EP0166190A2 - Cleaning device for a regenerative heat exchanger - Google Patents

Cleaning device for a regenerative heat exchanger Download PDF

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Publication number
EP0166190A2
EP0166190A2 EP85106182A EP85106182A EP0166190A2 EP 0166190 A2 EP0166190 A2 EP 0166190A2 EP 85106182 A EP85106182 A EP 85106182A EP 85106182 A EP85106182 A EP 85106182A EP 0166190 A2 EP0166190 A2 EP 0166190A2
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EP
European Patent Office
Prior art keywords
hood
nozzle
moving part
nozzle tube
cleaning
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
EP85106182A
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German (de)
French (fr)
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EP0166190B1 (en
EP0166190A3 (en
Inventor
Manfred Tratz
Karl-Heinz Dr. Mohr
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Balcke Duerr AG
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Balcke Duerr AG
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Publication of EP0166190A2 publication Critical patent/EP0166190A2/en
Publication of EP0166190A3 publication Critical patent/EP0166190A3/en
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Publication of EP0166190B1 publication Critical patent/EP0166190B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
    • 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
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
    • F28G9/005—Cleaning by flushing or washing, e.g. with chemical solvents of regenerative heat exchanger

Definitions

  • the invention relates to a device for cleaning the heat-exchanging surfaces of the storage masses of regenerative heat exchangers with rotatingly driven hoods by means of a cleaning fluid which emerges from at least one nozzle essentially parallel to the planes of the heat-exchanging surfaces, the nozzle being movable relative to the storage mass.
  • Cleaning devices for the storage masses of regenerative heat exchangers are known both for rotating storage masses and fixed guide devices as well as for fixed storage masses and rotating hoods.
  • Compressed air or superheated steam is preferably used as the cleaning agent, but sometimes also water, to which anti-corrosion inhibitors and wetting agents or solvents can be added.
  • the invention has for its object to provide a cleaning device of the type described, which in addition to a simple construction and high reliability has a low weight and a small space requirement, so that they have no disruptive influence on the flow conditions within the regenerative heat exchanger Consequence.
  • the solution to this problem by the invention is characterized in that the nozzle is arranged at the end of an at least two-part, telescopic nozzle tube which is fastened to the hood of the regenerative heat exchanger and is connected by a feed line to a transfer device arranged in the center of rotation of the hood and which comprises a tube piece rotating with the hood and a includes a stationary, sealed from the pipe section.
  • a particularly light, space-saving and simple cleaning device which essentially consists only of the telescopic nozzle tube and a transfer device through which the cleaning fluid is supplied to the nozzle tube arranged on the rotating hood.
  • the nozzle tube provided with at least one nozzle is adjusted in the radial direction relative to the storage mass, so that all the heat-exchanging surfaces of the storage mass are cleaned in succession by the rotating movement of the hood.
  • the main part of the telescopic nozzle tube lies in the area of the hood that covers the storage mass, so that only the extendable end of the nozzle tube protrudes into the actual flow cross section.
  • the flow area of this extendable part of the nozzle tube is so small, however, that no disturbances in the flow occur. Due to the displaceable arrangement of the nozzle, the device according to the invention can be used for targeted cleaning, so that the advantage is further achieved that the throughput quantities of the cleaning fluid can be reduced compared to known designs.
  • the nozzle tube is formed in two parts from a base part arranged on the hood and a displacement part which can be displaced relative to the base part, the rear end of the base part on the outer circumference and the front end in the region of the rotating means point of the hood is arranged.
  • a displacement part which can be displaced relative to the base part, the rear end of the base part on the outer circumference and the front end in the region of the rotating means point of the hood is arranged.
  • the moving part is connected to an endless, flexible tension element, which is guided via two deflection rollers and whose one deflection roller is connected to a drive wheel which is driven step by step by at least one stationary stop during the rotary movement of the hood.
  • FIG. 1 The schematic plan view of a regenerative heat exchanger according to FIG. 1 shows a fixed storage mass 1, which is equipped with heat-exchanging surfaces in the direction of view, through which hot flue gases and fresh air to be warmed up alternately flow.
  • the change of these two flow media is achieved by a rotating hood 2.
  • Such a hood 2 is arranged on each of the two end faces of the cylindrical storage mass 1.
  • the direction of rotation of the hood 2 is indicated in Fig. 1 by arrows.
  • a cleaning device is arranged on the hood 2 and thus rotates together with the hood 2.
  • 1 shows a housing 3 of this cleaning device and the front end of a telescopic nozzle tube 4, in which at least one nozzle is formed.
  • a cleaning fluid emerges from this nozzle essentially parallel to the planes of the heat-exchanging surfaces of the storage mass 1.
  • An embodiment of this cleaning device is shown in Fig. 2.
  • the nozzle tube 4 is designed in two parts and can be telescoped. It consists of a base part 4a fastened to the hood 2 and of a moving part 4b which has nozzle openings 4c at its front end.
  • the tubular travel part 4b which is closed at the front end except for the nozzle openings 4c, can be displaced in the longitudinal direction on the base part 4a, as indicated by the double arrow and the dash-dotted lines in FIG.
  • Seals 4d are arranged between base part 4a and travel part 4b, which are in any position of the travel part 4b relative to the base Part 4a prevent cleaning fluid from escaping between base part 4a and travel part 4b.
  • the cleaning fluid is fed to the nozzle tube 4 through a feed line 5, which is connected to a stationary line 7 by means of a transfer line 6.
  • a housing 6a is arranged at the end of this line 7 coming from a pressure source for the cleaning fluid.
  • This housing 6a is located in the center of rotation of the hood 2 and is aligned concentrically with the axis of rotation of the hood 2.
  • the open end of a pipe section 6b which is provided with a sealing ring 6c located in the housing 6a, projects into this fixed housing 6a.
  • This pipe section 6b with sealing ring 6c rotates with the hood 2 and is - as can be seen in FIG. 2 - connected to the feed line 5.
  • the moving part 4b is designed to be displaceable on the base part 4a.
  • 3 and 4 show an exemplary embodiment of the adjustment device required for this.
  • two deflection rollers 8a and 8b are rotatably mounted in the housing 3, over which an endless flexible tension element, for example a rope 9, runs.
  • a driver 9a is attached to this rope 9.
  • the cable 9 is driven with the aid of a drive wheel 10, which is connected in a rotationally fixed manner to the deflection roller 8a via its shaft 10a.
  • Fig.l the drive wheel 10 is shown in dashed lines. It can be seen from this illustration that the drive wheel 10 protrudes slightly from the circumference of the hood 2. In this way, the drive wheel 10 provided with projections 10b can be rotated by means of stationary stops 11 when the hood 2 rotates past these stationary stops 11 with the drive wheel 10.
  • Stops 11 can be used to control the gradual rotation of the drive wheel 10, it being possible, according to the double arrows drawn in FIG.
  • the circulating movement of the cable 9 generated with the aid of the drive wheel 10 is used to adjust the moving part 4b relative to the base part 4a.
  • driving pins 4e are arranged on the moving part 4b.
  • Fig. 4 it is shown that when the driver 9a rotates, first the moving part 4b is moved radially outwards from the collapsed position of the telescopic nozzle tube 4, in which the nozzle openings 4c cover the radially innermost part of the storage mass 1 End position of the feed movement has been reached. Subsequently, the driver 9a starts the return after its rotation around the deflection roller 8b.
  • the moving part 4b is carried along via the second driving bolt 4e in the direction of the end position of the return movement.
  • the driving bolts 4e are slightly offset from one another in the longitudinal direction of the moving part 4b, as shown in particular in FIG.

