EP0127733B1 - Rotary-drum furnace having a cooler - Google Patents

Rotary-drum furnace having a cooler Download PDF

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Publication number
EP0127733B1
EP0127733B1 EP84102518A EP84102518A EP0127733B1 EP 0127733 B1 EP0127733 B1 EP 0127733B1 EP 84102518 A EP84102518 A EP 84102518A EP 84102518 A EP84102518 A EP 84102518A EP 0127733 B1 EP0127733 B1 EP 0127733B1
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EP
European Patent Office
Prior art keywords
outlet head
rotary drum
kiln outlet
kiln
cooler
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
EP84102518A
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German (de)
French (fr)
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EP0127733A2 (en
EP0127733A3 (en
Inventor
Heinz Ing. Grachtrup (Grad.)
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ThyssenKrupp Industrial Solutions AG
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Krupp Polysius AG
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Publication of EP0127733A2 publication Critical patent/EP0127733A2/en
Publication of EP0127733A3 publication Critical patent/EP0127733A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices

Definitions

  • the invention relates to a rotary kiln
  • Cooler according to the preamble of claim 1. It belongs to the general state of the art that material fired in a rotary kiln is fed to a downstream cooler via a stationary kiln outlet head assigned to the outlet end of the rotary tube and an inlet shaft arranged below it.
  • One end of the stationary furnace outlet head encompasses the edge area of the rotary tube end facing it sufficiently far to ensure a sufficient seal in this area.
  • a sealable parting line is also provided so that changes in length of the furnace due to temperature influences and resulting displacements of the furnace outlet head can be largely absorbed.
  • the drop height of the fired material While in rotary kilns with relatively small dimensions, the drop height of the fired material generally remains within reasonable limits and the separating joint to be sealed between the furnace outlet head and the cooler inlet shaft can be arranged approximately horizontally (which generally ensures sufficient displaceability of the furnace outlet head during operation), In the case of larger rotary kilns, there are often considerable problems with respect to the acceptable drop height of the fired material.
  • this oblique separation joint allows only a very limited displaceability of the kiln outlet head in the longitudinal direction of the kiln, which has several disadvantages: If the rotary tube is elongated excessively (due to the heating), sufficient compensation due to the displaceability of the head is not always guaranteed with the necessary security , whereby it should be noted that the inclined parting line, which must accommodate the length of the furnace during the compensation, should at the same time seal the connection point between the furnace outlet head and the inlet shaft and should therefore not be excessively large, but on the other hand, if the width is too small, the length expansion option or can hinder their compensation by the furnace outlet head; Due to this low displaceability of the furnace outlet head, the collar overlapping the rotary tube end must be dismantled approximately in sections so that the corresponding rotary tube end is accessible for maintenance work.
  • the invention is therefore based on the object of designing a rotary kiln of the type required in the preamble of claim 1 in its transition region to the cooler in such a way that even with larger furnace dimensions and with sufficient displacement of the furnace outlet head, a relatively small drop height for the firing material can be maintained .
  • the gradations formed on both sides of the furnace outlet head and cooler inlet duct each result in an equally large side opening, the side openings on both sides of the furnace outlet head and inlet duct being able to lie opposite one another.
  • These closable side openings ensure, on the one hand, that the furnace outlet head can be moved sufficiently in the longitudinal direction of the furnace (to the extent that the outlet end of the rotary tube can be made freely accessible for maintenance purposes), and, on the other hand, together with the separating joint sections located at different heights, they enable a sufficiently low firing head , since the end of the radiator inlet shaft opposite the end of the rotary kiln can be made relatively high.
  • the rotatably mounted rotary tube 2 is illustrated in FIG. 1 with its outlet end 2a and the stationary furnace outlet head 3 assigned to this end 2a.
  • the rotary tube furnace 1 is followed by a cooler 4, which is connected to the furnace outlet head 3 via an inlet shaft 5, which in the exemplary embodiment shown is part of the cooler itself; however, it can also be designed as an independent inlet shaft between the actual cooler inlet and the furnace outlet head.
  • the cooler 4 is illustrated in the form of a moving grate cooler; However, this cooler downstream of the rotary kiln 1 can be any other suitable design, for example a traveling grate cooler, a drum cooler and the like.
  • the stationary furnace outlet head 3 can be displaced or moved to a limited extent on cylindrical rollers 6 in the longitudinal direction of the rotary kiln 1 (see longitudinal axis 1 a), whereby it is supported on a standing surface by means of these cylindrical rollers 6, through the top 7a of a building ceiling 7 provided here is formed.
  • the end of the furnace outlet head 3 facing the end of the rotary tube 2a is designed in the form of a collar part 3a, which encircles the edge region of this end of the rotary tube 2a with its protective segments 8 provided there in the usual manner, a type of seal - as is generally known - being created.
  • the burner lance (not shown in more detail) can be inserted into the outlet-side rotary tube end 2a in a conventional manner.
  • the side walls 3c, 3d and 5a, 5b of the furnace outlet head 3 and the cooler inlet shaft 5 are formed in the area of the connection point with interlocking steps 10 and 11, which run approximately vertically and are essentially the same height, so that the steps 10 in the side walls 3c , 3d of the furnace outlet head 3 with the gradations 11 in the side walls 5a, 5b of the inlet shaft 5 interlock approximately correspondingly with one another.
  • steps 10 in the side walls 3c , 3d of the furnace outlet head 3 with the gradations 11 in the side walls 5a, 5b of the inlet shaft 5 interlock approximately correspondingly with one another.
  • the two mutually opposite gradations 10, 11 have a horizontal distance a from one another on each longitudinal side of the furnace outlet head 3 and inlet shaft 5, so that a side opening 12 is formed between each of these gradations 10, 11, whose horizontal width corresponds to the distance a and whose vertical height h corresponds approximately to the height of the gradations 10, 11.
  • Said horizontal distance a between the two mutually opposite gradations 10, 11 also corresponds in the operating position of the furnace outlet head 3 shown in solid lines in FIG.
  • each side wall 3c, 3d or 5a, 5b of furnace outlet head 3 and inlet shaft 5 only has a correspondingly high level Gradation 10 or 11 and a side opening 12 formed between them is provided.
  • the deeper parting joint section 9a runs at a height in the area below the outlet-side rotary tube end 2a, namely it extends horizontally from the area of the end faces facing the rotary tube 2 below the collar part 3a and opens directly into the lower end of the two side openings 12 in the upper height separating joint section 9b approximately at the level of the standing surface 7a of the furnace outlet head 3, whereby it is horizontal from the area of the end faces opposite the rotary tube end 2a (for example 3b) and opens directly into the upper end of the side openings 12.
  • each parting line section 9a or 9b runs in its height approximately over the entire associated peripheral section, i.e. In the exemplary embodiment illustrated in FIG. 1 with side openings 12 arranged approximately in the region of the longitudinal center, each parting line section 9a or 9b extends approximately over half the circumference in the region of the connection point.
  • the height b of the parting line 9 is dimensioned such that vertical expansions caused by temperature influences can also be sufficiently compensated for in this area.
  • the parting line 9 is expediently sealed by means of a conventional ceramic fiber seal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)

