EP0502158B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0502158B1
EP0502158B1 EP91916799A EP91916799A EP0502158B1 EP 0502158 B1 EP0502158 B1 EP 0502158B1 EP 91916799 A EP91916799 A EP 91916799A EP 91916799 A EP91916799 A EP 91916799A EP 0502158 B1 EP0502158 B1 EP 0502158B1
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EP
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Prior art keywords
heat exchanger
cavities
side walls
partitions
exchanger according
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EP91916799A
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German (de)
French (fr)
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EP0502158A1 (en
Inventor
Dieter Wallstein
Peter Dittmann
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WALLSTEIN Dieter
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WALLSTEIN Dieter
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/006Constructions of heat-exchange apparatus characterised by the selection of particular materials of glass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers

Definitions

  • the housing and the partition walls are preferably made of highly corrosion-resistant metal sheets and the exchanger tubes are preferably made of glass. Such heat exchangers are used in particular in exhaust gas cleaning systems.
  • any defects in the partition wall can be detected directly optically, thereby considerably reducing the repair time, which is conventionally largely used to locate any damaged areas can be reduced.
  • Spacer rods 13 are arranged within the cavity 6 and are welded on in an interrupted manner on the partition 8 or on the side wall 2.
  • the cavity 6 can be kept stable by means of these spacer rods.

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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)
  • Separation By Low-Temperature Treatments (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

A heat exchanger for cooling hot crude gas containing aggressive components and for heating the pure gas obtained from the crude gas has a housing (1) formed by two lateral walls (2, 3) and upper and lower tubular bottoms (4, 5) . Partitions (8, 9) are linked to the lateral walls (2, 3) in order to form an inner cavity. In the upper and lower tubular bottoms (4, 5) are inserted the ends of a plurality of mutually parallel exchanger tubes (10) that extend parallel to the lateral walls. The hot crude gas flows through the exchanger tubes (10) and the pure gas flows through the housing (1) transversely to the exchanger tubes (10). The invention should ensure that the lateral walls of the heat exchangers are better protected against corrosion. For this purpose, an underpressure is applied to the cavities (6) formed between the lateral walls and the partitions, and the noxious gases of the pure gas that diffuse through the partitions into the cavities are fed by a duct into the stream of pure gas. Alternatively, an overpressure can be applied in the cavities formed between the lateral walls and the partitions.

Description

Die Erfindung betrifft einen Wärmetauscher zur Kühlung von heißem Rohgas mit aggressiven Bestandteilen und zur Erwärmung des zu Reingas gereinigten Rohgases, dessen Gehäuse von zwei Seitenwänden und einem oberen und unteren Rohrboden gebildet ist, wobei den Seitenwänden innen zur Bildung von Hohlräumen Trennwände zugeordnet sind und in den oberen und unteren Rohrböden die Enden einer Vielzahl von parallel zueinander und zu den Seitenwänden angeordneten Tauscherrohren eingesetzt sind und das heiße Rohgas die Tauscherrohre und das Reingas das Gehäuse quer zu den Tauscherrohren durchströmt.The invention relates to a heat exchanger for cooling hot raw gas with aggressive constituents and for heating the raw gas cleaned to clean gas, the housing of which is formed by two side walls and an upper and lower tube sheet, the side walls being assigned inside to form cavities and in the Upper and lower tube sheets, the ends of a plurality of exchanger tubes arranged parallel to one another and to the side walls are inserted, and the hot raw gas flows through the exchanger tubes and the clean gas through the housing transversely to the exchanger tubes.

Das Gehäuse sowie die Trennwände sind vorzugsweise aus hochkorrosionsfesten Blechen und die Tauscherrohre vorzugsweise aus Glas hergestellt. Derartige Wärmetauscher finden insbesondere in Abgasreinigungsanlagen Verwendung.The housing and the partition walls are preferably made of highly corrosion-resistant metal sheets and the exchanger tubes are preferably made of glass. Such heat exchangers are used in particular in exhaust gas cleaning systems.