Abstract

Die Erfindung betrifft eine Vorrichtung zur Reinigung der wärmetauschenden Flächen der Speichermassen von Regenerativ-Wärmetauschern mit drehend angetriebenen Hauben mittels eines Reinigungsfluids, das aus mindestens einer Düse im wesentlichen parallel zu den Ebenen der wärmetauschenden Flächen austritt, wobei die Düse relativ zur Speichermasse verfahrbar ist. Um eine konstruktiv einfache, leichte und raumsparend unterzubringende Reinigungsvorrichtung zu schaffen, ist die Düse am Ende eines mindestens zweiteiligen, teleskopierbaren Düsenrohres angeordnet, das an der Haube des Regenerativ-Wärmetauschers befestigt und durch eine Zuführleitung mit einer im Drehmittelpunkt der Haube angeordneten Überleitungsvorrichtung verbunden ist, die ein mit der Haube drehendes Rohrstück und ein feststehendes, gegenüber dem Rohrstück abgedichtetes Gehäuse umfaßt. Die Verstellbewegung des verfahrbaren Teils des Düsenrohres kann von der Drehbewegung der Haube abgeleitet werden.The invention relates to a device for cleaning the heat-exchanging surfaces of the storage masses of regenerative heat exchangers with rotatingly driven hoods by means of a cleaning fluid which emerges from at least one nozzle essentially parallel to the planes of the heat-exchanging surfaces, the nozzle being movable relative to the storage mass. In order to create a structurally simple, light and space-saving cleaning device, the nozzle is arranged at the end of an at least two-part, telescopic nozzle tube which is attached to the hood of the regenerative heat exchanger and connected by a feed line to a transfer device arranged in the center of rotation of the hood, which comprises a tubular piece rotating with the hood and a stationary housing which is sealed off from the tubular piece. The adjustment movement of the movable part of the nozzle tube can be derived from the rotary movement of the hood.

Description

Die Erfindung betrifft eine Vorrichtung zur Reinigung der wärmetauschenden Flächen der Speichermassen von Regenerativ-Wärmetauschern mit drehend angetriebenen Hauben mittels eines Reinigungsfluids, das aus mindestens einer Düse im wesentlichen parallel zu den Ebenen der wärmetauschenden Flächen austritt, wobei die Düse relativ zur Speichermasse verfahrbar ist.The invention relates to a device for cleaning the heat-exchanging surfaces of the storage masses of regenerative heat exchangers with rotatingly driven hoods by means of a cleaning fluid which emerges from at least one nozzle essentially parallel to the planes of the heat-exchanging surfaces, the nozzle being movable relative to the storage mass.

Reinigungsvorrichtungen für die Speichermassen von Regenerativ-Wärmetauschern sind sowohl für drehende Speichermassen und feststehende Leitvorrichtungen als auch für feststehende Speichermassen und drehende Hauben bekannt. Als Reinigungsmittel wird vorzugsweise Druckluft oder Heißdampf verwendet, teilweise jedoch auch Wasser, dem Antikorrosionsinhibitoren und Netz- bzw. Lösungsmittel zugesetzt sein können.Cleaning devices for the storage masses of regenerative heat exchangers are known both for rotating storage masses and fixed guide devices as well as for fixed storage masses and rotating hoods. Compressed air or superheated steam is preferably used as the cleaning agent, but sometimes also water, to which anti-corrosion inhibitors and wetting agents or solvents can be added.

