EP1236829B1 - Impingement dryer - Google Patents
Impingement dryer Download PDFInfo
- Publication number
- EP1236829B1 EP1236829B1 EP01125932A EP01125932A EP1236829B1 EP 1236829 B1 EP1236829 B1 EP 1236829B1 EP 01125932 A EP01125932 A EP 01125932A EP 01125932 A EP01125932 A EP 01125932A EP 1236829 B1 EP1236829 B1 EP 1236829B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dryer according
- supporting belt
- impingement dryer
- cooling
- impingement
- 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
- 238000001816 cooling Methods 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000009835 boiling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000000605 extraction Methods 0.000 claims 1
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003685 thermal hair damage 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
-
- 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 an impingement dryer for drying a paper, board, tissue or another fibrous web, according to the preamble of present claim 1.
- Such impingement dryer are known for example from US-A-5588223, US-A-4361466 or DE 19841768 A1, where they are part of the dryer section of a paper machine.
- the temperature of the hot air or of the superheated steam can reach values between 300 ° and 500 ° C.
- the temperature resistance of the candidate support bands in particular because of the plastic content between 140 and 240 ° C.
- the fibrous web relative to the support band is a sufficient thermal insulation, are essentially only the uncovered areas of the support band, d. H. the edges are thermally endangered.
- the width of the impingement dryer is limited to the web width, which, however, brings difficulties or a considerable effort with changing width of the fibrous web with it.
- the object of the invention is therefore to provide a simple thermal protection of the support band without significantly affecting the drying of the fibrous web.
- the cooling of the support belt takes place after the delivery of the fibrous web from this to a following unit.
- the edge of the support band is cooled in a range between 50 and 1000 mm.
- the cooling of the support belt takes place in different degrees in cooling zones delimited transversely to the web running direction. This allows adaptation of the necessary cooling intensity, for example, to the local temperature of the support band. Advantages also arise when the cooling zones associated cooling capacity is controlled separately.
- the cooling of the support belt is effected by at least one cooling device in the form of liquid and / or compressed air nozzles.
- the liquid nozzles should be supplied with a liquid whose boiling point is below the maximum allowable temperature of the support band, preferably water or alcohols, for example polyethylene glycol.
- This evaporative cooling prevents sufficient liquid supply that the temperature of the support belt rises above the boiling temperature of the liquid.
- the liquid bounced off the support belt and / or liquid mist emanating therefrom should be removed from guide elements and / or catching devices and / or suction devices.
- the pressure and / or the throughput of the liquid and / or compressed-air nozzles should preferably be controllable individually or in zones.
- temperature sensors for measuring the temperature of the support belt in the web running direction before and under circumstances but also after the cooling device helpful which should be arranged in particular with respect to the edge of the support band.
- the support band should be designed as a sieve.
- it is to ensure a stable running of the support belt and thus the fibrous web and in terms of the distance to the impingement dryer advantageous when the support belt is guided during the application of the fibrous web with the hot air and / or superheated steam flow over a rotating support roller.
- a structurally simple solution results when the hot air and / or hot steam impact flow is generated by a drying hood arranged in a peripheral region of the support roller.
- the cooling of the support band according to the invention can also be used in hot air suspended dryers.
- the cooling of the support band can take place outside the area leading the fibrous web, if necessary, at several points along the run of the support band.
- the impingement dryer is part of a paper machine for drying the fibrous web 1 and is essentially formed by a rotating support roller 7 and a drying hood 8.
- the drying hood 8 is arranged at a distance of a few centimeters to the support roller 7 and extends over a substantial part of the circumference of the support roller. 7
- the support roller 7 is looped around by an endlessly circulating support belt 2 in the form of a dryer fabric and the outer fibrous web 1. From the arranged in the wrap drying hood 8, the impingement of the fibrous web 1 takes place with hot air, which leads to the drying of the fibrous web 1. For this purpose, several directed to the fibrous web 1 nozzles are present in the dryer hood 8.
- the support belt 2 is inevitably wider than the fibrous web 1. This leads, in particular with changing width of the fibrous web 1 to an edge zone of the support belt 2 directly, d. H. is exposed without intermediate fibrous web 1 of the hot air, which may cause the same due to the plastic content in the support band 2 to thermal damage.
