EP0950760A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0950760A1
EP0950760A1 EP98105915A EP98105915A EP0950760A1 EP 0950760 A1 EP0950760 A1 EP 0950760A1 EP 98105915 A EP98105915 A EP 98105915A EP 98105915 A EP98105915 A EP 98105915A EP 0950760 A1 EP0950760 A1 EP 0950760A1
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EP
European Patent Office
Prior art keywords
valve
heat exchanger
valve body
channel
feed
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.)
Granted
Application number
EP98105915A
Other languages
German (de)
French (fr)
Other versions
EP0950760B1 (en
Inventor
Berthold Krämer
Ludwig Hellenthal
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.)
Walzen Irle GmbH
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Walzen Irle GmbH
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Application filed by Walzen Irle GmbH filed Critical Walzen Irle GmbH
Priority to AT98105915T priority Critical patent/ATE219539T1/en
Priority to DE59804503T priority patent/DE59804503D1/en
Priority to EP98105915A priority patent/EP0950760B1/en
Publication of EP0950760A1 publication Critical patent/EP0950760A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00—Elements specially adapted for movement
    • F28F5/02—Rotary drums or rollers
    • 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
    • D21F5/022—Heating the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0253—Heating or cooling the rolls; Regulating the temperature
    • D21G1/0266—Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid
    • 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

Definitions

  • the invention relates to a heat exchanger, in particular one heatable roller for the pressing, drying or smoothing unit Machine for paper production or treatment of other material webs, which is optionally tempered with steam or a heating fluid is, as well as with valves for controlling the paths of the heating media in the Heat exchanger.
  • Liquids such as water or petrographic were often used as the heating medium Oils used; according to DE 195 11 086 A1 vapors also prove to be advantageous heating media.
  • Another one Heating steam can pass through peripheral holes in the roll shell are, at the ends of which siphon devices are arranged, by which forms the condensate or condensate-steam mixture is withdrawn from the holes and thus from the rollers.
  • the present invention is based on the object of a heat exchanger or to create a heated roller, the or the optional are heated with steam or a heating liquid, whereby by suitable structure for both types of heating, a high one Efficiency should be achievable with a simple structure and structure to be used differently by creating one or other heating medium.
  • a calender roll is interrupted in the middle as a heat exchanger in FIG 1 shown, which consists of a roll shell 2, the is connected to flange spigot 3 or 4 on both sides.
  • the roll shell 2 For heating is the roll shell 2 relatively close below its outer surface with peripheral holes 5 equipped, and for draining condensate some more peripheral bores 6 are provided closer to the axis.
  • the heating steam becomes a concentric supply line 7 of the flange pin 3, which is simultaneously the derivative 8 encloses.
  • the feed line 7 leads to the valve 9 and passes it Breakthrough 10, and reached from the annular space 11 behind it Feed holes 12, the peripheral holes to be heated 5. From the steam reaches this via a connecting line 13 Storage space 14 of the valve 9 and builds one behind the valve body 15 Pressure on the light and easy-running valve body 15 after moves to the end position shown on the left, in which he moves the front Shuts off valve chamber 16 and thus the derivative 8.
  • the calender roll 1 has an effective siphon arrangement 17 the condensate generated during steam heating receives and, mixed with slip steam, the valve 9 by means of a Condensate drain 18 feeds into the front valve space 16 leads so that the condensate-slip vapor mixture via the discharge 8 is removable.
  • the calender roll 1 is to be heated by a heating liquid are tempered, this is fed to the roller via the discharge line 8. It reaches the valve 9 and acts on the bottom of the easily movable valve body 15 and urges it out the position shown in the drawing against a stop 19th back.
  • the tempering liquid can now flow through the valve body 15 over into the storage space 14 and via connecting lines 13 in to reach peripheral holes 5 and in contact with their walls To transfer heat.
  • the ends of the peripheral holes 5 connected to each other, so that the tempering Liquid is returned and now through feed bores 12 is able to reach the annular space 11, from which the openings 10 the supply line 7 can be reached via which the temperature control Liquid can now drain or is withdrawn.
  • valve bodies made of plastic have proven themselves. It is also essential that the valve body has a low friction factor and in particular has proven to be corrosion-resistant.
  • the guide of the valve body 15 shown in FIG. 3 has proven to be advantageous.
  • the guide space 20 containing the valve body 15 is slim and widens in the lifting direction of the valve body 15, so that sticking, staples, hooks or any other unintentional fixation of the valve body 15 is completely excluded is.
  • valve body 15 It has been shown to be essential here to create the guide space 20 from a material or to line it with a material whose coefficient of thermal expansion is as similar as possible to that of the valve body 15.
  • the valve body 15 itself has a correspondingly elongated structure in order to achieve reliable guidance and is provided in a hollow pot-like manner with a conical pot base 21.
  • FIG. 4 shows this conical pot bottom 21 and the rearward connected guide shaft 23 formed from webs 22. It has been shown to be advantageous here that the valve body 15 floating in the guide space 20 is self-cleaning. In order to make the valve body 15 work even at the lowest differential pressures, mechanical reset devices, for example springs, are dispensed with.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The heat exchanger, especially for a heated roller, is operated by steam with a feed channel (7) and a channel (8) to extract the condensation. When using a heating fluid, the condensation channel (8) is used for its outflow. The feed and outlet channels lead to a valve (9) so that, under pressure in the feed channel (7), the outflow channel (8) is blocked so that only condensation and/or slip steam is fed through the outlet (18) of the outflow channel (8). On pressure in the outflow channel (8), it opens into a build-up zone (14). The feed channel (7) is linked to the valve (9) through the heating circuit of the heat exchanger, and the outflow channel (8) leads directly to the valve (9). The valve is a non-return valve (9), with a valve body (15) expanding in a slight cone shape into a feed zone in the lifting direction. It has a pot shape, with a conical pot base towards the outflow channel (8). The valve body (15) is of a plastics material with a low specific gravity, and pref. ≤ 7.85 g/cm<3>, and is resistant to corrosion. The feed zone material or its coating has the same thermal coefficient of expansion as the valve body (15). The feed zone has a limit stop (19) to define the stroke movement of the valve body (15). The dimensions of the moving parts of the valve allow their movement through the feed channel (7) for exchange and/or repair.

