EP0787272A1 - Cooling surface cladding - Google Patents

Cooling surface cladding

Info

Publication number
EP0787272A1
EP0787272A1 EP95944757A EP95944757A EP0787272A1 EP 0787272 A1 EP0787272 A1 EP 0787272A1 EP 95944757 A EP95944757 A EP 95944757A EP 95944757 A EP95944757 A EP 95944757A EP 0787272 A1 EP0787272 A1 EP 0787272A1
Authority
EP
European Patent Office
Prior art keywords
wall
funnel
vertical
cooling surface
hopper
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
EP95944757A
Other languages
German (de)
French (fr)
Other versions
EP0787272B1 (en
Inventor
Bernd BRÄNDLE
Paul Gilli
Werner HÖLBLINGER
Emmerich Seidelberger
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.)
Austrian Energy and Environment SGP Waagner Biro GmbH
Original Assignee
Austrian Energy and Environment AG and Co KG
Austrian Energy and Environment SGP Waagner Biro GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Austrian Energy and Environment AG and Co KG, Austrian Energy and Environment SGP Waagner Biro GmbH filed Critical Austrian Energy and Environment AG and Co KG
Publication of EP0787272A1 publication Critical patent/EP0787272A1/en
Application granted granted Critical
Publication of EP0787272B1 publication Critical patent/EP0787272B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F22B37/146—Tube arrangements for ash hoppers and grates and for combustion chambers of the cyclone or similar type out of the flues

Definitions

  • the invention relates to a cooling surface lining for polygonal chambers of steam generators with a funnel-shaped bottom and with firing according to the principle of the circulating fluidized bed, which at least partially consists of fin tube walls stretched out between collectors with tubes that run essentially vertically and that form in the bottom area of a funnel are bent convergingly, is formed.
  • the object of the invention is to incorporate components that are external to the combustion chamber and in some cases small-area components into the cooling system and to provide a fin tube wall connected to the circulation of the steam generator by means of a special design of the components and / or the lining pipes.
  • the invention is characterized in that two opposite fin tube walls in the funnel area - viewed from top to bottom - first form in their entire width a funnel wall inclined with respect to the vertical and then at least one vertical funnel wall with a decreasing width and partly inclined collectors, and that the adjacent pipe wall and its opposite pipe wall in the funnel area - viewed from top to bottom - first form a vertical funnel wall with decreasing width and inclined collectors and then with a constant reduced width form a side wall of the funnel inclined with respect to the vertical.
  • the main advantages of the invention are that, despite the difficult pipe arrangement, more heat exchange surfaces can be accommodated in the given space and that the thermal stresses during start-up and shutdown can be reduced despite faster load changes, because all wall parts are cooled uniformly, which increases the thermal elasticity.
  • the new funnel construction is also advantageously suitable for combustion chamber funnels.
  • the invention is illustrated, for example and schematically, in the attached figures. 1 and 2 show an oblique view of two design variations of a funnel-shaped bottom of a steam generator, which are entirely lined with fin tube heating surfaces.
  • FIG. 1 shows a combustion chamber without and FIG. 2 with a partition wall heated on both sides in section.
  • the fins tube wall 1 is angled across its entire width and forms the funnel wall 1 '.
  • This funnel wall 1 ' is finally angled again in the vertical direction, tapering downwards. This is done by leading the pipes that are no longer used to the outside and, in some cases, integrating them in a collector 2 via inclined connecting pieces.
  • the remaining tube wall 1 ′′ is possibly continued and forms a wall of the channel 9 via which the solids are discharged.
  • the raw wall 3 or 3 ′ adjoining the fin tube wall 1 tapers downwards in the vertical position, the excess tubes being connected via nozzles 5 be introduced into the collector 4.
  • the remaining parts of the tube wall 3 are bent obliquely and form the side wall 3 "of the funnel.
  • This tube wall is then connected to the funnel wall 1 "in a manner known per se.
  • the side wall 3" can be bent back into the vertical in order to form a further wall of the channel 9.
  • adjacent tube walls 1, 3 and 3 ' have a different vertical length extension before their first kink to form the funnel, the tubes no longer required in the subsequent inclined tube wall part 1 ' and 3 "in the inclined collecting chambers 4 and 2 at least for Part initiated.
  • two inner funnel walls 8 are also provided, which are connected in terms of cooling to the funnel wall 1 ′′ in which the shorter tubes of the funnel wall 1 ′′ are introduced into the funnel wall 8 after each 90 ′ curvature and represent the lining.
  • the funnel wall 8 can be transferred into the wall of the channel 9.
  • This measure of special funnel formation also makes it possible to carry out the lining of complicated fin tube wall constructions in a relatively simple manner, such as are present, for example, in fluidized bed combustion plants with a circulating fluidized bed, in particular in the region of the return of the fluidized material to the combustion chamber, and the inner surfaces are completely co-located Line cooling surfaces. If these heating surfaces are heated relatively weakly, they can be at least partially integrated into the downpipe system of the steam generator, the tubes which are connected to the collecting chambers 2 and which are therefore arranged at the lowest being expediently used. It is quite possible that part of the fin tube wall 1 is arranged in the riser pipe system, while another part is arranged in the down pipe system.
  • FIG. 1 differs from FIG. 2 not only by a modified view, but also by the introduction of an intermediate wall 6, so that the space enclosed by the tube walls is divided.
  • the circuitry There are changes in the circuitry.
  • a part of the tubes namely the longer tubes of the intermediate wall, are introduced into the lower part of the funnel, while the shorter tubes open into a collector 4 'on the underside of the funnel wall 1'.
  • the longer pipes are compressed in the intermediate wall 6 and, after spreading, are integrated into the funnel walls 8 in such a way that the individual pipes arranged in the intermediate wall 6 are alternately transferred into one of the two oblique funnel walls 8.
  • the tubes of the funnel wall 8 are laid more easily than in FIG. 1 and the collectors designated as shorter collectors 2 'in FIG. 1 are essentially the same size as the collectors 2 and take up a large part of the tubes of the funnel wall 1 " ⁇ the walls of the adjoining channel 9 can be done similarly as in Fig. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