- the support belt 2 passes the fibrous web 1 from the support roller 7 to a, surrounded by an air-permeable sieve 10 and sucked guide roller 9.
- the guide roller 9 supported by the negative pressure, the transfer of the fibrous web 1 to the wire 10th
- the support belt 2 After delivery of the fibrous web 1, the support belt 2 is cooled over its entire width by a cooling device in the form of water nozzles 4. In this case, the hot air directly exposed edge zone of the support belt 2 is particularly strongly cooled.
- the water nozzles 4 are in a support band 2 towards open hood and are arranged in several transverse to the web running direction 3, one behind the other rows.
- the cooling of the support belt 2 takes place in different directions perpendicular to the web running direction 3 delimited cooling zones.
- the water nozzles 4 of the respective cooling zone are connected to a common pressure line 11 that can be controlled by a valve.
- the edge of the support band 2 is cooled with a width between 200 and 400 mm, since there takes place the largest thermal stress.
- the cooling performance is also enhanced in an outline of the fibrous web 1 in an upstream unit of the paper machine and indeed over the entire width.
- the heating power of the drying hood 8 as well as the temperature of the support belt 2 detected by sensors are likewise taken into account.
Description
Die Erfindung betrifft einen Prallströmtrockner zur Trocknung einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn, gemäß dem Oberbegriff des vorliegenden Anspruchs 1.The invention relates to an impingement dryer for drying a paper, board, tissue or another fibrous web, according to the preamble of
Derartige Prallströmtrockner sind beispielsweise aus der US-A-5588223, US-A-4361466 oder DE 19841768 A1 bekannt, wobei sie Teil der Trockenpartie einer Papiermaschine sind. Die Temperatur der Heißluft bzw. des Heißdampfes kann dabei Werte zwischen 300 ° und 500 °C erreichen. Im Gegensatz dazu liegt die Temperaturbeständigkeit der in Frage kommenden Stützbänder, insbesondere wegen des Kunststoffanteils zwischen 140 und 240 °C.Such impingement dryer are known for example from US-A-5588223, US-A-4361466 or DE 19841768 A1, where they are part of the dryer section of a paper machine. The temperature of the hot air or of the superheated steam can reach values between 300 ° and 500 ° C. In contrast, the temperature resistance of the candidate support bands, in particular because of the plastic content between 140 and 240 ° C.
Da die Faserstoffbahn gegenüber dem Stützband eine ausreichende Wärmeisolierung darstellt, sind im wesentlichen nur die nicht von ihr abgedeckten Bereiche des Stützbandes, d. h. die Ränder thermisch gefährdet.Since the fibrous web relative to the support band is a sufficient thermal insulation, are essentially only the uncovered areas of the support band, d. H. the edges are thermally endangered.
Um dem zu begegnen, wird meist die Breite der Prallströmtrockner auf die Bahnbreite beschränkt, was jedoch Schwierigkeiten oder einen erheblichen Aufwand bei sich ändernder Breite der Faserstoffbahn mit sich bringt.To counter this, usually the width of the impingement dryer is limited to the web width, which, however, brings difficulties or a considerable effort with changing width of the fibrous web with it.
Auch die Verringerung der Temperatur der Strömung zu den Rändern der Faserstoffbahn hin wurde vorgeschlagen. Im Ergebnis beeinträchtigt dies jedoch das Trocknungsergebnis.Also, the reduction of the temperature of the flow towards the edges of the fibrous web has been proposed. As a result, however, this impairs the drying result.
Die Aufgabe der Erfindung ist daher die Schaffung eines einfachen thermischen Schutzes des Stützbandes ohne wesentliche Beeinträchtigung der Trocknung der Faserstoffbahn.The object of the invention is therefore to provide a simple thermal protection of the support band without significantly affecting the drying of the fibrous web.