Description

Die Erfindung betrifft einen Wärmetauscher, insbesondere eine beheizbare Walze für das Press-, Trocken- oder Glättwerk einer Maschine zur Papierherstellung oder Behandlung sonstiger Warenbahnen, der wahlweise mit Dampf oder einer Heizflüssigkeit temperiert wird, sowie mit Ventilen zur Steuerung der Wege der Heizmedien im Wärmetauscher.The invention relates to a heat exchanger, in particular one heatable roller for the pressing, drying or smoothing unit Machine for paper production or treatment of other material webs, which is optionally tempered with steam or a heating fluid is, as well as with valves for controlling the paths of the heating media in the Heat exchanger.

Als Heizmedium wurden vielfach Flüssigkeiten wie Wasser oder petrographische Öle eingesetzt; nach der DE 195 11 086 A1 können sich auch Dämpfe als vorteilhafte Heizmedien erweisen. Auch ein solcher Heizdampf kann durch periphere Bohrungen des Walzenmantels geführt werden, an deren Enden Siphon-Einrichtungen angeordnet sind, durch welche das sich bildende Kondensat bzw. Kondensat-Dampf-Gemisch aus den Bohrungen und damit aus den Walzen abgezogen wird.Liquids such as water or petrographic were often used as the heating medium Oils used; according to DE 195 11 086 A1 vapors also prove to be advantageous heating media. Another one Heating steam can pass through peripheral holes in the roll shell are, at the ends of which siphon devices are arranged, by which forms the condensate or condensate-steam mixture is withdrawn from the holes and thus from the rollers.