Durch die DE 31 42 485 C2 ist ein Glasrohrwärmetauscher vorgenannter Art bekannt, bei dem an den Seitenwänden Strömungskanäle ausgebildet sind, die zur Erwärmung dieser Wände und damit zur Vermeidung von korrodierenden Kondensationen von heißem Rauchgas durchströmt sind. Der angestrebte Zwecke wird mit dem bekannten Glasrohrwärmetauscher jedoch nicht mit Sicherheit erreicht, da sich das heiße Rauchgas in den Strömungskanälen oftmals soweit abkühlt, daß Säurepunktunterschreitungen eintreten und dadurch Korrosionen infolge der aggressiven Bestandteile des Rauchgases wirksam werden.From DE 31 42 485 C2 a glass tube heat exchanger of the aforementioned type is known, in which flow channels are formed on the side walls, through which hot flue gas flows to heat these walls and thus to avoid corrosive condensation. The intended purpose is not achieved with the known glass tube heat exchanger with certainty, however, since the hot flue gas in the flow channels often cools to such an extent that the acid points are undershot and, as a result, corrosion occurs due to the aggressive constituents of the flue gas.

Um diese Nachteile zu beheben, ist es durch die DE 33 33 057 Cl bekannt, einen Glasrohrwärmetauscher der hier in Rede stehenden Art dahingehend zu verbessern, daß die Erwärmung der Seitenwände nicht unmittelbar durch Einleitung des heißen Rauchgases in deren Strömungskanäle erfolgt, sondern mittelbar mit Hilfe von reiner Umgebungsluft, welche jedoch zuvor von dem heißen Rauchgas in einem weiteren Wärmetauscher aufgeheizt wird, der in den Strömungskanälen an den Seitenwänden ausgebildet ist. Auch bei dieser bekannten Ausführung eines Wärmetauschers können bei niedrigen Rauchgastemperaturen ebenfalls Taupunktunterschreitungen in den Tauscherrohren der Wärmetauscher in den Strömungskanälen auftreten, ganz abgesehen davon, daß in diesen die anzustrebende gleichmäßige Temperaturverteilung nicht erreichbar ist.To overcome these disadvantages, it is known from DE 33 33 057 Cl to improve a glass tube heat exchanger of the type in question in such a way that the heating of the side walls does not take place directly by introducing the hot flue gas into their flow channels, but indirectly with the help of pure ambient air, which, however, is previously heated by the hot flue gas in a further heat exchanger which is formed in the flow channels on the side walls. Even in this known embodiment of a heat exchanger, dew point drops may also occur in the exchanger tubes of the heat exchangers in the flow channels at low flue gas temperatures, quite apart from the fact that the desired uniform temperature distribution cannot be achieved in these.

Von diesem Stand der Technik ausgehend liegt der Erfindung die Aufgabe zugrunde, einen Wärmetauscher zu schaffen, bei dem die Seitenwände mit geringem apparativen Aufwand besser gegen korrodierende Kondensationen geschützt werden können.Starting from this prior art, the invention has for its object to provide a heat exchanger in which the side walls can be better protected against corrosive condensation with little equipment.

Erfindungsgemäß wird dies dadurch erreicht, daß die zwischen den Seiten- und den Trennwänden ausgebildeten Hohlräume mit Unterdruck beaufschlagt sind und daß durch die Trennwände in die Hohlräume diffundierte Schadgase des Reingases durch eine Leitung dem Reingasstrom zugeführt werden, bzw. dadurch, daß die zwischen den Seiten- und den Trennwänden ausgebildeten Hohlräume mit Überdruck beaufschlagt sind.According to the invention, this is achieved in that the cavities formed between the side walls and the partition walls are subjected to negative pressure and that harmful gases of the clean gas diffused into the cavities through the partition walls are supplied to the clean gas flow through a line, or in that the between the sides - And the partitions formed cavities are pressurized.