Erfindungsgemäß wurde die Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst.According to the invention the object has been solved by the features of the characterizing part of
Bei großzügiger Auslegung des gekühlten Bereiches des Stützbandes, das heißt der Kühlung bis in den Randbereich der Faserstoffbahn hinein, ist außerdem kein Nachjustieren bei sich ändernden Bahnbreiten der Faserstoffbahn nötig. Insbesondere dafür ist es von Vorteil, wenn die Kühlung des Stützbandes nach der Abgabe der Faserstoffbahn von diesem an eine folgende Einheit erfolgt.With a generous design of the cooled area of the support band, that is, the cooling into the edge region of the fibrous web into, also no readjustment with changing web widths of the fibrous web is necessary. In particular, it is advantageous if the cooling of the support belt takes place after the delivery of the fibrous web from this to a following unit.
Im allgemeinen wird dabei der Rand des Stützbandes in einem Bereich zwischen 50 und 1000 mm gekühlt. Vor allem wenn der gekühlte Bereich sehr breit ist oder sich sogar über das ganze Stützband erstreckt, ist es oft vorteilhaft, wenn die Kühlung des Stützbandes in quer zur Bahnlaufrichtung abgegrenzten Kühlzonen unterschiedlich stark erfolgt. Dies ermöglicht eine Anpassung der notwendigen Kühlungsintensität beispielsweise an die örtliche Temperatur des Stützbandes. Vorteile ergeben sich dabei auch, wenn die den Kühlzonen zugeordnete Kühlleistung separat steuerbar ist. Dabei erfolgt die Kühlung des Stützbandes durch wenigstens eine Kühleinrichtung in Form von Flüssigkeits- und/oder Druckluftdüsen. Hierzu sollte den Flüssigkeitsdüsen eine Flüssigkeit zugeführt werden, deren Siedetemperatur unter der maximal zulässigen Temperatur des Stützbandes liegt, vorzugsweise Wasser oder Alkohole, beispielsweise Polyethylenglykol. Diese Verdunstungskühlung verhindert bei ausreichender Flüssigkeitszufuhr, dass die Temperatur des Stützbandes über die Siedetemperatur der Flüssigkeit steigt. Um die Umgebung der Maschine zu entlasten sowie eine Wiederbefeuchtung der Faserstoffbahn zu verhindern sollte die vom Stützband abgeprallte Flüssigkeit und/oder davon ausgehender Flüssigkeitsnebel von Leitelementen und/oder Auffangvorrichtungen und/oder Absaugeinrichtungen abgeführt werden.In general, while the edge of the support band is cooled in a range between 50 and 1000 mm. Especially when the cooled area is very wide or even extends over the entire support band, it is often advantageous if the cooling of the support belt takes place in different degrees in cooling zones delimited transversely to the web running direction. This allows adaptation of the necessary cooling intensity, for example, to the local temperature of the support band. Advantages also arise when the cooling zones associated cooling capacity is controlled separately. The cooling of the support belt is effected by at least one cooling device in the form of liquid and / or compressed air nozzles. For this purpose, the liquid nozzles should be supplied with a liquid whose boiling point is below the maximum allowable temperature of the support band, preferably water or alcohols, for example polyethylene glycol. This evaporative cooling prevents sufficient liquid supply that the temperature of the support belt rises above the boiling temperature of the liquid. In order to relieve the environment of the machine and to prevent rewetting of the fibrous web, the liquid bounced off the support belt and / or liquid mist emanating therefrom should be removed from guide elements and / or catching devices and / or suction devices.
Zur Einflußnahme auf die Kühlleistung sollte der Druck und/oder der Durchsatz der Flüssigkeits- und/oder Druckluftdüsen vorzugsweise einzeln oder zonenweise steuerbar sein. Dies ermöglicht es, die Kühlleistung in Abhängigkeit von der Heizleistung des Prallströmtrockners einzustellen, vorzugsweise zu steuern und/oder in Abhängigkeit von der Temperatur des Stützbandes, insbesondere der Temperatur der betreffenden Kühlzone zu regeln und/oder in Abhängigkeit von einer vorgelagerten Abrißerkennung der Faserstoffbahn zu steuern. Hierzu sind Temperatur-Sensoren zur Messung der Temperatur des Stützbandes in Bahnlaufrichtung vor und unter Umständen aber auch nach der Kühleinrichtung hilfreich, wobei diese insbesondere gegenüber dem Rand des Stützbandes angeordnet werden sollten. Zu Vergleichszwecken ist auch die Messung der Temperatur des Stützbandes im mittleren Breich von Vorteil.In order to influence the cooling capacity, the pressure and / or the throughput of the liquid and / or compressed-air nozzles should preferably be controllable individually or in zones. This makes it possible to adjust the cooling capacity as a function of the heating power of the impingement dryer, preferably to control and / or depending on the temperature of the support belt, in particular the temperature of the respective cooling zone to regulate and / or in dependence on an upstream demolition detection of the fibrous web , For this purpose, temperature sensors for measuring the temperature of the support belt in the web running direction before and under circumstances but also after the cooling device helpful, which should be arranged in particular with respect to the edge of the support band. For comparison purposes, it is also advantageous to measure the temperature of the support band in the middle region.
