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Korean Chemical Engineering Research,
Vol.43, No.4, 525-530, 2005
Vol.43, No.4, 525-530, 2005
상용 순환 유동층 연소로 수관벽 전열관 마모속도
Tube Erosion Rate of Water Wall in a Commercial Circulating Fluidized Bed Combustor
상용 순환 유동층 연소로(200 ton steam/hr, 4.97X9.90X28.98 m)의 수관벽에서 전열관의 마모속도를 측정 및 고찰하였다. 전열관의 두께는 초음파 측정방법을 이용하여 측정되었다. Splash 영역에서 윙월을 포함한 모든 수관벽 전열관의 마모속도가 두드러졌다. 전열관의 마모속도는 분배기로부터 높이가 증가함에 따라서 감소한 후 다시 증가하였다. 프리보드 기체출구 부근의 윙월에서는 기체 및 고체흐름의 편향성으로 인한 마모속도의 차이도 나타났다. 윙월의 마모속도는 연소로 단면의 중앙에 위치할수록 크게 나타났다.
The erosion rate of water wall tube has been measured and discussed in a commercial circulating fluidized bed combustor (200 ton steam/hr, 4.97 × 9.90 × 28.98 m height). Tube thickness was measured with ultrasonic method. Severe tube erosion rate was observed in the splash region on all waterwalls including wingwalls. The tube erosion rate increased after an initial decrease as height from the distributor increased. The difference of erosion rate among wing walls was found due to unbalanced distribution of gas and solid flow rates. The erosion rate of the wing wall increased as location of the wing wall became closer to the center of combustor crosssection.
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