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首页> 外文期刊>Environmental Systems Research >Prevention of stack corrosion under wet flue gas desulfurization conditions in a coal-fired power plant: performance analysis and comparative study
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Prevention of stack corrosion under wet flue gas desulfurization conditions in a coal-fired power plant: performance analysis and comparative study

机译：防止燃煤电厂湿烟气脱硫条件下烟囱腐蚀的性能分析和对比研究

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Background This study investigated the prevention of stack corrosion under wet flue gas desulfurization conditions in a coal-fired power plant. The performance analysis and comparative studies of six materials for the prevention of stack corrosion were investigated. Results The ion chromatography analysis showed the acid condensation contained fluoride, chloride, nitrate, sulphate, and sulphite. The weight loss method showed titanium alloy and foam glass blocks were heat and acid resistant. The scanning electron microscopy indicated the morphologies were pits, cracks, and flakes for sulfuric acid dew corrosion resistant steel, and X-ray diffraction showed the corrosion products mainly consisted of Fe~(2)O~(3), FeSO~(4), FeOOH, with some Fe~(3)O~(4) or FeF~(3). The comparative study indicated that cyclic wet-dry conditions resulted in more aggressive corrosion to the stack than acid condensation. Conclusions Titanium alloy and foam glass blocks had the best performance and could be applied in the stack to prevent corrosion. The effects of cyclic wet-dry conditions should be taken into account to mitigate stack corrosion in coal-fired power plants.
机译：背景技术这项研究研究了在燃煤电厂在湿烟气脱硫条件下如何防止烟囱腐蚀。研究了六种防止烟囱腐蚀的材料的性能分析和对比研究。结果离子色谱分析表明，酸缩合反应中含有氟化物，氯化物，硝酸盐，硫酸盐和亚硫酸盐。失重法表明钛合金和泡沫玻璃块是耐热和耐酸的。扫描电镜观察表明，抗硫酸露腐蚀钢的形貌为点状，裂纹和片状，X射线衍射显示腐蚀产物主要为Fe〜（2）O〜（3），FeSO〜（4）。 FeOOH，以及一些Fe〜（3）O〜（4）或FeF〜（3）。对比研究表明，循环湿干条件比酸冷凝更能腐蚀电池堆。结论钛合金和泡沫玻璃块具有最好的性能，可以在烟囱中使用以防止腐蚀。应考虑循环干湿条件的影响，以减轻燃煤电厂烟囱的腐蚀。

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