EP1347096B1 - Device for drying paper webs, in paticular tissue paper webs - Google Patents
Device for drying paper webs, in paticular tissue paper webs Download PDFInfo
- Publication number
- EP1347096B1 EP1347096B1 EP03005020A EP03005020A EP1347096B1 EP 1347096 B1 EP1347096 B1 EP 1347096B1 EP 03005020 A EP03005020 A EP 03005020A EP 03005020 A EP03005020 A EP 03005020A EP 1347096 B1 EP1347096 B1 EP 1347096B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hood
- nozzle basket
- paper webs
- drying
- hood frame
- 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
Links
- 238000001035 drying Methods 0.000 title claims description 21
- 238000007599 discharging Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
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
- D21F5/181—Drying webs by hot air on Yankee cylinder
-
- 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
Definitions
- the invention relates to a device for drying paper webs, in particular tissue paper webs, with a drying cylinder, which is wrapped by a drying hood for blowing hot air, a hot air supply, which opens into a nozzle basket and located around the nozzle basket around hood frame.
- Such systems are also called Yankee cylinders and Yankee hoods and have been used for a long time in the field of tissue paper production.
- drying hoods with temperatures up to about 500 ° C in use, with restrictions being mainly due to the material.
- disadvantages also occur due to different distances between the drying cylinder and the drying hood during operation, which lead to uneven drying.
- the EP 0 905 311 A2 discloses a device with a high-temperature hood according to the preamble of claim 1. This drying hood is intended for temperatures above 1000 ° F (about 538 ° C). The individual exhaust nozzles are here decoupled from the side walls of the hood frame. This allows expansion across the machine direction
- the aim of the invention is thus to provide a device for efficient, uniform drying of a paper web, in particular tissue paper web, at high temperatures.
- the hot air supply and the nozzle basket are decoupled from the hood frame.
- the nozzle basket is rotatably mounted in an upper point in the housing and slidably mounted in a lower point in the hood frame, thus the nozzle basket and hood frame are freely movable relative to each other.
- the lower (support) point can be adjustable.
- the housing and the nozzle basket are fixed at different sides (drive side or guide side) transversely to the paper web, the extent transverse to the paper web can be minimized.
- a drive unit and a distance sensor are provided. It is particularly advantageous if the distance between the drying hood and the drying cylinder during operation at high blow-out temperatures, in particular above 550 ° C., for example up to 700 ° C., is substantially the same everywhere substantially.
- Fig. 1 schematically the construction of a dryer with drying cylinder and drying hood
- Fig. 2 a hood half in cold condition
- Fig. 3 a hood half analog Fig. 2 , but with a warm jet basket
- Fig. 4 an analogue view with warm jet basket and warm hood frame
- Fig. 5 the area of a support of the hood
- Fig. 6 represents the area of another support of the hood.
- Fig. 1 shows the schematic structure of a drying plant for paper, especially tissue paper. The paper web is guided around a drying cylinder 1, which is looped around by a first hood half 2 and a second hood half 3.
- the hot air temperatures today move at about 300 ° C to 500 ° C resulting in a water evaporation of about 90 kg w / m 2 h or 160 kg w / m 2 h.
- the aim is, however, to increase the discharge temperature to 600 ° C or 700 ° C, resulting in water evaporation rates of over 200 kg w / m 2 h. At these high temperatures, however, the thermal expansion of the hood leads to unwanted geometric conditions.
- Fig. 2 is the second hood half 3 a drying system shown. It can be seen the hot air supply 4 and the exhaust duct 5.
- the Hot air line 4 opens into the nozzle basket 9 and flows through a series of nozzles on the paper running on the drying cylinder 1.
- the hood frame 10 is located around the nozzle basket 9. In the cold state of the nozzle basket 9 and hood frame 10, the hood crown 11 has a smaller spacing than the hood end 12 in order to achieve the best possible hood distance from the cylinder during operation.
- the thermal expansion is in Fig.
- nozzle basket 9 is heated to approximately 600 - 700 ° C during the starting process.
- the upper limit here is merely the material properties of the sheets used.
- nozzle basket 9 and hood frame 10 are decoupled from each other.
