Analysis on Leakage of Water Wall Tube of 330MW Power Plant Boiler
330MW电站锅炉水冷壁管泄漏问题分析

摘要

某电厂330MW锅炉运行中发生水冷壁管泄露，经过宏观观察及对泄露部位进行金相和硬度检验，发现水冷壁管泄漏处外壁已部分吹损，近内壁处泄漏口右侧边缘有3处夹杂。此次水冷壁管泄漏的原因分析为母材含有夹杂造成运行时强度不够发生泄漏。

Abstract

Water wall tube leakage occurred in the operation of a 330MW boiler in a power plant. Through macroscopic observation and metallographic and hardness inspection of the leaking parts, it was found that the outer wall of the leaking part of water wall tube was partially blown, and there were three inclusions near the right edge of the leaking part of the inner wall. The reason analysis of the water wall tube leakage is that the base material contains inclusions, which causes the leakage due to insufficient strength during operation.