Description

Die Erfindung betrifft einen Drehrohrofen mitThe invention relates to a rotary kiln

Kühler gemäss dem Oberbegriff des Anspruches 1. Es gehört zum allgemeinen Stand der Technik, dass in einem Drehrohrofen gebranntes Gut über einen dem auslaufseitigen Drehrohrende zugeordneten, stationären Ofenauslaufkopf und einen hierunter angeordneten Einlaufschacht einem nachgeschalteten Kühler zugeleitet wird. Der stationäre Ofenauslaufkopf umfasst mit seinem einen Ende den Randbereich des ihm zugewandten Drehrohrendes ausreichend weit, damit eine genügende Abdichtung in diesem Bereich gewährleistet ist. An der Verbindungsstelle zwischen diesem Ofenauslaufkopf und dem Einlaufschacht ist ferner eine abdichtbare Trennfuge so vorgesehen, dass auf Temperatureinflüsse zurückzuführende Längenänderungen des Ofens sowie daraus resultierende Verschiebungen des Ofenauslaufkopfes weitgehend aufgenommen werden können.Cooler according to the preamble of claim 1. It belongs to the general state of the art that material fired in a rotary kiln is fed to a downstream cooler via a stationary kiln outlet head assigned to the outlet end of the rotary tube and an inlet shaft arranged below it. One end of the stationary furnace outlet head encompasses the edge area of the rotary tube end facing it sufficiently far to ensure a sufficient seal in this area. At the connection point between this furnace outlet head and the inlet shaft, a sealable parting line is also provided so that changes in length of the furnace due to temperature influences and resulting displacements of the furnace outlet head can be largely absorbed.

