EP0048326B1 - Hot-gas cooler for a coal gasification plant - Google Patents

Hot-gas cooler for a coal gasification plant Download PDF

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Publication number
EP0048326B1
EP0048326B1 EP81105939A EP81105939A EP0048326B1 EP 0048326 B1 EP0048326 B1 EP 0048326B1 EP 81105939 A EP81105939 A EP 81105939A EP 81105939 A EP81105939 A EP 81105939A EP 0048326 B1 EP0048326 B1 EP 0048326B1
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EP
European Patent Office
Prior art keywords
insert
pressure vessel
hot
gas cooler
tubes
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Expired
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EP81105939A
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German (de)
French (fr)
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EP0048326A2 (en
EP0048326A3 (en
EP0048326B2 (en
Inventor
Jaroslav Zabelka
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ABB Management AG
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Gebrueder Sulzer AG
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/86—Other features combined with waste-heat boilers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/485—Entrained flow gasifiers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/78—High-pressure apparatus
    • 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
    • F22B1/1846—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 the hot gas being loaded with particles, e.g. waste heat boilers after a coal gasification plant
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
    • C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

Es ist ein Heissgaskühler nach dem Oberbegriff des Anspruchs 1 vorgeschlagen worden in dem die heissen Gase der Reaktionskammer einer Kohlevergasungsanlage auf eine Temperatur von rund 400 °C abgekühlt werden sollen. Die gasseitig hohe Temperaturspanne verlangt eine entsprechend gross dimensionierten Einsatz.A hot gas cooler according to the preamble of claim 1 has been proposed in which the hot gases of the reaction chamber of a coal gasification plant are to be cooled to a temperature of around 400 ° C. The high temperature range on the gas side requires a correspondingly large use.

Es ist Aufgabe der Erfindung, die Abmessungen eines derartigen Einsatzes und damit auch die Abmessungen des Druckgefässes klein zu halten, ohne dass dadurch seine Zugänglichkeit für die Wartung verunmöglicht würde.It is an object of the invention to keep the dimensions of such an insert and thus also the dimensions of the pressure vessel small, without this making its accessibility for maintenance impossible.

Diese Aufgabe wird durch die Merkmale nach dem Kennzeichen des Anspruchs 1 gelöst. Durch das Anordnen eines Hemdes aus dicht verschweissten Rohren wird ein zweiter, ringförmiger Gaszug gebildet, der innen durch die Wand des Einsatzes begrenzt ist. Im Gegensatz zum Ausgangspunkt der Erfindung wird bei dieser auch die Aussenseite des Einsatzes zur Wärmeübertragung verwendet; die Abmessungen des im Druckgefäss unterzubringenden Drucksystems können daher verkleinert werden. Ein besonderer Vorteil der Erfindung besteht darin, dass bei gegebener Länge des Einsatzes dessen Durchmesser nicht zu stark vergrössert werden muss, um die nötige Wärmeübertragerfläche zu erreichen. Eine zu starke Vergrösserung dieses Durchmessers hätte nämlich eine zu geringe Geschwindigkeit der abzukühlenden -Gassäule zur Folge, was sich in einem einseitigen Strömungsprofil auswirken könnte. Dadurch würde wiederum die Wärmeübertragerfläche schlecht ausgenutzt, mit der Folge, dass entweder die verlangte Abkühlung nicht erreicht würde oder aber Einsatz und Druckgefäss zusätzlich vergrössert werden müssten.This object is achieved by the features according to the characterizing part of claim 1. By placing a shirt made of tightly welded pipes, a second, ring-shaped throttle cable is formed, which is delimited on the inside by the wall of the insert. In contrast to the starting point of the invention, the outside of the insert is also used for heat transfer; the dimensions of the pressure system to be accommodated in the pressure vessel can therefore be reduced. A particular advantage of the invention is that, given the length of the insert, its diameter does not have to be increased too much in order to achieve the necessary heat transfer area. Too much enlargement of this diameter would result in too low a speed of the gas column to be cooled, which could result in a one-sided flow profile. This in turn would make poor use of the heat exchanger surface, with the result that either the cooling required would not be achieved or the insert and pressure vessel would have to be enlarged further.

