EP0629274B1 - Arrangement of a steam generator in a support structure - Google Patents

Arrangement of a steam generator in a support structure Download PDF

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Publication number
EP0629274B1
EP0629274B1 EP93903826A EP93903826A EP0629274B1 EP 0629274 B1 EP0629274 B1 EP 0629274B1 EP 93903826 A EP93903826 A EP 93903826A EP 93903826 A EP93903826 A EP 93903826A EP 0629274 B1 EP0629274 B1 EP 0629274B1
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EP
European Patent Office
Prior art keywords
section
supporting
flue gas
gas channel
arrangement according
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EP93903826A
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German (de)
French (fr)
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EP0629274A1 (en
Inventor
Georg Lösel
Werner Kraupa
Reiner Engelhardt
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Siemens AG
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Siemens AG
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    • 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
    • F22B37/24—Supporting, suspending, or setting arrangements, e.g. heat shielding
    • F22B37/244—Supporting, suspending, or setting arrangements, e.g. heat shielding for water-tube steam generators suspended from the top
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S248/00—Supports
    • Y10S248/91—Weighted base

Definitions

  • the invention relates to an arrangement of a steam generator, in particular a smoldering furnace, with a flue gas duct having a plurality of sections in a supporting structure, a first vertically running section being connected to a likewise vertically running third section via an at least approximately horizontally running second section is, so that the flue gas duct forms a structural unit, and wherein the first section is suspended by means of supporting elements in the supporting structure.
  • the hot flue gases generated in a combustion chamber flow through a flue gas duct which essentially comprises three sections.
  • the walls of the flue gas duct have heating surfaces in the form of tubes or tube bundles, which are integrated in a water-steam cycle.
  • the combustion chamber represents a first vertical section of the flue gas channel.
  • the combustion chamber is connected via a horizontally running second section of the flue gas channel to a third section, which also runs vertically and opens into a waste heat boiler for steam generation.
  • the water flowing in the heating surfaces serves to cool the combustion chamber and the waste heat boiler and is at least partially evaporated by indirect heat exchange with the hot flue gas.
  • the fuel for the combustion chamber is e.g. Smoldering gas from a smoldering plant is used.
  • a smoldering plant is e.g. known from EP-PS 0 302 310.
  • the sections of the flue gas duct ie the heating surfaces of the combustion chamber and the waste heat boiler, are usually structurally separated from one another.
  • the combustion chamber is cooled in a so-called forced circulation, while the waste heat boiler is cooled in a natural circulation.
  • Thermal expansion has so far been avoided in that the heating surfaces of the combustion chamber and those of the waste heat boiler are structurally separate from one another.
  • the combustion chamber is cooled in a so-called forced circulation, while the waste heat boiler is cooled in a natural circulation.
  • the invention has for its object to form the flue gas duct of the combustion chamber and the waste heat boiler essentially formed by the heating surfaces as a structural unit which enables free thermal expansion both in the vertical and in the horizontal direction.
  • the support elements in the cold state have an inclined position relative to the vertical, which essentially corresponds to the thermal expansion of the second, horizontal section in the warm state, so that the support elements run parallel to the vertical in the warm state.
  • the supporting elements are expediently pipes which are connected to heating surfaces which at least partially form the walls of the flue gas duct.
  • the pipes are connected to the water-steam cycle together with the heating surfaces.
  • means for guiding the first relative to the third section of the flue gas duct are provided in the area of the longitudinal axes of the first and third sections, the longitudinal axis of the third section serving as a fixed axis.
  • the guide means are expediently pipes which are also connected to the heating surfaces which at least partially form the walls of the flue gas duct.
  • the first section of the rough gas duct is arranged in a first supporting grate, which is connected by means of the supporting elements to a second supporting grate arranged above the flue gas duct and by means of at least one connecting element to a third supporting grate arranged below the flue gas duct.
  • the flue gas duct is supported on the third support grid suspended from the second support grid.
  • the first supporting grate is expediently designed as a frame which surrounds the first section of the flue gas duct.
  • the third section is advantageously suspended from the second supporting grate by means of further supporting elements.
  • the third support grate can be connected to the second support grate via at least one further connecting element.
