Method and apparatus for preventing the adhesion of dust in an incinerator or melting furnace

A furnace comprising:

• a furnace body;
• a slag outlet open to said furnace body at the bottom thereof, said slag outlet including a slag separating chamber, an exhaust gas duct open to said slag separating chamber at an upper portion of said chamber, and a slag outlet open to said slag separating chamber at a lower portion of said chamber;
• said slag separating chamber having a ceiling comprising a refractory porous member and a plate-like member disposed above said refractory porous member so as to define a wind box therebetween;
• said gas duct comprising a porous refractory member and a plate-like member spaced radially outwardly therefrom so as to define a wind box therebetween;
• and means for introducing cooling gas into said wind boxes such that the cooling gas will be forced through the pores of said porous refractory members.

A method of preventing dust from adhering to an interior surface of a wall of a gas cooling chamber of a fluidized bed incinerator, said method comprising:

• feeding an atomized spray of water into said gas cooling chamber at a location above the fluidized bed of the incinerator;
• forming a portion of the wall of said gas cooling chamber, at the periphery of said location, as a porous refractory member having one side exposed to said gas cooling chamber and another side facing outwardly with respect to said chamber;
• and
• forcing gas through pores of said porous refractory member from said another side of said porous refractory member to said one side thereof.