In a cooling surface cladding for polygonal chambers of steam generators with a hopper-shaped floor and fired on the circulating fluidised bed principle, which consists partially of substantially vertical finned tubes extending in the manner of walls between manifolds and converging curves in the floor region to form a hopper, two opposite finned tube walls (1) in the hopper region, viewed from top to bottom, first form a hopper wall (1') inclined from the vertical over their entire width and then form at least one vertical hopper wall (1') of decreasing width and with partially oblique manifolds (2). In the region of the hopper, viewed from top to bottom, the adjacent tube wall (3) and the tube wall (3') opposite it form first a vertical hopper wall of diminishing width and with oblique manifolds (4) and then an inclined side wall (3') of the hopper of constantly reducing width.

Description

O 96/12140 4 PCI7AT95/00203O 96/12140 4 PCI7AT95 / 00203
KühltlächenauskleidungCooling surface lining
Die Erfindung betrifft eine Kühlflächenauskleidung für mehreckige Kammern von Damp¬ ferzeugern mit trichterförmigem Boden und mit Feuerungen nach dem Prinzip der zirku¬ lierenden Wirbelschicht, die zumindest teilweise aus zwischen Sammlern wandweise aus¬ gespannten Flossenrohrwänden mit im wesentlich vertikal verlaufenden Rohren, die im Bodenbereich zur Bildung eines Trichters konvergierend abgebogen sind, gebildet ist.The invention relates to a cooling surface lining for polygonal chambers of steam generators with a funnel-shaped bottom and with firing according to the principle of the circulating fluidized bed, which at least partially consists of fin tube walls stretched out between collectors with tubes that run essentially vertically and that form in the bottom area of a funnel are bent convergingly, is formed.
Es ist bekannt bei Dampferzeugern mit mehreckigem Brennkammerquerschnitt die Wand¬ flächen mit horizontal angeordneten oder leicht ansteigenden und/oder mit vertikal verlau¬ fenden Flossenrohren großflächig auszukleiden. Obwohl es bekannt ist, bei Durchführun¬ gen, insbesondere im Brennerbereich komplizierte Rohrkonstruktionen vorzusehen, wer¬ den kleinere Flächenteile ausgemauert und so der Verwendung als Kühlfläche entzogen. Trichter werden, wenn überhaupt durch leicht ansteigende Rohrbänder schraubenartig ausgekleidet.It is known for steam generators with a polygonal combustion chamber cross-section to line the wall surfaces with horizontally arranged or slightly rising and / or with vertically extending fin tubes over a large area. Although it is known to provide complicated pipe constructions in the case of bushings, in particular in the burner area, smaller surface parts are bricked up and thus removed from use as a cooling surface. Funnels are lined with screws, if at all, by slightly rising pipe straps.
Aus der US 4 576 120 A und der US 4 537 156 A ist es bekannt zur Bildung eines Brenn¬ kammertrichters Rohrwände abzuwinkein und die unterschiedlichen Rohrlängen durch abgestufte Sammler zu berücksichtigen. Dies hat den Nachteil, daß sehr viele Sammler angeschlossen werden müssen, sodaß diese Konstruktion für kleinere Trichter-also - Nichtbrennkammertrichter nicht verwendet wird. Dazu kommt noch daß die Anwendung unserer Konstruktion auch bei schwach beheizten Rohrwänden möglich ist, während die Anwendung der bekannten Konstruktion bei Nichtstrahlungsheizflächen (außerhalb der Brennkammer) Zirkulationsschwierigkeiten erwarten läßt, was sich durch die teilweise Einbindung in das Fallrohrsystem gemäß unserer Erfindung mit Sicherheit vermeiden läßt. Moderne Feuerungen, wie z. B. die zirkulierende Wirbelschichtverbrennung, verlangen im Hinblick auf die Wirtschaftlichkeit eine größere Rücksichtnahme auf