EP0647286B1 - Cylindre chauffant - Google Patents

Cylindre chauffant Download PDF

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Publication number
EP0647286B1
EP0647286B1 EP94914416A EP94914416A EP0647286B1 EP 0647286 B1 EP0647286 B1 EP 0647286B1 EP 94914416 A EP94914416 A EP 94914416A EP 94914416 A EP94914416 A EP 94914416A EP 0647286 B1 EP0647286 B1 EP 0647286B1
Authority
EP
European Patent Office
Prior art keywords
roller
condensate
roll
heating
set forth
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
EP94914416A
Other languages
German (de)
English (en)
Other versions
EP0647286A1 (fr
Inventor
Heinz-Michael Zaoralek
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.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
Schwaebische Huettenwerke Automotive 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 Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Publication of EP0647286A1 publication Critical patent/EP0647286A1/fr
Application granted granted Critical
Publication of EP0647286B1 publication Critical patent/EP0647286B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00—Elements specially adapted for movement
    • F28F5/02—Rotary drums or rollers
    • 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
    • D21F5/022—Heating the cylinders
    • D21F5/028—Heating the cylinders using steam
    • 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
    • D21F5/10—Removing condensate from the interior of the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0253—Heating or cooling the rolls; Regulating the temperature
    • D21G1/0266—Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid

Definitions

  • the invention relates to a heating roller for web-like materials, in particular Paper, with a cylindrical roller body and at least one, preferably two flange journals, each with opposite ends of the cylindrical Roller body are connected. At least one feed or discharge for one Heating medium runs through at least one of the flange pins.
  • the heating medium water vapor in particular, is approximated by at least one axially parallel, preferably peripheral bore or line through the heating roller passed through.
  • the bores or lines are preferably with at least one Connection space, or at least one connection line with the supply and discharge lines connected.
  • Such heating rollers are often rolls with a more or less massive Roll body in which a large number of axial bores mostly close to the Roll surface, i.e. peripherally, are introduced, a heating medium this flows through peripheral holes and lines and its thermal energy to the Walls of the holes or lines and thus gives off to the roller surface.
  • Another type of roller has a tubular roller body, in which the Heating medium is passed through the hollow interior of the roller body and its Releases thermal energy to the inside of the roller body.
  • Heating rollers A significant difference between these two known types of Heating rollers consists in the fact that the first-mentioned heating roller type is for liquid Heating media such as some water and thermal oil can be used for a particularly advantageous heat transfer medium, namely water vapor, so far not in Came into consideration.
  • liquid Heating media such as some water and thermal oil
  • thermal oil can be used for a particularly advantageous heat transfer medium, namely water vapor, so far not in Came into consideration.
  • the known heating roller of the first type would have to be in this case are braked so far that the centrifugal or centrifugal forces no longer sufficient to retain the water in the holes or pipes. in the In extreme cases, a known roller of this type would even have to be used in the Standstill be moved to at least the condensate coming from the above To let holes run out. It is clear that both during the constipation process as well as during the subsequent braking and emptying processes in any case, situations occur that lead to such a heating roller is heated unevenly, so that irregular Temperature profiles occur along the heating roller, which are too thermal Deformations and tension etc. lead.
  • the former roll has one over the roll of the other type significant cost advantage, namely in that the heating rollers of the other type have a very large cavity in the roller body, and therefore in many countries, e.g. the USA, particularly complex acceptance conditions subject because they are considered pressure vessels.
  • the water vapor pressure at a temperature of approx. 211 ° C is approximately 20bar and at a temperature of approx. 249 ° C is approximately 40bar.
  • these apply elaborate acceptance conditions not for containers that have an inner diameter of less than 6 inches, namely less than approx. 152.4 mm, with the Definition of the container of each of the individual axial bores or lines of this Roller type is viewed as a single container.
  • the e.g. release supercalenders must be relatively high, namely up to approx. 450 or even 500 kN / M and in individual cases beyond, must be used as the material for the Steel heating rollers to be used, especially for reasons of heat transfer on the paper the roller wall must be kept as thin as possible.
  • the Roll wall made of steel can also be surface hardened. With that, however in connection with the special acceptance conditions the manufacturing effort increased for heating rollers of the other type.
  • FR-A-1 318 133 shows a roller composed of several segments according to the preamble of claim 1, in the water vapor is introduced to heat the roll surface.
  • the steam gets close via lines to axially parallel or peripheral lines the roller shell.
  • the leads to the axially parallel lines are only on the one end of this known roller is formed while on the opposite Extended pipes are provided at the end of the roller and are intended to To drain condensate.
  • water vapor is available in every conventional paper mill, so that at one direct steam heating to an additional heating station with heat exchanger Conversion of steam energy into hot water and to a separate one Circulation pump for the heating medium can be dispensed with.
  • the main advantage of the first roller can now be that namely the bores are very close to the roll surface, so that the heat transfer is very cheap, with the favorable purchase conditions are linked because the holes have a smaller inner diameter than 6 inches or 152.4 mm, so that the steam-carrying holes can no longer be regarded as a pressure vessel, mostly on the In connection with the difficult purchase conditions used expensive steel can be dispensed with and switched to cheaper cast iron.
  • the roller according to the invention delivers a at a predetermined steam temperature far higher surface temperature than a displacement roller, i.e. a roller of the type.
  • water vapor is up to pressures of about 10 bar, i.e. about 180 ° C, almost always available and therefore unproblematic.
  • the amount of condensate present in the roller according to the invention is also extreme low, so that, even compared to a correspondingly heated displacement roller, the hazard potential of the roller according to the invention is low.
  • controllability of the heating power of the heating roller according to the invention is extreme variable and adjustable from zero to a maximum heating output, after which will be discussed in more detail below.
  • the sealing heads required for the heating roller according to the invention for the Flange connections can be made much smaller because, among other things, the Condensate accumulation at a heating output of 100 kW only approx. 3 l per minute is.
  • it is not necessary to use the dynamic sealing heads Pressure of a pump arranged within a circuit for a heating medium is to burden additional. Ultimately, no additional energy expenditure the movement of the heating medium is required for heating.
  • the heating roller according to the invention can be used at very high temperatures correspondingly high pressures are realized. Because sealing heads available temperatures of up to 17 bar, temperatures around 207 ° C can be easily put into practice.
  • each of the collection rooms is over a drain, for example in the form of at least one hole or at least one tube, connected to a discharge opening for the condensate.
  • This discharge opening for the condensate can with the supply or discharge for the water vapor should be identical, but should in any case in the end areas of the Heating roller and in particular through one or both flange pins of the heating roller be provided.
  • roller bodies can preferably be axially parallel, as a rule centric bore through the roller body through which the Water vapor to the other end of the heating roller, or of the roller body is passed so that from both sides of the roller body can apply even amounts of steam at a uniform temperature.
  • the temperature of the heating roller according to the invention is advantageously above the The flow rate of the condensate is regulated. Such regulation can be make a valve device outside the heating roller according to the invention could be ordered itself.
  • roller according to the invention it is not possible for the roller according to the invention to supply the steam easy to throttle, but the above-mentioned regulation of the Condensate drainage via a valve located outside the roller, the possibility of the roll temperature continuously over the entire temperature range up to to regulate the maximum operating temperature of the heating roller according to the invention.
