EP0039767B1 - Cyclone, especially for multi-stage heat exchanger - Google Patents

Cyclone, especially for multi-stage heat exchanger Download PDF

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Publication number
EP0039767B1
EP0039767B1 EP81102125A EP81102125A EP0039767B1 EP 0039767 B1 EP0039767 B1 EP 0039767B1 EP 81102125 A EP81102125 A EP 81102125A EP 81102125 A EP81102125 A EP 81102125A EP 0039767 B1 EP0039767 B1 EP 0039767B1
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EP
European Patent Office
Prior art keywords
cyclone
partial
spiral
diameter
spirals
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
Application number
EP81102125A
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German (de)
French (fr)
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EP0039767A3 (en
EP0039767A2 (en
Inventor
Otto Ing. Grad. Heinemann
Heinz-Herbert Ing. Grad. Schmits
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.)
ThyssenKrupp Industrial Solutions AG
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Krupp Polysius AG
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Publication of EP0039767A2 publication Critical patent/EP0039767A2/en
Publication of EP0039767A3 publication Critical patent/EP0039767A3/en
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    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/081—Shapes or dimensions
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/04—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being spirally coiled

Definitions

  • the invention relates to a cyclone, in particular for multi-stage heat exchangers, with an external inlet spiral and a gas line which is supplied from below and is deflected approximately at right angles directly in front of the inlet spiral.
  • Multi-stage cyclone heat exchangers are used, for example, as preheaters in cement kilns.
  • efforts are being made to further reduce the overall volume of the cyclones.
  • considerable separation problems arise.
  • the outer inlet spiral should extend over a circumferential angle of at least 180 °.
  • this requires a considerable volume and the weight of the cyclone.
  • the gas flow undergoes an approximately right-angled deflection before entering the cyclone, which leads to a separation of the dust in the gas and results in a particularly high dust accumulation in the uppermost part of the inlet spiral.
  • a known preheater (FR-A-1 454685) two cyclones are arranged directly one above the other, the funnel of the upper cyclone connecting to the gas outlet opening of the lower cyclone.
  • the gas supply line to this cyclone stage is split; one partial line opens into the lower cyclone and the other partial line opens into the upper cyclone.
  • the invention is based on the object of designing a cyclone of the type mentioned in such a way that the construction volume and the dead weight are substantially reduced with approximately the same pressure loss and degree of separation.
  • the invention thus makes use of the knowledge that, on the one hand, a longer separation path and a higher centrifugal force are required in the upper area of the entry spiral because of the higher dust load present there (due to the deflection of the gas flow in the gas supply line), and on the other hand a reduction in the length of the entry spiral in the lower area, a reduction in the diameter of the cyclone housing in this lower area, and thus a substantial reduction in the construction volume of the cyclone, is made possible.
  • the required height of the cyclone funnel depends on the diameter of the cyclone housing at the upper edge of the funnel; this housing diameter is significantly reduced by the subdivision of the entry spiral according to the invention and the lengthwise gradation of the partial spirals.
  • the entry spiral is expediently divided into at least three partial spirals, preferably of the same height.
  • the size of dust deposits on the crescent-shaped bottoms of the partial spirals depend on the size of the surface of these crescent-shaped bottoms. If the entry spiral is divided into several partial spirals, the bottom surface of the individual partial spirals is comparatively small, so that no disturbances due to dust deposits can occur.
  • the uppermost partial spiral expediently extends over a circumferential angle between 180 ° and 360 ° and the lowermost partial spiral over a circumferential angle between 90 and 180 °, preferably between 135 and 180 °.
  • the length of the partial spirals in between is graded accordingly.
  • the cyclone according to the invention is designed without an immersion tube (as is particularly expedient in the hottest stages of a multi-stage heat exchanger), all the partial spirals open into the diameter of the cyclone housing This corresponds to the diameter of the gas outlet opening of this cyclone.
  • all the partial spirals open out into the diameter of the cyclone housing, which corresponds to the diameter of the gas outlet opening of an equivalent cyclone designed without an dip tube.
  • the cyclone 1 shown in FIGS. 1 to 3 contains an inlet spiral 2, which is connected to a gas supply line, not shown, which is supplied from below and is deflected approximately at right angles, and which is divided into three partial spirals 3, 4 and 5 lying one above the other. These three partial spirals 3, 4 and 5 have a different length, decreasing from top to bottom.
  • the uppermost partial spiral 3 extends over a circumferential angle of approximately 270 °, the central partial spiral 4 over a circumferential angle of approximately 180 ° and the lowest partial spiral 5 over a circumferential angle of approximately 135 °.
  • All partial spirals 3, 4 and 5 open out in the diameter D of the cyclone housing, which corresponds to the diameter of the gas outlet opening 6 of this cyclone, which is designed without a dip tube.
  • a material discharge funnel 8 is connected to the lowest partial spiral 4 via a relatively short cylindrical connecting piece 7.
  • FIG. 4 differs from the cyclone shown in FIGS. 1 to 3 only in the presence of an immersion tube 9.
  • the diameter d of this immersion tube is somewhat smaller than the diameter D of the cyclone housing in which the partial spirals 3, 4 and 5 of the entry spiral 2 open out.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Cyclones (AREA)