kleine meistens nur schwer zu kühlende Teilflächen und eine spezielle Wandausbildung, insbesondere im Trichter- und/oder Zyklon- bzw. Rückführteil. Da ausgemauerte Wandteiie die Anfahrge- schwindigkeit reduzieren, sollen dieselben möglichst vermieden werden.It is known from US Pat. No. 4,576,120 A and US Pat. No. 4,537,156 A to bend pipe walls to form a combustion chamber funnel and to take the different pipe lengths into account by graduated collectors. This has the disadvantage that a large number of collectors have to be connected, so that this construction is not used for smaller funnels, ie non-combustion chamber funnels. In addition, the use of our construction is also possible with weakly heated pipe walls, while the use of the known construction with non-radiant heating surfaces (outside the combustion chamber) can be expected to cause circulation difficulties, which can be avoided with certainty by the partial integration into the downpipe system according to our invention. Modern furnaces, such as B. the circulating fluidized bed combustion, require greater consideration for small, mostly difficult to cool partial areas in view of economy and a special wall formation, especially in the funnel and / or cyclone or return part. Since bricked-up wall parts reduce the start-up speed, the same should be avoided as far as possible.
Die Erfindung hat es sich zur Aufgabe gestellt, auch brennkammerfremde und zum Teil kleinflächige Bauteile in das Kühlsystem einzubinden und durch eine spezielle Ausbildung der Bauteile und/oder der auskleidenden Rohre eine an der Zirkulation des Dampferzeu¬ gers angeschlossene Flossenrohrwand vorzusehen.The object of the invention is to incorporate components that are external to the combustion chamber and in some cases small-area components into the cooling system and to provide a fin tube wall connected to the circulation of the steam generator by means of a special design of the components and / or the lining pipes.
Die Erfindung ist dadurch gekennzeichnet, daß zwei gegenüberliegende Flossenroh rwände im Trichterbereich - von oben nach unten betrachtet - zuerst in ihrer ganzen Breite eine gegenüber der Vertikalen geneigte Trichterwand und anschließend wenigstens eine verti¬ kale Trichterwand mit sich vermindernder Breite und zum Teil schrägliegenden Sammlern bilden, und daß die angrenzende Rohrwand und ihre gegenüberliegende Rohrwand im Trichterbereich - von oben nach unten betrachtet - zuerst mit sich vermindernder Breite und schrägliegenden Sammlern eine vertikale Trichterwand und anschließend mit kon¬ stanter verminderter Breite eine gegenüber der Vertikalen geneigte Seitenwand des Trichters bilden.The invention is characterized in that two opposite fin tube walls in the funnel area - viewed from top to bottom - first form in their entire width a funnel wall inclined with respect to the vertical and then at least one vertical funnel wall with a decreasing width and partly inclined collectors, and that the adjacent pipe wall and its opposite pipe wall in the funnel area - viewed from top to bottom - first form a vertical funnel wall with decreasing width and inclined collectors and then with a constant reduced width form a side wall of the funnel inclined with respect to the vertical.
Wesentliche Ausgestaltungen der Erfindung sind in den Unteransprüchen 2 - 6 angege¬ ben.Significant embodiments of the invention are given in subclaims 2-6.
