EP1936028A1 - Machine à papier - Google Patents

Machine à papier Download PDF

Info

Publication number: EP1936028A1
Authority: EP; European Patent Office
Prior art keywords: section; fibrous web; machine according; drying; belt
Prior art date: 2006-12-22
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP07118648A

Other languages

German (de)

English (en)

Other versions

EP1936028B1 (fr

Inventor

Martin-Lars Adalid Damerau

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Voith Patent GmbH

Original Assignee

Voith Patent GmbH

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2006-12-22

Filing date

2007-10-17

Publication date

2008-06-25

2007-10-17 Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH

2008-06-25 Publication of EP1936028A1 publication Critical patent/EP1936028A1/fr

2011-12-14 Application granted granted Critical

2011-12-14 Publication of EP1936028B1 publication Critical patent/EP1936028B1/fr

Status Not-in-force legal-status Critical Current

2027-10-17 Anticipated expiration legal-status Critical

Links

Images

Classifications

- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
- D21F3/045—Arrangements thereof including at least one extended press nip
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air

Definitions

the invention relates to a machine for producing and / or finishing a paper, board, tissue or another fibrous web with a press section for dewatering and a subsequent drying section for drying the fibrous web, wherein the first drying element of the dryer section formed by an impingement section is, in which the fibrous web is subjected to hot air or steam, while the fibrous web is supported on a moving under it dry belt.
Impingement sections with their hot air or steam application are becoming increasingly popular for intensifying drying.
the fibrous web is supported at least in the first impingement section on a lower dry belt.
the object of the invention is therefore to improve the web guide in such arrangements.
the object has been achieved in that the fibrous web is guided by an upper band of the last press nip of the press section to the dry belt of the following, first impingement section and the first impingement section extends approximately horizontally.
the fibrous web between the press and dryer section is always guided by a band in the form of the upper band of the press section or the dry belt. Since the fibrous web is always supported in the press section by a belt or a roller, resulting in this area of the machine a very stable running even at high machine speeds. Nevertheless, this arrangement requires no further band, for example a transfer belt.
the web guide is further supported by the fact that the fibrous web rests on the dry belt and the first impingement section runs horizontally.
the drying belt of the first impingement section should preferably run slightly convexly curved during hot air or steam in the web running direction.
the drying performance of the machine can be significantly increased if the first impingement section is followed by at least one further impingement section, wherein the drying belt of this section should preferably be perpendicular during the hot air or steam application.
the vertical course of the impingement section allows a very space-saving arrangement.
both sides of the fibrous web should be exposed to hot air or steam in the impingement sections.
the basis weight and the dry content of the fibrous web it may be advantageous to take measures that are safe Ensure guidance of the fibrous web after the last press nip on the upper belt of the press section.
the adhesion of the fibrous web can be reinforced at the upper band, if this has a smooth surface at least in the contact region with the fibrous web.
the adhesion of the fibrous web to the upper band can be enhanced by suction means.
the last press nip of the press section is formed by two press rolls pressed against each other, the upper being sucked out.
the upper band after the last press nip is guided past a suction device arranged on the side opposite the fibrous web, which is preferably designed as a suction roll or suction box.
the fibrous web should be passed to the impingement sections for drying over heated drying cylinders.
the press section for dewatering the fibrous web 1 has at least one press nip formed by two press rolls 6, 7 pressed against one another, through which the fibrous web 1 runs together with at least one water-absorbing dewatering belt 5 in the form of a press felt.
the single or last press nip is made extended here, for which reason the lower press roll 7 is formed by a shoe press roll and the upper press roll 6 is cylindrical.
the shoe press roll has a flexible roll shell, which is pressed by a pressing element with concave pressing surface to the cylindrical press roll 6.
an upper belt 2 may be formed differently.
the band 2 has a smooth surface, which enhances the adhesion of the fibrous web 1 to this band 2, so that the fibrous web 1 can be guided after the extended press nip solely from this band 2 to the transfer to a drying belt 3 of the following drying section.
the takeover is supported by a, coiled by the air-permeable drying belt 3, sucked guide roller 9.
the fibrous web 1 is supported in the press section up to the first part of the dryer section of at least one belt 2,3 or a roller, results in a very safe web guide even at very high machine speeds reduced risk of a railway crash. In addition, no additional transfer belt o. ⁇ . Is needed.
the band 2 is impermeable or only slightly permeable.
the upper press roller 6 can be sucked to improve the web guide.
the negative pressure of this press roller 6 additionally supports the adhesion of the fibrous web 1 to the belt 2 immediately after the extended press nip.
the lower dewatering belt 5 can be led away immediately after the extended press nip of the fibrous web 1, which prevents the rewet from this dewatering belt 5 starting.
the air-permeable dry belt 3 of the dryer section leads the fibrous web 1 after being taken over by a first impingement section, in which the fibrous web 1 is subjected to hot air or steam for intensive drying by a blow box 11.
the fibrous web 1 is very stable on the approximately horizontally running under them dry belt 3.
the dry belt 3 wraps in the field of loading partially a plurality of guide rollers 10, wherein in the web running direction 14 results in a slightly convex to the fibrous web 1 curved barrel.
the dry belt 3 passes the fibrous web 1 to a running under the fibrous web 1 drying belt 4 a subsequent impingement section.
the drying belt 4 supports the fibrous web 1 during the application of two blow boxes 11 here.
the drying belt 4 runs from a large, upper Saugleitwalze 12 perpendicular to a large, lower Saugleitwalze 12 and then again perpendicular to the upper Saugleitwalze 12 upwards.
the impingement of the fibrous web 1 takes place, in which case the dry belt 4 is guided over a plurality of guide rollers 10 and there is a curved path to the fibrous web 1.
the drying belt 4 leads the fibrous web 1 alternately over heated drying cylinders 13 and guide rollers of a following drying group.
the upper band 2 is permeable, so that the upper press roller 6 can also be sucked.
cylindrical press rollers 6 can be used.
the fibrous web 1 guided on both sides by the lower dewatering belt 5 and the upper belt 2, runs together to a suction device 8 in the form of a, drawn from the upper belt 2, evacuated guide roller.
the sandwich guide between both belts 2.5 stabilizes the web run considerably.

