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EP1731665B1 - Dispositif de séchage par impact - Google Patents

Dispositif de séchage par impact Download PDF

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Publication number
EP1731665B1
EP1731665B1 EP06111159A EP06111159A EP1731665B1 EP 1731665 B1 EP1731665 B1 EP 1731665B1 EP 06111159 A EP06111159 A EP 06111159A EP 06111159 A EP06111159 A EP 06111159A EP 1731665 B1 EP1731665 B1 EP 1731665B1
Authority
EP
European Patent Office
Prior art keywords
impingement drying
drying arrangement
arrangement according
roll
impingement
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
Application number
EP06111159A
Other languages
German (de)
English (en)
Other versions
EP1731665A1 (fr
Inventor
Roland Mayer
Wolfgang Mayer
Martin-Lars Adalid Damerau
Andreas Hosemann
Peter Kahl
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.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1731665A1 publication Critical patent/EP1731665A1/fr
Application granted granted Critical
Publication of EP1731665B1 publication Critical patent/EP1731665B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • 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 an impingement drying arrangement for a device for producing a fibrous web, in particular paper or board web.
  • the fibrous web along the drying path can be performed at least partially substantially straight or slightly curved.
  • An impingement drying arrangement of this kind is for example in WO 02/36880 described.
  • the invention further relates to a device equipped with such an impingement drying arrangement for producing a fibrous web.
  • the web is first converted into strip form.
  • Such a railway transfer is particularly problematic at high machine speeds.
  • the invention has for its object to provide an improved impingement drying arrangement and an improved apparatus for producing a fibrous web of the type mentioned, in which a reliable strip transfer is ensured even at higher machine speeds.
  • an impingement drying arrangement for a device for producing a fibrous web, in particular paper or board web, with at least one elongated drying section, along which the fibrous web is guided on a wire, at least one laterally adjacent to the drying section arranged on this directed blast hood and at least one suction roll and / or at least one evacuated stabilizer box over which the fibrous web leading screen is guided, wherein at least one such suction roll and / or at least one such besaugter stabilizer box edge narrow, the web transfer serving transfer zone which is besaugbar separated from the over the remaining width extending roller or box area.
  • At least one suction roll and / or at least one evacuated stabilizer box is provided on the edge with a narrow transfer zone serving for the web transfer, which can be swept separately from the roll or box area extending over the remaining width, strip transfer is reliably possible even at high speeds.
  • the transfer zone preferably has a width measured transversely to the web running direction in a range of about 100 to 1000 mm.
  • suction roller or the stabilizer box can be aspirated during the transfer operation only in the region of the transfer zone and in normal operation over the entire width.
  • the screen leading the fibrous web can moreover be guided over at least one support roller.
  • a respective stabilizer box adjoining a roller is sealed laterally or at its two ends as well as at the boundary between the transfer zone and the region extending over the remaining width by means of Teflon shields against the lateral surface of the relevant roller.
  • a respective stabilizer box is sealed laterally or at its two ends as well as at the boundary between the transfer zone and the region extending over the remaining width by means of Teflon shields and / or air knives.
  • a respective stabilizer box can be sealed over the machine width, for example by means of at least one blade against a respective roller.
  • the measured in the web running direction length of a respective stabilizer box is according to a preferred embodiment a maximum of about 2000 mm, preferably at most about 1000 mm.
  • At least one suction roll can be sucked over the jacket of an adjacent stabilizer box.
  • a respective suction roll may also be sucked over the bearing.
  • the roll shell can have larger and / or more bores in the region of the transfer zone than in the region extending over the remaining width.
  • the fibrous web may be guided along the drying path at least in sections substantially straight and / or at least in sections, in particular slightly curved.
  • the fibrous web is guided on a drying wire.
  • the impingement drying arrangement can thus in particular within the Be provided drying section.
  • the arrangement in question is provided before the drying section.
  • the elongated drying section runs at least approximately vertically.
  • two, in particular juxtaposed, elongated, preferably at least approximately vertical, drying sections are provided.
  • the screen leading the fibrous web is passed over a first or upper suction roll and a second or lower suction roll and back again.
  • at least one support roller and / or at least one further suction roller may be provided between the first or upper suction roller and the second or lower suction roller.