- the nozzle basket 9 is now mounted in the region of the apex 11 in a bearing 13 rotatably mounted on the main carrier of the hood frame 10. In the lower hood area, the nozzle basket 9 slidably rests on another carrier 14.
- Fig. 4 now shows the state in which the hood frame 10 heats up.
- the upper bearing 13 is moved in the direction of the arrow 18, ie to the other hood half. This increases the distance between the hood and the cylinder.
- the entire hood half 3 is displaced in the direction 18 ', so that the distance here goes back again.
- the sliding bearing 14 is arranged displaceably and adjustably in a slot 19.
- a drive is provided here, the distance can always be set optimally even when the system is in operation.
- Fig. 5 the adjustment is shown in more detail, with different positions, resulting in particular by the thermal expansion, are located.
- the solid lines represent the state at operating temperature and the dashed lines in the cold state.
- the lower support 14 of the nozzle basket 9 which is designed to slide, the bearing in the hood frame 10 in a slot 19 Verschieb- or .
- Fig. 6 shows the displacement of the upper bearing 13 by the extension of the hood frame 10 and displacement in the direction of the cylinder center. About the rotatable hinge 13, the hood frame 10 then pulls the nozzle basket 9 with.
- the material used for the frame is usually stainless steel (1.4571) or Corten A.
- For the nozzle basket a material is used which has sufficient strength even at high temperatures, such. B. 1.4835.
- the hood frame 10 is fixed on the drive side of the paper machine and the nozzle basket 9 on the leader side of the machine. Again, the expansion is minimized by the different locations of fixation.
Landscapes
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Trocknen von Papierbahnen, insbesondere Tissuepapierbahnen, mit einem Trockenzylinder, welcher von einer Trockenhaube zur Aufblasung von Heißluft umschlungen wird, einer Heißluftzufuhr, welche in einen Düsenkorb mündet und einem um den Düsenkorb herum befindenden Haubengestell.The invention relates to a device for drying paper webs, in particular tissue paper webs, with a drying cylinder, which is wrapped by a drying hood for blowing hot air, a hot air supply, which opens into a nozzle basket and located around the nozzle basket around hood frame.
Derartige Anlagen werden auch Yankeezylinder und Yankeehaube genannt und seit langem im Bereich der Tissuepapiererzeugung eingesetzt. Zur Erzielung einer hohen Durchsatzleistung sowie einer guten Qualität werden hohe Ausblastemperaturen der Heißluft benötigt. Zur Zeit sind Trockenhauben mit Temperaturen bis zu ca. 500 °C im Einsatz, wobei Beschränkungen vor allem durch das Material gegeben sind. Insbesondere treten auch Nachteile durch unterschiedliche Abstände zwischen Trockenzylinder und Trockenhaube während des Betriebes auf, die zu ungleichmäßiger Trocknung führen.Such systems are also called Yankee cylinders and Yankee hoods and have been used for a long time in the field of tissue paper production. To achieve a high throughput and a good quality high blow-out temperatures of the hot air are needed. At present, drying hoods with temperatures up to about 500 ° C in use, with restrictions being mainly due to the material. In particular, disadvantages also occur due to different distances between the drying cylinder and the drying hood during operation, which lead to uneven drying.
Die
Ziel der Erfindung ist es somit eine Vorrichtung zur effizienten, gleichmäßigen Trocknung einer Papierbahn, insbesondere Tissuepapierbahn, bei hohen Temperaturen zu schaffen.The aim of the invention is thus to provide a device for efficient, uniform drying of a paper web, in particular tissue paper web, at high temperatures.
Dies erfolgt erfindungsgemäß dadurch, dass die Heißluftzufuhr und der Düsenkorb vom Haubengestell entkoppelt sind. Durch diese Entkoppelung wird eine freie Bewegung der heißen Bauteile, wie Düsenkorb und Zuluftkanal möglich. Erfindungsgemäß wird der Düsenkorb in einem oberen Punkt im Gehäuse drehbar und in einem unteren Punkt im Haubengestell gleitend gelagert, somit sind Düsenkorb und Haubengestell frei gegeneinander bewegbar. Der untere (Auflage-) Punkt kann einstellbar sein.This is done according to the invention in that the hot air supply and the nozzle basket are decoupled from the hood frame. By this decoupling a free movement of the hot components, such as nozzle basket and supply air duct is possible. According to the invention, the nozzle basket is rotatably mounted in an upper point in the housing and slidably mounted in a lower point in the hood frame, thus the nozzle basket and hood frame are freely movable relative to each other. The lower (support) point can be adjustable.
