Method for contact drying a paper web and a dryer section of a p

Details Method for contact drying a paper web and a dryer section of a p Method for contact drying a paper web and a dryer section of a p

1995-03-24

1996-09-17

Larson, James

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34116, F26B 300, F26B 1308

Patent

active

055556388

ABSTRACT:
A method for contact drying a paper web, wherein the paper web is dried by heated smooth-faced drying cylinders by passing the web through successively arranged so-called normal groups with single-wire draw in which drying cylinders are situated in a first row and reversing suction cylinders or equivalent suction rolls are situated in a second row. Thereafter, the web is dried by passing it through a hybrid dryer group which hybrid dryer group consists of a normal portion with single-wire draw and a portion with twin-wire draw, one of the wires in the twin-wire portion constituting the wire of the portion with single-wire draw whereas the other wire in the twin-wire portion is a separate wire. The invention also relates to a dryer section of a paper machine wherein the initial part includes successively arranged so-called normal groups with single-wire draw after which one hybrid dryer group is provided, in which there is a portion with single-wire draw and a portion with twin-wire draw. In the hybrid group, one row includes drying cylinders over which the wire of the single-wire draw runs, and the other row includes reversing cylinders, suction rolls or equivalent, and drying cylinders. A separate wire runs over the drying cylinders in this row.

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patent: 5465505 (1995-11-01), Kertulla

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