EP0567875A1 - Procédé et dispositif de refroidissement d'un cylindre rotatif de refroidissement par evaporation de liquide dans une machine à papier - Google Patents

Procédé et dispositif de refroidissement d'un cylindre rotatif de refroidissement par evaporation de liquide dans une machine à papier Download PDF

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Publication number
EP0567875A1
EP0567875A1 EP93106281A EP93106281A EP0567875A1 EP 0567875 A1 EP0567875 A1 EP 0567875A1 EP 93106281 A EP93106281 A EP 93106281A EP 93106281 A EP93106281 A EP 93106281A EP 0567875 A1 EP0567875 A1 EP 0567875A1
Authority
EP
European Patent Office
Prior art keywords
cooling
roller
coolant
liquid
heat
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.)
Withdrawn
Application number
EP93106281A
Other languages
German (de)
English (en)
Inventor
Ulrich Begemann
Karl Steiner
Robert Wolf
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0567875A1 publication Critical patent/EP0567875A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • D21F5/06—Regulating temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • F28D11/04—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller performed by a tube or a bundle of tubes

Definitions

  • the invention relates to a method and a device for cooling a rotating cooling roller of a paper machine by liquid evaporation.
  • All the cooling rollers disclosed here have in common that a liquid is used as the coolant, which has a low temperature T 1 when entering the cooling roller and whose cooling capacity is that it absorbs the heat given off by the cooling roller shell and its Temperature is raised to a higher temperature level T2. The heat is then withdrawn from the cooling roll by the heated cooling medium and in turn new coolant is again supplied with the temperature T 1. Since the heat transfer between the cooling jacket and the coolant is now proportional to the temperature difference between the two and the coolant continues to increase its temperature as it passes over the surfaces to be cooled, there is naturally also a different heat transfer. The disadvantage here is that the surface temperature of a roller cooled in this way is non-uniform, or is only made uniform with a high level of design effort.
  • the invention has for its object to eliminate the above-mentioned disadvantages of the prior art and in particular to provide an inexpensive and reliable device for cooling rotating, thin-walled rollers. Particular value is placed on the fact that the surface temperature of the roller is the same at every point even with different heat transport through the roller shell or different heat input to the roller shell.
  • an essential idea of the invention is to use the heat of vaporization of a liquid (difference in enthalpy between the gaseous and liquid phase) for heat transport.
  • a liquid is poured into the roller, the boiling temperature of which corresponds to the desired surface temperature of the roller at a predetermined saturation vapor pressure in the roller.
  • the coolant is distributed in a ring on the inner shell of the roller.
  • the cooling liquid begins to evaporate, the temperature of the condensate which has not yet evaporated not increasing further.
  • the amount of coolant required for evaporation in the roller can be obtained by condensation of the coolant vapor generated in the roller.
  • a capacitor located in the roller can be used for this. If the interior of the roller is sealed off from the environment in a pressure-tight manner, there is a loss-free circulation of the coolant between the interior of the roller and the condenser in the roller.
  • the boiling point of the coolant can be in a closed circuit e.g. can be regulated by changing the cooling water throughput through the condenser.
  • the saturation pressure and thus the boiling temperature can be controlled by actuators such as pressure relief valves, compressors, suction or pressure pumps.
  • actuators such as pressure relief valves, compressors, suction or pressure pumps.
  • Direct control of the temperature via the heat exchanger is also possible, as a result of which a very simple control is obtained and, at the same time, the advantage of a temperature profile that is constant over the length of the roll.
  • a Another advantage of such pressure-tight closed systems is the possibility to use toxic or aggressive coolants.
  • Rolls in the sense of the invention can also be so-called Flexonip press units in connection with the Flexonip jacket with associated rotating lids.
  • An oil / water mixture is preferably used as the cooling medium.
  • Fig. 1 shows a roller 1 consists of the cylindrical roller shell 4, which is carried by a driver-side roll neck 3 and a drive-side roll neck 2.
  • the driver-side roll neck 3 is provided with a core bore through which the supply and discharge lines 5 lead to the internal capacitor 6.
  • the condenser is attached directly to the driver side of the roller.
  • FIG. 2 again shows a roller 1 consisting of the roller jacket 4, the drive-side roller pin 2 and the driver-side roller pin 3.
  • the roller pin 3 is in turn provided with a core hole through which the feed and discharge line 5 for the coolant is passed.
  • the feed line ends in the inside of the roll in the coolant ring 6.
  • the inlet opening in the discharge of the vaporous coolant 7 is centrally on the driver's side attached to the roll shell.
  • the discharge line 5.1 leads past a pressure limiting valve 8 with an outlet to the outside to an external condenser 9.
  • the condensate is fed back from the condenser 9 via the supply line 5.2 back to the coolant ring 6 via the bore of the roll neck into the inside of the roll.
  • the condenser is cooled via an external cooling circuit 10.
  • FIG. 3 shows a further possible embodiment of the invention in a roller 1 with a roller shell 4, which is supported by the drive-side roll neck 2 and the driver-side roll neck 3.
  • Central bores are made in both roller journals 2 and 3, through which feed and discharge lines 5 are guided into the interior of the roller.
  • the roller cylinder is divided into several chambers by built-in pressure-tight walls 11.
  • a coolant supply and discharge line lead into each chamber.
  • the supply lines each end in the coolant ring 6 while the discharge lines have their inlet openings in the region of the central axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP93106281A 1992-04-25 1993-04-17 Procédé et dispositif de refroidissement d'un cylindre rotatif de refroidissement par evaporation de liquide dans une machine à papier Withdrawn EP0567875A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924213688 DE4213688A1 (de) 1992-04-25 1992-04-25 Verfahren und einrichtung zur kuehlung einer rotierenden walze durch kuehlmittelverdampfung
DE4213688 1992-04-25