  • the connecting elements and / or the further supporting elements are expediently pipes connected to the heating surfaces.
  • FIG. 1 shows the arrangement of a steam generator in a supporting structure 1.
  • the steam generator is part of a smoldering and burning system, not shown in detail.
  • the steam generator comprises a flue gas duct which has three sections 3, 4 and 5.
  • the first section 3 is essentially formed by a combustion chamber 6 and extends vertically. It is connected via the approximately horizontally running second section 4 to the likewise vertically running third section 5, which opens into a waste heat boiler 10. Heating surfaces for steam generation are arranged in the waste heat boiler 10 in a manner not shown in detail.
  • the flue gas duct from sections 3, 4 and 5 is suspended in the supporting structure 1.
  • it is supported on a lower support grid 15.
  • This is connected to an upper supporting grate 20 via connecting elements 17 and 18 and at least one supporting element 16.
  • the first section 3 of the flue gas duct is additionally guided by a supporting grate 21 which is suspended from the upper supporting grate 20 via supporting elements 16 and 19.
  • support elements 40, 41 can also be provided (shown in dashed lines), with which the section 5 is suspended directly on the upper support grate 20.
  • the flue gas duct is essentially delimited by heating surfaces 12 integrated in its walls, which are usually designed in the form of tubes or tube bundles.
  • the heating surfaces 12 of sections 3, 4 and 5 are connected to one another, so that the flue gas duct forms a structural unit.
  • the heating surfaces 12 are connected in a water-steam circuit, not shown in any more detail, and water or a water-steam mixture flows through them in the natural circulation.
  • the connecting elements 17 and 18 and the support elements 16, 19, 40, 41 are advantageously also integrated into the natural circulation system of the water-steam cycle.
  • the section 5 can also have a (not shown) air-cooled lining over part of its height instead of heating surfaces through which water or steam flows.
  • the water-cooled and air-cooled heating surfaces are then connected to one another in a gas-tight manner in a manner not shown by means of a compensator.
  • Pendulum suspensions 23 connected to the first section 3 of the flue gas duct are provided below the supporting grate 21.
  • supports 24 connected to the supporting grate 15 are provided below the supporting grate 21.
  • the support elements 16 and 19 run obliquely with respect to the vertical in the cold state, ie before the steam generator is started up, and assume positions 16 'and 19', respectively.
  • the inclination is caused by the fact that the flue gas duct or boiler body contracts in relation to the warm state.
  • the inclination essentially corresponds to the thermal expansion of the second section 4 in the warm state, ie during the operation of the steam generator. This ensures that the two longitudinal axes 25 and 26 run parallel in the warm state.
  • guide means 35 are expediently provided in the region of the longitudinal axes 25 and 26 of sections 3 and 5, respectively.
  • the guide means 35 are advantageously connected to the heating surfaces 12 of the two sections 3 and 5 and also integrated into the natural circulation system. They therefore always have the same temperature as the heating surfaces 12 of the second section 4 of the flue gas duct.
  • the plane spanned by the longitudinal axes 25 and 26 remains independent of thermal expansions fixed plane 30 which, according to FIG. 2, runs perpendicular to the plane of the drawing.
  • the plane 32 which is perpendicular to this fixed plane 30 and in which the longitudinal axis 26 lies, always remains a fixed plane.
  • the guide elements 35 can also be designed in a simple manner as tie rods and can be connected to the supporting grate 21 in the region of the first section 3 of the flue gas duct.
  • the supporting grate 21 encloses the first section 3 in the form of a frame.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Incineration Of Waste (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
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Abstract

A steam generator configuration, in particular of a low temperature carbonization-combustion plant, includes a supporting structure. A flue gas channel is disposed in the supporting structure and has a first vertical segment, a second at least approximately horizontal segment, and a third vertical segment being connected through the second segment to the first segment to form a structural unit. Supporting members suspend the first segment in the supporting structure in order to avoid restrictions to expansion and deformation of the flue gas channel as a result of thermal expansion. The supporting members are in an oblique or slanted position relative to the vertical in a cold condition. The oblique position essentially corresponds to a thermal expansion of the second horizontal segment in a hot condition. The supporting elements are parallel to the vertical in the hot condition. Thus, regardless of the operating state, the flue gas channel remains a structural unit that allows free thermal expansion in the vertical and horizontal directions.