Bei diesen Drehrohröfen mit Kühler ist nun zu beachten, dass eine möglichst niedrige Fallhöhe für das aus dem Drehrohrende in den Kühler fallende Gut eingehalten wird, und zwar zum einen, weil bei relativ grossen Fallhöhen die Staubbelastung der im Gegenstrom zum Brenngut nach oben steigenden Luft unerwünscht hoch wird (übermässige Staubbelastung im Brennprozess bzw. in zugeordneten Staubabscheideeinrichtungen), und zum anderen deswegen, weil das Brenngut vielfach in verhältnismässig grossen und schweren Klumpen aus dem Drehrohrende ausfällt und beim Aufprall-auf den Kühlereinrichtungen dort zu erheblichen mechanischen Belastungen führen kann. Während bei Drehrohröfen mit relativ kleinen Abmessungen die Fallhöhe des Brenngutes im allgemeinen innerhalb vertretbarer Grenzen bleibt und dabei die abzudichtende Trennfuge zwischen Ofenauslaufkopf und Kühlereinlaufschacht etwa horizontal verlaufend angeordnet werden kann (wodurch in der Regel eine während des Betriebes ausreichende Verschiebbarkeit des Ofenauslaufkopfes gewährleistet werden kann), treten bei grösseren Drehrohröfen vielfach erhebliche Probleme hinsichtlich der Einhaltung der vertretbaren Fallhöhe des Brenngutes auf. Um diese Fallhöhe möglichst klein zu halten, ist man bei grösseren und grossen Drehrohröfen in der Praxis dazu übergegangen, die an der Verbindungsstelle zwischen Ofenauslaufkopf und Einlaufschacht vorhandene Trennfuge schräg verlaufend auszubilden, wodurch die dem auslaufseitigen Drehrohrende entgegengesetzte Stirnseite des Einlaufschachtes entsprechend höher und die zugehörige Stirnwand des Ofenauslaufkopfes entsprechend niedriger ist, so dass die Fallhöhe relativ klein gehalten werden kann. Diese schräg verlaufende Trennfuge lässt jedoch nur eine sehr eingeschränkte Verschiebbarkeit des Ofenauslaufkopfes in Ofenlängsrichtung zu, was mit einigen Nachteilen verbunden ist: Bei übermässiger Längung des Drehrohres (aufgrund der Erwärmung) ist ein ausreichender Ausgleich durch die Verschiebbarkeit des Kopfes nicht immer mit der erforderlichen Sicherheit gewährleistet, wobei zu beachten ist, dass die schrägverlaufende Trennfuge, die die Längenausdehnung des Ofens bei der Kompensation mit aufnehmen muss, gleichzeitig die Verbindungsstelle zwischen Ofenauslaufkopf und Einlaufschacht abdichten soll und daher nicht übermässig gross sein darf, andererseits jedoch bei zu kleiner Weite die Längenausdehnungsmöglichkeit bzw. deren Kompensation durch den Ofenauslaufkopf behindern kann; aufgrund dieser geringen Verschiebbarkeit des Ofenauslaufkopfes muss dessen das Drehrohrende übergreifender Kragen etwa sektionsweise demontierbar sein, damit das entsprechende Drehrohrende für Wartungsarbeiten zugänglich wird.With these rotary kilns with a cooler, it must now be ensured that the lowest possible drop height is observed for the material falling from the end of the rotary tube into the cooler, on the one hand, because with relatively large drop heights, the dust pollution of the air rising in counterflow to the firing material is undesirable becomes high (excessive dust load in the combustion process or in assigned dust collection devices), and on the other hand because the material to be burned often falls out of the rotary tube end in relatively large and heavy lumps and can cause considerable mechanical loads there on impact with the cooler devices. While in rotary kilns with relatively small dimensions, the drop height of the fired material generally remains within reasonable limits and the separating joint to be sealed between the furnace outlet head and the cooler inlet shaft can be arranged approximately horizontally (which generally ensures sufficient displaceability of the furnace outlet head during operation), In the case of larger rotary kilns, there are often considerable problems with respect to the acceptable drop height of the fired material. In order to keep this height of fall as small as possible, in practice with larger and larger rotary kilns it has been adopted in practice to form the parting line existing at the connection point between the furnace outlet head and the inlet shaft, so that the end of the inlet shaft opposite the end of the outlet on the outlet side is correspondingly higher and the associated front wall of the furnace outlet head is correspondingly lower, so that the head can be kept relatively small. However, this oblique separation joint allows only a very limited displaceability of the kiln outlet head in the longitudinal direction of the kiln, which has several disadvantages: If the rotary tube is elongated excessively (due to the heating), sufficient compensation due to the displaceability of the head is not always guaranteed with the necessary security , whereby it should be noted that the inclined parting line, which must accommodate the length of the furnace during the compensation, should at the same time seal the connection point between the furnace outlet head and the inlet shaft and should therefore not be excessively large, but on the other hand, if the width is too small, the length expansion option or can hinder their compensation by the furnace outlet head; Due to this low displaceability of the furnace outlet head, the collar overlapping the rotary tube end must be dismantled approximately in sections so that the corresponding rotary tube end is accessible for maintenance work.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Drehrohrofen der im Oberbegriff des Anspruches 1 vorausgesetzten Art in seinem Übergangsbereich zum Kühler auf einfache Weise so auszubilden, dass auch bei grösseren Ofenabmessungen und bei ausreichender Verschiebbarkeit des Ofenauslaufkopfes eine relativ kleine Fallhöhe für das Brenngut eingehalten werden kann.The invention is therefore based on the object of designing a rotary kiln of the type required in the preamble of claim 1 in its transition region to the cooler in such a way that even with larger furnace dimensions and with sufficient displacement of the furnace outlet head, a relatively small drop height for the firing material can be maintained .

