EP0233998A1 - Preset flue gas temperature-adjusting device - Google Patents

Preset flue gas temperature-adjusting device Download PDF

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Publication number
EP0233998A1
EP0233998A1 EP86115200A EP86115200A EP0233998A1 EP 0233998 A1 EP0233998 A1 EP 0233998A1 EP 86115200 A EP86115200 A EP 86115200A EP 86115200 A EP86115200 A EP 86115200A EP 0233998 A1 EP0233998 A1 EP 0233998A1
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EP
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Prior art keywords
flue gas
partition
flue
steam generator
duct
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EP86115200A
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German (de)
French (fr)
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EP0233998B1 (en
Inventor
Manfred Klein
Wilhelm Lindermann
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Deutsche Babcock Werke AG
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Deutsche Babcock Werke AG
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Application filed by Deutsche Babcock Werke AG filed Critical Deutsche Babcock Werke AG
Priority to AT86115200T priority Critical patent/ATE51063T1/en
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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
    • F22B37/008—Adaptations for flue gas purification in steam generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/001—Controlling by flue gas dampers
    • 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
    • F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles

Definitions

  • the invention relates to a device for setting a predetermined outlet temperature of the flue gas leaving a steam generator which remains constant within a range, with the features of the preamble of patent claim 1.
  • the steam generators which are fired with fossil fuels, are operated in such a way that the flue gas temperature behind the last heating surface, which is an economizer, decreases with decreasing output of the steam generator.
  • the flue gas temperature In the event that a denitrification system for reducing the NO x content in the flue gas is provided in the flue gas system between the economizer and an air preheater heated by the flue gas, the flue gas temperature must be adjusted to the working range of this system. This means that the flue gas temperature must not fall below a certain level before the flue gas enters the denitrification plant.
  • the invention has for its object to provide a device through which the outlet temperature of the flue gas can be kept above a permissible value regardless of the load of the steam generator by simple means.
  • the last heating surface is completely or only partially exposed to flue gas. This reduces the heat dissipation of the flue gas and raises the outlet temperature while setting it to the desired value.
  • the partition prevents temperature imbalances in the flue gas by individually closing or opening the flaps when the load drops or rises.
  • the load range that can be influenced is expanded if several partition walls are provided. Since the partition or partitions are located transversely to the heating surfaces, water and steam-side temperature imbalances and uneven heat absorption within the heating surface are avoided. Finally, due to the vertical arrangement, the partition is insensitive to contamination and can therefore also be used in coal-fired steam generators.
  • the steam generator shown in Fig. 1 is designed as a draw-in boiler and contains an only indicated combustion chamber 1, which is followed by a flue gas duct 2.
  • Combustion chamber 1 and flue gas flue 2 are formed by gas-tight welded tube walls.
  • At the outlet end of the flue gas duct 2 there is a flue gas duct 3 which is connected to an air preheater 5 via a flue gas line 4.
  • the flue gas line 4 is led behind the air preheater 5 to a chimney, not shown.
  • heating surfaces 6, 7, 8 are arranged, which are connected as superheaters and as economizers. As is shown in more detail for the last heating surface 8 switched as an economizer in the flow direction of the flue gas, the heating surfaces 6, 7, 8 each consist of one or more tube bundles, the tubes of which are guided in several turns across the flue gas duct 2.
  • a denitrification plant 9 is arranged in the flue gas line 4 before entering the air preheater 5, in which the nitrogen oxides contained in the flue gas are reduced by adding ammonia and with the aid of catalysts.
  • the denitrification plant can only work in a certain temperature range of around 320 to 380 degrees Celsius. It must therefore be ensured that this temperature range is maintained irrespective of the respective load range of the steam generator.
  • each partition 10 is arranged vertically in the area of the flue gas outlet in the flue gas duct 2.
  • Each partition 10 extends transversely to the heating surfaces 6, 7, 8 and extends to the ceiling of the flue gas duct 2.
  • the last heating surface 8 can be formed from smooth tubes or from finned tubes. If smooth pipes are used, each partition wall 10 penetrates the last heating surface 8. In this way, a cross-flow through the heating surface 8 is avoided.
  • the partition 10 can only partially penetrate the heating surface 8 or extend close to the penultimate heating surface 7. If the last heating surface 8 is made up of finned tubes which, by themselves, produce a vertical flow, the partition 10 begins immediately behind the last heating surface 8.
  • the partition 10 is provided behind the last heating surface 8 with rotatable flaps 11.
  • the outlet-side part of the flue gas flue 2 is thus divided into sections which are flowed through or not flowed through depending on the position of the flaps 11.
  • the section adjacent to the flue gas duct 3 and separated by the corresponding partition 10 has such a cross section that the flue gas flows in it at minimum load at approximately the same flow rate as at full load over the entire cross section of the flue gas duct 2.
  • a plurality of partitions 10 When the load is reduced, a plurality of partitions 10 first closes the partition which is furthest away from the flue gas duct 3, specifically with the flap 11, which is also the most distant from the heating surface 8. Thus, the separated section is only partially or no longer flowed through by the flue gas, so that the last heating surface 8 is partially removed from the flue gas.
  • the flaps 11 are closed or opened when the load changes. Individual flaps 11 can also be closed, starting with the flap 11 that is furthest from the last heating surface 8. This type of flap actuation can also be used in the arrangement of a plurality of partition walls 10. In the open state, the flaps represent 11 flow control arms.
  • the steam generator shown in FIG. 2 is designed as a multi-pass boiler, in which the last flue gas train 2 is connected to the combustion chamber 1 or another flue gas train via a transverse train 12.
  • the last flue gas flue 2 flows through from top to bottom and ends in a funnel shape.
  • Two funnels 13 are formed, the partition wall 10 running into the apex between the funnels 13. If several partition walls 10 are provided, a further funnel can be arranged for each additional partition wall. It is also possible to have the partition wall 10 extend into the funnel 13.
  • the rotatable flaps 11 are designed according to FIG. 1 as multi-leaf flaps. These louvre flaps can also be replaced by a swing wing flap.
  • the partition 10 of the boiler shown in FIG. 2 is provided with such a swivel wing flap. Instead of this swivel wing flap, louvre flaps can also be used here.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chimneys And Flues (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Control Of Combustion (AREA)
  • Treating Waste Gases (AREA)

