미분탄 화력발전소 보일러내부 국부유동 진단 및 마모예측기법 시험적용연구
The Field Test Result of Local Gas Flow Diagnosis & Erosion Estimation Technique in Coal Fired Power Plant Boiler
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초록
Boiler tube erosion by fly ash in coal-fired power plants is the most troublesome problem, resulting in unplanned shutdowns or significant maintenance costs. In order to reduce the such erosion phenomenon, it is necessary to measure the local flow of boiler inside accurately and to relieve the high velocity at local region. In this study, the off-line cold air flow diagnostics and real-time combustion analysis methods were applied to the plant site test, in order to evaluate the local gas flow velocity quantitatively and to estimate the erosion tendency in the boiler so that derive the optimal maintenance method. As a result, the area most susceptible to wear was predicted as the economizer tube which is located near the wall of the boiler back pass and the estimated maximum erosion rate was over the 300 μm/year
Abstract
Boiler tube erosion by fly ash in coal-fired power plants is the most troublesome problem, resulting in unplanned shutdowns or significant maintenance costs. In order to reduce the such erosion phenomenon, it is necessary to measure the local flow of boiler inside accurately and to relieve the high velocity at local region. In this study, the off-line cold air flow diagnostics and real-time combustion analysis methods were applied to the plant site test, in order to evaluate the local gas flow velocity quantitatively and to estimate the erosion tendency in the boiler so that derive the optimal maintenance method. As a result, the area most susceptible to wear was predicted as the economizer tube which is located near the wall of the boiler back pass and the estimated maximum erosion rate was over the 300 μm/year
참고문헌 (6)
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- Demonstration of the Cold Air Velocity Technique to Control Fly Ash Erosion at a National Thermal Power Corporation NTPC Plant, 1010542, "R.B. Doolye", EPRI, ~ (2004)
- 유기수, "석탄화력발전소 보일러 튜브 마모 문제에 관한 저온공기 속도 측정법 적용 및 검증", 대한기계학회논문집 B, 36(6), pp.663~668 (2012), 대한기계학회[DOI]
- 백세현, "75 MWe급 중유 발전소 보일러에 대한 바이오중유100% 전소 실증 연소실험 결과", 한국연소학회지, 19(2), pp.28~36 (2014), 한국연소학회[DOI]