EP0768424B1 - Cylindre chauffant - Google Patents

Cylindre chauffant Download PDF

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Publication number
EP0768424B1
EP0768424B1 EP96115816A EP96115816A EP0768424B1 EP 0768424 B1 EP0768424 B1 EP 0768424B1 EP 96115816 A EP96115816 A EP 96115816A EP 96115816 A EP96115816 A EP 96115816A EP 0768424 B1 EP0768424 B1 EP 0768424B1
Authority
EP
European Patent Office
Prior art keywords
steam
discharge
set forth
heated roll
condensate
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
EP96115816A
Other languages
German (de)
English (en)
Other versions
EP0768424A2 (fr
EP0768424A3 (fr
Inventor
Heinz-Michael Dr. 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 EP0768424A2 publication Critical patent/EP0768424A2/fr
Publication of EP0768424A3 publication Critical patent/EP0768424A3/fr
Application granted granted Critical
Publication of EP0768424B1 publication Critical patent/EP0768424B1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits

Definitions

  • the invention relates to the construction of steam-heated, preferably metallic, Rolls e.g. in paper machines, film drawing machines or the like machine equipment can be used.
  • the rollers often have to do this Purpose to be heated using liquid or gaseous heat transfer media Find.
  • such rollers are with a large number of axially parallel bores close to the periphery through which the Heat transfer medium is passed.
  • the invention deals with the embodiment of which is used as a heat carrier water vapor.
  • Such a roller is described in DE-A-43 13 379 by the applicant.
  • the one there Execution of the roller provides that through the peripheral holes conducted steam condenses at least partially in this, whereupon the condensate, centrifugal assisted to the ends of the peripheral bores at the roller ends flows and from there due to the vapor pressure or one to a drain pipe applied negative pressure through tubes or holes to the roller axis is where it will be derived from the roller through the drain line can.
  • a tube or bore is located at each end of the peripheral Holes.
  • the condensate control valve With a condensate control valve, the amount of runoff can be reduced Condensate can be controlled.
  • the heating power of the Determine roller is described in DE-A-43 13 379 by the applicant.
  • the differential pressure control system has a throttle valve in the outflow line, which has a certain differential pressure between the inflow line and the Discharge line of the roller maintained. Wants more steam to flow through the roller than intended, the pressure difference of the lines increases and the valve closes, and vice versa.
  • Flow control is e.g. on a throttle by measuring the pressure drop, the amount of overflow steam in the Discharge line determined and directly via an appropriately controlled throttle valve regulated.
  • peripheral heated steam-heated rolls Holes not reliable enough. Because either the common pressure difference for all drainage pipes of a peripherally drilled roller or the sum of the blow-through steam through all drainage pipes as well measured together, it can always happen that between Adjust the flow differences in the individual drainage pipes, which increase the Steam blowing through single or a group of tubes on the one hand and on the other hand, to overflow of one or more peripheral holes to lead.
  • DE 38 01 815 A1 discloses a device for removing condensate from a steam-heated drying cylinder.
  • the direction of rotation of the incoming steam is adjusted in a hollow drying cylinder by means of a suction mouthpiece provided on the inner cylinder wall so that the condensate collecting in a condensate riser pipe can be detached from the wall and transported away by the Coriolis force.
  • suction mouthpieces which must have relatively large dimensions because of the need to provide a large angular momentum, cannot be used in the limited space in the area of the entry points of the discharge pipes or bores of peripherally heated rollers.
  • the object of the invention is a, preferably temperature-controllable, steam-heated To propose roller, in which the removal of the resulting in the holes Condensate is reliably released in any operating condition.