  • At least one stabilizer box may be provided between a suction roll and a back-up roll.
  • at least one stabilizer box may also be arranged between two respective support rollers.
  • at least one stabilizer box may also be arranged outside on the first or above the upper suction roll.
  • all stabilizer boxes and / or all suction rolls each have on the edge side a narrow transfer zone serving for the web transfer.
  • the inventive device for producing a fibrous web, in particular paper or board web is characterized in that it is provided with an impingement drying arrangement according to one of claims 1 to 24.
  • this impingement drying arrangement can be provided in particular in or at the beginning of a drying section.
  • a further impingement drying arrangement is preferably provided in the web running direction in front of the impingement drying arrangement, which comprises a rotatable, in particular suctionable, roll whose upper circumferential section is looped around by the fibrous web during operation, and a blower hood arranged above the roll and its wrap area.
  • the two impingement drying arrangements preferably follow one another directly.
  • the two impingement drying arrangements are subsequently arranged on a press section and in particular in front of the first steam-heated drying cylinder.
  • the last sieve of the impingement drying arrangements is guided over at least one, preferably two or three, of the following steam-heated drying cylinders.
  • two suction rolls can be provided. These two suction rolls can each have at the edge a narrow, the web transfer serving transfer zone, which is besaugbar separated from extending over the remaining width roll area.
  • this suction box can at the edge again have a narrow, the web transfer serving transfer zone, which is besaugbar separated from extending over the remaining width roller area.
  • FIG. 1 shows a schematic cross-sectional view of a section of an impingement drying arrangement 10, in which a suction roll 12 and two of these adjacent stabilizer boxes 14 can be seen.
  • the suction roll 12 and the stabilizer boxes 14 each edge of a narrow, the web transfer serving transfer zone 16 which is besaugbar separated from extending over the remaining width roll or box area.
  • a respective transfer zone 16 is separated by a respective partition wall 18 from the rest of the roll or box area.
  • a respective stabilizer box 14 adjoining a roller 12 can be sealed against the lateral surface of the respective roller 12 laterally or at its two ends as well as at the boundary between the transfer zone 16 and the region extending over the remaining width, for example by means of Teflon shields 20.
  • FIG. 2 shows a schematic side view of an embodiment of an impingement drying arrangement 10 with two juxtaposed, at least substantially straight drying sections 22 and a plurality of guide or support rollers 24.
  • the rollers 24 may also be evacuated.
  • the impingement drying arrangement 10 comprises two rotatable suction rolls 12, which are arranged approximately vertically above one another and at a distance from each other and around which a wire 26 runs from top to bottom and back again.
  • the impingement drying assembly 10 is disposed within the dryer section, wherein the screen 26, as shown in the FIG. 2 can be seen, both before and after the impingement drying arrangement 10 is guided in each case via a drying cylinder 32.
  • the fibrous web is thus guided on a drying wire 26.
  • a stabilizer box 14 between the upper suction roller 12 and the subsequent support roller 24 a stabilizer box 14 between two successive support rollers 24 and a stabilizer box between the last support roller 24 and the lower suction roller 12 is arranged.
  • a stabilizer box 14 between two successive support rollers 24 and a stabilizer box between the last support roller 24 and the lower suction roller 12 is arranged.
  • a stabilizer box 14 is provided above the upper suction roll 12.
  • the blast hoods 28 may in particular be hot air hoods.
  • all suction rolls 12 and possibly 24 and all stabilizer boxes 14 at the edge each have a narrow, the web transfer serving transfer zone 16 (see also FIG. 1 ), which can be aspirated separately from the roller or box area extending over the remaining width.
  • the embodiment according to Fig. 3 differs from the according to Fig. 2 essentially only in that the two drying sections 22 are not approximately rectilinear but slightly curved. This is achieved by a corresponding arrangement of the support rollers 24. Instead of these support rollers 24 may in principle be provided again sucked rolls. Due to the slightly curved configuration of the two vertical drying sections 22 whose length can be increased without changing the height of the system.
  • FIG. 4 shows a schematic side view of another embodiment of an impingement drying assembly 10 with two juxtaposed, slightly curved drying sections 22. It differs from the embodiment according to FIG. 3 essentially only in that the curved course of the two vertical drying sections 22 is not achieved by correspondingly arranged support rollers, but by additional suction rollers 34, wherein a respective additional suction roller 34 contacts the screen 26 on the left side as well as on the right side.
  • the additional suction rolls 34 arranged between the upper suction roll 12 and the lower suction roll 12 have a larger diameter than the outer suction rolls 12 just mentioned.
