EP0411112A1 - Heat exchanger. - Google Patents

Heat exchanger.

Info

Publication number
EP0411112A1
EP0411112A1 EP90904267A EP90904267A EP0411112A1 EP 0411112 A1 EP0411112 A1 EP 0411112A1 EP 90904267 A EP90904267 A EP 90904267A EP 90904267 A EP90904267 A EP 90904267A EP 0411112 A1 EP0411112 A1 EP 0411112A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
clean gas
flow channels
side walls
exchanger according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90904267A
Other languages
German (de)
French (fr)
Other versions
EP0411112B1 (en
Inventor
Dieter Wallstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WALLSTEIN Dieter
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0411112A1 publication Critical patent/EP0411112A1/en
Application granted granted Critical
Publication of EP0411112B1 publication Critical patent/EP0411112B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0008—Air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/006—Constructions of heat-exchange apparatus characterised by the selection of particular materials of glass

Definitions

  • the invention relates to a heat exchanger for cooling hot raw gas with aggressive constituents and for heating the raw gas purified to clean gas, the housing of which is formed by two side walls and an upper and lower tube bottom, the side walls being inside to form flow channels Partitions are assigned 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 and the housing and the partition walls preferably from highly corrosion-resistant sheets and the exchanger tubes are preferably made of glass, and such heat exchangers are used in particular in exhaust gas cleaning systems.
  • the The invention is based on the object of improving a heat exchanger of the generic type in such a way that the desired heating of the side walls and thus a reliable avoidance of corrosive condensations is ensured with comparatively little expenditure on equipment.
  • the clean gas outlet of the heat exchanger is connected to the flow channels of the two side walls via at least one clean gas line each.
  • the invention follows the guiding principle of leading clean gas heated up again by the heat exchanger through the flow channels along the side walls, i.e. Two partial flows are removed from the heated clean gas in the clean gas outlet of the heat exchanger and returned to the flow channels on the side walls.
  • the side walls and also their partitions used to form the flow channels are only exposed to clean gas, so that the risk of corrosion is definitely excluded.
  • the clean gas lines can open into the upper and / or lower areas of the flow channels, each in an adaptation to the existing conditions.
  • both in the upper a] s and in the Appropriate branch lines are provided in the lower region of the flow channels.
  • the clean gas lines are returned in the direction of the clean gas inlet of the heat exchanger, so that the branched clean gas flows flow through the flow channels in the same direction as the clean gas to be heated up the heat exchanger.
  • the flow channels are provided on the end face with outlet openings for the returned clean gas, so that this is added to the heated clean gas again at the outlet of the heat exchanger.
  • the mouthpieces of the clean gas lines on both sides can be different in cross-section and / or shape and / or position for the upper and / or lower regions of the flow channels, so that an optimal adaptation to the existing requirements can be made.
  • the flow channels advantageously extend over the entire depth of the side walls and their partitions, so that these are acted upon over the entire surface and thus a uniform temperature distribution is ensured.
  • a temperature detection element for example a temperature sensor.
  • the arrangement of such fans can be expedient if the power of the existing clean gas blower should not be sufficient for the return of the clean gas into the flow channels.
  • the clean gas lines with throttle valves or the like. be equipped.
  • Figure 1 is a partially sectioned view of a 2 shows a top view of FIG. 1 and FIG. 3 shows a side view of FIG. 1.
  • the housing of the heat exchanger is formed by the two side walls 3, which simultaneously represent the outer walls, and an upper and lower tube plate 8, 9.
  • the side walls 3 are assigned 14 partition walls 2 inside to form flow channels.
  • the ends of a multiplicity of exchanger tubes 1 arranged parallel to one another and to the side walls 3 are inserted in the upper and lower tube sheets 8, 9.
  • the hot raw gas flows through the exchanger tubes 1, while the cleaned clean gas flows through the housing of the heat exchanger transversely to the exchanger tubes 1.
  • the side walls 3 and the partitions 2 and the upper and lower tube sheets 8, 9 are preferably made of highly corrosion-resistant sheets, while the exchanger tubes 1 are preferably made of glass. However, it is also possible to manufacture them from graphite or plastic, for example.
  • the clean gas outlet of the heat exchanger is connected to the flow channels 14 of the two side walls 3 via at least one clean gas line 4 each. Part of the heated clean gas, which leaves the heat exchanger and is returned via the inlet openings 13 into the flow channels 14 between the side walls 3 and the partition walls 2, so that the side walls 3 and the partition walls are heated with a uniform temperature distribution.
  • the clean gas lines 4 open into the upper and lower regions of the flow channels 14, specifically the upper clean gas inlet into the flow channels 14 is designated by 12 and the lower clean gas inlet is designated by 11.
  • the flow channels 14 have outlet openings 10 for the returned clean gas on the end face, so that this is introduced again into the clean gas outlet of the heat exchanger and is discharged with the main stream of the clean gas, for example to a chimney.
  • the flow channels 14 for the branched-off clean gas extend over the entire depth of the side walls 3 and their partitions 2, so that full-surface application and thus uniform temperature distribution is ensured.
  • Heaters 5 are present in the clean gas lines 4, so that the two branched clean gas streams are reheated, if necessary, can.
  • the control is advantageously carried out via temperature detection elements 7, for example in the form of temperature sensors.
  • fans 6 can be arranged in the clean gas lines 4, which can advantageously be regulated depending on the need for volume and pressure.
  • the fans 6 can be dispensed with if the power of the existing clean gas blower is sufficient to also convey the two branched clean gas streams through the flow channels 14 via the clean gas lines 4.
  • Throttle valves 15 or the like are in the clean gas lines 4. provided so that control of the returned clean gas flows can be carried out.