Der Erfindung liegt die Aufgabe zugrunde, eine Reinigungsvorrichtung der eingangs beschriebenen Art zu schaffen, die neben einem einfachen konstruktiven Aufbau und einer hohen Funktionssicherheit ein niedriges Gewicht und einen geringen Raumbedarf hat, so daß sie keinen störenden Einfluß auf die Strömungsverhältnisse innerhalb des Regenerativ-Wärmetauschers zur Folge hat.The invention has for its object to provide a cleaning device of the type described, which in addition to a simple construction and high reliability has a low weight and a small space requirement, so that they have no disruptive influence on the flow conditions within the regenerative heat exchanger Consequence.

Die Lösung dieser Aufgabenstellung durch die Erfindung ist dadurch gekennzeichnet, daß die Düse am Ende eines mindestens zweiteiligen, teleskopierbaren Düsenrohres angeordnet ist, das an der Haube des Regenerativ-Wärmetauschers befestigt und durch eine Zuführleitung mit einer im Drehmittelpunkt der Haube angeordneten Uberleitungsvorrichtung verbunden ist, die ein mit der Haube drehendes Rohrstück und ein feststehendes, gegenüber dem Rohrstück abgedichtetes Gehäuse umfaßt.The solution to this problem by the invention is characterized in that the nozzle is arranged at the end of an at least two-part, telescopic nozzle tube which is fastened to the hood of the regenerative heat exchanger and is connected by a feed line to a transfer device arranged in the center of rotation of the hood and which comprises a tube piece rotating with the hood and a includes a stationary, sealed from the pipe section.

Mit dem Vorschlag der Erfindung wird eine besonders leichte, raumsparende und einfache Reinigungsvorrichtung geschaffen, die im wesentlichen nur aus dem teleskopierbaren Düsenrohr und einer Uberleitungsvorrichtung besteht, durch die das Reinigungsfluid dem an der drehenden Haube angeordneten Düsenrohr zugeführt wird. Das mit mindestens einer Düse versehene Düsenrohr wird in radialer Richtung relativ zur Speichermasse verstellt, so daß durch die Drehbewegung der Haube nacheinander sämtliche wärmetauschenden Flächen der Speichermasse gereinigt werden. Der Hauptteil des teleskopierbaren Düsenrohres liegt hierbei in demjenigen Bereich der Haube, der die Speichermasse abdeckt, so daß lediglich das ausfahrbare Ende des Düsenrohres in den eigentlichen Strömungsquerschnitt hineinragt. Die Anströmfläche dieses ausfahrbaren Teils des Düsenrohres ist jedoch derart klein, daß keine Störungen in der Strömung auftreten. Durch die verschiebbare Anordnung der Düse kann mit der erfindungsgemäßen Vorrichtung gezielt gereinigt werden, so daß weiterhin der Vorteil erreicht wird, daß die Durchsatzmengen des Reinigungsfluids gegenüber bekannten Ausführungen verkleinert werden können.With the proposal of the invention, a particularly light, space-saving and simple cleaning device is created which essentially consists only of the telescopic nozzle tube and a transfer device through which the cleaning fluid is supplied to the nozzle tube arranged on the rotating hood. The nozzle tube provided with at least one nozzle is adjusted in the radial direction relative to the storage mass, so that all the heat-exchanging surfaces of the storage mass are cleaned in succession by the rotating movement of the hood. The main part of the telescopic nozzle tube lies in the area of the hood that covers the storage mass, so that only the extendable end of the nozzle tube protrudes into the actual flow cross section. The flow area of this extendable part of the nozzle tube is so small, however, that no disturbances in the flow occur. Due to the displaceable arrangement of the nozzle, the device according to the invention can be used for targeted cleaning, so that the advantage is further achieved that the throughput quantities of the cleaning fluid can be reduced compared to known designs.

Bei einer bevorzugten Ausführungsform der Erfindung ist das Düsenrohr zweiteilig aus einem an der Haube angeordneten Basisteil und einem relativ zum Basisteil verschiebbaren Verfahrteil ausgebildet, wobei das hintere Ende des Basisteils am Außenumfang und das vordere Ende im Bereich des Drehmittelpunktes der Haube angeordnet ist. Hierdurch ist es auf einfache Weise möglich, die am vorderen Ende des verschiebbaren Verfahrteils ausgebildete Düse über den gesamten Halbmesser der stehenden Speichermasse zu verschieben. Gemäß einem weiteren Merkmal der Erfindung ist das die Düse enthaltende Verfahrteil des Düsenrohres von einer Verstelleinrichtung in Abhängigkeit vom Umfang der jeweils vom Reinigungsfluid beaufschlagten Fläche verstellbar.In a preferred embodiment of the invention, the nozzle tube is formed in two parts from a base part arranged on the hood and a displacement part which can be displaced relative to the base part, the rear end of the base part on the outer circumference and the front end in the region of the rotating means point of the hood is arranged. This makes it possible in a simple manner to move the nozzle formed at the front end of the displaceable moving part over the entire radius of the standing storage mass. According to a further feature of the invention, the moving part of the nozzle tube containing the nozzle can be adjusted by an adjusting device depending on the extent of the surface in each case acted upon by the cleaning fluid.