Die wesentlichen Vorteile der Erfindung bestehen darin, daß trotz der schwierigen Rohranordnung mehr Wärmetauschflächen im gegebenen Raum untergebracht werden können und daß die Wärmespannungen beim An- und Abfahren trotz schnelleren Last¬ wechsel verkleinert werden, weil alle Wandteile gleichmäßig gekühlt sind, wodurch die Wärmeelastizität steigt. Die neue Trichterkonstruktion ist in vorteilhafter Weise auch für Brennkammertrichter geeignet. Die Erfindung ist in den angeschlossenen Figuren beispielsweise und schematisch dar¬ gestellt. Fig. 1 und 2 zeigen im Schrägriß zwei Ausführungsvariationen eines trichterför¬ migen Boden eines Dampferzeugers, die zur Gänze mit Flossenrohrheizflächen ausgeklei¬ det sind.The main advantages of the invention are that, despite the difficult pipe arrangement, more heat exchange surfaces can be accommodated in the given space and that the thermal stresses during start-up and shutdown can be reduced despite faster load changes, because all wall parts are cooled uniformly, which increases the thermal elasticity. The new funnel construction is also advantageously suitable for combustion chamber funnels. The invention is illustrated, for example and schematically, in the attached figures. 1 and 2 show an oblique view of two design variations of a funnel-shaped bottom of a steam generator, which are entirely lined with fin tube heating surfaces.
Fig.1 zeigt eine Brennkammer ohne und Fig. 2 mit beidseitig beheizter Zwischenwand im Schnitt.1 shows a combustion chamber without and FIG. 2 with a partition wall heated on both sides in section.
In Fig. 1 ist ein trichterförmiger Brennkammerboden dargestellt, welcher durch eine Zwi¬ schenwand in zwei Auslässe unterteilt ist. Die Flossen rohrwand 1 wird in ihrer ganzen Breite schräg abgewinkelt und bildet die Trichterwand 1 '. Diese Trichterwand 1' wird schließlich noch einmal in Richtung der Vertikalen abgewinkelt, wobei sie sich nach unten verjüngt. Dies geschieht dadurch, daß die nicht mehr gebrauchten Rohre nach außen geführt werden und in einem Sammler 2 unter Umständen über schräge Anschlußstutzen eingebunden werden. Die verbleibende Rohrwand 1" wird eventuell weitergeführt und bildet eine Wandung des Kanales 9 über den die Feststoffe abgeführt werden. Die an die Flossenrohrwand 1 anschließende Rohwand 3 bzw. 3' verjüngt sich in der vertikalen Lage nach unten, wobei die überzähligen Rohre über Stutzen 5 in den Sammler 4 eingeleitet werden. Hierauf werden die verbleibenden Teile der Rohrwand 3 schräg abgebogen und bilden die Seitenwand 3" des Trichters. Diese Rohrwand ist dann mit der Trichterwand 1" in an sich bekannter Weise verbunden. Schließlich kann die Seitenwand 3" wieder in die Vertikale gebogen werden um eine weitere Wandung des Kanales 9 zu bilden. Bei dieser Trichterkonstruktion weisen benachbarte Rohrwände 1, 3 und 3' vor ihrem ersten Knick zur Bildung des Trichters eine unterschiedliche vertikale Längenerstreckung auf, wobei die nicht mehr im anschließenden schrägen Rohrwandteil 1 ' und 3" benötigten Rohre im schrägliegende Sammelkammern 4 bzw. 2 zumindestens zum Teil eingeleitet sind.1 shows a funnel-shaped combustion chamber floor which is divided into two outlets by an intermediate wall. The fins tube wall 1 is angled across its entire width and forms the funnel wall 1 '. This funnel wall 1 'is finally angled again in the vertical direction, tapering downwards. This is done by leading the pipes that are no longer used to the outside and, in some cases, integrating them in a collector 2 via inclined connecting pieces. The remaining tube wall 1 ″ is possibly continued and forms a wall of the channel 9 via which the solids are discharged. The raw wall 3 or 3 ′ adjoining the fin tube wall 1 tapers downwards in the vertical position, the excess tubes being connected via nozzles 5 be introduced into the collector 4. Then the remaining parts of the tube wall 3 are bent obliquely and form the side wall 3 "of the funnel. This tube wall is then connected to the funnel wall 1 "in a manner known per se. Finally, the side wall 3" can be bent back into the vertical in order to form a further wall of the channel 9. In this funnel construction, adjacent tube walls 1, 3 and 3 'have a different vertical length extension before their first kink to form the funnel, the tubes no longer required in the subsequent inclined tube wall part 1 ' and 3 "in the inclined collecting chambers 4 and 2 at least for Part initiated.