Description

Die Erfindung bezieht sich auf eine Anordnung eines Dampferzeugers, insbesondere einer Schwel-Brenn-Anlage, mit einem mehrere Abschnitte aufweisenden Rauchgaskanal in einer Tragkonstruktion, wobei ein erster vertikal verlaufender Abschnitt über einen mindestens annähernd horizontal verlaufenden zweiten Abschnitt mit einem ebenfalls vertikal verlaufenden dritten Abschnitt verbunden ist, so daß der Rauchgaskanal eine Konstruktive Einheit bildet, und wobei der erste Abschnitt mittels Tragelementen in der Trag Konstruktion aufgehängt ist.The invention relates to an arrangement of a steam generator, in particular a smoldering furnace, with a flue gas duct having a plurality of sections in a supporting structure, a first vertically running section being connected to a likewise vertically running third section via an at least approximately horizontally running second section is, so that the flue gas duct forms a structural unit, and wherein the first section is suspended by means of supporting elements in the supporting structure.

Bei einem derartigen, aus der US-PS 3,001,514 bekannten Dampferzeuger durchströmen die in einer Brennkammer erzeugten Heißen Rauchgase einen Rauchgaskanal, der im wesentlichen drei Abschnitte umfaßt. Die Wände des Rauchgaskanals weisen Heizflächen in Form von Rohren oder Rohrbündeln auf, die in einen Wasser-Dampf-Kreislauf integriert sind. Dabei stellt die Brennkammer einen ersten vertikal verlaufenden Abschnitt des Rauchgaskanals dar. Die Brennkammer ist über einen horizontal verlaufenden zweiten Abschnitt des Rauchgaskanals mit einem dritten Abschnitt verbunden, der ebenfalls vertikal verläuft und in einen Abhitzekessel zur Dampferzeugung mündet. Das in den Heizflächen strömende Wasser dient zur Kühlung der Brennkammer und des Abhitzekessels und wird durch indirekten Wärmetausch mit dem Heißen Rauchgas mindestens teilweise verdampft. Als Brennstoff für die Brennkammer wird z.B. Schwelgas aus einer Schwelanlage verwendet. Eine Schwel-Brenn-Anlage ist z.B. aus der EP-PS 0 302 310 bekannt.In such a steam generator known from US Pat. No. 3,001,514, the hot flue gases generated in a combustion chamber flow through a flue gas duct which essentially comprises three sections. The walls of the flue gas duct have heating surfaces in the form of tubes or tube bundles, which are integrated in a water-steam cycle. The combustion chamber represents a first vertical section of the flue gas channel. The combustion chamber is connected via a horizontally running second section of the flue gas channel to a third section, which also runs vertically and opens into a waste heat boiler for steam generation. The water flowing in the heating surfaces serves to cool the combustion chamber and the waste heat boiler and is at least partially evaporated by indirect heat exchange with the hot flue gas. The fuel for the combustion chamber is e.g. Smoldering gas from a smoldering plant is used. A smoldering plant is e.g. known from EP-PS 0 302 310.

Um Dehnungsbehinderungen und Verzerrungen der räumlichen Anordnung des Dampferzeugers infolge von vertikalen und horizontalen Wärmedehnungen zu kompensieren, sind üblicherweise die Abschnitte des Rauchgaskanals, d.h. die Heizflächen der Brennkammer und des Abhitzekessels, konstruktiv voneinander getrennt. Dabei erfolgt die Kühlung der Brennkammer im sogenannten Zwangumlauf, während die Kühlung des Abhitzekessels im Naturumlauf erfolgt.In order to compensate for expansion obstructions and distortions in the spatial arrangement of the steam generator as a result of vertical and horizontal thermal expansions, the sections of the flue gas duct, ie the heating surfaces of the combustion chamber and the waste heat boiler, are usually structurally separated from one another. The combustion chamber is cooled in a so-called forced circulation, while the waste heat boiler is cooled in a natural circulation.

