EP1580509B1 - Discharge end of a rotary drum furnace - Google Patents

Discharge end of a rotary drum furnace Download PDF

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Publication number
EP1580509B1
EP1580509B1 EP05006212A EP05006212A EP1580509B1 EP 1580509 B1 EP1580509 B1 EP 1580509B1 EP 05006212 A EP05006212 A EP 05006212A EP 05006212 A EP05006212 A EP 05006212A EP 1580509 B1 EP1580509 B1 EP 1580509B1
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EP
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Prior art keywords
hollow
rotary
radially
cooling
discharge
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German (de)
French (fr)
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EP1580509A1 (en
Inventor
Edgar Stöcker
Karl Schinke
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KHD Humboldt Wedag AG
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KHD Humboldt Wedag AG
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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
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/224—Discharge ends
    • 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 the Gutaus strictde a rotary kiln for the thermal treatment of flour-like materials such as cement raw meal for the production of cement clinker, with a rotary kiln casing at the outlet end outside by far concentrically surrounding outer tube, the front end of the double sheath is closed by distributed around the circumference heat-resistant leakage protection segments, each consisting of one-piece hollow angle bodies with axial hollow legs and radially inwardly directed hollow lugs, which latter support the refractory rotary kiln lining, wherein the cavities of both the axial leg and the inwardly directed lugs of cooling air can be flowed through.
  • the outlet end of a rotary kiln in particular for the production of cement clinker from cement raw meal is subject to high stresses, namely mechanical stresses due to surface wear due to overflowing over the outlet edge good as cement clinker, by passing solid components of the gas stream and by deformations of the rotary kiln shell, and high thermochemical stresses by contact with the hot good and with the flowing from the clinker cooler in the outlet end of the rotary kiln hot secondary air, by the radiation of the hot burner flame of the rotary kiln and by contact with the solid and gaseous components contained in the gas stream. From the design and equipment of the outlet of the rotary kiln crucially depends on its durability and thus the availability of the entire cement clinker production line.
  • the cooled from the inside stone retaining lugs of the leakage protection segments are exposed to a high risk of overheating, which is given by overheated stone holding the risk of deformation of the entire rotary kiln outlet end.
  • the fixings of the leakage protection segments lie precisely in the area of the stone retaining lugs and within the same, so that their cooling and fastening taking place from inside is endangered.
  • the invention has for its object to make the Gutaus Releasede in a rotary kiln, in particular for the production of cement clinker so that the life of the rotary kiln and the increasing stresses such.
  • the radially inwardly directed hollow stone retaining lugs of the leakage protection segments according to the invention are angled inwards at an angle of 90 °, that is to say with a rectangular stone contact surface, standard bricks can be used for the refractory lining of the rotary kiln.
  • the risk of deformation of the highly stressed rotary kiln outlet end is minimized.
  • the wall thicknesses of the formed as a heat-resistant cast body angular hollow leakage protection segments are evenly distributed over the entire cast body. Thus, a uniform temperature distribution is achieved in all distributed around the circumference of internally cooled leakage protection segments and thermal stresses are avoided.
  • the rotary kiln leakage protection segments according to the invention are cooled by targeted cooling air flow.
  • the radially inner regions of the axial hollow legs asde povertyzströmströmungskanäle, the radially inwardly directed hollow stone holding lases asde povertyumlenk Schemee and the radially outer regions of the axial hollow legs asde povertyabströmungskanäle are cooled by targeted cooling air flow.
  • the leakage protection segments 13 each consist of one-piece hollow angle bodies whose axial hollow through-flow of cooling air leg 15 are plugged into the likewise formed as a hollow body support arms 14 and are secured there by radial bolts 16. At 17, the view is displayed on a screw head.
  • the one-piece leakage protection segments 13 have radially inwardly directed lugs 18 (stone retaining lugs), which are also hollow and can be flowed through by cooling air.
  • the radially inner portions of the axial hollow legs 15 are formed as cooling air inflow channels, the radially inwardly directed hollow lugs 18 as cooling air deflection portions and the radially outer portions of the axial hollow legs 15 asde povertyabströmungskanäle through which the cooling air at 22 exits.
  • the radially outer walls of the formed as a hollow body and also flowed through by cooling air support arms 14 may each form the partition wall between thede povertyzuströmungskanal and thedeluftabströmungskanal.
  • the radially outer walls of the hollow support arms 14 may each have a radially inwardly located within the hollow stone retaining nose 18 Luftleitnase 23.
  • hollow stone holding lugs 18 are angled away at right angles from their hollow axial legs 15, refractory standard stones can also be securely supported with the lugs of the leakage protection segments according to the invention. With 26 and 27 stone retaining rings are still displayed, which are attached to the inner wall of the rotary kiln pipe 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Drying Of Solid Materials (AREA)
  • Passenger Equipment (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