Landscapes

  • 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)

Abstract

A heat exchanger for cooling hot raw gas with aggressive constituents and for heating the pure gas obtained by purification of the raw gas comprises a housing with two side walls and an upper and a lower tubesheet. The inner side walls are associated with partitions to form flow channels. The ends of a plurality of exchanger tubes parallel to each other and to the side walls are inserted in the upper and lower tubesheets. The hot raw gas flows through the exchanger tubes and the pure gas flows through the housing perpendicular to the exchanger tubes. The housing and the partitions are made preferably of highly corrosion-resistant sheet metal and the exchanger tubes are made preferably of glass. To improve this type of heat exchanger so as to obtain the desired heating of the side walls and hence prevent corrosive condensation, with a relatively simple structure, the pure gas outlet from the heat exchanger communicates through at least one pure gas duct (4) with the flow channels (4) of the two side walls (3). The pure gas ducts (4) open into the upper and/or lower regions of the flow channels (14). The flow channels (14) have front outlet orifices (10) for the recycled pure gas.

Description

"Wärmetauscher1 "Heat exchanger 1
Die Erfindung betrifft einen Wärmetauscher zur Kühlung von heißem Rohgas mit aggressiven Bestandteilen und zur Erwär¬ mung des zu Reingas gereinigten Rohgases, dessen Gehäuse von zwei Seitenwänden und einem oberen und unteren Rohrbo¬ den gebildet ist, wobei den Seitenwänden innen zur Bil¬ dung von Strömungskanälen Trennwände zugeordnet sind und in den oberen und unteren Rohrboden 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 und das Gehäuse sowie die Trennwände vorzugsweise aus hochkorrosionsfesten Blechen und die Tauscherrohre vor¬ zugsweise aus Glas hergestellt sind. Derartige Wärme¬ tauscher finden insbesondere in Abgas-Reinigungsanlagen Verwendung.The invention relates to a heat exchanger for cooling hot raw gas with aggressive constituents and for heating the raw gas purified to clean gas, the housing of which is formed by two side walls and an upper and lower tube bottom, the side walls being inside to form flow channels Partitions are assigned 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 and the housing and the partition walls preferably from highly corrosion-resistant sheets and the exchanger tubes are preferably made of glass, and such heat exchangers are used in particular in exhaust gas cleaning systems.
Durch die DE-31 42 485-C2 ist ein Glasrohrwärmetau- scher vorgenannter Art bekannt, bei dem an den Seiten¬ wänden Strömungskanäle ausgebildet sind, die zur Er¬ wärmung dieser Wände und damit zur Vermeidung von korrodierenden Kondensationen von heißem Rauchgas durchströmt sind. Der angestrebte Zweck wird mit dem bekannten Glasrohrwärmetauscher jedoch nicht mit Sicher¬ heit erreicht, da sich das heiße Rauchgas in den Strö¬ mungskanälen oftmals soweit abkühlt, daß Säurepunktunter- schreitungen eintreten und dadurch Korrosionen infolge der aggressiven Bestandteile des Rauchgases wirksam wer¬ den.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, which are used to heat these walls and thus to avoid corrosive condensation of hot flue gas are flowed through. The intended purpose is not achieved with the known glass tube heat exchanger, however, since the hot flue gas in the flow channels often cools to such an extent that the acid point is undershot and, as a result, corrosion due to the aggressive constituents of the flue gas becomes effective.