Obwohl die Möglichkeit besteht, an der drehenden Haube einen Stellantrieb für den Verfahrteil des Düsenrohres anzuordnen, wird in Weiterbildung der Erfindung vorgeschlagen, auf einen derartigen Stellantrieb zu verzichten und die Verstellbewegung für das Verfahrteil von der Drehbewegung der Haube abzuleiten. Bei einer bevorzugten Ausführungsform ist das Verfahrteil mit einem endlosen, über zwei Umlenkrollen geführten, biegsamen Zugelement verbunden, dessen eine Umlenkrolle mit einem Antriebsrad verbunden ist, das bei der Drehbewegung der Haube von mindestens einem ortsfesten Anschlag schrittweise angetrieben ist.Although it is possible to arrange an actuator for the moving part of the nozzle tube on the rotating hood, it is proposed in a development of the invention to dispense with such an actuator and to derive the adjusting movement for the moving part from the rotary movement of the hood. In a preferred embodiment, the moving part is connected to an endless, flexible tension element, which is guided via two deflection rollers and whose one deflection roller is connected to a drive wheel which is driven step by step by at least one stationary stop during the rotary movement of the hood.

Auf der Zeichnung ist ein Ausführungsbeispiel der erfindungsgemäßen Reinigungsvorrichtung dargestellt, und zwar zeigen:

  • Fig. 1 eine schematische Draufsicht auf einen Regenerativ-Wärmetauscher mit drehend angetriebener Haube und angebauter Reinigungsvorrichtung,
  • Fig. 2 einen senkrechten Schnitt durch das teleskopierbare Düsenrohr und die Uberleitungsvorrichtung für das Reinigungsfluid,
  • Fig. 3 eine perspektivische Darstellung der in einem Gehäuse untergebrachten Reinigungsvorrichtung und
  • Fig. 4 eine Draufsicht auf die Ausführungsform nach Fig. 3 zwecks Erläuterung der Verschiebewegung des Verfahrteils.
An exemplary embodiment of the cleaning device according to the invention is shown in the drawing, namely:
  • 1 is a schematic plan view of a regenerative heat exchanger with a rotating hood and attached cleaning device,
  • 2 shows a vertical section through the telescopic nozzle tube and the transfer device for the cleaning fluid,
  • Fig. 3 is a perspective view of the cleaning device housed in a housing and
  • Fig. 4 is a plan view of the embodiment of FIG. 3 for the purpose of explaining the displacement movement of the moving part.

Die schematische Draufsicht auf einen Regenerativ-Wärmetauscher gemäß Fig. 1 zeigt eine feststehende Speichermasse 1, die in Blickrichtung mit wärmeaustauschenden Flächen ausgestattet ist, welche abwechselnd von heißen Rauchgasen und aufzuwärmender Frischluft durchströmt werden. Der Wechsel dieser beiden Strömungsmedien wird durch eine drehende Haube 2 erzielt. Eine derartige Haube 2 ist an jeder der beiden Stirnseiten der zylindrischen Speichermasse 1 angeordnet. Die Drehrichtung der Haube 2 ist in Fig. 1 durch Pfeile angedeutet.The schematic plan view of a regenerative heat exchanger according to FIG. 1 shows a fixed storage mass 1, which is equipped with heat-exchanging surfaces in the direction of view, through which hot flue gases and fresh air to be warmed up alternately flow. The change of these two flow media is achieved by a rotating hood 2. Such a hood 2 is arranged on each of the two end faces of the cylindrical storage mass 1. The direction of rotation of the hood 2 is indicated in Fig. 1 by arrows.

An der Haube 2 ist eine Reinigungsvorrichtung angeordnet, die somit zusammen mit der Haube 2 umläuft. In Fig. 1 ist ein Gehäuse 3 dieser Reinigungsvorrichtung sowie das vordere Ende eines teleskopierbaren Düsenrohres 4 zu erkennen, in dem mindestens eine Düse ausgebildet ist. Aus dieser Düse tritt ein Reinigungsfluid im wesentlichen parallel zu den Ebenen der wärmetauschenden Flächen der Speichermasse 1 aus. Ein Ausführungsbeispiel dieser Reinigungsvorrichtung ist in Fig. 2 dargestellt.A cleaning device is arranged on the hood 2 and thus rotates together with the hood 2. 1 shows a housing 3 of this cleaning device and the front end of a telescopic nozzle tube 4, in which at least one nozzle is formed. A cleaning fluid emerges from this nozzle essentially parallel to the planes of the heat-exchanging surfaces of the storage mass 1. An embodiment of this cleaning device is shown in Fig. 2.

Das Düsenrohr 4 ist gemäß dem Ausführungsbeispiel gemäß Fig.2 zweiteilig und teleskopierbar ausgeführt.Es besteht aus einem an der Haube 2 befestigten Basisteil 4a-und aus einem Verfahrteil 4b,das an seinem vorderen Ende Düsenöffnungen 4c aufweist. Das rohrförmige,am vorderen Ende bis auf die Düsenöffnungen 4c geschlossene Verfahrteil 4b ist auf dem Basisteil 4a in Längsrichtung verschiebbar,wie mit dem Doppelpfeil und den strichpunktierten Linien in Fig.2 angedeutet ist. Zwischen Basisteil 4a und Verfahrteil 4b sind Dichtungen 4d angeordnet, die in jeder Stellung des Verfahrteiles 4b relativ zum Basisteil 4a verhindern, daß Reinigungsfluid zwischen Basisteil 4a und Verfahrteil 4b austritt.According to the exemplary embodiment according to FIG. 2, the nozzle tube 4 is designed in two parts and can be telescoped. It consists of a base part 4a fastened to the hood 2 and of a moving part 4b which has nozzle openings 4c at its front end. The tubular travel part 4b, which is closed at the front end except for the nozzle openings 4c, can be displaced in the longitudinal direction on the base part 4a, as indicated by the double arrow and the dash-dotted lines in FIG. Seals 4d are arranged between base part 4a and travel part 4b, which are in any position of the travel part 4b relative to the base Part 4a prevent cleaning fluid from escaping between base part 4a and travel part 4b.