  • discharge pipes or bores have at least one cross-sectional constriction and are thus designed are that they are a mixture, preferably swirling, of condensate and Cause steam.
  • a very small inner diameter can be provided at their ends near the peripheral bores, which is, for example, between 2 and 4 mm. This results in a strong increase in the flow rate of the condensate and the blowing steam, so that the resulting turbulence prevents the two media from segregating.
  • the free opening preferably has a cross-sectional area of 3 to about 12 mm 2 , in particular 3 to 7 mm 2 , and particularly preferably of about 3 mm 2 .
  • Twisting is also suitable for producing the necessary mixing Tube.
  • Such a discharge pipe is preferably designed such that the flow at least is turned sharply once.
  • An installation or the like can also be used for this purpose be provided.
  • Two peripheral bores can also be drilled through 2 connecting pipes or - channels are connected to the drain pipe or the drain hole through 1 common such pipe or a common such bore drained become.
  • Each of the above configurations according to the invention enables one each Roller to find individual operating point at which that in the peripheral Drilling condensate according to the given operating speed, the predetermined heating steam pressure and the set external differential pressure for the Total roller is reliably removed from the individual holes without the different holes influence each other excessively and without the The amount of total steam blowing through becomes uneconomically large.
  • the necessary cross-sectional narrowing of the discharge pipes and bores, the valves or internals in the pipes or bores also Operational risk because it can lead to constipation.
  • Carried with the steam Foreign bodies or even corrosion particles can enter the inlet openings The easier it is to lay drainage pipes or the narrowing points, the less are the respective free diameters.
  • the openings or meshes at most the diameter of the narrowest cross-section of the discharge pipes or holes accordingly. A foreign body that would be suitable for this Clogging the narrowest cross sections is stopped on the basket.
  • hot steam flows through the feed pipe 1 in the roll neck 2 on the one hand further through the steam channels 3 into the peripheral Bores 4 in the roller body 5, on the other hand through the central bore 6 in the roller body 5 to the other end of the roller, from there also through Steam channels to be introduced into peripheral holes.
  • Condensate that is in forms the peripheral holes (black arrows) from the holes 4 by means of of the steam pressure and flows to the end of the roll, either forward, i.e. with the steam flow direction, or backwards, against it, as in the Drawing shown.
  • the condensate collects in the collecting rooms 10 and passes from there, further under steam pressure, through the discharge pipes 7 into the Return pipe 8 through which it can leave the roller.
  • the drain pipes are provided at its outer end with a plug 9.
  • FIG. 2 shows, as a detail from FIG. 1, a discharge pipe 7 according to the prior art Technology.
  • FIG. 3 shows an embodiment of a discharge pipe 7 according to the invention, wherein the cross section of the tube 7 is narrowed.
  • FIG 4 a tube is shown with an inserted nozzle 12 instead of Pipe constriction.
  • Figure 5 shows a discharge pipe 7, which is twisted. Thereby a swirl of condensate and blow-by steam is achieved, so that a uniform drainage can take place.
  • FIG. 6 shows the arrangement of a sieve 11 in front of the discharge pipe 7.
  • the opening is to enable cleaning for the plug 9 so large that the screen 11 in and out can be.
  • Figure 7 shows an example of the dependencies between There is steam demand from the roller and blow-by steam.
  • the four re-enact it on the right, sloping curves show the drainage performance of the roller at various Differential vapor pressures (from above: 0.8 / 0.7 / 0.6 / 0.5 bar); the right slightly increasing lower curve corresponds to the steam throughput, each with increasing Blow-through steam as a percentage by weight.
  • the intersections of the curves are the stable operating points with a set differential pressure and given heating output. As can be seen, these are in the range between 5 and 20% blow-by steam.

