OPERATING METHOD AND OPERATION CONTROL APPARATUS FOR GASIFICATION MELTING FURNACE

摘要

[PROBLEMS] 1. To realize high-efficiency operation of a gasification melting furnace by cessation of an auxiliary burner and, at the same time, to avoid abnormal combustion of unburned gas in reignition of the auxiliary burner. 2. To facilitate the regulation of the basicity to a proper value without the need to use a special analyzer for a slag composition in the operation of a gasification melting furnace. [MEANS FOR SOLVING PROBLEMS] 1. In a gasification melting furnace, the operation of a burner of the melting furnace is stopped when the operation state satisfies a predetermined requirement. Thereafter, when the temperature in the vicinity of the burner is lowered to a predetermined temperature, the supply of a waste material from a dust feeder to the gasification furnace is stopped. This burner is reignited when the concentration of oxygen in gas in the outlet of the gasification furnace is increased by stopping the supply of the waste material to the gasification furnace. 2. The basicity of slag discharged from a slag-discharge port in a melting furnace is adjusted by supplying a basicity adjuster from an apparatus for supplying the basicity adjuster. Correlation between a parameter corresponding to the calorific value of the waste material per unit weight and the slag basicity is used to determine the amount of the basicity adjuster supplied.