EP0411112B1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- EP0411112B1 EP0411112B1 EP90904267A EP90904267A EP0411112B1 EP 0411112 B1 EP0411112 B1 EP 0411112B1 EP 90904267 A EP90904267 A EP 90904267A EP 90904267 A EP90904267 A EP 90904267A EP 0411112 B1 EP0411112 B1 EP 0411112B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- clean gas
- side walls
- exchanger according
- flow channels
- 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.)
- Expired - Lifetime
Links
- 238000005192 partition Methods 0.000 claims abstract description 14
- 239000011521 glass Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 230000007797 corrosion Effects 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 239000000470 constituent Substances 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 55
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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 cleaned to clean gas
- the housing of which is formed by two side walls and an upper and a lower tube sheet, the side walls being assigned inside to form flow channels and in the ends of a multiplicity of exchanger tubes arranged parallel to one another and to the side walls are inserted in the upper and lower tube sheets, 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 preferred are made of glass.
- Such heat exchangers are used in particular in exhaust gas cleaning systems.
- DE-A-35 34 822 shows a glass tube heat exchanger in which the regions of the clean gas duct which are adjacent to the side walls are acted upon by a heated liquid heat transfer medium.
- an external heating device is used in the start-up phase of the heat exchanger, a circuit of the liquid heat transfer medium being maintained by means of a pump.
- the liquid heat transfer medium can also be heated by the flue gas which flows through tubes which are arranged areas of the clean gas duct assigned to the side walls.
- the additional liquid heat transfer medium results in a comparatively complicated apparatus structure for the glass tube heat exchanger described above.
- the invention has for its object to improve a heat exchanger of the generic type in such a way that the desired heating of the side walls and thus a safe avoidance of corrosive condensations is ensured with comparatively little 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 at the level of the clean gas inlet into the heat exchanger.
- 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, ie 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 become exclusive charged with clean gas, so that the risk of corrosion is reduced or eliminated in comparison to technical solutions in which these flow channels are exposed to flue gas or raw gas.
- the clean gas lines can open into the upper and / or lower areas of the flow channels, in each case in adaptation to the existing conditions.
- corresponding branch lines are provided in the case of a junction both in the upper and in the lower area 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.
- 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.
- the heaters may be one heater in each of the clean gas lines in order to possibly reheat the recycled clean gas, depending on whether this should prove expedient due to the local conditions.
- a temperature detection element for example a temperature sensor.
- a fan can also be present in 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 performance 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.
- 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 14 are assigned inside to form flow channels 14 partition walls 2.
- the ends of a multiplicity of exchanger tubes 1 arranged parallel to one another and to the side walls 3 are inserted into 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 transverse 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 is returned via its 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 denoted by 12 and the lower clean gas inlet is denoted 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 a full-surface exposure and thus uniform temperature distribution is ensured.
- Heaters 5 are present in the clean gas lines 4, so that intermediate heating of the two branched clean gas streams can be carried out if necessary.
- the control is advantageously carried out via temperature detection elements 7, for example in Form of temperature sensors.
- Fans 6 can also be arranged in the clean gas lines 4, which fans 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.
- the inventive design of a heat exchanger is no longer used to heat the partition walls 2 and the side walls 3, as in the prior art, the very aggressive and contaminated raw gas, but the cleaned, cleaned from aggressive components and already heated clean gas.
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
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 einem unteren Rohrboden gebildet ist, wobei den Seitenwänden innen zur Bildung von Strömungskanälen 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 und das Gehäuse sowie die Trennwände vorzugsweise aus hochkorrosionsfesten Blechen und die Tauscherrohre vorzugsweise aus Glas hergestellt sind. Derartige Wärmetauscher 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 cleaned to clean gas, the housing of which is formed by two side walls and an upper and a lower tube sheet, the side walls being assigned inside to form flow channels and in the ends of a multiplicity of exchanger tubes arranged parallel to one another and to the side walls are inserted in the upper and lower tube sheets, 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 preferred are made of glass. Such heat exchangers are used in particular in exhaust gas cleaning systems.
Durch die DE-C-31 42 485 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 Zweck 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-C-31 42 485 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 certainty with the known glass tube heat exchanger, since the hot flue gas is in the flow channels often cools down enough so that the acid point falls below the limit and this causes corrosion due to the aggressive components of the flue gas.
Um diese Nachteile zu beheben, ist es durch die DE-C-33 33 057 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 vom 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.In order to remedy these disadvantages, it is known from DE-C-33 33 057 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. Also 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.
