EP2268991A1 - Dispositif et procédé pour sécher des bandes de matière en mouvement - Google Patents

Dispositif et procédé pour sécher des bandes de matière en mouvement

Info

Publication number
EP2268991A1
EP2268991A1 EP09725873A EP09725873A EP2268991A1 EP 2268991 A1 EP2268991 A1 EP 2268991A1 EP 09725873 A EP09725873 A EP 09725873A EP 09725873 A EP09725873 A EP 09725873A EP 2268991 A1 EP2268991 A1 EP 2268991A1
Authority
EP
European Patent Office
Prior art keywords
drying
heat
heat exchanger
group
steam
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Withdrawn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
EP09725873A
Other languages
German (de)
English (en)
Inventor
Klaus Gissing
Rodney Smith
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Publication of EP2268991A1 publication Critical patent/EP2268991A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
    • F26B13/183—Arrangements for heating, cooling, condensate removal
    • F26B13/186—Arrangements for heating, cooling, condensate removal using combustion
    • 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
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
    • 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
    • D21F5/20—Waste heat recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a drying device for moving material webs, in particular paper, cardboard or fibrous webs, with at least two successive drying groups, each with a plurality of heatable drying cylinders, according to the preamble of claim 1 '.
  • the invention further relates to a method for drying moving material webs, in particular paper, board or fibrous webs, with at least two successive drying groups each having a plurality of heatable drying cylinders, according to the preamble of claim 9.
  • Drying devices of this type exist in many embodiments, and use about drying cylinders of different types.
  • steam-heated drying cylinders or fuel-heated drying cylinders are known.
  • Steam-heated drying cylinders are supplied with steam, which is either produced in an external boiler house or can be taken from other plant sections.
  • Fuel-heated drying cylinders is supplied to a combustible energy source in liquid or gaseous form, in particular natural gas, but other energy sources such as oil, biogas, kerosene, diesel or gasoline are conceivable.
  • fuel-heated drying cylinders higher evaporation rates are generally achieved than with steam-heated drying cylinders.
  • drying cylinder types are generally used in a generic drying apparatus, ie a series of steam-heated drying cylinders followed by a sequence of gas-heated drying cylinders. These sequences of functionally identical drying cylinders are referred to below as drying groups.
  • the drying of the material web by means of drying cylinders takes place via direct contact of the material web with the Cylinder surface.
  • This type of drying is therefore also referred to as contact drying.
  • the drying cylinders can be arranged in a single-row or two rows, with a single-row arrangement of the drying cylinder mostly deflecting rollers, preferably Umlenksaugwalzen provided.
  • the material web runs meandering over the cylinder and the guide rollers.
  • a wire belt can be provided which runs together with the material web to the drying cylinder and the guide rollers.
  • the web is thereby supported by the wire, where it occurs at the drying cylinders in direct contact with the cylinder surface, on the guide rollers, however, outside the wire ' lies, and thus is no longer in direct contact with the roll surface.
  • the material web thus always lies against the drying cylinders with only one of its two sides.
  • the material web has sufficient tensile strength to go through a drying group without support by a screen belt or the like.
  • a drying group in which gas-heated drying cylinders are arranged in two rows. The web passes alternately through a drying cylinder of the upper and lower rows, both of which surfaces alternately come into direct contact with a drying cylinder surface.
  • Drying can be assisted by additional drying processes using infrared or hot air.
  • a stream of hot air can be directed onto the surface of the material web, which either flows through it, which is the case with correspondingly permeable materials becomes, or is reflected on it with entrainment of moisture.
  • convection drying In these cases of drying by means of a hot air stream, this is also referred to as convection drying.
  • drying hoods are usually arranged in the peripheral region of the drying cylinder with a heat supply line and a heat removal line, through which the hot air flow is passed.
  • the material web in the initial areas of the drying device is very sensitive due to its high moisture content.
  • steam-heated drying cylinders are usually used with Siebbandunterstützung because their evaporation performance is relatively low, and gentle drying of the web can be achieved.
  • a comparatively high number of steam-heated drying cylinders is required, which increases the space requirements, the building costs, and the maintenance costs.
  • Gas-heated drying cylinders in turn cause comparatively high evaporation rates.
  • a drying path which consists exclusively of gas-heated drying cylinders, would have an unacceptably poor energy efficiency, since not over the entire drying path high evaporation rates are needed.
  • gas-heated drying cylinders can not be used in the initial stages of a drying apparatus where the material web is still very moist and delicate, and high evaporation rates are to be avoided.
