EP1741828B1 - Machine pour la fabrication d'une bande - Google Patents
Machine pour la fabrication d'une bande Download PDFInfo
- Publication number
- EP1741828B1 EP1741828B1 EP06114296A EP06114296A EP1741828B1 EP 1741828 B1 EP1741828 B1 EP 1741828B1 EP 06114296 A EP06114296 A EP 06114296A EP 06114296 A EP06114296 A EP 06114296A EP 1741828 B1 EP1741828 B1 EP 1741828B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drying
- machine according
- additional
- drying unit
- web
- Prior art date
- 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.)
- Not-in-force
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Classifications
-
- 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
Definitions
- the invention relates to a machine for producing a material web, in particular paper or board web, comprising a drying section comprising at least one drying cylinder, through which the material web is guided by means of at least one circulating belt, and with at least one additional drying unit arranged below or above the drying section the material web is guided by means of at least one additional circulating belt.
- the dryer section accounts for a large part of the space requirement of a paper machine. Consequently, the expansion of the capacity of an existing system is possible only with considerable conversion effort and in accordance with existing space.
- Paper machines of the type mentioned are, for example, in the publications US 6,003,241 and WO 02/36880 A1 described. In these documents is proposed to install over or under the existing dryer section more drying units to increase the drying performance. However, the relevant embodiments have their limits in the drying performance increase and in the maximum speed.
- EP0640717 A2 discloses a single-row dryer section with conventional dryer groups, wherein in the upper row drying cylinders for the contact drying and guide rollers or guide cylinder in the lower row are provided. There are provided drying modules within and / or between the drying groups, which are arranged so that the side of the paper web opposite the side dried by the contact drying comes into contact with the heated cylinder surface of the drying modules.
- the drying capacity should be achieved by a large wrap, as well as by a larger diameter of the cylinders of the drying modules.
- the invention has for its object to provide an improved machine of the type mentioned in which the aforementioned disadvantages are eliminated. In this case, a significant increase in the drying performance of the dryer section is to be achieved without major intervention in the existing system in particular.
- this object is achieved by a machine for producing a material web, in particular paper or board web, with a drying section comprising at least one drying cylinder, through which the material web is guided by means of at least one circulating belt, and with at least one additional drying unit arranged below or above the drying section, through which the material web is guided by means of at least one additional circulating belt, wherein the additional drying unit steam-heated and at least comprises a steam-heated drying cylinder.
- the additional drying unit has at least two fabrics each formed by an additional circulating belt and that a printing medium presses the belts and the material web against the drying cylinder.
- the additional circulating belt is expediently formed by a covering associated with the additional drying unit.
- the material web is preferably guided together with the additional circulating belt around the drying cylinder of this additional drying unit.
- the web of material between the drying cylinder of the additional drying unit and the additional band is guided lying around the drying cylinder. This ruled out even at higher machine speeds and belt speeds that the material web is released as a result of centrifugal forces from the curved, rotating support surface.
- the drying cylinders of the dryer section are steam-heated, so that in the present case for the additional drying unit no additional Energy form is needed. This proves to be particularly advantageous in conversions, since the corresponding steam is already available.
- the additional drying unit has a common clothing with the dryer section.
- the additional drying unit may e.g. have two or three each formed by an additional circulating belt strings.
- the additional drying unit has, for example, two coverings, preferably one of the two coverings is a dense band and the other a fine sieve. It can be advantageously formed by one circulating particular combined band and the other by a circumferential fine screen belt also one of the two clothing. According to an alternative expedient embodiment, one of the two coverings is formed by a circumferential dense band and the other by a circulating, in particular combined band.
- a covering is advantageously formed by a circumferential dense band, a covering by a circumferential coarse screening band, and a covering by a revolving fine sieve band.
- the additional drying unit is advantageously provided with a separate housing or a separate drying hood.
- the additional drying unit and at least one drying cylinder of the dryer section is associated with a common housing or a common dryer hood.
- At least one additional drying unit is preferably arranged in the area of the cellar. With the arrangement of the additional drying unit in the basement, at least part of the rebuilding and assembly work can also be done during operation of the system or machine.
- the additional drying unit is arranged with a pressure hood above the dryer section.
- the additional drying unit can be bypassed.
