EP1219892B1 - Heat recovery boiler for cooling hot synthesis gas - Google Patents

Heat recovery boiler for cooling hot synthesis gas Download PDF

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Publication number
EP1219892B1
EP1219892B1 EP01128682A EP01128682A EP1219892B1 EP 1219892 B1 EP1219892 B1 EP 1219892B1 EP 01128682 A EP01128682 A EP 01128682A EP 01128682 A EP01128682 A EP 01128682A EP 1219892 B1 EP1219892 B1 EP 1219892B1
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Prior art keywords
superheater
tubes
chamber
water
steam
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EP01128682A
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German (de)
French (fr)
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EP1219892A1 (en
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Peter Brücher
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Borsig GmbH
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Borsig GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1884—Hot gas heating tube boilers with one or more heating tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1838—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines the hot gas being under a high pressure, e.g. in chemical installations

Abstract

A waste heat boiler for cooling hot syngas in heat exchange with water under boiling pressure, consists of an outer pressure shell (1) having a water space (2) filled with boiling water up to a predetermined fluid level (4) and a steam space (3) above it. In the water space (2), heat exchanger tubes (5) are arranged, through which the syngas to be cooled flows. Downstream from the heat exchanger tubes (5) is a superheater for superheating the saturated steam generated by the boiling water. This superheater is positioned at least partially in the steam space (3) above the fluid level (4) and has straight tubes (7), through which the syngas coming from the heat exchanger tubes (5) flows and around which the steam exiting from the water space (2) circulates.

Description

Die Erfindung betrifft einen Abhitzekessel zum Kühlen von heißem Synthesegas mit den Merkmalen des Oberbegriffes des Anspruches 1.The invention relates to a waste heat boiler for cooling hot synthesis gas having the features of the preamble of claim 1.

Heiße Synthesegase wie sie z. B. in Öl- oder Rückstandsvergasungsanlagen erzeugt werden, werden in einem dem Vergasungsreaktor nachgeschalteten Synthesegas-Abhitzekessel abgekühlt. Die in dem Synthesegas enthaltene Wärmeenergie wird rückgewonnen, wobei Hochdruck-Sattdampf erzeugt wird. Zur weiteren sinnvollen Nutzung ist dieser Sattdampf in der Regel zu überhitzen.Hot synthesis gases like z. B. in oil or residue gasification plants are cooled in a gasification reactor downstream of the synthesis gas waste heat boiler. The heat energy contained in the synthesis gas is recovered, producing high-pressure saturated steam. For further meaningful use of this saturated steam is usually overheat.

Synthesegas-Abhitzekessel zur Hochdruck-Sattdampferzeugung bestehen zum Beispiel aus spiralförmig geformten Rohrschlangen oder einem Bündel aus geraden oder U-förmig gebogenen Rohren, die die Wärmeaustauschfläche bilden. Das heiße Synthesegas durchströmt diese Rohrschlangen oder Rohrbündel und gibt seine Wärme an das die Rohrschlange oder das Rohrbündel innerhalb eines Druckmantels umgebende und unter Siededruck stehende Wasser ab.Synthetic gas waste heat boilers for high-pressure saturated steam generation consist, for example, of spiral-shaped pipe coils or a bundle of straight or U-shaped bent tubes which form the heat exchange surface. The hot synthesis gas flows through these coils or tube bundles and gives off its heat to the water surrounding the tube coil or the tube bundle within a pressure jacket and under boiling pressure.

Der Sattdampf wird in einem separaten, dem Abhitzekessel nachgeschalteten Überhitzer überhitzt. Es sind auch in Synthesegas-Abhitzekessel integrierte Dampfüberhitzer bekannt, die aus spiralförmig geformten Rohrschlangen bestehen, die den Abhitzekessel-Rohrschlangen nachgeschaltet sind und bei denen das Synthesegas in gleicher Weise wie bei dem Abhitzekessel die Rohrschlange durchströmt. Die Überhitzer-Rohrschlangen weisen in der Regel einen kleineren Rohrdurchmesser als die Abhitzekessel-Rohrschlangen auf. Der Sattdampf wird um die Überhitzerrohrschlange geführt und dabei überhitzt. Diese Bauart weist die folgenden gravierenden Nachteile auf: Sie ist spezifisch teuer und aufwendig; sie ist nur mit erheblichem Aufwand zu inspizieren und zu reparieren. Das die Überhitzerrohrschlange durchströmende $ynthesegas kann Ablagerungen innerhalb des Rohrschlangenrohres hervorrufen, die zu Verstopfung und damit Unwirksamkeitwerden des Überhitzers führen. Aufgrund des relativ kleinen Rohrdurchmessers sind diese Verstopfungen kaum oder nur mit großem Aufwand zu beheben.The saturated steam is overheated in a separate superheater downstream of the waste heat boiler. There are also known in syngas waste heat boiler integrated steam superheater known, which consist of spirally shaped coils, which are connected downstream of the waste heat boiler coils and in which the synthesis gas flows through the coil in the same manner as in the waste heat boiler. The superheater coils typically have a smaller pipe diameter than the waste heat boiler coils. The saturated steam is around the Superheater coil out and overheated. This design has the following serious disadvantages: it is specifically expensive and expensive; it is only with considerable effort to inspect and repair. The superheated coil flowing through the Hyannesegas can cause deposits within the coil tube leading to clogging and thus inefficiency of the superheater. Due to the relatively small pipe diameter, these blockages are difficult or only with great effort to fix.