  • the holes fill near the roller surface are arranged, increasingly with water, which is not or only is derived in part. In this way, the one held in the bores Amount of water, and the free surface of the holes, which the heat from the can take up condensing steam decreases. In this way, the Roll with increasing amount of condensate in the holes absorb less heat, so that the heating power of the invention Roller is possible by regulating the amount of condensate flowing off.
  • the holes can create slopes for the condensate also be slightly inclined from the center outwards. The holes can either towards the center of the roll approx. 1 to 10 mm from the axial parallelism deviate or also run exactly axially parallel.
  • At least one of the collecting spaces advantageously has at least one End of holes a rounded bag with a diameter of preferably is smaller than the diameter of the peripheral bore, the pocket can be offset from the peripheral bore to the outside. This can prevent that in the holes near the Condensate on the roller surface if centrifugal forces cease, that act on the condensate in a surge from the holes in the upper area of the roller through the steam feed Connection lines or connection holes in the holes of the flows lower region of the roller according to the invention.
  • the at least substantially axially parallel peripheral Drill holes like this in the collection rooms or pockets pass that in the operating state there are no obstacles for the Drilling holes in the collecting space or pocket result in condensate flowing.
  • connection to the drain for example in the form of at least one hole or at least one tube can be provided in such a way that there is no condensate jam here either can form. So should be within the drain lines through which Condensate must pass, essentially no restriction on the condensate flow surrender.
  • the roller designed according to the invention can be used not only for those already above release supercalender listed, but also in so-called gloss or soft calenders, in which one or more plastic-coated rolls Press paper web against a heated roller, taking the surface temperatures usually do not have to be higher than approx. 160 to 170 ° C.
  • the outstanding advantage of the roller according to the invention lies, as already above indicated that in each of the holes and at every point of the holes or the roller body an almost identical vapor pressure and thus almost the temperature is the same. Even the slightest temperature deviations along a hole or along the roller body cause that at this point more and more steam condenses, with condensation a large part of its energy emits, and thus the temperature is adjusted again at this point. On Neighboring points condense far less steam, making it too cold Area is automatically heated.
  • the heating roller designed according to the invention is generally characterized by the Reference number 10 marked.
  • the roller has a flange pin 12, preferably on each side, and a cylindrical roller body or Roller jacket 14, the surface 11 for pressure processing a web-like Material, especially paper, plastic or the like., Is used. Steam is via a through the flange 12 supply line in the heating roller 10 according to the invention introduced.
  • the incoming water vapor introduced in connecting lines 24, and part of the via the 36th Introduced water vapor is via an axially parallel, in the central area of the roller 10 according to the invention arranged line 20 to the other end of the Heating roller 10 out.
  • the water vapor arrives via the connecting line 24 the collecting space 28, in which during operation of the invention Heating roller 10, so if sufficient centrifugal forces occur, steam condensate can accumulate.
  • the collecting space 28 adjoins the at least approximately, preferably in the substantially exactly axially parallel bores 16. One each Collection space 28 is assigned to a bore 16.
  • the collecting space 28 is in the via fastening means 32 the roller body 14 connected flange 12 is provided.
  • the roller body 14 connected flange 12 is provided.
  • the plenum 28 is axial to the central axis of the associated bore 16 transferred. This is to prevent that the condensate during the Slow running or the standstill of the roller through the connecting line 24 in the lower region of the heating roller 10 according to the invention can run, whereby uneven temperature profiles, diameter deviations and a disadvantageous Influencing the web-like material to be processed can occur.
  • By the design of the collecting space 28 with a smaller diameter and the Axial displacement creates an obstacle 38 that prevents the condensate from flowing off the feed 24 prevented.
  • Insulations 30 are in the edge region or in the end region of the bores 16 arranged to thermally decouple the condensate contained within the Collection space 28 may be included to effect.
  • further insulation between the flange pin 12 and the roller body 14 be provided, e.g. on the side facing the roller body 14 of the Flow obstacles 38.
  • a hole or a tube 26 is provided which is connected to the collecting space 28.
  • the promotion of the condensate can be via the steam pressure or via one to the Room 22 and thus to the line 18 applied negative pressure.
  • the Tube 26 in flange 12 may have a radial channel in flange 12 are drilled, the tube 26 is inserted into the resulting radial channel, closed off from the outside by means of a closure 34 and inside the channel be fixed.
  • the tube 26 has an opening 27 which, if possible, extends radially outer end of the plenum 28 extends to no obstacle to the condensate to build.
  • a valve device can be provided, via which the condensate drain and thus the temperature of the roller can be controlled, the condensate over the Flow path shown above, driven by the centrifugal force and / or the Vapor pressure and / or an external suction can be deducted.
  • the condensate collecting spaces 22 can also be located in the flange spigot 12, through which the condensate can reach the central axially located line 18.
  • FIG 2 is a partial cross section through a designed according to the invention Heating roller shown, from which in particular again to the hole 16 offset position of the collecting space 28 for the condensate can be seen.
  • connection line 24 In the opposite to the horizontally aligned connecting line 24 arranged obliquely Connection line 24 are the required parts, such as the Collection space 28 and the parts connected to the tube 26, not shown, um the additional parts required in conjunction with the vertically aligned Connection line 24 are to emphasize again separately.
  • FIG. 3 shows a possible circuit for a roller 10 according to the invention shown.
  • a feed line 40 and a steam shut-off valve controlling the feed line 42 can the supply of heating medium or water vapor to the Heating roller 10 according to the invention can be controlled.
  • the Embodiment shown indicates that the water vapor through one Flanged journal of the roller 10 according to the invention and the condensate or without steam from the opposite flange of the invention Heating roller 10 is removed. Of course, both measures could also take place the same flange of the heating roller 10 according to the invention can be made.
  • a drain 44 for the condensate is optionally on the drain side Steam admixture provided.
  • the circuit has a condensate separator 46 who works in one of the familiar ways.
  • a bypass valve 48 is included Condensate separator arranged in parallel and can, for example, for safety purposes be provided.
  • the circuit for a heating medium for the heating roller 10 according to the invention a condensate control valve 50, via which the The amount of condensate can be controlled, which is removed from the heating roller 10. This enables continuous control of the temperature of the heating roller 10 causes namely that the discharge for the condensate in the holes 16th near the roll surface in the heating roll 10 according to the invention is set more or less high.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Drying Of Solid Materials (AREA)
  • Paper (AREA)

