Analysis of the Influence of the Added SCR Denitrification Unit on Cold End Corrosion of the Air Preheater

doi:10.11930/j.issn.1004-9649.201612097

Abstract

Abstract: Selective catalytic reduction technology is most widely used in the coal-fired power plant. Since some power plants have not retrofitted the air preheater in the process of denitration transformation, corrosion of the cold end components within the air preheater happens after a certain period of operation of the denitrification system. A 2×300 MW unit is taken as a case for this study to analyze the causes of the corrosion of the cold end components within the air preheater after the installation of the SCR denitrification. It concludes that the direct cause is the catalyst activity reduction some preventive measures and treatment suggestions are proposed from the operation management perspective.

Key words: thermal power unit, air preheater, cold end element, corrosion, ammonium bisulfate (NH₄HSO₄), catalyst activity

CLC Number:

LI Chao. Analysis of the Influence of the Added SCR Denitrification Unit on Cold End Corrosion of the Air Preheater[J]. Electric Power, 2018, 51(5): 47-51.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201612097

https://www.electricpower.com.cn/EN/Y2018/V51/I5/47

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