Schließlich sind noch zwei innere Trichterwände 8 vorgesehen, die kühlungsmäßig mit der Trichterwand 1" verbunden sind in dem die kürzeren Rohre der Trichterwand 1" nach jeweils einer 90' Krümmung in die Trichterwand 8 eingeleitet werden und die Auskleidung darstellen. Auch in diesem Fall kann die Trichterwand 8 in die Wandung des Kanales 9 übergeführt werden. Bei dieser Konstruktion ist es wesentlich, daß die längeren Rohre der Trichterwand 1" im Bereich der Trichterwand 8 einem Sammler 2', der etwa um die Hälfte kürzer ist als der Sammler 2, eingebunden werden.Finally, two inner funnel walls 8 are also provided, which are connected in terms of cooling to the funnel wall 1 ″ in which the shorter tubes of the funnel wall 1 ″ are introduced into the funnel wall 8 after each 90 ′ curvature and represent the lining. In this case too, the funnel wall 8 can be transferred into the wall of the channel 9. With this construction, it is essential that the longer tubes of the Funnel wall 1 "in the area of the funnel wall 8 a collector 2 ', which is about half shorter than the collector 2, can be integrated.
Durch diese Maßnahme der besonderen Trichterbildung läßt sich in relativ einfacher Wei¬ se auch die Auskleidung von komplizierten Flossenrohrwandkonstruktionen ausführen, wie sie beispielsweise bei Wirbelbettverbrennungsanlagen mit zirkulierender Wirbel¬ schicht insbesondere im Bereich der Rückführung des Wirbelmaterials in die Brennkam¬ mer vorliegen und die Innenflächen vollständig mit Kühlfächen auskleiden. Wenn diese Heizflächen relativ schwach beheizt sind so lassen sie sich zumindest teilweise in das Fallrohrsystem des Dampferzeugers einbinden, wobei zweckmäßigerweise die Rohre, die an den Sammelkammern 2 angeschlossen sind und die damit am tiefsten angeordnet sind, verwendet werden. Es ist so durchaus möglich, daß ein Teil der Flossenrohrwand 1 im Steigrohrsystem, während ein anderer Teil im Fallrohrsystem angeordnet ist.This measure of special funnel formation also makes it possible to carry out the lining of complicated fin tube wall constructions in a relatively simple manner, such as are present, for example, in fluidized bed combustion plants with a circulating fluidized bed, in particular in the region of the return of the fluidized material to the combustion chamber, and the inner surfaces are completely co-located Line cooling surfaces. If these heating surfaces are heated relatively weakly, they can be at least partially integrated into the downpipe system of the steam generator, the tubes which are connected to the collecting chambers 2 and which are therefore arranged at the lowest being expediently used. It is quite possible that part of the fin tube wall 1 is arranged in the riser pipe system, while another part is arranged in the down pipe system.
Die Fig. 1 unterscheidet sich von der Fig. 2 nicht nur durch eine geänderte Ansicht, son¬ dern auch durch die Einführung einer Zwischenwand 6, sodaß der von den Rohrwänden eingeschlossene Raum unterteilt ist. Hiebei ergeben sich Schaltungsänderungender Roh¬ re. Zuerst wird nur ein Teil der Rohre und zwar der längeren Rohre der Zwischenwand in den unteren Teil des Trichters eingeführt, während die kürzeren Rohre in einem Sammler 4' an der Unterseite der Trichterwand 1' münden. Die längeren Rohre werden in der Zwi¬ schenwand 6 verdichtet und nach einer Spreizung in die Trichterwände 8 eingebunden