Abstract

1. Device for the adjustment of a preset exit temperature, which remains constant within a range, of the flue gas leaving a steam generator through a flue gas channel (3), wherein the steam generator displays a flue gas duct (2) connected with the flue gas channel (3), heating surfaces (6, 7, 8) are arranged in the flue gas duct (2) transversely to the flow direction of the flue gas, rotatable flaps (11) are arranged in flow direction of the flue gas behind the last heating surface (8), the flue gas channel (3) is connected with a denitrification plant (9) and an air preheater (5) connected downstream thereof on the flue gas side, characterised thereby, that the flue gas duct (2) is divided into sections at the exit end by at least one (10) arranged in flow direction of the flue gas behind the last heating surface (8) and transversely thereto, that this partition (10) is provided with the rotatable flaps (11) and that the partition (10) is arranged in the flue gas duct (2) at such a spacing from the transition into the flue gas channel (3) that about the same speed of flow of the flue gas prevails in that portion of the flue gas duct (2), which is separated off from the flue gas channel (3), at minimum load of the steam generator as over the entire cross-section of the undivided flue gas duct (2) at full load.

Description

Die Erfindung betrifft eine Vorrichtung zur Einstellung einer innerhalb eines Bereiches gleichbleibenden vorgegebenen Austrittstemperatur des einen Dampferzeuger verlassenden Rauchgases mit den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a device for setting a predetermined outlet temperature of the flue gas leaving a steam generator which remains constant within a range, with the features of the preamble of patent claim 1.

