| 摘要 |
<p>In order to stably operate a boiler using several kinds of solid fuels including depleted ashes as fuels, adhesion of ashes is suppressed. A calculator (9) preliminarily collects properties of a solid fuel, such as the content rate of ashes and the composition of an ash constituent, as data (8). The calculator (9) uses the mix ratio of solid fuels as a parameter and calculates the composition of an ash constituent of the mixed fuels on the basis of the preliminarily measured composition of the ash constituent of each solid fuel. The calculator (9) determines a reference value of the rate of slug by which the deposit ratio of ashes is reduced on the basis of the relationship between the preliminarily measured deposit ratio of ashes and the ratio of slag. Further, the calculator (9) calculates the mix ratio of each solid fuel using a thermodynamic equilibrium calculation so as to obtain an ash composition in which the ratio of slag is not more than the determined reference value. On the basis of the mix ratio of each solid fuel calculated by the calculator (9), the amount of solid fuel dispensed from hoppers (1, 2) is adjusted by a fuel supply amount adjusting device (3). Thus, each solid fuel, the dispensed amount of which has been adjusted, is mixed by a mixer (4) and crushed by a crusher (5) before being supplied to a boiler (7) as a fuel and burned by a burner (6).</p> |
