EP0205651B1 - Process and device to remove deposits and linings from reposing drums, in particular those in rotative drum furnaces - Google Patents

Process and device to remove deposits and linings from reposing drums, in particular those in rotative drum furnaces Download PDF

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Publication number
EP0205651B1
EP0205651B1 EP85111353A EP85111353A EP0205651B1 EP 0205651 B1 EP0205651 B1 EP 0205651B1 EP 85111353 A EP85111353 A EP 85111353A EP 85111353 A EP85111353 A EP 85111353A EP 0205651 B1 EP0205651 B1 EP 0205651B1
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EP
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Prior art keywords
roller
teeth
cylindrical tube
clearing
means according
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EP85111353A
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German (de)
French (fr)
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EP0205651A1 (en
Inventor
Herbert Dipl.-Ing. Schweder
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Spezialbaukombinat Magdeburg VEB
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Spezialbaukombinat Magdeburg VEB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
    • F27D25/001—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag comprising breaking tools, e.g. hammers, drills, scrapers
    • 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
    • F27B7/2075—Removing incrustations

Definitions

  • the invention relates to a method for complete or partial processing or breaking out of the approach and / or masonry from a tubular cylinder, in particular a rotary kiln of the cement industry, of the type specified in the introduction to claim 1.
  • the invention relates to a device for performing the method according to the preamble of patent claim 3.
  • a mechanical breakout or cleaning device is known from DD-PS 64 844, which is operated with ultrasonic vibrations.
  • US-A-3 025 548 discloses a device for removing solid attachments from a rotary kiln by means of a cutting head which is fastened to the free end of a dimensionally stable rod and is introduced into the rotary kiln from one end by its longitudinal movement. The outcrops or the masonry are broken out by the cut-out teeth provided on the cutting head with simultaneous rotation of the rotary tube.
  • the object of the invention is to provide a method for completely or partially breaking out the lugs and / or the masonry from horizontal Rahr cylinders rotating around their longitudinal axis, in particular from rotary kilns, which allows continuous, continuous or partial breaking out without cooling the pipe cylinder with controllable breakout depth , Excavation length and speed of advance enabled.
  • the device for carrying out the method should be of simple construction and should also be able to be used in the elongated and large-volume rotary kilns of the cement industry.
  • the lugs and / or the masonry are broken out of the tubular cylinder by impact, impact or tearing which are exerted by the teeth of the breakout roller on the inner surface of the tubular cylinder. Due to the rotation of the tubular cylinder, the break-out roller resting on its base area executes a rolling movement, the longitudinal movement generated by its inclination with respect to the longitudinal axis of the tubular cylinder causing the break-out roller to pass through the entire length of the tubular cylinder automatically, against the inclination of the tubular cylinder.
  • the throughput speed of the break-out roller is delayed, stopped or reversed in its direction by a cable pull.
  • a device which is particularly suitable for carrying out the method according to the invention is specified in patent claim 3.
  • the radially protruding stabilizing disc results in the inclined position of the break-out roller resting in the base region of the tubular cylinder, which causes the longitudinal movement of the break-out roller when the tubular cylinder rotates and unrolls.
  • the angular toothed disk with the breakout teeth causes an abrupt or impact-like engagement of the teeth in the extension or the masonry of the tubular cylinder when the breakout roller rolls.
  • the breakout roller is expediently conical, the toothed disk having several pairs of teeth of the same size.
  • the tooth tips of four identical break-out teeth and four rolling teeth each form a square for themselves, the two squares formed from the tooth tips being offset from one another in such a way that an uneven octagon is formed.
  • the majority of the wedge-shaped breakout teeth can be aligned with the cutting width at right angles to the longitudinal axis of the breakout roller. The sudden action of the cut-out teeth on the approaches or the masonry is intensified if these are arranged on the toothed disk in such a way that they strike the inner wall of the tubular cylinder perpendicularly.
  • a particularly expedient embodiment of the device according to the invention is characterized in that the size and the radial adjustment area of the stabilizing disk is adapted approximately to the diameter of the enveloping figure of the break-out roller and has radial adjustment elements arranged uniformly distributed on its circumference. These adjustment elements can have contact elements at their outer end.
  • the distance between the stabilizing disc and the toothed disc should advantageously be larger and not equal to the longitudinal dimension of a brick of the furnace lining.
  • the breakout roller can be compact, structured or hollow as well as variable in its mass, size, type and number of breakout tools, in the material and in the selected cross section.
  • the breakout roller has a conical or conical envelope figure during its rolling movement, which is the reason for its longitudinal movement against the inclination of the tubular cylinder.
  • This longitudinal movement of the break-out roller can be controlled by the cable pull connected to its rear end.
  • the process-related longitudinal inclination of the rotary kiln is also overcome.
  • the longitudinal movement can be slowed down, slowed down or reversed with the cable pull. This allows the breakout roller to travel the entire inner surface of the tubular cylinder using the furnace drive.
  • the cross-sectional shape of the roller influences the working effect and the movement behavior.
  • An advantageous angular roller cross section creates rhythmic impacts when turning, which significantly increases the force.
  • a roller with an angular cross-section can move out of the lower trough position in the tubular cylinder and thus continuously free itself from the material flow from the excavation.
  • the effect of the break-out roller is decisively enhanced when the tube cylinder is continuously rotated by the fact that the approach, which is shaken and loosened by the roller in the trough position, and also the masonry lose their ring vault structure under permanent stress and collapse due to their own weight when they reach the slope.
  • the stabilizing disc is arranged at the rear end, the size of which is adapted to the outer diameter of the preferably conical wrapping figure of the breakout roller.
  • the stabilizing disc stabilizes the movement arrest of the break-out roller with the appropriate setting in the direction of its narrower front end.
  • the stabilizing disc ensures that the breakout roller moves in the direction of its front end.
  • the design of the stabilizing disc can be compact or structured, and can be modified in terms of its mass, its position and material, as well as its size and cross-section.
  • the stabilizing disc gives the breakout roller a changed position which is essentially not influenced by the main rubble flow.
  • a break-out roller 1 consisting of a central guide rod 2 with attached toothed disks 4, which are equipped with interchangeable break-out teeth 3 and rolling teeth 3 ', is introduced into the rotary kiln.
  • the body of the breakout roller 1 has a pointed shape in the area of the guide rod 2.
  • the break-out roller 1 When the rotary kiln is running, the break-out roller 1 is moved along with it. performs a double movement. This is on the one hand a rolling rotary movement, in which the breakout teeth 3 of the toothed disks 4 work the neck and the masonry with rhythmic beats in the lower tub area and on the other hand a longitudinal movement resulting from the conical envelope figure, which is directed towards the front end of the breakout roller 1 and thereby the process-related overcomes the slight inclination of the rotary kiln.
  • the break-out roller 1 In order to be able to control and monitor the longitudinal movement of the break-out roller 1 in accordance with the progress of work and in the case of existing assembly stages, the latter is connected at its rear end via a cable 9 to a winch 8 which is located outside the open rotary kiln. With this winch 8, it is possible to delay and stop the longitudinal movement of the breakout roller 1.
  • the breakout process consists of two phases.
  • the approach and the masonry are shaken and loosened by the break-out roller 1 in the trough position and then destroyed under permanent load in its vaulted structure in such a way that in the second phase these areas collapse during repeated turning on the slope.
  • a stabilizing disc 5 is mounted at the rear end of the breakout roller 1 and shown in Fig. 4. It causes the breakout roller 1 in the rear part outside the bottom point 15 of the rotary kiln cross section 11.
  • the break-out roller 1 moves relatively independently or outside of the oncoming debris flow 14, reducing the resistance to locomotion is gert.
  • the stabilizing disc 5 in its arrangement according to FIG. 3 ensures the locomotion of the breakout roller 1 in the direction of its narrower front end even on bare steel jacket areas of the rotary kiln 10 with the appropriate setting.
  • the installation of a sufficient number of radial adjusting elements 6 including separate contact elements 7, which are arranged evenly distributed over the circumference, increases the diameter of the stabilizing disc 5 depending on the structural length of the adjusting elements 6 and, depending on their setting, influences the movement behavior and the working capacity of the breakout roller 1
  • the size adjustability of the stabilizing disc 5 With the size adjustability of the stabilizing disc 5, the depth of cut of the cut-out teeth 3 and their impact balance are simultaneously changed.
  • the movement behavior can be converted from a modern, rhythmic beating with a small stabilizing disc 5 into a calmer rolling with a large stabilizing disc 5. In this way, it is then also possible to minimize damage from the cut-out teeth 3 on bare steel jacket surfaces of the rotary kiln 10 or on intact masonry 12. This measure also creates the conditions for a separate outbreak of approach 13.
  • the radial adjusting elements 6 are set such that the break-out teeth 3 are lifted out according to FIG. 3 between the front end and the stabilizing disc 5.
  • the main load is thus due to the design of the break-out roller 1 on the stabilizing disc 5.
  • materials with good static and sliding friction values such as. B. gunmetal or hard rubber for the contact elements 7, the movement behavior of the breakout roller is stabilized at the process-related inclination of the rotary kiln and against the debris flow 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Crushing And Grinding (AREA)
  • Incineration Of Waste (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Cleaning In General (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Drying Of Solid Materials (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Processing Of Solid Wastes (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Glass Compositions (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Pyrrole Compounds (AREA)
  • Peptides Or Proteins (AREA)