Des Weiteren sind in Synthesegas-Abhitzekessel integrierte Rohrschlangen-Dampfüberhitzer bekannt (Chem.-Ing.-Techn. 56 (1984 Nr. 5, S. 356 - 360), bei denen das Synthesegas um die Rohrschlangenrohre und der zu überhitzende Sattdampf durch die Rohrschlangenrohre geführt wird. Auch für diesen integrierten Dampfüberhitzer gilt, dass er spezifisch teuer und aufwendig ist und nur mit erheblichem Aufwand zu inspizieren und zu reparieren ist. Darüber hinaus werden zumindest bei der Vergasung flüssiger Einsatzstoffe die Strömungskanäle zwischen der Rohrschlange durch Ablagerungen aus dem Synthesegas verstopft. Diese Ablagerungen können nicht entfernt werden und machen den Überhitzer nach einer gewissen Zeit unwirksamFurthermore, in co-generation heat-recovery boiler integrated coiled tube steam superheater known (Chem.-Ing.-Techn. 56 (1984 No. 5, pp 356-360)), in which the synthesis gas to the tube coil pipes and overheated to saturated steam through the tube coil tubes Also for this integrated steam superheater is that it is specifically expensive and expensive and can be inspected and repaired only with considerable effort.In addition, at least in the gasification of liquid feedstocks, the flow channels between the coil are clogged by deposits from the synthesis gas. These deposits can not be removed and make the superheater ineffective after a period of time

Gattungsgemäße Abhitzekessel oder Dampferzeuger sind aus den Dokumenten US-A-3 867 907, US-A-4 589 473, US-A-4 488 513 und US-A-3 915 224 bekannt. Sie bestehen aus einem Druckgefäß, das bis zu einem vorgegebenen Flüssigkeitsspiegel mit siedendem Wasser gefüllt ist und das im unteren Teil einen Wasserraum und im oberen Teil einen Dampfraum aufweist. Innerhalb des Druckgefäßes sind von Heißgas durchströmte Wärmetauscherrohre angeordnet, deren im Wasserraum liegende Rohrabschnitte als Verdampfer und deren im Dampfraum liegende Rohrabschnitte als Überhitzer wirken. Die Wärmetauscherrohre können als gerade, senkrecht ausgerichtete Rohre ausgebildet sein, deren Enden in jeweils einen Rohrboden eingesetzt sind. Dabei können die Wärmetauscherrohre auf ihrer gesamten Länge (US-A-4 589 473), oder es können nur die im Dampfraum liegenden Rohrabschnitte der Wärmetauscherrohre (US-A-3 867 907) von jeweils einem Führungsrohr umgeben sein. Der Ringspalt zwischen den Wärmetauscherrohren und den Führungsrohren ist von Sattdampf durchströmt, der aus dem Dampfraum austritt. Anstelle von geraden Rohren können auch spiral- oder serpentinenförmig gebogene Rohre eingesetzt werden (US-A-4 488 513, US-A-3 915 224). Oberhalb des Flüssigkeitsspiegels können Tropfenabscheider angeordnet sein (US-A-4 488 513).Generic waste heat boilers or steam generators are known from documents US-A-3 867 907, US-A-4 589 473, US-A-4 488 513 and US-A-3 915 224. They consist of a pressure vessel which is filled up to a predetermined liquid level with boiling water and which has a water space in the lower part and a vapor space in the upper part. Within the pressure vessel through which hot gas flowed through heat exchanger tubes are arranged, the pipe sections lying in the water space acting as an evaporator and their pipe sections lying in the vapor space as a superheater. The heat exchanger tubes may be formed as straight, vertically aligned tubes whose ends in each used a tube sheet. In this case, the heat exchanger tubes over their entire length (US-A-4 589 473), or it can only be located in the vapor space pipe sections of the heat exchanger tubes (US-A-3 867 907) surrounded by a respective guide tube. The annular gap between the heat exchanger tubes and the guide tubes is traversed by saturated steam emerging from the vapor space. Instead of straight tubes, spiral or serpentine curved tubes can also be used (US Pat. No. 4,488,513, US Pat. No. 3,915,224). Above the liquid level, droplet separators may be arranged (US Pat. No. 4,488,513).