Die mit fossilen Brennstoffen befeuerten Dampferzeuger sind so betrieben, daß die Rauchgastemperatur hinter der letzten Heizfläche, die einen Economiser darstellt, mit sinkender Leistung des Dampferzeugers abnimmt. Für den Fall, daß im Rauchgassystem zwischen dem Economiser und einem vom Rauchgas beheizten Luftvorwärmer eine Entstickungsanlage zur Reduktion des NOx-Gehaltes im Rauchgas vorgesehen ist, so ist die Rauchgastemperatur auf den Arbeitsbereich dieser Anlage abzustellen. Das bedeutet, daß eine bestimmte Rauchgastemperatur vor dem Eintritt des Rauchgases in die Entstickungsanlage nicht unterschritten werden darf.The steam generators, which are fired with fossil fuels, are operated in such a way that the flue gas temperature behind the last heating surface, which is an economizer, decreases with decreasing output of the steam generator. In the event that a denitrification system for reducing the NO x content in the flue gas is provided in the flue gas system between the economizer and an air preheater heated by the flue gas, the flue gas temperature must be adjusted to the working range of this system. This means that the flue gas temperature must not fall below a certain level before the flue gas enters the denitrification plant.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zu schaffen, durch die mit einfachen Mitteln die Austrittstemperatur des Rauchgases unabhängig von der Last des Dampferzeugers oberhalb eines zulässigen Wertes gehalten werden kann.The invention has for its object to provide a device through which the outlet temperature of the flue gas can be kept above a permissible value regardless of the load of the steam generator by simple means.

Diese Aufgabe wird bei einer gattungsgemäßen Vorrichtung durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved in a generic device by the characterizing features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

Je nachdem, ob die Klappen der Trennwand geöffnet oder geschlossen sind, wird die letzte Heizfläche vollständig oder nur teilweise mit Rauchgas beaufschlagt. Dadurch wird der Wärmeabbau des Rauchgases reduziert und die Austrittstemperatur angehoben und dabei auf den gewünschten Wert eingestellt. Die Trennwand verhindert Temperaturschieflagen im Rauchgas, indem bei sinkender oder steigender Last die Klappen einzeln geschlossen oder geöffnet werden. Der beeinflußbare Lastbereich wird erweitert, wenn mehrere Trennwände vorgesehen sind. Da die Trennwand oder die Trennwände quer zu den Heizflächen liegen, werden wasser- und dampfseitige Temperaturschieflagen und ungleiche Wärmeaufnahmen innerhalb der Heizfläche vermieden. Schließlich ist die Trennwand durch die vertikale Anordnung unempfindlich gegen Verschmutzung und kann daher auch in kohlegefeuerten Dampferzeugern eingesetzt werden.Depending on whether the flaps of the partition are open or closed, the last heating surface is completely or only partially exposed to flue gas. This reduces the heat dissipation of the flue gas and raises the outlet temperature while setting it to the desired value. The partition prevents temperature imbalances in the flue gas by individually closing or opening the flaps when the load drops or rises. The load range that can be influenced is expanded if several partition walls are provided. Since the partition or partitions are located transversely to the heating surfaces, water and steam-side temperature imbalances and uneven heat absorption within the heating surface are avoided. Finally, due to the vertical arrangement, the partition is insensitive to contamination and can therefore also be used in coal-fired steam generators.

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher erläutert. Es zeigen:

  • Fig. 1 den Längsschnitt durch einen Einzugkessel mit einer Vorrichtung gemäß der Erfindung und
  • Fig. 2 den Längsschnitt durch einen Mehrzugkessel mit einer Vorrichtung gemäß der Erfindung.
Two embodiments of the invention are shown in the drawing and are explained in more detail below. Show it:
  • Fig. 1 shows the longitudinal section through a feed boiler with a device according to the invention and
  • Fig. 2 shows the longitudinal section through a multi-pass boiler with a device according to the invention.

Der in Fig. 1 dargestellte Dampferzeuger ist als Einzugkessel ausgebildet und enthält einen nur angedeuteten Feuerraum 1, an den sich ein Rauchgaszug 2 anschließt. Feuerraum 1 und Rauchgaszug 2 sind durch gasdicht verschweißte Rohrwände gebildet. Am austrittsseitigen Ende des Rauchgaszuges 2 schließt sich ein Rauchgaskanal 3 an, der über eine Rauchgasleitung 4 mit einem Luftvorwärmer 5 verbunden ist. Die Rauchgasleitung 4 ist hinter dem Luftvorwärmer 5 zu einem nicht dargestellten Kamin geführt.The steam generator shown in Fig. 1 is designed as a draw-in boiler and contains an only indicated combustion chamber 1, which is followed by a flue gas duct 2. Combustion chamber 1 and flue gas flue 2 are formed by gas-tight welded tube walls. At the outlet end of the flue gas duct 2 there is a flue gas duct 3 which is connected to an air preheater 5 via a flue gas line 4. The flue gas line 4 is led behind the air preheater 5 to a chimney, not shown.