The heat-resistant protective segments (13) are formed by hollow single-piece angled bodies with hollow axial arms (15) which are mounted on support arms (14) protruding from the trailing edge of the discharge end. Cooling air (21) can flow through the arms and also through hollow noses (18) protruding inwards in the radial direction from the segment bodies. An outer tube (12) extends concentrically to and at a distance from the furnace mantle tube (10) to form a double mantle which is enclosed by heat-resistant protective segments. The noses protruding from the inner sides of the segments support the fireproof cladding. Cooling air is blown into the space inside the double mantle.

Description

Die Erfindung betrifft das Gutauslaufende eines Drehrohrofens zur thermischen Behandlung von mehlförmigen Materialien wie Zementrohmehl zur Herstellung von Zementklinker, mit einem das Drehrohrofen-Mantelrohr am Auslaufende außen mit Abstand konzentrisch umgebenden Außenrohr, wobei das Stirnende des Doppelmantels durch um den Umfang verteilte hitzebeständige Auslaufschutzsegmente verschlossen ist, die aus jeweils einteiligen hohlen Winkelkörpern bestehen mit axialen hohlen Schenkeln und radial nach innen gerichteten hohlen Nasen, welch letztere die feuerfeste Drehofenauskleidung abstützen, wobei die Hohlräume sowohl der axialen Schenkel als auch der nach innen gerichteten Nasen von Kühlluft durchströmbar sind.The invention relates to the Gutauslaufende a rotary kiln for the thermal treatment of flour-like materials such as cement raw meal for the production of cement clinker, with a rotary kiln casing at the outlet end outside by far concentrically surrounding outer tube, the front end of the double sheath is closed by distributed around the circumference heat-resistant leakage protection segments, each consisting of one-piece hollow angle bodies with axial hollow legs and radially inwardly directed hollow lugs, which latter support the refractory rotary kiln lining, wherein the cavities of both the axial leg and the inwardly directed lugs of cooling air can be flowed through.

Das Auslaufende eines Drehrohrofens insbesondere zur Herstellung von Zementklinker aus Zementrohmehl unterliegt hohen Beanspruchungen, nämlich mechanischen Beanspruchungen durch Oberflächenverschleiß infolge des über die Auslaufkante überlaufenden Gutes wie Zementklinker, durch vorbeiströmende feste Bestandteile des Gasstromes sowie durch Verformungen des Drehrohrofenmantels, und hohen thermochemischen Beanspruchungen durch Kontakt mit dem heißen Gut und mit der aus dem Klinkerkühler in das Auslaufende des Drehofens einströmenden heißen Sekundärluft, durch die Strahlung der heißen Brennerflamme des Drehofens sowie durch Kontakt mit den im Gasstrom enthaltenen festen und gasförmigen Bestandteilen. Von der Gestaltung und Ausrüstung des Auslaufendes des Drehrohrofens hängt entscheidend dessen Haltbarkeit und somit die Verfügbarkeit der gesamten Zementklinkerproduktionslinie ab.The outlet end of a rotary kiln in particular for the production of cement clinker from cement raw meal is subject to high stresses, namely mechanical stresses due to surface wear due to overflowing over the outlet edge good as cement clinker, by passing solid components of the gas stream and by deformations of the rotary kiln shell, and high thermochemical stresses by contact with the hot good and with the flowing from the clinker cooler in the outlet end of the rotary kiln hot secondary air, by the radiation of the hot burner flame of the rotary kiln and by contact with the solid and gaseous components contained in the gas stream. From the design and equipment of the outlet of the rotary kiln crucially depends on its durability and thus the availability of the entire cement clinker production line.