Diese Aufgabe wird erfindungsgemäss durch die im Kennzeichen des Anspruches 1 angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in the characterizing part of claim 1.

Bei dieser erfindungsgemässen Ausführungsform ergibt sich durch die auf beiden Seiten von Ofenauslaufkopf und Kühlereinlaufschacht ausgebildeten Abstufungen jeweils eine gleichgrosse Seitenöffnung, wobei die Seitenöffnungen auf beiden Seiten von Ofenauslaufkopf und Einlaufschacht sich einander gegenüberliegen können. Diese verschliessbaren Seitenöffnungen gewährleisten einerseits eine ausreichende Verschiebbarkeit des Ofenauslaufkopfes in Ofenlängsrichtung (und zwar auch so weit, dass das auslaufseitige Drehrohrende für Wartungszwecke frei zugänglich gemacht werden kann), und andererseits ermöglichen sie zusammen mit den in unterschiedlichen Höhenlagen befindlichen Trennfugenabschnitten eine ausreichend niedrige Brenngut-Fallhöhe, da die dem Drehrohrofenende entgegengesetzte Stirnseite des Kühlereinlaufschachtes verhältnismässig hoch ausgebildet werden kann.In this embodiment according to the invention, the gradations formed on both sides of the furnace outlet head and cooler inlet duct each result in an equally large side opening, the side openings on both sides of the furnace outlet head and inlet duct being able to lie opposite one another. These closable side openings ensure, on the one hand, that the furnace outlet head can be moved sufficiently in the longitudinal direction of the furnace (to the extent that the outlet end of the rotary tube can be made freely accessible for maintenance purposes), and, on the other hand, together with the separating joint sections located at different heights, they enable a sufficiently low firing head , since the end of the radiator inlet shaft opposite the end of the rotary kiln can be made relatively high.

Weitere Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie aus der folgenden Beschreibung eines in der Zeichnung veranschaulichten Ausführungsbeispieles. Es zeigen

  • Fig. 1 eine Längsschnittansicht durch einen Teil des Drehrohrofens im Übergangsbereich zum Kühler (Schnittlinie etwa entlang der Linie I-I in Fig. 2);
  • Fig. 2 eine Querschnittansicht entlang der Linie 11-11 in Fig. 1.
Further details of the invention emerge from the subclaims and from the following description of an exemplary embodiment illustrated in the drawing. Show it
  • Figure 1 is a longitudinal sectional view through part of the rotary kiln in the transition region to the cooler (section line approximately along the line II in Fig. 2).
  • FIG. 2 is a cross-sectional view taken along line 11-11 in FIG. 1.

In der Zeichnung sind im wesentlichen nur die zur Erläuterung der Erfindung wesentlichen Teile veranschaulicht, d.h. Brennerlanze, Drehrohrofenantrieb und -lagerung und Kühlerantrieb sowie zugeordnete Gebläse- und Abscheideeinrichtungen sind der Übersichtlichkeit wegen fortgelassen.In the drawing, essentially only the parts essential for explaining the invention are illustrated, ie burner lance, rotary kiln drive and bearing and cooler drive as well as associated blower and separating devices are omitted for the sake of clarity.

Von dem Drehrohrofen 1 ist in Fig. 1 das drehbeweglich gelagerte Drehrohr 2 mit seinem auslaufseitigen Ende 2a sowie der diesem Ende 2a zugeordnete, stationäre Ofenauslaufkopf 3 veranschaulicht. Dem Drehrohrofen 1 ist ein Kühler 4 nachgeschaltet, der mit dem Ofenauslaufkopf 3 über einen Einlaufschacht 5 in Verbindung steht, der im dargestellten Ausführungsbeispiel einen Teil des Kühlers selbst darstellt; er kann jedoch auch als selbständiger Einlaufschacht zwischen dem eigentlichen Kühlereinlauf und dem Ofenauslaufkopf ausgebildet sein. In Fig. 1 ist der Kühler 4 in Form eines Schubrostkühlers veranschaulicht; es kann sich jedoch bei diesem dem Drehrohrofen 1 nachgeschalteten Kühler um jede andere geeignete Ausführung handeln, beispielsweise um einen Wanderrostkühler, einen Trommelkühler und dgl....Of the rotary kiln 1, the rotatably mounted rotary tube 2 is illustrated in FIG. 1 with its outlet end 2a and the stationary furnace outlet head 3 assigned to this end 2a. The rotary tube furnace 1 is followed by a cooler 4, which is connected to the furnace outlet head 3 via an inlet shaft 5, which in the exemplary embodiment shown is part of the cooler itself; however, it can also be designed as an independent inlet shaft between the actual cooler inlet and the furnace outlet head. In Fig. 1, the cooler 4 is illustrated in the form of a moving grate cooler; However, this cooler downstream of the rotary kiln 1 can be any other suitable design, for example a traveling grate cooler, a drum cooler and the like.