Abstract

A method for the partial or total removal of deposits and/or linings from rotary kilns by introduction of a conically shaped break off roller into the rotary kiln. The break off roller rotates together with the rotating kiln and this results in the roller impacting with its tools onto the interior surface of the kiln to break off parts thereof and to shake and vibrate the interior of the kiln to cause a collapsing thereof. The break off roller has a larger end and a smaller end and elongated guiding means for the disposition and guidance of cutting means and adjustable stabilizing means, and means for breaking and/or reversing the movement of the roller.

Description

Die Erfindung betrifft ein Verfahren zum vollständigen oder teilweisen Abarbeiten oder Ausbrechen des Ansatzes und/oder Mauerwerks aus einem Rohrzylinder, insbesondere einem Drehrohrofen der Zementindustrie, der in der Einleitung des Patentanspruchs 1 angegebenen Gattung.The invention relates to a method for complete or partial processing or breaking out of the approach and / or masonry from a tubular cylinder, in particular a rotary kiln of the cement industry, of the type specified in the introduction to claim 1.

Ferner bezieht sich die Erfindung auf eine Vorrichtung zur Durchführung des Verfahrens gemäß dem Oberbegriff des Patentanspruchs 3.Furthermore, the invention relates to a device for performing the method according to the preamble of patent claim 3.

