Conveying screw for furnace
AssigneeThe International Metals Reclamation Company, Inc.
InventorsFrancisco Olano, John A. MacDougall, John K. Pargeter
Life of this patent
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Abstract
A countercurrent fluid cooled conveying screw is disclosed. Suitable for furnace applications, the screw includes an outer shaft spatially circumscribing an inner tube. A plurality of hollow, fluid cooled flights are affixed to the outer shaft and are in fluid flow communication with coolant coursing through the screw. The coolant is first directed through the flights and then back through the outer shaft before exiting through the inner tube.
Claims5
In combination with a furnace (10), a fluid cooled conveying screw (26) disposed therein, the conveying screw (26) comprising a proximal end (40), a distal end (42) and a hollow shaft (32) disposed therebetween, a plurality of spaced, continuous, fluid cooled, hollow, helical flights (36) affixed to the exterior of the shaft (32), coolant fluid entrance slots (46) disposed towards the proximal end (40), each coolant fluid entrance slot (46) communicating with an individual flight (36), coolant fluid exit slots (46) disposed towards the distal end (42), each coolant fluid exit slot (46) communicating with an individual flight (36), an inner tube (58) disposed within the shaft (32) communicating with the distal end (42) and partially extending through the shaft (32), and the shaft (32) and the inner tube (58) forming an annular space (56) therebetween wherein fluid flows from the entrance slots (46) through the helical flights (36) and through the exit slots (46) through the annular space (56) and out the distal end (42) of the shaft (32).
Dependencies are inferred from the claim text.