Erfindungsgemäß wird diese bisher durchgängige Maßnahme zum Schutz der Seitenwände, nämlich diese zu beheizen, verlassen. Gemäß der ersten Alternative wird eine Korrosion der Seitenwände dadurch verhindert, daß etwaig in den Zwischenraum bzw. Hohlraum zwischen der Trenn- und der Seitenwand eingedrungene Schadgase des Reingases unmittelbar nach ihrem Eindringen aufgrund des Unterdrucks aus dem Hohlraum entfernt und dem Reingasstrom zugeführt werden. Die Zeit, in der das Schadgas innerhalb des Hohl- bzw. Zwischenraums verbleibt, ist zur Kondensation des Schadgases und damit für eine etwaige Beschädigung der Seitenwand nicht ausreichend. Gemäß der anderen Lösungsalternative wird der Hohl- bzw. Zwischenraum zwischen der Seiten- und der Trennwand unter Überdruck gehalten. Hierdurch wird überhaupt das Eindringen von Schadgasen in diesen Hohlraum vermieden. Die Seitenwände sind demgemäß zuverlässig gegen eine Korrosion aufgrund der Kondensation von aus dem Reingasstrom stammenden Schadgasen geschützt.According to the invention, this measure for protecting the side walls, namely heating them, has been abandoned up to now. According to the first alternative, corrosion of the side walls is prevented by the fact that any harmful gases of the clean gas which have penetrated into the intermediate space or cavity between the partition and the side wall are removed from the cavity immediately after their penetration due to the negative pressure and are fed to the clean gas stream. The time in which the harmful gas remains within the cavity or intermediate space is not sufficient for the condensation of the harmful gas and thus for any damage to the side wall. According to the Another alternative solution, the cavity or space between the side and the partition is kept under positive pressure. In this way, the penetration of harmful gases into this cavity is avoided at all. The side walls are accordingly reliably protected against corrosion due to the condensation of harmful gases originating from the clean gas stream.

Wenn der Unterdruck in den Hohlräumen durch den an einem Anschluß der Leitung erzeugten Saugzug des Reingasstroms erzeugt wird, kann die Abfuhr in den Hohl- bzw. Zwischenraum eingedrungener Schadgase in apparativ besonders einfacher Weise durchgeführt werden, wobei der Unterdruck allein durch den aufgrund der Strömung des Reingasstroms erzeugbaren Saugdruck aufgebracht wird.If the negative pressure in the cavities is generated by the suction of the clean gas flow generated at a connection of the line, the discharge into the cavity or intermediate space penetrating harmful gases can be carried out in a particularly simple manner in terms of apparatus, the negative pressure solely due to the flow of the Clean gas flow generated suction pressure is applied.

Zur Unterstützung der Unterdruckerzeugung in den Hohlräumen kann in der die Hohlräume mit dem Reingasstrom verbindenden Leitung eine Pumpe angeordnet werden, wodurch das Druckgefälle erhöht werden kann. Durch diese Erhöhung des Druckgefälles kann die Verweilzeit etwaig in den Hohlraum eingedrungener Schadgase innerhalb des Hohlraums weiter herabgesetzt werden.To support the generation of negative pressure in the cavities, a pump can be arranged in the line connecting the cavities to the clean gas flow, as a result of which the pressure gradient can be increased. As a result of this increase in the pressure gradient, the dwell time of any harmful gases that have penetrated into the cavity can be reduced further within the cavity.

