EP0768424A2 - Cylindre chauffant - Google Patents

Cylindre chauffant Download PDF

Info

Publication number
EP0768424A2
EP0768424A2 EP96115816A EP96115816A EP0768424A2 EP 0768424 A2 EP0768424 A2 EP 0768424A2 EP 96115816 A EP96115816 A EP 96115816A EP 96115816 A EP96115816 A EP 96115816A EP 0768424 A2 EP0768424 A2 EP 0768424A2
Authority
EP
European Patent Office
Prior art keywords
steam
bores
heated roller
roller according
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.)
Granted
Application number
EP96115816A
Other languages
German (de)
English (en)
Other versions
EP0768424A3 (fr
EP0768424B1 (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. can be used in paper machines, film drawing machines or similar machine equipment.
  • the rolls often have to be heated for this purpose, using liquid or gaseous heat transfer media.
  • such rollers are provided with a multiplicity of axially parallel bores which are close to the periphery and through which the heat transfer medium is guided.
  • the invention deals with the configuration in which water vapor is used as the heat carrier.
  • Such a roller is described in DE-A-43 13 379 by the applicant.
  • the design of the roller there provides that the through the peripheral holes conducted steam condenses in this at least partially, whereupon the condensate, assisted by centrifugal force, flows to the ends of the peripheral bores at the ends of the rolls and is pressed from there due to the steam pressure or a negative pressure applied to a drain line through pipes or bores to the roll axis, from where it can be discharged from the roller through the drain line.
  • a tube or bore is located at each end of the peripheral bore.
  • the amount of condensate flowing out can be controlled with a condensate control valve.
  • the heating power of the roller can thus also be determined.
  • Blow-through steam control systems are e.g. known for drying cylinders in paper machines. A distinction is made between differential pressure control systems and flow rate control systems.
  • the differential pressure control system has a throttle valve in the outflow line, which maintains a certain differential pressure between the inflow line and the outflow line of the roller. If more steam wants 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. the flow rate of blow-by steam in the discharge line is determined at a throttle by measuring the pressure loss and regulated directly via a correspondingly controlled throttle valve.
  • the object of the invention is to propose a, preferably temperature-controllable, steam-heated roller, in which the removal of the condensate formed in the bores is reliably solved in every operating state.
  • discharge pipes or bores are designed such that they cause mixing, preferably swirling, of condensate and 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 the pipes is also suitable for producing the necessary mixing.
  • Such a discharge pipe is preferably designed such that the flow is sharply deflected at least once.
  • An installation or the like can also be used for this purpose be provided.
  • Each of the above embodiments according to the invention makes it possible to find an individual operating point for each roller, at which the condensate occurring in the peripheral bores is reliably removed from the individual bores in accordance with the given operating speed, the predetermined heating steam pressure and the set external differential pressure for the entire roller that the different bores influence each other excessively and without the amount of the total blowing steam becoming uneconomically large. It has proven to be advantageous not to exceed ten percent by weight of condensed steam as the maximum value. More than 20 percent by weight are outside of sensible management.
  • a basket or a retaining device is arranged on the side of the discharge pipes or bores facing the outer circumference, the openings or meshes of which are at most the diameter of the narrowest cross section of the discharge pipes or holes accordingly. A foreign body that would be able to block these narrowest cross sections is stopped on the basket.
  • each peripheral bore has two such tubes or bores, namely at both ends. If the occurrence of such foreign bodies cannot be ruled out over a longer period of operation, it is advisable to design the closures mentioned in DE-A-43 13 379 as service openings which can be opened and closed again in a simple manner.
  • the service baskets or retaining devices can then be serviced through such service openings without major interventions on the roller, such as the dismantling of the roller journals, being necessary. It is also possible with certain roller designs to replace drain pipes if they should show cavitation damage due to the high condensate speeds over a long period of operation.
  • hot steam flows through the feed pipe 1 in the roll neck 2 on the one hand through the steam channels 3 into the peripheral bores 4 in the roll body 5, and on the other hand through the central bore 6 in the roll body 5 to the other end of the roll in order to be introduced from there through steam channels into peripheral holes.
  • Condensate that forms in the peripheral bores (black arrows) is forced out of the bores 4 by means of the vapor pressure and flows to the end of the roll, either forward, i.e. with the steam flow direction, or backwards, against it, as shown in the drawing.
  • the condensate collects in the collecting spaces 10 and from there, further under vapor pressure, through the discharge pipes 7 into the return pipe 8, through which it can leave the roller.
  • the discharge pipes are provided with sealing plugs 9 at their outer end.
  • FIG 2 shows, as a detail from Figure 1, a discharge pipe 7 according to the prior art.
  • FIG. 3 shows an embodiment of a discharge pipe 7 according to the invention, the cross section of the pipe 7 being narrowed.
  • FIG. 4 shows a pipe with an inserted nozzle 12 instead of the pipe constriction.
  • Figure 5 shows a discharge pipe 7, which is twisted. This causes a swirling of condensate and blow-by steam, so that even dewatering can take place.
  • FIG. 6 shows the arrangement of a sieve 11 in front of the discharge pipe 7.
  • the opening for the sealing plug 9 is made so large that the sieve 11 can be inserted and removed.
  • Figure 7 shows an example of the dependencies between the steam requirement of the roller and blow-by steam.
  • the four curves falling to the right represent the drainage performance of the roller at different differential vapor pressures (from above: 0.8 / 0.7 / 0.6 / 0.5 bar); the lower curve, which rises slightly to the right, corresponds to the steam throughput, each with an increasing proportion of blow-by steam in weight percent.
  • the interfaces of the curves are the stable operating points with a set differential pressure and a 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)
  • Treatment Of Fiber Materials (AREA)
  • Rolls And Other Rotary Bodies (AREA)
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 true EP0768424A2 (fr) 1997-04-16
EP0768424A3 EP0768424A3 (fr) 1998-05-13
EP0768424B1 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)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903438A3 (fr) * 1997-09-17 1999-06-02 Marquip, Inc. Alimentation en vapeur et évacuation des condensats pour un rouleau chauffé
EP0942097A1 (fr) * 1998-03-05 1999-09-15 Walzen Irle GmbH Echangeur de chaleur
EP0924339A3 (fr) * 1997-12-17 2000-04-19 Voith Sulzer Papiertechnik Patent GmbH Rouleau chauffé à la vapeur
EP1029976A1 (fr) * 1999-02-17 2000-08-23 Walzen Irle GmbH Rouleau
CN106945347A (zh) * 2017-04-19 2017-07-14 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