Das Ausbrechen der sich während des Betriebes gebildeten harten Ansätze und/oder der zumindest teilweise verschlissenen Ausmauerung muß regelmäßig von Hand mit Hilfe entsprechender Werkzeuge, wie Bohrhämmer od. dgl., durchgeführt werden. Bevor das Personal den Innenraum des Drehrohrofens betreten kann, muß dessen Innentemperatur auf erträgliche Werte abgesenkt werden, was langwierige Abkühlungszeiten erfordert. Auch nach entsprechender Abkühlung sind die Ausbrucharbeiten äußerst beschwerlich und gefährlich.The breaking out of the hard deposits formed during operation and / or the at least partially worn brick lining must be carried out regularly by hand with the aid of appropriate tools, such as rotary hammers or the like. Before the personnel can enter the interior of the rotary kiln, its inside temperature has to be reduced to tolerable values, which requires lengthy cooling times. Even after cooling, the excavation work is extremely difficult and dangerous.

Um die insbesondere bezüglich der Arbeitsbedingungen schwerwiegenden Nachteile des manuellen Ausbrechens von Ansätzen und Mauerwerk aus Drehrohröfen und anderen großvolumigen Wärmereaktoren zu beseitigen, sind in der Vergangenheit eine Vielzahl von Vorschlägen zur Mechanisierung dieser Ausbruchsarbeiten gemacht worden. So ist beispielsweise aus der DD- PS 64 844 ein mechanisches Ausbruch- bzw. Reinigungsgerät bekannt, das mit Ultraschallschwingungen betrieben wird.In order to eliminate the disadvantages of manually breaking out approaches and masonry from rotary kilns and other large-volume heat reactors, which are particularly serious with regard to working conditions, a large number of proposals have been made in the past for mechanizing this excavation work. For example, a mechanical breakout or cleaning device is known from DD-PS 64 844, which is operated with ultrasonic vibrations.

Die US-A-3 025 548 offenbart eine Vorrichtung zum Entfernen fester Ansätze aus einem Drehrohrofen mittels eines Schrämmkopfes, der am freien Ende einer formsteifen Stange befestigt ist und durch deren Längsbewegung in den Drehrohrofen von einer Stirnseite aus eingeführt wird. Der Ausbruch der Ansätze bzw. der Ausmauerung erfolgt durch die am Schrämmkopf vorgesehenen Ausbruchzähne bei gleichzeitiger Rotation des Drehrohrs.US-A-3 025 548 discloses a device for removing solid attachments from a rotary kiln by means of a cutting head which is fastened to the free end of a dimensionally stable rod and is introduced into the rotary kiln from one end by its longitudinal movement. The outcrops or the masonry are broken out by the cut-out teeth provided on the cutting head with simultaneous rotation of the rotary tube.

Aufgabe der Erfindung ist es, ein Verfahren zum vollständigen oder teilweisen Ausbrechen der Ansätze und/oder des Mauerwerks aus liegenden um ihre Längsachse drehenden Rahrzylindem, insbesondere aus Drehrohröfen, zu schaffen, das ein kontinuierliches, durchgängiges oder partielles Ausbrechen ohne Abkühlung des Rohrzylinders mit steuerbarer Ausbruchstiefe, Ausbruchslänge und Vortriebsgeschwindigkeit ermöglicht. Die Vorrichtung zur Durchführung des Verfahrens soll konstruktiv einfach ausgebildet sein und auch bei den langgestreckten und großvolumigen Drehrohröfen der Zementindustrie eingesetzt werden können.The object of the invention is to provide a method for completely or partially breaking out the lugs and / or the masonry from horizontal Rahr cylinders rotating around their longitudinal axis, in particular from rotary kilns, which allows continuous, continuous or partial breaking out without cooling the pipe cylinder with controllable breakout depth , Excavation length and speed of advance enabled. The device for carrying out the method should be of simple construction and should also be able to be used in the elongated and large-volume rotary kilns of the cement industry.

Diese Aufgabe wird verfahrensmäßig durch die im Patentanspruch 1 angegebenen Merkmale gelöst.This object is achieved procedurally by the features specified in claim 1.

Gemäß der Erfindung erfolgt das Ausbrechen der Ansätze und/oder des Mauerwerks aus dem Rohrzylinder durch Schlag-, Stoß- oder Reißeinwirkungen, welche von den Zähnen der Ausbruchswalze auf die Innenfläche des Rohrzylinders ausgeübt werden. Aufgrund der Rotation des Rohrzylinders führt die auf dessen Bodenbereich aufliegende Ausbruchswalze eine Rollbewegung aus, wobei die durch ihre Schrägstellung gegenüber der Längsachse des Rohrzylinders erzeugte Längsbewegung einen selbsttätigen Durchlauf der Ausbruchswalze durch die gesamte Länge des Rohrzylinders bewirkt, und zwar entgegen der Neigung des Rohrzylinders.According to the invention, the lugs and / or the masonry are broken out of the tubular cylinder by impact, impact or tearing which are exerted by the teeth of the breakout roller on the inner surface of the tubular cylinder. Due to the rotation of the tubular cylinder, the break-out roller resting on its base area executes a rolling movement, the longitudinal movement generated by its inclination with respect to the longitudinal axis of the tubular cylinder causing the break-out roller to pass through the entire length of the tubular cylinder automatically, against the inclination of the tubular cylinder.

Gemäß einer zweckmäßigen Ausgestaltung der Erfindung wird die Durchlaufgeschwindigkeit der Ausbruchswalze durch einen Seilzug verzögert, gestoppt oder in ihrer Richtung umgekehrt.According to an expedient embodiment of the invention, the throughput speed of the break-out roller is delayed, stopped or reversed in its direction by a cable pull.