Um diese Nachteile zu beheben, ist es durch die DE-33 33 057-C1 bekannt, einen Glasrohrwärmetauscher der hier in Rede stehenden Art dahingehend zu verbessern, daß die Erwärmung der Seitenwände nicht unmittelbar durch Ein¬ leitung des heißen Rauchgases in deren Strömungskanäle erfolgt, sondern mittelbar mit Hilfe von reiner Umgebungsluft, welche jedoch zuvor vom heißen Rauchgas in einem weite¬ ren Wärmetauscher aufgeheizt wird, der in den Strömungs¬ kanälen an den Seitenwänden ausgebildet ist. Auch bei dieser bekannten Ausführung eines Wärmetauschers können bei niedrigen Rauchgastemperaturen ebenfalls Taupunkt- unterschreitungen in den Tauscherrohren der Wärmetau¬ scher in den Strömungskanälen auftreten, ganz abgesehen davon, daß in diesen die anzustrebende gleichmäßige Temperaturverteilung nicht erreichbar ist.In order to overcome these disadvantages, it is known from DE-33 33 057-C1 to improve a glass tube heat exchanger of the type in question in such a way that the side walls are not heated 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 undershoots in the exchanger tubes of the heat exchangers in the flow channels can also occur 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 Er- findung die Aufgabe zugrunde, einen Wärmetauscher der gattungsgemäßen Art dahingehend zu verbessern, daß bei diesem die angestrebte Erwärmung der Seitenwände und damit eine sichere Vermeidung von korrodierenden Kon¬ densationen mit vergleichsweise geringem apparativen Aufwand gewährleistet ist.Based on this state of the art, the The invention is based on the object of improving a heat exchanger of the generic type in such a way that the desired heating of the side walls and thus a reliable avoidance of corrosive condensations is ensured with comparatively little expenditure on equipment.
Erfindungsgemäß wird dies dadurch erreicht, daß der Reingasaustritt des Wärmetauschers über mindestens je eine Reingasleitung mit den Strömungskanälen der beiden Seitenwände in Verbindung steht. Die Erfindung folgt dem Leitgedanken, durch den Wärmetauscher wieder aufge¬ heiztes Reingas durch die Strömungskanäle entlang den Seitenwänden zu führen, d.h. dem erwärmten Reingas werden im Reingasaustritt des Wärmetauschers zwei Teilströme ent¬ nommen und in die Strömungskanäle an den Seitenwänden zurückgeführt. Somit werden die Seitenwähde und auch deren zur Bildung der Strömungskanäle verwendeten Trennwände aus¬ schließlich mit Reingas beaufschlagt, so daß die Gefahr der Ausbildung von Korrosionen mit Sicherheit ausgeschlossen ist,This is achieved according to the invention in that the clean gas outlet of the heat exchanger is connected to the flow channels of the two side walls via at least one clean gas line each. The invention follows the guiding principle of leading clean gas heated up again by the heat exchanger through the flow channels along the side walls, i.e. Two partial flows are removed from the heated clean gas in the clean gas outlet of the heat exchanger and returned to the flow channels on the side walls. Thus, the side walls and also their partitions used to form the flow channels are only exposed to clean gas, so that the risk of corrosion is definitely excluded.
