Press drying concept

Details Press drying concept Press drying concept

1989-09-29

1990-05-08

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34117, 34 23, 34113, 34123, 162206, D06F 5800, F26B 300

Patent

active

049226274

ABSTRACT:
The invention consists of modified dryer section in a papermachine wherein elements normally found in the press section of the machine are included in the dryer section. The modification consists of the use of a press felt instead of a dryer felt and the addition of press rolls, adjacent to the dryer cylinders, forming nips through which the felt and the wet paper sheet to be dried are passed. Pocket ventilation rolls are also included to evaporate water absorbed by the felt from the paper sheet during passages through the nips. The dryer section incorporating these modifications can be viewed as a press-dryer hybrid. Improved dryer efficiency and lower costs per ton of paper produced are the results.

REFERENCES:
patent: 1660640 (1928-02-01), Asten
patent: 3283415 (1966-11-01), Schnyder
patent: 3293767 (1966-12-01), Means
patent: 4483745 (1984-11-01), Wicks et al.
patent: 4718982 (1988-01-01), Swenson et al.
patent: 4823688 (1989-04-01), Wedel et al.

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