Dadurch ist eine freie Bewegung des Düsenkorbes während der Aufheizung bzw. Abkühlung möglich, ohne Spannungen zu erzeugen und es kann immer ein gleichmäßiger, gegebenenfalls auch einstellbarer, Abstand zwischen Zylinder und Haube erzielt werden. Wenn vorteilhafterweise das Gehäuse und der Düsenkorb an unterschiedlichen Seiten (Triebseite bzw. Führerseite) quer zur Papierbahn fixiert sind, kann die Ausdehnung quer zur Papierbahn minimiert werden.As a result, a free movement of the nozzle basket during heating or cooling is possible without generating stresses and it can always be a uniform, possibly adjustable, distance between the cylinder and hood can be achieved. If, advantageously, the housing and the nozzle basket are fixed at different sides (drive side or guide side) transversely to the paper web, the extent transverse to the paper web can be minimized.
Soll zusätzlich eine Verstellmöglichkeit des Abstandes zwischen Trockenzylinder und Trockenhaube während des Betriebes erreicht werden, werden erfindungsgemäß eine Antriebseinheit und ein Abstandsensor vorgesehen.
Besonders vorteilhaft ist es, wenn der Abstand zwischen Trockenhaube und Trockenzylinder im Betrieb bei hohen Ausblastemperaturen, insbesondere über 550 °C, beispielsweise bis zu 700 °C, im wesentlichen überall gleich groß ist.If an additional adjustment of the distance between the drying cylinder and dryer hood during operation achieved be, according to the invention, a drive unit and a distance sensor are provided.
It is particularly advantageous if the distance between the drying hood and the drying cylinder during operation at high blow-out temperatures, in particular above 550 ° C., for example up to 700 ° C., is substantially the same everywhere substantially.
Die Erfindung wird nun anhand der Zeichnungen beispielhaft beschrieben, wobei
In
Die Wärmeausdehnung wird in
In
Als Material für das Gestell wird üblicherweise rostfreier Stahl (1.4571) oder Corten A verwendet. Für den Düsenkorb wird ein Material eingesetzt, das auch bei den hohen Temperaturen ausreichende Festigkeiten aufweist, wie z. B. 1.4835.
Um die Ausdehnungen quer zur Papierbahn zu minimieren, wird das Haubengestell 10 auf der Triebseite der Papiermaschine und der Düsenkorb 9 auf der Führerseite der Maschine fixiert. Auch hier wird die Ausdehnung durch die unterschiedlichen Orte der Fixierung minimiert.The invention will now be described by way of example with reference to the drawings, in which:
In
The thermal expansion is in
In
The material used for the frame is usually stainless steel (1.4571) or Corten A. For the nozzle basket, a material is used which has sufficient strength even at high temperatures, such. B. 1.4835.
In order to minimize the dimensions across the paper web, the
Claims (5)
- Device for drying paper webs, especially tissue paper webs, with- a dryer cylinder (1), which is wrapped by a dryer hood (2, 3) for impingement of hot air;- a hot air feed (4), discharging into a nozzle basket (9), and- a hood frame (10) around the nozzle basket (9),characterised by the hot air feed (4) and the nozzle basket (9) being uncoupled from the hood frame (10), with the nozzle basket (9) being supported pivotable at an upper point (13) in the hood frame (10) and being supported sliding at a lower point (14) in the hood frame (10), so that the nozzle basket (9) is movable in relation to the hood frame (10).
- Device according to Claim 1, characterised by the lower support point (14) being adjustable.
- Device according to one of the Claims 1 or 2, characterised by the hood frame (10) and the nozzle basket (9) being fixed at different sides, such as drive side and front side, respectively, crosswise to the paper web.
- Device according to one of the Claims 1 to 3, characterised by a drive unit and a gap sensor being provided for adjustment of the gap between the dryer cylinder (1) and the dryer hood (2, 3) during operation.