Die DE-A-35 34 822 zeigt einen Glasrohrwärmetauscher, bei dem die den Seitenwänden benachbarten Bereiche des Reingaskanals mit einem erwärmten flüssigen Wärmeträger beaufschlagt werden. Zur Erhitzung dieses Wärmeträgers wird in der Anlaufphase des Wärmetauschers eine externe Heizeinrichtung verwendet, wobei ein Kreislauf des flüssigen Wärmeträgers mittels einer Pumpe aufrecht erhalten wird. Bei im Normalbetrieb befindlichem Wärmetauscher kann der flüssige Wärmeträger auch durch das Rauchgas erwärmt werden, welches Rohre durchströmt, die den Seitenwänden zugeordneten Bereiche des Reingaskanals angeordnet sind. Aufgrund des zusätzlichen flüssigen Wärmeträgers ergibt sich ein vergleichsweise komplizierter apparativer Aufbau des vorstehend geschilderten Glasrohrwärmetauschers.DE-A-35 34 822 shows a glass tube heat exchanger in which the regions of the clean gas duct which are adjacent to the side walls are acted upon by a heated liquid heat transfer medium. To heat this heat transfer medium, an external heating device is used in the start-up phase of the heat exchanger, a circuit of the liquid heat transfer medium being maintained by means of a pump. In normal operation located heat exchanger, the liquid heat transfer medium can also be heated by the flue gas which flows through tubes which are arranged areas of the clean gas duct assigned to the side walls. The additional liquid heat transfer medium results in a comparatively complicated apparatus structure for the glass tube heat exchanger described above.
Von diesem Stand der Technik ausgehend, liegt der Erfindung 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 Kondensationen mit vergleichsweise geringem apparativen Aufwand gewährleistet ist.Starting from this prior art, the invention has for its object to improve a heat exchanger of the generic type in such a way that the desired heating of the side walls and thus a safe avoidance of corrosive condensations is ensured with comparatively little equipment.
Erfindungsgemäß wird dies dadurch erreicht, daß der Reingasaustritt des Wärmetauschers über mindestens je eine Reingasleitung in Höhe des Reingaseintritts in den Wärmetauscher mit den Strömungskanälen der beiden Seitenwände in Verbindung steht. Die Erfindung folgt dem Leitgedanken, durch den Wärmetauscher wieder aufgeheiztes Reingas durch die Strömungskanäle entlang den Seitenwänden zu führen, d.h. dem erwärmten Reingas werden im Reingasaustritt des Wärmetauschers zwei Teilströme entnommen und in die Strömungskanäle an den Seitenwänden zurückgeführt. Somit werden die Seitenwände und auch deren zur Bildung der Strömungskanäle verwendeten Trennwände ausschließlich mit Reingas beaufschlagt, so daß die Gefahr der Ausbildung von Korrosionen im Vergleich zu technischen Lösungen, bei denen diese Strömungskanäle mit Rauch- bzw. Rohgas beaufschlagt werden, reduziert bzw. ausgeschlossen ist.According to the invention, this is achieved 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 at the level of the clean gas inlet into the heat exchanger. 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, ie 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 become exclusive charged with clean gas, so that the risk of corrosion is reduced or eliminated in comparison to technical solutions in which these flow channels are exposed to flue gas or raw gas.
Die Reingasleitungen können in die oberen und/oder unteren Bereiche der Strömungskanäle einmünden, und zwar jeweils in Anpassung an die vorhandenen Gegebenheiten. Im Falle einer Einmündung sowohl im oberen als auch im 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 Reingas. Um den Austritt des rückgeführten Reingases zu ermöglichen, sind die Strömungskanäle stirnseitig mit Austrittsöffnungen 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, in each case in adaptation to the existing conditions. In the case of a junction both in the upper and in the lower area of the flow channels, corresponding branch lines are provided. 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. In order to enable 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 Strömungskanäle 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 einer Weiterbildung der Erfindung kann in den Reingasleitungen je ein Erhitzer vorhanden sein, um ggf. eine Zwischenerhitzung des rückgeführten Reingases 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 Temperaturfühler, zu steuern.According to a development of the invention, there may be one heater in each of the clean gas lines in order to possibly reheat the recycled clean gas, depending on whether this should prove 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 einer weiteren Ausbildung 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 Rückführung des Reingases in die Strömungskanäle ausreichend sein sollte.According to a further embodiment of the invention, a fan can also be present in 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 performance 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:
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
- a partially sectioned view of a heat exchanger,
- Figure 2
- a plan view of Figure 1 and
- Figure 3
- 2 shows a side view of FIG. 1.