Der Erfindung liegt die Aufgabe zugrunde, den Überhitzer so in den Abhitzekessel zu integrieren, dass eine einfache und kostengünstige Bauweise entsteht, bei der der Überhitzer relativ einfach zu inspizieren, zu reinigen und zu reparieren ist.The invention has for its object to integrate the superheater so in the waste heat boiler that a simple and inexpensive construction is created in which the superheater is relatively easy to inspect, clean and repair.

Die Aufgabe wird bei einem gattungsgemäßen Abhitzekessel erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.The object is achieved in a generic waste heat boiler according to the invention by the characterizing features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Die Erfindung und deren Vorteile seien nachfolgend an einem in der Zeichnung dargestellten Ausführungsbeispiel erläutert. Die Zeichnung zeigt schematisch den Längschnitt durch den oberen Teil eines Abhitzekessels zum Kühlen von Synthesegas.The invention and its advantages are explained below on an embodiment shown in the drawing. The drawing shows schematically the longitudinal section through the upper part of a waste heat boiler for cooling synthesis gas.

Der Abhitzekessel zum Kühlen von Synthesegas ist ein Wärmetauscher stehender Bauart. Es besteht aus einem Druckmantel 1, der einen Wasserraum 2 und einen darüber angeordneten Dampfraum 3 umschließt. Der Wasserraum 2 ist bis zu einem Flüssigkeitsspiegel 4 mit unter hohem Siededruck stehendem Wasser gefüllt. Zur Zuführung des als Wärmeaustauschmedium dienenden Wassers ist in dem unteren, nicht gezeigten Teil des Druckmantels 1 ein Zuführungsstutzen angebracht.The waste heat boiler for cooling synthesis gas is a stationary type heat exchanger. It consists of a pressure jacket 1, which encloses a water space 2 and a vapor space 3 arranged above it. The water space 2 is filled up to a liquid level 4 with standing under high boiling water. For supplying the serving as a heat exchange medium water, a supply nozzle is mounted in the lower, not shown part of the pressure jacket 1.

In dem Wasserraum 2 sind Wärmetauscherrohre 5 angeordnet, die von dem zu kühlenden Synthesegas durchströmt sind. Die Wärmetauscherrohre 5 sind als spiralförmig gebogene Rohrschlangen ausgebildet, die ein- oder mehrgängig sein können. Im Wärmetausch mit dem heißen Synthesegas verdampft das die Wärmetauscherrohre 5 umgebende Wasser teilweise und tritt als Sattdampf am Flüssigkeitsspiegel 4 in den Dampfraum 3 ein. Oberhalb des Flüssigkeitsspiegels 4 befindet sich in dem Dampfraum 3 ein Tropfenabscheider 6 zur Trocknung des Sattdampfes.In the water chamber 2 heat exchanger tubes 5 are arranged, which are flowed through by the synthesis gas to be cooled. The heat exchanger tubes 5 are formed as spirally curved coils, which can be single or multi-speed. In heat exchange with the hot synthesis gas, the water surrounding the heat exchanger tubes 5 partially evaporates and enters the vapor space 3 as saturated steam at the liquid level 4. Above the liquid level 4 is located in the vapor space 3, a mist eliminator 6 for drying the saturated steam.