Durch die Überwachung des im Hohlraum herrschenden überdrucks mittels eines Manometers oder mehrerer Manometer kann in zuverlässiger Weise das Auftreten einer Beschädigung der Trennwand ermittelt werden, da jedweder Druckabfall innerhalb des Hohlraums unmittelbar erfaßt werden kann. Eine Unterbrechung des Betriebs des Wärmetauschers ist auch bei Beschädigungen der Trennwand nicht erforderlich, da durch Zufuhr von Frischluft oder einem Inertgas in den Hohlraum der Überdruck innerhalb des Hohlraums aufrecht erhalten und das Eindringen von Schadgasen zuverlässig verhindert werden kann. Bei dem nächsten planmäßigen Betriebsstillstand kann dann die Trennwand repariert werden.By monitoring the excess pressure in the cavity using a pressure gauge or several pressure gauges, in the occurrence of damage to the partition wall can be reliably determined since any pressure drop within the cavity can be detected directly. An interruption in the operation of the heat exchanger is not necessary even if the partition is damaged, since the supply of fresh air or an inert gas into the cavity maintains the excess pressure inside the cavity and the penetration of harmful gases can be reliably prevented. The partition can then be repaired at the next scheduled shutdown.

Sofern das in den Hohlraum eingepumpte Inertgas bzw. die in den Hohlraum eingepumpte Frischluft mit einem Farbstoff versehen wird, können etwaige Fehlerstellen der Trennwand unmittelbar optisch erfaßt werden, wodurch sich die Reparaturzeit, die herkömmlicherweise zu einem Großteil für das Auffinden etwaiger Schadstellen verbraucht wird, erheblich reduziert werden kann.If the inert gas pumped into the cavity or the fresh air pumped into the cavity is provided with a dye, any defects in the partition wall can be detected directly optically, thereby considerably reducing the repair time, which is conventionally largely used to locate any damaged areas can be reduced.

Vorteilhaft können die Hohlräume in mindestens zwei Abschnitte unterteilt werden, wobei der in diesen vorhandene Überdruck bzw. Unterdruck mittels entsprechender Druckmeßeinrichtungen überwacht ist, wodurch insbesondere bei vergleichsweise großen Ausführungen eine schnelle und einfache Lokalisierung einer eingetretenen Beschädigung möglich ist.The cavities can advantageously be subdivided into at least two sections, the overpressure or underpressure present in them being monitored by means of appropriate pressure measuring devices, as a result of which quick and easy localization of damage that has occurred is possible, in particular in the case of comparatively large designs.

Gemäß einem weiteren Merkmal der Erfindung wird vorgeschlagen, daß sich bei einem gattungsgemäßen Wärmetauscher in den Hohlräumen eine Adsorptionsmittelschüttung befindet, sei es in Form eines Mehls oder Granulats. Vorzugsweise findet als Adsorptionsmittel Kalkstein, Aktivkohle od.dgl. Verwendung. Bei etwaigen Korrosionserscheinungen trifft das Rauchgas zuerst auf die Adsorptionsmittelschüttung und verhindert den direkten Kontakt mit den Seitenwandungen, da das Verwendung findende Adsorptionsmittel gegen die im Rauchgas befindlichen Schadstoffe nicht nur resistent ist, sondern diese auch adsorbiert und neutralisiert. Ist eine Leckage aufgetreten, so läßt sich diese über den in den Wandungen in den oberen Bereichen der Hohlräume vorgesehene Stutzen leicht feststellen, welche der Entlüftung oder Leckageanzeige dienen. Etwa auftretende Kondensate können über Entwässerungsstutzen abgezogen werden, welche in den unteren Bereichen der Hohlräume vorhanden sind.According to a further feature of the invention, it is proposed that in a generic heat exchanger there is an adsorbent bed in the cavities, be it in the form of flour or granules. Limestone, activated carbon or the like is preferably used as the adsorbent. Use. In the event of any signs of corrosion, the flue gas hits the adsorbent bed first and prevents direct contact with the side walls, since the adsorbent used is not only resistant to the pollutants in the flue gas, but also adsorbs and neutralizes them. If a leak has occurred, it can be easily determined via the connecting piece provided in the walls in the upper regions of the cavities, which are used for venting or indicating leakage. Any condensate that occurs can be drawn off via drainage connections which are present in the lower areas of the cavities.