Die genannte Vorveröffentlichung geht von der Aufgabe der Verwendung von Dampf als Wärmeübertragungsmedium aus und stellt als Nachteil fest, daß im Falle erforderlich werdender Walzenwechsel oder sonstiger Eingriffe im Umfeld der beheizten Walze untragbar lange Auskühlzeiten aufträten und leitet daraus ihre Aufgabe ab, Abkühlzeiten zu verkürzen und nimmt auch ein Betreiben auf einem Temperaturniveau unter der Dampftemperatur in Kauf.The aforementioned prior publication is based on the abandonment of use from steam as a heat transfer medium and presents as a disadvantage determines that in the event of a roll change or other need Interventions in the area around the heated roller are prohibitively long Cooling times occur and derives their task from them, cooling times to shorten and also takes an operating at a temperature level below the steam temperature in purchase.

Diese bekannten Einrichtungen erweisen sich als relativ aufwendig, wobei jedoch auffällt, daß der Innenaufbau der verwendeten Walzen den beiden unterschiedlichen Heizverfahren nicht optimal angepaßt werden konnte, wenn auch versucht wurde, durch Einbau von Ventilen bestimmte Flußrichtungen zu bevorzugen. These known devices prove to be relatively complex, however, it is noticeable that the internal structure of the rollers used not optimally adapted to the two different heating processes could be, if tried, by installing valves to prefer certain flow directions.

Die vorliegende Erfindung geht von der Aufgabe aus, einen Wärmetauscher bzw. eine beheizbare Walze zu schaffen, der bzw. die wahlweise mit Dampf oder einer Heizflüssigkeit beheizbar sind, wobei durch geeigneten Aufbau für beide Beheizungsarten jeweils ein hoher Wirkungsgrad bei einfachem Aufbau erreichbar sein soll und der unterschiedlich zu nutzende Aufbau vom Anlegen des einen bzw. anderen Heizmediums abhängt.The present invention is based on the object of a heat exchanger or to create a heated roller, the or the optional are heated with steam or a heating liquid, whereby by suitable structure for both types of heating, a high one Efficiency should be achievable with a simple structure and structure to be used differently by creating one or other heating medium.

Gelöst wird diese Aufgabe mit den Merkmalen des Patentanspruches 1. Damit stellt sich mit Anlegen von Heizdampf an eine Zuleitung ein System ein, das den heizenden Dampf peripher unter der Mantelfläche bspw. der Walze geführten Bohrungen direkt zuleitet, während gleichzeitig wirkungsvolle Siphon-Einrichtungen das anfallende Kondensat abführen. Wird dagegen eine beheizende Flüssigkeit zugeführt, so stehen die peripheren Bohrungen direkt zur Verfügung. Die Umschaltung erfolgt durch die Ausbildung des steuernden Ventils spontan, sicher und verlässlich bei geringem Bauaufwand.This object is achieved with the features of the patent claim 1. This means that heating steam is applied to a supply line a system that heats the steam peripherally under the jacket surface For example, the roller guided bores fed directly while at the same time effective siphon devices the resulting Drain the condensate. If, on the other hand, a heating liquid is added, so the peripheral holes are directly available. Switching takes place through the formation of the controlling valve spontaneous, safe and reliable with little construction effort.

Zweckmäßige, vorteilhafte und erfinderische Weiterbildungen des Gegenstandes des Hauptanspruches sind in den Unteransprüchen gekennzeichnet.Practical, advantageous and inventive developments of the Subject of the main claim are characterized in the subclaims.