Wärmedehnungen werden bisher dadurch vermieden, daß die Heizflächen der Brennkammer und die des Abhitzekessels konstruktiv voneinander getrennt sind. Dabei erfolgt die Kühlung der Brennkammer im sogenannten Zwangumlauf, während die Kühlung des Abhitzekessels im Naturumlauf erfolgt.Thermal expansion has so far been avoided in that the heating surfaces of the combustion chamber and those of the waste heat boiler are structurally separate from one another. The combustion chamber is cooled in a so-called forced circulation, while the waste heat boiler is cooled in a natural circulation.

Der Erfindung liegt die Aufgabe zugrunde, den im wesentlichen durch die Heizflächen gebildeten Rauchgaskanal der Brennkammer und des Abhitzekessels als konstruktive Einheit auszubilden, die eine freie Wärmedehnung sowohl in vertikaler als auch in horizontaler Richtung ermöglicht.The invention has for its object to form the flue gas duct of the combustion chamber and the waste heat boiler essentially formed by the heating surfaces as a structural unit which enables free thermal expansion both in the vertical and in the horizontal direction.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Tragelemente in kaltem Zustand eine gegenüber der Vertikalen schräg verlaufende Position aufweisen, die im wesentlichen der Wärmedehnung des zweiten, horizontalen Abschnitts im warmen Zustand entspricht, so daß die Tragelemente im warmen Zustand parallel zur Vertikalen verlaufen.This object is achieved in that the support elements in the cold state have an inclined position relative to the vertical, which essentially corresponds to the thermal expansion of the second, horizontal section in the warm state, so that the support elements run parallel to the vertical in the warm state.

Die Tragelemente sind zweckmäßigerweise Rohre, die mit mindestens teilweise die Wände des Rauchgaskanals bildenden Heizflächen verbunden sind. Dabei sind die Rohre zusammen mit den Heizflächen in den Wasser-Dampf-Kreislauf geschaltet.The supporting elements are expediently pipes which are connected to heating surfaces which at least partially form the walls of the flue gas duct. The pipes are connected to the water-steam cycle together with the heating surfaces.

Im Bereich der Längsachsen des ersten und des dritten Abschnitts sind in vorteilhafter Ausgestaltung Mittel zum Führen des ersten gegenüber dem dritten Abschnitt des Rauchgaskanals vorgesehen, wobei die Längsachse des dritten Abschnitts als Festachse dient. Dabei sind die Führungsmittel zweckmäßigerweise Rohre, die ebenfalls mit den mindestens teilweise die Wände des Rauchgaskanals bildenden Heizflächen verbunden sind. Durch eine derartige Einbindung der Führungsmittel in den Wasser-Dampf-Kreislauf ist dort die Temperatur stets gleich der Temperatur der Heizflächen im zweiten Abschnitt des Rauchgaskanals. Dadurch wird erreicht, daß auch bei unterschiedlichen horizontalen Wärmedehnungen die Längsachsen des ersten und dritten Abschnitts des Rauchgaskanals stets parallel verlaufen.In an advantageous embodiment, means for guiding the first relative to the third section of the flue gas duct are provided in the area of the longitudinal axes of the first and third sections, the longitudinal axis of the third section serving as a fixed axis. The guide means are expediently pipes which are also connected to the heating surfaces which at least partially form the walls of the flue gas duct. By integrating the guide means in the water-steam cycle in this way, the temperature there is always the same as the temperature of the heating surfaces in the second section of the flue gas duct. Thereby is achieved that the longitudinal axes of the first and third sections of the flue gas channel always run parallel even with different horizontal thermal expansions.

Der erste Abschnitt des Raugaskanals ist in zweckmäßiger Ausgestaltung in einem ersten Tragrost angeordnet, der mittels der Tragelemente mit einem oberhalb des Rauchgaskanals angeordneten zweiten Tragrost und mittels mindestens eines Verbindungselements mit einem unterhalb des Rauchgaskanals angeordneten dritten Tragrost verbunden ist. Dabei stützt stützt sich der Rauchgaskanal auf dem am zweiten Tragrost aufgehängten dritten Tragrost ab. Der erste Tragrost ist zweckmäßigerweise als Rahmen ausgebildet, der den ersten Abschnitt des Rauchgaskanals umschließt.In an expedient embodiment, the first section of the rough gas duct is arranged in a first supporting grate, which is connected by means of the supporting elements to a second supporting grate arranged above the flue gas duct and by means of at least one connecting element to a third supporting grate arranged below the flue gas duct. The flue gas duct is supported on the third support grid suspended from the second support grid. The first supporting grate is expediently designed as a frame which surrounds the first section of the flue gas duct.