- Device according to one of the Claims 1 to 4, characterised by the gap between the dryer hood (2, 3) and the dryer cylinder (1) being essentially uniform at all points in operation at high impingement temperatures, especially above 550°C, for instance up to 700°C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT03005020T ATE438759T1 (en) | 2002-03-19 | 2003-03-06 | DEVICE FOR DRYING PAPER WEAVES, IN PARTICULAR TISSUE PAPER WEAVES |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT4112002 | 2002-03-19 | ||
AT0041102A AT411274B (en) | 2002-03-19 | 2002-03-19 | DEVICE FOR DRYING PAPER FILMS, IN PARTICULAR TISSUE PAPER FILMS |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1347096A2 EP1347096A2 (en) | 2003-09-24 |
EP1347096A3 EP1347096A3 (en) | 2005-07-13 |
EP1347096B1 true EP1347096B1 (en) | 2009-08-05 |
Family
ID=3673766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03005020A Expired - Lifetime EP1347096B1 (en) | 2002-03-19 | 2003-03-06 | Device for drying paper webs, in paticular tissue paper webs |
Country Status (7)
Country | Link |
---|---|
US (1) | US7363725B2 (en) |
EP (1) | EP1347096B1 (en) |
AT (2) | AT411274B (en) |
CA (1) | CA2420798C (en) |
DE (1) | DE50311768D1 (en) |
ES (1) | ES2329884T3 (en) |
MX (1) | MXPA03002427A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014029719A1 (en) * | 2012-08-20 | 2014-02-27 | Voith Patent Gmbh | Dryer hood |
ITFI20130241A1 (en) * | 2013-10-15 | 2015-04-16 | Celli Paper S P A A | "PLANT COMPONENTS FOR THE PRODUCTION OF DAMP PAPER" |
DE102017103422A1 (en) * | 2017-02-20 | 2018-08-23 | Voith Patent Gmbh | Drying hood, drying arrangement and use of such |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1233585A (en) * | 1958-04-22 | 1960-10-12 | Winterburn Ltd Joseph | Improvements to drying cylinders for machines such as paper machines |
US3163502A (en) * | 1960-10-13 | 1964-12-29 | Beloit Corp | Removable hood for a drying cylinder |
US5410819A (en) * | 1994-03-18 | 1995-05-02 | James River Paper Company, Inc. | Mounting system for paper dryer nozzle box |
US5531033A (en) * | 1994-10-18 | 1996-07-02 | Asea Brown Boveri, Inc. | Controlled profile drying hood |
CA2216591C (en) | 1997-09-24 | 2004-05-11 | Asea Brown Boveri Inc. | High temperature yankee hood |
-
2002
- 2002-03-19 AT AT0041102A patent/AT411274B/en not_active IP Right Cessation
-
2003
- 2003-02-27 CA CA2420798A patent/CA2420798C/en not_active Expired - Fee Related
- 2003-03-06 ES ES03005020T patent/ES2329884T3/en not_active Expired - Lifetime
- 2003-03-06 EP EP03005020A patent/EP1347096B1/en not_active Expired - Lifetime
- 2003-03-06 DE DE50311768T patent/DE50311768D1/en not_active Expired - Lifetime
- 2003-03-06 AT AT03005020T patent/ATE438759T1/en not_active IP Right Cessation
- 2003-03-19 MX MXPA03002427A patent/MXPA03002427A/en active IP Right Grant
- 2003-03-19 US US10/392,460 patent/US7363725B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2329884T3 (en) | 2009-12-02 |
DE50311768D1 (en) | 2009-09-17 |
US7363725B2 (en) | 2008-04-29 |
ATA4112002A (en) | 2003-04-15 |
EP1347096A2 (en) | 2003-09-24 |
EP1347096A3 (en) | 2005-07-13 |
MXPA03002427A (en) | 2004-02-12 |
ATE438759T1 (en) | 2009-08-15 |
CA2420798C (en) | 2011-02-01 |
CA2420798A1 (en) | 2003-09-19 |
US20030177660A1 (en) | 2003-09-25 |
AT411274B (en) | 2003-11-25 |
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