Der stationäre Ofenauslaufkopf 3 ist - wie in Fig. 2 angedeutet - auf Zylinderrollen 6 in Längsrichtung des Drehrohrofens 1 (vgl. Ofenlängsachse 1 a) begrenzt verschiebbar bzw. verfahrbar, wobei er sich mittels dieser Zylinderrollen 6 auf einer Standfläche abstützt, die durch die Oberseite 7a einer hier vorgesehenen Gebäudedecke 7 gebildet wird. Das dem Drehrohrende 2a zugewandte stirnseitige Ende des Ofenauslaufkopfes 3 ist in Form eines Kragenteiles 3a ausgebildet, das den Randbereich dieses Drehrohrendes 2a mit seinen dort in üblicher Weise vorgesehenen Schutzsegmenten 8 ringförmig umfasst, wobei eine Art Abdichtung - wie allgemein bekannt - geschaffen wird. Durch die entgegengesetzte, rückwärtige Stirnwand 3b des Ofenauslaufkopfes 3 kann in üblicher Weise die nicht näher veranschaulichte Brennerlanze in das auslaufseitige Drehrohrende 2a eingeführt werden.As indicated in FIG. 2, the stationary furnace outlet head 3 can be displaced or moved to a limited extent on cylindrical rollers 6 in the longitudinal direction of the rotary kiln 1 (see longitudinal axis 1 a), whereby it is supported on a standing surface by means of these cylindrical rollers 6, through the top 7a of a building ceiling 7 provided here is formed. The end of the furnace outlet head 3 facing the end of the rotary tube 2a is designed in the form of a collar part 3a, which encircles the edge region of this end of the rotary tube 2a with its protective segments 8 provided there in the usual manner, a type of seal - as is generally known - being created. Through the opposite, rear end wall 3b of the furnace outlet head 3, the burner lance (not shown in more detail) can be inserted into the outlet-side rotary tube end 2a in a conventional manner.

An der Verbindungsstelle zwischen Ofenauslaufkopf 3 und Kühlereinlaufschacht 5 (also an der Unterseite des Ofenauslaufkopfes und an dem oberen Ende des Einlaufschachtes) ist eine in zwei Abschnitte 9a, 9b unterteilte Trennfuge 9 vorhanden, deren Verlauf weiter unten noch näher erläutert wird.At the connection point between the furnace outlet head 3 and the cooler inlet shaft 5 (i.e. on the underside of the furnace outlet head and at the upper end of the inlet shaft) there is a parting line 9 divided into two sections 9a, 9b, the course of which is explained in more detail below.