In dem freien Querschnitt des Rauchgaszuges 2 sind Heizflächen 6, 7, 8 angeordnet, die als Überhitzer und als Economiser geschaltet sind. Wie für die in Strömungsrichtung des Rauchgases letzte, als Economiser geschaltete Heizfläche 8 näher dargestellt ist, bestehen die Heizflächen 6, 7, 8 aus jeweils einem oder mehreren Rohrbündeln, deren Rohre in mehreren Windungen quer durch den Rauchgaszug 2 geführt sind.In the free cross section of the flue gas flue 2, heating surfaces 6, 7, 8 are arranged, which are connected as superheaters and as economizers. As is shown in more detail for the last heating surface 8 switched as an economizer in the flow direction of the flue gas, the heating surfaces 6, 7, 8 each consist of one or more tube bundles, the tubes of which are guided in several turns across the flue gas duct 2.

In der Rauchgasleitung 4 ist vor dem Eintritt in den Luftvorwärmer 5 eine Entstickungsanlage 9 angeordnet, in der durch Zusatz von Ammoniak und unter Mitwirkung von Katalysatoren die im Rauchgas enthaltenen Stickoxide reduziert werden. Die Entstickungsanlage kann nur in einem bestimmten Temperaturbereich von etwa 320 bis 380 Grad C arbeiten. Es muß daher dafür gesorgt werden, daß dieser Temperaturbereich unabhängig von dem jeweiligen Lastbereich des Dampferzeugers eingehalten wird.A denitrification plant 9 is arranged in the flue gas line 4 before entering the air preheater 5, in which the nitrogen oxides contained in the flue gas are reduced by adding ammonia and with the aid of catalysts. The denitrification plant can only work in a certain temperature range of around 320 to 380 degrees Celsius. It must therefore be ensured that this temperature range is maintained irrespective of the respective load range of the steam generator.

Im Bereich des Rauchgasaustrittes sind in dem Rauchgaszug 2 im dargestellten Fall zwei Trennwände 10 senkrecht angeordnet. Jede Trennwand 10 verläuft quer zu den Heizflächen 6, 7, 8 und reicht bis zur Decke des Rauchgaszuges 2. Die letzte Heizfläche 8 kann aus Glattrohren oder aus Rippenrohren gebildet sein. Sind Glattrohre verwendet, so durchdringt jede Trennwand 10 die letzte Heizfläche 8. Auf diese Weise wird eine Querdurchströmung der Heizfläche 8 vermieden. Je nach der sich aus der Auslegung des Rauchgaszuges 2 ergebenden Gasgeschwindigkeit, kann die Trennwand 10 die Heizfläche 8 auch nur teilweise durchdringen oder bis nahe an die vorletzte Heizfläche 7 reichen. Ist die letzte Heizfläche 8 aus Rippenrohren aufgebaut, die von sich aus eine Senkrechtdurchströmung bewirken, so beginnt die Trennwand 10 unmittelbar hinter der letzten Heizfläche 8.In the illustrated case, two partition walls 10 are arranged vertically in the area of the flue gas outlet in the flue gas duct 2. Each partition 10 extends transversely to the heating surfaces 6, 7, 8 and extends to the ceiling of the flue gas duct 2. The last heating surface 8 can be formed from smooth tubes or from finned tubes. If smooth pipes are used, each partition wall 10 penetrates the last heating surface 8. In this way, a cross-flow through the heating surface 8 is avoided. Depending on the gas velocity resulting from the design of the flue gas flue 2, the partition 10 can only partially penetrate the heating surface 8 or extend close to the penultimate heating surface 7. If the last heating surface 8 is made up of finned tubes which, by themselves, produce a vertical flow, the partition 10 begins immediately behind the last heating surface 8.