Erläutert ist die Erfindung anhand der Beschreibung eines Ausführungsbeispieles in Verbindung mit dieses darstellenden Zeichnungen. Es zeigen hierbei

Figur 1
in Längsrichtung unterbrochen eine wahlweise durch Dampf oder ein flüssiges Heizmedium temperierbare Kalanderwalze,
Figur 2
einen Querschnitt durch den Mantel der Kalanderwalze aus Figur 1,
Figur 3
vergrößert einen das Ventil enthaltenden Ausschnitt der Kalanderwalze nach Figur 1,
Figur 4
nochmals vergrößert einen Längsschnitt des Ventilkörpers der Figur 3, und
Figur 5
eine Rückansicht des Ventilkörpers der Fig. 4.
The invention is explained on the basis of the description of an exemplary embodiment in conjunction with the drawings which illustrate the same. It shows here
Figure 1
interrupted in the longitudinal direction is a calender roll which can be tempered by steam or a liquid heating medium,
Figure 2
2 shows a cross section through the jacket of the calender roll from FIG. 1,
Figure 3
enlarges a section of the calender roll according to FIG. 1 containing the valve,
Figure 4
again enlarged a longitudinal section of the valve body of Figure 3, and
Figure 5
4 shows a rear view of the valve body of FIG. 4.

In Figur 1 ist mittig unterbrochen als Wärmetauscher eine Kalanderwalze 1 dargestellt, die aus einem Walzenmantel 2 besteht, der beidseitig mit Flanschzapfen 3 bzw. 4 verbunden ist. Zur Beheizung ist der Walzenmantel 2 relativ dicht unter seiner Mantelfläche mit peripheren Bohrungen 5 ausgestattet, und zur Ableitung von Kondensat sind achsnäher einige weitere periphere Bohrungen 6 vorgesehen.A calender roll is interrupted in the middle as a heat exchanger in FIG 1 shown, which consists of a roll shell 2, the is connected to flange spigot 3 or 4 on both sides. For heating is the roll shell 2 relatively close below its outer surface with peripheral holes 5 equipped, and for draining condensate some more peripheral bores 6 are provided closer to the axis.

Bei Dampfbeheizung wird der Heizdampf einer konzentrischen Zuleitung 7 des Flanschzapfens 3 zugeführt, die gleichzeitig die Ableitung 8 umschließt. Die Zuleitung 7 führt zum Ventil 9 und passiert dessen Durchbruch 10, und erreicht vom dahinterliegenden Ringraum 11 über Speisebohrungen 12 die zu beheizenden peripheren Bohrungen 5. Von diesen aus erreicht der Dampf über eine Verbindungsleitung 13 den Stauraum 14 des Ventils 9 und baut hinter dem Ventilkörper 15 einen Druck auf, der den leichten und leicht gängigen Ventilkörper 15 nach links in die dargestellt Endlage verschiebt, in der er den vorderen Ventilraum 16 und damit die Ableitung 8 absperrt.With steam heating, the heating steam becomes a concentric supply line 7 of the flange pin 3, which is simultaneously the derivative 8 encloses. The feed line 7 leads to the valve 9 and passes it Breakthrough 10, and reached from the annular space 11 behind it Feed holes 12, the peripheral holes to be heated 5. From the steam reaches this via a connecting line 13 Storage space 14 of the valve 9 and builds one behind the valve body 15 Pressure on the light and easy-running valve body 15 after moves to the end position shown on the left, in which he moves the front Shuts off valve chamber 16 and thus the derivative 8.

Die Kalanderwalze 1 ist mit einer wirksamen Siphon-Anordnung 17 ausgestattet, die das bei der Dampfbeheizung entstehende Kondensat aufnimmt und, mit Schlupfdampf vermischt, dem Ventil 9 mittels eines Kondensat-Ablaufes 18 zuführt, der in den vorderen Ventilraum 16 führt, so daß das Kondensat-Schlupfdampf-Gemisch über die Ableitung 8 abziehbar ist.The calender roll 1 has an effective siphon arrangement 17 the condensate generated during steam heating receives and, mixed with slip steam, the valve 9 by means of a Condensate drain 18 feeds into the front valve space 16 leads so that the condensate-slip vapor mixture via the discharge 8 is removable.