Es hat sich in der Praxis bewährt, das Auslaufende des Drehrohrofens in Form eines Doppelmantels auszubilden, dessen Stirnende durch hitzebeständige Auslaufschutzsegmente abgeschlossen ist, die auf von der Drehofenauslaufkante auskragenden Tragarmen befestigt sind und die mit ihren radial nach innen gerichteten Nasen die feuerfeste Drehofenauskleidung abstützen können. Dabei kann in den Hohlraum des Doppelmantels Kühlluft eingeblasen werden ( DE-A-21 60 300 , DE-A 23 29 061 und EP-B-0 636 847 ).It has been proven in practice to form the outlet end of the rotary kiln in the form of a double jacket, the front end is completed by heat-resistant spill protection segments, which are mounted on projecting from the rotary kiln outlet support arms and can support the refractory rotary kiln with their radially inwardly directed lugs. In this case, cooling air can be injected into the cavity of the double jacket ( DE-A-21 60 300 . DE-A 23 29 061 and EP-B-0 636 847 ).

Ganz besonders beansprucht sind bei den bekannten Auslaufschutzsegmenten die radial nach innen gerichteten Nasen, weil diese abgesehen von der Temperaturbelastung durch glühend heißen Zementklinker und z. B. 1100 °C heiße Sekundärluftströmung die Schubkräfte der feuerfesten Drehofenauskleidung, insbesondere der feuerfesten Steine aufnehmen müssen, weshalb diese Nasen in der Fachwelt Steinhaltenasen genannt werden. Die Kühlung der bekannten Auslaufschutzsegmente ist nicht gezielt, insbesondere deren Steinhaltenasen sind vergleichsweise dickwandig und nicht gekühlt, so dass die Gefahr der Überhitzung speziell der Steinhaltenasen und damit Verformung des gesamten Drehofenauslaufendes nicht ausgeschlossen ist.Particularly stressed are the radially inwardly directed lugs in the known leakage protection segments, because these apart from the temperature stress by glowing hot cement clinker and z. B. 1100 ° C hot secondary air flow must absorb the shear forces of the refractory rotary kiln lining, in particular the refractory bricks, which is why these noses are called in the art stone retaining lances. The cooling of the known leakage protection segments is not targeted, in particular their stone retaining lances are comparatively thick-walled and not cooled, so that the risk of overheating especially the Steinhaltenasen and thus deformation of the entire rotary kiln outlet end is not excluded.