Aus der DE-A-1 596323 ist ein Synthesegaserzeuger mit Gaskühler bekannt, die beide in einem gemeinsamen Druckgefäss angeordnet sind. Im unteren Teil des Druckgefässes befindet sich eine Brennkammer, an die sich nach oben ein Nachbrenn- oder Reaktionsraum anschiiesst, der von Kühlrohren umgeben ist. An diesen Reaktionsraum schliesst sich nach oben ein zentraler Gaszug mit rechteckigem Querschnitt an, wobei diesem Gaszug auf zwei Seiten je zwei parallele Gaszüge folgen, in denen das aus dem zentralen Gaszug kommende Gas zunächst abwärts und danach aufwärts strömt. Die die Gaszüge begrenzenden Wände bestehen aus Rohren mit zwischen ihnen eingeschweissten Stegen. Da der bekannte Synthesegaserzeuger sich hinsichtlich Erfindungsaufgabe als auch hinsichtlich der Gesamtkonstruktion in wesentlichen Punkten von der Erfindung unterscheidet, kann er kein Vorbild für die Erfindung abgeben.DE-A-1 596323 discloses a synthesis gas generator with a gas cooler, both of which are arranged in a common pressure vessel. In the lower part of the pressure vessel there is a combustion chamber, to which an afterburner or reaction chamber connects, which is surrounded by cooling tubes. At the top of this reaction chamber is a central gas flue with a rectangular cross-section, this gas flue being followed on two sides by two parallel gas flues in which the gas coming from the central gas flue first flows downwards and then upwards. The walls that delimit the throttle cables consist of pipes with webs welded between them. Since the known synthesis gas generator differs from the invention in essential points with regard to the object of the invention and also with regard to the overall construction, it cannot provide a model for the invention.

Einsatz und Hemd des erfindungsgemässen Heissgaskühlers können als koaxiale Kreiszylinderflächen ausgebildet sein. Die zusammengeschweissten Rohre lassen sich dabei als Mantellinien oder aber als Wendeln in den Zylinderflächen anordnen. Besonders vorteilhaft ist aber eine Lösung nach den Merkmalen der Ansprüche.2 und 3. Einsatz und Hemd bestehen demgemäss aus Rohrtafeln, die leicht in der Werkstatt hergestellt, an den Montageort transportiert und dort zusammengeschweisst werden können.The insert and shirt of the hot gas cooler according to the invention can be designed as coaxial circular cylindrical surfaces. The welded pipes can be arranged as surface lines or as spirals in the cylinder surfaces. However, a solution according to the features of claims 2 and 3 is particularly advantageous. The insert and shirt accordingly consist of tube sheets that can be easily manufactured in the workshop, transported to the assembly site and welded together there.

Die Lösung nach Anspruch 4 bringt den Vorteil, dass der Ringraum zwischen Einsatz und Hemd auf seinem Umfang gleichmässig verteilte Erweiterungen aufweist, die ein Befahren dieses Ringraumes für Wartungs- und Reparaturzwecke erleichtern.The solution according to claim 4 has the advantage that the annular space between insert and shirt has evenly distributed expansions on its circumference, which facilitate driving on this annular space for maintenance and repair purposes.

Die Erfindung wird nun an einem Ausführungsbeispiel anhand der Zeichnung näher erläutert.The invention will now be explained in more detail using an exemplary embodiment with reference to the drawing.

Es zeigen in schematischer Darstellung :

  • Figur 1 einen Vertikalschnitt durch einen Gaskühler nach der Erfindung und
  • Figur 2 einen Querschnitt durch den Gaskühler nach der Schnittlinie 11-11 in Fig. 1.
In a schematic representation:
  • 1 shows a vertical section through a gas cooler according to the invention and
  • 2 shows a cross section through the gas cooler along the section line 11-11 in Fig. 1st