Der dritte Abschnitt ist vorteilhafterweise mittels weiterer Tragelemente an dem zweiten Tragrost aufgehängt. Alternativ kann der dritte Tragrost über mindestens ein weiteres Verbindungselement mit dem zweiten Tragrost verbunden sein. Die Verbindungselemente und/oder die weiteren Tragelemente sind zweckmäßigerweise mit den Heizflächen verbundene Rohre.The third section is advantageously suspended from the second supporting grate by means of further supporting elements. Alternatively, the third support grate can be connected to the second support grate via at least one further connecting element. The connecting elements and / or the further supporting elements are expediently pipes connected to the heating surfaces.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß trotz der im warmen Zustand zwangsläufig auftretenden horizontalen und vertikalen Wärmedehnungen die räumliche Anordnung des Rauchgaskanals stets gleich bleibt. Dabei treten in allen Abschnitten und in Ebenen gleicher Höhe stets gleiche vertikale Wärmedehnungen auf, während die Längsachsen des ersten und dritten Abschnitts horizontalen Wärmedehnungen stets gemeinsam und parallel verlaufend folgen.The advantages achieved by the invention consist in particular in that, despite the horizontal and vertical thermal expansions which necessarily occur in the warm state, the spatial arrangement of the flue gas duct always remains the same. The same vertical thermal expansions always occur in all sections and at levels of the same height, while the longitudinal axes of the first and third sections always follow horizontal thermal expansions running together and in parallel.

Ausführungsbeispiele der Erfindung werden anhand einer Zeichnung näher erläutert; darin zeigen:

  • Figur 1 schematisch einen in einer Tragkonstruktion angeordneten Dampferzeuger einer Schwel-Brenn-Anlage,
  • Figur 2 einen Querschnitt durch zwei Abschnitte eines Rauchgaskanals des Dampferzeugers gemäß Figur 1 und
  • Figur 3 in einem weiteren Querschnitt Führungsmittel zwischen zwei vertikalen Abschnitten des Rauchgaskanals gemäß Figur 1.
Embodiments of the invention are explained in more detail with reference to a drawing; show in it:
  • FIG. 1 schematically shows a steam generator of a smoldering furnace arranged in a supporting structure,
  • Figure 2 shows a cross section through two sections of a flue gas duct of the steam generator according to Figure 1 and
  • 3 shows a further cross section of guide means between two vertical sections of the flue gas duct according to FIG. 1.

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided with the same reference symbols in all figures.

Figur 1 zeigt die Anordnung eines Dampferzeugers in einer Tragkonstruktion 1. Der Dampferzeuger ist Teil einer nicht näher dargestellten Schwel-Brenn-Anlage. Der Dampferzeuger umfaßt einen Rauchgaskanal, der drei Abschnitte 3, 4 und 5 aufweist. Der erste Abschnitt 3 wird im wesentlichen von einer Brennkammer 6 gebildet und verläuft vertikal. Er ist über den annähernd horizontal verlaufenden zweiten Abschnitt 4 mit dem ebenfalls vertikal verlaufenden dritten Abschnitt 5 verbunden, der in einen Abhitzekessel 10 mündet. In dem Abhitzekessel 10 sind in nicht näher dargestellter Art und Weise Heizflächen zur Dampferzeugung angeordnet.FIG. 1 shows the arrangement of a steam generator in a supporting structure 1. The steam generator is part of a smoldering and burning system, not shown in detail. The steam generator comprises a flue gas duct which has three sections 3, 4 and 5. The first section 3 is essentially formed by a combustion chamber 6 and extends vertically. It is connected via the approximately horizontally running second section 4 to the likewise vertically running third section 5, which opens into a waste heat boiler 10. Heating surfaces for steam generation are arranged in the waste heat boiler 10 in a manner not shown in detail.

