| 摘要 |
PURPOSE:To be able to recover heat efficiently by a method wherein fluidized solids are moved with revolution in a fluidized bed and heat is recovered from the part of the fluidized where a small amount of air is blown off so as not to disturb the revolving movement and fuel is supplied to the place near the upper surface of the fluidized bed or the part where a large number of air is blown off. CONSTITUTION:At the neighborhood of a fluidized bed installed at the upper part of a wind box 9 heat transfer pipe groups 16 are arranged and the intervals of the groups 16 between the right and left sides in the horizontal direction are sufficiently widened and at their upper and lower parts sufficiently wide paths are formed so as not to obstruct or resist the movement of fluidized solids. Air 2 is sent to the box 9 in such an extent that granular solids are able to be fluidized but not brought in a violent fluidized condition and air amount in excess of two times that sent to the center is sent to wind boxes 8, 10. Fuel is charged from a hopper 20 into an incinerator and an air to fuel ratio in the incinerator is kept properly. By the air 2, blow-up velocity is small at the upper part of the box 9 to lower the granular solids and at the right and left boxes 8, 10, blow-up velocity is large to raise the granular solids. After combustible wastes and fuel are charged from a fuel charge hole 22, they are moved to the center of a blow-off surface 3 and sink together with the fluidized medium and move along a revolving stream in the incinerator and are completely burnt by large excess air ratio and violent fluidization.
|
