Open burner plenum for a flotation dryer

Details Open burner plenum for a flotation dryer Open burner plenum for a flotation dryer

1997-04-30

1999-01-12

Capassela, Ronald C.

Drying and gas or vapor contact with solids

Apparatus

Sheet, web, or strand

34643, F26B 900

Patent

active

058572708

ABSTRACT:
Air flotation dryer for floatingly drying travelling webs. The dryer includes a housing having a web inlet and a web outlet spaced from the web inlet, and a plurality of elongated air nozzles arranged transversely to the direction of movement of the web and preferably located on opposite sides of the web, the nozzles being secured directly to, supported by and in air-receiving communication with longitudinally extending supply air ducts. An air supply fan is in communication with the supply air ducts to supply air to the nozzles. Heat is provided to the apparatus with a draw-through style burner, which fires into the dryer enclosure and the proper amount of air flow to be heated by the burner (e.g., flowing past the burner) is regulated such as by a return air screen having a predetermined or variable open area, resulting in a simpler design and a lower pressure drop than in the conventional ducted design where the recirculation air is first collected in a duct and is then heated and sent to the supply fan inlet.

REFERENCES:
patent: 3308555 (1967-03-01), Kruger
patent: 3739491 (1973-06-01), Creapo et al.
patent: 5608973 (1997-03-01), Karlstedt et al.

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