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US 12,006,631 B2Granted
Device and method for producing a fibrous web
AssigneeAndritz Inc.
InventorsBoris Jancic, Lukas Gissing, Stefano Marenco, Klaus Gissing
Life of this patent
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Abstract
A device and a method for producing a pulp web in which the first clothing and the second clothing are wrapped partly round the forming roll and another roll. The pulp web formed is guided between the forming roll and the other roll on the first clothing and the second clothing is guided separately from the first clothing, at least in one section. This enables the pulp web to be produced with low energy consumption and operating costs.
Claims12
A device for producing a pulp web (9), comprising:
- a headbox (1),
- a first clothing run comprising a continuously revolving clothing (4) and first clothing guides, and defining an inside and an outside,
- a second clothing run comprising a second continuously revolving clothing (3) and second clothing guides, and defining an inside and an outside,
- a forming roll (2) disposed on the inside of the first continuously revolving clothing (4),
- at least one other roll (11) disposed on the inside of the first continuously revolving clothing (4),
- an external clothing guide (13), and
- a means for reducing a water load in the second revolving clothing (3) provided between the forming roll (2) and the other roll (11), wherein
- the first continuously revolving clothing (4) is wrapped partly around the forming roll (2) and the other roll (11) with the forming roll (2) and the other roll (11) disposed on the outside of the second continuously revolving clothing (3),
- the second continuously revolving clothing (3) is wrapped partly around the forming roll (2) and the other roll (11),
- the first continuously revolving clothing (4) is disposed between the second continuously revolving clothing (3) and the forming roll (2),
- the first continuously revolving clothing (4) is disposed between the second continuously revolving clothing (3) and the other roll (11) and between the forming roll (2) and the headbox (1) for placing a pulp suspension between the first continuously revolving clothing (4) and the second continuously revolving clothing (3),
- the second clothing run has the external clothing guide (13) positioned between the forming roll (2) and the other roll (11) to guide the second continuously revolving clothing (3) separately from the first continuously revolving clothing (4) in a section between the forming roll (2) and the other roll (11),
- the external clothing guide (13) is disposed on the outside of the second continuously revolving clothing (3),
- the external clothing guide (13) is disposed between the first continuously revolving clothing (4) and the second continuously revolving clothing (3), and
- the water load is reduced in the section of the second continuously revolving clothing (3) that is separately guided between the forming roll (2) and the other roll (11) by the means for reducing a water load.
12 more elements
Dependencies are inferred from the claim text.