Families Citing this family (20)

* 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
DE19747555A1 (de) 1997-10-28 1999-04-29 Voith Sulzer Papiertech Patent Heiz- und/oder kühlbarer Zylinder
DE19756152C2 (de) * 1997-12-17 2002-06-27 Voith Paper Patent Gmbh Dampfbeheizte Walze
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
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
FI109137B (fi) * 2000-12-29 2002-05-31 Metso Powdermet 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
CN102388287B (zh) * 2009-03-17 2013-12-25 安德里兹布里科蒙公司 炉辊组件
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
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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903438A3 (fr) * 1997-09-17 1999-06-02 Marquip, Inc. Alimentation en vapeur et évacuation des condensats pour un rouleau chauffé
EP0924339A3 (fr) * 1997-12-17 2000-04-19 Voith Sulzer Papiertechnik Patent GmbH Rouleau chauffé à la vapeur
US6128827A (en) * 1997-12-17 2000-10-10 Voith Sulzer Papiertechnik Patent Gmbh Steam-heated roll and process
EP0942097A1 (fr) * 1998-03-05 1999-09-15 Walzen Irle GmbH Echangeur de chaleur
EP1029976A1 (fr) * 1999-02-17 2000-08-23 Walzen Irle GmbH Rouleau
CN106945347A (zh) * 2017-04-19 2017-07-14 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
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

Also Published As

Publication number Publication date
DE19538236A1 (de) 1997-04-17
JPH09133125A (ja) 1997-05-20
DE59605433D1 (de) 2000-07-20
EP0768424A3 (fr) 1998-05-13
EP0768424B1 (fr) 2000-06-14
US6039681A (en) 2000-03-21
CA2187056A1 (fr) 1997-04-14

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