Die Trennwand 10 ist hinter der letzten Heizfläche 8 mit drehbaren Klappen 11 versehen. Der austrittsseitige Teil des Rauchgaszuges 2 ist damit in Abschnitte aufgeteilt, die je nach der Stellung der Klappen 11 durchströmt oder nicht durchströmt sind. Dabei hat der dem Rauchgaskanal 3 benachbarte, durch die entsprechende Trennwand 10 abgetrennte Abschnitt einen solchen Querschnitt, daß in ihm bei Minimallast das Rauchgas etwa mit der gleichen Strömungsgeschwindigkeit strömt wie bei Vollast über den gesamten Querschnitt des Rauchgaszuges 2.The partition 10 is provided behind the last heating surface 8 with rotatable flaps 11. The outlet-side part of the flue gas flue 2 is thus divided into sections which are flowed through or not flowed through depending on the position of the flaps 11. The section adjacent to the flue gas duct 3 and separated by the corresponding partition 10 has such a cross section that the flue gas flows in it at minimum load at approximately the same flow rate as at full load over the entire cross section of the flue gas duct 2.

Bei einer Verringerung der Last wird bei der Anordnung mehrerer Trennwände 10 zuerst die Trennwand geschlossen, die von dem Rauchgaskanal 3 am weitesten entfernt liegt, und zwar mit jeweils der Klappe 11, die von der Heizfläche 8 ebenfalls am weitesten entfernt angeordnet ist. Damit ist der abgetrennte Abschnitt nur noch teilweise oder nicht mehr von dem Rauchgas durchströmt, so daß die letzte Heizfläche 8 teilweise aus der Rauchgasbeaufschlagung herausgenommen ist.When the load is reduced, a plurality of partitions 10 first closes the partition which is furthest away from the flue gas duct 3, specifically with the flap 11, which is also the most distant from the heating surface 8. Thus, the separated section is only partially or no longer flowed through by the flue gas, so that the last heating surface 8 is partially removed from the flue gas.

Damit wird über diese Heizfläche 8 dem Rauchgas weniger Wärme entzogen und die Rauchgastemperatur beim Eintritt in den Rauchgaskanal 3 angehoben. Ist nur eine Trennwand 10 vorhanden, so werden die Klappen 11 bei einer Laständerung geschlossen bzw. geöffnet. Es können auch einzelne Klappen 11 beginnend mit der von der letzten Heizfläche 8 entferntesten Klappe 11 geschlossen werden. Diese Art der Klappenbetätigung kann auch bei der Anordnung von mehreren Trennwänden 10 angewendet werden. Im geöffneten Zustand stellen die Klappen 11 Strömungslenker dar.This means that less heat is removed from the flue gas via this heating surface 8 and the flue gas temperature is raised when it enters the flue gas duct 3. If there is only one partition 10, the flaps 11 are closed or opened when the load changes. Individual flaps 11 can also be closed, starting with the flap 11 that is furthest from the last heating surface 8. This type of flap actuation can also be used in the arrangement of a plurality of partition walls 10. In the open state, the flaps represent 11 flow control arms.

Der in Fig. 2 dargestellte Dampferzeuger ist als Mehrzugkessel ausgebildet, bei dem der letzte Rauchgaszug 2 über einen Querzug 12 mit dem Feuerraum 1 oder einem anderen Rauchgaszug verbunden ist. Der letzte Rauchgaszug 2 ist von oben nach unten durchströmt und endet trichterförmig. Es werden zwei Trichter 13 gebildet, wobei die Trennwand 10 in den Scheitelpunkt zwischen den Trichtern 13 einläuft. Sind mehrere Trennwände 10 vorgesehen, so kann für jede weitere Trennwand ein weiterer Trichter angeordnet werden. Es ist auch möglich, die Trennwand 10 in den Trichter 13 hineinreichen zu lassen.The steam generator shown in FIG. 2 is designed as a multi-pass boiler, in which the last flue gas train 2 is connected to the combustion chamber 1 or another flue gas train via a transverse train 12. The last flue gas flue 2 flows through from top to bottom and ends in a funnel shape. Two funnels 13 are formed, the partition wall 10 running into the apex between the funnels 13. If several partition walls 10 are provided, a further funnel can be arranged for each additional partition wall. It is also possible to have the partition wall 10 extend into the funnel 13.