  • the additional suction rolls 34 are preferably each narrow , the web transfer serving transfer zone 16 provided, which is aspirated separately from extending over the remaining width roller area.
  • FIGS. 2 to 4 are associated with each other corresponding parts the same reference numerals.
  • the fibrous web may be straight or slightly curved on a wire 26, e.g. be carried out a drying wire and from the screen 26 side facing away with blast hoods 28, in particular hot air hoods are dried.
  • this impingement drying arrangement 10 is preferably designed so that all stabilizer boxes 14 and all evacuated rolls 12, 34 and possibly 24 have a narrow, separated transfer zone 16, which can be vacuumed separately from the remaining width.
  • the width of the transfer zone is preferably in a range of about 100 to about 1000 mm.
  • the stabilizer boxes may be sealed laterally and at the boundary of the transfer zone against the lateral surface of a respective adjacent roller with Teflon shields. against the sieve, the stabilizer boxes can be sealed laterally and at the border of the transfer zone, in particular with Teflon shields or air knives. Over the machine width, the stabilizer boxes are preferably sealed with blades against the adjacent rollers.
  • the maximum length of the stabilizer boxes in the web running direction is expediently 2000 mm, preferably 1000 mm.
  • Besaugte rolls can be sucked in particular on the jacket of a respective adjacent stabilizer. Alternatively or additionally, the rollers can also be sucked over the bearing. Perforated rolls can have larger and / or more holes in the area of the transfer zone than in the remaining jacket area.
  • a significant advantage of the impingement drying arrangements described above is that a reliable strip transfer is ensured even at higher machine speeds.
  • FIGS. 2 to 4 While in the FIGS. 2 to 4 in each case an impingement drying arrangement 10 arranged inside the dryer section is shown, the FIGS FIGS. 5 to 7 in each case one provided at the beginning of the dryer section impingement drying arrangement 10, which is preceded in each case by a further impingement drying arrangement 36.
  • Fig. 5 shows a section of the apparatus for producing a fibrous web, in which the further impingement drying arrangement 36 of a straight impingement drying arrangement 10 with a plurality of support rollers 24 according to the FIG. 2 upstream.
  • the upstream impingement dryer 36 comprises a rotatable, suctioned roller 38, the upper peripheral portion 40 is looped around in operation by the fibrous web.
  • the suction roll 38 may in particular have a diameter of at least 3 m.
  • a blast hood 42 is arranged, by means of which the fibrous web with drying fluid, in particular hot air can be acted upon.
  • the hot air may have a temperature of about 300 to about 500 ° C.
  • the hot air blowing rate may be about 70 to about 180 m / s.
  • This further impingement drying arrangement 36 is arranged immediately in front of the impingement drying arrangement 10.
  • the two impingement drying arrangements 36, 10 are provided following the press section 44, of which only the last two press rollers 46, the press felts or screens 48 and two guide rollers 50 are shown.
  • the press rollers 46 may in particular form an extended press nip.
  • two suction rolls 52 and a belt 56 circulating about them and around deflection rolls 54 are provided.
  • suction boxes 58 are arranged within the loop of the conveyor belt 56 between the two suction rolls 52.
  • a conveyor belt 60, in particular sieve, out, with pulleys 62 are also present here.
  • the screen 26 of the impingement drying arrangement 10 still wraps around at least one subsequent steam-heated drying cylinder 32.
  • the impingement drying arrangement 10 After the impingement drying arrangement 10 has been arranged in front of the drying section, the latter is omitted here FIGS. 2 to 4 to be recognized front drying cylinder 32.
  • FIG. 5 also still one of the leadership of the screen 26 serving deflection roller 64 to recognize.
  • the fibrous web is successively acted upon on its upper side and on its underside with hot air, whereby a good drying is achieved.
  • the support rollers 24 of the impingement drying arrangement 10 can also be self-evacuated, wherein they may in particular also be grooved and / or drilled. This results in a further improvement of the web guide.
  • the suction rolls 52, 38 as well as the suction boxes 58 can each be provided with a narrow, separate transfer zone.
  • FIG. 6 shows one with the FIG. 5 comparable illustration, wherein the further impingement drying arrangement 36, however, a curved impingement drying arrangement 10 according to FIG. 3 upstream. Moreover, this embodiment has at least substantially the same structure as that of FIG. 5 , wherein corresponding parts are again assigned the same reference numerals.
  • FIG. 7 differs from the according to FIG. 5 essentially in that the further impingement drying arrangement 36 of a curved impingement drying arrangement 10 with a plurality of additional suction rolls 34 according to FIG. 4 upstream. Moreover, this embodiment has at least substantially the same structure as that of FIG. 5 , wherein corresponding parts are again assigned the same reference numerals.