Den als Verdampfer dienenden Wärmetauscherrohren 5 ist ein Überhitzer nachgeschaltet, der das Synthesegas weiter abkühlt und dabei den getrockneten Sattdampf überhitzt. Der Überhitzer ist zumindest teilweise innerhalb des Druckmantels 1 angeordnet und damit in den Abhitzekessel integriert. Der Überhitzer enthält ein vertikal ausgerichtetes Bündel aus geraden, in mehreren Reihen nebeneinander angeordneten Rohren 7, die in einen unteren Rohrboden 8 und einen oberen Rohrboden 9 dicht eingesetzt sind. Der untere Rohrboden 8 stellt den oberen Teil einer haubenförmige Gaseintrittskammer 10 dar, in die die Wärmetauscherrohre 5 einmünden.Serving as the evaporator heat exchanger tubes 5 is a superheater downstream, which further cools the synthesis gas and thereby overheated the dried saturated steam. The superheater is at least partially disposed within the pressure jacket 1 and thus integrated into the waste heat boiler. The superheater includes a vertically aligned bundle of straight, in several rows juxtaposed tubes 7, which are tightly inserted into a lower tube sheet 8 and an upper tube sheet 9. The lower tube sheet 8 represents the upper part a hood-shaped gas inlet chamber 10, in which the heat exchanger tubes 5 open.

Das Bündel der Rohre 7 des Überhitzers ist von einem Leitmantel 11 umschlossen, der bis nahe an den unteren Rohrboden 8 reicht. Dabei wird ein zwischen der Unterkante des Leitmantels 11 und dem unteren Rohrboden 8 ein Durchgang gebildet. Der Überhitzer ragt aus dem Druckmantel 1 heraus. An der Austrittsstelle des Überhitzers ist der Leitmantel 11 mit dem Druckmantel 1 dicht verbunden. Außerhalb des Druckmantels 1 ist an den Leitmantel 11 ein Austrittsstutzen 12 angeschlossen.The bundle of tubes 7 of the superheater is enclosed by a lead jacket 11 which extends to close to the lower tube sheet 8. In this case, a passage is formed between the lower edge of the Leitmantels 11 and the lower tube sheet 8. The superheater protrudes from the pressure jacket 1. At the exit point of the superheater, the lead jacket 11 is sealed to the pressure jacket 1. Outside the pressure jacket 1, an outlet nozzle 12 is connected to the Leitmantel 11.

Oberhalb des oberen Rohrbodens 9 befindet sich eine haubenförmige Gasaustrittskammer 13. Die Gasaustrittskammer 13 und der Leitmantel 11 sind jeweils mit einem Ringflansch 14, 15 versehen. Zwischen diese beiden Ringflansche 14, 15 ist der oberen Rohrboden 9 eingespannt.Above the upper tube plate 9 is a hood-shaped gas outlet chamber 13. The gas outlet chamber 13 and the guide jacket 11 are each provided with an annular flange 14, 15. Between these two annular flanges 14, 15 of the upper tube sheet 9 is clamped.

Innerhalb des Leitmantels 11 sind versetzt zueinander und quer zu den Rohren 7 Umlenkbleche 16 angeordnet, die als Schikanen für das die Rohre 7 umströmende Medium dienen.Within the guide casing 11 are offset from one another and transversely to the tubes 7 baffles 16 are arranged, which serve as baffles for the flow around the tubes 7 medium.

Der Überhitzer ist so innerhalb des Druckmantels 1 angeordnet, dass die Gaseintrittskammer 10 mit dem unteren Rohrboden 8 sich in dem Wasserraum 2 unterhalb des Flüssigkeitsspiegels 4 befindet. Die Gaseintrittskammer 10 ist damit von der Wasserseite gut gekühlt, wodurch Materialüberhitzungen vermieden werden.The superheater is arranged inside the pressure jacket 1 such that the gas inlet chamber 10 with the lower tube plate 8 is located in the water space 2 below the liquid level 4. The gas inlet chamber 10 is thus well cooled from the water side, whereby material overheating be avoided.

Zwischen der Reihen der Rohre 7 sind durch den unteren Rohrboden 8 Querbohrungen 17 hindurchgeführt, die zum Wasserraum 2 hin an beiden Enden offen sind. Die Querbohrungen 17 sind damit mit Wasser gefüllt, welches den unteren Rohrboden 8 kühlt.Between the rows of tubes 7 8 transverse bores 17 are passed through the lower tube sheet, which are open to the water chamber 2 at both ends. The transverse bores 17 are thus filled with water, which cools the lower tube sheet 8.