Soll andererseits die Kalanderwalze 1 durch eine Heizflüssigkeit temperiert werden, wird diese über die Ableitung 8 der Walze zugeführt. Sie erreicht das Ventil 9 und beaufschlagt den Boden des leicht beweglich geführten Ventilkörpers 15 und drängt diesen aus der in der Zeichnung dargestellten Lage gegen einen Anschlag 19 zurück. Die temperierende Flüssigkeit vermag nun am Ventilkörper 15 vorbei in den Stauraum 14 und über Verbindungsleitungen 13 in periphere Bohrungen 5 zu gelangen und im Kontakt mit deren Wandungen Wärme zu übertragen. In an sich bekannter Weise sind die Enden der peripheren Bohrungen 5 miteinander verbunden, so daß die temperierende Flüssigkeit zurückgeführt wird und nunmehr über Speisebohrungen 12 den Ringraum 11 zu erreichen vermag, aus dem über die Durchbrüche 10 die Zuleitung 7 erreichbar ist, über die die temperierende Flüssigkeit nunmehr abzulaufen vermag bzw. abgezogen wird.On the other hand, the calender roll 1 is to be heated by a heating liquid are tempered, this is fed to the roller via the discharge line 8. It reaches the valve 9 and acts on the bottom of the easily movable valve body 15 and urges it out the position shown in the drawing against a stop 19th back. The tempering liquid can now flow through the valve body 15 over into the storage space 14 and via connecting lines 13 in to reach peripheral holes 5 and in contact with their walls To transfer heat. In a manner known per se, the ends of the peripheral holes 5 connected to each other, so that the tempering Liquid is returned and now through feed bores 12 is able to reach the annular space 11, from which the openings 10 the supply line 7 can be reached via which the temperature control Liquid can now drain or is withdrawn.

Als wesentlich hat es sich gezeigt, ein einfach aufgebautes Ventil zu schaffen, daß schnell, sicher und reibungsarm schon auf geringe Druckunterschiede anspricht. Erreicht wird dieses durch den in Figur 4 im Querschnitt und Figur 5 in der Rückansicht dargestellten Ventilkörper 15, der zweckmäßig aus einem Material relativ geringen spezifischen Gewichtes besteht, das wesentlich unter 7,85 g/cm3 liegt. So haben sich bspw. aus Kunststoff bestehende Ventilkörper bewährt. Wesentlich ist auch, daß der Ventilkörper einen geringen Reibungsfaktor aufweist und insbesondere sich als korrosionsresistent erweist. Als vorteilhaft erweist sich die in Figur 3 dargestellte Führung des Ventilkörpers 15. Der den Ventilkörper 15 enthaltende Führungsraum 20 ist schlank und erweitert sich in Abheberichtung des Ventilkörpers 15, so daß ein Haften, Klammern, Haken oder eine sonstige unbeabsichtigte Fixierung des Ventilkörpers 15 völlig ausgeschlossen ist. Als wesentlich hat sich hierbei gezeigt, den Führungsraum 20 aus einem Werkstoff zu erstellen oder mit einem Werkstoff auszukleiden, dessen Wärmeausdehnungskoeffizient dem des Ventilkörpers 15 möglichst gleicht. Der Ventilkörper 15 selbst ist entsprechend länglich aufgebaut, um eine sichere Führung zu erreichen, und ist topfartig hohl mit einem konischen Topfboden 21 versehen. Figur 4 zeigt diesen konischen Topfboden 21 und den rückwärts angeschlossenen, aus Stegen 22 gebildeten Führungsschaft 23. Als vorteilhaft hat sich hierbei gezeigt, daß der im Führungsraum 20 schwebende Ventilkörper 15 sich als selbstreinigend zeigt. Um ein Arbeiten des Ventilkörpers 15 schon bei geringsten Differenzdrucken zu erreichen, ist auf mechanische Rückstelleinrichtungen, beispielsweise Federn, verzichtet.It has been shown to be essential to create a simply constructed valve that responds quickly, safely and with little friction to even small pressure differences. This is achieved by the valve body 15 shown in cross section in FIG. 4 and in the rear view in FIG. 5, which advantageously consists of a material of relatively low specific weight, which is substantially below 7.85 g / cm 3 . For example, valve bodies made of plastic have proven themselves. It is also essential that the valve body has a low friction factor and in particular has proven to be corrosion-resistant. The guide of the valve body 15 shown in FIG. 3 has proven to be advantageous. The guide space 20 containing the valve body 15 is slim and widens in the lifting direction of the valve body 15, so that sticking, staples, hooks or any other unintentional fixation of the valve body 15 is completely excluded is. It has been shown to be essential here to create the guide space 20 from a material or to line it with a material whose coefficient of thermal expansion is as similar as possible to that of the valve body 15. The valve body 15 itself has a correspondingly elongated structure in order to achieve reliable guidance and is provided in a hollow pot-like manner with a conical pot base 21. FIG. 4 shows this conical pot bottom 21 and the rearward connected guide shaft 23 formed from webs 22. It has been shown to be advantageous here that the valve body 15 floating in the guide space 20 is self-cleaning. In order to make the valve body 15 work even at the lowest differential pressures, mechanical reset devices, for example springs, are dispensed with.

