순환 유동층의 수역학적 특성 및 석탄연소 특성 = Hydrodynamics and Coal Combustion Characteristics of Circulating Fluidized Beds

다국어 초록 (Multilingual Abstract)

In a circulating fluidized bed (7.8 ㎝-ID × 250 ㎝-high), flow regimes of coal-air system at room temperature and coal combustion efficiency and temperature profiles along the bed height have been determined. An anthracite domestic coal having heating value of 4,870 ㎉/ ㎏ was employed. Coal particle sizes were varied 0.205, 0.395 and 0.71 ㎜ for flow regime and 0.71 ㎜ for coal combustion studies. The transition velocity between bubbling and turbulent beds and the transport velocity between turbulent and fast beds have been determined. In a circulating fluidized bed, combustion efficiency was higher in the turbulent bed than that in the bubbling bed. Steady combustion operation can be easily maintained at much lower temperature in the turbulent bed than in the bubbling bed.