und zwar so, daß die einzelnen in der Zwischenwand 6 verdichtet angeordneten Rohre abwechselnd in eine der beiden schrägen Trichterwände 8 übergeführt werden. Dadurch sind die Rohre der Trichterwand 8 gegenüber der Fig. 1 einfacher verlegt und die in Fig. 1 als kürzere Sammler 2' bezeichneten Sammler sind im wesentlichen gleich groß wie die Sammler 2 und nehmen einen Großteil der Rohre der Trichterwand 1" auf. Die Ausklei¬ dung der Wände des anschließenden Kanals 9 kann ähnlich wie in Fig. 1 erfolgen. FIG. 1 differs from FIG. 2 not only by a modified view, but also by the introduction of an intermediate wall 6, so that the space enclosed by the tube walls is divided. Here there are changes in the circuitry. First, only a part of the tubes, namely the longer tubes of the intermediate wall, are introduced into the lower part of the funnel, while the shorter tubes open into a collector 4 'on the underside of the funnel wall 1'. The longer pipes are compressed in the intermediate wall 6 and, after spreading, are integrated into the funnel walls 8 in such a way that the individual pipes arranged in the intermediate wall 6 are alternately transferred into one of the two oblique funnel walls 8. As a result, the tubes of the funnel wall 8 are laid more easily than in FIG. 1 and the collectors designated as shorter collectors 2 'in FIG. 1 are essentially the same size as the collectors 2 and take up a large part of the tubes of the funnel wall 1 " ¬ the walls of the adjoining channel 9 can be done similarly as in Fig. 1.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Kühlflächenauskleidung für mehreckige Kammern von Dampferzeugern mit trichter¬ förmigem Boden und mit Feuerungen nach dem Prinzip der zirkulierenden Wirbel¬ schicht, die zumindest teilweise aus zwischen Sammlern wandweise ausgespannten Flossenrohrwänden mit im wesentlich vertikal verlaufenden Rohren, die im Bodenbe¬ reich zur Bildung eines Trichters konvergierend abgebogen sind, gebildet ist, dadurch gekennzeichnet, daß zwei gegenüberliegende Flossenrohrwände (1) im Trichterbe¬ reich - von oben nach unten betrachtet - zuerst in ihrer ganzen Breite eine gegenüber der Vertikalen geneigte Trichterwand (1*) und anschließend wenigstens eine vertikale Trichterwand (1") mit sich vermindernder Breite und zum Teil schrägliegenden Sammlern (2) bilden, und daß die angrenzende Rohrwand (3) und ihre gegenüberlie¬ gende Rohrwand (3') im Trichterbereich - von oben nach unten betrachtet - zuerst mit sich vermindernder Breite und schrägliegenden Sammlern (4) eine vertikale Trichterwand und anschließend mit konstanter verminderter Breite eine gegenüber der Vertikalen geneigte Seitenwand (3") des Trichters bilden.1. Cooling surface lining for polygonal chambers of steam generators with a funnel-shaped bottom and with firing according to the principle of the circulating fluidized bed, which at least partially consists of fin tube walls stretched out between collectors with tubes that run essentially vertically, and that in the bottom area form a funnel are converged, formed, characterized in that two opposing fin tube walls (1) in the funnel area - viewed from top to bottom - first in their entire width a funnel wall (1 * ) inclined to the vertical and then at least one vertical funnel wall ( 1 ") with decreasing width and partly inclined collectors (2), and that the adjacent tube wall (3) and its opposite tube wall (3 ') in the funnel area - viewed from top to bottom - first with decreasing width and slanting collectors (4) a vertical trich terwand and then with a constant reduced width form a side wall (3 ") of the funnel inclined to the vertical.
