The function of fluidized air of the air & water  slag -cooler is the key for using cold air for heat changing with the slag of boiler by means of the principle of fluidized bed, thus the purpose of cooling the boiler is reached. So the fluidized air of the air & water slag-cooler shall have enough head to overcome the resistance inside the slag-cooler of fluidized bed the boiler. 

The function of the fluidized fan of the air & water slag-cooler is to provide the fluidized air of the slag-cooler.