Waterwall corrosion in low-NOx combustion boilers

被引：0

作者：

Kihara, S ^{[1
]}

Nakagawa, K ^{[1
]}

Kajigaya, I ^{[1
]}

机构：

[1] Ishikawajima Harima Heavy Ind Co Ltd, Koto Ku, Tokyo 135, Japan

来源：

CORROSION AND ITS CONTROLS, VOLS I AND II | 1998年

关键词：

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Corrosion behavior of waterwall tube(carbon steel)were investigated in three industrial boilers in which low-NOx combustion had been introduced. Heavy corrosion was observed in the boilers where high S fuels were used. The corrosion is attributed to sulfidation in reducing atmosphere caused by sub-stoichiometric combustion. The corrosion rate depends on H2S content in combustion gas. Installation of boundary air injection system, applications of 50Cr-50Ni spray coating and stainless steel cladding on the tubes are effective for the countermeasures. But the spray coating should not be furnished to the area which is suffered from fire cracking, because the fire cracking is accelerated by crack of splayed layer.

引用

页码：99 / 106

页数：8