Die Reingasleitungen können in die oberen und/oder unte¬ ren Bereiche der Strömungskanäle einmünden, und zwar jeweils in Anpassung an die vorhandenen Gegebenheiten. Im Falle einer Einmündung sowohl im oberen a] s auch im _ 4_ unteren Bereich der Strömungskanäle sind entsprechende Abzweigleitungen vorgesehen. Die Reingasleitungen sind in Richtung auf den Reingaseintritt des Wärmetauschers rückgeführt, so daß die Strömungskanäle in der gleichen Richtung von den abgezweigten Reingasströmen durchströmt werden, wie der Wärmetauscher von dem zu erwärmenden Rein¬ gas. Um den Austritt des rückgeführten Reingases zu ermög¬ lichen, sind die Strömungskanäle stirnseitig mit Aus¬ trittsöffnungen für das rückgeführte Reingas versehen, so daß dieses dem erwärmten Reingas im Austritt des Wärmetauschers wieder zugesetzt wird.The clean gas lines can open into the upper and / or lower areas of the flow channels, each in an adaptation to the existing conditions. In the case of a confluence both in the upper a] s and in the Appropriate branch lines are provided in the lower region of the flow channels. The clean gas lines are returned in the direction of the clean gas inlet of the heat exchanger, so that the branched clean gas flows flow through the flow channels in the same direction as the clean gas to be heated up the heat exchanger. In order to allow the return of the recycled clean gas, the flow channels are provided on the end face with outlet openings for the returned clean gas, so that this is added to the heated clean gas again at the outlet of the heat exchanger.
Die Mündungsstücke der Reingasleitungen beider Seiten können für die oberen und/oder unteren Bereiche der Strö¬ mungskanäle in Querschnitt und/oder Form und/oder Lage unterschiedlich sein , so daß eine optimale Anpassung an die bestehenden Erfordernisse vorgenommen werden kann.The mouthpieces of the clean gas lines on both sides can be different in cross-section and / or shape and / or position for the upper and / or lower regions of the flow channels, so that an optimal adaptation to the existing requirements can be made.
Vorteilhaft erstrecken sich die Strömungskanäle über die gesamte Tiefe der Seitenwände und deren Trennwände, so daß diese vollflächig beaufschlagt sind und damit eine gleichmäßige Temperaturverteilung gewährleistet ist.The flow channels advantageously extend over the entire depth of the side walls and their partitions, so that these are acted upon over the entire surface and thus a uniform temperature distribution is ensured.
Gemäß einem weiteren Merkmal der Erfindung kann in den Reingasleitungen je ein Erhitzer vorhanden sein, um ggf. eine Zwischenerhitzung des rückgeführten Reinga¬ ses durchzuführen, je nachdem falls sich dieses aufgrund der örtlichen Gegebenheiten als zweckmäßig erweisen sollte. In diesem Falle ist es vorteilhaft, die Erhitzer über ein Temperaturerfassungsglied, beispielsweise einen Tempera.- turfühler, zu steuern.According to a further feature of the invention, in the clean gas lines each have a heater in order to possibly reheat the recirculated clean gas, if this should prove to be expedient due to the local conditions. In this case, it is advantageous to control the heaters via a temperature detection element, for example a temperature sensor.
Nach einem weiteren Vorschlag der Erfindung kann in den Reingasleitungen auch je ein Ventilator vorhanden sein, welche vorteilhaft in Abhängigkeit vom Bedarf nach Volumen und Druck regelbar sind. Die Anordnung derartiger Ventilatoren kann dann zweckmäßig sein, wenn die Leistung des vorhandenen Reingasgebläses nicht für die Rück¬ führung des Reingases in die Strömungskanäle ausreichend sein sollte.According to a further proposal of the invention, there may also be a fan in each of the clean gas lines, which can advantageously be regulated depending on the need for volume and pressure. The arrangement of such fans can be expedient if the power of the existing clean gas blower should not be sufficient for the return of the clean gas into the flow channels.