Die Seitenwände 3c, 3d bzw. 5a, 5b von Ofenauslaufkopf 3 und Kühlereinlaufschacht 5 sind im Bereich der genannten Verbindungsstelle mit ineinandergreifenden Abstufungen 10 bzw. 11 ausgebildet, die etwa senkrecht verlaufen und im wesentlichen gleichhoch sind, so dass die Abstufungen 10 in den Seitenwänden 3c, 3d des Ofenauslaufkopfes 3 mit den Abstufungen 11 in den Seitenwänden 5a, 5b des Einlaufschachtes 5 etwa miteinander korrespondierend ineinandergreifen. Wie sich aus Fig. 1 gut erkennen lässt, weisen die beiden einander gegenüberliegenden Abstufungen 10, 11 auf jeder Längsseite von Ofenauslaufkopf 3 und Einlaufschacht 5 einen horizontalen Abstand a voneinander auf, so dass zwischen diesen Abstufungen 10, 11 je eine Seitenöffnung 12 gebildet ist, deren horizontale Breite dem genannten Abstand a und deren senkrechte Höhe h etwa der Höhe der Abstufungen 10, 11 entspricht. Der genannte horizontale Abstand a zwischen den beiden einander gegenüberliegenden Abstufungen 10,11 entspricht ferner in der in Fig. 1 mit ausgezogenen Linien gezeigten Betriebsstellung des Ofenauslaufkopfes 3 dem maximalen Verschiebeweg dieses Ofenauslaufkopfes 3 in Richtung des Pfeiles 13, wenn also - bei Stillstand des Drehrohrofens 1 - der Ofenauslaufkopf 3 vom Drehrohrende 2a weggeschoben wird, wie es in Fig. 1 strichpunktiert angedeutet ist. Dieses Verschieben des Ofenauslaufkopfes 3 ist beispielsweise erforderlich, um das auslaufseitige Drehrohrende 2a und die dort vorhandenen Schutzsegmente 8 für Wartungszwecke zugänglich zu machen. Im Betriebszustand des Drehrohrofens 1 und somit in der Betriebsstellung des Ofenauslaufkopfes 3 ist dagegen - wie erwähnt - zwischen den Abstufungen 10, 11 der horizontale Abstand a vorhanden, wobei jedoch die beiden zwischen den beiden Abstufungen 10, 11 gebildeten Seitenöffnungen 12 mit herausnehmbaren Schamottesteinen 14 zugestellt sind. Diese Schamottesteine-Zustellung bietet die Möglichkeit, die Seitenöffnungen 12 einerseits während des Ofenbetriebes ausreichend zu verschliessen und andererseits - durch Herausnehmen der Schamottesteine - im Bedarfsfalle rasch zu öffnen, um dadurch die volle Verschiebbarkeit des Ofenauslaufkopfes um das Abstandsmass a herbeizuführen. Der maximale Verschiebeweg (Abstand a) des Ofenauslaufkopfes 3 ist zweckmässig der Grösse für eine freie Zugänglichkeit im Bereich zwischen Ofenauslaufkopf 3 und dem auslaufseitigen Ende 2a des Drehrohres 2 angepasst.The side walls 3c, 3d and 5a, 5b of the furnace outlet head 3 and the cooler inlet shaft 5 are formed in the area of the connection point with interlocking steps 10 and 11, which run approximately vertically and are essentially the same height, so that the steps 10 in the side walls 3c , 3d of the furnace outlet head 3 with the gradations 11 in the side walls 5a, 5b of the inlet shaft 5 interlock approximately correspondingly with one another. As can be clearly seen from FIG. 1, the two mutually opposite gradations 10, 11 have a horizontal distance a from one another on each longitudinal side of the furnace outlet head 3 and inlet shaft 5, so that a side opening 12 is formed between each of these gradations 10, 11, whose horizontal width corresponds to the distance a and whose vertical height h corresponds approximately to the height of the gradations 10, 11. Said horizontal distance a between the two mutually opposite gradations 10, 11 also corresponds in the operating position of the furnace outlet head 3 shown in solid lines in FIG. 1 to the maximum displacement path of this furnace outlet head 3 in the direction of arrow 13, that is to say when the rotary kiln 1 is at a standstill - The furnace outlet head 3 is pushed away from the end of the rotary tube 2a, as is indicated by dash-dotted lines in FIG. 1. This shifting of the furnace outlet head 3 is necessary, for example, in order to make the outlet-side rotary tube end 2a and the protective segments 8 present there accessible for maintenance purposes. In the operating state of the rotary kiln 1 and thus in the operating position of the kiln outlet head 3, on the other hand - as mentioned - there is a horizontal distance a between the gradations 10, 11, but the two side openings 12 formed between the two gradations 10, 11 are delivered with removable firebricks 14 are. This delivery of firebricks offers the possibility, on the one hand, of sufficiently closing the side openings 12 during furnace operation and, on the other hand, of opening them quickly by removing the firebricks, if necessary, in order to bring about the full displacement of the furnace outlet head by the distance a. The maximum displacement (distance a) of the furnace outlet head 3 is expediently adapted to the size for free access in the area between the furnace outlet head 3 and the outlet-side end 2a of the rotary tube 2.

Selbst wenn im Bereich jeder Längsseite von Ofenauslaufkopf 3 und Einlaufschacht 5 mehrere der genannten Abstufungen denkbar sind, so ist für die gewünschte Verschiebbarkeit vollkommen ausreichend, wenn in jeder Seitenwand 3c, 3d bzw. 5a, 5b von Ofenauslaufkopf 3 und Einlaufschacht 5 nur eine entsprechend hohe Abstufung 10 bzw. 11 sowie eine dazwischen gebildete Seitenöffnung 12 vorgesehen ist.Even if several of the above-mentioned gradations are conceivable in the area of each longitudinal side of the furnace outlet head 3 and inlet shaft 5, it is completely sufficient for the desired displaceability if each side wall 3c, 3d or 5a, 5b of furnace outlet head 3 and inlet shaft 5 only has a correspondingly high level Gradation 10 or 11 and a side opening 12 formed between them is provided.