Der Rauchgaskanal aus den Abschnitten 3, 4 und 5 ist in der Tragkonstruktion 1 aufgehängt. Dazu stützt er sich auf einem unteren Tragrost 15 ab. Dieser ist über Verbindungselemente 17 und 18 sowie mindestens ein Tragelement 16 mit einem oberen Tragrost 20 verbunden. Der erste Abschnitt 3 des Rauchgaskanals wird zusätzlich von einem Tragrost 21 geführt, der über Tragelemente 16 und 19 an dem oberen Tragrost 20 aufgehängt ist. Anstelle des Verbindungselements 18 können auch (gestrichelt dargestellte) Tragelemente 40, 41 vorgesehen sein, mit denen der Abschnitt 5 direkt an dem oberen Tragrost 20 aufgehängt ist.The flue gas duct from sections 3, 4 and 5 is suspended in the supporting structure 1. For this purpose, it is supported on a lower support grid 15. This is connected to an upper supporting grate 20 via connecting elements 17 and 18 and at least one supporting element 16. The first section 3 of the flue gas duct is additionally guided by a supporting grate 21 which is suspended from the upper supporting grate 20 via supporting elements 16 and 19. Instead of the connecting element 18, support elements 40, 41 can also be provided (shown in dashed lines), with which the section 5 is suspended directly on the upper support grate 20.

Der Rauchgaskanal wird im wesentlichen durch in dessen Wände integrierte Heizflächen 12 begrenzt, die üblicherweise in Form von Rohren oder Rohrbündeln ausgebildet sind. Die Heizflächen 12 der Abschnitte 3, 4 und 5 sind miteinander verbunden, so daß der Rauchgaskanal eine konstruktive Einheit bildet. Die Heizflächen 12 sind in einen nicht näher dargestellten Wasser-Dampf-Kreislauf geschaltet und werden im Naturumlauf von Wasser oder einem Wasser-Dampf-Gemisch durchströmt. Die Verbindungselemente 17 und 18 sowie die Tragelemente 16, 19, 40, 41 sind vorteilhafterweise ebenfalls in das Naturumlaufsystem des Wasser-Dampf-Kreislaufs integrierte Rohre.The flue gas duct is essentially delimited by heating surfaces 12 integrated in its walls, which are usually designed in the form of tubes or tube bundles. The heating surfaces 12 of sections 3, 4 and 5 are connected to one another, so that the flue gas duct forms a structural unit. The heating surfaces 12 are connected in a water-steam circuit, not shown in any more detail, and water or a water-steam mixture flows through them in the natural circulation. The connecting elements 17 and 18 and the support elements 16, 19, 40, 41 are advantageously also integrated into the natural circulation system of the water-steam cycle.

Der Abschnitt 5 kann über einen Teil seiner Höhe anstelle von mit Wasser oder Wasserdampf durchströmten Heizflächen auch eine (nicht dargestellte) mit Luft gekühlte Auskleidung aufweisen. Die wassergekühlten und luftgekühlten Heizflächen sind dann in nicht näher dargestellter Art und Weise mittels eines Kompensators gasdicht miteinander verbunden.The section 5 can also have a (not shown) air-cooled lining over part of its height instead of heating surfaces through which water or steam flows. The water-cooled and air-cooled heating surfaces are then connected to one another in a gas-tight manner in a manner not shown by means of a compensator.

Unterhalb des Tragrosts 21 sind mit dem ersten Abschnitt 3 des Rauchgaskanals verbundene Pendelaufhängungen 23 vorgesehen. Unterhalb des zweiten Abschnitts 4 des Rauchgaskanals sind mit dem Tragrost 15 verbundene Stützen 24 vorgesehen.Pendulum suspensions 23 connected to the first section 3 of the flue gas duct are provided below the supporting grate 21. Below the second section 4 of the flue gas duct, supports 24 connected to the supporting grate 15 are provided.

