Sealed rotary hearth furnace with central bearing support

Patent · Tue May 30 04:00:00 EDT 1989

OSTI ID:5648162

Docherty, J P; Johnson, B E; Beri, J

This patent describes a rotary hearth furnace. It comprises a stationary furnace wall with connecting roof and floor defining a closed furnace chamber therein; a rotatable hearth within the furnace chamber having a gas perforate surface for supporting a charge material thereon and having an open center region; a vertical cylindrical conduit supporting the hearth and communicating with the open center region thereof, the vertical cylindrical conduit extending from the hearth downwardly through an opening formed in the furnace floor and the vertical cylindrical conduit supported for rotation on bearing means positioned beneath the furnace floor; sealing means associated with the vertical cylindrical conduit and the furnace floor to seal off the opening therebetween; drive means for rotating the vertical cylindrical conduit and the hearth, feed means extending into the furnace chamber for charging particulate material onto the hearth, means for supplying hot gases to the furnace chamber between the hearth and the floor; means for withdrawing spent gas from the furnace chamber above the hearth; rabble means for moving the charge material across the hearth for discharge into the open enter region and the vertical cylindrical conduit.

• Assignee: Salem Furnace Co., Pittsburgh, PA (United States)
• Patent Number(s): US 4834650; A
• Application Number: PPN: US 7-206526
• OSTI ID: 5648162
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
DESIGN
FLUIDS
FURNACES
GASES
MOTION
ROTATION
WALLS