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  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Claims (34)

  1. Dispositif de séchage par impact (10) pour un dispositif de fabrication d'une bande de matière fibreuse, en particulier d'une bande de papier ou de carton, avec au moins une section de séchage allongée (22), le long de laquelle la bande de matière fibreuse est guidée sur une toile (26), au moins une hotte de soufflage (28) disposée latéralement à côté de la section de séchage (22) et orientée vers celle-ci, ainsi qu'au moins un rouleau aspirant (12, 34) et/ou au moins un caisson de stabilisateur sous dépression (14), sur lequel/laquelle est guidée la toile (26) guidant la bande de matière fibreuse, caractérisé en ce qu'au moins un tel rouleau aspirant (12, 34) et/ou au moins un tel caisson de stabilisateur sous dépression (14) présente du côté du bord une étroite zone de transfert, servant au transfert de la bande, qui peut être mise sous dépression séparément de la région du rouleau ou du caisson s'étendant sur le reste de la largeur.
  2. Dispositif de séchage par impact selon la revendication 1, caractérisé en ce que la zone de transfert (16) présente une largeur, mesurée transversalement à la direction de défilement de la bande, comprise dans une plage d'environ 100 à environ 1000 mm.
  3. Dispositif de séchage par impact selon la revendication 1 ou 2, caractérisé en ce que le rouleau aspirant (12, 34) ou le caisson de stabilisateur (14) peut être mis sous dépression uniquement dans la région de la zone de transfert (16) pendant l'opération de transfert et sur toute la largeur en fonctionnement normal.
  4. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que la toile (26) guidant la bande de matière fibreuse est en outre guidée sur au moins un rouleau de soutien (24).
  5. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un caisson de stabilisateur respectif (14) adjacent à un rouleau (12, 32, 24) est rendu étanche latéralement ou à ses deux extrémités, ainsi qu'à la limite entre la zone de transfert et la région s'étendant sur le reste de la largeur, par rapport à la surface latérale du rouleau concerné (12, 34, 24) au moyen de boucliers de téflon (20).
  6. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un caisson de stabilisateur respectif (14) est rendu étanche latéralement ou à ses deux extrémités ainsi qu'à la limite entre la zone de transfert (16) et la région s'étendant sur le reste de la largeur, par rapport à la toile (26) au moyen de boucliers de téflon et/ou de lames d'air.
  7. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un caisson de stabilisateur respectif (14) est rendu étanche sur la largeur de la machine par rapport à un rouleau respectif (12, 34, 24) au moyen d'au moins une lame.
  8. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que la longueur d'un caisson de stabilisateur respectif (14), mesurée dans la direction de défilement de la bande, vaut au maximum environ 2000 mm, de préférence au maximum environ 1000 mm.
  9. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un rouleau aspirant (12, 34) peut être mis sous dépression par l'intermédiaire de l'enveloppe d'un caisson de stabilisateur voisin (14).
  10. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un rouleau aspirant (12, 34) peut être sous dépression par l'intermédiaire du palier.
  11. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu au moins un rouleau aspirant (12, 34), dont la surface latérale est pourvue d'alésages.
  12. Dispositif de séchage par impact selon la revendication 11, caractérisé en ce que la surface latérale du rouleau présente des alésages plus grands et/ou plus nombreux dans la zone de transfert (16) que dans la région s'étendant sur le reste de la largeur.
  13. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande de matière fibreuse est guidée essentiellement en ligne droite, au moins localement, le long de la section de séchage (22).
  14. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande de matière fibreuse est guidée notamment avec une légère courbure, au moins localement, le long de la section de séchage (22).
  15. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande de matière fibreuse est guidée sur une toile de séchage (26).
  16. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que la section de séchage allongée (22) s'étend au moins approximativement en direction verticale.
  17. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu deux sections de séchage allongées (22), de préférence approximativement verticales, placées notamment l'une à côté de l'autre.
  18. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que la toile (26) guidant la bande de matière fibreuse est guidée sur un premier rouleau aspirant, ou supérieur, (12) et sur un deuxième rouleau aspirant, ou inférieur, (12), et de nouveau en retour.
