EP0763626B1 - Diffuseur de vapeur et procédé de conditionnement par zones d'une bande de papier en mouvement - Google Patents

Diffuseur de vapeur et procédé de conditionnement par zones d'une bande de papier en mouvement Download PDF

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Publication number
EP0763626B1
EP0763626B1 EP96112264A EP96112264A EP0763626B1 EP 0763626 B1 EP0763626 B1 EP 0763626B1 EP 96112264 A EP96112264 A EP 96112264A EP 96112264 A EP96112264 A EP 96112264A EP 0763626 B1 EP0763626 B1 EP 0763626B1
Authority
EP
European Patent Office
Prior art keywords
steam
blower box
roll
box according
air
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.)
Expired - Lifetime
Application number
EP96112264A
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German (de)
English (en)
Other versions
EP0763626A3 (fr
EP0763626A2 (fr
Inventor
Christian Schiel
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0763626A2 publication Critical patent/EP0763626A2/fr
Publication of EP0763626A3 publication Critical patent/EP0763626A3/fr
Application granted granted Critical
Publication of EP0763626B1 publication Critical patent/EP0763626B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/008—Steam showers

Definitions

  • the invention relates to a steam blow box for application from steam to one passed over a roll of a paper machine Paper web, with one running across the web direction of the roller-extending, sealed steam chamber, the Steam can be supplied and the front wall facing the roller has a plurality of steam outlet openings, wherein between the front wall of the steam box and the roller Steam spreading space is formed.
  • Such a steam blow box is from DE 41 25 062 A1 known.
  • steam is supplied via a steam valve placed in a steam blowing chamber, from which the steam over Steam outlet openings enter a steam expansion room can, so as to heat the paper web guided over a roller.
  • Zone-wise tempering of the paper web is a consequence of insulating air layer hardly possible.
  • the object of the invention is therefore a steam blow box to apply steam to one over a roller one To create paper machine guided paper web with which a more sensitive temperature control on the surface of the paper web is possible. Furthermore, the heat transfer to the Paper web can be optimized.
  • a particularly sensitive, zone temperature control on the surface of the paper web made possible by the addition of air an insulating Air layer is generated in front of the roller surface, which creates itself if there is a large excess of steam in the steam expansion chamber, this is a quick responsive and sensitive local influence (reduction) heat transfer to the paper surface is.
  • the outlet channel is a preferred further development of the invention divided into a plurality of separately controllable zones.
  • the width of the roller can be divided into zones heat transfer to the paper web which can be delicately influenced enable, resulting in an optimal adaptation of heat transfer adjust for variations in operating parameters leaves.
  • zones of more or less large amounts of air admixed this has due to the insulating effect of Layers of air that change in the direction of rotation of the roller Place the roller surface, resulting in an immediate Exposure to steam spreading in the steam expansion chamber to those areas that should not be heated as much, is avoided.
  • This is a greatly improved overall zone-by-zone regulation of heat transfer to the surface enables the paper web. A mutual influence neighboring zones, which are controlled differently largely avoided.
  • the zones are connected to separate air supply lines, which control valves arranged outside the steam blow box for Air volume regulation are assigned.
  • suction channel divided into a plurality of separately controllable zones.
  • Zones with separate lines for air removal those control valves located outside the steam box are assigned to air volume regulation.
  • Outlet channel provided a suction channel for suction.
  • the inlet side, the outlet side and the front sides of the steam expansion chamber sealant for sealing the Steam expansion room provided against the roller.
  • the A narrow point is provided transversely to the web running direction be where one wall surface of the steam box to form of a narrow gap protrudes towards the roller.