Je nach dem angestrebten Sicherheitsgrad gegen Korrosionserscheinungen ist es auch möglich, die Verwendung einer Adsorptionsmittelschüttung mit der Unterdruck- oder Überdruckmethode zu kombinieren.Depending on the desired level of security against corrosion, it is also possible to combine the use of an adsorbent fill with the negative pressure or positive pressure method.

Vorteilhaft sind die Trennwände und/oder die Seitenwände ganz oder teilweise auswechselbar ausgebildet und angeordnet, so daß bei Auftreten einer Leckage diese ganz oder abschnittsweise ausgewechselt werden können, wobei der Betrieb des Wärmetauschers weiter fortgeführt werden kann.The partitions and / or the side walls are advantageously designed and arranged to be completely or partially exchangeable, so that if a leak occurs, it can be exchanged in whole or in sections, the operation of the heat exchanger being able to continue.

Um die Störanfälligkeit des Wärmetauschers weiter zu verringern, ist es auch möglich, weitere Bauteile des Wärmetauschers, nämlich den unteren Rohrboden, den oberen Rohrboden, den Eintrittflansch und den Austrittflansch alternativ oder gemeinsam doppelbödig bzw. doppelwandig auszuführen und die so entst denen Hohlräume an die Überdruck- bzw. die Unterdruckquelle anzuschließen. Somit können auch diese. gefährdeten Bereiche besser gegen Korrosion geschützt werden.In order to further reduce the susceptibility to malfunction of the heat exchanger, it is also possible to design additional components of the heat exchanger, namely the lower tube sheet, the upper tube sheet, the inlet flange and the outlet flange, alternatively or jointly with double or double walls, and this creates cavities to the overpressure - or to connect the vacuum source. So this can also. better protected areas against corrosion.

Um die Hohlräume stabil zu gestalten, können in diesen Abstandhalterstangen angeordnet werden, die unterbroche an die entsprechenden Wände angeschweißt werden können.In order to make the cavities stable, spacer rods can be arranged in these, which can be welded on to the corresponding walls.

Ein Ausführungsbeispiel der Erfindung ist an Hand der Zeichnung näher erläutert, und zwar zeigt:

Figur 1
eine Seitenansicht eines Wärmetauschers;
Figur 2
eine Draufsicht der Figur 1 und
Figur 3
eine Darstellung von für die Erfindung wesentlichen Teilen des Wärmetauschers.
An embodiment of the invention is explained in more detail with reference to the drawing, which shows:
Figure 1
a side view of a heat exchanger;
Figure 2
a plan view of Figure 1 and
Figure 3
a representation of parts of the heat exchanger essential for the invention.

Das Gehäuse 1 des Wärmetauschers ist von den beiden Seitenwänden 2, 3, welche gleichzeitig die Außenwände darstellen, und einem oberen und unteren Rohrboden 4, 5 gebildet. Den Seitenwänden 2, 3 sind innen zur Bildung von Hohlräumen 6, 7 Trennwände 8, 9 zugeordnet. In den oberen und unteren Rohrboden 4, 5 sind die Enden einer Vielzahl von parallel zueinander und zu den Seitenwänden 2, 3 angeordneten Tauscherrohren 10 eingesetzt. Das heiße Rohgas durchströmt die Tauscherrohre 10, während das gereinigte Reingas das Gehäuse 1 des Wärmetauschers quer zu den Tauscherrohren 10 durchströmt. Die Seitenwände 2, 3 sowie die Trennwände 8, 9 und der obere und der untere Rohrboden 4, 5 bestehen vorzugsweise aus hochkorrosionsfesten Blechen, während die Tauscherrohre 10 vorzugsweise aus Glas hergestellt sind. Es ist jedoch auch möglich, diese beispielsweise aus Graphit oder Kunststoff zu fertigen.The housing 1 of the heat exchanger is formed by the two side walls 2, 3, which simultaneously represent the outer walls, and an upper and lower tube sheet 4, 5. The side walls 2, 3 are assigned inside to form cavities 6, 7 partitions 8, 9. The ends of a multiplicity of exchanger tubes 10 arranged parallel to one another and to the side walls 2, 3 are inserted into the upper and lower tube sheets 4, 5. The hot raw gas flows through the exchanger tubes 10, while the cleaned clean gas flows through the housing 1 of the heat exchanger transversely to the exchanger tubes 10. The side walls 2, 3 and the partitions 8, 9 and the upper and lower tube sheets 4, 5 are preferably made of highly corrosion-resistant sheets, while the exchanger tubes 10 are preferably made of glass. However, it is also possible to manufacture them from graphite or plastic, for example.