Das Reinigungsfluid wird dem Düsenrohr 4 durch eine Zuführleitung 5 zugeführt, die mit Hilfe einer Uberleitungsvorrichtung 6 mit einer ortsfesten Leitung 7 in Verbindung steht. Bei dem in Fig.2 dargestellten Ausführungsbeispiel ist am Ende dieser von einer Druckquelle für das Reinigungsfluid kommenden Leitung 7 ein Gehäuse 6a angeordnet. Dieses Gehäuse 6a befin- det sich im Drehmittelpunkt der Haube 2 und ist konzentrisch zur Drehachse der Haube 2 ausgerichtet. In dieses feststehende Gehäuse 6a ragt das offene Ende eines Rohrstückes 6b hinein, das mit einem im Gehäuse 6a liegenden Dichtring 6c versehen ist. Dieses Rohrstück 6b mit Dichtring 6c dreht mit der Haube 2 und steht - wie Fig.2 erkennen läßt - mit der Zuführleitung 5 in Verbindung.The cleaning fluid is fed to the nozzle tube 4 through a feed line 5, which is connected to a stationary line 7 by means of a transfer line 6. In the exemplary embodiment shown in FIG. 2, a housing 6a is arranged at the end of this line 7 coming from a pressure source for the cleaning fluid. This housing 6a is located in the center of rotation of the hood 2 and is aligned concentrically with the axis of rotation of the hood 2. The open end of a pipe section 6b, which is provided with a sealing ring 6c located in the housing 6a, projects into this fixed housing 6a. This pipe section 6b with sealing ring 6c rotates with the hood 2 and is - as can be seen in FIG. 2 - connected to the feed line 5.

Wie durch strichpunktierte Linien in den Fig.l und 2 angedeutet ist, ist das Verfahrteil 4b auf dem Basisteil 4a verschiebbar ausgeführt. Ein Ausführungsbeispiel für die hierzu benötigte Verstelleinrichtung zeigen die Fig.3 und 4.As indicated by dash-dotted lines in FIGS. 1 and 2, the moving part 4b is designed to be displaceable on the base part 4a. 3 and 4 show an exemplary embodiment of the adjustment device required for this.

Bei dieser Ausführungsform sind im Gehäuse 3 zwei Umlenkrollen 8a und 8b drehbar gelagert,über die ein endloses biegsames Zugelement,beispielsweise ein Seil 9 läuft. An diesem Seil 9 ist ein Mitnehmer 9a befestigt. Der Antrieb des Seiles 9 erfolgt mit Hilfe eines Antriebsrades 10,das über seine Welle 10a mit der Umlenkrolle 8a drehfest verbunden ist.In this embodiment, two deflection rollers 8a and 8b are rotatably mounted in the housing 3, over which an endless flexible tension element, for example a rope 9, runs. A driver 9a is attached to this rope 9. The cable 9 is driven with the aid of a drive wheel 10, which is connected in a rotationally fixed manner to the deflection roller 8a via its shaft 10a.

In Fig.l ist das Antriebsrad 10 gestrichelt eingezeichnet. Aus dieser Darstellung geht hervor,daß das Antriebsrad 10 geringfügig aus dem Umfang der Haube 2 hervorsteht. Auf diese Weise kann das mit Vorsprüngen 10b versehene Antriebsrad 10 durch ortsfeste Anschläge 11 in Umdrehungen versetzt werden, wenn die Haube 2 mit dem Antriebsrad 10 an diesen ortsfesten Anschlägen 11 vorbeidreht. Durch die Anordnung und Zahl der Anschläge 11 kann die schrittweise erfolgende Verdrehung des Antriebsrades 10 gesteuert werden,wobei es gemäß den in Fig.3 eingezeichneten Doppelpfeilen möglich ist,die Anschläge 11 entweder in den Bewegungsbereich der Vorsprünge 10b des Kettenrades 10 vorzuschieben oder aus diesem Bewegungsbereich zurückzuziehen.In Fig.l the drive wheel 10 is shown in dashed lines. It can be seen from this illustration that the drive wheel 10 protrudes slightly from the circumference of the hood 2. In this way, the drive wheel 10 provided with projections 10b can be rotated by means of stationary stops 11 when the hood 2 rotates past these stationary stops 11 with the drive wheel 10. By the arrangement and number of Stops 11 can be used to control the gradual rotation of the drive wheel 10, it being possible, according to the double arrows drawn in FIG.

Die mit Hilfe des Antriebsrades 10 erzeugte Umlaufbewegung des Seiles 9 wird dazu benutzt,das Verfahrteil 4b relativ zum Basisteil 4a zu verstellen. Zu diesem Zweck sind am Verfahrteil 4b Mitnahmebolzen 4e angeordnet. In Fig.4 ist gezeigt, daß bei einem Umlauf des Mitnehmers 9a zuerst das Verfahrteil 4b aus der zusammengeschobenen Lage des teleskopierbaren Düsenrohres 4, in der die Düsenöffnungen 4c den radial am weitesten innenliegenden Teil der Speichermasse 1 bestreichen,radial nach außen verfahren wird bis die Endlage der Vorschubbewegung erreicht ist. Anschließend tritt der Mitnehmer 9a nach seinem Umlauf um die Umlenkrolle 8b den Rücklauf an. Während dieses Rücklaufes des Mitnehmers 9a wird das Verfahrteil 4b über den zweiten Mitnahmebolzen 4e in Richtung auf die Endlage der Rücklaufbewegung mitgenommen. Zu diesem Zweck sind die Mitnahmebolzen 4e in Längsrichtung des Verfahrteiles 4b geringfügig zueinander versetzt,wie dies insbesondere die Fig.4 zeigtThe circulating movement of the cable 9 generated with the aid of the drive wheel 10 is used to adjust the moving part 4b relative to the base part 4a. For this purpose, driving pins 4e are arranged on the moving part 4b. In Fig. 4 it is shown that when the driver 9a rotates, first the moving part 4b is moved radially outwards from the collapsed position of the telescopic nozzle tube 4, in which the nozzle openings 4c cover the radially innermost part of the storage mass 1 End position of the feed movement has been reached. Subsequently, the driver 9a starts the return after its rotation around the deflection roller 8b. During this return movement of the driver 9a, the moving part 4b is carried along via the second driving bolt 4e in the direction of the end position of the return movement. For this purpose, the driving bolts 4e are slightly offset from one another in the longitudinal direction of the moving part 4b, as shown in particular in FIG