Claims (11)

  1. Cylindre chauffant (10) pour matériaux se présentant sous forme de bande, en particulier du papier, comprenant:
    une structure de rouleau cylindrique (14),
    au moins une portée (12) formant flasque,
    au moins une conduite d'amenée et d'évacuation (36) pour de la vapeur d'eau,
    plusieurs alésages (16) au moins approximativement parallèles à l'axe et de préférence périphériques, pour conduire la vapeur d'eau au travers de la structure de rouleau (14), et
    des conduites de raccordement (24) pour la vapeur d'eau, desservant les alésages (16),
    caractérisé en ce que :
    la structure de rouleau est fabriquée en fonte coquillée,
    une chambre collectrice (28) est prévue à toutes les extrémités de chaque alésage périphérique (16), à l'intérieur du cylindre chauffant (10), pour recueillir le condensat qui se forme par condensation de la vapeur d'eau,
    chaque chambre collectrice (28) se voit adjoindre une conduite d'évacuation (26) pour le condensat, et
    en ce qu'un obstacle à l'écoulement, en particulier un décalage axial (38) de la chambre collectrice par rapport à l'axe central de l'alésage, ou des dispositifs d'arrêt, par exemple des soupapes de non-retour, s'opposent à l'écoulement du condensat par les conduites de raccordement (24).
  2. Cylindre chauffant selon la revendication 1, caractérisé en ce que la conduite d'évacuation (26) du condensat, qui est associée à chacune des chambres collectrices (28), est prévue sous forme d'alésage ou d'un tuyau.
  3. Cylindre chauffant selon l'une des revendications 1 ou 2, caractérisé en ce qu'une conduite (20) est prévue, en particulier à l'intérieur de la structure de rouleau (14), pour acheminer la vapeur d'eau à une autre extrémité du cylindre chauffant (10) ou de la structure de rouleau (14).
  4. Cylindre chauffant selon l'une des revendications 1 à 3, caractérisé en ce que la quantité de condensat évacué peut être régulée, de préférence par un élément de soupape.
  5. Cylindre chauffant selon l'une des revendications 1 à 4, caractérisé en ce qu'au moins l'un des alésages (16) est incliné vers le centre du cylindre et par rapport à l'axe du cylindre, et en particulier s'écarte de 1 à 10 mm, environ, du parallélisme par rapport à l'axe, ou est rigoureusement parallèle à l'axe.
  6. Cylindre chauffant selon l'une des revendications 1 à 5, caractérisé en ce qu'au moins l'une des chambres collectrices (28) présente, au moins à une extrémité des alésages (16), une poche (28) de forme sphéroïdale, d'un diamètre qui est, de préférence, plus petit que le diamètre de l'alésage périphérique (16), la poche (18) étant décalée vers l'extérieur par rapport à cet alésage (16).
  7. Cylindre chauffant selon l'une des revendications 1 à 6, caractérisé en ce que la régulation de la température peut être exécutée par une régulation de la pression de la vapeur, de préférence avec une humidification ultérieure de la vapeur.
  8. Cylindre chauffant selon l'une des revendications 1 à 7, caractérisé en ce qu'au moins six alésages périphériques (16), au moins à peu près parallèles à l'axe, sont prévus.
  9. Cylindre chauffant selon l'une des revendications 1 à 8, caractérisé en ce qu'un dispositif d'arrêt, de préférence une soupape de non-retour, des clapets de non-retour ou éléments similaires, est disposé dans les zones respectivement les conduites de raccordement (24) aux extrémités de chaque alésage (16) dans le but de retenir le condensat.
  10. Cylindre chauffant selon l'une des revendications 1 à 9, caractérisé en ce que les zones d'extrémité des alésages (16) sont pourvues d'un matériau thermo-isolant (30).
  11. Cylindre chauffant selon l'une des revendications 1 à 10, caractérisé en ce que dans les zones d'extrémité des différents alésages (16) ménagés au moins à peu près parallèlement à l'axe, on prévoit chaque fois au moins un rétreint (38), pour retenir du condensat, en particulier lors de l'arrêt du cylindre.
EP94914416A 1993-04-23 1994-04-25 Cylindre chauffant Expired - Lifetime EP0647286B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4313379 1993-04-23
DE4313379A DE4313379C2 (de) 1993-04-23 1993-04-23 Heizwalze
PCT/EP1994/001285 WO1994025670A1 (fr) 1993-04-23 1994-04-25 Cylindre chauffant