Wie am besten aus Figur 3 hervorgeht, ist jeder Hohlraum - in der Darstellung gemäß Figur 3 der Hohlraum 6 - über eine Leitung 11 an eine externe Druckquelle angeschlossen.As can best be seen from FIG. 3, each cavity - in the illustration according to FIG. 3 the cavity 6 - is connected via a line 11 to an external pressure source.

Mittels der externen Druckquelle kann innerhalb des Hohlraums 6 ein Unter- oder ein Überdruck erzeugt werden. Bei Erzeugung eines Unterdrucks wird Schadgas, das in den Hohlraum 6 eintritt, so schnell abgeführt, daß es innerhalb des Hohlraums 6 nicht kondensiert. Hierdurch wird die Seitenwand 2 zuverlässig gegen Korrosion geschützt.A negative or positive pressure can be generated within the cavity 6 by means of the external pressure source. When a negative pressure is generated, harmful gas which enters the cavity 6 is discharged so quickly that it does not condense within the cavity 6. This makes the side wall 2 reliable protected against corrosion.

Sofern durch die Leitung 11 bzw. durch eine in der Leitung 11 angeordnete Druckquelle innerhalb des Hohlraums 6 ein Überdruck aufrecht erhalten wird, wird das Eindringen von Schadgasen in den Hohlraum 6 zuverlässig verhindert.If an excess pressure is maintained within the cavity 6 by the line 11 or by a pressure source arranged in the line 11, the penetration of harmful gases into the cavity 6 is reliably prevented.

Innerhalb des Hohlraums 6 sind Abstandhalterstangen 13 angeordnet, die an der Trennwand 8 bzw. an der Seitenwand 2 unterbrochen angeschweißt sind. Durch diese Abstandhalterstangen kann der Hohlraum 6 stabil gehalten werden.Spacer rods 13 are arranged within the cavity 6 and are welded on in an interrupted manner on the partition 8 or on the side wall 2. The cavity 6 can be kept stable by means of these spacer rods.

Wie in Figur 2 angedeutet, kann die Leitung 11 an einen Anschluß 12 angeschlossen sein; der Anschluß 12 ist seinerseits so an den Reingasstrom angeschlossen, daß der infolge der Reingasströmung auftretende Saugdruck zur Unterdruckerzeugung innerhalb des Hohlraums 6 nutzbar ist und als Unterdruckquelle dient.As indicated in Figure 2, the line 11 can be connected to a terminal 12; the connection 12 is in turn connected to the clean gas flow in such a way that the suction pressure occurring as a result of the clean gas flow can be used for generating negative pressure within the cavity 6 and serves as a negative pressure source.

In der Leitung 11 kann jedoch auch eine Unterdruckpumpe angeordnet sein, durch die die Unterdruckerzeugung innerhalb des Hohlraums 6 unterstützt bzw. bewerkstelligt wird.However, a vacuum pump can also be arranged in line 11, by means of which the generation of vacuum within cavity 6 is supported or accomplished.