  • nozzles are preferably shaped and arranged so that they create a steam curtain, the air boundary layers of the roller peels off and this together with excess steam to Suction channel transported on the inlet side.
  • nozzles are preferably shaped and arranged so that they create a steam curtain, the air boundary layers of the roller peels off and this together with excess steam to Suction channel transported on the inlet side.
  • the scraper or the sealing strip is preferably arranged so that sealing against the counter roller is achieved. To this In this way, heating of the counter roll is made possible at the same time. The further the scraper or the sealing strip from the between Roll and counter roll formed gap removed to the outside is, the greater the additional heat transfer to the Counter roll.
  • roller or side surfaces protruding towards the counter roller for sealing of the steam spreading space against the roller or the counter roller intended.
  • zone-by-zone tempering of the current Paper web supports and an even more sensitive, zone by zone controlled tempering enables.
  • Either the gas can be uniform over the width of the Steam spreading room can be suctioned off or the gas extraction be controllable in zones analogous to the air supply.
  • a press section of a paper machine is schematic shown and designated overall by the number 10. It is a so-called "three-nip press", i.e. by one Press with a total of three press nips, a first press nip 12, a second press nip 14 and a third press nip 16, that of an aqueous paper web 24 in the direction of the arrow 26 are run through.
  • the paper web 24 is removed by a take-off suction roll 18
  • Fabric tape 22 is sucked over onto a felt web 20, around a Roller 30 through the first press nip 12 between the roller 30 and a counter roll 28 and through the second press nip 14 is guided between the roller 30 and a counter roller 32.
  • a second also runs through the first press nip 12 Felt web 44, which is guided over guide rollers 36, 38.
  • the third press nip 16 is from the roller 32 and a shoe press roller 34 formed, which is also a shoe press roll with wider Press zone can be, again a felt web 46 through the Press nip 16 is guided, which rotates about guide rollers 40, 42. After passing through the third press nip 16, the paper web leaves the counter roller 32, as indicated by the arrow 48. The circumference of the counter roller 32 is then by a scraper 52 cleaned.
  • a steam blow box according to the invention is arranged, which is generally designated with the number 50.
  • the steam blow box 50 is shown enlarged, further comprising portions of roller 30 and counter roller 32 are recognizable.
  • the roller 30 is designed as a so-called suction roller, one stationary suction box 55 with a plurality of suction zones 54, 56, 58, over which a perforated roller jacket 59 rotates.
  • the steam box 50 which is substantially rectangular Cross-section is in front of the second press nip 14 between the roller 30 and the counter roller 32 and in the manner explained in more detail below on the inlet side 92 of the paper web guided in the direction of arrow 53 over the roller 30 sealed against the roller 30 and on the outlet side 94 of the Paper web sealed against the roller 32.
  • the steam blow box 50 consists of a box-shaped carrier with four walls 62, 64, 66, 68, which extends across the entire width the roller 30 extends and at the end faces over side surfaces 118 is completed, forming a narrow gap along the surface of roller 30 and counter roller 32 run (Fig. 3).
  • the front wall 62 of the steam-blowing chamber facing the roller 30 is in the lower area through a multitude of steam outlet openings 74 perforated (see FIG. 3), through which steam into one Vapor spreading space 76 between the roller 30 and the front wall 62 can occur, the down through a narrow point 90 is limited by the lower wall surface 68 of the Vapor blower box 50 is formed to form a narrow one Gap protrudes toward the roller 30.
  • the steam expansion room 76 is also countered by a scraper 52 or a sealing lip the counter roller 32 sealed at the outer, upper end of the Steam blowing chamber 60 is attached.
  • the vapor blowing chamber 60 is suitably through a Thermal insulation 106 thermally insulated from the outside.