Bei den bekannten Drehrohrofen-Auslaufenden der DE 22 35 560 A und DE 22 29 951 A sind die aus Guss bestehenden sich zu einem Ring ergänzenden Auslaufschutzsegmente nicht auf von der Drehofenauslaufkante auskragenden Tragarmen befestigt. Vielmehr ist bei diesen Drehrohrofen-Auslaufenden am Ofenrohrauslaufende ein nach innen gerichteter Flanschring angeschweißt, der vom etwa senkrechten Schenkel der Auslaufschutzsegmente übergriffen und hintergriffen wird. Dabei sind die Auslaufschutzsegmente, ein Luftleitblech, der Flanschring und die Schutzsegment-Schenkel mit zueinander fluchtenden Durchgangsöffnungen versehen, durch die etwa waagerecht liegende Steckbolzen durchgesteckt sind, welche die Auslaufschutzsegmente gegen Herausfallen aus dem rotierenden Drehrohr schützen. Die von innen gekühlten Steinhaltenasen der Auslaufschutzsegmente sind einer hohen Gefahr der Überhitzung ausgesetzt, wobei durch überhitzte Steinhaltenasen die Gefahr von Verformungen des gesamten Drehofenauslaufendes gegeben ist. Bei den bekannten Drehofen-Auslaufenden liegen die Befestigungen der Auslaufschutzsegmente gerade im Bereich der Steinhaltenasen und innerhalb derselben, so dass deren von innen erfolgende Kühlung und Befestigung gefährdet ist.In the known rotary kiln outlet ends of DE 22 35 560 A and DE 22 29 951 A the outflow protection segments which consist of cast iron and which complement one another are not fastened to support arms projecting from the rotary kiln outlet edge. Rather, in these rotary kiln outlet ends at the furnace tube outlet end an inwardly directed flange ring is welded, which overlapped and engaged from the approximately vertical leg of the outlet protection segments becomes. Here are the spill protection segments, an air baffle, the flange and the protective segment legs are provided with mutually aligned through holes through which approximately horizontally located locking pins are inserted, which protect the leakage protection segments against falling out of the rotating rotary tube. The cooled from the inside stone retaining lugs of the leakage protection segments are exposed to a high risk of overheating, which is given by overheated stone holding the risk of deformation of the entire rotary kiln outlet end. In the known rotary kiln outlet ends, the fixings of the leakage protection segments lie precisely in the area of the stone retaining lugs and within the same, so that their cooling and fastening taking place from inside is endangered.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Drehrohrofen insbesondere zur Herstellung von Zementklinker das Gutauslaufende so zu gestalten, dass die Standzeit des Drehrohrofens auch den steigenden Beanspruchungen wie z. B. steigenden Temperaturen der aus dem Klinkerkühler zuströmenden Sekundärluft gerecht wird.The invention has for its object to make the Gutauslaufende in a rotary kiln, in particular for the production of cement clinker so that the life of the rotary kiln and the increasing stresses such. B. increasing temperatures of the incoming from the clinker cooler secondary air is fair.

Diese Aufgabe wird gemäß der Erfindung mit einem Drehofenauslaufende mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved according to the invention with a rotary kiln outlet end having the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

Beim erfindungsgemäßen Drehofenauslaufende bestehen die dort angebrachten Auslaufschutzsegmente aus jeweils einteiligen hohlen Winkelkörpern, deren axiale hohle von Kühlluft durchströmbare Schenkel auf die vom Drehofenmantelrohr auskragenden Tragarme gesteckt sind und deren radial nach innen gerichtete Nasen ebenfalls hohl und von Kühlluft durchströmbar sind. Erfindungsgemäß gelingt es also, besonders Steinhaltenasen, die sehr hohen Temperaturen sowie hohen Schubkräften der feuerfesten Steine der Auskleidung des mit Gefälle installierten Drehrohrofens ausgesetzt sind, durch gezielte Kühlluftführung von innen wirkungsvoll zu kühlen, so dass auch die Steinhaltenasen eine ausreichend lange Standzeit erhalten. Sind die radial nach innen gerichteten hohlen Steinhaltenasen der erfindungsgemäßen Auslaufschutzsegmente mit einem Winkel von 90°, also mit rechtwinkeliger Steinanlagefläche nach innen abgewinkelt, so können zur Feuerfestauskleidung des Drehrohrofens Standard-Steine verwendet werden. Bei Einsatz der erfindungsgemäßen gezielt kühlbaren Auslaufschutzsegmente ist die Gefahr einer Deformation des hoch beanspruchten Drehofen-Auslaufendes minimiert.When Drehofenauslaufende invention mounted there leakage protection segments consist of each one-piece hollow angle bodies, the axial hollow of cooling air flow through legs are plugged onto the projecting from Drehofenmantelrohr support arms and their radially inwardly directed lugs are also hollow and can be flowed through by cooling air. According to the invention, it is thus possible, especially stone holding lances, which are exposed to very high temperatures and high shear forces of the refractory bricks of the lining of the rotary kiln installed with slope, to effectively cool by targeted cooling air flow from the inside, so that the stone holding wells get a sufficiently long life. If the radially inwardly directed hollow stone retaining lugs of the leakage protection segments according to the invention are angled inwards at an angle of 90 °, that is to say with a rectangular stone contact surface, standard bricks can be used for the refractory lining of the rotary kiln. When using the specifically coolable leakage protection segments according to the invention, the risk of deformation of the highly stressed rotary kiln outlet end is minimized.