Ein Kragen 18 ist mit dem äußeren Rand des unteren Rohrbodens 8 dicht verbunden. Dieser Kragen 18 umgibt den unteren Teil des Leitmantels 11 unter Bildung eines Ringraumes 19. Die Oberkante des Kragens 18 reicht nach oben über den Flüssigkeitsspiegel 4 hinaus in den Dampfraum 3. Zwischen dem Kragen 18 und dem Druckmantel 1 erstreckt sich der Tropfenabscheider 6 quer durch den Dampfraum 3.A collar 18 is sealed to the outer edge of the lower tube sheet 8. This collar 18 surrounds the lower part of the guide casing 11 to form an annular space 19. The upper edge of the collar 18 extends upward above the liquid level 4 out into the vapor space 3. Between the collar 18 and the pressure jacket 1, the droplet 6 extends transversely through the Steam room 3.

Der beschriebene Abhitzekessel arbeitet auf folgende Weise. Das zu kühlende, heiße Synthesegas, zum Beispiel aus einem Vergasungsreaktor wird den Rohrschlangen der Wärmetauscherrohre 5 zugeführt, durchströmt diese Wärmetauscherrohre 5 und tritt in die Gaseintrittskammer 10 ein. Die Gaseintrittskammer 10 verteilt das Synthesegas auf die Rohre 7 des Überhitzers. Nach dem Durchströmen der Rohre 7 des Überhitzers gelangt das Synthesegas in die Gasaustrittskammer 10, von wo aus es abgeführt wird.The described waste heat boiler works in the following way. The hot synthesis gas to be cooled, for example, from a gasification reactor is fed to the coils of the heat exchanger tubes 5, flows through these heat exchanger tubes 5 and enters the gas inlet chamber 10. The gas inlet chamber 10 distributes the synthesis gas to the tubes 7 of the superheater. After flowing through the tubes 7 of the superheater, the synthesis gas enters the gas outlet chamber 10, from where it is discharged.

In den Druckmantel 1 des Abhitzekessels wird so viel unter hohen Druck stehendes Wasser eingespeist, dass der Flüssigkeitsspiegel 4 auf einer vorgegebenen Höhe eingehalten wird. Das in dem Wasserraum 2 vorhandene, die Wärmetauscherrohre 5 umgebende Wasser verdampft im Wärmetausch mit dem heißen Synthesegas teilweise und tritt als Sattdampf am Flüssigkeitsspiegel 4 in den Dampfraum 3 aus. Beim Durchtritt durch den Tropfenabscheider 6 wird der nasse Sattdampf getrocknet. Von hier strömt der getrockene Sattdampf in den Ringraum 19 zwischen dem Kragen 18 und dem Leitmantel 11 nach unten und tritt durch den Durchgang zwischen der Unterkante des Leitmantels 11 und dem unteren Rohrboden 8 in den von dem Leitmantel 11 umschlossenen Innenraum ein. An dieser Stelle beginnt die Überhitzung des Sattdampfes, indem der getrocknete Sattdampf unter häufiger Umlenkung an den Umlenkblechen 16 an den Rohren 7 des Überhitzers entlang zum Austrittsstutzen 12 geführt wird und dabei die Wärmeenergie des durch die Rohre 7 strömenden Synthesegases aufnimmt. Der überhitzte Dampf wird durch den Austrittsstutzen 12 abgeführt.In the pressure shell 1 of the waste heat boiler so much under high pressure water is fed, that the liquid level 4 is maintained at a predetermined height. The existing in the water chamber 2, the heat exchanger tubes 5 surrounding water evaporates in heat exchange with the hot synthesis gas partially and exits as saturated steam at the liquid level 4 in the vapor space 3. When passing through the droplet 6, the wet saturated steam is dried. From here, the dried saturated steam flows into the annular space 19 between the collar 18 and the Leitmantel 11 down and enters through the passage between the lower edge of the Leitmantels 11 and the lower tube sheet 8 in the space enclosed by the Leitmantel 11 interior. At this point, overheating of the saturated steam begins by the dried saturated steam is led with frequent reversal at the baffles 16 on the tubes 7 of the superheater along the outlet nozzle 12 and thereby the heat energy of receives through the tubes 7 flowing synthesis gas. The superheated steam is discharged through the outlet nozzle 12.

Der mit dem äußeren Rand des unteren Rohrbodens 8 dicht verbundene Kragen 18 verhindert eine Flutung des Überhitzers mit siedendem Wasser.The tightly connected to the outer edge of the lower tube sheet 8 collar 18 prevents flooding of the superheater with boiling water.

Der Umstand, dass das gesamte Unterteil des Überhitzers, bestehend aus Kragen 18, unterem Rohrboden 8 und Gaseintrittskammer 10 sowie die Wärmetauscherrohren 5 in das siedende Wasser im Wasserraum 2 eintauchen, bewirkt eine sehr effektive und sichere Kühlung dieser durch das heiße Synthesegas berührten Teile.The fact that the entire lower part of the superheater, consisting of collar 18, lower tube sheet 8 and gas inlet chamber 10 and the heat exchanger tubes 5 dive into the boiling water in the water space 2, causes a very effective and safe cooling of these touched by the hot synthesis gas parts.