In einem zylindrischen Druckgefäss 1 ist an einem inneren Balkenkranz 2 ein Einsatz 3 in Form eines langgestreckten Prismas mit Polygonquerschnitt und an einem äusseren Balkenkranz 4 ein Hemd 5 in Form eines langgestreckten Prismas mit Polygonquerschnitt aufgehängt. Der Einsatz 3 und das Hemd 5, die hier je ein reguläres, sechsseitiges primas bilden, bestehen je aus einer Reihe von vertikalen, über Stege miteinander dicht verschweissten Rohren 6, die auf Mantellinien des Prismas liegen. Zwischen dem Einsatz 3 und dem Hemd 5 besteht ein vertikaler Ringraum 11. Die Rohre 6 des Einsatzes 3 wie auch des Hemdes 5 sind in einem oberen Bereich nach innen abgekröpft, wobei ein Teil der Rohre 6 des Einsatzes 3, wiederum dicht miteinander verschweisst, einen Hals 7 mit Sechseckquerschnitt bildet. Dasselbe gilt für einen Teil der Rohre 6 des Hemdes 5, die einen Hals 9 bilden. Die restlichen, mit 6' bezeichneten Rohre des Einsatzes und des Hemdes verlaufen im Ringraum 11' zwischen den beiden Hälsen 7 und 9, und schliesslich sind die Enden aller Rohre 6 in einem sechseckigen Ringkollektor 12 eingeschweisst.In a cylindrical pressure vessel 1, an insert 3 in the form of an elongated prism with a polygonal cross section is suspended on an inner beam ring 2 and a shirt 5 in the form of an elongated prism with a polygonal cross section is suspended on an outer beam ring 4. The insert 3 and the shirt 5, which each form a regular, six-sided primate, each consist of a series of vertical tubes 6, which are welded tightly to one another via webs, and which lie on the generatrices of the prism. There is a vertical annular space 11 between the insert 3 and the shirt 5. The tubes 6 of the insert 3 as well as the shirt 5 are bent inwards in an upper region, a part of the tubes 6 of the insert 3, again welded tightly together, one Neck 7 with a hexagonal cross section forms. The same applies to part of the tubes 6 of the shirt 5, which form a neck 9. The remaining tubes of the insert and the shirt, designated 6 ', run in the annular space 11' between the two necks 7 and 9, and finally the ends of all the tubes 6 are welded into a hexagonal ring collector 12.

Die Rohre 6 des Einsatzes 3 wie auch des Hemdes 5 sind an ihrem unteren Ende mit einem gemeinsamen Verteiler 14 verbunden, der ebenfalls Sechseckumriss aufweist. Dabei sind im unteren Endbereich die Rohre des Einsatzes 3 abwechslungsweise so ausgebogen, dass ein offenes Rohrbüschel entsteht, durch das das zu kühlende Gas aus dem zentralen Fallraum 10 in den Ringraum 11 übertreten kann.The tubes 6 of the insert 3 as well as the shirt 5 are connected at their lower end to a common distributor 14, which also has a hexagonal outline. The tubes of the insert 3 are alternately bent out in the lower end region in such a way that an open tuft of tubes is formed, through which the gas to be cooled can pass from the central drop chamber 10 into the annular space 11.

Die Rohre 6 des Hemdes 5 bilden zusammen mit den Stegen eine bis zum Verteiler 14 reichende dichte Wand. Etwa die Hälfte der Rohre ist jedoch im untersten Bereich aus dieser Wand ausgebogen. Sie münden - wie üblich gegenüber den wandbildenden Rohren versetzt - in den Verteiler 14, um dessen Wand nicht unzulässig zu schwächen. Am Verteiler 14 ist unten ein Ring 20 angebracht, an dem ein Balg 21 befestigt ist, der eine dichte Verbindung herstellt zu einem Flansch 22 eines doppelwandigen Trichters 23. Der Hals 25 dieses Trichters durchdringt den Boden 26 des Druckgefässes 1. Der Zwischenraum zwischen den zwei Wänden dieses Trichters 23 ist mit Wasser gefüllt, das von unten (Pfeil 27) zugeführt wird und über Löcher 28 in das Innere des Trichters gelangt, wo es ein Niveau 24 bildet.The tubes 6 of the shirt 5, together with the webs, form a dense wall extending to the distributor 14. However, about half of the pipes are bent out of this wall in the lowest area. They open - offset as usual with respect to the wall-forming tubes - in the distributor 14 in order not to weaken the wall inadmissibly. At distributor 14 there is a ring 20 below attached to which a bellows 21 is attached, which creates a tight connection to a flange 22 of a double-walled funnel 23. The neck 25 of this funnel penetrates the bottom 26 of the pressure vessel 1. The space between the two walls of this funnel 23 is filled with water , which is fed from below (arrow 27) and passes through holes 28 into the interior of the funnel, where it forms a level 24.