So ist ein Wärmetauscher geschaffen, der jeweils wahlweise mit Dampf oder einer Heizflüssigkeit temperierbar ist, und der den hierbei jeweils auftretenden Gegebenheiten sich durch ein extrem schnelles und empfindliches Ventil jeweils anzupassen vermag. This creates a heat exchanger, each with either steam or a heating liquid can be tempered, and this each occurring situation is characterized by an extremely fast and sensitive valve can adapt to each.

BezugszeichenlisteReference list

11
KalanderwalzeCalender roll
22nd
WalzenmantelRoller shell
3, 43, 4
FlanschzapfenFlange spigot
5, 65, 6
Periphere BohrungenPeripheral drilling
77
ZuleitungSupply
88th
AbleitungDerivative
99
VentilValve
1010th
Durchbruchbreakthrough
1111
RingraumAnnulus
1212th
SpeisebohrungenFeed bores
1313
VerbindungsleitungConnecting line
1414
StauraumStorage space
1515
VentilkörperValve body
1616
Vorderer VentilraumFront valve space
1717th
SiphonanordnungSiphon arrangement
1818th
KondensatablaufCondensate drain
1919th
Anschlagattack
2020th
FührungsraumLeadership room
2121
TopfbodenPot bottom
2222
StegeWalkways
2323
FührungsschaftLeadership

Claims (9)