Wichtig ist vielmehr die Ausbildung und der Verlauf der Trennfuge 9 mit ihren Abschnitten 9a, 9b. Der Verlauf und die Anordnung der Trennfugenabschnitte 9a, 9b sowie deren Zuordnung zu jeder Seitenöffnung 12 ist besonders aus Fig. 1 ersichtlich. Danach verläuft der tieferliegende Trennfugenabschnitt 9a in einer Höhenlage im Bereich unterhalb des auslaufseitigen Drehrohrendes 2a, und zwar erstreckt sie sich vom Bereich der dem Drehrohr 2 zugewandten Stirnseiten unterhalb dem Kragenteil 3a horizontal und mündet direkt in das untere Ende der beiden Seitenöffnungen 12. Dagegen verläuft der in der oberen Höhenlage liegende Trennfugenabschnitt 9b etwa auf der Höhe der Standfläche 7a des Ofenauslaufkopfes 3, wobei sie sich horizontal aus dem Bereich der dem Drehrohrende 2a entgegengesetzten Stirnseiten (z.B. 3b) und mündet direkt in das obere Ende der Seitenöffnungen 12. Auf diese Weise ist ein absatzfreies Verschieben des Ofenauslaufkopfes 3 ermöglicht, und es ist vor allem sichergestellt, dass der Ofenauslaufkopf 3 einerseits mit seinem Kragenteil 3a das Drehrohrende 2a vollkommen untergreifen kann, andererseits aber auch mittels der Zylinderrollen 6 auf der zugehörigen Gebäudedecke 7 verschoben werden kann, so dass dadurch bei verhältnismässig grosser Verschiebbarkeit in Richtung des Pfeiles 13 die Fallhöhe des aus dem Drehrohrende 2a auf den Kühlerrost 4a fallenden Brenngutes so klein wie möglich, d.h. in vertretbaren Grenzen, gehalten werden kann.Rather, what is important is the design and the course of the parting line 9 with its sections 9a, 9b. The course and the arrangement of the separating joint sections 9a, 9b and their assignment to each side opening 12 can be seen particularly from FIG. 1. Thereafter, the deeper parting joint section 9a runs at a height in the area below the outlet-side rotary tube end 2a, namely it extends horizontally from the area of the end faces facing the rotary tube 2 below the collar part 3a and opens directly into the lower end of the two side openings 12 in the upper height separating joint section 9b approximately at the level of the standing surface 7a of the furnace outlet head 3, whereby it is horizontal from the area of the end faces opposite the rotary tube end 2a (for example 3b) and opens directly into the upper end of the side openings 12. In this way a shift-free displacement of the furnace outlet head 3 enables, and above all, it is ensured that the furnace outlet head 3, on the one hand, with its collar part 3a, the rotary tube end 2a can reach under completely, but on the other hand can also be moved by means of the cylindrical rollers 6 on the associated building ceiling 7, so that as a result the drop height of the fuel falling from the rotary tube end 2a onto the radiator grate 4a is as small as possible with relatively large displaceability in the direction of arrow 13 possible, ie within reasonable limits.

Es versteht sich von selbst, dass jeder Trennfugenabschnitt 9a bzw. 9b in seiner Höhenlage etwa über den ganzen zugehörigen Umfangsabschnitt verläuft, d.h. bei dem in Fig. 1 veranschaulichten Ausführungsbeispiel mit etwa im Bereich der Längsmitte angeordneten Seitenöffnungen 12 verläuft jeder Trennfugenabschnitt 9a bzw. 9b etwa über den halben Umfang im Bereich der Verbindungsstelle. Die Höhe b der Trennfuge 9 ist so bemessen, dass auch in diesem Bereich durch Temperatureinflüsse verursachte vertikale Dehnungen ausreichend kompensiert werden können. Die Trennfuge 9 ist dabei zweckmässig mittels einer üblichen Keramikfaserdichtung abgedichtet.It goes without saying that each parting line section 9a or 9b runs in its height approximately over the entire associated peripheral section, i.e. In the exemplary embodiment illustrated in FIG. 1 with side openings 12 arranged approximately in the region of the longitudinal center, each parting line section 9a or 9b extends approximately over half the circumference in the region of the connection point. The height b of the parting line 9 is dimensioned such that vertical expansions caused by temperature influences can also be sufficiently compensated for in this area. The parting line 9 is expediently sealed by means of a conventional ceramic fiber seal.

Claims (6)

1. Rotary drum furnace having a cooler, comprising a rotary drum, a stationary kiln outlet head which is associated with the outlet end of the rotary drum so as to form a seal and is capable of limited displacement relative to the outlet end of the rotary drum, and an inlet shaft which connects the kiln outlet head to the cooler, in which a sealable separating gap is provided at the connection point between the kiln outlet head and the inlet shaft, characterised by the following features:
a) the side walls (3c, 3d and 5a, 5b) of the kiln outlet head (3) and the inlet shaft (5) are constructed in the region of the connection point with approximately vertical interengaging steps (10, 11 ) of equal height;
b) in the operating position of the kiln outlet head the pair of steps (10,11) which lie opposite one another are in each case a horizontal distance (a) from each other and form a closable side opening (12), the said distance corresponding approximately to the maximum displacement path of the kiln outlet head;
c) the separating gap (9) is divided by the steps (10, 11 ) into at least two horizontal sections (9a, 9b) which are at different heights and open into the formed side openings (12).
2. Rotary drum furnace according claim 1, characterised in that the side openings (12) formed between the steps (10, 11 ) are lined with removable fireclay bricks (14).
3. Rotary drum furnace according claim 1, characterised in that only one step (10, 11) is provided in each side wall (3c, 3d, 5a, 5b) of the kiln outlet head (3) and the inlet shaft (5) and only one side opening (12) is provided between them.
4. Rotary drum furnace according claim 3, characterised in that the lower-lying section (9a) of the separating gap runs in the region below the outlet end (2a) of the rotary drum and opens into the lower end of the side openings (12), whilst the upper section (9b) of the separating gass runs at approximately the height of the base (7a) of the kiln outlet head and opens into the upper end of the side openings (12).
5. Rotary drum furnace according claim 1, characterised in that the maximum displacement path of the kiln outlet head (3) is adapted in size for free access in the region between the kiln outlet head (3) and the outlet end (2a) of the rotary drum.
6. Rotary drum furnace according claim 1, characterised in that the separating gass (9) is sealed by means of a ceramic fibre seal.
EP84102518A 1983-05-09 1984-03-08 Rotary-drum furnace having a cooler Expired EP0127733B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3316974 1983-05-09
DE19833316974 DE3316974A1 (en) 1983-05-09 1983-05-09 TURNTUBES WITH RADIATOR

