EP0745157B1 - Vorrichtung zum aufbringen von dampf - Google Patents
Vorrichtung zum aufbringen von dampf Download PDFInfo
- Publication number
- EP0745157B1 EP0745157B1 EP95905552A EP95905552A EP0745157B1 EP 0745157 B1 EP0745157 B1 EP 0745157B1 EP 95905552 A EP95905552 A EP 95905552A EP 95905552 A EP95905552 A EP 95905552A EP 0745157 B1 EP0745157 B1 EP 0745157B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- blower box
- web
- steam blower
- press roll
- 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
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/008—Steam showers
Definitions
- the invention relates to a device for applying Steam on a running material web, e.g. towards one draining and through the press section one Papermaking machine running paper web, according to the preamble of claim 1 such a device belongs primarily Steam box.
- a device for applying Steam on a running material web e.g. towards one draining and through the press section one Papermaking machine running paper web, according to the preamble of claim 1
- such a device belongs primarily Steam box.
- DE 41 25 062 A1 is referred.
- Such a steam box is mainly used in the Papermaking used. It is used with the help of the material vapor applied the temperature of the Material web to increase the drainage performance of the To increase the press section.
- the steam blower box offers the possibility of different sections Steam application to the moisture cross profile of the material web influence.
- sectional Chambers exiting steam through valves regulated, which are arranged within the steam blow box.
- Each correction zone is with a separate, in general pneumatically controlled valve.
- the zone chambers can be any according to the invention be dimensioned small because of the control valves basically outside the steam box, namely are arranged to the side of the machine.
- each Zone chamber by means of its own (“sectional") Connect the steam line to one of the control valves.
- sectional steam line therefore includes a steam box attached part (with an outside of the steam box inflowing end) and a moving part that on the one hand (directly or indirectly) with the person concerned Control valve is connected and the other to the said Incoming end can be coupled by means of a line connection.
- the clear distance between neighboring inflow ends is much larger than that within the Steam clearing box provided clear distance between neighboring sectional steam lines.
- the steam is transferred from one main steam line to one Steam distributor led out of the paper machine is arranged, preferably next to the paper machine, e.g. on the drive side or e.g. in the basement, at least on one Easily accessible place during machine operation.
- the individual control elements are on this steam distributor (Control valves) arranged. Every single zone chamber of the Steam box is over a separate sectional Steam line connected to the corresponding control valve.
- the parts of the sectional attached to the steam box Steam lines end (against the flow direction) outside of steam blowing on a plate, e.g. Carrier plate which is rigidly connected to the steam box.
- Flexible lines between the carrier plate and the Control valves serve to absorb the swiveling movement and to compensate for any thermal longitudinal expansion of the steam box.
- the valve actuators are controlled electric motor.
- the steam blow box 48 consists of a self-supporting Stainless steel construction; it stretches on the coat of a Paper web P leading roller across the web running direction the paper machine, from the driver's side FS to the drive side TS (Fig. 8). In Fig. 1 only the drive end of the Steam box shown. In the lower support frame 1, 1 ' webs 43 are welded in, the bores 10 and 11 exhibit. The lower support frame 1, 1 'and an upper one Support frame 2 are with each other via side walls 8 and 9 connected. Because of this design optimal lateral stability is achieved. The support frame 1, 1 'and 2 and the side walls 8 and 9 delimit a middle one Chamber 15. A tube bundle extends through this, consisting of a variety of steam lines 4, of which each opens into a zone chamber 3, thereby the to pass passing paper web P with "steam I".
- a steam channel 13 opens into the lower chamber 12.
- the preheating steam flowing in here passes through (“steam II") the holes 10 and 14 in the chamber 15, which is the tube bundle includes.
- This steam II passes through the holes 16 finally in the chamber 33 of the support frame 2.
- the inflowing steam II first through the chamber 12 from the drive side to the driver side guided and passes through holes in the connection zone 45 into chamber 15 (Figs. 7 and 8).
- This steam II whose Temperature is higher than the steam I within the sectional steam lines 4, ensures that even at closed valves no cooling of the sectional Steam lines 4 and the individual zone chambers 3 takes place. This means that achieved that in the steam lines and in little or no condensate forms in the zone chambers. It there is also a strict separation between steam I and Steam II ensured.
- the individual zone chambers 3 are on the lower support frame 1, 1 'arranged. They are over the side panels 19 and 17 fixed. A separate one opens into the zone chambers Steam pipe 4.
- Each zone chamber contains one Perforated sheet insert 20 with perforated sheets 34, the free Cross-sectional area increases towards the steam outlet. This Perforated plates 34 cause the steam I within the individual zones are evenly across the zone width distributed.