- At least one additional drying unit is arranged in the region of the pre-drying section.
- at least one additional drying unit may also be arranged in the area of the after-dryer section.
- the total drying capacity of the system or machine is significantly increased.
- this drying capacity increases with a "BoostDryer” by about 5 to about 25% and with two to four “BoostDryer” by, for example, about 10 to about 60%.
- BoostDryer by about 5 to about 25%
- BoostDryer by two to four "BoostDryer” by, for example, about 10 to about 60%.
- a remedysiebsaugwalze can be used in particular as a suction roll.
- a roller which stabilizes both the course of the web in one direction and the course of the web in the other direction is provided.
- one of the conventional drying cylinders can be removed from the drying section of the existing system or machine and replaced by a remedysiebsaugwalze or a so-called "Duostabiwalze".
- the run of the material web can alternatively be looped over the additional drying unit or "BoostDryer” or past it, so that any maintenance work on the additional drying unit (BoostDryer) can be carried out independently of the original dryer section.
- BoostDryer additional drying unit
- the BoostDryer unit is at a standstill or fails, the operation of the system can be maintained ("Fall Back").
- BoostDryer or additional drying unit can also be operated continuously and together with the drying cylinders of the dryer section via one and the same drying wire.
- BoostDryer technology also has a positive effect on the paper quality and, depending on the arrangement, mainly results in a higher strength, especially when used at low dry content, ie further up, or mainly better Smoothness especially when used at higher dry content, ie further back.
- At least one additional drying unit is arranged in the front region of the drying section viewed in the web running direction.
- At least one additional drying unit is expediently arranged in the region of the front half of the dryer section and preferably in the region of the front third of the dryer section.
- At least one additional drying unit is advantageously arranged in the rear region of the drying section viewed in the web running direction.
- at least one additional drying unit is provided in the region of the rear half of the drying section, wherein preferably at least one additional drying unit is arranged in the region of the rear third of the drying section.
- a respective additional drying unit comprises at least two drying cylinders.
- the drying cylinders of the additional drying unit are advantageously assigned at least one common fabric. If a plurality of coverings are provided, then advantageously all the coverings for the different ones in the drying cylinder of a respective additional drying unit can be jointly provided.
- the drying section advantageously comprises at least one single-row drying group and / or at least one two-row drying group.
- the transfer of the material web or the edge strips is advantageously carried out by means of a cable guide or a fibron band, which is essentially an evacuated, air-permeable belt, which supports the guidance of the edge strip.
- a closed web guide is provided, with guide elements which operate with negative or positive pressure, and with a Duostabilisatorwalze, suction roll or suction and blowing elements, which direct the web in the desired direction.
- the guide elements should be used both in closed and open web guide.
- the Duostabilisatorwalze is a kind of suction box for aspirating a guide roller in the dryer group.
- Fig. 1 shows a schematic partial view of the drying section 10 of a machine for producing a material web, which may be in particular a paper or board web.
- the drying section 10 comprises a plurality of drying cylinders 12, which are combined into different drying groups.
- the drying groups to be recognized are each two-row drying groups, each drying group having two coverings 14, 16 (cf. Fig. 2 ), one for the upper drying cylinder row and the other for the lower drying cylinder row.
- the various fabrics 14, 16 of the dryer section 10 may each be formed in particular by a dryer fabric. Accordingly, the material web is guided through the dryer section 10 by means of these coverings 14, 16 or dryer fabrics of the various dryer groups.
- the drying section 10 comprises a pre-drying section 20 and a post-dryer section 22nd
- an additional drying unit 24 is provided below the dryer section 10 in the region of the pre-dryer section 20, which is installed here in the basement 26.
- the web is guided by two additional circulating belts 28, 30 through the additional drying unit 24.
- These two bands 28, 30 are therefore provided separately from the clothing 14, 16 of the dryer section 10.
- these two fabrics or circulating belts 28, 30 of the additional drying unit 24 are formed for example by screen belts.
- the additional drying unit 24 comprises a drying cylinder 32.
- the material web is thus guided around this drying cylinder 32 together with the two additional circulating belts 28, 30.
- the web of material thus touches the drying cylinder 32.
- the circulating belt 30 lies in the region of the drying cylinder 32 within the circulating belt 28.
