Heat recirculating dryer

Details Heat recirculating dryer Heat recirculating dryer

1990-02-26

1991-08-06

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

432105, F26B 1104

Patent

active

050366025

ABSTRACT:
A dryer for extracting moisture from goods and recirculating at least a portion of the air withdrawn from a tumbler cylinder located within the dryer. The dryer includes an air distribution system for supplying heated air to the tumbler cylinder, withdrawing air from the cylinder, and recirculating at least a portion of the air withdrawn from the cylinder. The air distribution system includes a burner tube and a heating passageway disposed about a portion of the burner tube, the passageway being connected for directing recirculated air about the burner tube to heat the recirculated air. The air circulating system also includes an air flow tube concentric with a portion of the burner tube for directing ambient air about the burner tube for cooling the burner tube.

REFERENCES:
patent: 3969070 (1976-07-01), Thompson
patent: 4665628 (1987-05-01), Clawson

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