贴壁风与碗式配风协同解决对冲旋流锅炉高温腐蚀问题  

High temperature corrosion problem of offset cyclone boiler solved by near-wall air and bowl-type air distribution

作　　者：杨振 朱宣而 黄亚继[2] 岳峻峰[1] 王新宇[2] 张强 徐力刚[2] 谢灵鸥 YANG Zhen;ZHU Xuaner;HUANG Yaji;YUE Junfeng;WANG Xinyu;ZHANG Qiang;XU Ligang;XIE Ling′ou(Jiangsu Frontier Electric Technology Co.,Ltd.,Nanjing 211102,China;Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;Jiangsu Guoxin Yangzhou Power Generation Co.,Ltd.,Yangzhou 225000,China)

机构地区：[1]江苏方天电力技术有限公司,江苏南京211102 [2]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096 [3]江苏国信扬州发电有限责任公司,江苏扬州225000

出　　处：《洁净煤技术》2021年第6期170-179,共10页Clean Coal Technology

基　　金：江苏省产业前瞻与共性关键技术资助项目(BE2017037)。

摘　　要：为解决燃煤锅炉水冷壁高温腐蚀问题,选用650 MW超临界对冲旋流锅炉为研究对象,将碗式配风的风量偏差与贴壁风配风方式作为变量进行数值模拟,探究一种贴壁风与碗式配风协同解决高温腐蚀的方法。结果表明:模拟所得的侧墙CO富集区与水冷壁实际发生腐蚀的位置基本吻合,模拟参数与实测炉膛出口参数误差小于5%。贴壁风与碗式配风的协同方法相比单一的贴壁风方法具有更好的防腐效果,在与碗式配风调整协同解决高温腐蚀问题时,贴壁风的用量可适当减少。当碗式配风的总风量偏差增大至24%时,协同方法可将高温腐蚀面积比值降至1%以下。当碗式配风的总风量偏差达到36%时,炉膛出口NO_(x)质量浓度将大幅增加,因此可认为在实际工程应用中,与贴壁风方法协同时,碗式配风的总风量偏差不宜超过24%。In order to solve the problem of high temperature corrosion,a 650 MW supercritical offset cyclone boiler was used as the research object.In the numerical study,the air volume deviation of the bowl-type air distribution and the near-wall air distribution method were used as variables to explore a synergetic method to solve the problem of high temperature corrosion.The results show that the simulated CO enrichment area of the side wall is basically consistent with the actual corrosion location of the water wall,and the error between the simulated parameters and the measured furnace outlet parameters is less than 5%.Compared with single near-wall air method,the synergetic method has better anti-corrosion effect.When to solve the problem of high-temperature corrosion,the amount of near-wall air can be appropriately reduced.When the total air volume deviation of the bowl-type air distribution increase to 24%,the synergetic method reduce the high-temperature corrosion ratio to below 1%.When the deviation of the total air volume of the bowl-type air distribution reaches 36%,the NO_(x) mass concentration at the boiler outlet increase significantly.Therefore,in practical engineering applications,the deviation of the total air volume of the bowl-type air distribution should not exceed 24%.

关 键 词：高温腐蚀 原性气氛 贴壁风 碗式配风 水冷壁 协同方法 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]