- the additional drying unit 24 like the drying cylinders 12 of the drying section 10, is steam-heated.
- the additional drying unit 24 is provided with a separate drying hood 34.
- a suction roll for transferring the material web from the drying section 10 to the additional drying unit 24 and / or vice versa, a suction roll, in particularrsiebsaugwalze 36 may be provided.
- a roller 36 duotabi roller which stabilizes both the course of the web in one direction and the course of the web in the other direction is also conceivable.
- the two circulating belts 28, 30 of the additional drying unit 24 are guided over guide rollers 38 and 40, respectively.
- the circulating belt 28 is deflected in the region of a left upper guide roller 38 'to the drying cylinder 32 out.
- the tape 30 also runs on the drying cylinder 32.
- the web runs from the last drying cylinder 12 of a preceding dryer group 42 on thekowskisiebsaugwalze or Duostabiwalze 36 to an upper guide roller 40 'of the belt 30, in the area it is taken from this revolving belt 30 and the drying cylinder 32 is supplied.
- the in the area of the guide roller 38 "from the drying cylinder 32 again removed web is guided by the circulating belt 30 into the region of an upper, near thekowskisiebsaugwalze or Duostabiwalze 36 guide roller 40", from which they are fed through thekowskisiebsaugwalze or Duostabiwalze 36 the first drying cylinder 12 a subsequent drying group 44 of the dryer section 10 is supplied.
- a plurality of additional drying units can be provided below the drying section.
- one or more additional drying units can also be used above the drying section.
- the additional drying units can be provided, for example, in the area of the pre-drying section and / or also in the area of the after-dryer section.
- the additional drying units can be installed individually or in groups. For example, additional drying units each having only one or more drying cylinders are conceivable.
- Fig. 3 shows a schematic partial view of the drying section 10 a with the embodiment according to Fig. 1 comparable further exemplary embodiment of the machine.
- a further drying unit 24 provided in the cellar 26 below the drying section 10 is provided which is arranged here in the area of the after-dryer section 22.
- this embodiment has at least substantially the same structure as that of Fig. 1 , Corresponding parts are assigned the same reference numerals.
- Fig. 4 shows a schematic representation of the drying section 10 a with the embodiment according to Fig. 3 comparable further exemplary embodiment of the machine.
- the additional drying unit 24 arranged in the region of the pre-drying section 20 comprises two drying cylinders 32.
- Fig. 5 shows in an enlarged view again arranged in the pre-drying section 20 additional drying unit 24 and the overlying dryer section.
- the two fabrics or circulating belts 28, 30, the two drying cylinders 32 of the additional drying unit 24 in common, ie these bands 28, 30 are both considered in the web running direction considered first and in the web running direction second drying cylinder 32.
- the running of the first drying cylinder 32 belts 28, 30 are initially deflected horizontally by guide rollers 38 and 40 and supplied via a respective horizontal distance in the second drying cylinder 32 provided guide rollers 38 and 40, respectively, in the field of relevant Guide roll 38, 40 to be given to the second drying cylinder 32.
- the material web is fed through this lower clothing 16 via thekowskisiebsaugwalze or Duostabiwalze 36 and two further guide rollers 52 to the second drying cylinder 12 of the subsequent drying group 44.
- this embodiment for example, at least substantially the same structure as that of Fig. 4 have. Corresponding parts are assigned the same reference numerals.
- Fig. 6 shows a schematic partial view of the drying section 10 of another exemplary embodiment of the machine. It differs from the embodiment according to Fig. 3 essentially only in that the two additional drying units 24 are not installed below the drying section 10 or in the basement 26, but above the drying section 10 or the relevant dryer groups. Corresponding parts are again assigned the same reference numerals.
- the additional drying units 24 thus also comprise only one drying cylinder 32 here.
- Fig. 7 shows a schematic partial view of the drying section 10 a with the embodiment according to Fig. 6 comparable further exemplary embodiment of the machine.
- the additional drying unit 24 in the area of the pre-drying section 20 again comprises two drying cylinders 32.
- Fig. 8 shows in enlarged scale again the front additional drying unit 24 of the embodiment according to Fig. 7 and the underlying dryer section section.