Publications (1)

Publication Number Publication Date
EP0567875A1 true EP0567875A1 (fr) 1993-11-03

Family

ID=6457498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106281A Withdrawn EP0567875A1 (fr) 1992-04-25 1993-04-17 Procédé et dispositif de refroidissement d'un cylindre rotatif de refroidissement par evaporation de liquide dans une machine à papier

Country Status (2)

Country Link
EP (1) EP0567875A1 (fr)
DE (1) DE4213688A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0814196A2 (fr) * 1996-06-21 1997-12-29 Voith Sulzer Finishing GmbH Cylindre
EP0861941A2 (fr) * 1997-02-27 1998-09-02 Voith Sulzer Finishing GmbH Agencement de rouleau
DE19822531A1 (de) * 1998-05-19 1999-12-09 Voith Sulzer Papiertech Patent Kalanderwalze
US6209451B1 (en) 1998-06-03 2001-04-03 Voith Sulzer Papiertechnik Patent Gmbh Roll, calender, and process for operating a roll

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511086A1 (de) * 1995-03-25 1996-09-26 Schwaebische Huettenwerke Gmbh Dampfbeheizte Walze mit Kühlung
WO1997038161A1 (fr) * 1996-04-09 1997-10-16 SCHWäBISCHE HüTTENWERKE GMBH Cylindre chauffe par vapeur avec systeme de refroidissement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1604939B1 (de) * 1963-11-06 1970-08-20 Johnson Corp Mit Dampf beschickter,schnell laufender Walzentrockner
CH585352A5 (en) * 1976-04-20 1977-02-28 Ciba Geigy Ag Pressing or crushing roll for paper or textiles processing - comprising chamber for pressurised fluid between supporting core and flexible jacket
DE2914332A1 (de) * 1979-04-09 1980-10-30 Busch Trocknungs Technik Gmbh Arbeitsverfahren zum trocknen von feuchtigkeit enthaltenden bahnen
DE3421753A1 (de) * 1983-09-29 1985-04-18 Veb Kombinat Nagema, Ddr 8045 Dresden Verfahren und vorrichtung zur kuehlung von hohlwalzen
DD225767A1 (de) * 1983-12-08 1985-08-07 Koethen Ing Hochschule Kuehlwalze, insbesondere zum praegen und gravieren von folien
EP0292123A2 (fr) * 1987-05-09 1988-11-23 Sasakura Engineering Co. Ltd. Rouleau de refroidissement pour une machine réfrigérante