Eine zur Durchführung des erfindungsgemäßen Verfahrens besonders geeignete Vorrichtung ist im Patentanspruch 3 angegeben. Durch die radial vorstehende Stabilisierungsscheibe ergibt sich die Schrägstellung der im Bodenbereich des Rohrzylinders aufliegenden Ausbruchswalze, welche bei der Rotation des Rohrzylinders und der Abrollbewegung der Ausbruchswalze deren Längsbewegung verursacht. Die mit den Ausbruchszähnen besetzte eckige Zahnscheibe bewirkt bei der Rollbewegung der Ausbruchswalze einen schlag- bzw. stoßartigen Eingriff der Zähne in den Ansatz bzw. das Mauerwerk des Rohrzylinders.A device which is particularly suitable for carrying out the method according to the invention is specified in patent claim 3. The radially protruding stabilizing disc results in the inclined position of the break-out roller resting in the base region of the tubular cylinder, which causes the longitudinal movement of the break-out roller when the tubular cylinder rotates and unrolls. The angular toothed disk with the breakout teeth causes an abrupt or impact-like engagement of the teeth in the extension or the masonry of the tubular cylinder when the breakout roller rolls.

Zweckmäßig ist die Ausbruchswalze konisch ausgebildet, wobei die Zahnscheibe mehrere Zahnpaare von gleicher Größe aufweist.The breakout roller is expediently conical, the toothed disk having several pairs of teeth of the same size.

Ferner ist es zweckmäßig, wenn die Zahnspitzen von jeweils vier gleichen Ausbruchszähnen und vier Abrollzähnen jeweils für sich ein Quadrat bilden, wobei die aus den Zahnspitzen gebildeten beiden Quadrate so zueinander versetzt sind, daß ein ungleichmäßiges Achteck entsteht. Ferner können die keilförmigen Ausbruchszähne bei Vorsehen von mindestens zwei Zahnscheiben in ihrer Mehrzahl mit der Schneidenbreite rechtwinklig zur Längsachse der Ausbruchswalze ausgerichtet sein. Die schlagartige Einwirkung der Ausbruchszähne auf die Ansätze bzw. das Mauerwerk wird intensiviert, wenn diese so an der Zahnscheibe angeordnet sind, daß sie senkrecht auf die Innenwandung des Rohrzylinders auftreffen.Furthermore, it is expedient if the tooth tips of four identical break-out teeth and four rolling teeth each form a square for themselves, the two squares formed from the tooth tips being offset from one another in such a way that an uneven octagon is formed. Furthermore, if at least two toothed disks are provided, the majority of the wedge-shaped breakout teeth can be aligned with the cutting width at right angles to the longitudinal axis of the breakout roller. The sudden action of the cut-out teeth on the approaches or the masonry is intensified if these are arranged on the toothed disk in such a way that they strike the inner wall of the tubular cylinder perpendicularly.

Eine besonders zweckmäßige Ausgestaltung der erfindungsgemäßen Vorrichtung zeichnet sich dadurch aus, daß die Stabilisierungsscheibe in ihrer Größe und in ihrem radialen Verstellbereich etwa dem Durchmesser der Umhüllungsfigur der Ausbruchswalze angepaßt ist und an ihrem Umfang gleichmäßig verteilt angeordnete radiale Verstellelemente aufweist. Diese Verstellelemente können an ihrem äußeren Ende Kontaktelemente besitzen. Der Abstand der Stabilisierungsscheibe von der Zahnscheibe sollte zweckmäßigerweise größer und ungleich der Längsabmessung eines Steins der Ofenausmauerung sein.A particularly expedient embodiment of the device according to the invention is characterized in that the size and the radial adjustment area of the stabilizing disk is adapted approximately to the diameter of the enveloping figure of the break-out roller and has radial adjustment elements arranged uniformly distributed on its circumference. These adjustment elements can have contact elements at their outer end. The distance between the stabilizing disc and the toothed disc should advantageously be larger and not equal to the longitudinal dimension of a brick of the furnace lining.

Durch die angemessene Eigenmasse der Ausbruchswalze und die austauschbaren Abbruchwerkzeuge werden bei ihrer Abrollbewegung die Ansätze und das Mauerwerk durch Schlag-, Stoß-und Reißkräfte mürbegearbeitet, bis es ausbricht. Je nach dem konkreten Einsatz kann die Ausbruchswalze kompakt, gegliedert oder hohl sowie in ihrer Masse, Größe, Art und Anzahl der Ausbruchswerkzeuge, im Material und im gewählten Querschnitt variabel gestaltet werden.Due to the appropriate weight of the Aus break roller and the interchangeable demolition tools during their rolling movement the roots and the masonry are milled by impact, impact and tear forces until it breaks out. Depending on the specific application, the breakout roller can be compact, structured or hollow as well as variable in its mass, size, type and number of breakout tools, in the material and in the selected cross section.

Unabhängig von den möglichen Verschiedenheiten weist die Ausbruchswalze bei ihrer Abrollbewegung eine konische bzw. kegelförmige Umhüllungsfigur auf, die Ursache für ihre Längsbewegung entgegen der Neigung des Rohrzylinders ist. Durch den an ihrem rückwärtigen Ende angeschlossenen Seilzug kann diese Längsbewegung der Ausbruchswalze gesteuert werden. Dabei wird auch die verfahrensbedingte Längsneigung des Drehrohrofens überwunden. Mit dem Seilzug kann die Längsbewegung je nach Arbeitsfortschritt gebremst, verzögert oder umgekehrt werden. Damit kann die Ausbruchswalze unter Ausnutzung des Ofenantriebs die gesamte Innenfläche des Rohrzylinders abfahren.Regardless of the possible differences, the breakout roller has a conical or conical envelope figure during its rolling movement, which is the reason for its longitudinal movement against the inclination of the tubular cylinder. This longitudinal movement of the break-out roller can be controlled by the cable pull connected to its rear end. The process-related longitudinal inclination of the rotary kiln is also overcome. Depending on the progress of work, the longitudinal movement can be slowed down, slowed down or reversed with the cable pull. This allows the breakout roller to travel the entire inner surface of the tubular cylinder using the furnace drive.