  • Seen in web running direction 53 are immediately after the Constriction 90 distributed over the entire width of the roller 30
  • Steam nozzles 86 arranged one behind the other, which are connected via pipes 88 can be supplied with steam directly from the steam blowing chamber 60.
  • About the steam nozzles 86 is thus immediately behind the Narrow 90 steam blown obliquely against the roller 30, see above that there is practically a seal in the steam expansion chamber 76 downwards through a steam curtain.
  • the tubes 88 for supplying the steam nozzles 86 are inside the steam chamber 60 pulled up a little so that the Inlet openings lie above a condensate drain 80, which runs along the lower wall 68 of the steam chamber 60. Entry of condensate into the pipes 88 is thus avoided.
  • An outlet channel 96 opens below the constriction 90 also extends over the entire width of the roller 30.
  • the outlet channel 96 is - as can be seen from FIG. 3 - in the longitudinal direction into individual zones 96a, 96b, 96c, 96d, 96e, 96f, into which a flow distribution grid 98 Air can be blown in in the form of a perforated plate from individual lines is that at the lower end of the steam chamber 60 as a square Lines 102/1 to 102/30 are shown schematically.
  • the Air supply for a total of 30 in the example shown different lines 102/1 to 102/30 is via valves 104 controlled, each assigned to a line 102/1 to 102/30 are and are attached outside the steam box 50, about in the way that is known from DE 44 02 278 A1.
  • the air supply can thus be passed in the direction of the arrows 100 channel 99 for each of the 30 zones of the outlet channel regulate separately.
  • a suction box 51 is provided below the channel 99, which opens in front of the outlet channel 96 in a suction slot 108, can be sucked through the air via deflection blades 57.
  • a suction channel 112 provided in a suction slot just before the second Press nip 14 opens.
  • the suction channel 112 extends over the entire width of the steam box 50 between the two Side surfaces 118 and is in a total of 30 zones 112a, 112b, 112c, 112d, 112e, 112f, ... divided. Each of these zones is connected to a separate line 114/1 to 114/30 which as square lines above the steam chamber 60 in Fig. 2 are indicated schematically and each on valves 116 are connected outside the steam box 50.
  • the Control of valves 104 and 116 is preferably such that with an increase in the area of the outlet channel 96 amount of air blown in a corresponding increase in the extracted Air volume of the respective zone on suction duct 112 takes place.
  • the steam blower box 50 is operated in the following way:
  • the steam spreading space 76 passes through the inlet side 92 the constriction 90 is shielded from the outside, is additionally sealed by a steam curtain, which by the from the Steam nozzles 86 generated steam is generated.
  • a temperature control or a regulation of the heat transfer amount on the surface of the paper web occurs zone by zone separated over the width of the steam expansion space 76, and that if necessary over the individual zones of the outlet channel 96 separate air is blown against the roller 30. This blown air creates a boundary layer between the steam spreading space 76 and the roller 30 through which one Heat transfer is hindered. Thus, the The amount of air blown in is divided into the transferred air Regulate the amount of heat on the paper web.
  • the suction of the Air / steam mixture takes place at the upper end of the steam expansion space 76 again separated by zones via the suction channel 112, as possible in a single zone on the inlet side 92 additionally introduced amount of air on the discharge side 94 in should be dissipated accordingly.
  • the suction slot 108 upstream of the outlet channel 96 serves only to by one of a uniform suction external influences unaffected separate controllability of the individual zones.
  • the steam spreading space 76 at the top through the scraper 52 is limited against the counter roller 32, results in addition some heating of the counter roller 32, the greater the further away the scraper 52 is from the second press nip 14 is arranged on the counter roller 32.
  • the arrangement of the scraper 52 can be designed variably, which increases the heating the counter roller 32 can influence.