Falls innerhalb des Hohlraums 6 ein Überdruck vorgesehen ist, kann die Leitung 11 außer der Überdruckquelle zusätzlich ein Manometer enthalten, mittels dem der Überdruck innerhalb des Hohlraums 6 überwacht werden kann.If an overpressure is provided within the cavity 6, the line 11 can in addition to the overpressure source Contain pressure gauges, by means of which the overpressure within the cavity 6 can be monitored.

Es ist auch möglich, die Reingase durch die Tauscherrohre zu leiten und die Rohgase diese umströmen zu lassen.It is also possible to pass the clean gases through the exchanger tubes and allow the raw gases to flow around them.

Claims (16)

  1. Heat exchanger for cooling hot crude gas with aggressive components and for heating the crude gas purified to form clean gas, of which the housing (1) is formed by two side walls (2, 3) and an upper and lower tube plate (4, 5), partitions (8, 9) being associated with the side walls (2, 3) on the interior in order to form a cavity (6, 7), and the ends of a plurality of exchanger tubes (10) which are disposed parallel to one another and to the side walls (2, 3) being inserted in the upper and lower tube plates (4, 5), and the hot crude gas flowing through the exchanger tubes (10) and the clean gas flowing through the housing (1) transversely to the exchanger tubes (10), characterised in that the cavities (6, 7) formed between the side walls (2, 3) and the partitions (8, 9) are acted upon by negative pressure; and in that pollution gases of the clean gas diffused through the partitions (8, 9) into the cavities (6, 7) are delivered by a pipe (11) to the stream of clean gas.
  2. Heat exchanger according to Claim 1, characterised in that the negative pressure in the cavities (6, 7) is generated by the suction draft of the clean gas stream produced at a connection (12) of the pipe (11).
  3. Heat exchanger according to either of Claims 1 and 2, characterised in that a pump is disposed in the pipe (11), connecting the cavities (6, 7) to the suction draft of the clean gas, for assisting the generation of the negative pressure.
  4. Heat exchanger for cooling hot crude gas with aggressive components and for heating the crude gas purified to form clean gas, of which the housing (1) is formed by two side walls (2, 3) and an upper and lower tube plate (4, 5), partitions (8, 9) being associated with the side walls (2, 3) on the interior in order to form a cavity (6, 7), and the ends of a plurality of exchanger tubes (10) which are disposed parallel to one another and to the side-walls (2, 3) being inserted in the upper and lower tube plates (4, 5), and the hot crude gas flowing through the exchanger tubes (10) and the clean gas flowing through the housing (1) transversely to the exchanger tubes (10), characterised in that the cavities (6, 7) formed between the side walls (2, 3) and the partitions (8, 9) are acted upon by excess pressure.
  5. Heat exchanger according to Claim 4, characterised in that one or more manometers is/are provided for monitoring the excess pressure.
  6. Heat exchanger according to either of Claims 4 and 5, characterised in that the cavities (6, 7) are filled with an inert gas or with fresh air.
  7. Heat exchanger according to Claim 6, characterised in that the inert gas or fresh air is provided with a dye.
  8. Heat exchanger according to any one of Claims 1 to 7, characterised in that the cavities (6, 7) are divided into at least two portions, the excess pressure or negative pressure prevailing in these portions being monitored by means of one or more corresponding pressure gauges.
  9. Heat exchanger for cooling hot crude gas with aggressive components and for heating the crude gas purified to form clean gas, of which the housing (1) is formed by two side walls (2, 3) and an upper and lower tube plate (4, 5), partitions (8, 9) being associated with the side walls (2, 3) on the interior in order to form a cavity (6, 7), and the ends of a plurality of exchanger tubes (10) which are disposed parallel to one another and to the side walls (2, 3) being inserted in the upper and lower tube plates (4, 5), and the hot crude gas flowing through the exchanger tubes (10) and the pure gas flowing through the housing (1) transversely to the exchanger tubes (10), in particular according to any one of Claims 1 to 8, characterised in that there is an adsorption agent filling in the cavities (6, 7).
  10. Heat exchanger according to Claim 9, characterised in that limestone, activated carbon or the like is used as the adsorption agent.
  11. Heat exchanger according to any one of Claims 1 to 10, characterised in that connection pieces are provided in the walls in the upper regions of the cavities (6, 7).
  12. Heat exchanger according to any one of Claims 1 to 11, characterised in that drainage connection pieces are provided in the walls in the lower regions of the cavities (6, 7).
  13. Heat exchanger according to any one of Claims 1 to 12, characterised in that the partitions (8, 9) and/or the side walls (2, 3) are formed and disposed so as to be completely or partially replaceable.
  14. Heat exchanger according to any one of Claims 1 to 13, characterised in that the lower (5) and/or the upper tube plate (4) is/are formed with a double base, the cavity formed between the two bases being connected to the negative or excess pressure.
  15. Heat exchanger according to any one of Claims 1 to 14, characterised in that the inlet and/or the outlet flange of the heat exchanger is/are formed with a double wall, the cavity formed between the two walls being connected to the negative or excess pressure.
  16. Heat exchanger according to any one of Claims 1 to 5, characterised in that spacer rods (13) which are welded discontinuously to the walls (2, 3, 8, 9), are disposed in the cavities (6, 7).
EP91916799A 1990-09-25 1991-09-25 Heat exchanger Expired - Lifetime EP0502158B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4030250 1990-09-25
DE4030250A DE4030250A1 (en) 1990-09-25 1990-09-25 HEAT EXCHANGER
PCT/EP1991/001826 WO1992005395A1 (en) 1990-09-25 1991-09-25 Heat exchanger