Von der Querschnittsform der Walze werden die Arbeitswirkung und das Bewegungsverhalten beeinflußt. So erzeugt ein vorteilhaft eckiger Walzenquerschnitt beim Drehen rhythmische Aufschläge, was die Wucht deutlich erhöht. Außerdem kann sich eine Walze mit eckigem Querschnitt aus der unteren Wannenlage im Rohrzylinder herausbewegen und sich somit vom Materialstrom des Ausbruchs ständig neu befreien. Die Wirkung der Ausbruchswalze wird beim kontinuierlichen Drehen des Rohrzylinders dadurch entscheidend verstärkt, daß der durch die Walze in der Wannenlage erschütterte und vorgelockerte Ansatz und ebenso das Mauerwerk unter Dauerbelastung ihre Ringgewölbestruktur verlieren und infolge ihres Eigengewichtes beim Erreichen der Hanglage einstürzen. Entsprechend den geometrischen Verhältnissen der Ausbruchswalze ist am hinteren Ende die Stabilisierungsscheibe angeordnet, die in ihrer Größe dem äußeren Durchmesser der vorzugsweise konischen Umhüllungsfigur der Ausbruchswalze angepaßt ist. Die Stabilisierungsscheibe stabilisiert das Bewegungsverhaften der Ausbruchswalze bei entsprechender Einstellung in Richtung ihres schmaleren Vorderendes. Insbesondere dann, wenn sich die Ausbruchswalze auf dem vom Ansatz und Mauerwerk schon freien Innenmantel des Drehrohrofens bewegen muß, gewährleistet die Stabilisierungsscheibe eine Fortbewegung der Ausbruchswalze in Richtung ihres Vorderendes. Die Stabilisierungsscheibe kann in ihrer Ausführung kompakt oder gegliedert, veränderbar in der Masse, in ihrer Lage und im Material sowie in ihrer Größe und im gewählten Querschnitt ausgeführt sein. Die Stabilisierungsscheibe gibt der Ausbruchswalze eine veränderte Lage, die vom Hauptschuttstrom im wesentlichen nicht beeinflußt wird.The cross-sectional shape of the roller influences the working effect and the movement behavior. An advantageous angular roller cross section creates rhythmic impacts when turning, which significantly increases the force. In addition, a roller with an angular cross-section can move out of the lower trough position in the tubular cylinder and thus continuously free itself from the material flow from the excavation. The effect of the break-out roller is decisively enhanced when the tube cylinder is continuously rotated by the fact that the approach, which is shaken and loosened by the roller in the trough position, and also the masonry lose their ring vault structure under permanent stress and collapse due to their own weight when they reach the slope. In accordance with the geometric conditions of the breakout roller, the stabilizing disc is arranged at the rear end, the size of which is adapted to the outer diameter of the preferably conical wrapping figure of the breakout roller. The stabilizing disc stabilizes the movement arrest of the break-out roller with the appropriate setting in the direction of its narrower front end. In particular when the breakout roller has to move on the inner jacket of the rotary kiln that is already free of attachment and masonry, the stabilizing disc ensures that the breakout roller moves in the direction of its front end. The design of the stabilizing disc can be compact or structured, and can be modified in terms of its mass, its position and material, as well as its size and cross-section. The stabilizing disc gives the breakout roller a changed position which is essentially not influenced by the main rubble flow.

Die Erfindung soll nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert werden. Es zeigen :

  • Fig. 1 den einen Abschnitt eines Drehrohrofens im Schnitt mit eingeführter Ausbruchswalze ;
  • Fig. 2 einen Querschnitt des Drehrohrofens mit der Ausbruchswalze in Bewegungsphasen ;
  • Fig. 3 die Ausbruchswalze in Seitenansicht;
  • Fig. 4 die Rückansicht der Vorrichtung mit der Stabilisierungsscheibe.
The invention will be explained below with reference to an embodiment shown in the drawing. Show it :
  • Figure 1 shows a section of a rotary kiln in section with an inserted breakout roller.
  • Figure 2 shows a cross section of the rotary kiln with the breakout roller in phases of movement.
  • Figure 3 shows the breakout roller in side view.
  • Fig. 4 is the rear view of the device with the stabilizing disc.