Landscapes

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

Claims (17)

  1. Caisson de soufflage de vapeur pour l'application de vapeur sur une nappe de papier (24) guidée par un rouleau (30) d'une machine à papier, comprenant une chambre de soufflage de vapeur (60) fermée, s'étendant transversalement à la direction d'avance (53) de la nappe le long du rouleau (30), laquelle peut être alimentée en vapeur et dont la paroi avant (62) tournée vers le rouleau (30) présente une pluralité d'ouvertures de sortie de vapeur (74), dans lequel, entre la paroi avant (62) du caisson de soufflage de vapeur (50) et le rouleau (30) est formé un espace de propagation de la vapeur (76), caractérisé en ce qu'il est prévu, pour la régulation de la température, un canal de sortie (96) s'étendant le long de l'espace de propagation de la vapeur (76) transversalement à la direction d'avance de la nappe pour effectuer le mélange de l'air.
  2. Caisson de soufflage de vapeur selon la revendication 1, caractérisé en ce que le canal de sortie (96) est divisé en une pluralité de zones ajustables séparément (96a-f,...).
  3. Caisson de soufflage de vapeur selon la revendication 2, caractérisé en ce que les zones (96a-f,...) sont connectées à des conduites séparées (102/1 - 102/30) pour l'alimentation en air, auxquelles sont associées des soupapes de régulation (104) disposées en dehors du caisson de soufflage de vapeur (50) pour effectuer la régulation de la quantité d'air.
  4. Caisson de soufflage de vapeur selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'il est prévu, du côté de la sortie (94) un canal d'aspiration (112) s'étendant le long de l'espace de propagation de la vapeur (76).
  5. Caisson de soufflage de vapeur selon la revendication 4, caractérisé en ce que le canal d'aspiration (112) est divisé en une pluralité de zones ajustables séparément (112a-f,...).
  6. Caisson de soufflage de vapeur selon la revendication 5, caractérisé en ce que les zones (112a-f,...) sont connectées à des conduites séparées (114/1-114/30) pour l'évacuation de l'air, auxquelles sont associées des soupapes (116) disposées en dehors du caisson de soufflage de vapeur (50) pour effectuer la régulation de la quantité d'air.
  7. Caisson de soufflage de vapeur selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'avant le canal de sortie (96), il est prévu un canal d'extraction par aspiration (108) pour effectuer l'extraction par aspiration.
  8. Caisson de soufflage de vapeur selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'il est prévu, sur le côté d'entrée (92), sur le côté de sortie (94) et sur les côtés frontaux de l'espace de propagation de la vapeur (76) des moyens d'étanchéité (90, 52, 118) contre le rouleau (30) pour étanchéifier l'espace de propagation de la vapeur (76).
  9. Caisson de soufflage de vapeur selon la revendication 8, caractérisé en ce que le caisson de soufflage de vapeur (50) est disposé dans un espace intermédiaire formé avant le rouleau (30) et un contre-rouleau (32), et en ce qu'il est prévu, sur le côté d'entrée (92), des moyens d'étanchéité (90) vers le rouleau (30) et sur le côté de sortie (94) des moyens d'étanchéité (52) vers le contre-rouleau (32).
  10. Caisson de soufflage de vapeur selon la revendication 8 ou 9, caractérisé en ce qu'il est prévu, sur le côté d'entrée (92) transversalement à la direction d'avance de la nappe (53) un point d'étranglement (90), au niveau duquel une face de paroi (68) du caisson de soufflage de vapeur (50) fait saillie vers le rouleau (30) pour former une fente étroite.
  11. Caisson de soufflage de vapeur selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'il est prévu, derrière le point d'étranglement (90), vu dans la direction d'avance de la nappe (53), une pluralité de tuyères (86) pour l'alimentation en vapeur.
  12. Caisson de soufflage de vapeur selon l'une ou plusieurs des revendications 8 à 12, caractérisé en ce qu'il est prévu, sur le côté de sortie (94), un racloir (52) ou une nervure d'étanchéité.
  13. Caisson de soufflage de vapeur selon l'une ou plusieurs des revendications 8 à 12, caractérisé en ce qu'il est prévu, contre le rouleau (30) ou le contre-rouleau (32), des faces latérales (118) faisant saillie vers le rouleau (30) ou le contre-rouleau (32) respectivement, pour étanchéifier l'espace de propagation de la vapeur (76).
  14. Procédé de régulation par zones de la température d'une nappe de papier en mouvement (24) par un espace de propagation de la vapeur (76) tourné vers la nappe de papier (24), dans lequel de la vapeur est alimentée sur la largeur de manière essentiellement répartie uniformément, caractérisé en ce que l'alimentation en air du côté de l'entrée (92) de l'espace de propagation de la vapeur (76) permet de refroidir la nappe de papier par zones.
  15. Procédé selon la revendication 14, caractérisé en ce qu'à proximité du point de pression (14) de deux rouleaux (30, 32), qui forme le côté de sortie de l'espace de propagation de la vapeur (76), du gaz est extrait par aspiration.
  16. Procédé selon la revendication 15, caractérisé en ce que le gaz est extrait par aspiration uniformément sur la largeur de l'espace de propagation de la vapeur (76).
  17. Procédé selon la revendication 15, caractérisé en ce que l'extraction de gaz par aspiration est réglable par zones de manière analogue à l'alimentation en air.
EP96112264A 1995-09-18 1996-07-30 Diffuseur de vapeur et procédé de conditionnement par zones d'une bande de papier en mouvement Expired - Lifetime EP0763626B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19534573 1995-09-18
DE19534573A DE19534573C2 (de) 1995-09-18 1995-09-18 Dampfblaskasten und Verfahren zum zonenweisen Temperieren einer laufenden Papierbahn

