600MW“W”型火焰锅炉炉内燃烧过程的数值模拟  

Numerical simulation on combustion process of 600 MW W-flame boiler

作　　者：曹小玲[1] 皮正仁[1] 彭好义[2] 蒋绍坚[2] 

机构地区：[1]长沙理工大学能源与动力工程学院,湖南长沙410004 [2]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2012年第3期1185-1191,共7页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究计划("973"计划)项目(2009CB219803-03);湖南省高校重点实验室科学研究项目(2009NGQ007);湖南省重点实验室开放基金资助项目(2010KFJJ006)

摘　　要：为了分析"W"型火焰锅炉爆管原因,对某电厂某台600MW"W"型火焰锅炉在100%,75%和50%负荷下以及不同煤质情况下的燃烧过程进行数值模拟计算,研究不同负荷及不同煤质时锅炉炉内速度场、温度场的分布。研究结果表明:100%负荷和50%负荷下速度场和温度场比较对称,75%负荷下则出现明显的偏斜;在100%负荷下,火焰冲刷下炉膛的前后墙两端较严重;在50%负荷下,炉膛火焰中心有所下移,冷灰斗处温度较高;在75%负荷下,后墙火焰冲刷前墙严重,上炉膛温度偏高以致过热器温度过高,这些区域都容易引起受热面结渣和爆管。In order to understand reasons of pipe expansion for W-flame boiler, numerical simulation on combustion process from 100%, 75%, 50% loads and different coals were conducted in the certain 600 MW W-flame boiler of certain power Plant. The results indicate that the temperature field and the flow field are symmetrical on the load of 100% and 50%, but the load of 75% remarkably causes skew, the flame badly sweeps over the front and back wall of ends in lower hearth in the load of 100%, the flame center is decreased and the temperature of cold ash hopper is higher in the load of 50%, the flame of back wall sweeps over front wall and temperature of upper hearth is too high and makes superheater over-temperature on the load 75%, all of these zones can lead to slagging and pipe expansion of water screen.

关 键 词：“W”型火焰锅炉 速度场 温度场 爆管 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]