4303 石炭灰の基礎的な性状におよぼす燃焼条件および石炭性状の影響(S62-1 高効率石炭火力発電(1),S62 高効率石炭火力発電)

概要

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It is very important to control the coal ash properties for effective utilization of coal ash. The influence of combustion conditions (particle size of pulverized coal, two-stage combustion ratio) and coal properties (fuel ratio, acid ratio) on the coal ash properties (size, specific surface area, density and shape) were examined by use of a pulverized coal combustion test furnace. As the particle size of pulverized coal decreased, the particle size of coal ash is decreased. On the other hand, the density of coal ash is increased and the shape of ash particle approaches spherical. The shape of ash particle becomes nonspherical with the increase in the two-stage combustion ratio because of increase in unburned carbon concentration in fly ash. The size distribution of coal ash becomes wide with the decrease in the fuel ratio.
社団法人日本機械学会の論文
2006-09-15