Wärmetauscher, insbesondere beheizbare Walze für das Press-, Trocken- oder Glättwerk einer Maschine zur Papierherstellung oder Behandlung sonstiger Warenbahnen, der wahlweise mit Dampf oder einer Heizflüssigkeit temperiert wird, sowie mit Ventilen zur Steuerung der Wege der Heizmedien,
dadurch gekennzeichnet,
daß bei Betrieb mit Dampf dieser einer Zuleitung (7) zugeführt wird und das Kondensat einer Ableitung (8) entnommen wird, während bei Betrieb mit Heizflüssigkeit diese der Ableitung (8) zugeführt wird und über die Zuleitung (7) abläuft, und daß die Zu- und Ableitung auf ein Ventil (9) führen, das bei Druckbeaufschlagung der Zuleitung (7) die Ableitung (8) sperrt, so daß nur noch Kondensat und/oder Schlupfdampf über einen Kondensatablauf (18) der Ableitung (8) zugeführt wird, und bei Druckbeaufschlagung der Ableitung (8) diese zu einem Stauraum (14) hin öffnet.Heat exchanger, in particular heatable roller for the pressing, drying or smoothing unit of a machine for paper production or treatment of other material webs, which is optionally tempered with steam or a heating liquid, and with valves for controlling the paths of the heating media,
characterized,
that when operating with steam this is fed to a feed line (7) and the condensate is removed from a discharge line (8), while when operated with heating liquid this is fed to the discharge line (8) and runs via the feed line (7), and that the feed line - Lead and discharge to a valve (9), which blocks the discharge (8) when the supply line (7) is pressurized, so that only condensate and / or slip steam is fed via a condensate drain (18) to the discharge line (8), and when the discharge line (8) is pressurized, it opens to a storage space (14). Wärmetauscher nach Anspruch 1,
dadurch gekennzeichnet,
daß die Zuleitung (7) über den Heizkreislauf des Wärmetauschers mit dem Ventil (9) verbunden ist und die Ableitung (8) direkt auf das Ventil (9) führt. Heat exchanger according to claim 1,
characterized,
that the supply line (7) is connected to the valve (9) via the heating circuit of the heat exchanger and the discharge line (8) leads directly to the valve (9). Wärmetauscher nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß das Ventil (9) als Rückschlagventil ausgebildet ist.Heat exchanger according to claim 1 or 2,
characterized,
that the valve (9) is designed as a check valve. Wärmetauscher nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß der Ventilkörper (15) des Ventils (9) in einem sich in Abhebrichtung derselben leicht konisch erweiterten Führungsraum (20) geführt ist, daß er topfförmig ausgebildet ist und der vorzugsweise konisch zulaufende Topfboden (21) der Ableitung (8) zugewandt ist.Heat exchanger according to one of claims 1 to 3,
characterized,
that the valve body (15) of the valve (9) is guided in a slightly conically widened guide space (20) in the lifting direction, that it is pot-shaped and the preferably tapered pot bottom (21) faces the discharge line (8). Wärmetauscher nach Anspruch 4,
dadurch gekennzeichnet,
daß der Ventilkörper (15) aus einem Material geringen, wesentlich unter 7,85 g/cm3 liegenden spezifischen Gewichtes besteht und korrosionsresistent ist.Heat exchanger according to claim 4,
characterized,
that the valve body (15) consists of a material of low, significantly less than 7.85 g / cm 3 specific weight and is corrosion resistant. Wärmetauscher nach Anspruch 4 oder 5,
dadurch gekennzeichnet,
daß der Ventilkörper (15) aus Kunststoff besteht.Heat exchanger according to claim 4 or 5,
characterized,
that the valve body (15) consists of plastic. Wärmetauscher nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet,
daß der Führungsraum (20) des Ventiles (9) aus einem Werkstoff besteht bzw. mit einem solchen ausgekleidet ist, welcher mit seinem Wärmeausdehnungskoeffizienten dem des Ventilkörpers (15) entspricht bzw. angenähert ist.Heat exchanger according to one of claims 4 to 6,
characterized,
that the guide space (20) of the valve (9) consists of a material or is lined with a material which corresponds to or approximates that of the valve body (15) with its coefficient of thermal expansion. Wärmetauscher nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet,
daß der Führungsraum (20) des Ventiles (9) einen den Ventilkörper (15) in seinem Hub begrenzenden Anschlag (19) aufweist. Heat exchanger according to one of claims 4 to 7,
characterized,
that the guide space (20) of the valve (9) has a stop (19) limiting the valve body (15) in its stroke. Wärmetauscher nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet,
daß die beweglichen Teile des Ventils derartige Abmessungen aufweisen, daß sie durch die Zuleitung (7) zu Austausch- und/oder Reparaturzwecken ein- bzw. ausbaubar sind.Heat exchanger according to one of claims 4 to 7,
characterized,
that the movable parts of the valve have dimensions such that they can be installed or removed through the feed line (7) for exchange and / or repair purposes.
EP98105915A 1998-04-01 1998-04-01 Heat exchanger Revoked EP0950760B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT98105915T ATE219539T1 (en) 1998-04-01 1998-04-01 HEAT EXCHANGER
DE59804503T DE59804503D1 (en) 1998-04-01 1998-04-01 heat exchangers
EP98105915A EP0950760B1 (en) 1998-04-01 1998-04-01 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98105915A EP0950760B1 (en) 1998-04-01 1998-04-01 Heat exchanger

