摘要
为研究水冷壁高温腐蚀对锅炉运行的影响,对某660 MW超临界锅炉水冷壁高温腐蚀问题进行数值模拟,在保持切圆直径不变,通过改变切圆方式,采用新型墙式切圆进行模拟,比较不同位置切圆下炉内切圆位置。研究结果表明:在相同切圆直径与配风方式下,墙式切圆相对于角式切圆,炉内冷态速度场更加流畅稳定,且炉内最高温度有所降低;气氛浓度场中C_2墙小面积区域仍存在高温腐蚀,其他墙水冷壁附近还原性气体CO与腐蚀性气体H_2S有效降低在安全值以下。
To research the effect of the water cooling wall corrosion under high temperature on the boiler operation,the corrosion of the water cooling wall under high temperature is digitally simulated with new tangential wall under constant tangential diameter and the tangent positions of boiler with different tangential ways are compared.And the conclusions are given by research:with the same tangential diameter and wind distribution in boiler,the cool state velocity field with the wall tangential circle is more fluent and steady than one with the angle tangential circle.And the maximum temperature in the boiler is reduced,some high temperature corrosion is still found in a small region on the C2 wall in the atmosphere concentration field,and close to other water cooling walls the reductive gas CO and the corrosive gas H2S are reduced under the safety level.
作者
张立权
王建国
王存厚
ZHANG Liquan;WANG Jianguo;WANG Cunhou
出处
《青海电力》
2018年第2期11-17,共7页
Qinghai Electric Power