Publications (2)

Publication Number Publication Date
EP0502158A1 EP0502158A1 (en) 1992-09-09
EP0502158B1 true EP0502158B1 (en) 1994-12-14

Family

ID=6414902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91916799A Expired - Lifetime EP0502158B1 (en) 1990-09-25 1991-09-25 Heat exchanger

Country Status (7)

Country Link
EP (1) EP0502158B1 (en)
AT (1) ATE115715T1 (en)
CS (1) CS152692A3 (en)
DE (2) DE4030250A1 (en)
HU (1) HUT61399A (en)
PL (1) PL294836A1 (en)
WO (1) WO1992005395A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110686462A (en) * 2019-10-08 2020-01-14 太仓陶氏电气有限公司 Adaptive ducted radiator and working method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016114466A1 (en) * 2016-08-04 2018-02-08 Eisenmann Se Conditioning device and method for conditioning a gaseous medium and system and method for treating workpieces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1398783A (en) * 1964-01-24 1965-05-14 Equip Thermiques Et De Recuper Process and devices for protecting the exchange surfaces of a heat exchanger and exchangers protected by this process
DE3534822A1 (en) * 1985-09-30 1987-04-16 Langbein & Engelbrecht Glass tube heat exchanger
US4840226A (en) * 1987-08-10 1989-06-20 The United States Of America As Represented By The United States Department Of Energy Corrosive resistant heat exchanger
DE3905140A1 (en) * 1989-02-20 1990-08-23 Dieter Dipl Ing Wallstein HEAT EXCHANGER
DE3909929C1 (en) * 1989-03-25 1990-05-31 Langbein & Engelbracht Gmbh & Co Kg, 4630 Bochum, De Glass tube heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110686462A (en) * 2019-10-08 2020-01-14 太仓陶氏电气有限公司 Adaptive ducted radiator and working method thereof

Also Published As

Publication number Publication date
ATE115715T1 (en) 1994-12-15
DE4030250A1 (en) 1992-03-26
CS152692A3 (en) 1992-12-16
HU9201740D0 (en) 1992-08-28
HUT61399A (en) 1992-12-28
PL294836A1 (en) 1992-11-16
WO1992005395A1 (en) 1992-04-02
EP0502158A1 (en) 1992-09-09
DE59103907D1 (en) 1995-01-26

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