Das Gehäuse des Wärmetauschers ist von den beiden Seitenwänden 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 Rohrboden 8,9 sind die Enden einer Vielzahl von parallel zueinander und zu den Seitenwänden 3 angeordneten Tauscherrohren 1 eingesetzt. Das heiße Rohgas durchströmt die Tauscherrohre 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 hochkorrosionsfesten 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
Der Reingasaustritt des Wärmetauschers steht über mindestens je eine Reingasleitung 4 mit den Strömungskanälen 14 der beiden Seitenwände 3 in Verbindung. Über diese Reingasleitungen 4 wird ein Teil des erwärmten Reingases, welches den Wärmetauscher verläßt, über deren Eintrittsöffnungen 13 in die Strömungskanäle 14 zwischen den Seitenwänden 3 und den Trennwänden 2 rückgeführt, so daß die Seitenwände 3 und die Trennwände eine Erwärmung mit gleichmäßiger Temperaturverteilung erfahren.The clean gas outlet of the heat exchanger is connected to the
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 Strömungskanäle 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
Die Strömungskanäle 14 für das abgezweigte Reingas erstrecken sich über die gesamte Tiefe der Seitenwände 3 und deren Trennwände 2, so daß eine vollflächige Beaufschlagung und damit gleichmäßige Temperaturverteiung gewährleistet ist.The
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.
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 hindurchzufördern.
In den Reingasleitungen 4 sind Drosselklappen 15 od.dgl. vorgesehen, so daß eine Steuerung der zurückgeführten Reingasströme durchgeführt werden können.
Durch die erfindungsgemäße Ausführung eines Wärmetauschers wird zur Beheizung der Trennwände 2 und der Seitenwände 3 nicht mehr, wie nach dem Stand der Technik, das sehr aggressive und verschmutzte Rohgas verwendet, sondern das gereinigte, von aggressiven Bestandteilen befreite und bereits aufgeheizte Reingas.The inventive design of a heat exchanger is no longer used to heat the
Auf diese Weise wird erreicht, daß auch bei partieller Taupunktsunterschreitung die anfallende Säure erheblich schwächer und damit weit weniger aggressiv ist, als bei den bekannten Ausführungen.In this way it is achieved that even if the temperature falls below the dew point, the acid is considerably weaker and thus much less aggressive than in the known designs.
Claims (10)
- 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 is formed by two side walls (3) and an upper (8) and a lower tubular base (9), partitions (2) being associated with the side walls (3) on the interior to form flow ducts (14), and the ends of a plurality of exchanger tubes (1) disposed parallel to one another and to the side walls (3) being inserted in the upper (8) and lower tubular bases (9), and the hot crude gas flowing through the exchanger tubes (1) and the clean gas flowing through the housing transversely to the exchanger tubes (1), and the housing and the partitions (2) preferably being produced from highly corrosion-resistant metal sheets and the exchanger tubes (1) preferably being produced from glass, characterised in that the clean gas outlet of the heat exchanger is connected to the flow ducts (14) of the two side walls (3) via at least one clean gas pipe (4) at the level of the clean gas inlet into the heat exchanger.
- Heat exchanger according to Claim 1, characterised in that the clean gas pipes (4) open into the upper and/or lower regions of the flow ducts (14).
- Heat exchanger according to Claim 1 or 2, characterised in that the flow ducts (14) comprise outlet openings (10) at the end face for the returned clean gas.
- Heat exchanger according to Claim 1 or any one of the preceding claims, characterised in that the mouth pieces of the clean gas pipes (4) of both sides are different for the upper and/or lower regions of the flow ducts (14) with respect to the cross-section and/or shape and/or position.
- Heat-exchanger according to Claim 1 or any one of the preceding claims, characterised in that the flow ducts (14) extend over the entire height of the side walls (3) and their partitions (2).
- Heat exchanger according to Claim 1 or any one of the preceding claims, characterised in that heaters (5) are provided in the clean gas pipes (4).
- Heat exchanger according to Claim 6, characterised in that the heaters (5) can be controlled by temperature detection members (7).
- Heat exchanger according to Claim 1 or any one of the preceding claims, characterised in that fans (6) are provided in the clean gas pipes (4).
- Heat exchanger according to Claim 7 or 8, characterised in that the fans (6) can be regulated in dependence on the volume and pressure requirement.
