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US 6,523,278 B1Granted
Dryer section
AssigneeMetso Paper, Inc.
InventorsLaurie Coulson, Kari Juppi, Jaakko Kallioniemi, Pekka Koivukunnas, Antti Komulainen, Juha Lipponen, Petri Norri
Life of this patent
Estimating the term…
Abstract
The invention concerns a dryer section, comprising at least one dryer group (R) that makes use of single-wire draw and/or twin-wire draw and at least one suction roll (10) with which the web (W) to be dried is in direct contact. The surface construction of the suction roll (10) is of a fine structure so that the web (W) can be passed to run over the suction roll (10) in direct contact with the roll so that the web (W) is not damaged.
Claims19
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the suction roll (10) is provided with a coating which is permeable to air.
4 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the suction roll (10) is provided with a shrink sock.
4 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the mantle of the suction roll has been coated with a metal wire.
4 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the at least one suction roll (10) is a grooved roll having a mantle drilled with a plurality of holes, wherein the diameter of the holes drilled in said mantle is at a maximum 3 mm and wherein the size of the grooves is at a maximum 3 mm and wherein the percentage of holes in the mantle is less than 3% and the percentage of grooves in the mantle is from 10 to 60%.
4 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the at least one suction roll (10) comprises:
- at least one of a zone (10c) of intensive vacuum structured and arranged to affix the web (W) onto the mantle of the suction roll (10) and a hold suction zone (10a) structured and arranged to maintain the web (W) on the mantle of the suction roll (10);
- and
- a blow zone (10b) structured and arranged to transfer the web (W) from the mantle of the suction roll (10) to a further treatment station in the paper machine.
7 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the at least one suction roll (10) comprises:
- a hold suction zone (10a) structured and arranged to maintain the web (W) on the mantle of the suction roll (10);
- and
- a blow zone (10d) structured and arranged to ventilate an adjacent pocket space (T) bounded by the at least one suction roll (10), a pair of drying cylinders (15) and a drying wire (17).
7 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the at least one suction roll (10) and the impingement drying equipment (20) operatively coupled thereto are fitted between a press section (P) and a first dryer group (R1) of the dryer section, whereby the at least one suction roll (10) and the impingement drying equipment (20) act as a first drying unit in the dryer section.
4 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) that makes use of at least one of a single-wire draw and a twin wire draw, wherein said at least one dryer group (R) comprises:
- at least one suction roll (10) structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) comprises:
- a mantle having a fine surface construction, whereby when the web (W) to be dried is passed over the at least one suction roll (10) the web (W) is not damaged;
- and
- an impingement drying equipment (20) operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the dryer section further comprises:
- an upper row of suction rolls (10);
- and
- a lower row of suction rolls (16), wherein said upper row of suction rolls and said lower row of suction rolls are structured and arranged to define nips (N) formed therebetween.
7 more elements
A dryer section for drying a web (W) in a paper machine, comprising:
- at least one dryer group (R) structured and arranged to dry the web (W);
- and
- at least one suction roll (10) operatively coupled to said at least one dryer group (R), the at least one suction roll (10) is structured and arranged to be in direct contact with the web (W) to be dried, wherein the at least one suction roll (10) includes a mantle having a surface which is of a fine construction, such that when the web (W) to be dried is passed over the mantle of the at least one suction roll (10) the web (W) is not damaged;
- and an impingement drying equipment (20), said impingement drying equipment being operatively coupled to said at least one suction roll (10), whereby said impingement drying equipment (20) is structured and arranged to dry the web (W);
- and
- wherein the suction roll (10) is provided with a coating which is permeable to air.
3 more elements
Dependencies are inferred from the claim text.