Landscapes

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

Claims (10)

  1. Cylindre chauffé à la vapeur portant des trous (4) de préférence périphériques, au moins approximativement parallèles à l'axe, pour l'apport ou l'évacuation de la chaleur et des tuyaux ou trous d'évacuation (7) s'étendant radialement de ceux-ci vers le milieu du cylindre pour l'évacuation des condensats, caractérisé en ce que les tuyaux ou trous d'évacuation (7) présentent au moins un étranglement de section et sont ainsi formés de telle façon qu'ils provoquent un mélange ou tourbillonnement du condensat et de la vapeur.
  2. Cylindre chauffé à la vapeur suivant la revendication 1, caractérisé en ce que l'étranglement de section est formé par une buse ou un obturateur (12) inséré dans le tuyau.
  3. Cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce que le tuyau d'évacuation (7) est tordu, présente de préférence au moins une chicane serrée ou un équivalent, déviant l'écoulement.
  4. Cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce que les tuyaux ou trous d'évacuation (7), de préférence continus, présentent aux étranglements de section une section libre comprise entre 3 et environ 12 mm2, de préférence entre 3 et 7 mm2, en particulier de 3 mm2.
  5. Cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce qu'au moins deux trous périphériques (4) sont reliés par des tuyaux ou canaux de liaison avec un tuyau d'évacuation ou un trou d'évacuation (7) et sont vidangés à travers celui-ci.
  6. Cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce qu'au maximum un quart des trous périphériques (4) sont reliés à l'aide des tuyaux ou canaux de liaison avec un tuyau d'évacuation ou un trou d'évacuation (7) et sont vidangés à travers celui-ci.
  7. Cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce qu'un tamis (11) est disposé devant les tuyaux ou les trous d'évacuation (7) dans la direction d'écoulement, dont les ouvertures sont plus petites ou égales aux plus petits diamètres dans le tuyau d'évacuation ou le trou d'évacuation (7).
  8. Cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce que, en face de l'extrémité extérieure des tuyaux ou trous d'évacuation (7), des ouvertures sont prévues et sont fermées par un moyen de fermeture (9) amovible.
  9. Cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce que l'ouverture est si grande que le tamis (11) ou le tuyau d'évacuation complet (7) peut être retiré à travers celle-ci.
  10. Procédé de régulation du débit de vapeur et de l'évacuation des condensats dans un cylindre chauffé à la vapeur suivant l'une des revendications précédentes, caractérisé en ce que la différence de pression entre l'entrée et la sortie de la vapeur par trou périphérique (4) est commandée de telle façon en fonction de la puissance de chauffage désirée, de la pression de vapeur et/ou de la vitesse de rotation du cylindre que le pourcentage de vapeur entraínée, qui ressort avec les condensats, se situe en dessous de 20 pour cent en poids, de préférence entre 5 et 15 pour cent en poids.
EP96115816A 1995-10-13 1996-10-02 Cylindre chauffant Expired - Lifetime EP0768424B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19538236A DE19538236A1 (de) 1995-10-13 1995-10-13 Heizwalze
DE19538236 1995-10-13

Publications (3)

Publication Number Publication Date
EP0768424A2 EP0768424A2 (fr) 1997-04-16
EP0768424A3 EP0768424A3 (fr) 1998-05-13
EP0768424B1 true EP0768424B1 (fr) 2000-06-14

Family

ID=7774825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115816A Expired - Lifetime EP0768424B1 (fr) 1995-10-13 1996-10-02 Cylindre chauffant

Country Status (5)