Zur Regelung des rückgeführten Reingasstromes können die Reingasleitungen mit Drosselklappen od.dgl. ausgerüstet sein.To control the returned clean gas flow, the clean gas lines with throttle valves or the like. be equipped.
Ein Ausführungsbeispiel der Erfindung ist anhand der Zeichnung näher erläutert, und zwar zeigt:An embodiment of the invention is explained in more detail with reference to the drawing, which shows:
Figur 1 eine teilweise geschnittene Ansicht eines Wärmetauschers, Figur 2 eine Draufsicht der Figur 1 und Figur 3 eine Seitenansicht der Figur 1.Figure 1 is a partially sectioned view of a 2 shows a top view of FIG. 1 and FIG. 3 shows a side view of FIG. 1.
Das Gehäuse des Wärmetauschers ist von den beiden Seiten¬ wänden 3, welche gleichzeitig die Außenwände darstellen, und einem oberen und unteren Rohrboden 8,9 gebildet. Den Seitenwänden 3 sind innen zur Bildung von Strömungskanälen 14 Trennwände 2 zugeordnet. In den oberen und unteren Rohrbo¬ den 8,9 sind die Enden einer Vielzahl von parallel zuein¬ ander und zu den Seitenwänden 3 angeordneten Tauscherroh¬ ren 1 eingesetzt. Das heiße Rohgas durchströmt die Tauscher¬ rohre 1, während das gereinigte Reingas das Gehäuse des Wärmetauschers quer zu den Tauscherrohren 1 durchströmt. Die Seitenwände 3 sowie die Trennwände 2 und der obere und der untere Rohrboden 8,9 bestehen vorzugsweise aus hoch¬ korrosionsfesten Blechen, während die Tauscherrohre 1 vorzugsweise aus Glas hergestellt sind. Es ist jedoch auch möglich, diese beispielsweise aus Graphit oder Kunststoff zu fertigen.The housing of the heat exchanger is formed by the two side walls 3, which simultaneously represent the outer walls, and an upper and lower tube plate 8, 9. The side walls 3 are assigned 14 partition walls 2 inside to form flow channels. The ends of a multiplicity of exchanger tubes 1 arranged parallel to one another and to the side walls 3 are inserted in the upper and lower tube sheets 8, 9. The hot raw gas flows through the exchanger tubes 1, while the cleaned clean gas flows through the housing of the heat exchanger transversely to the exchanger tubes 1. The side walls 3 and the partitions 2 and the upper and lower tube sheets 8, 9 are preferably made of highly corrosion-resistant sheets, while the exchanger tubes 1 are preferably made of glass. However, it is also possible to manufacture them from graphite or plastic, for example.
Der Reingasaustritt des Wärmetauschers steht über min¬ destens je eine Reingasleitung 4 mit den Strömungskanälen 14 der beiden Seitenwände 3 in Verbindung. Über diese Rein¬ gasleitungen 4 wird ein Teil des erwärmten Reingases, welches den Wärmetauscher verläßt, über deren Eintritts¬ öffnungen 13 in die Strömungskanäle 14 zwischen den Seiten¬ wänden 3 und den Trennwänden 2 rückgeführt, so daß die Seitenwände 3 und die Trennwände eine Erwärmung mit gleich¬ mäßiger Temperaturverteilung erfahren.The clean gas outlet of the heat exchanger is connected to the flow channels 14 of the two side walls 3 via at least one clean gas line 4 each. Part of the heated clean gas, which leaves the heat exchanger and is returned via the inlet openings 13 into the flow channels 14 between the side walls 3 and the partition walls 2, so that the side walls 3 and the partition walls are heated with a uniform temperature distribution.