Nach einem weiteren Merkmal der Erfindung sind die Wandstärken der als hitzebeständige Gusskörper ausgebildeten winkelförmigen hohlen Auslaufschutzsegmente über den gesamten Gusskörper gleichmäßig verteilt. Damit wird eine gleichmäßige Temperaturverteilung in sämtlichen um den Umfang verteilten von innen gekühlten Auslaufschutzsegmenten erreicht und Wärmespannungen werden vermieden.According to a further feature of the invention, the wall thicknesses of the formed as a heat-resistant cast body angular hollow leakage protection segments are evenly distributed over the entire cast body. Thus, a uniform temperature distribution is achieved in all distributed around the circumference of internally cooled leakage protection segments and thermal stresses are avoided.

Die erfindungsgemäßen Drehrohrofen-Auslaufschutzsegmente sind durch gezielte Kühlluftführung gekühlt. Dazu sind nach einem weiteren Merkmal der Erfindung bei den Auslaufschutzsegmenten die radial inneren Bereiche der axialen hohlen Schenkel als Kühlluftzuströmungskanäle, die radial nach innen gerichteten hohlen Steinhaltenasen als Kühlluftumlenkbereiche und die radial außen liegenden Bereiche der axialen hohlen Schenkel als Kühlluftabströmungskanäle ausgebildet.The rotary kiln leakage protection segments according to the invention are cooled by targeted cooling air flow. For this purpose, according to a further feature of the invention in the leakage protection segments, the radially inner regions of the axial hollow legs as Kühlluftzströmströmungskanäle, the radially inwardly directed hollow stone holding lases as Kühlluftumlenkbereiche and the radially outer regions of the axial hollow legs as Kühlluftabströmungskanäle.

Die Erfindung und deren weitere Merkmale und Vorteile werden anhand des in den Figuren schematisch dargestellten Ausführungsbeispieles näher erläutert.The invention and its further features and advantages will be explained in more detail with reference to the embodiment shown schematically in the figures.

Es zeigt:

Fig. 1:
einen Teillängsschnitt durch das erfindungsgemäß gestaltete Auslaufende eines Drehrohrofens mit um den Umfang verteilten Auslaufschutzsegmenten, und
Fig. 2:
perspektivisch herausgezeichnet die Ansicht auf einen Umfangsausschnitt des Drehofenauslaufendes der Fig. 1.
It shows:
Fig. 1:
a partial longitudinal section through the inventively designed outlet end of a rotary kiln with distributed around the circumference leakage protection segments, and
Fig. 2:
in perspective, the view is drawn on a peripheral section of the rotary kiln outlet end of FIG. 1.

