secondary air in front and rear arch and the graded wind in front and back wall are 5/6 and 6/5, the furnace temperature field appears skew, and the temperature flame badly sweeps over the cold ash hopper, which may cause pipe burst of heating surface at cold ash hopper.

关 键 词：“W”型火焰锅炉 配风方式 爆管 温度场 数值模拟 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]