- the individual perforated sheet inserts 20 can Be removed for maintenance purposes (Fig. 3).
- the individual zone chambers 3 are separated by a (according to FIG. 1) common steam outlet plate 22 limited. This is with screwed the sheet metal parts 19 and 1, or over Guide rails 44 fixed so that it is for cleaning purposes is easily dismantled. It has several in the longitudinal direction rows of blowing openings 32 arranged one behind the other. The direction of the steam outlet can be perpendicular to Paper direction or inclined according to FIG. 2, so that the Steam I flows against the incoming train. Everywhere, where condensation of steam could occur Drain openings 11, 18 provided with the associated Drainage channels 24, 25, 26, 27.
- the drive end of the steam box 48 is at rest Fig. 1 by means of a carrier plate 28 which is an extension e.g. of the lower support frame 1, 1 '(Fig. 2) can be slidable on a frame 51.
- the steam lines 4 are against the steam flow direction on the drive side Extended at the end of the steam box; their inflow ends are fixed, for example, with the support plate 28 connected.
- a regulating body designated overall by R is arranged and embraced laterally outside the paper machine for each zone chamber 3 a control valve 35 with a drive Stepper motor M.
- the connection from the control valves 35 to Carrier plate 28 take lines 29, at least are partially designed as flexible lines.
- the Outflow ends 29 'of a number of flexible lines are on a so-called supply plate 30 attached.
- This Supply plate is with quick release 31 with Carrier plate 28 connected. About these quick release elements if the steam box is removed, a quick one Uncoupling possible (see Fig. 4 and 5).
- the control valves 35 are designed so that several side by side on one Steam distribution channel 36 can be summarized. Each Steam distribution channel 36 is steam from a main steam line H fed.
- a known method can be used to ensure that the amount of steam emerging from the valve is almost is independent of the downstream resistors, i.e. despite different steam line lengths of the individual Zones ensures that the valve position remains the same approximately the same amount of steam escapes from each zone.
- the width of the individual zone chamber can be be reduced to a dimension that is only slightly larger than the outside diameter the individual steam line 4 is.
- FIG. 6 schematically shows a press section in which a pre-press nip is formed between two press rolls 45 and 46 through which the paper web to be dewatered together with 2 Felt runs through.
- the lower one runs behind the pre-press nip Felt to a felt guide roller 49 while the paper web together with the upper felt on the press roller 46 (mostly a suction press roll) runs up into a press nip that is formed between the rollers 46 and 47.
- the press roll 47 is feltless, i.e. this comes in direct with the paper web Contact. For the constant cleaning of this roller are therefore a or two scrapers 50 are provided.
Landscapes
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Description
- Fig. 1
- Gesamtansicht;
- Fig. 2
- Querschnitt durch einen Dampfblaskasten;
- Fig. 3
- Zonenkammer mit Lochblecheinsatz;
- Fig. 4/5
- Verbindung der flexiblen Leitungen mit den Leitungen des Dampfblaskastens, Fig. 4: gelöst, Fig. 5: geschlossen
- Fig. 6
- Einbau-Beispiel in einer Pressenpartie;
- Fig. 7/8
- von Fig. 2 und 3 abweichendes Ausführungsbeispiel.
Claims (10)
- Vorrichtung zum Aufbringen von Dampf auf eine laufende Materialbahn (P), z.B. auf eine zu entwässernde und durch die Pressenpartie einer Papierherstellungsmaschine laufende Papierbahn, mit den folgenden Merkmalen:a) ein langgestreckter Dampfblaskasten (48) erstreckt sich quer zur Bahnlaufrichtung über die gesamte Bahnbreite;b) der Dampfblaskasten (48) hat eine Vielzahl von über die Bahnbreite aneinandergereihten Zonenkammern (3);c) jede Zonenkammer (3) ist über eine ihr eigene sektionale Dampfleitung (4,29) mit einem darin vorgesehenen Regelventil (35) an eine Dampfquelle (H) angeschlossen;d) der Dampfblaskasten (48) ist derart verschiebbar gelagert, daß der Abstand zwischen dem Dampfblaskasten und dem Bahnlaufweg einstellbar ist;e) jedes der Regelventile (35) ist seitlich in einem Abstand vom Dampfblaskasten, z.B. seitlich außerhalb der Papiermaschine, angeordnet und mittels eines beweglichen Teils (29) der sektionalen Dampfleitung mit dem Einströmende (4') eines am Dampfblaskasten befestigten Teils (4) der sektionalen Dampfleitung verbunden;f) die innerhalb des Dampfblaskastens (48) befindlichen Bereiche der sektionalen Dampfleitungen (4) sind derart angeordnet, daß der lichte Abstand (a) zwischen benachbarten Leitungen (4), gesehen im Querschnitt durch den Dampfblaskasten, nur ein Bruchteil des lichten Abstandes (b) ist, der zwischen benachbarten und außerhalb des Dampfblaskastens befindlichen Einströmenden (4') vorgesehen ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zum Vorwärmen bzw. Aufheizen des Dampfblaskastens (48) Dampf unabhängig von dem die Materialbahn (P) beaufschlagenden Dampf, dem Dampfblaskasten zuführbar ist.
- Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß an wenigstens einem der beiden Enden des Dampfblaskastens (48) eine Trägerplatte (28) vorgesehen ist, die sich in den Bereich außerhalb der Längserstreckung des Dampfblaskastens, z.B. in den Bereich seitlich außerhalb der Papiermaschine, erstreckt, und daß jedes der Einströmenden (4') des am Dampfblaskasten befestigten Teils (4) der sektionalen Dampfleitung an der Trägerplatte (28) befestigt ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß wenigstens eine Gruppe von flexiblen Leitungen (29) mittels einer Versorgungsplatte (30) an die Trägerplatte (28) koppelbar ist.
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß jedes der Regelventile (35) mittels eines Schrittmotors (M) steuerbar ist.
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Breite (B) der einzelnen Zonenkammer (3) ungefähr gleich dem Durchmesser (D) der in sie mündenden Dampfleitung (4) ist.
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß im oberen Bereich des Dampfblaskasten-Querschnittes ein Hohlraum (33) vorgesehen ist, in den quer zur Bahnlaufrichtung ein Träger einführbar ist, zum Zwecke des Ausbaus des Dampfblaskastens aus der Papiermaschine.
- Anwendung einer Vorrichtung nach einem der vorangehenden Ansprüche in einer wenigstens drei Preßwalzen (45-47) umfassenden Pressenpartie, wobei diese folgende Merkmale aufweist:a) die Papierbahn läuft mit einem Filz über die mittlere Preßwalze, z.B. eine Saugpreßwalze (46), in einen Preßspalt, gebildet durch die mittlere Preßwalze und eine filzlose Preßwalze (47);b) der Dampfblaskasten (48) bedampft die Papierbahn beim Lauf über die mittlere Preßwalze (46) und ist relativ zu dieser verschiebbar, so daß der Abstand zur mittleren Preßwalze einstellbar ist;c) an einem von der Bahn freien Umfangsteil der filzlosen Preßwalze ist ein Schaber (50) vorgesehen.
- Anwendung einer Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß an der filzlosen Preßwalze (47) hintereinander zwei Schaber (50) vorgesehen sind.
- Anwendung einer Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Papierbahn vor dem genannten Preßspalt zusammen mit dem Filz und einem zweiten Filz durch einen Vorpreßspalt läuft, und daß der zweite Filz vom Vorpreßspalt zu einer Leitwalze (49) läuft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT95905552T ATE174394T1 (de) | 1995-01-19 | 1995-01-19 | Vorrichtung zum aufbringen von dampf |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9507115A BR9507115A (pt) | 1995-01-19 | 1995-01-19 | Dispositivo para a aplicação de vapor |
PCT/DE1995/000060 WO1996022420A1 (de) | 1995-01-19 | 1995-01-19 | Vorrichtung zum aufbringen von dampf |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0745157A1 EP0745157A1 (de) | 1996-12-04 |
EP0745157B1 true EP0745157B1 (de) | 1998-12-09 |
Family
ID=25664715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95905552A Expired - Lifetime EP0745157B1 (de) | 1995-01-19 | 1995-01-19 | Vorrichtung zum aufbringen von dampf |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0745157B1 (de) |
BR (1) | BR9507115A (de) |
WO (1) | WO1996022420A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29809466U1 (de) | 1998-05-26 | 1998-08-06 | Voith Sulzer Papiertech Patent | Dampfblaskasten |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2751245A1 (de) * | 1977-11-16 | 1979-06-21 | Valmet Oy | Verfahren und vorrichtung zur verbesserung der entwaesserung im pressenteil einer papiermaschine |
US4398355A (en) * | 1981-02-25 | 1983-08-16 | Dove Norman F | Steam distribution apparatus |
-
1995
- 1995-01-19 EP EP95905552A patent/EP0745157B1/de not_active Expired - Lifetime
- 1995-01-19 WO PCT/DE1995/000060 patent/WO1996022420A1/de active IP Right Grant
- 1995-01-19 BR BR9507115A patent/BR9507115A/pt not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP0745157A1 (de) | 1996-12-04 |
BR9507115A (pt) | 1997-09-02 |
WO1996022420A1 (de) | 1996-07-25 |
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