Method of and an apparatus for drying a fibre web

Details Method of and an apparatus for drying a fibre web Method of and an apparatus for drying a fibre web

1989-06-20

1990-06-12

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 95, 34152, 34 69, F26B 332

Patent

active

049321390

ABSTRACT:
A method of and an apparatus for a drying fibre web (8) between two metal band (1, 4) moving in the same direction substantially in parallel with each other, whereby the fibre web (8) is led together with a felt (7) between the bands (1, 4), and the band (1) on the side of the web (8) is heated and the band (4) on the side of the felt (7) is cooled. In order to achieve a sufficient drying rate particularly when drying thick web grades while keeping the pressure exerted on the web at a low level, condensing pipes (13a to 13b) for back-pressure steam are mounted on the surface of the band (1) to be heated on the side facing away from the web (8), and a heat transfer medium, such as heat transfer oil (11) or the like, is provided between the pipes (13a to 13b) and the band (1).

REFERENCES:
patent: 4112586 (1978-09-01), Lehtinen
patent: 4506456 (1985-03-01), Lehtinen
patent: 4506457 (1985-03-01), Lehtinen

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