An seinem oberen Ende ist der Hals 7 über ein nicht gezeichnetes nachgiebiges Element mit einem nach innen vorspringenden Rand 30 eines Rohres 31 verbunden, das mit Isoliersteinen 32 ausgekleidet ist und den Austrittskanal einer nicht gezeichneten Realtionskammer der Kohlevergasungsanlage darstellt. Das Rohr 31 ist von einem am Druckgefäss 1 befestigten Stutzen 34 mit Flansch 35 umgeben. Dieser Flansch 35 wird mit der genanten Reaktionskammer druckdicht verbunden.At its upper end, the neck 7 is connected via a flexible element (not shown) to an inwardly projecting edge 30 of a tube 31 which is lined with insulating stones 32 and which represents the outlet channel of a reaction chamber (not shown) of the coal gasification plant. The tube 31 is surrounded by a connector 34 with a flange 35 attached to the pressure vessel 1. This flange 35 is connected to the reaction chamber mentioned in a pressure-tight manner.

Am Hemd 5 ist eine Oeffnung 40 vorgesehen, in deren Bereich ein Teil der Rohre aus der Hemdflächenebene ausgebogen ist und dichtende Verbindungsrippen zwischen den Rohren fehlen. An der Aussenseite des Hemdes ist der Rand der Oeffnung 40 durch einen Balg 42 mit einer Austrittsleitung 43 verbunden, die den Druckbehälter 1 durch eine nachgiebige Hülse 44 verlässt.An opening 40 is provided on the shirt 5, in the area of which part of the tubes is bent out of the plane of the shirt surface and there are no sealing connecting ribs between the tubes. On the outside of the shirt, the edge of the opening 40 is connected by a bellows 42 to an outlet line 43, which leaves the pressure vessel 1 through a flexible sleeve 44.

Die zwischen dem Verteiler 14 und dem Sammler 12 parallel geschalteten Rohre 6 und 6' bilden mit Verteiler 14 und Sammler 12 zusammen das wärmeaufnehmende Drucksystem eines Dampferzeugers. Verteiler 14 und Sammler 12 sind zu diesem Zweck über nicht gezeichnete, das Druckgefäss 1 durchdringende Rohre mit den übrigen Anlageteilchen des Dampferzeugers verbunden.The pipes 6 and 6 'connected in parallel between the distributor 14 and the collector 12 together with the distributor 14 and collector 12 form the heat-absorbing pressure system of a steam generator. For this purpose, distributors 14 and collectors 12 are connected to the other system particles of the steam generator via pipes (not shown) which penetrate the pressure vessel 1.

