[논문]발전소 절탄기 튜브의 배기가스 온도와 황산 농도에 따른 노점 및 내식성 분석

최재훈; 이승준

doi:10.5695/jsse.2022.55.6.433

발전소 절탄기 튜브의 배기가스 온도와 황산 농도에 따른 노점 및 내식성 분석
Analysis of dew point and corrosion resistance for power plant economizer tube with exhaust gas temperature and sulfuric acid concentration 원문보기

한국표면공학회지 = Journal of the Korean institute of surface engineering, v.55 no.6, 2022년, pp.433 - 440

최재훈 (군산대학교) , 이승준 (군산대학교 해양과학대학 마린엔지니어링전공)

Abstract ▼ AI-Helper

Environmental pollution caused by power plant exhaust gas is highlighted and eco-friendly regulations are being strengthened. However, due to the abundant reserves and low prices of coal, still the most used for power generation in the world. Therefore, flexible operation of coal-fired power plants to reduce emissions has become an inevitable option. However, lowering the output increases the possibility of acid dew point corrosion as the exhaust gas temperature decreases. The dew point corrosion occurs when condensable gases such as SO3, HCl, NO2 and H2O cools below the saturation temperature. SO3 is already well known to cause severe low- temperature corrosion in coal-fired power plants. Therefore, this study aims to prevent damage that may occur during operation by analyzing the dew point and corrosion resistance with exhaust gas temperature and sulfuric acid concentration of the power plant economizer tube.

주제어

표/그림 (8)

그림 Fig. 1. Specimen processing method
표 Table 1. Experimental conditions of pulsed DC magnetron sputtering process.
그림 Fig. 2. Sulfuric acid dew point corrosion chamber
표 Table 2. Composition of experimental mixed gas
그림 Fig. 3. Corrosion rate on various materials with solution temperature and sulfuric acid concentrations
그림 Fig. 4. Roughness profile on various materials with solution temperature
표 Table 3. Comparison of roughness with materials(unit: ㎛)
그림 Fig. 5. Comparison of surface morphologies after exposure test for 48 hours on the sulfuric acid concentration of 900ppm with temperature

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