EP0989233B1 - Trockenpartie sowie Konvektionstrockner für eine solche Trockenpartie - Google Patents
Trockenpartie sowie Konvektionstrockner für eine solche Trockenpartie Download PDFInfo
- Publication number
- EP0989233B1 EP0989233B1 EP99113191A EP99113191A EP0989233B1 EP 0989233 B1 EP0989233 B1 EP 0989233B1 EP 99113191 A EP99113191 A EP 99113191A EP 99113191 A EP99113191 A EP 99113191A EP 0989233 B1 EP0989233 B1 EP 0989233B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drying
- convection dryer
- web
- drying section
- dryer according
- 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
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Classifications
-
- 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
- D21F5/18—Drying webs by hot air
-
- 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
- D21F5/18—Drying webs by hot air
- D21F5/185—Supporting webs in hot air dryers
Definitions
- the invention relates to a convection dryer for treating a material web, in particular a paper or cardboard web, in particular for use in a Dryer section, wherein it has several drying sections through which the Material web passed between two air-permeable sieve belts and in which the Material web on both sides through the sieve belts with hot air and / or superheated steam is acted upon.
- WO 97/13031 describes a convection dryer of the type described in the introduction disclosed.
- the vertical arrangement of the drying sections can, however, with regard to Do not satisfy compactness.
- the aim of the invention is to provide a convection dryer of the type mentioned create at the same time with the best possible drying rate and thus the smallest possible overall length of the dryer section is possible as well as safe Web guidance is guaranteed.
- the object was achieved in that he has at least two general drying sections arranged one above the other.
- the overall length can be significantly reduced by such a multi-level arrangement, in connection with the drying on both sides in particular also undesirable bilateralism is avoided.
- the drying party should include at least one conventional dryer, at least has a drying section through which the material web between two air-permeable sieve belts and in which the material web on one or both sides hot air and / or hot steam can be applied through the sieve belts.
- the Paper warms as long as it is sufficiently damp not significantly above the cooling limit temperature. moreover can with the more flexible and faster adjustable convection dryer affects paper quality better become. So is at the beginning of the drying phase targeted heating and drying in particular a correction of moisture cross profiles is also possible. After no more pressing on heating surfaces hindrance to shrinkage is also required low at the beginning of drying, which has a positive effect on the Cockling tendency can affect.
- the compared to heat transfer over smooth contact surfaces lower heat transfer coefficient during convection is due to a higher temperature difference and the drying on both sides balanced or even overcompensated.
- the convection dryer comprises at least one in Direction of web travel considered at least essentially straight or slightly curved drying section, which always ensures safe and precise guidance is guaranteed.
- the convection dryer can handle the material web enclose at least partially on the side. By doing thereby avoiding that the exhaust air is colder Ambient air mixed, this exhaust air at high Temperature can be used further.
- the convection dryer has several Drying sections, they can in particular in terms of their heat output, at least in part be controllable separately. So it's a total of one more sensitive influencing of the material web possible.
- the convection dryer can be used for moisture profiling expediently at least one across drying section divided into zones to the web running direction exhibit. Alternatively or additionally it is also conceivable, at least the respective drying hoods to be subdivided partially in the direction of web travel.
- a closed web guide favors in particular the previously mentioned multi-level arrangement of several in general drying sections arranged one above the other.
- a web redirection following a respective drying section is preferably carried out by a respective screen suction roll, of which the respective outer one, which is led through the preceding drying section Screen belt is removed, so that a shear of the material web is avoided.
- the material web is expediently in at least one Drying section of the convection dryer with hot air and / or Superheated steam, the temperature of which is in a range of about 150 to about 450 ° C and in particular about 200 to about 400 ° C.
- the material web is at least a drying section of the convection dryer with hot air and / or superheated steam, whose flow rate in a range of about 60 to about 120 m / s, especially about 90 to 110 m / s, and preferably in the range of 100 m / s.
- the dryer section is at least one convection dryer in the direction of web travel arranged in front of a single or double-row cylinder dryer group, the web of material upon reaching the first drying cylinder this drying group preferably up to a dry content in the Range from about 55 to about 65% is dried.
