To provide an operation method which prevents the occurrence and deposition of a clinker in a discharge shoot of a gasifying furnace in a fusion facility for industrial wastes such as an automobile shredder dust and consumer electronic shredder dust.
When sand introduced from an upper part of a fluidized bed is discharged from a discharge shoot, the discharge rate of the sand flowing in the discharge shoot is managed at a discharge rate per unit area within a range not lower than a temperature required for maintaining the combustion in a furnace. At this time, the discharge rate of the sand per unit area is defined as 3,000 to 4,700 kg/hr×m2. The amount of steam jetted into the discharged shoot is defined as 700 to 1,500 kg/hr×m2 per unit area within a range not lower than the temperature required for maintaining the combustion in a furnace.
NOTO HISAJI
YABE SHOJI