- the material web is supplied from the first lower drying cylinder 12 of the subsequent drying group via thezelsiebsaugwalze or Duostabiwalze 36 to the first drying cylinder 32 of the additional drying unit 24 here.
- the further band 46 of the embodiment according to Fig. 5 is not required in the present case.
- the running of the second drying cylinder 32 material web is guided into the region of a arranged in the vicinity ofkowskisiebsaugwalze or Duostabiwalze 36 guide roller 40, from which they fed via thekowskisiebsaugwalze or Duostabiwalze 36 the second lower drying cylinder 12 of the dryer section becomes.
- this embodiment for example, at least substantially the same structure as that of Fig. 7 , Corresponding parts are again assigned the same reference numerals.
- the web running direction generally runs from left to right.
Landscapes
- Drying Of Solid Materials (AREA)
- Paper (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Claims (34)
- Machine pour la fabrication d'une bande de matériau, en particulier d'une bande de papier ou de carton, avec une partie de séchage (10) comprenant au moins un cylindre de séchage (12), à travers laquelle la bande de matériau est guidée au moyen d'au moins une bande sans fin (14, 16), et avec au moins une unité de séchage supplémentaire (24) disposée en dessous ou au-dessus de la partie de séchage (10), à travers laquelle la bande de matériau est guidée au moyen d'au moins une bande sans fin supplémentaire (28, 30), dans laquelle l'unité de séchage supplémentaire (24) est chauffée à la vapeur et comprend au moins un cylindre de séchage (32) chauffé à la vapeur, caractérisée en ce que l'unité de séchage supplémentaire (24) présente au moins deux brins formés chacun par une bande sans fin supplémentaire (28, 30) et en ce qu'un fluide sous pression presse les bandes et la bande de matériau contre le cylindre de séchage.
- Machine selon la revendication 1, caractérisée en ce que la bande sans fin supplémentaire (28, 30) est formée par un brin associé à l'unité de séchage supplémentaire (24).
- Machine selon la revendication 1 ou 2, caractérisée en ce que la bande de matériau est guidée autour du cylindre de séchage (32) de l'unité de séchage supplémentaire (24) en même temps que la bande sans fin supplémentaire (28, 30).
- Machine selon la revendication 3, caractérisée en ce que la bande de matériau est guidée autour du cylindre de séchage (32) en étant située entre le cylindre de séchage (32) de l'unité de séchage supplémentaire (24) et la bande supplémentaire (28, 30).
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de séchage supplémentaire (24) possède un brin commun avec la partie de séchage.
- Machine selon la revendication 5, caractérisée en ce que l'unité de séchage supplémentaire (24) présente deux brins (28, 30).
- Machine selon la revendication 1 ou 6, caractérisée en ce qu'un des deux brins est une bande étanche et l'autre est un tamis fin.
- Machine selon la revendication 1 ou 6, caractérisée en ce qu'un des deux brins (28, 30) est formé par une bande sans fin, en particulier une bande combinée, et l'autre est formé par une bande sans fin de tamis fin.
- Machine selon la revendication 1 ou 6, caractérisée en ce qu'un des deux brins (28, 30) est formé par une bande étanche sans fin et l'autre est formé par une bande sans fin, en particulier une bande combinée.
- Machine selon la revendication 1, caractérisée en ce que l'unité de séchage supplémentaire (24) comprend trois brins.
- Machine selon la revendication 10, caractérisée en ce qu'un brin est formé par une bande étanche sans fin, un brin est formé par une bande sans fin de tamis grossier et un brin est formé par une bande sans fin de tamis fin.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de séchage supplémentaire (24) est pourvue d'un boîtier séparé ou d'une hotte de séchage séparée (34).
- Machine selon l'une quelconque des revendications 1 à 11, caractérisée en ce qu'un boîtier commun ou une hotte de séchage commune est associé(e) à l'unité de séchage supplémentaire (24) et à au moins un cylindre de séchage (12) de la partie de séchage (10).
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région de la cave (26).
- Machine selon la revendication 1, caractérisée en ce que l'unité de séchage supplémentaire avec une hotte sous pression est disposée au-dessus de la partie de séchage.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de séchage supplémentaire (24) peut être contournée.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région de la partie de préséchage (20).
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région de la partie de post-séchage (22).