Im Betrieb der Anlage strömen aus der erwähnten, nicht gezeichneten realtionskammer der Kohlevergasungsanlage Gase von etwa 1 400 °C, die Russ- und Schlacketeilchen enthalten, über das Rohr 31 und den Hals 7 in den Einsatz 3, in dem - vor allem durch Gasstrahlung an die gekühlten Rohre des Einsatzes - eine Abkühlung auf rund 1 000 °C stattfindet. Im Bereich des unteren Endes des Einsatzes 3 biegt die Gasströmung nach oben um in den Ringraum 11, während der weitaus grösste Teil der Russ- und Schlacketeilchen in den Trichter 23 fällt und aus diesem mit dem ständig über die Löcher 28 einströmenden Wasser abgeführt wird. Die im Ringraum 11 nach oben strömenden Gase werden weiter auf etwa 400 °C abgekühlt, woraufhin sie den Ringraum über die Austrittsleitung 43 verlassen. Die weitere, problemlosere Abkühlung geschieht in nachgeschalteten Wärme- übertragern, die sekundärseitig vorzugsweise ebenfalls Bestandteile der Dampferzeugeranlage bilden.During operation of the plant, gases from approximately 1,400 ° C., which contain soot and slag particles, flow from the mentioned, not shown, realtion chamber of the coal gasification plant, via the pipe 31 and the neck 7 into the insert 3, in which - mainly by gas radiation the cooled pipes of the insert - cooling down to around 1,000 ° C takes place. In the area of the lower end of the insert 3, the gas flow bends upward into the annular space 11, while the vast majority of the soot and slag particles fall into the funnel 23 and are removed therefrom with the water flowing continuously through the holes 28. The gases flowing upward in the annular space 11 are further cooled to approximately 400 ° C., whereupon they leave the annular space via the outlet line 43. Further, more problem-free cooling takes place in downstream heat exchangers, which preferably also form components of the steam generator system on the secondary side.

Einsatz 3 und Hemd 5 sind über Zugbänder 16 bzw. 17 am Balkenkranz 2 bzw. 4 aufgehängt. Die Zugbänder gehen zweckmässig von den Stegblechen zwischen den Rohren 6 aus. Dabei können die Zugbänder 16 im Bereich der oberen Aussenkante des Einsatzes 3 bis zu den etwa horizontal verlaufenden, dicht miteinander verbundenen Rohren 6 des Hemdes 5 gasdicht miteinander verbunden sein, sodass der Fallraum 10 und der Ringraum 11 vollständig vom Raum ausserhalb des Hemdes 5 getrennt sind. Es kann auch zweckmässig sein, insbesondere im oberen Bereich des Ringraums 11, eine Verbindungsöffnung zum Raum ausserhalb des Hemdes 5 vorzusehen, so dass stets ein gewisser Druckausgleich über die Wand des Hemdes besteht und dieses nicht durch grössere Druckkräfte belastet werden kann.Insert 3 and shirt 5 are suspended from tie bars 16 and 17 on beam rings 2 and 4, respectively. The drawstrings expediently start from the web plates between the tubes 6. The drawstrings 16 can be connected gas-tight in the region of the upper outer edge of the insert 3 up to the approximately horizontal, tightly interconnected tubes 6 of the shirt 5, so that the fall space 10 and the annular space 11 are completely separated from the space outside the shirt 5 . It can also be expedient, in particular in the upper region of the annular space 11, to provide a connection opening to the space outside the shirt 5, so that there is always a certain pressure equalization over the wall of the shirt and this cannot be loaded by greater compressive forces.

Die Ecken 50 des Einsatzes 3 und die Ecken 51 des Hemdes 5 sind, wie Fig. 2 zeigt, um einen Winkel -y = 360°/2 x 6 = 30° gegeneinander versetzt. Es entstehen dadurch im Ringraum 11 sechs über den Umfang verteilte Erweiterungen 52, die die Wartung der den Einsatz 3 und das Hemd 5 bildenden Rohrwände wesentlich erleichtern. Aehnliche Erweiterungen 53 ergeben sich zwischen dem Hemd 5 und der kreiszylindrischen Wand des Druckgefässes 1. Die Erweiterungen 52 und 53 sind über nicht dargestellte Mannlöcher im Druckgefäss 1 und im Hemd 5 und/oder über die vorhandenen Druckgefässöffnungen bei 34 und 43 erreichbar.The corners 50 of the insert 3 and the corners 51 of the shirt 5 are, as shown in FIG. 2, offset by an angle -y = 360 ° / 2 x 6 = 30 °. This creates six extensions 52 distributed over the circumference in the annular space 11, which considerably facilitate the maintenance of the tube walls forming the insert 3 and the shirt 5. Similar extensions 53 result between the shirt 5 and the circular cylindrical wall of the pressure vessel 1. The extensions 52 and 53 can be reached via manholes (not shown) in the pressure vessel 1 and in the shirt 5 and / or via the existing pressure vessel openings at 34 and 43.

