RATE OF CORROSION OF WATERWALLS IN SUPERCRITICAL PULVERISED FUEL BOILERS

被引：7
|
作者：
Pronobis, Marek [1 ]
Litka, Rafal [1 ]
机构：
[1] Silesian Tech Univ, Inst Power Engn & Turbomachinery, PL-44100 Gliwice, Poland
来源：
CHEMICAL AND PROCESS ENGINEERING-INZYNIERIA CHEMICZNA I PROCESOWA | 2012年 / 33卷 / 02期
关键词：
subcritical and supercritical boilers; corrosion; waterwalls;
D O I：
10.2478/v10176-012-0026-x
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
This paper presents an analysis of the corrosion hazard in the burner belt area of waterwalls in pulverised fuel (PF) boilers that results from low-NOx combustion. Temperature distributions along the waterwall tubes in subcritical (denoted as SUB) and supercritical (SUP) boilers were calculated and compared. Two hypothetical distributions of CO concentrations were assumed in the near-wall layer of the flue gas in the boiler furnace, and the kinetics of the waterwall corrosion were analysed as a function of the local temperature of the tubes. The predicted rate of corrosion of the boiler furnace waterwalls in the supercritical boilers was compared with that of in the subcritical boilers.
引用
收藏
页码：263 / 277
页数：15
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