Die drehbaren Klappen 11 sind gemäß Fig. 1 als Jalousieklappen ausgebildet. Diese Jalousieklappen können auch durch eine Schwenkflügelklappe ersetzt werden. Mit einer solchen Schwenkflügelklappe ist die Trennwand 10 des in Fig. 2 dargestellten Kessels versehen. Anstatt dieser Schwenkflügelklappe können an dieser Stelle auch Jalousieklappen eingesetzt werden.The rotatable flaps 11 are designed according to FIG. 1 as multi-leaf flaps. These louvre flaps can also be replaced by a swing wing flap. The partition 10 of the boiler shown in FIG. 2 is provided with such a swivel wing flap. Instead of this swivel wing flap, louvre flaps can also be used here.

Claims (5)

1. Vorrichtung zur Einstellung einer innerhalb eines Bereiches gleichbleibenden vorgegebenen Austrittstemperatur des einen Dampferzeuger durch einen Rauchgaskanal (3) verlassenden Rauchgases, wobei der Dampferzeuger einen mit dem Rauchgaskanal (3) verbundenen Rauchgaszug (2) aufweist, in dem quer zur Strömungsrichtung des Rauchgases Heizflächen (6, 7, 8) angeordnet sind, dadurch gekennzeichnet, daß an dem austrittsseitigen Ende des Rauchgaszuges (2) in Strömungsrichtung des Rauchgases hinter der letzten Heizfläche (8) mindestens eine Trennwand (10) quer zu dieser Heizfläche (8) angeordnet ist und daß die Trennwand (10) mit einer oder mehreren drehbaren Klappen (11) versehen ist.1. Device for setting a predetermined outlet temperature of a steam generator leaving a steam generator through a flue gas duct (3) which remains constant within a range, wherein the steam generator has a flue gas duct (2) connected to the flue gas duct (3), in which heating surfaces (transversely to the flow direction of the flue gas) 6, 7, 8) are arranged, characterized in that at the outlet end of the flue gas flue (2) in the flow direction of the flue gas behind the last heating surface (8) at least one partition (10) is arranged transversely to this heating surface (8) and that the partition (10) is provided with one or more rotatable flaps (11). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Trennwand (10) in dem Rauchgaszug (2) in einem solchen Abstand von dem Übergang in den Rauchgaskanal (3) angeordnet ist, daß in dem zum Rauchgaskanal (3) hin abgetrennten Abschnitt des Rauchgaszuges (2) bei Minimallast des Dampferzeugers etwa die gleiche Strömungsgeschwindigkeit des Rauchgases herrscht wie bei Vollast über den gesamten Querschnitt des ungeteilten Rauchgaszuges (2).2. Device according to claim 1, characterized in that the partition (10) in the flue gas flue (2) is arranged at such a distance from the transition into the flue gas duct (3) that in the section of the flue gas duct (3) separated out Flue gas flue (2) at minimum load of the steam generator there is approximately the same flow velocity of the flue gas as at full load over the entire cross section of the undivided flue gas flue (2). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Trennwand (10) mindestens einen Teil der letzten Heizfläche (8) quer durchdringt.3. Apparatus according to claim 1 or 2, characterized in that the partition (10) penetrates at least part of the last heating surface (8) transversely. 4. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mehrere parallel angeordnete Trennwände (10) vorgesehen sind.4. The device according to one or more of claims 1 to 3, characterized in that a plurality of partition walls (10) arranged in parallel are provided. 5. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 4, bei der der Rauchgaszug (2) von oben nach unten durchströmt und am unteren Ende trichterförmig begrenzt ist, dadurch gekennzeichnet, daß mehrere Trichter (13) vorgesehen sind und daß jede Trennwand (10) in den Scheitelpunkt zwischen zwei benachbarten Trichtern (13) ausläuft.5. The device according to one or more of claims 1 to 4, in which the flue gas flue (2) flows from top to bottom and is funnel-shaped at the lower end, characterized in that several funnels (13) are provided and that each partition (10 ) in the apex between two adjacent funnels (13).
EP86115200A 1986-02-28 1986-11-03 Preset flue gas temperature-adjusting device Expired - Lifetime EP0233998B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115200T ATE51063T1 (en) 1986-02-28 1986-11-03 DEVICE FOR ADJUSTMENT OF DEFAULT FLUE GAS TEMPERATURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863606463 DE3606463A1 (en) 1986-02-28 1986-02-28 DEVICE FOR SETTING A PRESET SMOKE TEMPERATURE
DE3606463 1986-02-28