  • Claim 1 relates to a drying device for moving material webs, in particular paper, cardboard or fibrous webs, with at least two successive drying groups, each with a plurality of heatable drying cylinders, is provided in accordance with the invention that it is steam-heated at the dryer cylinders of at least a first dryer group Drying cylinder is, wherein for the steam, a first heat cycle is provided, and the drying cylinder at least a second drying group each have a supply line for a combustible energy source, and a derivative for the waste heat from the combustion of the energy carrier, wherein a first heat exchanger is provided, the first heat cycle for the steam of the steam-heated drying cylinder of the at least one, first drying group with the discharge for the waste heat of the drying cylinder of the at least one, second drying group coupled.
  • the device according to the invention thus combines, on the one hand, fuel-heated drying cylinders, with which high evaporation rates can be achieved, with steam-heated drying cylinders having comparatively lower evaporation rates.
  • the latter are usefully used in the beginning sections of the drying device.
  • the invention further provides for passing the steam for the steam-heated drying cylinders in a heating circuit to which the waste heat of the at least one second drying group is fed via a heat exchanger.
  • the construction according to the invention makes it possible to specifically choose different evaporation rates in different sections of the drying device.
  • the first heat exchanger may be a gas-liquid heat exchanger, since the transfer of heat from the gaseous waste heat to the first heat cycle for evaporation from the liquid phase is thermodynamically favorable.
  • a drying hood with a heat supply line and a heat removal line is arranged in the peripheral region of at least one drying cylinder of the at least one second drying group, the heat supply line and the heat removal line form a second heat circuit having a second heat exchanger for the supply of waste heat from the first heat exchanger is connected to the first heat exchanger.
  • the second heat exchanger is an air-to-air heat exchanger.
  • the drying cylinders of the at least one, second drying group have a fresh air supply line with a third heat exchanger, wherein the third Heat exchanger for supplying the waste heat from the second heat exchanger is connected to the second heat exchanger.
  • the third heat exchanger is an air-to-air heat exchanger.
  • a third heat circuit which is coupled on the one hand via a steam separator with the first heat cycle, and on the other hand via a fourth heat exchanger with the fresh air supply line of the at least one second drying group.
  • a steam separator with the first heat cycle
  • a fourth heat exchanger with the fresh air supply line of the at least one second drying group.
  • the warmed, dry fresh air can be used for different purposes.
  • the first and / or second drying group may be at least partially surrounded by a vapor hood, which is connected to the exhaust air line of the heated fresh air of the fourth heat exchanger.
  • a vapor hood which is connected to the exhaust air line of the heated fresh air of the fourth heat exchanger.
  • a corresponding method for drying moving material webs in particular paper, cardboard or fibrous webs, with at least two successive drying groups, each with a plurality of heatable drying cylinders.
  • the drying cylinder at least a first Drying group are heated with steam, which is performed in a first heat cycle
  • the drying cylinder at least a second drying group are heated with a combustible energy source
  • waste heat from the combustion of the energy from the at least one second drying group is supplied to the first heat cycle.
  • waste heat from the combustion of the energy carrier from the at least one, second drying group is fed to an air stream guided in a second heat cycle for air drying of the moving material web.
  • FIG. 1 shows an embodiment of a drying device according to the invention in a schematic representation.
  • the drying device has a first drying group, which is formed from steam-heated drying cylinders 1, and a second drying group, which is formed from gas-heated drying cylinders 2.
  • the steam-heated drying cylinders 1 are arranged in a single row, wherein 1 deflecting rollers 3 are provided below the steam-heated drying cylinder, but the drying cylinder 1 could also be arranged in two rows.
  • the wet web is fed from the left side with reference to FIG. 1, meandering around the steam-heated drying cylinders 1 and the circulating rollers 3, being supported by a screen belt (not visible in FIG. 1). The material web is thus dried within the first drying group only on its underside.
  • the steam-heated drying cylinders 1 can also be provided with blowing nozzles for cleaning the cylinder surfaces, which are also referred to as blowing scrapers.
  • the guide rollers 3 are preferably Umlenksaugwalzen with perforated surface, which thus suck the web or the wire. Furthermore you can additional nozzles for web stabilization, or be provided for easier threading of the web (not shown in Fig. 1).
  • a second drying group is formed from gas-heated drying cylinders 2, which have drying hoods 4 at least partially in their peripheral area.