Country Link
US (1) US6039681A (fr)
EP (1) EP0768424B1 (fr)
JP (1) JPH09133125A (fr)
CA (1) CA2187056A1 (fr)
DE (2) DE19538236A1 (fr)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI106054B (fi) * 1999-03-29 2000-11-15 Valmet Corp Paperi-/kartonkikoneen tai jälkikäsittelykoneen termotela ja menetelmä termotelan valmistamiseksi
US5899264A (en) * 1997-09-17 1999-05-04 Marquip, Inc. Steam supply and condensate removal apparatus for heated roll
DE19747555A1 (de) 1997-10-28 1999-04-29 Voith Sulzer Papiertech Patent Heiz- und/oder kühlbarer Zylinder
DE19809080C2 (de) * 1997-12-17 2003-08-14 Voith Paper Patent Gmbh Dampfbeheizte Walze
DE19756152C2 (de) * 1997-12-17 2002-06-27 Voith Paper Patent Gmbh Dampfbeheizte Walze
EP0942097A1 (fr) * 1998-03-05 1999-09-15 Walzen Irle GmbH Echangeur de chaleur
DE19819072C1 (de) * 1998-04-29 1999-08-19 Voith Sulzer Papiertech Patent Dampfbeheizte Walze
US6161303A (en) * 1998-10-29 2000-12-19 Voith Sulzer Papiertechnik Patent Gmbh Pressing apparatus having chamber end sealing
FI105115B (fi) * 1998-12-02 2000-06-15 Valmet Corp Kuumennettava tela
ATE221154T1 (de) * 1999-02-17 2002-08-15 Walzen Irle Gmbh Walze
US6619471B1 (en) 2000-10-25 2003-09-16 Surface Engineering Associates, Inc. Furnace roller
WO2002034026A1 (fr) * 2000-10-25 2002-05-02 Surface Engineering Associates, Inc. Rouleau transporteur pour four
FI20002885A0 (fi) * 2000-12-29 2000-12-29 Santasalo Powermet Oy Menetelmä paperi- tai kartonkikoneen tai jälkikäsittelykoneen telan telapäädyn valmistamiseksi ja tela, etenkin kuumennettava tela
DE10207505B4 (de) * 2002-02-22 2015-07-30 Shw Casting Technologies Gmbh Walze
DE10230037B9 (de) * 2002-07-04 2004-10-21 Voith Paper Patent Gmbh Heizwalze und Verfahren zu ihrer Herstellung
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
DE10239559B4 (de) 2002-08-28 2016-09-29 Shw Casting Technologies Gmbh Walze für die thermomechanische Behandlung eines bahnförmigen Mediums
DE10351515A1 (de) * 2003-11-05 2005-06-09 Voith Paper Patent Gmbh Walze zur thermischen Behandlung einer Materialbahn
DE102005000782A1 (de) * 2005-01-05 2006-07-20 Voith Paper Patent Gmbh Trockenzylinder
DE102005000795A1 (de) * 2005-01-05 2006-07-13 Voith Paper Patent Gmbh Vorrichtung und Verfahren zur Herstellung und/oder Veredelung einer Faserstoffbahn
CA2754893C (fr) * 2009-03-17 2016-10-18 Bricmont, Inc. Ensemble galet de four
JP5890270B2 (ja) * 2012-07-20 2016-03-22 株式会社日立パワーソリューションズ ドリルドロール及びロールプレス装置
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
KR102201075B1 (ko) * 2019-01-10 2021-01-11 에스 알 씨 주식회사 외표면 증기순환식 골성형롤러
CN114396781B (zh) * 2021-12-01 2023-02-21 泰州印染机械有限公司 高效节能双层蒸汽烘筒

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721016A (en) * 1969-08-04 1973-03-20 Int Paper Co Method of removing condensate from a rotary dryer
US4194299A (en) * 1978-04-11 1980-03-25 Sca Development Aktiebolag Condensate discharging device
DE3801815A1 (de) * 1988-01-22 1989-08-03 Voith Gmbh J M Vorrichtung zum abfuehren von kondensat aus einem dampfbeheizten trockenzylinder oder dergleichen mittels eines rotierenden siphons
DE4313379C2 (de) * 1993-04-23 1998-11-05 Schwaebische Huettenwerke Gmbh Heizwalze

Also Published As

Publication number Publication date
EP0768424A2 (fr) 1997-04-16
US6039681A (en) 2000-03-21
JPH09133125A (ja) 1997-05-20
DE19538236A1 (de) 1997-04-17
DE59605433D1 (de) 2000-07-20
CA2187056A1 (fr) 1997-04-14
EP0768424A3 (fr) 1998-05-13

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