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un rouleau aspirant (36) pour le transfert de la bande de matériau de la partie de séchage (10) à l'unité de séchage supplémentaire (24) et/ou inversement.
- Machine selon la revendication 19, caractérisée en ce qu'il est prévu comme rouleau aspirant un rouleau aspirant de criblage à sec (36).
- Machine selon l'une quelconque des revendications 1 à 19, caractérisée en ce qu'il est prévu un rouleau (36) stabilisant aussi bien le trajet de la bande dans une direction que le trajet de la bande dans l'autre direction, pour le transfert de la bande de matériau de la partie de séchage (10) à l'unité de séchage supplémentaire (24) et inversement.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région antérieure, considérée dans la direction de défilement de la bande, de la partie de séchage (10).
- Machine selon la revendication 22, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région de la moitié antérieure de la partie de séchage (10).
- Machine selon la revendication 23, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région du tiers antérieur de la partie de séchage (10).
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région postérieure, considérée dans la direction de défilement de la bande, de la partie de séchage (10).
- Machine selon la revendication 25, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région de la moitié postérieure de la partie de séchage (10).
- Machine selon la revendication 26, caractérisée en ce qu'au moins une unité de séchage supplémentaire (24) est disposée dans la région du tiers postérieur de la partie de séchage (10).
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de séchage supplémentaire (24) comprend au moins deux cylindres de séchage (32).
- Machine selon la revendication 28, caractérisée en ce qu'au moins un brin commun (28, 30) est associé aux cylindre de séchage (32) de l'unité de séchage supplémentaire (24).
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie de séchage (10) comprend au moins un groupe de séchage à une rangée.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie de séchage (10) comprend au moins un groupe de séchage (42, 44) à deux rangées.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un guidage par câble ou un convoyeur Fibron pour le transfert de la bande de matériau ou de la zone de bord.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un guidage de bande fermé, avec des éléments de guidage, qui travaillent avec une dépression ou une surpression, ainsi qu'avec un rouleau stabilisateur duo, un rouleau aspirant ou des éléments d'aspiration et de soufflage, qui dévient la bande de matériau dans la direction désirée.
- Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu une aspiration de la buée ou des dispositifs de soufflage, qui facilitent l'évaporation de l'humidité hors de la bande de matériau ou du brin.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005031619A DE102005031619A1 (de) | 2005-07-06 | 2005-07-06 | Maschine zur Herstellung einer Materialbahn |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1741828A1 EP1741828A1 (fr) | 2007-01-10 |
EP1741828B1 true EP1741828B1 (fr) | 2009-05-06 |
Family
ID=36932131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06114296A Not-in-force EP1741828B1 (fr) | 2005-07-06 | 2006-05-22 | Machine pour la fabrication d'une bande |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1741828B1 (fr) |
AT (1) | ATE430834T1 (fr) |
DE (2) | DE102005031619A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010064297A1 (de) | 2010-12-29 | 2012-07-05 | Voith Patent Gmbh | Trockenpartie einer Maschine zur Herstellung einer Faserstoffbahn |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI98229C (fi) | 1993-08-23 | 1997-05-12 | Valmet Paper Machinery Inc | Paperikoneen kuivatusosa |
FI103999B (fi) | 1997-04-22 | 1999-10-29 | Valmet Corp | Kuivatusyksikkö ja niitä soveltava kuivatusosa |
FI118811B (fi) | 2000-11-06 | 2008-03-31 | Metso Paper Inc | Päällepuhalluskuivatusyksikkö ja kuivatusosa |
-
2005
- 2005-07-06 DE DE102005031619A patent/DE102005031619A1/de not_active Withdrawn
-
2006
- 2006-05-22 EP EP06114296A patent/EP1741828B1/fr not_active Not-in-force
- 2006-05-22 AT AT06114296T patent/ATE430834T1/de active
- 2006-05-22 DE DE502006003653T patent/DE502006003653D1/de active Active
Also Published As
Publication number | Publication date |
---|---|
DE102005031619A1 (de) | 2007-01-11 |
ATE430834T1 (de) | 2009-05-15 |
DE502006003653D1 (de) | 2009-06-18 |
EP1741828A1 (fr) | 2007-01-10 |
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