유연운전에 따른 석탄화력보일러 수계통 튜브에서의 이상 유동가속부식(Two-Phase Flow Accelerated Corrosion) 고찰
A Two-Phase Flow Accelerated Corrosion Study on Water Wall Tube of Coal-Fired Boiler According to Flexible Operation
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Recently, coal-fired power plants are experiencing many problems that they have never experienced beforedue to an increase in flexible operation. In particular, a two-phase flow accelerated corrosion on water walltubes in a boiler has not been detected overseas or domestically. There is no response plan to deal withsuch corrosion problem either. However, oxide film damage and tube material corrosion due to a two-phase flow accelerated corrosion are being discovered on water wall boiler tubes of domestic coal-firedpower plants recently. If this situation is severe, it can cause enormous damage such as tube rupture. There-fore, in this paper, in order to prepare a response plan for a two-phase flow accelerated corrosion on waterwall tubes in the future, differences between a two-phase flow accelerated corrosion and a single-phaseflow accelerated corrosion were investigated and an example of discovery of a two-phase flow acceleratedcorrosion on water wall tubes was presented.
Abstract
Recently, coal-fired power plants are experiencing many problems that they have never experienced beforedue to an increase in flexible operation. In particular, a two-phase flow accelerated corrosion on water walltubes in a boiler has not been detected overseas or domestically. There is no response plan to deal withsuch corrosion problem either. However, oxide film damage and tube material corrosion due to a two-phase flow accelerated corrosion are being discovered on water wall boiler tubes of domestic coal-firedpower plants recently. If this situation is severe, it can cause enormous damage such as tube rupture. There-fore, in this paper, in order to prepare a response plan for a two-phase flow accelerated corrosion on waterwall tubes in the future, differences between a two-phase flow accelerated corrosion and a single-phaseflow accelerated corrosion were investigated and an example of discovery of a two-phase flow acceleratedcorrosion on water wall tubes was presented.
참고문헌 (8)
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- Flow-Accelerated Corrosion in Nuclear Power Plant, "G. Andrei", US DOE Office of Nuclear Energy, ~, pp.Report Number INL (2015), EXT-15-36611-Rev000
- R. B. Dooley, "EPRI Heat Recovery Steam Generator Tube Failures: Theory and Practice, Vol. 2 : Water Touched Tubes", pp.31~38 (2007)
- "ASME SA213-T12, Tube for Boiler and Heat Exchanger" (2016)[URL]