  • a section is provided in the central region, which is formed on the one hand of single-row, gas-heated drying cylinders 2, as well as with guide rollers 3, which are also associated drying hoods 4. It is also possible to provide overpasses for improved transfer and for easier threading of the material web between the individual sections between this middle region and the first and second dryer groups (not shown in FIG. 1).
  • the gas-heated drying cylinders 2 of the second drying group each have a supply line 5 for a combustible energy source E, and a discharge line 6 for the waste heat from the combustion of the energy carrier E.
  • the waste heat is supplied via the discharge lines 6 to a first heat exchanger 7, which is a gas-liquid heat exchanger.
  • a first heat exchanger 7 In the first heat exchanger 7 while shares of waste heat are transferred to a first heat cycle, wherein condensed steam is converted into the gaseous phase.
  • the first heat cycle comprises a feed train 28, and distribution lines 9, in which steam is supplied to the steam-heated drying cylinders 1 of the first drying group.
  • the first heat cycle comprises manifolds 10, in which the condensate is collected from the steam-heated drying cylinders 1, wherein the vapor remains in the condensate, which is also referred to as blow-through steam.
  • a discharge line 11 of the first heat cycle finally leads the liquid phase back to the first heat exchanger 7.
  • a pressure reducing valve can be provided in the feed train 28 to favor the vapor phase (in the Fig. 1, not shown), and in the Abschreibstrang 11, a compressor 12 for promoting the liquid phase.
  • the first heat exchanger 7 is connected via a pipe to a second heat exchanger 8, in which further portions of the waste heat are transferred to a second heat cycle.
  • the second heat cycle includes heat supply lines 13, the heated drying air supply the drying hoods 4, and heat removal lines 14, which dissipate the moist drying air from the drying hoods 4.
  • a first blower 15 may be provided to produce a circulation in the second heat cycle.
  • a bypass line 16 with a controller 17 is useful.
  • the second heat exchanger 8 is further connected via a pipe to a third heat exchanger 18, in which further portions of the waste heat are transferred to fresh air F, to heat them to about 50-60 0 C.
  • the warmed fresh air is supplied via a fresh air supply line 19 and a blower 20 to the gas-heated drying cylinders 2 of the second drying group.
  • the fresh air supply line 19 is further connected to a fourth heat exchanger 21, in which the heated by means of the third heat exchanger 18 fresh air is further heated, approximately to temperatures of about 100 0 C.
  • the exhaust duct 25 leads the heated to about 100 0 C fresh air through a fan 26 of a hood, which at least partially the first and / or second drying group surrounds.
  • the warmed up, relatively dry fresh air can be used to approximately dissipate the resulting in the course of drying the web of moisture from the hood, but it could also be about for the above-mentioned nozzles for cleaning the cylinder surfaces of the steam-heated drying cylinder 1, or for the web stabilization nozzles.
  • Further blowers 27 serve to remove exhaust air from the entire drying process.
  • a drying device which, on the one hand, enables different evaporation rates in sections, but on the other hand is more energy-efficient than conventional drying devices.
  • the primary energy used with the use of the combustible energy source E is only used there in the course of drying, where high evaporation rates are possible and necessary, but on the other hand enough energy is recovered from the waste heat of the combustion of the energy carrier to heat in the form of steam and hot air there use where lower evaporation rates are required.
  • the drying device according to the invention allows a simpler plant structure, since it is possible to dispense with external steam generation systems for the steam-heated drying cylinder 1, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un dispositif de séchage ainsi qu'un procédé de séchage pour des bandes de matière en mouvement, en particulier des bandes de papier, de carton ou de matière fibreuse. Le dispositif selon l'invention comprend au moins deux groupes de séchage successifs munis respectivement de plusieurs cylindres de séchage (1, 2) pouvant être chauffés. Selon l'invention, les cylindres de séchage (1) d'au moins un premier groupe de séchage sont des cylindres de séchage (1) chauffés à la vapeur, un premier circuit de chaleur étant prévu pour la vapeur, et les cylindres de séchage (2) d'au moins un deuxième groupe de séchage présentent respectivement une conduite d'amenée (5) pour une source d'énergie combustible (E), ainsi qu'une conduite d'évacuation (6) pour la chaleur dissipée provenant de la combustion de la source d'énergie (E). Un premier échangeur de chaleur (7) couple le premier circuit de chaleur pour la vapeur des cylindres de séchage (1) chauffés à la vapeur du premier groupe de séchage avec la conduite d'évacuation (6) pour la chaleur dissipée des cylindres de séchage (2) du deuxième groupe de séchage.
EP09725873A 2008-03-26 2009-03-13 Dispositif et procédé pour sécher des bandes de matière en mouvement Withdrawn EP2268991A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0047208A AT505932B1 (de) 2008-03-26 2008-03-26 Vorrichtung und verfahren zur trocknung bewegter materialbahnen
PCT/AT2009/000103 WO2009117751A1 (fr) 2008-03-26 2009-03-13 Dispositif et procédé pour sécher des bandes de matière en mouvement