Description

Die Erfindung betrifft einen Zyklon, insbesondere für mehrstufige Wärmetauscher, mit einer aussenliegenden Eintrittsspirale und einer von unten zugeführten, unmittelbar vor der Eintrittsspirale etwa rechtwinklig umgelenkten Gasleitung.The invention relates to a cyclone, in particular for multi-stage heat exchangers, with an external inlet spiral and a gas line which is supplied from below and is deflected approximately at right angles directly in front of the inlet spiral.

Mehrstufige Zyklonwärmetauscher werden beispielsweise als Vorwärmer in Zementbrennanlagen verwendet. In dem Bestreben, die Bauhöhe derartiger mehrstufiger Zyklonwärmetauscher zu verringern, versucht man, das Bauvolumen der Zyklone weiter zu verkleinern. Hierbei tauchen jedoch angesichts der hohen Staubbeladung der Gase in solchen Wärmetauschern erhebliche Abscheideprobleme auf.Multi-stage cyclone heat exchangers are used, for example, as preheaters in cement kilns. In an effort to reduce the overall height of such multi-stage cyclone heat exchangers, efforts are being made to further reduce the overall volume of the cyclones. However, given the high dust loading of the gases in such heat exchangers, considerable separation problems arise.

Um einen annehmbaren Abscheidegrad zu erreichen, sollte sich die aussenliegende Eintrittsspirale über einen Umfangswinkel von mindestens 180° erstrecken. Dies bedingt jedoch ein beträchtliches Bauvolumen und Eigengewicht des Zyklons. Hinzu kommt, dass beim Hintereinanderschalten mehrerer Zyklonstufen die Gasströmung vor Eintritt in den Zyklon eine etwa rechtwinklige Umlenkung erfährt, was zu einer Separation des Staubes im Gas führt und im obersten Teil der Eintrittsspirale eine besonders hohe Staubanreicherung zur Folge hat.In order to achieve an acceptable degree of separation, the outer inlet spiral should extend over a circumferential angle of at least 180 °. However, this requires a considerable volume and the weight of the cyclone. In addition, when several cyclone stages are connected in series, the gas flow undergoes an approximately right-angled deflection before entering the cyclone, which leads to a separation of the dust in the gas and results in a particularly high dust accumulation in the uppermost part of the inlet spiral.

Wird nun ein derartiger Zyklon sehr klein ausgeführt und wird wegen der hohen Betriebstemperaturen nur ein sehr kurzes oder überhaupt kein Tauchrohr eingebaut, so zeigen die praktischen Erfahrungen, dass sich in einem solchen Zyklon kaum noch ein die Abscheidung fördernder Wirbel ausgebildet. Der Wirbel wird vielmehr schon nach etwa einer halben Umdrehung aufgelöst und das Gas strömt durch die Austrittsöffnung zur nächsten Zyklonstufe. In den unteren zwei Dritteln der Bauhöhe des Zyklons erfolgt keine nennenswerte Staubabscheidung durch Wirbelbildung.If such a cyclone is now made very small and, because of the high operating temperatures, only a very short or no immersion tube is installed, practical experience shows that in such a cyclone there is hardly any vortex that promotes separation. Rather, the vortex is dissolved after about half a revolution and the gas flows through the outlet opening to the next cyclone stage. In the lower two thirds of the cyclone's height, there is no significant dust separation due to eddy formation.

