双炉膛双切圆电站锅炉水冷壁防高温腐蚀数值模拟研究  

Numerical Simulationon High Temperature Corrosion Resistance on Water Cooled Furnace Wall of Double-cut Boiler

作　　者：吕勇兴 赵亚莹[2] 曹兰田 孙文选 LV Yongxing;ZHAO Yaying;CAO Lantian;SUN Wenxuan(China Energy Digital Technology Group Co.Ltd.,Beijing,100020;School of Energy and Power Engineering,Northeast Electric Power University,Jilin Jilin 132012;China Petroleum Group Electric Energy Co.Ltd.,Daqing,Hei Longjiang,163411)

机构地区：[1]中能建数字科技集团有限公司,北京100020 [2]东北电力大学能源与动力工程学院,吉林吉林132012 [3]中国石油集团电能有限公司热电二公司,黑龙江大庆163411

出　　处：《东北电力大学学报》2023年第4期39-44,共6页Journal of Northeast Electric Power University

基　　金：国家自然科学基金青年项目(52206132)。

摘　　要：锅炉水冷壁高温腐蚀是影响大型火力发电机组安全、经济运行的主要因素之一。文中针对某国内1000 MW双切圆锅炉试运行期间左右墙水冷壁发生高温腐蚀的现象,通过Fluent数值模拟,分别研究了燃烧器高宽比和二次喷口摆动角度对水冷壁高温腐蚀的影响。模拟结果表明:锅炉在实际运行时应使用高宽比较小的燃烧器组合方式;二次风喷口在向上摆动15°时燃烧区域贴壁面处CO浓度均小于3%,氧气含量充足,可以有效降低水冷壁高温腐蚀的风险。High-temperature corrosion on water cooled furnace wall of boiler is a paramount affecting factor on safety and economical operation of thermal power units.In this paper,the high-temperature corrosion on left and right water cooled furnace wall of a domestic 1000 MW double-cut round boiler was researched.Influences of burner aspect ratio and secondary nozzle swing angle on the water cooled furnace wall with high-temperature corrosion was investigated by numerical simulation(commercial software:Fluent).The numerical results show that the boiler should be applied in the burner assemble with a relatively lower aspect-ratio.When secondary air nozzle swings upward by 15°,the CO concentration in near-wall region was less than 3%.In addition,oxygen content was sufficient to effectively reduce the risk of high-temperature corrosion on water cooled furnace wall.

关 键 词：高温腐蚀 数值模拟 双切圆锅炉 燃烧器高宽比 二次风喷口摆动角度 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]