- the convection dryer can thus in particular directly at the beginning or in an initial area of the dryer section after one or more Cylinders may be provided.
- at least one such convection dryer in a main evaporation zone and / or to be provided in the end region of the dryer section This results in an even higher drying rate, which means that Drying section overall is further shortened.
- Such a convection dryer 10 is particularly suitable for use in the dryer section of a machine for producing a material web in question 12 suitable, in the following such a convection dryer in particular a single or double-row cylinder dryer group can be provided.
- the material web 12 becomes, for example, with a dry content from about 45 to 55% fed to the convection dryer 10 and with a dry matter content of about 60 to about 65% to the cylinder drying group to hand over.
- the material web 12 can be The beginning and / or end of the convection dryer 10, however, also others Have dry contents.
- the convection dryer comprises 10 three straight or slightly curved one above the other Drying sections 18 to 22 and an adjoining, arranged next to this first group of drying sections another straight-line or slightly curved drying section 24.
- the one between the two horizontal drying sections 18 and 22 provided inclined drying section 20 runs from the bottom to above, i.e. the material web 12 is from bottom to top through this passed middle drying section 20.
- the convection dryer according to the invention can also be used in another Configuration from the described straight or slightly curved Drying sections can be composed.
- the material web 12 is in each case between two air-permeable sieve belts 26, 28; 28, 30; 30, 32; or 32, 34 through the straight line Drying sections 18 to 24 of the convection dryer 10 are passed through, being on both sides in each drying section 18 to 24 through the relevant sieve belts with hot air and / or Superheated steam is applied.
- the drying sections 18 to 24 are each between two Drying or nozzle hoods 36, 36 '; 38, 38 '; 40, 40 'and 42, 42' respectively. As indicated by corresponding arrows in FIG. 1, each is of these drying hoods 36 to 42 and 36 'to 42' each at the same time steam or air extraction. Each of these drying hoods can thus be provided with suction openings, for example the steam or moist air directly in the area in question is suctioned off.
- the drying hoods 36 to 42 and 36 'to 42' can the material web 12 also enclose on the side. After thus preventing the Exhaust air is mixed with colder ambient air, this exhaust air can relatively high temperature can be used.
- the drying sections 18 to 24 can in particular with regard their heat output can be controlled at least partially separately. moreover they can be used for moisture profiling across the web running direction L in zones be divided.
- the web deflection following the drying sections 18 to 24 takes place in each case by a screen suction roller 44 to 50, of which the outer, through the preceding drying section 18 to 24 sieve belt 26, 28, 32 and 30 is removed.
- the sieve belts 26 to 34 are also in the manner shown in FIG. 1 via deflection rollers 52 guided. While the sieve belts 26, 32 and 34 each only one Drying section 18, 22 and 24 are assigned, are the two Sieve belts 28 and 30 each through two drying sections 18 and 20 or 20 and 24 passed through. As can be seen from the figure 1 the sieve belt 30 is before entering the drying section 20 additionally guided over a support roller 54.
- the sieve belt 34 is in the connection to the last drying section 24 via the screen suction roll 50 on the first drying cylinder 14 of the single-row cylinder drying group given.
- the convection dryer can in particular also directly at the beginning or in an initial area of the dryer section after a or more cylinders 14 may be provided.
- the sieve belts 34, 26 and 28 and the material web 12 for example in the figure 2 shown manner.
Landscapes
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Description
- Figur 1
- in rein schematischer Darstellung ein erstes Ausführungsbeispiel eines Konvektionstrockner 10 zur Behandlung einer Materialbahn 12, im vorliegenden Fall einer Papier- oder Kartonbahn, und
- Figur 2
- eine weiteres Ausführungsbeispiel eines Konvektionstrockners.