  19. Dispositif de séchage par impact selon la revendication 18, caractérisé en ce qu'il est prévu, entre le premier rouleau aspirant supérieur (12) et le deuxième rouleau aspirant inférieur (12), au moins un rouleau de soutien (24) et/ou au moins un autre rouleau aspirant (34).
  20. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu au moins un caisson de stabilisateur (14) entre un rouleau aspirant (12) et un rouleau de soutien (24).
  21. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu au moins un caisson de stabilisateur (14) entre deux rouleaux de soutien (24).
  22. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu au moins un caisson de stabilisateur (14) entre deux rouleaux aspirants (34).
  23. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un caisson de stabilisateur (14) est disposé extérieurement sur le premier rouleau aspirant, ou au-dessus du rouleau aspirant supérieur, (12).
  24. Dispositif de séchage par impact selon l'une quelconque des revendications précédentes, caractérisé en ce que tous les caissons de stabilisateur (14) et/ou tous les rouleaux aspirants (12, 34) présentent chaque fois du côté du bord une étroite zone de transfert (16) servant pour le transfert de la bande.
  25. Dispositif de fabrication d'une bande de matière fibreuse, en particulier d'une bande de papier ou de carton, comportant un dispositif de séchage par impact (10) selon l'une quelconque des revendications précédentes.
  26. Dispositif selon la revendication 25, caractérisé en ce que le dispositif de séchage par impact (10) est prévu dans ou au début d'une section de séchage.
  27. Dispositif selon la revendication 25 ou 26, caractérisé en ce qu'il est prévu, avant le dispositif de séchage par impact (10) dans la direction de défilement de la bande, un autre dispositif de séchage par impact (36), qui comprend un rouleau rotatif (38), pouvant notamment être mis sous dépression, dont la partie périphérique supérieure (40) est en contact en fonctionnement avec la bande de matière fibreuse, et une hotte de soufflage (42) disposée au-dessus du rouleau (38) et en face de la zone de contact (40) de celui-ci.
  28. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux dispositifs de séchage par impact (10, 36) se suivent immédiatement.
  29. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux dispositifs de séchage par impact (10, 36) sont disposés à la suite d'une section de presse (44) et notamment avant le premier cylindre de séchage chauffé à la vapeur (32).
  30. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la dernière toile (26) des dispositifs de séchage par impact (10, 36) est guidée sur au moins un, de préférence deux ou trois des cylindres de séchage chauffés à la vapeur (32) qui suivent.
  31. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu deux rouleaux aspirants (52) pour le transfert de la bande de matière fibreuse de la section de presse (44) aux dispositifs de séchage par impact (10, 36).
  32. Dispositif selon la revendication 31, caractérisé en ce que les deux rouleaux aspirants (52) présentent respectivement, du côté du bord, une étroite zone de transfert (16) servant au transfert de la bande, qui peut être mise sous dépression séparément de la région du rouleau s'étendant sur le reste de la largeur.
  33. Dispositif selon la revendication 31 ou 32, caractérisé en ce qu'au moins un caisson aspirant (58) est disposé entre les deux rouleaux aspirants (52).
  34. Dispositif selon la revendication 33, caractérisé en ce que le caisson aspirant (58) présente du côté du bord une étroite zone de transfert (16) servant au transfert de la bande, qui peut être mise sous dépression séparément de la région du caisson s'étendant sur le reste de la largeur.
EP06111159A 2005-06-08 2006-03-15 Dispositif de séchage par impact Not-in-force EP1731665B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005026312A DE102005026312A1 (de) 2005-06-08 2005-06-08 Impingement-Trocknungsanordnung

Publications (2)

Publication Number Publication Date
EP1731665A1 EP1731665A1 (fr) 2006-12-13
EP1731665B1 true EP1731665B1 (fr) 2010-09-08

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EP06111159A Not-in-force EP1731665B1 (fr) 2005-06-08 2006-03-15 Dispositif de séchage par impact

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EP (1) EP1731665B1 (fr)
AT (1) ATE480664T1 (fr)
DE (2) DE102005026312A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102007021879A1 (de) 2007-05-10 2008-11-13 Voith Patent Gmbh Pressenanordnung und Maschine zur Herstellung einer Faserstoffbahn
GB201514216D0 (en) 2015-08-12 2015-09-23 Ihod Ltd An apparatus for generating hydrogen

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FI118811B (fi) * 2000-11-06 2008-03-31 Metso Paper Inc Päällepuhalluskuivatusyksikkö ja kuivatusosa

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DE502006007810D1 (de) 2010-10-21
DE102005026312A1 (de) 2006-12-14
ATE480664T1 (de) 2010-09-15
EP1731665A1 (fr) 2006-12-13

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