Die Reingasleitungen 4 münden in die oberen und unteren Bereiche der Strömungskanäle 14 ein, und zwar ist der obere Reingaseintritt in die Strömungskanäle 14 mit 12 und der- untere Reingaseintritt mit 11 bezeichnet. Die Strömungs¬ kanäle 14 weisen stirnseitig Austrittsöffnungen 10 für das zurückgeführte Reingas auf, so daß dieses wieder in den Reingasaustritt des Wärmeaustauschers eingeleitet und mit dem Hauptstrom des Reingases, beispielsweise zu einem Kamin, abgeleitet wird.The clean gas lines 4 open into the upper and lower regions of the flow channels 14, specifically the upper clean gas inlet into the flow channels 14 is designated by 12 and the lower clean gas inlet is designated by 11. The flow channels 14 have outlet openings 10 for the returned clean gas on the end face, so that this is introduced again into the clean gas outlet of the heat exchanger and is discharged with the main stream of the clean gas, for example to a chimney.
Die Strömungskanäle 14 für das abgezweigte Reingas er¬ strecken sich über die gesamte Tiefe der Seitenwände 3 und deren Trennwände 2, so daß eine vollfläohige Beaufschla¬ gung und damit gleichmäßige Temperaturverteiung gewähr¬ leistet ist.The flow channels 14 for the branched-off clean gas extend over the entire depth of the side walls 3 and their partitions 2, so that full-surface application and thus uniform temperature distribution is ensured.
In den Reingasleitungen 4 sind Erhitzer 5 vorhanden, so daß eine Zwischenerhitzung der beiden abgezweigten Reingasströme -falls erforderlich- vorgenommen werden - kann. In diesem Falle erfolgt die Steuerung vorteilhaft über Temperaturerfassungsglieder 7, beispielsweise in Form von Temperaturfühlern.Heaters 5 are present in the clean gas lines 4, so that the two branched clean gas streams are reheated, if necessary, can. In this case, the control is advantageously carried out via temperature detection elements 7, for example in the form of temperature sensors.
In den Reingasleitungen 4 können weiterhin Ventilatoren 6 angeordnet sein, welche vorteilhaft in Abhängigkeit vom Bedarf nach Volumen und Druck regelbar sind. Auf die Ventilatoren 6 kann dann verzichtet werden, wenn die Leistung des vorhandenen Reingasgebläses ausreicht, um auch die beiden abgezweigten Reingasströme über die Reingasleitungen 4 durch die Strömungskanäle 14 hindurch- zufördern.Furthermore, fans 6 can be arranged in the clean gas lines 4, which can advantageously be regulated depending on the need for volume and pressure. The fans 6 can be dispensed with if the power of the existing clean gas blower is sufficient to also convey the two branched clean gas streams through the flow channels 14 via the clean gas lines 4.
In den Reingasleitungen 4 sind Drosselklappen 15 od.dgl. vorgesehen, so daß eine Steuerung der zurückgeführten Reingasströme durchgeführt werden können.Throttle valves 15 or the like are in the clean gas lines 4. provided so that control of the returned clean gas flows can be carried out.
Durch die erfindungsgemäße Ausführung eines Wärmetau¬ schers wird zur Beheizung der Trennwände 2 und der Seitenwände 3 nicht mehr, wie nach dem Stand der Tech¬ nik, das sehr aggressive und verschmutzte Rohgas verwen¬ det, sondern das gereinigte, von aggressiven Bestandteilen befreite und bereits aufgeheizte Reingas.The inventive design of a heat exchanger no longer uses the very aggressive and contaminated raw gas for heating the partition walls 2 and the side walls 3, as in the prior art, but rather the cleaned, freed from aggressive constituents and already heated clean gas.
Auf diese Weise wird erreicht, daß auch bei partieller Taupunktsunterschreitung die anfallende Säure erheb¬ lich schwächer und damit weit weniger aggressiv ist, als bei den bekannten Ausführungen. In this way it is achieved that even with partial If the acid falls below the dew point, it is considerably weaker and therefore far less aggressive than in the known designs.