- 10
- Konvektionstrockner
- 12
- Materialbahn
- 14
- Trockenzylinder
- 16
- Siebsaugwalze
- 18
- Trocknungsabschnitt
- 20
- Trocknungsabschnitt
- 22
- Trocknungsabschnitt
- 24
- Trocknungsabschnitt
- 26
- Siebband
- 28
- Siebband
- 30
- Siebband
- 32
- Siebband
- 34
- Siebband
- 36
- Trocknungshaube
- 36'
- Trocknungshaube
- 38
- Trocknungshaube
- 38'
- Trocknungshaube
- 40
- Trocknungshaube
- 40'
- Trocknungshaube
- 42
- Trocknungshaube
- 42'
- Trocknungshaube
- 44
- Siebsaugwalze
- 46
- Siebsaugwalze
- 48
- Siebsaugwalze
- 50
- Siebsaugwalze
- 52
- Umlenkrollen
- 54
- Stützrolle
- L
- Bahnlaufrichtung
Claims (9)
- Konvektionstrockner (10) zur Behandlung einer Materialbahn (12), insbesondere einer Papier- oder Kartonbahn, insbesondere zur Verwendung in einer Trockenpartie, wobei er mehrere Trocknungsabschnitte (18 - 24) aufweist, durch die die Materialbahn (12) zwischen zwei luftdurchlässigen Siebbändem (26 - 34) hindurchgeführt und in denen die Materialbahn (12) beidseitig durch die Siebbänder (26 - 34) hindurch mit Heißluftund/oder Heißdampf beaufschlagbar ist, dadurch gekennzeichnet, daß er wenigstens zwei allgemein übereinander angeordnete Trocknungsabschnitte (18 - 22) umfaßt.
- Konvektionstrockner nach Anspruch 1, dadurch gekennzeichnet daß er wenigstens einen in Bahnlaufrichtung (L) betrachtet zumindest im wesentlichen geradlinigen oder leicht gekrümmten Trocknungsabschnitt (18 - 24) aufweist.
- Konvektionstrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens ein Trocknungsabschnitt (18 - 24) zwischen zwei Trocknungs- oder Düsenhauben (36, 36' - 42, 42') gebildet ist.
- Konvektionstrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß er wenigstens eine Trocknungshaube (36, 36' - 42, 42') aufweist, die zugleich mit einer Dampf oder Luftabsaugung versehen ist.
- Konvektionstrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß er die Materialbahn (12) zumindest teilweise seitlich umschließt.
- Konvektionstrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß er mehrere Trocknungsabschnitte (18 - 24) umfaßt und daß die Trocknungsabschnitte (18 - 24) insbesondere hinsichtlich ihrer Heizleistung zumindest teilweise getrennt steuerbar sind.
- Konvektionstrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß er wenigstens einen quer zur Bahnlaufrichtung (L) in Zonen unterteilten Trocknungsabschnitt (18 - 24) umfaßt.
- Konvektionstrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine durchgehend geschlossene Bahnführung vorgesehen ist.
- Konvektionstrockner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine jeweilige Bahnumlenkung im Anschluß an einen jeweiligen Trocknungsabschnitt (18 - 24) durch eine jeweilige Siebsaugwalze (44 - 50) erfolgt, von der das jeweils äußere, durch den vorangehenden Trocknungsabschnitt (18 - 24) geführte Siebband (26, 28, 32, 30) abgenommen wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19841767A DE19841767A1 (de) | 1998-09-11 | 1998-09-11 | Trockenpartie sowie Konvektionstrockner für eine solche Trockenpartie |
DE19841767 | 1998-09-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0989233A2 EP0989233A2 (de) | 2000-03-29 |
EP0989233A3 EP0989233A3 (de) | 2000-12-27 |
EP0989233B1 true EP0989233B1 (de) | 2004-10-13 |
Family
ID=7880732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99113191A Expired - Lifetime EP0989233B1 (de) | 1998-09-11 | 1999-07-08 | Trockenpartie sowie Konvektionstrockner für eine solche Trockenpartie |
Country Status (3)
Country | Link |
---|---|
US (1) | US6237248B1 (de) |
EP (1) | EP0989233B1 (de) |
