Method for drying a porous web in an extended nip press

Details Method for drying a porous web in an extended nip press Method for drying a porous web in an extended nip press

1983-03-16

1985-03-26

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 14, 34 41, 34 70, 34 73, 34162, F26B 320

Patent

active

045064563

ABSTRACT:
A method for drying a porous web, according to which method the wet web is passed onto at least one drying felt, the web and the drying felt are subjected to an air removal treatment, and the web and the drying felt are passed between two surface elements which are impermeable to liquid and form an extended press zone in which the web is subjected to a pressing effect from both sides. Before the press zone the wet web is heated to a temperature of at least nearly 100.degree. C., and in the press zone the drying felt is kept at a temperature lower than the temperature of the wet web, so that a lower pressure is produced in the drying felt, and the high temperature of the water in the web causes an explosive evaporation and transfer of water from the web into the felt.

REFERENCES:
patent: 4106209 (1978-08-01), Brown
patent: 4112586 (1978-09-01), Lehtinen
patent: 4339619 (1983-08-01), Martin

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