Im allgemeinen sollte das Stützband als Sieb ausgeführt sein. Außerdem ist es zur Gewährleistung eines stabilen Laufs des Stützbandes und damit auch der Faserstoffbahn sowie hinsichtlich des Abstandes zum Prallströmtrockner vorteilhaft, wenn das Stützband während der Beaufschlagung der Faserstoffbahn mit der Heißluft-und/oder Heißdampfprallströmung über eine rotierende Stützwalze geführt wird. Eine konstruktiv einfache Lösung ergibt sich dabei, wenn die Heißluft- und/oder Heißdampfprallströmung von einer in einem Umfangsbereich der Stützwalze angeordneten Trockenhaube erzeugt wird.In general, the support band should be designed as a sieve. In addition, it is to ensure a stable running of the support belt and thus the fibrous web and in terms of the distance to the impingement dryer advantageous when the support belt is guided during the application of the fibrous web with the hot air and / or superheated steam flow over a rotating support roller. A structurally simple solution results when the hot air and / or hot steam impact flow is generated by a drying hood arranged in a peripheral region of the support roller.
Die erfindungsgemäße Kühlung des Stützbandes ist auch bei Heißluft-Schwebetrocknern einsetzbar.The cooling of the support band according to the invention can also be used in hot air suspended dryers.
Die Kühlung der Stützbandes kann außerhalb des die Faserstoffbahn führenden Bereiches bei Bedarf an mehreren Stellen entlang des Laufs des Stützbandes erfolgen.The cooling of the support band can take place outside the area leading the fibrous web, if necessary, at several points along the run of the support band.
Nachfolgend soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. In der beigefügten Zeichnung zeigt
- Figur 1: einen schematischen Querschnitt durch eine Trocknungsanordnung mit Trockenhaube und Kühleinrichtung und
- Figur 2: ein Teilschnitt A-A gemäß
Figur 1.
- Figure 1: a schematic cross section through a drying arrangement with drying hood and cooling device and
- FIG. 2: a partial section AA according to FIG. 1.
Der Prallströmtrockner ist Teil einer Papiermaschine zur Trocknung der Faserstoffbahn 1 und wird im wesentlichen von einer rotierenden Stützwalze 7 und einer Trockenhaube 8 gebildet. Die Trockenhaube 8 ist im Abstand von wenigen Zentimetern zur Stützwalze 7 angeordnet und erstreckt sich über einen wesentlichen Teil des Umfangs der Stützwalze 7.The impingement dryer is part of a paper machine for drying the
Die Stützwalze 7 wird von einem endlos umlaufenden Stützband 2 in Form eines Trockensiebes sowie der außen liegenden Faserstoffbahn 1 umschlungen. Von der im Umschlingungsbereich angeordneten Trockenhaube 8 erfolgt die Beaufschlagung der Faserstoffbahn 1 mit Heißluft, was zur Trocknung der Faserstoffbahn 1 führt. Hierzu sind in der Trockenhaube 8 mehrere zur Faserstoffbahn 1 gerichtete Düsen vorhanden. Das Stützband 2 ist zwangsläufig breiter als die Faserstoffbahn 1. Dies führt insbesondere bei sich ändernder Breite der Faserstoffbahn 1 dazu, daß eine Randzone des Stützbandes 2 direkt, d. h. ohne dazwischenliegenden Faserstoffbahn 1 der Heißluft ausgesetzt ist, was wegen des Kunststoffanteils im Stützband 2 zu thermischen Schädigungen desselben führen kann.The
Nach der Trockenhaube 8 leitet das Stützband 2 die Faserstoffbahn 1 von der Stützwalze 7 zu einer, von einem luftdurchlässigen Sieb 10 umschlungenen und besaugten Leitwalze 9. Die Leitwalze 9 unterstützt durch den Unterdruck die Übergabe der Faserstoffbahn 1 an das Sieb 10.After the