Publications (3)

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EP0127733A2 EP0127733A2 (en) 1984-12-12
EP0127733A3 EP0127733A3 (en) 1986-03-19
EP0127733B1 true EP0127733B1 (en) 1987-09-16

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EP84102518A Expired EP0127733B1 (en) 1983-05-09 1984-03-08 Rotary-drum furnace having a cooler

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US (1) US4554876A (en)
EP (1) EP0127733B1 (en)
BR (1) BR8401906A (en)
DE (2) DE3316974A1 (en)
ES (1) ES531677A0 (en)
ZA (1) ZA842153B (en)

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DE3520927A1 (en) * 1985-06-11 1986-12-11 Krupp Polysius Ag, 4720 Beckum Device for heat-treating fine granular material
US4768445A (en) * 1986-10-17 1988-09-06 Man Gutehoffnungshutte Gmbh Waste incinerator construction
US5164158A (en) * 1990-12-14 1992-11-17 Thermotech Systems Corporation Methods for remediating contaminated soils
DE4343464A1 (en) * 1993-12-20 1995-06-22 Kloeckner Humboldt Deutz Ag Refractory seal for gap between two constructional parts
US5535685A (en) * 1994-12-28 1996-07-16 Dae Hwan Co., Ltd. Incinerator utilizing dry distillation
US6419481B2 (en) * 2000-04-06 2002-07-16 Andritz Oy Cooler for rotary kilns
US6474985B1 (en) 2002-04-17 2002-11-05 Metso Minerals Industries, Inc. Toothed grate for rotary kiln peripheral discharge openings

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DD73614A (en) *
FR842333A (en) * 1937-12-01 1939-06-09 Fuller Co Method and apparatus for cooling clinker
US2431799A (en) * 1945-11-08 1947-12-02 Fuller Co Cooler having overlapping replaceable grates
US2461754A (en) * 1946-10-29 1949-02-15 Traylor Engineering & Mfg Comp Sealing ring for rotary kilns
US2611330A (en) * 1947-06-19 1952-09-23 United States Steel Corp Method of repairing furnace walls
US2960943A (en) * 1959-05-12 1960-11-22 Smidth & Co As F L Incinerator with water cooled ignition chamber
DE1433342A1 (en) * 1964-07-16 1968-11-14 Metallgesellschaft Ag Device for the separation of discharge mixtures from rotary tube furnaces
US3350077A (en) * 1965-08-05 1967-10-31 Smidth & Co As F L Rotary kiln installations
US3358977A (en) * 1965-08-05 1967-12-19 Smidth & Co As F L Rotary kiln installations
US3539164A (en) * 1967-04-22 1970-11-10 Kloeckner Humboldt Deutz Ag Cooler for hot lump goods,particularly cement clinker
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GB1286925A (en) * 1971-04-19 1972-08-31 Smidth & Co As F L Method of assembling a junction piece to a planetary cooler tube on a rotary kiln
SU616504A1 (en) * 1976-03-05 1978-07-25 Иркутский филиал Всесоюзного научно-исследовательского и проектного института алюминиевой, магниевой и электродной промышленности Rotary furnace seal
SU577378A1 (en) * 1976-03-09 1977-10-25 Государственный Ордена Трудового Красного Знамени Всесоюзный Проектный И Научно-Исследовательский Институт Цементной Промышленности Device for sealing gap between rotary furnace and stationary chamber
US4083678A (en) * 1976-11-05 1978-04-11 Tennessee River Pulp & Paper Company Rotary kiln
JPS54107471A (en) * 1978-02-10 1979-08-23 Kawasaki Heavy Ind Ltd Rotary drum

Also Published As

Publication number Publication date
ES8502248A1 (en) 1984-12-16
EP0127733A2 (en) 1984-12-12
BR8401906A (en) 1984-12-11
DE3466277D1 (en) 1987-10-22
DE3316974A1 (en) 1984-11-15
ES531677A0 (en) 1984-12-16
US4554876A (en) 1985-11-26
ZA842153B (en) 1984-11-28
EP0127733A3 (en) 1986-03-19

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