Claims

P A T E N T A N S P R Ü C H EP A T E N T A N S P R Ü C H E
] . 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 ge¬ bildet ist, wobei den Seitenwänden innen zur Bildung von Strömungskanälen Trennwände zugeordnet sind und in den oberen und unteren Rohrboden die Enden einer Vielzahl von parallel zueinander und zu den Seiten¬ wänden angeordneten Tauscherrohren eingesetzt sind und das heiße Rohgas die Tauscherrohre und das Reingas das Gehäuse quer zu den Tauscherroh¬ ren durchströmt und das Gehäuse sowie die Trennwände vorzugsweise aus hochkorrosionsfesten Blechen und die Tauscherrohre vorzugsweise aus Glas hergestellt sind, dadurch gekennzeichnet, daß der Reingasaus- tritt des Wärmetauschers über mindestens je eine Rein¬ ] . 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, with the side walls being assigned inside to form flow channels and in the upper and lower tube plate, 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 and the housing and the partition walls are preferably made of highly corrosion-resistant metal sheets and the exchanger tubes are preferably made of glass, characterized in that the clean gas outlet the heat exchanger passes over at least one Rein¬
* gasleitung (4) mit den Strömungskanälen (14) der beiden Seitenwände (3) in Verbindung steht.* Gas line (4) with the flow channels (14) of the two side walls (3) is connected.
2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß die Reingasleitungen (4) in die oberen und/oder unte¬ ren Bereiche der Strömungskanäle (14) einmünden.2. Heat exchanger according to claim 1, characterized in that the clean gas lines (4) open into the upper and / or lower regions of the flow channels (14).
3. Wärmetauscher nach Anspruch 1 oder 2, dadurch gekenn¬ zeichnet, daß die Strömungskanäle (14) stirnseitig Aus¬ trittsöffnungen (10) für das rückgeführte Reingas aufwei¬ sen.3. Heat exchanger according to claim 1 or 2, characterized gekenn¬ characterized in that the flow channels (14) on the front outlet openings (10) for the recirculated clean gas.
4. Wärmetauscher nach Anspruch 1 oder einem der vorher¬ gehenden, dadurch gekennzeichnet, daß die Mündungsstücke der Reingasleitungen (4) beider Seiten für die oberen und/ oder unteren Bereiche der Strömungskanäle ( 1 4 ) in Quer¬ schnitt und/oder Form und/oder Lage unterschiedlich sind.4. Heat exchanger according to claim 1 or one of the preceding, characterized in that the mouthpieces of the clean gas lines (4) on both sides for the upper and / or lower regions of the flow channels (1 4) in cross-section and / or shape and / or location are different.
5. Wärmetauscher nach Anspruch 1 oder einem der vorher¬ gehenden, dadurch gekennzeichnet, daß sich die Strömungs¬ kanäle (14) über die gesamte Tiefe der Seitenwände (3) und deren Trennwände (2) erstrecken.5. Heat exchanger according to claim 1 or one of the preceding ones, characterized in that the flow channels (14) extend over the entire depth of the side walls (3) and their partitions (2).
6. Wärmetauscher nach Anspruch 1 oder einem der vorher- gehenden, dadurch gekennzeichnet, daß in den Reingas¬ leitungen (4) Erhitzer (5) vorhanden sind.6. Heat exchanger according to claim 1 or one of the previously going, characterized in that in the clean gas lines (4) there are heaters (5).
7. Wärmetauscher nach Anspruch 1 oder einem der vorher¬ gehenden, dadurch gekennzeichnet, daß die Erhitzer (5) über Temperaturerfassungsglieder (7) steuerbar sind.7. Heat exchanger according to claim 1 or one of the preceding, characterized in that the heater (5) via temperature detection elements (7) are controllable.
8. Wärmetauscher nach Anspruch ] oder einem der vorher¬ gehenden, dadurch gekennzeichnet, daß in den Reingas¬ leitungen (4) Ventilatoren (6) vorgesehen sind.8. Heat exchanger according to claim] or one of the preceding, characterized in that in the clean gas lines (4) fans (6) are provided.
9. Wärmetauscher nach Anspruch 1 oder einem der vorher¬ gehenden, dadurch gekennzeichnet, daß die Ventilatoren (6) in Abhängigkeit vom Bedarf nach Volumen und Druck regel¬ bar sind.9. Heat exchanger according to claim 1 or one of the preceding ones, characterized in that the fans (6) are regulatable depending on the need for volume and pressure.
10.. Wärmetauscher nach Anspruch 1 oder einem der vorher¬ gehenden, dadurch gekennzeichnet, daß die Reingasleitungen (4) mit Drosselklappen (15) od.dgl. ausgerüstet sind. 10 .. Heat exchanger according to claim 1 or one of the preceding, characterized in that the clean gas lines (4) with throttle valves (15) or the like. are equipped.
EP90904267A 1989-02-20 1990-02-19 Heat exchanger Expired - Lifetime EP0411112B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3905140A DE3905140A1 (en) 1989-02-20 1989-02-20 HEAT EXCHANGER
DE3905140 1989-02-20
PCT/EP1990/000267 WO1990009555A1 (en) 1989-02-20 1990-02-19 Heat exchanger