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927198A1 (de) * 1979-07-05 1981-01-15 Maschf Augsburg Nuernberg Ag Kuehlwalze mit einem aeusseren walzenmantel und einem innenkoerper
ES8207272A1 (es) * 1981-10-08 1982-08-16 Argemi Sans Valeriano Sistema para refrigeracion de cilindros giratorios
DD225768A1 (de) * 1983-12-08 1985-08-07 Koethen Ing Hochschule Einrichtung zur kuehlung von praege- und gravierwalzen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1604939B1 (de) * 1963-11-06 1970-08-20 Johnson Corp Mit Dampf beschickter,schnell laufender Walzentrockner
CH585352A5 (en) * 1976-04-20 1977-02-28 Ciba Geigy Ag Pressing or crushing roll for paper or textiles processing - comprising chamber for pressurised fluid between supporting core and flexible jacket
DE2914332A1 (de) * 1979-04-09 1980-10-30 Busch Trocknungs Technik Gmbh Arbeitsverfahren zum trocknen von feuchtigkeit enthaltenden bahnen
DE3421753A1 (de) * 1983-09-29 1985-04-18 Veb Kombinat Nagema, Ddr 8045 Dresden Verfahren und vorrichtung zur kuehlung von hohlwalzen
DD225767A1 (de) * 1983-12-08 1985-08-07 Koethen Ing Hochschule Kuehlwalze, insbesondere zum praegen und gravieren von folien
EP0292123A2 (fr) * 1987-05-09 1988-11-23 Sasakura Engineering Co. Ltd. Rouleau de refroidissement pour une machine réfrigérante

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 128 (M-384)4. Juni 1983 *
TAPPI JOURNAL Bd. 74, Nr. 10, Oktober 1991, ATLANTA US Seiten 131 - 136 D.A. ROUNDS ET AL. 'Rotating and stationary siphons in high-speed dryer sections' *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0814196A3 (fr) * 1996-06-21 1999-01-13 Voith Sulzer Finishing GmbH Cylindre
DE19624737A1 (de) * 1996-06-21 1998-01-02 Voith Sulzer Finishing Gmbh Walze
US6405790B1 (en) 1996-06-21 2002-06-18 Voith Sulzer Finishing Gmbh Roll
EP0814196A2 (fr) * 1996-06-21 1997-12-29 Voith Sulzer Finishing GmbH Cylindre
DE19707876A1 (de) * 1997-02-27 1998-09-10 Voith Sulzer Finishing Gmbh Walzenanordnung
EP0861941A3 (fr) * 1997-02-27 1999-11-03 Voith Sulzer Finishing GmbH Agencement de rouleau
US6095237A (en) * 1997-02-27 2000-08-01 Voith Sulzer Finishing Gmbh Roll arrangement and method for cooling a roll
EP0861941A2 (fr) * 1997-02-27 1998-09-02 Voith Sulzer Finishing GmbH Agencement de rouleau
DE19707876C2 (de) * 1997-02-27 2002-09-26 Voith Paper Patent Gmbh Walzenanordnung
DE19822531A1 (de) * 1998-05-19 1999-12-09 Voith Sulzer Papiertech Patent Kalanderwalze
DE19822531B4 (de) * 1998-05-19 2006-11-30 Voith Patent Gmbh Kalanderwalze
US6209451B1 (en) 1998-06-03 2001-04-03 Voith Sulzer Papiertechnik Patent Gmbh Roll, calender, and process for operating a roll
DE19824542B4 (de) * 1998-06-03 2005-07-14 Voith Paper Patent Gmbh Walze, Kalander und Verfahren zum Betrieb einer Walze

Also Published As

Publication number Publication date
DE4213688A1 (de) 1992-11-05

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