DE (2) | DE19841767A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6526434B1 (en) * | 1999-08-24 | 2003-02-25 | International Business Machines Corporation | System and method for efficient transfer of data blocks from client to server |
DE19944266A1 (de) * | 1999-09-15 | 2001-03-22 | Voith Paper Patent Gmbh | Verfahren zum Trocknen einer Materialbahn |
DE10024358A1 (de) * | 2000-05-17 | 2001-11-22 | Voith Paper Patent Gmbh | Trockenpartie |
FI118811B (fi) * | 2000-11-06 | 2008-03-31 | Metso Paper Inc | Päällepuhalluskuivatusyksikkö ja kuivatusosa |
DE10350159A1 (de) * | 2003-10-28 | 2005-06-02 | Voith Paper Patent Gmbh | Vorrichtung zur Entwässerung einer Faserstoffbahn |
DE102005025256A1 (de) * | 2005-06-02 | 2006-12-07 | Voith Patent Gmbh | Vorrichtung zur Herstellung einer Faserstoffbahn |
US8152967B2 (en) * | 2006-08-25 | 2012-04-10 | Graf Edwin X | Process and machine for making air dried tissue |
US20080193890A1 (en) * | 2007-02-08 | 2008-08-14 | Rogers James H | Textile Curing Oven With Active Cooling |
DE102008029432B3 (de) * | 2008-06-23 | 2009-09-17 | Prinovis Ltd. & Co. Kg | Trocknungsanlage für durchlaufende Warenbahnen in Form von bedruckten und/oder beschichteten Papierbahnen |
WO2016020866A1 (de) * | 2014-08-06 | 2016-02-11 | Basf Se | Verfahren zur kontinuierlichen beschichtung einer cellulose-basierten faserstoffsubstratbahn mit fettsäurechlorid |
CN104805618B (zh) * | 2015-04-13 | 2017-03-22 | 太仓安佑无纺科技有限公司 | 一种直立棉多层对流立式烘燥装置 |
WO2017066761A1 (en) * | 2015-10-15 | 2017-04-20 | Jimmyash Llc | Method and apparatus for the controlled conveyance of a workpiece through a fluidized bed dryer |
US20210146680A1 (en) * | 2018-04-30 | 2021-05-20 | Kimberly-Clark Worldwide, Inc. | Air dryer utilizing low temperature, high velocity air |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE596882C (de) * | 1931-02-04 | 1934-05-12 | Peter Tidemand Malling Brandt | Vorrichtung zum Trocknen von Faserstoffbahnen, insbesondere Papier- und Pappbahnen |
CA937046A (en) * | 1968-02-15 | 1973-11-20 | J. Cirrito Anthony | Method and apparatus for hot gas heat transfer, particularly for paper drying |
US4498864A (en) * | 1982-12-10 | 1985-02-12 | Techmark Corporation | Method and apparatus for uniformly drying moving webs |
DE3615152A1 (de) * | 1986-05-05 | 1987-11-12 | Pierkes Heinz Willi | Trockenpartie einer papiermaschine |
FI82097C (fi) * | 1989-02-17 | 1991-01-10 | Valmet Paper Machinery Inc | Maongcylindertork i en pappersmaskin. |
DE4131636C2 (de) * | 1991-09-23 | 1999-04-22 | Brueckner Trockentechnik Gmbh | Tragbandtrockner zur Heißluftbehandlung einer breitgeführten textilen Warenbahn |
US5303484A (en) * | 1992-04-09 | 1994-04-19 | Thermo Electron Web Systems, Inc. | Compact convective web dryer |
US5588223A (en) * | 1994-06-14 | 1996-12-31 | Asea Brown Boveri Inc. | Restrained paper dryer |
FI102623B (fi) * | 1995-10-04 | 1999-01-15 | Valmet Corp | Menetelmä ja laite paperikoneessa |
US6004430A (en) | 1995-10-04 | 1999-12-21 | Ilvespaa; Heikki | Method and device for enhancing the run of a paper web in a paper machine |
-
1998
- 1998-09-11 DE DE19841767A patent/DE19841767A1/de not_active Withdrawn
-
1999
- 1999-07-08 DE DE1999510817 patent/DE59910817D1/de not_active Expired - Fee Related
- 1999-07-08 EP EP99113191A patent/EP0989233B1/de not_active Expired - Lifetime
- 1999-09-10 US US09/393,152 patent/US6237248B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6237248B1 (en) | 2001-05-29 |
DE19841767A1 (de) | 2000-03-16 |
EP0989233A3 (de) | 2000-12-27 |
DE59910817D1 (de) | 2004-11-18 |
EP0989233A2 (de) | 2000-03-29 |
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