Die Fig. 1 bis 3 zeigen den Teil eines liegenden Drehrohrofens von nahezu beliebiger Länge und beliebigem Durchmesser, der unter Ausnutzung des vorhandenen Eigenantriebes von Ansatz und Mauerwerk befreit wird. Dazu wird eine Ausbruchswalze 1, bestehend aus einem zentralen Führungsstab 2 mit aufgesetzten Zahnscheiben 4, die mit auswechselbaren Ausbruchszähnen 3 und Abrollzähnen 3' ausgerüstet sind, in den Drehrohrofen eingeführt. Der Körper der Ausbruchswalze 1 erhält eine spitze Gestalt im Bereich des Führungsstabes 2. Eine sinnvolle Aneinanderreihung von mit Ausbruchszähnen 3 sowie Abrollzähnen 3' besetzten und der Größe nach abgestuften Zahnscheiben 4, die am Führungsstab 2 befestigt sind, bedingen eine konische Hüllfigur der Ausbruchswalze 1. Beim Laufen des Drehrohrofens wird die Ausbruchswalze 1 mitbewegt, wobei sie. eine Doppelbewegung ausführt. Das ist einmal eine walzende Drehbewegung, bei der die Ausbruchszähne 3 der Zahnscheiben 4 mit rhythmischen Schlägen im unteren Wannenbereich den Ansatz und das Mauerwerk bearbeiten und zum anderen eine aus der konischen Hüllfigur resultierende Längsbewegung, die zum Vorderende der Ausbruchswalze 1 gerichtet ist und dabei die verfahrensbedingte leichte Neigung des Drehrohrofens überwindet. Um die Längsbewegung der Ausbruchswalze 1 entsprechend dem Arbeitsfortschritt und bei vorhandenen Montagestufen steuern und kontrollieren zu können, ist diese an ihrem rückwärtigen Ende über einen Seilzug 9 an eine Winde 8 angeschlossen, die sich außerhalb des geöffneten Drehrohrofens befindet. Mit dieser Winde 8 ist es möglich, die Längsbewegung der Ausbruchswalze 1 zu verzögern und zu stoppen.1 to 3 show the part of a horizontal rotary kiln of almost any length and diameter, which is freed from the approach and masonry using the existing self-propulsion. For this purpose, a break-out roller 1, consisting of a central guide rod 2 with attached toothed disks 4, which are equipped with interchangeable break-out teeth 3 and rolling teeth 3 ', is introduced into the rotary kiln. The body of the breakout roller 1 has a pointed shape in the area of the guide rod 2. A meaningful sequence of toothed disks 4 which are equipped with breakout teeth 3 and rolling teeth 3 'and are graduated in size and which are fastened to the guide rod 2, require a conical enveloping figure of the breakout roller 1. When the rotary kiln is running, the break-out roller 1 is moved along with it. performs a double movement. This is on the one hand a rolling rotary movement, in which the breakout teeth 3 of the toothed disks 4 work the neck and the masonry with rhythmic beats in the lower tub area and on the other hand a longitudinal movement resulting from the conical envelope figure, which is directed towards the front end of the breakout roller 1 and thereby the process-related overcomes the slight inclination of the rotary kiln. In order to be able to control and monitor the longitudinal movement of the break-out roller 1 in accordance with the progress of work and in the case of existing assembly stages, the latter is connected at its rear end via a cable 9 to a winch 8 which is located outside the open rotary kiln. With this winch 8, it is possible to delay and stop the longitudinal movement of the breakout roller 1.

Wie Fig. 2 zeigt, besteht der Ausbruchsvorgang aus zwei Phasen. In der ersten Phase werden der Ansatz und das Mauerwerk durch die Ausbruchswalze 1 in der Wannenlage erschüttert und aufgelockert und dann unter Dauerbelastung in seiner Gewölbestruktur so zerstört, daß es in der zweiten Phase zum Einstürzen dieser Bereiche beim wiederholten Drehen in die Hanglage kommt. Eine Stabilisierungsscheibe 5 ist am hinteren Ende der Ausbruchswalze 1 montiert und in Fig. 4 dargestellt. Sie bewirkt, daß die Ausbruchswalze 1 im hinteren Teil außerhalb des Sohlpunktes 15 des Drehrohrofenquerschnittes 11 liegt. Beim Bewegen der Ausbruchswalze 1 durch die Drehbewegung des Drehrohrofens 10 ergeben sich dadurch während des Ausbruchsvorganges folgende Effekte :As shown in Fig. 2, the breakout process consists of two phases. In the first phase, the approach and the masonry are shaken and loosened by the break-out roller 1 in the trough position and then destroyed under permanent load in its vaulted structure in such a way that in the second phase these areas collapse during repeated turning on the slope. A stabilizing disc 5 is mounted at the rear end of the breakout roller 1 and shown in Fig. 4. It causes the breakout roller 1 in the rear part outside the bottom point 15 of the rotary kiln cross section 11. When the break-out roller 1 is moved by the rotary movement of the rotary kiln 10, the following effects result during the break-out process:

Die Ausbruchswalze 1 bewegt sich entsprechend Fig. 4 relativ unabhängig bzw. außerhalb des ihr entgegenkommenden Schuttstromes 14, wodurch der Fortbewegungswiderstand verringert wird.4, the break-out roller 1 moves relatively independently or outside of the oncoming debris flow 14, reducing the resistance to locomotion is gert.

Die Stabilisierungsscheibe 5 in ihrer Anordnung nach Fig. 3 gewährleistet, auch auf blanken Stahlmantelbereichen des Drehrohrofens 10 bei entsprechender Einstellung die Fortbewegung der Ausbruchswalze 1 in Richtung ihres schmaleren Vorderendes.The stabilizing disc 5 in its arrangement according to FIG. 3 ensures the locomotion of the breakout roller 1 in the direction of its narrower front end even on bare steel jacket areas of the rotary kiln 10 with the appropriate setting.