Publications (2)

Publication Number Publication Date
EP0411112A1 true EP0411112A1 (en) 1991-02-06
EP0411112B1 EP0411112B1 (en) 1994-06-15

Family

ID=6374505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90904267A Expired - Lifetime EP0411112B1 (en) 1989-02-20 1990-02-19 Heat exchanger

Country Status (4)

Country Link
EP (1) EP0411112B1 (en)
AT (1) ATE107409T1 (en)
DE (2) DE3905140A1 (en)
WO (1) WO1990009555A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4030250A1 (en) * 1990-09-25 1992-03-26 Dieter Dipl Ing Wallstein HEAT EXCHANGER
FR2702831B1 (en) * 1993-03-17 1995-05-24 Faudat Method and device for cooling the enclosure of a heat exchanger.
CN112728974A (en) * 2021-01-04 2021-04-30 洛阳瑞昌环境工程有限公司 Glass tube heat exchanger capable of preventing dust deposition and blocking and application thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE315672C (en) *
GB495093A (en) * 1936-03-23 1938-11-04 Hugh Harford Improvements in gas fired geyser type water heaters
IT1210975B (en) * 1981-01-12 1989-09-29 Luigi Benito Trojani HEAT RECOVERY AIR, HEAT RECOVERY, FROM EXHAUST FUMES IN FIREPLACES AND SIMILAR.
DE3142485C2 (en) * 1981-10-27 1983-11-17 Langbein & Engelbracht GmbH & Co KG, 4630 Bochum Glass tube heat exchanger
DE3333057C1 (en) * 1983-09-14 1985-04-18 Peter Kaehmann Glass tube heat exchanger
DE3534822A1 (en) * 1985-09-30 1987-04-16 Langbein & Engelbrecht Glass tube heat exchanger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9009555A1 *

Also Published As

Publication number Publication date
WO1990009555A1 (en) 1990-08-23
ATE107409T1 (en) 1994-07-15
DE59006114D1 (en) 1994-07-21
DE3905140A1 (en) 1990-08-23
EP0411112B1 (en) 1994-06-15

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