Nach der Abgabe der Faserstoffbahn 1 wird das Stützband 2 über seine gesamte Breite von einer Kühleinrichtung in Form von Wasserdüsen 4 gekühlt. Dabei wird die, der Heißluft direkt ausgesetzte Randzone des Stützbandes 2 besonders stark gekühlt.After delivery of the
Die Wasserdüsen 4 befinden sich in einer zum Stützband 2 hin offenen Haube und sind in mehreren quer zur Bahnlaufrichtung 3 verlaufenden, hintereinander liegenden Reihen angeordnet.The
Die Kühlung des Stützbandes 2 erfolgt in quer zur Bahnlaufrichtung 3 abgegrenzten Kühlzonen unterschiedlich stark. Um die den Kühlzonen zugeordnete Kühlleistung separat steuern zu können, sind die Wasserdüsen 4 der betreffenden Kühlzone mit einer gemeinsamen und über ein Ventil steuerbaren Druckleitung 11 verbunden.The cooling of the
Am stärksten wird der Rand des Stützbandes 2 mit einer Breite zwischen 200 und 400 mm gekühlt, da dort die größte thermische Beanspruchung stattfindet.Most strongly, the edge of the
Die Kühlleistung wird aber auch bei einem Abriß der Faserstoffbahn 1 in einer vorgelagerten Einheit der Papiermaschine verstärkt und zwar über die gesamte Breite. Bei der Steuerung der Kühlleistung wird ebenfalls die Heizleistung der Trockenhaube 8 sowie die von Sensoren erfasste Temperatur des Stützbandes 2 berücksichtigt.However, the cooling performance is also enhanced in an outline of the
Um die Belastung der Umgebung mit in dem, beim Kühlen entstehenden Wassernebel zu verringern, befindet sich auf der, den Wasserdüsen 4 gegenüberliegenden Seite des Stützbandes 2 eine mit einer Vakuumquelle verbundene Absaugeinrichtung 6. Des weiteren sind im Bereich der Wasserdüsen 4, das heißt der sie umgebenden Haube Auffangvorrichtungen 5 für das vom Stützband 2 abtropfende Wasser vorhanden, welche ebenfalls eine Absaugung besitzen können.In order to reduce the burden of the environment with in the water mist formed during cooling, located on the, opposite the
Claims (15)
- Impingement dryer for drying a paper, board, tissue or another fibrous web (1), in which the fibrous web (1) has a hot air and/or hot steam impingement flow applied to it on one side and is supported with the opposite side on an air-permeable, endlessly circulating supporting belt (2), at least the edge zone of the supporting belt (2) to which the hot air and/or hot steam impingement flow is applied directly being cooled, characterized in that the cooling power is controlled or regulated, specifically regulated as a function of the heating power of the impingement dryer and/or of the temperature of the supporting belt (2), in particular the temperature of the relevant cooling zone, and/or is controlled as a function of upstream break detection of the fibrous web (1).
- Impingement dryer according to Claim 1, characterized in that the cooling of the supporting belt (2) is carried out in accordance with the output of the fibrous web (1) from the latter to a following unit.
- Impingement dryer according to Claim 1 or 2, characterized in that at least the edge of the supporting belt (2) which is not covered by the fibrous web (1) is cooled.
- Impingement dryer according to one of the preceding claims, characterized in that the edge of the supporting belt (2) is cooled in a width region between 50 and 1000 mm.
- Impingement dryer according to one of the preceding claims, characterized in that the supporting belt (2) is cooled over the entire width.