Beim Drehrohrofen der Fig. 1 zur Herstellung von Zementklinker aus calciniertem Rohmehl ist das Drehrohrofen-Mantelrohr 10 am Gutauslaufende (linkes Ende) außen mit Abstand über um den Umfang verteilte radiale Abstandshalter 11 konzentrisch von einem Außenrohr 12 umgeben, wobei das Stirnende des Doppelmantels durch um den Umfang verteilte Auslaufschutzsegmente 13 verschlossen ist, die aus hitzebeständigem Guss bestehen. Am Drehrohrofen-Mantelrohr 10 sind außen um den Umfang verteilte Tragarme 14 befestigt, die von der Drehofenauslaufkante auskragen. Die Auslaufschutzsegmente 13 bestehen jeweils aus einteiligen hohlen Winkelkörpern, deren axiale hohle von Kühlluft durchströmbare Schenkel 15 auf die ebenfalls als Hohlkörper ausgebildeten Tragarme 14 gesteckt sind und dort durch radiale Schraubenbolzen 16 gesichert sind. Mit 17 ist die Ansicht auf einen Schraubenkopf angezeigt. Die einteiligen Auslaufschutzsegmente 13 weisen radial nach innen gerichtete Nasen 18 (Steinhaltenasen) auf, die ebenfalls hohl und von Kühlluft durchströmbar sind.When rotary kiln of Fig. 1 for the production of cement clinker from calcined raw meal, the rotary kiln casing pipe 10 at the Gutauslaufende (left end) outside at a distance over distributed around the circumference radial spacer 11 concentrically surrounded by an outer tube 12, wherein the front end of the double sheath by the circumference distributed leakage protection segments 13 is closed, which consist of heat-resistant cast iron. On the rotary kiln casing pipe 10 are distributed around the circumference distributed support arms 14 which protrude from the rotary kiln outlet edge. The leakage protection segments 13 each consist of one-piece hollow angle bodies whose axial hollow through-flow of cooling air leg 15 are plugged into the likewise formed as a hollow body support arms 14 and are secured there by radial bolts 16. At 17, the view is displayed on a screw head. The one-piece leakage protection segments 13 have radially inwardly directed lugs 18 (stone retaining lugs), which are also hollow and can be flowed through by cooling air.

Wie auch aus Fig. 2 hervorgeht, ist außen um das DrehofenMantelrohr 10 herum eine feststehende Kühlluft-Ringleitung 19 angeordnet, von der um den Umfang verteilte Kühlluftdüsen 20 abgehen, über deren Ausmündung Kühlluft 21 in den Hohlraum des Doppelmantels am Drehofenauslaufende eingeblasen wird. Die gezielte Führung der Kühlluft sowie gezielte Kühlung der Auslaufschutzsegmente 13 und insbesondere gezielte Kühlung der Steinhaltenasen 18 ist wie folgt:As is apparent from Fig. 2, outside the rotary kiln casing pipe 10 around a fixed cooling air loop 19 is arranged, depart from the circumferentially distributed cooling air nozzles 20, through the mouth of cooling air 21 is blown into the cavity of the double shell at Drehofenauslaufende. The targeted guidance of the cooling air and targeted cooling of the leakage protection segments 13 and in particular targeted cooling of the stone retaining lugs 18 is as follows:

Bei den Auslaufschutzsegmenten 13 sind die radial inneren Bereiche der axialen hohlen Schenkel 15 als Kühlluftzuströmungskanäle, die radial nach innen gerichteten hohlen Nasen 18 als Kühlluftumlenkbereiche und die radial außen liegenden Bereiche der axialen hohlen Schenkel 15 als Kühlluftabströmungskanäle ausgebildet, durch welche die Kühlluft bei 22 austritt. Dabei können die radial außen liegenden Wandungen der als Hohlkörper ausgebildeten und ebenfalls von Kühlluft durchströmten Tragarme 14 jeweils die Trennwand zwischen dem Kühlluftzuströmungskanal und dem Kühlluftabströmungskanal bilden. Zur noch gezielteren Kühlluftführung können die radial außen liegenden Wandungen der hohlen Tragarme 14 jeweils eine radial nach innen innerhalb der hohlen Steinhaltenase 18 liegende Luftleitnase 23 aufweisen. An die radial außen liegenden Wandungen der hohlen Tragarme 14 schließen an deren den Auslaufschutzsegmenten 13 abgewandten Ende um den Umfang verteilte Leitbleche 24 an, die den aus Drehofenmantelrohr 10 und Außenrohr 12 gebildeten Ringraum in den radial innen liegenden Kühlluftzuströmungskanal 21 und den radial außen liegenden Kühlluftabströmungskanal 22 unterteilen. Mit 25 sind Halterungen für die Luftleitbleche 24 angezeigt, die über die Halterungen am Außenrohr 12 befestigt sind.In the leakage protection segments 13, the radially inner portions of the axial hollow legs 15 are formed as cooling air inflow channels, the radially inwardly directed hollow lugs 18 as cooling air deflection portions and the radially outer portions of the axial hollow legs 15 as Kühlluftabströmungskanäle through which the cooling air at 22 exits. In this case, the radially outer walls of the formed as a hollow body and also flowed through by cooling air support arms 14 may each form the partition wall between the Kühlluftzuströmungskanal and the Kühlluftabströmungskanal. For even more targeted cooling air guide the radially outer walls of the hollow support arms 14 may each have a radially inwardly located within the hollow stone retaining nose 18 Luftleitnase 23. At the radially outer walls of the hollow support arms 14 close to the end of the outlet protection segments 13 facing away from the circumference distributed baffles 24, which formed from the rotary kiln casing tube 10 and outer tube 12 Divide annular space in the radially inner Kühlluftzuströmungskanal 21 and the radially outer Kühlluftabströmungskanal 22. With 25 brackets for the air baffles 24 are displayed, which are attached via the brackets on the outer tube 12.

