Fluidized bed furnace for burning partly dehydrated sludge and m

Details Fluidized bed furnace for burning partly dehydrated sludge and m Fluidized bed furnace for burning partly dehydrated sludge and m

1974-11-01

1976-03-02

Sprague, Kenneth W.

Furnaces

With fuel treatment means

Preliminary refuse treatment means

110 28J, 110 8A, F23G 512

Patent

active

039410650

ABSTRACT:
A fluidized bed furnace, particularly for burning partly dehydrated sludge, comprises a furnace housing which has a bottom for supporting a fluidized bed and it includes a plurality of nozzles directed to discharge upwardly through the bottom wall into the bed for supplying heating gases including combustion air. The furnace has side walls which extend upwardly from the bottom above the bed and define a combustion chamber above the bed. The combustion chamber is closed at its top by a substantially horizontal furnace roof. At least one sludge charging opening is provided in the furnace roof for charging the sludge downwardly into the combustion chamber. A post combustion chamber is connected downwardly through the roof to the combustion chamber and it is made of a cross-section which is substantially smaller than the combustion chamber. Means are provided for supplying secondary combustion air to the post combustion chamber. Burners are provided for part-time operation which discharge obliquely downwardly into the combustion chamber from the upper portion of the side walls or the furnace roof.

REFERENCES:
patent: 3515381 (1970-06-01), Foch
patent: 3702595 (1972-11-01), Muirhead et al.
patent: 3772998 (1973-11-01), Menigat
patent: 3776150 (1973-12-01), Evans et al.
patent: 3848549 (1974-11-01), Pryor et al.
patent: 3863577 (1975-02-01), Steever et al.

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