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Press section of a machine for producing a fibrous web

A press section, fiber web technology, applied in the press section, paper machine, papermaking, etc., can solve problems such as limitation and optimization, and achieve the effect of reducing moisture return, high dehydration rate, and high breaking strength

Active Publication Date: 2013-11-20
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time the coat should not leave traces of its pattern, which limits the optimization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Press section of a machine for producing a fibrous web
  • Press section of a machine for producing a fibrous web
  • Press section of a machine for producing a fibrous web

Examples

Experimental program
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Embodiment Construction

[0045] The drawings are described in detail below.

[0046] on the basis of figure 1 In the configuration of 10000, the shoe press nip 8 is formed by the press roll 2 located above and the counter roll 3 located below. The press element 4 shown here only in one piece is pressed against the jacket from the inside by means of a press element not shown, and thus produces an extended press nip. The fibrous web 1 is run through and dewatered at the press nip together with the first felt 5 and the second felt 6 . Due to the special configuration of the grooved jacket of the press roll 2, the water that has been pressed out at the beginning and sprayed back against the direction of web travel is collected in the collecting tank 10.1 and discharged through the outlet 12.1. Possible sprays are sucked by means of the suction 14.1. The collecting trough is pivotable and adjustable by means of adjustment means 15.1 and 16.1. As a result, a precise orientation of the injection or intro...

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PUM

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Abstract

The invention relates to a press section for dewatering in a machine for producing a fibrous web (1), in particular a paper, cardboard, or tissue web, comprising a shoe press nip (8) formed by a press roll (2) and a counter roll (3), wherein the press roll (2) has a circumferential flexible cylindrical surface, a supporting stationary yoke, a pressing element (4), and press-on devices, and wherein the press-on devices press the pressing element (4) against the cylindrical surface (7) and thus the cylindrical surface (7) against the counter roll (3), and wherein a collecting tray (20.1, 20.3, 20.4) is provided downstream of the shoe press nip (8) in the running direction of the web; the cylindrical surface (7) is grooved, wherein the length of the grooves in the circumferential direction is greater than the nip length (L), and a collecting tray (10.1, 10.2, 10.3, 10.4) is provided upstream of the shoe press nip (8) on the side of the press roll (2) so that a large amount of water sprays back from the shoe press nip in a direction opposite the running direction of the web and contributes to the improvement of the dewatering performance.

Description

technical field [0001] The present invention relates to a press section for dewatering in a machine for the manufacture of a fibrous web, in particular a paper, cardboard or tissue web, with a shoe press formed by a press roll and a pair of rolls zone in which the press roll has an annular flexible jacket, a supporting fixed yoke, a press element and a pressing device, and wherein the pressing device compresses the pressing element onto the jacket and thus the jacket against the mating roll. Background technique [0002] The fibrous web is guided through the nip together with the felt or between two felts. The water is pressed from the web into the felt by the pressing force used to press the press roll and the mating roll against each other. [0003] Such a press section is known, for example, from document EP1072721A1, which describes a press section with only one single shoe press nip. According to the description, after the shoe press nip, grooves are provided on the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F3/02D21F3/04
CPCD21F3/045D21F3/086D21F3/0227D21F7/083
Inventor D.格罗尼克U.卢克山德尔
Owner VOITH PATENT GMBH
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