Wie in Figur 1 durch die gestrichelten Linien 16' und 19' angedeutet, verlaufen die Tragelemente 16 und 19 im kalten Zustand, d.h. vor Inbetriebnahme des Dampferzeugers, in bezug auf die Vertikale schräg und nehmen die Positionen 16' bzw. 19' ein. Die Schrägstellung wird dadurch bewirkt, daß sich der Rauchgaskanal oder Kesselkörper gegenüber dem warmen Zustand zusammenzieht. Dabei entspricht die Neigung im wesentlichen der Wärmedehnung des zweiten Abschnitts 4 im warmen Zustand, d.h. während des Betriebs des Dampferzeugers. Dadurch wird erreicht, daß im warmen Zustand die beiden Längsachsen 25 und 26 parallel verlaufen.As indicated in FIG. 1 by the dashed lines 16 'and 19', the support elements 16 and 19 run obliquely with respect to the vertical in the cold state, ie before the steam generator is started up, and assume positions 16 'and 19', respectively. The inclination is caused by the fact that the flue gas duct or boiler body contracts in relation to the warm state. The inclination essentially corresponds to the thermal expansion of the second section 4 in the warm state, ie during the operation of the steam generator. This ensures that the two longitudinal axes 25 and 26 run parallel in the warm state.

Durch die Schrägstellung der Tragelemente 16, 19 in die Positionen 16' bzw. 19' tritt im Abschnitt 3 eine Kraftkomponente auf, die diesen Abschnitt 3 ebenfalls in eine Schrägstellung zwingt. Um dies zu vermeiden, sind zweckmäßigerweise im Bereich der Längsachsen 25 und 26 der Abschnitte 3 bzw. 5 Führungsmittel 35 vorgesehen. Die Führungsmittel 35 sind vorteilhafterweise mit den Heizflächen 12 der beiden Abschnitte 3 und 5 verbundene Rohre und ebenfalls in das Naturumlaufsystem integriert. Sie haben somit stets die gleiche Temperatur wie die Heizflächen 12 des zweiten Abschnitts 4 des Rauchgaskanals.Due to the inclined position of the support elements 16, 19 in the positions 16 'and 19', a force component occurs in section 3, which also forces this section 3 into an inclined position. To avoid this, guide means 35 are expediently provided in the region of the longitudinal axes 25 and 26 of sections 3 and 5, respectively. The guide means 35 are advantageously connected to the heating surfaces 12 of the two sections 3 and 5 and also integrated into the natural circulation system. They therefore always have the same temperature as the heating surfaces 12 of the second section 4 of the flue gas duct.

Beim Betrieb des Dampferzeugers bleibt somit die durch die Längsachsen 25 und 26 aufgespannte Ebene unabhängig von Wärmedehnungen Festebene 30, die gemäß Figur 2 senkrecht zur Zeichenebene verläuft. Ebenso bleibt die zu dieser Festebene 30 senkrecht verlaufende Ebene 32, in der die Längsachse 26 liegt, stets Festebene. Dadurch bleibt die konstruktive Einheit des Rauchgaskanals sowohl bei vertikalen als auch bei horizontalen Wärmedehnungen erhalten.When the steam generator is in operation, the plane spanned by the longitudinal axes 25 and 26 remains independent of thermal expansions fixed plane 30 which, according to FIG. 2, runs perpendicular to the plane of the drawing. Likewise, the plane 32, which is perpendicular to this fixed plane 30 and in which the longitudinal axis 26 lies, always remains a fixed plane. As a result, the constructive unit of the flue gas duct is preserved in both vertical and horizontal thermal expansions.

Wie Figur 3 zeigt, können die Führungselemente 35 auch in einfacher Weise als Zuganker ausgebildet und im Bereich des ersten Abschnitts 3 des Rauchgaskanals mit dem Tragrost 21 verbunden sein. Dabei umschließt der Tragrost 21 den ersten Abschnitt 3 in Form eines Rahmens.As FIG. 3 shows, the guide elements 35 can also be designed in a simple manner as tie rods and can be connected to the supporting grate 21 in the region of the first section 3 of the flue gas duct. The supporting grate 21 encloses the first section 3 in the form of a frame.