Publications (1)

Publication Number Publication Date
EP2268991A1 true EP2268991A1 (fr) 2011-01-05

Family

ID=40600454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09725873A Withdrawn EP2268991A1 (fr) 2008-03-26 2009-03-13 Dispositif et procédé pour sécher des bandes de matière en mouvement

Country Status (5)

Country Link
US (1) US20110035958A1 (fr)
EP (1) EP2268991A1 (fr)
CN (1) CN101981400A (fr)
AT (1) AT505932B1 (fr)
WO (1) WO2009117751A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085617A1 (fr) * 2006-01-25 2007-08-02 Nv Bekaert Sa Secheur a flamme
DE102009000753A1 (de) 2009-02-11 2010-08-12 Voith Patent Gmbh Verfahren und Vorrichtung zur Trocknung einer Faserstoffbahn
CN102901339A (zh) * 2011-07-26 2013-01-30 苏州宏洋纺织染整有限公司 一种烘布装置
CN104738163A (zh) * 2015-04-16 2015-07-01 王雪 一种立筒式连续热风气流真空谷物干燥机
CN105066623A (zh) * 2015-08-20 2015-11-18 孙德敏 松式烘干机废气利用方法及装置
DE102018003969A1 (de) 2018-05-16 2019-11-21 Meri Environmental Solutions Gmbh Verfahren und Vorrichtung zum Trocknen von vorzugsweise einer laufenden Materialbahn mit wenigstens einer mit Biogas beheizten Trocknungseinrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225166A (en) * 1938-10-06 1940-12-17 Christopher Statter Web drying apparatus
DE2446050C3 (de) * 1974-09-26 1978-11-02 J.M. Voith Gmbh, 7920 Heidenheim Trockenpartie für eine Papiermaschine
AT374214B (de) * 1982-03-03 1984-03-26 Stroemungsmasch Anst Einrichtung an dunsthauben der trockenpartie von papiermaschinen
AT382176B (de) * 1984-02-10 1987-01-26 Andritz Ag Maschf Einrichtung an der trockenpartie von papiermaschinen
US5553391A (en) * 1995-06-05 1996-09-10 Bakalar; Sharon F. Method and apparatus for heat treating webs
EP0911445A3 (fr) * 1997-09-29 2000-04-26 Voith Sulzer Papiertechnik Patent GmbH Appareil pour la fabrication ou le traitement d'un matériau en bande
DE19752562A1 (de) * 1997-09-29 1999-04-01 Voith Sulzer Papiertech Patent Maschine zur Herstellung oder Bearbeitung einer Materialbahn
FI120366B (fi) * 2002-03-19 2009-09-30 Metso Paper Inc Menetelmä ja laitteisto käyttövoiman tuottamiseksi paperi- tai kartonkilaitoksessa

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009117751A1 *

Also Published As

Publication number Publication date
WO2009117751A1 (fr) 2009-10-01
CN101981400A (zh) 2011-02-23
AT505932A4 (de) 2009-05-15
AT505932B1 (de) 2009-05-15
US20110035958A1 (en) 2011-02-17

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