Apparatus for drying a fibre web

Details Apparatus for drying a fibre web Apparatus for drying a fibre web

1989-05-08

1990-09-25

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

For diverse operations on treated material

34 9, 34 95, F26B 1900

Patent

active

049584448

ABSTRACT:
An apparatus for drying a fibre web (4), wherein the web (4) is dired in at least two successive drying zones between a heated band (1b, 1d) and a cooled band (1a, 1c) moving substantially in parallel with and at equal speed as the web (4), the bands being endless and air-tight and having good thermal conductivity. In order to shorten the apparatus and to save energy, it comprises several drying zones positioned on top of each other in a direction transverse to the surface of the web (4), whereby the web (4) moves in opposite directions in drying zones positioned immediately on top of each other. Further, the endless band (1b, 1c) positioned between two drying zones positioned on top of each other forms one of the drying elements in both drying zones, whereby the same cooling or heating means (8, 9) positioned within the band (1b, 1c) between the rolls (2b, 3b; 2c, 3c) can cool or heat the web sections positioned within the length of both drying zones.

REFERENCES:
patent: 4112586 (1978-09-01), Lehtinen
patent: 4457145 (1984-07-01), Sando et al.

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