Claims (9)

  1. Steam generator arrangement, in particular of a low temperature carbonization combustion plant, with a flue gas channel, having several sections (3, 4, 5), in a supporting structure (1), whereby a first vertically extending section (3) is connected by way of a second at least approximately horizontally extending section (4) to a likewise vertically extending third section (5), so that the flue gas channel forms a structural unit, and whereby the first section (3) is suspended by means of supporting elements (16, 19) in the supporting structure (1), characterized in that the supporting elements (16, 19) in the cold condition have an oblique position (16', 19') in relation to the vertical, which position essentially corresponds to the thermal expansion of the second, horizontal section (4) in the hot condition, with the result that the supporting elements (16, 19) extend parallel to the vertical in the hot condition.
  2. Arrangement according to claim 1,
    characterized in that the supporting elements (16, 19) are tubes which are connected to heating surfaces (12) forming the walls of the flue gas channel at least in part.
  3. Arrangement according to claim 1 or 2,
    characterized in that in the region of the longitudinal axes (25, 26) of the first and the third section (3 and 5) means (35) are provided to guide the first section (3) relative to the third section (5), whereby the longitudinal axis (26) of the third section (5) is used as a fixed axis.
  4. Arrangement according to claim 3,
    characterized in that the guide means (35) are tubes which are connected to heating surfaces (12) forming 5 the walls of the flue gas channel at least in part.
  5. Arrangement according to one of claims 1 to 4,
    characterized in that the first section (3) of the flue gas channel is arranged in a first supporting grate (21) which is connected by means of the supporting elements (16, 19) to a second supporting grate (20) arranged above the flue gas channel and by means of at least one connecting element (17) to a third supporting grate (15) arranged below the flue gas channel, whereby the flue gas channel is supported on the third supporting grate (15) suspended from the second supporting grate (20).
  6. Arrangement according to claim 5,
    characterized in that the first supporting grate (21) is constructed as a frame and encloses the first section (3).
  7. Arrangement according to claim 5 or 6,
    characterized in that the third section (5) is suspended by means of further supporting elements (40, 41) from the second supporting grate (20).
  8. Arrangement according to one of claims 5 or 6,
    characterized in that the third supporting grate (15) is connected by means of at least one further connecting element (18) to the second supporting grate (20).
  9. Arrangement according to one of claims 5 to 8,
    characterized in that the connecting elements (17, 18) and/or the additional supporting elements (40, 41) are tubes connected to the heating surfaces (12).
EP93903826A 1992-03-03 1993-02-24 Arrangement of a steam generator in a support structure Expired - Lifetime EP0629274B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4206657 1992-03-03
DE4206657A DE4206657C2 (en) 1992-03-03 1992-03-03 Arrangement of a steam generator in a supporting structure
PCT/DE1993/000163 WO1993018340A1 (en) 1992-03-03 1993-02-24 Arrangement of a steam generator in a support structure

Publications (2)

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EP0629274A1 EP0629274A1 (en) 1994-12-21
EP0629274B1 true EP0629274B1 (en) 1996-08-14

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EP93903826A Expired - Lifetime EP0629274B1 (en) 1992-03-03 1993-02-24 Arrangement of a steam generator in a support structure

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US (1) US5551381A (en)
EP (1) EP0629274B1 (en)
JP (1) JPH07504487A (en)
CN (1) CN1041858C (en)
AT (1) ATE141398T1 (en)
DE (2) DE4206657C2 (en)
ES (1) ES2092813T3 (en)
HU (1) HU214400B (en)
WO (1) WO1993018340A1 (en)

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Publication number Publication date
DE4206657C2 (en) 1997-01-09
JPH07504487A (en) 1995-05-18
ATE141398T1 (en) 1996-08-15
DE4206657A1 (en) 1993-09-09
HU214400B (en) 1998-03-30
HU9402540D0 (en) 1994-11-28
HUT67896A (en) 1995-03-22
CN1079284A (en) 1993-12-08
ES2092813T3 (en) 1996-12-01
WO1993018340A1 (en) 1993-09-16
US5551381A (en) 1996-09-03
CN1041858C (en) 1999-01-27
DE59303445D1 (en) 1996-09-19
EP0629274A1 (en) 1994-12-21

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