Der Anbau einer genügenden Anzahl radialer Verstellelemente 6 einschließlich gesonderter Kontaktelemente 7, die auf den Umfang gleichmäßig verteilt angeordnet sind, vergrößert je nach der konstruktiven Länge der Verstellelemente 6 den Durchmesser der Stabilisierungsscheibe 5 und beeinflußt je nach ihrer Einstellung das Bewegungsverhalten sowie das Arbeitsvermögen der Ausbruchswalze 1. Mit der Größenverstellbarkeit der Stabilisierungsscheibe 5 wird gleichzeitig die Schlagtiefe der Ausbruchszähne 3 und deren Schlagwucht verändert. Außerdem kann das Bewegungsverhalten von einem poltemden, rhythmischen Schlagen bei kleiner Stabilisierungsscheibe 5 in ein beruhigteres Rollen bei großer Stabilisierungsscheibe 5 umgewandelt werden. Auf diese Weise ist es dann auch möglich, Beschädigungen durch die Ausbruchszähne 3 an blanken Stahlmantelflächen des Drehrohrofens 10 oder an intaktem Mauerwerk 12 zu minimieren. Diese Maßnahme schafft gleichzeitig die Voraussetzung für einen separaten Ausbruch des Ansatzes 13.The installation of a sufficient number of radial adjusting elements 6 including separate contact elements 7, which are arranged evenly distributed over the circumference, increases the diameter of the stabilizing disc 5 depending on the structural length of the adjusting elements 6 and, depending on their setting, influences the movement behavior and the working capacity of the breakout roller 1 With the size adjustability of the stabilizing disc 5, the depth of cut of the cut-out teeth 3 and their impact balance are simultaneously changed. In addition, the movement behavior can be converted from a modern, rhythmic beating with a small stabilizing disc 5 into a calmer rolling with a large stabilizing disc 5. In this way, it is then also possible to minimize damage from the cut-out teeth 3 on bare steel jacket surfaces of the rotary kiln 10 or on intact masonry 12. This measure also creates the conditions for a separate outbreak of approach 13.

Bei einem kontrollierten Bewegen der Ausbruchswalze 1 auf dem blanken Stahlmantel gegen den Schüttstrom 14 sind die radialen Verstellelemente 6 so eingestellt, daß die Ausbruchszähne 3 entsprechend Fig. 3 zwischen dem Vorderende und der Stabilisierungsscheibe 5 ausgehoben werden. Damit liegt die Hauptlast aufgrund der Gestaltung der Ausbruchswalze 1 auf der Stabilisierungsscheibe 5. Durch die Auswahl von Werkstoffen mit guten Haft- und Gleitreibungswerten, wie z. B. Rotguß oder Hartgummi für die Kontaktelemente 7, wird das Bewegungsverhalten der Ausbruchswalze bei der verfahrensbedingten Neigung des Drehrohrofens und gegen den Schuttstrom 14 stabilisiert.When the break-out roller 1 is moved in a controlled manner on the bare steel jacket against the bulk flow 14, the radial adjusting elements 6 are set such that the break-out teeth 3 are lifted out according to FIG. 3 between the front end and the stabilizing disc 5. The main load is thus due to the design of the break-out roller 1 on the stabilizing disc 5. By selecting materials with good static and sliding friction values, such as. B. gunmetal or hard rubber for the contact elements 7, the movement behavior of the breakout roller is stabilized at the process-related inclination of the rotary kiln and against the debris flow 14.

Claims (14)

1. A method of completely or partly removing or clearing incrustation and/or masonry in a cylindrical tube rotating around a longitudinal axis at an angle to the horizontal, more particu- lady a rotary kiln in the cement industry, using the rotation imparted to the cylindrical tube by means of a toothed clearing roller inserted into the cylindrical tube and exerting impact, striking and tearing forces on the incrustation or the masonry, the clearing roller, which rotates freely and rests on the rotating cylindrical tube, being given an oblique position relative to the longitudinal axis of the cylindrical tube, so that the clearing roller moves longitudinally against the inclination of the cylindrical tube.
2. A method according to claim 1, characterised in that the longitudinal motion of the clearing roller resting in the cylindrical tube is delayed or stopped or reversed by a cable connected to the clearing roller.
3. A means for working the method according to claim 1 or 2, comprising a clearing roller (1) having teeth (3) and insertable into a rotating cylindrical tube (10) and connected by a holder to a guide station (8) disposed outside the cylindrical tube, characterised in that the clearing roller (1), which rests freely in the cylindrical tube (1) and is rotated thereby, has a radially projecting stabilising plate (5) at one end and at least one angular toothed plate (4) outside its centre of gravity and having peripheral teeth (3, 3') which vary in shape and position.
4. A means according to claim 3, characterised in that the teeth (3, 3') are disposed in pairs on the toothed plate (4).
5. A means according to claim 4, characterised in that the pairs of teeth (3, 3') have the same size.
6. Means according to any of claims 3 to 6, characterised in that the toothed plates (4) have a square shape and the clearing teeth (3, 3') are disposed in pairs at their comer regions.
7. Means according to claim 6, characterised in that the tips of each group of four similar clearing teeth (3) and rolling teeth (3') form a square.
8. Means according to claim 7, characterised in that the squares formed by the toothed tips are offset from one another so as to form an irregular octagon.
9. Means according to claim 8, characterised in that the wedged-shaped clearing teeth (3), when there are at least two toothed plates (4), are mostly disposed so that the wide parts of their edges are at right angles to the longitudinal axis of the clearing roller (1).
10. Means according to claim 9, characterised in that the clearing teeth (3) on each toothed plate (4), when supported in common with the rolling teeth (3'), are aligned at right angles to the inner wall of the cylindrical tube (10).
11. Means according to any of claims 3 to 10, characterised in that the holder in the form of a cable is connected to the end of the clearing roller bearing the stabilising plate (5), and the size and radial range of adjustment of the stabilising plate (5) are adjusted to the diameter of the envelope of the clearing roller (1).
12. Means according to claim 4 or 11, characterised in that the stabilising plate (5) comprises radial adjusting elements which are uniformly distributed at its periphery.
13. Means according to claim 12, characterised in that the radial adjusting elements (6) are provided with contact elements (7) at their fully extended position.
14. Means according to any of claims 3 to 13, characterised in that the distance between the stabilising plate (5) and the largest toothed plate (4) is greater than and different from the dimensions of a brick on the refractory lining in the longitudinal direction of the cylindrical tube (10).
EP85111353A 1985-06-06 1985-09-09 Process and device to remove deposits and linings from reposing drums, in particular those in rotative drum furnaces Expired - Lifetime EP0205651B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111353T ATE49803T1 (en) 1985-06-06 1985-09-09 METHOD AND DEVICE FOR BREAKING OUT THE NECK AND MASONRY IN LYING TUBE CYLINDERS, PARTICULARLY IN ROTARY TUBE FURNACES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD85277103A DD238102A1 (en) 1985-06-06 1985-06-06 METHOD AND DEVICE FOR BREAKING THE APPROACH AND WALL-MOUNTED THROWING DROUGHT PISTON
DD277103 1985-06-06