Über die Anzahl der ortsfesten Anschläge lla und deren gesteuerte Einbringung in den Bewegungsbereich der Vorsprünge 10b des Antriebsrades 10 kann erreicht werden,daß entweder besonders gefährdete Stellen der Speichermasse 1 besonders gründlich mit Reinigungsfluid beaufschlagt werden oder eine gleichmäßige Reinigung der Speichermasse 1 erfolgt, und zwar in Abhängigkeit vom Umfang der jeweils vom Reinigungsfluid beaufschlagten Fläche der Speichermasse 1.Via the number of stationary stops 11a and their controlled introduction into the range of movement of the projections 10b of the drive wheel 10, it can be achieved that either particularly sensitive areas of the storage mass 1 are treated particularly thoroughly with cleaning fluid or a uniform cleaning of the storage mass 1 takes place, specifically in Dependence on the extent of the surface of the storage mass 1 that is in each case acted upon by the cleaning fluid.

Claims (7)

1. Vorrichtung zur Reinigung der wärmetauschenden Flächen der Speichermassen von Regenerativ-Wärmetauschern mit drehend angetriebenen Hauben mittels eines Reinigungsfluids,das aus mindestens einer Düse im wesentlichen parallel zu den Ebenen der wärmetauschenden Flächen austritt,wobei die Düse relativ zur Speichermasse verfahrbar ist,
dadurch gekennzeichnet,
daß die Düse (4c) am Ende eines mindestens zweiteiligen, teleskopierbaren Düsenrohres (4) angeordnet ist,das an der Haube (2) des Regenerativ-Wärmetauschers befestigt und durch eine Zuführleitung (5) mit einer im Drehmittelpunkt der Haube (2) angeordneten Uberleitungsvorrichtung (6) verbunden ist,die ein mit der Haube (2) drehendes Rohrstück (6b) und ein feststehendes, gegenüber dem Rohrstück (6b) abgedichtetes Gehäuse (6a) umfaßt.1. Device for cleaning the heat-exchanging surfaces of the storage masses of regenerative heat exchangers with rotatingly driven hoods by means of a cleaning fluid which emerges from at least one nozzle essentially parallel to the planes of the heat-exchanging surfaces, the nozzle being movable relative to the storage mass.
characterized,
that the nozzle (4c) is arranged at the end of an at least two-part, telescopic nozzle tube (4) which is attached to the hood (2) of the regenerative heat exchanger and through a feed line (5) with a transfer device arranged in the center of rotation of the hood (2) (6) is connected, which comprises a tubular piece (6b) rotating with the hood (2) and a stationary housing (6a) sealed with respect to the tubular piece (6b). 2. Vorrichtung nach Anspruch 1,dadurch gekennzeichnet,daß das Düsenrohr (4) zweiteilig aus einem an der Haube (2) angeordneten Basisteil (4a) und einem relativ zum Basisteil (4a) verschiebbaren Verfahrteil (4b) ausgebildet ist,wobei das hintere Ende des Basisteils (4a) am Außenumfang und das vordere Ende im Bereich des Drehmittelpunkts der Haube (2) angeordnet ist.2. Device according to claim 1, characterized in that the nozzle tube (4) is formed in two parts from a on the hood (2) arranged base part (4a) and a relative to the base part (4a) displaceable moving part (4b), the rear end of the base part (4a) is arranged on the outer circumference and the front end in the region of the center of rotation of the hood (2). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das die Düse (4c) enthaltende Verfahrteil (4b) des Düsenrohres (4) von einem Stellantrieb in Abhängigkeit vom Umfang der jeweils vom Reinigungsfluid beaufschlagten Fläche verstellbar ist.3. Apparatus according to claim 1 or 2, characterized in that the moving part (4c) containing the nozzle (4c) of the nozzle tube (4) is adjustable by an actuator depending on the extent of the surface acted upon by the cleaning fluid. 4. Vorrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Verstellbewegung des Verfahrteils (4b) des Düsenrohres (4) von der Drehbewegung der Haube (2) abgeletet ist.4. Device according to claims 1 to 3, characterized in that the adjusting movement of the moving part (4b) of the nozzle tube (4) from the rotary movement of the hood (2) is replaced. 5. Vorrichtung nach Anspruch 4,dadurch gekennzeichnet,daß das Verfahrteil (4b) mit einem endlosen,über zwei Umlenkrollen (8a,8b) geführten, biegsamen Zugelement (9) verbunden ist, dessen eine Umlenkrolle (8a) mit einem Antriebsrad (10) verbunden ist,das bei der Drehbewegung der Haube (2) von mindestens einem ortsfesten Anschlag (11) schrittweise angetrieben ist.5. The device according to claim 4, characterized in that the moving part (4b) with an endless, via two deflection rollers (8a, 8b) guided, flexible tension element (9) is connected, one deflection roller (8a) with a drive wheel (10) is connected, which is driven step by step during the rotational movement of the hood (2) by at least one fixed stop (11). Bezugsziffernliste:List of reference numbers: 1 Speichermasse1 storage mass 2 Haube2 hood 3 Gehäuse3 housing 4 Düsenrohr4 nozzle pipe 4a Basisteil4a base part 4b Verfahrteil4b moving part 4c Düsenöffnung4c nozzle opening 4d Dichtung4d seal 4e Mitnahmebolzen4e drive pin 5 Zuführleitung5 supply line 6 Überleitungsvorrichtung6 transfer device 6a Gehäuse6a housing 6b Rohrstück6b pipe section 6c Dichtring6c sealing ring 7 Leitung7 line 8a Umlenkrolle8a pulley 8b Umlenkrolle8b pulley 9 Seil9 rope 9a Mitnehmer9a carrier 10 Antriebsrad10 drive wheel 10a Welle10a wave 10b Vorsprung10b lead 11 Anschlag11 stop
EP85106182A 1984-06-27 1985-05-21 Cleaning device for a regenerative heat exchanger Expired EP0166190B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3423619 1984-06-27
DE3423619A DE3423619C2 (en) 1984-06-27 1984-06-27 Device for cleaning the heat-exchanging surfaces of the storage masses of regenerative heat exchangers

