运行参数对旋流燃烧锅炉冷灰斗高温腐蚀的影响  

Influence of operating parameters on high temperature corrosion of cold ash hopper of swirling combustion boiler

作　　者：赖金平 LAI Jinping(Guoneng Nanjing Electric Power Experimental Research Co.,Ltd.,Nanjing 210023,China)

机构地区：[1]国能南京电力试验研究有限公司,江苏南京210023

出　　处：《中国高新科技》2023年第19期70-72,共3页

摘　　要：文章以某台670MW对冲燃烧锅炉为研究对象,分析了冷灰斗区域高温腐蚀产生的原因。通过提高运行氧量、降低煤粉细度、增加底层二次风量及将高硫煤放置在中层掺烧等运行方式能够降低冷灰斗近壁区还原性气氛浓度,但是冷灰斗近壁区仍处于还原性气氛中,无法从根本上解决冷灰斗区域高温腐蚀问题。提出通过增加新型贴壁风系统,优化燃烧配风等技改方案,减少煤粉颗粒掉落冷灰斗区域燃烧,从根本上解决冷灰斗高温腐蚀问题。This article taking a 670MW opposed swirl combustion boiler as the research object,the causes of high-temperature corrosion in the cold ash hopper were analyzed.By increasing the operating oxygen content,reducing the fineness of coal powder,increasing the secondary air volume at the bottom layer,and placing high sulfur coal in the middle layer for mixed combustion,the reducing atmosphere concentration near the wall of the cold ash hopper can be reduced.However,the near wall area of the cold ash hopper is still in a reducing atmosphere,which cannot fundamentally solve the problem of high-temperature corrosion in the cold ash hopper area.Propose to fundamentally solve the problem of high-temperature corrosion in the cold ash hopper by adding a new type of wall mounted air system,optimizing combustion air distribution,and other technical renovation plans to reduce the combustion of coal powder particles falling into the cold ash hopper area.

关 键 词：对冲燃烧锅炉 冷灰斗 高温腐蚀 运行优化 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]