Bei einem bekannten Vorwärmer (FR-A-1 454685) sind zwei Zyklone unmittelbar übereinander angeordnet, wobei sich die Trichter des oberen Zyklons an die Gasaustrittsöffnung des unteren Zyklons anschliesst. Die Gaszuleitung zu dieser Zyklonstufe ist geteilt ausgebildet; eine Teilleitung mündet in den unteren Zyklon und die andere Teilleitung in den oberen Zyklon ein.In a known preheater (FR-A-1 454685) two cyclones are arranged directly one above the other, the funnel of the upper cyclone connecting to the gas outlet opening of the lower cyclone. The gas supply line to this cyclone stage is split; one partial line opens into the lower cyclone and the other partial line opens into the upper cyclone.

Man hat bereits versucht(GB-A-473 484), durch eine bestimmte Bemessung eines konventionell ausgebildeten Zyklons den Abscheidegrad zu verbessern, ohne dabei die Abmessungen und den Druckverlust zu vergrössern.Attempts have already been made (GB-A-473 484) to improve the degree of separation by dimensioning a conventionally designed cyclone without increasing the dimensions and the pressure loss.

Es ist weiterhin bekannt (GB-A-354 608), die Eintrittsspirale eines Zyklons in mehrere horizontal nebeneinanderliegende Kanäle zu unterteilen, um den Zyklon auf Teil- bzw. Vollast einstellen zu können.It is also known (GB-A-354 608) to divide the entry spiral of a cyclone into a plurality of horizontally adjacent channels in order to be able to set the cyclone to partial or full load.

Schliesslich ist auch bereits eine Ausführung bekannt (DE-C-875 753), bei der die Gaszuleitung zum Zyklon nach der letzten Umlenkung unterteilt ist, wobei die staubreichere obere Strömung weitgehend tangential an einer verhältnismässig tief liegenden Stelle in den Zyklon eingeführt ist, während die staubärmere untere Strömung tangential an einen kleineren um die Zyklonachse gedachten Kreis sowie an einer höher gelegenen Stelle in den Zyklon eintritt.Finally, an embodiment is already known (DE-C-875 753) in which the gas supply to the cyclone is divided after the last deflection, the dust-laden upper flow being introduced into the cyclone largely tangentially at a relatively low point, while the Lower dust-free flow tangentially enters a smaller circle around the cyclone axis and at a higher point in the cyclone.

Der Erfindung liegt die Aufgabe zugrunde, einen Zyklon der eingangs genannten Art so auszubilden, dass bei etwa gleichem Druckverlust und Abscheidegrad das Bauvolumen und das Eigengewicht wesentlich verringert werden.The invention is based on the object of designing a cyclone of the type mentioned in such a way that the construction volume and the dead weight are substantially reduced with approximately the same pressure loss and degree of separation.

Diese Aufgabe wird erfindungsgemäss durch die Kombination folgender Merkmale gelöst:

  • a) die Eintrittsspirale ist in mehrere übereinander liegende Teilspiralen unterteilt;
  • b) die Teilspiralen besitzen eine unterschiedliche, von oben nach unten abnehmende Länge, wobei sich die oberste Teilspirale über einen Umfangswinkel von mindestens 180° und die unterste Teilspirale über einen Umfangswinkel von mindestens 90° erstreckt;
  • c) alle Teilspiralen münden in dem Durchmesser des Zyklongehäuses aus, der dem Durchmesser der Gasaustrittsöffnung eines ohne Tauchrohr ausgeführten Zyklons entspricht.
According to the invention, this object is achieved by combining the following features:
  • a) the entry spiral is divided into several partial spirals lying one above the other;
  • b) the partial spirals have a different length, decreasing from top to bottom, the uppermost partial spiral extending over a circumferential angle of at least 180 ° and the lowest partial spiral over a circumferential angle of at least 90 °;
  • c) all partial spirals open out in the diameter of the cyclone housing, which corresponds to the diameter of the gas outlet opening of a cyclone designed without a dip tube.

