Device for recovering heat of molten slag

A device for recovering heat of molten slag, comprising:

• a fluidized bed provided in a device main body and formed of fluidized bed material composed of crushed solidified slag;
• a molten slag feeder for supplying molten slag to said fluidized bed;
• heat exchangers for recovering heat from said fluidized bed;
• a solidified slag recovery device for recovering solidified slag, said solidified slag being formed in said fluidized bed as said molten slag is solidified;
• a crusher for crushing said solidified slag recovered by said solidified slag recovery device;
• a circulation device for returning to said bed material grains of said solidified slag crushed by said crusher;
• a bed material drawing device for partially drawing out said bed material;
• and
• an exhaust gas duct disposed on upper section of said device main body, particularly above said fluidized bed, wherein
• said molten slag supplier allows molten slag droplets to be dripped into said fluidized bed from a slag drip nozzle disposed on a slag pool provided above said fluidized bed,
• said circulation device returns said crushed grains of said solidified slag to said device main body from a bed material supply outlet provided above said fluidized bed, and
• said heat exchangers include:
• heat transfer tubes which are disposed in upper portion of said fluidized bed and in contact with said bed material in said fluidized bed;
• a heat exchanger disposed on a slide plate of said device main body;
• and
• heat transfer tubes which are disposed in said exhaust gas duct and in contact with exhaust gas in said exhaust gas duct.