Sind die hohlen Steinhaltenasen 18 rechtwinklig von ihren hohlen axialen Schenkeln 15 abgewinkelt, können mit den Nasen der erfindungsgemäßen Auslaufschutzsegmente auch feuerfeste Standardsteine sicher abgestützt werden. Mit 26 und 27 sind noch Steinhalteringe angezeigt, die an der Innenwandung des Drehofenmantelrohres 10 befestigt sind.If the hollow stone holding lugs 18 are angled away at right angles from their hollow axial legs 15, refractory standard stones can also be securely supported with the lugs of the leakage protection segments according to the invention. With 26 and 27 stone retaining rings are still displayed, which are attached to the inner wall of the rotary kiln pipe 10.

Claims (4)

  1. Discharge end of a rotary kiln for the thermal treatment of mealy materials like raw cement meal for the production of cement clinker, comprising an outer tube (12) concentrically surrounding the rotary-kiln casing tube (10) at the discharge end on the outside at a distance apart, the front end of the double shell being closed by heat-resistant discharge protective segments (13) which are distributed around the circumference and which each consist of one-piece hollow angle bodies having axial hollow legs (15) and radially inwardly directed hollow lugs (18), the latter supporting the refractory rotary-kiln lining, it being possible for cooling air to flow through the cavities of both the axial legs (15) and the inwardly directed lugs (18),
    characterized by the following features:
    a) supporting arms (14) distributed around the circumference are fastened on the outside to the rotary-kiln casing tube (10), said supporting arms (14) projecting from the rotary-kiln discharge edge;
    b) the supporting arms (14) are designed as hollow bodies, onto which the axial hollow legs (15) of the angular hollow discharge protective segments (13) are put;
    c) the radially outer wall of the supporting arms (14) designed as hollow bodies forms in each case the partition between a radially inner cooling-air inflow passage (21) and a radially outer cooling-air outflow passage (22);
    d) the radially inwardly directed hollow lugs (18) of the discharge protective segments (13) are designed as cooling-air deflection regions between the radially inner cooling-air inflow passage and the radially outer cooling-air outflow passage (22).
  2. Rotary-furnace discharge end according to Claim 1, characterized in that the radially outer walls of the hollow supporting arms (14) each have an air-guide lug (23) lying radially on the inside within the discharge-protective-segment lug (18).
  3. Rotary-furnace discharge end according to Claim 1, characterized in that baffles (24) distributed around the circumference adjoin the radially outer walls of the hollow supporting arms (14) at their end remote from the discharge protective segments (13), which baffles (24) subdivide the annular space formed from rotary-furnace shell tube (10) and outer tube (12) into the radially inner cooling-air inflow passage (21) and the radially outer cooling-air outflow passage (22).
  4. Rotary-furnace discharge end according to Claim 1, characterized in that the wall thicknesses of the angular hollow discharge protective segments (13) designed as a cast body are distributed uniformly over the entire cast body.
EP05006212A 2004-03-26 2005-03-22 Discharge end of a rotary drum furnace Active EP1580509B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004014872 2004-03-26
DE102004014872A DE102004014872A1 (en) 2004-03-26 2004-03-26 Outlet end of a rotary kiln