Die Erfindung macht damit von der Erkenntnis Gebrauch, dass einerseits im oberen Bereich der Eintrittsspirale wegen der dort (durch die Umlenkung der Gasströmung in der Gaszuleitung) vorhandenen höheren Staubbeladung ein längerer Abscheideweg und eine höhere Zentrifugalkraft erforderlich sind, während anderseits eine Verringerung der Länge der Eintrittsspirale im unteren Bereich eine Verkleinerung des Durchmessers des Zyklongehäuses in diesem unteren Bereich und damit eine wesentliche Verringerung des Bauvolumens des Zyklons ermöglicht. So hängt insbesondere die erforderliche Höhe des Zyklontrichters vom Durchmesser des Zyklongehäuses am oberen Trichterrand ab; dieser Gehäusedurchmesser wird durch die erfindungsgemässe Unterteilung der Eintrittsspirale und die längenmässige Abstufung der Teilspiralen wesentlich verkleinert.The invention thus makes use of the knowledge that, on the one hand, a longer separation path and a higher centrifugal force are required in the upper area of the entry spiral because of the higher dust load present there (due to the deflection of the gas flow in the gas supply line), and on the other hand a reduction in the length of the entry spiral in the lower area, a reduction in the diameter of the cyclone housing in this lower area, and thus a substantial reduction in the construction volume of the cyclone, is made possible. In particular, the required height of the cyclone funnel depends on the diameter of the cyclone housing at the upper edge of the funnel; this housing diameter is significantly reduced by the subdivision of the entry spiral according to the invention and the lengthwise gradation of the partial spirals.

Gemäss einer Ausführungsform wird die Eintrittsspirale zweckmässig in mindestens drei Teilspiralen von vorzugsweise gleicher Höhe unterteilt. Die Erfahrung hat dabei gezeigt, dass die Grösse von Staubablagerungen auf den sichelförmigen Böden der Teilspiralen von der Grösse der Fläche dieser sichelförmigen Böden abhängen. Wird die Eintrittsspirale in mehrere Teilspiralen unterteilt, so ergeben sich verhältnismässig kleine Bodenflächen der einzelnen Teilspiralen, so dass keine Störungen durch Staubablagerungen auftreten können.According to one embodiment, the entry spiral is expediently divided into at least three partial spirals, preferably of the same height. Experience has shown that the size of dust deposits on the crescent-shaped bottoms of the partial spirals depend on the size of the surface of these crescent-shaped bottoms. If the entry spiral is divided into several partial spirals, the bottom surface of the individual partial spirals is comparatively small, so that no disturbances due to dust deposits can occur.

Zweckmässig erstreckt sich die oberste Teilspirale über einen Umfangswinkel zwischen 180° und 360° und die unterste Teilspirale über einen Umfangswinkel zwischen 90 und 180°, vorzugsweise zwischen 135 und 180°. Die dazwischen liegenden Teilspiralen werden in ihrer Länge entsprechend abgestuft.The uppermost partial spiral expediently extends over a circumferential angle between 180 ° and 360 ° and the lowermost partial spiral over a circumferential angle between 90 and 180 °, preferably between 135 and 180 °. The length of the partial spirals in between is graded accordingly.

Wird der erfindungsgemässe Zyklon ohne Tauchrohr ausgeführt (wie dies besonders in den heissesten Stufen eines mehrstufigen Wärmetauschers zweckmässig ist), so münden alle Teilspiralen in dem Durchmesser des Zyklongehäuses aus, der dem Durchmesser der Gasaustrittsöffnung dieses Zyklons entspricht. Bei einem mit Tauchrohr ausgebildeten Zyklon münden anderseits alle Teilspiralen in den Durchmesser des Zyklongehäuses aus, der dem Durchmesser der Gasaustrittsöffnung eines äquivalenten, ohne Tauchrohr ausgeführten Zyklons entspricht.If the cyclone according to the invention is designed without an immersion tube (as is particularly expedient in the hottest stages of a multi-stage heat exchanger), all the partial spirals open into the diameter of the cyclone housing This corresponds to the diameter of the gas outlet opening of this cyclone. In the case of a cyclone designed with a dip tube, on the other hand, all the partial spirals open out into the diameter of the cyclone housing, which corresponds to the diameter of the gas outlet opening of an equivalent cyclone designed without an dip tube.

