목재 펠릿의 회성분 조성이 회분의 녹는점에 미치는 영향

Abstract

Ashes are produced by burning of biomass fuels and the remained ashes in the boiler which has low melting point can be melt during the combustion process. This melted ashes moved to the inner wall of the boiler and then were solidified in the heat exchanger, causing slagging and fouling. Therefore, the internal thermal flow in the furnace is disturbed, the thermal efficiency of the boiler can be reduced, and the inner wall of the boiler is damaged. In this study, the melting point of ashes produced from burning mixed wood pellets was investigated. The melting temperature was determined by Ash Fusion Temperature and the composition of ashes was determined by X-ray fluorescence. Each component ratio was substituted for the slagging index and the fouling index to investigate the tendency for the melting The relationship between melting point and the slagging index or the fouling index, which was calculated by using a component ratio of ash, was studied. The higher the proportion of acid or base, the higher the melting point. The ratio of SiO2 and CaO showed a great influence on the melting point.