Publications (2)

Publication Number Publication Date
EP0205651A1 EP0205651A1 (en) 1986-12-30
EP0205651B1 true EP0205651B1 (en) 1990-01-24

Family

ID=5568404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111353A Expired - Lifetime EP0205651B1 (en) 1985-06-06 1985-09-09 Process and device to remove deposits and linings from reposing drums, in particular those in rotative drum furnaces

Country Status (16)

Country Link
US (1) US4775315A (en)
EP (1) EP0205651B1 (en)
JP (1) JPS61282786A (en)
CN (1) CN1011340B (en)
AT (1) ATE49803T1 (en)
BG (1) BG48460A3 (en)
CS (1) CS619685A3 (en)
DD (1) DD238102A1 (en)
DE (1) DE3575601D1 (en)
DK (1) DK390685A (en)
ES (1) ES8704257A1 (en)
FI (1) FI82983C (en)
HU (1) HU201398B (en)
RO (1) RO94291B (en)
SU (1) SU1706403A3 (en)
YU (1) YU44282B (en)

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DE29704044U1 (en) * 1997-03-06 1998-07-09 VEBA OEL Technologie und Automatisierung GmbH, 45879 Gelsenkirchen Rolling body for a rotating drum and a rotating drum comprising rolling bodies

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DE3632670A1 (en) * 1986-09-26 1988-04-07 Boge Ag HYDRAULIC DAMPING RUBBER BEARING
DD271559A1 (en) * 1988-04-28 1989-09-06 Magdeburg Spezialbau DEVICE FOR EXCAVING SMALL PARTIAL AREAS OF THE APPROACH AND THE WALL PLATE IN THROUGHPUTS
US5015299A (en) * 1988-05-19 1991-05-14 Veb Spezialbaukombinat Magdeburg Method and apparatus for the removal of deposits from the inner surfaces of horizontal cylinders
DE20019275U1 (en) * 2000-11-13 2002-03-28 VEBA OEL Technologie und Automatisierung GmbH, 45879 Gelsenkirchen Rotary drum with rolling element arrangement
CA2362028C (en) 2000-11-13 2009-01-20 Veba Oel Technologie Und Automatisierung Gmbh Rotary drum with rolling body arrangement
FI124021B (en) * 2013-01-23 2014-02-14 Termorak Oy Method for removing deposits and / or feed material from rotary furnaces
CN105855530A (en) * 2015-01-23 2016-08-17 鞍钢股份有限公司 Slag scraping and breaking device for steel ladle and using method thereof
CN104930870A (en) * 2015-06-30 2015-09-23 辽宁科技大学 Device for using high pressure gas to drive bullet to remove rotary kiln outlet slag
CN110773728A (en) * 2019-11-05 2020-02-11 湖北华远装备制造股份有限公司 Automatic cleaning device of incomplete steel slag of middle package
CN113739567B (en) * 2021-07-28 2023-01-03 西安交通大学 Method and system for evaluating state of rotary kiln body

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DE29704044U1 (en) * 1997-03-06 1998-07-09 VEBA OEL Technologie und Automatisierung GmbH, 45879 Gelsenkirchen Rolling body for a rotating drum and a rotating drum comprising rolling bodies

Also Published As

Publication number Publication date
ES8704257A1 (en) 1987-03-16
YU44282B (en) 1990-04-30
FI860121A (en) 1986-12-07
DK390685D0 (en) 1985-08-28
CN1011340B (en) 1991-01-23
BG48460A3 (en) 1991-02-15
DD238102A1 (en) 1986-08-06
DE3575601D1 (en) 1990-03-01
HU201398B (en) 1990-10-28
ATE49803T1 (en) 1990-02-15
RO94291B (en) 1988-07-01
ES555824A0 (en) 1987-03-16
HUT43713A (en) 1987-11-30
FI82983B (en) 1991-01-31
CN85107490A (en) 1986-12-03
RO94291A (en) 1988-06-30
FI82983C (en) 1991-05-10
CS619685A3 (en) 1992-01-15
FI860121A0 (en) 1986-01-10
YU31086A (en) 1988-10-31
JPS61282786A (en) 1986-12-12
JPH0351994B2 (en) 1991-08-08
US4775315A (en) 1988-10-04
SU1706403A3 (en) 1992-01-15
EP0205651A1 (en) 1986-12-30
DK390685A (en) 1986-12-07

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