2. Kühlflächenauskleidung nach Anspruch 1, dadurch gekennzeichnet, daß die schräglie¬ genden Sammler (2, 4) durch zur Achse des Sammlers schräg angeordnete Stutzen (5) mit der Rohrwand (1, 3) verbunden sind.2. Cooling surface lining according to claim 1, characterized in that the inclined collector (2, 4) are connected to the pipe wall (1, 3) by connecting pieces (5) arranged obliquely to the axis of the collector.
3. Kühlflächenauskleidung nach Anspruch 1, dadurch gekennzeichnet, daß die schräglie¬ genden Sammler (2, 4) angrenzender Wände in unterschiedlichen Höhenlagen ange¬ ordnet sind.3. Cooling surface lining according to claim 1, characterized in that the inclined collector (2, 4) adjacent walls are arranged at different heights.
4. Kühlflächenauskleidung nach Anspruch 3, dadurch gekennzeichnet, daß der tieferge- legende schräge Sammler (2, 2') im Fallrohrsystem des Dampferzeugers angeordnet ist, sodaß die Flossen rohrwand (1) zum Teil dem Fallrohrsystem und zum anderen Teil dem Steigrohrsystem zugeordnet ist.4. cooling surface lining according to claim 3, characterized in that the lower-lying inclined collector (2, 2 ') arranged in the downpipe system of the steam generator is, so that the fins tube wall (1) is partially assigned to the downpipe system and the other part of the riser system.
5. Kühlflächenauskleidung nach Anspruch 1, dadurch gekennzeichnet, daß bei Trennung zweier nebeneinander liegender Trichterräume (7, 7') voneinander durch eine beiseitig beheizte Zwischenwand (6) die Rohre der Zwischenwand (6) abwechselnd in jeweils einer schrägen Trichterwand (8) fortgesetzt sind (Fig. 2).5. Cooling surface lining according to claim 1, characterized in that when two adjacent funnel spaces (7, 7 ') are separated from one another by a bilaterally heated intermediate wall (6), the tubes of the intermediate wall (6) are alternately continued in an inclined funnel wall (8) (Fig. 2).
6. Kühlflächenauskleidung nach Anspruch 1, dadurch gekennzeichnet, daß bei Ausklei¬ dung zweier nebeneinander liegender Trichterräume ohne Zwischenwand die Rohre der sich schneidenden schrägen Trichterwände (8) in die benachbarte vertikale Trichterwand (1") geführt sind und nur der längere Teil der vertikalen Rohre der sich schneidenden schrägen Trichterwände (8) in die schräg liegenden Sammler (2') einge¬ leitet ist (Fig.1 ).6. cooling surface lining according to claim 1, characterized in that when lining two adjacent funnel spaces without a partition, the tubes of the intersecting oblique funnel walls (8) are guided into the adjacent vertical funnel wall (1 ") and only the longer part of the vertical tubes the intersecting sloping hopper walls (8) is introduced into the sloping collector (2 ') (FIG. 1).
7. Kühlflacheneinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Rohrwän¬ de (1, 3, 3') in ihrer vertikalen Längserstreckung vor dem ersten Knick eine unter¬ schiedliche Länge aufweisen und dann abwechselnd Knicke um einen stumpfen Win¬ kel in die Schräge bzw. Vertikale aufweisen, wobei die im anschließenden Wandab¬ schnitt nicht mehr benötigten Rohre zumindest zum Teil in schrägliegende Sammler (2 bzw.4) eingeleitet sind. 7. Cooling surface device according to claim 1, characterized in that the Rohrwän¬ de (1, 3, 3 ' ) in their vertical longitudinal extension before the first kink have a different length and then alternately kinks around a blunt angle in the slope or vertical, wherein the pipes that are no longer required in the subsequent wall section are at least partially introduced into inclined collectors (2 or 4).
EP95944757A 1994-10-17 1995-10-16 Cooling surface cladding Expired - Lifetime EP0787272B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1952/94 1994-10-17
AT0195294A AT401287B (en) 1994-10-17 1994-10-17 COOLING SURFACE LINING
PCT/AT1995/000203 WO1996012140A1 (en) 1994-10-17 1995-10-16 Cooling surface cladding