Publications (2)

Publication Number Publication Date
EP0950760A1 true EP0950760A1 (en) 1999-10-20
EP0950760B1 EP0950760B1 (en) 2002-06-19

Family

ID=8231696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105915A Revoked EP0950760B1 (en) 1998-04-01 1998-04-01 Heat exchanger

Country Status (3)

Country Link
EP (1) EP0950760B1 (en)
AT (1) ATE219539T1 (en)
DE (1) DE59804503D1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10239559A1 (en) * 2002-08-28 2004-03-25 SCHWäBISCHE HüTTENWERKE GMBH Paper industry heat treatment drum has inlet zone for heated fluid incorporating fluid guide vanes that impart a rotary motion from the drum to the fluid
DE102010044943A1 (en) * 2010-09-10 2012-03-15 Leonhard Breitenbach Gmbh Calender roller has flow passage between inlet and outlet plenum that is comprised with additional axial parallel bore formed between peripheral bores and central bore of roller portion
CN102400409A (en) * 2011-09-28 2012-04-04 大连明珠机械有限公司 Thermal calender roll for paper machine calender machine
CN102419124A (en) * 2011-12-16 2012-04-18 亿恒节能科技江苏有限公司 Drying cylinder heat exchanger and control method thereof
CN102419126A (en) * 2011-12-16 2012-04-18 亿恒节能科技江苏有限公司 Drying cylinder heat exchanger with combined exhaust function

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511086A1 (en) * 1995-03-25 1996-09-26 Schwaebische Huettenwerke Gmbh Steam heated roll for paper machine press or finishing section
DE19626371A1 (en) * 1996-07-02 1998-01-08 Schwaebische Huettenwerke Gmbh Heated and cooled roll for a paper machine press or glazing section

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511086A1 (en) * 1995-03-25 1996-09-26 Schwaebische Huettenwerke Gmbh Steam heated roll for paper machine press or finishing section
DE19626371A1 (en) * 1996-07-02 1998-01-08 Schwaebische Huettenwerke Gmbh Heated and cooled roll for a paper machine press or glazing section

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10239559A1 (en) * 2002-08-28 2004-03-25 SCHWäBISCHE HüTTENWERKE GMBH Paper industry heat treatment drum has inlet zone for heated fluid incorporating fluid guide vanes that impart a rotary motion from the drum to the fluid
US7097605B2 (en) 2002-08-28 2006-08-29 Shw Casting Technologies Gmbh Roller for the thermomechanical treatment of a web-shaped medium
DE10239559B4 (en) * 2002-08-28 2016-09-29 Shw Casting Technologies Gmbh Roller for the thermomechanical treatment of a sheet-like medium
DE102010044943A1 (en) * 2010-09-10 2012-03-15 Leonhard Breitenbach Gmbh Calender roller has flow passage between inlet and outlet plenum that is comprised with additional axial parallel bore formed between peripheral bores and central bore of roller portion
CN102400409A (en) * 2011-09-28 2012-04-04 大连明珠机械有限公司 Thermal calender roll for paper machine calender machine
CN102419124A (en) * 2011-12-16 2012-04-18 亿恒节能科技江苏有限公司 Drying cylinder heat exchanger and control method thereof
CN102419126A (en) * 2011-12-16 2012-04-18 亿恒节能科技江苏有限公司 Drying cylinder heat exchanger with combined exhaust function

Also Published As

Publication number Publication date
EP0950760B1 (en) 2002-06-19
ATE219539T1 (en) 2002-07-15
DE59804503D1 (en) 2002-07-25

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