Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1995-02-17
1998-02-24
Bennett, Henry A.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34114, 34445, 34123, 34116, D06F 5800
Patent
active
057201099
ABSTRACT:
A method and device for contact drying a paper web, wherein the paper web is dried initially in a number of successive groups with single-wire draw by pressing the paper web via drying wires of each groups against the heated faces of the drying cylinders and by guiding the paper web on support of the same drying wire from one drying cylinder onto the next drying cylinder over the reversing suction cylinders or rolls in each group with single-wire draw. In the groups with single-wire draw, the paper web is dried to a first dry solids content, after which the paper web is dried directly further by a single group with twin-wire draw to a second dry solids content, after which the paper web is dried further to its final dry solids content by a single normal group with single-wire draw. The limits of the first and second dry solids contents are selected so that, in the middle or in the beginning of the range, the tear strength index and the breaking strength index of the web are at their maximum.
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Bennett Henry A.
Doster D.
Valmet Corporation
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