Publications (2)

Publication Number Publication Date
EP0647286A1 EP0647286A1 (fr) 1995-04-12
EP0647286B1 true EP0647286B1 (fr) 1998-12-02

Family

ID=6486237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94914416A Expired - Lifetime EP0647286B1 (fr) 1993-04-23 1994-04-25 Cylindre chauffant

Country Status (7)

Country Link
US (1) US5662572A (fr)
EP (1) EP0647286B1 (fr)
JP (2) JPH08500862A (fr)
CA (1) CA2139114A1 (fr)
DE (1) DE4313379C2 (fr)
FI (1) FI946067A (fr)
WO (1) WO1994025670A1 (fr)

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JP3943134B2 (ja) * 1996-03-16 2007-07-11 ブリュックナー マシーネンバウ ゲーエムベーハー 圧延用ロールの膨張量変更法及び無限状の平面体を製造し又は加工する装置のロール膨張量変更装置
WO1997038161A1 (fr) * 1996-04-09 1997-10-16 SCHWäBISCHE HüTTENWERKE GMBH Cylindre chauffe par vapeur avec systeme de refroidissement
DE19626371A1 (de) * 1996-07-02 1998-01-08 Schwaebische Huettenwerke Gmbh Walze für alternativen Einsatz
DE19651938B4 (de) * 1996-12-15 2017-09-07 Entex Rust & Mitschke Gmbh Kalanderwalzen oder Glättwalzen
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US6315703B1 (en) * 1999-05-07 2001-11-13 Kleinewefers Textilmaschinen Gmbh Pressure treatment roller
DE10235142A1 (de) * 2002-08-01 2004-02-19 Shw Casting Technologies Gmbh Vorrichtung und Verfahren zur Oberflächenbearbeitung von Papierbahnen und ähnlichen Endlosvliesen mittels beheizbarer Walze
DE10351515A1 (de) * 2003-11-05 2005-06-09 Voith Paper Patent Gmbh Walze zur thermischen Behandlung einer Materialbahn
KR101455109B1 (ko) * 2013-06-27 2014-10-29 현대제철 주식회사 벨트 컨베이어용 해동장치
CN106945347B (zh) * 2017-04-19 2023-08-18 云南全心包装印刷有限公司 一种稳定节能的蒸汽压辊及应用其的蒸汽节能循环系统
DE102019120827A1 (de) * 2018-08-10 2020-02-13 Oerlikon Textile Gmbh & Co. Kg Galette
CN113465342B (zh) * 2021-07-15 2022-11-18 荆州市中宇防水材料有限公司 一种用于生产防水卷材的胎体烘干机

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Also Published As

Publication number Publication date
FI946067A (fi) 1995-02-20
CA2139114A1 (fr) 1994-11-10
EP0647286A1 (fr) 1995-04-12
DE4313379A1 (de) 1994-10-27
DE4313379C2 (de) 1998-11-05
WO1994025670A1 (fr) 1994-11-10
FI946067A0 (fi) 1994-12-23
JP3706595B2 (ja) 2005-10-12
US5662572A (en) 1997-09-02
JP2002339284A (ja) 2002-11-27
JPH08500862A (ja) 1996-01-30

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