Landscapes

Paper (AREA)

EP07118648A 2006-12-22 2007-10-17 Machine à papier Not-in-force EP1936028B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102006061106A DE102006061106A1 (de)	2006-12-22	2006-12-22	Papiermaschine

Publications (2)

Publication Number	Publication Date
EP1936028A1 true EP1936028A1 (fr)	2008-06-25
EP1936028B1 EP1936028B1 (fr)	2011-12-14

Family

ID=39203221

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP07118648A Not-in-force EP1936028B1 (fr)	2006-12-22	2007-10-17	Machine à papier

Country Status (3)

Country	Link
EP (1)	EP1936028B1 (fr)
AT (1)	ATE537296T1 (fr)
DE (1)	DE102006061106A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1997013031A1 (fr) *	1995-10-04	1997-04-10	Valmet Corporation	Procede applicable dans une machine a papier et dispositif correspondant
WO2005068713A1 (fr) *	2004-01-15	2005-07-28	Metso Paper, Inc.	Dispositif de machine a papier

2006
- 2006-12-22 DE DE102006061106A patent/DE102006061106A1/de not_active Withdrawn
2007
- 2007-10-17 EP EP07118648A patent/EP1936028B1/fr not_active Not-in-force
- 2007-10-17 AT AT07118648T patent/ATE537296T1/de active

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1997013031A1 (fr) *	1995-10-04	1997-04-10	Valmet Corporation	Procede applicable dans une machine a papier et dispositif correspondant
WO2005068713A1 (fr) *	2004-01-15	2005-07-28	Metso Paper, Inc.	Dispositif de machine a papier

Also Published As

Publication number	Publication date
DE102006061106A1 (de)	2008-06-26
ATE537296T1 (de)	2011-12-15
EP1936028B1 (fr)	2011-12-14

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