| 摘要 |
PROBLEM TO BE SOLVED: To easily control the combustion heat quantity in a melting furnace to be constant without generating the control delay by unifying the combustion control. SOLUTION: In this melting method, the refuse is directly or partially heated in a gasificatio furnace 1 and termally decomposed, and the generated gas, etc. C obtained in the pyrolysis is burned at high temperature in a rear stage melting furnace 2 to melt the ash into the slag. The auxiliary fuel D and the air B are fed to the melting furnace 2, and the increase/decrease in the feed of the auxiliary fuel D is controlled while maintaining the feed of the aid B at the constant level so that the oxygen concentration of the combustion waste gas from an outlet of the melting furnace is constant, and the combustion heat quantity in the melting furnace 2 is kept constant.
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