Patent ID: 8764439

Claim:
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.