Publications (3)

Publication Number Publication Date
EP0166190A2 true EP0166190A2 (en) 1986-01-02
EP0166190A3 EP0166190A3 (en) 1986-12-03
EP0166190B1 EP0166190B1 (en) 1988-03-23

Family

ID=6239232

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Application Number Title Priority Date Filing Date
EP85106182A Expired EP0166190B1 (en) 1984-06-27 1985-05-21 Cleaning device for a regenerative heat exchanger

Country Status (8)

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US (1) US4705057A (en)
EP (1) EP0166190B1 (en)
JP (1) JPS6115097A (en)
CN (1) CN85104615B (en)
DE (1) DE3423619C2 (en)
ES (1) ES8609693A1 (en)
IN (1) IN160618B (en)
MX (1) MX161261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617860A1 (en) * 1996-04-23 1997-10-30 Buchen Gmbh Richard Safety device for high pressure cleaning devices for cleaning pipe heat exchangers

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972804A (en) * 1989-04-25 1990-11-27 Alexander T. Kindling Method and apparatus for organizing the flow of fluid in a vertical steam generator
US5019329A (en) * 1989-12-26 1991-05-28 Westinghouse Electric Corp. System and method for vertically flushing a steam generator during a shock wave cleaning operation
US5336331A (en) * 1992-01-22 1994-08-09 Jenkins Jerry Y Continuous condenser backflush and cleaning systems and methods for use thereof
US5924478A (en) * 1997-05-08 1999-07-20 Caterpillar Inc. Radiator washing system and method
US6318108B1 (en) 2000-09-27 2001-11-20 George L. Holstein Self-washing coil for air conditioning units
DK2051033T3 (en) * 2007-10-17 2010-05-31 Balcke Duerr Gmbh Regenerative heat exchanger
US20140041692A1 (en) 2012-08-07 2014-02-13 Aquarecycle, Llc Apparatus for cleaning a surface

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE515533A (en) *
US1858508A (en) * 1925-03-14 1932-05-17 Ljungstroms Angturbin Ab Regenerative heating device
US2355021A (en) * 1941-08-08 1944-08-01 Air Preheater Washing apparatus for air preheaters
FR1186972A (en) * 1957-04-17 1959-09-04 Svenska Rotor Maskiner Ab Rotary preheater cleaning device
DE1143959B (en) * 1957-12-05 1963-02-21 Kraftanlagen Ag Flue gas heated regenerative air preheater with fixed storage mass and circumferential air connections
GB990661A (en) * 1962-06-04 1965-04-28 Dow Corning Improvements in or relating to organosilicon ureas
US3493461A (en) * 1969-01-21 1970-02-03 Union Carbide Corp Glass fiber reinforced polyvinyl chloride resin article and process therefor
US3726907A (en) * 1967-05-22 1973-04-10 Stevens & Co Inc J P Reactive polyfunctional silanes
US4046794A (en) * 1972-04-14 1977-09-06 Union Carbide Corporation Urea silicon product and uses thereof
JPS5657792A (en) * 1979-10-15 1981-05-20 Shin Etsu Chem Co Ltd Preparation of ureido group-containing alkoxysilane
NL8006415A (en) * 1980-11-25 1982-06-16 Ppg Industries Inc UV stable glass fibre size contg. polyurethane dispersion - and ureido- and amino functional silane(s) used to reinforce polymer e.g. polyamide or polystyrene