- Heat exchanger according to Claim 1 or any one of the preceding claims, characterised in that the clean gas pipes (4) are equipped with throttle flaps (15) or the like.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3905140 | 1989-02-20 | ||
| DE3905140A DE3905140A1 (en) | 1989-02-20 | 1989-02-20 | HEAT EXCHANGER |
| PCT/EP1990/000267 WO1990009555A1 (en) | 1989-02-20 | 1990-02-19 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0411112A1 EP0411112A1 (en) | 1991-02-06 |
| EP0411112B1 true 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)
| 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)
| 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 |
-
1989
- 1989-02-20 DE DE3905140A patent/DE3905140A1/en not_active Withdrawn
-
1990
- 1990-02-19 AT AT90904267T patent/ATE107409T1/en not_active IP Right Cessation
- 1990-02-19 DE DE59006114T patent/DE59006114D1/en not_active Expired - Fee Related
- 1990-02-19 WO PCT/EP1990/000267 patent/WO1990009555A1/en not_active Ceased
- 1990-02-19 EP EP90904267A patent/EP0411112B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1990009555A1 (en) | 1990-08-23 |
| ATE107409T1 (en) | 1994-07-15 |
| DE3905140A1 (en) | 1990-08-23 |
| EP0411112A1 (en) | 1991-02-06 |
| DE59006114D1 (en) | 1994-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0711192B1 (en) | Arrangement for reducing the humidity content of a gaseous medium | |
| DE69107950T2 (en) | Clean room. | |
| DE69300289T2 (en) | Device for cleaning exhaust gases. | |
| EP0411112B1 (en) | Heat exchanger | |
| DE2526332A1 (en) | Universal type heat exchange device, eg radiator - has humidifier system as well as conventional air heating or cooling function | |
| DE3152372C2 (en) | ||
| EP0177904B1 (en) | Device for exchange of heat between two gases conducted in cross-flow to each other | |
| DE3911276C1 (en) | Device for recovering (reclaiming) heat from the exhaust gases of firing units (installations, systems) | |
| EP0203445B1 (en) | Raw gas-clean gas heat exchanger | |
| DE69102879T2 (en) | GAS COOLER FOR HEAT TRANSFER BY CONVECTION. | |
| DE3333057C1 (en) | Glass tube heat exchanger | |
| DE3532979C2 (en) | ||
| CH535415A (en) | Exhaust gas cooler - with expansion relief for cooling pipes | |
| EP0303096A1 (en) | Surface cooler as an air cooler | |
| DE3812238A1 (en) | DEVICE FOR CONVERTING SOLAR ENERGY INTO PROCESS HEAT | |
| DE2917498C2 (en) | Surface heat exchanger | |
| DE8209397U1 (en) | DEVICE FOR DRYING CARDS WITH WIRED PRINTED CIRCUITS AFTER CLEANING | |
| DE102010024613A1 (en) | Plate heat exchanger for heat transfer of gas i.e. air to liquid media e.g. water, in e.g. air-conditioning system, has plates including micro-channel flat profiles closed by manifolds that are connected to main distribution pipe | |
| DE3909929C1 (en) | Glass tube heat exchanger | |
| DE102024109913A1 (en) | Device and method for cooling a fluid | |
| EP0197168B1 (en) | Cooler for combustion engines | |
| EP0952409A2 (en) | Counterflow heat exchanger | |
| DE2616284A1 (en) | Mine gallery cooling system - has heat pipes at branch lines between water supply and return lines for heat transfer | |
| DE1958840B2 (en) | HEAT EXCHANGE ELEMENT FOR HEATING OR COOLING GASES, IN PARTICULAR AIR, FOR AIR CONDITIONING AND DRYING SYSTEMS | |
| DE685915C (en) | Heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19910125 |
|
| 17Q | First examination report despatched |
Effective date: 19920227 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19940615 Ref country code: DK Effective date: 19940615 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19940615 Ref country code: BE Effective date: 19940615 Ref country code: NL Effective date: 19940615 Ref country code: FR Effective date: 19940615 Ref country code: GB Effective date: 19940615 |
|
| REF | Corresponds to: |
Ref document number: 107409 Country of ref document: AT Date of ref document: 19940715 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 59006114 Country of ref document: DE Date of ref document: 19940721 |
|
| RAP4 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: WALLSTEIN, DIETER |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19940915 |
|
| EN | Fr: translation not filed | ||
| NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
| GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 19940615 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Effective date: 19950219 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19950228 Ref country code: CH Effective date: 19950228 Ref country code: LI Effective date: 19950228 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19950424 Year of fee payment: 6 |
|
| 26N | No opposition filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19961101 |