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung veranschaulicht. Es zeigen:

  • Fig. 1 einen Horizontalschnitt (längs der Linie I-I der Fig. 2) durch ein erstes Ausführungsbeispiel, eines erfindungsgemässen Zyklons,
  • Fig. 2 einen Vertikalschnitt längs der Linie 11-11 der Fig. 1,
  • Fig. 3 einen Vertikalschnitt längs der Linie III-III der Fig. 1,
  • Fig. 4 einen Schnitt (entsprechend Fig. 2) durch ein weiteres Ausführungsbeispiel des erfindungsgemässen Zyklons.
Two embodiments of the invention are illustrated in the drawing. Show it:
  • 1 is a horizontal section (along the line II of FIG. 2) through a first embodiment, a cyclone according to the invention,
  • 2 is a vertical section along the line 11-11 of FIG. 1,
  • 3 is a vertical section along the line III-III of FIG. 1,
  • Fig. 4 shows a section (corresponding to Fig. 2) through a further embodiment of the cyclone according to the invention.

Der in den Fig. 1 bis 3 dargestellte Zyklon 1 enthält-anschliessend an eine nicht dargestellte, von unten zugeführte und etwa rechtwinklig umgelenkte Gaszuleitung - eine Eintrittsspirale 2, die in drei übereinanderliegende Teilspiralen 3, 4 und 5 unterteilt ist. Diese drei Teilspiralen 3, 4 und 5 besitzen eine unterschiedliche, von oben nach unten abnehmende Länge. Die oberste Teiispirale 3 erstreckt sich über einen Umfangswinkel von etwa 270°, die mittlere Teilspirale 4 über einen Umfangswinkel von etwa 180° und die unterste Teilspirale 5 über einen Umfangswinkel von etwa 135°.The cyclone 1 shown in FIGS. 1 to 3 contains an inlet spiral 2, which is connected to a gas supply line, not shown, which is supplied from below and is deflected approximately at right angles, and which is divided into three partial spirals 3, 4 and 5 lying one above the other. These three partial spirals 3, 4 and 5 have a different length, decreasing from top to bottom. The uppermost partial spiral 3 extends over a circumferential angle of approximately 270 °, the central partial spiral 4 over a circumferential angle of approximately 180 ° and the lowest partial spiral 5 over a circumferential angle of approximately 135 °.

Alle Teilspiralen 3, 4 und 5 münden in dem Durchmesser D des Zyklongehäuses aus, der dem Durchmesser der Gasaustrittsöffnung 6 dieses ohne Tauchrohr ausgeführten Zyklons entspricht.All partial spirals 3, 4 and 5 open out in the diameter D of the cyclone housing, which corresponds to the diameter of the gas outlet opening 6 of this cyclone, which is designed without a dip tube.

An die unterste Teilspirale 4 schliesst sich über ein verhältnismässig kurzes zylindrisches Verbindungsstück 7 ein Gutaustragstrichter 8 an.A material discharge funnel 8 is connected to the lowest partial spiral 4 via a relatively short cylindrical connecting piece 7.

Das in Fig. 4 dargestellte Ausführungsbeispiel unterscheidet sich von dem in den Fig. 1 bis 3 dargestellten Zyklon lediglich durch das Vorhandensein eines Tauchrohres 9. Der Durchmesser d dieses Tauchrohres ist etwas kleiner als der Durchmesser D des Zyklongehäuses, in dem die Teilspiralen 3, 4 und 5 der Eintrittsspirale 2 ausmünden.The embodiment shown in FIG. 4 differs from the cyclone shown in FIGS. 1 to 3 only in the presence of an immersion tube 9. The diameter d of this immersion tube is somewhat smaller than the diameter D of the cyclone housing in which the partial spirals 3, 4 and 5 of the entry spiral 2 open out.

