摘要
为了防止燃烧器下流水冷壁发生高温腐蚀现象,在主燃区上部布置二次风喷口两侧布置贴壁风。利用流体仿真软件,对锅炉贴壁风工况下的炉内速度、温度及组分分布进行了数值模拟计算,重点分析贴壁风对切圆、侧壁区还原性气氛的影响。结果表明,贴壁风扩大了水冷壁区域的氧气覆盖范围,提高了氧气的浓度,降低了还原性气氛的浓度。贴壁风引入后速度场分布无明显变化,对燃烧无明显影响。
In order to prevent high-temperature corrosion of the water wall caused by the flowing wa-ter below the burner,secondary air nozzles are arranged on both sides of the main combustion zone with closing-to-wall air.Using fluid simulation software,numerical simulation calculations were con-ducted on the velocity,temperature,and component distribution inside the boiler under the condi-tion of wall adhering air,with a focus on analyzing the impact of closing-to-wall air on the reducing atmosphere in the sidewall areas.The results showed that the closing-to-wall air expanded the oxy-gen coverage range in the water-wall,increased the concentration of oxygen,and reduced the con-centration of reducing atmosphere.After the introduction of closing-to-wall air,there is no signifi-cant influence in the velocity and combustion.
作者
于洋
朱绘娟
王东旭
沈成喆
张超
YU Yang;ZHU Huijuan;WANG Dongxu;SHEN Chengzhe;ZHANG Chao(Sanhe Power Generation Co.,Ltd.,Sanhe 065201,China;Harbin Boiler Company Limited,Harbin 150046,China)
出处
《锅炉制造》
2024年第2期16-18,21,共4页
Boiler Manufacturing
关键词
四角切圆
贴壁风
数值模拟
Tangentially-fired boiler
closing-to-wall air
Numerical simulation