Publications (2)

Publication Number Publication Date
EP1580509A1 EP1580509A1 (en) 2005-09-28
EP1580509B1 true EP1580509B1 (en) 2007-08-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05006212A Active EP1580509B1 (en) 2004-03-26 2005-03-22 Discharge end of a rotary drum furnace

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EP (1) EP1580509B1 (en)
AT (1) ATE370377T1 (en)
DE (2) DE102004014872A1 (en)
DK (1) DK1580509T3 (en)
ES (1) ES2290804T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936652A (en) * 2010-09-05 2011-01-05 江苏金能环境科技有限公司 Heat side kilneye protective cover for rotary kiln
CA2858156C (en) * 2011-12-23 2018-12-04 Fives Fcb Device for cooling the opening of a rotary kiln by means of cool air-blowing
CN104329938B (en) * 2014-10-31 2016-09-28 章丘华明水泥有限公司 Rotary kiln air cooling equipment
DE102018220727A1 (en) * 2018-11-30 2020-06-04 Thyssenkrupp Ag Oven with a protective segment at the oven outlet

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE561297C (en) * 1930-03-15 1932-10-12 Fried Krupp Grusonwerk Akt Ges Cooling device for the discharge end of rotary tube furnaces
DE938839C (en) * 1953-05-08 1956-02-09 Miag Vertriebs Gmbh Cooled outlet for rotary furnaces
DE1558056B2 (en) * 1967-02-21 1972-12-28 Klöckner-Humboldt-Deutz AG, 5000 Köln FASTENING DEVICE FOR SPILL PROTECTION SEGMENTS ON THE AIR-COOLED SPILL RING FOR TUBE FURNACES, IN PARTICULAR FOR CEMENT PRODUCTION
DE2160300C3 (en) * 1971-12-04 1975-05-07 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Spacers between the jackets of a double-walled pipe or container exposed to temperature differences
DE2229951C2 (en) * 1972-06-20 1974-02-14 Karl Steffens Gmbh, 4032 Lintorf Method and device for cooling discharge rings consisting of metal segments on rotary kilns, in particular for cement production
DE2235560C3 (en) * 1972-07-20 1979-03-29 Karl Steffens Gmbh, 4032 Lintorf Device for cooling the outlet ring of a rotary kiln consisting of metal segments
DE2329061A1 (en) * 1973-06-07 1975-01-02 Kloeckner Humboldt Deutz Ag Rotary kiln discharge ring is segmental - each segment divided into robust inner part and outer part
FR2410802A1 (en) * 1977-12-05 1979-06-29 Fives Cail Babcock Protection for opening of rotating oven - uses multipart ring fixed to oven end air cooled hollow supports and concentric ring
FR2618215B1 (en) * 1987-07-17 1990-03-30 Fives Cail Babcock DEVICE FOR PROTECTING THE MOUTH OF A ROTARY OVEN.
DE4325303A1 (en) * 1993-07-28 1995-02-02 Kloeckner Humboldt Deutz Ag Rotary tube furnace for the heat treatment of flowable materials

Also Published As

Publication number Publication date
ES2290804T3 (en) 2008-02-16
DK1580509T3 (en) 2007-12-03
DE502005001207D1 (en) 2007-09-27
ATE370377T1 (en) 2007-09-15
DE102004014872A1 (en) 2005-10-13
EP1580509A1 (en) 2005-09-28

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