Publications (2)

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EP0233998A1 true EP0233998A1 (en) 1987-09-02
EP0233998B1 EP0233998B1 (en) 1990-03-14

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EP86115200A Expired - Lifetime EP0233998B1 (en) 1986-02-28 1986-11-03 Preset flue gas temperature-adjusting device

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EP (1) EP0233998B1 (en)
JP (1) JPH0781696B2 (en)
AT (1) ATE51063T1 (en)
DE (2) DE3606463A1 (en)

Cited By (5)

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EP0595009A1 (en) * 1992-09-30 1994-05-04 Siemens Aktiengesellschaft Method of operating a power plant and power plant working according to this method
FR2699264A1 (en) * 1992-12-15 1994-06-17 Babcock Entreprise Heat exchanger mounted with anti-erosion baffles - comprises thermal energy transfer to fluid circulating in tube bundle whose bends are protected by anti-erosion device
CN103017137A (en) * 2012-12-27 2013-04-03 青岛胜利锅炉有限公司 Low-temperature corrosion resisting structure of boiler
CH706152A1 (en) * 2012-02-29 2013-08-30 Alstom Technology Ltd Gas turbine plant with a waste heat boiler arrangement with exhaust gas recirculation.
CN109404948A (en) * 2018-10-31 2019-03-01 上海新业锅炉高科技有限公司 A kind of flue gas flow direction device changing heating surface

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402671B (en) * 1993-06-17 1997-07-25 Vaillant Gmbh HEATING DEVICE HEATING DEVICE

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DE1162383B (en) * 1953-05-02 1964-02-06 Steinmueller Gmbh L & C Steam generator heated by highly aggressive exhaust gases, the evaporator heating surface of which is protected from dew point corrosion by a correspondingly high operating pressure
GB756067A (en) * 1953-12-02 1956-08-29 Foster Wheeler Ltd Improvements in and relating to vapour generators
FR1317026A (en) * 1962-03-08 1963-02-01 Steinmueller Gmbh L & C Method and device for improving the thermal economy of steam engines
GB1544169A (en) * 1976-07-27 1979-04-11 Hitachi Shipbuilding Eng Co Boiler apparatus containing a denitrator
GB1577202A (en) * 1977-04-01 1980-10-22 Smith F Heat exchange tube assemblies and economizers incorporating them
GB2082084A (en) * 1980-08-20 1982-03-03 Westinghouse Electric Corp Apparatus for recovering heat energy and removing nox in combined cycle plants

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595009A1 (en) * 1992-09-30 1994-05-04 Siemens Aktiengesellschaft Method of operating a power plant and power plant working according to this method
FR2699264A1 (en) * 1992-12-15 1994-06-17 Babcock Entreprise Heat exchanger mounted with anti-erosion baffles - comprises thermal energy transfer to fluid circulating in tube bundle whose bends are protected by anti-erosion device
CH706152A1 (en) * 2012-02-29 2013-08-30 Alstom Technology Ltd Gas turbine plant with a waste heat boiler arrangement with exhaust gas recirculation.
WO2013127924A3 (en) * 2012-02-29 2014-12-11 Alstom Technology Ltd Gas turbine plant having exhaust gas recirculation
CN104302892A (en) * 2012-02-29 2015-01-21 阿尔斯通技术有限公司 Gas turbine plant having exhaust gas recirculation
CN104302892B (en) * 2012-02-29 2016-08-24 通用电器技术有限公司 There is the gas turbine unit of exhaust gas recirculatioon
CN103017137A (en) * 2012-12-27 2013-04-03 青岛胜利锅炉有限公司 Low-temperature corrosion resisting structure of boiler
CN109404948A (en) * 2018-10-31 2019-03-01 上海新业锅炉高科技有限公司 A kind of flue gas flow direction device changing heating surface

Also Published As

Publication number Publication date
ATE51063T1 (en) 1990-03-15
DE3606463A1 (en) 1987-09-03
DE3669579D1 (en) 1990-04-19
EP0233998B1 (en) 1990-03-14
JPS62206316A (en) 1987-09-10
JPH0781696B2 (en) 1995-09-06

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