Die Bauart des beschriebenen Abhitzekessels mit integriertem Überhiter ist konzeptionell einfach aufgebaut und kostengünstig herzustellen. Das gesamte Überhitzer-Rohrbündel ist als Ganzes aus dem Abhitzekessel ausbaubar, leicht zu inspizieren, zu reinigen und zu reparieren. Die Innenseite der geraden Rohre 7 des Überhitzers ist mechanisch leicht von Ablagerungen zu reinigen. Der Überhitzer kann dazu in dem Synthesegas-Abhitzekessel eingebaut bleiben. Lediglich die Gasaustrittskammer 13 ist zu entfernen, wodurch die Überhitzerrohre 7 von oben zugänglich werden.The design of the described waste heat boiler with integrated Überhiter is conceptually simple and inexpensive to manufacture. The entire superheater tube bundle is removable as a whole from the waste heat boiler, easy to inspect, clean and repair. The inside of the straight tubes 7 of the superheater is mechanically easy to clean from deposits. The superheater can remain installed in the syngas waste heat boiler. Only the gas outlet chamber 13 is to be removed, whereby the superheater tubes 7 are accessible from above.

Claims (5)

  1. Waste heat boiler for cooling hot synthesis gas and heat exchange with water under boiling pressure, consisting of an outer pressure jacket (1) which has a water chamber (2) filled up to a predetermined liquid level (4) with the boiling water and a steam chamber (3) above the water chamber, of heat exchange tubes (5) which are arranged in the water chamber (2) and flowed through by the synthesis gas to be cooled, and of a superheater with straight tubes (7) for superheating the saturated steam arising from the boiling water, wherein the superheater is connected downstream of the heat exchange tubes (5) and arranged within the pressure jacket (1) and at least partly in the steam chamber (3) above the liquid level (4), wherein the tubes (7) of the superheater are flowed through by the hot synthesis gas and flowed around by the steam exiting from the water chamber (2), characterised in that the tubes (7) of the superheater are tightly inserted into a lower tube base (8) and an upper tube base (9) and surrounded by a guide casing (11), that the lower tube base (8) upwardly bounds a gas entry chamber (10) into which the heat exchange tubes (5) open and that the lower tube base (8) together with the gas entry chamber (10) are disposed in the water chamber (2) below the liquid level (4).
  2. Waste heat boiler according to claim 1, characterised in that the upper part of the superheater projects out of the pressure jacket (1) and that the guide casing (11) is tightly connected with the pressure jacket (1) at the passage point of the superheater.
  3. Waste heat boiler according to claim 1 of 2, characterised in that the guide casing (11) extends to the vicinity of the lower tube base (8), that the lower tube base (8) is connected with a collar (18) which surrounds the guide casing (11) at a radial spacing on a part length of the superheater with formation of an annular chamber (19) and that the collar (18) projects into the steam chamber (3).
  4. Waste heat boiler according to claim 3, characterised in that a drop separator (6) extends between the collar (18) and into the pressure jacket (1) transversely to the steam chamber (3).
  5. Waste heat boiler according to one of claims 1 to 4, characterised in that the lower tube base (8) is penetrated between the rows of tubes (7) by continuous transverse bores (7) open towards the water chamber (2).
EP01128682A 2000-12-14 2001-12-01 Heat recovery boiler for cooling hot synthesis gas Expired - Lifetime EP1219892B1 (en)

Applications Claiming Priority (2)

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DE10062320A DE10062320A1 (en) 2000-12-14 2000-12-14 Heat recovery boiler for cooling hot synthesis gas
DE10062320 2000-12-14

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EP1219892A1 EP1219892A1 (en) 2002-07-03
EP1219892B1 true EP1219892B1 (en) 2006-08-02

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US (1) US6435139B1 (en)
EP (1) EP1219892B1 (en)
JP (1) JP3941491B2 (en)
AT (1) ATE335166T1 (en)
DE (2) DE10062320A1 (en)

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JP2002195501A (en) 2002-07-10
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ATE335166T1 (en) 2006-08-15
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US20020073937A1 (en) 2002-06-20
DE50110605D1 (en) 2006-09-14
US6435139B1 (en) 2002-08-20

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