Bei Heissgaskühlern für Kohlevergasungsanlagen ist es besonders wichtig, dass die Wärme- übertragerflächen gedrungen sind, weil die abzukühlenden Heissgase unter verhältnismässig hohem Ueberdruck von beispielsweise 4 MPa (rund 40 atü) stehen, was ein .verhältnismässig dickwandiges Druckgefäss bedingt.With hot gas coolers for coal gasification plants, it is particularly important that the heat transfer surfaces are compact, because the hot gases to be cooled are under a relatively high overpressure of, for example, 4 MPa (around 40 atm), which requires a relatively thick-walled pressure vessel.

Abweichend von der im Querschnitt sechseckigen Gestaltung des Einsatzes 3 und des Hemdes 5 ist es auch möglich, diesen jeweils eine n-eckige Polygonform zu geben, wobei n eine beliebige ganze Zahl grösser als 2 sein kann.Deviating from the hexagonal design of the insert 3 and the shirt 5, it is also possible to give them an n-polygonal shape, where n can be any integer greater than 2.

Claims (4)

1. A hot-gas cooler for a coal gasification plant, consisting of a vertical and substantially cylindrical pressure vessel containing a peripherally closed insert consisting of tubes welded together to be sealing-tight, said insert forming a fall space and being disposed coaxially in the pressure vessel, the said tubes being part of the fired pressure system of a steam or vapour generator and the space enclosed by the insert being connected at the top to a reaction chamber of the coal gasification plant via a gas feed duct extending through the pressure vessel, and at the bottom to a slag discharge device via an outlet duct, characterised in that the insert (3) is surrounded by a shell (5) which also consists of tubes (6) welded to be sealing-tight, so as to form an annular space (11) which surrounds the insert (3) and is sealed off from the pressure vessel jacket, the bottom zone of the annular space communicating with the interior (10) of the insert (3) ; and at least one preferably coolable gas outlet conduit (43) connected to the shell (5) is provided in the top part of the annular space (11) and extends through the wall of the pressure vessel (1).
2. A hot-gas cooler according to claim 1, characterised in that the insert (3) forms an elongate prism of polygonal cross-section, preferably a regular n-sided cross-section.
3. A hot-gas cooler according to claim 2, characterised in that the shell (5) also basically forms an elongate prism of polygonal cross-section, preferably a regular n-sided cross-section.
4. A hot-gas cooler according to claim 3, in which the insert (3) and the shell (5) each form an n-sided regular prism, characterised in that the two n-sided prisms are offset from one another by the angle y=360°/2n in respect of their longitudinal axes.
EP81105939A 1980-09-19 1981-07-28 Hot-gas cooler for a coal gasification plant Expired EP0048326B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH7051/80A CH653360A5 (en) 1980-09-19 1980-09-19 HEISSGASKUEHLER AT A coal gasification plant.
CH7051/80 1980-09-19

Publications (4)

Publication Number Publication Date
EP0048326A2 EP0048326A2 (en) 1982-03-31
EP0048326A3 EP0048326A3 (en) 1982-05-26
EP0048326B1 true EP0048326B1 (en) 1984-03-21
EP0048326B2 EP0048326B2 (en) 1989-02-01

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EP81105939A Expired EP0048326B2 (en) 1980-09-19 1981-07-28 Hot-gas cooler for a coal gasification plant

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US (1) US4395268A (en)
EP (1) EP0048326B2 (en)
JP (1) JPS5787587A (en)
CH (1) CH653360A5 (en)
DE (2) DE3043855C2 (en)
ZA (1) ZA815916B (en)

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Publication number Publication date
JPS5787587A (en) 1982-06-01
EP0048326A2 (en) 1982-03-31
DE3162802D1 (en) 1984-04-26
ZA815916B (en) 1982-08-25
CH653360A5 (en) 1985-12-31
US4395268A (en) 1983-07-26
DE3043855A1 (en) 1982-04-08
JPH0253713B2 (en) 1990-11-19
DE3043855C2 (en) 1983-05-19
EP0048326A3 (en) 1982-05-26
EP0048326B2 (en) 1989-02-01

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