Introduction Of Fluid Bed Dryer

A fluid bed dryer comprising a drying chamber and a heating jacket contiguous with a drying chamber

. The drying chamber and the heating jacket are each adapted to contain a bed of fluidizable particulate heat transfer material and each has a fluidizing gas inlet and an exhaust gas outlet. The drying chamber also has a feed inlet and a feed outlet. The fluid bed dryer may be used in a heat exchange system in combination with means for conveying a slurry comprising liquid and combustible waste solids to the feed inlet of the drying chamber of the fluid bed dryer; a reactor having a feed inlet, a reaction section, and a vapor exhaust port; conveyor means for transferring solids from the feed outlet of the drying chamber to the feed inlet of the reactor; conduit means connecting the vapor exhaust port of the reactor to the fluidizing gas inlet of the heating jacket of the dryer; and means for providing fluidizing gas to the fluidizing gas inlet of the drying chamber.

The heat exchange system of claim 2 in which the conveyor means comprises a first conveyor screw in communication with the feed outlet of the drying chamber, said first conveyor screw having a feed inlet end extending through the heating jacket and into the drying chamber of the fluid bed dryer and a discharge end, a dried solids received in communication with the discharge end of the first conveyor screw, a second conveyor screw having a feed inlet end in communication with the dried solids receiver and a feed discharge end in communication with the reactor feed inlet, and drive means connected to said first and second screw conveyors to impart, upon actuation thereof, rotation to said first and second conveyors to effect movement of solids from the dryer to the reactor.

The fluid bed dryer of claim 13 in which said drying chamber contains a gas distributor plate positioned in the lower portion of said drying chamber, said plate being adapted to support a bed of fluidizable particulate heat transfer material.

The fluid bed dryer of claim 1 having a vertical cylindrical drying chamber and in which said heating jacket comprises a cylindrical chamber surrounding said drying chamber.

by: ericfu

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