Publications (2)

Publication Number Publication Date
EP0787272A1 true EP0787272A1 (en) 1997-08-06
EP0787272B1 EP0787272B1 (en) 1999-02-17

Family

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Application Number Title Priority Date Filing Date
EP95944757A Expired - Lifetime EP0787272B1 (en) 1994-10-17 1995-10-16 Cooling surface cladding

Country Status (11)

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US (1) US5775265A (en)
EP (1) EP0787272B1 (en)
AT (1) AT401287B (en)
AU (1) AU3693695A (en)
CZ (1) CZ283415B6 (en)
DE (1) DE59505128D1 (en)
FI (1) FI971577A0 (en)
GR (1) GR3029828T3 (en)
PL (1) PL319734A1 (en)
SK (1) SK282951B6 (en)
WO (1) WO1996012140A1 (en)

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CN104344401B (en) * 2013-08-09 2016-09-14 中国科学院工程热物理研究所 Boiler hearth of circulating fluidized bed with variable cross-section water-cooled column

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WO2015090104A1 (en) * 2013-12-20 2015-06-25 中国科学院工程热物理研究所 Comb teeth type water-cooled column and hearth having same
US10495298B2 (en) 2013-12-20 2019-12-03 Institute Of Engineering Thermophysics, Chinese Academy Of Sciences Comb tooth type water-cooled column and furnace having the same

Also Published As

Publication number Publication date
FI971577A (en) 1997-04-15
DE59505128D1 (en) 1999-03-25
CZ283415B6 (en) 1998-04-15
ATA195294A (en) 1995-12-15
WO1996012140A1 (en) 1996-04-25
SK47597A3 (en) 1998-06-03
SK282951B6 (en) 2003-01-09
FI971577A0 (en) 1997-04-15
AT401287B (en) 1996-07-25
EP0787272B1 (en) 1999-02-17
GR3029828T3 (en) 1999-06-30
AU3693695A (en) 1996-05-06
PL319734A1 (en) 1997-08-18
CZ109597A3 (en) 1997-09-17
US5775265A (en) 1998-07-07

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