摘要
为了降低四角切圆锅炉水冷壁区域H_(2)S体积分数,达到缓解水冷壁高温腐蚀的目的,对600 MW锅炉进行了摸底测试。结果表明:高负荷下的水冷壁高温腐蚀明显比低负荷下的严重,前墙水冷壁的高温腐蚀比其他墙水冷壁的严重,燃烧器下游邻角炉墙区域的高温腐蚀情况普遍高于其他区域的。造成这种现象的原因是:各粉管煤粉粉量均匀性偏差较大,配风不合理,一、二次风分离,二次风无法完全包裹一次风。采取调整一次风粉管的煤粉粉量均匀性、适当提高含氧量、适当提高周界风风量,能够显著降低水冷壁区域的H_(2)S体积分数,缓解高温腐蚀。
In order to reduce the H_(2)S volume fraction in the water wall area of the tangentially rounded boiler and achieve the purpose of alleviating the high temperature corrosion of the water wall,the 600 MW boiler was tested and the cause analysis was carried out.The results show that the high temperature corrosion of the water wall under high load is obviously more serious than that under low load.The high temperature corrosion of the water wall of the front wall is more serious than that of other wall water walls.The high temperature corrosion of the adjacent corner furnace wall downstream of the burner is generally higher than that under low load.Other areas.The reason for this phenomenon is that the uniformity of the pulverized coal amount in each pulverized tube is large,the air distribution is unreasonable,the primary and secondary air are separated,and the secondary air cannot completely cover the primary air;adjust the primary air and powder pipe,the uniformity of the distribution of pulverized coal,the appropriate increase of the total air volume,and the appropriate increase of the peripheral air volume can significantly reduce the H_(2)S volume fraction in the water wall area and alleviate high-temperature corrosion.
作者
王克
Wang Ke(Special Equipment Supervision and Inspection of Shanghai Institute of Technology)
出处
《冶金能源》
2023年第2期38-43,共6页
Energy For Metallurgical Industry
关键词
四角切圆锅炉
燃烧优化
高温腐蚀
H
2S
tangentially rounded boiler
combustion optimization
high temperature corrosion
H_(2)S