In der obigen Beschreibung wurde zur Vereinfachung der Erläuterung von einer vertikalen Ausrichtung der Zyklonachse ausgegangen. Es ist selbstverständlich im Rahmen der Erfindung möglich, den Zyklon auch mit einer beliebigen Achsneigung anzuordnen. Die in der Beschreibung der Eintrittsspirale verwendeten Ausdrücke («oberste" bzw. «unterste,, Teilspirale) sind dann sinngemäss anzupassen.In the above description, a vertical orientation of the cyclone axis was assumed to simplify the explanation. It is of course possible within the scope of the invention to arrange the cyclone with any axis inclination. The expressions used in the description of the entry spiral ("top " or "bottom" partial spiral) must then be adapted accordingly.

Claims (5)

1. A cyclone, more particularly for multistage heat exchangers, comprising an externally arranged inlet spiral and a gas pipe which is fed from below and which is bent substantially at a right angle immediately before the inlet spiral, characterised by combination of the following features:
a) the inlet spiral (2) is divided up into several partial spirals (3, 4, 5) lying one above the other;
b) the partial spirals (3, 4, 5) have a different length which decreases downwards, the uppermost partial spiral (3) extending over a peripheral angle of at least 180° and the lowermost partial spiral (5) extending over a peripheral angle of at least 90°;
c) all the partial spirals (3, 4, 5) open in that diameter (D) of the cyclone housing which corresponds to the diameter of the gas outlet opening (6) of a cyclone made without a dip pipe.
2. A cyclone as claimed in Claim 1, characterised in that the inlet spiral (2) is divided into at least two and preferably three partial spirals (3, 4, 5) of preferably equal height.
3. A cyclone as claimed in Claim 1, characterised in that the uppermost partial spiral (3) extends over a peripheral angle of from 180° to 360°.
4. A cyclone as claimed in Claim 1, characterised in that the lowermost partial spiral (5) extends over a peripheral angle of from 90 to 180° and preferably from 135 to 180°.
5. A cyclone as claimed in Claim 1 containing a dip pipe, characterised in that all the partial spirals (3, 4 5) open in that diameter (D) of the cyclone housing which corresponds to the diameter of the gas outlet opening of an equivalent cyclone made without a dip pipe (9).
EP81102125A 1980-05-14 1981-03-20 Cyclone, especially for multi-stage heat exchanger Expired EP0039767B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803018519 DE3018519A1 (en) 1980-05-14 1980-05-14 CYCLE, ESPECIALLY FOR MULTI-STAGE HEAT EXCHANGERS
DE3018519 1980-05-14

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EP0039767A2 EP0039767A2 (en) 1981-11-18
EP0039767A3 EP0039767A3 (en) 1982-09-15
EP0039767B1 true EP0039767B1 (en) 1985-02-06

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EP81102125A Expired EP0039767B1 (en) 1980-05-14 1981-03-20 Cyclone, especially for multi-stage heat exchanger

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US (1) US4344783A (en)
EP (1) EP0039767B1 (en)
JP (2) JPS5710363A (en)
KR (1) KR830005551A (en)
BR (1) BR8102980A (en)
DE (2) DE3018519A1 (en)
DK (1) DK215481A (en)
ES (1) ES272448Y (en)
IN (1) IN155716B (en)
ZA (1) ZA812693B (en)

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Also Published As

Publication number Publication date
JPS5916134Y2 (en) 1984-05-12
JPS5895251U (en) 1983-06-28
US4344783A (en) 1982-08-17
DE3018519A1 (en) 1981-11-19
ES272448Y (en) 1984-09-01
ES272448U (en) 1984-02-01
EP0039767A3 (en) 1982-09-15
IN155716B (en) 1985-02-23
JPS5710363A (en) 1982-01-19
DE3168718D1 (en) 1985-03-21
BR8102980A (en) 1982-02-02
DK215481A (en) 1981-11-15
EP0039767A2 (en) 1981-11-18
ZA812693B (en) 1982-06-30
KR830005551A (en) 1983-08-20

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