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123132A (en) * 1964-03-03 Device for fluid cleaning of heat
US987450A (en) * 1910-12-07 1911-03-21 Vulcan Soot Cleaner Company Of Pittsburg Boiler-flue cleaner.
US1095991A (en) * 1913-11-26 1914-05-05 Gordon C Bennett Blower for boilers.
US1116873A (en) * 1914-03-10 1914-11-10 William L Cronin Boiler-flue blower.
US1141304A (en) * 1915-02-01 1915-06-01 James C Bennett Blower for boilers.
GB160588A (en) * 1920-01-20 1921-03-31 Harry Francis Jackson Thompson Cleaning condenser tubes and the like
US1939153A (en) * 1932-02-23 1933-12-12 Armando S Villasuso Regenerative heater
US2236635A (en) * 1940-01-03 1941-04-01 Jay A Young Apparatus for cleaning preheaters
NL103708C (en) * 1940-11-21
US2379506A (en) * 1943-08-13 1945-07-03 Air Preheater Rotor operated washing nozzle
US2668978A (en) * 1951-02-07 1954-02-16 Diamond Power Speciality Retractable soot blower of the long-travel trolley supported type
US2812923A (en) * 1954-03-11 1957-11-12 Air Preheater Preheater washing device
US3183961A (en) * 1960-09-08 1965-05-18 Brandt Herbert Method and apparatus for controlling the temperature and humidity of a regenerative air-heater
US3233661A (en) * 1962-11-16 1966-02-08 Svenska Rotor Maskiner Ab Flue gas heated regenerative air preheater with stationary heat retaining mass and rotary air channel valves
DE1904117U (en) * 1964-08-04 1964-11-12 Appbau Rothemuehle Brandt & Kr RUSSBLAESER FOR REGENERATIVE AIR HEATERS WITH CIRCULAR AIR HOODS AND STATIONARY HEATING SURFACES.
GB1160439A (en) * 1965-09-21 1969-08-06 Jean Eugene Julien Dulait Improvements to Soot Blowing Devices.
US3595250A (en) * 1968-04-12 1971-07-27 Malsbary Mfg Co Automatic carwash apparatus
GB1559679A (en) * 1975-11-04 1980-01-23 Davidson & Co Ltd Regenerative air preheaters and seal frame suspension control system therefor
IT1069399B (en) * 1976-12-23 1985-03-25 Autelli Giulio MULTI-NOZZLE MULTIPLE LANCE FOR THE WASHING OF ROTATING HEAT EXCHANGERS AND DISTRIBUTOR FOR THESE LANCES
SE422711B (en) * 1978-05-19 1982-03-22 Frigoscandia Contracting Ab SET TO REMOVE FROZEN COATING BATTERIES FROM COOL BATTERIES AND DEVICE IMPLEMENTATION
US4296780A (en) * 1978-06-21 1981-10-27 A. B. Carl Munters Apparatus including throttling device for use in ventilation duct
BE879153A (en) * 1979-10-02 1980-02-01 Sadacem SWEEPING SYSTEM FOR ROTARY AIR HEATERS
US4428417A (en) * 1981-12-09 1984-01-31 Chesner Ramon J Heat exchanger cleaner
JPS5952199A (en) * 1982-09-20 1984-03-26 Nippon Furekuto Kk Rotary heat exchanger equipped with sweeping function
US4542785A (en) * 1983-09-23 1985-09-24 Massey-Ferguson Industries Limited Agricultural harvester heat exchanger

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE515533A (en) *
US1858508A (en) * 1925-03-14 1932-05-17 Ljungstroms Angturbin Ab Regenerative heating device
US2355021A (en) * 1941-08-08 1944-08-01 Air Preheater Washing apparatus for air preheaters
FR1186972A (en) * 1957-04-17 1959-09-04 Svenska Rotor Maskiner Ab Rotary preheater cleaning device
DE1143959B (en) * 1957-12-05 1963-02-21 Kraftanlagen Ag Flue gas heated regenerative air preheater with fixed storage mass and circumferential air connections
GB990661A (en) * 1962-06-04 1965-04-28 Dow Corning Improvements in or relating to organosilicon ureas
US3726907A (en) * 1967-05-22 1973-04-10 Stevens & Co Inc J P Reactive polyfunctional silanes
US3493461A (en) * 1969-01-21 1970-02-03 Union Carbide Corp Glass fiber reinforced polyvinyl chloride resin article and process therefor
US4046794A (en) * 1972-04-14 1977-09-06 Union Carbide Corporation Urea silicon product and uses thereof
JPS5657792A (en) * 1979-10-15 1981-05-20 Shin Etsu Chem Co Ltd Preparation of ureido group-containing alkoxysilane
NL8006415A (en) * 1980-11-25 1982-06-16 Ppg Industries Inc UV stable glass fibre size contg. polyurethane dispersion - and ureido- and amino functional silane(s) used to reinforce polymer e.g. polyamide or polystyrene

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 120 (C-65), 4. August 1981, Seite 83 C 65; & JP - A - 56 57792 (SHINETSU KAGAKU) 20.05.1981 (Cat. D); & CHEMICAL ABSTRACTS, Band 95, Nr. 23, 7. Dezember 1981, Seite 701, Spalte 1, Abstract Nr. 204144w, Columbus, Ohio, US; SHIN-ETSU CHEMICAL INDUSTRY CO. LTD.: "Alkoxysilanes containing ureide groups" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617860A1 (en) * 1996-04-23 1997-10-30 Buchen Gmbh Richard Safety device for high pressure cleaning devices for cleaning pipe heat exchangers

Also Published As

Publication number Publication date
ES544528A0 (en) 1986-07-16
ES8609693A1 (en) 1986-07-16
MX161261A (en) 1990-08-24
EP0166190B1 (en) 1988-03-23
CN85104615B (en) 1988-01-06
DE3423619C2 (en) 1986-09-04
CN85104615A (en) 1986-12-10
JPH0373799B2 (en) 1991-11-22
US4705057A (en) 1987-11-10
EP0166190A3 (en) 1986-12-03
IN160618B (en) 1987-07-18
DE3423619A1 (en) 1986-01-02
JPS6115097A (en) 1986-01-23

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