- Impingement dryer according to one of the preceding claims, characterized in that the cooling of the supporting belt (2) is carried out to different extents in cooling zones delimited transversely with respect to the web running direction (3).
- Impingement dryer according to Claim 6, characterized in that the cooling power assigned to the cooling zones can be controlled separately.
- Impingement dryer according to one of the preceding claims, characterized in that the cooling of the supporting belt (2) is carried out by means of at least one cooling device in the form of liquid nozzles and/or compressed air nozzles (4).
- Impingement dryer according to Claim 8, characterized in that the liquid nozzles (4) are supplied with a liquid whose boiling point lies below the maximum permissible temperature of the supporting belt (2), preferably water or alcohols, for example polyethylene glycol.
- Impingement dryer according to Claim 8 or 9, characterized in that the liquid reflected by the supporting belt (2) and/or liquid mist originating therefrom is led away by guide elements and/or collecting devices (5) and/or extraction devices (6) .
- Impingement dryer according to one of Claims 8 to 10, characterized in that the pressure and/or the throughput of the liquid and/or compressed air nozzles can preferably be controlled separately, individually or zone by zone.
- Impingement dryer according to one of the preceding claims, characterized in that the supporting belt (2) is formed as a fabric.
- Impingement dryer according to one of the preceding claims, characterized in that, during the application of the hot air and/or hot steam impingement flow to the fibrous web (1), the supporting belt (2) is led over a rotating supporting roll (7).
- Impingement dryer according to Claim 13, characterized in that the hot air and/or hot steam impingement flow originates from a drying hood (8) arranged in a circumferential region of the supporting roll (7).
- Impingement dryer according to one of the preceding claims, characterized in that the cooling of the supporting belt (2) outside the region carrying the fibrous web (1) is carried out at a plurality of points along the course of the supporting belt (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10109525A DE10109525A1 (en) | 2001-02-28 | 2001-02-28 | Impingement dryer |
| DE10109525 | 2001-02-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1236829A2 EP1236829A2 (en) | 2002-09-04 |
| EP1236829A3 EP1236829A3 (en) | 2004-01-14 |
| EP1236829B1 true EP1236829B1 (en) | 2006-09-27 |
Family
ID=7675730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01125932A Expired - Lifetime EP1236829B1 (en) | 2001-02-28 | 2001-10-31 | Impingement dryer |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20020116838A1 (en) |
| EP (1) | EP1236829B1 (en) |
| DE (2) | DE10109525A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016125172A1 (en) * | 2016-12-21 | 2018-06-21 | Voith Patent Gmbh | Method for operating a heating group subsystem and heating subsystem |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4361466A (en) * | 1977-10-27 | 1982-11-30 | Beloit Corporation | Air impingement web drying method and apparatus |
| US5588223A (en) * | 1994-06-14 | 1996-12-31 | Asea Brown Boveri Inc. | Restrained paper dryer |
| FI102624B1 (en) * | 1994-06-23 | 1999-01-15 | Valmet Corp | Method and apparatus for drying or cooling a paper web or the like |
| WO2000008252A2 (en) * | 1998-08-04 | 2000-02-17 | Valmet Corporation | Method and arrangement for handling paper or cardboard webs |
| DE19841768A1 (en) * | 1998-09-11 | 2000-03-16 | Voith Sulzer Papiertech Patent | Dryer section |
| FI106269B (en) * | 1999-05-10 | 2000-12-29 | Valmet Corp | Blow arrangement and method for compensating the curl tendency of paper or cardboard webs and a paper or cardboard machine |
-
2001
- 2001-02-28 DE DE10109525A patent/DE10109525A1/en not_active Withdrawn
- 2001-10-31 EP EP01125932A patent/EP1236829B1/en not_active Expired - Lifetime
- 2001-10-31 DE DE50111090T patent/DE50111090D1/en not_active Expired - Lifetime
-
2002
- 2002-01-31 US US10/059,333 patent/US20020116838A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE50111090D1 (en) | 2006-11-09 |
| EP1236829A2 (en) | 2002-09-04 |
| US20020116838A1 (en) | 2002-08-29 |
| EP1236829A3 (en) | 2004-01-14 |
| DE10109525A1 (en) | 2002-09-05 |
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