Publications (3)

Publication Number Publication Date
EP0763626A2 EP0763626A2 (fr) 1997-03-19
EP0763626A3 EP0763626A3 (fr) 1998-02-04
EP0763626B1 true EP0763626B1 (fr) 2001-06-20

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EP96112264A Expired - Lifetime EP0763626B1 (fr) 1995-09-18 1996-07-30 Diffuseur de vapeur et procédé de conditionnement par zones d'une bande de papier en mouvement

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US (2) US5689897A (fr)
EP (1) EP0763626B1 (fr)
CA (1) CA2185828A1 (fr)
DE (2) DE19534573C2 (fr)

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US6280573B1 (en) 1998-08-12 2001-08-28 Kimberly-Clark Worldwide, Inc. Leakage control system for treatment of moving webs
US6318727B1 (en) 1999-11-05 2001-11-20 Kimberly-Clark Worldwide, Inc. Apparatus for maintaining a fluid seal with a moving substrate
US6314659B1 (en) * 1999-12-14 2001-11-13 Valmet Inc. Device and method for protecting a carrying fabric
FI110627B (fi) 2000-04-06 2003-02-28 Metso Paper Automation Oy Menetelmä höyryn puhaltamiseksi paperirainaa vasten ja paperikoneen höyrylaatikko
US6264795B1 (en) * 2000-06-21 2001-07-24 Abb, Inc. Supercalendar steam shower
US6652273B2 (en) * 2002-01-14 2003-11-25 The Procter & Gamble Company Apparatus and method for controlling the temperature of manufacturing equipment
US7513975B2 (en) * 2003-06-25 2009-04-07 Honeywell International Inc. Cross-direction actuator and control system with adaptive footprint
DE10350158A1 (de) * 2003-10-28 2005-06-02 Voith Paper Patent Gmbh Anordnung zum Schutz einer Vorrichtung zum Aufheizen einer Faserstoffbahn
DE10352980B4 (de) * 2003-11-13 2006-10-12 V.I.B. Systems Gmbh Dampfblaskasten
CA2506235C (fr) * 2004-05-03 2013-12-10 Transphase Technology Ltd. Prechauffeur
FI123582B (fi) * 2010-04-29 2013-07-31 Metso Paper Inc Menetelmä ja laitteisto kuiturainan käsittelemiseksi
CN102296477B (zh) * 2011-09-30 2013-09-04 浙江华邦特种纸业有限公司 压榨脱水增强装置
US10975521B2 (en) 2016-01-28 2021-04-13 Kimberly-Clark Worldwide, Inc. Fibrous web dewatering apparatus and method
CA3095666A1 (fr) 2019-10-15 2021-04-15 Ibs Of America Systeme, systeme de controle, systeme d`inspection et methode de controle et de nettoyage d`une chambre a vapeur

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Also Published As

Publication number Publication date
US5689897A (en) 1997-11-25
DE19534573A1 (de) 1997-03-20
EP0763626A3 (fr) 1998-02-04
US5799411A (en) 1998-09-01
EP0763626A2 (fr) 1997-03-19
DE19534573C2 (de) 2001-08-23
CA2185828A1 (fr) 1997-03-19
DE59607120D1 (de) 2001-07-26

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